Pre event
9/30/19, 8:00 AM - 9/30/19, 5:00 PM
Presenter(s): Instructors: Gustavo Lacerda – CTO with Enacom | Matheus Mendonça – Optimization Manager with Enacom
Abstract:
Pre event
9/30/19, 8:00 AM - 9/30/19, 5:30 PM
Presenter(s): Instructors: Alei Domingues – Researcher at Vale S.A.’s Ferrous Metals Technology Center | Washington Mafra – Researcher at Vale S.A.’s Ferrous Metals Technology Center | Flávio Dutra – Researcher at Vale S.A.’s Ferrous Metals Technology Center | Fernando Campos – Chief operating officer with CPM – Companhia de Processamento Mineral
Abstract:
Pre event
9/30/19, 9:00 AM - 9/30/19, 1:00 PM
Presenter(s):
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Pre event
9/30/19, 9:00 AM - 9/30/19, 6:00 PM
Presenter(s): Instructor: Jose M. Rodriguez Ibabe – Full professor and senior researcher at Ceit-IK4 - Centro de Estudios e Investigaciones Técnicas de Gipuzkoa (University of Navarra)
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Pre event
9/30/19, 2:00 PM - 9/30/19, 7:00 PM
Presenter(s):
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Pre event
9/30/19, 2:00 PM - 9/30/19, 7:00 PM
Presenter(s): Instructors: Bruno Flores – Postdoctoral instructor with LaSid / CNPq – Federal University of Rio Grande do Sul (UFRGS) | Anderson Agra – Postdoctoral instructor with LaSid / CNPq – Federal University of Rio Grande do Sul (UFRGS)
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Energy Balances
10/1/19, 4:30 AM - 10/1/19, 6:30 AM
Presenter(s): Coordinator and moderator: Carlos Alberto Nolasco – consultant
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10/1/19, 7:00 AM - 10/3/19, 6:00 PM
Presenter(s):
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Plenary
10/1/19, 8:10 AM - 10/1/19, 8:35 AM
Presenter(s): ARTHUR FELIPE LINO OLIVEIRA (laboratório de processos siderúrgicos - Ufmg), Rafael Adriano Lopes Júnior (LABORATÓRIO DE PROCESSOS SIDERÚRGICOS - ufmg), Ismael Vemdrame Flores (LABORATÓRIO DE PROCESSOS SIDERÚRGICOS - UFMG), Maurício Covcevich Bagatini (LABORATÓRIO DE PROCESSOS SIDERÚRGICOS - UFMG)
Abstract:
The use of pellet feed to adjust the chemical quality of the sinter is an alternative to the depletion of iron ore reserves. However, the addition of ultrafine in the sintering process can cause decrease of permeability and consequent drop in machine productivity. In this context, the present work investigated the addition of natural and ground pellet feed, evaluating its effects on cold agglomeration for sintering and quality of quasi-particles produced. Eight typical mixtures with industrial composition were produced in the laboratory, replacing Sinter Feed with different percentages of Natural Pellet Feed (NPF, 91% <150 μm) and Ground Pellet Feed (GPF, 83% <44 μm). The mixtures were subjected to cold agglomeration tests and the quasi-particles produced were evaluated by screening, shatter test, permeability test and disintegration into primary particles analysis. There was a decrease in the mean particle size of quasi-particles and reduce in permeability with addition of the ultrafines. The addition of NPF favored the layering mechanism in larger quasi-particles. The coalescence mechanism occurred for larger additions of NPF and GPF, being more expressive for GFM additions.
Plenary
10/1/19, 8:35 AM - 10/1/19, 9:00 AM
Presenter(s): robert paul Mawer (Primetals technologies)
Abstract:
In recent times there has been an increase in the demand from Steel plants for a technology that offers the most economical environmentally sustainable solution. In terms of blast furnace off gas cleaning this has seen a drive towards Cyclone technology replacing the older Dustcatchers. Cyclone technology can achieve dust removal efficiencies as high as 95% increasing the dust yield at the primary stage of gas cleaning. The dry dust (rich in Fe and C) can then be recycled to the Sinter Plant or Blast Furnace. Capture of dust at this stage also has the benefit that sludge generation from the secondary stage is also reduced meaning less waste to landfill and / or recovery of some of the by-products for further use. Primetals Technologies already offer a state of the art Tri-Axial Cyclone installed on many sites world-wide, however, this paper focuses on a hybrid of this technology, the DustClone. The DustClone is a low CAPEX unit that is essentially a Cyclone housed inside the Dustcatcher. This unit is aimed at operators who may be carrying out smaller scaled shutdowns / repairs that normally have a reduced CAPEX. This paper describes the technology that Primetals Technologies have developed.
Plenary
10/1/19, 8:35 AM - 10/1/19, 9:00 AM
Presenter(s): MATHEUS MARIANO DA SILVA REIS (universidade federal de sergipe)
Abstract:
Fault analysis is a model used to prevent or analyze nonconformities in projects, industrial processes or products. This method consists of a technical investigation, where it is possible to reveal several items in the project, such as material imperfection, project errors, improper maintenance and so on. This work had as objective to perform the analysis of failure of a determined axis, in order to find the main causes that caused the fracture of the piece. For this, some analyzes were performed as: visual analysis, chemical analysis, microstructure analysis and microhardness. After all the analysis, it was verified that the axis underwent a welding process, which reduced its resistance to fatigue nucleation, consequently leading to failure due to repeated bending.
Plenary
10/1/19, 8:35 AM - 10/1/19, 9:00 AM
Presenter(s): Vinicius lemos pereira (Unifesspa - universidade federal do sul e sudeste do pará), beatriz cordeiro de bona (UNIFESSPA - UNIVERSIDADE FEDERAL DO SUL E SUDESTE DO PARÁ), isaac gabriel peixoto borges de oliveira (UNIFESSPA - UNIVERSIDADE FEDERAL DO SUL E SUDESTE DO PARÁ), ponnyk melo torres (UNIFESSPA - UNIVERSIDADE FEDERAL DO SUL E SUDESTE DO PARÁ), dilson nazareno pereira cardoso (ufpa - universidade federal do pará), lygia maria policarpio ferreira (UNIFESSPA - UNIVERSIDADE FEDERAL DO SUL E SUDESTE DO PARÁ), CLESIANU RODRIGUES DE LIMA (UNIFESSPA - UNIVERSIDADE FEDERAL DO SUL E SUDESTE DO PARÁ)
Abstract:
The inadequate allocation of construction waste generated through demolition, renovation and construction of works cause social and environmental impacts. Recycling is the most appropriate method for the reuse of such waste. In order to give purpose to these residues, the synthesis of geopolymers based on construction waste (red ceramic waste and cement residue) was developed using sodium hydroxide, alkali sodium silicate solution and water. Two formulations were produced for the production of the specimens, which were cured at room temperature and in an oven at 80ºC for 7 days. After the healing, tests of resistance to axial compression, water absorption by capillarity, apparent porosity and density were performed. The results showed a geopolymer with 22.47 MPa of compressive strength, 9.65% apparent water absorption, 16.45% apparent porosity and density of 1.70 g/cm³, for healing at 80 ° C, it being observed that when increasing the healing temperature, we increase the compressive strength of the obtained geopolymer. This demonstrates a potential for its use in the construction industry, as well as adequate waste disposal for this sector.
Plenary
10/1/19, 8:35 AM - 10/1/19, 9:00 AM
Presenter(s): Oscar Olimpio de Araujo Filho (ufpe - universidade federal de pernambuco), Ana Cristina Ribeiro Pires (UFPE - UNIVERSIDADE FEDERAL DE PERNAMBUCO), Thamy Gomes Pacheco Sobreira (UFPE - UNIVERSIDADE FEDERAL DE PERNAMBUCO), Ana Carolina Gadelha de Almeida (UFPE - UNIVERSIDADE FEDERAL DE PERNAMBUCO), Everthon Rodrigues de Araújo (UFPE - UNIVERSIDADE FEDERAL DE PERNAMBUCO), Heronilton Mendes de Lira (UFPE - UNIVERSIDADE FEDERAL DE PERNAMBUCO)
Abstract:
The following work presents the production results of AA7075 aluminum metal matrix composites reinforced by silicon carbide through powder metallurgy (PM) techniques of mechanical alloying, uniaxial compaction and sintering under nitrogen (N2) atmosphere. The powders processed by mechanical alloying were characterized by SEM, XRD and Laser diffraction to evaluate the morphology, the structure and finally the powder particles sizes. The powders were cold compacted and sintered and then characterized. The composites were successfully produced using powder metallurgy techniques.
Plenary
10/1/19, 8:35 AM - 10/1/19, 9:00 AM
Presenter(s): andrea pezza (primetals technologies germany gmbh), willi anton buehler (primetals technologies germany gmbh), EDILSON MARANHAO (PRIMETALS TECHNOLOGIES GERMANY GMBH)
Abstract:
O processo de vácuo é a solução típica aplicada quando é hora de atualizar o nível de qualidade do aço de uma aciaria existente. A instalação do novo RH de 150t na planta integrada no México e do novo Tanque de Desgaseificação à Vácuo (VD) de 135t no Canadá para a produção de tubos de alta qualidade na América do Norte é um exemplo típico disso. A nova instalação inclui o mais recente conceito de design para este tipo de equipamento: operações totalmente automatizadas e menor impacto ambiental são os principais aspectos do projeto. A solução de bomba mecânica a seco continua sendo a melhor abordagem de investimento e custo operacional para a tecnologia de vácuo. Os principais aspectos do design da planta são descritos neste documento. O desgaseificador a vácuo RH que será abordado nesse trabalho é responsável pela melhoria das performances metalúrgicas, especialmente em termos de nitrogênio, remoção de hidrogênio e nível de pureza do aço. O processo a jusante e os resultados estão estritamente ligados aos desempenhos do desgaseificador a vácuo. O monitoramento de processos através da linha completa é uma prática padrão para obter uma melhoria efetiva da qualidade do produto. Os desempenhos metalúrgicos do desgaseificador a vácuo são analisados e comentados neste trabalho
Plenary
10/1/19, 8:35 AM - 10/1/19, 9:00 AM
Presenter(s): Celso Dias Barao (Barão Consultoria)
Abstract:
The EOF is a basic oxygen furnace characterized by the concept of preheating of the solid charge based on the energy of the previous heat. Even with a supervisory system, the operation was manual. The work consisted in the development and implantation of mathematical models of blowing, aiming to reach the temperature and chemical composition programmed for tapping. The system of equations considers all the metallic charges with that respective chemical compositions and it defines the amount of energetic or cooling, besides the quantity of limes according to the basicity and MgO content objectified in the slag. Initially, the development went to knowledge of the process, given the excellence and originality of the EOF furnace, which is different of others BOF. Next, standards and operational practices were defined that guaranteed the reproducibility of the process, to finally allow the calculation through mathematical models. After process automation the significant gains in productivity, reduction in material consumption, increase in metal yield and lower consumption of refractories were achieved.
Plenary
10/1/19, 8:35 AM - 10/1/19, 9:00 AM
Presenter(s): iara patricia vieira de oliveira (UNIVERSIDADE FEDERAL DE OURO PRETO), Guilherme liziero ruggio da silva (gerdau- usina ouro branco), Lorena cristina amorim moura (UNIVERSIDADE FEDERAL DE OURO PRETO), paulo santos assis (universidade federal de ouro preto), João Ricardo Denicolo Braga (UNIVERSIDADE FEDERAL DE OURO PRETO)
Abstract:
The coke is exposed to different mechanical demands of the type impact, abrasion and compression, from the dewatering to its consumption in the blast furnace. To prevent coke from undergoing severe degradation it is required that it has a high mechanical strength. In order to monitor this parameter, the drum test is used mainly, but only the degradation by impact and abrasion. In this context, this work developed a methodology to evaluate the mechanical resistance to compression, initially in individual coke particles, pointing out the most resistant granulometry. The cokes were transformed into test bodies and tested on a universal testing machine. The results indicate that the average tensile stress increases with increasing particle size. Later, the mechanical resistance to compression in coke bed was evaluated, it was possible to simulate in a hydraulic press the pressure that the column of the loads exerts on the coke bed in the Blast Furnace and later correlated the compression with index drum and obtained excellent results.
Plenary
10/1/19, 8:35 AM - 10/1/19, 9:00 AM
Presenter(s): Rodolfo Arnaldo Montecinos de Almeida (Lasid - ufrgs)
Abstract:
The research in steel dephosphorization were driven by the increasing demand for high-quality steel with fewer impurities. One of these impurities is the phosphorus. It is an undesirable element in steel, because of its deleterious effect in steel properties. In the last decades, researchers have studied dephosphorization to deduce expressions based in chemical composition and temperature. These expressions, deduced using equilibrium data, did not achieved a good correlation with industrial data. All expression can be written as a sum of a basicity term, an oxygen potential term, a temperature term and a constant of adjustment. This paper aims to create a new expression using, industrial data (slag and steel) and the results obtained by the thermodynamic program FactSage v. 7.2 to achieve a better correlation. The results given by FactSage were the Lp and viscosity of the slag, they were considered as an equilibrium term and kinetic term, resulting in another expression. Besides that, the expression will be tested using another group of industrial data. As a result, the new model had a good correlation with the industrial data R2=0.89, and with the second industrial data, R2 = 0.83. This fact evidences the importance of scrap load in dephosphorization.
Plenary
10/1/19, 8:35 AM - 10/1/19, 9:00 AM
Presenter(s): gerson evaristo de paula júnior (usiminas), beatriz fausta gandra (usiminas), daniel andrade paes de lima (usiminas)
Abstract:
The gradual reduction of the sinter feed size has been a complicating factor in the maintenance of sintering productivity. In addition, pellet feeds have been used for chemical correction. Because of this, it is necessary an effective cold agglomeration step in sintering to keep the ironmaking competitiveness. Thus, in the present paper, four different technological routes for cold agglomeration with sinter feeds (drum mixer, intensive mixer + drum, double drum and HPS - Hybrid Pelletized Sinter) were evaluated in pilot scale and their impacts on the indicators of the sintering and the sinter quality was obtained. It was found that the best results on granulation index and, consequently, productivity were obtained in the route using HPS. However, the sinter from this process was the most fragile among the analyzed ones. The performance of the double drum process was superior to the intensive mixer from the point of view of productivity and sinter quality.
Plenary
10/1/19, 8:35 AM - 10/1/19, 9:00 AM
Presenter(s): jose caetano neto (anglo american)
Abstract:
The purpose of this paper is to demonstrate the importance of statistical analysis of mine clearance data for the correct understanding of the performance of trucks and their operators, identifying any systemic anomaly that may be amenable to improvement and cost reduction.
Plenary
10/1/19, 8:35 AM - 10/1/19, 9:00 AM
Presenter(s): luciana pereira alves (LTM/UFRJ), Luís marcelo Tavares (LTM/UFRJ), Henrique Dias Gatti Turrer (Anglo American), Carlos Magno Nascimento (Anglo American), José Francisco Cabello Russo (Anglo American)
Abstract:
Desliming is a method of classifying mineral particles, which aims at removal of slimes so as to prepare the slurry to downstream concentration processes. It is a common item in mineral processing flowsheets, being mostly carried out in hydrocyclones, in which separation is result of complex fluid flow and its interaction with the mineral particles. When dealing with particles contained in size ranges relevant to desliming, the challenge in describing the process is even greater. The work deals with the fitting of the Narasimha-Mainza model of classification in hydrocyclones to data from desliming an itabirite iron ore, for prediction of feed slurry flowrate, corrected cut size and short-circuit to the underflow. As such, tests were conducted at both pilot and industrial plants in KREBS 2.7” and 4” cyclones operating under a variety of conditions. In the validation of the model, deviations between the predicted and measured values were lower than 34% for feed slurry flowrate, less than 22% for corrected cut size and less than 18% for short-circuit for underflow.
Plenary
10/1/19, 8:35 AM - 10/1/19, 9:00 AM
Presenter(s): Marlon Galileu Rizzo (IFES - VITORIA)
Abstract:
Flexible Pipe Manufacturing Processes are increasingly being subjected to the need to improve the resilience of materials, due to the higher depth of oil exploration. Among these materials is the steel strip responsible for manufacturing the first layer of the flexible pipe, called by the carcass, which is liable for withstanding the internal pressure of the product passing through the inner of the pipe. Currently, steel strips with bigger size are being used in the Duplex material. The mechanical and microstructural characteristics were evaluated. This work aims at modelling of a mechanical forming process of Duplex and SuperDuplex stainless steel strips through Computational Simulation Software (ANSYS LS-Dyna and ABAQUS) in order to perform explicit dynamic analyzes in which the material, in which the material supports higher efforts in a short period of time. The Explicit Computational Simulation was made associated with an industrial case, obtaining a simulation compatible with the real process, being possible to validate the model. Finally, after the validation of the model, a computational analysis was done between the Duplex and Super Duplex materials, in which it was possible to detect some places of the strip with greater stresses.
Plenary
10/1/19, 8:35 AM - 10/1/19, 9:00 AM
Presenter(s): aline lima da silva (universidade federal de minas gerais), Julio Aníbal Morales Pereira (universidade federal do rio grande do sul), nestor cezar heck (universidade federal do rio grande do sul)
Abstract:
In the production of several types of steel the control of composition, size and distribution of the non-metallic inclusions is of fundamental importance, not only for the steel products quality, but also for the guarantee of continuity in the steel manufacturing process. The control of inclusions composition is an issue that can be adequately analyzed with the use of a ‘computational thermodynamics’ tool, providing the steelmaker with vital information for process adjustments. In this study, with the help of thermodynamic calculations, special phase diagrams were constructed using FactSage software and its databases. Especially the influences of Al and Ti on the composition of the inclusions were analyzed, taking into account the total oxygen content. Moreover, two methodologies (static and dynamic) were used to understand the important phenomenon of reoxidation. In addition to helping steelmaking engineers to understand this type of analysis, the results of this work should be motivating for students in this area of engineering to engage themselves with the so called ‘computer thermodynamics’.
Plenary
10/1/19, 8:35 AM - 10/1/19, 9:00 AM
Presenter(s): manoel alves da costa junior (ARCELORMITTAL - SAO FRANCISCO), EDSON DA SILVA FARIAS (ARCELORMITTAL - SAO FRANCISCO)
Abstract:
How smart is your PPE system? CONSIDERING THE INDUSTRY CHALLENGES, WE NEED To improve accuracy, higher efficiency, cost saving and better user experience, through an integrated platform and 100% digital process, from user request to PPE delivery.
Opening Ceremony ABM WEEK 2019
10/1/19, 8:35 AM - 10/1/19, 12:45 PM
Presenter(s): APERAM; ARCELORMITTAL; GERDAU; TERNIUM; USIMINAS;
Abstract:
Plenary
10/1/19, 9:00 AM - 10/1/19, 9:25 AM
Presenter(s): beatriz fausta gandra (usiminas), Larissa Rodrigues de Carvalho Rocha (usiminas), Mauro Vivaldino Fernandes (usiminas)
Abstract:
Reducing gas' chemical composition affects significantly its diffusivity through the bed and the ability to reduce the metallic burden. Moreover, the economic and environmental scenario demands increasingly productivity of blast furnaces, with low fuel rate and lower CO2 emissions. Therefore, companies have pursued a high coal injection rate and, in cases of favorable policy, intensify the natural gas use. In these cases, the amount of material reduced via H2 as compared to CO is increased. In the present paper, the results of softening and melting (S&M) of two types of NPO, one kind of pellet and industrial sinter are presented, using as reductant gas with different content of H2 (0% to 12% ). It was found that, for the NPO, there is no definite trend. Although higher hydrogen content could favor the reduction, this did not reflect in better bed permeability. In the pellet case, there was a slight tendency of improvement in the evaluated parameters when the gas richest in hydrogen was used. However, its performance in S&M was less than expected, since it presented high resistance to permeability associated with low reducibility until the softening. For sinter, was identified a clear improvement in reduction and bed permeability aspects.
Plenary
10/1/19, 9:00 AM - 10/1/19, 9:25 AM
Presenter(s): JHOAN SEBASTIAN GUZMán hernández (Escola Politécnica da Universidade de São Paulo)
Abstract:
Additive manufacturing (AM) new technologies are being widely applied for the fabrication of materials in different areas. For metallic materials, powder bed fusion technologies, including selective laser melting (SLM), are the most used. Due to its high flowability, it is common that the used raw material is spherical powder and not irregular powder. However, the production process of spherical powders is expensive. The Ti53Nb alloy is extensively employed on the fabrication of superconducting materials. Moreover, its high biocompatibility and low elastic modulus present a great potential for the fabrication of medical implants through SLM process. This work aims to compare SLM manufactured samples fabricated with spherical and irregular powders of the Ti53Nb alloy, by using the same parameters of power and scanning speed of the laser and different levels of oxygen inside the chamber of fabrication. To that end, measurements of density, hardness, oxygen and nitrogen of the samples were taken. It was also made a comparation among the different microstructures obtained on the process. It was found that the parameters to obtain fully dense samples depend on the powder’s morphologies and is possible to achieve high values of density, even with high values of oxygen.
Plenary
10/1/19, 9:00 AM - 10/1/19, 9:25 AM
Presenter(s): THIAGO ALMEIDA CUNHA (puc-rio)
Abstract:
The present work discusses several methodologies to proper align experimental assemblies for mechanical tests on servohydraulic machines. Consequences of neglecting proper alignment are shown, and some procedures to mitigate subsequent damages are discussed. In addition, some manufacturing tips are addressed for the adaptation parts that allow the assembly of equipment not originally designed for the machine to be used.
Plenary
10/1/19, 9:00 AM - 10/1/19, 9:25 AM
Presenter(s): SUZANA BARRETO NORONHA RIBEIRO (Instituto Militar de Engenharia), Iago José Vitral Rezende Lopes (Instituto Militar de engenharia), Wendell Bruno almeida bezerra (instituto militar de engenharia), Valdir Florencio da Veiga Junior (Instituto militar de engenharia), marcelo henrique prado da silva (instituto militar de engenharia)
Abstract:
Synthetic hydroxyapatites are currently a potential alternative for bone regeneration, reconstitution and reintegration. This work proposed the addition of two different percentages of silica from the freshwater sponge from the Amazon region to hydroxyapatite. The sponges were calcined and the silica powders obtained were added to the hydroxyapatite and were pressed to produce pellets. The pellets were sintered and characterized by scanning electron microscopy (SEM), X-ray diffraction (EDS) spectroscopy, X-ray diffraction (XRD). The results showed the occurrence of partial substitution and degradation in biologically more stable phases favoring the process of reabsorption and growth in biological medium.
Plenary
10/1/19, 9:00 AM - 10/1/19, 9:25 AM
Presenter(s): LUIZA BRAGA FERREIRA DOS SANTOS (instituto militar de engenharia), Francielly Moura de Souza Soares (INSTITUTO MILITAR DE ENGENHARIA), Emília dos Santos Monteiro (INSTITUTO MILITAR DE ENGENHARIA), Paula Anastácia Moraes Cairo Gomes (INSTITUTO MILITAR DE ENGENHARIA), Maria Elisa Rodrigues Coimbra (INSTITUTO MILITAR DE ENGENHARIA), Carlos Nelson Elias (INSTITUTO MILITAR DE ENGENHARIA)
Abstract:
The search for synthetic materials that mimic tissues and organs or even, helps restore their functionalities, makes the number of publications involving biomaterials grow considerably. Numerous diseases result in the need for restoration of bone tissue and thus, the use of a bone graft that suffers from some limitations. Composites development has been an alternative to combine different material properties, enhancing their applications. The study goal was to synthesize composites of PNIPAAm and nanoparticle of hydroxyapatite, combining the properties of an injectable hydrogel with an osteoconductive ceramic; using a new route of synthesis and investigating how the crosslinking agent concentration, in this case MBA, could affect the morphology and characteristics of a series of hydrogels and composites. The characterization techniques used were IR, SEM and TGA. It was observed that the crosslinking agent concentration directly affected the morphology of all the obtained compounds, in which the number of cavities presented on the hydrogel structure increased joint with the concentration of MBA used in the synthesis process; this concentration variation also influenced on amount of nanohydroxyapatite adhered in the polymer matrix. The obtained composites presented characteristics favorable to the potential application as a bone graft.
Plenary
10/1/19, 9:00 AM - 10/1/19, 9:25 AM
Presenter(s): Marina braga campos (gerdau), johne jesus mol peixoto (ufop), carlos antonio da silva (ufop), itavahn alves da silva (ufop)
Abstract:
Inclusions size distribution, morphology and composition play a remarkable role on steel quality because they strongly influence the chemical and physical properties of the steel such as fatigue, machinability and corrosion resistance. Therefore, in order to improve the quality of the steel, it is necessary to increase the cleanliness of the liquid steel [1]. For that purpose, processes (with different operating costs) are used, such as the bubbling of inert gas in the ladle and its treatment in the RH vacuum degasser. This work presents results from mathematical simulations as well as from industrial trials regarding of removal of inclusions through a rinsing station and RH degasser. A comparison is made confirming the RH superiority.
Plenary
10/1/19, 9:00 AM - 10/1/19, 9:25 AM
Presenter(s): Gabriele paulon (danieli), Loris Busolini (danieli automation), Thierry Gautreau (Danieli Rotelec), Herbert Moser (voestalpine Stahl GmbH), Peter Hodnik (voestalpine Stahl GmbH)
Abstract:
At voestalpine Stahl, Linz a new conventional slab caster has been installed to produce mainly automotive and electrical applications grades, implementing the latest design solutions: tight pitch roll geometry, mould and strand stirring and braking devices, SEN water modelling validation, enhanced roll cooling design to allow dry casting conditions, finely defined slab cooling system layout to control slab surface temperature across the width. To control these design solutions the latest generation of technological packages has been implemented like detailed solidification model based on meshless computational algorithm and a fully dynamic application of soft reduction to achieve sound internal quality results.
Plenary
10/1/19, 9:00 AM - 10/1/19, 9:25 AM
Presenter(s): ana christina pitard lima (ternium)
Abstract:
The analysis in a coal blend is of great meaning to the cost reduction and quality control in a coke plant, this article intend to discuss the influence of common crushing in coal of different ranks, as their implications in the sampling and sequent analysis.The coal blending process at Ternium Brasil had a gap between the volatile matter analised from the blended coal automatic sampler and the volatile matter calculated from the proporcional avarage of the individual coals, for such were studied all the stages of the blend production process, from the natural difference in the stack, to the hopper flow until the prior and posterior crushing system. The data was analysed and na action plan was made to reduce the gap.
Plenary
10/1/19, 9:00 AM - 10/1/19, 9:25 AM
Presenter(s): andrea gomba (danieli), marco ansoldi (danieli), damiano patrizio (danieli), manuele piazza (danieli), Paulo Da Costa (danieli), Orhan Kuran (Kroman Celik San. A.Ş.)
Abstract:
The present work analyzes the results achieved in Kroman Celik EAF one year after the installation of the Q-MELT Automatic EAF system and the revamping of the furnace chemical package. The main features of the system, such as electrode regulation and foamy slag control, charging optimization, off-gas analysis and closed loop injectors control are summarized. Further improvements have been achieved with the fine tuning of the melting practices, which allowed to progressively reduce the electrical energy consumption. The effect of oxygen dedicated to post combustion is analyzed in terms of electrical energy savings. In addition, slag sampling has been increased to improve the slag builder’s recipe and to reduce the variability of the main chemical compounds. The initial results achieved after the first months of installation were confirmed and improved during (year) 2018. The system showed how its adaptive characteristics changed dynamically the input process parameters according to the variability of the different parameters measured, such as charge mix, off-gas analysis, arc coverage index, etc.
Plenary
10/1/19, 9:00 AM - 10/1/19, 9:25 AM
Presenter(s): rogerio sendela (vale moçambique), leonardo xerinda (vale moçambique), andre vilanculos (vale moçambique), anivaldo chevane (vale moçambique)
Abstract:
Moatize Coal Mine is located in Tete Province, in centre of Mozambique. The deposit contains Gondwana allochthonous coals, and has a large amount of mudstone and siltstone banding. Phosphorus levels in the coal can be high which impacts the use of the coals in steel making where phosphorus is considered a contaminant. The Chipanga seam in the Moatize deposit shows considerable variability, vertically within the seam and laterally across the deposit. The data available from the exploration work indicates that the phosphorus is predominantly present as Apatite but the Crandallite minerals also are significant.
Plenary
10/1/19, 9:00 AM - 10/1/19, 9:25 AM
Presenter(s): NEYMAYER PEREIRA LIMA (VALE S.A.)
Abstract:
flotation is the main concentration process, has been applied with sucess for the removal of quartz on the iron ore industry aiming high quality concentrates. limiting the top size close to 0,300mm and the removal of slimes are fundamental for the efficiency of reverse flotation of quartz. The high consumption of reagents, leading to insufficient particle coverage, and increased foam stability, leading to the difficulty of removal of quartz particles, are the main deleterious effects of the presence of slimes. Recent characterization studies, together with the development of new collector of linear chain, allowed the obtaining of concentrate with SiO2 contents close to 3% with 94% of metallurgical recovery, based on pilot tests carried out on a sample flotation column of the Quadrilátero Ferrífero.
Plenary
10/1/19, 9:00 AM - 10/1/19, 9:25 AM
Presenter(s): MATEUS BOTANI DE Souza Dias (Departamento de Engenharia Metalúrgica e de Materiais - Escola politécnica da USP), David Pasello de Mendonça Bentancour (DEPARTAMENTO DE ENGENHARIA METALÚRGICA E DE MATERIAIS - ESCOLA POLITÉCNICA DA USP), Ramon Valls Martin (CTMetro - Centro de Metrologia Mecânica, Elétrica e de Fluidos, Instituto de Pesquisas Tecnológicas do Estado de São Paulo), Fernando José Gomes Landgraf (DEPARTAMENTO DE ENGENHARIA METALÚRGICA E DE MATERIAIS - ESCOLA POLITÉCNICA DA USP)
Abstract:
Economic growth of a country is related to its energy consumption. Therefore, it is important to find alternatives to reduce the electric energy waste in power grid. During the assembly and operation of transformers used to regulate the voltage at power grid, compressive stresses are applied at magnetic core sheets, increasing the losses and magnetostriction. As consequence, beyond the performance decreases, the transformer noise emission will increase. The present work investigates the effects of annealing under stress (TTT), 500°C, 300 N and 1200 s, on hysteresis loops (power loss) and magnetostriction of a grain oriented electrical steel submitted to compressive stresses. When compared with “as received sample”, the TTT reduced the power loss by -10%, -17%, -14%, -10%, -10% and -7% for the compressive stresses of 0, 2, 4, 6, 8 and 10 MPa at 0.7 T. However, the TTT had no influence at power loss for the test performed at 1.7 T. Regarding the magnetostriction, the reductions after the TTT, for the stresses of 0, 2, 4, 6, 8 and 10 MPa, were -6%, -49%, -49%, -16%, -22% and -12% (0.7 T) and -6%, -10%, -38%, -12%, -4% e 5% (1.7 T). In summary, the TTT is efficient to reduce the deleterious effects of compressive stresses, reducing the power loss and magnetostriction. Thus, this treatment could produce more efficient and quiet transformers.
Plenary
10/1/19, 9:00 AM - 10/1/19, 9:25 AM
Presenter(s): ADRIANE LOPES MOUGO (CEFET/RJ - UNED NOVA IGUAÇU), Luísa de Amorim Makhoul Gomes (CEFET/RJ - UNED NOVA IGUAÇU)
Abstract:
The friction thats happens through the chip-tool contact can be determinant for the increase of the cutting forces during the machining process. If this friction is significant, the movement of the chip on the output surface of the tool can accelerate crater wear and this reduce the life tool. Thus, the aim of this research paper is to study the frition in the second shear zone by measuring the cutting forces during the turning process of the stainless steels UNS S 32760, AISI 316 and AISI 410 and after using these forces in the Mechant model to determine and compare the coeficiente of friction of these three materials. The variable parameters are the feed rate of the tool and the cutting speed. The depth of cut was kept constant and during this process, no cutting fluid was used.
Plenary
10/1/19, 9:00 AM - 10/1/19, 9:25 AM
Presenter(s): AUGUSTO LACHINI PEREIRA (UFRGS - Lasid)
Abstract:
A minor change in the chemical composition and temperature affects the slag viscosity, which has a great extent of the physical properties in regarding refining slags. Optimizing those parameters may affect the steel cleanliness. The viscosity measurement process is considered expensive, so the cost-effectiveness does not favor the measures at high-temperatures. Alternatively, it is possible to apply mathematical models or thermodynamic softwares to obtain viscosities for a given range of chemical composition and temperature of slags. The present work contemplates a validation of the experimental data, collected in the literature, with a calculated data and proposes an accurate representation of iso-viscosity curves applied for secondary steelmaking slags, covering the composition ranges: 0–100 wt.% CaO, 0–80 wt.% SiO2, 0–77 wt.% Al2O3 and 0–15 wt.% MgO (CSAM) system at 1500ºC. The viscosity representation fields include fully liquid and a partially liquid slags in the CSAM system and the viscosities were calculated using the FactSage 7.2 (for Liquid Phase) and the Roscoe-Einstein equation (for Phase mixture) for a total of 5976 slags. The preliminary results indicated that there is a great convergence between the calculated and experimental viscosities data, promoting an efficient approximation of the iso-viscosity curves for the CSAM slag system in the high-temperatures.
Plenary
10/1/19, 9:00 AM - 10/1/19, 9:25 AM
Presenter(s): Pedro Dornas Cipriani (Autônomo)
Abstract:
This paper aims to present the technology of the Laboratory Information Management System, its benefits and the risks involved in an implementation project. LIMSs have been in existence for more than twenty years but are still difficult to implement successfully. This document will provide a brief introduction to LIMSs followed by a description of some of the technologies available to users today. LIMS projects will rarely fail due to technical constraints, but human inadequacies. The paper will outline some of the pitfalls of implementing LIMS and some of the most likely causes of a LIMS project to fail. It will then give a generalized approach to the development of a successful implementation of LIMS and finally a look at the future addressing some of the LIMS industry needs
Plenary
10/1/19, 9:00 AM - 10/3/19, 9:25 AM
Presenter(s): luiz henrique Curado ribeiro (TERNIUM Brasil)
Abstract:
With the deterioration of the quality of the iron ore, the new conditions of quality of the raw materials (mainly sinter feed) were adapted to their processes, resulting in the need for changes in the chemical quality of the sinter for blast furnaces in the Ternium Brazil, without changing the parameters of chemical, physical and metallurgical quality. Due to the change in this scenario, there was a great impact on the quality of the fine iron ore this year in 2019, due to which the work ranges of sinter MgO and B2 were currently modified to minimize these impacts in the blast furnaces of Ternium Brazil. This work aims to minimize the effects of the sinter worsening, with the reduction of the sinter MgO and B2 bands, with an increase of 2% in the mixture yield and FeT elevation in the range of 1.6% in the sinter product
Plenary
10/1/19, 9:25 AM - 10/1/19, 9:50 AM
Presenter(s): alexandre patricio vieira da silveira (ternium brasil)
Abstract:
The TERNIUM Brasil, Rio de Janeiro, has two Blast Furnaces. Both started the operation in 2010, Blast Furnace#01 in 13/07/2010 and Blast Furnace#02 in 06/12/2010. In December 2016 and January 2017, there was a high temperature blow-off, causing emergency stops in the Furnaces.In view of this problem anticipating possible failures in the high temperature blow assembly is fundamental to ensure stable blast furnace operation. Analyzing the process, checking procedures, researching and applying new materials to suit operational conditions is essential to avoid high temperature blow-up and high life
Plenary
10/1/19, 9:25 AM - 10/1/19, 9:50 AM
Presenter(s): LUARA DA COSTA MORAIS (Poli-usp), Flavio beneduce (Poli-usp), rodrigo magnabosco (centro universitário fei), tiago ramos ribeiro (instituto de pesquisas tecnológicas)
Abstract:
The main purpose for this work is to analyse the effect of NbC grain size in the liquid-phase sintering process by computational simulation in DICTRA®. Morphological analysis by SEM and particle size distribution by laser granulometry were performed, and the results showed that there are NbC agglomerates of different sizes. Three different sizes of NbC according to particle size curve analysis. Liquid-phase sintering was simulated at 1420 °C considering a model with NbC and 12v%Ni, and the model with particles with radius of 0,35 μm showed total dissolution of NbC indicating that Nb and C in liquid phase came from carbide dissolution, and they are available to grain growth of the larger carbide particles.
Plenary
10/1/19, 9:25 AM - 10/1/19, 9:50 AM
Presenter(s): fabiano candido santana (Arcelormittal Tubarão)
Abstract:
In the current economic scenario, companies are looking to become more competitive, reducing operating costs and unplanned downtime. The biggest challenge for people who are involved in maintenance in today's industries is not just knowing the techniques used in maintenance but deciding which ones are really important for a better asset life cycle. The maintenance stops of large industrial units are periodic events and aim at the reconditioning of equipment, systems and facilities, at an adequate level of reliability, so that production is guaranteed without problems during the next operational campaign. The objective of this work is to create a "live" model that allows to optimize the intervals between stops, from simulations for a certain time of operation to different scenarios of improvement, changes of strategies and extensions, through quantitative methodologies of reliability engineering leading taking into account the cost, risk and performance.
Plenary
10/1/19, 9:25 AM - 10/1/19, 9:50 AM
Presenter(s): Isadora conceição gonçalves (Instituto Militar De Engenharia (IME))
Abstract:
Thorium ferrite nanoparticles (ThFe2O4) were synthesized by the combustion method with glycine/nitrate ratios N/G = 1 and 2. The samples were characterized by Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (DRX). The results showed that the method yields nanometric sized particles of ThFe2O4. A vibration band of the octahedral site of Th-O at 547,7 cm-1 was found in the sample produced with G/N = 2, indicating a probable spinel-type ferrite phase.
Plenary
10/1/19, 9:25 AM - 10/1/19, 9:50 AM
Presenter(s): iris sterfanie santos (ufs), Eliana Midori Sussuchi (Universidade Federal de Sergipe), Maxwell Paca Matos (Universidade Federal de Sergipe), Regina Helena Marino (Universidade Federal de Sergipe), Sandro Griza (Universidade Federal de Sergipe)
Abstract:
Recurring concerns about the environment and future generations are driving technology and science to seek sustainable measures, ensuring a balance between society-economy and nature. The use of the mycelium as an alternative for polymer replacement is on the rise in the biotechnology industry. The biocomposite was composed of a fungal matrix of white rot (P. sanguineus) and vegetable substrate (coconut powder and wheat bran), inoculated for 13 days and submitted to a temperature of 50, 60 and 70ºC during drying at 48 hours. The results indicate reduction of the compressive strength, density and loss of mass and volume with the increase of temperature. A biocomposite with competitive and foam-like properties is possible to be developed, paying attention to the connection of the mycelial network to the substrate and to the behavior of the mycelial film formed in the inoculation phase
Plenary
10/1/19, 9:25 AM - 10/1/19, 9:50 AM
Presenter(s): willian facundes (usiminas)
Abstract:
Increasing demand for low sulfur steels has led some steelmakers to study ways to optimize desulphurisation treatment in steel to reduce the consumption of desulphurizing agents, sulfur content and treatment time in secondary refining. In this paper, the evolution of sulfur during the desulphurisation of steel in the ladle furnace was analyzed in 30 experimental heats using a micropulverized mixture containing lime and fluorite. After evaluating the results and the thermodynamic and kinetic conditions, equations were developed to predict the mixture weight to be injected to obtain the target sulfur content. The optimization of the process resulted in the reduction of 1.1 kg/t micropulverized mixture, 0.22 kg/t of aluminum, 562 kW of energy, 5,4 kg electrode/heat and 2 minutes of treatment.
Plenary
10/1/19, 9:25 AM - 10/1/19, 9:50 AM
Presenter(s): BRENO TOTTI MAIA (LUMAR METALURGICA LTDA)
Abstract:
The EOF reactor was developed in Brazil in the eighties with unique features. The preheating of scrap and distribution of injection points oxidizing gases and fuels make up these features. A dynamic and versatile reactor able to support big variations between scrap and hot metal charged, by the way with same devices to inject oxygen since when technology start up. This papers aims to show stage 1 of plan sequence of 3 stages of developments that look for increase EOF productivity. In this stage 1 are presented gains related of change number of points to inject oxygen and adaptation of this points for supersonic blow conditions
Plenary
10/1/19, 9:25 AM - 10/1/19, 9:50 AM
Presenter(s): LEONARDO BARBOSA DE OLIVEIRA MELLO (ARCELORMITTAL TUBARÃO), Odilon José da Silva (ARCELORMITTAL TUBARÃO), Alexandre Santos Tardin (ARCELORMITTAL TUBARÃO), Marcelo Tardin Alves (ARCELORMITTAL TUBARÃO), Filipe Sathler (ARCELORMITTAL TUBARÃO), João José dos Santos Carvalho (ARCELORMITTAL TUBARÃO), Leonardo Passos Perdigão (ARCELORMITTAL TUBARÃO), Daniel Paulo Santos (ARCELORMITTAL TUBARÃO)
Abstract:
The operational stability of the blast furnace depends on the quality of its raw materials, and the Coke Strenght after Reaction (CSR) is one of the main coke quality control parameters to verify the granulometric degradation of the coke after its reaction with CO2. The challenge for steel companies is to produce low-cost, high-quality coke with accurate and consistent results to meet the specifications required by the blast furnace. In this work, using a Six Sigma methodology, a mathematical equation (multi variable linear regression model) was developed and validated to predict the CSR produced by the ArcelorMittal Tubarão coke plant, based on statistical data correlated to the parameters of the coal blend (ash and sulfur contents and ash chemistry expressed by the basicity index).
Plenary
10/1/19, 9:25 AM - 10/1/19, 9:50 AM
Presenter(s): Doug zuliani (tenova goodfellow inc.), armando vazquez (tenova goodfellow inc.)
Abstract:
Tenova’s Intelligent EAF technology (i EAF®) provides a multistep roadmap for continuous improvement, cost saving and increased safety. A full i EAF®’ System is a combination of real-time measurements, using state-of-the-art technology and robust process models, including a precise real-time mass & energy balance; with the objectives to reduces operating costs while increasing yield & productivity; The i EAF® also represents a powerful, stable and robust process control engine for EAF Level 2 automation and it could be enhanced with the industry’s most comprehensive water leak detection using both H2 & H2O vapor analysis.
Plenary
10/1/19, 9:25 AM - 10/1/19, 9:50 AM
Presenter(s): BRUNO MYNELLY GALDINO DE SOUSA (POLIMATEC), ANTONIO AUGUSTO DE MORAIS PIAU (PHOENIX DO PECÉM), miguel araujo de vasconcelos filho (companhia siderúrgica do pecém)
Abstract:
SLUDGES AND DUSTS GENERATED BY STEEL MILLS USUALLY CAUSE ENVIRONMENTAL PROBLEMS AND HAS A HIGH COST SOLUTION. THIS PRESENTATION OFFERS A DIFFERENT APROACH TO THE PROBLEM WITH A SOLUTION THAT NOT ONLY SOLVES THE ENVIROMENTAL ISSUE BUT ALSO BRINGS GREAT SAVINGS TO THE MILL. THIS TECHNOLOGY, REUSES DUSTS AND SLUDGES IN THE SINTERING PROCESS, AFTER THEY ARE MIXED TO THE RIGHT COMPOSITION.
Plenary
10/1/19, 9:25 AM - 10/1/19, 9:50 AM
Presenter(s): JORGE LUIZ VALENCA MARIZ (UFRGS), Raíza da Silva Juvenal (UFPE), suelen silva rocha (ufpe), artur ângelo alcântara de assis (ufpe), júlio césar de souza (ufpe)
Abstract:
Um estudo de viabilidade econômica deve considerar parâmetros e incertezas inerentes a um projeto para produzir resultados econômicos consistentes, fornecendo ao investidor uma ferramenta de tomada de decisão. O presente estudo objetivou efetuar inicialmente a avaliação econômica convencional do cenário realista de uma mineração de agregados em fase de implantação localizada em Pernambuco, cujo Valor Presente Líquido (VPL) obtido foi R$ 24.006.309,20, o que representa um resultado positivo. Através da metodologia de Monte Carlo foi efetuada uma análise de risco considerando incertezas em 100.000 cenários, nos quais nove variáveis assumiram valores estocásticos dentro dos domínios definidos, produzindo assim uma distribuição estatística do VPL ao invés de um único número, sendo ainda efetuada uma análise de sensibilidade para identificar e quantificar as variáveis que mais impactam no resultado da avaliação. Por fim, os dois fatores mais influentes identificados na análise de sensibilidade inicial foram isolados e submetidos a uma nova análise de risco em outros 100.000 cenários. Foi concluído que o projeto é economicamente viável e que a probabilidade de gerar lucro aos investidores é de 99,77%, embora a probabilidade do VPL ser igual ou maior que o previsto pelo método convencional seja de 49,98%.
Plenary
10/1/19, 9:25 AM - 10/1/19, 9:50 AM
Presenter(s): EVANDRO costa e silva (vALE)
Abstract:
The disposal of coal tailings in an economically and environmentally sustainable way can be considered one of the biggest challenges for coal producers due to their physical, chemical and mineralogical characteristics and the significant annual volumes generated. The processing and utilization of coal fines is recognized as one of the great technical challenges of this industry. These challenges become even greater when it comes to the use of tailings from coking coals. This is due to the potential changes in their various properties, variability of these characteristics along the deposits, the handling and dewatering aspects of the products and the granulometric restrictions imposed by the coking plants for the coals to be handling and coking. This work presents the current stage of project development for the use of a metallurgical coal fines dam, addressing the general concept of the project, the exploratory sampling program and the characterization of the tailings for process and product development purposes after processing. It aims at the characterization and the carbonization tests for product development, the mining method considered, product alternatives, suitable to the market, to be generated and the next steps.
Plenary
10/1/19, 9:25 AM - 10/1/19, 9:50 AM
Presenter(s): Matheus Pereira Ribeiro (IME - Instituto Militar de Engenharia), Sérgio neves monteiro (IME - INSTITUTO MILITAR DE ENGENHARIA), fabio da costa garcia filho (IME - INSTITUTO MILITAR DE ENGENHARIA), fernanda santos luz (IME - INSTITUTO MILITAR DE ENGENHARIA), artur camposo pereira (IME - INSTITUTO MILITAR DE ENGENHARIA)
Abstract:
Possible mechanisms responsible for the static strain aging (SSA) in type AISI 316 austenitic stainless steel were investigated. Tensile tests were interrupted for a certain determined time at different levels of pre-deformation. After reloading, peaks associated with discontinuous yielding typical of SSA were revealed. These tensile tests were conducted at temperatures in the SSA exclusive interval of 100 to 300° C for austenitic stainless steels. Results obtained in double-logarithm graphs for the variation of yielding peaks intensity (ln Δ ) versus time (ln t) allowed the calculation of an exponent n = 0,40 by the linear slope of the graphs. This relatively low value of n was attributed to the mechanism of divacancies migration to solute interstitial atoms forming pairs of vacancy together with either carbon or nitrogen in substitutional position. The further interaction of these pairs with dislocation causes the SSA yielding peaks.
Plenary
10/1/19, 9:25 AM - 10/1/19, 9:50 AM
Presenter(s): Reinaldo de almeida rodrigues (Universidade do estado do amazonas - uea), Lucas carvalho cruz (Universidade do estado do amazonas - uea), Waldeir Silva Dias (Universidade do estado do amazonas - uea), Charlon Wildson Leite Costa (Universidade do Norte - uninorte), Jhonatas Santos Morais (Universidade do Norte - uninorte)
Abstract:
Plenary
10/1/19, 9:25 AM - 10/1/19, 9:50 AM
Presenter(s): RAFAEL FIGUEIREDO GARCIA (Gerdau/ufrj)
Abstract:
Controlled cooling processes in the rebar rolling process have, as main objective, the reduction of costs in the steel used. While in the case of uncontrolled cooling, it is necessary to alloy the steel in order to meet with the specification of mechanical properties, which greatly increase the price of rebar production, in the controlled cooling process, the mechanical properties are reached with a raw material with smaller amounts of alloy, substantially reducing its cost and also meeting the standard requirements. This work aims to present an initial simulation methodology of thermal treatment using Excel with operational parameters obtained from a rolling mill to predict the yield strength of thermally treated rebar. The initial model was used to simulate the production of steel rebars with 8 mm and 10 mm in diameter. The results obtained were very similar, with a difference of only 3%.
Plenary
10/1/19, 9:25 AM - 10/1/19, 10:00 AM
Presenter(s): leticia pinho inacio mendes (gerdau - ouro branco), Bruno Antunes da Silva Carvalho (gerdau - ouro branco), Matheus Marcos Lopes Alves (gerdau-ouro branco), Marcus Vinicius Malta Conceição (gerdau - ouro branco), Fernando Albert Eleutério (gerdau-ouro branco), Rodrigo de Lima Araújo (gerdau-ouro branco), José Geraldo da Silva Moreira (gerdau-ouro branco)
Abstract:
The alarms system is an essential part to ensure operational safety. However, most of the time, when it is incorrectly implemented, difficulties can arise in identifying emergency situations due to the unbounded amount of alarms flashing simultaneously on the supervision screens. In addition, an excessive amount of alarms can lead to a stressful workplace. This paper shows a successful approach based on continuous monitoring performed by a specialist with instrumentation and process knowledge, which is considered paramount in reducing the occurrence of inappropriate alarms. For the implementation, a simple tool was developed based on the EEMUA191 Guide and ISA 18.2 showing the chosen KPI's organized in an intuitive dashboard, all being fed by an existing alarms and events database.
Plenary
10/1/19, 9:50 AM - 10/1/19, 10:15 AM
Presenter(s): Richard Harvey (Primetals Technologies Ltd)
Abstract:
The copper stave was a development of the Blast Furnace cooling system intended to utilise the high heat transfer properties of copper within a fully covered shell cooling solution. They were originally conceived as being able to provide a permanent cooling lining for use primarily in the higher heat zones of the Blast Furnace. Despite a large number of campaign successes around the world the everlasting concept has not proven universal, with some plants having suffered issues in two particular areas: stave bending (leading to water leaks at back of the stave) and stave wear (erosion on the hot face). Primetals Technologies have in the past been approached to provide assistance to a number of Blast Furnace operators who were experiencing operational issues with the copper stave furnace cooling systems of others. Through knowledge gained resolving these issues, and with the positive experiences of their own copper stave designs, Primetals Technologies have worked towards developing a new concept in copper stave design capable of providing a more robust solution to cope with the greater productivities of modern ironmaking. This paper will provide an outline to the concepts that have driven the design of this new technology.
Plenary
10/1/19, 9:50 AM - 10/1/19, 10:15 AM
Presenter(s): Vanderlei ricardo guerra (instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul - IFRS. Campus Farroupilha), Lisiane trevisan (INSTITUTO FEDERAL DE EDUCAÇÃO, CIÊNCIA E TECNOLOGIA DO RIO GRANDE DO SUL - IFRS. Campus Farroupilha)
Abstract:
The recovery of tungsten carbide is very important for the worldwide production of machining tools. The low yield in the processing of the minerals, the environmental impact of the mining and the high costs to obtain these metals justify the constant efforts towards their recovery. Most of these tools do not offer the possibility of reconditioning. This study deals with scientific productions aimed at the reprocessing of tungsten and other metals contained in the scrap of cutting tools, made of hard metal, aiming the analysis of the processes in the various recycling routes. We analyzed 40 articles and 40 patents published between 1946 and 2018, concerning the reprocessing of these metals. As a result, relevant characteristics of the studied processes are presented, allowing a quick comparative analysis between them. It is concluded that recycling is feasible because it presents several advantages in relation to the obtained raw material, but improvements are still required for large-scale reprocessing, considering aspects such as risks to the environment and cost reduction.
Plenary
10/1/19, 9:50 AM - 10/1/19, 10:15 AM
Presenter(s): jerônimo simeão júnior ()
Abstract:
This paper describes the productivity project that was carried out over three (3) years with the execution teams of a large steel industry. The goal was to change the productivity of the company's execution teams, from a worrying and discouraging number to close to the benchmark of this indicator in industries of similar size to the industry pictured here. In order to do so, more than 2 (two) thousand measurements were carried out during these years with different types of observations to guarantee the smoothness and assertiveness of the indicator and to understand the opportunities for improvement in the process. The article covers the methodology, results and information that bring to light the great result obtained by the execution teams, the main object of research of this work.
Plenary
10/1/19, 9:50 AM - 10/1/19, 10:15 AM
Presenter(s): Geovana Carla gIRONDI dELAQUA (UENF - doutoranda), Veronica quirino jardim (uenf - graduanda), carlos maurício fontes vieira (uenf - professor )
Abstract:
Industrialized component wastes, regularly discarded by the society, are increasingly contributing to environmental pollution, such as post-consumption packaging glass. A possible solution could be its incorporation into a clay body to fabricate commonly fired ceramics for civil construction. The objective of this work is to evaluate the effect of the incorporation of this waste, up to 30wt.% at different particle sizes, in technological properties of the clayey body used to fabricate bricks and roofing tiles. This glass powder was tested for optical dilatometry. Specimens were uniaxially pressed at 25 MPa and fired at 900°C. The technological properties were evaluated in terms of water absorption, linear shrinkage, and flexural rupture strength. The results indicated that waste incorporation improved both ceramic water absorption and mechanical strength. Finally, this work indicated that clay brick production is a viable and technically advantageous alternative for recycling this type of waste, also bringing real benefits to the quality of ceramics.
Plenary
10/1/19, 9:50 AM - 10/1/19, 10:15 AM
Presenter(s): MIRIANE ALEXANDRINO PINHEIRO (UFPA - UNIVERSIDADE FEDERAL DO PARÁ), edemarino araújo hildebrando (UFPA - UNIVERSIDADE FEDERAL DO PARÁ), RODOLFO MOURA DE SOUZA LIMA (UFPA - UNIVERSIDADE FEDERAL DO PARÁ), ALISSON CLAY RIOS DA SILVA (UFPA - UNIVERSIDADE FEDERAL DO PARÁ), VERÔNICA SCARPINI CANDIDO (UFPA - UNIVERSIDADE FEDERAL DO PARÁ)
Abstract:
The development of new materials, which combine good mechanical properties, low cost and sustainability has become frequent. In this context, we highlight the development of composites that use natural fibers as reinforcement. These fibers are of great environmental importance because they are biodegradable, inexpensive and found in abundance in nature, as is the case of guaruman (Ischinosiphon koern), a species native to the Amazon region, and frequently found in floodplain regions of the state of Pará. Thus, this work aims to perform a mechanical characterization of polyester matrix composites reinforced by continuous and aligned guarumã fibers. The test specimens were produced in silicone molds meeting the specifications of ASTM D638, to perform tensile strength tests. From the values obtained after the tensile test, it was observed that the addition of the guaruman fibers to the polyester matrix increased the tensile strength value, and the incorporation of 30% by volume of fiber presented the best result. Thus, the polyester matrix composites reinforced with guaruman fibers, have a great potential, when compared to composites that have other natural fibers as reinforcement. .
Plenary
10/1/19, 9:50 AM - 10/1/19, 10:15 AM
Presenter(s): MATEUS VICTOR COPPE (UFRGS)
Abstract:
The knowledge upon the chemical composition relative to the ladle treatment slag and, thereafter, of its behavior towards the desulfurization of the liquid steel is a fundamental requirement to ensure that the chemical composition of the steel is in accordance to the specified standards of the client. The objective of the present work was comparing the sulfide capacity of the ladle metallurgy slags, foreseen in the equilibrium, calculated by some models of the literature based in the optical basicity and by thermodynamics simulations with the sulfide capacity calculated taking into account the industrial data of 770 production heats of the studied steel - a mechanical construction steel SAE/AISI 1541 Modified, produced in an electric steel mill for long products. The obtained results, however, presented a weak correlation with the industrial data. Thus, it was not possible to determine a satisfactory method for calculating the sulfide capacity on the specified steel.
Plenary
10/1/19, 9:50 AM - 10/1/19, 10:15 AM
Presenter(s): DANIEL AUGUSTO GODINHO DE CARVALHO (TERNIUM BRASIL LTDA.), Herbert Castro (Ternium Brasil), Leonardo martins demuner (TERNIUM BRASIL), Marcos antonio viana Junior (TERNIUM BRASIL)
Abstract:
Intensive process and technology improvements related to the BOF converter — the key process to increase steel plant productivity and stability — have been performed at Ternium Brazil. This paper details the road map for process developments and investments in equipment technology, as well as the results achieved. The main topics of this development are the process control and optimization systems, slag forming model, oxygen blowing pattern, end-of-blow point control and slag carryover control. The outcomes of this development are improvements in the reblow rate, end-of-blow oxidation, direct tapping, slag carryover, slopping ratio, metallic yield and lining life.
Plenary
10/1/19, 9:50 AM - 10/1/19, 10:15 AM
Presenter(s): Anderson azevedo agra (laboratório de siderurgia - ufrgs), Anderson nicolodi (LABORATÓRIO DE SIDERURGIA - UFRGS), Bruno deves flores (LABORATÓRIO DE SIDERURGIA - UFRGS), jamile guarda (LABORATÓRIO DE SIDERURGIA - UFRGS), Guilherme liziero ruggio da silva (gerdau - açominas), Antonio cezar faria vilela (LABORATÓRIO DE SIDERURGIA - UFRGS), eduardo osório (LABORATÓRIO DE SIDERURGIA - UFRGS)
Abstract:
In the literature, two models of relationships between mechanical strength and microstructural parameters are described: (1) relations between average microstructural parameters and mechanical test indices; and (2) quantification of the most critical pores for mechanical strength, based on certain criteria take into account the size and shape of the pores. In this work, laboratory cokes waere produced by parent coals with large variety of properties. This cokes were characterized by the association of optical microscopy and image analysis techniques. The main models of the literature on the relationship between mechanical strength and microstructural parameters were evaluated. It has been demonstrated that none of the studied relationships can describe the mechanical behavior of cokes produced from high inert components (> 40%). From these results two new approaches have been carried out to obtain models that contemplate such cokes: (1) introduction of a new relationship between mechanical strength and microstructural parameters and (2) a new criteria for classification of regions derived from inert components such as critical to mechanical strength.
Plenary
10/1/19, 9:50 AM - 10/1/19, 10:15 AM
Presenter(s): Ádney da Silva Vieira (Heraeus Electro Nite)
Abstract:
The CoreTemp System offers a new approach of measuring the temperature in molten steel in Electric Arc Furnace (FEA) using tubular metal cable with fiber optic core to perform the temperature measurement. The CoreTemp allows effective and reliable temperature control with fast measurement, application of a man-less and without opening the FEA door, bringing electrical consumption reductions of Tap to Tap.
Plenary
10/1/19, 9:50 AM - 10/1/19, 10:15 AM
Presenter(s): AITOR ELORRIAGA FERNANDEZ DE ARROYABE (pasek minerales, sau)
Abstract:
The purpose of Sinter plants is to heat iron ore fines along with fluxes and coke fines or coal, to produce a semi-molten mass that solidifies into porous pieces of sinter with the needed size and strength. Fluxes used in the sintering process need to have an appropriate size distribution and TI to avoid generation of fines, which could reduce the productivity of the Sinter. Besides, a homogeneous chemical composition and high absorption characteristics are necessary to control the basicity and to combine the flux with P, S, Si, etc, respectively. PASEK Dunite is an ultramaphic rock exploited in the north of Spain with a basic chemical classification, being olivine and serpentine its principal minerals. It is a very homogeneous and hard stone and its main characteristics are: high hot and cold resistance to mechanical stresses, softening and melting points of a flux not of a refractory material. In addition, due to its mechanical and chemical properties, less fines are generated in the sintering process and during the handling and transportation to the blast furnace, improving the productivity of these processes. In this way, the use of PASEK Dunite allows increasing the homogeneity structure of sinter, reducing the percentage of return fines and improving the Sinter productivity.
Plenary
10/1/19, 9:50 AM - 10/1/19, 10:15 AM
Presenter(s): antonio vitor magalhães cota/luana lessa pacheco (vale s/a)
Abstract:
With the sharp fall in commodity prices, the terms cost reduction and higher productivity have become subjects that are constantly addressed in the daily life of companies, since these factors represent a question of survival of the organizations. To achieve this, the search for continuous improvement of our processes in order to guarantee space in the market is a reality and necessity, so it is important that companies know their processes in detail and have the maturity to make decisions based on data and facts. Thus, this work aims to apply the Six Sigma methodology to investigate which are the variables that most influence the transportation process, carried out by large trucks, increasing their specific consumption of diesel, which is the second largest expense of a company. mining in the city of Mariana MG. The goal of the project was to reduce diesel consumption in the large transport fleet by 7.4%, from 0.32 l / t (average carried out from Feb / 16 to Jan / 17) to 0.30 by February 2018 , with an estimated gain of R $ 4.2 million. The results achieved exceeded the established target, reaching a 10% reduction in specific diesel consumption, totaling a projected real gain of R $ 6.4 Million, in addition to the reduction of 1,710.52 t of CO2 in the atmosphere.
Plenary
10/1/19, 9:50 AM - 10/1/19, 10:15 AM
Presenter(s): alexandre camilo leles de figueiredo (samarco mineração s/a), Jackson teixeira de oliveira (vale), vanderson eney de matos (samarco mineração s/a), Douglas Batista Mazzinghy (universidade federal de minas gerais)
Abstract:
This work studied the effect of different ball sizes in the secondary grinding stage of Samarco. The Moly-Cop Tools 3.01 spreadsheet was used for models calibration and simulations, considering grinding balls topsize of 15, 20, 25, 30 and 35mm diameters. A normal specific selection function up to the largest fed ore particle size (840μm) was obtained. The higher generation of fines and compliance with particle size specifications (+ 74μm and -44μm) proved to be more favorable for smaller ball sizes. The specific energy consumption was lower for the 15mm ball (10.7kWh/t), increasing up to the 35mm ball (13.0kWh/t). Although smaller diameter balls seem to be the best option for the size specifications, some factors may limit their use, such as: the higher generation of specific surface area; and the amount of ball purge in the discharge of the mills.
Plenary
10/1/19, 9:50 AM - 10/1/19, 10:15 AM
Presenter(s): Leonardo barbosa Godefroid (Universidade federal de ouro preto), Thompson Júnior Ávila Reis (universidade federal de ouro preto), henrique meckler santos (universidade federal de ouro preto)
Abstract:
In this research, the effects of isothermal treatments at 475ºC in the microstructure and mechanical properties of a lean duplex stainless steel were investigated. Samples of the alloy under conditions as received and aged were analyzed by atomic force microscopy in order to evaluate the technique for the ability to identify aspects that characterize microstructural changes caused by aging. Fracture toughness tests (J x Δa) and fatigue tests (sigma x Nf and da/dN x ΔK) were performed. The results indicate that the αlfa-phase spinodal decomposition occurred. The analysis by atomic force microscopy allowed to identify aspects regarding the preferential phase dissolution and surface texture of the phase α that distinguish the alloy in the as received condition from the aged alloy. As a consequence of the formation of the alfa’ phase, the fracture toughness of the alloy decreased substantially. On the other hand, the fatigue resistance increased significantly.
Plenary
10/1/19, 9:50 AM - 10/1/19, 10:15 AM
Presenter(s): fernando de carvalho (arcelormittal vega)
Abstract:
This paper aims to apply the Lean Six Sigma methodology in the study of the reduction of edge defects caused by the excess coating on the sheet in a continuous galvanizing line, in which the tools of the DMAIC Define, Measure, Analyze, To control in the search of the reduction of the variability of the process, with the foundation in the theoretical foundation regarding the applied method. This study was carried out in the section of the coating pot and had as objective the reduction of 50% of the defects generated by the equipment and control methods.
Plenary
10/1/19, 9:50 AM - 10/1/19, 10:15 AM
Presenter(s): leandro bastos bergami (IFES - VITÓRIA), ANDERSON PEREIRA MARTINS (IFES - VITÓRIA), dIEGO LOUBACH DA ROCHA (IFES - VITÓRIA), CÁSSIO SANTOS DE CARVALHO (IFES - VITÓRIA), fLÁVIO ANTÔNIO DE MORAIS PINTO (IFES - VITÓRIA), ADONIAS RIBEIRO FRANCO JR (IFES - VITÓRIA)
Abstract:
High-chromium cast irons (HCCIs) are used in mining pellet plants as wear plates for protection of transport belts against damages from iron ore pellet transference. In the present work, a high-chromium cast iron (1.9%C, 18.7%Cr) used as wear plate was destabilization of austenite on erosive-abrasive wear resistance of. The wear resistance was evaluated using an impeller drum tribometer (IDT), where iron ore pellets were used as abrasive. The result showed that, after destabilization, secondary carbides are formed and much of austenite transformed into martensite, resulting in a significant increase in the wear resistance of the material.
Plenary
10/1/19, 9:50 AM - 10/1/19, 10:15 AM
Presenter(s): Stephan Weyer (Paul Wurth)
Abstract:
Digitalization of our industry is bringing new opportunities to further optimize operation including production and maintenance. One of the biggest drivers of this digital wave is the artificial intelligence based on big data in combination with process knowledge and IoT technologies. This paper describes the approach to and the status of implementation of modern digital solutions at Rogesa ironmaking plant. The Rogesa implementation includes L2 automation packages for sinter plant and blast furnace process optimization, deep learning with data-driven models. staves wear monitoring by smart sensors, production KPI monitoring via mobile dashboards, condition-based predictive and prescriptive maintenance for tapping equipment and the slag granulation plant as well as a digital twin of the blast furnace using virtual and augmented reality for the visualization of live data, alarms etc. on a 360° tour through of the plant.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): Afonso rangel garcez de azevedo (UFF), Ana Luiza Campinho Paes (UENF), JONAS ALEXANDRE (UENF), Larissa Campos Granato Botelho (UENF), Thuany Espírito Santo de Lima (UENF), Euzébio Bernabé Zanelato (UENF), Markssuel Teixeira Marvila (UENF), Niander Aguiar Cerqueira (FACREDENTOR), Victor de Souza Barbosa (FACREDENTOR)
Abstract:
Structural masonry tecnics is a system used since antiquity, getting notoriety from the second half of twentieth century, being used widely nowadays, mostly in countries with high technological level, like European countries and United States. The simplicity in its executive process, quick construction, material waste reduction, resulting in a lower cost of the work as a whole, leads the constructor to choose this method. In this system there are no beams and columns, and the structural function is executed by walls, wich are formed by bricks joined by laying mortar, and diferently of conventional system, the quality control has to be very rigorous, once that small flaws can cause an irreparable damage. Thus, brick and mortar have to work as one to receive and distribute the loads through the structure without cause harms. So, in this work was made a bibliographic research in order to evaluate the influence of laying mortar thickness at masonry prisms with structural brick, for this were searched different authors and were made comparisons between their studies. According the biography, the increase of mortar joints cause a decrease of prism resistance..
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): Afonso rangel garcez de azevedo (UFF), Larissa Campos Granato Botelho (UENF), jONAS ALEXANDRE (UENF), SERGIO NEVES MONTEIRO (IME), Andreia Arenari de Siqueira (UENF), Ana Luiza Campinho Paes (UENF), Valber Domingos Pinheiro (UENF)
Abstract:
Only in Brazil, around 600.000 tons of unserviceable tires were generated in 2018, which, if inappropriately disposed, become a major problem for the environment and public health. An alternative of environmentally adequate disposal for this waste is incorporated in the mortar. This work aims to evaluate the substitution of part of the sand by rubber powder from unserviceable tires in the subfloor mortar. For this purpose, 4 mortars were developed in mass dosage of 1:6 of cement and sand, with one reference mortar and 3 with proportions of 10%, 20% and 30% of substitution. The particle size and unit mass of the aggregates and mass density, incorporated air content, rheology, compression and tensile strength of the mortars were evaluated. The results showed that there is a mechanical strength decrease of mortar as the proportion of rubber in the mixture increases, due to low specific mass of the waste
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): ana beatriz rodrigues porto (Universidade federal do pará - ufpa), andrey victor lima fanjas (Universidade federal do pará - ufpa), marco antonio barbosa de oliveira (Instituto federal do pará - ifpa), sergio neves monteiro (instituto militar de engenharia - ime), alisson clay rios da silva (Universidade federal do pará - ufpa)
Abstract:
Geopolymers are inorganic polymers of a new class of materials that have particular characteristics, being geopolymerization reactions of several constituents, as natural raw materials of geological origin containing aluminosilicates. In this work, by means of adapted dosage of the components, the geopolymer cement concrete (CCG) was developed, which was compared with the Portland cement concrete (CCP), by fixing the water / binder ratio. To obtain the metacaulim, it was necessary to calcine the kaolin at a temperature of 850ºC for 2 hours and the residue used was blast furnace slag as the main source of calcium. Preliminary studies of geopolymeric mortars with 7 days of cure were carried out. The best percentage found was 69% sand in mortar. This result was then applied to the study of the Geopolymeric Concrete Cement, later submitted to compression tests at the age of 7 days. The results showed that the GCC reached an average compressive strength of 42 Mpa, in compliance with the initial high strength concrete standard and showing results similar to that of Portland cement concrete. The fracture surfaces were analyzed by scanning electron microscopy (SEM), from the fragments removed from the specimens ruptured in the mechanical assay. The analyzes presented the best adhesion matrix / aggregate in the CCG in comparison to the CCP
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): ANDRE BEN-HUR DA SILVA FIGUEIREDO (IME/instituto MILITAR DE ENGENHARIA), Igor Sena Melo (Instituto Militar de Engenharia), Yan Augusto Lopes de Aguiar (Instituto Militar de Engenharia), Letícia dos Santos Aguilera (Instituto Militar de Engenharia), Ronaldo sergio de biasi (Instituto Militar de Engenharia)
Abstract:
The energy absorption in ballistic test of alumina-ultra high molecular weight polyethylene (UHMWPE) composites with different concentrations of alumina was investigated. The ballistic tests were carried out at subsonic speed using a compressed air system. The results showed that energy absorbed by a disk of composite increased monotonically with increasing concentration of alumina, but composites with moderate concentrations of alumina are lighter and may be useful for certain applications. Scanning electron microscopy (SEM) images of composites with 90% and 95% alumina showed voids and transgranular, intergranular and ductile fracture.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): ANDRE BEN-HUR DA SILVA FIGUEIREDO (IME MILITAR DE ENGENHARIA), Thiago dos Santos Nunes (Instituto Militar de Engenharia), Vanessa Ermes Santos (Instituto Militar de Engenharia), Camila Oliveira Baptista (Instituto Militar de Engenharia), Danúbia Bordim de Carvalho (Instituto Militar de Engenharia), Ronaldo Sérgio de Biasi (Instituto Militar de Engenharia)
Abstract:
Oil slicks in water were removed using expanded vermiculite and composites of paraffin wax and nanoparticles of cobalt ferrite (CoFe2O4), nickel ferrite (NiFe2O4) and nickel-zinc ferrite (Ni0,7Zn0,3Fe2O4) in proportions of 13.0wt% and 28.5wt%. The water, oil, and oil/water sorption capacities of vermiculite were investigated. The removal efficiency was determined by measuring the speed of the composite-vermiculite aggregate when it was subjected to the magnetic field of a permanent magnet. The best performance was achieved with a wax composite containing 28.5 wt% of cobalt ferrite.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): Andrey Mariano dos Santos (Instituto Militar)
Abstract:
The present work consisted of the analysis of a composite based on a polymer matrix made from polyethylene terephthalate (PET), reinforced by geopolymer concrete particles. The samples were analysed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The composites were developed aiming sustainability and applications in engeineering
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): Artur camposo pereira (Instituto Militar de Engenharia), Fabio Garcia Filho (Instituto Militar de Engenharia), Fernanda Santos da Luz (INSTITUTO MILITAR DE ENGENHARIA), Luana Demosthenes (INSTITUTO MILITAR DE ENGENHARIA), Michelle Oliveira (INSTITUTO MILITAR DE ENGENHARIA), Ulisses Oliveira (INSTITUTO MILITAR DE ENGENHARIA), Wendell Bezerra (INSTITUTO MILITAR DE ENGENHARIA), Sergio Neves Monteiro (INSTITUTO MILITAR DE ENGENHARIA)
Abstract:
Recently the use of multilayer armor systems (MAS) using natural fiber reinforced polymer matrix composites has been studied as a potential candidate for substitution of these same systems that employ synthetic fibers in their structure, such as aramid fiber (KevlarTM). In fact, it has already been shown that a MAS composed of ceramic material as first layer, natural fiber composites as second layer and metal alloy as third have the same ballistic efficiency as those using KevlarTM laminates as second layer. However, when considering other materials such as Ultra High Molecular Weight Polyethylene (UHWP) the low weight associated with the plates combined with ballistic efficiency make these materials preferred for use as a level III personal protection, although the processing of these high cost. Thus, in order to compete with UHWP it is necessary that MASs with natural fiber composites present a decrease in system weight. In the present work, a MAS composed of alumina ceramic as first layer and epoxy matrix composite reinforced with jute fabric as second layer. The objective was to try to optimize the thickness of the first layer and consequently the weight of the system. Jute fiber is one of the most studied natural lignocellulosic fibers (LNFs) and presents an excellent relationship between strength and weight, so it has potential for engineering applications. The thickness of the ceramic layer varied from 10 to 7 mm. Ballistic tests were performed and the indentation depth results were used as a measure of the MAS efficiency. The reduction of the thickness presented results below those foreseen in standard even with 7 mm of first layer, and a reduction in the cost and weight of MAS
Plenary
PRODUCTION AND CHARACTERIZATION OF CONCRETE WITH ADDITIONAL ASPECTS OF CARTONED ASPECTS
Presenter(s): Carlos Eduardo Vidal da Silva (Dofsubsea), Leonardo Alves da Conceição (UniFOA), Carlos Antônio da Silva Costa (UniFOA), RICARDO DE FREITAS CABRAL (UniFOA/UGB), Wesley Rossi Pimenta (UniFOA)
Abstract:
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): Carlos Paulino Agrizzi (UENF)
Abstract:
Brazil, as the fourth largest producer of ornamental stones in the world, is used in interior and exterior coatings such as floors and walls. It is also a major emitter of waste from its production processes. The objective of this work is the use of this passive in the production of an artificial rock through the agglomeration of natural aggregates (residue) to a minimized polymer matrix, being this material, of high economic value today. The quarry residues were used for the cutting and polishing of the ornamental rock (beneficiation) and epoxy resin (thermosetting polymer), where a mixture of these materials was selected, under different granulometries, which maximized its density, consequently minimizing the volume of voids interparticular, being this one used for the making of plates in specific equipment. The apparent density of the material developed was 2.34 g / cm³, with water absorption of 0.13% and porosity of 0.31%, the flexural strength was 27.96 MPa. The values found in the tests meet the technical norms and with respect to the natural ornamental rocks, are superior. Therefore, considering the current exploitation in quarries, this one has presented itself a technical and economically viable way of taking advantage of the residues of its productive chain
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): Daniel DE ALMEIDAGerhardt (Universidade federal do pará)
Abstract:
The incorporation of particulate materials into polymer matrices has become a viable alternative to originate new composite materials, due to several benefits. The objective of this work was to analyze the addition of the kaolinite "in natura" and calcined in a polymer matrix in proportions of 5% and 10% of tailings, in order to discover its changes and to quantify its physical and mechanical properties, comparing the results with literature works. The kaolin waste was subjected to the calcination process, after which the calcined material and the "in natura" were classified in a 100 Mesh sieve for a better uniformity of the particles and then characterized by DRXA composite production was done by manual molding with compression at room temperature and its mechanical properties evaluated and obtained through tensile tests. The results were promising, obtaining approximate and superior values with predicted theorists.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): Daniele Gomes Carvalho (UNITPAC)
Abstract:
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): diogo Monteiro do nascimento (UFPE - universidade federal de pernambuco), Moisés Euclides da Silva Júnior (UFPE - UNIVERSIDADE FEDERAL DE PERNAMBUCO), José Endreo Baracho da Costa (UFPE - UNIVERSIDADE FEDERAL DE PERNAMBUCO), Itamar Rodrigues de Lira (UFPE - UNIVERSIDADE FEDERAL DE PERNAMBUCO), Oscar Olimpio de Araújo Filho (UFPE - UNIVERSIDADE FEDERAL DE PERNAMBUCO)
Abstract:
The AA7075 aluminum alloy is widely used in the industry due: the excellent mechanical properties, low weight and because it is heat-treatable. Its good mechanical resistance properties can be improved when reinforced with ceramic particulate as the niobium carbide (NbC). The start powders of AA7075 alloy were processed in a SPEX type vibrating mill and were sintered in a furnace with nitrogen atmosphere. The composites powders subjected to High Energy Milling (HEBM) were submitted to characterization using Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD) and Laser Diffraction Granulometry. The sintered samples were also characterized by Optical Microscopy (OM), SEM and had their microhardness evaluated by the Vickers Microhardness (HV) test. The results allow to evaluate: the success of the Powder Metallurgy (PM) technique due to the homogeneous incorporation of the reinforcement in the AA7075 alloy matrix mainly the powders with milling time of 120 minutes; the microhardness increased when the milling time increased.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): DIOGO PONTES QUEIROZ (UFPA)
Abstract:
Polymer matrix composites hybrid were made by adding 1.5% and 1 % v/v of accelerator and catalyst respectively. Red mud waste with granulometry at 100 mesh was used and metallic fibers. Waste proportion ranged from 0 %, 5 %, 10 %, 15 % and 20 % by weight and the fiber fixed at 5% by mass. We followed the manufacturing process of manual lamination lay-up. Subjected to physical tests (WA, AP and BD) NBR 12766/1992, flammability (ASTM D 635), mechanical tests flexure (ASTM D 790) and traction (ASTM D 3039). With the increase of the compositions, the physical properties have increased. The composites showed a flame retardation capacity, and the composite of LV 20 % FM 5 % presented better performance. The best mechanical results for flexure and traction were the LV 20% FM 5 %, waste composite, with a mean strength of 70.61 MPa for flexure and 23,98 MPa on average for traction.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): ELAINE APARECIDA SANTOS CARVALHO COSTA ()
Abstract:
This study aims to incorporate residue generated from the lamination process of the flat glass’ production into epoxy matrixes by producing artificial stones, in order to obtain a national material fit for civil construction applications, providing therefore an ecological and economical alternative product. Firstly, the best-packed granulometric composition was determined. Vacuum, vibration and compression were applied for the production of the specimens. They were also tested for physical properties, flexural strength, abrasive wear and submitted to Scanning Electron Microscope analysis. The artificial stones presented mechanical properties within the expected range and physical properties fit for facade coating, making it suitable for medium traffic applications
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): Eryck EDUARDO SIMPLICIO DOS SANTOS (UNIVERSIDADE FERDERAL DO PARÁ (UFPA)), Victor Hugo Mafra Monfredo Ferreira (UNIVERSIDADE FERDERAL DO PARÁ (UFPA)), Brenda Thayssa Figueira Daniel (UNIVERSIDADE FERDERAL DO PARÁ (UFPA)), Bruno Henrique Alves Mendes (UNIVERSIDADE FERDERAL DO PARÁ (UFPA)), Deibson Silva da costa (UNIVERSIDADE FERDERAL DO PARÁ (UFPA))
Abstract:
Seeking the reuse of solid residues, the present work produced polymeric resin compounds using the industrial residue of Red Mud, from the mining company Hydro Alunorte (Pará), with its mechanical properties of flammability. The granulometries employed were 0, 100 and 200 mesh, with proportions of 10% and 20% for each. Isophthalic unsaturated polyester resin was used, coupled to the initiator and the Cobalt accelerator in proportions of 1 % and 1,5 %, in v/v, respectively. The manual method “hand lay up” was used to manufacture the composites in metal molds. Traction, physical and flamel retardance tests were performer according to ASTM D 3039, NBR 12766 and ASTM D 635, respectively. The results of the traction resistance were satisfactory as the granulometry decreased, the best with the composition of 10 % 100# reaching 40.35 MPa of resistance. The flame resistance was also beneficially influenced by decreasing the granulometry, and the lowest burning rate that was made with the composition of 20 % 200# 16,16 mm/min. The results of the physical tests (PA, AA, MEA) varied according to the proportions and granulometry.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): Ester Albuquerque (UENF), JONAS ALEXANDRE (UENF), AFONSO RANGEL GARCEZ DE AZEVEDO (UFF), EUZÉBIO BERNABE ZANALETO (UENF), MARKSSUEL TEIXEIRA MARVILA (uenf), sergio neves monteiro (ime), thais ferreira torres (iff)
Abstract:
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): fernanda santos da luz (IME), Fabio da Costa Garcia Filho (ime), Luana Cristyne da Cruz Demosthenes (ime), Michelle Souza Oliveira (IME), Ulisses Oliveira Costa (IME), Wendell Bruno Almeida Bezerra (IME), Artur Camposo Pereira (IME), Sergio Neves Monteiro (IME)
Abstract:
The replacement of synthetic fibers to natural fibers has been the subject of intense research, particularly when applied in composites. In this work, the tucum fibers (Bactris setosa), typical of the Amazon Region, were investigated as reinforcement of the epoxy polymer matrix. The composites prepared with different volume fractions (20 and 40%) of tucum fiber were characterized for Izod impact and ballistic impact energy absorption by .22 ammunition. The results showed that the composite with 40% of tucum fiber presented an increase of 86% in the average absorption of Izod impact energy in relation to the composite with 20% vol of tucum, however, it exhibited worse ballistic performance.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): FLAVIO JAMES HUMBERTO TOMMASINI VIEIRA RAMOS (Instituto Militar de Engenharia (IME)), Ana Paula dos Santos Pereira (Instituto Militar de Engenharia), Marcelo Henrique Prado da Silva (Instituto Militar de Engenharia (IME)), Jheison Lopes dos Santos (Universidade Federal Rural do Rio de Janeiro (UFRRJ))
Abstract:
The geopolymer materials are obtained by the alkaline activation of aluminosilicate sources. Also called geopolymers; have high mechanical strength, chemical inertia and can be manufactured from a number of by-products in the industry. In this work the geopolymer samples were produced by the alkaline activation with NaOH of blast furnace slag (EAF) with addition by weight of 3%, 4% and 5% of nióbia (Nb2O5). The geopolymer samples were produced in different solid to liquid ratios by adopting the ratio by weight with values of 1.2; 1.4 and 1.6. The study was based on the analysis of the apparent porosity by the Archimedes method, as well as the analysis of scanning electron microscopy (SEM), through which it was possible to observe the surface, microstructure, interfacial interface of the sintered aluminosilicates hybrids, and finally the processability of sustainable materials, as in the case of blast furnace slag geopolymers. The research demonstrated the feasibility of the sintering process of geopolymers for possible application as engineering material. The specimens produced reached dimensional stability and variable porosity. The material presented a great possibility, with potential to be used as a good gas and liquid adsorption medium, besides several applications, such as thermal and acoustic coating, since the processed product is a ceramic material.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): FLAVIO JAMES HUMBERTO TOMMASINI VIEIRA RAMOS (Instituto Militar de Engenharia)
Abstract:
The study was carried out by production of conductive polymer films from the dispersion of magnetic particles of manganese ferrite (MnFe2O4) or zinc ferrite (ZnFe2O4) in the polymer matrix of poly (methyl methacrylate) (PMMA) by polymerization in situ of the methyl methacrylate monomer (MMA). The type of polymerization used was in bulk, with the purpose of obtaining materials that enabled the manufacture of materials for use in devices.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): Gabriel da Cruz Oliveira (uNIversidade federal do pará), lucas rezende almeida (universidade federal do pará), willian rayol da silva (universidade federal do pará), bruno henrique alves mendes (universidade federal do pará), brenda thayssa figueira daniel (universidade federal do pará), denilson da silva costa (universidade federal do sul e sudeste do pará), deibson silva da costa (universidade federal do pará)
Abstract:
Polyester resin composites were fabricated using aluminum residue to evaluate the behavior of this material to physical, mechanical and flammability characterization. Plates were made using the hand lay-up method for compositions in weight of 0 %, 10 %, 20 % and 30 % particulate of the dispersed phase, which was beneficiated in a 100 mesh sieve. The resin used was the isophthalic unsaturated polyester, and in the reaction, the cobalto (1,5 % v/v) accelerator and the initiador MEK-P (1 % v/v). Tests were carried out for physical characterization according to NBR 12766, mechanical characterization according to ASTM D 3039 and flame resistance in accordance with ASTM D 635. The physical tests established variant values based on the proportion of aluminum particles in the matrix. The tensile strength showed values as inversely proportional to the increase of the load in the matrix, being compared with other literature in order to establish the variation of tensile strength according to the fractions. The composite showed characteristics of flame retardancy in the termal analysis test, having a reduction of 95.53 % compared to the resolution CONTRAN 675, allowing its use as a material resistant to burning.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): géssica da silva nicolau (Instituto Militar de Engenharia (IME) ), Suzane de Sant’ana Oliveira (Instituto Militar de Engenharia (IME) ), Karollyne Gomes de Castro Monsores (Instituto Militar de Engenharia (IME) ), Anderson Oliveira da Silva (Instituto Militar de Engenharia (IME) ), Ricardo Pondé Weber (Instituto Militar de Engenharia (IME) )
Abstract:
Brazil is one of the most consuming countries of coconut water, which generates high levels of coconut residue from which the coconut fibers can be extracted. The treatment via mercerization using sodium hydroxide (NaOH) is widely used in natural fibers, since it tends to provide a better interfacial interaction between the fiber and the polymer matrix. In this sense, the present work aims to analyze the effects obtained in the coconut fiber after the mercerization process with 3% NaOH. The FTIR, water absorption and SEM analyzes were performed on fresh and treated coconut fibers. The results obtained by the FTIR analysis indicated the partial removal of lignin and hemicellulose present in coconut fiber; the water absorption analysis showed that in the mecerizadas fibers the absorption rate was greater than in natura and that tends to be higher with the passage of time; and the analysis of MEV allowed to observe the disaggregation of fibrils in microfibrils. Therefore, the presented data suggest the effectiveness of the mecerização process, due to the increase of the superficial reactivity.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): Guilherme wolf lebrão (Instituto Mauá de Tecnologia), Willian Zam Vieira (IMT), Fernanda Bordini Rossato (IMT), Vitor Souza Ivo (IMT), Débora Henrique Laranja (IMT), Giovanna Pierina Montuori (IMT), Juliana Sonnini Vedovello (imt), Maria Gabriela Congento Ramos (IMT), Luis Alberto Jermolovicius (imt)
Abstract:
Composite materials have increasingly found industrial applications because of their strength/weight ratio, their high structural performance and low cost to be produced. However, with the increase of the production of these materials the disposal in landfills also increases, since its recycling is complex. It is known that a route for the recycling of the glass fiber reinforced orthophthalic polyester resin composite can be made via heating in an inert atmosphere. Thermogravimetry, Derivative Thermogravimetry, Differential Thermal Analysis and Mass Spectrum was carried out to determine the by-products from the degradation of this material. The equipment was used to heat the material to 450 ° C under a nitrogen atmosphere. The polyester resin after 425 ° C is totally degraded, leaving only the glass fiber that can be reused. Among other substances, styrene, a great value component as a recycled material, was obtained.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): letícia quaglio camargo (centro universitário fei), Gigliola salerno (centro universitário fei)
Abstract:
The aim of this work is according to the feasibility of replacing the ABNT2224 aluminum alloy, the main rotor blade material of the Robinson R22 Beta II helicopter by ABNT 7075 aluminum alloy or polymer matrix and carbon fiber reinforcement unidirectional composite, in order to evaluate the increasing of the useful life, mechanical resistances and costs reduction. In the longitudinal and transversal sections aluminum alloys, ABNT 2224 and 7075, were used to perform the metallographic analysis and Vickers hardness with micro loading. Afterwards there were made test specimens for tensile tests for aluminum alloys, ABNT 2224 and 7075, flexure and impact for aluminum alloy ABNT 7075 in order to obtain its mechanical characteristics. It was possible to observe similarity in the hardness values of 140 HV0,2kg in average and a resistance limit of 330MPa- 340MPa, but there was a divergence in the yield limit values considering the change. It has concluded that in relation to mechanical properties, hardness and cost reduction the replacement of ABNT 2224 aluminum alloy by ABNT 7075 aluminum alloy is feasible. Unidirectional composites of 3mm and 4,5mm thickness were laminated, and after that specimen test, the same tests had been done for traction, flexure and impact as well as for aluminum alloys. It was possible to observe elastic modulus values, resistance limits higher than the aluminum alloys values, but when comparing them of absorbed energy in the impact test it was possible to observe lower values, the substitution is feasible if the blade is impacted lower values than obtained.
Plenary
A STUDY ON THE MICROSTRUCTURAL EVOLUTION AND MECHANICAL PROPERTIES AT NiTi EQUIATOMIC AND Ni58,5at.%-Ti41,5at.% ALLOYS SOLUTIONED
Presenter(s): DANILO ABíLIO CORRêA GONçALVES (IME MILITAR DE ENGENHARIA), Juliana diniz e castro (ime instituto militAR DE ENGENHARIA), Andrey de Moraes Barcelos Casanova (ime instituto militAR DE ENGENHARIA), Rodolfo da Silva Teixeira (ime instituto militAR DE ENGENHARIA), Thiago Henrique Fernandes Dias Ferrão (ime instituto militAR DE ENGENHARIA), Naiara Vieira Le Sénéchal (ime instituto militAR DE ENGENHARIA), Rebeca Vieira de Oliveira (ime instituto militAR DE ENGENHARIA), Patricia Freitas Rodrigues (ime instituto militAR DE ENGENHARIA), Andersan dos Santos Paula (ime instituto militAR DE ENGENHARIA)
Abstract:
This paper evaluated the effectiveness of the solution thermal treatment on NiTi alloy with 58.5at.% Ni compared to equiatomic composition alloy, obtained by vacuum arc remelting (VAR). The solution was carried out at 950 ° C on uncontrolled atmosphere furnace with 2 h soaking time, followed by rapid cooling in water at room temperature. Optical microscopy and scanning electron microscopy images were analyzed after metallographic preparation of the cast and solutioned samples, as well as quantification of the second phase by optical micrographs analysis. The mechanical properties were evaluated by Vickers microhardness test. The thermal treatment imposed resulted in morphological alterations at equiatomic alloy and it was not possible to verify the complete dissolution of the precipitates at alloy with high Ni content. It was observed decrease of hardness with the solution at NiTi equiatomic and increase at Ni58.5at.%-Ti41.5at.% alloy. Thus, to obtain an optimal solution of the alloys, a greater soak time is required.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): lorena isabela de oliveira ribeiro (UFMG), João victor lucas amim (ufmg), pedro damas resende (ppgem/ufmg), jéssica dornelas silva (ppgem/ufmg), suzanny cristina soares martins (ppgem/ufmg), leandro de arruda santos (ufmg), vicente tadeu lopes buono (ufmg)
Abstract:
The aim of the present study was to evaluate, by rotary bending fatigue tests, the fatigue resistance of two different NiTi alloys under strain-controlled testing condition at 25°C. Besides that, the mechanical, thermal and structural properties of the wires were characterized by DSC, XRD, SEM/EDX and tensile tests. The results revealed that both materials were superelastic at room temperature and therefore presented an austenitic matrix and full shape recovery in load/unloading tests in tension. One of the samples has an oxide covered surface whilst the other has passed through a step of surface finishing. Also, it was determined that both materials are Ti-rich. Despite the similar properties, sample 1 presented 77 cycles to failure, while sample 2 resisted 1827 cycles.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): naiara vieira le sénéchal (instituto militar de engenharia), Patrícia Freitas Rodrigues (INSTITUTO MILITAR DE ENGENHARIA), edir neves teixeira (CENTRO UNIVERSITÁRIO DE VOLTA REDONDA (UNIFOA)), shimeni baptista ribeiro daer (Centro Universitário de Volta Redonda (UNIFOA)), FRANCISCO MANUEL BRAZ FERNANDES (UNIVERSIDADE NOVA DE LISBOA), ANDERSAN DOS SANTOS PAULA (INSTITUTO MILITAR DE ENGENHARIA)
Abstract:
This work aimed to understand the microstructural characteristics of a Ni-rich NiTi alloy hot deformed in the rotary forging process, which were subjected to the process with different preheating temperatures (800 and 950 ºC) without and with previous annealing heating treatment (950 ºC during 2 hours) for ingot homogenization. Through the aspects of microstructural evolution verified with the aid of the Optical Microscopy, Scanning Electron Microscopy and X-Ray Diffraction techniques could observed that adoption of the previous annealing heating treatment and increase of the preheating temperature in the steps of hot rotary forging, led to the most satisfactory to the thermomechanical processing to be applied in this alloy in order to following cold deformations steps.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): RAYANDER MARTINS PIMENTA (Centro Federal de Educação Tecnológica Celso Suckow da Fonseca (CEFET/RJ) - Campus angra dos reis), Rafael Humberto Mota de Siqueira (Instituto de Estudos Avançados (ieav/dcta)), gláucia domingues (CENTRO FEDERAL DE EDUCAÇÃO TECNOLÓGICA CELSO SUCKOW DA FONSECA (CEFET/RJ) - CAMPUS ANGRA DOS REIS), luiz alberto dos santos (CENTRO FEDERAL DE EDUCAÇÃO TECNOLÓGICA CELSO SUCKOW DA FONSECA (CEFET/RJ) - CAMPUS ANGRA DOS REIS)
Abstract:
In this work, samples of NiTi alloy with composition of 50,9% at Ni underwent by a superficial laser treatment Nd:YAG. The objective of this work was to modify the surface of the samples to compare the mean roughness parameter (Ra) between the samples that underwent laser pulse interaction and the sample that did not underwent by the superficial laser treatment, since for some biomedical applications the surface of the material needs to be rough. For this purpose, the laser was used in conditions of different feed speeds. The sample treated with the lowest speed of laser feed, of 12.5 cm.s-1, presented a higher roughness (Ra of 210 nm) due to the longer contact time of the beam with the surface of the sample and, moreover, formation of oxides on the surface of the sample.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): Anthony Garotinho barros assed matheus de oli (Instituto militar de engenharia), Andreza menezes lima (instituto militar de engenharia), wagner anacleto pinheiro (instituto militar de engenharia)
Abstract:
Graphene oxide was synthesized and later reduced by the use of vitamin C, for the verification of results were used the techniques of X-ray diffraction (XRD), scanning electron microscopy (SEM) and Raman spectroscopy (RS). In the graphene oxide synthesis step the XRD evaluated the effective oxidation of the graphite precursor while the SEM observed the exfoliation, for the reduction, the XRD and the ER analyzed the removal of the functional groups, while the MEV evaluated the purity of the material.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): aTHOS fernandes araujo (UFMG), Gustavo Henrique Sousa (ufmg), Guilherme Vitor de Araujo (UEMG), igor cuzzuol dos santos (ufmg), loyslene rabelo fernandes (ufmg)
Abstract:
The development of magnetic nanoparticles has received considerable attention from researchers due to their potential application in different technological fields, especially in microelectronics and medicine. Nanoparticulate magnetite is particularly attractive for these purposes because it exhibits superparamagnetic behavior, biocompatibility and oxidation resistance. In this study the synthesis of nanoparticles was evaluated by coprecipitation. For this, the influence of Fe+2/Fe+3 molar ratio and NaOH concentration variation on particle nucleation and precipitation was observed. If possible, determine the best parameters to obtain them and guarantee their properties. For the structural verification, the characterization of the samples was performed by X-ray diffraction (XRD). The molar ratio of Fe+2/Fe+3 was shown to be an important variable, in very small ratios the result obtained was goethite, while the synthesis from the 0.5 ratio was observed only the magnetite. And the variation of the OH- concentration had influence in the size of the nucleated particles, in which smaller particles were obtained in more basic means.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): VINICIUS OLIVEIRA DOS SANTOS (LEBm/HU-UFSC), Patricia Ortega Cubillos (LEBM/HU-UFSC), Claudio Teodoro dos Santos (INT), Wellington Gilbert Fernandes (INT), Ieda Maria Vieira Caminha (INT), Maurício de Jesus Monteiro (INT), Carlos Rodrigo de Melo Roesler (LEBm/HU-UFSC)
Abstract:
The fretting-corrosion mechanism in the stem-head and stem-cement interface generate metallic debris and ions, that can increase the incidence of adverse events, as a failure of the implants or adverse tissue reactions. This has motivated several authors to investigate the causes of this mechanism in hip prosthesis. The present work aims to identify which interface, stem-head or stem-cement, is the most affected by the fretting-corrosion mechanism, as well as the causes of this mechanism and the difference of damage between the interfaces through in vitro and in silico analysis. Four pairs of femoral stems and heads were evaluated, three pairs for in vitro analysis and one pair for 3D reconstruction and in silico analysis. The in vitro analysis, fretting-corrosion testing, and damage analysis, allowed to identify that the stem body was the surface most affected by fretting-corrosion mechanism, with an affected area higher than the trunnion surface. The in silico allows to identify that the micromotion in the stem-cement interface was higher than at the stem-head interface. This high micromotion tends to increase the damage by fretting-corrosion. The results showed that the damage by fretting-corrosion was higher in the stem-cement interface, possibly caused by the higher micromotion in the interface.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): BRENNO LIMA NASCIMENTO (Universidade Federal de Sergipe), Priscylla Ferreira dos Santos (Universidade Federal de Sergipe), Raphael cardoso calazans (UNIVERSIDADE FEDERAL DE SERGIPE), Isau de Souza alves junior (universidade federal de sergipe), Matheus Duarte Macedo (universidade federal de sergipe), sandro griza (universidade federal de sergipe)
Abstract:
I In the present study, a flange fractured in service was analyzed in the region of section change between the face and the threaded shaft. In the analysis of failures were performed chemical analysis, macroscopic analysis, analysis of scanning electron microscopy and metallography. The results demonstrated that the fracture occurred due to fatigue due to the flexural load stimulated by a change in curvature
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): BRENNO LIMA NASCIMENTO (UNIVERSIDADE FEDERAL DE SERGIPE), MATHEUS PORTO TRINDADE (UNIVERSIDADE FEDERAL DE SERGIPE), matheus mariano da silva reis (universidade federal de sergipe), abraão santos silva (universidade federal de sergipe), Thiago Santana Gama (mfx do brasil), Samuel Deoteronio da Silva (mfx do brasil), José Fábio Abreu de Andrade (mfx do brasil), sandro griza (universidade federal de sergipe)
Abstract:
The present work had the objective of discovering the root cause that led to the failure of tension armor wires of a submarine umbilical during fatigue tests, besides to understand the dynamics of the failure. The wires were previously divided into groups according to fracture aspect: fragile, ductile and with cut. For examine the fractures, macroscopic analyzes and microstructural analyzes were performed on planes contained in the region of fracture initiation. The investigation strategy adopted was to identify the relationship between cuts and fractures, to observe whether the cuts occurred before or after the tests, to examine whether there was plastic deformation by twist from the fabrication and to verify the existence of metallurgical failures in the selected wires that promoted the beginning of the fault. It was verified that there wasn't plastic twist and that the failure of the wires occurred due to fatigue associated with mechanical cutting marks present in most of the wires in a systematic way, causing the progressive reduction of the resistant section of the armature until its total collapse.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): BRENNO LIMA NASCIMENTO (universidade federal de sergipe), matheus porto trindade (universidade federal de sergipe), matheus mariano da silva reis (universidade federal de sergipe), gustavo dória lima (UNIVERSIDADE FEDERAL DE SERGIPE), Thiago Santana Gama (mfx do brasil), Samuel Deoteronio da Silva (mfx do brasil), José Fábio Abreu de Andrade (mfx do brasil), Sandro Griza (UNIVERSIDADE FEDERAL DE SERGIPE)
Abstract:
This study aims to present a simplified evolutionary methodology for the preparation of umbilical armor wires samples for fatigue tests, considering the importance of these tests to guarantee umbilical reliability and the complexity of the recent applied methodologies. Wire of 5,5 mm diameter made of medium carbon steel, highly deformed in the cold and protected by a zinc layer, was the object of the study. The proposed procedure was based on the effect of stress concentration due to the surface finishing, and was to improve the finishing of the wire ends, besides controlling the clamping pressure imposed by the machine claws. The application of the methodology proposed in the study resulted in fractures of the samples within the measurement base. The surface factor has a large effect on high hardness alloys, and consequently the end regions of the specimens had greater fatigue strength than the central region, provided the clamping pressure of the claws was not excessive. Additionally, the methodology for the comparison between fatigue strength of wires without and with circumferential welding was applied. Welded wires showed lower fatigue strength than weldless wires.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): bruno de paula rosa (UCDB - Universidade CATÓLICA Do Bosco), IGOR AUGUSTO ZATTI GOMES (UCDB - UNIVERSIDADE CATÓLICA DO BOSCO), CRISTIAN MARKAKIS KONTOS (UCDB - UNIVERSIDADE CATÓLICA DO BOSCO), WENDER KOTOVAS BIAZUS (UCDB - UNIVERSIDADE CATÓLICA DO BOSCO), TARCISIO WESSLER ARCE (UCDB - UNIVERSIDADE CATÓLICA DO BOSCO), Fernando Montanare Barbosa (UCDB - UNIVERSIDADE CATÓLICA DO BOSCO), Daniel José Laporte (UCDB - UNIVERSIDADE CATÓLICA DO BOSCO), Fabiano pagliosa branco (UCDB - UNIVERSIDADE CATÓLICA DO BOSCO)
Abstract:
Beer is the most consumed alcoholic beverage in the world. The market is increasingly looking for differentiated and even exclusive products, so the innovation of servers. This project aims to develop a device to facilitate the process of serving beer. The implementation of the server in the SolidWorks software was done to simulate the ideal measurements, and through these measures, it was simulated in the program Adams - The Multibody Dynamics Simulation Solution, where applying a force of 20 N (Newtons), was obtained the behavior of angular velocities in degrees / sec in the device. Through the result of GDL = 1, it was observed that with only one force application it is possible to move the device.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): CAMILA FAGUNDES DE PAULA GUEDES (universidade federal fluminense)
Abstract:
STRUCTURAL STEELS ARE STEELS WITH ENOUGH INDUSTRIAL APPLICABILITY, SINCE THEY HAVE GOOD MECHANICAL RESISTANCE AND EASY SOLIDABILITY. THE APPLICATIONS ARE TURNED TO VARIOUS AREAS AS: NAVAL, PETROCHEMICAL, PIPELINES, CIVIL CONSTRUCTION AMONG OTHERS. THE IMPORTED TUBULAR WIRE IS ALREADY USED IN WELDING PROCESSES OF THE INTERNAL ASSEMBLY OF A SUBMARINE, A COMPARATIVE STUDY BETWEEN THE IMPORTED AND NATIONAL WIRE WOULD BE OF GREAT VALUE FOR COMPARISON OF PROPERTIES. HOWEVER THIS WORK HAS THE OBJECTIVE OF THE MICROSTRUCTURAL CHARACTERIZATION OF STRUCTURAL STEEL MATERIAL GRADE S355NL WELDED BY THE FCAW PROCESS WITH NATIONAL TUBULAR WIRE, AIMED TO ANALYZE ITS MICROGRAPHIES AND MACROGRAPHIES, AS WELL AS MECHANICAL AND CORROSION PROPERTIES.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): cássia de souza almeida (universidade federal fluminense), cláudio faria lopes junior (universidade federal fluminense), patrícia sousa nilo mendes (universidade federal fluminense), Erica Marcelino Freitas de SouzaSilva (universidade federal fluminense), ladário da silva (universidade federal fluminense)
Abstract:
Superalloys are nickel, iron-nickel or cobalt-based metal alloys used in industry when materials with better properties than conventional alloys are needed, from cryogenic to high temperatures. A-286 superalloy is a material capable of combining good corrosion resistance and excellent mechanical properties, especially at high temperatures, which guarantees its importance to the most diverse areas of Engineering. The aim of this paper was study the properties of an A-286 superalloy using the Confocal Microscopy technique for surface evaluation, in which roughness measurements were performed in addition to its topography, Optical Microscopy for microstructural analysis of the material, scanning electron microscopy for surface and compositional analysis and the Ellipsometry technique to obtain the optical properties of the surface. Through the low values found for roughness and topography survey, an excellent finish and good flatness on the surface of the samples was evidenced; the optical microscopy revealed the microstructure of an austenitic matrix with the presence of inclusions, while scanning electron microscopy allied to the EDS technique, the chemical composition of the superalloy was determined. Finally, through the ellipsometry technique, the ellipsometric parameters tan(Ψ) and cos(Δ) were obtained.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): DIRCEU DA SILVA JUNIOR (IFES - Instituto Federal do Espírito santo), BRENO MENDES RABELO AVILA (IFES - INSTITUTO FEDERAL DO ESPÍRITO SANTO), JAQUELINE POLEZI MAZINI (IFES - INSTITUTO FEDERAL DO ESPÍRITO SANTO), LUCAS DE ALMEIDA QUARESMA (IFES - INSTITUTO FEDERAL DO ESPÍRITO SANTO), ANDRÉ ITMAN FILHO (IFES - INSTITUTO FEDERAL DO ESPÍRITO SANTO)
Abstract:
Microalloyed steels are used in the oil and automotive industry, due to the suitable mechanical properties achieved even with little additions of alloying element such as niobium and molybdenum. For the maximum performance, these elements are introduced to favor the ferritic-bainitic structures formation. Niobium act in the grain refinement. However, recent researches show grain refinement can hinder bainitic formation. Therefore, this paper aims to evaluate the niobium and molybdenum effect in the microalloyed steels. Two steels bars with variation in the niobium and molybdenum content were forged. Quenching and tempering treatments were conducted and through tempering curve the maximum hardness temperature was identified. The samples in this condition were used for traction, wear tests and microstructural characterization. Thermodynamic simulations were also made to appraise the precipitates formation. The results showed increasing the niobium content produce better mechanical properties. This indicates the grain refinement effect and the niobium carbide precipitation are most important in the mechanical properties than the increase in bainite sheaves obtained with the molybdenum addition.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): Elaine Cristina Pereira (universidade estadual do norte fluminense), Arthur Ribeiro Figueiredo (Universidade Federal do Rio de Janeiro), sergio neves monteiro (Instituto Militar de Engenharia), letícia soares monteiro (UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE)
Abstract:
Carbon, galvanizedand stainless steels are common in pulp and paper mills, especially in the recovery boiler environments. The recovery environment may have some factors that can cause an acceleration in the corrosion of these metals as high pH, presence of chlorides and sulfides and oxygen dissolved and vapor condensate. Therefore, the present work has a characterization of 1020 carbon, hot and galvanized steel 304 in a recovery environment. Optical, confocal, scanning electron (SEM), X-ray diffraction (XRD) and microhardness parameters, it was not necessary to verify that the carbon and galvanized steels are uniform corrosion, and three materials of the middle oxidizing in the middle studied, the middle carbon, beyond a minimum hardness. It has already been created a resistance to corrosion with greater intensity of layer of oxide of oxide of greater resistance in relation to the others. Therefore, stainless steels are most commonly used in recovery boiler environments.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): FABIO DE OLIVEIRA BRAGA (FACULDADE SENAI RJ), Bismarck da Silva santos (FACULDADE SENAI RJ), marcello ferreira machado (FACULDADE SENAI RJ), LIDIA ÁGATA DE SENA (FACULDADE SENAI RJ)
Abstract:
The AISI 310 austenitic stainless steels are commonly used in continuous or intermittent services in high temperature and oxidizing atmospheres. The usefulness of this alloy at high temperatures is due to its high corrosion resistance, high mechanical strength, resistance to creep and thermal fatigue, as well as high fracture toughness. However, the literature indicates the probability of occurrence of deleterious phases such as sigma phase (σ) and chromium carbides (CrxCy). They may cause serious sensitization, due to nucleation of these phases in the grain boundaries, which is intensified for longer times and higher temperatures. This work aims to investigate the microstructural changes that may occur in the AISI 310 stainless steel when heat treated in ambient atmosphere for 1 hour at temperatures in the range of 500 to 900 °C. The samples were analyzed by optical microscopy and X-ray diffraction, for the evaluation of the phases and microstructures, especially those that have the potential to cause failure to equipment using this stainless steel as base material.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): Ihana Gabriela Conceição de Jesus (universidade federal de sergipe), Marcos Menino de Macedo Filho (Petróleo Brasileiro S.A), Matheus Porto Trindade (Universidade Federal de Sergipe), Sandro Griza (Universidade Federal de Sergipe)
Abstract:
It was made failure analysis and metallurgical characterization on filter bolts of derivative valve air, used in offshore plataform. Stress corrosion cracking mechanism was identified (SCC). The bolts were manufactured from austenitic stainless steel annealed bar. The thread fillets and head bolt were manufactured by cold deformation. The average hardness at the center of the bolt was 201 HV and 296 HV in fillet root. Alternatives to reduce the incidence of future failure are the utilization of more resistant to SCC steel alloys, reduce the preload of the bolts and use suitable seal to avoid contact of the regions more stressed of the bolt with the corrosive environment.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): MATHEUS MARIANO DA SILVA REIS (ufs), ABRAÃO SANTOS SILVA (solução engenharia ltda), Brenno Lima Nascimento (ufs), Frederico Castro Souza (votorantim), Iris Sterfanie Santos (ufs), Sandro Griza (ufs)
Abstract:
The present work deals with a fault analysis on a blade sheet of a calcination component. This plate was made with a cold rolling process and a stainless steel, during the performance of its function was subjected to traction and flexion, the mechanisms that caused the fatigue. Therefore, a failure analysis was performed, which consists of a fatigue fracture after a plastic process. The hardness test found the value of 435 HV from the cold manufacturing process. In addition, a sheet has overheated fracture images.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): RENAN CELESTINO SILVA SANTOS (Universidade federal de sergipe), Mateus Mariano da Silva Reis (Universidade Federal de sergipe), Lucas Silva Fontes (Universidade federal de sergipe), Isau de Souza Alves Junior (universidade federal de sergipe), ABRAÃO SANTOS SILVA (universidade federal de sergipe), Marcos Menino de Macedo Filho (Universidade federal de sergipe), Sandro Griza (universidade federal de sergipe)
Abstract:
In the present study, the failure of an axis used for torque transmission in ore mills was analyzed. The techniques of crack surface analysis, metallography, chemical analysis and microhardness tests were applied. The crack began in a groove near the comer between the inner diameter and the face of the tube constituting the egg axis. This groove may be a result of localized grinding or welding. Microstructural transformation of martensite occurred due to the thermal contribution at the groove site, which weakened the material and favored cracking. The recovery process by welding in the crack region is an alternative for large structures and difficult to replace, although we emphasize that the recovery will hardly produce the same mechanical properties of the original axis
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): VINICIUS OLIVEIRA DOS SANTOS (LEBM/HU-UFSC), pATRICIA oRTEGA cUBILLOS (lebm/hu-ufsc), Carlos Rodrigo de Melo Roesler (LEBM/HU-UFSC), Joseph quadri NOVY (LEBM/HU-UFSC)
Abstract:
The microstructure of metallic material influence the mechanical behaviour of the product. However, the standards ISO 5832-4 and ASTM F75, that contain the requirements of Cobalt-Chromium-Molybdenum Alloy Castings for surgical implants, don’t specify the acceptable microstructure. The aim of the current work is evaluating the microstructure influence in the premature failure of a femoral stem manufacturer in cobalt-chromium-molybdenum casting alloy. The stem fractured during the in vitro testing. After this, the stem was sectioned to material characterization and fractography analyze. The material of the stem was accorded with the requirements of ISO 5832-4 and ASTM F75 standard in relation to chemical composition, microstructure and hardness. The fracture occurred by fatigue mechanism, with evidences of micromechanism of fatigue with cleavage in about 50% of the area fractured. Were detected secondary cracks with inclusions close, possible carbides M23C6. The high amount of carbides probably was the cause of failure, due to generate intern stress fields that facilitate the nucleation and propagation of microcracks. The results indicate the need to include, in the associated technical standards, specifications to microstructure of cobalt-chromium-molybdenum casting alloy, aiming to ensure a greater safety of femoral stems.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): Wellington bruno silva de jesus (UFPA), RENATO DE SOUZA FERREIRA (IFPA), LUIZ GABRIEL DA SILVA NASCIMENTO (IFPA), Deibson Silva da Costa (UFPA)
Abstract:
Situations in which welded structures of stainless steels show failures and / or loss of important properties should be uncommon since, according to the literature, stainless steels have good weldability and only require special care to avoid defects. In view of this, this work intends to list the probable causes that may have led to cracking of a stainless steel device through the characterization of the microstructures, for which a sample was taken from a segment of a device from a gas pipeline in which were identified during routine maintenance. Using microstructure analysis including testing, penetrating liquids, cutting and sample preparation for optical microscopy (OM) and scanning electron microscopy. The observations of the sample allow the identification of the constituents, as well as the variation in the composition and morphology of the microstructures of the regions near and far from the crack, as well as the presence of pores that can be associated to the welding process in the fault region. The results indicate several failures in important steps in the manufacture of the device which may have contributed to the appearance of the crack.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): marlon fábio marques lino (ANGLO AMERICAN), RICARDO COUTINHO OLIVEIRA (ANGLO AMERICAN), KELLSON TAKENAKA MENEZES (ANGLO AMERICAN)
Abstract:
The present work deals with the application of a new conditional predictive maintenance technique, using infrared thermography, to monitor the life of the vertical windmill propellers of the Minas-Rio project, presenting an innovative inspection method, where a a thermographic behavior standard that indirectly defines the condition of wear of the propeller linings, thus being able to define the ideal moment for the replacement of the linings, guaranteeing the reliability of the equipment, the budgeted cost and the performance of the coating. Currently we have established a monitoring routine applying the technique of thermographic inspection, where from the collected data a report is generated that defines for PCM the ideal sequence for changing the coatings.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): RICARDO OLIVEIRA COUTINHO (Anglo American), Mario Cesar Castro ARRUDA (Anglo American)
Abstract:
This article presents the asset management methodology applied to wear materials through conditional monitoring in critical equipment such as ball mills and roller presses in order to guarantee the agreed physical availability and to remain sustainable. Through Conditional Monitoring we can efficiently define the ideal moment for intervention in the equipment. In the ultrasonic test sound waves with frequencies above 20 kHz generated from an electronic device are sent through the test material. In the total or partial interruption of these waves due to internal discontinuity points of the part one part is reflected and another is refracted. The analysis of the reflected plots provides information between the final surface of the coating of the body of the coated equipment. With the application of this predictive technique, we are collecting significant results in relation to the predictability of maintenance, seeking greater efficiency of the coating guaranteeing the budgeted cost and the reliability of the equipment, to reach the annual production goal of 26.5 million tons.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): Gustavo Henrique Sousa (UFMG), IGOR CUZZUOL dos santos (UFMG), ATHOS FERNANDES ARAUJO (UFMG), Jorgimara de Oliveira Braga (UFMG), Guilherme Vitor de Araújo (UEMG), Marcelo Alves Fonseca (UEMG)
Abstract:
The main goal of this study is the use of processes for a quick evaluation and diagnosis of metallic materials mixtures in steel companies, bring an efficient and better control of the company inventory. In order to reach the study goals, spark tests were carried out on four types of steel, cast iron and brass, where their main spark characteristics were analyzed, aiming the optimization in the separation of these metallic materials. The methodology is proved to be an important tool because the results of materials separation presented to be efficiently, speedily and reliably. In this way, there is a better understanding and reliability of the spark processes to be use in the diagnose of separate mixtures of metallic materials in steel companies’ inventories.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): filipe estevão de freitas (unifesp), Adriano Gonçalves dos Reis (unesp), Aline Capella de Oliveira (unifesp), Danieli Aparecida Pereira Reis (unifesp)
Abstract:
Thermal barrier coatings (TBCs) have been used for oxidation protection in hot sections of gas turbine engines components. One technique that has been investigated to increase the live time and working temperature of these components is the laser remelted on TBC. The aim of this work was the investigation of different CO2 laser parameters for remelting of the TBC yttria-stabilized zirconia on Ti-6Al-4V substrate. The samples were analyzed by optical microscopy and, after comparative examination, the chosen parameters were evaluated by thermogravimetric analysis and discontinuous oxidation and, finally, the sample that obtained the best result was characterized by optical profilometry and X-ray diffraction. Laser treatments with energy density of 1.05 J/mm2 and 2.47 J/mm2 showed more uniform layers and smaller amounts of surface defects, with a treated layer thickness of ~35 μm and ~56 μm, respectively. The sample remelted with 1.05 J/mm2 presented better oxidation resistance, with a considerable reduction of the surface roughness and an increase of t'-phase, which is phase that provides a higher tenacity to the ceramic layer; indicating a promising treatment to improve the mechanical behavior of the alloy with TBC at high temperatures.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): GLAUDISTONI DA SILVA FELIX (ArcelorMittal Vega)
Abstract:
This paper is aimed at the chemical stripping and cold rolling (PLTCM) processes, whose main objective is to characterize and classify the surface dirt defect (0SUJ) in the roller equipment by means of qualitative and quantitative methods. In this way, all the imperfections that may be present on the surface of the steel sheet are understood as surface defects. In this way, all the imperfections that may be present on the surface of the steel sheet are understood as surface defects. However, as the focus of this experiment is 0SUJ, it will be restricted to the main generating points in the sections of the studied process, that is, presence of particles agglomerated and adhered to the surface of the strip, resulting from printing the of during rolling.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): JOSÉ QUINZINHO DE MEDEIROS NETO (ufrn)
Abstract:
Transparent Conductive Oxide (TCO) is a semiconductor and an important component in many transparent electronics such as flat panel monitors, light emitting diodes, thin film transistors, thin film solar cells and etc. (Ohta et al. Levy et al., 2008, Park et al., 2009). The TCOs have optical transparency greater than 80% in the visible region and low electrical resistance (around 10-4 - 10-3 Ω.cm). Among the various thin films of TCO are tin-doped indium oxide (ITO) which has been viable for a long time. However, recently many researchers have been working on developing a substitute for the ITO because the Indian is a rare and expensive element, making the cost of producing ITO very high. Thus, impurities-doped zinc oxide (ZnO) films have been an alternative candidate for ITO because, unlike ITO, ZnO is a non-toxic, inexpensive, abundant material and is chemically stable. In addition, it has a gap energy of 3.3 eV, low resistivity, high transparency, high transparency in the visible range and good light capture characteristics
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): THAÍS DA SILVA LEITE GARCIA (Centro Universitário de barra mansa)
Abstract:
With the development of new technology and great environmental concern, new sustainable processes capable of generating a lower environmental impact have been evaluated. In this field is the nanoceramic treatment as substitution for treatment of the steel surface by means of the phosphatization. The phosphating process presents in its composition metals classified as dangerous, consuming high level of water, energy and gas. The nanoceramic process is free of heavy metals, reduces the consumption of resources and has less processing time under the substrate.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): Andersan dos Santos Paula (iNSTITUTO mILITAR DE ENGENHARIA), Clara Beatriz Melo Moreira Caminha (iNSTITUTO MILITAR DE ENGENHARIA), Claudio José Ferro de Sá Ferreira Vasconcelos (instituto militar de engenharia), Gabriel Fernandez Santos (INstituto militar de engenharia), Harllon Oliveira da Paz (instituto militar de engenharia), Landerman Guimarães Lima (instituto militar de engenharia), Tales Chaves Bezerra Rocha (instituto militar de engenharia), Rodolfo da Silva Teixeira, Andrey de Moraes Barcelos Casanova (instituto militar de engenharia), Naiara Vieira Le Sénéchal, Thiago Henrique Fernandes Dias Ferrão (instituto militar de engenharia), patrícia freitas rodrigues, talita gama de sousa (instituto militar de engenharia)
Abstract:
This paper focus on the production’s viability of equiatomic NiTi alloy and ternary Ti44-Ni47- Nb9 alloy, which has shape memory, based on Ti, Ni and Nb elemental powders, using conventional sintering based on the literature. The process started with a simple mix in ball mill, pressing and conventional sintering with argon flow and under 1050 °C per 4 hours, with 10 °C/min heating rate, and finally freezing with furnace thermal inertia. The analysis of macrostructural results shows more pores for the ternary alloy. On the other hand, the results of the scanning electron microscopy, in addition to the results of the X-ray diffraction, show that both alloys have homogeneous microstructure with a metallic matrix based on NiTi, in addition to precipitates (Ni3Ti2 and Ti2Ni) and oxides (Ti2O) formation in both alloys and TiNb precipitates on the ternary alloy, but without pure Nb on its structure.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): andré rosiak (LDTM-UFRGS), ARTHUR Körbes (UFRGS), Gilceu dos Santos Cardoso (LDTM-UFRGS), LUANA DE LUCCA DE COSTA (LDTM-UFRGS), Diego Pacheco Wermuth (LDTM-UFRGS), Alexandre da Silva Rocha (LDTM-UFRGS)
Abstract:
This work has the general objective to use a powder of aluminum with high purity and low granulometry, to obtain good mechanical properties in conventional and plasma assisted sintered samples. A powder with a very low amount of impurities that could affect the compaction and sintering conditions was chosen. A compressibility curve of this powder was obtained experimentally to find out its ideal compaction pressure. After compaction, the compacts were sintered in a conventional process with a positive pressure of Nitrogen and in a vacuum nitrogen plasma assisted process. The obtained samples were investigated for densification, hardness, microstructure and surface roughness. In both processes the sintering was effective. The plasma process was able to produce the lowest reduction of densification and the highest surface hardness in the samples. The conventional process was able to produce the highest internal hardness and the lowest surface roughness in the samples.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): bianca nathália andrade de souza (UNINASSAU pe), elizeth oliveira alves (uninassau pe), daniel ricardo araújo amaro (uninassau pe)
Abstract:
IN result of the continuED development of science and technology, the materials used in large industries are available with features. As metal alloys they work with a harmonization of two or more elements, combining their properties and obtaining a more effective product. Therefore, this work aims to produce and study a program that meets the needs of industries, mainly, such as transportation and aerospace, an Aluminum-Copper (AA-Cu) AA 2014 alloy, also known as Duralumin. They were made with samples of copper, they are: Al4% Cu, Al5% Cu and samples of Al 1100, without addition of copper, for comparative purposes. The alloy was produced by Powder Metallurgy (MP) techniques. The powders were processed through the High Energy Grinding (MAE) in SPEM, after being compacted uniaxially in the cold and sintered in a muffle furnace. The samples were evaluated by the Vickers Microhardness test, not qualifying as the dose increase is directly proportional to the amount of copper present in the samples. Also, they were submitted to the Optical Microscopy test for the characterization of the alloys, where the microstructures and morphology of the grains were evaluated.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): diego pacheco wermuth (ufrgs), André rosiak (ufrgs), Luana de Lucca de Costa (ufrgs), Letícia Dupont Silva (ufrgs), lirio schaeffer (ufrgs)
Abstract:
Competitiveness in the manufacturing market is increasingly intense and the requirement to produce components with complex shapes and extremely high performance has led to the development of new materials and manufacturing processes. Therefore, by combining the advantages of the forging process and powder metallurgy, the sinter forging process has been gaining more and more space in the world industry. This process, developed 5 decades ago, makes it possible to obtain components with higher performance to those produced by other manufacturing processes. Thus, the study aims to present this modern technology with great potential, elucidating the main factors that involve the process and exposing recent research on the subject.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): Edson silva do nascimento (UFRN), kivia fabiana galvão de araújo (ufrn), Maria José Santos Lima (ufrn), Uilame Umbelino Gomes (ufrn), Meysam Mashhadikarimi (ufrn)
Abstract:
Currently the technology industry is constantly looking to reduce the size and weight of its products, which is possible only by reducing the internal components of these electronic devices, the capacitors are an example of this. The tantalum capacitor presents a high specific capacitance, allowing to store large amount of energy in small volume when compared with the other types of capacitors. Before the difference in availability between Niobium (Nb) and Tantalum, as well as the similarity in the properties of these elements, it is increasingly attempted to substitute niobium powder for the application of electrolytic capacitors. Obtaining the Nb powder having downsizing of particle and high purity can occur, for example, through the Hydrogenation-Dehydrogenation (HDH) process. In this work the hydrogenation of the Nb powder at temperatures of 800 and 850 ° C was carried out to weaken the particles and then the same powder was subjected to grinding. Powder characterizations were performed by means of SEM and particulometry analyzes, thus ensuring that hydrogenation followed by milling provided a reduction in the average particle size of approximately 86%, thus concluding that it was a viable method for the increase the surface area of Nb powder, improving the electrical properties of the electrolytic capacitors produced by powder metallurgy.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): herik dantas de lima (ufrn)
Abstract:
Several materials are currently used for the production of electrical contacts, heat sinks and coils with characteristics similar to those of the Nb and Cu alloy studied in this work. The phase diagram of Nb and Cu shows that there is no solubility at room temperature between these two elements, thus making it difficult to form a refractory metal composite between these two elements, and due to this reason, the powder metallurgy was the route of processing used to perform this work. Nb and Cu powders containing 15% by mass of Cu and then ground by MAE in a planetary mill were prepared for 5 hours (without cryogenicity) and 26 hours (cryogenic). Thus, the objective of this work is to analyze by MEV FEG and EBSD, the influence of the grinding route and the sintering pressure on the hardness of the samples consolidated by SPS (Spark Plasma Sintering) at a temperature of 1100 ° C, for a possible application in electrical contacts. The highest hardnesses were for the bodies consolidated from the powders which were crushed through cryogenics for 26 hours and sintered with higher sintering pressure. These results are in agreement with the results of EBSD obtained
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): Marina furbino martins (redemat)
Abstract:
The present work aims to study the structural behavior of the metal matrixes 25%Fe-50%Cu-25%NbH obtained by hot pressing due to different sintering temperatures. The metallic powders were mixed and then hot-pressed, with the following sintering parameters: 35MPa, 3min and 750°C/850°C/950°C. The sintered materials were analyzed by SEM and EDS to evaluate the microstructure resulting from the process of sintering metal matrix and the effectiveness of the sintering between Fe, Cu and NbH elements. The results showed Fe, Cu and Nb phases and a heterogeneous distribution, with no occurrence of segregation in the material. As the sintering temperature increased, a higher interaction between the Fe, Cu and Nb elements was observed, especially in the grain boundaries through in-line EDS microanalysis. The SEM technique is advantageous for morphological, topographic and observation of regions with different chemical compositions due to the atomic weight. In microanalysis by EDS, the results are semiquantitative and semiqualitative and may indicate the presence of stoichiometry related to the presence of a possible phase (microanalysis point) that can be confirmed with X-ray diffraction analysis.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): raysa cristiano paulino pereira (UFRN), Thercio henrique de carvalho costa (UFRN)
Abstract:
It is desired to analyze the porosity, pore geometry and grain growth in AISI 316L steel compacted under different pressures in order to evaluate the densification of the samples sintered and to evaluate the influence of these parameters in the tests of apparent hardness and microhardness. AISI 316L steel sintering was carried out in a plasma reactor using the hollow cathode technique under an argon atmosphere, with a sintering time of 30 minutes and an apparent isotherm temperature of 730 °C. Samples were previously cold compacted at different pressures (555MPa, 655MPa, 700MPa, 750MPa and 800MPa) using a double-effect unidirectional matrix. After metallographic preparation, the porosity of the samples were evaluated, grain growth for samples compacted at different pressures were compared, and tests of apparent hardness and microhardness were performed. The results showed that compressed samples at higher pressures presented geometry of spherical pores, smaller and better distributed along the sintered ones. This effect influenced the growth of the grains, the results of apparent hardness and microhardness.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): AMILTON barbosa BOTELHO JUNIOR (ESCOLA POLITECNICA DA USP), denise crocce romano espinosa (ESCOLA POLITECNICA DA USP), jorge alberto soares tenório (ESCOLA POLITECNICA DA USP)
Abstract:
Scandium, like other rare earths, is considered a critical metal, due to Chinese control in production and low possibility of substitution. As a result, it is necessary to search for different sources for this metal. The main source of scandium in the world are the residue from the Bayer process - red mud. For this reason, the present work has the objective of the study of the extraction of metals by hydrometallurgical route. FactSage 7.2 software was used to study the solid phases that can be obtained during leaching. Results showed a correlation between scandium and zirconium extraction with iron leaching, which may indicate that some of these metals are trapped by the crystalline iron structures in the residue. DRX analyzes were in agreement with the simulations carried out, which indicates that it can be an important tool in the leaching study. Still, the results were simulated to those found in the literature.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): andré rosiak (ldtm-ufrgs), Luana de Lucca de Costa (ldtm-ufrgs), Alberto Moreira Guerreiro Brito (ldtm-ufrgs), Lirio Schaeffer (ldtm-ufrgs)
Abstract:
The flow curve of a material is indispensable for determination of working conditions in metal forming processes. It can be determined from several mechanical tests such as tensile, torsion and compression tests under several conditions which depend on the characteristics of application of the material. Herein, the test of compression of stacked discs is presented. The tool called warm cup are designed and heated to the same temperature of the samples raising the test at the quasi-isothermal condition.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): bruna elisa costa (UNIVersidade FEDeral DE OURO PRETO), matheus mello pereira (UNIVERSIDADE FEDERAL DE OURO PRETO), versiane albis leão (UNIVERSIDADE FEDERAL DE OURO PRETO)
Abstract:
Recycling of Waste Electrical and Electronic Equipment (WEEE) is a worldwide challenge and has become a critical environmental issue. Printed Circuit Boards (PCB), which are composed of toxic materials as well as base and noble metals, constitute about 5% of the total electronic scrap generated. Solvent Extraction (SX) is one of the most widely used separation techniques due to its simplicity, fast kinetics and low environmental impact. In this sense, the objective of the current work was to present a critical review on the subject and to describe cases in which SX was applied in the selective separation of copper from liquors produced during PCB leaching. The applied set-up comprised four main steps: (i) identification, (ii) search, (iii) selection and (iv) analysis. From the searches, a volume of 17,297 articles were retrieved, and only eight (8) papers were considered relevant for the current research. In summary, among the selected studies, it was observed that with copper recoveries higher than 90% in two or three separation stages.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): Daniel Aquer de Miranda Almeida (Universidade federal do ceará), eric fortunato soares lima (universidade federal do ceará), Leandro Rodrigues Ribeiro (UNIVERSIDADE FEDERAL DO CEARÁ), Pedro Chaves Vieira (UNIVERSIDADE FEDERAL DO CEARÁ), Roberto Abreu Alencar (UNIVERSIDADE FEDERAL DO CEARÁ), Marcelo José Gomes da Silva (UNIVERSIDADE FEDERAL DO CEARÁ)
Abstract:
Duplex stainless steels have good mechanical properties and excellent intergranular corrosion resistance, which makes them suitable in hazardous environments and used mainly in the chemical and petrochemical industry. The objective of this work is to trace the amount of precipitation of intermetallic sigma phase of SAF 2205 steel in certain conditions of temperature and time. Thus, to analyze the behavior of the micro hardness predominantly in the sigma phase in the material according to the amount of the precipitate. Therefore, it was observed that there is a direct relationship between the increase of the micro hardness and the percentage of the Sigma phase in the material composition.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): Daniel dos Santos Silva (Escola politécnica), Jorge luís coleti (escola politécnica), eduardo junca (UNESC. Criciúma), Jorge Alberto Soares Tenório (escola politécnica)
Abstract:
The industrial process generatesdifferent types of solid waste. In the paper and cellulose sector, a residue that stands out is lime mud, composed majority by calcium carbonate. This carbonate could be used as lime source in the desulfurization process of hot metal,resulting in an innovative and environmentally beneficial destination to the residue. Then, the objective of this work is to explore the use of lime mud in the hot metal desulfurization process aiming the residue valorization. For that, the residue was characterized by x-ray fluorescence (EDXRF). It was formulated mixtures with lime mud and 7% and 9% of fluorspar. The experiments were conducted at temperatures of 1450°C, 1500°C and 1550°C. Thermo-calc software was used to quantifies the proportion of liquid and solid phases in the mixtures. In order to evaluate the hot metal desulfurization, aliquots weretakenat times of 3, 6, 12 and 24 minutes after the addition of the desulfurizing mixture in the bath.The results showed that the lime mud has 55,12% of CaO and 42,8% of loss on ignition. The greatest efficient reached was 88% corresponding to the mixture containing 9% of fluorsparat 1550°C. These results indicate that lime mud may be applied as a hot metal desulfurizing agent
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): Dário Freire Arrais (Universidade FEDERAL DO CEARÁ), Gilvania Katia Cruz Pinheiro (UNIVERSIDADE FEDERAL DO CEARÁ)
Abstract:
CA 60 rebars produced by cold forming processes are the main products used in the construction industry. And industries are currently seeking more and more productivity at a lower cost, and for that, studies are needed in the area in order to obtain a product with an increasingly better quality that meets the norms and requirements of the market, which in the case of CA 60 rebar it is the norm NBR 7480: 2007. For this reason, the objective of this work was to evaluate the influence of the conformation velocity on the mechanical and microstructural properties of SAE 1013 steel used in the production of CA 60 rebar. The base of this study was the tensile test of SAE 1013 steel subjected to 2 forming processes: cold rolling and drawing with three different forming speeds each. In this study, values of Resistance Limit, Flow Limit and Deformation were obtained. The values of these properties ranged from 470 to 784 MPa, for the tensile strength limit, and from 332 to 744 MPa, for the flow limit, approximately.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): Gustavo Henrique Sousa (UFMG), Igor cuzzuol dos santos (ufmg), Jorgimara de Oliveira Braga (ufmg), Loyslene Rabelo Fernandes (ufmg), Athos Fernandes Araujo (ufmg)
Abstract:
The recovery of metals has attracted interest by virtue of new and different technologies that aim at the reuse of these chemical elements in new productive processes. The recovery of manganese from blast furnace slag is an alternative for the reuse of this metal. The objective of this work was to evaluate the use of a hydrometallurgical route for the treatment and recovery of manganese present in blast furnace slag. The hydrometallurgical route for recovery of manganese involved the grinding of the slag and leaching in acid medium using a 2 molar hydrochloric acid solution (HCl) for 1 and 4 hours. The results of leaching were characterized by Atomic Absorption Spectrometry (AAS) in order to obtain the recovered manganese content of the leach and to analyze the time variation of each sample in HCl solution. The results indicated the possibility of recovery of 15.76% of manganese
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): LETICIA MARIA DE MELO SILVA CHELONI (UFOP UNIV FED. DE OURO PRETO -), michael leonardo marques rodrigues (universidade federal de ouro preto), versiane albis leão (universidade federal de ouro preto)
Abstract:
Chalcopyrite concentrates are mainly treated by pyrometallurgical routes, in view of the refractoriness of the mineral in ferric sulphate solution - more widely applied industrially. Pretreatment steps, such as sulfurization, have been proposed with the objective of increasing copper extraction in the leaching step. This approach is particularly suitable for chalcopyrite concentrates with high levels of deleterious elements for pyrometallurgical operations, such as fluorine and arsenic. In the present work, reactions were investigated among chalcopyrite concentrates and elemental sulfur, with emphasis on temperature, reaction time and proportion of chalcopyrite and elemental sulfur as parameters that influence the conversion of chalcopyrite into leachable phases. In addition, values of copper extractions obtained by the different transformed sulphides were approached and compared with extractions from chalcopyrite.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): livia Ananias dos SANTOS MANGUALDE (UNIVERSIDADE FEDERAL DE MINAS GERAIS), Vicente Braz Trindade (UNIVERSIDADE FEDERAL DE OURO PRETO), Júlio Márcio Silveira e Silva (vallourec soluções tubulares do brasil), Vicente Tadeu Lopes Buono (UNIVERSIDADE FEDERAL DE MINAS GERAIS)
Abstract:
The goal of this work is to evaluate the influence of silicon addition on the deoxidizing powder on the incorporation of phosphorus in a C-Mn steel during hot rolling of seamless pipe. For that, some CVN specimens were dipped in deoxidant powder baths that contain phosphorus in their composition, others were dipped in deoxidant baths than contain phosphorus and silicon in their composition and others were not dipped in deoxidant powder baths. It was observed that the deoxidant powder that contain silicon, have a protective barrier in the steel, mainly faialite, that making more difficult the incorporation of phosphorus in the steel. Therefore, deoxidant powders that do not have silicon tend to form fracture that is more intergranular. The thickness of the layer of eutectic phosphorus (Fe3P) and dissolved phosphorus in this steel substrate is higher, too.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): Lourdes Amélia Pinto (Centro de inovação e tecnologia senai fiemg), Diana Perez Escobar (CENTRO DE INOVAÇÃO E TECNOLOGIA SENAI FIEMG), Olívia de Souza Heleno Santos (CENTRO DE INOVAÇÃO E TECNOLOGIA SENAI FIEMG), Rodrigo Ribeiro de Andrade (CENTRO DE INOVAÇÃO E TECNOLOGIA SENAI FIEMG), José Rubens Gonçalves Carneiro (CENTRO DE INOVAÇÃO E TECNOLOGIA SENAI FIEMG)
Abstract:
One of the main difficulties in the characterization of multiphase steels is the identification and quantification of the phases present. This work aimed to identify and quantify the retained austenite fraction in TRIP steel, in addition to verifying the best metallographic preparation methodology. X-ray diffraction (XRD) and backscattered electron diffraction (EBSD) methods were used to identify and quantify retained austenite. It was possible to observe the difference between the methods of analysis adopted concluding that the XRD technique is more reliable for quantification of retained austenite and the preparation by electrolytic polishing is the best methodology of sample preparation for EBSD.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): Saulo Brinco Diniz (CEFET-RJ), CAROLINA ALENCAR CALDEIRA DE SOUZA (CEFET-RJ), KAIO FERREIRA DOS SANTOS (CEFET-RJ), RAFAEL OLIVEIRA SANTOS (CEFET-RJ), BRUNA GODOI MEIRELLES (CBA), MIGUEL BORODIAK (CBA)
Abstract:
The Friction Stir Processing (FSP) promotes the microstructural changes (and this is directly linked to the parameters used) of a metal sheet, due to heating and localized plastic deformation due to the passage of a tool that rotate with a constant speed. The objective was verify the influence of the rotation speed and processing passes on a 1050 aluminum sheet with 3.1 mm of thickness. Images were taken from macro evaluation of the processed plates, and microstructural analyzes were carried out by polarized light. According to the results, it can be verified that the sequential passes bring better results, and with the other FSP parameters used, the rotational speed of 980 rpm presented a better macro and microstructural result.
Plenary
10/1/19, 10:15 AM - 10/1/19, 11:05 AM
Presenter(s): VICTOR BARBOSA DE SOUZA (UFF / UENF / UNIREDENTOR), Yuri Freitas da SIlva ALmeida (UFF / UENF / UNIREDENTOR), Tiago Homero Murro (UFF / UENF / UNIREDENTOR), Aloísio Costa Vieira Júnior (UFF / UENF / UNIREDENTOR), Amanda Camerini lima (UFF / UENF / UNIREDENTOR), daniel passos gallo (UFF / UENF / UNIREDENTOR), Afonso garcez rangel (UFF / UENF / UNIREDENTOR)
Abstract:
Cutlery and handicrafts have been gaining a great deal of room in the economy. This moves the market of microentrepreneurs, increasing the demand for the perfection of the cutters, that aim to provide the best product to its customers. Although the cutlery is very widespread on selective tempering, there are no specific studies on its superiority in relation to integral tempering. The present work seeks to analyze the obtained properties of the forged and machined slides, varying the tempering process. Through the literature review, we studied the history of the blades and the mystique that involves their manufacturing process. Preliminary tensile, flexural and matalographic tests were performed to obtain the characteristics for the comparison with the finished samples. Where a total of eight blades were forged and eight blades were machined, after manufacture they went to standardization, quenching and tempering heat treatments. The regulatory standards for the hardness and flexural tests of the sixteen blades were used. The results obtained showed that the manufacturing process and the heat treatment directly influence the final product result. It was concluded that forged blades using integral tempering are superior in flexural strength than machined blades
Closing
10/1/19, 10:45 AM - 10/1/19, 11:00 AM
Presenter(s): Cristiane Gonçalves, Application Engineer
Abstract:
Plenary
10/1/19, 11:05 AM - 10/1/19, 11:30 AM
Presenter(s): daniel bastos martins cruz (tmt / paul wurth)
Abstract:
The latest generation of probes and casthouse machines provide a wealth of data that has not been available a few years ago. The evaluation of this data gives direct feedback to improve the blast furnace efficiency, the equipment maintenance and design and it allows the early detection of critical or deviating process situations. A stable operation with lower operation and maintenance costs are the final customer benefits
Plenary
10/1/19, 11:05 AM - 10/1/19, 11:30 AM
Presenter(s): DONIZETE GONZAGA DE MEDEIROS (CSN MINERAÇÃO), CHRISTIAN DEINER DUTRA (CSN MINERAÇÃO), MATEUS BARBOSA DE MORAES RODRIGUES (CSN MINERAÇÃO), SILVIO SERGIO LOPES SAIAO (CSN MINERAÇÃO)
Abstract:
Faced with the need to reduce the cost of maintenance and the consumption / disposal of lubricants and filters. Actions directed at operating cost and environment. A study was carried out to verify the possibility of extending the useful life of the lubricant applied to the diesel engine of the fleet of trucks Mercedes Benz Actros 4844 - model OM501LA. To begin the study, the analyzes and results of the predictive reports of the fleet were verified, where it was confirmed that there were no changes in the samples taken with 500 hours, allowing the test / study to be applied to the application of the new periodicity of oil change and filters. Based on this information, 5 trucks / motors with variable useful lives were chosen for the test application. The service life of these engines ranged from +/- 200 to 16,000 hours. The study was carried out in two cycles of 1,000 hours, with detailed monitoring from the 500 hours of operation (normal periodicity) and the results were satisfactory allowing the increase of the useful life of the motor oil to 750 hours. This work enabled a 33% reduction in the cost of lubricant and engine oil filters, a 0.2% increase in the physical fleet availability of 96 trucks, and environmental gain with the reduction in the acquisition and disposal of contaminated oil and filters. Another gain that the study provided was the adequacy of the workshop load without the need to increase the workforce.
Plenary
10/1/19, 11:05 AM - 10/1/19, 11:30 AM
Presenter(s): Norbert Asamer (Braun Maschinenfabrik GmbH)
Abstract:
Depending on the product or the material grade, conventional deburring machines, such as e.g. with rotating hammers , are in many cases not capable to reliably or completely remove burrs from the edges of a continuously cast product. Burr, however, is generated at the front and/or tail ends of a slab, bloom or billet as a result from torch cutting. Likewise, traversal grinding of the slab’s rolling surfaces can also cause burr at the long side edges of the slab whereby such burr can even be more difficult to remove. Based on their experience and know-how with abrasive machining processes (abrasive cutting, high-pressure grinding) over a period of more than 50 years up to now, BRAUN has developed a highly flexible deburring grinding machine for applica¬tions which are too difficult for conventional deburring techniques. BRAUN’s deburring grinding machines were successfully introduced to the steel industry and have proven their worth under normal production conditions already. The subject paper describes the key features and advantages of BRAUN’s machine design and the operational re¬sults from the first already completed projects.
Plenary
10/1/19, 11:05 AM - 10/1/19, 11:30 AM
Presenter(s): WILLIAN DOS REIS LIMA (LUMAR METALURGICA LTDA)
Abstract:
Usiminas steelworks has 03 BOF converters with 76 metric tons each. The intent to eliminate the human intervention in activities of cutting mouth skull, keep converter mouth in good conditions keep successful in charging of scrap metal and hot metal. This way to achieve the listed objectives, beside also to ensuring and improving operational stability during the blowing stage in steel production, a series of developments in the oxygen Lance was started through the application of Slagless Clean Up® technology. After the end of the testing period, the results showed great success with the use of Slagless Clean Up® technology, all the proposed objectives were achieved. In addition, the technology reaches a record life (for the plant) of 1770 hearts in Aciaria 1 of Usiminas Ipatinga.
Plenary
10/1/19, 11:05 AM - 10/1/19, 11:30 AM
Presenter(s): anderson nicolodi (laboratório de siderurgia - ufrgs), anderson azevedo agra (LABORATÓRIO DE SIDERURGIA - UFRGS), bruno deves flores (LABORATÓRIO DE SIDERURGIA - UFRGS), guilherme liziero ruggio da silva (gerdau açominas), antônio cezar faria vilella (LABORATÓRIO DE SIDERURGIA - UFRGS), eduardo osório (LABORATÓRIO DE SIDERURGIA - UFRGS)
Abstract:
Coke microstructure can be defined as the spatial relationship between coke matrix and pores and it is formation occurs during the coal carbonization process. Understanding which parent coal properties rules the microstructure formation allow us to better estimate which changes in the coal blend could improve coke’s quality. Laboratory cokes were produced by coals with different properties aiming to evaluate a large range of coke microstructure parameters. Coke microstructure characterization was carried out with an image analysis tool. The influence of the parent coal properties in the microstructure parameters was then evaluated. The results were also compared with the predicted in other coke quality models (MOF and CBI). It was seen that high-volatile coals with high thermoplastic properties produce cokes with high porosity and large pore size. Coals with high inert content produce cokes with low porosity, small pore size, but unsuitable pore shape. The most suitable coke microstructure was produced with parent coals showing the best properties under MOF and CBI criterion.
Plenary
10/1/19, 11:05 AM - 10/1/19, 11:30 AM
Presenter(s): DANIEL MAPA CLEMENTE (REDEMAT), Ana Rosa Rabelo de Lima (University of Duisburg-Essen), Rüdiger Deike (University of Duisburg-Essen), Carlos Antônio da Silva (UFOP)
Abstract:
Minerals containing Tantalum and Tin are considered conflict minerals, once the mining, transport or export of these ores have been related to financing of abuses to human rights or armed conflicts. In this scenario, corporate organizations and policy makers are constantly working on new regulations and requirements, in order to prevent companies from financing these issues. As consequence of these necessary efforts, the supply chain of tantalum and tin is already being affected and there may be a limitation of raw material availability for companies worldwide. Companies must adapt to new requirements while also looking for alternative materials such as secondary materials and/or byproducts of tantalum and tin the world and in Brazil, the necessary changes that Brazilian companies must go through considering this evolving scene and the possibilities for the metallurgical recovery of tantalum and tin from byproducts in Brazil. This recovery can help to enhance production levels, while not contributing to the financing of the described abuses.
Plenary
10/1/19, 11:05 AM - 10/1/19, 11:30 AM
Presenter(s): Priscilla messias pereira (VALE), Alex Dalapicola Veronez (VALE), Leandro Resinentti Zanon (VALE), Wellington Bonelar dos Santos (VALE), Maurício do Santos Rocha Junior (VALE), Renato Batista Faria Junior (VALE), Rodolfo Ribeiro de Souza (VALE)
Abstract:
The pelletizing process allows inputs to be added to the mixture resulting in better control of the physical, chemical and metallurgical characteristics desired by the pellet. Anthracite is incorporated as input of the pellets as an alternative form of fuel, making the burning more homogeneous, "from the inside out", benefiting the physical resistance of the burned pellets and aiming to reduce the cost of natural gas during the stage of hardening. However, the amount of anthracite should not exceed an optimum value, which may cause an adverse effect on the physical quality of the pellets. Hence, it is very important an accurate control of the coal dosage. Based on that, the present work presents the implementation of a control using advanced control system that applies, using linear regression of historical data, the optimum relationship between anthracite and ore (respecting the physical quality of the pellets during processing in pelletizing furnaces). After the implementation of this control, it was possible to adjust the anthracite dosage automatically, measured in percentage of fixed carbon in the mixture, when the process is able, thus reducing the specific consumption of natural gas.
Plenary
10/1/19, 11:05 AM - 10/1/19, 11:30 AM
Presenter(s): suelen silva rocha (universidade federal do rio grande do sul), jorge luiz valença mariz (UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL), marinésio pinheiro de lima (universidade federal de pernambuco), Filipe brito marinho de barros (UNIVERSIDADE FEDERAL DE PERNAMBUCO), gabriel filinkoski (universidade federal de pernambuco), daniela mota paschoal veloso da silva (universidade federal de pernambuco)
Abstract:
Predicting rock fragmentation is essential to optimize the blasting rock operation. Fragmentation depends on many parameters, such as structural and geomechanical properties of rocky massif, blast plan geometry of detonations and properties of explosives. In this context, the objective of this work is to predict fragmentation by simulation of Mineração Megaípe blasting rock considering the structural and geomechanical characteristics inherent to the rocky massif formation through the Kuz-Ram methodology. The methodology consisted in the survey of the geometric properties of the visible discontinuities on the face of the bench, accomplishment of the geomechanical classification through the Rock Mass Rating (RMR) and Q systems and application of the results to prediction of the granulometric distribution of fragmentation. It was obtained as a result of the simulation that about 90% of the fragmented material should pass through the gap of the primary crusher available in the quarry, in addition to favorable results for analyzes of operational slope stability conditions
Plenary
10/1/19, 11:05 AM - 10/1/19, 11:30 AM
Presenter(s): carolina carvalho nunes (Nexa resources), Lucas monteiro corrêa e lopes (nexa resources), Nathalia Luiza Nascimento de Carvalho (Nexa Resources)
Abstract:
The characteristics of each ore make it impossible to predict the quality of a flotation concentrate without exploratory tests. The research begins with laboratory batch tests, and then, after advances in the determination of process conditions, the complexity of the tests increases in order to evaluate new parameters. The closed cycle test (LCT) simulate circuits with load recirculation and the greatest difficulty of this test is to stabilize the circuit and achieve equilibrium. Depending on mass availability, the types of tests that offer the highest reliability and informations about flotation in an ongoing process are mini-scale or pilot-scale tests. This work aimed to compare the results of the flotation tests in three scales (batch test, LCT and mini pilot) for the Bonsucesso ore, a new deposit in mineral research, owned by Nexa Resources, that has sphalerite, zinc ore, and galena, lead ore. In the open flotation circuit of galena was obtained 27.57% content with 26.70% recovery, in the LCT test the content was 31.54% with 64.64% recovery and in the mini pilot reached 51.22 % content with 65.51% recovery. In the open sphalerite flotation the zinc content was 55.51% with 77.35% recovery, in the LCT test the zinc content was 56.71% with 84.42% of recovery and in the mini pilot of 50.02% content with 94.54% recovery.
Plenary
10/1/19, 11:05 AM - 10/1/19, 11:30 AM
Presenter(s): Thácylla Jamille MECENAS DE JESUS (Universidade federal de sergipe), brendon costa barreto (Universidade federal de sergipe), Michelle Cardinale Souza Silva Macedo (Universidade federal de sergipe), Sandra Andreia Stwart de Araújo Souza (Universidade federal de sergipe)
Abstract:
In this study, the influence of the yttrium and titanium elements on the microstructure and mechanical properties of Fe-25 Cr, Fe-25 Cr-0.2 Ti and Fe-25 Cr-0,2 Y alloys compared with stainless steel 430 were investigated. the microstructural and mechanical characterization of the alloys was carried out through the techniques of Optical Microscopy, Scanning Electron Microscopy, X-ray Diffraction, Dispersive Energy Spectroscopy, X-ray Fluorescence, Optical Emission Spectroscopy and Vickers Hardness Testing. The results showed that the low concentration of the elements Ti and Y had little influence on grain refining. In addition, the alloys produced in this study presented higher hardness than the commercial alloy (430 stainless steel). However, when compared between them, it is noticed that the alloy Fe-25 Cr presents the highest value.
Plenary
10/1/19, 11:05 AM - 10/1/19, 11:30 AM
Presenter(s): PATRICIA FREITAS RODRIGUES (IME Instituto militar de engenharia), Andersan dos santos paula (IME - instituto militar de engenharia), Rebeca Vieira de Oliveira (IME - INSTITUTO MILITAR DE ENGENHARIA), Eduardo Hoisler Sallet (IME - INSTITUTO MILITAR DE ENGENHARIA), Talita Gama de Sousa (IME - INSTITUTO MILITAR DE ENGENHARIA), Rodolfo da Silva Teixeira (IME - INSTITUTO MILITAR DE ENGENHARIA), Naiara Vieira Le Sénéchal (IME - INSTITUTO MILITAR DE ENGENHARIA), Danilo Abílio Correa Gonçalves (IME - INSTITUTO MILITAR DE ENGENHARIA), Paulo Inforçatti Netto (TECNOHOW - Engenharia Industrial e Comércio Ltda), Jorge Vicente Lopes da Silva (Centro de Tecnologia da Informação Renato Archer)
Abstract:
The Selective Laser Melting (SLM) process is commonly used in the metallic materials additive manufacture, and this is a fast process which the pieces are formed layer by layer. In this process a laser source sweeps the bed of dust and selects the regions to be fused, through the high-power intensity applied, according to the proposed digital design, to obtain pieces with good density. Although FSL has several advantages compared to conventional manufacturing processes, it is still costly for industry. The optimization of processing parameters of this technology for shape memory alloys has been explored. NiTi shape memory alloys stand out for their shape memory effect and superelasticity, which gives them a several applications. Optimizing the FSL process for these alloys, power and energy density of the laser parameters, is fundamental to obtain the parts with good mechanical properties and low porosity. Thus, this work aims to observe and criticize the influence of the processing parameters on the microstructure and porosity of NiTi alloy specimens manufactured by FSL
Plenary
10/1/19, 11:05 AM - 10/1/19, 11:30 AM
Presenter(s): rosiane beatriz costa madeira (arcelorMittal tubarão), Bruno Vinicius Nunes Garcia (arcelorMittal tubarão), Robson gonçalves ramos (arcelorMittal tubarão)
Abstract:
SSAssets Control, is a SW to control the delivery and return of assets such as Personal Protective Equipment – PPE, and tools. The asset control system independently manages various tool stocks / EPIs. The system radio frequency identification (RFID) technology to perform these controls (delivery and return). In addition to the identification of RFID equipment, users in various system functionalities, such as Pickup and Return of items, are also identified by MIFARE
Forum
10/1/19, 11:05 AM - 10/1/19, 11:55 AM
Presenter(s): Leonardo da Silva Schmidt – managing partner and head of sales, shipping & tracking, and customs clearance at Interfreight Logistics
Abstract:
Forum
10/1/19, 11:05 AM - 10/1/19, 11:55 AM
Presenter(s): André Luis Moreira de Carvalho – Associate Professor – UEPG;
Abstract:
Plenary
10/1/19, 11:30 AM - 10/1/19, 11:55 AM
Presenter(s): EDO ENGEL (DANIELI CORUS), Victor van Straaten (DANIELI CORUS), BART De Graaff (danieli corus)
Abstract:
The hot blast system is key ancillary plant equipment with respect to safe and stable operations during a long blast furnace campaign. Hot blast stove designs have been optimized to such an extent that in some cases, their lifetimes have surpassed the campaign lengths of the associated blast furnaces by a substantial margin, with the exception of the burner and a few critical areas. This article presents recent developments with respect to designing, building new and operating existing hot blast systems for a long lifetime and at optimized performance. These developments include fundamental improvements such as dome combustion designs as well as increasingly comprehensive packages for inspection, assessment and maintenance techniques. Examples of such techniques are burner replacement with the hot blast system at operating temperature, improved double shell approaches and TOFD measurement applications.
Plenary
10/1/19, 11:30 AM - 10/1/19, 11:55 AM
Presenter(s): joão paulo martins drumond (FERROVIA CENTRO-ATLANTICA -FCA), gustavo barros castro (rumo), Henrique Barros Lopes (universidade federal de ouro preto), fernando adriano pinto (fca / vli), jesus jonatan souza santos (rumo), breno Carvalho de Oliveira (fca / vli)
Abstract:
The freight cars maintenance strategy of VLI was based on corrective, preventive and sometimes predictive maintenance, since for some components systems doesn´t have information to evaluate the wear condition of items, and then, determinate the right time to realize mechanical intervention. In this work was developed a study about the component system responsible for the biggest part of the railway occurrences involving freight cars and designed an instrument that make it possible to track the wagon condition, allowing the use of the predictive maintenance. To develop the instrument, was used the decision-making method named AHP that enabled the comparison of many information related to the wagons that was analyzed just individually before, and then rank the wagons in worst conditions to direct them to the maintenance
Plenary
10/1/19, 11:30 AM - 10/1/19, 11:55 AM
Presenter(s): fabrício domith rodrigues (usiminas), leonardo josé silva de oliveira (usiminas), marcelo moreira furst gonçalves (usiminas), luiz fernando andrade de castro (ufmg)
Abstract:
Eventually, it is necessary to adjust the width of the slabs by flame cutting process. However, the conventional flame cutting process is not recommended for some grade of steel by generating susceptibility of cracks in the cutting section. Thus, in the present work a new technique for dimensional slabs adjustment based on the use of double flame cut was developed and applied at Usiminas. After optimization of cutting parameters (velocity and position of the torches), temperatures of 200°C were obtained, homogeneously distributed along the cutting section, favoring dimensional adjustment. With the industrial implementation, there were indices above 85% of slabs approval and, consequently, the use of plates that were not previously intended for the generation of rolling mill products.
Plenary
10/1/19, 11:30 AM - 10/1/19, 11:55 AM
Presenter(s): FELIPE BELUCHE LIMA (SANDVIK )
Abstract:
Brazil is the largest producer of crude steel in the Americas by BOF process and many challenges come along with the increasing market demand. In the BOF, a tubular wall hood structure has been showing premature failures related to the overlay welded tube technology placed in the hood wall. The main root causes were: thermal fatigue at 1800°C, hot spot formation, high heat-affected zone (HAZ) leading to susceptibility of stress cracking, carburizing corrosion and superficial wearing. Based on that, co-extruded tube technology (named composite tube by Sandvik) was the alternative chosen to enhance hood performance without compromising BOF process. In order to rises safety and productivity, composite tube has 100% metallurgical bond assuring stable expansion, high heat exchange efficiency, better corrosion resistance and less rough surface finishing. It was highly suggested to many others mills due to similar and already existing reported cases.
Plenary
10/1/19, 11:30 AM - 10/1/19, 11:55 AM
Presenter(s): bruno santos malaquias (usiminas), henriquison magela bottrel reis (usiminas), gerson evaristo de paula junior (usiminas)
Abstract:
The challenge in coke production is related to the preparation of coal blends that will produce the coke with the required quality for the use in blast furnaces. The influence of inert materials such as (petcoke [CVP], anthracyte and high inert carbon [CATI]) in the coal blends on texture and quality of coke was evaluated in a pilot scale. The results indicated that, for the blend evaluated, the addition of CVP up to 30% produced quality coke (DI15-150) suitable for the use in Usiminas blast furnaces. The main texture types presented were mosaic, fragmentary, fusite, anisotropic inert and remaining CVP. On the other hand, the addition of anthracyte caused a significant decrease of DI15-150 and CSR. Optical microscopy analyses revealed free particles in the coke matrix, contributing to the drop in quality. Additions of CATI to the coking blends resulted in a significant drop in coke quality, and predominance of mosaic type texture. In general, CVP was the only inert material tested that produced proper quality coke for blast furnace application. The high inert coal presented the worst result.
Plenary
10/1/19, 11:30 AM - 10/1/19, 11:55 AM
Presenter(s): DANIEL MAPA CLEMENTE (UFOP), carlos antônio da silva (Ufop), Itavahn Alves da Silva (ufop), Johne Jesus Mol Peixoto (ufop), Weslei Viana Gabriel (ufop)
Abstract:
Certain risks related to Sn and Ta supply chain may lead companies to terminate business relationships with suppliers. An alternative to this supply limitation is to enhance the processing of secondary materials as source of raw material. An example consists of sourcing of Ta2O5 from tin slags. Thus, the present work sought to enhance the processing of cassiterite containing relevant content of Ta2O5. The objective was to maximize the concentration and yield of this oxide in the slag, while maintaining high yield of Sn in the metallic phase. Aiming that, reduction of the cassiterite was studied in an electric arc furnace and additions of Na2CO3 were used to decrease the melting temperature of the slag. The furnace operation was found to be stable and processing steps allowed to reach high yield of Sn and Ta, as well as high Ta2O5 content in the slag. Based on processing data and on the low Na2O content, it was concluded that the addition of Na2CO3 was beneficial to the process, acting on the maximization of the Ta2O5 content and on the stability of the operation.
Plenary
10/1/19, 11:30 AM - 10/1/19, 11:55 AM
Presenter(s): DAVI SILVA BRAGA (VALLOUREC SOLUCOES TUBULARES DO BRASIL S.A)
Abstract:
Vallourec pioneered the deployment, development and consolidation of technology for the use of pulverized charcoal as the main energy source on the first Grate-kiln pelletizing plant in Brazil. The objective of this work was to delve into the subject and to bring more information about this innovative practice of Vallourec that has been attracting the interest of other companies in the steel industry. Industrial tests confirmed the technical feasibility, taking Vallourec ahead in the project of adaptation and investment. With consolidated data of two years from the beginning of the implementation, the main benefits are the average reduction of CO₂e emissions by 50%, reduction of costs by at least 10% higher than expected and return on investment in 18 months.
Plenary
10/1/19, 11:30 AM - 10/1/19, 11:55 AM
Presenter(s): JORGE LUIZ VALENCA MARIZ (UFRGS ), Marília da silva cavalcante (ORICA Brasil), suelen silva rocha (ufpe), filipe brito marinho de barros (ufpe), júlio césar de souza (ufpe), artur ângelo alcântara de assis (ufpe)
Abstract:
A seleção adequada da taxa de produção de um empreendimento mineiro tem influência direta na possibilidade de sucesso do projeto, assim como a definição do porte e quantidade de equipamentos empregados em sua operação influenciam a maximização do Valor Presente Líquido (VPL). Nesse processo, a análise de risco na variável de saída aliada à análise de sensibilidade fornece resultados mais consistentes, visto que considera os riscos e incertezas de um projeto ao longo de sua vida útil. Este estudo teve como objetivo analisar a operação em uma mina de agregados a partir da consideração de quatro diferentes conjuntos escavadeira-caminhões através do método do Valor Anual Uniforme Equivalente (VAUE), comparando-o com o método do VPL. Foram revistas as avaliações econômicas efetuadas em estudo anterior, no qual foi obtido o VPL e efetuadas as Análises de Risco e Sensibilidade em cada um dos cenários, e foi acrescida à análise a metodologia do VAUE, sendo esta também submetida à análise probabilística. Foi verificado o desempenho de cada escavadeira e seus correspondentes caminhões para diferentes taxas de produção em ambas as metodologias, permitindo concluir que, para um mesmo número de unidades de transporte e contanto que a taxa de produção requerida seja possível, quanto menor o porte do equipamento, mais econômico é o cenário. Por outro lado, quanto maior a taxa de produção do empreendimento, mais rentável este será.
Plenary
10/1/19, 11:30 AM - 10/1/19, 11:55 AM
Presenter(s): MARCELO QUINTAO E SILVA MARCHETTI (FERROUS)
Abstract:
Comparative study between standard and BigFLUX matrices for high intensity magnetic separation pre-concentration stage for iron ore. The evaluation was carried out on GAUSTEC’s pilot equipment for samples from Viga Mine’s operation. Samples in different feed iron content on rougher stage were evaluated in 46 experiments with matrix variation. The analisys compared chemistry, mass recovery and metallurgical recovery results to define the most efficient matrix to use in a pre-concentration stage.
Plenary
10/1/19, 11:30 AM - 10/1/19, 11:55 AM
Presenter(s): Carolina Berton sanches (UNESP - Universidade Estadual paulista" Júlio de mesquita filho" - Campus de Ilha Solteira), vinícius de araújo salmazo (UNESP - Universidade Estadual paulista" Júlio de mesquita filho" - Campus de Ilha Solteira), miguel Ângelo menezes (UNESP - Universidade Estadual paulista" Júlio de mesquita filho" - Campus de Ilha Solteira)
Abstract:
The current assignment presents the methodology used in the design of a brake disc for a Formula SAE vehicle, analyzing possible materials to be used, geometries favorable to its durability and efficiency, structural simulations at the whole idealized set. In addition, the conditions and characteristics of the manufacturing process of the developed component are described, focusing on the production of a few units of the component, presenting adequate final finishing, passing through final stages of validation and dynamic tests being submitted to real operating conditions.
Plenary
10/1/19, 11:30 AM - 10/1/19, 11:55 AM
Presenter(s): João Victor Lucas Amim (ufmg), Jéssica Dornelas Silva (ufmg), lorena isabela de oliveira ribeiro (ufmg), pedro damas resende (ufmg), suzanny cristina soares martins (ufmg), Vicente Tadeu Lopes Buono (ufmg), leandro de arruda santos (ufmg)
Abstract:
NiTi shape memory alloys are frequently subjected to cyclic stress and straining conditions, being prone to failure by fatigue. However, the fatigue of behavior of these alloys is not yet fully comprehended. In this paper, the mechanical properties of superelastic and heat-treated wires were analyzed by means of uniaxial mechanical cycling after being subjected to different fatigue life fractions on flexural fatigue. The heat-treatment was performed at 400°C for 30 min and cooled in room-temperature water. The microstructure was characterized via XRD analysis and the transformation temperatures were determined by DSC analysis. The results showed that the austenitic wires presented superelastic behavior through all of their fatigue life. However, damage accumulation could be noted as an increase in the maximum achieved stresses after different fractions of the fatigue life. The heat-treated wires, on the other hand, presented elastic deformation of the induced martensite, a behavior similar to the observed in the high-cycle fatigue of conventional materials. In these wires, the maximum stresses achieved during cycling stabilized, meaning that the damage accumulation is not as high as in the superelastic condition.
Plenary
10/1/19, 11:30 AM - 10/1/19, 11:55 AM
Presenter(s): DANIEL MARTINS DA COSTA FURTADO (PSI METALS BRAZIL)
Abstract:
Many companies aim at improving their productivity and standardizing their business processes in order to be able to react quickly to market expectations. With the implementation of PSImetals Production and Quality, Vallourec Soluções Tubulares do Brasil is targeting a metals industry standard solution which allows single piece traceability across supply chain and business integration between its sites, in respect to the quality of the products.
Plenary
10/1/19, 11:55 AM - 10/1/19, 11:55 AM
Presenter(s): Isau de souza Alves Junior (Universidade Federal de Sergipe), Felipe de Freitas Thompson (Mosaic fertilizantes), renan Celestino Silva Santos (UNIVERSIDADE FEDERAL DE SERGIPE), príscylla ferreira dos santos (UNIVERSIDADE FEDERAL DE SERGIPE), matheus mariano da silva reis (UNIVERSIDADE FEDERAL DE SERGIPE), sandro griza (UNIVERSIDADE FEDERAL DE SERGIPE)
Abstract:
Failure analysis can prove to be an important tool for improving the design and operation of equipment. This study intend to determine the causes that led to the rupture of the roller shirt oil compactor. The failure occurred during the operation from the formation of a crack along the longitudinal plane to the plane of symmetry of the roller. The study followed the usual methodology used in fault analysis. The tests were visual analysis, analysis of fracture morphology through optical microscopy, metallography, microhardness and chemical analysis. Through the methodology used, the most relevant factors that caused the failure of the component were established. The cracking of the jacket occurred by overload, without evident plastic deformation, starting from region near the corner between the face of the outer side and the outer diameter of the roller liner. It was also verified that the jacket has found defects - microreflections, porosities, segregations - that encouraged the formation of the crack
Plenary
10/1/19, 11:55 AM - 10/1/19, 12:20 PM
Presenter(s): welder gomes goncalves (ternium brasil Ltda), eustaquio vieira junior (ternium Brasil Ltda)
Abstract:
The blast furnaces can be present happenings of breakings and hot spots in blow pipes, and these situations have the consequences: high risks in the blow pipes assembly integrity, resulting in low safety operational conditions; abrupt increase in the blowpipes internal temperature, causing hot spots and breakings recurring per wear in refractory coatings; necessity of emergency stoppages; necessity to change the blowpipes assemblies per wear in refractory profile. One possibility of cause is rellationed with these happenings can be the combustion in the interior of blow pipes of PCI that injected by lances, causing wear in the coating refractory and consequently hot spots and/or breakings in blowpipes assembly. To avoid the wear in refractory coating was installed the phenomena monitoring systems in raceway. This system works as a complement of differential pressure gadgets between the blowpipes and hot blast pipe. In this paper, it is showed the monitoring design characteristics, its particularities and the results reached after the systems installation in relation with damages in blowpipes assemblies..
Plenary
10/1/19, 11:55 AM - 10/1/19, 12:20 PM
Presenter(s): RICARDO RODRIGUES GRIZOTTI (ARCELORMITTAL)
Abstract:
The purpose of this work is to demonstrate the process of developing and implementing automation in operations, warehousing activities (receiving, storing, moving, inventory, picking and delivery of materials) using SAP FIORI technology with interface in Android and IOS for the use of Mobile (smartphones and tablets), already aligned to the moment of the industry 4.0, aiming at technological innovations in the fields of automation, control and information technology. The development in this new platform aims to make warehouse operations more agile and efficient, seeking to optimize the processing of information faster, reduce the time of permanence of the goods in the transfer areas and generate greater traceability of the processing with direct interface and online with the organization's ERP-SAP. The methodology of the work was to identify opportunities to exploit the best potential of SAP Fiori solutions, aligned with the Android and IOS operating systems for the use of mobile phones, tablets, with internal and / or 3G / 4G network communications, always aiming to optimize all operational activities (materials flow) and administrative (information flow) within the processes of the warehouses and their interface areas. The project started and was implemented in the Plans units (ArcelorMittal Tubarão and Vega), and with an expansion plan for ArcelorMital Brasil Longos units during the year 2019. In this first stage the result achieved was fully benefits have been found in reducing errors; increased security; cost reduction; optimization of processes; transparency in data; product customization, which is expected that the learning curve will naturally lead us to the adoption of new incremental solutions resulting in the best levels of management of the process of storage and movement of materials.
Plenary
10/1/19, 11:55 AM - 10/1/19, 12:20 PM
Presenter(s): fabiano candido santana (ArcelorMittal tubarão)
Abstract:
In the current economic scenario, companies seek to become more and more competitive, optimizing costs through assertive and timely decision-making and not just performing linear cuts across the organization. The biggest challenge for business leaders, especially maintenance staff, is to achieve corporate goals while adding value to the asset life cycle. For this, it is not enough to only master the techniques used in the maintenance strategies, but to decide between the risks and opportunities, which really are important to maintain the required performance. To support this daily dilemma, a homemade tool was developed to consolidate the global vision of risk events, taking into account a pattern to be followed so that everyone can see the events of risks and opportunities from the same perspective, thus supporting the decision-making process at the managerial levels and board.
Plenary
10/1/19, 11:55 AM - 10/1/19, 12:20 PM
Presenter(s): Rafael Oliveira sena (SMS Group)
Abstract:
Nothing short of revolutionary, Belt Casting Technology (BCT®) is a further leap toward near-net-shape casting. Depending on the BCT® caster type, different production rates and a large variety of product sizes are possible. What makes BCT® casters so special is that they handle alloys previously not suitable for continuous casting. Furthermore, the new technology also copes with crack-critical conventional steel grades impossible to produce by standard continuous casting. Protected from reoxidation, the liquid steel is poured from a conventional ladle into a covered tundish. The steel flows onto the moving horizontal mold consisting of the conveyor belt and internally cooled side dams. There is an inert gas atmosphere above the conveyor belt to protect the solidifying steel. Finally, at the rear end of the caster, a defined gas mix directly influences the solidification structure to form a thin strip. Typical product dimensions are 10-20 millimeters thick and 1,000 - 1,600 millimeters wide, with casting speeds of up to 30 meters per minute. The as-cast strip leaves the conveyor belt horizontally. Behind an enclosed roller table which ensures complete process inertization right up to the end of the table, is a combination of two pinch-roll stands separated by a looper. A second pinch roll unit feeds the strip to a moving hydraulic shear. The full benefits of belt casting technology regarding OPEX and CAPEX can be achieved by inline concepts.
Plenary
10/1/19, 11:55 AM - 10/1/19, 12:20 PM
Presenter(s): Raissa S. Salgado (ternium brasil), mariana alves ribeiro (ufmg ), breno totti maia (lumar metals), roberto parreiras tavares (ufmg ), Daniel Augusto Godinho de Carvalho (ternium brasil), Débora C.O. Silveira (ufmg)
Abstract:
Mixing time is an important parameter when considering chemical and thermal homogenization in steelmaking reactors. It can also be relevant in the kinetics of chemical reactions. Different methods have been used to estimate mixing times in physical models of steelmaking reactors. In the present work a new method to estimate mixing times in physical models has been proposed. This method can be used when transparent fluids are used to simulate the liquid steel and the slag. Results of mixing times in a physical model of a BOF obtained with different techniques were compared. It was shown that the new method is more reliable and consistent than the common methods based on electrical conductivity measurements and colorimetric analysis
Plenary
10/1/19, 11:55 AM - 10/1/19, 12:20 PM
Presenter(s): thigao oliveira pontes (companhia siderúrgica do pécem), Diego Salmin Costa (COMPANHIA SIDERÚRGICA DO PÉCEM), Luiz Cláudio Costa (COMPANHIA SIDERÚRGICA DO PÉCEM), Diogo Dias do Nascimento (COMPANHIA SIDERÚRGICA DO PÉCEM), Fernando da Cunha Leite (COMPANHIA SIDERÚRGICA DO PÉCEM)
Abstract:
For a stable and efficient operation of a coke oven, it is necessary to control the coke's fuel, so it is necessary to define the thermal balance for effective coking process control. The objective of the work was to define the thermal balance in coke battery in order to guarantee the temperature control by defining the heats of entry and exit of the same
Plenary
10/1/19, 11:55 AM - 10/1/19, 12:20 PM
Presenter(s): PEDRO ENRIQUE MONFORTE BRANDAO MARQUES (universidade federal do rio de janeiro), Mateus carneiro porto (UNIVERSIDADE FEDERAL DO RIO DE JANEIRO), Hendrick Villela Carrijo (UNIVERSIDADE FEDERAL DO RIO DE JANEIRO), Adriana da Cunha rocha (UNIVERSIDADE FEDERAL DO RIO DE JANEIRO)
Abstract:
Among the titanium alloys, the addition of Nb in bands of determined compositions can favor the reduction of the elastic modulus of the material, an interesting factor for its application in prosthetics. Among these compositions, the alloys with 17,5-25%Nb present structure predominantly dominated by the phase α'''. The objective of this work was to characterize the Ti-20Nb alloy in its as cast state to analyze the phase distribution generated by the addition of Nb in this composition in the microstructure of the cast alloy. To accomplish so optical microscopy (OM), electronic microscopy (SEM), x-ray diffraction (XRD) and micro hardness analyses were conducted. OM images showed coarse grain size and equiaxial dendritic structure. SEM images depict very typical martensitic morphology, in agreement to XRD analysis that indicated the complete presence of αLPHA’’ phase. Therefore, results show that α phase predicted in equilibrium diagram was completely suppressed by martensitic transformation βETA→αLPHA’’.
Plenary
10/1/19, 11:55 AM - 10/1/19, 12:20 PM
Presenter(s): RoDRIGO BOYER FERNANDES (VALE), Rossano Augusto Pilon nunes (vale), Raquel Teixeira Pereira (vale), Josiane Lira Batista Haagensen (vale), Denisio Miranda Custódio (vale), Felipe Viana Pimenta (vale), Marcela Lessa de Freitas (vale), Ana Carolina de Oliveira de Dieguez (arcelor mittal tubarão), Fábio Dummer Silva (arcelor mittal tubarão)
Abstract:
In the Tubarão Pelletizing Plants, anthracite is used as solid fuel, which has fixed carbon content of 72%. This paper will present the pilot scale results and industrial scale tests of an alternative fuel to anthracite, named Blast Furnace Dust. All the work was developed using samples from Arcelor Mittal Tubarão, due to it has a large source of production and is near to Vale/SA, which reduces significantly the cost for the material’s transportation. There was an impact on the variability in fixed carbon results of the slurry, mainly at the beginning of the test, reaching very high levels and put on risk the pellets physical’s quality. This variation can be explained by some operational disturbances and, mainly, by the low predictability of Blast Furnace Dust quality and lack of an adequate system for material preparation and dosage.
Plenary
10/1/19, 11:55 AM - 10/1/19, 12:20 PM
Presenter(s): Delciane Porfiro (Vale SA), Tiago de Mattos Serodre (Centro de Desenvolvimento da Tecnologia Nuclear), Valdirene gonzaga de resende (Vale SA), Antônio Eduardo Clark Peres (Universidade Federal de Minas gerais)
Abstract:
The evaluation of the effect of the addition of carbon nanotubes (NTCs) directly to a etheramine on the flotation recovery of the quartz at pH 10.5 was carried out by means of microflotation tests in Hallimond tube. The quartz flotation was evaluated using 0.1% (w/v) etheramine solution with different percentages of carboxylic functionalized NTCs. The increase in the percentage of functionalized NTCs increased the flotation recovery to a maximum and from this it was observed a reduction of the recovery of the mineral. Pure etheramine and etheramine with the NTCs were characterized by FTIR spectroscopy and thermal analysis. FTIR spectra of both pure etheramine and etheramine with NTCs clearly showed peaks with the same wavelengths and diagnostics of the cation etheramine and acetate anion. Thermogravimetry indicated that the etheramine + NTCs-COOH mixture lost approximately the same weight percentage over a larger temperature range. In addition, the interaction of the nanotubes with the etheramine caused them to decompose at a lower temperature.
Plenary
10/1/19, 11:55 AM - 10/1/19, 12:20 PM
Presenter(s): NEYMAYER PEREIRA LIMA (vale s.a.)
Abstract:
This paper aims to evaluate the ore sorting technology with x-ray sensor for identification and removal of particles with predominance of gangue minerals present in fractions coarser than 16mm of iron ores, aiming to increase iron content. the results obtained in pilot tests showed the increase of 3 points in the content of fe after the removal of 25% of particles with predominance of gangue minerals, being an option of greater economic feasibility in relation to re-crushing.
Plenary
10/1/19, 11:55 AM - 10/1/19, 12:20 PM
Presenter(s): Adriano Gomes de Freitas (Zeppelin Systems Latin America/Universidade federal do ABC - UFABC), Ricardo Borges dos Santos (ZEPPELIN SYSTEMS LATIN AMERICA/UNIVERSIDADE FEDERAL DO ABC - UFABC), Vitor Furlan Oliveira (ZEPPELIN SYSTEMS LATIN AMERICA/UNIVERSIDADE FEDERAL DO ABC - UFABC), Yuri Oliveira Lima (ZEPPELIN SYSTEMS LATIN AMERICA/UNIVERSIDADE FEDERAL DO ABC - UFABC), Luis Alberto Martinez Riascos (ZEPPELIN SYSTEMS LATIN AMERICA/UNIVERSIDADE FEDERAL DO ABC - UFABC)
Abstract:
The search for better energy efficiency solutions through technology is constant in our world. Here we present a series of results obtained during the development of an equipment for industrial use, a bulk solids feeder called Batchpump. With the proposal of being an alternative to the conventional pressure vessel, having as main differentials in energy efficiency; installation; dimension; and cost, this work confronts results obtained for Batchpump and a conventional vessel applied in a pneumatic limestone transport system in powder in an industrial scale line with 130m extension. At an inlet pressure of 4 bar, the Batchpump equipment obtained a transport rate of 75% and air consumption in the order of 30% lower than the traditional vessel, validating the hypothesis under which it was designed: to have a higher efficiency with similar transport rates. We present in the results the data in stationary transport cycle in dense phase regime.
Plenary
10/1/19, 11:55 AM - 10/1/19, 12:20 PM
Presenter(s): ANA CECILIA DE CARVALHO (Universidade federal de Ouro Preto), Amanda Aparecida Fátima Arruda (Universidade Federal de Ouro Preto), Rhelman Rossano Urzêdo Queiróz (CEFET-MG - Ouro Preto), Geraldo Lúcio de Faria (Universidade federal de ouro preto), Paulo Sérgio Moreira (Universidade federal de ouro preto)
Abstract:
The 410D ferritic stainless steel is a relatively new steel and in development on Brazilian Market. It has been put as a candidate to replace common low carbon steels and weathering steel in some applications, where there are some requirements related to the materials oxidation and corrosion resistance. However, there still is a lack of knowledge related to its mechanical behavior, which allow the assessment of its application’s feasibility in aggressive work conditions, such as in relatively high temperatures. Furnace structural parts, piping for conducting hot gases and vapors, among others, are potential examples for 410D steel applications. In this context, the present work has assessed the behavior of the aforementioned steel when it is submitted to hot tensile tests at 300°C and 600°C, by comparing the obtained results to its performance at room temperature. It was concluded that the 410D stainless steel is susceptible to the dynamic aging phenomenon when strained at 300°C. In this condition, its total strain is significantly affected and decreased. At 600°C it was noticed a decrease of 45% on its yield strength and an increase on its total strain when compared to the room temperature condition.
Plenary
10/1/19, 11:55 AM - 10/1/19, 12:20 PM
Presenter(s): ORLINDO TONINI FILHO (ARCELORMITTAL TUBARÃO)
Abstract:
The purpose of the syscoor is to perform the sequencing of the operations from the weighing of the torpedo car until the final transformation of the steel into slabs, with emphasis on the production of the continuous casting in the according to the operational strategy. With this system, every operator involved in the steel production process can know, precisely and beforehand, the exact moment to start each activity of the steel shop production flow. This system communicates with all other steel shop sub-systems, on an automated basis. as a result, it can receive and send information, and at the same time keep its database continuously updated. With the recent technological modernization of this system, it has also become a system that can provide and reliable information to support the performance of managers and supervisors linked to the production process, anticipating decisions, which consider the parties and the whole, the current and future
Plenary
10/1/19, 12:20 PM - 10/1/19, 12:45 PM
Presenter(s): simon chiartano (TRB)
Abstract:
A global reflection on the design of blast furnace main runner was investigated in this paper. TRB Company used its skills and expertise to understand what the best option for this sensitive component is, including some innovative tools: intelligent block design for safety lining, thermal & thermomechanical numerical simulation, immersive measurement by thermocouples, IR thermal camera, 3D laser scanner.
Plenary
10/1/19, 12:20 PM - 10/1/19, 12:45 PM
Presenter(s): leandro moraes da silva graciotti (arcelormittal tubarão), lorenzo bortolon scandian (arcelormittal tubarão)
Abstract:
This article aims to present the evolutionary framework regarding Safety of Work inside the Steel Products Terminal (TPS) of the port of Praia Mole and show the new tools and technologies applied to the port process to guarantee the sustainability and constancy of port operations. In this document, we will present the Steel Products Terminal, its operating structure, and the executed operations. Next, we'll explain the security management tools used, as well as their technologies. Finally, we will show the impacts from the resources and safety actions carried out, emphasizing the importance of technology in conjunction with work safety in the TPS.
Plenary
10/1/19, 12:20 PM - 10/1/19, 12:45 PM
Presenter(s): Stenison dias mello (Usiminas)
Abstract:
The choice of correct maintenance strategies for the different assets of a company is a great challenge for the managers. The definition of a single maintenance policy for the entire company, although it brings benefits like simplification of management process and standardization, can results in inefficiency and incompatible costs whith the budget. In most cases, one company or even one plant of a company may have different levels of occupation of its production lines and, in order to achieve competitive cost results, it is necessary to adopt different strategies for each of these lines. This study presents an analysis of the occupation levels of several productive lines of a steel plant and proposes to establish different maintenance strategies for each of them, based on their occupation levels. As a result, it can be notice that in a same company it’s possible to have different occupation levels, which requires the adoption of different strategies.
Plenary
10/1/19, 12:20 PM - 10/1/19, 12:45 PM
Presenter(s): edgar adrian de oliveira (arcelormittal tubarão)
Abstract:
Filters at spray circuit in water treatment plant at continuous casting process present flow performance problems, leading to loss of productivity in slab production process at ArcelorMittal Tubarão. In the filtration stage of the recirculation water used in the spray circuit, reduction of the flow with the operating time does not meet the need of the process. There is an inaccuracy design specification since the original design aims at drinking water treatment and not water from the direct casting system, this water have high concentration of suspended solids and oil&greases. In order to recover the flow of the filtered water, it is necessary to increase the counter-wash frequency, improving the water flow and cleaning the beds, but the high frequency of counter-washing becomes a complication for WTS operation, jeopardize the operation stability. The objective of this work was to identify and propose solutions to the flow problems of the filters in order to guarantee the nominal design specification (1380 m³ / h / 5 filters) and consequent operational system stability. Laboratory evaluations were carried out to identify the ideal composition of the filter bed as well as its particle size distribution and internal modifications of the filter and crackers used in the counter-wash system. After the modifications, the filter is operating for almost a year according to specification, guaranteeing filtration flow and extending counter wash time from 6/6 hours to 15/15 hours.
Plenary
10/1/19, 12:20 PM - 10/1/19, 12:45 PM
Presenter(s): Guenther Staudinger (DANIELI CORUS), Michael Skorianz (danieli corus), Uazir Bezerra de Oliveira (danieli corus), Edo Engel (Danieli Corus)
Abstract:
In 2011 Danieli Linz has been founded and entered as newcomer the Converter Steelmaking market. Since this time 5 BOF References (from 80t up to 350t capacity) are in operation, a 300t BOF is currently in manufacturing status and another 180t BOF is in engineering phases. In July 2018 Danieli Linz Technology was fully integrated into the well-known Danieli Corus group, located in Ijmuiden (Netherlands). This new set-up creates excellent opportunities to use synergies and combine know how from both disciplines, iron- and steelmaking to further develop technologies and products in these fields. On the BOF market, there is more and more the demand to provide complete system responsibility. Which means optimizing converter- and refractory-technologies with the aim to increase their life-times in parallel as a system. This is a new challenge for all parties involved (operation of steel plant, supplier for converter and refractory). Under this scenario Danieli Corus can offer important features and improvements to the market: > Maximum increase of converter size respectively inner reaction volume while leaving the main dimensions of the existing plant unchanged. > The suspension system has to be designed in a manner that it is not limiting the life time of the converter. In this regards the well-known vertical lamella elements have been further improved. For the horizontal loads, Danieli developed and patented a new suspension element, which is based on flat lamella plates which compensate the thermal expansion of the vessel by elastic deformation. > To increase the life time of the vessel shell, Danieli Corus applies in a recent project the features of high creep resistance converter shell material, converter air- and water cooling. > For monitoring the temperature, Danieli Corus further developed the second generation of the temperature monitoring system Q-TEMP 2.0. This is a direct outcome of the above mentioned synergies. > Another feature is the Danieli Conditioning Monitoring System (DCMS), which actually will be installed in a converter tilting drive. This system is giving online feedback of the actual condition of the gear components and defines the optimum timing for overhauling, repair or exchange of components or parts.
Plenary
10/1/19, 12:20 PM - 10/1/19, 12:45 PM
Presenter(s): Renata Lima casemiro (Ternium brasil), Neyda de la caridad om tapanes (centro universitário estadual da zona oeste uezo), Ana Isabel de Carvalho Santana (centro universitário estadual da zona oeste uezo), Roberta Gaidzinski (centro universitário estadual da zona oeste uezo)
Abstract:
Currently, both in Brazil and in the world, factory efficiency in the steel industry seeks energy efficiency, and one of the relevant issues is the proper application of the energy balance. At Heat Recovery Coke plant, energy recovery is one of the main objectives, with beehive-type furnaces, oxygen is introduced into the furnace during the coking process and the complete combustion of the coal gas takes place, whereby hydrocarbon emissions are almost completely eliminated. In this context, the present work had the objective of realizing an energy balance in a furnace of a COQUERIA HEAT RECOVERY, applying the methodology used by Usiminas (1997) and used by EPE (Energy Research Company) in 2005. The results showed that the energy losses in the process are related to the percentage of oxygen in the combustion gases. With the studied model it is possible to analyze the losses due to the fuel humidity, hydrogen combustion, air humidity, percentage of hydrogen in the fuel and the unburnt carbon in the ashes.
Plenary
10/1/19, 12:20 PM - 10/1/19, 12:45 PM
Presenter(s): EDUARDO GIMENES JABES (UNIVERSIDADE DE SÃO PAULO), MARCELO DE AQUINO MARTORANO (UNIVERSIDADE DE SÃO PAULO), João ricardo filipini da silveira (INSTITUTO DE PESQUISAS TECNOLOGICAS), joão batista ferreira neto (INSTITUTO DE PESQUISAS TECNOLOGICAS), THIAGO PIRES NAGASIMA (UNIVERSIDADE DE SÃO PAULO)
Abstract:
A mathematical model to simulate the solidification of Nd-Fe-B alloys by the strip casting process was implemented. The model was based on the undimensional heat conduction equation applied to the thickness of the strip and to the wall of the water-cooled roll of the casting machine. The numerical solution of the equations yielded the profile of solid fraction along the strip thickness and the temperature along the strip and roll wall. The temperature of a point on the roll external surface oscillates owing to cycles of contact with the liquid alloy stream and detachment of a piece of strip. The average temperature of the roll wall increases with time, decreasing the strip cooling-rate. Even at the beginning of the process, pieces of strip are not completely solid as they detach from the roll.
Plenary
10/1/19, 12:20 PM - 10/1/19, 12:45 PM
Presenter(s): ARTUR FREDERICO FONSECA DA CRUZ (Vale S/A), jael moutinho dos santos (Vale S/A)
Abstract:
The problem of iron ore sticking and premature wear on screening rolls on balling systems is recurrent. The importance of the "screening" function of the roller classifier is fundamental, since in perfect conservation state and operation it is possible to ensure the performance improvement of the most expensive phase in the pelletizing production chain, the thermal processing. The present works target is the identification of possible causes of iron ore adhesion in classifier rollers and develop a methodology to evaluate and quantify the iron ore sticking mechanism on the classifier surface. For this purpose, iron ore and additives were collected at four different pelletizing plants in terms of iron ore origins and process flows, three different rollers were chosen for testing around the adhesive energy at the iron ore mixture/rolls surface interface. As results, it was possible to construct methodologies to evaluate the aggregability, it was observed the importance of "specific moisture" definition and knowledge on the adhesive energy increase, besides presenting the better performance of rolls with tungsten carbide coating than other evaluated.
Plenary
10/1/19, 12:20 PM - 10/1/19, 12:45 PM
Presenter(s): Rafaella bicalho da rocha (gaustec)
Abstract:
For more than five years, GAUSTEC, along with large Mineral Industry companies, has sought solutions to concentrate flotation tailings and fines by using High Intensity Magnetic Separators (WHIMS). In 2014, GAUSTEC launches the world's largest magnetic separator, the GHX 1400, with capacity up to 1400t/h. By 2015, it launches NoBLOCK® technology, a protection for magnetic separators against clogging. Finally in 2017, it launches two technologies that, together with the previous two, revolutionize the market for magnetic separation, the BigFLUX® Matrix and SuperWHIMS® technology. This article aims to show all these technologies together and to show the efficiency of the same ones already employed in mining companies.
Plenary
10/1/19, 12:20 PM - 10/1/19, 12:45 PM
Presenter(s): Henrique Gonçalves Teixeira (MOSAIC FERTILIZANTES), Priscila Tavares de Paula (MOSAIC FERTILIZANTES), Márcia Mika Saito (MOSAIC FERTILIZANTES), Felicio de Freitas Simoes (MOSAIC FERTILIZANTES), Lorena da Silva Gomes (MOSAIC FERTILIZANTES), Lílian Lís de Andrade Cantuário Costa (MOSAIC FERTILIZANTES), JOSIANE SÍLVIA MARTINS RODRIGUES (MOSAIC FERTILIZANTES)
Abstract:
In this paper a sample of the apatite flotation from Cajati-SP was studied. Four alternatives of depressants were analyzed: corn starch, cassava starch, sodium hexametaphosphate with corn starch and sodium silicate with corn starch. The cassava starch had a gain of 7.5% in the metallurgical recovery and a collector consumption 13.8% greater than corn starch. Alternatives with hexametaphosphate and silicate sodium had a loss of 6.7% and 7.8% in recovery respectively in comparison with corn starch.
Plenary
10/1/19, 12:20 PM - 10/1/19, 12:45 PM
Presenter(s): Sirlene Trugilho Perin Passigatti (Arcelormittal brasil sa)
Abstract:
The purpose of this study was to compare the results obtained from differs inclusions analysis techniques: optical microscopy, Automated Steel Cleanliness Analysis Tool (ASCAT) and optical emission spectrometry (Spark-DAT) and thus evaluate these systems for the use in inclusions control during steelmaking process. For this study samples provided by ArcelorMittal Tubarão industrial plant have been analyzed using this technique and the amount of inclusions were determined. Therefore, three type of steels with low and medium alloy were studied: Ultra low carbon aluminum killed steel; Ultra low carbon silicon killed steel; medium carbon steel aluminum and silicon killed steel. The samples were prepared by standard metallographic approach and have been taken to the optical microscope to obtain images as well as measurements of the amount of inclusions. Subsequently, the samples have been analyzed by Automated Steel Cleanliness Analysis Tool (ASCAT) and optical emission spectrometry (Spark-DAT). The three type of analysis were compared using same area of the samples, in order to insure a better fit. The results obtained have indicated a convergence between these methodologies
Plenary
10/1/19, 12:20 PM - 10/1/19, 12:45 PM
Presenter(s): DARLAN VALE BAYãO (CEFET-MG), Geraldo Lúcio de Faria (UFOP), Emiliana Cristina Marques Arthuso (APERAM SOUTH AMERICA), José Rogério de Oliveira Júnior (APERAM SOUTH AMERICA), Sidney Nicodemos da Silva (CEFET-MG), IVETE PEIXOTO PINHEIRO (cefet-mg)
Abstract:
The sigma phase is known to negatively affect the mechanical properties and corrosion resistance of duplex stainless steels (DSSs). Thus, exposure of the alloy to elevated temperatures such as during production processes, welding or heat treatments should be performed in a cautious manner in order to avoid precipitation of sigma. Thus, suitable models to predict the precipitation of the sigma phase are very useful tools. Among the numerous models, the Johnson-Mehl-Avrami-Kolmogorov (JMAK) relationship is one of the most commonly used models to describe the kinetics of isothermal phase transformations in many systems governed by nucleation and growth mechanisms. Therefore, the present work aimed to conduct a kinetic study based on the JMAK model of the sigma phase precipitation in a UNS S31803 DSS isothermally aged at 750ºC, 800ºC and 850ºC. It was concluded that the precipitation kinetics of the sigma phase in the alloy followed the JMAK model, since a good correlation was obtained between experimental and simulated data It was observed that increasing the aging temperature from 750°C to 850°C accelerated the sigma phase precipitation kinetics. The determined activation energy (182,4 kJ/mol) for sigma phase precipitation in this system suggests that the diffusion of Cr in ferrite is the main mechanism involved in the formation of this phase.
Plenary
10/1/19, 12:20 PM - 10/1/19, 12:45 PM
Presenter(s): marcos de nardi queiroz (psi metals)
Abstract:
In the steel industry quantities of up to 5% of the pieces produced need to be totally or partially scrapped due to quality defects. Most of the defects found are related to the early stages of the production process, but these defects are most often found in the final products. And many losses could be avoided if defects were discovered in preliminary stages through actions such as: changing the production route of the material, adapting process parameters, or adding corrective steps. However, the amount of data to be analyzed makes it impossible for quality specialists to predict these defects, and for this complex mathematical models have been created, correlating defects with thousands of machine and process data evolving over time. In addition, a practical way of applying this quality prediction model is to define a set of actions for all the pieces considered suspected to contain a defect. For this to be effective we need to further define the probability threshold of the defect from which the actions will be taken, and this threshold must take into account the cost of the corrective action in comparison with the probability and cost of the defect.
Closing ABM WEEK 2019
10/1/19, 2:00 PM - 10/1/19, 3:40 PM
Presenter(s):
Abstract:
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:00 PM
Presenter(s): SALVATORE gIULIANO pEIXOTO tROPIA DE aBREU (Universidade federal de ouro preto), Thiago Araújo Santos de Oliveira (UNIVERSIDADE FEDERAL DE OURO PRETO), João Victor Gomes Guimarães Ananias (UNIVERSIDADE FEDERAL DE OURO PRETO), Guilherme Santiago Queiroz (UNIVERSIDADE FEDERAL DE OURO PRETO), Itavahn Alves da Silva (UNIVERSIDADE FEDERAL DE OURO PRETO), Carlos Antônio da Silva (UNIVERSIDADE FEDERAL DE OURO PRETO), Johne Jesus Mol Peixoto (UNIVERSIDADE FEDERAL DE OURO PRETO)
Abstract:
The refining of metal in a combined blow converter – including desulphurization ad dephosphorization reactions- is quite dependent on the degree of contact between metal and slag. This work deals with physical modelling of mass transfer between metal and slag using water to model metal, oils of different properties to emulate slag and various air flow rates to assess the influence of the stirring power. Thymol is used as the tracer substance. According to the results from this work the values of the apparent mas transfer coefficient lie in two distinct regions as a function of the stirring power. High values of mass transfer are achieved for high values of stirring energy and low values of Capillary number
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): Iasmim Ariane Silva (IFRN), Pedro Henrique Medeiros Câmara (IFRN), Jaiza Bernardo de Oliveira (ifrn), flanelson maciel monteiro (ifrn)
Abstract:
The process of manufacturing pig iron in the blast furnace industrial units has the consequence of the generation of slag, a waste that can be produced in high quantity and present damages to the environment, when not reused. In the composition of this tailing, can be find the presence of metals, harmful to the nature, such as manganese which has an important and widespread utility in the metal industry, but even so the slags are not used as a potential source of this element. Knowing this, the slags were subjected to crushing and grading steps to separate the aliquots. These were applied in the tests of technological characterization of the material, from MEV, EDS,Soxhlet, analysis of liberation degree by digital microscope, finding data of several analyzes. Thus, the objective of this paper is to demonstrate, through the characterization of the slag, that this material has in its composition metallic elements, focusing on manganese, that can be reused in order to avoid the generation of environmental liabilities harmful to the environment. The results show a manganese content with a degree of release greater than 80% in bands from 48 #, which were divided by density and thus allow the gravimetric separation of the material in question.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): RAQUEL HÚNGARO COSTA (Escola Politécnica da Universidade de São Paulo), JONATHAN TENÓRIO VINHAL (Escola Politécnica da Universidade de São Paulo), Denise Crocce Romano Espinosa (Escola Politécnica da Universidade de São Paulo), jORGE alberto soares tenório (Escola Politécnica da Universidade de São Paulo)
Abstract:
The demand for natural resources has grown over the years, however, the environment offers a limited amount of these resources for exploration. Then, the investigation of new methods for recovering and reuse some compounds and elements are essential to know later tailings purposes. Zinc is used in corrosion resistance as a protective coating for several products. One of the steps for the extraction of zinc is by flotation process to obtain the concentrated ore, in which a residue is generated. The aim is to characterize this residue, allowing the choice of recovery routes for compounds and elements in future stages. The methods of analysis were Malvern, VA, Eltra and ICP-OES, besides the water content. In this study, a characterization of elemental chemical analysis was performed, in which the main elements presented were: calcium (17.4%), magnesium (10.3%) and iron (7.97%); the water content was 27% and the grain size of the material presented an average size of 50um. With the presented characteristics the material can be used, after treatment, in the recovery of other compounds for applications in the sector of fertilizers, ceramics and steel industry.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): Alice de Souza Toffolo (IFRN-CNAT)
Abstract:
One of the main activities in the municipalities of Rio Grande do Norte is the mining of ornamental rocks, which are products that integrate most of the world's production, these have unfolding and processing conditions for ornamental and cladding purposes. Diamond wire is the most widespread rock cutting technology in the world today and also the most beneficial. The present work aims to evaluate and compare the efficiency of diamond wire in ornamental rocks such as Pegmatito, Gabro and Limestone, in the quarries of Parelhas, Caicó and Apodi, located in the state of Rio Grande do Norte. Our data were collected using bibliographical researches, use of diamond wire, and data collection in loco. The results of the research show the comparisons of each quarry and its due characteristics of work with the use of the wire
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): thamiris auxiliadora gonçalves martins (Departamento de Engenharia Química, Escola Politécnica da Universidade de São Paulo), Isabela Falconi Brandolis Alves (Departamento de Engenharia Química, Escola Politécnica da Universidade de São Paulo), Viviane Tavares de Moraes (Instituto Mauá de Tecnologia, São Caetano do Sul), Marcela dos Passos Gallluzzi Baltazar (DEPARTAMENTO DE ENGENHARIA QUÍMICA, ESCOLA POLITÉCNICA DA UNIVERSIDADE DE SÃO PAULO), Jorge Alberto Soares Tenório (DEPARTAMENTO DE ENGENHARIA QUÍMICA, ESCOLA POLITÉCNICA DA UNIVERSIDADE DE SÃO PAULO), Denise Crocce Romano Espinosa (DEPARTAMENTO DE ENGENHARIA QUÍMICA, ESCOLA POLITÉCNICA DA UNIVERSIDADE DE SÃO PAULO)
Abstract:
Reverse flotation process is a method used for remove impurities from the most abundant iron ore; the itabirite. In this process, amines surfactant are used which may prevent the reuse of water in processes. The Fenton oxidative processes and the synthesis of nanoparticles are highlighted in catalysts application and in organic substances degradation. This study performed the synthesis of copper nanoparticles (CuNPs) to employ them as catalysts of the modified Fenton reaction to degrade an amine surfactant used in reverse flotation and compared with the classic Fenton (Fe2+) reaction. CuNPs were synthesized by chemical reduction, pH 11 with copper sulfate and ascorbic acid. They were characterized by UV-Vis, DRX and DLS and Zeta potential. The nanoparticles had diameters of 125.00 to 17.22nm and stability during 50 days. The tests were prepared with 180mg/L of amine and 1890mg/L of H2O2 in 150 minutes. The degradation was assessed by UV-Vis and FT IR. The results showed that CuNPs degraded 84% of the surfactant while Fe2+ reached 89%. In this way, both processes can be used for surfactant degradation, although the CuNPs method is easier to operate at neutral pH.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): Beatriz Peralta oruê (universidade do estado de são paulo), Denise Crocce Romano Espinosa (Universidade do Estado de São Paulo), Jorge Alberto Soares Tenório (UNIVERSIDADE DO ESTADO DE SÃO PAULO), Marcela dos passos Galluzzi Baltazar (UNIVERSIDADE DO ESTADO DE SÃO PAULO)
Abstract:
Manganese, a toxic mineral, related to manganism may have high added value for the steel industry. The difficulty in obtaining manganese encourages the exploration of new secondary sources such as the lateritic nickel effluent. In Brazil, nickel reserves are predominantly lateritic, making the country a potential producer. For the tests, a synthetic solution was used which simulates the lateritic nickel effluent from leaching. The oxidative precipitation with ozone occurred at the oxygen flow rates: 0.5; 1.0 and 2.5L/min, at the original pH 1.5 at 21°C in a 500 mL bubble column reactor. O3 was produced in the benchtop generator feed by 99% oxygen. The ozonation time was determined by the oxidation potential1.55V. The ozonated solution was centrifuged and filtered. The filtrate and collected samples were characterized in ICP-OES. Optimization tests with ultracentrifuge were performed. The best precipitation reached 97% at 0.5L/min O2 at 6.07 ± 0.045mg/min of O3 dosage and resulted in a solution 10-15mg/L Mn+2, above 1mg/L, maximum value acceptable by Conama 2011, to be retreated before being discharged into the water body or being reused as a manganese source.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): OTAVIO DA FONSECA MARTINS GOMES (UFRJ)
Abstract:
Maghemite is a mineral formed from magnetite oxidation at low temperatures, an intermediate term of the magnetite-hematite series. Maghemite could be misidentified as magnetite by X-ray diffraction, and/or as hematite by spot chemical analysis. Nevertheless, non-stoichiometric magnetite was detected and quantified in samples of Brazilian soils and iron ores by the Rietveld method refinement of its structure. The results were confirmed by optical microscopy and Raman spectroscopy, thus validating the method. X-ray diffraction with the refinement of the isomorphic substitution of Fe2+ by Fe3+ along the magnetite-maghemite solid solution could help to suitably characterize maghemite in iron ores.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): mauro froes meyer (ifrn/cnat/diaren)
Abstract:
This article is based on a bibliographical review of a field work that was done in the Salina São Camilo in the region of Mossoró - RN. The general objective of this research is to present the main exploratory and beneficiation aspects of salt production. Among the aspects of salt is the properties of salt, history and mining, besides the aspects of environment and work safety. However, this research resulted in preliminary data, but it would be interesting to be more thorough so that the extraction of salt in the academic world is disclosed.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): mauro froes meyer (IFRN/cnat/diaren)
Abstract:
This research is based on a bibliographical review of a field work that was done in the municipality of Parelhas / RN. The area explored, in turn, is known for its richness of mineral resources that are present in pegmatitic rocks. The general objective of this research is to characterize the main properties of the pegmatites and quartzite, in order to verify the heterogeneity of the elements, to raise a possible viability of extraction for economic purposes. The quartzite also presents a siliceous chemical composition. This rock is a source of bricks and silica refractories used in the steel industry and for the preparation of the blast furnace bed, ornamental rock used in different ways (rustic, carved, polished, among others). However, this research resulted in preliminary data, but it would be interesting to be more detailed in order to evaluate the economic viability of these rocks.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): KAREN ESPINA GOMES (Universidade de São paulo), Thamires Auxiliadora Gonçalves Martins (Universidade de são paulo), Amilton barbosa botelho junior (UNIVERSIDADE DE SÃO PAULO), denise rocce Romano Espinosa (UNIVERSIDADE DE SÃO PAULO), jorge Alberto Soares tenório (universidade de são paulo)
Abstract:
The present work aims at the synthesis of nanoparticles of copper by chemical reduction in microwave oven. The solution used comes from the selective copper precipitation of the lateritic nickel leachate. The copper solution (20mL) was placed in a beaker, and 2mL of 100g/L ascorbic acid and 20mL of 20g/L sodium citrate were added in that order and at room temperature. The pH of the mixture was corrected with 1M sulfuric acid or 2M sodium hydroxide. Then the mixture was placed in a microwave oven. The effect of pH, time and microwave power were evaluated. The morphology, composition and size of the particles were verified in Scanning Electron Microscopy with Energy Dispersion Spectroscopy (SEM/EDS). Results showed that the particles formed had no nanometric size. This may have occurred because the reducing action of ascorbic acid together with sodium citrate generates a very rapid reduction rate, which makes it impossible to form particles on a gauge scale. Particles synthesized at pH 4, after 4 minutes of reaction with 1000W of power presented particles with spherical morphology and only copper in the composition.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): mauro froes meyer (ifrn/cnat/diaren)
Abstract:
In the West Potiguar, in the regions of the Açu Valley, Mossoró, and Chapada do Apodi there is limestone information about 20 square miles (with a thickness ranging from 50 to 400 meters). That limestone is essential raw material for the manufacture of products for an agriculture, is known, and especially for a civil construction. The rock is used for several productions, among them it is used for the production of cement, lime, fertilizers, ornamental rocks. With this, we aim to evaluate the mineral of limestone in the state of Rio Grande do Norte, as well as its use in the production of the most varied products.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): livia Mara candido (CSN - Mineração)
Abstract:
Rejects generated in mining projects usually do not have associated economic value. Most of the ore beneficiation processes occur by wet process with a higher fraction of water and ultrafine granulometry, which makes it difficult to dispose of these wastes. In 2013, studies with new tailings treatment and filtering technologies were initiated with the objective of eliminating the disposal of the residue generated in the industrial process to wet in dams. In this context, we tried to evaluate an alternative for the dewatering of the sludge and the tailings, aiming at their disposal in piles. Essentially, we sought to consolidate the application of the high-pressure filtration technology for the effluent dewatering, in order to allow its transport and its disposal in a sustainable way. The studies performed in a pilot filter showed good performance and allowed the industrial implantation. The studies and geotechnical indications of composite tailings (flotation and sludge) make it possible to dispose of the tailings in piles due to their better values of humidity, which allows them to be safely stacked
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): fernanda ferrante (CSN MINERAÇÃO), EDUARDO PENA CARVALHO (CSN MINERAÇÃO), WAGNER REIS MODESTO RIBEIRO (CSN MINERAÇÃO), JEFERSON DAVI DE JESUS LIMA (CSN MINERAÇÃO), DONIZETE GONZAGA DE MEDEIROS (CSN MINERAÇÃO)
Abstract:
CSN Mineração S.A. is the second largest exporter of iron ore in Brazil and is among the five most competitive in the market. Casa de Pedra currently has an approximate production capacity of 30 million tons per year. The fleets of small trucks 6x4 and 8x4 models are responsible for the ore movement, traveling an average distance of 10 km between origin and destination. 116 trucks of this size are used in CSN Mineração for the handling of products. Every month this fleet consumes an average of 550,000 liters of fuel. The objective of the work is to do a fuel consumption analysis by truck through the embedded telemetry system. The reports generated through this system provide the specific consumption of each equipment and also the specific consumption of each Driver. As reports are generated it is possible to assess which equipment had a higher specific consumption and, in this case, the respective trucks with greater consumption are directed to the Maintenance team for analysis and action in the event that a problem is identified in the equipment. At the same time, the analysis of the drivers who had the highest specific consumption and conducted a practical and theoretical * Contribuição técnica ao 20º Simpósio de Mineração, parte integrante da ABM Week 2019, realizada de 01 a 03 de outubro de 2019, São Paulo, SP, Brasil. training, addressing the techniques for a safer and therefore economical direction, is carried out. In 2019, the economy of fuel consumption type S10 was 204 thousand liters, which represents 9% of all consumption foreseen for the period.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): ADRIEL DE BRITO MACIEL TRINDADE (METSO FUNDIÇÃO, SOROCABA, SÃO PAULO, BRASIL / FACULDADE de Tecnologia José Crespo Gonzales, Fatec Sorocaba), LUCIANA SGARBI ROSSINO (FACULDADE DE TECNOLOGIA JOSÉ CRESPO GONZALES, FATEC SOROCABA / Universidade Federal de São Carlos - UFSCar Campus Sorocaba), GILSON NEVES DA SILVA (METSO Fundição, Sorocaba, São Paulo, Brasil)
Abstract:
The target of this work is to analyze the influence of the variation of manganese and chromium contents on the abrasion wear of Hadfield austenitic manganese steels, applied in crushers of ores and to verify the work hardening mechanism. This steel is very important for the mining business and consequently for the Brazilian economy. For that, some alloys were produced varying the manganese range from 12 to 21% and chromium form 0,31 a 2,06 %. The wear resistance was determined by means of microabrasion tests using fixed spheres. For the analysis of the work hardening mechanisms, impact tests were performed by hammering, followed by optical microscopy and hardness profile. Results evidenced the Hadfield steel with higher manganese content and addition of chromium presented higher resistance to abrasion wear. It was observed the main mechanism acting on it was deformation twins, which may elevate the hardness of such steels in more than 4 times when compared to its initial hardness. The manganese content has more influence on the wear resistance.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): FLANELSON MACIEL MONTEIRO (INSTITUTO FED EDUCACAO, CIENCIA E TECN RIO GRANDE NORTE), Bruna Pereira do Nascimento Souza (IFRN), Anna Beatriz Almeida Leandro da Costa (IFRN)
Abstract:
Clays are essential raw materials for the production of ceramics, being popularly known for their coloration after the sintering process, where basically they have red, white and their variations. The red color, usually found in bricks, tiles and tiles, is acquired by the iron oxide (Fe2O3) present in the clay material. On the other hand, the white coloration is a result of the low amount of Fe2O3 and the high percentage of aluminum oxide (Al2O3). However, despite having a vast potential for use in the ceramics industry, the kaolinite clays, known as white burn, are not easily found by industry. The main challenge to increase the quantity of pieces produced with this type of clay is the prospecting of new deposits. Therefore, the objective of this work is to study the technological properties of a kaolinite clay from the municipality of Boa Saúde - RN. The work was started with the sampling process and the processing of the material. The clay was collected, destorated, comminuted and sieved in an ABNT 200 mesh (74mm) sieve. After this step, thirty (30) test specimens were made, for that a hydraulic press with a pressure of 21MPa was used. The sintering process was carried out in a muffle furnace without protective atmosphere at temperatures of 850°C, 950°C and 1050°C, with a heating rate of 10°C/min and a 60 minute isotherm plateau. At each temperature ten (10) specimens were sintered. In order to evaluate the technological properties, the following tests were used: water absorption (AA%), linear retraction (RL%), fire loss (PF%), apparent porosity (PA%) and apparent specific mass ). At the end of the characterization process, the clay presented a beige coloration and variations of this tonality, corroborating with the result of the EDX analysis that showed a low amount of iron oxide (Fe2O3), soon defining it as being of white burn. The results of the technological tests showed that the ceramic pieces have properties that point to the fabrication of structural ceramics and coatings.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): Eduardo Henrique marsola nino de Guzman (PMI-EPUSP), mauricio guimaraes bergerman (PMI-EPUSP)
Abstract:
The mineral or rock abrasivity it’s a theme with extreme importance in the mineral industry and it is usually measured through the Bond Abrasiveness Index (AI). However, the test restrains the samples both for the granulometry used in the test, between ½” and ¾”, as well in mass, being necessary 1600 g for each test, beyond the time of about 60 minutes. Aiming the study of abrasiveness of fine materials, the objective of this paper is the development of an modified LCPC test, using fine granulometry, in the order of 1,0 mm or less,, to predict the wear in transport pipes, anticipating possible failures in function of the alteration of abrasiveness features of the material that is being processed, being able to use materials of the prospecting stage, drilling, pre-concentration and flotation streams.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): rogério Felito da Silva (Universidade federal de são carlos), Bráulio salumão de oliveira (UNIVERSIDADE FEDERAL DE SÃO CARLOS), daniel rodrigo leiva (UNIVERSIDADE FEDERAL DE SÃO CARLOS)
Abstract:
Low-density steels and high-modulus steels are aimed at the manufacture of lighter cars and have a growing interest by industries and research centers. Patent documents are an essential source of information for analyzing the development of a technological sector, as well as supporting decision making. This work aimed to elaborate and analyze indicators, based on information contained in patent records, in low-density steels and high elastic modulus steels. Several alloying elements and reinforcements were mapped to increase specific strength and microstructure control, especially for applications in the automotive industry. Both technologies are of recent interest and are in an emerging stage of development. The properties of ductility, tensile strength and impact resistance are among their main technological challenges, as well as cost reduction.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): luisa coelho de carvalho (Universidade federal de sao carlos), Murillo romero da silva (universidade federal de sao carlos), Claudemiro Bolfarini (Universidade federal de são carlos), Piter gargarella (universidade federal de São Carlos)
Abstract:
Ti β alloys present outstanding properties as a high strength combined with a low elastic modulus. Among these alloys, the Ti-Nb-Ta-Zr (TNTZ) known as Gum Metal have been receiving greater attention nowadays. These alloys exhibit low elastic modulus, superelasticity and superplasticity and are suitable materials for the manufacture of stents and implants. For the Gum Metal production, it is recommended an addition of oxygen, as well as an accentuated cold work. In this work, a Ti-29Nb-13Ta-4.6Zr-0,07O (%wt.) Gum Metal was produced by severe plastic deformation through High Pressure Torsion (HPT) followed by an aging heat treatment. The aim of this work was evaluate the influence of processing route, analyze the microstructural evolution, phase stability and phase formation, as well as the hardness of the Ti-29Nb-13Ta-4.6Zr-0,07O (%wt.) alloy. The samples were characterized by optical microscope (OM), X-ray diffraction (XRD) and Vickers microhardness. OM and XRD analysis show a greater stabilization of β phase, as well as the formation of ω phase after the HPT and aging treatment. After HPT, an increase in microhardness was observed due to the severe plastic deformation imposed to the sample. An increase in microhardness was also observed after the aging treatment, which is direct related to the observed microstructural modification.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): GIOVANNA LORENA CARNEIRO COSTA (PONTIFÍCIA UNIVERSADE CATÓLICA DE MINAS GERAIS), Vinícius Freitas Paixão (PONTIFÍCIA UNIVERSADE CATÓLICA DE MINAS GERAIS), ANA PAULA SILVA (PONTIFÍCIA UNIVERSADE CATÓLICA DE MINAS GERAIS)
Abstract:
A way to detect macro inclusions is through ultrasonic testing, although the analysis and interpretation of the test results are difficult to understand. With the results of inspection, we have information regarding the location of the macro inclusions and therefore their distribution throughout the material. However, establishing criteria to classify the material as to its purity has been a difficult task. The present paper aims establish a data analysis tool to be used for quality control of materials. The results show a positive feasibility of applying this analytical model to evaluate the level of purity of hot-rolled steels.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): tiago araujo ricci (universidade são francisco)
Abstract:
This project aims to map the manufacturing flow of a 5-axis CNC machine from the LNLS machine shop to identify the causes of low process productivity. Through quality management, statistical tools were used to analyze various facts and data. The data were collected through meetings with sector employees and follow-up of the production process. During the mapping period, it was noticeable that the work performed on the machine in question does not have repeatability, since it is not a series production, with priority being the machining of prototypes for the Sirius project. During the process follow-up, the machine was idle for approximately 14 hours, indicating a low level of production taking into account that the cutting process of the part is automated, but there is a need to perform the manual setup of the machine with each new part which is introduced. From this analysis, it was possible to conclude that it is possible to distribute the activities of the operator while machining a part, in order to increase efficiency during the interval of time in which there is the idleness of the operator as a result of the current process.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): MARCOS VINICIUS FONSECA FERREIRA (ufop), Daniela Barçante Perasoli (gerdau), Tatiane Suelen Santos Silveira (ufop), Graziele Gianini Braga Maria (ufmg), Dagoberto Santos Brandão (ufmg), Dalila Chaves Sicupira (ufop)
Abstract:
Duplex stainless steel combines the mechanical properties of ferrite with corrosion resistance of austenite and is widely used in industrial applications in which high performance on such properties are required. When subjected to intense deformation, austenite partially transformed to martensite, increasing the strength of steel. When the steel is annealed, this transformation is reversed and a martensite is transformed into austenite, resulting in a grain refining material. Secondary phases formed during annealing can impair its mechanical and corrosive properties. In this sense, the aim of this work was to evaluate the effect of the annealing temperature on the corrosion resistance of the cold rolled stainless steel UNS S32304 duplex. The steel was subjected to cold rolling, with 60% thickness reduction, and after annealed at temperatures of 600°C, 700°C, 800°C and 900°C for 0.5 h. The corrosion resistance was studied by the potentiodynamic polarization technique. Strain induced martensite (SIM) formation was noticed after cold rolling, and a partial reverse transformation was seen after annealing at 600ºC. The occurrence of SIM promoted pitting potential reduction and the increasing annealing temperature increased localized corrosion resistance.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): Lucian Machado mendes de melo (Ifba)
Abstract:
In machining process is fundamental to evaluate the machinability of materials. Especially for the austenitic stainless steel which represents a very importance for engineering, due its high corrosion resistance associate to good mechanical properties. Increasing the life of cutting tool, can improves the productivity of process, optimizing the tool change time and reducing expenses with inserts. In addition, excessive wear causes poor quality of finished surface (increased roughness) and increases the production time, resulting in higher manufacturing costs. This paper presents a progressive analysis of wear of cutting tool by analyzing the material finished surface. The presented methodology provides the lifetime of cutting tool, and by analyzing the tool cutting speed and wear curves establish the exact moment to change the tool.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): FLANELSON MACIEL MONTEIRO (INSTITUTO FED EDUCACAO, CIENCIA E TECN RIO GRANDE NORTE), Anna Beatriz Almeida Leandro da Costa (IFRN), Bruna Pereira do Nascimento Souza (IFRN)
Abstract:
The clay is a material of sedimentary origin of fine granulometry, around 0.002mm, found with ease in the terrestrial sphere. The variations occurring in the clays are due to its intemporal process, including the aspects that determine the concentration of each chemical element present in its composition. The coloring of the products manufactured with these materials is the result of these variations. However, among the different types of clays, those with a lower amount of ferrous oxides have a coloration between beige and yellowish at the end of the production process. This clay is known as white burn because of the color shades acquired after the sintering process and although it may have similar applicability to red, it is not commonly found by industry, which makes its value significantly higher. The State of Rio Grande do Norte has deposits of this material in its territory, for example, the municipalities of Nova Cruz, Macaíba, São Gonçalo do Amarante, Brejinho, Goianinha and Boa Saúde, where samples of the material were collected studied in this work. Therefore, the purpose of this study is to analyze the technological properties of ceramic masses, made with a clay from the city of Boa Saúde-RN, for application in the ceramic tile industry. The experimental procedure was started with the sampling and the beneficiation of the material, which was comminuted and sieved in an ABNT 200 mesh sieve. At the end of the process, all raw materials used had a final particle size of 0.074mm. The compacting process of the specimens was done in a hydraulic press with a pressure of 21 MPa. The samples were then sintered in a muffle furnace, without protective atmosphere, at temperatures of 1000 ° C and 1100 ° C, with a heating rate of 10 ° C / min and a 60 minute isotherm plateau. In total, a total of forty (40) specimens were prepared, and twenty (20) samples were sintered per temperature. The technological properties of the samples were measured using the following tests: water absorption (AA%), linear retraction (RL%), fire loss (PF%), apparent porosity (PA%) and apparent specific mass ). Finally, after analyzing the results, it was observed that the studied material can be destined for the ceramics sector porous coatings, especially for the presented results of AA% and PA%.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): Francisco carlos gomes da silva junior (Universidade federal do ceará)
Abstract:
ASTM 890 grade 3 stainless steel duplex (AID) has great use in the oil tube industry in Brazil and worldwide. The material of the time variation necessary to solubilize a material is important, therefore, by decreasing this time, it can become spent with an furnace. The objective of this paper is the comparison of results for the different solubilization times of ASTM 890 grade 3A molten duplex stainless steel. A literature indicates that a solubilization a year must have the temperature of 1120 ° C, in the period of 4 hours. However, there are no results that show the influence of time intensity on the corrosion resistance of this material. In order to analyze it, 3 thermal intervals were made at 1120 ° C, in times 30 minutes, 2 hours and 4 hours. Grade 3A is characteristic, for example, it does not cover its composition, for example 1% w M and also 25% w Cr. The study was made a microstructural analysis under optical microscope to observe the differences in the phases of the material. Then, electrochemical tests of open circuit potential, impedance spectroscopy and anodic polarization, using a 1M NaCl electrolytic system, were used to verify the corrosion in the alloy. The test was made a review of the steel being exposed to tests of microhardness. Finally, the results were obtained with which expectations do not evolve.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): Gustavo yuji hayashi (Universidade federal de são carlos)
Abstract:
Al-based quasicrystalline-phase former alloys (QC) have a high mechanical strength and wear resistance, especially at high temperatures, which make them promising in applications as molds and dies. For the formation of the QC phase, a high cooling rate must be imposed to the material, usually being obtained only in powder or ribbons. Among the consolidation methods of these materials, there is the hot uniaxial compaction (HUC) process, which applies pressure and temperature during compaction. No study was carried out on the application of HUC to the Al91Fe4Cr3Ti2 alloy. Thus, the present work aimed to produce samples by HUC, characterize and understand the microstructure of recycled quasicrystalline-phase former Al91Fe4Cr3Ti2 alloy. For this, samples were manufactured by HUC using loads of 1 and 1.5 GPa, temperature of 350ºC and compaction time of 1 h. These samples were characterized by X-ray diffraction, differential scanning calorimetry, optical microscopy, scanning electron microscopy and density measurements by Archimedes method. It was observed that a higher compaction load promoted samples with higher density (2.85 g/cm3) and lower porosity (7%) and it was observed the presence of QC phase in the samples produced.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): RENATO OKABAYASHI MIYAJI (ESCOLA POLITECNICA DA USP)
Abstract:
The new technologies of additive manufacturing can expedite not only the development, but also the prototyping in the steelmaking industry. Therefore, many stages of the productive process can have their efficiency increased, aiming to obtain a final product with higher quality, saving human, economic and operational resources. In this scenario, this undergraduate research project aims to increase the efficiency of the ladle’s teeming to the tundish, through the development of an anti-vortex device for the superior valve of the steel ladle. New geometries and formats were tested in this project through the Design of Experiments (DOE) methodology, using the additive manufacturing in a reduced scale model. Subsequently, computational fluid dynamics (CFD) simulations were executed, in order to comprehend the phenomena and the results.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): JESSICA CAETANO FORTES MONTEIRO (universidade Federal de ouro preto), Raphael França Assumpção (universidade federal de ouro preto), Graziele Gianini Braga Maria (universidade federal de minas gerais), Dagoberto Brandão Santos (universidade federal de minas gerais), Dalila Chaves Sicupira (universidade federal de ouro preto)
Abstract:
The aim of this study was to evaluate the effect of the annealing time in the corrosion resistance of a cold-rolled UNS S32205 DSS. When duplex stainless steel is subjected to heavy deformations austenite partially transformed to martensite, increasing the strength of steel. After annealing this transformation is reversed, that is, the martensite is transformed into austenite. However, these steels have a strong tendency to form secondary phases when exposed to determined temperatures for an interval of time, that lead to deterioration of the mechanical and corrosive properties of them. The studied steel was cold-rolled up to 60% reduction in thickness, and then annealed at 850°C, temperature which the kinetics of secondary phases precipitation is maximum, for 300, 600, 1800 e 86400 seconds. For microstructural analysis was used optical and electron microscopy, and X-ray diffraction. The corrosion resistance was studied by electrochemical impedance technique, using 3,5% NaCl solution. The increase of annealing time increased precipitation of secondary phases which leads to formation of regions depleted in Cr and Mo. With the increase of annealing time, the depletion is partially recovered by the diffusion of these elements, improving the corrosion resistance.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): WILLY ANK DE MORAIS (unaerp), Luan Matheus Peres (UNAERP), Érika Elis Kuo (unaerp), Marcelo Costa Choukri (unaerp), Márcio de Morais Tavares (unaerp)
Abstract:
Eventually it becomes necessary to do adaptations in concrete structures during or after their execution, in order to adequate components in reinforced concrete. Such changes, as not provided in the design of that structures, may compromise the load resistance of such structures, invariably necessitating the introduction of a structural reinforcement. The most well-known and used techniques for reinforcements in reinforced concrete structures are: addition of steel bars, steel plates, carbon fiber and external protension. Additionally, practical tests make it possible to quantify the efficiency of an adopted reinforcement choose, including in order to verify the efficiency between the structural adhesion of the materials involved. The method of reinforcing structures by means of additional rebars is the technique most commonly used today because it is easy to execute, does not require specialized labor and has the best cost x benefit. Therefore, this work evaluated the efficiency of structural reinforcement of a beam, which was subjected to a hole not predicted in the design, using the method of adding rebar and steel bars in the traction region of the beam. The results obtained were compared to those observed in a concrete bar with normal steel area.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): VICTOR BARBOSA DE SOUZA (UFF / UENF / UNIREDENTOR), Almiro Gonçalves dos Santos Junior (UFF / UENF / UNIREDENTOR), Igor de Sá Pimenta (UFF / UENF / UNIREDENTOR), Amanda Camerini Lima (UFF / UENF / UNIREDENTOR), Niander aguiar cerqueira (Uff / uenf / uniredentor)
Abstract:
The Construction industry in the world has sought to build more efficient systems in order to increase productivity, reduce waste and meet a growing demand, embedding itself in this frame steel structures. Through the presentation of concepts, advantages and disadvantages, we will study the technical and economic feasibility of a commercial structure in the steel at Faculdade Redentor, Itaperuna, Rio de Janeiro, comparing with the conventional building system, reinforced concrete cast. To do so will produce a budget structure of a steel building compared to a building with reinforced concrete. After the presentation of data will be discussed the costs of these structures, taking into account the benefits of each enterprise for the purpose of verifying that a building in the metal structure is viable or not. In this project there is also the use of structural steel is feasible technically and economically, due to the advantages offered by this construction material. .
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): WILLY ANK DE MORAIS (WILLY ANK SERV APOIO ADMIN SET), Cícero Lopes de Souza (UNAERP), Mateus Araújo e Silva (unaerp), Márcio de Morais Tavares (unaerp), Érika Elis Kuo (unaerp)
Abstract:
Steel structures are used in several applications in civil construction, with advantages related to other types of constructions, such as lightness and speed in the execution of the work. However one of the biggest problems in this type of construction system is the atmospheric corrosion to which the structural steel used will be subjected. With the objective of evaluating the resistance to atmospheric corrosion, in this work, exhibiting panels were constructed, in accordance with NBR 6209, to maintain common and skid structural steel specimens for an initial period of seventy days in two distinct locations, categorized with environmental aggressiveness I and III, respectively inland and coastal in the state of São Paulo. On the surface the degradation process was clearly differentiated, with the same result being pointed out by the alteration of the mass of the samples, which increased during the exposure to the aggressive environment III, since the formed corrosion products did not break off in the short time of the test. Although it is considered that the standard stipulates a minimum time of two years for the test, which is still in progress, this study points out the need to adopt much more severe corrosion protection mechanisms in the coastal regions.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): Joelson Inacio Dantas Teixeira (IFRN), Flánelson maciel monteiro (ifrn)
Abstract:
Raw material is one of the main purposes in the industry. Among the main characteristics of this material is the earthy, fine granulometry and molding function due to the plastic consistency that requires the presence of water. In the case of ceramic coating, these can be classified according to process characteristics, technological properties and applications. The corrosion of the support is a factor of great technological importance and classifies the coatings in products of red color and products of white color. However, this work has the objective of studying the technological properties of a white clay, from the city of Vera Cruz / RN, located in the micro-region of the potential agribusiness, with the objective of obtaining the technical information and indicating its economic viability. For this, the specimens were prepared by uniaxial pressure, using a hydraulic pressure with a pressure of 21 MPa. As samples were sintered in a greenhouse oven at temperatures of 900 ° C, 1000 ° C and 1100 ° C, with a heating rate of 10 ° C / min and a 60 minute isotherm. The technical variables were analyzed using linear retraction (RL%), apparent appearance mass (MEA), water absorption (AA%), fire loss (PF%) and apparent porosity (PA%). The absorption chemistry was made by X-ray fluorescence (FRX). This study is not used the knowledge of a components in the main content of mineral components and to be used to compose ceramic rocks, especially by its clear colouration, however the values of AA used industrial, especially in the coatings industry.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): Vitória lima de souza (UFC (CAMPUS DO PICI)
Abstract:
The use of green inhibitors in the corrosion of SAE 1020 carbon steel is an economical and environmentally accessible alternative because, regarding to the commercial inhibitors generally used, they are easily obtainable, and since they are acquired from vegetables, don't represent a risk to the environment. Thus, the present work aims to evaluate the use of aroeira leaves as a corrosion inhibitor for SAE 1020 carbon steel, which is widely used in industry and has low corrosion resistance. The choice of aroeira was due to the fact that the plant is originated from Brazil and is abundant in the Northeast of the country, mainly in Ceará. For analysis, a corrosive medium was used: 0.1 M H2SO4, 3.5% NaCl and NaCl (pH = 4.0); the inhibitor concentrations were: 50, 200, 500 and 1000 ppm. In relation to the electrochemical techniques, Open Circuit Potential (OCP), Electrochemical Impedance Spectroscopy (EIS) and Linear Polarization Curves (CP) were used. Thus, through the analysis of the mentioned techniques, it was possible to obtain the behavior of the inhibitor in relation to the material and the medium, as well as to evaluate the best medium for the use of aroeira as a green corrosion inhibitor.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): Elizeth oliveira alves (UFPE)
Abstract:
Due to the hazardousness nature of the electric arc furnace dust (EAFD), alternative practices, as reinsertion of waste into the steelmaking process, or its incorporation into other materials, have led the recycling has become a route for this by-product. The aim of this work was to identify technological development areas of the use of EAFD, evaluate the potential of reuse and recycling of waste arising from production of carbon steel, comparing the characteristics obtained from EAFD examined with requirements indicated by an analysis of patents. EAFD generated in the state of Pernambuco was characterized by X-ray fluorescence (XRF), size separation of particles by sieving, X-ray diffraction (XRD), Scanning electron microscope (SEM) plus Energy dispersive spectroscopy (EDS) analysis technique. Technology prospecting was con-ducted in EPO European international patent databases and INPI national databases. The analysis carried out show that waste had approximately 28,5% of particle size less than 53μm, composed in its majority by iron and zinc in the form of oxides, present as phases franklinite, zincite and magnetite. The small particle size and chemical composition allow its application in the field of ceramic materials, and reinsertion into the steelmaking process. The waste studied had similar characteristics with other wastes observed in patents.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): MARCIO DE MORAIS TAVARES (UNIVERSIDADE DE RIBEIRÃO PRETO - UNAERP CAMPUS GUARUJÁ), Marcela dos Passos Galluzzi Baltazar (USP), Lidiane Maria de Andrade (USP), Denise Crocce Romano Espinosa (USP), Bruno Karolski (USP), Jorge Alberto Soares Tenório (USP)
Abstract:
Contamination of soils and the hydrological environment by hydrocarbons of long chains, generally due to ruptures of ducts or by accidents occurred in their transport, affect the environment in a deleterious way. Aiming for future applications in soil and water remediation, there is a need for specific biodegradation studies, such as bacteria that use long chain oils as a source of carbon, in order to improve understanding of the interaction mechanism of oil and bacteria. Based on this reasoning, for the development of this work aimed at finding, studying and understanding the metabolism of a microbiota capable of using long chain hydrocarbons as a carbon source, bacteria lineages were isolated from a community found in oil sludge. This bacterial community has evaluated its biodegradation power of several molecules, constituents of petroleum, as well as its metabolic preference for specific chains, resulting in a better understanding of the processing of petroleum derived components by microorganisms. The results of chromatography proved biodegradation by reducing the peaks, and by studying the chromatograms it was was possible to identify the biodegradable substances.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): Letícia dos santos aguilera (Instituto MILITAR DE ENGENHARIA), Ana Carolina Accioly Monteiro (Instituto Militar de Engenharia), Ana Luiza Buse da Silva (Instituto Militar de Engenharia), Barbara da Costa Araujo (Instituto Militar de Engenharia), Beatriz Luberiaga Bezerra (Instituto Militar de Engenharia), Thainá Lucciola Hipolito de Lima (Instituto Militar de Engenharia), André Ben-Hur da Silva Figueiredo (Instituto Militar de Engenharia)
Abstract:
Porous ceramics were produced with manganese ferrite nanoparticles using freeze casting, and it was possible to obtain a oriented porous ceramic. Two samples of porous ceramics were produced with PEG-4000 and PEG-8000 like dispersant binder, both using 8%w. SEM imagens showed a porous ceramics structure in both samples. Archimedes’ method was used to get the measures of porosity and apparent density and densification. The pure ferrite and the sintered samples were characterized by XRD and it was observed only the presence of the ferrite phase for pre-sintering samples and phase transformation from ferrite to Mn and Fe oxides after heat treatment. That results indicates the use of these ceramics as filtering elements.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): ANDRE BEN-HUR DA SILVA FIGUEIREDO (instituto MILITAR DE ENGENHARIA), Alexandre Bestwina (Instituto Militar de Engenharia), Caio da Silva Pontes (Instituto Militar de Engenharia), Gabriel Flintz Fraga Marques (Instituto Militar de Engenharia), Leonardo Paraíba Cidrão (Instituto Militar de Engenharia), Renan da Silva Ramos (Instituto Militar de Engenharia), Vilson Wenis dos Santos Belle (Instituto Militar de Engenharia)
Abstract:
The response to ballistic impact of alumina-ultra high molecular weight polyethylene (UHMWPE) composites with different relative concentrations of alumina was investigated. The impact tests were carried out at subsonic speed using a compressed air system. The best performance samples were the A00 and A90, being poor adhesion between the UHMWPE matrix and alumina particles. The depth of penetration (DOP) in a Medium Density Fiberboard (MDF) bulkhead protected by a disk of the composite decreased with increasing concentration of alumina in the composite.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): WILLY ANK DE MORAIS (unaerp), Guilherme Bernardo da Silva (UNAERP), Érika Elis Kuo (UNAERP), Marcelo Costa Choukri (UNAERP), Márcio de Morais Tavares (unaerp)
Abstract:
Unplanted holes are commonly drilled into beams without proper precautions at the time of their execution. In order to perform a hole on a structural element, a planning must first be carried out, to define the criteria of effectiveness and structural dimensioning according to NBR 6118: 2014, since these holes may end up interfering with the structural behavior of the beam. In this way, the present work has the purpose of studying the influence of the holes in the reinforced concrete beams in order to analyze if the structural element suffers a loss in its resistance because the hole was not planned at the moment of the beam sizing. For the accomplishment of this work three beams of reinforced concrete were dimensioned, where it was presented all the procedure of its construction, from the sizing of the beam with its calculation memorial, preparation of the forms and frame, concreting, execution of the holes with the loaded beam and analysis of cracks and cracks generated in the region of the holes. In order to validate the results obtained, all three beams were constructed and tested at the UNAERP University. The holes had a diameter of 50mm and even occurring loss of steel area did not influence the strength of the beams.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): VICTOR BARBOSA DE SOUZA (UFF / UENF / UNIREDENTOR), Kayan Afonso Carneiro (UFF / UENF / UNIREDENTOR), Lucas Souza Costa (UFF / UENF / UNIREDENTOR), Amanda Camerini Lima (UFF / UENF / UNIREDENTOR)
Abstract:
Nowadays the metal structures have a wide range of applications, being used for the construction of bridges, stadiums, sheds, oil rigs, airports, silos, deposits, among other numerous applications. In most cases, these types of structures have large size and suffer great efforts, so they are subject to failure. The fracture mechanics is a science where it studies the behavior of a certain flaw, the crack. Therefore, the present work was aimed at analyzing the behavior of cracks in steel structures, more specifically on a pedestal of an offshore crane manufactured in ASTM A-36 steel. To accomplish such a feat was necessary the metallographic assay and mechanical traction assays following the ASTM A-370 standard, and fracture toughness according to the British Standard-7448, development of a mathematical model for the pedestal according to mechanics classical, calculation of the criticality of three types of cracks being they, surface, through-thickness and embedded with the support of the British Standard-7910 and the calculation of the growth estimation of cracks. The entire methodological procedure of the work allowed the characterization of the microstructure of the material, determination of the mechanical properties of the material, the fracture toughness of the steel, the mechanical efforts that work on the pedestal, the criticality of the cracks and the maximum dimensions that the cracks will have to bring the structure to the collapse. The surface flaw obtained the largest dimensions for the collapse of the structure, being 22.2 mm deep and 88.83 mm in length. The through-thickness flaw has had the smallest dimension for the collapse, with a length of 63.67 mm. The embedded flaw presented dimensions of 24.99 mm in width and 66.015 mm in length. However, the cracks in their initial dimensions did not present any risk to the structures, however, the study was able to determine the maximum size that the cracks can achieve, being possible estimate the useful life of the element. .
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): VICTOR BARBOSA DE SOUZA (UFF / UENF / UNIREDENTOR), Anderson Padilha Pontes (UFF / UENF / UNIREDENTOR), Juvenil Nunes Oleiveira Junior (UFF / UENF / UNIREDENTOR), Amanda Camerini Lima (UFF / UENF / UNIREDENTOR), Niander Aguiar Cerqueira (UFF / UENF / UNIREDENTOR), Afonso Garcez Rangel (UFF / UENF / UNIREDENTOR)
Abstract:
Through the search of the feasibility of usage of paperboard tubes in engineering projects it has become necessary to study deepening this material. Following the ABNT NBR rules, some absorption tests have been carried out with unprotected and protected samples through the usage of waterproof. Shigure Ban, the famous Japanese architect, who uses and stands for the constructions using paperboard tubes, has been used as bibliographic backup. In the tests paperboard tubes 4 mm thick, collected from graphic offices of Itaperuna and region, have been used. The absorption results to the waterproof unprotected samples have varied from 140.04 to 153.31 (%). To the waterproof protected samples values from 81.05 to 96.51 ( %) have been found. The results have shown a significative difference to the absorption of the two samples tested. We can conclude that it is important to use waterproofing agents before carrying on the project. It is also of great importance the research of varied products to the impermeabilization, since this study has focuses its analyses in only one product. Altogether it can be said that engineering projects can be carried out totally or partially with the usage of paperboard tubes. It is up to the engineer responsible for the project to evaluate the best usage of the material, aiming for lower cost, safety and lower environment impact
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): VICTOR BARBOSA DE SOUZA (UFF / UENF / UNIREDENTOR), Juliana Henriques Siqueira Ladeira (UFF / UENF / UNIREDENTOR), Ricardo Siqueira Torraca Garcia Sanches (UFF / UENF / UNIREDENTOR), Amanda Camerini Lima (UFF / UENF / UNIREDENTOR), Jarilson de Souza Silva (UFF / UENF / UNIREDENTOR), Afonso Rangel garcez (UFF / UENF / UNIREDENTOR), Niander Aguiar Cerqueira (UFF / UENF / UNIREDENTOR)
Abstract:
It’s recurrent the tool detrition because of high temperatures, seeing that majority parto f the energy involved in the machining process is transformed into termal energy (Silva, et at, 2007). In order to have more system control were created analytical and experimental methods to know the real cutting temperature. The objective of this work is compare the cutting temperatures in the thinning and the finishing process in a proof body made bay stainless steal 304. The temperature was measured along the two processes by a infrared thermometer, obtaining by this way the experimental temperatures. To obtain the analytical temperatures, the Cook method was used. At the end, It can be seen that the cutting temperatures of the thinning process were higher than the finishing process, also looking that the analytical temperatures wee higher than experimental temperatures
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): WILLY ANK DE MORAIS (UNISANTA), Bruno Gonçalez Ribeiro (UNISANTA), Bruno Luiz Sperandeo (UNISANTA), Gerson da Silva Almeida (UNISANTA), José Samuel Silva Freitas (unisanta), Lucas Vilaronga Ramos (UNISANTA), Marcel Teixeira Vicente (UNISANTA), Matheus Antônio de Oliveira Ferreira (UNISANTA), Ricardo de Oliveira Almeida (UNISANTA), Stephanie Pedroza Rodrigues (UNISANTA)
Abstract:
The present work covers the study of a raw material transport system for the production of granular superphosphate, consisting in a sequence of three conventional belt conveyors and a cups elevator. The components of these equipment are portrayed apart and then the operation of the assembly is explained. Problems are presented in the performance of the equipment and the identified causes. For this reason, the economic viability of replacing the current equipment for a pipe conveyor, a more advanced system that is also detailed through the description of its components and operation. The analysis begins with the sizing of the two types of equipment according to the available plant. Then, the actual set is compared with the proposed one, considering the product waste, time and cost of maintenance stops, and the cost of implementing the new equipment.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): Elton volkers do espírito santo (Instituto federal do espírito santo), Flaviani Marculano Marchesi (instituto federal do espírito santo), Heitor Cristo Clem de Oliveira (INSTITUTO FEDERAL DO ESPÍRITO SANTO), Silas Gambarine Soares (INSTITUTO FEDERAL DO ESPÍRITO SANTO), Felipe Fardin Grillo (INSTITUTO FEDERAL DO ESPÍRITO SANTO), José Roberto de Oliveira (INSTITUTO FEDERAL DO ESPÍRITO SANTO)
Abstract:
The aim of this work is to use computational thermodynamics to study the properties of desulfurizing initial slags using mixtures with different fluxes: fluorspar, sodalite, aluminum dross, B2O3 and ilmenite. At first, the mixtures were defined and then simulations were performed for the heating of these mixtures at 1350 ºC by FactSage 7.2 software. Thus, the desulfurization factor (FDeS) was calculated for each mixture based on equilibrium conditions. The mixtures containing 5 and 10% of fluorspar and 5% of sodalite presented the highest FDeS. In contrast, mixtures with 10, 15 and 20% of B2O3 had the worst results in this analysis. Mixtures of the literature were also simulated in order to obtain the FDeS and relate it to desulfurization efficiency.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): ANDRE DOS SANTOS BARROS (UNICAMP), Clarissa Barros da Cruz (unicamp), amauri garcia (unicamp), noé cheung (unicamp)
Abstract:
Although the wear resistance resulting from the addition of third elements in Al-Sn alloys is generally the main property evaluated, not only the tribological phenomena are responsible for gradual deterioration of parts, but also the corrosion phenomena. Thus, the present study aims to analyze the effect of microstructural characteristics, formed during transient solidification of Al-9wt.%Sn-5wt.%Zn alloy, on the corrosion resistance in a 0.06M NaCl solution investigated by potentiodynamic polarization and electrochemical impedance spectroscopy. It was observed a microstructural morphology characterized by dendrites of the α-Al phase with concentrations of Zn in both the dendritic matrix and in Sn-rich regions at the interdendritic contours. The evolution of the primary dendritic spacings (λ1) was also correlated with solidification thermal parameters. Finally, it was verified that the sample with the coarsest microstructure, i. e., λ1 = 89.6 μm, showed comparatively lowest corrosion current density and highest polarization resistance.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): FELIPE BUBOLTZ FERREIRA (FUND LUIZ ENGLERT)
Abstract:
The continuous casting machine is one of the most important steel production steps in a melt shop. The tundish, a reservoir between the steelmaking ladle and the mold, has great influence over the steel cleanliness, along with the productivity bid. It must takes into account the quality of the metal and operational safety. Several different variables are related to the tundish process, of inclusionary cleanliness. Some of them are discussed in this paper: the free opening of ladle, tundish inertization, steel temperature in the reservoir and clogging formation, besides a brief topic about castability. Therefore, a critical analysis, with a review from some papers available in literature, is proposed in this study, with its focus on tundish
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): ANDRÉ OLIVEIRA GALON (Instituto Federal de Educação, Ciência e Tecnologia do Espírito Santo ), Caio Vaccari Silva (INSTITUTO FEDERAL DE EDUCAÇÃO, CIÊNCIA E TECNOLOGIA DO ESPÍRITO SANTO), Victor Bridi Telles (INSTITUTO FEDERAL DE EDUCAÇÃO, CIÊNCIA E TECNOLOGIA DO ESPÍRITO SANTO), Elton Volkers do Espírito santo (INSTITUTO FEDERAL DE EDUCAÇÃO, CIÊNCIA E TECNOLOGIA DO ESPÍRITO SANTO), Raphael Mariano de souza (INSTITUTO FEDERAL DE EDUCAÇÃO, CIÊNCIA E TECNOLOGIA DO ESPÍRITO SANTO), Felipe Fardin Grillo (INSTITUTO FEDERAL DE EDUCAÇÃO, CIÊNCIA E TECNOLOGIA DO ESPÍRITO SANTO), José Roberto de Oliveira (INSTITUTO FEDERAL DE EDUCAÇÃO, CIÊNCIA E TECNOLOGIA DO ESPÍRITO SANTO)
Abstract:
To meet the market demand for steels with increasingly lower phosphorus content, mastering the most efficient dephosphorizing methods is fundamental. Thus, the use of computational thermodynamics is extremely important, since the software simulations are a fast, safe and efficient way to obtain results in the area of steelmaking. In the present work it was proposed with FactSage 7.2 the analysis of the efficiency of dephosphorization of different fluxes: fluorspar, sodalite, B2O3 and soda ash; which were added to a standard dephosphorizing mixture of 70g, in the simulations the total mass was kept constant at 70g and the percentage by weight of the fluxing agents used in the mixture was 5 and 10%. As we have in literature that it is possible to correlate the dephosphorization factor (FDeP) with the efficiency, after made the calculation of the FDeP through the FactSage simulations, the correlation with the efficiency was done to know which the fluxes was the most efficient and what was the effect of increasing the weight percentage of the fluxes in the dephosphorizing mixture. Fluorspar proved to be the most efficient fluxe followed by the soda ash, and the highest efficiency was achieved when the weight percent of the fluxes was 5%.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): thiago araújo santos de oliveira (universidade federal de ouro preto), Weslei Viana Gabriel (UNIVERSIDADE FEDERAL DE OURO PRETO), Salvatore Giuliano Peixoto Tropia (UNIVERSIDADE FEDERAL DE OURO PRETO), João Victor Gomes Guimarães Ananias (UNIVERSIDADE FEDERAL DE OURO PRETO), Itavahn Alves da Silva (UNIVERSIDADE FEDERAL DE OURO PRETO), Carlos Antônio da Silva (UNIVERSIDADE FEDERAL DE OURO PRETO), Johne Jesus Mol Peixoto3 (universidade federal de ouro preto)
Abstract:
Slag entrainment during steel ladle drainage plays an important role in metallic yield, cleanness and continuous casting productivity. Physical and numerical models were employed in order to study the vortex and funnel draining flow in steel ladle drainage. A 1:6.5 scale ladle model has been used in order to assess the influence of drainage flow, initial liquid height, bath temperature and thermal stratification inside the ladle on the liquid critical height (Hcr) for vortex onset. In all experimental conditions, the value of Hcr proportionally increased with drainage flow. The sub-superficial velocity field developed during the last moments of drainage has been measured using Particle Image Velocimetry – PIV. Computational Fluid Dynamics simulations shows a good agreement with results from physical modeling, and it is able to describe liquid flow rate and temperature influence over Hcr value.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): Esaú Gomes Souza (Universidade federal do pará), Jeovan Ramos Nascimento (universidade federal do pará), wellington bruno silva de jesus (universidade federal do pará), Deibson Silva da Costa (universidade federal do pará), Luiz Gabriel da Silva Nascimento (Instituto Federal de Educação, Ciência e Tecnologia do Pará)
Abstract:
The study of this work was directed to the unidirectional solidification of the Al-9%Ni alloy using a device in which its internal camera does not allow the existence of temperature gradient in a direction other than the direction of solidification. After the melting and solidification, process samples of random positions along the ingot were collected to perform the metallographic, mechanical and optical microscopy and scanning procedures. The macrostructure was predominantly vertical columnar, and the microstructure was dendritic in the regions closest to the heat extraction, with its smaller spacing, which influenced the increase in hardness. It is also observed by scanning electron microscopy the presence of a large amount of Al3Ni fibers, which also contributed to the increase of the resistance of the alloy.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): getúlio fonseca dos santos (IBAR), GILBERTO FERNANDES LIMA (UEMG), LEONARDO NEVES (CEFET/MG)
Abstract:
Secondary refining is a process where the homogenization of steel and flows of inclusions occur in the metallic bath, which knowledge of the time of mixture is necessary in the production of clean steels. The ladle, the main vessel where the procedure occurs, contains inert plugs or injection nozzles, argonium or nitrogen, which are responsible for the steel rinsing. Due to the importance of this stage in this process, this work has obtained the study of the two-phase steel flow with two different configurations, the configuration one with two inert gas plugs: both of the ray and the configuration two with two gas plugs inertial, one midday, and others in the center of the ladle. Computational fluidodynamics, cfd, for the production of simulations that provided tracer curves and the speed profile for both the configurations were used in this project. The simulated results indicate that the two configuration is the most indicated for two-phase discharge, being the best option to be used in the industrial ladle model..
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): RAPHAEL MARIANO DE SOUZA (INSTITUTO FEDERAL DO ESPÍRITO SANTO), CAIO VACCARI SILVA (INSTITUTO FEDERAL DO ESPÍRITO SANTO), VICTOR BRIDI TELLES (INSTITUTO FEDERAL DO ESPÍRITO SANTO), ANDRÉ OLIVEIRA GALON (INSTITUTO FEDERAL DO ESPÍRITO SANTO), FELIPE FARDIN GRILLO (INSTITUTO FEDERAL DO ESPÍRITO SANTO), JOSÉ ROBERTO DE OLIVEIRA (INSTITUTO FEDERAL DO ESPÍRITO SANTO)
Abstract:
This work aimed to study the influence of the CaO granulometry added to the process of dephosphorization, temperature and FeO content in the agglomeration of solid particles in the slag. For this, laboratory tests were carried out in seven different experimental conditions, as well as the analysis of images by software Quantikov, to measure the agglomeration, besides computational thermodynamic analysis. The granulometry, temperature and percentage of FeO were shown to be relevant parameters in the agglomeration of the dephosphorization slag and the image analysis proved to be a useful tool to obtain these resultS.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): aTHOS fernandes araujo (UFMG), Wallace Crisólogo Souza Gonçalves (saint gobain), Gustavo henrique sousa (ufmg), loyslene rabelo fernandes (ufmg), roney eduardo lino (arcelormittal)
Abstract:
In iron refining processes, ferroalloys play a very important role. And it is necessary to know the behavior of the performance of these alloys so that unnecessary additions are not made that can raise the costs of production or even entail in losses of races by chemical composition outside the specification range. In this work the secondary refining simulator of the Steel University was used to evaluate the performance behavior of the main ferroalloys in a rinsing station with a metallic bath deoxidized to aluminum and in a non-deoxidized bath. It was possible to evaluate that the yield behavior of the ferroalloys tends to be more positive when the metal bath deoxidation is done using Aluminium. This made a comparative of the cost of production that showed that, when one knows the behavior of the yields, it is possible to generate savings for the process.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): Clarissa Barros da Cruz (unicamp), andré dos santos barros (unicamp), rafael kakitani (unicamp), Thiago Soares Lima (unicamp), amauri garcia (unicamp), noé cheung (unicamp)
Abstract:
Thermal interface materials (TIMs) are responsible for the thermal exchange between the heat source of the integrated processor and the heatsink base. Due to their low melting point, good fluidity and compliance with regulatory requirements (Restriction of Hazardous Substances - RoHS), bismuth-based alloys have been investigated for application as high performance TIMs. In this context, the analysis of the properties of these alloys as functions of microstructural parameters becomes, therefore, of high scientific and technological interest for the electronic industry. Thus, this work aims to develop correlations between tensile properties and the microstructure of the Bi-0.28wt.%Ni alloy processed by an upward directional solidification technique under a range of cooling rates usually obtained in industrial processes. By means of optical and scanning electron microscopy, a typical lamellar eutectic morphology was observed, composed of lamellae bismuth-rich with the Bi3Ni intermetallic phase in the interlamellar region. Then, the lamellar spacings (λL) were correlated with solidification thermal parameters to propose microstructural growth laws. Finally, it was observed that, for λL <101 μm, Hall-Petch type equations characterize the variation of both the ultimate tensile strength and the yield strength.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): ADRIANE PIMENTEL OLIVEIRA (Universidade federal do pará), ANDREA CRISTINA RODRIGUES DE SOUZA (UNIVERSIDADE FEDERAL DO PARÁ), Cecilia Corrêa Pereira (UNIVERSIDADE FEDERAL DO PARÁ), WILLAM RAYPLHAM PEREIRA COELHO (universidade federal do pará)
Abstract:
The present work has the objective of investigating and analyzing the river basin conceptions of a beach of Mosqueiro PA regarding the process of environmental degradation with emphasis on erosive processes. The subjects of the survey were 30 people living in the area close to degradation. A semi-structured interview containing six questions regarding the erosion process was used as a data collection instrument. It was observed in the responses of the interviewees that erosion affects both the livelihood of the riverine community itself and the fauna and flora, causing an environmental imbalance.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): PABLO ALTOE AMORIM (JAFENG / FAESA Centro Universitário), Arthur Pizetta David (FAESA Centro Universitário), Bruno Sellitti Borges (FAESA Centro Universitário), Matheus Diogo Penido da Silva (FAESA Centro Universitário), Otávio Lube dos Santos (FAESA Centro Universitá)
Abstract:
Automation is in everywhere nowadays, including within companies and industries, and is therefore fundamental and essential for production, quality and process control of them. There are many ways to automate a production line or a machine can be through relay logic, Programmable Logic Controllers (PLCs), and even more modern microcontrollers with native Internet of Things (IoT) support can be used. What are the advantages and disadvantages of each approach? A PCB was created using more modern microcontrollers programmed in C, C ++ and Whiting language to simulate a replacement of a PLC in an actual machine. Having a very positive result, being able to handle the machine manually via Wi fi besides being able to also perform a real-time monitoring of the machine's motors through the mobile phone, thus entering the IoT and fitting into the Industry 4.0.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): Vitor Martini (FAESA Centro universitário), Newton Valladão Junior (universidade de vila velha), Otávio Lube dos Santos (FAESA Centro universitário), Allan Cypriano Doelinger Assad (FAESA Centro universitário), pablo Altoé amorim (JAFENG / FAESA Centro universitário)
Abstract:
This paper aims to develop a device to measure mechanical stresses of structural parts of a Baja vehicle to estimate its instantaneous value with the use of: Strain gages; a hardware for data processing; an embedded system for data acquisition and manipulation; and a human-machine interface to analyze the results.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): NORTHON TOREZANI CAVAZZONI (ARCELORMITTAL BRASIL SA)
Abstract:
In an environment where data is becoming a valuable commodity, consequently the value comming from these becomes a fundamental tool for the evolution of any business. Aiming the value of this commodity, we started to fit the road’s weighing system of ArcelorMittal Tubarão into ArcelorMittal Vega’s process, providing an standard for weighings and data validations, reducing incidents caused by third-part systems in the weighing process and ensuring the organization of those data, with easy access for all users.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): PAULO ROBERTO CARREGOSA LUIZ (Instituto militar de engenharia)
Abstract:
Use of computers has growing so grandiose, because of this, the interest of the people to be more detail on this matter and seek information for their survival in the virtual environment has grown as well. Over time, these same people in which sought knowledge for their survival realize that to go further. Thereafter, try new experiences in virtual environments, making invasions in common users, or even of large companies. This work was done in order to create a culture of prevention to connect the Internet, guiding and preventing users from using computers safely and correctly. Demonstrating that the most common means of attack and how to avoid these types of attacks. It was established mechanisms, not to create a network 100% safe, but have ways of how to prevent and avoid these types of attacks.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): Alexandre RoDIZIO BENTO (UNICESUMAR), Maycon Douglas de Moraes (UNICESUMAR)
Abstract:
The globalized economy of the automotive sector requires greater optimization in logistics processes. To meet this demand the systemic application appears as an option to make the logistics process and its operations more flexible and to become a strategic department. These operations are related to the production chain, that is, from the raw material to the final customer. To do so, investing in disruptive technologies becomes essential to making gains and integrating the entire logistics process in the industry. In order to minimize possible risks with delays in the collection or delivery and meeting the expectations of the client, in addition to avoiding fines. In this way, the technology helps to monitor in real time all vehicle activities inside and outside the industry, combining as advantages to cure possible problems like delay and lack of raw material. Due to the need for deliveries at the date and time already stipulated, as they are related to the production planning of the automaker. If delay occurs in the collection already scheduled this can generate negative impacts and losses. To avoid these losses, it is necessary to invest in robust technology to improve the logistics process. In this scenario, the technology that evidences the loading process allows to optimize and flexible the logistics management in the automotive sector. This work demonstrates the substitution of the manual logistic process of the control of vehicle loading, by a system that evidences the process automatically. This replacement allows you to automate some logistics operations, reduce the time and operational costs between the various shipments made daily. The results of this new system allow to integrate the logistic process in real time, obtain operational gains, improve information management in less time with safety and reliability for the automotive sector.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): PAULO ROBERTO CARREGOSA LUIZ (Instituto militar de engenharia)
Abstract:
Authentication is the means to make sure that the user or the remote object is actually who you are claiming to be. It is an essential security service because reliable authentication ensures access control, determines who is authorized to access information, allows audit trails and ensures the legitimacy of access.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): OTAVIO DA FONSECA MARTINS GOMES (UFRJ)
Abstract:
The present work developed a solution, using Hadoop and Map Reduce for C (MR4C), able to parallelize the segmentation of cracks in mineral particles images. A set of 221 images with different sizes of copper ore particles obtained by SEM was used for the tests. The variation in the number of processing nodes presented a speedup that increased almost linearly. Static load balancing promoted a speedup of 1.3. The proposed solution, when compared to the sequential implementation, considering a cluster with 9 processing nodes, reached a speedup of 19.1.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): carlos mateus braga de almeida (Universidade federal do ceará)
Abstract:
Knowing the reduction of the concentration of iron in the mineral load extracted in the last decades and, therefore, greater need for comminution processes, there is no denying that iron ores tend to get increasingly thin for steelmakers. In Reactors such as Blast Furnace and others of fusion-reduction, where the reduction of the iron ore for the metallic iron for the steel production occurs, we observed that one of the alternatives is to agglomerate the raw materials in the form of briquettes, improving the kinetics of the chemical reactions, since ores in the form of fines impair factors such as the permeability required for reduction. These agglomerates are composed of a reducer, fines of ferrous materials and a binder material, and require, in addition to satisfactory Metallization, mechanical resistance, avoiding losses when the compound is fragmented during transport or during its deposition in the Steel Reactor. In the following work, Briquettes were produced with 65% Charcoal, 25% Pellet Feed, 6% Molasses Cane and 4% Hydrated Lime. After adjusting the granulometry of the coal to less than 170 ° and mixing the materials manually, the process of pressing the blends was started, this step being carried out under different pressure conditions (1.2 and 3 tons) and pressing time ( 20,60 and 100 seconds), aiming, through fall tests, to analyze the influence of these two variables on the mechanical resistance of the briquettes generated.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): PAULA MARIA GOMES CUNHA LEAO (universidade federal de ouro preto)
Abstract:
In the iron ore beneficiation, tailings are inherent in the concentration processes to which the ores are subjected for the production of commercial products. The large generation of tailings has been motivating the study of technological alternatives for its reuse, with the development of processes that contemplate the concentration of fine ore particles present in the tailings, such as the reintroduction of these particles in the process of manufacture of the iron and steel itself, through the agglomeration techniques such as briquetting. The aim of this article is to study the technical feasibility of the production of iron ore tailings and coking coal briquettes for use in reduction reactors, through a systematic review of the literature on agglomeration, briquetting and self-reduction processes, covering the main variables that influence the production of high quality briquettes, such as binders use, binder behavior of coking coal, coal granulometry, iron ore and coal proportion, compacting pressure and temperature of thermal treatment and the effects of these variables on briquettes final properties.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): RAYANDER MARTINS PIMENTA (Centro Federal de Educação Tecnológica Celso Suckow da Fonseca (CEFET/RJ) - cAMPUS Angra dos Reis), JÉSSICA VICENTE LUIZ (CENTRO FEDERAL DE EDUCAÇÃO TECNOLÓGICA CELSO SUCKOW DA FONSECA (CEFET/RJ) - CAMPUS ANGRA DOS REIS), EVERTON PEDROZA DOS SANTOS (CENTRO FEDERAL DE EDUCAÇÃO TECNOLÓGICA CELSO SUCKOW DA FONSECA (CEFET/RJ) - CAMPUS ANGRA DOS REIS)
Abstract:
The Hybrid Pelletized Sinter (HPS) is a agglomeration process that involves the combination of conventional sintering and pelletizing techniques and can be used with the purpose of obtaining improvements in the agglomeration stage of iron ore, and one of the great advantages of the process is the use of a wide particle size range of the ore. In this way, the superfines of low-cost ores, which are improper in sintering, can be used in the HPS process for the formation of the quasi-particle. The use of HPS with the sintering plants of the industries presented throughout the study, enabled an increase in productivity, decreased fuel utilization and reduced slag formation in blast furnaces. Thus, the present study aims to present a review of the literature on the Hybrid Pelletized Sinter (HPS) process and its main characteristics, as well as the results obtained by the companies that adopted the process.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): LORENA CRISTINA AMORIM MOURA (UNIVERSIDADE FEDERAL DE OURO PRETO)
Abstract:
In recent years, several studies have demonstrated the possibility of using small coke as a constituent of the blast furnace metal load, aiming at reducing the temperature of the thermal reserve zone and, consequently, the consumption of reducing agents. This work evaluates the technical feasibility, on laboratory scale, of the production of a small highly reactive coke through the dusting of 3% of 2 catalysts, pellet feed and virgin lime on its surface. Chemical characterization of the catalysts was carried out using X-ray fluorescence (FRX) and the impacts of these additions on CRI (Coke Reactivity Index) and CSR (Coke Strength after Reaction) of the produced samples were evaluated. The results showed increases of up to 2% in the reactivity of small coke, both for the addition of virgin lime and pellet feed, but more significant for the addition of virgin lime, proving that the technique of Post-addition of Boudouard reaction catalysts in small coke, can be an alternative for cost reduction and CO2 emissions in the blast furnace.
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): OTAVIO HENRIQUE MATOS DE ASSIS (UNIVERSIDADE FEDERAL DE MINAS GERAIS), Ismael vemdrame flores (UNIVERSIDADE FEDERAL DE MINAS GERAIS), Maurício covcevich bagatini (Universidade federal de Minas gerais)
Abstract:
To approach the phenomena of reduction retardation on the reduction rate of iron-bearing materials, which occurs at the beginning of the cohesive zone, complete and interrupted (at pre, 10 and 50% contraction temperatures) softening and melting tests were performed for two commonly used blast furnace burden: sinter and pellet. The interrupted tests’ products were physically characterized by its apparent and real density, and porosity (open, closed and total). It was observed that the reduction retardation occurred at lower temperatures and in a more prominent way for pellets in comparison to sinter. The results also showed an increase of open and total porosity during reduction until contraction levels reach 10%. At higher contraction levels (50%) a significant decrease in open porosity was observed for both samples
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): rodrigo ferreira santana da silva (Ternium Brasil ltda)
Abstract:
The Ternium Brasil Blast Furnace#2, in Rio de Janeiro, started to operate in 16 of December, 2010. In this campaign happened, cast iron stave displacement and deformation in copper staves called “banana effect”, generating the lost capacity of refrigeration of these cooling system components. The main objective to reduce the interruption in Blast Furnace#2 operation was established that must be replaced the damaged staves and shell sectors that presented cracks and deformations, consequently the lost mechanical properties. The staves exchange is a complex activity, that has many risks for the workers, as burns per hot water, pressurized hoses and others. To reduce these risks, the team of Ternium developed a design that informally called of “device 4 in 1”. This system is a header that reduce the exposition time of workers because reduce the handling time and avoid the workers of dangerous conditions. This paper presents the details about the utilization of this device in staves exchange .
Plenary
10/1/19, 3:40 PM - 10/1/19, 4:30 PM
Presenter(s): NATALIA ISABEL DE AZEVEDO LOPES (CIT SENAI FIEMG), Marco Aurélio Maia Teodoro (cit senai fiemg), Carolina das Graças Graciano Guimarães (anglo american), Túlio César Nogueira (cit senai fiemg), Elenice Cavichioli Borba (cit senai fiemg)
Abstract:
The characterization of lateritic ores is of extreme importance due to its mineral complexity and its effect on the production of nickel metallic and iron-nickel alloys. In this study, the behavior of a laterite nickel ore from the Barro Alto deposit during heating up to 1000°C in inert and reducing atmospheres was evaluated using thermogravimetric analysis and differential thermal analysis in conjunction with X-ray diffraction. In both inert and reducing atmosphere, the dehydroxylation of goethite and serpentines, and the decomposition of talc and clinochlore are observed. When the reducing atmosphere was used, the formation of magnetite and wustite, as a result of the reduction of hematite and magnetite, followed by the formation of metallic iron and iron-nickel alloy, is also observed.
Closing
10/1/19, 3:45 PM - 10/1/19, 4:00 PM
Presenter(s): DASSAULT SYSTEMES
Abstract:
Closing
10/1/19, 4:10 PM - 10/1/19, 4:25 PM
Presenter(s): TERNIUM
Abstract:
Technical visit
10/2/19, 2:00 AM - 10/2/19, 3:40 AM
Presenter(s): Coordinator:Vânia Lúcia de Lima Andrade – Consultant;
Abstract:
Panels
10/2/19, 4:30 AM - 10/2/19, 6:30 AM
Presenter(s): Coordinators: Francisco Coutinho Dornelas – Consultant and director of ABM’s Espirito Santo regional unit Débora Oliveira – Director for corporate issues at Brazil Steel Institute
Abstract:
Plenary
10/2/19, 8:10 AM - 10/2/19, 8:35 AM
Presenter(s): leonardo semedo de mattos siqueira (vale s/a)
Abstract:
Abstract The Granulometric Ratio (RG) is one of the most important indicators related to the pelletizing product. Through it, it guarantees good permeability of the bed of pellets, optimization of the thermal cycle and, thus, better results of physical quality and consumption of the energy matrix. To guarantee this indicator, it is necessary that the processes of agglomeration of pellets, classification of raw pellets and screening of burned pellets are under control of certain parameters and with a level of stability assured
Plenary
10/2/19, 8:35 AM - 10/2/19, 9:00 AM
Presenter(s): Victor Eric de Souza Moreira (REDEMAT), Dimas Henrique Barros Andrade (CSP), Jorge Luiz Baeta (JG Lobo Consultoria), Henrique Guilherme Lucas Bastos (GERDAU), Ana Karolina Menezes de Almeida (UFOP), Paulo Santos Assis (REDEMAT/UFOP)
Abstract:
The blast furnace is a metallurgical reactor which main product is pig iron. Adjusted operational practices, such as the injection of coal and natural gas, allow to decrease the coke consumption, increase the productivity and reduce costs. The flame oxidation potential is an important parameter in the practice of injecting of these, referred to Oxygen Excess Index (OEI). The formula was developed to determine the OEI for a blast furnace with injection of coal and natural gas. The analysis showed that, on average, the OEI and its standard deviation for periods with only coal injection was higher than in periods with co-injection of coal and natural gas. The optimization of the OEI value can successfully be an alternative for blast furnace performance improvement.
Plenary
10/2/19, 8:35 AM - 10/2/19, 9:00 AM
Presenter(s): joeli cuzzuol (aRCELORMITTAL TUBARÃO), Marco Aurélio Perim (ARCELORMITTAL TUBARÃO), Gustavo Mello (SSI Soluções Integradas), Arthur Quintão de Andrade (SSI Soluções Integradas), Eduardo Kuhl (ARCELORMITTAL VEGA), Maritha Andrade (SSI Soluções Integradas)
Abstract:
This article presents the results of the use of process simulation for the analysis of alternatives in decision-making management involving cabotage logistics (VESSELS and barges) for transporting coils between two of the ArcelorMittal units (Tubarão and Vega), in addition to the road logistics for storing and supplying coils in the Vega production unit. The study began with the mapping of processes and production flows to identify the initial and final limits for representation in the solution. An evaluation of the loading and unloading of vessels, return of vessels, process of loading of trucks, unloading and storage of coils in warehouses, in addition to the supply of coils for production in the unit of Vega. The study made it possible to evaluate the productive capacity of the system, the sizing of the resources involved (VESSELS, barges, truck fleets, capacity required for external storage), process bottlenecks, constraints and possible scenarios as an alternative to achieving the desired goals.
Plenary
10/2/19, 8:35 AM - 10/2/19, 9:00 AM
Presenter(s): tarley rezende secchin (arcelormittal tubarão), Danielle Duarte Bernardi (ARCELORMITTAL TUBARÃO), Ana Clara Bernabe (ARCELORMITTAL TUBARÃO), Jennifer Oliva Coronel (ARCELORMITTAL TUBARÃO), Wanderson Endlich (ARCELORMITTAL TUBARÃO), Gustavo Ludgero (ARCELORMITTAL)
Abstract:
ArcelorMittal Tubarão (AMT) has since the beginning of operation water resources as one of the central issues in the strategies of sustainability and operational stability for its production. AMT's water management, among other actions, ensures that 96,5% of all water used at the site comes from the sea. Furthermore, it has continuous investment in internal reuse, search for alternative water sources and fight against waste and leaks. The conduction of this water management contributed significantly to cross in 2015 the worst drought that the State of Espírito Santo State has crossed in the last 40 years. All these efforts resulted in a significant reduction in the volume of fresh water used in the AMT, reducing specific consumption from 4.2 m³ / t in 2014 to 2.5 m³ / t in 2018. As a result of a robust water management plan, a bold and innovative project, pioneer in Brazil and first of the group in the world will be held in the company, the sea water desalination plant. With investments of around R$ 50 million, the unit will begin to be built in 2019 and will be ready to use in 2 years. It will produce up to 500 m³/h of industrial water for water system, providing an important alternative source to the fresh water consumption
Plenary
10/2/19, 8:35 AM - 10/2/19, 9:00 AM
Presenter(s): alain de norman et d'audenhove (Belge engenharia)
Abstract:
Frequently, mills need to increase their productive capacity and often is hard to decide and be sure about the right investments for that. The discrete event process modeling technique fits this environment very well, allowing an accurate modeling that reflects the current situation of the plant. That model may verify the true bottlenecks for such expansion and avoid disastrous surprises in the investments made – idle new equipments or new unforeseen bottlenecks. Through a real project we have developed, this work will present some relevant aspects that should be properly addressed, such as: the variability of processes times and interruptions, the need to investigate the logistics of raw material supply and their preparation before foundry, and so one.
Plenary
10/2/19, 8:35 AM - 10/2/19, 9:00 AM
Presenter(s): matzael de souza (USIMINAS - IPATINGA)
Abstract:
Currently, Usiminas has directed efforts to develop repair methodologies of lining of the blast furnace, by combining automation of maintenance activities and use of high performance refractories. In this context, it is presented and discussed the technique of injection of refractory mass for repair of the lining of blast furnace, especially in the zones considered critical because of the premature wear of the lining and the overheating of the shell, due to anomalies in the refrigeration system. The developed methodology allowed to recover the lining by applying refractory mass of the Al2O3-SiC system, colloidal silica bonded, with the use of automatic pumping machines with high application rates. Since the implementation of this technique it was possible to minimize the risk of damages associated with the elevation of the shell temperature. This benefit reflected in increase of availability and operational safety of the blast furnaces of the Ipatinga industrial plant
Plenary
10/2/19, 8:35 AM - 10/2/19, 9:00 AM
Presenter(s): THUANY ESPIRITO SANTO DE LIMA (UNIVERSIDADE ESTADUAL NORTE FLUMINENSE), Valber Domingos Pinheiro (UNIVERSIDADE ESTADUAL NORTE FLUMINENSE), Jonas Alexandre (UNIVERSIDADE ESTADUAL NORTE FLUMINENSE), Afonso rangel garcez de azevedo (Universidade Federal fluminense), Markssuel teixeira marvila (UNIVERSIDADE ESTADUAL NORTE FLUMINENSE), euzébio Bernabé Zanelato (UNIVERSIDADE ESTADUAL NORTE FLUMINENSE), sérgio neves monteiro (instituto militar de engenharia)
Abstract:
The seating mortar serves to join the masonry units forming a monolithic assembly with structural function. It has the function of solidly joining the masonry units, uniformly distributing the active loads throughout the resistant area of the blocks, absorbing the natural deformations in which the masonry is subjected and sealing the joints against the penetration of air and water. It is required of mortars for characteristics of workability, water retention, cohesion in the plastic state, adhesion, and compressive strength. Considering the importance of the mortar in the system of structural masonry and that are the second largest component, behind only the blocks, this work aims to characterize three mortar traces of mixed type for use in structural masonry, according to technical standards Brazilians. The results showed the need to individually evaluate the compressive strengths of each mortar trace compared to the resistance of the block that will be used, and then make the choice of the most suitable trace for use in the work.
Plenary
10/2/19, 8:35 AM - 10/2/19, 9:00 AM
Presenter(s): luiz claudio von sperling cotta (vale), luiz claudio von sperling cotta (Vale sa), Artur Frederico Fonseca da Cruz (vale sa), Evandro José de Castro Lopes (vale sa), Gleison Vinicius Ricardo (Vale Sa), Talys Augusto Generoso Morais (Pontificia universidade catolica de minas gerais)
Abstract:
Binders are important raw materials in the iron ore pelletizing process. The bentonite, most usual, has been used in plants of this process since the forties due to its good performance in the agglomeration of ultrafine ore, although the silicon content in bentonite impairs the total iron content of the pellet, reducing its market value. This article studies the bentonite consumption reduction and improvement of the chemical quality of pellets by the addition of an organic binder in the productive process of Vale Vargem Grande pelletizing plant. By evaluation of variables as, drop test of green pellet, green pellet, dry pellet and fired pellet compressive strength tests, tumble index, percentage fraction of lower than 5 mm and total iron content in fired pellets, it was possible to approve the technical availability of the organic binder auxiliary in Vargem Grande pelletizing process. Nonetheless the positive influence of total iron content increase due to the reduction of bentonite consumption, it could also verify no impact on the physical quality of the pellets under the same production rhythm, approving once again the use of organic binders in pelletizing process.
Plenary
10/2/19, 8:35 AM - 10/2/19, 9:00 AM
Presenter(s): LuiZ GUSTAVO FRANCO AMARAL (ESSS - FLORIANOPOLIS)
Abstract:
This publication presents computational technologies to support the decision making of engineering projects aimed at the mining sector and has the objective of exploiting benefits obtained from the use of said current technologies in this industry.
Plenary
10/2/19, 8:35 AM - 10/2/19, 9:00 AM
Presenter(s): FLÁVIA VARGAS (nexa resources), Flávia Vargas (Nexa Resources), Thiago de oliveira nunan leite (nexa resources ), Homero Delboni Junior (USP)
Abstract:
Ball mill liners perform two main functions in grinding process: protect the mill shell from the aggressive milling environment and delivery input power to the charge. When it comes to liners optimization the challenge are to prolong the service life and improve grinding performance. Some liners characteristics such as A / B ratio, lifters number, lifter height, and attack angle are extremely relevant to grinding process. By analyzing process data, and through DEM simulations application, these parameters were improved on W-mill liner, located at Vazante concentration plant. The new profile promoted a reduction of power variability between the final and the initial life cicle intervals and, therefore, better stability to circuit operation. In addition, the new liner service life reached 21,603 hours, 25% higher compared to the previous one in use. This optimized profile therefore proved to be able to improve its functions by achieving superior process performance combined with longer service life.
Plenary
10/2/19, 8:35 AM - 10/2/19, 9:00 AM
Presenter(s): duan mateus dutra (csn mineração), leonardo torres dos santos (csn mineração)
Abstract:
The ore loading operation represents an important part of a miner's operating process. Because it is a key step, the unplanned downtime of the equipment is a major concern for managers. This research has as main objective to analyze the Tire Maintenance process, verifying the operational costs related to the process, as well as to increase operational safety avoiding accidents. During the work, deviations were identified in the operational and maintenance process in which the related areas were involved, but the results were not significant. Given this, it was necessary to develop a new component to support the efforts during the operation.
Plenary
10/2/19, 8:35 AM - 10/2/19, 9:00 AM
Presenter(s): SERGIO CORDERO CALVIMONTES (Universidade federal do rio de janeiro), Rafaella Martins Ribeiro (universidade federal do rio de janeiro), Antônio José Oliveira Cabral (Universidade Federal Fluminense)
Abstract:
Using a generalizing method applied on consumable-electrode fusion welding processes, based on a technological disaggregation, a computerized mathematical model is applied to study the temperature profile behavior on the different specific configurations of each process, in order to infer the deposition rate and material compensation velocity. A potentially significant method is generated to be used in practical applications.
Plenary
10/2/19, 8:35 AM - 10/2/19, 9:00 AM
Presenter(s): BRUNO DOUGLAS RODRIGUES BARBOSA (UFC CAMPUS DO PICI BL 714)
Abstract:
HR Rounds
10/2/19, 8:35 AM - 10/2/19, 10:15 AM
Presenter(s): -Danieli; -Paul Wurth; -PSI; -SMS; -White Martins;
Abstract:
Plenary
10/2/19, 9:00 AM - 10/2/19, 9:25 AM
Presenter(s): mARIA SOLEDAD OREGGIONI (INSTITUTO ARGENTINO DE SIDERURGIA), Santiago margot (ternium argentina), roberto musante (ternium argentina), pedro etchevarne (TERNIUM ARGENTINA), oscar baglivo (instituto argentino de siderurgia), daniel costoya (instituto argentino de siderurgia)
Abstract:
During 2017 Ternium Argentina BF#2 operation required changes in binary slag basicity in a wide range between 2.0 to 2.7 and in the MgO content. This working range motivated the study of the metallurgical properties of sinter and its interaction with other components of blast furnace iron burden materials. Also, it was tested and analized the influence of two different lump ore qualities. In order to understand the effects of chemical composition, a set of reduction-desintegration tests were designed, with isothermal profiles (ISO 4696-1) and variable temperature and gas composition profiles. Properties at high temperature were also evaluated through softening-melting point tests, over sinter, pellet and lump ore mixtures, using sinter samples of different basicity and MgO content. Test results and their influence on the blast furnace behavior are analyzed in the present paper.
Plenary
10/2/19, 9:00 AM - 10/2/19, 9:25 AM
Presenter(s): iVANI BAtista dos santos junior (csn - companhia SIDERÚRGICA NACIONAL), ALEXANDRE JOSE RAMOS VALENTIM (csn - companhia SIDERÚRGICA nacional), VALERIA DA SILVA GUANDELINI (CSN - COMPANHIA SIDERÚRGICA NACIONAL), JOSELITO GONCALVES DOS SANTOS (CSN - COMPANHIA SIDERÚRGICA NACIONAL), DANIEL ROCHA DE CASTRO (CSN - COMPANHIA SIDERÚRGICA NACIONAL)
Abstract:
This article aims to demonstrate the gains obtained with automation of manual activities of medium complexity analysis and moderate execution time. To achieve this goal, without high investments, automations were developed through programming in Visual Basic (VBA) and SAP Scripts, using Microsoft Excel as a platform. The integration of Excel with SAP has proved itself effective, enabling tasks to be performed in a mass automated way, reducing the total execution time of the activities and leveraging the overall performance of the performing party
Plenary
10/2/19, 9:00 AM - 10/2/19, 9:25 AM
Presenter(s): Emerson lamartine ferreira (Ternium)
Abstract:
After the water scarcity of 2014, the National Water Agency of Brazil (ANA), aiming to preserve the water stocks of reservoirs of the Paraíba do Sul basin, authorized, in March 2015, a reduction of 190 to 110 m³/h in the flow of the São Francisco Canal. The change caused the aggravation of the effects of intrusion of the salt wedge of Sepetiba Bay in the said channel, increasing the conductivity values, which impacted the operations of the steel complex of Ternium, because the seawater came to enter in the raw water harvesting systems. With the objective of circumventing the problem, the company decided to implement a reverse osmosis plant in order to adapt the industrial water conductivity to the parameters of the technical specifications of the demineralized water plant. The present work describes the optimization of the said plant to the production of demineralized water, which also resulted in the reduction of the number of regenerations of the ion exchange resins, the consumption of chemical products, as well as the reuse of the saline reject generated in the process of Osmosis (Reuse Project).
Plenary
10/2/19, 9:00 AM - 10/2/19, 9:25 AM
Presenter(s): ludmila vieira da silva matos (spraying systems do brasil)
Abstract:
The present article features an investigation of how the cooling operational condition in a new continuous slab caster machine contributes to the air mist lances performance. The research was carried out at Spraying Systems Laboratory, in São Bernardo do Campo/SP, Brazil. The design of the new continuous slab caster machine had some premises for the new air mist nozzles, such as: lower consumption of compressed air, wide flow rate turndown and coverage quality throughout the air mist lance operational curve. Performance curves were set up for different compressed air pressure conditions: 1.5 to 4.5 bar. With the images in hand, it was possible to select those conditions of water flow and compressed air pressure with better jet profiles and coverage. As a result, the machine manufacturer can validate and / or modify the machine cooling working curve and ensure the best conditions for uniform cooling.
Plenary
10/2/19, 9:00 AM - 10/2/19, 9:25 AM
Presenter(s): CAIO VACCARI SILVA (IFES), José roberto de oliveira (IFES), Victor Bridi Telles (IFES), Anna Paula Littig Berger (IFES)
Abstract:
In the present work, an analysis of the dephosphorizing efficiency of a standard mixture M1 and other three mixtures with increasing percentage of FeO (5%, 10% and 15%) were proposed. Experimental tests were carried out at a temperature of 1400°C, with constant agitation of 450 RPM in a resistance heated furnace. Simulations were also performed through computational thermodynamics software FactSage 7.2 and analyzes of images of the surface of the crucible obtained at the end of the experiments were analyzed through the software Quantikov. The mixture M1 yield better efficiency than the other with the increased amount of FeO, since it was observed that as the %FeO in the mixtures increases, the dephosphorization efficiency decreases. These results corroborate the equation use to calculate the Fator de desfosforação (FDeP), calculated to correlate slags thermodynamical properties and dephosphorization efficiency.
Plenary
10/2/19, 9:00 AM - 10/2/19, 9:25 AM
Presenter(s): ROBERTO ABREU ALENCAR (CSP), dimas henrique barros andrade (CSP)
Abstract:
The blowpipe is an important part of the hot blast system of a blast furnace, where it directs the blast and injected fuels to the blast furnace, therefore inside of the furnace. It consists of a metal shell filled with refractory castable with heat resistance and a layer of thermal insulation between the refractory and the casing. Failures while in operation, the blowpipes usually generate great material damages, financial and great risk for the life of the operators, so the control and inspection of the structural and thermal integrity of the blowpipe is of great importance. Inspection in the blowpipe is performed in order to detect early hot spots that are indicative of structural failures in the blowpipe. Therefore, a numerical model of heat transfer was made, in order to analyze the conditions of the blowpipe to verify if, in normal conditions of operation, it maintains the thermal acceptance. The model showed satisfactory results, so when compared with the results of inspections on operating parts was obtained an error of about 8%
Plenary
10/2/19, 9:00 AM - 10/2/19, 9:25 AM
Presenter(s): MARIA JOSE SANTOS LIMA (universidade federal do rio grande do norte )
Abstract:
In this paper tantalum and niobium precursors were synthesized from the mixture of their commercially available oxides with potassium bisulfate and reaction with oxalic acid and ammonium oxalate. The powders were characterized on XRD, SEM, TG/DTG and DSC basis. XRD data indicated the partial crystallization of the precursors, as lightly amorphous characteristics were identified such as peaks less intense than the corresponding commercial oxides. SEM analysis indicated the presence of an agglomerated and slightly porous material of various shapes. The presence of pores is responsible for an increased surface area of precursors which allows a more intense contact of gas and solid phases during carbide synthesis. This thus makes possible a more efficient carbide synthesis as lower temperatures and times are required in comparison to the traditional method. Thermal stability of precursors were confirmed by TG/DTG analysis. XRD analysis of the produced carbides confirmed the synthesis of NbC and TaC and the viability of using the synthesis method proposed for obtaining pure carbides in nano scale at lower temperatures (1000°C) and shorter reaction times (60min)
Plenary
10/2/19, 9:00 AM - 10/2/19, 9:25 AM
Presenter(s): adrian villanueva (BASF SE), Shane hoff (basf corporation), abhay kulkarni (BASF INdia limited), stefan stein (basf se), jorge davo (basf s.a.)
Abstract:
Pellet sizing plays a key role in the productivity of the entire pelletization and subsequent induration processes, whereas uneven pellet sizing can increase the circulating load of the balling circuit inducing operational instability leading to production loses. The present work focuses in comparing the agglomeration kinetics, expressed as the number of pellets produced in a determined target size range, of different organic binder-bentonite binder systems. The batch experimental results show that the binder system has a great influence in the resulting pellet sizing, which could lead to advantages in terms of balling circuit efficiency and eventually operational de-bottlenecking.
Plenary
10/2/19, 9:00 AM - 10/2/19, 9:25 AM
Presenter(s): Aaron Young (University of utah)
Abstract:
This conference paper reviews the possible solutions that internet of things (IoT) could bring to Brazilian tailings dams. This is done through a qualitative review of available literature and state of the art technologies. While sensor technologies have existed as solutions for tailings dams for many years, IoT greatly reduces the cost of deploying, monitoring, maintaining, and gaining insight from these sensors. Additionally, IoT removes the need for manual data collection from sensors, enabling the monitoring of tailings dams from miles away and the use of new sensor technologies.
Plenary
10/2/19, 9:00 AM - 10/2/19, 9:25 AM
Presenter(s): Armando Fernandes da Veiga Rodrigues (VALE), Selmir Sebastião Magalhães Silva (VALE), Tatiane Aparecida Rocha Gonçalves (VALE), Neymayer Pereira Lima (VALE), Klaydison Carlaile SIlva (VALE)
Abstract:
The performance of a grinding circuit has been assessed with two industrial tests performed in the Timbopeba mill. The results demonstrated the influence of the classification phase on the final product in a grinding circuit and showed how the classification inefficiency can interfere in aspects such as the mill energy efficiency and the mass recovery of the plant, through the excessive generation of the ultrafines particles.
Plenary
10/2/19, 9:00 AM - 10/2/19, 9:25 AM
Presenter(s): PABLO ALTOE AMORIM (JAFENG / FAESA centro universitário), Matheus Rhein Martins (VALE / FAESA centro universitário), Devanir Silva (VALE)
Abstract:
Responsible for the removal of material from the train wagons and accommodation on conveyors belts, the Rotary Car Dumper is an essential equipment for handling bulk materials, and its stop by failure or even scheduled maintenance generates production losses. This paper proposes an improvement in the maintenance process of trunnions, responsible for dumper support, through structural modifications, in order to reduce the current 10 hours of production downtime to replacement the equalizing wheels. To this end, the proposed structure was modeled and characterized in SolidWorks software, and simulated using the Finite Element Method. Static and fatigue tests were performed according to the European Federation of Maintenance. Simulation results indicate that the change is feasible technically meeting the safety standards required by the FEM and its installation will not affect useful life of the system.
Plenary
10/2/19, 9:00 AM - 10/2/19, 9:25 AM
Presenter(s): GUILHERME RIBEIRO DE SÁ (UNIVERSIDADE FEDERAL FLUMINENSE)
Abstract:
This paperwork has as the main goal the achievement of a mathematical model for flash butt welding process using dual phase steel as material (DP600) in order to obtain the thermal cicle of different spots along the welded joint. The model was obtained by explicit finite-difference method in a matlab code.
Plenary
10/2/19, 9:00 AM - 10/2/19, 9:25 AM
Presenter(s): Gustavo Henrique Sousa (UFMG), Guilherme Vitor de Araújo (UEMG), Geziane Correa da Silva (UEMG), Hydia Thaisa Camargos Fonseca (UEMG), Lídia Fernanda Silva Pereira (UEMG), Athos Fernandes Araujo (UFMG)
Abstract:
This paper studies the corrosion resistance of SAE 1080 steel, which is used in the manufacture of parts for the automotive industry. The steel was immersed in water and sulfuric acid solutions with concentrations of 1.5 M and 3 M during the period of 50 days at room temperature. To evaluate the effect of corrosion and its influence on the mechanical strength of SAE 1080 steel, the calculation of mass loss and tensile tests was performed. Greater mass loss was observed in samples immersed in 3 M concentrations of sulfuric acid, as well as a decrease of 202MPa in tensile strength. The sample immersed in water showed no significant corrosion.
Plenary
10/2/19, 9:00 AM - 10/2/19, 9:25 AM
Presenter(s): rauni coelho da costa (universidade do estado do rio de janeiro)
Abstract:
SAXS technique is an analytical method that allows the determination of several properties in nanomaterials, and the collimator is the most important part of the optics this type of equipment, and its manufacturing is a challenge. 3D and 2D CAD software were used in the development and manufacture of a collimation block and comparative tests were performed using X-ray sources. Tests showed that the geometry of the collimated beam is consistent with the previously resolved geometric models.
Forum
10/2/19, 9:00 AM - 10/2/19, 9:50 AM
Presenter(s): Koji Saito – Executive advisor with Nippon Steel Corporation
Abstract:
Plenary
10/2/19, 9:25 AM - 10/2/19, 9:50 AM
Presenter(s): VALERIA DA SILVA GUANDELINI (COMPANHIA SIDERURGICA NACIONAL), Fausto Kunioshi (COMPANHIA SIDERURGICA NACIONAL), Alexandre José Ramos Valentim (COMPANHIA SIDERURGICA NACIONAL)
Abstract:
In an increasingly competitive marketplace, ensuring quality services in more productive and lower-cost environments are key values for increasing the efficiency of organizations. Based on the Shared Service Center management model, the Supply area of the Companhia Siderúrgica Nacional created the BackOffice, as one of the ways to focus on core business and makes these values sustainable. This article aims to present the methodology used to plan, implement and improve the area and share the gains in quality, performance and costs with the reorganization and standardization of processes that were fragmented and being executed in different departments.
Plenary
10/2/19, 9:25 AM - 10/2/19, 9:50 AM
Presenter(s): Caio trindade de almeida (white martins gases industriais ltda), Tharcysio de Oliveira Rocha de Paiva (White Martins Gases Industriais Ltda.)
Abstract:
The cooling and purification stage is of great importance for the air process separation, since it is at this stage that the main contaminants (water, hydrocarbons and CO2) are removed. If not controlled, these contaminants can cause problems to the process like obstruction and release of energy. In this paper, a case study is presented for an air separation plant with CO2 breakthrough at the end of the pre-purifying vessel operation cycles (VPPs). The solution obtained was the installation of a chiller of refrigeration that promotes the reduction of the temperature of the water that cools the air by the exchange of heat by direct contact. As expected, the chiller provided a reduction in air temperature which resulted in better performance of VPPs, increasing process reliability and increasing operational safety by controlling contaminants.
Plenary
10/2/19, 9:25 AM - 10/2/19, 9:50 AM
Presenter(s): rafael fernandes reis (usiminas), leonardo jose silva de oliveira (usiminas), rodrigo seara martins (usiminas)
Abstract:
Changes in crystallization of mould fluxes during the continuous casting process, caused by chemical compositions variations due metallurgical reactions at metal/slag interface or by absorption of exogenous compounds, affect the heat flux in the mould. The ZrO2 is one of this important components provided to the slag by the submerged entry nozzle wear. The results obtained show that when the ZrO2 content increase the heat flow in the meniscus region it also raise. This effect is important for defects formation mechanism, since the meniscus region is crucial for initial solidification of the steel.
Plenary
10/2/19, 9:25 AM - 10/2/19, 9:50 AM
Presenter(s): DEBORA CARDOSO DE OLIVEIRA SILVEIRA (universidade federal de Minas Gerais), Hamzeh Hamadeh (ArcelorMittal Global R&D Maizières), Kateryna Pastel (ARCELORMITTAL GLOBAL R&D MAIZIÈRES), Jean-Christophe Huber (ARCELORMITTAL GLOBAL R&D MAIZIÈRES), Guillaume Brosse (ARCELORMITTAL GLOBAL R&D MAIZIÈRES)
Abstract:
The dynamic behavior of oxygen gas flow, determined by the lance nozzle and blow pattern, is a key factor for determining jet efficiency in BOF Steelmaking. The present work compares the performances of Laval and parabolic nozzles with the aid of the Computational Fluid Dynamics (CFD). The Method of Characteristics (MOC) was applied to design a minimum length parabolic nozzle. The results show that the parabolic nozzle generates more uniform and stable jet, with 2% longer potential core and supersonic length and less shock waves. For the parabolic nozzle, the pressure nearby the nozzle wall is higher, which can protect this region from reverse flow of converter gases and offer longer life for the lance tip. Likewise, the flow rate variations would affect less this nozzle. In addition, the nozzle wear was investigated, and the parabolic nozzle has proven relatively less sensitivity to the presence of this deformity.
Plenary
10/2/19, 9:25 AM - 10/2/19, 9:50 AM
Presenter(s): EDGAR APAZA HUALLPA (UNSA-PERU)
Abstract:
In the following work impregnated on sillar (ignimbrite) photocatalytic coatings based on TiO2 obtained by sol-gel. Soles of TiO2 were prepared with or without surfactant using titanate isopropoxide (TTIP) as a source of Ti and Brij58 as a porosity agent. The ignimbrites have been coated / impregnated by immersion using the different types of suns and controlling the relative humidity at 20%. The samples have been sintered at 450 ° C / 1 hour in air. Cores were coated on the glass slide that were characterized by optical microscopy and spectral ellipsometry to determine the diffraction index n and the thickness.
Plenary
10/2/19, 9:25 AM - 10/2/19, 9:50 AM
Presenter(s): Tulio Moreira Campos (Universidade federal do rio de janeiro), Gilvandro bueno (vale s.a), Luís marcelo marques tavares (universidade federal do rio de janeiro)
Abstract:
The HPGR development and application in the minerals industry resulted in an important increase in its application in iron ore pellet feed processing in the last decades. Vale SA was one of the pioneers in application of the HPGR in integrated plants, currently operating with six HPGRs in the pelletizing plants of Complexo de Tubarão (Vitória, ES). The work uses the mathematical model of the HPGR, proposed by Torres & Casali and modified by the present authors, to predict the performance of two industrial pellet feed HPGR units of the Complexo de Tubarão. Besides model validation, results of process simulations are shown in order to optimize the pellet feed pressing according to industrial demands, presenting different scenarios that are more attractive to HPGR operation. Simulations showed that it is feasible to reduce the specific surface area of the HPGR feed from 1770 cm²/g to 1570 cm²/g, allowing to produce a pellet feed of the same quality in its product (1911 cm²/g) and therefore reduce the work done by upstream ball milling.
Plenary
10/2/19, 9:25 AM - 10/2/19, 9:50 AM
Presenter(s): ariane kuerten (anglo-american), Paulo ricardo nunes da conceição (ufrgs), carlos hoffmann sampaio (UPC), carlos otávio petter (ufrgs), eunírio zanetti fernandes (itv)
Abstract:
The Sensor Based-Sorting technology is an emerging technology applied in mineral separation and concentration. The technique consists in using a method known as Dual Energy X-ray Transmission sorting (DE-XRT). The particle's position over the conveyor belt was evaluated and, despite de variability of results, shows that there is no a position with greater accuracy on the sensor's reading. Results obtained indicated that DE-XRT sorting technology was able to significantly reduce the mass and the ash content of the feed, being an interesting option for reduction of costs and improvement of coal quality in beneficiation plants.
Plenary
10/2/19, 9:25 AM - 10/2/19, 9:50 AM
Presenter(s): Walter valery (hatch), kristy duffy (hatch), peter holtham (hatch), alex jankovic (hatch), sergio vianna (hatch), erico tabosa (hatch), rodrigo hayashida (hatch)
Abstract:
Hatch’s Mine to Process Optimization projects integrate mining and processing strategies, minimizing operating costs and maximizing overall profit. The methodology involves ore characterization, blast audits, plant surveys, analysis of historical data, and integrated modelling and simulation of mining and processing. Blast designs are tailored according to ore type and the downstream process is optimized for the changed feed. This approach has increased throughput and minimized costs for many operations worldwide. The implementation of this methodology at an iron ore operation that faced challenges with increasing mining strip ratio and ore body mineralogy changes is presented in this paper. The larger stripping ratio increased mining costs and constrained the run-of-mine (ROM) delivery to the process plant. Process performance was affected as the ore mineralogy shifted from predominantly hematite to include greater proportions of magnetite. The project objective was to minimise overall cost per ton mined and processed and maximise profit. Tailoring the blast designs according to ore type and process optimization increased the throughput of all process lines. This provided the potential to shut down one of the five processing line, aligning the mine and plant capacity and significantly reducing the processing costs
Plenary
10/2/19, 9:25 AM - 10/2/19, 9:50 AM
Presenter(s): BRENO CARVALHO DE OLIVEIRA (FERROVIA CENTRO-ATLANTICA S.A), Clayton Guimarães de almeida (FERROVIA CENTRO-ATLANTICA S.A), Breno Delgado Silva (FERROVIA CENTRO-ATLANTICA S.A), EDUARDO GONTIJO CARRANO (UFMG)
Abstract:
In this work the development of a methodology for the multiobjective analysis applied to the strategic planning of the intervention of sulfur wagons is presented. The test unit is composed of 400 HPE wagons owned by the company VLI Logística SA, which have been deteriorated by the high level of corrosion of the transported product. In this way, its objectives are to minimize recovery costs and risks for a 10-year planning horizon. The problem was modeled through integer linear programming and an algorithm was implemented to deal with the problem using the ε-Restricted approach, in order to obtain the Pareto optimal solutions and later decision making. Finally, through a previous simulation and selection of a conservative solution, the result was a 20% reduction in costs for the 10-year budget cycle. Showing the methodology's efficiency
Plenary
10/2/19, 9:25 AM - 10/2/19, 9:50 AM
Presenter(s): carlos algredo gracioli aita (instituto federal de santa catarina), TONILSON DE SOUZA ROSENDO (UNIVERSIDADE FEDERAL DO PAMPA), Marco Antônio Durlo Tier (UNIVERSIDADE FEDERAL DO PAMPA)
Abstract:
Response surface modeling can be used to predict mechanical phenomena in joints welded by process friction stir spot welding (FSSW). The use of techniques, such as, regression analysis led us to collect results at intervals not studied with great reliability with assistance of empirical mathematical models. The FSSW welding process consists in a rotational tool, which plunges onto sheets in overlapping joint configuration, executing the welding. The objective of this work is to find an equation that describes the welding process, within the range of parameters studied, with regression coefficient greater than 90%. In this work, full factorial (3²) was used to study the range of parameters selected. The joints were welded and subjected to shear tests. The data were treated and submitted to empirical mathematical methods to search a regression equation. It was possible to find regression coefficients with more than 95% showing a good fit of the curve
Plenary
10/2/19, 9:25 AM - 10/2/19, 9:50 AM
Presenter(s): Amanda de paiva silva (ufop)
Abstract:
Weathering steels are low carbon steels utilized in structures in general, that, due to the addition of alloying elements such as Cu, Cr, Si and P, develop an oxide protective layer during their contact with the atmosphere, resulting in excellent atmospheric corrosion resistance. This process is relatively complex and is related to the presence of a thin electrolyte film on the surface of the metal. Sulfur and nitrogen oxides are the primary responsible for the industrial corrosion, while maritime environments are characterized by high relative humidity and presence of sodium chloride, being the corrosion caused mainly by the presence of chloride ions. In this way, cyclic corrosion tests were developed with subsequent characterization of the oxide layer through electrochemical impedance spectroscopy, in order to evaluate the atmospheric corrosion behavior of two steels, considering marine and industrial atmospheres. It was observed that the steel containing higher Si content had better performance in marine atmosphere, while in the industrial atmosphere the behavior of the two steels was similar.
Plenary
10/2/19, 9:25 AM - 10/2/19, 9:50 AM
Presenter(s): vitor tomaz de aquino (csn), Moysés Dutra da Silva (csn), RAFAEL MASULCK SANTOS (CSN), Tiago Araújo Neves (UFF), Weslley Luiz da Silva Assis (UFF)
Abstract:
This paper addresses the multiple knapsack problem to model the allocation of steel coils into inner covers of annealing furnace process on metallurgical industries. Special process conditions require prioritization of the oldest coils to ensure quality requirements. Moreover, some physical limitations, such as height and weight, and quality requirements, like the obligation to group together coils of the same quality, must be observed. Thus, a mathematical formulation is proposed to solve this problem, whose objective function aims to maximize the total weight of the load and prioritizes the oldest coils in stock. The computational results show that the application of linear programming model technique optimizes the formation of loads in real case scenarios.
Plenary
10/2/19, 9:50 AM - 10/2/19, 10:15 AM
Presenter(s): EDNEY DA SILVA DIAS (ARCELORMITTAL VEGA)
Abstract:
The objective of this work is to present a project developed to maximize the occupancy rate of the vehicles that load at ArcelorMittal Vega, through the use of linear programming combined with robotic process automation (RPA) methods, in order to meet all assumptions of the cargo shipment model, such as: customer restrictions, maximum capacity per type of vehicle and distribution of volumes to carriers according to logistic planning. The use of optimization and automation tools, integrated with the ERP (Integrated Management System), used by the company, allows the mass transport scheduling process to be performed, obeying multiple criteria. The lack of tools that assist in this process, directly impacts the productivity, absorbs all the intellectual capacity of the human resources, the profitability of the conveyor, the capacity of shipment of the plant and the customer service level. In order to increase efficiency in the processes, improve the capacity utilization rate of the vehicles and consequently the capacity of shipment, the solution was implemented to improve the process of scheduling loads and to add value to the business in terms of delivery to the final customer
Plenary
10/2/19, 9:50 AM - 10/2/19, 10:15 AM
Presenter(s): Matheus Neves Lana (Ternium Brasil)
Abstract:
The environmental regulation of industrial processes that generate fluoride-containing effluents is globally restricted due to the high toxicity of the ion. At Ternium, recirculated cooling water in the Continuous Casting Spray (WTP # 2) dissolves part of the flowing powder, resulting in concentrations of 20 to 30 mg / L of fluoride. For the development of the fluoride treatment process that complied with the legislation, keeping in the effluent treated Fluoride concentration less than 10mg / L and Aluminum less than 3.0mg / L, a research was carried out using a conventional Jar Test equipment totaling 165 tests. The trials were planned according to literature reviews describing the method of chemical precipitation of calcium fluoride, aided by Aluminum Cations. At the conclusion of the research, a Technological Route was developed to treat the effluent generated in the purge of the WTP # 2 system fulfilling the legislation, reaching a removal of 70% to 80% of Fluoride. At the end, a dosage optimization step was carried out, which resulted in a reduction in the number of treatment steps and a reduction in the amount of chemicals used, thus reducing the cost of treatment. The reduction in treatment costs was of the order of 3 million reais annually, keeping the effluent treated with concentrations of contaminants below the limits of environmental regulation.
Plenary
10/2/19, 9:50 AM - 10/2/19, 10:15 AM
Presenter(s): rodrigo Madrona dias (usiminas), Rodrigo Seara Martins (Usiminas), Márcia Maria da Silva Monteiro Pereira (Imerys), Sebastião Garcia Mendes (Imerys), Gérson T. Ferreira (Imerys)
Abstract:
In the continuous casting process, the contact of liquid steel in a water cooled mold form a solidified skin. The breaking of this skin, known as breakout, should be avoided since it will cause serious damage to the process. A breakout detection system is used, responsible for generating alarms in situations conducive to the break of skin, the casting speed is then reduced trying to avoid it. The occurrence of breakouts is due mainly a lack of lubrication, an obligation that is attributed to the mold powder. Therefore, the powder properties that have relation with this function can be changed, trying to decrease the tendency to the occurrence of sticker breakout and sticker alarms. In this present work, the break temperature of peritetic steels mold powder was changed trying to reduce the number of alarms. Reducing this temperature decreased the number of alarms, without affecting the longitudinal crack indexes in slabs, resulting in lower scrap losses and higher process productivity.
Plenary
10/2/19, 9:50 AM - 10/2/19, 10:15 AM
Presenter(s): CAIO VACCARI SILVA (IFES), Anna paula littig Berger (IFES), Victor bridi Telles (IFES), Felipe fardin Grillo (IFES), José roberto de oliveira (IFES)
Abstract:
In the present work an analysis of the dephosphorizing efficiency of a standard mixture M1 and other five mixtures where the mixing mass added to the system (60,70 and 80g), temperature (1350ºC and adjusted 1350ºC) and addition methodology were varied. Experimental tests were carried out at a temperature of 1400°C, with constant agitation of 450 RPM in a resistance heated furnace. Simulations were also performed through computational thermodynamics software FactSage 7.2 and analyzes of images of the surface of the crucible obtained at the end of the experiments were analyzed through the software Quantikov. The mixture M1 yield better efficiency than the others in all the studied situations, as it was observed that the best experimental conditions were adding 70g of the mixture, temperature of 1400ºC and standard mythology addition, meaning a complete addition of the mass in the beginning of the experiment
Plenary
10/2/19, 9:50 AM - 10/2/19, 10:15 AM
Presenter(s): BEATRIZ CORDEIRO DE BONA (unifesspa), Vinícius Lemos Pereira (unifesspa), Isaac Gabriel Peixoto Borges de Oliveira (unifesspa), Vanessa Cordeiro de Bona (ufpa), Ponnyk Melo Torres (Faculdade metropolitana de marabá), Dilson Nazareno Pereira Cardoso (ufpa), Clesianu Rodrigues de Lima (unifesspa)
Abstract:
The deposition of electric steelmaking slag (EAE) is an environmental problem of the steel producing industry. In order to give purpose to this residue, the synthesis of geopolymers was developed through a mixture composed of kaolin clay (MBA), EAE, Sodium hydroxide (NaOH), alkaline aqueous sodium silicate (SSAA) and water. First, slag and Clay were selected, grinded, sifted and analyzed by means of X-ray diffraction, X-ray fluorescence and laser granulometry. With the calcined MBA, at 600°c for 2 hours, adding EAE (40 and 30% of the solid mixture), and the liquid mixture (NaOH, SSAA and Water), two traces of geopolymers were produced. The geopolymeric specimens produced were cured at room temperature (28 °C) for 7 and 28 days. After curing, they were characterized by the analysis of resistance to axial compression, water absorption by capillarity, apparent porosity and density. It was found that the Geopolymer with 30% of EAE presented better compressive strength compared to 40%. After 28 days of healing, the 30% trait showed an increase in water absorption, evidencing the failure to conclude the synthesis by decreasing the axial compressive strength. The EAE presented a favorable result to its use as a precursor in the synthesis of geopolymers, for the application in civil construction, reducing the possible environmental impacts of the deposit of this residue.
Plenary
10/2/19, 9:50 AM - 10/2/19, 10:15 AM
Presenter(s): anderson denadai thomazini (Vale s.a.), Eduardo Poltronieri Trés (Vale s.a.), Francisco de Assis Dutra Macedo (Vale s.a.), Gilvandro Bueno (Vale s.a.), Rodrigo Boyer Fernandes (Vale s.a.), Rossano Augusto Pilon Nunes (Vale s.a.)
Abstract:
The first industrial applications of roller presses at the comminution were in 1984 in the cement industry. Since then, the equipment has taken more space in the mineral industry. However, many challenges are still present in this equipment, more specifically regarding to ore breakage predictability. The application of this equipment in the pellet feed preparation is fundamental to increase the surface area (blaine index) of the mineral using reduced energy consumption. However, even after several pressing steps, it is still challenging to achieve granulometry in percentages required for the pelletizing process. Currently these levels are reached in wet milling processes, typically carried out in wet ball mills. For the of pellets formation in pelletizing plants, both pelletizing and the firing processes requires finer granulometry. The motivation of this work is to study the pelletizing process, comparing the physical quality of the pellets produced only through comminuted ore in roller press, comparing the pellets produced in conventional comminution using circuit with ball mill.
Plenary
10/2/19, 9:50 AM - 10/2/19, 10:15 AM
Presenter(s): gabriel rubio pirillo (UNIVERSIDADE DE SÃO pAULO (usp)), MAURÍCIO GUIMARÃES BERGERMAN (UNIVERSIDADE DE SÃO pAULO (USP)), Humberto Almeida de La Serna (AGÊNCIA NACIONAL DE MINERAÇÃO (anm)), Kayleigh Meneghini (universidade de são paulo (usP)), EDUARDO MONMA (AGÊNCIA NACIONAL DE MINERAÇÃO (ANM))
Abstract:
The Mining Annual Report (RAL) is an obligation for every current owner of a brazilian mining process which is already undergoing extraction. This document is basically composed by the company’s annual book balance, where is possible to educe informations that allow to evaluate the mineral market behavior. This research gathered filtered data linked with RAL production and technical responsability between 2010 and 2017, gotten by the Information Access Law, without the real CNPJ of each company, in order to preserve their identity. The results allow to quantify the Brazilian mining production during the period, illustrating that approximately 46% of the companies can be classified as micro, 30% as small, 20% as medium and 4% as large mining companies. It was observed that the micros concentrate the most part of technical responsibles who sign for more than three mines.
Plenary
10/2/19, 9:50 AM - 10/2/19, 10:15 AM
Presenter(s): rodrigo fina ferreira (vale s/a)
Abstract:
Since 2011 mineral cargo shippers shall comply with the Maritime Solid Bulk Cargoes (IMSBC) Code regulatory framework, established by the International Maritime Organization. Some mineral cargos may liquefy during passage, under certain conditions, if the moisture content is beyond a certain level, and the cargo shifting may jeopardize the stability of the vessel. For cargos which are susceptible to this phenomenon the IMSBC Code stablishes that the moisture content shall be below the Transportable Moisture Limit (TML) for safe transportation by sea. Iron ore fines TML can be determined through the Modified Proctor/Fagerberg Test for Iron Ore Fines. Knowledge related to the TML has become essential to shippers, and research works related to this parameter are increasingly frequent. However, the typical daily productivity for having a TML result through this method is one up to two samples per executant person, requiring approximately 50 kg per sample. This study presents a practical example of the application of a prediction model for estimating the TML. The model application reduced substantially the laboratory work and sample quantity requirement for obtaining conclusions related to the TML.
Plenary
10/2/19, 9:50 AM - 10/2/19, 10:15 AM
Presenter(s): eduardo mussi bueno (Usiminas)
Abstract:
A major repair of a production line classified as critical is an extremely important event, because it is a long-term shutdown that directly affects the flow of production company and also a unique opportunity to recompose the availability designed for this line. Thus, in order to fulfill the duration and scope established for this event, it is necessary to have an updated programming model updated with the best practices and that enables an integrated vision of all the services foreseen for the major repair. In this context, this work seeks through bibliographic research successful practices in scheduled maintenance shutdowns, introducing improvements in the programming model of major repairs used, thus providing a work pattern aligned with the need of the company.
Plenary
10/2/19, 9:50 AM - 10/2/19, 10:15 AM
Presenter(s): sergio cordero calvimontes (universidad federal do rio de janeiro), Antônio José Oliveira Cabral (Universidade Federal Fluminense), Rafaella Martins Ribeiro (universidad federal do rio de janeiro)
Abstract:
Using a problem simplification process involving Flash-Butt Welding, it is possible to create and computationally implement a mathematical model on the Octave® platform, in order to analyze the thermal profile behavior in dissimilar welding. An analytic comparison is done using the implementation results and the results of Flash-Butt Welding experimental characterization research.
Plenary
10/2/19, 9:50 AM - 10/2/19, 10:15 AM
Presenter(s): darley da silva lima (Universidade federal do ceará), walney silva ARAÚJO (universidade federal do ceará)
Abstract:
As a final part of the steel production chain, continuous casting exposes its rollers to high process temperatures, thermal / mechanical fatigue, abrasive wear, and damage caused by corrosion processes. Collapses in casting rolls occur from the occurrence of failures as a result of nucleation / propagation of pits and cracks in reheated zones after welding or heat treatment processes. Pitting and cracking corrosion are the most frequent and the anodic dissolution of the metal is accelerated within the discontinuities promoted by the presence of hydrofluoric acid (HF), which will be formed from the reaction of calcium fluoride (CaF2), a component of the mold flow, material used as lubricant in the primary cooling stage, and water at high temperatures. The martensitic stainless steels have the properties required for the application and have good economic viability, which justifies their increasing use in applications that require high resistance to corrosion, mechanical, wear. Thus, the corrosion mechanisms of AISI 414 and AISI 415 steels were investigated using electrochemical techniques for the monitoring of open circuit potential and potentiodynamic polarization in order to study the influence of NaCl concentration on corrosive behavior. The results showed that for AISI 414, OCP values were more negative and the polarization curves tended to decrease potentials and increase current densities. As for AISI 415, the results showed increasing OCP values and polarization plots tending to more positive potentials and lower current densities. Thus, indicating that the AISI 415 presents greater resistance to corrosion when compared to AISI 414.
Plenary
10/2/19, 9:50 AM - 10/2/19, 10:15 AM
Presenter(s): pedro lucas freitas (aRCELORMITTAL TUBARÃO)
Abstract:
With more than 35 years of operation, ArcelorMittal Tubarão's 3 coke batteries are reaching their end of life, but despite this they have to continue to operate and produce quality coke. Supporting the most diverse operating conditions, automation has an important role to play in helping these challenges, helping in actions to increase battery life, maintenance actions, thermal control and more.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): Aline faria da silva (IFES - VITóRIA), Viviane Azambuja Favre-Nicolin (ifes - vitória)
Abstract:
Hot-dip process is one of the most used techniques for the application of metallic coatings with anticorrosive action. The composition of the metal bath to which the substrate will be subjected defines the characteristics that the coating will present. Aluminum, zinc and their alloys are the most suitable for this type of bath. This study evaluated the integrity of aluminum and zinc metal coatings: Galvanized (GI), Galvannealed (GA), Galvalume (GL) and Aluminized through the corrosion resistance measurement in 3.5% NaCl solution, which simulates marine atmosphere, and 1 M H2SO4 solution, which simulates the industrial atmosphere, by means of electrochemical impedance test and potenciodynamic curves. The compositions of the coatings and microstructures were confirmed by MEV and compared with previous studies. All four coatings presented passivation behavior confirming their corrosion resistance, however, Aluminized steel presented better values for potential corrosion and resistivity, confirming its better corrosion resistance compared to the other three coatings. In addition, a significant improvement of the Galvanized steel was observed, which after heat treatment turns into Galvannealed steel.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): Ana Carolina brasil da silva (Centro federal de educação tecnológica celso suckow da fonseca - cefet/rj), Jéssica vicente luiz (Centro federal de educação tecnológica celso suckow da fonseca - cefet/rj), Gláucia domingues (Centro federal de educação tecnológica celso suckow da fonseca - cefet/rj), Bruna brito freitas (Centro federal de educação tecnológica celso suckow da fonseca - cefet/rj)
Abstract:
Corrosion affects several areas in the metal-mechanic sector such as construction, power transmission, telecommunication and general manufacturing processes. This work studied the eficiency of the surface treatment known as bluing as a form of protection against corrosion. Samples were atmospheric exposed and some were simultaneously systematic exposed to a 3% sodium chloride solution in order to accelerate the corrosive process. Samples with three different surface types were used for comparison: one without the bluing treatment, one with bluing treatment and the last with bluing treatment and surface varnished. Tests indicated that the sample without treatment presented a more severe corrosive process, as expected, and that the bluing treated sample atmospheric exposed presented a different value than expected and may be related to several factors. In addition, anodic polarization tests were performed for the three different surface conditions studied in a 3% sodium chloride solution. Results confirmed the field test data in which the sample without the bluing treatment has less corrosion resistance.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): aTHOS fernandes araujo (UFMG), gUSTAVO hENRIQUE sOUSA (ufmg), Franciele Vieira de Souza (UEMG), Carla de Araujo Camilo (UEMG), Jorgimara de Oliveira Braga (UFMG), iGOR cUZZUOL DOS SANTOS (UFMG)
Abstract:
In this work, the corrosion in welded joints by the SMAW process of the API 5L X70 steel in saline medium (NaCl and MgCl2) was determined experimentally and determined its influence on the macrostructure. A sample of the welded material was divided into test specimens to determine the Vickers microhardness, metallographic analysis and immersion test in NaCl and MgCl2 solutions; at concentrations of 1.5% and 4.5% for 35 days. Subsequently, the presence of any defects in the base metal and the weld bead was analyzed under optical microscopy. It was observed higher mass loss in the samples immersed in concentrations of 4.5% of the salts, as well as the occurrence of pitting corrosion only in the heat-affected zone (HAZ). The molten zone presented satisfactory results regarding corrosion resistance.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): BRENO MENDES RABELO AVILA (INSTITUTO Federal do Espírito Santo (IFES)), Jaqueline Polezi Mazini (INSTITUTO FEDERAL DO ESPÍRITO SANTO (IFES)), Dirceu da Silva Júnior (INSTITUTO FEDERAL DO ESPÍRITO SANTO (IFES)), Lucas de Almeida Quaresma (INSTITUTO FEDERAL DO ESPÍRITO SANTO (IFES)), André Itman Filho (INSTITUTO FEDERAL DO ESPÍRITO SANTO (IFES)), Pedro Vitor Morbach Dixini (INSTITUTO FEDERAL DO ESPÍRITO SANTO (IFES))
Abstract:
Titanium alloys are employed in many applications, from uses with seawater to orthopedic implants. In this way, electrochemical tests are being used to anticipate and even mitigate the consequences of corrosion. With this proposal, potentiodynamic polarization and electrochemical impedance (EIS) tests were performed in the most commercialized titanium alloy in the world, the Ti-6Al-4V, in solutions with sodium chloride that simulate the seawater and the physiological fluids. The evaluation was conducted by the analysis of the polarization curves and the electrical aspects of the passive layer, such as its resistance and capacitance. The results of the polarization test show the absence of pitting corrosion and a low density of passivation current, endorsing the understanding of the titanium alloy as high corrosion resistant material; otherwise, there is also a decrease in the equilibrium potential with the increase of the solution aggressiveness. By the EIS tests, it is noticed a significant decrease in the resistance of the compact film in the solution of higher salinity due to the destabilization of the passive layer caused by the Cl-.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): Eron Nadu Santos (unileste/mg)
Abstract:
Duplex and austenitic stainless steels are characterized by presenting interesting combination of high mechanical properties and corrosion resistance and, therefore, it is considered quite versatile. Duplex stainless steels are widely used in chemical and petrochemical industries, because it has a greater resistance to corrosion under tension. The document shows a comparison between the corrosion resistance of duplex stainless steels UNS 2304, 2205 and AISI 304 austenitic stainless steel, widely used in the Brazilian industry. The results obtained in laboratory practice experiences have shown these materials.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): FRANCIELLY Moura DE SOUZA SOARES (IME MILITAR DE ENGENHARIA), Ana Isabel de carvalho santana (universidade estadual da zona oeste), Emília MONTEIRO DOS SANTOS (INSTITUTO MILITAR DE ENGENHARIA ), Luíza Braga ferreira dos santos (instituto militar de engenharia ), maria elisa rodrigues coimbra (instituto militar de engenharia ), Paula anastacia morais cairo gomes (instituto militar de engenharia ), Carlos nelson elias (instituto militar de engenharia )
Abstract:
Different metallic materials are used for biomedical applications such as stainless steels, chromium-cobalt alloys and titanium and its alloys. These materials have high mechanical strength, biocompatibility and high corrosion resistance. This high corrosion resistance is related to the ability of these alloys to form a passive protective film on their surface. This protective film can be disrupted in the presence of some ions such as fluorides and chlorides. This work aimed to elucidate the corrosion resistance properties of these alloys and to show through electrochemical tests the corrosion resistance of three alloys used for biomedical application. The three alloys studied were CrCoMo, Ti CP and Ti ECAP alloys. The electrochemical techniques used were anodic potentiodynamic polarization and potentiostatic polarization. The results of these analyzes showed that the three alloys studied have high resistance to corrosion and are passive. The alloy with the highest corrosion resistance was titanium alloys. No significant difference in strength was observed between Ti CP and Ti ECAP, the current presented by these alloys was very near.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): Gabriel Ribeiro Barbosa (instituto militar de engenharia), Francielly moura de souza soares (instituto militar de engenharia), Emília dos Santos Monteiro (instituto militar de engenharia ), cARLOS nELSON ELIAS (INSTITUTO MILITAR DE ENGENHARIA )
Abstract:
Titanium alloys are widely used for the manufacture of dental and orthopedic implants. Its use is owing to high corrosion resistance, biocompatibility and mechanical resistance. The most used alloy for implant is the Ti-6Al-4V alloy because it is an alloy with high mechanical strength. However, this alloy has elements such as Al and V that can cause deleterious health effects. Cp-Ti is widely used because it is fully biocompatible, but does not have adequate mechanical resistance for some applications. Studies have been looking for alloys that can supply the lack of fully biocompatible and high strength alloys, such as alloys containing elements as Ti, Nb, Ta and Zr. Corrosion resistance is another important parameter to measure the success of these alloys for biomedical use. In this work, corrosion tests were carried out using the potentiodynamic polarization technique of titanium grade 4 hard (TiG4), Ti-6Al-4V and Ti-30Nb-7Zr alloys. The microstructures of these alloys were characterized by optical microscopy. It was possible to observe by the corrosion test a similar behavior of the three alloys, in which the small difference in the current can be associated to the difference of their composition. It was observed β globular precipitates in the α-matrix of the Ti-6Al-4V alloy, a microstructure composed entirely of the α-phase with deformed grains in the TiG4 alloy and irregular α-phase precipitates in the β-matrix of the Ti-30Nb-7Zr alloy.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): Ihana Gabriela Conceição de Jesus (UNIVERSIDADE FEDERAL DE SERGIPE), MARCOS MENINO DE MACEDO FILHO (PETROLEO BRASILEIRO S.A.), matheus duarte de macedo (universidade federal de sergipe), Eliana Midori Sussuchi (universidade federal de sergipe), sandro griza (universidade federal de sergipe)
Abstract:
Carbon steel line pipes are often used to trasnport of oil and injection water of wells. This article has been evaluated a line pipe API 5 CTG.40 to check the possibility to apply to transport of high chloride injection water. Chemical analyzes, microstructural analyzes, microhardness and electrolchemical analyzes were realized to obtain the corrosion rate. The microstructure of the line pipe is formed by grains of proeutectoid ferrite and refined perlite colonies. The medium hardness is 214 HV. The steady state electrochermical analyzes showed the corrosion rate to water produce on laboratory is 0,19 mm/ano.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): JOAO VINICIUS DE SOUZA VARES (UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUl), Jane Zoppas Ferreira (universidade federal do rio grande do sul)
Abstract:
Galvanization is one of the most applied methods to protect steel against corrosion. The objective is to extend the galvanized coating useful life by conversion processes of the galvanized layer, which delay the corrosion onset. Chromatization is the process most used for these purposes. The demands of cleaner Technologies are increasingly a necessity. Nanostructured ceramic coatings have good corrosion and abrasion resistance, and it is a good alternative to chromatization. This type of coating consists in forming a layer of nanometric thickness of zirconium oxide on the galvanized steel surface. In this work a study is presented about the influence of solution pH, immersion time, solution concentration and diameter of the coated wires on the corrosion resistance by the conversion coating. It was verified the existence of a significant interaction effect of the evaluated factors for the results of time to start coating corrosion.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): kellen tebaldi da cunha (estudante ufrgs), hugo marcelo veit (ufrgs)
Abstract:
Every material experiences some kind of interaction with the surroundings in which they are exposed. In metals, the corrosion process is considered a natural, unwanted process. In carbon steels, this process can be very fast, which leads to the development of protective coatings. The most commonly used process is hot dip galvanizing (consisting on the application of metallic zinc). In this work, the objective was to evaluate the quality of zinc coating in hot dip galvanized conduction pipes produced by a metal-mechanic company, comparing the old production process (with low degree of control and automation) with the modernized process (more automatic and with better operational control). The investigation was performed through tests performed on samples taken from the process before and after the improvement in order to compare the results and evidence the improvements obtained. The tests used were: measurement of coating thickness by non-destructive test and destructive test, coating uniformity, flattening and metallographic analysis of the zinc coating. The main results showed that there was a significant improvement in the quality of the coating layer as well as control in the coating thickness after the improvement in the production process.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): laís Couto dos santos (Instituto militar de engenharia), Angelus Giuseppe Pereira da silva (universidade estadual do norte fluminense darcy ribeiro), elaine cristina pereira (UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE DARCY RIBEIRO), Luiz paulo mendonça brandão (instituto militar de engenharia)
Abstract:
The evaluation of corrosion in components used in the offshore industry is an indispensable tool to correct and prevent the deterioration of the systems in the sector. The objective of this study was to analyze the punctual corrosion in API 5L X60 steels of two connections in relation to the density and depth, besides characterizing the subproducts deposited on the base metal. The distribution of pites was uniform; however, the corrosive process in the industry developed so that the cavities became quite deep, representing an alarming loss of thickness. In addition, the comparison between the connections shows a difference in the composition of the semiprotective layer related, probably, to the exposure time
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): MATHEUS PORTO TRINDADE (UNIVERSIDADE FEDERAL DE SERGIPE), Ihana Gabriela Conceição de Jesus (UNIVERSIDADE FEDERAL DE SERGIPE), Maycon Jhosevan dos Santos (Faculdade de Administração e Negócios de Sergipe), Eliana Midori Sussuchi (universidade federal de sergipe), sandro griza (UNIVERSIDADE FEDERAL DE SERGIPE)
Abstract:
The non-adherent layer riser ducts have a multilayer configuration each with distinct functions aiming to guarantee the integrity of the oil lifting process from the ocean floor. This study aims to qualitatively evaluate the susceptibility to corrosion of traction armature material. For that, tests of chemical analysis, microhardness and roughness were carried out followed by a comparison between immersion corrosion and electrochemical corrosion tests. As a way of analyzing the occurrence of crevice corrosion associated with stress corrosion, three-point bending tests were performed, emulating the configuration of sliding superimposed layers with permeability to the external medium (ocean water).
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): Paulo Guilherme Gonçalves de Araujo (Faculdade de Engenharia - UNESP, Campus de Guaratinguetá), Florencia Furch (universidad Tecnológica nacional - Facultad Regional Córdoba), Igor Alexandre Fioravante (FACULDADE DE ENGENHARIA - UNESP, CAMPUS DE GUARATINGUETÁ), Jonas Fernando Macedo (FACULDADE DE ENGENHARIA - UNESP, CAMPUS DE GUARATINGUETÁ), Heloisa Andréa Acciari (FACULDADE DE ENGENHARIA - UNESP, CAMPUS DE GUARATINGUETÁ), Roberto Zenhei Nakazato (FACULDADE DE ENGENHARIA - UNESP, CAMPUS DE GUARATINGUETÁ), Eduardo Norberto Codaro (FACULDADE DE ENGENHARIA - UNESP, CAMPUS DE GUARATINGUETÁ)
Abstract:
The aim of this study was to investigate the effect of microstructure and composition on the corrosion behavior of api 5l x65 microalloyed steels in acid media. X65MS (Cr-enriched) and X65M (Ni- and Cu-enriched) steels show a ferritic-pearlitic microstructure. The former exhibited high ferrite grain refinement, whereas the latter exhibited a coarse microstructure with bands. In deaerated acid medium, the electrochemical behavior of both steels was similar and the values of the corrosion parameters were very close. When the deaerated medium was saturated with H2S, the corrosion potentials were lower, corrosion current densities and hydrogen permeation current densities were higher, in particular, in X65M steel. It showed lower general and localized corrosion resistances in both media, probably because it is more heterogeneous and more phases are present in its microstructure.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): Paulo Guilherme Gonçalves de Araujo (feg - UNESP), florencia furch (universidad tecnológica nacional - facultad regional córdoba), jonas fernando macedo (feg - UNESP), igor alexandre fioravante (feg - unesp), heloisa andréa acciari (feg - unesp), eduardo norberto codaro (feg - unesp), roberto zenhei nakazato (feg - unesp)
Abstract:
The objective of this work was to study the effect of hydrogen sulfide on the corrosion of API 5L X70 MS and API 5L X70 MO steels used in the manufacture of pipes for the petroleum industry. Hydrogen induced cracking (HIC) and sulfide stress cracking (SSC) tests, open circuit potential and potentiodynamic measurements were carried out in NACE TM 0177A solution. In both of steels, the electrochemical corrosion parameters were similar in acid medium. But, the susceptibility to cracking is higher in API 5L X70 MO steel than API 5L MS steel.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): Neyda de la caridad om tapanes (centro universitário estadual da zona oeste uezo), Mauricio Monteiro Machado (Nuclebras Equipamentos Pesados-NUCLEP), Ana Isabel de Carvalho Santana (centro universitário estadual da zona oeste uezo), RODOLFO SALAZAR PEREZ (centro universitário estadual da zona oeste uezo), Rodrigo Ribeiro Soares (Nuclebras Equipamentos Pesados-NUCLEP), roberta gaidzinski (centro universitário estadual da zona oeste uezo)
Abstract:
Pressure vessels are equipment used in the most varied industries, being responsible for a significant portion of the budget. The materials most used for the construction of pressure vessels for the oil and gas industry are carbon steel alloys and in some cases the use of stainless steel alloys is justified. The objective of this work was to study the characteristics of pressure vessels, manufacturing materials and the cost of purchasing pressure vessels by Petrobras. For development, two data processing tools were used: the Law of access to information that allowed the creation of a database, and the Planning of experiments that made it possible to evaluate the influence of the type of material and other variables on the price of the vessel (response variable). Statistical results show that, for the analyzed ranges, the length between tangents (LBT) and Diameter (D) have a direct statistical influence on the price response variable. Finally, the study was able to reconcile constructive aspects with financial factors of great value to manufacturers of pressure vessels.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): THAÍS DA SILVA LEITE GARCIA (CENTRO UNIVERSITÁRIO DE BARRA MANSA), ISABELA VALENTE OLIVEIRA (eNGENHEIRA 999067679)
Abstract:
The search for increased efficiency is related in all corporations, and improvement works are done in a systemic way, but not always the results of them are satisfactory or bring the expected return. The majority of the gases generated in the steel process evaluated are reused (in the process itself), thus reducing the purchase of natural gas, used for heating equipment. Each process generates gases with their own physical characteristics such as pressure and calorific value, and in order to be distributed to the proper processes, they must be under the same pressure. Therefore high pressure fans and a gas reducing station are used so that gases are maintained at 130 mBar of pressure. In order to better exploit the gases generated in the process, it would be necessary to increase the flow rate of the gas from the steel plant, which has a higher calorific value, but the high pressure fan was already working at its load limit, but another was kept as a reserve. The operation of the two high pressure fans in parallel was implemented, which generated instability in the fans and started to generate unexpected process stops due to the excessive vibration of the assembly. The company started to have its maintenance cost increased and significant losses due to the unavailability of the equipment. The present work aimed to identify the failures in the system, to propose improvements and to follow the equipment until the same one again to operate according to the characteristics of the project, aiming the management of a multidisciplinary work group involving specialists of several areas of operation (operation, mechanical and predictive maintenance specialists) in a specific work.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): DANIEL RODRIGUES OLIVEIRA (Instituto federal do pará), Max Suell Dutra (Universidade federal do rio de janeiro)
Abstract:
This paper presents the research of the dynamic behavior of gondola freight car, used for transport of iron ore, on railways with curved geometry and under the influence of worn rail cross-section. The vehicle dynamics simulations are developed with the aid of a multibody systems simulation software, being studied the behavior of empty and loaded freight cars, traveling above rails with worn cross-section profiles and under normal operating speeds. As a criterion for proneness to derailment was adopted the Nadal coefficient. The analysis of results allows infer that wear conditi- ons of cross-section rails and macrogeometry, under simulated conditions, change significantly: Freight car’s dynamics behavior, wheel-rail contact forces and proneness to derailment.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): Julio Cesar de Oliveira lopes (FAB)
Abstract:
Performance-based Logistics (PBL) methodologies set readiness for the warfighter at reasonable costs. There must be a clever and verifiable connection of metrics in order to access and analyze data and to deliver sound and consistent inputs for the entire support system to accomplish its goals. A system of incentives and penalties usually takes place and suggests functions to be maximized and/or minimized in a multi-criterion and highly integrated environment. This study deals with the optimization of the entire setup of Performance-Based Logistics contracts and is limited to a study based on a subsystem of a type of aircraft in the Brazilian Air Force. This study has shown promises results. A mathematical model was solved using Genetic Algorithm. Results indicate that the metrics used for reliability, maintainability, availability, supportability (RAMS) and costs can be optimized simultaneously for clever contracts
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): PAULO ROBERTO CARREGOSA LUIZ (Instituto militar de engenharia)
Abstract:
The objective of this study is to analyze the variables that impede the sustainable development of Air Transport, since the Brazilian domestic market has not yet reached a sufficient degree of maturity, so that it can make continuous progress of this movement that moves people, materials, loads to places distant, often without any other type of communication or connection with another community, or even improve existing routes, making them more efficient and accessible to the population and users, and Air Transport is no longer considered elitist and is more popular today widespread and used throughout the world. The bibliographic and documentary study brought results referring to the crisis in the sector, financial incentives and the evolution of the national trade. It was concluded that the domestic market is not saturated, on the contrary, it presents a clear trend of growth, by the demand of passengers, of the companies and main companies of the sector.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): PABLO ALTOE AMORIM (JAFENG / FAESA Centro Universitário), Flavio da Silva Abreu (CEDISA / FAESA centro Univesitário), Luciano Tristão Rangel (Flexibras Tubos Flexíveis / FAESA centro Univesitário), Gabriel Rodrigo da Silva Menezes (FAESA centro Univesitário), Rafaela Cosmo (FAESA centro Univesitário), Matheus Rhein Martins (FAESA centro Univesitário)
Abstract:
Aiming for an increase in the seamed pipe production line, a company specializing in pipe manufacturing saw, through a structural change in the constructive design of a coil lift assembly, the opportunity to reduce the downtime for steel coil replacement. This paper presents the retrofit design by means of structural analysis of the coil lift assembly that makes up a Cross Cutting Line machine. The design of the project had as premise to attend the operation of the equipment with an increase in nominal capacity from 20 tons to 32 tons, being validated by simulation software using the finite element method (FEM). The critical points of the project after the proposed changes were evidenced in order to present the measures that will be taken to meet the new nominal load capacity of the equipment, making the project feasible for execution.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): FABIO DE OLIVEIRA BRAGA (SENAI - DEPARTAMENTO REGIONAL rj - FACULDADE SENAI), TAMIRES REPOLÊS DOS ANJOS (SENAI - DEPARTAMENTO REGIONAL RJ - FACULDADE SENAI), Marcos Müller Lobato (SENAI - DEPARTAMENTO REGIONAL RJ - FACULDADE SENAI)
Abstract:
In the automotive industry, for the production of complex drawn components, there is the alternative of welding sheets (blanks) with different characteristics, such as mechanical strength, thickness or presence of anticorrosive layers, known as Tailor Welded Blanks (TWB). The laser welding is the main process to produce TWB, due to its high productivity and the ability of minimizing the heat affected zone of the weld. In some cases, it might be advantageous changing the rolling direction of the blanks, in order to use their texture and anisotropy characteristics. Therefore, the objective of this work is to investigate the influence of the rolling direction in the drawability of TWB obtained by laser welding. First, the blanks were characterized by their microstructure and mechanical properties, and then they were welded to obtain the TWB. The welded joints were then characterized by macrography, Erichsen test and Vickers microhardness. No difference in the TWB behavior due to the changing in the rolling direction orientation was observed, and so it is technically possible to use them to obtain special properties in the TWB.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): Leonardo vilela de menezes carvalho (FACULDADE DE ENGENHARIA DE ILHA SOLTEIRA - UNESP), Eli Jorge da Cruz Junior (Instituto Federal de Educação, Ciência e Tecnologia de São Paulo, Campus Votuporanga), Vicente Afonso Ventrella (Faculdade de Engenharia de Ilha Solteira - UNESP)
Abstract:
In view of superduplex stainless steel, known by corrosion coupled with pleasurable mechanical properties, this work aiming link it to noble pulsed laser welding Nd:YAG analyzing the effects of nickel addition face to autogenous welding. The thermal cycle of welding process entails unbalancing the biphasic microstructure modifying original properties due to high formation of ferrite on solidification. Therefore the application of nickel foils to keep the original balance through the stabilization of austenite since it is a gamagenic element. In this regard, analyzes of post-weld microstructures were carried out by means of scanning electron microscopy, as well as Vickers microhardness test, and pitting corrosion tests. The use of this filler metal was shown superior in tests keeping equivalent ferritic-austenitic volume fraction, hardness values closer to base metal, as well as a critical pitting temperature higher than by autogenous process. These results approved nickel application as balancing agent in welding structure bringing the characteristics of weld bead closer to the base metal.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): RAFAEL MENDES DA SILVA (UFF)
Abstract:
The present work has as objective to evaluate the effect of heat input and control of the temperature of interpass through the thermocouple installed in the back to the welding in multiple passes comparing the results obtained with variation of theheat input and interpass temperature. It was evaluate the metallurgical transformations that occur in the AISI 316L stainless steel during the GMAW welding process with the addition of inconel 625 for an overlapping metal with coating effect and will mainly evaluate the interface region evaluating the microstructure of the weld region and vickers microhardness.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): Rafaela dos Santos Silva (UFF), Kevin Rodrigues Couto (UFRJ ), Rudineli Demarque (UFRJ)
Abstract:
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): Afonso rangel garcez de azevedo (UFF), Markssuel Teixeira Marvila (UENF), Euzébio Barnabé Zanelato (UENF), Thuany Espirito Santo Lima (UENF), Jonas Alexandre (UENF), Andreia Arenari de Siqueira (UENF), Gustavo de Castro Xavier (UENF)
Abstract:
One of the main inputs connected to the construction industry are the blocks, which can have the simple function of sealing or structural in a building. There is also a classification of the blocks as to the materials used in their production, such as concrete or clay material, giving rise to the most common type of ceramic blocks. The objective of this work is to evaluate the potential of soil use from a deposit in the city of Rio Bonito, RJ, for the construction of ceramic blocks for building sealing applications. For this purpose, prismatic specimens were prepared by extrusion process, subjected to various firing temperatures (750, 850 and 950 oC), for further analysis of water absorption, linear retraction and mechanical resistance to bending. It was concluded that the specimens burned at temperatures above 850 oC, using only the soil of Rio Bonito, presented parameters within those stipulated by the Brazilian standard, and could therefore be used for this purpose
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): Afonso rangel garcez de azevedo (UFF), Markssuel Teixeira Marvila (UENF), Euzébio Barnabé Zanelato (UENF), Thuany Espirito Santo Lima (UENF), JONAS ALEXANDRE (UENF), Andreia Arenari de Siqueira (UENF), Niander Aguiar Cerqueira (FACREDENTOR)
Abstract:
The state of Espirito Santo has been standing out in the last years in the production of ceramics pieces directed to the growing sector of the civil construction, mainly related to the metropolitan region of Vitoria. The municipality of Itapemirim has been standing out in the regional scenario regarding the production of ceramic artifacts, however a great obstacle to its development is due to the characteristics of raw material available in the region, very heterogeneous. Thus, the objective of this work is to characterize, by means of granulometric tests, Atterberg Limits and chemical analysis of the soil from the municipality of Itapemirim-ES, besides the evaluation of prismatic specimens produced by the extrusion process and burnt at 700, 800 and 900 oC, evaluating mechanical resistance and water absorption. The characterization results showed that the soil presents potentiality of use for the production of ceramic artifacts, while with the increase of the burning temperature the mechanical resistance and water absorption improves substantially improving the quality of the product. At lower temperatures, the specimens did not perform satisfactorily in accordance with Brazilian technical norms
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): alessandra savAZZINI-reis (IFES - VITORIA), KARLA FADINI FIOROT BUSSULAR (IFES - COLATINA), Fernanda Dalarme Gomes Galvão (IFES- COLATINA), André Pinto dos Santos (IFES - COLATINA), BRUNO DA SILVA ASSIS (IFES 0 COLATINA)
Abstract:
With the concern of making the productive sectors more sustainable, the reuse of solid waste generated in the industries has been studied, and a suitable sector to receive such waste for application in new materials is the construction industry. The waste of the textile industry is part of this problem due to the high volume generated, about 170 thousand tons per month in Brazil. The clothing industry wastes are generated at various stages of the manufacturing process, such as knitted patchwork (cloth retail), jeans and fabric produced in the cutting step of the parts. It is expected that the tissue waste behaves as a fiber and will reduce the formation of cracks in the concrete. Tests with Portland cement, sand and gravel concrete with addition of tissue waste in the contents of 0%, 1%, 3% and 5% in relation to the mass of cement were performed. The tissue waste in the form of cloth retail promoted a decrease in mechanical strength and consistency; and increase of water absorption. But, it could be observed that there was a tendency of attenuation of the brittleness of the concrete in the rupture, which may have been promoted by the waste
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): ana beatriz rodrigues porto (UFPA - universidade federal do pará), mathaus moraes lucas (UFPA - universidade federal do pará), sérgio neves monteiro (ime - instituto militar de engenharia), Verônica Scarpini Candido (ufpa - universidade federal do pará), alisson clay rios da silva (ufpa - universidade federal do pará)
Abstract:
Geopolymers are inorganic polymers of a new class of materials that have particular characteristics and are synthesized from the geopolymerization reactions of various constituents as natural raw materials of geological origin containing aluminosilicates which give this material good mechanical properties. The need to reduce energy consumption and CO2 emissions is a constant requirement in the Portland cement industry, generating efforts to improve the efficiency of manufacturing processes, as well as the use of waste and by-products from other industries. presenting great potential of application in the development of new products for the civil construction. The present work had as objective, the dosage study of geopolymer slurries with Blast Furnace Slag (EAF) and without EAF. The mechanical properties of the geopolymer slides were evaluated by the Compressive Strength test and fracture surface analysis of these slides was performed by Scanning Electron Microscope (SEM). The mechanical results showed that the 45% EAF geopolymer gave higher strength gains with 37.37 Mpa compared to the 0% EAF slurry yielding 31.25 MPa. The microstructural results showed that the 45% geopolymer paste EAF obtained a surface with lower porosity and structure, but dense and compact compared to the 0% EAF paste.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): Ana Luiza Campinho Paes (uenf), Jonas Alexandre (uenf), Larissa Campos Granato Botelho (uenf), Andreia Arenari Siqueira (uenf), Thuany Espirito Santo de Lima (uenf), Valber Domingos Pinheiro (uenf), Afonso Rangel Garcez de Azevedo (uenf)
Abstract:
Mortars for covering walls are widely used materials at constructions. To fulfill its function, the main desired properties are substrate adhesion and workability. To reduce cost and time of execution, the projection method can be employed, consisting in the mechanized sprayed of mortar on the substrate. In order to reduce cost even more, some enterprises opt to replace completely the lime, material with high commercial value. It is taken as reference a construction company of Campos dos Goytacazes’s region, which employs the projection system with phyllite, however, after the coating has dried, it presents cracking problems. This article’s aim was to find alternatives proposing a new trace using phyllite. Were performed tests at fresh and hardened state. Due to the absence of specific standards for the projected mortars, they were made according to the existing NBRs, and compared with conventional mortar. The results showed that the projected material had a better executive efficiency, however, when the phyllite was incorporated, the resistances and water retention decreased, while incorporated air content increased. As for the fissures, only decreasing the a/c ratio, it was possible to decrease their presence, which indicates that they are caused by drying shrinkage.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): ANA PAULA DOS SANTOS PEREIRA (IME - INSTITUTO MILITAR DE ENGENHARIA ), Flavio James Humberto Tomassini Vieira Ramos (IME - INSTITUTO MILITAR DE ENGENHARIA ), MARCELO HENRIQUE PRADO DA SILVA (IME - INSTITUTO MILITAR DE ENGENHARIA )
Abstract:
Concrete structures present in areas of high aggressiveness, such as areas near the coast, are prone to attacks by aggressive chemical agents, such as chloride ion attack, resulting in corrosion of the frame and consequent concrete degradation and its breakdown, structure functionality committed. In order to study the behavior of the concrete in the aggressive environment, the methodology used was the accelerated process of aging of the concrete, with a maximum period of 120 days, and parallel to this process axial compression tests were performed at the ages of 7, 28, 60. , 90 and 120 days, as well as tests of chloride, conductivity, total dissolved solids, salinity, in the same period. Through the tests, it is possible to observe the effect of the chlorides in the concrete structures, but in an incisive way in the reinforcement, already the concrete presented a pathology that does not take into account that is the efflorescence, and its performance became very visible after the period of 60 days
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): BEATRYZ CARDOSO MENDES (UNIVERSIDADE FEDERAL DE VIÇOSA), Leonardo gonçalves pedroti (universidade federal de viçosa), PEDRO HENRIQUE COTA DRUMOND (UNIVERSIDADE FEDERAL DE VIÇOSA), Afonso rangel garcez de azevedo (universidade federal fluminense)
Abstract:
The incorporation of iron ore tailings as a raw material for the production of red ceramic bodies is a new alternative to reuse the waste and add sustainability to the mineral and civil construction sectors. In order to attest the technical feasibility of a new product, it is necessary to evaluate the physical and mechanical properties. In this work, the physical and mechanical characterization of clay bricks produced from a mixture defined in a previous research, containing iron ore tailings and two clayey materials (29.1% of iron ore tailings; 40.9% of gray clay; 30.0% of yellow clay) was performed. The pieces were formed by pressing and fired at 950°C. After the firing, the properties of firing linear shrinkage, apparent porosity, bulk density, water absorption and compressive strength of the specimens were assessed. The purpose of this work was to evaluate the effect of bulk density variation on the other properties. It was verified that the adopted composition can be used to produce sustainable construction clay bricks, meeting the standards for this product, provided that the brick has a minimum bulk density after firing equal to 1.741 g/cm³.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): CAMILA OLIVEIRA BAPTISTA (IME - INSTITUTO MILItar de engenharia), Pedro henrique poubel mendonça da silveira (IME - INSTITUTO MILITAR DE ENGENHARIA), bruno figueiredo de abreu ferreira cardoso (IME - INSTITUTO MILITAR DE ENGENHARIA), alaelson vieira gomes (IME - INSTITUTO MILITAR DE ENGENHARIA), andre ben-hur da silva figueiredo (IME - INSTITUTO MILITAR DE ENGENHARIA), claudio luiz de oliveira (IME - INSTITUTO MILITAR DE ENGENHARIA)
Abstract:
Improved fuel performance, increased thermal efficiency of the nuclear power plant and the main advantages of ceramic uranium fuel, while interdependent, are correlated. The uranium ceramic compound and its significant nuclear, physical, thermal and mechanical properties are introduced and analyzed in this review, which details its characteristics and applications as nuclear fuels. The production, preparation and manufacture of the ceramic fuels are generally accomplished by grinding, pressing and sintering steps in the atmosphere which may be inert or reductive. Compounds of uranium ceramic fuels used in nuclear reactors may consist of a uranium-oxygen system, a uranium-carbon system and a nitrogen-uranium system. In general, the stability of irradiation, including dimensional, structural and volumetric fuels, is better than that of metal fuels. The desire to use the fuel in order to extract and maximum allowable linear power results in most fuel element designs where the core temperature is close to the melting point of UO2.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): CAMILA OLIVEIRA BAPTISTA (IME - INSTITUTO MILitar de engenharia), danúbia bordim de carvalho (IME - INSTITUTO MILITAR DE ENGENHARIA), letícia dos santos aguilera (IME - INSTITUTO MILITAR DE ENGENHARIA), FLÁVIO JAMES HUMBERTO TOMMASINI VIEIRA (IME - INSTITUTO MILITAR DE ENGENHARIA), josé brant de campos (uerj - universidade do estado do rio de janeiro), claudio luiz de oliveira (IME - INSTITUTO MILITAR DE ENGENHARIA), ronaldo sérgio de biasi (IME - INSTITUTO MILITAR DE ENGENHARIA), andré ben-hur da silva figueiredo (IME - INSTITUTO MILITAR DE ENGENHARIA)
Abstract:
Barium hexaferrite nanoparticles (BaFe12O19) were produced by combustion using glycine/nitrate ratio (GN) 1,0, 1,5 e 2,0. The samples were characterized by X-ray diffraction (XRD) and two phases were identified, one monoclinic (BaFeO2,5) and another hexagonal (BaFeO2,07). Also, it has been found that increasing the NG fuel rate increases the crystallinity in barium hexaferrite, possibly due to the increase in particle size. Scanning electron microscopy (SEM) revealed agglomerates of particles that constituted the product of combustion.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): EUZEBIO BERNABE ZANELATO (UENF), Jonas Alexandre (UENF), Afonso Rangel Garcez de Azevedo (UFF), Markssuel Teixeira Marvila (UENF), Sergio Neves Monteiro (IME), Thuany Espírito Santo de Lima (UENF), Gustavo de Castro Xavier (UENF), Giovani Bruzzi (UENF)
Abstract:
Mortars are versatile materials that are used for different purposes of the work, such as laying, coating, grouting etc. Among the applications that most present pathologies is the application for coating. The lack of uniformity in the dosage of the traces on site, the lack of adequate packaging among others promote the appearance of pathologies that can lead to serious damages after its execution. The objective of this work is to evaluate the properties of commercial mortars in the municipality of Campos dos Goytacazes and to compare them with traits dosed in the laboratory. Tests of consistency, water retention, tensile strength in flexion and compression were performed. Brush adhesion tests were also carried out to check the tensile strength. With the accomplishment of the tests it was possible to conclude that some brands obtained satisfactory results, nevertheless, a mark presented worrisome results for use in coatings
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): EUZEBIO BERNABE ZANELATO (uenf), Jonas Alexandre (uenf), AFONSO RANGEL GARCEZ DE AZEVEDO (UFF), Markssuel Teixeira Marvila (uenf), Sergio Neves Monteiro (ime), Thuany Espírito Santo de Lima (uenf), Gustavo de Castro Xavier (uenf), Giovanni Bruzzi (uenf)
Abstract:
The ornamental rock industry is a strategic market of great importance for different regions of the country, especially for the southern state of Espírito Santo. The municipality of Cachoeiro is recognized as the largest ornamental rock pole, presenting hundreds of industries destined to this sector as well as nearby municipalities with great availability of rocks. Despite the importance of this sector, the environmental impact generated by the ornamental rock industry is significant and several measures are taken to reduce the environmental impact. The objective of this work is to perform the characterization of the clays of the city of Alegre to boost the local ceramic sector aiming at the reuse of the waste generated by the ornamental rock industry. A mapping of the region was carried out to identify deposits and collected clays from four different points. For the characterization of the clays were carried out the tests of granulometry, real density of the grains, Atterberg Limits and Chemical analysis. The results indicate potential of use of two clays of the region for use in ceramics
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): EUZEBIO BERNABE ZANELATO (UENF), Jonas Alexandre (UENF), Afonso Rangel Garcez de Azevedo (UFF), Markssuel Teixeira Marvila (UENF), Sergio Neves Monteiro (IME), Thuany Espírito Santo de Lima (UENF), Gustavo de Castro Xavier (UENF), Thais Pirovane (UENF)
Abstract:
The ceramic industry is an important market for different regions of the country. The high demand for ceramic construction materials coupled with an industry that does not demand cutting-edge technologies has made ceramics gain a significant share of the market. The incorporation of new technologies for this sector is not only feasible but indispensable for the longevity of the sector, since other materials have been gaining strength to replace the ceramic materials. With the objective of allying new technologies besides considering the environmental factor, the characterization of the clays of the municipality of Vargem Alta-ES will be carried out to obtain a ceramic mass with higher performance. A mapping of the region was carried out to identify deposits and collected clays from 5 different points. For the characterization of the clays were carried out the tests of granulometry, real density of the grains, Atterberg Limits and Chemical analysis. The results indicate potential of use of two clays of the region to take advantage of the ceramics
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): Laimara da Silva Barroso (uenf), Markssuel Teixeira Marvila (uenf), afonso rangel garcez de azevedo (uff), Lays da Silva Barroso (iff), Euzébio Bernabé Zanelato (uenf), Jonas Alexandre (uenf), Sergio Neves Monteiro (ime)
Abstract:
Gypsum has long been used in mortars because of the ease of production and molding, as well as its ability to harden quickly, which is related to the action of the handle. In order to evaluate the effect of the granite residue on some properties in the hardened state, three mortars with a 1: 3 trace (gypsum: sand) mass were produced using granite residue with the following contents, in relation to the mass of sand: 25% and 50%. One of the mortars was used without the addition of granite residue as reference, maintaining the water / gypsum ratio in 1 for all mortars. Resistance to compression, flexural tensile strength, immersion water absorption and bulk density in the hardened state were determined, all at the age of 28 days. The results showed that it is feasible the use of granite residue in plaster mortars, presenting an improvement in its performance.Inserir a versão do resumo para o idioma inglês, sem uso de parágrafo
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): laimara da silva barroso (uenf), MARKSSUEL TEIXEIRA MARVILA (uenf), afonso rangel garcez de azevedo (uenf), euzébio bernabé zanelato (uenf), jonas alexandre (uenf), sergio neves monteiro (ime)
Abstract:
The use of ornamental stone residues, mainly granite, has been researched in order to reduce the environmental impact. One way to reuse them is to incorporate the granite residue into the plaster mortar. This work aims to present the influence of the granite residue on the properties of the fresh state in plaster mortar. Results of the use of the granite residue with addition in gypsum mortar, in fractions of 0%, 25%, 50%, 75% and 100% in relation to the sand mass were presented. For gypsum mortars produced, flow table, mass density, incorporated air content, water retention, and the squeeze-flow method were evaluated to understand their main rheological characteristics. The analysis of the results allows to conclude that the use of the granite residue as an addition in gypsum mortars is technically feasible only for the contents of 25% and 50%, and that 25% of addition is the content that presents the best performance
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): maria LUIZA DA SILVA MONTEIRO (UNIVERSIDADE FEDERAL DO PARÁ ), CESAR AUGUSTO DE OLIVEIRA GOMES (UNIVERSIDADE FEDERAL DO PARÁ ), SERGIO NEVES MONTEIRO (INSTITUTO MILITAR DE ENGENHARIA ), ALISSON CLAY RIOS DA SILVA (UNIVERSIDADE FEDERAL DO PARÁ ), VERONICA SCARPINI CANDIDO (UNIVERSIDADE FEDERAL DO PARÁ )
Abstract:
This industry generates a variety of solid wastes, liquid effluents and gaseous emissions in its various processing steps. One of the residues generated by the steel industry and the balloon powder that is formed by iron oxides in FeO, Fe2O3 e Fe2O4 forms. Balloon powder is still little used in attempts to reuse it as a co-product, although it can be pelleted by sintering and added to the raw materials in the blast furnace. In this way, the addition of waste in red ceramics is currently one of the main technological solutions for the final disposal of industrial solid waste. The incorporation of the balloon powder in red ceramic masses requires an analysis of chemical and mineralogical composition to obtain specific formulations that collaborate in the search of the improvement of the properties of the manufactured materials. The purpose of this study was to evaluate the effect of the incorporation of 5, 10 and 15% by weight of the residue of the balloon powder into a clay mass composed of strong clay and weak clay, for the production of a structural block ceramic.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): MARKSSUEL TEIXEIRA MARVILA (Uenf), AFONSO RANGEL GARCEZ AZEVEDO (uenf), euzébio bernabé zanelato (uenf), jonas alexandre (uenf), sergio neves monteiro (ime), niander cerqueira aguiar (uenf), vitor barbosa de souza (uff)
Abstract:
The resistance analysis of already constructed reinforced concrete structures becomes infeasible with the use of conventional techniques, since the standard to measure this property is the use of destructive techniques. In this scenario the sclerometry test, a non-destructive test technique, is of great value in estimating the compressive strength of reinforced concrete structures already in service. The objective of this work was to verify the compressive strength of two reinforced concrete slabs of a certain building located in rural environment, whose construction was interrupted before the project was completed. The techniques of obtaining resistance to conventional compression, which consists of the extraction of testimonies for uniaxial compression test, and the technique of correlation by the sclerometry test were used. The results demonstrate the effectiveness of the non-destructive techniques in the analysis of reinforced concrete structures
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): MARKSSUEL TEIXEIRA MARVILA (uenf), Afonso rangel garcez azevedo (uenf), euzébio bernabé zanelato (uenf), Thuany Espírito Santo Lima (uenf), jonas alexandre (uenf), sergio neves monteiro (ime), laimara barroso da silva (uenf), pamela moreira (uenf)
Abstract:
Plaster mortars have durability problems as they have absorbed a lot of water. Therefore, the objective of this work is to study the substitution of 10% and 20% of gypsum for ornamental rock residue in lime mortars with composition 1: 3: 0,8 (gypsum: sand: water), aiming to reduce the contents of the material. For this, tests of consistency, mass density in the hardened state, tensile strength in flexion, compressive strength and immersion water absorption were performed. The results confirm the possibility of using 10% of ornamental rock residue as a substitute for gypsum, since practically all properties under evaluation were improved with this content
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): Michelle Pereira Babisk (Universidade Estadual do Norte Fluminense Darcy Ribeiro), Thainá correia vilela (Universidade Estadual do Norte Fluminense Darcy Ribeiro), MÔNICA CASTOLDO BORLINI GADIOLI (Cetem), CARLOS MAURÍCIO FONTES VIEIRA (Universidade Estadual do Norte Fluminense Darcy Ribeiro)
Abstract:
Cellular solids are highly porous materials resulting from the insertion of a gaseous phase into a solid phase, which may be ceramic, metallic, polymeric or composite, with characteristics depending on the material of this solid. Foams glasses are examples of these glasses structure materials and are mostly used as thermal and acoustic insulation. Foams glasses are obtained by the addition of a porogenic/foaming agent to the finely milled glass and heated at temperatures above its softening point. The ornamental rocks are basically subdivided into granites and marbles. Like marble, the carbonate rocks generally fit. In the processing of the blocks in the sawmills, the waste generated is 40% of the volume of the block processed. It is estimated that about 1.5 Mt of the fine wastes (stone dust) are generated annually in Brazil. The objective of this work was to characterize a beverage packaging glass waste for use as a matrix and a marble waste for use as foaming agent in the development of foams glasses. The wastes were characterized by chemical, mineralogical, particle size distribution, thermal and morphological analysis. The results proved that the wastes are able to develop foams glasses for the desired purposes, glass waste as matrix and marble waste as foaming agent.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): Pamella inacio moreira (uenf - universidade estadual do norte fluminense darcy ribeiro)
Abstract:
The objective of this work is the study of mortars of multiple use of ornamental rock residues (RRO), from the municipality of Cachoeiro de Itapemirim/ES. The materials used will be: Portland cement type CPII, CPIII and CPV and washed sand of the region. The sand of the mortars will be replaced by percentages of 10%, 30% and 60%. Thus, using the Squeze Flow method will evaluate the level of workability of the different compositions tested, the influence of the cement and the influence of the speeds proposed by the cited method.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): PAULO VICTOR NOGUEIRA DA COSTA (Instituto militar de engenharia), Alexandre Pinheiro Guimarães (INSTITUTO MILITAR DE ENGENHARIA), Davi Ricardo Santos de Sousa (INSTITUTO MILITAR DE ENGENHARIA), Leandro Augusto Iorio Pires (INSTITUTO MILITAR DE ENGENHARIA), Leonardo de Araujo Duarte (INSTITUTO MILITAR DE ENGENHARIA), Neuton Severo de Farias Neto (INSTITUTO MILITAR DE ENGENHARIA), Leila Rosa de Oliveira Cruz (INSTITUTO MILITAR DE ENGENHARIA), Gabriel Bartholazzi Lugão de Carvalho (INSTITUTO MILITAR DE ENGENHARIA)
Abstract:
This work analyzes the degradation processes in the CH3NH3PbI3 perovskite compound. Two groups of samples were submitted to different ambient conditions: vacuum and air. Microstructural and optical analyzes were carried out in order to follow the degradation evolution. It was concluded that humidity significantly accelerates degradation process, mainly by an irreversible mechanism.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): Pedro Henrique poubel mendonca da silveira (instituto militar de engenharia), eliziane medeiros dos santos (instituto militar de engenharia), márcio jardim de oliveira (instituto militar de engenharia), Hiron Akira Yamada Magalhães4 (instituto militar de engenharia), Luana Cristyne da Cruz Demosthenes (instituto militar de engenharia), Raphael Henrique Morais Reis (instituto militar de engenharia), paulo roberto rodrigues de jesus (instituto militar de engenharia), jheison lopes dos santos (instituto militar de engenharia), alaelson vieira gomes (instituto militar de engenharia)
Abstract:
In alumina processing, one of the most widely used grinding methods is the ball mill. It is a time-consuming, costly process, as well as not reducing the sintering temperature while maintaining high densification values. Considering this, a comparison of this method with the high energy mill was made. Alumina powders added with niobium and lithium fluoride, polyethylene glycol as binder, addition of 92.8° alcohol and alumina beads were used. Green bodies were prepared by cold uniaxial pressing and sintered at 1300°C and 1400°C. With the Archimedes assay, there was an improvement in the densification of the samples processed with the high energy mill, with mean densification values at 1300°C in 89,96%, with a mean density of 3.5962 g/cm³, at 1400°C in 91,06% average density and 3.6394 g/cm3 average density. Already in the ball mill, at 1300°C resulted in 79,39% and 3.1774 g/cm³, and at 1400°C, 89,90% and 3.5934 g/cm³.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): RICARDO LEITE DIAS (Instituto militar de engenharia - ime)
Abstract:
This research investigated the sintering process of the Brazilian-made α-SiC with addition of mixed Al2O3 and Y2O3. These compounds were firstly milled in a planetary mill. The additive was used in the proportions of 5 and 15%w. The blends were milled again, deagglomerated, sieved and pressed uniaxial and isostatically, at pressures of 30 and 200 MPa. The sintering was made at 1850 ºC, for 30 min, in argon atmosphere. The SiC, Al2O3 and Y2O3 powders, as received, were characterized by electron microscopy, surface specific area measurements and X-ray diffraction. The sintered samples were examined by MEV, optical microscopy, hardness test, density and porosity measurements. The results showed that the properties of the sintered material remained in the range reported by the literature and reached high densities, above 97%. The hardness values range from 20 to 25GPa. The importance of this study is in the prospect of obtaining a product from national SiC, with a low cost when compared to the imported product.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): Sandro Alberto Ibarra Sanchez (Universidade estadual do norte fluminense - uenf), Herval RAMOS PAES junior (UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE - UENF)
Abstract:
Intrinsic zinc (ZnO) and aluminum doped (ZnO:Al) films in concentrations up to 2at%. were deposited on glass substrates by the spray-pyrolysis technique, aiming at their application as resistive gas sensors for ethanol. The effects of deposition and doping conditions on the structural, morphological properties and the reaction of the ZnO films as a gas sensor in the presence of ethanol vapor were investigated. X-ray diffraction analyzes showed that the films are polycrystalline and have the wurtzite hexagonal structure, with preferred orientation in the plane (002) and exhibiting a change in orientation depending on the concentration of aluminum doping. The smallest crystallite size with a value of 32.33nm was obtained in ZnO:Al(1at%.) films. The results for the reaction of the ZnO films as a gas sensor in the presence of ethanol vapor, in particular the influence of the doping with Al, showed that the reduction of the crystallite size allowed a greater oxygen adsorption with response values of up to 93.0%.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): Sergio luiz mineiro (Laboratório Associado de Sensores e Materiais (labas) / Instituto Nacional de Pesquisas Espaciais (INPE)), Helen Beatriz Ferreira (Instituto de Ciência e Tecnologia, Universidade Federal de São Paulo (UNIFESP-SJC)), João Marcos Kruszynski de Assis (Divisão de Materiais (AMR), Instituto de Aeronáutica e Espaço (IAE), Departamento de Ciência e Tecnologia Espacial (DCTA))
Abstract:
Lanthanum manganite in the La-Sr-Mn-O system receives great attention from the scientific community because its Curie temperature close to room temperature, making it interesting for technological applications due to its optical, electrical and magnetic. Another interesting feature for the spatial area is that its emissivity is variable, which gives this ceramic assist in temperature control, justifying its importance in the application in thermal control of satellites. In this work, lanthanum manganite powders were prepared by conventional mixing. The lanthanum manganite was doped with strontium oxide, aiming to replace part of La3+ ions by Sr2+ ions in the perovskite structure. By means of XRD diffraction analysis and quantification of crystalline phases by the Rietveld method, the powder calcination presented intermediate phases besides the formation and progressive increase of the perovskite phase with each processing cycle used. In the sintering stage realized from 1300 to 1400 °C the desired composition La0.875Sr0.125MnO3 was found in major amount. However, even with the higher sintering temperature used intermediate phases were also identified. The sintered ceramics presented residual porosity and denser microstructure with the application of higher temperature, results compatible with the calculated values of relative density.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): suzana souza da silva scardua (ifes), viviana possamai della sagrillo (ifes), Alessandra savazzini dos reis (ifes), beatriz postay de souza (ifes), drielly siqueira perini (ifes)
Abstract:
Considering the results obtained in previous studies that prove the feasibility of the incorporating the residue of flat glass lapping (RLVP) in the production of red ceramics, the objective of this work is to evaluate the feasibility of using RLVP in the production of soil-cement bricks as a partial replacement of soil and the influence on the compressive strength of bricks. For this purpose, bricks with 0, 5, 10, 15 and 20% of residue were molded to replace the soil according to NBR 10833:2012 and were later tested according to NBR 8492:2012. The results confirm that the residue is a potential substitute for the soil in the production of soil-cement bricks, because there is a proportional and progressive increase in compressive strength.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): THUANY ESPIRITO SANTO DE LIMA (UNIVERSIDADE ESTADUAL NORTE FLUMINENSE), Valber Domingos Pinheiro (UNIVERSIDADE ESTADUAL NORTE FLUMINENSE), Jonas Alexandre (UNIVERSIDADE ESTADUAL NORTE FLUMINENSE), Afonso Rangel Garcez de Azevedo (universidade federal fluminense), markssuel teixeira marvila (UNIVERSIDADE ESTADUAL NORTE FLUMINENSE), Euzébio Bernabé Zanelato (UNIVERSIDADE ESTADUAL NORTE FLUMINENSE), Sérgio neves monteiro (instituto militar de engenharia)
Abstract:
Structural masonry is one of the most constructive alternatives employed in Brazil, due to the reduction of cost and the speed of execution. In this system, the wall, which is formed by blocks joined with mortar, acts as structure function. For such construction process, the mortar bedding type can be decisive in the production and the yield of the work. Two types are recommended, full bedding, covering net área for unit and face sheel bedding, where the mortar is placed only in the face shell area of the block. This work aims to evaluate the effect of the mortar bedding type on concrete masonry prisms, observing the compressive strengths and their respective rupture modes. It is concluded that the face shell bedding presents less compressive strength than the full bedding and rupture by separation of the block, while the other type has rupture by combined factors.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): THUANY ESPIRITO SANTO DE LIMA (UNIVERSIDADE ESTADUAL NORTE FLUMINENSE), Jonas Alexandre (UNIVERSIDADE ESTADUAL NORTE FLUMINENSE), Afonso Rangel Garcez de azevedo (UNIVERSIDADE federal fluminense), Markssuel teixeira marvila (UNIVERSIDADE ESTADUAL NORTE FLUMINENSE), euzébio bernabé zanelato (UNIVERSIDADE ESTADUAL NORTE FLUMINENSE), sérgio neves monteiro (instituto militar de engenharia)
Abstract:
In the structural masonry system, the wall performs a structural function, absorbing the loads imposed on the system, being formed by blocks joined by seating mortar. In this constructive method, the quality control of the inputs and the correct dimensioning of the components is of paramount importance. The blocks must have compressive strength compatible with the loads to which they will be subjected, and the mortar must be adequately resisted in order not to compromise the structure of which it is part, and must not be more resistant than the block, and still absorb the deformations to which the masonry is subjected. In addition to the inputs, other factors can compromise the strength of the wall, for example the mortar bedding types. Two types are recommended, full bedding and face shell bedding. In full bedding, the mortar is disposed in all septum of the block. Therefore, this work has the objective of evaluating concrete blocks prisms with two mixed mortars traces of differents compressive strenght. It is concluded that the increase of the compressive strength of the mortar influences the increase in the compressive strength of the prisms with full bedding type.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): THUANY ESPIRITO SANTO DE LIMA (UNIVERSIDADE ESTADUAL NORTE FLUMINENSE), jonas alexandre (UNIVERSIDADE ESTADUAL NORTE FLUMINENSE), afonso rangel garcez de azevedo (universidade federal fluminense), markssuel teixeira marvila (UNIVERSIDADE ESTADUAL NORTE FLUMINENSE), Euzébio bernabé zanelato (UNIVERSIDADE ESTADUAL NORTE FLUMINENSE), sérgio neves monteiro (instituto militar de engenharia)
Abstract:
The structural masonry has as basic characteristic the use of the supporting walls, formed with structural blocks joined by seating mortar. There are many advantages attributed to this system, however the most emphatic are the reduction of the cost and time of execution of the work. The basic components of the masonry are the units and the seating mortar, so they require effective control of their qualities. The blocks must have compressive strength compatible with the loads to which they will be subjected, and the mortar must be adequately resisted in order not to compromise the structure of which it is part, and must not be more resistant than the block, and still absorb the deformations to which the masonry is subjected.In the construction process, the mortar bedding type can be decisive in the production and the yield of the work. Two types are recommended, full bedding, covering net área for unit and face sheel bedding, where the mortar is placed only in the face shell area of the block. this work aims to test the compression of face shell bedding concrete blocks prisms with two traces of mixed mortar with different compressive strength. It is concluded that the increase of the compressive strength of the mortar influences the increase in the compressive strength of the prisms with face shell bedding type.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): VALERIA CRISTINA BRAGA DE MELO (Faci wyden), rodrigo da luz dias (faci wyden)
Abstract:
In the quest for efficiency, flexibility, speed and cost reduction in the construction industry due to the increase of competition among the companies in this sector, it is necessary to seek other constructive alternatives. The great technological development in the field of informatics has allowed the creation of several programs and software that has the capacity to analyze different structural systems that today become indispensable in the day-to-day of the engineer of structures because it allows to simulate and to foresee the behavior of a Structural system before it is put into practice. In this work, we analyze a comparison between the ribbed slabs and different types of filler materials, such as, ceramic blocks, cellular concrete blocks, EPS blocks and plastic molding using the CAD / TQS system that simulates Structural charges based on NBR 6118 of 2003 of the Brazilian Association of Technical Standards. The CAD / TQS calculations, aiming at the objectives of this work, are directed to generate data regarding the consumption of steel and concrete in which each filling material consumes to make the structural system of ribbed slab.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): VICTOR BARBOSA DE SOUZA (UFF / UENF / UNIREDENTOR), Guilherme Moura Reis Coutinho (UFF / UENF / UNIREDENTOR), Lucas Xavier Pereira da Silva (UFF / UENF / UNIREDENTOR), Jonas Alexandre (UFF / UENF / UNIREDENTOR), Niander Aguiar Cerqueira (UFF / UENF / UNIREDENTOR), Maksuell Davila (UFF / UENF / UNIREDENTOR), Afonso Rangel Garcez (UFF / UENF / UNIREDENTOR)
Abstract:
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): VICTOR BARBOSA DE SOUZA (UNIREDENTOR / UFF / UENF), Aloísio Costa Vieira Júnior (UNIREDENTOR / UFF / UENF), Paula Souza Ferreirar (UNIREDENTOR / UFF / UENF), Niander Aguiar Cerqueira (UNIREDENTOR / UFF / UENF), Afonso Rangel Garcez de Azevedo (UNIREDENTOR / UFF / UENF), Cristino pena miller (UNIREDENTOR / UFF / UENF), Jonas Alexandre (UNIREDENTOR / UFF / UENF)
Abstract:
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): Eliziane medeiros santos (IME - INSTITUTO MILItar de engenharia), Arnon de Mello Barbosa (IME - INSTITUTO MILITAR DE ENGENHARIA), Gabriel Barbosa Meireles (IME - INSTITUTO MILITAR DE ENGENHARIA), José Lauro de Oliveira Schramm (IME - INSTITUTO MILITAR DE ENGENHARIA), Lucas Henrique Brito Rodriguez (IME - INSTITUTO MILITAR DE ENGENHARIA), Matheus Fernandes Vivas (IME - INSTITUTO MILITAR DE ENGENHARIA), Vinícius Ribeiro Cavaleiro de Macedo (IME - INSTITUTO MILITAR DE ENGENHARIA), Alaelson Vierira Gomes (IME - INSTITUTO MILITAR DE ENGENHARIA), Flávio James humberto Tommasini Vieira Ramos (IME - INSTITUTO MILITAR DE ENGENHARIA)
Abstract:
The following article aims at analyzing the moisture absorption of polyethylene terephthalate (PET) based composite with geopolymer particles of steel slag. The samples were duly produced in the laboratory, from the slag and PET grinding process, to the geopolymer creation, to the manufacture of the samples with proportions of 0%, 20%, 40% and 60% of geopolymer in the polymer matrix. With the fabrication of the test specimens, the moisture absorption test was performed according to ASTM D570. Changes in porosity, brittleness and other physical characteristics were recorded and analyzed. Through the results, it was verified that the composites with concentrations of 20% and 40% of geopolymers did not obtain great absorptions and greater problems in the processing, encouraging the continuation of the study in search of possible future applications. On the other hand, the composites with concentrations of 60% of geopolymers had a higher absorption having brittle appearance, large amounts of pores and fragility, which made processing difficult. As a complement, having more than just a scientific character, the article serves the purpose of reusing materials commonly discarded in the environment and reusing them in a useful way, and thus following the purpose of sustainability.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): Elton ítalo vieira xavier (UFPE - Universidade Federal de Pernambuco), Lorene Ester Fernandes (UFPE - UNIVERSIDADE FEDERAL DE PERNAMBUCO), Diogo Monteiro do Nascimento (UFPE - UNIVERSIDADE FEDERAL DE PERNAMBUCO), Moisés Euclides da Silva Júnior (UFPE - UNIVERSIDADE FEDERAL DE PERNAMBUCO), Oscar Olimpio de Araujo Filho (UFPE - UNIVERSIDADE FEDERAL DE PERNAMBUCO)
Abstract:
The development and characterization of a composite material with metal matrix of the aluminum alloy AA7075 and ceramic reinforcement of both Alumina (Al2O3) and Silicon Nitride (Si3N4) were studied, the samples were manufactured from commercial powders using mechanical alloying and powder metallurgy. The powders were characterized by scanning electron microscopy (SEM) and the samples already compacted and sintered by light microscopy (LM) and hardness Vickers tests. Composite powders with irregular morphology were obtained and the composite hardness showed to be predominantly increasing with increase of both the reinforcement composition and the milling time.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): LUCIO FABIO CASSIANO NASCIMENTO (Instituto militar de engenharia), Sérgio neves monteiro (instituto militar de engenharia), Andressa Teixeira Souza (instituto militar de engenharia)
Abstract:
The multilayer ballistic armor provides a good weight/protection ratio and has been widely used and researched. Composites reinforced with natural fibers have a number of advantages and are already used as alternative materials to synthetic fibers. In this work, epoxy mallow composites with fractions of 0, 10, 20 and 30% v / v were manufactured for the purpose of evaluating and thermally characterizing the mallow fibers. For the research were used equipment of TGA (Shimadzu model DTG-60H) and DMA (Q800 of TA Instruments). The analyzes concluded that the maximum working temperature is approximately 200 ° C due to the degradation of the components of the mallow fiber, the composite has a glass transition temperature (Tg) close to 95 ° C and the reinforced composites with 30% v / v of mallow obtained a larger storage and loss module
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): LUCIO FABIO CASSIANO NASCIMENTO (ime), sERGIO NEVES MONTEIRO (ime), Raí Felipe Pereira Junio (ime)
Abstract:
As natural lignocellulosic fibers (FNLs) operate excellent mechanical properties, the factor that allows them to be used in various engineering applications. In this context the fibers of mauve (Urena lobata, linn) stand out. In the present work, epoxy composites with mallow fibers were produced in the volumetric fractions varying from 0% to 30%, with the use of two different methodologies for the preparation of the test specimens, the use of silicone molds and laser cutting of the CPs of composite plates. For the analysis of these parameters, it was applied to the analysis of variance (ANOVA) and Tukey's test, from which it was possible to state, with a confidence level of 95%, that the epoxy test bodies reinforced with 30% fibers of malva, produced by silicone molds, had the best performance, reaching values for tensile strength and longitudinal modulus of 177.49 MPa and 20.50 GPa respectively
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): mariana dias machado lopes (uenf)
Abstract:
Composites that use natural fibers as reinforcement have generated great interest in the industrial and scientific community due to the need of materials that have and responsibility with the environment. The aim of the work was to develop and establish a comparative analysis of the mechanical properties of composites formed by polyurethane resin and epoxy reinforced with Bamboo fibers. Initially the fibers were characterized and embedded in polyurethane and epoxy separately for the manufacture of the composite materials. The bamboo fibers were dimensionally characterized and the composites were made with percentages of 30% by volume of bamboo fiber aligned along the entire length. The specimens were tested by Charpy impact and flexion tests. Through the results we can say that it is possible to replace the epoxy resin with the vegetable polyurethane resin based on castor oil, without losing the properties and initial characteristics of the project, also highlighting the sustainability of the components used
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): mariana dias machado lopes (uenf)
Abstract:
The furniture industry in Brazil has exhibited significant growth and development in recent years, but the use of wood is increasingly rare, making wood panels the main raw material for furniture production. As a consequence, the interest in alternative materials highlights the use of lignocellulosic residues, such as bamboo, which is largely produced in Brazil. Aiming to produce a material similar to Oriented Strand Board (OSB), composites were produced with a polyurethane matrix and 40% aligned fibers of bamboo waste. In order to have a better understanding of the bamboo residue used in the present work, the specific mass of the fibers was determined and a microstructural evaluation was made by scanning electron microscopy (SEM). Samples of commercial OSB and composites were made, they were evaluated for the resistance to Charpy impact and flexion, the fracture after the tests was analyzed by SEM. The properties of the composites reinforced with bamboo fiber obtained results significantly superior to those of the OSB being feasible the use of the composite material for use as the OSB.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): mario henrique moreira de moraes (universidade federal do pará), Diogo pontes de queiroz (universidade federal do pará), Victor Hugo Mafra Monfredo Ferreira (UNIVERSIDADE FEDERAL DO PARÁ), Denilson da Silva Costa (Universidade Federal do Sul e Sudeste do Pará ), Wassim Raja El Banna (universidade federal do pará), Deibson Silva da Costa (universidade federal do pará)
Abstract:
Polymer matrix composite materials were made using the following industrial wastes: fly ash and marble-granite. The mass proportions used ranged from 0 %, 5 %, 15 %, 25 % and 35 %, with granulometry of 100 mesh. Isophthalic polyester resin was used with catalisator (proportion of 1 % v/v) and accelerator (in proportions of 1.5 % and 1 % in v / v). The preparation followed the hand lay-up method. Waste analysis was performed using the XRD technique. In addition, physical and flammability tests were performed in accordance with standards NBR 12766 and ASTM 635, as well as mechanical tensile tests (ASTM 3039) and flexure (ASTM 790). The physical properties increased as the compositions increased, due to the gradual increase of density. Mechanical results were not expressive for flexure tests and expressive for tensile tests. Tested materials showed flame retardancy when compared to the recommendations.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): MATTHEUS TORQUATO (IME - INSTITUTO MILI), Raphael henrique morais reis (instituto militar de engenharia), Luana Cristyne da Cruz Demosthenes (INSTITUTO MILITAR DE ENGENHARIA), Anthony Garotinho Barros Assed Matheus de Oliveira (INSTITUTO MILITAR DE ENGENHARIA), Wesley Oliveira da Silva (INSTITUTO MILITAR DE ENGENHARIA), Anderson Oliveira da Silva (INSTITUTO MILITAR DE ENGENHARIA), Sergio Neves Monteiro (INSTITUTO MILITAR DE ENGENHARIA), emilson ribeiro viana junior (universidade tecnológica federal do paraná)
Abstract:
The shaping of composites has been extensively studied for both natural fibers and graphene derivatives. The present work suggests a route for covering natural fibers through the chemical reduction, with thermal catalysis, of graphene oxide (GO). The composites were formed with different concentrations of GO to be reduced, being 0,5mg/ml, 1,0mg/ml and 1,5mg/ml, in the fabrics of sisal and jute. The samples were characterized by scanning electron microscopy (SEM) and atomic force microscopy (AFM), the latter only for the composite of concentration 1.5mg/ml. This study evaluated the adhesion of the reduced graphene oxide (RGO) coating on the sisal and jute fibers through morphological analysis, and it was observed that there was adherence and formation of composite, as was possible to observe that greater concentrations provide better surface coatings.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): Michelle Souza Oliveira (IME), Ulisses Oliveira Costa (IME), Fabio da Costa Garcia Filho (IME), Fernanda Santos da Luz (IME), Anderson Oliveira da Silva (IME), André Ben-Hur da Silva Figueiredo (IME), Lucio Fabio Cassiano Nascimento (IME), Sergio Neves Monteiro (IME)
Abstract:
The study of the natural degradation is of fundamental importance when the degradation is combined with heat, solar radiation, pollution and static or fatigue loads, and also conditions that lead to the aging of the materials with decreasing properties of resistance and rigidity. Therefore, in this work the response to the ballistic impact of a composite composed of sisal fabric and epoxy matrix exposed to radiation for 75, 160 and 225 hours was evaluated. The impact tests were performed at subsonic speed using a 150 bar compressed air draft system. Fourier transform infrared spectroscopy (FTIR) was also performed to observe changes after radiation exposure. The results indicated that the composite obtained good kinetic energy absorption performance, by capturing projectiles, or greatly reducing their velocities.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): Michelle Souza Oliveira (ime), Fabio da Costa Garcia Filho (ime), Fernanda Santos da Luz (ime), Artur Camposo Pereira (ime), Luana Cristyne da Cruz Demosthenes (ime), Lucio Fabio Cassiano Nascimento (ime), Sergio Neves Monteiro (ime)
Abstract:
A thermomechanical analysis (TMA) is one of the tools with the greatest scientific impact, especially in the field of thermal analysis. The basis of the TMA is a reference block of an image in a function of temperature. TMA measurements are not caused by changes in the free volume of the polymer. The characterization of TMA can generate information about the structure, appearance and possibilities of applying various materials. O Fique (Furcraea andina) is a plant that is drawing attention due to its production, about 30 thousand tons / year. With this, the objective of this work was to analyze the epoxy compendium reinforced with stay fabric and its thermal performance. The waves were large in the composites, especially for E-40%FF.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): Michelle Souza Oliveira (ime), Luana Cristyne da Cruz Demosthenes (ime), Wendell Bruno Almeida Bezerra (ime), Emília dos Santos Monteiro (ime), Flávio James Humberto Tommasini Vieira Ramos (ime), Fábio de Oliveira Braga (ime), Lucio Fabio Cassiano Nascimento (ime), Sergio Neves Monteiro (ime)
Abstract:
In recent decades natural lignocellulosic fibers (NLFs) have been extensively researched due to their remarkable properties. The importance of the study of an Amazonian NLF is in collaboration with the preservation of native species, and in addition, in the case of tucum fiber, the importance also comes from the rescue of the culture and the preservation of the traditional knowledge of an Amazonian community. Thus, the analysis of the surface of the tucum fiber by scanning electron microscopy (SEM), by contact angle (CA), and chemistry, was performed using Fourier transform infrared spectroscopy (FTIR). The results showed that the surface is quite rough, with a mean contact angle of 99.3º, and amorphous components such as hemicellulose, lignin and moisture were identified through chemical analysis.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): RAPHAEL HENRIQUE MORAIS REIS (IME ), Larissa fernandes nunes (IME), Flávio James Humberto Tommasini Vieira Ramos (IME), Lúcio Fabio Cassiano Nascimento (IME), Sergio Neves Monteiro (IME)
Abstract:
Polymer matrix composites reinforced with natural fibers are being extensively researched, mainly in multilayer shield systems. On the other hand, new natural fibers have increasingly appeared in the scientific environment, such as guarumã fibers found in varzea regions in the state of Pará. Although widely used in handicrafts guarumã fibers were little explored by academia, particularly , as reinforcing material in composites. Thus, the tensile properties of guarumã fibers were investigated in this work, following the standard ASTM C1557 techniques. The results presented, for the first time in the literature, numerical values regarding the resistance limit, modulus of elasticity and maximum extension of this fiber. In summary, guaruman fibers had their results compared to other studies on the mechanical properties of other fibers, concluding that these fibers have satisfactory mechanical potential, comparable to sisal fibers.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): RAPHAEL HENRIQUE MORAIS REIS (IME MILITAR DE ENGENHARIA), Larissa fernandes nunes (ime), Flávio James Humberto Tommasini Vieira Ramos (ime), Lúcio Fabio Cassiano Nascimento (ime), Sergio Neves Monteiro (ime)
Abstract:
There is a great deal of effort by the academic community to develop new materials with differentiated properties, specifically in multilayer shielding systems. Basically, multilayer shield systems are formed of three layers, such as ceramic inserts, composites reinforced with natural fibers, and, finally, layers of aramid fabric. With this in view, this work investigated the mechanical effects caused by the addition of carbon black in jute fiber reinforced composites. Long-term carbon black is known as a reinforcing agent in tires, while jute fiber reinforced composites have extensive scientific publication in multilayer shield systems, and the combination of these, at least to date, has been poorly investigated . With this in mind, two composites, following the standard D3039 / D3039M-17, were prepared and tested, both composed of 30% by volume of jute fiber and epoxy resin differing only by the doping in one of 5% by volume of Carbon Black. The results obtained in the doped composites presented an improvement equivalent to 15% in the mechanical resistance when compared to its non-doped equivalent. In addition, the carbon black doped composites presented conductive properties, not properly exploited in this work.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): uLISSES OLIVEIRA COSTA (Instituto militar de engenharia), Lucio Fabio Cassiano Nascimento (INSTITUTO MILITAR DE ENGENHARIA), Julianna Magalhaes Garcia (INSTITUTO MILITAR DE ENGENHARIA), Wagner Anacleto Pinheiro (INSTITUTO MILITAR DE ENGENHARIA), Fernanda Santos da Luz (INSTITUTO MILITAR DE ENGENHARIA), Fabio da Costa Garcia Filho (INSTITUTO MILITAR DE ENGENHARIA), Sergio Neves Monteiro (INSTITUTO MILITAR DE ENGENHARIA), Wendell Bruno Almeida Bezerra (INSTITUTO MILITAR DE ENGENHARIA)
Abstract:
Curauá fiber (Ananas erectifolius) is a promising candidate to replace synthetic fibers such as glass and aramid fibers. The addition of graphene oxide (GO) on its surfaces proved to be an excellent solution to optimize properties through better compatibility between the (hydrophilic) fiber and the polymeric (hydrophobic) matrix. Due to the amphiphilic characteristics of the GO, the functionalization of these fibers makes them optimize the thermal properties of the fibers, thus allowing them to have more possibilities for novel engineering applications.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): uLISSES OLIVEIRA COSTA (Instituto militar de engenharia), lucio fabio cassiano nascimento (instituto militar de engenharia), Julianna Magalhaes Garcia (instituto militar de engenharia), Fabio da Costa Garcia Filho (instituto militar de engenharia), Fernanda Santos da Luz (instituto militar de engenharia), Sergio Neves Monteiro (instituto militar de engenharia), Wagner Anacleto Pinheiro (isntituto militar de engenharia), Wendell Bruno Almeida Bezerra (instituto militar de engenharia)
Abstract:
The objective of this study is to evaluate the morphological and structural modifications of curauá fibers when functionalized with graphene oxide using X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy TECHNIQUES. The functionalization of the curauá fibers was homogeneous on the surface of the fibers, so as to cause a coating that worked as an impediment for the detection of some bands by Raman analysis, also modifying the crystallinity of the fibers without causing mercerization.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): uLISSES OLIVEIRA COSTA (INSTITUTO MILITAR DE ENGENHARIA), Michelle Souza Oliveira (INSTITUTO MILITAR DE ENGENHARIA), Fabio da Costa Garcia Filho (INSTITUTO MILITAR DE ENGENHARIA), Fernanda Santos da Luz (INSTITUTO MILITAR DE ENGENHARIA), Julianna Magalhães Garcia (INSTITUTO MILITAR DE ENGENHARIA), Anderson Oliveira da Silva (INSTITUTO MILITAR DE ENGENHARIA), André Ben-Hur da Silva Figueiredo (INSTITUTO MILITAR DE ENGENHARIA), Lucio Fabio Cassiano Nascimento (INSTITUTO MILITAR DE ENGENHARIA), Sergio Neves Monteiro (INSTITUTO MILITAR DE ENGENHARIA)
Abstract:
The objective of this work was to evaluate the influence of photodegradation by ultraviolet radiation on epoxy matrix composites reinforced with mallow/jute hybrid fabric in the energy absorption capacity against .22mm caliber projectiles. This ballistic efficiency was evaluated by the residual velocity technique. Exposure to UV radiation with both 75 h and 225 h caused changes in composite plates color, and optimized energy absorption capacity at level I events by NIJ 0101.04 standard, absorbing about 93% of the projectile energy, showing to be a technique fairly easy and fast to improve the ballistic properties of composites which in turn are economically more viable than the commonly used synthetic materials.
Plenary
10/2/19, 10:15 AM - 10/2/19, 11:05 AM
Presenter(s): João matheus batista amaro de sousa (universidade federal do ceará )
Abstract:
The pre-salt region is very hostile to the materials used in such environment due to some factors found under the pre-salt layer such as: corrosive gases, oil formation water, high pressures and so on. In order to evaluate only the effect of the oil field formation water on the corrosion resistance of austenitic stainless steels in such environment, two austenitic and two superaustenitic stainless steels were tested in synthetic oil field formation water using the electrochemical technique called step potential. In this technique, potential values (vs Ag/AgCl ) are applied in steps of 50 mV every 1 h until a current of 1 mA was achieved. The results showed that the common austenitic stainless steels are not suitable for the use in chloride-containing environment as the one found in the pre-salt region. They exhibited pitting corrosion. The superaustenitic stainless steels tested exhibited a good corrosion resistance in this medium and can be a solution for the use under some pre-salt conditions.
Closing
10/2/19, 10:20 AM - 10/2/19, 10:35 AM
Presenter(s): HATCH CISDI
Abstract:
Closing
10/2/19, 10:45 AM - 10/2/19, 11:00 AM
Presenter(s): WHITE MARTINS
Abstract:
Plenary
10/2/19, 11:05 AM - 10/2/19, 11:30 AM
Presenter(s): EDO ENGEL (DANIELI CORUS), ROB Van Opbergen (DANIELI CORUS)
Abstract:
The highly dynamic economic climate of recent years has tightened the operating envelope for steel producers world-wide. Steel producers continue to experience immense pressure to respond quickly to changing circumstances and the focus has shifted towards efficiency improvement and maximizing flexibility in operations. The ability to safely stop, restart and ramp-up production facilities has become essential. Establishing this level of flexibility, without sacrificing efficiency, requires sound process control, fit-for-purpose process management practices and solid know-how and experience regarding special situations in blast furnace ironmaking operations. The same business environment that demands this increased flexibility has made it increasingly difficult for steel producers to sustain sufficient knowledge about these situations. While many experienced, senior operational staff have retired, a new generation of ironmaking specialists has acquired its hands-on experience over more recent decades, during which these process situations have been much less frequent than before. Over the past 10-15 years, the requirement in the industry for external operational support during e.g. blast furnace blow–downs, salamander tapping and restarts after planned and especially unplanned stops, has become increasingly frequent. This article presents a number of these cases from a process management perspective as well as with regard to project organization and optimized cooperation between internal and external teams of experts.
Plenary
10/2/19, 11:05 AM - 10/2/19, 11:30 AM
Presenter(s): MARIA RITA OLIVEIRA REBOUÇAS (arcelormittal), luciano henrique andrade de resende (arcelormittal)
Abstract:
Control Monitoring is a process implemented by the Governance, Risk and Compliance department to prepare and verify high volume of data. Usually it is a manual activity and depends on a crosscheck regarding different database, which makes the process even more complex, impacting directly in the frequency of the control check. The objective of the project was to implement a tool and a methodology that was able to automate this process, making it continuous and efficient even when working with a high volume of data from different database and returning an standardized output. After analyzing tools available in the market and doing some PoC (Proof of concept), the tool and the working model to be applied was defined. The result was the implementation of a Continuous Control Monitoring (CCM) that brings: productivity gain, by making it possible to have automated controls; efficiency gain, by making it possible to perform the test in 100% of the data base, without need of making samples; an increase in the assertiveness, due to the reduction of human mistakes from manual activities; besides financial return and risk mitigation.
Plenary
10/2/19, 11:05 AM - 10/2/19, 11:30 AM
Presenter(s): THAIS PEREIRA DIAS GUSMÃO (ECOLAB - NALCO)
Abstract:
technical and commercial viability study of remediation of eutrophicated pond by cyanobacteria and algae, reuse in Utildiades system and operational improvement through analytical and physico-chemical controls
Plenary
10/2/19, 11:05 AM - 10/2/19, 11:30 AM
Presenter(s): rodrigo seara martins (usiminas), Leonardo José Silva de Oliveira (usimians), Marcelo Moreira Furst Goncalves (usiminas), Roberto Parreiras Tavares (UFMG)
Abstract:
Mold powders are in continuous development to allow the continuous casting process to manufacture products with high surface quality. However, the selection and evaluation of the industrial performance of this raw material is not easy because it involves the simultaneous knowledge of its different properties. In this sense, since properly measured, the mold powder consumption can be an useful tool to evaluate the operational stability. Thus, a system was developed to quantify the specific consumption of the mold powders in the mold to later correlate it with events that may lead to deviations of the surface quality of the slab.
Plenary
10/2/19, 11:05 AM - 10/2/19, 11:30 AM
Presenter(s): alberto eloy anduze nogueira (Instituto federal de são paulo polo itaquaquecetuba)
Abstract:
This work studies the effect of liquidus temperature of the slag in the process of iron carburation in self-reducing pellets. Analyzes of the samples obtained by optical microscope, SEM, EDS and LECO were performed. The results showed that the pellets without slag and with liquidium low temperature slag presented a good carburation and coalescation of the metallic phase, in which the slag contained carbide was smaller and both formed a single iron nodule. The pellet with liquidus high temperature slag presented a lower carburation of the iron, among the three tests, and an inefficient coalescence, obtaining as small products iron nodules agglomerated together with the slag. Possibly this is because the slag forming oxides remained in the solid state, forming a physical barrier that made carburation and coalescence difficult.
Plenary
10/2/19, 11:05 AM - 10/2/19, 11:30 AM
Presenter(s): JOÃO FILIPE CAVALCANTI LEAL (CSP - COMPANHIA SIDERÚRGICA DO PECÉM), ROBSON LUIZ ALVES DA SILVA (CSP - COMPANHIA SIDERÚRGICA DO PECÉM), HILDER CALDAS FERREIRA (CSP - COMPANHIA SIDERÚRGICA DO PECÉM), RICARDO EMÍLIO fERREIRA qUEVEDO nOGUEIRA (UFC - uNIVERSIDADE FEDERAL DO CEARÁ), josé marcos sasaki (ufc - universidade federal do ceará)
Abstract:
Refractories, materials used in furnace linings and industrial equipment, are directly or indirectly, positively or negatively, associated with range of environmental problems. When discussing the influence of refractories on the environment, one should consider: aspects related to the global environment, local environment, work environment and the generation of waste. Refractory wastes are historically disposed of as waste in industrial landfills. However, some of the refractory materials used have the potential to be recycled, contributing to environmental and economic sustainability. The addition of recycled aggregates of system Al2O3-SiC on refractory castables of the Al2O3-SiC-C system were evaluated for the development of refractory recycling technology after use. In general, the results of the dynamic slag test indicated the potential of the use of recycled aggregates of charging ladle, torpedo ladle car and slide gate plates.
Plenary
10/2/19, 11:05 AM - 10/2/19, 11:30 AM
Presenter(s): hiago antunes amador de oliveira (university of utah), aaron samuel young (University of Utah), william pratt rogers (university of utah)
Abstract:
Low commodity prices and lack of new high-grade deposits are pushing the mining industry for innovation. Lean mining has been vastly discussed in the past decades as a way to continuously improve mining efficiency. Although very theoretical, lean mining presents a set of new solutions enabled by the digital transformation that the mining industry is going through. This paper proposes a framework for a short interval control system with the purpose to allow timely responses by front line supervisors upon operational deviations. In the first part, the author briefly reviews concepts of short-range planning and lean mining. Then, the materials and methods used for the development of the short interval control system are discussed. Finally, alpha trial results are presented, and next steps discussed.
Plenary
10/2/19, 11:05 AM - 10/2/19, 11:30 AM
Presenter(s): HERI CRISTINE NAKAMURA (POLITÉCNICA - USP)
Abstract:
The aluminum production through the Hall-Héroult process uses alumina or aluminum oxide. The alumina and silica contents determinate the bauxite economical feasibility. However, there are other important properties, the total organic, which determinate the amount of sodium carbonate on the liquor. Alumina refineries with high organics content, needs to handle problems related with sodium carbonate, such as losses on yield and quality. The calcium carbonate conversion into calcium carbonate solution through the reaction with calcium hydroxide. It is possible to find a good amount of data about the sodium carbonate effect using laboratory tests, but there a few papers using data extract from the alumina plants. This work was based on the analysis of samples over the years in an alumina refinery through potentiometric titulation, FRX and breakpoint tests. The study confirmed the sodium carbonate impact on bauxite breakpoint and CaO(%) content on the aluminium oxide.
Plenary
10/2/19, 11:05 AM - 10/2/19, 11:30 AM
Presenter(s): Joao Guilherme Carvalho Costa (Primetals Technologies Brazil)
Abstract:
Primetals Technologies has successfully upgraded the hydrostatic oil film bearings in a Tandem Cold Mill to achieve a specified higher force capacity in a cost effective manner by introducing custom dual pad bushings while at the same time retaining the existing hydrostatic pump and supply system
Plenary
10/2/19, 11:05 AM - 10/2/19, 11:30 AM
Presenter(s): Aparecida Silva Magalhães (Universidade federal de ouro preto), Charles Henrique Xavier Morais Magalhães (UNIVERSIDADE FEDERAL DE OURO PRETO), Milton Sergio Fernandes de Lima (Instituto de Estudos Avançados ), Leonardo Godefroid (Universidade federal de ouro preto), Geraldo Lúcio de Faria (UNIVERSIDADE FEDERAL DE OURO PRETO)
Abstract:
The effect of laser welding and subsequent post-weld heat treatment at different temperatures for 10 minutes on the microstructure of the base metal and melted zone of a duplex stainless steel UNS S32304 was investigated. Although laser welding produces a narrow weld bead and a small heat affected zone, when applied in the duplex, it may produces undesirable effects on the microstructure, such as primary phase unbalance and chromium nitrides precipitation. The obtained results showed that the interlamellar spacing in the base metal, as well as the austenite fraction in the melted zone, increased with the temperature increase (850ºC -1150ºC). In welded joints, post-weld heat treatments significantly increased the fraction of secondary austenite in relation to the only welded sample. The most favorable temperature for the microstructural adjustment of welded joints was 1150ºC, because in this condition a great microstructure refinement and a greater fraction of reformed austenite at melted zone were observed.
Plenary
10/2/19, 11:05 AM - 10/2/19, 11:30 AM
Presenter(s): raffaele alves paranhos (companhia siderúrgica nacional)
Abstract:
Corrosion protection in uncoated carbon steels is essential in steelmaking processes, this protection can be through the chemical composition of the material adding components such as chromium and nickel or also applying a surface protection after the final product. This is a continuous challenge, since it must be well standardized to prevent the steel from getting into the final customer's corrosion process and also does not compromise its internal overconforming processes during its application. The objective of the work was to evaluate this surface protection through electrochemical techniques comparing different layers of protective industrial used. During the development, physical chemical tests, accelerated tests (Salt spray), open circuit potential and electrochemical impedance were carried out. With the laboratory results, we can identify the corrosion resistance for each layer of oil applied to the plate, which can be useful for prioritizing packaging in each segment of the production process and also creating parameters for homologation of new suppliers of industrial protectives
Plenary
10/2/19, 11:05 AM - 10/2/19, 11:30 AM
Presenter(s): Alexander de Oliveira Botelho (ArcelorMittal Tubarão), Vinícius Antonio Ramos Pin (ArcelorMittal Tubarão), Daniel Cruz Cavalieri (Instituto Federal do Espírito Santo), Gustavo Maia de Almeida (Instituto Federal do Espírito Santo), Paulo Rodrigues dos Santos Junior (ArcelorMittal Tubarão)
Abstract:
The concern with grinding results proper analysis of different grinded roll types at roll shop area is of great importance for the rolling process. Its correct and efficient classification represents a cost reduction and contributes to the stability / continuity of the coil production process. Currently, at ArcelorMittal Tubarão, the interpretation of these results as well as its classification is performed manually by grinder operators working on a shift system in the operating pulpit, based on data generated at the end of the grinding process by the so-called grinding machines. This article shows the development and application of an intelligence system based on Fuzzy Logic. This system aims to create an automatic classifier for the evaluation of grinding results as an operational guide.
Forum
10/2/19, 11:05 AM - 10/2/19, 11:55 AM
Presenter(s): Tobias Stefan – Outotec
Abstract:
Business Rounds
10/2/19, 11:05 AM - 10/2/19, 12:45 PM
Presenter(s): Coordinator: William Francisco Leite – General logistics manager at Usiminas; Moderator: Leonardo Almeida Zenóbio – Executive logistics director at Usiminas;
Abstract:
HR Rounds
10/2/19, 11:05 AM - 10/2/19, 12:45 PM
Presenter(s): - Arcelormittal; - Ternium; - Vallourec; - Usiminas;
Abstract:
Plenary
10/2/19, 11:30 AM - 10/2/19, 11:55 AM
Presenter(s): Eustaquio Vieira Junior (Ternium Brasil LTDA)
Abstract:
The Ternium Brasil Blast Furnace#2, in Rio de Janeiro, started to operate in 16 of December, 2010. In this campaign happened, cast iron stave displacement and deformation in copper staves called “banana effect”, generating the lost capacity of refrigeration of these cooling system components. After the analyzes were executed several actions to recover and preservation the Blast Furnace#2, and they also were extended for Baslt Furnace#1. Among the Blast Furnace#2 preservation actions was established that must be replaced the damaged staves and shell sectors that presented cracks and deformations, consequently the lost mechanical properties, directing to eliminate the Blast Furnace#2 operation interruptions to repair specific regions and decreased the operations instability caused per variation on hot staves surface. This paper presents the used technique details, the materials selection and the operational preparations that ensure the Blast Furnace#2 good performance before and after the staves replaced, and the results shows that this activity is viable of technical and economic point of view.
Plenary
10/2/19, 11:30 AM - 10/2/19, 11:55 AM
Presenter(s): CLAUDIO MAGNO DO CARMO (TSA TEC DE SIST DE AUTOMACAO SA)
Abstract:
The operational routine and its validation and monitoring processes are already consolidated in the Information Technology (IT) environment. In the Automation Technology (AT) environment we are slowly advancing, despite the great similarity in several processes, due to the difficulties of adapting the controls mainly regarding the response times and performance of the teams. While IT works to implement the tripod formed by confidentiality (security), integrity (data accuracy) and availability, rigorously in this sequence of priorities (CIA), AT seeks to meet production needs and prioritizes availability (AIC). Hence the initial conflict between models: immediate demand or detailed planning of activities within IT quality standards, but without impacting operational objectives. It's all a matter of vision and especially process management! What are the common guidelines? What are the similar processes? Finding affinity points, aligned with managers' expectations, but focusing on availability, without losing data integrity and reliability is the challenge of this work.
Round Table
10/2/19, 11:30 AM - 10/2/19, 11:55 AM
Presenter(s):
Abstract:
Plenary
10/2/19, 11:30 AM - 10/2/19, 11:55 AM
Presenter(s): Caio nogueira araújo diniz (ternium brasil)
Abstract:
Mold flux plays a significant role in quality during the continuous casting process. Mould powders are synthetic slags used to lubricate the mould during continuous casting of steel. For this to occur, the mould powder has the following functions: chemical and thermal insulation of steel, absorption of non-metallic inclusions from steel, lubrication of the mold and control of heat transfer between the steel and the mold. The performance of each function is related to the chemical and physical properties of the mould powder, which are functions of its chemical composition, and besides its chemical composition also its mineral composition should also be considered, as it affects its melting rate. In order to ensure efficient and high quality production during an ultra-low carbon casting, mold fluxes A and B were investigated according different physico-chemical properties. Several laboratories experiments were carried out to compare the performance of mold fluxes A and B targeting to avoid slag entrapment: evaluation of melting and fluidity behavior, chemical composition, viscosity and temperatures and statistical tests were conducted in order to characterize heat flux and frictional work during casting. The preliminary industrial trials, performed at Ternium Brasil were accomplished aiming to analyse its behaviour during continuous casting operation regarding some operational aspects and to provide information about its influence on the superficial quality of the steel. The results showed that by increasing mould fluxes viscosity, the mold powder consumption became lower leading to higher frictional work and lower heat flux in the mold. However, the slag layer behavior showed that despite the increased frictional force in the mold, the slag thickness was adequate and there were no reports of surface defects during use of the higher viscosity mold flux.
Plenary
10/2/19, 11:30 AM - 10/2/19, 11:55 AM
Presenter(s): raquel de souza correa (Ternium/ufmg), Daniel Augusto Godinho de Carvalho (TERNIUM), bruno suveges cerchiari (ternium), Joyce christine ribeiro (ternium)
Abstract:
The control of the hydrogen’s content contained in steels is vital for the operation of the steel plant, because this element can be responsible for accidents and negatively affect the mechanical properties of the steel. Therefore, prediction of the hydrogen content through mathematical modeling is of great interest of the industry. Due to the complex relationships between hydrogen content and addition of materials made in the BOF during different phases that can cause hydrogen incorporation in the bath, the use of artificial neural networks (ANN) has proved to be a more efficient computational tool to attain this prediction than multiple linear regression models because it has the ability to relate non-linear variables and due to their learning capacity.
Plenary
10/2/19, 11:30 AM - 10/2/19, 11:55 AM
Presenter(s): BRUNO DEVES FLORES (UNIVERSIDADE FEDERAL DO RIO GRANDE DO SU)
Abstract:
The replacement of fossil fuels by charcoal in cokemaking is one of the alternatives to mitigate CO2 emissions in the steel industry. However, the addition of charcoal in cokemaking has severe limitations, which are mainly associated with its high reactivity to CO2. Therefore, the present study aimed to investigate alternatives to reduce charcoal reactivity. The effects of pyrolysis temperature, demineralization and coal tar impregnation were investigated. The results showed that the increase of pyrolysis temperature decrease charcoal reactivity. This trend was also observed by removing the inorganic components of the charcoal and when impregnating its structure with coal tar. The combination of thermal treatments, demineralization and impregnation with coal tar resulted in charcoal reactivity reduction up to 6 times.
Plenary
10/2/19, 11:30 AM - 10/2/19, 11:55 AM
Presenter(s): JOMER LUÍS TAVARES JANUÁRIO (VALE SA)
Abstract:
The world is getting more and more dynamic. Nevertheless, mining companies need results in the short term, but without abandoning the plan that seeks their long-term survival. The technological advancements, the uncertainties, the complexities and ambiguities of the 21st century affect the planning process. This paper presents an analysis of the influence of components of the current world on the production planning process in the long-term horizon, facing the challenge of integrating primary activities of the mineral value chain and analyzes the perception of professionals working in the sector on aspects of lean thinking. The methodology included a preliminary analysis, followed by data collection through research with a multidisciplinary group. The results presented show how it is important replacing the linear model of the traditional process with a more flexible approach, with multi-scenario analysis, since the solutions of the century XX are no longer enough to meet the challenges of the 21st century.
Plenary
10/2/19, 11:30 AM - 10/2/19, 11:55 AM
Presenter(s): Késsius Bortolan Menezes ()
Abstract:
With the start-up of the Minas-Rio system, Anglo American, in Conceição do Mato Dentro, MG, in 2014, a methodology was also implemented and certified to perform the tests to obtain the results of TML (Transportable Moisture Limit). Such a parameter provides the maximum moisture content contained in the material that could be transported without the risk of the cargo liquefaction process, which could lead to incidents such as the tipping of ships carrying iron ore concentrate in bulk on the deep water. This means that when loading a ship, the moisture content of the material to be transported should not be higher than the TML reference value, obtained in a physical test and intrinsic to the material. Should this occur the charging may be rejected. From 2014 a downward trend was observed for this reference parameter in the Minas-Rio system, with results approaching the moisture of the filtered product, bringing risks to the operation of the project. In this way, an investigation of the possible causes for understanding this downward trend was required.
Plenary
10/2/19, 11:30 AM - 10/2/19, 11:55 AM
Presenter(s): Giussepp Kelson Castro Morais (Arcelormittal Tubarão / Especialista em Confiabilidade de Equipamento), Shaney Gonçalves Mileipe (Arcelormittal Tubarão / Especialista de Manutenção e Gestão de Ativos )
Abstract:
In the current economic environment, with high competition in the steel market and a narrow profit margin, companies in the industry need to adapt to this new scenario, knowing where to invest so that they can maximize the value of their assets. Based on this context, the objective of this work is to present the application of a method of life cycle cost analysis in a Cold Water Center, through the use of the RAM analysis based on statistical reliability curves, generated through quantitative historical data for realization of future projections and with a cost decomposition structure that defined the specific phases of the life cycle and the relevant cost categories, aiming to compare and identify the best alternative of projects that meets the cooling system of the gas treatment plant of a Coke plant, in line with the company's strategic objectives. It was possible to identify in each alternative studied the reliability, availability and maintainability, in addition to the annual equivalent cost (EAC) that supported in the decision making
Plenary
10/2/19, 11:30 AM - 10/2/19, 11:55 AM
Presenter(s): SERGIO CORDERO CALVIMONTES (Universidade Federal DO RIO DE JANEIRO)
Abstract:
Using a problem simplification process involving Electric Resistance Welding, a mathematical model is created and implemented on the Octave® platform, in order to study the electro-thermic behavior of the system in front of interface impedance variations. An effective domain of random values of that impedance is mathematically described, and some potential simplifications are inferred.
Plenary
10/2/19, 11:30 AM - 10/2/19, 11:55 AM
Presenter(s): mAURO ANDRÉS CERRA FLOREZ (uNIVERSIDADE federal do ceará), ana beatriz ferreira sousa (universidade federal do ceará), Stephany Aparecida Santos da Mata (UNIVERSIDADE FEDERAL DO CEARÁ), Moisés Bastos Neto (universidade federal do ceará), Marcelo José Gomes da Silva (universidade federal do ceará)
Abstract:
The aging treatment in maraging steels is very important for to acquire excellent mechanical properties, reasons of their applications in several types of industries. In nuclear industry, the initial motivation of this investiation, maraging steels are used in ultra-centrifugal parts for uranium enrichment. In view of this, this study aimed to producing, during the heat treatment, an oxide film that behaves as a protective layer for maraging steel against atmospheric attack. Aging was carried out in a controlled atmosphere furnace (a combination of nitrogen and water vapor). Due to the thermodynamic and kinetic conditions, these gases reacted with the steel, producing an oxide on the surface. For the accomplishment of the experiment it was necessary to carry out the metallographic study of the samples. By means of the techniques of Scanning Electron Microscopy (SEM), X-ray Dispersive Energy Spectroscopy (EDS) and X-ray Diffraction (DRX), the film was characterized as a compact adherent oxide with iron spinel microstructure with nickel and cobalt.
Plenary
10/2/19, 11:30 AM - 10/2/19, 11:55 AM
Presenter(s): Gabriel duarte de andrade (Arcelormittal tubarão)
Abstract:
In the sinter process, the sinter machine speed should be controlled in order to keep burn-through point in a range that aims a high productivity level. This article presents a physical model describing the movement of the burning zone and the control model implemented in level 2 automation system from ArcelorMittal Tubarão. The sinter machine speed control was proposed to keep the position of the burn-through point near to defined setpoint. Over the years, operational conditions have changed due to ore quality deviation from raw mix. In this context, the control model was evaluated and has shown good results, allowing operation controls sinter process without delaying the decision-making process.
Plenary
10/2/19, 11:30 AM - 10/2/19, 12:20 PM
Presenter(s): Sara carvalho zago (Universidade de São Paulo), fernando Vernilli (Universidade de São Paulo)
Abstract:
The natural aggregates of the construction industry are the most exploited mineral inputs in the world and their demand expands with increasing infrastructure. To ensure the conservation of natural aggregates, it is imperative to study alternative aggregates, such as wastes generated by steel mills. LD mill slag is the main residue of the steel refining process. In the context of the excessive extraction of natural aggregates, the use of steel residues can be justified due to its crystalline structure of high resistance to abrasion and hardness. Thus, in this work the characteristics of LD steel slag for the use as concrete aggregate were evaluated, as well as the effect generated in Portland cement concrete by the use of LD slag in substitution of natural sand in proportions 0%; 25%; 50% and 75% by weight. The slag concretes studied showed significant improvements in the compressive strength, similar to the reference behavior in the tensile strength, and a significant reduction in the modulus of elasticity as a function of the porous structure presented by the slag. As well as the aggregates presented expansive behavior in alkaline cure.
Plenary
10/2/19, 11:55 AM - 10/2/19, 12:20 PM
Presenter(s): Tamoghna MITRA (PAUL WURTH S.A.), Klaus-Peter KINZEL (PAUL WURTH S.A.), Björn RÖSNER (PAUL WURTH S.A.), Horst KAPPES (PAUL WURTH S.A.), Philipp BERMES (PAUL WURTH S.A.), Lorenzo MICHELETTI (PAUL WURTH ITALIA S.p.A.), Cristiano CASTAGNOLA (PAUL WURTH ITALIA S.P.A.), André Cabral de Oliveira (Paul Wurth do Brasil)
Abstract:
Blast furnaces are widely employed today for iron production all around the world, with a total production of around 1.2 billion tons per year. Its operating principle, which relies on usage of coke to reduce the ore, to ensure the permeability in the reaction vessel, to maintain its flexibility of operation and acceptability for varying qualities of iron ores. The blast furnace route is widely considered as the most economic and efficient route of iron production, however it is based on fossil energy carriers The blast furnace route has undergone significant developments in terms of energy efficiency in the last decades, which led to a substantial reduction in the use of fossil reduction materials. Being an energy intensive process, competitiveness and cost saving in the blast furnace plant was always strongly related to the saving of energy and hence reduction of CO2 emissions. In addition to this, EU emissions trading system (EU ETS) as a cornerstone of the EU's policy in response to climate change has set new “challenges” for iron production in Europe. Paul Wurth has always been deeply involved in the development of energy saving technologies for blast furnaces. In the following a review of energy saving achievements developed in the last decades will be presented and the potential of available CO2 saving technologies will be summarized. Additionally, an outlook about the potential of future technologies, concepts and their impact on the blast furnace and the steel plant’s energy balance will be discussed. Finally, the replacement of carbon by hydrogen as reduction agent in the steel plant will be reviewed, with special focus on a comparison of costs and incentives.
Plenary
10/2/19, 11:55 AM - 10/2/19, 12:20 PM
Presenter(s): ANTONIO CESAR DE ARAUJO FREITAS (TSA – Tecnologia de Sistemas de Automação SA), Lucas Machado Barbosa de Faria (TSA – TECNOLOGIA DE SISTEMAS DE AUTOMAÇÃO SA)
Abstract:
This paper describes the operation of the automatic system developed to perform the positioning of wagons during the replacement of wheelset, which operates in Railway Maintenance Center of Vale in São Luís do Maranhão/Brazil. It is a big challenge in the maintenance routine to execute with precision of centimeters the positioning of compositions with up to 110 wagons, keeping the gaps between wagons. For surpass this challenge it has been developed an automatic system for positioning wagon compositions. It uses laser-based measurement with centimeter precision and continuously updates the distance between a wheel and the correct stop point, thus enabling the positioning of the wheelset.
Plenary
10/2/19, 11:55 AM - 10/2/19, 12:20 PM
Presenter(s): luiz gonzaga peixoto (white martins gases industriais ltda), andrea torres falcon (white martins gases industriais ltda)
Abstract:
There are a few ways to impact the capacity of a reciprocating compressor, by altering suction and discharge pressure and recirculation. By reducing the pressure drop in the section before the compressor it is possible to provide a higher suction pressure and subsequently achieve a higher compressor flow rate. The increase in the suction pressure while maintaining the discharge pressure reduced the demanded compressor Head. When considering oxygen compressors it is necessary to cautiously evaluate the safety norms and parameters due to the risk of explosions and fires due to high oxygen velocity
Plenary
10/2/19, 11:55 AM - 10/2/19, 12:20 PM
Presenter(s): Alexandre de Freitas gomes de mendonça (Usiminas s.A.), Rodrigo Seara Martins (Usiminas S.A.), Rodrigo Madrona Dias (USIMINAS S.A.), Leonardo José Silva de Oliveira (USIMINAS S.A.)
Abstract:
In continuous casting, the mold powder is responsible for the formation of a liquid slag in the mold which will form a slag film between the copper plate and the solidified shell. The main functions of the film are to lubricate and moderate the thermal flow in the mold. In particular, for steels with a tendency to stick, a slag is proposed to potentiate more intense thermal extraction in relation to the slag applied in steels with tendency to depression. The basicity index of the mold powder is a parameter that affects directly the heat resistance of the slag film and consequently, the thickness of the solidified shell at the outlet of the mold. With the investigative work of the best practices, the basicity index was reduced in 16.8% of the mold powder applied in ultra low carbon steel, and thus it was possible to increase up to 10.1% in the heat flux in the mold. In addition to the increase in the thickness of the solidified skin, this result also influenced the stability of the mold steel level and the slab surface quality.
Plenary
10/2/19, 11:55 AM - 10/2/19, 12:20 PM
Presenter(s): jULIO aNÍBAL MORALES pEREIRA (uNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL-ufrgs), Vinicius Cardoso da Rocha (uNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL )
Abstract:
Considerable efforts have been made to increase the performance of metallurgical operations and the quality of the steel. In this sense, the role of slag in the processing of steel has become very important. With the objective of optimizing slag, numerous studies have been conducted to better understand the effect of chemical composition and other properties of slag on viscosity, as well as its influence on the control of inclusionary cleanliness. It has also been observed an evolution of the experimental laboratory techniques that are used for the structural investigation and measurements of the physical properties of the slag, being fundamental for experimental studies and even extrapolations for the practical environment of the steel industry.
Plenary
10/2/19, 11:55 AM - 10/2/19, 12:20 PM
Presenter(s): IVAN MAURICIO DAZA PRADA (POLI-USP/IPT), fLÁVIO BENEDUCE NETO (POLI-USP), TIAGO RAMOS RIBEIRO (POLI-USP/IPT), Fabricio Rossi Marques Matias (ipt)
Abstract:
Kinetics of iron reduction process contained in Brazilian monazitic concentrate has been investigated in this study. Charcoal and petroleum coke were used as reducing agents under isothermal condition. The reduction experiments of monazite concentrate-reductant mixture have been performed at varying temperatures ranging between 973-1273K for 180 minutes. The materials are characterized by representative techniques like XRF, XRD and SEM, in order to evaluate the particles morphology, ore composition and identify the main phase of iron oxide. The isothermal kinetic study has been performed considering the loss of oxygen from the monazite iron oxides calculated from the thermogravimetric. The results showed that charcoal is a better reducer than petroleum coke and that, in both cases, the reaction follows the Ginstling-Brounshtein model for mixed control. The corresponding activation energies using Arrhenius equation are evaluated as 157.68 and 266.95 kJ/mole, for mixtures with charcoal and petroleum coke respectively
Plenary
10/2/19, 11:55 AM - 10/2/19, 12:20 PM
Presenter(s): BRAULO SILVANO HEMÉTRIO (usiminas), RICARDO ISRAEL DO COUTO (usiminas), ROSELAINE GONCALVES MAGALHAES (usiminas)
Abstract:
The refractory industry and the steel industry have developed versatile and automated methods for the refractories repair and installation in concrete molding techniques traditional replacement. Following this trend, Usiminas has directed efforts to improve torpedo ladle cars performance. Among several practices, it is worth mentioning the application by shotcrete, which consists in designing a concrete layer on brick surface, acting as a sacrificial refractory and contributing to wear reduction. In order to improve performance indicators, the repair practice was adjusted to coincide recoating layer wear with the stop intervals, thus attenuating the bricks degradation. This work is presented and discussed actions that guided the a new concrete development, the shotcrete thickness control and a protection layer anchorage system. Significant results were obtained in relation to refractories specific consumption profile and reduction the bricks consumption.
Plenary
10/2/19, 11:55 AM - 10/2/19, 12:20 PM
Presenter(s): BENITO BARBAbELA E SILVA (corem)
Abstract:
Pellets market challenging scenario has stimulated pelletizing experts to pursue innovative alternatives to process development in order to increase pellets competitiveness vis-à-vis sinter. When it comes to indurating process, pelletizing productivity is still limited and its OPEX inflated by the lower input of carbon into mixes due to quality impairment caused by magnetite formation in pellets core. This obstacle led to the rethinking of carbon distribution strategy within the green balls. To achieve such purposes, COREM through its precompetitive research program dedicated to its members, has proposed the layered pellets®, a two-stage balling technology. Balling in disc and pot-grate tests in COREM’s pilot plant were carried out to proof the concept, support the arising technology and evaluate its potential. According to first results, while CCS strongly improved, tumble and abrasion indexes as well dynamic LTD must be further investigated. Tests on four classes of equivalent carbon content pellets to evaluate layering strategy gave very good perspectives concerning the increase of productivity, and the reduction of fuel consumption and GHG emissions.
Plenary
10/2/19, 11:55 AM - 10/2/19, 12:20 PM
Presenter(s): Rudi César Comiotto Modena (UFRGS - CAMPUS DO VALE), Gabriel de Castro Moreira (UFRGS - CAMPUS DO VALE), Diego Machado Marques (UFRGS - CAMPUS DO VALE), João Felipe Coimbra Leite Costa (UFRGS - CAMPUS DO VALE)
Abstract:
The definition of geological/geostatistical domains is the first step in building a mineral resource model. A suitable division for these domains requires some prior knowledge about the deposit geology and can be supported by a careful statistical analysis. It is crucial that data with similar characteristics are grouped together, to avoid the mixing of statistical populations, defining the so-called stationary domains. In order to assist in this definition, two unsupervised clustering algorithms were applied: Otsu and K-means. The first one is widely used in image segmentation and it is based on the exhaustive search of the data to determine the best threshold for separating them. K-means is one of the most used techniques in machine learning, and it is based on the iterative analysis of the statistical distribution. Clustering algorithms may present some shortcomings when applied to geological data, since they are based on pure statistical analysis, not considering spatial distribution or data location. Choosing the most appropriate number of domains can also be challenging. Some methods for defining the best number of groups are presented, based on the analysis of variances between/inside groups, supported by indicators variography in order to verify this definition.
Plenary
10/2/19, 11:55 AM - 10/2/19, 12:20 PM
Presenter(s): Késsius Bortolan Menezes (Anglo American)
Abstract:
Sampling and its representativeness is of significant importance in process control and decision making in the mineral sector. In this way, the present work seeks to compare different methodologies for the sampling of the iron ore from Anglo American. Through a sample of 120 kg, representing the industrial flotation circuit feed, samples obtained by the method of long pile, random sampling and rotary sample divider were analyzed, being the latter adopted by the company. In this case, after sampling, the material obtained through each method was subjected to the same sequence of characterization tests and the difference between the results statistically analyzed. Through such analysis it was observed that the random sampling method showed high values of variability and is therefore considered as unsatisfactory when compared to the other methods tested. In addition, rotary sample divider also showed parameters slightly superior to the long pile method. This study confirms the importance of appropriate sampling systems and procedures systems in the pursuit of reliable results.
Plenary
10/2/19, 11:55 AM - 10/2/19, 12:20 PM
Presenter(s): Marcio da silva nicolay (ABB Ltda.)
Abstract:
This paper discusses the main characteristics of the control systems and maintenance policies currently in use, especially the online predictions, the trends that have been pointed out and offered in the market and the benefits of the integration between the two systems. It presents the practical application of an asset condition diagnosis system (also called asset management system in market practice) integrated with the process control system, the benefits that can be obtained from the process and the gains that were obtained. These gains refer to the process interruption avoidance for equipment problems correction identified in a crusher, vibratory screener and conveyor drum.
Plenary
10/2/19, 11:55 AM - 10/2/19, 12:20 PM
Presenter(s): ETIENE PEREIRA DE ANDRADE (UNIVERSIDADE FEDERAL DE MINAS GERAIS)
Abstract:
Plenary
10/2/19, 11:55 AM - 10/2/19, 12:20 PM
Presenter(s): Cinara Piazzarolo lana (ArcelorMittal Tubarão)
Abstract:
The role of Materials Engineering and the study of Corrosion with its integrated aspects has been increasingly important to use methods, materials and techniques to support the management decision-making of asset management, structural integrity of industrial plants and cost evaluations benefit of applications. In this context, this study demonstrated through laboratory electrochemical tests, using as electrolyte the solution collected in industrial plant object of the this study, the comparative relation of some steels in order to conclude about the best application in the environment of these operating plants. The understanding of the corrosion rates and the comparative behavior between the studied steel - ASTM A36, and those proposed for the extended life of the structures: ASTM A588 and ASTM A36 hot-dip galvanized steel- prove to be of great utility for the similar industrial application submitted to processes with the aggressive agents identified
Plenary
10/2/19, 11:55 AM - 10/2/19, 12:20 PM
Presenter(s): Emmanuel Marchal (Cassotis consulting)
Abstract:
The definition of the chemical specification at multiple steps of the steelmaking process is very common in the industry. Among all elements and compounds, the Sulphur content has a special control over several stages, from the coal blend to the final products. Coke, iron and steelmaking specialists usually agree on a static specification for each intermediate product according to their local operation capacity and production cost. However, local decisions have major impacts on the whole production chain and many global factors should be considered in order to make the best decision. In this study, we will exemplify focusing on Sulphur content concepts and techniques that could be applied to many decisions in an integrated carbon steel plant. The variation of coal and coke prices, the desulphurization cost and time, the processes operating points, the hot metal rate at converters, prices and demands of low and ultra-low Sulphur steel grades are some of the integrated factors that are usually disregarded during the specification process. Mathematical modeling presents itself as a proper option into dealing with all the complexity that emerges from integrating all these processes' trade-offs and decisions. This study presents the results of a mathematical model that encompasses economic, thermal, chemical, and mass balances, physical quality of materials and productivity constraints of all processes of a hypothetical integrated carbon steel plant. It optimizes the iron and steelmaking process on a global and unique objective, dynamically defining targets for product quality to achieve the lowest steel production cost. This study details multiple market-plant scenarios in order to compare economic and operating results of a static vs dynamic specification practice.
Plenary
10/2/19, 12:20 PM - 10/2/19, 12:45 PM
Presenter(s): hamid ghorbani (Hatch)
Abstract:
Cooling staves in blast furnaces are used to minimize the process heat loads on steel shell and refractory system. Copper staves are exposed to significant fluctuating thermal loads which may lead to premature stave failures due to cracks, water leakage, bending, abrasion and resultant wear. In this paper, an assessment methodology is presented to evaluate the effect of thermal cycling on copper staves including bending, fatigue and thermal ratcheting. This approach incorporates temperature-dependent copper properties including creep and plasticity to more accurately capture inelastic deformations, damage and fatigue in staves under transient and cyclic thermal loading conditions. Root cause failure assessment and improvements to copper stave design can be assessed using the presented methodology.
Plenary
10/2/19, 12:20 PM - 10/2/19, 12:45 PM
Presenter(s): Roberto Dalmaso (ARcelormittal tubarão), vinícius PEsente BInotte (ARCELORMITTAL TUBARÃO), ALAN AMORIM MARGON (Arcelormittal tubarão), DAVI FIORESE BISSOLI (UFES), Luiz Alberto Moreira AndradE (ARCELORMITTAL TUBARÃO)
Abstract:
The objective of this article is to present ArcelorMittal Tubarão automatic measure system for slab iof slab conditioning area. Previously this job was done manually by the inspectors. This equipment make possible work safety for inspectors and increasing the quality of measurements when eliminate the dispersion of data, other point is about the possible of creation of a historical measurement entire slabs. For the validation of the equipment, it was submitted to a measurement system whose present a good result. At present the system is in operation to statistically analyze its performance in relation to the inspectors.
Plenary
10/2/19, 12:20 PM - 10/2/19, 12:45 PM
Presenter(s): Adriano Gomes de Freitas (Zeppelin System latin America/Universidade Federal do ABC - UFABC), Ricardo Borges dos Santos (ZEPPELIN SYSTEM LATIN AMERICA/UNIVERSIDADE FEDERAL DO ABC - UFABC), Vitor Furlan Oliveira (ZEPPELIN SYSTEM LATIN AMERICA/UNIVERSIDADE FEDERAL DO ABC - UFABC), Yuri Oliveira Lima (ZEPPELIN SYSTEM LATIN AMERICA/UNIVERSIDADE FEDERAL DO ABC - UFABC), Luis Alberto Martinez Riascos (UNIVERSIDADE FEDERAL DO ABC - UFABC)
Abstract:
This project resulting from the collaboration between the company Zeppelin Systems Latin America and the Federal University of ABC aims to evaluate the performance in terms of rate of transport rate and energy consumption of a non-conventional pressure vessel which is a type of solids feeder for pneumatic conveyance developed by the company to operate in dense phase regimen. By means of pneumatic conveyance of calcitic limestone performed at the company's Test Center, it was verified that the new pressure vessel has a specific transport and specific consumption rate comparable to the traditional versions of the equipment.
Plenary
10/2/19, 12:20 PM - 10/2/19, 12:45 PM
Presenter(s): maria carolina campello bezerra campos (Vesuvius )
Abstract:
Casting fluxes are one of the key factors to guarantee a good performance of the continuous casting process. Fluxes are added over the liquid steel in the mold, where carbon in the flux reacts with any air present, to form a reducing atmosphere of CO (g) to protect molten steel from oxidation. Then the oxide components form the sintered layer and they melt to form a liquid flux pool. Liquid slag from the pool infiltrates into the mold/strand channel and lubricates the newly-formed, steel shell. It was very common in the past that the addition of casting flux in the mold was made manually by the continuous casting strand operator, where the addition uniformity would mainly depend on the attention of the Operator in process and the addition standard would change from one operator to another, may causing variability on the continuous casting quality parameters. This paper presents improvement of continuous casting parameters such as, stability of flux thickness and reduction of dust in the continuous casting process, with the use of flux distribution mechanism in two continuous casting machines from two different steel plants.
Plenary
10/2/19, 12:20 PM - 10/2/19, 12:45 PM
Presenter(s): MATHEUS FELIPE DOS SANTOS (UFSCAr)
Abstract:
The energy consumption of steel ladles is closely related to the processing steps during the secondary refinement. Thermal energy from the liquid steel is lost when melting alloying elements, stirring gases or by natural heat transfer mechanisms. The refractory lining is responsible for approximately 70% of those energy losses, which will be dissipated to the environment while the ladle surfaces are being cooled. Carbonfree refractories are microstructurally engineered to reduce the heat transfer in the material due to the lack of carbon (conducting phase) and the presence of lower thermal conductivity phases (i.e. microporous materials). The steel ladle process is a transient cycle that requires enhanced numerical tools to investigate the performance of such materials in specific conditions for each steelmaking shop. These tools were applied to estimate the saving energy potential of Carbonfree refractories in a real case scenario (bottom and metal line) and the results showed a potential of reducing 21% the energy consumption. In-situ trials were also carried out and the reduction in the energy consumption was evaluated by comparing the liquid steel temperature for the different lining configurations. The expected benefits had good agreement with the tool predictions and the efficiency of such materials were validated
Plenary
10/2/19, 12:20 PM - 10/2/19, 12:45 PM
Presenter(s): jean philippe santos gherardi de alencar (vale)
Abstract:
The two main furnaces in the world applied to burn pellets are the travelling grate and the rotary kiln. Although the raw materials to produce the pellets may be similar, these furnaces have their peculiarities, generating pellets with different quality. In this context, the present work investigated two pellets as-produced and after reduction with the aim to compare and correlate the differences imposed by the use of the travelling grate and rotary kiln furnaces. On the one hand, the pellet produced in travelling grate presented a higher porosity, and consequently a higher reducibility, due to the possibility of adding a larger amount of anthracite. On the other hand, the pellet strength is lower as compared to the pellet produced in rotary kiln, not just because of the porosity and cracks, but also due to the better homogenization and finishing touches that the rotary promotes in the pellets. Besides the differences in physical characteristics, a difference in the microstructure after reduction was observed. In the reduction process, the pellet produced in the travelling grate was represented by topochemical model, while the one produced in the rotary kiln was based on the reduction starting by the inner cracks and pores.
Plenary
10/2/19, 12:20 PM - 10/2/19, 12:45 PM
Presenter(s): Roberta Lima de souza costa (UFPA), GEYNA EVELLYN SILVA DE JESUS (UFPA), Alisson clay rios da silva (ufpa), Sérgio neves monteiro (ime), Verônica scarpini candido (ufpa)
Abstract:
The aim of this study was to evaluate the influence of the incorporation of 5 and 10wt % by weight of blast furnace sludge in clay, both from the state of Pará, Brazil. Initially the raw material and the residue benefited the decrease of the particle size. Afterwards they were submitted to FRX, EDS, XRD, TG / DTG, particle size distribution and plasticity and liquidity limits. Test specimens were prepared by uniaxial pressing of 20 MPa for burning in a laboratory furnace, muffle type, at a temperature of 850°C. AA, RLQ and three-point flexural strength were evaluated. The results showed that the blast furnace sludge consists predominantly of iron compounds, which contributes to the reddish placement in the sintered part. The residue presents a granulometry favorable to the addition in clayey mass, without altering the technological properties. Thus, it was concluded that the composition with addition of 10wt % of blast furnace sludge was the one that presented favorable results and required by norms for the manufacture of tiles.
Plenary
10/2/19, 12:20 PM - 10/2/19, 12:45 PM
Presenter(s): rossano augusto pilon nunes (VAle), Maycon Athayde (vale), Luis Henrique Torres Dantas (vale)
Abstract:
The objective of this work is to evaluate the physical quality achieved in the iron ore pellets and the temperature profile in the pellet bed by applying an inversion in the flow during the cooling. The firing of pellets requires a minimum residence time in the sintering temperatures of the hematite grains [1]. The applied concept aims at raising this time to pellets located at the bottom of the bed which would provide an improvement in the physical quality of the product. The tests were carried out in a pot-grate type oven and the samples of fired pellets were divided into three aliquots according to the loading position of the pot termed top, middle and bottom, the pellets were sieved and subjected to physical tests and the compared to conventional indurating flow with the same ores and inputs. It was possible to show an increase of 7 to 8% in the compressive strength of the medium and bottom layers, maintaining the top layer results. The objectives of the research were achieved and the tests will be extended to assess the impacts on the mass and energy balance of the indurating machine and its components.
Plenary
10/2/19, 12:20 PM - 10/2/19, 12:45 PM
Presenter(s): gabriel arthur guieiro (vale s/a), emylle alves leitao (vale s/a), emerson sena balbino (vale s/a), Lucas van melis (vale s/a)
Abstract:
The deployment of autonomous haulage system causes several impacts in mining production chain, being necessary an appropriate change management policy, crucial to observe and gather all the benefits brought by the technology. The change management is also necessary to guarantee the adaptability of the organization in the long term. This paper briefly presents the technology deployed in the autonomous trucks at Vale's iron ore Brucutu mine, the changes that the operation team faces in the adoption of autonomous technology and the required training path to develop new procedures to deal with the sensitivity of the autonomous haulage system, besides the new operational dynamics from a process point of view, with safer, more consistent and more productive operations.
Plenary
10/2/19, 12:20 PM - 10/2/19, 12:45 PM
Presenter(s): elias Fonseca de castro (Anglo american)
Abstract:
The Minas-Rio project of the Anglo American group was designed to produce pellet feed from a low-grade itabirite. The comminution circuit has three HPGR’s and two ball mills. This type of circuit, with HPGR (open circuit) followed by ball milling (closed circuit), is called a hybrid circuit. The literature shows this hybrid circuit as being more energy efficient. The main objective of this work was to evaluate the benefits of using the HPGR in the energy consumption of the grinding and regrinding and the secondary objective was to show the impact of the press on mass recovery of desliming and flotation, in view of a possible higher generation resulting from the pressing of the material. The results obtained in this work showed that the HPGR reduced the specific energy consumption in the comminution stages existing downstream of the press, increased the recovery of the flotation and did not decrease the recovery of the desliming stage
Plenary
10/2/19, 12:20 PM - 10/2/19, 12:45 PM
Presenter(s): Luiz felipe bauri (departamento de engenharia metalúrgica e de materiais, universidade de são paulo), Dany michell andrade centeno (dEPARTAMENTO DE ENGENHARIA METALÚRGICA E DE MATERIAIS, UNIVERSIDADE DE SÃO PAULO), Mariana moreno rodrigues (DEPARTAMENTO DE ENGENHARIA de materiais, UNIVERSIDADE FEDERAL DE SANTA CATARINA CAMPUS BLUMENAU), Luiz henrique dias ALVES (Engenharia Mecânica, Universidade Federal de Juiz de Fora), hélio goldenstein (dEPARTAMENTO DE ENGENHARIA METALÚRGICA E DE MATERIAIS, UNIVERSIDADE DE SÃO PAULO)
Abstract:
The influence of two sets of welding parameters on the microstructural evolution and mechanical properties of eutectoid and hypereutectoid rails during flash butt welding is investigated. It is shown that in the heat-affected zone (HAZ) a gradient microstructure is formed because of a thermal and strain gradient. The pearlite colonies decrease from the welding seam (WS) to the coarse-grained zone. Perlite colonies with proeutectoid ferrite at the prior austenite grain boundary are observed near the WS, while the pearlite presents a partially spheroidization in the region of partial austenitization. Despite the two different sets of welding parameter, tensile tests of samples that include the welding have shown rupture in the region of partial austenitization. The microhardness profile for the two welding conditions is consistent, detailing the valleys of the softened zone and the peaks in the hardened zone adjacent to the weld. Therefore, the results allow to understand the influence of the welding parameters in the steel microstructure, with emphasis on the morphological alterations of perlite.
Plenary
10/2/19, 12:20 PM - 10/2/19, 12:45 PM
Presenter(s): Eron Nadu Santos (Unileste/mg)
Abstract:
This work aims to study the effect of thermal treatments at different temperatures and their consequences on the micro structure of duplex stainless steel 2205. Duplex steels are composed by two structures: ferrite and austenite. These well distributed structures give the steel high resistance to corrosion and mechanical resistance. However, chemical changes in the ferrite and austenite grains caused by the thermal treatments give the steel the appearance of intermetallic phases. The intermetallic phase discussed in this work is the sigma phase, which occurs between 600ºC and 975ºC. Some tests were made to prove the effects of the sigma phase, destructive tensile tests, corrosion tests and metallography. The results obtained in the tensile and corrosion tests presented evidence detrimental to the steel in the range of 600ºC-850ºC. At 1000ºC the harmful sigma phase solubilized and became ferrite and austenite again, but with larger grain size.
Plenary
10/2/19, 12:20 PM - 10/2/19, 12:45 PM
Presenter(s): Reinhold Leitner (Primetals Technologies Austria GmbH)
Abstract:
State-of-the-art automation technology enables digitalization of the continuous casting process that goes far beyond conventional automation of industrial production. Primetals Technologies provides a digital twin that combines an intelligent digital representation of a casting machine as well as the casting process and the slabs, blooms or billets that are produced. It allows metallurgists and process engineers to predict the behavior of the involved complex production process and optimize parameters before using them in real production. New steel grades or production processes can be evaluated off-line without any risks to process stability and product quality. Primetals Technologies installs the digital twin with every new installation of a continuous caster optimization system. This paper describes how the setup and simulation possibilities of the digital twin provide numerous benefits by modelling and simulating the casting process. It allows for example the calculation of material properties according to the actual composition, strand surface temperature profiles and dynamic soft reduction before the final point of solidification. An outstanding feature of the digital twin is the replay functionality provided for various models to analyze and further optimize real production situations. The paper also gives an example how usage of the digital twin optimized production at a customer
Plenary
10/2/19, 2:00 PM - 10/2/19, 2:25 PM
Presenter(s): Bruno Hessel Silva (PPGCEM - ufscar), Bráulio salumão de oliveira (PPGCEM - UFSCAR), Guilherme Zepon (PPGCEM - UFSCAr), Claudemiro Bolfarini (PPGCEM - UFSCar)
Abstract:
The manufacture of automobiles with intense use of aluminum alloys is currently limited due to the difficulty of adapting manufacturing methods used in ferrous alloys for aluminum alloys. However, new technologies, such as refill friction stir spot welding (RFSSW), are being developed to meet this demand. This work aimed to analyze the feasibility of this process for the AA6082-T6 alloy from the economic aspects, mechanical properties, and adaptation in welds with structural adhesive. It was optimized the process parameters through statistical techniques, evaluated by structural characterization, fracture, and thermal analysis. It was observed that RFSSW is a viable technology from standard requirements and economic criteria. However, regarding hybrid welds with the application of structural adhesive, the process presented undesirable mechanical performance. This behavior is associated with the adhesive contamination and the detriment of the diffusion and stirring mechanisms of the process.
Plenary
10/2/19, 2:00 PM - 10/2/19, 2:25 PM
Presenter(s): Joaquim Luiz Monteiro de Barros (Kuttner do Brasil), Fabiana Moreira Costa (Kuttner do Brasil)
Abstract:
The purpose of this paper is to present, in a didactic way and with practical example, the cleaning processes of exhaust gases during the production of iron and steel to comply with environmental standards and the possibility of recovering thermal energy of these gases for increased energy efficiency of steelmaking plants.
Plenary
10/2/19, 2:00 PM - 10/2/19, 2:25 PM
Presenter(s): João Víctor Gomes Guimarães Ananias (Universidade federal de Ouro Preto - UFOP), Weslei Viana Gabriel (Redemat-UFOP), Thiago Araujo Santos de Oliveira (UNIVERSIDADE FEDERAL DE OURO PRETO - UFOP), Salvatore Giuliano Peixoto Tropia de Abreu (UNIVERSIDADE FEDERAL DE OURO PRETO - UFOP), Itavahn Alves da Silva (UNIVERSIDADE FEDERAL DE OURO PRETO - UFOP), Johne Jesus Mol Peixoto (UNIVERSIDADE FEDERAL DE OURO PRETO - UFOP), Carlos Antônio da Silva (UNIVERSIDADE FEDERAL DE OURO PRETO - UFOP)
Abstract:
The liquid flow pattern inside a continuous casting tundish is a key factor as far as the final steel quality is concerned. This works deals with the asymmetric fluid flow in a two strand tundish due to the ladle shroud decentralized position. The effects of different weir and dam positions on the flow asymmetry and on the fluid velocity field are assessed. Trials were performed in an acrylic model, using water to simulate liquid steel and KCl as tracer in order to yield the RTD curves. Furthermore, the fluid flow was analyzed by mathematical simulation as well as PIV technique. It was possible to verify that weirs and dams are able to significantly decrease the asymmetry and to improve the inclusion flotation, due to the increase of the minimum residence time as well as the decrease of dead zones and amount of ladle change intermixed steel. Also weirs and dams combined seem to improve the fluid flow distribution on the free surface, favoring the steel limpidity.
Plenary
10/2/19, 2:00 PM - 10/2/19, 2:25 PM
Presenter(s): Elton volkers do espírito santo (INSTITUTO FEDERAL DO ESPÍRITO SANTO), Flaviani Marculano Marchesi (INSTITUTO FEDERAL DO ESPÍRITO SANTO), Heitor Cristo Clem de Oliveira (INSTITUTO FEDERAL DO ESPÍRITO SANTO), Silas Gambarine Soares (INSTITUTO FEDERAL DO ESPÍRITO SANTO), Henrique Silva Furtado (ARCELORMITTAL TUBARÃO), Felipe Fardin Grillo (INSTITUTO FEDERAL DO ESPÍRITO SANTO), José Roberto de Oliveira (INSTITUTO FEDERAL DO ESPÍRITO SANTO)
Abstract:
Due to the increased restriction of sulfur content in steels grades it becomes necessary to investigate the efficiency of hot metal desulfurization process. Therefore, the objective of this work is to employ different raw materials and fluxes such as lime, sodalite, limestone, standard mixture, fluorspar, KR slag, aluminum dross and B2O3, in order to find the composition with higher desulfurisation efficiency, relating it to the desulfurisation factor obtained by computational thermodynamics. The tests were performed at 1350 °C in an inert atmosphere with constant stirring. The results showed that the mixture with the highest efficiency was the one with 69% lime, 5% sodalite, 15% limestone, 6% KR slag and 5% B2O3.
Plenary
10/2/19, 2:00 PM - 10/2/19, 2:25 PM
Presenter(s): alessandra savazzini-reis (IFES - VITORIA), HELOISA FALTZ PIMENTEL (IFES - COLATINA), JULIA DINIZ SILVA (IFES COLATINA), MURILO DA ROCHA DIAS (IFES COLATINA)
Abstract:
The Brazilian ornamental stone industry presents a great diversity and reached in 2018 a production of 9 million tons. The state of Espírito Santo accounted for 72% of the exported volume of stone. Due to high production, the stone sector generates a large volume of waste, which added 3.26 million tons in the country in 2018, which can cause damage to the environment when inadequately disposed. The waste from the ornamental stone processing stage acts as a filler by filling the pores, and has technical potential for reuse in the civil construction of cementitious and ceramic materials. In this context, it was proposed the utilization of the waste of ornamental stone processing in pressed block for use in masonry. Cement mortars were made with the substitution of sand by waste in contents of up to 50% (mass) for molding blocks. The results showed that in the 10% waste content, there was improvement in the physical and mechanical properties of the blocks.
Plenary
10/2/19, 2:00 PM - 10/2/19, 2:25 PM
Presenter(s): Jônatas Targino Araújo (Universidade federal do ceará), jorge Luiz cardoso (UNIVERSIDADE FEDERAL DO CEARÁ), sergio souto maior tavares (UNIVERSIDADE FEDERAl fluminense), juan manuel pardal (UNIVERSIDADE FEDERAL FLUMINENSE), marcelo josé gomes da silva (UNIVERSIDADE FEDERAL DO CEARÁ)
Abstract:
The magnetic properties of the maraging 350 steel were analyzed in four different grain sizes. The applications of maraging steels can be found in several fields such as aeronautics, super centrifuges, navy, etc. Thus, this kind of steel must combine excellent mechanical properties with good magnetic ones. Microstructure and grain size can affect these properties. In order to evaluate the influence of grain size in some magnetic properties such as coercive force, saturation magnetization, remanence magnetization and Magnetic Barkhausen Noise (MBN), four solution temperatures were selected to vary the grain size of the samples. The samples were also aged in two different conditions after solution annealing. Vibrating-sample magnetometer (VSM) and MBN were used to analyze the changings in the magnetic properties as the grain size increased. The results showed changing in these properties related to grain size, making it possible to choose the best heat treatment conditions for magnetic applications.
Plenary
10/2/19, 2:00 PM - 10/2/19, 2:25 PM
Presenter(s): Juliano dalla Rosa (ARCELORMITTAL - ITATIAIUCU), Paulo henrique da costa (ArcelorMittal - itatiaiucu), Kheron Soares (aRCELORmITTAL - iTATIAIUCU), cHRISTIANO JOSE FERREIRA (ARCELORMITTAL - ITATIAIUCU)
Abstract:
At the moment when reflecting on quality of life, it becomes clear that the habits we adopt constitute what can be labeled lifestyle. Undoubtedly, it is the lifestyle that determines the essence of our living and the level of full satisfaction that we can enjoy, so we observe the need to seek a process to improve our health indicators that have a direct impact on the lives of our employees. With changing eating patterns and physical activity, the main causes of death today are non-communicable chronic diseases, resulting from our inadequate lifestyle. In view of this, ArcelorMittal Mineração Brasil, through the results of the evaluation of the health profile of employees, implemented the More Health Program in the year 2013 as a way to stimulate employees to adopt healthier living habits to improve their quality of life. The set of actions adopted by lifestyles produces a more or less adequate health profile and under this approach, it is not possible to particularize the risk factors without seeing them synergistically and simultaneously associated with the development of personal and work life. The health and well-being of employees have been a major concern in companies in recent years. Therefore, the improvement of the quality of life of its employees is based on all its practices. Therefore, it implemented the Mais Saúde Program with the purpose of increasing employees' knowledge regarding life behaviors and health conditions, starting from the access to information and awareness of adopting healthier habits
Plenary
10/2/19, 2:00 PM - 10/2/19, 2:25 PM
Presenter(s): Jéssica Moura Alves (bELGE)
Abstract:
Since the dawn of the industrial revolution, maintenance engineering has aimed to reduce downtime and maximize efficiency. Data science is poised to play a major role in the evolution of maintenance as we enter the age of Industry 4.0 and IoT. The first companies to figure out how to automatically convert their vast data into actionable insights will gain a huge competitive advantage. This paper discusses how to manage operational or manufacturing data to maximize operational productivity, build highly efficient maintenance services, and reduce the costs of downtime & repairs through machine learning and data science.
Plenary
10/2/19, 2:00 PM - 10/2/19, 2:25 PM
Presenter(s): Antonio Rodolfo Paulino Pessoa (Universidade Federal Rural do Semi-Árido)
Abstract:
In this work, welding costs were used to determine operational parameters and economically feasible for weld overlay with FCAW process. Four control factors were employed with three levels each: reference voltage (24, 26, 28 V), welding speed (0,33, 0,5 and 0,8 m/min), welding gun orientation (perpendicular, forehand and backhand), shielding gas (100%Ar, 100%CO2 and 80%Ar+20%CO2). The number of tests to be performed was determined by Taguchi method, dividing the tests into L9 orthogonal array resulting in a total of 9 experiments. To compare the costs incurred in each of the tests we used the total direct cost of welding a layer with dimensions of 40 x 190 mm, using an overlap of 50%. Based on the results, the maximum reinforcement obtained was 3.3 mmand the minimum required being 5 mm. Thus the Weld Overlay must have a minimum of two layers e and the lowest cost is obtained for the combination using the shielding gas 100%Ar, welding gun orientation forehand, a reference voltage of 28V and a welding speed of 0,33m/min.
Business Rounds
10/2/19, 2:00 PM - 10/2/19, 3:40 PM
Presenter(s): Coordinator: Walter Massanori de Saito – Consultant; Moderator:Arturo Forner Cordero – Associate professor – head of the biomechanics laboratory, mechatronics department of the University of São Paulo (USP);
Abstract:
Plenary
10/2/19, 2:00 PM - 10/3/19, 2:25 PM
Presenter(s): SEBASTIAO RAIMUNDO DE JESUS BELEM LEITAO FILH (INS FEDERAL DE EDUC CIENCIA E TECNOLOGIA DO MARANHAO), Sebastião Raimundo de Jesus Belém Leitão Filho (IFMA), Eden Santos Silva (IFMA), Samuel Filgueiras Rodrigues (IFMA), Gedeon silva reis (ifma)
Abstract:
In this work, the retardation in the static softening kinetics of an austenitic stainless steel ASTM F-1586 (ISO 5832-9) used in the manufacture of orthopedic implants is investigated. Double-pass deformations were applied by means of torsion testing under isothermal conditions. The samples were initially heated to 1250 oC using an induction furnace and were held for 300 s to allow for complete solubility. This was followed by cooling down to the deformation temperatures (Tdef) in the range 1000 to 1200 oC. Pass strains of 0.30, strain rate of 1.0 s -1 and interpass times ranging from 0.1-1800 s were employed. These process parameters were selected to simulate the industrial-scale hot forging of this alloy to produce orthopedic implants. The results of the thermomechanical physical simulations indicated that 60% of the softening mechanisms occurred by means of static recovery (SRV). The calculated stacking fault energy (γSFE) of the present material is around 69 mJ/m2, which explains the incubation time for the onset of static recrystallization (SRX) to be greater than 10 s at temperatures below 1100 oC. The static softening curves, i.e. softening fraction (Xs) versus time (tp) plots, indicate that the delay in the static recrystallization (SRX) kinetics probably resulted from the effect of Z-phase precipitates (NbCrN) located in the grain boundaries which were induced by deformation.
Plenary
10/2/19, 2:25 PM - 10/2/19, 2:50 PM
Presenter(s): José gedael fagundes Júnior (UFMG), Cláudio Turani Vaz (CEFET/MG), Alexandre Queiroz Bracarense (UFMG)
Abstract:
Increasing in demand for titanium alloys used for manufacture of orthodontic implants, which the machining processes are commonly applied have been generated a huge volume of residues (chips). Commonly these chips are discarded under a low economic value comparing to commercial titanium alloys. Titanium alloy chips were milled, classified as granulometry and used as a flux component in experimental tubular wires of MCAW type. The welds formed showed the formation of primary TiC as the second phase, resulting in significant improvement of the surface hardness values of the substrate. Diffractograms plots of the samples indicated that titanium present in weld reacted in the form of carbides, since phases of pure titanium were not found. As a result, microstructure of the weld has shown high hardness which are expected to increase the wear resistance of the substrate surface.
Round Table
10/2/19, 2:25 PM - 10/2/19, 2:50 PM
Presenter(s):
Abstract:
Plenary
10/2/19, 2:25 PM - 10/2/19, 2:50 PM
Presenter(s): Eduardo Netto de Souza (Villares Metals S.a.), Leonardo Barboza trindade (STE – Science Technology & Engineering), José Ernesto de Azevedo Nadalon (STE – SCIENCE TECHNOLOGY & ENGINEERING), Bruno pessoa ramos (Villares metals s.a.)
Abstract:
The Electromagnetic Stirring has been shown to be useful in the quality of solidification structures, inhibiting the formation of columnar structures, promoting the solute redistribution and defects attenuation through electromagnetic forces induced in the liquid phase. Based on the design of M-EMS of a billet-casting machine, simulations of fluid flow (CFD) and temperature under influence of electromagnetic field were performed. As a second aim, the stirrer effect on the inclusion trajectory and how it could promote the subsurface quality of the solidified structures was evaluated. Different frequencies and current of M-EMS, as well nozzles geometries, were tested. The results showed the tendency displacement of the particle, the fraction of solid particles removed from domain and the influence of M-EMS in the heat extraction from the mold, improving the temperature distribution during the solidification process.
Plenary
10/2/19, 2:25 PM - 10/2/19, 2:50 PM
Presenter(s): DARLAN RODRIGUES AZEVEDo (TECNOSULFUR SISTEMA DE TRATAMENTO DE METAIS LIQUIDOS SA), José Flávio Viana (Tecnosulfur S/A ), Alexandre Alvarenga Palmeira (UNIFOA)
Abstract:
The process of desulphurisation of pig iron is a very important stage for the manufacture of steel. Faced with the increasingly demanding need for noble applications of steel, it is necessary the development and studies seeking greater efficiency and optimized operating costs for better results in this process. Calcium carbide is an input used as a raw material for desulfurizing agents. By means of the scanning microscope and the EDS, the aim was to study and understand the mechanism of reaction of the calcium carbide in the process of desulfurization of the liquid pig iron, being carried out the study in the Laboratory of Tests and Analysis in Materials - LAMAT of SENAI of Itaúna - MG, together with the research and development sector of Tecnosulfur S / A.
Plenary
10/2/19, 2:25 PM - 10/2/19, 2:50 PM
Presenter(s): ISAAC GABRIEL PEIXOTO BORGES DE OLIVEIRA (UNIVERSIDADE FEDERAL DO SUL E SUDESTE DO PARA - UNIFESSPA), Beatriz Cordeio de Bona (UNIVERSIdade federal do sul e sudeste do pará - unifesspa), Vinicius Lemos Pereira (universidade federal do sul e sudeste do pará - unifesspa), Ponnyk Melo Torres (Faculdade Metropolitana de Marabá), Dilson Nazareno Pereira Cardoso (universidade federal do pará - ufpa), Clesianu Rodrigues de Lima (universidade federal do sul e sudeste do pará - unifesspa)
Abstract:
With more rigorous legislation and more incisive inspections, in addition to the difficulty of disposing of generated waste, companies have sought to improve their production processes in order to reduce their waste. Therefore, the present academic work sought the application of electric arc furnace dust with kaolinite clay in the elaboration of a polymeric cement, showing a possibility of use of the residues coming from the steel industry. The behavior of the product was evaluated through chemical analysis by X-ray fluorescence, laser granulometry, X-ray diffraction, axial compression resistance test and physical analyzes. Geopolymers with axial compressive strength of 16.67MPa were obtained, demonstrating that this destination is possible for the electric arc furnace dust.
Plenary
10/2/19, 2:25 PM - 10/2/19, 2:50 PM
Presenter(s): WILLY ANK DE MORAIS (unisanta), Fábio dos Santos Silva (gm do brasil)
Abstract:
Different types of welding wire are found in the market in general, but one of the most used by the automotive market is solid wire. On the other hand, tubular wire, known as “metal core” began to be also used by this industry, but with a much lower proportion due to lack of studies on it. This study was conceived with the purpose of contributing with further clarification regarding the use of tubular wires AISI 439Ti, in automotive exhausts welding, composed of AISI 1018 carbon steel and stainless steel AISI 409 and AISI 439 instead of solid welding wire AISI 307Si. To analyze the test specimens produced during this study, the following tests were used: micrographical analysis, fatigue, thermal fatigue, penetrating liquid and sensitization according to ASTM A763. The obtained results demonstrated the greater efficiency of the tubular wire compared to the solid wire.
Plenary
10/2/19, 2:25 PM - 10/2/19, 2:50 PM
Presenter(s): FÁBIO JOSÉ AFONSO (USIMINAS), THIAGO MARTINS RODRIGUES (USIMINAS), JOSE LUIS LLNOS (USIMINAS), LUCAS LIMA MESQUITA (USIMINAS)
Abstract:
Safe Hands Project started in 2013 with simple objective of protecting one of the most fundamental part of human body, the hands, motivated by our dissatisfaction with Brazil’s statistics accidents that showed 41% of accidents at work reached the hands. Our statistic it’s worse, with 42% of accidents involving hands. Focusing on the spirit of prevention, the project was directed to the development of new ways of performing work activities, through the creation of simple and effective devices, avoiding exposure of hands from the risks of accidents. Based on these statistics, this paper aims to describe the operation of the Safe Hands project within Usiminas, as well as its contribution with good safety results achieved with its implementation.
Plenary
10/2/19, 2:25 PM - 10/2/19, 2:50 PM
Presenter(s): Cláudio Faria Lopes Junior (Universidade federal fluminense - uff), Glauco Silva de Assis Machado (UNIVERSIDADE FEDERAL FLUMINENSE - UFF), Patrícia Sousa Nilo Mendes (UNIVERSIDADE FEDERAL FLUMINENSE - UFF), Priscila Sousa Nilo Mendes (UNIVERSIDADE FEDERAL FLUMINENSE - UFF), José Augusto Oliveira Huguenin (UNIVERSIDADE FEDERAL FLUMINENSE - UFF), Elivelton Alves Ferreira (UNIVERSIDADE FEDERAL FLUMINENSE - UFF), Ladário da Silva (UNIVERSIDADE FEDERAL FLUMINENSE - UFF)
Abstract:
This work aimed to characterize the surface of the Cu-Zn alloy and its oxides under the effect of the exposing samples to the gaseous atmosphere in a controlled environment with 40% umidity and at a temperature of approximately 23ºC. The Scanning Electron Microscopy technique with Energy Dispersion Spectroscopy was used to access the composition of the alloy elements. Afterwards, the Confocal Microscopy technique was used to analyze the topography of the samples and to measure the surface roughness of the material, based on DIN 4768 / ISO 4288. In addition, Spectroscopic Ellipsometry, a technique of optical analysis capable of measuring optical properties, the refractive index and extinction coefficient being a function of the wavelength in the range 250 nm to 1000 nm, and thin film thicknesses of oxides formed on the material.
Plenary
10/2/19, 2:25 PM - 10/2/19, 2:50 PM
Presenter(s): Matheus Oliveira PEREIRA (FAESA), maRCELO DE OLIVEIRA LIMA (ARCELORMITTAL), TÚLIO MIRANDA MOREIRA (autônomo)
Abstract:
This article aims to propose to show that protections intended for three-phase wound-rotor induction motors are not effective when there are certain failures in the rotor and then propose technical practices to make effective protection. The elaboration will consist of a study based on standards, books and recommended practices that describe methods of protection for induction motor. In addition, a simulation will be realized to prove that such protection methods really cannot protect the motor in studied, as well as being an additional to the literary collection with indications of methods for the protection of wound-rotor induction motors.
Plenary
10/2/19, 2:25 PM - 10/2/19, 2:50 PM
Presenter(s): João Pedro Santiago Carneiro (PUC MINAS), Fernando Vidal dos Santos (Kuttner do brasil), Pedro Paiva Brito (PUC MInas), José Rubens Gonçalves Carneiro (PUC MINAS), Carlos roberto de araújo (PUC MINAS)
Abstract:
ASTM A572 Grade 50 steel is produced in the form of sheets and hot rolled sections. It meets the fundamental requirements of structural microalloyed steels such as: Increase mechanical strength, allowing an enhancement of the load of the structure or making possible a reduction of the cross section, ie the use of lighter sections. This material is used in the railway sector because it meets strict requirements of safety specifications. The aim of the present study was to evaluate the corrosion resistance of ASTM A572 steel joints made with a thickness of 6.3mm, with a "V" type chamfer, at a 60º angle by GMAW - MAG processes wire ER 70S-6 & FCAW - MIG with wire 81 T1-A1
Plenary
10/2/19, 2:25 PM - 10/2/19, 2:50 PM
Presenter(s): MARIANA SIZENANDO LYRIO (uNIVERSIDADE FEDERAL FLUMINENSE), hARISON DA sILVA VENTURA (UNIVERSIDADE FEDERAL FLUMINENSE), Gabriella Maria Silveira de Sá (UNIVERSIDADE FEDERAL FLUMINENSE), Weslley Luiz da Silva Assis (UNIVERSIDADE FEDERAL FLUMINENSE), Paulo Rangel Rios (UNIVERSIDADE FEDERAL FLUMINENSE)
Abstract:
In this work, computational simulations of phase transformations are performed to analyze situations in which nucleation and growth velocity are not homogeneous in the material. The results were compared with analytical models of Rios and Villa. The microstructure and microstructural kinetics of the transformations are obtained and analyzed for cases in which there is a same velocity gradient and different nuclei gradients. The main result is that the transformation kinetics and the microstructure are affected in the same way for the different amounts of nuclei, although the velocity gradient is the same. In the microstructure, it was observed that in the lower part the grains are bigger whereas in the upper part the grains are smaller, as a consequence of the density of nuclei and the velocity of growth. All the computational simulations presented a good agreement with the analytical models
Plenary
10/2/19, 2:50 PM - 10/2/19, 3:15 PM
Presenter(s): PEDRO PAULO MEDEIROS RIBEIRO (UFRJ), Iranildes Daniel dos Santos (Instituto Tecnológico Vale/Vale S.A), Reiner Neumann (CETEM), Achilles Junqueira Bourdot Dutra (UFRJ)
Abstract:
A sample of nickel laterite ore from the northern region of Brazil was processed by hydro-pyrometallurgical route. The sample was pugged with sulfuric acid (50%, wt%) followed by 2-stages of heat treatment at 265°C and 780°C and aqueous leaching. The recoveries of nickel, cobalt, iron, and magnesium were 80.6%, 93.3%, 5.5% and 74.4%, respectively. Solid residues samples were characterized by X-Ray diffraction, scanning electron microscopy and chemical analysis. The phase quantification was carried out by the Rietveld method, and it was observed that the main mineral phases present in the solid residues were hematite, quartz, goethite, chlorite, and chromite. It also was found that 92.1% of the residual nickel present in the solid residue was in the chlorite
Plenary
10/2/19, 2:50 PM - 10/2/19, 3:15 PM
Presenter(s): josé geraldo da silva moreira (gerdau sa), Roberto Carneiro da Silva (gerdau sa), Eder Quental de Araújo (gerdau sa), Patrick Petronio de Castro Andrade (gerdau sa)
Abstract:
Reheating furnaces are commonly used equipment in the iron and steel industry for heating intermediate products to produce the casting process. The correct operation of these equipments can be measured through its productivity, its specific consumption and its metallic performance. This becomes even more challenging when it comes to multi-fuel furnaces and a large integrated steel plant such as Gerdau Ouro Branco, which has 5 reheating furnaces to attend 5 different rolling mills where the availability of combustible gases is variable for each oven. Thus, this work brings an optimization methodology capable of determining the best mix of fuels and Low Calorific Value (LCV) to operate the reheating furnaces in different situations and operational and production needs.
Plenary
10/2/19, 2:50 PM - 10/2/19, 3:15 PM
Presenter(s): rodrigo garcia ribeiro (rhi magnesita)
Abstract:
The Tundish is an essential equipment in the continuous casting process by having the role of assuring the continuity of the process during ladle exchange and by keeping the molten steel in an adequate range for the process. The present work consists in a study of improvement of the Tundish at Gerdau Divinópolis, in which a reduction in the steel temperature at the tundish inlet was achieved after modifications in the tundish refractory design and numerical simulation studies. The simulations showed that it would be possible to reduce significantly the steel temperature in the tundish and the field implementation of this modification led to significant gains, such as: reduction of power on, reduction of average temperature for release and consequent reduction in energy consumption.
Plenary
10/2/19, 2:50 PM - 10/2/19, 3:15 PM
Presenter(s): bruno das chagas bernardo (aRCELORMITTAL TUBARÃO)
Abstract:
The aim of this work was to evaluate the consumption of sulfur-containing scrap in a torpedo car without affecting the final quality of the product, aiming recirculate an internally generated by-product and increasing the pig iron yield distributed to the steel shop. The scrap in question is generated from the processing of the slag resulting from the scraping process after the desulfurization of the pig iron (KR) and the cleaning procedure of the torpedo cars. It was evaluated the operationality of the addition, risks involved in the process and reduction of generation with direct reuse in the process. The results showed that there is technical feasibility and significant financial gains.
Plenary
10/2/19, 2:50 PM - 10/2/19, 3:15 PM
Presenter(s): alessandra savaZZINI-REIS (IFES - VITORIA), Diana Malfer Andrade (IFES-COLATINA), Alana Franzin Fagundes (IFES - COLATINA), RODOLFO GIACOMIM MENDES DE ANDRADE (IFES - VITORIA)
Abstract:
The use of industrial waste, which is currently discarded and could be redirected to produce new materials, can be one of the alternatives to seek sustainability. In this context, the ornamental stone and carpentry industries of Espirito Santo have great production and technological development, but generate large volume waste in their productive stages that can be used as secondary raw materials in construction materials. With this, the objective of this research is to study the use of wastes from the ornamental stone and carpentry industries in vibrated hydraulic tile, which had its expanded use on sidewalks to meet NBR 9050. Cement mortars were tested for molding the vibrated hydraulic tile with granite waste and joinery waste. The pieces were shaped by vibration and subjected to curing to evaluate the flexural strength and the water absorption. The results indicate technical feasibility of using the wastes in hydraulic tile, in contents of up to 50% for the granite waste and maximum limit of 5% for the joinery waste.
Plenary
10/2/19, 2:50 PM - 10/2/19, 3:15 PM
Presenter(s): SIMONE IZABEL VIEIRA DE SANTANA (IME - instituto MILITAR DE ENGENHARIA), Rogério Itaborahy Tavares (IME - INSTITUTO MILITAR DE ENGENHARIA), Andersan dos Santos Paula (IME - INSTITUTO MILITAR DE ENGENHARIA), Luiz Paulo Brandao (IME - INSTITUTO MILITAR DE ENGENHARIA), Gabriel Augusto De Avila Santiago (UFF - universidade federal fluminense - unidade volta redonda)
Abstract:
The object of this work is to determine an optimum temperature - time combination for the age hardening treatment of 18Ni350 maraging steel in order to maximize its hardness. Heat treatments were carried out on samples previously solubilized at 820 °C for 1 hour and cold rolled for 2 different reductions, 80 and 90%. Three aging temperatures, 480, 500 and 520 °C, were evaluated for periods of time defined in accordance to the precipitation kinetics which was previous evaluated by Viswanathan e coautores [7] in steel with similar chemical composition. The highest Vickers hardness values resulted of heat treatments conducted at 480 °C for 5 hours, reaching 753 HV (or 62,4 Rockwell C) on the sample deformed 90%, and 724 HV (or 61,2 Rockwell C) on the sample cold rolled 80%.
Plenary
10/2/19, 2:50 PM - 10/2/19, 3:15 PM
Presenter(s): Juliano dalla Rosa (ARCELORMITTAL - ITATIAIUCU), Rafael Sander Borges Correia (ArcelorMittal)
Abstract:
Assuming that noise is the most prevalent physical risk in industrial environments, this study was developed with the objective of proving the efficiency in reducing the noise generated by a certain equipment in an industrial environment by reusing discarded material with the intention improvement in the quality of life of workers and compliance with current legislation. In order to do so, punctual measurements of the noise emitted by the splitter or splitter of riffles were carried out during the process of separation of iron ore samples before and after the installation of discarded synthetic rubbers on the contact surface of the equipment. After the implementation of the control measure there was a mean reduction of the noise level generated by the process by approximately 8 dB (A). This reduction of the noise level generated in the blocking process was statistically proven by the inferential method, composed by the parametric test called "t" test comparing the means that presented a significant result pointing to the efficiency of the environmental control measure of noise reduction. It is concluded that the use of discarded material as a way to reduce noise at source or in the trajectory is effective and sustainable, providing greater acoustic comfort for workers and reducing the amount of material discarded in the environment
Plenary
10/2/19, 2:50 PM - 10/2/19, 3:15 PM
Presenter(s): ZHAO Weijian (Hegang Group)
Abstract:
Plenary
10/2/19, 2:50 PM - 10/2/19, 3:15 PM
Presenter(s): José Carlos Diniz (DME ENGENHARIA & DOMINION DEUTSCHLAND GMBH)
Abstract:
The common hot blast stoves with internal combustion chamber operated satisfactory up to hot blast temperatures of approx. 1250 °C and the blast limitation of 280.000 Nm3/h. Thus the design of these stoves only differed slightly from each other until the moment when the demand for higher efficiency of blast furnace operation required higher hot blast temperatures, for that, a top combustion stove design represents one of the options. The reason for the development of this kind of stoves was the former weakness of stoves with internal combustion chamber, especially in the area of the combustion chamber / checker chamber division wall. The idea was basically to avoid the division wall at all. To overcome the problems of stove shutdown, DOMINION GmbH & DME ENGENHARIA introduced to the market a pioneer methodology due to the need of a short time for this revamping. Top Combustion Stove Hot repair was never done anywhere in the whole world until the first repair done in Sept, 2018 with success and zero accident. The proposal of this paper is to show how important is to keep stoves lifetime in between 25 to 40 years campaign avoiding cooling down procedure, which drastically compromises the stove life at each occurrence.
Plenary
10/2/19, 2:50 PM - 10/2/19, 3:15 PM
Presenter(s): MARIA MARIANA SIMOES FERREIRA (UNIVERSIDADE FEDERAL DE MINAS GERAIS), Frank de mello liberato (Instituto federal de minas gerais), Alexandre Queiroz Bracarense (Universidade Federal de Minas Gerais)
Abstract:
Stainless steels are a very important category of carbon steel alloys as they are used in a wide range of applications in many sectors thanks to their high corrosion resistance in various environments. This versatility has made welding processes of these steels very common. Based on this, this work investigated the formation of a stainless steel weld metal by the use of an FCAW welding electrode formed by an AISI 1006 carbon steel tube and a metallic flux containing powder of nickel and iron-chromium alloy, which are essential elements for the formation of this kind of steel. Production of the wire electrode and weld metal characterization were performed and described in this work.
Plenary
10/2/19, 2:50 PM - 10/2/19, 3:15 PM
Presenter(s): Gabrielle cristine lemos duarte freitas (Universidade federal fluminense), GLÁUCIO SOARES DA FONSECA (UNIVERSIDADE FEDERAL FLUMINENSE), Luciano pessanha moreira (universidade federal fluminense)
Abstract:
Duplex stainless steels are known for their high mechanical strength and high corrosion resistance, properties that justify their development and application in chemical and petrochemical sectors. These properties are associated to the microstructure, which has similar volumetric fractions of ferrite and austenite, through additions of alloying elements such as Cr, Mo and Ni. However, in thermal processes at high temperatures, important microstructural changes can occur, where alloying elements previously arranged in solid solution in the matrix form intermetallic precipitates, which are usually deleterious to the properties of toughness and corrosion resistance. The objective of this work is to study phase transformations resulting in non-isothermal cooling cycles in a stainless duplex SAF 2205. The experiment contemplates a sequence of four simulated thermal cycles in Gleeble 3500®. In order to investigate the phase precipitation process, the dilatometric technique was used, where it was possible to determine the phase transformation temperatures in the samples. This information is validated through the results obtained in the microstructural study using optical microscopy. Through the correlation between the volumetric fraction of the transformed phase and the hardness test performed it was also possible to guarantee the influence of the phases found in the properties of the material.
Plenary
10/2/19, 3:15 PM - 10/2/19, 3:40 PM
Presenter(s): RAFAEL DE MOURA NOBRE (USP), Luiz Felipe Bauri (USP), Jhoan Sebastian Gúzman-Hernández (USP), Daniel Rodrigues Júnior (USP), Fernando José Gomes Landgraf (usp)
Abstract:
Additive Manufacturing, popularly known as 3D printing is a set of fabrication techniques that can build parts with complex geometries by adding material layer by layer. Powder bed fusion techniques have been studied for the fabrication of metallic materials. The selective laser melting (SLM) process particularly uses a high laser power and scanning speed which promotes the formation of solidification texture therefore a potential reduction of elasticity modulus, opening a set of new alternatives for biomaterials in implants. This study investigated the effect of laser scanning speed on the microstructure and crystallographic texture of the Nb-47Ti alloy fabricated by selective laser melting. Three samples were produced at a constant power (300 W) and scanning speed of 1000 to 1300 mm / s. The microhardness tests were performed in the Vickers microdurometer, the microstructure was characterized by optical microscopy (MO) and scanning electron (SEM), the crystallographic texture data were obtained by backscattered electron diffraction (EBSD) and after the pole figures, inverse pole figures and orientation maps were obtained using EDAX OIM Analysis software. Experimental results shown a microestructure with cellular solidification morphology and zones of cellular-dendritic transition. The increase of laser scanning speed showed a correlation with the increase in microhardness and the formation of a Ti-β cubic texture {100} <100> parallel to the building direction.
Plenary
10/2/19, 3:15 PM - 10/2/19, 3:40 PM
Presenter(s): EDUARDO HOLLANDERS DE MOURA (REDEMAT), Paulo santos assis (Universidade Federal de ouro preto), carlo tripoli (Autônomo)
Abstract:
This paper shows how the use of a Stirling engine can make the steelmaking process more sustainable and profitable by generating electrical energy with the thermal waste of the electric steelmaking slag. A theoretical model was used to develop the engine, with considerations to approximate the result of reality. The results obtained shows that 3 million dollars can be saved per year in the national steel industry.
Plenary
10/2/19, 3:15 PM - 10/2/19, 3:40 PM
Presenter(s): ANDRE AFONSO NASCIMENTO (GERDAU - OURO BRANCO), Roberto Parreiras Tavares (UFMG), Afrânio Márcio Costa (GERDAU - OURO BRANCO), Carlos Vinícius Domingos de Carvalho (GERDAU - OURO BRANCO), Eduardo de Paula Silveira (GERDAU - OURO BRANCO), Honicássio de Souza Ferreira (GERDAU - OURO BRANCO), Wenderson Tcharles Resende (GERDAU - OURO BRANCO)
Abstract:
Heat transfer models allows knowledge slab’s shell thickness and superficial temperatures, important to propose improvements for slab’s quality. In this study was developed a 2½ D model, that follow a transverse section of the slab during the whole extension of the machine, adjusting the boundary conditions for each region. Results of surface temperature measurements and shell thickness of slabs was used to validate the model. The model was suitable for the boundary conditions and parameter of slab continuous casting machine of Gerdau Ouro Branco aiming to provide subsidies for the slab’s superficial and internal quality improvement.
Plenary
10/2/19, 3:15 PM - 10/2/19, 3:40 PM
Presenter(s): CHRISTIANO DE PAULA BOAVENTURA (APERAM INOX AMERICA DO SUL SA), Alessandro Martins Duarte (APERAM INOX AMERICA DO SUL SA), Gabriela Patricia Gomes (APERAM INOX AMERICA DO SUL SA), HELIO BRAZ LOSS (APERAM INOX AMERICA DO SUL SA), Janeir Ribeiro Dutra (APERAM INOX AMERICA DO SUL SA)
Abstract:
For steel production in an integrated mill liquid cast iron is predominant in the composition of the metallic load, however, taking into consideration its typical composition and for optimization of the process it is necessary that there is a treatment preceding the loading of the converter. High silicon content loaded in converters for carbon and electric steel production causes higher flux consumption to neutralize the silica generated during the process and greater instability, while very low contents do not provide a favorable heat balance for the use of scrap. Therefore, it is necessary to work with a strip of silicon that meets the minimum necessary for a favorable thermal balance. The aim of this project was to model the desiliconization through the addition of a desilicizer and blowing agent in the pan, working with a final silicon content of 0.20% to 0.50%. The desiccation of the pig iron is carried out in 2 stages, the first one when the pig iron is transferred from the torpedo car to the pot and the second stage with oxygen blow. The project managed to reduce the number of races outside the specification by 44%, thereby reducing the flux consumption in the converter.
Plenary
10/2/19, 3:15 PM - 10/2/19, 3:40 PM
Presenter(s): fernanda aparecida sampaio da silva (UFF), Marcos flávio de campos (uff), vanessa gomes pereira (uff)
Abstract:
Magnetic nanoparticles are a promising material for advancing cancer treatments. Conventional techniques have important limitations because it exposes the whole organism to aggressive conditions. The magnetic hyperthermia technique is an alternative to conventional oncology treatments and consists of the application of magnetic particles in tumor tissues under the application of an external magnetic field, in order to cause the early death of cancer cells, preserving the healthy cells. Magnetic composites are designed to reduce side effects, as they provide punctual application and therefore limit the area of application to dysfunctional tissue only. In this work were synthesized Fe3O4 nanoparticles coated with a polymer blend of variable composition of glutamine and polyethylene glycol, aiming application in magnetic hyperthermia. Samples were submitted to TGA, hysteresimeter and nanosight analyzes. The results indicate that the nanocomposite is adequately coated, in addition to satisfactory magnetic saturation and particle size compatible with the magnetic hyperthermia technique.
Plenary
10/2/19, 3:15 PM - 10/2/19, 3:40 PM
Presenter(s): brendon costa barreto (UNIVERSIDADE FEDERAL DE SERGIPE), THÁCYLLA JAMILLE MECENAS DE JESUS (Universidade federal de sergipe), Michelle Cardinale Souza Silva Macedo (universidade federal de sergipe), sandra andreia stwart de araujo souza (universidade federal de sergipe)
Abstract:
In this work, the effect of the titanium on microstructure and mechanical resistance of Fe–25Cr–xTi alloys (x = 0, 0.4, 0.6) (wt. %), in as-cast and as-hot rolled conditions, was investigated by optical microscopy, scanning electron microscopy with coupled energy X-ray dispersion spectroscopy, X-ray diffraction and Vickers hardness test. The results showed that in the as-cast condition the microstructures were composed of coarse ferritic grains. The alloys that were submitted to the hot rolling presented considerable decrease of the grain size, whose greater effect was observed in the alloy containing 0.4% Ti. With the additions of titanium there was a gradual increase of precipitates tending to combine with carbon. The hardness values of the alloys were strongly influenced by the residual carbon contents than by the additions of titanium.
Plenary
10/2/19, 3:15 PM - 10/2/19, 3:40 PM
Presenter(s): Lucas de Mendonça Neuba (Instituto militar de engenharia), Alexsandro de oliveira (UniFOA), Sergio neves monteiro (Instituto militar de engenharia), Alexandre alvarenga palmeira (Universidade estadual do rio de janeiro)
Abstract:
The constant search for the improvement of projects and products is of extreme importance to guarantee the product availability and reliability of them. The comparative study done in the present work relates the characteristics of sealing rings using CuAl bronze with tin surface (Sn) as a material with CuAl brass rings with superficial Pb, both applied in a positive displacement or volumetric displacement pump. 6 samples of SAE-68D aluminum bronze, with dimensions of 2.5 x 2.5 x 50 cm, were used to obtain a superficial layer of superficial Pb. 3 SAE-68D aluminum bronze rings, having internal diameter dimensions 35.4mm and external diameter 46.9mm, were used as samples. Through a thermochemical treatment process, after with periods of treatment different from 3, 4 and 5 hours. For these periods a diffusion of lead occurred on the surface of the rings. Analyzes made from captured images of each brass ring with shallow Sn by a scanning electron microscope and 2 samples for the Pb were sectioned in order to prove the migration of the lead. Pb showed an easiness diffusion on the base metal surface, however, it does not diffuse in the inner layers of the base metal without altering the properties.
Plenary
10/2/19, 3:15 PM - 10/2/19, 3:40 PM
Presenter(s): paulo rogério vieira (tecnimex group)
Abstract:
This work aims to present a new methodology for the alignment of continuous casting machines through the use of portable long-range laser measuring equipment (Laser Tracker). In this paper will be presented a practical case study, where one of the machine veins of the continuous casting machine was aligned, thus allowing a direct comparison of the quality and productivity gains before and after the alignment.
Plenary
10/2/19, 3:15 PM - 10/2/19, 3:40 PM
Presenter(s): PABLO ALTOE AMORIM (JAFENG / FAESA CENTRO UNIVERSITÁRIO), Nelson Fernando Santos Eltz (FAESA CENTRO UNIVERSITÁRIO), Luiza Emília Vila Nova Mazzoni (Universidade federal do Espírito santo), Ana Carolina Agrizzi Araujo (Universidade federal do Espírito santo), José Antônio Ramiro Avelar (vale), José Amorim Filho (jafeng), Temistocles de Sousa Luz (Universidade federal do Espírito santo)
Abstract:
The crankshafts of locomotives have a lubrication channel that goes through its length. During maintenance, these are often heated, by means of a torch, that can form martensite and consequently, the nucleation of cracks, which can lead to catastrophic failure of the crankshafts. The recovery process of these cracks by traditional means becomes impracticable due to the size of the shaft, with a length up to four meters, thus, the viability of the double layer method performed in an automated process. Four differents heat inputs single layer welding were tested in SAE 4140 steel according to the reference [1] and their heat affected zones (HAZ) were determined by microhardness. The heat inputs were combined and chosen so that the soft zone of the second layer overlaps the hard zone of the first layer. After double layer welding on 4140 steel, the combination that presented the best result was tested on SAE 4130 steel, showing satisfactory results. Thus, the method is feasible and must be tested with the manual process.
Plenary
10/2/19, 3:15 PM - 10/2/19, 3:40 PM
Presenter(s): loyslene rabelo fernandes (ufmg), Dagoberto Brandão Santos (ufmg), Davi Silva Alves (ufmg), Lisa Claeys (Ghent University), Tom Depover (GHENT UNIVERSITY), kim verbeken (GHENT UNIVERSITY)
Abstract:
Duplex stainless steels (DSS) possess good mechanical properties of ferrite with the corrosion resistance of austenite. They are heavily employed in the petrochemical, paper and nuclear industries. However, they are susceptible to hydrogen embrittlement (H2). Samples of DSS 2205 type were received in the condition of homogenization annealing (1100C for 300 s and cooling in water). They were cold rolled and annealing at 1100C for 2 h and 850C for 24 h. They were then loaded with H2. Melt extraction analyses were applied to quantify the hydrogen in the steel. In situ tensile tests with simultaneous H2 loading were used to evaluate the embrittlement caused by this element. Completing the H2 analysis, thermal desorption spectra were constructed. The microstructure was characterized by scanning electron microscopy, back scatter electron diffraction (EBSD), X-ray diffraction and transmission electron microscopy. In the aged condition the sigma, chi and carbide phases were identified. The DSS presented a considerable reduction of ductility, reaching 5% of elongation already in the aged state. The hydrogen charging has not altered this condition. Fusion Extraction revealed hydrogen content in the microstructure of up to 50 wppm for the annealed condition, while for the aged sample was 10 wppm. Despite the high volume fraction of intermetallic phases and loading with H2, the fracture surfaces were characterized as microvoids coalescence and intergranular.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): iane de araújo soares (LNDC/Coppe/ufrj)
Abstract:
HP austenitic steels are used in the manufacture of steam reforming furnace tubes mainly due its high mechanical strength and the corrosion at temperatures above 700°C. Nevertheless, problems during the operation can cause blocking of the internal feedstock flow, which generates a fast increase of temperature in the tube wall higher than the normal operation temperature. This type of failure is known as temperature surge, that can result in a large longitudinal cracks along the tube height. The microstructural characterization of the changes occurred during the temperature surge are important to determinate the detection parameters of this condition through nondestructive testing. Therefore, in order to analyze the magnetic response of the samples that suffered a temperature surge, two cases were evaluated. The first one corresponds to the analysis of a sample from a steam reforming tube that suffered the referred intercurrence during operation. The second case corresponds to the samples with state V of microstructural evolution, which were submitted to a thermal cycle in order to simulate the overheating. The analysis was performed by magnetic force microscopy. The obtained results showed a magnetic response in the boundary of the carbides of the sample exposed a temperature surge in service and in the simulated sample at 1050°C.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): LARISSA FERNANDES NUNES (INSTITUTO MILITAR DE ENGENHARIA), mÔNICA ALINE MAGALHÃES GURGEL (INSTITUTO MILITAR DE ENGENHARIA), eUSTÁQUIO DE SOUZA BAÊTA JÚNIOR (INSTITUTO MILITAR DE ENGENHARIA), ANDERSAN DOS SANTOS PAULA (INSTITUTO MILITAR DE ENGENHARIA ), LUIZ PAULO MENDONÇA BRANDÃO (INSTITUTO MILITAR DE ENGENHARIA)
Abstract:
High Al content TRIP-assisted (Transformation Induced Plasticity) steels are being developed with great potential to become third generation steels for automotive applications. Thus, because they are still in the development phase, studies on these materials are extremely relevant. This work evaluated the influence of the cold rolling and intercritic annealing, on a TRIP-assisted steel alloy with high Al content, with alloys behavior associated to phase transformations by differential scanning calorimetry (DSC), phase identification and crystallographic texture by X-ray diffraction (XRD) and microstructural aspects by Optical Microscopy (OM). The thermomechanical processing employed, with distinct soaking temperatures on intercritic annealing, didn’t influence the alloy crystallographic texture, however, different retained austenite fraction were verified for each condition, being the highest value observed at 820 ºC
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): mariana gaudencio barbosa lima (lndc/coppe/ufrj), Ana Beatriz Fonseca (coppe/ufrj), Mónica Patrícia Arenas (lndc/coppe/ufrj), Clara Johanna Pacheco (lndc/coppe/ufrj), Carlos Bruno Eckstein (petrobras), Laudemiro Nogueira Júnior (petrobras), Luís Henrique de Almeida (coppe/ufrj), Gabriela Ribeiro Pereira (lndc/coppe/ufrj)
Abstract:
In this work we evaluate the influence of microstructural changes and chemical composition of HP-Nb austenitic steels on the magnetic signal detected by the magnetic force microscopy (MFM). In addition, the influence of electrostatic forces on the response detected by MFM was also investigated using the Kelvin probe force microscopy (KPFM) technique. For this experiment, four samples were analyzed, which were extracted from different zones of two steam reforming tubes with different chemical compositions and microstructural conditions. According to the results, the samples with as-cast condition exhibited a magnetic response in the carbides boundary’s, while samples with advanced aging state did not presented a magnetic response
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Nayara Aparecida Lopes Viana (Departamento de engenharia metalúrgica e de materiais da ufmg), Loren Kelly de Paula Inácio (DEPARTAMENTO DE ENGENHARIA METALÚRGICA E DE MATERIAIS DA UFMG), Renata de Oliveira Melo (DEPARTAMENTO DE ENGENHARIA METALÚRGICA E DE MATERIAIS DA UFMG), Graziele Gianini Braga Maria (DEPARTAMENTO DE ENGENHARIA METALÚRGICA E DE MATERIAIS DA UFMG), Witor Wolf (DEPARTAMENTO DE ENGENHARIA METALÚRGICA E DE MATERIAIS DA UFMG), Dagoberto Brandão Santos (DEPARTAMENTO DE ENGENHARIA METALÚRGICA E DE MATERIAIS DA UFMG)
Abstract:
Duplex stainless steels combine the mechanical properties of ferrite with the corrosion resistance of austenite. When this material is subjected to heat treatments, secondary phases may precipitate, resulting in severe deterioration of corrosion and mechanical properties. The goal of this work was to evaluate the occurrence of secondary phases in a cold rolled 2205 duplex stainless steel with an ultrafine grain after aging at temperatures ranging from 600°C to 950°C for different times (300-86400 s). Scanning electron microscopy (SEM) coupled with electron backscattered diffraction (EBSD) and x-ray diffraction (XRD) were used for phase identification and quantification. Mechanical properties were evaluated using tensile and Vickers microhardness tests. The presence of and phases was observed together chromium carbide, M23C6, and were confirmed only after 800ºC ageing treatment. In a general way, an increase in the aging time led to a greater precipitation of the secondary phases. As precipitation occurred, there was an increase in the austenite and a decrease in the ferrite volume fractions. Although mechanical strength has increased, the overall mechanical properties, such as ductility, were impoverished as the precipitation proceeded.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Rosa Maria Sales da Silveira (coppe/ufrj), alessandra vieira guimarães (coppe/ufrj), clarissa hadad de melo (universidade do porto), rafaella martins ribeiro (coppe/ufrj), leonardo sales araujo (coppe/ufrj), luiz henrique de almeida (coppe/ufrj), jean andré françois dille (Université Libre de Bruxelles)
Abstract:
This work aims to investigate the Y effect on precipitation of the δ phase on nickel-based alloy 718 and correlate the microstructural characterization with the precipitation/dissolution of phases, using thermal analysis. The solubilized and aged alloys A, B and C were characterized using scanning and transmission electron microscopy, with EDS analysis. The microstructural characterization was confirmed with differential scanning calorimeter analysis technical. The results showed that yttrium addition influences the grain size and, consequently, the δ phase precipitation. The Y addition modified the δ phase precipitation kinetics, which varied according to Y content.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Thiago Tôrres MATTA NEVES (LNDC/COPPE/UFRJ), Cayo vinicius da silva lima (LNDC/COPPE/UFRJ), Clara Johanna pacheco (LNDC/COPPE/UFRj), Carlos Bruno Eckstein (Petrobras), Laudemiro Nogueira Junior (PETROBRAS), Luiz Henrique de Almeida (COPPE/UFRJ), gabriela ribeiro pereira (LNDC/COPPE/UFRJ)
Abstract:
HP austenitic steels are currently the mostly used materials for refurbish furnaces tubes because of their superior properties in high temperature working conditions. Due to their exposition to oxidizing environments during service, a complex layer of different oxides is formed on the external wall of the tubes, followed by an adjacent chromium depleted layer. The presence of magnetic response in this region directly influences the development of non-destructive inspection tools, used for magnetic evaluation of the microestrutural evolution on refurbish furnaces. In order to characterize the magnetic response on the transformed layer, a sample with aging state V was analyzed using Kerr microscopy technique. It was initially performed qualitative analysis via imaging and subsequently a quantitative analysis by assessing its hysteresis curve. The results allowed for the identification of the regions that showed magnetic domains and correlate its behavior with the value of the magnetic field applied.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Alexandre RoDIZIO BENTO (UNICESUMAR), GILMARA FAGUNDES (INSTITUTO LACTEC)
Abstract:
The prevention of accidents in the work environment becomes essential to protect employees in the automotive sector. This sector seeks prevention tools to contribute in an orchestrated way with the safety and protection of the employee in the work activity. The PPE is one of these tools that are associated with the prevention and neutralization of the risks of accidents. The accident has costly cost compared to prevention, it can improve the company's image before society and competitors in the industry. In this scenario, this work presents the implementation of an automatic systemic process to manage PPE as a way to reduce costs. The methods applied to the production cells of the automotive sector are detailed and analyzed to counteract possible risks of accidents at low cost. This application allows the following results to be obtained: minimizing or eliminating accidents, ensuring the withdrawal of PPE, reducing costs with PPE, improving the worker's quality of life and improving the company's image vis-à-vis the globalized market.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Ihana Gabriela Conceição de Jesus (ufs), matheus duarte Macedo (ufs), isau de souza alves junior (ufs), Gustavo dória lima (ufs), Sandro Griza (ufs)
Abstract:
Oil, being so versatile, is widely used all over the world for many applications. For the extraction of petroleum, one of the most used techniques is to inject water into wells through a column of injection through valves. In these valves there are springs that are failing with undesired frequency. The springs thus become the object of study of this article so that one discovers the motive of the faults and then proposes viable and reliable solutions. In this way, metallographic, fractographic and hardness analyzes were performed. In view of this, it was verified that the spring in study presented preferential corrosion, besides the formation of pites that led to failure by overload. With the metallographic analysis, it was verified the microstructure formed by austenite grains. Thus, the spring was manufactured from wire that received high level of cold deformation, which reduces the resistance to corrosion, causing greater susceptibility. In this way, it is recommended to change the design of the drive or seal the spring against the electrolyte, or, selection of a drive principle that presents greater resistance against the corrosion of the medium.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): MATHEUS MARIANO DA SILVA REIS (Universidade federal de sergipe), Priscylla Ferreira dos Santos (UNIVERSIDADE FEDERAL DE SERGIPE), Lucas Santos Silva (UNIVERSIDADE FEDERAL DE SERGIPE), ihana Gabriela Conceição de Jesus (UNIVERSIDADE FEDERAL DE SERGIPE), sandro griza (UNIVERSIDADE FEDERAL DE SERGIPE)
Abstract:
The present report deals with the failure analysis of the heating element used in the fresh water calorifier. Three heating tubes connected to the support compose the heating element. One of these tubes presented severe damage. The damaged tube was manufactured from superaustenitic stainless steel with 199 HV1 microhardness. The tube presented sensitization, identified by chromium carbides in the grain boundaries. Sensitization decreases the chromium content in the vicinities of the grain boundaries, which enhances the intergranular corrosion of the alloy in contact with the water. When the intergranular cracks evolve to a pitting, they can reach the inner surface of the tube, and allow for the short circuit between the tube and the electric resistance coil inside the tube. Several such short circuit sites identified in the tube caused damage by melting and plastic collapses of the tube.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): MATHEUS MARIANO DA SILVA REIS (Universidade federal de sergipe), Felipe de Freitas Thompson (Mosaic Fertilizantes), Matheus Duarte Macedo (Universidade Federal de Sergipe), Isau de Souza Alves Júnior (Universidade Federal de Sergipe), Príscylla Ferreira dos santos (Universidade Federal de Sergipe), Sandro griza (Universidade Federal de Sergipe)
Abstract:
In the present study, the internal hex head screw failure was analyzed, which failed the screw head. Screws are fasteners used in non-permanent joining of parts. In the analysis of failures were performed chemical analysis, macroscopic analysis, analysis of scanning electron microscopy and metallography. The results showed that the screws comply with the standards when it comes to chemical composition and microhardness, but in the question of dimensions, there was an inclination in relation to the axis of the screw and the contact face of the head
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): VICTOR BARBOSA DE SOUZA (UFF / UENF / UNIREDENTOR), Claudio Cabral Junior (UFF / UENF / UNIREDENTOR), Thiago Homero Murro (UFF / UENF / UNIREDENTOR), Amanda Camerini Lima4 (UFF / UENF / UNIREDENTOR), Daniel Passos gallo (UFF / UENF / UNIREDENTOR)
Abstract:
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Yuri Mikael dos Santos Alves (instituto militar de engenharia), marcelly quintão oliveira (INSTITUTO MILITAR DE ENGENHARIA), carolline serafim da silva (assistente técnico ii - csn), thiago henrique fernandes dias ferrão (INSTITUTO MILITAR DE ENGENHARIA), patrícia freitas rodrigues (INSTITUTO MILITAR DE ENGENHARIA), Andersan dos Santos Paula (INSTITUTO MILITAR DE ENGENHARIA)
Abstract:
Austenitic stainless steels are one of the most relevant steels because they combine corrosion resistance, good weldability and good mechanical properties. Thus, the present work aims to understand the steels microstructural evolution (phase transformation) of the 200 and 300 series steels, 201LN and 304L particularly, that are susceptible to transformation induced plasticity (TRIP effect) and that were submitted to an uniaxial compression deformation, analyzing its final structure, in comparison to cold rolling. It was verified that the technique of X-ray diffraction combined with the scanning electron microscopy is adequate to verify the occurrence of the martensitic transformation in the steels in study, in which the micrographs before of the sample deformation presented a totally austenite structure and after the deformation noticed the presence of martensite needles in both samples. In the diffractograms obtained by the X-ray diffraction technique of the samples before the deformation had only the characteristic peaks of the austenite and after the deformation the presence of characteristic peaks of the martensite alfa’ in the 304L and 201LN steels was observed, thus confirming that there was more significantly martensitic transformation on the 304L steel and during uniaxial compression that cold rolling.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Elton ítalo vieira xavier (UFPE- Universidade Federal de pernambuco), Lorene Ester Fernandes (UFPE - Universidade Federal de pernambuco), Diogo Monteiro do Nascimento (UFPE - UNIVERSIDADE FEDERAL DE PERNAMBUCO), Moisés Euclides da Silva Júnior (UFPE - UNIVERSIDADE FEDERAL DE PERNAMBUCO), Sandra Torres Zarzar (UFPE - UNIVERSIDADE FEDERAL DE PERNAMBUCO), Everthon Rodrigues de Araújo (UFPE - UNIVERSIDADE FEDERAL DE PERNAMBUCO), Oscar Olimpio de Araujo Filhor (UFPE - UNIVERSIDADE FEDERAL DE PERNAMBUCO)
Abstract:
It was studied a methodology for the reuse of machining chips in the manufacture of metallic powders of aluminum alloy AA6061. In the manufacturing of the powders a high energy ball milling (HEBM) technique was used. The samples of the manufactured powders and a commercial powder sample were analyzed for morphology and composition by means of particle size analysis (PSA), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The powders obtained presented unimodal particle size distribution, average particle size comparable to commercially available powders, and chemical composition defined for the AA6061 alloy.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): FABIO DA COSTA GARCIA FILHO (IME MILITAR DE ENGENHARIA), Michelle Souza Oliveira (IME), Luana Cristyne Da Cruz Demosthenes (IME), Wendell Bruno Almeida Bezerra (IME), Fernanda Santos da Luz (IME), Ulisses Oliveira Costa (IME), Julianna Magalhães Garcia (IME), Sergio Neves Monteiro (IME)
Abstract:
The nickel superalloys, Inconel 718, is highly applied in petrochemical plants and power generation due to their ability to maintain a good relationship between stiffness and toughness even at high temperatures. On the other hand, the use of such material under the conditions required in these industries may favor the occurrence of the phenomenon of hydrogen embrittlement, which would reduce the useful life of these materials in service. Tensile and fracture surface analyzes were performed by observing the influence on this type of alloy. The reduction in mechanical properties was observed although the fractographic analysis has not indicated the change in fracture mode of the material, changing the ductile to brittle.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Fábio silva de oliveira (instituto nacional de tecnologia), edilvando pereira eufrázio (instituto nacional de tecnologia)
Abstract:
Highlights: This article made a literature review of Titanium and additive manufacturing, through graph centralities and bibliometric techniques, investigating the interactions into the thematic. Therefore, the article aims to answer the following research question: What is the state of the art of additive manufacturing of titanium applied to dentistry? Objective: to understand the dynamics and the tendency of publications in this area, and to investigate the relation of citations authors within a knowledge base. Method: Retrieval of scientific articles in the Web of Science, related to Titanium and additive manufacturing. Also the construction of multiple bibliometric indicators. Results: After making the filters and considering only articles, we found 122 articles in the Web of Science database. With the use of bibliometric analysis techniques, it was possible to identify the most influential authors, keywords Conclusion: Through the development of the work, it was possible to compare the Scientific Production that deals with Titanium and additive manufacturing applied in dentistry , this investigation showed that the scientific production encompassing the theme is growing and there is the prominence of certain areas that deal more on the subject, such as the health and industrial areas.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): JÉSSICA Vicente Luiz (Centro Federal de Educação Tecnológica Celso Suckow da Fonseca (CEFET/RJ) - cAMPUS Angra dos Reis), RAYANDER MARTINS PIMENTA (CENTRO FEDERAL DE EDUCAÇÃO TECNOLÓGICA CELSO SUCKOW DA FONSECA (CEFET/RJ) - CAMPUS ANGRA DOS REIS), Darlene Souza Da Silva Almeida (CENTRO FEDERAL DE EDUCAÇÃO TECNOLÓGICA CELSO SUCKOW DA FONSECA (CEFET/RJ) - CAMPUS ANGRA DOS REIS)
Abstract:
The present study aimed to evaluate the influence of asymmetry in the magnesium alloy AZ31 during lamination, from a microstructural point of view and mechanical property. Several studies have been conducted in magnesium alloys to acquire better mechanical properties, especially of conformability, since limited conformability is one of the main problems presented by these alloys. This paper presents the microstructural results for samples processed by asymmetric and symmetrical rolling at room temperature, 100, 200, 300 and 400 °C. It was possible to observe that all samples submitted to the asymmetric rolling process presented a higher hardness value in relation to those laminated symmetrically. In addition, the samples rolled symmetrically at 400 °C presented refined grains, typical of recrystallization. On the other hand, the same effect was observed in the asymmetric case, but for the sample rolled at 300 °C. The lower recrystallization temperature in this case is probably related to the fact that the asymmetric process can impose a higher level of deformation.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Oscar Olimpio de Araujo Filho (ufpe - universidade federal de pernambuco), Elinaldo Neves dos Santos (IFPE - instituto federal de educação tecnológica de pernambuco), Thamy Gomes Pacheco Sobreira (UFPE - UNIVERSIDADE FEDERAL DE PERNAMBUCO), Heronilton Mendes de Lira (UFPE - UNIVERSIDADE FEDERAL DE PERNAMBUCO), Ednaldo Evangelista de Lacerda Júnior (IFPE - INSTITUTO FEDERAL DE EDUCAÇÃO TECNOLÓGICA DE PERNAMBUCO), Everthon Rodrigues de Araújo (UFPE - UNIVERSIDADE FEDERAL DE PERNAMBUCO)
Abstract:
The present work of research includes the preparation of 4XXX series aluminum alloys from elemental aluminum and silicon powders. Commercially pure (AA 1100) and metallic silicon (Si) powders in the percentages in mass of 5, 10 and 13% and with the time of 30, 60 and 120 minutes of HEBM processing. Percentage processed through high energy grinding techniques (MAE) using a Spex vibratory mill, cold uniaxial compaction and sintering, under nitrogen atmosphere and then characterization.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): SAUL HISSACI DE SOUZA (Universidade de São Paulo), Angelo fernando padilha (universidade de SÃo Paulo), rene ramos de oliveira (ipen)
Abstract:
Hot extruded bars of AA 7108 were characterized by using optical microscopy, scanning electron microscopy, Vickers microhardness mapping and texture analysis (by using both EBSD and X ray diffraction). The results show a full recrystallized microstructure, indicating the occurrence of dynamic recrystallization during the extrusion process. Regarding the texture analysis, a cube texture was found on the extruded surface (as usually expected), while a Goss texture was also found in the center of the bar.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Sergio Neves monteiro (IME MILITAR DE ENGENHARIA), Fabio da costa garcia filho (ime), fernanda santos da luz (ime), Carlos Luiz ferreira (ime), wagner anacleto pinheiro (ime)
Abstract:
Experimental torsion test results on macro copper single crystals, oriented with respect to the close-packed [111] direction, were compared to molecular dynamics simulation (MDS) of torsion on copper nanowire single crystals, oriented with respect to the [100] direction. This comparison permitted to validate the typical behavior of shear stress as a function of shear strain (or rotation angle). As expected, the nanowire stresslevels for a rotation angle of 360º, around 0.17 GPa at 700K up to 0.21 GPa at 30K are superior to those found in the experimental macro-crystals, varying from 0.48 GPa at 500K up to 0.094 GPa at 77K. In the MDS, after a suposed elastic deformation, dislocations are generated and multiplied. In the macro-crystals, transmission eléctron microscopy images disclosed the evolution of arrangements and density of dislocations.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): andre luis alvarenga andrade (ifes - instituto federal do espirito santo)
Abstract:
The work project consists to evaluate the behavior of niobium-based and titanium-based coatings related to individual properties and characteristics of each one after the welding process. These coatings are produced by Gas Metal Arc Welding (GMAW) process and have the same operational objective, which is intended to be a externally coat weld bands on pipes used in oil industry over well drilling procedures. Electrochemical polarization tests will be performed to analyze potentiodynamic polarization curves and microstructure also. Samples were characterized using Optical Microscopy (OM), Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), X-Ray Diffraction (XRD) and Confocal Laser Scanning Microscopy (CLSM) for surface relief/topography analyses. Based on the results obtained, the behavior of each coating and the chemical elements in the welded matrix are very different from each material, can be individualized.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Mateus CiríAco Amaral (Instituto Federal do Espírito Santo)
Abstract:
Non-destructive ultrasonic inspection is employed in the railroad industry to inspect in loco the rods and couplings that connect wagons to each other in order to detect critical cracks in the composition during predictive maintenance. The test requires care because not only cracks are detected, but also natural discontinuities of each part. Also, a repair workshop may contain multiple inspectors, a factor that introduces subjectivity to the process. An Artificial Neural Network can aid in the identification of critical discontinuities, given training based on previous analyzes. The aim of this study was to elaborate a Python-programmed model capable of predicting, using images obtained by the ultrasound equipment, the presence or not of critical cracks in each report. A database containing intensity values for each report (input variables), and binary values related to the existence or not of critical cracks (output variable) was elaborated from processing 1222 images generated by the Phasor XS (General Electric) equipment. The data recorded were inserted into a multi-layer perceptron network, of 20-36-1 configuration and logistic activations. Partial results point to a 97% prediction accuracy, value that is compatible with similar studies, and support-metrics that validate model learning.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): RICARDO OLIVEIRA COUTINHO (Anglo American), Marlon Fabio Marques Lino (Anglo American)
Abstract:
The present work deals with the application of a new conditional predictive maintenance technique, using infrared thermography, to monitor the life of the vertical windmill propellers of the Minas-Rio project, presenting an innovative inspection method, where a a thermographic behavior standard that indirectly defines the condition of wear of the propeller linings, thus being able to define the ideal moment for the replacement of the linings, guaranteeing the reliability of the equipment, the budgeted cost and the performance of the coating. Currently we have established a monitoring routine applying the technique of thermographic inspection, where from the collected data a report is generated that defines for PCM the ideal sequence for changing the coatings.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Saulo Brinco Diniz (CEFET-RJ), Kaio Ferreira dos Santo (CEFET-RJ), Carolina Alencar Caldeira de Souza (CEFET-RJ), Rafael Oliveira Santos (CEFET-RJ / UFF), Bruna Godoi Meirelles (CBA), Miguel Borodiak (CBA), Ana Carolina Brasil da Silva (CEFET-RJ), Rogério Albergaria de Azevedo Jr (CEFET-RJ), Niander Vargas Martins (CEFET-RJ)
Abstract:
The Friction Stir Welding - FSW is a solid state process where does not occur the localized melting of the material during welding, and due to this, several problems during the welding are eliminated. The aim of this paper was carry out initial tests on the weldability of 3104 aluminum and AZ31B magnesium with FSW, setting the rotational speed at 1380 rpm and an advance speed of 105 mm / min, with two different tools. It can be observed that the tool with the threaded pin and grooves in the shoulder, provided a better result in the welding of aluminum / aluminum and magnesium / magnesium sheets, but defects in the welded joint were still observed.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Thais Soares Gonçalves (REDEMAT/UFOP)
Abstract:
High Strength Low Alloy steel are used due to the benefits of higher line pressures, reduced tube weight and reduced risk of failure. The steel API 5L X65Q was chosen for this research due to its a higher limit value of mechanical strength, toughness and good weldability the manufacturing process for this steel grad consists of hot rolling, followed by heat treatments of quenching and tempering. The tubes can be welded by the process to the electric arc with coated electrodes (SMAW) and undergo inductive heating for bending and adaptation to the terrain topography. Such processes can alter the microstructure of constituents present in the weld metal and in the Heat affected zone. In this work the behavioural characteristics of the welded API 5L X65Q steel tube were assessed using mechanical tests, non-destructive tests and microstructural characterization of welded joints. Acicular ferrite, primary ferrite and small amount of inclusions were found in the welded region. The results of the tensile tests were not conclusive and due to the higher cooling rates developed; the microhardness values of the weld bead finishing region were higher than those of the other regions.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): VICTOR BARBOSA DE SOUZA (UFF / UNIREDENTOR / UENF), Alan albino de Azevedo (UFF / UNIREDENTOR / UENF), Tales Pereira Amorim (UFF / UNIREDENTOR / UENF), Niander Aguiar Cerqueira (UFF / UNIREDENTOR / UENF), Afonso Rangel Garcez de Azevedo (UFF / UNIREDENTOR / UENF), Daniel Passos Gallo (UFF / UNIREDENTOR / UENF), Geovana Carla Girondi Delaqua (UFF / UNIREDENTOR / UENF), Carlos Maurício Fontes Vieira (UFF / UNIREDENTOR / UENF)
Abstract:
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): vinícius dos santos dagostini (instituto federal do espírito santo - ifes vitória)
Abstract:
In this work was done a study of the hardness behavior of the heat affected zone (HAZ) of an API 5L X80 steel welded by the GMAW process. The welding of the specimens was done in such a way that 3 types of different welding energies were obtained and with that to analyze the microstructures present in each one. Through the microstructural characterization and the hardness measurements it was possible to observe that with the increase of the welding energy from 2,1 kJ/mm to 3,0 kJ/mm caused an increase in the thickness of the HAZ by 120% reaching 3,3 mm , in addition, the hardness went from an average of 233 HV to 250 HV, probably due to the formation of bainite and Widmanstätten ferrite.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): INGRID RUSSONI DE LIMA (UNIVERSIDADE FEDERAL FLUMINENSE), Mara Carolina do Carmo Paresque (UNIVERSIDADE FEDERAL FLUMINENSE), Gabrielle cristine lemos duarte freitas (universidade federal fluminense), Bonifácio de Oliveira Fialho (UNIVERSIDADE FEDERAL FLUMINENSE), Renata Antoum Simão (UNIversidade federal fluminense), JOSÉ ADILSON DE CASTRO (UNIVERSIDADE FEDERAL FLUMINENSE), GLAUCIO soares da fonseca (universidade federal fluminense)
Abstract:
A fibroin membrane was synthesized from the pure fibroin extract obtained from the silkworm cocoon. The pure fibroin extract from the silkworm cocoon was obtained commercially. From there it obtained a specific protocol where the extract is frozen in Falcon tubes and from the lyophilization for 2 consecutive days it obtains the fibroin in solid state with appearance of microcrystallites. A protocol heating was made and a coating was obtained on an inert polymeric substrate. The membrane is kiln dried for 5 days. The fibroin still in liquid phase of pure extract was analyzed by means of Rheology studies. In addition, the membrane was characterized by advanced techniques of physical-chemical characterization by DRX, SEM and AFM. The results showed that the rheological analysis of the liquid phase was consistent with the behavior of fibroin, the method of obtaining the membrane by lyophilization was adequate and promising, and the characterization showed the presence of semi-crystalline globules by DRX and morphology of adequate surface topography by SEM and AFM analysis. Thus, it was possible to obtain the standard fibroin membrane.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Alice de Souza Toffolo (IFRN-CNAT)
Abstract:
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Andréia Arenari de Siqueira (UENF), JONAS ALEXANDRE (UENF), AFONSO RANGEL GARCEZ DE AZEVEDO (UFF), LARISSA CAMPOS GRANATO (UENF), Ana Luiza Campinho Paes (UENF), Valber Domigos Pinheiro (UENF), SERGIO NEVES MONTEIRO (IME)
Abstract:
Paper is one of the most consumed products in the world and, for centuries, it is part of the daily life of humanity. However, the papermaking process ends up generating a large amount of industrial waste that bring environmental damage. With the increasing advance of the paper industry in the last years, there is an inevitable increase in waste from the production processes. Therefore, it is necessary to look for ways to recycle or reuse such waste in other industrial processes in order to mitigate environmental damage. Thus, this work aims to incorporate the primary sludge from paper industry into red ceramics, evaluating some properties, such as linear burning retraction, water absorption and flexural strength of prismatic ceramics specimens with incorporation levels of 0%, 2% and 5% of the waste in substitution of the clay in the ceramic mass. The specimens were burned at 800 and 900°C, being the results analyzed and compared to other studies, indicating that it is feasible the incorporation of the waste in ceramic pieces
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Beatriz Baiôcco Louzada (universidade federal de viçosa), Carolina de Souza Pires Costa (universidade federal de viçosa), pedro henrique cota drumond (universidade federal de viçosa), beatryz cardoso mendes (universidade federal de viçosa), leonardo gonçalves pedroti (universidade federal de viçosa)
Abstract:
Currently, one of the biggest environmental problems in Minas Gerais is the storage of washed tailings, derived from mining, in dams. In order to reduce this impact, the present work aims to reuse bauxite mining tailings to produce ceramic bricks. To obtain a material with good cohesion and plasticity for pressing and extrusion, a clay soil was mixed with the working material and the manual pressing of cylindrical samples, with 10% humidity and different tailings proportions, was done. After firing, the properties of linear shrinkage, water absorption index, apparent porosity, bulk density and compressive strength were evaluated. The results show that the production of solid bricks, with the addition of up to 10% of bauxite and pressed from the mixture between tailings and yellow clay, is feasible both from an environmental and technical points of view, meeting the Brazilian specifications for such product.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): danúbia bordim de carvalho (instituto militar de engenharia), gabriela azevedo loureiro (instituto militar de engenharia ), camila oliveira baptista (instituto militar de engenharia ), leticia dos santos aguilera (instituto militar de engenharia ), josé brant campos (universidade do estado do rio de janeiro), ronaldo sérgio de biasi (instituto militar de engenharia ), andré ben-hur da silva figueiredo (instituto militar de engenharia )
Abstract:
Copper and lead mixed ferrite (Cu-Pb) with a spinel structure, was synthesized using the combustion method, with PbxCu1-xFe2O4 (x = 0.0, 0.1, 0.2) stoichiometry. The structural characterization was performed using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that the copper ferrite (x = 0.0) is formed by the cubic spinel structure and x = 0.1 and 0.2 are formed by the structure of the tetragonal spinel.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): EUZEBIO BERNABE ZANELATO (uenf), Jonas Alexandre (uenf), Afonso Rangel Garcez de Azevedo (uff), Markssuel Teixeira Marvila (uenf), Sergio Neves Monteiro (ime), Giovani Bruzzi (uenf), Gustavo de Castro Xavier (uenf), Thuany Espírito Santo de Lima (uenf)
Abstract:
Adhesion, the main property of mortars, is evaluated by horizontal manual launches of the mortar on the substrate in order to reproduce the real conditions. This launch condition, however, presents great dispersion due to the lack of homogeneity in the launching. The objective of this work is to evaluate the substitution of manual horizontal launch by vertical launching by fixed heights. The evaluation was performed by adhesion tests with the two forms of launching, eight different drop heights and two traces of mortars. The mortars and substrates used were also characterized as well as microscopic verification of adhesion tests. The results indicated that the height of 1.2m represents the best relationship with the horizontal launch, in addition, the dispersion of the results using vertical launching was significantly reduced. It can be concluded that the vertical launch is feasible to reproduce the horizontal launch homogeneously
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): EUZEBIO BERNABE ZANELATO (uenf), Antonio Márcio de Araújo Macedo (ucam), André Luís Flor Manhães (ucam), Afonso Rangel Garcez de Azevedo (uff), Markssuel Teixeira Marvila (uenf), Sergio Neves Monteiro (ime), Jonas Alexandre (uenf), Lúcio José Terra Petrucci (ucam)
Abstract:
The construction industry is the human activity that consumes the most natural resources. This occurs from before the beginning of the work, with the extraction of minerals to make aggregates and cement. Considering the high consumption of materials in the construction and the durability of the buildings, the continuous generation of RCD (Waste of construction and demolition) presents itself as a problem. The objective of this work is to verify the influence that the incorporation of RCD promotes in the properties of mortars. The RCD was incorporated into 50% and 100% replacement of natural sand. Materials and mortar characterization tests were carried out by consistency tests, water absorption by immersion, water absorption by capillarity, compressive strength and tensile strength in flexion. The tests indicated that the presence of RCD improves the performance of these mortars, increasing their resistance and decreasing their water absorption
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): fernanda thamiles de jesus serrão (Universidade federal do pará), jéssica brito rocha (universidade federal do pará), Jhonny dos Santos Ramos (universidade federal do pará), Edemarino Araujo Hildebrando (universidade federal do pará)
Abstract:
Micaceous materials, due to their structures, may have good adsorptive properties. The present study aimed to evaluate this property of micaceous materials synthesized from Amazonian kaolin. This synthesis was divided in two periods, one in the period of 24H and the other in the period of 48H, at 150°C, resulting in two materials for evaluation: MSC24 (mica synthesized from calcined hard kaolin - 24H) and MSC48 (mica synthesized at from calcined hard kaolin - 48H). The starting material and the phases formed as reaction product were characterized by X-ray diffraction. For better analysis, the adsorption test was also carried out on the kaolin hard in natura and calcined at 700°C for comparative parameters. For qualitative evaluation in the adsorption process, aqueous solutions with well defined concentrations of 10 mg/L, 20 mg/L, 50 mg/L and 100 mg/L of methylene blue dye were used. The ability of the samples to remove the dye from aqueous solutions was evaluated by the batch method. Responding satisfactorily to the objective, the synthesis materials showed good adsorption.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): FRANCILENE DA LUZ BELO (UFPA), CAMILLY PERES GONÇALVES (UFPA), VERÔNICA SCARPINI CÂNDIDO (UFPA), ALISSON CLAY RIOS DA SILVA (UFPA), JHEISON LOPES DOS SANTOS (UFRRJ), SÉRGIO NEVES MONTEIRO (IME), ESLEANE VILELA VASCONCELOS (UFPA)
Abstract:
The objective of this study was to produce and characterize microstructureally hydroxyapatite by wet method through acid-base reactions at 1.5 molar molarity. The method for obtaining the HA powder was the precipitation technique, by the wet method by acid-base reaction between calcium and phosphorus precursors. It was characterized by MEV and EDS; DRX and FTIR. The method allowed obtaining a structured calcium phosphate powder from which the hydroxyapatite was obtained. It was possible to observe an AH of irregular shape, with fine particles and agglomerated, with presence of associated phases of HA and calcium oxide. It was also observed the presence of bands that characterize the HA phase, showing clusters of PO43- and OH in higher intensity and CO32- and H2O in lower intensity
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): lanna hannah de sousa gomes (universidade federal do pará), sergio neves monteiro (instituto militar de engenharia), alisson clay rios da silva (universidade federal do pará), verônica scarpini cândido (universidade federal do pará)
Abstract:
The study aimed to characterize a clayey mixture composed of weak and strong clay, together with blast furnace slag. The raw materials were analyzed by optical and scanning microscopy with determination of their plasticity and TG / DTG curves for the four formulations (mixture between the strong and weak clays and addition of 10%, 20%, 30% by weight of slag). The research indicates that the blast furnace slag, because it presents coarser particles than the clays, contributes to improve the degree of packing of the particles, favoring the drying step besides controlling the dimensions of the pieces. The results presented great importance for the ceramic industry in the production of blocks, besides indicating that the weak clay contributes to the decrease of the plasticity of the strong clay.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Mariana Gomes Pinto Cherene (UCAM), AFONSO RANGEL GARCEZ DE AZEVEDO (UFF), Marilucia dos Santos Silva (UCAM), Diogo Pereira dos Santos (UCAM), Markssuel Teixeira Marvila (UCAM), SERGIO NEVES MONTEIRO (IME), Lúcio José Terra Petrucci (UCAM)
Abstract:
The use of glass residue has been researched in order to minimize the impacts generated by it. In view of this, it is possible to identify significant advances in the use of glass residue in cement matrixes, favoring the sustainable destination of the waste and reducing the consumption of cement, due to its partial replacement. Results of the use of the glass residue with mass substitution in fractions of 0, 5, 10, 15 and 20% in relation to the cement in the multiple-use mortars were presented. For the mortars produced, the consistency index, incorporated air content, density and water retention were evaluated. In view of the results, it can be concluded that the use of the residue as an addition in mortars, provided results that kept proportional the amount of water and that of added residue and that the increase of the incorporated air content consequently reduces the specific mass
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): MARKSSUEL TEIXEIRA MARVILA (uenf), afonso rangel garcez azevedo (uenf), euzébio bernabé zanelato (uenf), thuany espirito santo (uenf), jonas alexandre (uenf), sergio neves monteiro (ime), laimara barroso da silva (uenf), giovanni bruzzi guarçoni (uenf)
Abstract:
Due to the complexity of the behavior of the mortars and of the different properties evaluated in the study of this material, a technique of hierarchical analysis of weights (HAW) was used to verify the trawling compositions considering the importance of each property of this material. Two sets of data were extracted from works in the bibliography for the application of HAW. The results obtained demonstrate a possibility of using the technique that does not respect the evaluation of the behavior of coating mortars
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): MARKSSUEL TEIXEIRA MARVILA (ucam), afonso rangel garcez azevedo (ucam), juliana pessanha reis (ucam), euzébio bernabe zanelato (uenf), lucio petrucci (ucam), jonas alexandre (uenf), sergio neves monteiro (ime), daiane cecchin (uff), Thuany Espírito Santo Lima (ucam)
Abstract:
The use of cementitious composites is widely carried out in scientific research. In this context the objective of this work was to evaluate two forms of pineapple fiber treatment for the use of this material as reinforcement of mortars. Treatments were performed with 10% NaOH solution at room temperature and at boiling temperature. In addition, specimens containing fibers treated by the two methodologies were made. The density of the hardened state, flexural tensile strength and compressive strength were tested. The results confirm that the proposed thermal treatment technique is effective, whereas the technique with treatment at room temperature is not recommended.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): MARKSSUEL TEIXEIRA MARVILA (uenf), afonso rangel garcez azevedo (uff), euzébio bernabé zanelato (uenf), Thuany Espírito Santo Lima (uenf), jonas alexandre (uenf), sergio neves monteiro (ime), thais pirovane miguel (uenf), Niander Cerqueira Aguiar (uniredentor), Vitor Barbosa de Souza (uniredentor)
Abstract:
The study of adhesion property is very important for mortars since it defines where the material will be applied. The objective of this work was to evaluate the adhesion of mortars of two different compositions, 1: 1: 6 and 1: 2: 9 (cement: hydrated lime: sand), using two different equipments, one manufactured by Alfa instruments and another by Solotest. The results confirm the equivalence between the two instruments and help to verify the application of the 1: 1: 6 and 1: 2: 9 traces in coating mortars
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): aDRIANE PIMENTEL OLIVEIRA (UNIVERSIDADE FEDERAL DO PARÁ), ANTÔNIO MATEUS DARWICH BARRA (Universidade Federal do Pará)
Abstract:
Currently, the development of sustainable products has grown too much in the world market. Since then, in several industrial sectors, it is possible to observe the use of an "eco-technological" form for the manufacture of products and consumer goods. Through this research, following the line of new alternatives, it was possible to develop a non-polluting cement with clay and charcoal ashes, materials used with environmental responsibility, since industrial cement generates large socio-environmental impacts. This paper presents the development of a composite produced with charcoal ash from the wood stove, common practice in the village of Bacuriteua, in Santarém Novo / PA, and with clay. The development of this material is advantageous due mainly to production, with less cost-benefit, and which aims, for example, to leave the industry as a non-polluting product. The experiment, presented later, showed satisfactory results in relation to the properties of the material, in which these resembled those of the industrial cement, thus allowing a possible larger scale application and with less expense for the civil construction sector.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Afonso rangel garcez de azevedo (uff), Markssuel Teixeira Marvila (uenf), Euzébio Barnabé Zanelato (uenf), Thuany Espirito Santo Lima (uenf), jonas alexandre (uenf), Victor Barbosa (facredentor), Beatryz Cardoso Mendes (ufv)
Abstract:
Civil construction consumes a great quantity of materials of diverse types and sources of generation, this makes with whom this sector generates large amounts of solid waste that must be properly discarded, generating costs to the process. Glasses are widely used in the activities of the construction industry, and other sectors, and has in its production process the generation of waste in the lapidating stage of the glass, generating the Glass Sanding Residue (RLV). The objective of this work was to evaluate the effect of wetting and drying cycles on the durability of mortars for laying and coating, evaluating the loss of mass and mechanical resistance after three different cycles (30, 60 and 90 days). Prismatic specimens with 1: 1: 6 mortar (cement: lime: sand) were performed comparing the incorporation at levels of 0, 5 and 10% of RLV in replacement of hydrated lime. The results showed that the mortar incorporated with 10% is the better behavior against the cycles of greater time, being the most recommended for application in the civil construction
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Afonso rangel garcez de azevedo (uff), Markssuel Teixeira Marvila (uenf), Euzébio bernabe zanelato (uenf), Thuany Espirito Santo Lima (uenf), jonas alexandre (uenf), Gustavo de Castro Xavier (uenf), Leonardo Gonçalves Pedroti (ufv)
Abstract:
Brazil is a country of continental dimensions and therefore has a great variability of its territory, consisting of climatic and morphological variations. A large part of the Brazilian population lives in coastal cities, where their buildings are extremely subject to the action of saline mist, which can be detrimental to the facade cladding. On the other hand, the glass production industry generates large amounts of waste in the lapidation stage, the Glass Sanding Waste (GSW). The objective of this work is to evaluate the effect of exposure to the saline environment on the durability of mortars for block laying and coating of walls and ceilings using RLV in partial replacement of lime, evaluating the loss of mass, mechanical resistance and adhesion after immersion in cycles of saline fog. Prismatic specimens with 1: 1: 6 mortar (cement: lime: sand) were performed comparing the incorporation at 0, 5 and 10% levels of RLV in replacement of hydrated lime. The results showed that the incorporated mortars with 5% are the ones that present better behavior against exposure to the saline environment, being the most recommended for application in civil construction
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): KARLA SUELLEN LINO BARBOSA (UNIVERSIDADE FEDERAL DO PARÁ), Ana Caroline de Miranda LimA (UNIVERSIDADE FEDERAL DO PARÁ), Bruno Henrique Alves Mendes (UNIVERSIDADE FEDERAL DO PARÁ), Iara Ferreira Santos (UNIVERSIDADE FEDERAL DO PARÁ), Deibson Silva da Costa (UNIVERSIDADE FEDERAL DO PARÁ), José Antônio Silva Souza (UNIVERSIDADE FEDERAL DO PARÁ)
Abstract:
Waste is being used in the manufacture of composite materials in order to obtain good physical-mechanical properties and sustainable development. Therefore, composite materials of polymeric matrix with marble and granite residue load were manufactured in 100 mesh granulometry using the hand lay-up method. For each series five (5) test specimens were produced. The polymer matrix showed proportions of 1.5% accelerator and 1% catalyst. The marble and granite residue proportions are 5, 15 and 25%. The physical characteristics of these materials were evaluated through ASTM D-792, water absorption (ASTM D-570) and apparent porosity (ASTM D-2734), as well as horizontal flambility tests (ASTM D-635 ) and tensile strength (ASTM D-3039). The results show a reduction of approximately 48% in the flame propagation in the proportion of 25% of the residue, for the results of tensile strength the composite with 10% of residue presented the best mechanical performance, indicating good economic and environmental impacts
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): KARLA SUELLEN LINO BARBOSA (universidade federal do pará), Bruno Henrique Alves Mendes (UNIVERSIDADE FEDERAL DO PARÁ), Iara Ferreira Santos (UNIVERSIDADE FEDERAL DO PARÁ), Deibson Costa da Silva (UNIVERSIDADE FEDERAL DO PARÁ), José Antônio Silva Souza (UNIVERSIDADE FEDERAL DO PARÁ)
Abstract:
In search of a better destination for industrial waste, researchers have developed materials using residual load in combination with plant fibers to obtain a material with good physical-mechanical properties. In this way, hybrid composites of isophthalic polyester matrix with marble and granite residue load were produced in the 100 mesh granulometry and the insertion of jute fiber strands in the length of 15 mm using the hand lay-up method. Five specimens were produced for each series. The polymer matrix showed proportions of 1.5% accelerator and 1% by volume catalyst. The inserted fibers had a fixed value of 5%, varying the proportions of residue in 5, 15 and 25% in mass. (ASTM D-792), water absorption (ASTM D-570) and apparent porosity (ASTM D-2734), as well as the flame resistance tests (ASTM D-635) and mechanical tensile strength (ASTM D-3039). The composites with marble and granite residue presented a good performance in the flame resistance, presenting a reduction of approximately 24% in the proportion of 5% of residue / 5% of fibers, for the results of tensile strength the composites behaved as filling, reducing the mechanical strength of composites
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): LUCAS REZENDE ALMEIDA (Universidade federal do pará), Gabriel da Cruz Oliveira (UNIVERSIDADE FEDERAL DO PARÁ), Willian Rayol da Silva (UNIVERSIDADE FEDERAL DO PARÁ), Bruno Henrique Alves Mendes (hydro), Brenda Thayssa Figueira Daniel (UNIVERSIDADE FEDERAL DO PARÁ), Denilson da Silva Costa (UNIVERSIDADE FEDERAL DO SUL E SUDESTE DO PARÁ), Deibson Silva da Costa (UNIVERSIDADE FEDERAL DO PARÁ)
Abstract:
Due to the environmental impact caused by the disposal of industrial waste and its application in new materials, the present work presents the results of the study and exploitation of iron ore residues as reinforcement for the composite of polyester polymer matrix. The mass proportions of waste iron ore used varied between 10 %, 20 % and 30 % with granulometry of 100 mesh. The composite manufacturing method was the hand lay-up in metallic mold with pressure of 25 kN. The matrix used was isophthalic polyester resin, cobalt based accelerator (1.5 %) and primer MEK-P (Butanox M-50) at (1 %) volumes. Physical and thermal mechanical tensile tests were performed according to ASTM 3039, NBR 12766 and ASTM 635 respectively. The best tensile tensile strength was obtained in the composition of 10 %. The physical properties apparent porosity and apparent specific mass increased and water absorption decreased as the compositions rose. The flammability test specimens showed flame retardancy when compared to standard recommendations, and compositions of 20 % and 30 % erased the flame.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): MARIA JOSE SANTOS LIMA (universidade federal do rio grande do norte)
Abstract:
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Maria Luiza Pessanha Menezes Gomes (Universidade Estadual do Norte Fluminense Darcy Ribeiro)
Abstract:
Currently, research aimed at developing new materials through recycling and the use of raw materials that attack the least possible environment are important, given the large amount of waste generated by society. The use of residues from ornamental rocks, as well as the use of polymer from a renewable source for the manufacture of artificial stone is an alternative for the creation of a technically feasible material, in addition to minimizing environmental problems, since it aims at reducing waste and the use of biodegradable polymer. This research aims to produce and characterize an artificial stone with white granite and polyurethane residue, from castor oil, in order to be used in the construction industry. To do this, a mixture was made with both and transferred to a metal mold under vibration and vacuum and then compressed. The stones were submitted to water absorption tests, apparent porosity, density, abrasive wear, three point bending test, and microstructural analysis. The material produced showed good mechanical resistance, within the expected range as well as its physical properties when compared with other artificial stones. Factor proven by good load/matrix adhesion through micrographs
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Paulo augusto timbó vilela (Autônomo)
Abstract:
The software available in the market are diversified, however the results presented by each of them seek the design with safety or economy, because they are factors conflicting with each other. Due to several questions raised by professionals and academics of civil engineering, this work aims to present a comparative study through the realization of manual structural calculation in reinforced concrete beam, and using three software available in the market, such as EberickV10, CypeCAD, and AxisVM13, which uses finite elements, however, it does not yet have Brazilian norm in its literature, which allows comparison with software that uses only foreign norm. The obtained values of the reinforcement density of the upper deck V02 beam were compared to the manual and computerized methods, dividing the V02 beam into three sections to better specify the difference presented in each method, the choice of sections was due to critical moments in life. The most expressive result of reinforcement density was presented for manual calculation, following the software EberickV10, which presents better security and much lower arrow results, however distancing itself from the economy, increasing its cost as a result of the comparison of the budget.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Pedro henrique tiago leite (uemg/curso de engenharia civil/estudante de engenharia), ramon rodrigues de miranda (UEMG/CURSO DE ENGENHARIA CIVIL/ESTUDANTE DE ENGENHARIA), ivan de sá da fonseca (UEMG/CURSO DE ENGENHARIA CIVIL/ESTUDANTE DE ENGENHARIA), thiago richard sena ribeiro (UEMG/CURSO DE ENGENHARIA CIVIL/ESTUDANTE DE ENGENHARIA), leonardo lúcio de araújo gouveia (UEMG/CURSO DE ENGENHARIA CIVIL/professor), ricardo luiz perez teixeira (unifei/iei/professor do curso de engenharia de materiais)
Abstract:
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): rodolfo Moura de souza lima (Universidade federal do pará), Miriane Alexandrino Pinheiro (Universidade Federal do Pará ), Simone Patrícia Aranha da Paz (Universidade Federal do Pará ), Sérgio Neves Monteiro (Instituto Militar de Engenharia ), Alisson Clay Rios da Silva (Universidade Federal do Pará ), Verônica Scarpini Candido (Universidade Federal do Pará )
Abstract:
The incorporation of lignocellulosic fibers as reinforcement in composite materials has been widely investigated in recent years, this is due to its low cost, biodegradability and performance equal or higher when compared there are synthetic fibers. It belongs to the family of Marantaceae, genus Ischinosiphon Koern, the Guarumã is a plant in large quantity of the floodplain region in the state of Pará, widely used for the manufacture of local handicrafts. In this sense, as analyses were performed through the X-ray Diffractometer (XXX), Fourier Transform infrared spectrophotometer (FTIR), and the surface of the fibers was evaluated by scanning electron microscopy (SEM). The results of the DRX showed that, the Guarumã fibers have amorphous characteristics, with only a crystalline peak referring to cellulose and from the analysis by FTIR, it was possible to observe functional groups characteristic of lignocellulosic fibers, As already observed in other studies, in the micrograph obtained by SEM, it was possible to realize that the surface of the fibers is irregular and with few defects. In front of Hallan, it can be concluded that Guarumã fibers have potential for use in composite materials.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Thaís Pirovane Miguel (UENF), JONAS ALEXANDRE (UENF), afonso rangel garcez de azevedo (uff), Euzébio Barnabé Zelanato (uenf), Giovanni Bruzzi Guarçonir (uenf), Markssuel Teixeira Marvila (uenf), Sergio Neves Monteiro (ime)
Abstract:
Civil engineering, with its works and constructions, has a major impact on the environment, both in terms of withdrawing its natural inputs as raw material, such as sand for example, and in causing various environmental problems, such as soil pollution, atmospheric pollution, contamination of rivers, and numerous other problems. Parallel to this, industries in various sectors have been generating more and more solid waste, which causes high costs for proper disposal, and therefore, are often discarded in the environment, which entails numerous damages to this. Thus, the present work has the objective of evaluating the water absorption by capillarity and density of cement and lime mortars for laying blocks and covering walls and ceilings, with replacement of sand by ornamental rock residue, in different percentages. The ornamental rock residue was collected in wet mud form, directly in the processing parks. In the laboratory, the residue was properly treated for use in mortars, the sand was sieved - # 10 the Hydrated Lime used was type III (CHIII) and Portland cement type II (CPII). The amount of water in each trace was determined by the consistency test. A reference trace (1: 1: 6 by volume) was performed. Then, traces of sand substitution by residue in 20%, 40%, 60%, 80% and 100% were used for the production of prismatic specimens (40 x 40 x 160 mm). The prepared specimens were submitted to capillary water absorption tests. The results showed that, as expected, the residue fulfills the role of effect filler in the mortar by up to 40% of substitution, being, therefore, the ideal trait of increment of residue, with its improved properties
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Valber Domingos Pinheiro (UENF), Jonas Alexandre (UENF), AFONSO RANGEL GARCEZ DE AZEVEDO (UFF), Thuany Espírito Santo de Lima (UENF), Ana Luiza Campinho Paes (UENF), Andréia Arenari de Siqueira (UENF), Larissa Campos Granato (UENF)
Abstract:
The present work presents a comparative study between grained prisms with concrete conventionally used as grate and grained prisms with concrete of low resistance and density being compared with non - grained prisms. Thus conventional and lightweight grates were made using expanded clay as aggregate and air incorporating additive. The traces were studied both in their fresh and hardened state and were applied in the filling of 2-row prisms and afterwards the compression was tested, observing their ultimate strength, rupture modulus and displacement behavior. The results show different behaviors among the studied prisms, where the prism grazed with light concrete presents better performance
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): VICTOR BARBOSA DE SOUZA (UFF / UENF / UNIREDENTOR), Heitor Braga Ferreira (UFF / UENF / UNIREDENTOR), Rômulo Simiquel Lobato (UFF / UENF / UNIREDENTOR), Niander Aguiar Cerqueira (UFF / UENF / UNIREDENTOR), Amanda Camerini Lima (UFF / UENF / UNIREDENTOR)
Abstract:
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): VICTOR BARBOSA DE SOUZA (UFF / UENF / UNIREDENTOR), Gabriela Medeiros Sant’Ana (UFF / UENF / UNIREDENTOR), Gabriel Sobreira Figueira (UFF / UENF / UNIREDENTOR), Thiago José Estevanin de Moura (UFF / UENF / UNIREDENTOR), Cristiano Pena Miller (UFF / UENF / UNIREDENTOR), Amanda Camerini Lima (UFF / UENF / UNIREDENTOR)
Abstract:
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): VICTOR HUGO MAFRA MONFREDO FERREIRA (Universidade federal do pará), eryck eduardo SIMPLÍCIO dos santos (universidade federal do pará), Mario Henrique Moreira de Moraes (universidade federal do pará), Brenda Thayssa Figueira Daniel (universidade federal do pará), denilson da silva costa (Universidade Federal do Sul e Sudeste do Pará ), Deibson Silva da Costa (universidade federal do pará)
Abstract:
Polymer matrix composite materials were made using industrial fly ash waste. The mass proportions of the flying ashes, waste are varied between 0 %, 10 %, 20 % and 30 % with granulometry of 100 and 200 mesh. Isophthalic polyester resin was used with a cobalt accelerator (1.5% v / v) and catalyst (1% v / v). The composites were manufactured based on a manual "hand lay up" lamination process. The composites were tested according to the physical with standards NBR 12766, as well as tensile with ASTM D 3039 and flammability (ASTM D 635) tests. The physical properties water absorption, apparent porosity and bulk density increased as the composites increased. For all the composites, the residue acted as a reinforcement agent on the matrix, demonstrating an increase of their resistance to the traction in relation to the 0 % composites. The wastes acted as flame retardants in composites specially for 200 mesh
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): WENDELL BRUNO ALMEIDA BEZERRA (ime), Ulisses oliveira costa (ime), Suzana barreto noronha ribeiro (ime), Fernanda santos da luz (ime), Marcelo henrique prado da silva (ime), sergio neves monteiro (Ime)
Abstract:
In recent years, the utilization of collagen in tissue engineering has grown due to the increasing knowledge about this material. Amongst the alternative sources of collagen, one to be considered is the fish collagen (FC). Therefore, the objective of this work was to evaluate the efficiency of the chemical treatment in acid medium applied to the pirarucu scales, in order to remove the hydroxyapatite nanocrystalline phase, obtaining pure collagen. To this end, the scales were immersed in a dilute acid solution of HCl (0.6N) for 5 days. SEM and FTIR analyzes were performed to evaluate the efficiency of the treatment. The obtained electromicrographs allowed to verify the alteration of the surface morphology of the scales, while the FTIR spectra confirmed the presence of collagen type I and the almost total removal of the hydroxyapatite, evidencing the efficiency of the proposed method.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): WENDELL BRUNO ALMEIDA BEZERRA (IME), Ulisses oliveira costa (ime), suzana barreto noronha ribeiro (ime), michelle oliveira costa (ime), fernanda santos da luz (ime), marcelo henrique prado da silva (ime), sergio neves monteiro (ime)
Abstract:
In past years, the need for innovative products aimed at replacing, correcting and improving poorly performing tissues in humans or animals has increased with the development of technology. Considering this, the collagen stands out given its positive characteristics in its applications in tissue engineering. Fish collagen (FC) is found to be an interesting alternative source of this material. Thus, the objective of this work was to study the influence of the chemical treatment of pirarucu scales in acid solution, aiming to remove the present hydroxyapatite nanocrystals, in order to obtain pure collagen. To this end, a dilute acid solution of HCl (0.6N) was prepared, and the scales were immersed for 5 days. SEM and XRD analyzes were used to verify the treatment efficiency. Through the obtained electromicrographs, one could verify the alteration of the surface morphology of the scales, while the diffractograms confirmed the presence of the peaks related to the hydroxyapatite in the in natura scales and the absence of these in the treated scales, proving the partial or total removal of that phase.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): WESLEY DE OLIVEIRA SILVA (IME MILITAR DE ENGENHARIA), MAttheus torquato (IME MILItar de engenharia), André Ben-Hur da Silva Figueiredo (IME MILITAR DE ENGENHARIA), Wagner Anacleto Pinheiro (IME MILITAR DE ENGENHARIA), Luiz Eduardo Pizarro Borges (IME MILITAR DE ENGENHARIA)
Abstract:
This work aims to produce and characterize CoFe2O4 / rGO nanocomposite obtained by direct synthesis by hydrothermal reaction (SDRH). In the characterization, X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and atomic force microscopy (AFM) were used. Using the techniques, it was possible to prove the synthesis and formation of the CoFe2O4 nanoparticles (NPs) that were deposited on the sheets of reduced graphene oxide (rGO) forming the CoFe2O4 / rGO composite. In addition, the nanoparticles showed good dispersion on the leaves of rGO with average particle size between 5 and 17 nm
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): ANDERSON OLIVEIRA DA SILVA (IME - INSTITUTO MILItar de engenharia), Karollyne Gomes de Castro Monsores (IME - INSTITUTO MILITAR DE ENGENHARIA), Suzane de Sant’ Ana Oliveira (IME - INSTITUTO MILITAR DE ENGENHARIA), Géssica da Silva Nicolau (IME - INSTITUTO MILITAR DE ENGENHARIA), Pedro Guilherme Sousa Passalini (IME - INSTITUTO MILITAR DE ENGENHARIA), Ricardo Pondé Weber (IME - INSTITUTO MILITAR DE ENGENHARIA), Sérgio Neves Monteiro (IME - INSTITUTO MILITAR DE ENGENHARIA)
Abstract:
The present work evaluates the structural and superficial changes in the polyaramide fiber exposed to different times and doses of ultraviolet and gamma radiation. This study aims to identify if possible changes in the macromolecule cause a decrease in properties or not. This evaluation was carried out by physical-chemical analyzes of Fourier transform infrared spectroscopy (FTIR), by thermogravimetric analysis (TGA) and by scanning electron microscopy (SEM), before and after the two-time exposure of ultraviolet radiation and two different doses of gamma radiation. The results showed that the times and doses of ultraviolet and gamma radiation do not lead to significant structural changes in the polyaramid fiber.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Débora de Lima Alves (IME instituto militar de engenharia), Luana Cristyne da Cruz Demosthenes (ime instituto militar de engenharia), Amal Elzubair (UFRJ Universidade Federal do Rio de Janeiro), Sérgio de Souza Camargo Jr (UFRJ Universidade Federal do Rio de Janeiro), Ricardo Pondé Weber (IME INSTITUTO MILITAR DE ENGENHARIA)
Abstract:
This works aims to analyze the tribological and thermal properties of dark caucasian hair virgin and bleached. The sliding friction, dehydration and degradation temperature were used to evaluate the material. The hair tresses were submitted to three conditions of tests: dry, wet, treated with pomade-type. The results show that bleached hair suffers degradation and the pomade-type treatment is only temporarily efficient as a modelling pomade, but it is not effective in the long term because it does not repair the hair fiber.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): elisângela da silva ferreira (UNIVERSIDADE FEDERAL DO PARÁ), verônica scarpini cândido (universidade federal do pará), simone patrícia aranha da paz (universidade federal do pará), alisson clay rios da silva (universidade federal do pará), sergio neves brito (instituto militar de engenharia21), caio cesar amorim de melo (universidade federal do pará)
Abstract:
The green banana peel has a healing effect apparently due to the tannins present in the green bark, due to its anti-inflammatory and antimicrobial properties. This work aims to study the microstructural properties of the green banana peel to make a biomaterial, due to its antibactericidal and healing effect. XRD analyzes were performed on the X'Pert Pro 3 MPD (PW 3040/60) PANalytical X-ray diffractometer and Fourier Transform Infrared Spectroscopy (FTIR) spectroscopy was performed using a spectrometer Thermo Scientific, model Nicolet iS50. The samples were analyzed in the medium infrared spectral region (MIR) of 4,000-400 cm -1. The results evidenced in the XRD showed that the material was amorphous and did not show peaks and bands. The FTIR allowed the detection of a larger set of spectral band variables in the range of approximately 1600 to 753 cm -1 suggesting an organic nature. After the characterization of the banana peel, it can be inferred that this work allowed to know the components of the material and, based on softwares and available literature, allowed their comparison with other studies, data networks and crystallographic chips
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): ESLEANE VILELA VASCONCELOS (UNIVERSIDADE FEDERAL DO PARA), francilene da luz belo (universidade federal do pará), Sérgio Neves Monteiro (Instituto Militar de Engenharia), Alisson Clay Rios da Silva (UNIVERSIDADE FEDERAL DO PARÁ), Verônica Scarpini Candido (UNIVERSIDADE FEDERAL DO PARÁ)
Abstract:
Biomaterials are a field of application of polymeric and composite materials and defined as materials intended to have an interface with biological systems for treating, recovering or replacing tissues, organ or body function. The fruit of the açaí, much consumed in the northern region of Brazil, generates a large volume of residue from the fruit's core. Research already points out its numerous benefits and applications to the health of the body. Thus, the objective study characterize the açaí core for study purposes as biomaterial. X-ray diffraction (XRD), Fourier Transform Infrared Spectrometry (FTIR) and Scanning Electron Microscopy (SEM) were used for characterization. The material presented a cellulose characteristic.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): JOãO FREIRE DE MEDEIROS NETO (UFRN), Ivan Alves de Souza (Labplasma-UFRN), Thércio Henrique de Carvalho Costa (UFRN), Michelle Cequeira Feitor (UFRN), Antonia Karla Paixão Silveira (UFRN)
Abstract:
The work used the dielectric barrier discharge (DBD) technique for surface modification of high density polyethylene (HDPE). The treatments were made in argon or oxygen for 10 minutes at a frequency of 820 Hz, voltage of 20 kV, 2 mm distance between electrodes and atmospheric pressure. Plasma efficiency was measured using a Langmuir triple probe to verify that it had sufficient energy to promote possible chemical changes on the surface of the material. The physico-chemical changes were diagnosed through a surface characterization technique such as contact angle, attenuated Fourier Fourrier Fourier Transform (FTIR-ATR) spectroscopy, and X-ray excited photoelectron spectroscopy (XPS). The plasma electron temperature showed that it has sufficient energy for the breaking or formation of chemical bonds on the surface of the material, directly impacting the wettability of the same. The wettability test was done before and after the treatment through a sessile drop using distilled water, glycerin and dimethylformamide to trace the surface tension profile by the fowkes method, analyzing the variation of the contact angle. The FTIR-ATR and XPS showed the groups and bonds that were altered or generated superficially when compared to the untreated sample
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): JOAO VINICIUS DE SOUZA VARES (UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUl), Robson oliveira goes (Universidade federal do rio grande do sul), Alvaro meneguzzi (universidade federal do rio grande do sul)
Abstract:
Organic coatings - paints and varnishes - are used since the decoration to protect against corrosion of metallic materials, such as steel, which is quite susceptible to corrosive processes. The main components of the organic coatings are: resin, solvent, additives and pigments (absent in the varnishes). The abject of this work was the accelerated degradation - in the humid and UV chambers - of the epoxy varnish applied to the 1006 steel surface. Samples were prepared following the following steps: washing, degreasing, drying and coating the steel with varnish immersion method. After curing the varnish, some samples were analyzed and others were placed in the chambers. At the end of 3000h in wet chamber and 2800h in UV chamber the samples were taken for analysis thickness, roughness, adhesion, contact angle and visual aspect. The results showed that the thickness of the varnish did not change after degradation, that the roughness, adhesion and contact angle were more affected in the wet chamber degradation test and that only in the UV chamber test did the color of the varnish was changed. That said, it can be concluded that in general the epoxy varnish was less affected in the UV chamber.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): KAROLLYNE GOMES DE CASTRO MONSORES (IME INSTITUTO MILITAR DE ENGENHARIA), Anderson Oliveira da Silva (IME INSTITUTO MILITAR DE ENGENHARIA), Suzane de Sant’ana Oliveira (IME INSTITUTO MILITAR DE ENGENHARIA), Géssica da Silva Nicolau (IME INSTITUTO MILITAR DE ENGENHARIA), Débora de Lima Alves (IME INSTITUTO MILITAR DE ENGENHARIA), Ricardo Pondé Weber (IME INSTITUTO MILITAR DE ENGENHARIA), Paulo Feliciano Soares Filho (IFRJ INSTITUTO FEDERAL DO RIO DE JANEIRO)
Abstract:
The present study studied the mechanical behavior under polystyrene (PS) fatigue before and after exposure ultraviolet radiation (UV-B). The evaluation of the physic chemical properties before and after UV-B radiation was carried out by molecular weight determination (GPC) and Fourier transform infrared spectroscopy (FTIR). The predominant failure mechanism in the test specimens, fractured under fatigue, was analyzed by scanning electron microscopy (SEM). The physico-chemical results showed changes in the properties of degraded materials, such as reduction of molecular mass (GPC) due to chain break age and the occurrence of oxidative degradation (FTIR). It was observed that the number of cycles supported by the material until failure was influenced by the radiation, so that the resistance observed in all the degraded materials was lower when compared to the material as received.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): LUCAS ARAUJO RABELO (PUC Minas)
Abstract:
The mineral can be found in the region of Abaeté - Minas Gerais in Brazil is a rock composed of quartz, potassium feldspar, albite, white mica and glauconite. It contains a high content of K_2 O which can reach up to 14% and therefore has been used as an agricultural fertilizer. The present study aims to use the same as a natural reinforcement for polymers, specifically polypropylene, in order to obtain products with higher mechanical properties and more advantageous price relative to other polymeric reinforcements such as glass fibers, wollastonite, lapinus fibers and talc. In order to analyze its potential as polymer reinforcement, tensile strength, hardness, Vickers micro hardness tests and density determination were performed. After insertion of the fiber to the polymer matrix of polypropylene (PP), the evaluation of its mechanical properties and analysis of the morphology of the composites by means of scanning electron microscopy (SEM) were carried out, in order to investigate its behavior in the polymer matrix. Aiming to improve the interaction of the polymer matrix with the mineral filler, a superficial treatment of the verdigris with an organosilane was carried out to transform it from the filler to the polymer reinforcement, thus maximizing its value and potential use
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Sheila barbosa paranhos (Universidade federal do pará), elisângela da silva ferreira (universidade federal do pará), Simone Patrícia aranha da paz (universidade federal do pará), sérgio neves monteiro (universidade federal do pará), alisson clay rios da silva (universidade federal do pará), verônica scarpini cândido (universidade federal do pará)
Abstract:
Considering the complexity in the treatment of skin lesion in hospitalized patients, we searched for natural or synthetic source materials with adequate mechanical and biological properties for protection in the skin and that contribute to the healing of the lesions. The polymeric materials are ideal for the construction of a biomaterial because their properties are suitable for application in dressings. Carboxymethylcellulose, a cellulose-derived polymer, is used as the basis for dressings and toppings as healing of skin lesions.Thus, this work aims to study the microstructural characteristics of the membrane of commercial carboxymethylcellulose.In this study, we used for analysis the extra fine CGC Duoderm, a biomaterial for carboxymethylcellulose based dressings.The material was submitted to X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy.The results evidenced in the XRD showed that the material was amorphous in nature and did not present peaks and bands.The FTIR allowed the detection of a larger set of spectral band variables within the range of approximately 3888-1547 assigning the material as organic.It can be inferred that this work made it possible to know the microstructure of the material, being essential for the development of dressings.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): iANA COSTA CARVALHO (iNSTITUTO MILITAR DE ENGENHARIA), Paulo Davi Borges Esteves (iNSTITUTO MILITAR DE ENGENHARIA), Ygor Pereira de Lima (iNSTITUTO MILITAR DE ENGENHARIA), Andrey Mariano dos Santos (iNSTITUTO MILITAR DE ENGENHARIA), TALITA GAMA DE SOUSA (INSTITUTO MILITAR DE ENGENHARIA), ANDERSAN DOS SANTOS PAULA (INSTITUTO MILITAR DE ENGENHARIA), MARCELO HENRIQUE PRADO DA SILVA (INSTITUTO MILITAR DE ENGENHARIA)
Abstract:
For many years, the traditional alloys were the basis for the development of new materials, with better properties then those until known. However, over the last decade, High Entropy Alloys (HEA) bring a new approach to the production of advanced materials, with excellent properties and bridged for various applications. In particular, Al-Co-Cr-Fe-Ni alloys are also notable for promoting a low-density HEA class and have been the focus of numerous studies in the current academic setting. The present article presents an optimization study of the AlCo2Cr2FeNi2 alloy metallographic preparation from 3 different polishing routes and their analyzes by scanning electron microscopy (SEM) and X-ray diffraction (XRD). In addition, the structural modifications of the alloy were evaluated as a function of a solubilization heat treatment (1050 ºC for 1 hour followed by cooling in water). The results of the analyzes demonstrated the promising electrolytic polishing route for the characterization of the LAE in question and the combined analysis of the results of XRD and SEM, added to the confrontation with the literature, allowed to identify the present phases and their microstructural modifications as a function of the heat treatment.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Roberta Lima de souza costa (Serviço nacional de aprendizagem nacional /senai/gva), Orlando rodrigues da costa sobrinho (SERVIÇO NACIOnAL DE APRENDIZAGEM NACIONAL/SENAI/GVA), verônica candido scarpini (Universidade federal do pará/UFPA), josé alberto silva de sá (universidade do estado do pará/uepa)
Abstract:
This paper analyzes the causes of accidents with passers-by in an urban land pipeline project in the city of Manaus-AM. This work resulted in disruption and / or damage to the city residents during their execution. The types of accidents that occurred and their causes during the process were analyzed and as a result, preventive actions were proposed, such as: a) intensification of communication for passers-by and residents with a description of the work; b) targeting traffic flow alternatives with allusive and reflective plates and alternative routes, with date and time of interdiction of public highway; c) indicate to the pedestrian safe passage near the work through indicative and educational signs; d) signaling along the open trench, from the stage of demarcation of the site to the closing of the trench and recomposition of the pavement; e) elaboration of an educational booklet for this type of work.
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:30 PM
Presenter(s): Giovanni Bruzzi Guarconi1 (UENF), JONAS ALEXANDRE (UENF), Markssuel Teixeira Marvila (UENF), AFONSO RANGEL GARCEZ DE AZEVEDO (UFF), Euzébio Bernabé Zanelato (UENF), Thais Pirovane Miguel (UENF), Sergio Neves Monteiro (IME)
Abstract:
The sector of extraction and processing of ornamental stones generates a considerable amount of waste in its various stages of processing. The objective of this research was to evaluate the feasibility of incorporating ornamental stone residue into adhesive mortar, used for laying ceramic tiles in buildings, with partial replacements of the small aggregate (sand) by the residue through the technological characterization of the mortar, such as the tests mechanics of traction adherence, open time. The mortars were made following the following percentages of sand substitution per residue: 0% (reference), 20% and 40%. Subsequently, the traces made were applied to the standard substrates where they were submitted to the mechanical tests of adhesion to traction and open time, following all the requirements required by the Brazilian technical standard, and also the traction adhesion tests, passed through the curing processes normal, submerged and greenhouse. The results showed that the resistance and workability has increased in relation to the reference trait, coupled with the increase of the substitution of the sand by the residue until the percentage of 40%. With this, it is concluded that with up to 40% of substitution of the sand by residue there is improvement in the properties of the adhesive mortar for application in the civil construction
Plenary
10/2/19, 3:40 PM - 10/2/19, 4:40 PM
Presenter(s): WESLEY DE OLIVEIRA SILVA (IME MILITAR DE ENGENHARIA), Carlos Luiz Ferreira (IME MILITAR DE ENGENHARIA)
Abstract:
Metallic thin films having a thicknesses that is less than the skin depth display a large absorption of microwave radiation. In this work, ultrafine films of titanium, transparent in the visible spectrum and absorbers of microwaves in the X-band (8-12 GHz), were produced by the electron deposition technique with several thicknesses (20, 25, 30, 40, 50 and 75 Å), at three deposition rates (1, 3 and 5 Å/s), and using titanium with different degrees of purity (TiGr2, TiGr4 and TiGr5). The films were characterized by X-ray diffraction, scanning electron microscopy, atomic force microscopy, optical transmittance, Hall Effect and microwave absorption. The results showed that ultrathin titanium films can be used as absorbers of electromagnetic radiation in the microwave range. The best results in terms of microwave absorption were obtained for films 30 Å and 40 Å thick with a deposition rate of 5 Å/s and using TiGr5. The fact that a fast deposition rate and a high impurity concentration enhanced microwave absorption is attributed to the creation of microwave-absorbing defects.
Closing
10/2/19, 3:45 PM - 10/2/19, 4:00 PM
Presenter(s): RHI MAGNESITA
Abstract:
Closing
10/2/19, 4:10 PM - 10/2/19, 4:25 PM
Presenter(s): AFS - SEDAN
Abstract:
Plenary
10/3/19, 8:10 AM - 10/3/19, 8:35 AM
Presenter(s): Raphael Dias de Medeiros (Arcelormittal tubarão), Gabriel Nazareth G. Alcoforado (arcelormittal tubarão)
Abstract:
The sintering process begins at the ignition stage of the surface layer of the mixture to be sintered. This ignition is performed through the heat supplied by a furnace, called "Ignition Furnace", and this burn must have sufficient heat potential to start the agglomeration process. As a result of the horizontal movement and the flow of air passing through the material, this surface firing front is transported until reaching the lower zones of the bed, thus producing the sinter. The higher the calorific value of the fuel used, the more efficient (lower fuel consumption and higher temperature) is the surface burning, thus raising the mechanical strength of the product during the process. Due to variations in fuel quality, keeping the ignition temperature controlled becomes a challenge, so, in this work, a study on the combustion of coke oven gas (COG) was carried out, evaluating not only its stoichiometric but also the most adequate control strategy, in order to maintain the working temperature and still optimize the yield and quality of the sinter produced. Mathematical knowledge, automation, control and industrial combustion were used in order to achieve the expected results
Plenary
10/3/19, 8:35 AM - 10/3/19, 9:00 AM
Presenter(s): larissa rodrigues de carvalho rocha (usiminas), Beatriz Fausta Gandra (USIMINAS), Gerson Evaristo de Paula Júnior (USIMINAS), Lucas Gonçalves Generoso (USIMINAS)
Abstract:
Reduction efficiency of iron ore in the blast furnace is controlled by the structure and permeability of the burden layers. The granular zone of the blast furnace is the region where the burden remains its stratified structure, due to charging, in the form of solid grains. In this region, the permeability conditions determine the gas distribution profile and, consequently, the thermal and chemical efficiency of the reactor. At Usiminas, was developed a permeability test that allows the evaluation of the pressure drop in beds formed by the raw materials used in the blast furnace, seeking the most favorable conditions for gas flow. Then it was possible to evaluate charges composed exclusively of sinter, pellet or granular ore, or binary combinations between them. The sinter presented the highest pressure drop, followed by pellet and granular ore. Despite this, the sinter was the material that allowed greater increase of gas flow. The tests indicated that 5% of material with a grain size smaller than 5 mm is the limit for the concentration of sinter fines, condition which there was an increase of approximately 50% in the resistance to the gas flow in velocities corresponding to those of blast furnace. The best permeability bed was composed of 95% sinter and 5% pellet, followed by 100% sinter, with no significant difference between these conditions. In general, the combination of sinter and pellet resulted better bed permeability.
Plenary
10/3/19, 8:35 AM - 10/3/19, 9:00 AM
Presenter(s): SABRINA SADALLA COLLESE (VILLARES METALS)
Abstract:
The efficiency in logistics flows became a differential and a necessity for companies nowadays; efficient logistics brings improvements in the level of care and cost reduction and responsiveness to the process. One of the major challenges for Brazilian metallurgy industry is to predict the domestic demand for product of their production in line with the seasonality and the planning to care for the movement of these materials among the productive areas in order to ensure the company's internal policies, safety rules, in addition to the need to optimize the process, earning time and reducing costs. The aim of this work is to compare the previous model without technology and the implemented model with technology about the internal material movements of the plant, promoting the challenges of implementing the technologies, as well as the process restrictions and the benefits achieved.
Plenary
10/3/19, 8:35 AM - 10/3/19, 9:00 AM
Presenter(s): andrea pezza (primetals technologies germany gmbh), willi anton buehler (primetals technologies germany gmbh), edilson maranhao (primetals technologies germany gmbh)
Abstract:
O processo de vácuo é a solução típica aplicada quando é hora de atualizar o nível de qualidade do aço de uma aciaria existente. A instalação do novo Tanque de Desgaseificação à Vácuo (VD) de 135t no Canadá e do novo RH de 150t na planta integrada no México para a produção de tubos de alta qualidade na América do Norte é um exemplo típico disso. A nova instalação inclui o mais recente conceito de design para este tipo de equipamento: operações totalmente automatizadas e menor impacto ambiental são os principais aspectos do projeto. A solução de bomba mecânica a seco continua sendo a melhor abordagem de investimento e custo operacional para a tecnologia de vácuo. Os principais aspectos do design da planta são descritos neste documento. O desgaseificador a vácuo VD é responsável pela melhoria das performances metalúrgicas, especialmente em termos de nitrogênio, remoção de hidrogênio e nível de pureza do aço. O processo a jusante e os resultados estão estritamente ligados aos desempenhos do desgaseificador a vácuo. O monitoramento de processos através da linha completa é uma prática padrão para obter uma melhoria efetiva da qualidade do produto. Os desempenhos metalúrgicos do desgaseificador a vácuo VD são analisados e comentados neste trabalho.
Plenary
10/3/19, 8:35 AM - 10/3/19, 9:00 AM
Presenter(s): Joilson moreira ferreira da Silva (APERAM SOUTH AMERICA), Mauricio Ferreira Coelho (APERAM), Carlos Alberto Mourão (APERAM), Edilson Simões Cavalieri (APERAM), Robson Martins Ferreira (APERAM), Letícia Madureira Moreira (APERAM), Hélio Braz Loss (APERAM)
Abstract:
The AOD-L converter is exclusively used for stainless steel’s production at Aperam South America. Between January and July 2018, FeSi consumption was above the budget, causing a loss of gain for the Steelplant. AISI 304 stainless steel represents 50% of the production in duplex route (without VOD), therefore, this project had the objective of reducing the FeSi consumption in AOD-L process for 304 grades. This reduction was possible through the use of the Lean Six Sigma methodology in which the root cause was identified and the actions implemented, what allowed for greater operational stability, in addition to increasing the competitiveness of Aperam South America compared to other stainless steel’s players
Plenary
10/3/19, 8:35 AM - 10/3/19, 9:00 AM
Presenter(s): luiz filipe cardoso de oliveira (universidade federal de ouro preto graduação), Alex Milton Albergaria Campos (Graduado em Engenharia Metalúrgica-UFOP. Aluno de doutorado em Engenharia de Materiais-REDEMAT/UFOP, Ouro Preto, MG, Brasil.), paulo santos assis (Professor Doutor Titular na REDEMAT e UFOP - Escola de Minas. Pesquisador CNPq. Conselheiro da ABM e EcoEnviroX, Ouro Preto, MG, Brasil)
Abstract:
In coke-based steel mills, coal has a key role in the production of metallurgical coke, which will be used in blast furnaces for the production of pig iron. Coke is produced from blends of mineral coals with different properties formulated to meet the operational requirements of the coking process and to ensure the quality of the pig iron that will be produced in the blast furnaces. In addition, this mix should have the lowest possible cost since most of the metallurgical coal used in Brazil is imported, thus representing a large share of the cost of steel. The big challenge in the industry is to obtain blends of coals that meet the coking plant and produce coke with high quality and low cost. To do so, it is necessary to optimize several processes, from the purchase and transportation of the coal to its storage, formation of the blends and supply of the coking plant. The aim of this work is to optimize and plan the coal mixture for the coking plant with the use of plastic waste of lower added value in the mix that allows the production of coke with lower cost and with the quality required in the process of steel fabrication.
Plenary
10/3/19, 8:35 AM - 10/3/19, 9:00 AM
Presenter(s): Thiago durante (Instituto federal do espirito santo (IFES)), José roberto de oliveira (INSTITUTO FEDERAL DO ESPIRITO SANTO (IFES)), anna paula littig berger (INSTITUTO FEDERAL DO ESPIRITO SANTO (IFES))
Abstract:
This paper carried out a comparative study, in which, seven laboratory produced slags and fourteen industrial slags were analyzed based on its compositions and Factsage 7.0 results, in order to measure the most advantageous foaming conditions both in relation to the properties and composition. From the laboratory slags, the best foaming condition were observed with a composition of 8% FeO 22% MgO, and properties of 12% of precipitated phases, a ternary basicity of 1.2 to 1.4. viscosity at about 0.5 Poise and foaming index closer to 12,31s. The industrial slags did not showed values within these parameters, however, with the analysis, it was possible to identify that there are vast compositions combinations that will provide an optimized process, and all related to the following improvements: reducing the FeO levels, aiming at superior race yields and higher viscosity of foaming slags; Increase of MgO contents pursuing saturation and to provide precipitated second phases; Increase the yield of the carbon reactions, reducing its additions.
Plenary
10/3/19, 8:35 AM - 10/3/19, 9:00 AM
Presenter(s): Eduardo de Oliveira Cabral (eirich industrial ltda), elen mancini santi pauletto (EIRICH INDUSTRIAL LTDA), vinicius calheiros (EIRICH INDUSTRIAL LTDA)
Abstract:
At this paper, Eirich will present its new tool for sinter analysis integrated to the sintering control system. For stabilization and optimal, continuous control of the sintering process, QualiMaster, a device was developed which guarantees fully automatic representative sampling and material analysis and thus a high and stable sintering quality. Mining tailings often has a considerable proportion of valuable substances. In addition to this work, we will also present our mixing technology that allows the economic recovery of these mining tailings.
Plenary
10/3/19, 8:35 AM - 10/3/19, 9:00 AM
Presenter(s): Edwillson Gonçalves de (UFPA), Roberto Tetsuo Fujiyama (UFPA), Alisson Clay Rios da Silva (UFPA), Veronica Scarpini Candido (UFPA), Sérgio Neves Monteiro (IME-RJ)
Abstract:
The use of natural fibers as reinforcement for polymeric composites replacing synthetic fibers has been growing in the last decades for different industrial sectors because they have unique properties. Thus, the production of composite materials reinforced with vegetable fibers was evaluated in a polymer matrix constituted of terephthalic unsaturated polyester resin. The manufacturing process was hand lay-up, using silicon mold, in the presence of the carnauba fiber (Copernicia Prunifera). The dimensions and frequency distributions of the natural fibers were determined. The mechanical characterization of the composites was studied through tensile tests. The fibers used in the experiment were in the in natura condition and chemically treated. For the verification of the strength and stiffness of the samples, AROTEC universal test machines were used. The tensile test of specimens reinforced with discontinuous fibers and randomly oriented fibers was used, using lengths of 5, 10, 15 mm, for mass fractions varying according to the volumetric capacity of the mold. In addition, a fractographic analysis was performed in the scanning electron microscope (SEM), to analyze in detail the fracture surfaces of the samples tested, in order to understand the fault mechanisms of each material. Very poor interfacial adhesion was observed and did not exhibit an appropriate mass fraction to maximize the mechanical properties thereof. The results were also compared with data found in the literature, correlating with other works with vegetal and synthetic fibers.
Plenary
10/3/19, 8:35 AM - 10/3/19, 9:00 AM
Presenter(s): ANDRE KRASZCZUK (Escola Politécnica da USP)
Abstract:
Due to rigid environmental laws and the fuel efficiency goals stipulated by the Federal Government, automakers seek new processing routes to reduce the mass of vehicles without compromising their mechanical strength. The most widely used is hot stamping of boron steels. However, after this process the steel does not have sufficient ductility to absorb energy during impact. Hence, the quenching and partitioning cycle (Q&P) has been recently proposed to recover the ductility through carbon partitioning from martensite to austenite (γ), which favors the transformation induced plasticity effect. This work discusses the effects of percentage of applied deformation and the partitioning temperatures on the carbon enrichment of γ, using synchrotron radiation in-situ, in a Gleeble 3S50TM thermomechanical simulator. Deformations in 10%, 20% and 30% at high temperatures, as well as partitioning temperatures of 260 °C, 300 °C and 340 °C were applied. Electronic microscopy, X-ray diffraction, microhardness and sub-size tensile test techniques were employed to characterize the samples. The results suggest that increasing the applied deformation increases the time required for maximum carbon partitioning. Similarly, as the partitioning temperature increases, the time of maximum partitioning is strongly increased. Therefore, it is concluded that 10% of deformation and 260ºC of partition temperature are the most appropriated parameters to minimize partitioning times.
Plenary
10/3/19, 8:35 AM - 10/3/19, 9:00 AM
Presenter(s): camila freitas de araújo (UFOP/REDEMAT), ADRIANO corrêa batista (ifmg), bernardo antônio perez da gama (uff), paulo santos assis (ufop)
Abstract:
The golden mussel Limnoperna fortunei is an invasive specie that has been causing many problems in aquatic environment due its aggregation on structures of non polar materials. The specie attaches on surfaces by means of protein filaments causing serious social, economic and environmental damages. The challenge presented consists of biological fouling combat through treating underwater surfaces with freshwater natural products, in particular those from red algae. With the worldwide ban of TBT-based antifouling paints since 2008, alternative, environmentally safe treatments gain more appeal, considering the risk associated with the alternative products currently in use. A set of conditions is described for species producing secondary metabolites with important antifouling activity. Therefore, the objective of this work is to reinforce a broad line of research dedicated to consolidating information on the potential of marine organisms as producers of secondary metabolites (natural products) with antifouling activity, in the light of the scientific production to be analyzed in the space destined to results presentation.
Plenary
10/3/19, 8:35 AM - 10/3/19, 9:00 AM
Presenter(s): Ana gabriella conceição dos santos (universidade federal fluminense), Harison da Silva Ventura (universidade federal fluminense), Mariana Sizenando Lyrio (universidade federal fluminense), Fernanda Nascimento Moreira (universidade federal fluminense), Gabriella Maria Silveira de Sá (universidade federal fluminense), Weslley Luiz da Silva Assis (universidade federal fluminense)
Abstract:
The appearance of intermetallic phases in steels is a matter of great interest due to the harmful character that they can confer to the mechanical properties of the material. In the present work, the effect of the appearance of the sigma phase for a duplex stainless steel through numerical-computational modeling was studied. The duplex microstructure was obtained by computational simulation, to be used as a matrix for the nucleation and growth of the sigma phase, also by simulation. The Causal Cone method was used for the development of the microstructure and the results were compared with the formal kinetic methodology of JMAK for model validation purposes. The results of the simulation allow obtaining, by the Mixing Rule, predictions about the mechanical properties of the material, in this case, the ultimate strength, which was compared with the data found in the literature. It was possible to verify the increase of the hardness for greater volumetric fractions of sigma, which results in the reduction of the ductility of the steel.
Plenary
10/3/19, 8:35 AM - 10/3/19, 9:00 AM
Presenter(s): atan de assumção cardoso (UFF), Adauto martins de assis (uff)
Abstract:
Due to its high production demand and quality standard, the automotive industry has used robots in various activities such as assembly, welding, painting and inspection. In order to bring this reality to Mechanical Engineering students, a didactic robotic arm was developed, presenting a configuration similar to an industrial model, to be used as a tool to support the teaching of robotics and other related disciplines. For this, the associated electronic board Arduino and Matlab software were used. In order to bring this reality to Mechanical Engineering students, a didactic robotic arm was developed, presenting a configuration similar to an industrial model, to be used as a tool to support the teaching of robotics and other related disciplines. For this, the associated electronic board Arduino and Matlab software were used. Initially the equations of direct and inverse kinematics were obtained. The results showed that the theoretical position obtained showed an expected behavior according to the adopted methodology and the experimental result showed a small variation of position. For the inverse kinematics, the resolution time of the set of equations was compared to the resolution of the problem by a numerical method. Based on the experimental results, some suggestions for improvement were made for the didactic robotic arm and considerations related to the accuracy of an industrial robot.
Business Rounds
10/3/19, 8:35 AM - 10/3/19, 10:15 AM
Presenter(s): Coordinator: Wellington Ribeiro Moreira – Automation engineering and process manager – Casa da Pedra Mining – CSN
Abstract:
Plenary
10/3/19, 8:35 AM - 10/3/19, 11:09 AM
Presenter(s): CAIO HENRIQUE VIDIGAL (ARCELORMITTAL BRASIL SA), Marcelo Marchesi Martinelli (Arcelormittal Brasil SA)
Abstract:
Gasholders are important equipment to improve the energetic efficiency of integrated steel plants, being these kinds of equipment responsible for the process gases pipelines pressure control by the variation of their volumes. When it is not possible to operate the gasholders it is necessary to burn the gases at flare stacks to guarantee the pressure control. In 2008, December, the ArcelorMittal Tubarão coke oven gas gasholder was overhauled and the seal was changed. This gasholder is a M.A.N type (oil sealed). By using the Lean methodology, changing mindsets and moving some paradigms was possible to execute the overhaul in an efficient way in just 32 days, 28 days less than the last similar event and 13 days less the target that was set for the overhaul, increasing the coke oven gas recovery, maximizing the electric generation and minimizing the exposition to environment risks that were associated with this event. The ideas in this report are valuable to develop the critique and systemic thinking not just about the gasholders but in the whole context of consolidated standard activities.
HR Rounds
10/3/19, 8:35 AM - 10/3/19, 12:45 PM
Presenter(s): - OPTIMUM - DIGITAL REVOLUTION - GT2 - PHYGITTAL - GREENFUEL
Abstract:
Plenary
10/3/19, 9:00 AM - 10/3/19, 9:25 AM
Presenter(s): Moacir Andretti SABINO MOTA (UFOP UNIV FED. DE OURO PRETO -), LEONARD CARVALHO (UNIVERSIDADE FEDERAL DE OURO PRETO), paulo santos assis (Universidade Federal de Ouro Preto)
Abstract:
Pig iron is the main raw material for the production of steel and therefore its quality must be such that it fits the refining process as well as possible. Among its specifications the silicon content stands out, either by the consumption of inputs in the refining process or by its energy importance for the metallic bath. In this context the objective of this work is the prediction of silicon composition in the pig iron produced by blast furnace in Minas Gerais. For this, three artificial neural networks and a committee machine were used. For this we used the Python language and the Keras library. The neural networks used were of the 3-layer perceptron type and the training was used for cross-validation with data separation in 10 groups. As training data we considered a set of data resulting from the historical data of AF1 operation. The database had 527 race records, with 19 input variables from January 2016 to June 2017. As a result the committee machine presented: RMSE of 0,0880 during training and 0,0877 in the test phase.
Plenary
10/3/19, 9:00 AM - 10/3/19, 9:25 AM
Presenter(s): marcus valério magnago (arcelormittal tubarão), alexandre medeiros (arcelormittal tubarão), evaldo nogueira (arcelormittal tubarão), Bruno Aquino rocha (arcelormittaltubarão)
Abstract:
This article has the purpose of demonstrating the evolutionary scenario of ArcelorMittal Tubarão steel products railroad expedition, focused on operational efficiency and customer service. In this document, we will present the structure of yards and equipment, the previous status of the expedition share in the terrestrial modalities and the motivators of the change process. Next, we will present the improvements and innovations implanted in our internal and external processes, of the logistics chain of customer service. At the end, we will show the evolution of the participation of the rail modal in the shipment share, as well as the gains captured through the increase of this participation.
Plenary
10/3/19, 9:00 AM - 10/3/19, 9:25 AM
Presenter(s): rafael césar de souza (ternium brasil), denilson de souza braga (ternium brasil), bruno de alcântara monteiro (ternium brasil), rodrigo marcelino guilherme (ternium brasil)
Abstract:
The objective of this project is to present the innovative implantation of tests of the intrinsic protections in the gasholders of Blast Furnace Gas (BFG) and Basic Oxygen Furnace Gas (BOFG) called "Testes Espoleta", in which all the existing protections , the gasholders being in normal operation and connected to the Production Process. These tests were designed based on a benchmark with companies in the steel sector due to the accident occurred with a gasholder in 2018 in Brazil and especially during the project developed by a multidisciplinary working group in conjunction with the specialized consultancy of Process Risk Analysis. As a result of this project, was defined a recommendation of tests in the protection system after classification of risk degree 1 (Severity / Probability) of the danger of explosion / fire in case of failure in the protections of the Gasholders and the existing redundancies.
Plenary
10/3/19, 9:00 AM - 10/3/19, 9:25 AM
Presenter(s): vinicius cardoso da rocha (universidade federal do rio grande do sul - laboratório de siderurgia (lasid))
Abstract:
The capacity of steelmaking slags (CaO-SiO2-Al2O3-MgO) on inclusion removal from liquid steel was investigated through experimental conditions. Laboratory experiments with slag and steel samples (with inclusion population known) were performed using a vertical electric resistance furnace at 1600 ºC. After the melting experiments, slag and steel samples were separated and analyzed regarding their chemical composition and inclusion population evolution. The capacity of slags on inclusion removal was evaluated based on the thermodynamics (solid and liquid phases proportion, phase composition and effective viscosity of slags) calculated using the FactSageTM 7.2. Results indicated that changes in the composition of slags (regarding CaO/SiO2 e Al2O3) presented effects on the steel cleanliness. The total inclusion density decreased in all steel samples and the removal of inclusions by slags shows a tendency to improve as their viscosity decreases (< 0.23 Pa.s).
Plenary
10/3/19, 9:00 AM - 10/3/19, 9:25 AM
Presenter(s): CARLOS ANDRE RUY CARNEIRO (CSP), Marcos Daniel Gouveia (CSP – Companhia Siderúrgica do Pecém), Miguel Arcanjo Almeida (CSP – Companhia Siderúrgica do Pecém), Raquel Verona (CSP – Companhia Siderúrgica do Pecém), Carlos Guimaraes (CSP – Companhia Siderúrgica do Pecém), Pablo Leão (Departamento de Engenharia Metalúrgica, Universidade Federal do Ceará.), Jefferson Klug (Departamento de Engenharia Metalúrgica, Universidade Federal do Ceará.)
Abstract:
The current scenario of production loss due sequence breaks caused by clogging in aluminum-killed steels with calcium treatment was critical for the Steelmaking plant. It was performed technical adjustments in the primary and secondary refining processes through the implementation of actions to reduce the aluminum consumption, ladle slag chemical composition adjustment and adjustment in the calcium addition procedure. The results were evaluated by slag ternary diagrams, inclusions counting analysis, total oxygen analysis, chemical distribution analysis using scanning electron microscopy (SEM) and Energy Dispersive spectrometry, castability window and dissolved aluminum. From this evaluation, it was achieved a consistent reduction in the clogging number and an increase in the steel cleanliness and quality
Plenary
10/3/19, 9:00 AM - 10/3/19, 9:25 AM
Presenter(s): HENRIQUISON MAGELA BOTTREL REIS (USIMINAS), Bruno Santos Malaquias (USIMINAS), Diego Canez Fernandes (USIMINAS), Carlos Eduardo Pessoa Gomes (USIMINAS)
Abstract:
The deposit of carbon is inherent to the by-product coking process. The tendency of the carbon is to accumulate more in the oven free zone regions (roof, charging holes and also in the vertical walls) as well as in the gas ascension pipe. However, in excess deposits may cause decrease in productivity, environmental impacts and shortening of coke oven life. In this context, it was evaluated the mechanisms formation of carbon deposits , as well as the factors related to the cokemaking and coal blend. Statistical analyses were carried out to identify the main variables influencing the formation of the carbon deposits. In addition, samples of deposits collected near the charging holes and ascension pipes, as well as tar samples for determination of quinoline insoluble material (QIM) were evaluated. It was found that the material are formed by particles of pyrolytic carbon (due to gas cracking) and mainly by entrained carried particles of coal, semicoque and coke, corresponding to 60%, 54% and 72%, respectively for the regions of the charging hole, the base of the ascension pipe and upper part of the ascension pipe. Countermeasures to minimize carbon deposit formation were identified and defined, such as: free zone temperature reduction; increase of the bulk density, control of fines (< 0.105 mm), besides reducing the coal blend volatile matter and application of some decarbonization techniques.
Plenary
10/3/19, 9:00 AM - 10/3/19, 9:25 AM
Presenter(s): neiclésio nunes ibiapina (siderúrgica norte brasil - sinobras), gerson ceslau rusky (SIDERÚRGICA NORTE BRASIL - SINOBRAS), geraldo sales mendes ferreira (GRAFTECH BRASIL), Marcus Esleyr Cardoso de Moraes (GrafTech Brasil)
Abstract:
The electric arc furnace (EAF) is an equipment used to make steel which consists on melting the scrap using electrical power, through the emission of electric arc among the graphite electrodes and metallic charge, and others chemical reactions. Competitivity among steel producers had increased over the past years, forcing cost reductions and since graphite electrodes contribute to cost, its reduction impacts on variable cost of the meltshop. This paper presents the results obtained in the reduction of the specific consumption of graphite electrode of EAF at SINOBRAS. A resolution methodology was used along with an EAF data monitoring system in order to optimize the power program.
Plenary
10/3/19, 9:00 AM - 10/3/19, 9:25 AM
Presenter(s): marcos cordeiro fonseca (usiminas)
Abstract:
Sinter maximization in the blast furnaces charge has proven to be the most economically viable way to produce pig iron at Usiminas. This fact has led the company to develop projects aimed at increasing the production of sintering. In this context, the present work shows the recent experience of Sintering Machines 1 and 2 drum mixer exchanging contributing to the increase of operational productivity due to the optimization of the original design. For 13 days was the replacement of the original drum installed in 1974 by a new drum with improvements in the design of the internal and the sprinkling water system. The improvements contributed to the effective formation of micro-pellets and, as a result, increased productivity of Sinter Machines. Several aspects of the project are presented: engineering, planning, safety, manufacturing, technical quality, schedule and a comparison between the parameters of the equipment operation before and after the implantation
Plenary
10/3/19, 9:00 AM - 10/3/19, 9:25 AM
Presenter(s): Adriano Luis Roma (UNITPAC), Jonathas Gabryel Borba Carvalho (UNITPAC), Leticia Cunha Oliveira (UNITPAC), Thomas dos Santos silva (UNITPAC), Halison Ribeiro Aquino (UNITPAC)
Abstract:
The self-supporting concrete (CAA), must reach three properties to be defined, fluidity, resistance to segregation and passing ability. In addition to being a major technological advance, it brings several advantages, for example the resistance to segregation of materials, obtaining structural parts with high mechanical properties. In Brazil its use is timid, for example its first standardization is NBR 15823 (ABNT, 2010), this motivated the research, being an important technological advance; the objective of the study was to study the CAA through tests in the fresh state, spreading and passing ability, in the hardened state, axial compression and diametral compression traction, which proved their efficiency, reaching after 28 days the average of 35.81 MPa in the test of axial compression.
Plenary
10/3/19, 9:00 AM - 10/3/19, 9:25 AM
Presenter(s): Pedro guilherme do nascimento pereira (Universidade federal do ceará)
Abstract:
Steel is a material present in various sectors of the current economy. Its use ranges from the industrial sector, such as the automotive, to the food sector, such as packaging. There are different metalworking processes for shaping and matching the alloy’s properties to the application needs, such as drawing and cold rolling. Although the two methods have the same purpose of increasing resistance, there are differences between them that influence the final product. This work uses wire rod of 5.5mm diameter of low carbon steel comparing drawing and cold rolling in terms of mechanical tests and microstructure for the production of CA-60 bars of diameter 4,2mm and evolution of the crystallographic texture between the passes of the processes. At the end of the tests, the rolled products showed higher results in the tensile tests, the microstructure demonstrated the stretching of the grains on the surface and the two methods presented texture in the same final directions with different intensities.
Plenary
10/3/19, 9:00 AM - 10/3/19, 9:25 AM
Presenter(s): CArina bertino (instituto argentino de siderurgia), Maria Berenice sandobal (tenaris argentina), Elisabet williams (Acindar grupo arcelormittal), Beatriz dogliani (ternium argentina)
Abstract:
The environmental management of steel mill slag should be understood as a management philosophy, observing technical, economic and environmental criteria associated with their generation, storage and final destination The slag can be considered as a synthetic mineral resource and become a very useful co-product in different areas. The Argentinean steel industry prioritizes the efficient environmental management of its waste, thus contributing to its own survival taking into account the sustainable development. In the world, the slag produced by the steel industry has been used as steel aggregate for road bases, railway ballast and filling material among others. Any factor that influences the economy of the country affects all branches of society, mainly public agencies, whose financial resources are increasingly scarce to deal with all public works. It is necessary to join efforts of private and public initiative in the adoption of alternative materials that replace the use of finite natural resources. This presentation aims to show the work done by private companies together with public bodies and universities to obtain a regulatory document for the management of slag as steel aggregates for three different uses, namely: road use, railway use and general use.
Plenary
10/3/19, 9:00 AM - 10/3/19, 9:25 AM
Presenter(s): ANDRÉ LUIZ MORAES ALVES (UNIVERSIDADE FEDERAL FLUMINENSE), Felipe da Silva Siqueira (UNIVERSIDADE FEDERAL FLUMINENSE), Guilherme Dias da Fonseca (UNIVERSIDADE FEDERAL FLUMINENSE), Gláucio Soares da Fonseca (UNIVERSIDADE FEDERAL FLUMINENSE), Weslley Luiz da Silva Assis (UNIVERSIDADE FEDERAL FLUMINENSE), Paulo Rangel Rios (UNIVERSIDADE FEDERAL FLUMINENSE)
Abstract:
The continuous advent of materials may increase the occurrence of transformations involving two or more product phases. When this transformation of a matrix phase into two or more product phases takes place, it can be simultaneous, when the product phases start at the same time, or sequential, when the product phases start at different times. It is already known that from the classical nucleation theory the heterogeneous nucleation has advantages over homogeneous nucleation. Several sites may become preferred because they favor heterogeneous nucleation. Two fairly preferred sites are the interface of precipitates and the grain boundaries. In this context, an analytical and computational model, via causal cone, were used to investigate simultaneous and sequential transformations that have preferential sites for nucleation. One considered that a polycrystalline matrix phase having spherical precipitates transforms into two product phases, 1 and 2. The product phase 1 nucleated at the matrix/particles interface and the product phase 2 nucleated at the grain boundaries. The simulation results had an excellent agreement with the analytical modeling. It was observed that each preferred site had a very different effect on the simulated microstructures.
Plenary
10/3/19, 9:00 AM - 10/3/19, 9:25 AM
Presenter(s): alexandre caldellas barbosa (arcelormittal tubarao)
Abstract:
There are several reasons to use virtual reality (VR) in training, we can highlight the reduction of costs, reduction of risks to the environment and involved and also the possibility to reproduce or simulate situations impossible, very complex or even in another place or even in another time space. This paper will present an exploratory study on the use of VR, a market research was conducted and presented the case of how ArcelorMittal Tubarão has been working with this technology during its corporate training in the year 2019. The acceptance of technology by employees in training was above 98%, and it was also demonstrated that in addition to increasing attractiveness and retention of knowledge, the gains were also linked to risk reduction, reduction of training time, the experimentation of critical situations and reduction of costs, giving more efficiency and effectiveness to the training.
Forum
10/3/19, 9:00 AM - 10/3/19, 9:50 AM
Presenter(s): Jorge Guimarães Caldeira Filho – Managing partner and consultant for coal and coke – Coalbiz;
Abstract:
Plenary
10/3/19, 9:25 AM - 10/3/19, 9:50 AM
Presenter(s): RICARDO RODRIGUES GRIZOTTI (Arcelormittal)
Abstract:
The project aims to develop the standardization and implementation of an MRO Inventory Management and Management Model (Maintenance, Repair and Operation) as well as a Replacement Model based on quantitative policies and models, supported by systemic tooling developed in the ERP SAP of the company that incorporates Planning and Management Practices, for better determination of Stocks and Level of Services of MRO Nature Materials aiming at optimizing and balancing stock levels with increased level of service; stockout reduction; optimize the size of the purchase lots for each SKU; optimization of replenishment policies for each SKU class and to develop indicators and performance for monitoring and controlling the planning and management of MRO stocks. The development, construction, and implementation of the project was guided and accomplished through the use of the Lean Six Sigma Methodology and its tools from DMAIC - ("Define", "Measure", "Analyze", "Improve" and "Control"). a planned management strategy, focusing on quality and financial results, with the objective of promoting significant changes in the company, always seeking improvements in processes, products and services offered to customers.
Plenary
10/3/19, 9:25 AM - 10/3/19, 9:50 AM
Presenter(s): Mauro domingues trindade (White martins gases industriais ltda), Rodrigo martins barbosa (white martins gases industriais ltda)
Abstract:
Reduction of energy consumption in air compressors by the implementation of individualized load control. 3.5% reduction as of Jun / 18
Plenary
10/3/19, 9:25 AM - 10/3/19, 9:50 AM
Presenter(s): PEDRO CUNHA ALVES (universidade Federal do rio grande do sul)
Abstract:
Steel cleanliness and reoxidation of a modified SAE 1055 steel were evaluated during its production on an electric steel mill. Slag A in CaO-SiO2-MgO-Al2O3-CaF2 (CSMA-F) oxide system and slags B and C in CaO-SiO2-MgO-Al2O3 (CSMA) oxide system were analyzed. Two steel samples were collected in industrial environment: ladle furnace and rolled bar. An ASPEX Explorer was used to obtain information about inclusions, organizing them by chemical composition, size, density and type. FactSage v7.2 calculated inclusions formed during steel solidification, liquid and solid fraction of slags and liquid viscosity. After secondary refining, most common type of inclusion was calcium aluminate. At rolled bar, spinel was the more frequent type of inclusion, indicating a possible reoxidation product. Their formation could be caused by interactions with tundish and mold materials. Reduction of temperature also favors formation of spinel as shown by FactSage. Spinel inclusions were analyzed by Population Density Function (PDF) method, which identified that heats A1, A2, C1 and C2 had spinel inclusions formed by reoxidation. Usage of slag in CSMA system is indicated since reoxidation was diminished in heats B1 and B2. Nevertheless, it would be necessary a deep analysis on tundish and mold materials to improve steel cleanliness of SAE 1055 steel.
Plenary
10/3/19, 9:25 AM - 10/3/19, 9:50 AM
Presenter(s): Haysler Apolinário Amoroso Lima (Saint-Gobain ), Vladnilson Peter de Souza Ramos (Saint-Gobain), douglas fernando galesi (saint-gobain)
Abstract:
The search for new higher added value products has encouraged the production via degassing systems. This equipment, RH Degasser in particular, provides high rates of decarburization and dehydrogenation, adding value to the steel produced. The engineering behind this equipment is very important for optimum operational performance, ensuring productivity and safety. Understanding the wear mechanisms of the equipment helps us the decision-making, reinforcing regions of big wear. Accurate measurement of the wear profile is vital for the success of the project. In this work, a spatial model was developed to estimate the wear of RH using Geostatistics tools. Through collection of some points, a map of the wear was created, which allows us to estimate values for other regions. The focus of this study was also to analyze the influence of nozzle clogging on the rate of steel circulation and on the erosion of the refractory wall.
Plenary
10/3/19, 9:25 AM - 10/3/19, 9:50 AM
Presenter(s): RODRIGO ALVES RAMOS (Gerdau/ufc)
Abstract:
Knowing that the EAF process requires a large amount of electricity, optimizations of mass and energy balances are done with high frequency. In general, these calculations are not simple and in some companies there are software developed specifically for this purpose, a consequence of a technological evolution that has allowed to capture and store many variables in databases. Aiming to obtain the greatest number of possible responses from the data, it was applied a statistical approach using the multiple linear regression (MLR) and partial least squares (PLS) methods correlating scrap mix, process and electrical parameters of the EAF with the required amount of electrical energy to melt the solid load - one of the largest installments in the production cost of electric steelmaking. The models were evaluated with the actual data of different periods and, in addition, with data obtained by the company's official software for mass and energy balance, showing a good fit with mean errors of less than 5% for all regressions. The statistical model demonstrated a good accuracy for the industrial practice of energy optimization and the advantage of obtaining results from linear equations.
Plenary
10/3/19, 9:25 AM - 10/3/19, 9:50 AM
Presenter(s): Mariana Carvalho araújo (GERDau)
Abstract:
The present study aims at the reduction of the dolomitic limestone by the addition of lime added with high MgO (magnesium oxide) content in the sintering process. To verify the feasibility of the use of additive lime as an alternative surce of magnesium oxide, sintering tests were carried out at pot grate with different percentages of additive lime addition and with proportional reduction of the calcite lime dosage, evaluating the effects on the sintering process. The results showed that the additive lime is a good source of MgO for consumption in the sintering processo of iron ore.
Plenary
10/3/19, 9:25 AM - 10/3/19, 9:50 AM
Presenter(s): NOAN TONINI SIMONASSI (INSTITUTO MILITAR DE ENGENHARIA), sERGIO nEVES mONTEIRO (INSTITUTO MILITAR DE ENGENHARIA)
Abstract:
Abundant around the world, basically most kind of plants produces fibrous structures. The extraction of these fibers usually occurs by simple and low cost processes if they are even needed. Recently, the growing concern about the environmental impact caused by modern society has led the scientific community to seek new technologies and sources of sustainable resources. In this perspective, natural lignocellulosic fibers are studied for use as engineering materials and suggested as possible substitutes in sectors where synthetic fibers are traditionally used. Thus, the present work has the objective of creating composites of epoxy matrix of high mechanical performance reinforced with curaua natural fibers. The curauá fiber has reported resistance in the literature up to 3000 MPa. However, the difficulty of creating a good interface between matrix and reinforcement makes the higher results of polymer matrix composites present a loss of mechanical performance when compared with the expected theoretical value and have a high statistic dispersion. In this work, tensile strength results demonstrate that the presetting of the processing parameters can raise the mechanical strength of the material up to 335 MPa with a dispersion of about 6%.
Plenary
10/3/19, 9:25 AM - 10/3/19, 9:50 AM
Presenter(s): SUZANE DE SANT'ANA OLIVEIRA (IME - Instituto MILITAR DE ENGENHARIA), Karollyne Gomes de Castro Monsores (IME - Instituto militar de engenharia), Anderson Oliveira da Silva (IME - INSTITUTO MILITAR DE ENGENHARIA), Géssica da Silva Nicolau (IME - INSTITUTO MILITAR DE ENGENHARIA), Ricardo Pondé Weber (IME - INSTITUTO MILITAR DE ENGENHARIA)
Abstract:
Ballistic armors must meet the following criteria: protection, firepower, mobility and transportability. To achieve the necessary properties to meet these criteria, metallic materials can be subjected to tempering and tempering, which allow excellent hardness without loss of toughness. To conciliate these properties in armor is of fundamental importance, since the hardness is responsible for the break of the projectile tip and the toughness for the absorption of the shock and the energy of impact. As the energy absorption is a fundamental property for the shielding, the objective of this work was to evaluate, by means of the Charpy impact test, the amount of energy absorbed in an HHA steel per cm2 at room temperature (~25 ° C), 0 ° C, -10 ° C, -40 ° C and -70 °, in addition to performing an analysis of the fracture surface of the specimens. The results show that the ambient temperature, the HHA steel, presented a great absorption of energy.
Plenary
10/3/19, 9:25 AM - 10/3/19, 9:50 AM
Presenter(s): Eliane de paula clemente (Embrapa Solos), Mariana Guedes Guimarães (Universidade federal fluminense), Eliane de Paula Clemente (Embrapa solos), Paulo Cesar Teixeira (embrapa solos), Guilherme Kangussú Donagemma (embrapa solos), Silvio Roberto de Lucena Tavares (embrapa solos), Maria Fernanda Alvarenga Pontes (universidade federal fluminense), Natália Fernandes Rodrigues (universidade federal fluminense), Rosângela Straliotto (embrapa solos)
Abstract:
The steel slag, considered an environmental liability, is a viable alternative to the use of limestone, since it has neutralizing compounds of the soil acidity (CaSiO3 / MgSiO3) and important chemical elements for plant nutrition. On the other hand, most cattle ranchers usually do not correct the soil or fertilizer for pasture. In addition, work with slag-based fertilizers for grasses in Brazil is still scarce, especially for the sea of hills in the forest area of Minas Gerais. As well as, it can help in the deepening of the roots and in this way to take the pastures to have greater tolerance to drought. The objective of this study was to evaluate the effects of different sources (Limestone and Agrosilicon Plus), doses (0,25 - 0,50 - 1,0 - 1,5 times the recommended dose) and form of application of the corrective (incorporated and surface) on the forage grass Panicum maximum ‘BRS Zuri’. The experimental design was completely randomized, with four replications. The experiment was conducted in a greenhouse at the Fluminense Federal University, Niterói-RJ. The soil is a Dystrophic Yellow Red Latosol, clayey texture of Coronel Pacheco, MG. The soil was collected in the layer of 0-20 cm, dewatering, air dried and passed through a sieve of 2.00 mm. The experiment was carried out in plastic pots, with 5 kg of soil, for 45 days. The use of Agrosilicon Plus was efficient in the supply of N, P, K+, Na+, Ca2+, Mg2+ and S macronutrients for the culture. The Ca2+ and Mg2+ contents increased gradually with the applied doses. The corrective raised the pH value and brought the aluminum concentrations to zero. In addition, the silica corrective increased the content of Mg+2 in the foliar tissue in relation to limestone treatments. Agrosilicon Plus presented similar results to lime in P. maximum nutrition. This indicates that it can replace limestone in soil correction and in the supply of calcium and magnesium.
Plenary
10/3/19, 9:25 AM - 10/3/19, 9:50 AM
Presenter(s): CHARLES HENRIQUE XAVIER MORAIS MAGALHAES (Universidade federal de ouro preto), Gabriel Marques Magalhaes Mourao (Universidade Federal de Ouro Preto), Pablo Henrique Kelly Campos (Universidade Federal de Ouro Preto), geraldo lucio de faria (Universidade Federal de Ouro Preto)
Abstract:
TRIP steels are known to be part of the first generation of AHSS, so they are important alloys for the automotive industry. For such alloys to be subjected to heat treatments that adjust the microstructure according to the desired mechanical properties, it is essential to know the critical phase transformation temperatures mainly in a continuous cooling. In this context, this work proposed the execution of thermal austenitization cycles followed by continuous cooling under different rates simulated in a quenching dilatometer in order to obtain the transformation curves under continuous cooling (CCT diagram) for a TRIP780 steel. Applying OM and SEM, the microstructures were analyzed and the Vickers microhardness of each resulting microstructure was measured, presenting a tendency of logarithmic increase with the cooling rate. The CCT diagram showed that the critical transformation start temperatures of the diffusional constituents decrease as the degree of austenite super-cooling increases. In this same sense, the microhardness presented higher values due to the higher fraction of bainite and, mainly, martensite. Finally, lower cooling rates led to a lower martensite formation start temperature.
Plenary
10/3/19, 9:25 AM - 10/3/19, 9:50 AM
Presenter(s): FELIPE DA SILVA SIQUEIRA (Universidade federal fluminense), André Luiz Moraes Alves (UNIVERSIDADE FEDERAL FLUMINENSE), Guilherme Dias da Fonseca (UNIVERSIDADE FEDERAL FLUMINENSE), Daniel Gomes de Souza dos Santos (UNIVERSIDADE FEDERAL FLUMINENSE), Aline Cristine Lemos Duarte (UNIVERSIDADE FEDERAL FLUMINENSE), Weslley Luiz da Silva Assis (UNIVERSIDADE FEDERAL FLUMINENSE), Paulo Rangel Rios (UNIVERSIDADE FEDERAL FLUMINENSE)
Abstract:
With the increase of the complexity of the materials, two or more phases can take place simultaneously during a phase transformation. The new grains nucleation may occur by site saturation or by constant rate. In this context, this work aims to study the influence of simultaneous transformations with nucleation by constant rate in the kinetics, microstructure and grain size distributions in a tridimensional space. Also, for the purpose of comparison, a study of reactions in which one phase takes place by site saturation and the other occurs by constant rate and both start the transformation together was done. The computational results obtained were compared to analytical equations showing great agreement between models. According to the results, one observed that microstructure parameters like mean grain size and grain boundary morphology can help the researcher to identify the nucleation type either by site saturation or by constant rate.
Plenary
10/3/19, 9:25 AM - 10/3/19, 9:50 AM
Presenter(s): Renato Veloso Bueno (NOKIA)
Abstract:
We are at the beginning of an era of profound transformation and human progress — a new industrial revolution. This “Automation of Everything” era will be brought about by digital interfaces, data analysis and control of the physical world through networks employing the Nokia Bell Labs Future X1 architecture — networks to support the digitization and connection of everything and everyone with the goal of automating much of life. The interconnection of robots, machines, drones, sensors, processing platforms and people through Future X networks will provide transformative tools for the automation and optimization of factories and warehouses, ports, electric grids, transportation networks, food, healthcare, construction, logistics and supply chain, emergency response, mining, and other physical industries. To date, the level of automation has been modest at best. Automating these physical industries — industries that account for 70 percent of the US Gross Domestic Product, for example — has the potential to drive significant increases in the world’s economic productivity.2 Realizing the potential of this next industrial revolution will require billions of wirelessly connected endpoints for high fidelity physical-to-digital conversion, millisecond response times to tightly control and coordinate machines and robots, and intelligent analysis to optimize real-time decisions — tasks beyond the reach of current networks. Increased levels of automation are already being achieved through the use of 4G advanced wireless access technologies. The untethering of sensors and actuators in industrial environments through the low-latency, high-bandwidth, high-reliability, and massive scale provided by 5G wireless access will complete this evolution, providing an unprecedented ability to digitize, analyze, comprehend and manipulate the physical world at a scale never previously thought possible. These new capabilities will enable us to create digital models of the physical world with ever higher levels of fidelity, further enhancing our ability to improve operational efficiencies and increase productivity and worker safety. Doing this will require a dramatic evolution in network architecture toward massively distributed cloud control and baseband capacity to achieve the required ultra-low latency and ultra-high bandwidth for industrial and infrastructure automation services — the Future X architecture. In early 2019, Nokia Bell Labs will publish a sequel to “The Future X Network: A Bell Labs Perspective”. “Future X for Industries: A Nokia Bell Labs Perspective” will explore how the Future X architecture will automate many of the world’s physical industries, including chapters devoted to electric power, cities, rail, mining, public safety, manufacturing, ports, logistics and supply chain, and an overarching chapter devoted to securing this highly automated world. To give you a small taste of the feast that’s to come, we’re sharing with you an initial installment — “Future X for Industries: Mining” — the Nokia Bell Labs view of how mining will be transformed through a Future X architecture.
Plenary
10/3/19, 9:50 AM - 10/3/19, 10:15 AM
Presenter(s): andre alves de souza e silva (usiminas)
Abstract:
The market complexity and the structural difficulties of Brazil require continuous review of our logistics processes. Events such as the truckers' strike further pressure supply chain management to meeting commitments to customers while optimizing operating costs. Usiminas developed its logistical map to support the process of managing all its logistics operations and through advanced data analysis it has been able to identify opportunities to mitigate logistical costs increases and to optimize multimodal transport, exploiting to the maximum its distribution chain by road, rail and sea.
Plenary
10/3/19, 9:50 AM - 10/3/19, 10:15 AM
Presenter(s): Dimas Pereira Coura (GERDAU/UNIPAC)
Abstract:
The Brazilian territory is in the tropical region, like this the Brazil has great potential for the use the energy of the sun. The goal of this work is to design a system that takes advantage of the energy of the sun by photovoltaic technology in the steel sector, which is one of the largest consumers of electricity in the industrial sector. The study focuses on coke-integrated steel mills, and is based on the use of area installed in shed roofs, For which a standard area was defined to facilitate the analysis, defined the angle of inclination of the panels, the amount used, interference analysis and subsequently performed system viability considering the different irradiation rates according to the geographical location of each plant.
Plenary
10/3/19, 9:50 AM - 10/3/19, 10:15 AM
Presenter(s): ANDRE LUIZ VASCONCELLOS DA COSTA E SILVA (eeiMVR-UFF), Isabella Leite Ferraz (EEIMVR-UFF), Andreza Freire Marques (EEIMVR-UFF), Fernando Paulucio Quinelato (CSN)
Abstract:
Calcium additions are used to modify non-metallic inclusions in steels with requirements for isotropic properties, good castability and cleanness. Calcium, however, has high vapor pressure, low solubility in liquid steel and high cost. While the most effective way of adding calcium is through the injection of calcium-cored wires containing alloys such as CaSi or CaFe the timing of the addition during secondary metallurgy is important both concerning calcium yield and its effectiveness. In this work three routes for the refining of Al-killed steels are compared: ladle furnace (LF)-injection-casting; LF-injection-RH-casting and LF-RH-injection-casting. Each route has some process advantages and limitations. Heats processed by each route were evaluated to determine the effect of the route on calcium yield and effectiveness of Ca treatment, evaluated through computational thermodynamics. Heat analysis and casting temperature were used for the calculations. The advantages and limitations of each route, with respect to calcium treatment are discussed.
Plenary
10/3/19, 9:50 AM - 10/3/19, 10:15 AM
Presenter(s): francisco pereira netto (saint-gobain), bruno nery stoco (ternium brasil), Gilvan Nascimento de Souza (ternium brasil), Haysler Apolinário Amoroso Lima (saint-gobain), Vladnilson Peter de Souza Ramos (saint-gobain), Douglas Fernando Galesi (saint-gobain)
Abstract:
In a market dominated by Al2O3-MgO-C bricks, a monolithic carbon free working lining becomes a disruptive technology for a new level in terms of steel quality and energetic efficiency. This study explains the motivation and implementation of the first Brazilian steel ladle lining monolithic bottom casted in place, and shows an analysis of the results and advantages observed. A Ternium Brasil steel ladle was assembled with Al2O3-MgO refractories, and started to operate without any need to adjust the steel making operations. From the process data and the laser measurements, the wear of the refractory was calculated, the quality of interstitial free steel grades guaranteed and a greater preservation of steel temperature during secondary refinement confirmed.
Plenary
10/3/19, 9:50 AM - 10/3/19, 10:15 AM
Presenter(s): PEDRO MONTSSERRAT LOPES (APERAM SOUTH AMERICA), Bruno Costa Cordeiro (APERAM), Carlos Alberto Mourão (APERAM), Maurício Ferreira Coelho (APERAM), Evandro Geraldo Marque (APERAM), Huglesley Wagner Mendonça Silva (APERAM), Cristiano Ribeiro Lima (APERAM), Hélio Braz Loss (APERAM)
Abstract:
The production process of the stainless steels of the Aperam Timóteo plant has a typical flow: Electric Arc Furnaces (EAFs), AOD Converter, Ladle Furnace or Trimming Station and Continuous Casting. The cost of the EAF process is based on the main inputs (electrode, energy and refractory) and the metallic charge used for every specific product. For austenitic stainless steels, proper selection of the metallic charge per source of nickel and chrome is a key factor for the competitiveness of the product. This work aims to present the development stages for optimization of austenitic stainless steel charge cost through analysis, development and implementation of a suitable model to establish the best metallic charge that meets the processs and equipment technical criteria with the lowest cost. The project performed reached a significant reduction of the cost of the charge used with only solutions elaborated internally by the Melt Shop technical team. The project met the goal to increase the competitiveness of austenitic stainless steels.
Plenary
10/3/19, 9:50 AM - 10/3/19, 10:15 AM
Presenter(s): THIAGO PINTO SILVA (VALE - NOVA LIMA), Leandro Rocha Lemos (UFMG), Luiz Fernando Andrade de Castro (UFMG)
Abstract:
This paper shows an evaluation about effect of dispersant sodium silicate along to limestone, in the form of pulp, on the cold agglomeration process for iron ore sintering. Before that, it was verified the effect of pH, solids content and amount of dispersant on the stability of the system (limestone, water and sodium silicate). It was found that the lower the solids content, the more alkaline pH and the amount of sodium silicate equal to 20 l for each 1t of limestone, was the level of dispersion of the system. The influence of the limestone pulp with dispersant depended on the granulometry of the ore mixture and the type of technological route. For the thinner type (42,8% <0.15mm), the limestone pulp with dispersant reduced the resistance of the adherent layer of the cold agglomerates, regardless of the technological route. However, for the coarser type (24,7% <0.15mm), the limestone pulp with dispersant increased the average size of the aggregates, preserving the resistance of the adherent layer when manufacturing with two intensive mixers in series.
Plenary
10/3/19, 9:50 AM - 10/3/19, 10:15 AM
Presenter(s): Daniel Scandiuzzi Valença de Castro (Universidade federal do RIO de Janeiro), Rafael de azevedo cidade (Universidade Federal do rio de janeiro), Enrique Mariano Castrodeza (Politecnico di milano)
Abstract:
The work proposes the use of data provided by digital image correlation for the calculation of the fracture toughness of a laminated composite subjected to dynamic compression. Tests were performed on a Hopkinson pressure bar using DENC (double edge notched) geometry specimens painted with a speckles pattern. The specimens were recorded during the test by a high-resolution temporal camera. Based on captured images and speckles’ distribution, a model was proposed to determine the most appropriate analysis parameters. From the displacement and deformation fields provided by the digital image correlation, the toughness was estimated using the Integral-J method, considering the inertial effects. It was demonstrated that the integral-J method integrating in area inside the contour has good applicability and is less sensitive to method parameters, presenting a maximum discrepancy of 14% between the results for the same sample. However, for the results of different samples of the same class, no satisfactory consistency was observed, but it was found, at a certain level, agreement with the values found by Kuhn et al [1] for the same material using another methodology. In parallel, it was concluded the inertial effect is negligible, indicating a state of dynamic equilibrium in which quasi-static approaches can be applied.
Plenary
10/3/19, 9:50 AM - 10/3/19, 10:15 AM
Presenter(s): VANESSA VERÍSSIMO DOS SANTOS (UNIVERSIDADE FEDERAL DE OURO PRETO), Ricardo José de Faria (GeRDAU AÇOMInas), GERALDO LÚCIO DE FARIA (UNIVERSIDADE FEDERAL DE OURO PRETO)
Abstract:
With the aim to manufacture a high performance steel with favorable mechanical properties for structural applications, the concept of controlled rolling associated with the influence of niobium and titanium as microalloying additions has been extensively studied. These elements, when in solid solution, affect the critical temperatures of phase transformation and the steel recovery and recrystallization behavior, leading to obtaining a product with a good mechanical strength-toughness ratio. The present work compares the mechanical performance of two hot-rolled steels: i) a common low-carbon-steel (ASTM A36); ii) a low-carbon-microalloyed-steel with niobium and titanium additions (ASTM A572). The selected steels have similar base chemical composition, however as the ASTM A572 is microalloyed, it was thermomechanically rolled while ASTM A36 was conventionally hot-rolled. The two rolled products were submitted to microstructural characterization procedures and to mechanical tests. * Contribuição técnica ao 74º Congresso Anual da ABM – Internacional, parte integrante da ABM Week 2019, realizada de 01 a 03 de outubro de 2019, São Paulo, SP, Brasil. The mechanical proprieties of the ASTM A572 steel were substantially higher than the ASTM A36 one. The microstructure of both steels consists of pearlite and ferrite. The microalloying element additions in concomitance with the controlled rolling process contributes to the refining of ferrite grains increasing the mechanical proprieties of the ASTM A572 steel.
Plenary
10/3/19, 9:50 AM - 10/3/19, 10:15 AM
Presenter(s): LUIZ CLAUDIO PINTO OLIVEIRA (ENSORESO Consultoria e Projetos Ltda.), José carlos D'Abreu (PUC-Rio)
Abstract:
Dusts and sludges generated in the exhaust gas dedusting systems of the BOF converter play a relevant role among the steel by-products due to their significant generation, difficulties in handling and storage, associated with high cost for processing and / or disposal in controlled landfills. On the other hand, their high iron content guarantees a significant potential to replace other primary materials in metallurgical processes. The cooling effect of iron ore is about three times that of steel scrap. BOF dust briquettes contains iron in different stages of oxidation and thus, its cooling effect presents an intermediate condition. One method developed for the recycling of BOF dust comprises cold agglomeration via briquetting, for use as coolant material in the BOF converter. In this work, the cooling effect of BOF dust briquettes is compared with other coolant materials, both theoretically and operationally. Considering that the steel scrap has a cooling capacity of 340 kcal / kg, it has been found that the cooling effect of the briquettes is about 1.8 times higher than that of the scrap and the cooling effect of the iron ore pellets is 2.8 times that of the scrap.
Plenary
10/3/19, 9:50 AM - 10/3/19, 10:15 AM
Presenter(s): Edglay de Almeida rocha filho (Universidade federal do rio grande do norte)
Abstract:
Plasma nitriding allows the improvement of various physical properties of metal surfaces, such as hardness, wear resistance and corrosion. In metal pipes, a major challenge lies in how to reduce the effects of internal corrosion generated by the transfer of liquids and their contaminants. In this sense, the present work proposes to produce thin films of iron nitride in a carbon steel pipe to reduce corrosion and improve mechanical properties. The Cathodic cage Plasma nitriding (CCPN) was used, with a 316 L stainless steel cage used inside the sample, varying the temperature and gas atmosphere. The deposition of thin films generated by the external sputtering of the cage was purchased through the techniques of X-ray diffraction (XRD), scanning electron microscopy (SEM) and microhardness analysis. Iron nitride phases were present in the treated samples witch suggest the incriase of corrosion resistence. In addition, with increasing temperature an increase in thin films in the samples occurred.
Plenary
10/3/19, 9:50 AM - 10/3/19, 10:15 AM
Presenter(s): Gabriella maria silveira de sá (Universidade federal fluminense), Harison da Silva Ventura (UNIVERSIDADE FEDERAL FLUMINENSE), Mariana Sizenando Lyrio (UNIVERSIDADE FEDERAL FLUMINENSE), Ana Gabriella Conceição dos Santos (UNIVERSIDADE FEDERAL FLUMINENSE), Weslley Luiz da Silva Assis (UNIVERSIDADE FEDERAL FLUMINENSE), Paulo Rangel Rios (UNIVERSIDADE FEDERAL FLUMINENSE)
Abstract:
The Grain contour nucleation is one of the most important in most metals used in engineering. A classic example is the ferrite nucleation in the austenitic grain contour, but this type of nucleation is also predominant in recrystallization. In this paper, the computational computations are applied in order to study the phase transformation in the equiaxial grains and in the deformed contours. The equiaxies grains are represented by Poisson-Voronoi polyhedrons and grains deformed by ellipsoids of different aspect ratios. The results are compared with the analytical models of JMAK and CAHN. The final microstructure is not visibly affected by the aspect ratio of the polyhedra predecessor. However, it is a transformation kinetics of recrystallized grains. However, the kinetics of transformation of the recrystallized grains is significantly altered.
Plenary
10/3/19, 9:50 AM - 10/3/19, 10:15 AM
Presenter(s): MARCOS DE OLIVEIRA FONSECA (GE Digital), Deusdedit Araujo e Motta (GE DIGITAL), Marlon Rosa de Gouvea (gerdau)
Abstract:
Digital Transformation is the buzzword in the entire world market and in the industry is no different, especially regarding Asset Management. Among the various Predictive Analytics techniques available, some stand out for their ability to easily learn asset’s behavior from historical data and being able to monitor small deviations that are related to the failure modes of interest. This paper presents how to extend the Similarity Based Modeling Artificial Intelligence’s technique for application on assets that have a fast operation or working dynamics for their steady states. The results of this approach are demonstrated in practical applications that exemplify how to increase the outcomes provided by this technique for the performance of assets and the business.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): ALINE CRISTINE LEMOS DUARTE (UFF), Mariana Sizenando Lyrio (UFF), Harison da Silva Ventura (UFF), André Luiz Moraes Alves (UFF), Felipe da Silva Siqueira (UFF), Weslley Luiz da Silva Assis (UIFF), Paulo Rangel Rios (UFF)
Abstract:
The nucleation in the grain boundaries is a recurrent phenomenon in metallic materials. Several authors such as Cahn and Rios and Villa, using the nucleation approach in planes and random lines, treated this situation. In this work one studied nucleation in the boundaries of the Poisson-Voronoi polygon and a 2-d hexagonal matrix with analytical methods and computational simulation. An equation based on the Cahn method for nucleation in the grain boundaries was proposed. For nucleation in the boundaries of the Voronoi polygon the equation did not show total adequacy with the simulated results for two different types of cases. On the other hand, for the boundaries of the hexagonal matrix it was noticed that the greater number of points drawn in the matrix, the simulated results agreed with the equation proposed
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): ALLAN RIBEIRO DE SOUZA (instituto nacional da propriedade industrial, inpi), Juan garcia de blas (Programa de Engenharia Metalúrgica e de Materiais, COPPE/UFRJ)
Abstract:
The use of the finite element method (MEF) pursuing a more realistic determination of the structural strength of structural steels under fire actions has been growing as more countries are adopting performance-based codes rather than traditional prescriptive codes. The MEF algorithm interprets the thermomechanical behavior of the steel through the establishment of constitutive models. The conventional constitutive models used in fire engineering are of an empirical nature and address the phenomena of work hardening and creep in a dissociated form. This work presents in broad terms a unified constitutive model of physically based kinetics of plastic deformation resulting from the dislocations slip, work hardening and dynamic recovery, inspired by the contributions of Kocks, Mecking and Estrin. The proposed model has its mathematical structure modified for variable temperature conditions, that is, for fire scenarios.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): CHARLES HUDSON MARTINS DE VASCONCELOS (INSTITUTO MILITAR DE ENGENHARIA), isaque alan brito moura (instituto militar de engenharia), Mônica Aline Magalhães Gurgel (INSTITUTO MILITAR DE ENGENHARIA), Tatiane Santos Ferreira (PAUMIR DE BARRA MANSA INDÚSTRIA E COMÉRCIO LTDA), Andersan dos Santos Paula (INSTITUTO MILITAR DE ENGENHARIA)
Abstract:
Dual Phase (DP) steels are characterized by a ferritic-martensitic microstructure, which consists of an equiaxial ferrite matrix with 10 to 20% dispersed islands martensite. In this work, samples of low C steel, Nb and Mo micro addition, were used in the cold rolled condition (BFH). The physical simulations, in laboratory scale, were conducted with the objective of obtaining a characteristic microstructural aspect of a DP steel even after thickness reduction through cold rolling and intercritical annealing. The soaking temperature was 800 °C during 180 seconds for intercritical annealing, followed by cooling under two conditions: in water (to criticize the austenite formed fraction on soaking as a function of the ferrite recrystallization potential) and in air (inferred in the ferrite formation and subsequent perlitic, bainitic and / or martensitic transformations in the course of cooling). Using scanning electron microscopy (SEM), it was observed that to obtain the DP steel microstructure characteristic it would be necessary to adjust the annealing parameters as a function of the reduction applied in cold rolling, ie increasing the cold rolling percentage reduction, it is necessary to decrease the soaking temperature or the time so that adequate results are obtained the characteristics of a DP steel.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): Elaine felix da silva (Laboratório de ensaios não-destrutivos, corrosão e soldagem)
Abstract:
The chemical composition of the oxide layer formed on a niobium-modified heat-resistant stainless steel of the HP degree (HP-Nb) during operation in a steam reformer furnace for 70000 h, was investigated by confocal Raman spectroscopy, aiming at correlating the chemical and morphological characteristics of the oxides with the aging state. Raman spectra, acquired at random points of the oxide scales reveal that Fe oxides (-Fe2O3 e Fe3O4) as well as mixed oxides NiFe2O4 and NiFeMnO4 are the main species present at aging state I. Aged samples give rise to Raman spectra characteristic of Cr2O3, MnCr2O4, Fe3O4 and NiFe2O4, showing good agreement with the recent literature.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): emanuel do couto pessanha (universidade estadual do norte fluminense - uenf)
Abstract:
The Young modulus has notable relevance in physical metallurgy, since it has a close relationship with other properties that has great importance in the selection and application of the materials. Ti-6Al-4V and AISI 4130 are among the most widely applied alloys in conditions tha requiring titanium or steel alloy. In this work the main objective is - through the application of annealing and quenching heat treatments - to obtain stable phases in half of the samples and of metastable phases in the other half of the samples. After, the impulse excitation technique (IET) will be applied in order to determine the behavior of the elastic moduli of the alloys for stable phases and for metastable phases at room temperature and in function of temperature - during heating.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): erica Marcelino Freitas de Souza Silva (UNIVERSIDADE FEDERAL FLUMINENSE ), GLAUCIO SOARES DA FONSECA (UNIVERSIDADE FEDERAL FLUMINENSE), Lucas Rosate Leite dos Santos (UNIVERSIDADE FEDERAL FLUMINENSE)
Abstract:
Austenitic Stainless Steels (ASS) are widely used not only due your good corrosion resistence, but because they are widely conformable, manufacturable, lasting and weldable by almost all welding process. At room temperature, homogeneous wrought alloys of this type are usually completely austenitic However for many aplications this alloys require to be subjected a metallurgical process like welding, that can cause microstructural changes. Therefore an alloy that before was completely austenitic, can now present fraction of retained delta ferrite. The present work investigates the influence of heat input on an evolution of the ASS 316L weld microstructure subjected to similar welding in two different heat input by autogenous TIG process. The welded sample microstructure analysis carried out by optical microscopy. The results allowed to conclude that heat input really affected on a final 316L microstructure, because, after de welding, for both heat input applied the microstructure was composes of austenite and delta ferrite and not only by austenite predominance like early present the metal base
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): GUSTAVO DORIA LIMA (universidade federal de sergipe), Isau de Souza Alves Junior (universidade federal de sergipe), Brenno Lima Nascimento (universidade federal de sergipe), Marcos Menino de Macedo Filho (petrobras), Matheus Porto Trindade (universidade federal de sergipe), SANDRO GRIZA (UNIVERSIDADE FEDERAL DE SERGIPE)
Abstract:
The thermal oxidation treatment of the Ti-6Al-4V alloy was realized in the air at 600 ° C for 2h, 5h and 10h. The fatigue behavior was analyzed and compared to that of the untreated alloy. Characterization was made through optical and electron microscopy analysis, x-ray diffraction and roughness measurement. The XRD results showed growth of rutile peaks. There was an increase in the average thickness of the formed layer from 0.12 μm to 1.09 μm by increasing the treatment duration from 2 to 10 h. The results indicated reduction of fatigue strength of 35% for oxidized samples for 2 h, 27% for oxidized samples for 5 h and 29% for samples treated for 10 h, in relation to the test with untreated specimens. The detrimental effect caused by the layer formed after oxidation of 2 h was as damaging as that caused by the layer formed after 10 h despite the difference between the thicknesses of the layers. The morphology found in the fractured samples indicated surface embrittlement of the oxidized samples, contributing to the nucleation of initial cracks in the first cycles of fatigue in the layer that favored the propagation of fatigue, independent of the layer thickness.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): GUSTAVO HENRIQUE PELISSARI (UFSCar), Vitor luiz sordi (ufscar)
Abstract:
The AISI 201LN is an austenitic stainless steel with low Nickel content when compared with traditional steels from the 300 series and has Manganese and Nitrogen to stabilize the austenitic phase. The steels from the 200 series propose to replace some stainless steels in some applications due to their lower cost caused by the reduction of Nickel, however, there are little information about their high temperature strain behavior. The aim of this paper is to study the tensile strength of an AISI 201LN at room temperature and in the range from 500ºC to 800ºC and creep strength at 700ºC. It was observed that when compared with the traditional austenitic stainless steels from the 300 series, the material presented tensile strength at room temperature equivalent and it has preserved excellent ductility – strength relation from 500ºC to 800ºC. The AISI 201LN presented great behavior when subjected to creep tests at 700ºC, similar to some austenitic stainless steels that are widely used for high temperature applications, encouraging further study in other ranges of stresses and temperatures
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): VIVIANE TAVARES de Moraes (IMT), Erivan Cardoso Rocha (Acrilex), Cilene Cláudia Diógenes (Faculdade Senai de tecnologia ambiental), Antônio Donizetti Giuliano (IPOG), Fernando Codelo Nascimento (IPOG)
Abstract:
In ornamental lakes, there is usually difficulty to control the algae proliferation because the existence of light exposure and the availability of nutrients derived from the food given to the fish allow the growth and development of the algae. An alternative to treatment is the advanced oxidation. Among the advanced oxidation processes (AOPs) available, the ozonation was chosen in order to present a water treatment process to control the algae proliferation in an ornamental lake without damaging the aquatic community living in the lake subject to this study. The methodology used was the case study of the lake, supported by reference researches. The project was developed through the following steps: building the ornamental lake; defining the treatment system; monitoring the parameters such as: biochemical oxygen demand (BOD), color, potential of hydrogen (pH), temperature, ammonia (NH3), and dissolved oxygen (DO) of the lake during 3 months; applying ozone to control the algae proliferation; and monitoring the same parameters during the ozonation process. Among the main results found are: the reduction of 170 Cobalt-Platinum units (UCP) of the greenish color of the lake water; about 60% decrease of BOD; 16% increase of DO concentration; and 80 to 100% decrease of NH3 concentration, eliminating the unpleasant smell and improve the quality of the water
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): VIVIANE TAVARES de Moraes (IMT), Guilherme Wolf Lebrão (Centro Universitário do Instituto Mauá de Tecnologia), Susana Marraccini Giampietri Lebrão (Centro Universitário do Instituto Mauá de Tecnologia), Amanda de Andrade Prioli (Centro Universitário do Instituto Mauá de Tecnologia)
Abstract:
The furniture industry generates about 19,255,000 m³ / year of wood waste with potential for recycling of materials. This project aims to minimize the final destination of Medium Density Fiberboard (MDF) waste through the development of a reprocessed MDF laminate. In order to do so, the raw MDF was produced by laser cutting, then the material was ground in a knife mill and quartet. The crushed MDF residue was blended with polyester resin in the proportions of 1 to 3 polyester resin by weight. From the formulation a laminate of 3 to 4 mm thickness was made, where also test specimens were developed to perform mechanical tests, such as tensile, flexural and impact tests, to determine the properties of the new laminate. The expected results are the identification of the ideal proportions between resin and crushed MDF and the impact, tensile and flexural strength determined by the mechanical tests
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): VIVIANE TAVARES de Moraes (IMT), Jefferson Salvador de Moraes (Aslan Ambiental), Guilherme Wolf Lebrão (Centro Universitário do Instituto Mauá de Tecnologia), Susana Marraccini Giampietri Lebrão (Centro Universitário do instituto mauá de tecnologia), Jorge Alberto Soares Tenório (LAREX - Escola Politécnica da USP)
Abstract:
Mining and ore waste or mud is waste from mineral extraction and beneficiation processes and in turn are usually stored in tailings dams, which is the environmental passive. Some mud reclamation forms have already been developed, although the main use is based in civil construction aggregates, aiming to minimize the mud generation. In this way the work is a characterization of the red mud residue. For this the means of classification of residues is used, such as: humidity test; size grain analyses; alkalinity test; MEV / EDX and X-ray fluorescence. The characterization analyzes converged to elemental quantitative results of 8.3% Al; 3.8% Na; 6.3% Si; 0.4% Fe; 0.4% Zr; 0.004% of Y, 2% Ti and 0.009% of Sc.This characterization can define parameters which influence the method to recover metals
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): VIVIANE TAVARES de Moraes (IMT), Renato Souza e Silva (Centro Universitário do Instituto Mauá de Tecnologia), Susana Marraccini Giampietri lebrão (Centro Universitário do Instituto Mauá de Tecnologia), Guilherme wolf Lebrão (Centro Universitário do Instituto Mauá de Tecnologia), Jorge alberto soares tenório (escola politécnica da usp)
Abstract:
Electrical and electronic wastes can be applied by equipment or parts thereof, which have become obsolete, have stopped working or have defects during their production. Printed circuit boards (PCBs) are presented in electrical and electronic equipment composed of metallic, ceramic and polymer materials. To some metals there are recover process, although some process use the pyrometallurgical technic which supplies toxics substances. Therefore, these processes are based on pyrometallurgical techniques that can release toxic substances. In order to minimize the environmental impact it is proposed to PCBs benefit from a hydrometallurgical route to recover copper in solution. For this purpose, the mills were crushed, followed by chemical characterization. It was separated for the hydrometallurgical route in acid medium and in oxidizing medium. The resulting copper solution was decreased by reduction reaction with ascorbic acid. The results of the 97% recovery of copper from the PCIs with the evaluation of copper.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): adalberto calazans de souza júnior (instituto federal do espírito santo)
Abstract:
Weathering steels come from steels containing Cu at the beginning of the 20th century. They are steels with low C content and increased corrosion resistance due addition (up to 3 to 5%) of elements such Cu, P, Si, Cr and Ni, that are subjected to specific climatic conditions with wet/dry cycles. Through this study, it was analysed the electrochemical behaviour of a weathering steel (steel B) exposed for 36 months in marine atmosphere, by comparison with carbon steel (steel A), using potenciodynamic polarization tests with 3.5% NaCl electrolyte and 0,5M Na2SO4 electrolyte. The patina formed in the sample of weathering steel presented a higher performance in the corrosion behaviour in relation to the sample without patina, reducing the density current in 88.54% in the NaCl solution, increasing the corrosion potential in 26.29% in the NaCl solution and increasing by 17.1% in the 0.5 M Na2SO4 solution.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): GERSON ORTIZ GALLO (Instituto Nacional de Tecnologia (Int)), Fernando Cosme Rizzo (Pontifícia Universidade Católica do Rio de Janeiro(PUC-Rio)), Mauricio de Jesus Monteiro (INSTITUTO NACIONAL DE TECNOLOGIA (INT)), Axel Kranzmann (Bundesanstalt für Materialforschung und -prüfung (BAM)), Wencke Schulz (BUNDESANSTALT FÜR MATERIALFORSCHUNG UND -PRÜFUNG (BAM)), Marianne Nofz (BUNDESANSTALT FÜR MATERIALFORSCHUNG UND -PRÜFUNG (BAM)), Regine Sojref (BUNDESANSTALT FÜR MATERIALFORSCHUNG UND -PRÜFUNG (BAM))
Abstract:
Energy generation through the burning of fossil fuels is today one of the most used processes in the world. The recently increasing CO2 in the atmosphere is a major contributor to global warming. Oxyfuel is a process that allows a more efficient and clean use of coal with zero CO2 emissions. However, due to the characteristic environment of this process, which is composed of a mixture of flue gases mainly by H2O-CO2 at high temperatures, industrial plant heat exchanger piping using this technology undergoes a severe corrosive process. The development of new thermally and chemically stable protective coatings capable of resisting this corrosive process is an alternative. In this work, a comparative study was carried out between the efficiency of an Al2O3 alumina coating and that of a double coating of Al2O3+AlPO4 in the protection of P92 steel in an environment typical of the oxyfuel process. Optical microscopy, scanning microscopy and X-ray energy dispersion spectroscopy techniques were used to characterize the oxidative process. The results demonstrated a high corrosion resistance in both coatings with the formation of protective Mn / S / O oxides, indicating a lower degree of oxidation in the double coating.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): Jaqueline Polezi Mazini (iFES), André Itman Filho (Ifes), Breno Mendes Rabelo Ávila (Ifes), Dirceu da Silva Junior (Ifes), Pedro Gabriel Bonella de oliveira (USP)
Abstract:
High strength and low alloy steels are widely used in petroleum pipes manufacturing, because presents mechanical properties according to API standard. The main manufacturing process for these steels is the controlled rolling, however, for complex geometry parts, forging is preferred. In this case, quenching and tempering heat treatments are necessary to reach the desired properties. Besides mechanical and high-pressure requests which the pipes must support, these materials must still resist seawater corrosion. In this context, the current work goal is to evaluate the microstructure, impact and corrosion resistance of two microalloyed steels with different niobium and molybdenum content. Initially two steels ingots were forged and subsequently subjected to quenching followed by tempering treatments. From the tempering curve, an average temperature of secondary hardening range, according to literature results, was selected to impact and potentiodynamic polarization tests. The results show that the steel with highest niobium content delivers higher impact and corrosion resistance, while the steel with higher molybdenum content delivers higher hardness.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): julianna magalhães garcia (IME - INSTITUTO MILItar de engenharia), luiz paulo mendonça brandão (ime - instituto militar de engenharia), ulisses oliveira costa (ime - instituto militar de engenharia), fabio da costa garcia filho (ime - instituto militar de engenharia)
Abstract:
The aim of the present study is to clarify the creep behavior in samples made from AISI 310 steel. Creep tests were performed on notched specimens on the sides in the thickness direction, under 3 stress conditions (225MPa, 160MPa and 100MPa) at temperature of 675ºC, in order to analyze the fracture and the deformation caused in the material. The characteristic of the fracture surfaces was dependent on both stress and temperature, with a fracture transition from ductile, with dimples formation, to brittle intergranular fracture, evidenced by the cavities in the grain boundaries. It was also observed the coalescence and growth of microcracks on the side of the specimen in a region at 45º from the tip of the notch, characteristic of the propagation of damage caused by the creep test.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): Laerte Correa dos santos (Centro universitário anhanguera de niterói), pedro henrique poubel mendonça da silveira (instituto militar de engenharia), alaelson vieira gomes (instituto militar de engenharia)
Abstract:
HSLA (High-Strength Low-Alloy Steel) steels are a category of used metal alloys in the automotive industry. Its production takes place through a process of controlled lamination, followed by heat treatment of annealing to relieve stresses. The objective of this work was to perform continuous annealing treatment with different temperatures and annealing times on samples of a HSLA SAE J2340 - 340X steel. For this, the following annealing temperatures were used: 720°C, 760°C and 800°C, with annealing time in 120s, 260s, and 600s. The values of yield strength and hardness were decreasing as the temperature and annealing time were increased.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): LEANDRA CARLA APARECIDA CORDEIRO (IME - INSTITUTO MILI), Yuri Mikael dos Santos Alves (IME - INSTITUTO MILItar de engenharia), Carolline Serafim da Silva (csn), camila de oliveira souza (IME - INSTITUTO MILITAR DE ENGENHARIA), Náhrima Chambela Moraes (IME - INSTITUTO MILITAR DE ENGENHARIA), Andersan dos Santos Paula (IME - INSTITUTO MILITAR DE ENGENHARIA), Luiz Paulo Mendonça Brandão (IME - INSTITUTO MILITAR DE ENGENHARIA)
Abstract:
In this work three methods of quantification of the martensite volumetric fraction formed in the ASTM 201LN steel during the rolling process were evaluated. To this end, four samples of this material were laminated at room temperature (~25 ° C) with 8, 9, 10 and 11 deformation passes with approximately 10% thickness reduction at each pass. Phase quantification was performed by means of a ferritoscopy and two methods from the XRD diffractograms: areas relation of the highest intensity peaks and Rielveld method. The obtained results of the phase quantification by the three methods presented showed that the volumetric fraction of martensite increased as there was an increase of the deformation, although the values found by the technique of ferritoscopy were lower than those obtained by the XRD methods. This can be explained due to errors inherent in the technique of Ferritoscopy, as well as the technique of ferritoscopy resulting from data of expressive volumes of the sample while the XRD of a layer less than 10 μm below the surface. Regarding the values obtained by the XRD methods, both presented close values, although it was observed that the Rietveld method was considered the most accurate because it presented values of GOF (Goodness of fit) of less than 1,7, thus showing a good quality and accuracy of refinement.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): lucas menezes de souza (universidade estadual do norte fluminense), Elaine Cristina Pereira (universidade estadual do norte fluminense), sandro alberto ibarra sanchez (UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE), sergio neves monteiro (Instituto Militar de Engenharia)
Abstract:
In this work the influence of the corrosive medium and the temperature on the corrosion resistance property of the duplex stainless steel S31803 was analyzed. The corrosive process was carried out in two samples using 1.5% hydrochloric acid solution at room temperature and the same solution at 50ºC. The microstructure of the sample as received was analyzed before and after a corrosive process using the confocal microscopy technique. Then, the hardness, tensile tests were carried out to determine the mechanical properties and the corrosion rate, in order to analyze the corrosion resistance. It was verified that the sample as received presents a microstructure consisting of a double phase, one being the ferrite and the other the austenite in proportions of 50% each. It was evidenced that the duplex stainless steel S31803 after the corrosive process in the temperature of 25ºC maintained the same limits of tensile strength, ductility and also tenacity in relation to the sample as received. However, when subjected to the corrosive medium at 50ºC, there was a decrease in the values of its properties, thus justifying a higher corrosion rate when submitted to the hydrochloric acid medium at 50ºC.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): NAHRIMA CHAMBELA MORAES (IME MILITAR DE ENGENHARIA), Camila Oliveira de Souza (IME), Carolline Serafim da Silva (Galvasud), Milton Sergio Fernandes de Lima (Instituto de Estudos Avançados), Andersan dos Santos Paula (IME)
Abstract:
The present material is an austenitic stainless steel ASTM 201LN in the hot rolled condition and annealed at 1050 °C (referred to as received - CR), which was thermo-mechanically treated for grain refinement. The thermo-mechanical processing adopted in this work consisted of two rolling stages at room temperature, 8 runs with 10% reduction each, with two annealing steps to reverse martensite in austenite, using a soaking temperature of 750 °C and time of 15 min. The samples of fully austenitic sheets and extracted during the processing stages (CR and annealed after the first and second cold rolling stages) were tested for welding with 7 combinations of powers and speeds, using an Yb:fiber laser of 2 kW power and 1.07 μm wavelength. Surface macroscopic and microstructural analyzes were performed, where it was possible to estimate the best laser welding parameters for each sample, through observations such as full penetration and dimensions of the fusion zones. For the CR sample, only the welding test with higher power and lower speed reached full penetration. For the treated samples, higher power and higher speed of welding provided the smaller dimensions of fusion zone. It was also possible to analyze the morphology and shape of the welds.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): NATASHA NOGUEIRA DE MORAIS (CEFET-MG), ELAINE CARBALLO SIQUEIRA CORREA (CEFET-MG), WELLINGTON LOPES (CEFET-MG), Carlos ferreira da silva (cefet-mg), Adriene anita dos santos pimnta (cefet-mg)
Abstract:
Hot work tool steels are those used in tooling that work at high temperatures, reaching up to 500 ° C in operation. These steels are mainly applied in the manufacture of forging, extrusion and die castings. In this context, the objective of this work was to evaluate the mechanical behavior and microstructure of three different tool steels for hot work, AISI H13, AISI H11 and DIN 1.2367, subjected to different austenitization temperatures on quenching. The evaluation was carried out using the techniques of optical and scanning microscopy, as well as mechanical tests of hardness, impact and tensile test. The results showed that the increased temperature of austenitization in quenching promoted an increase in the hardness of the materials, due to the increase in the volumetric fraction of the martensite formed. In the Charpy impact tests the higher silicon content led to a lower level of energy absorbed by AISI H13 steel. In terms of tensile strength, for the three steels, it was observed an increase of the ultimate tensile strength and, in general, in the yield, with the increase of the austenitization temperature.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): SUSANA MARRACCINI GIAMPIETRI LEBRAO (IMT), Giovanna Scala (IMT), Gustavo Victor Relva Rollo (IMT), Fabio Noveli Faggian (IMT), José Agustín Castillo Lara (Centro Universitário Fundação Santo André), Marco Antonio Colosio (General Motors Mercosul)
Abstract:
The intergranular corrosion susceptibility was evaluated in the heat-affected zone of the welded joint of the AISI 409 ferritic stainless steel, applied to the hot part of the vehicle exhaust system. The joints were made using the same exhaust manifold manufacturing process. Sensitization in ZTA was evaluated by potentiodynamic electrochemical reactivation (DL-EPR) and electrolytic etching in 10% oxalic acid, according to ASTM 763. The AISI 409 steel showed an increase in the degree of sensitization after welding, but there was no increase in the sensitization of welded material after heat treatments at 750C
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): SUZANE DE SANT'ANA OLIVEIRA (IME - Instituto MILITAR DE ENGENHARIA), Karollyne Gomes de Castro Monsores (IME - instituto militar de engenharia), Anderson Oliveira da Silva (IME - INSTITUTO MILITAR DE ENGENHARIA), Géssica da Silva Nicolau (IME - INSTITUTO MILITAR DE ENGENHARIA), Vinicius de Souza Pereira (IME - INSTITUTO MILITAR DE ENGENHARIA), ricardo pondé weber (IME - INSTITUTO MILITAR DE ENGENHARIA)
Abstract:
Metallic materials are the most used in battle cars, this factor due to the low cost when compared to the polymeric materials, ceramic and composites, besides the excellent properties obtained by means of the appropriate thermal treatments, namely tempering and tempering. Before armor is analyzed ballistically and dynamically, its mechanical properties must be related to those presented in the norms governing its manufacture. The Brazilian Army (EB), together with the National Steelworks is carrying out different races, destined to the development of the adequate armor for the New Family of Armored On Wheels (NFBR). Thus, this work aims to analyze and evaluate by Vickers microindentation tensile, impact, hardness and hardness tests, if this new steel can be tested ballistically and dynamically.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): bruno ribeiro pinheiro (universidade federal do ceará ), ana karine pereira de almeida (universidade federal do ceará ), marcelo josé gomes da silva (universidade federal do ceará )
Abstract:
The objective of this study was treat termally, by cementation and solubilization, and characterize samples of steel AISI 304H austenitic stainless steel in order to simulate of the termal process of aging in a reducing enviroment. The sample that was used for this study was received containing dimensions of 200 mm x 100 mm x 10 mm, taken to the oven and subjected to a cementation for 450 hours at a temperature of 850ºC. A posterior solubilization was made at a temperature of 1100ºC for 4 hours, to restore the anticorrosive properties and promote a dissolution of the carbide. A metallographic characteristics of the microestructure were evalueted by quantification of phases and mechanical properties by means of optical microscopy. Regarding the aplication of these steel, it was observed a hight sensitization in the aged sample due to the medium that is commonly inserted and a considerable hardness gain in the solubilized sample.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): Cynthia Serra Batista Castro (centro de Inovação e tecnologia senai fiemg), Túlio césar nogueira (CENTRO DE INOVAÇÃO E TECNOLOGIA SENAI FIEMG), Diana Perez Escobar (CENTRO DE INOVAÇÃO E TECNOLOGIA SENAI FIEMG), Ronaldo Barbosa (CBMM)
Abstract:
The thermomechanical behavior during continuous cooling and the microstructural characteristics of a High Temperature Processing (HTP) steel with low carbon and manganese and high niobium was studied by deformation dilatometry aiming at studying the best conditions for increasing the acicular ferrite fractions. The phase quantification was performed by scanning electron microscopy and Electron Backscattering Diffraction (EBSD). The results showed an increase in the acicular ferrite (AF) fraction with increasing of the cooling rate from 5°C/s to 10°C/s. At 20°C/s the fraction of AF remained unchanged indicating that, for this thermomechanical processing, there is a limit on the acicula ferrite fraction that can be nucleated
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): dÁVILA DE oLIVEIRA vIANA (uNIVERSIDADE fEDERAL DO cEARÁ)
Abstract:
The purpose of this work is to present a relationship between thermal treatment and corrosion resistance in SAE 1010/20 - A36 Steel, analyzing this behavior by means of Electrochemical Impedance Spectroscopy (EIS) tests. The appearance of a phenomenon called banding, which was identified in the sample, and the minimization of this effect through the heat treatment of full annealing, was presented in this work in order to complement the conclusions obtained. Also, grain size calculations showed that there is an increase in the size of the austenitic grain and, later, how this increase can modify the physical properties of the steels (consequence of the variation in grain boundary density). The relationship between grain size and corrosion resistance is not direct, which has motivated the conduction of studies to understand this effect. In this way, research was done to analyze this phenomenon and possible benefits.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): DIEGO LOUBACH DA ROCHA (INStituto FEDeral DE EDUCação, CIêNCia E TECnologia DO ESPíRITO SANTO), Anderson pereira martins (INSTITUTO FEDERAL DE EDUCAÇÃO, CIÊNCIA E TECNOLOGIA DO ESPÍRITO SANTO), cássio santos de carvalho (INSTITUTO FEDERAL DE EDUCAÇÃO, CIÊNCIA E TECNOLOGIA DO ESPÍRITO SANTO), flávio antônio de morais pinto (INSTITUTO FEDERAL DE EDUCAÇÃO, CIÊNCIA E TECNOLOGIA DO ESPÍRITO SANTO), adonias ribeiro franco jr (INSTITUTO FEDERAL DE EDUCAÇÃO, CIÊNCIA E TECNOLOGIA DO ESPÍRITO SANTO)
Abstract:
High-chromium cast irons (HCCIs) are widely applied in mining industry as components of equipment for iron ore transportation, where such materials are subjected to severe erosive-abrasive wear conditions. The present work evaluated the erosion-abrasion behavior of an HCCI containing different proportions of austenite and martensite, using an impeller tumbler tribometer (ITT) and iron ore pellets as abrasive material. It was found a good relationship between the destabilization temperature, matrix hardness and wear resistance. The results showed that the wear dominant mechanism on the worn surface of the as-received material was erosion. The results also showed that destabilizations conducted between 930 and 990 ºC led to the development of a matrix microstructure consisting mainly of martensite and finely dispersed secondary carbides, which after wear tests presented craters and small and shallow grooves, characterizing simultaneous action of abrasion and erosion. On the other hand, destabilizations at 1050 ºC allowed to obtain a matrix consisting mostly of austenite and coalesced secondary carbides, which makes it more easily grooved and with higher wear coefficients.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): gabriel onofre do nascimento (instituto militar de engenharia), Thaissa Sampaio Nunes (INSTITUTO MILITAR DE ENGENHARIA), Laís Couto dos Santos (INSTITUTO MILITAR DE ENGENHARIA), Flávia Tereza dos Santos Fernandes Tolomelli (Companhia siderúrgica nacional), Luciano Pessanha Moreira (universidade federal fluminense), Andersan dos Santos Paula (INSTITUTO MILITAR DE ENGENHARIA)
Abstract:
In this work, a low carbon and low-alloy steel supplied in the cold-rolled condition was exposed to different soaking temperatures in the intercritical field, during the annealing process in Muffle furnace, simulating the continuous annealing, and subjected to subsequent cooling in brine in order to observe the ferrite recrystallization and the temperability of the austenite formed on soaking as a function of its fraction. The microstructural evolution was evaluated with support of optical microscopy and scanning electron microscopy results. It was observed that the martensite-austenite (MA) constituent had its fraction increased up to 800 ° C, and above this soaking temperature, the austenite hardenability decreased considerably as a function of the decrease in alloying elements in its solid solution and the increase of its fraction formed and the majority bainite formation in the subsequent cooling in brine.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): hARISTON RUBENS pITA DOS SANTOS SILVA (UEZO), MAURICIO DOS SANTOS VASCONCELOS (UEZO), FRANCIELLY MOURA DE SOUZA (IME), GIsEL CHENARD DIAZ (UFRJ), MONICA COSTA REZENDE (UEZO), NEYDA DE LA CARIDAD OM TAPANES (UEZO), WILMA CLEMENTE DE LIMA PINTO (UEZO), ANA ISABEL DE CARVALHO SANTANA (UEZO)
Abstract:
Structural steels are ferrous alloys widely used because of their good weldability, mechanical strength and low cost. Operating or application conditions involving heat input may promote changes in the microstructure of these materials. This work evaluated the effect of tempering and tempering on the microstructure and properties of A36 structural steel. It was observed that the heat treatment of tempera followed by tempering promoted the formation of microstructure compatible with bainite and acicular ferrite. Samples with this microstructural profile showed a shift of the potential to nobler values (more anodic) compared to the sample as received. These results suggest that the heat treatment influences both the mechanical properties and the chemical resistance of the steel.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): ISADORA PEREIRA NUNES (UFOP UNIV FED. DE OURO PRETO -), Geraldo lúcio de faria (UFOP UNIV FED. DE OURO PRETO), josé carlos de lacerda (unifei univ. fed. de itajubá ), leonardo barbosa godefroid (UFOP UNIV FED. DE OURO PRETO)
Abstract:
UNS S41003 (410D) steel is a non-stabilized ferritic stainless steel with relatively low chromium content. It has superior mechanical and corrosion resistance than low carbon steels. For this reason, and because of its relatively low cost in special steels, it is a strong candidate for replacement of common carbon steels in a variety of applications. In addition to satisfactory chemical properties, it is important to ensure good performance in relation to its mechanical strength to stipulate new applications of this steel, thus, the development of hardening mechanisms without significant loss of ductility is desirable. In this context, this work evaluated the influence of quenching with intercritical austenitization on the microstructure and mechanical properties of 410D ferritic stainless steel. Heat treatments of quenching were carried out by varying the temperature and the time of austenitization in order to obtain biphasic microstructures (ferrite and martensite). The results showed that the increase of the temperature and the time of austenitization favors the increase of the martensite fraction in the microstructure and the higher the martensite fraction, the higher the hardness and the tensile strength. The best balance between mechanical strength gain, without significant loss of ductility was presented by steel containing 57% martensite.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): joao vitor da silva pinto (universidade federal do ceara)
Abstract:
The microstructural analysis in materials appears as the main technique in the microstructural characterization. The microstructure brings information about the analyzed material, as mechanical properties and corrosion resistance. For act through changes in the structure of the materials, the heat treatments require metallographic techniques to analyze the results. Among these techniques, optical microscopy is one of the most efficient for this purpose. The results of treatments of annealing, quenching (with different cooling media) and tempering performed at 750 ° C (within the critical zone) in an AISI 4340 steel using optical microscopy and hardness test will be evaluated in this paper.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): LUIZ GUSTAVO LOPES GUADANINI (Autônomo), Getúlio Fonseca dos Santos (ibar), Letícia Barbosa Silva (ArcelorMittal), Roney eduardo lino (arcelormittal)
Abstract:
The effect of post-deformation aging on low carbon steels and how it has often been studied in the metallurgical industry, since the phenomenon has a direct influence on material’s mechanical properties. Niobium is a microalloying element widely used in steels because of its influence on grain size and the formation of precipitates that increase mechanical strength, but few studies are being done to address the relationship between this element and the aging. The evolution of the static aging as a function of temperature and time was studied in low carbon wire rod with and without niobium addition. The steel samples were subjected to a pre-deformation followed by thermal treatments that provided the third stage of aging (250-350 °C) in periods ranging from 1 to 60 min. Both steels showed stabilization in the increase of hardness after 3 min, but the microallowed steel presented greater increase of hardness over time.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): MONICA ALINE MAGALHAES GURGEL (IME - INSTITUTO MILItar De engenharia ), Larissa Fernandes Nunes (IME - INSTITUTO MILITAR DE ENGENHARIA ), Eustáquio de Souza Baêta Júnior (IME - INSTITUTO MILITAR DE ENGENHARIA ), Ramón Alves Botelho (IME - INSTITUTO MILITAR DE ENGENHARIA ), Leonardo Sales Araújo (Universidade federal do rio de janeiro ), Luiz Paulo Mendonça Brandão (IME - INSTITUTO MILITAR DE ENGENHARIA ), Andersan dos Santos Paula (IME - INSTITUTO MILITAR DE ENGENHARIA )
Abstract:
The diverse applications of metallic materials make this area in constant development, being the automobile industry a sector that promotes several challenges for the steel industry. From this research were developed several materials among them steels assisted by the transformation induced plasticity (TRIP) effect. It has recently been observed in steels containing high aluminum the possibility of very interesting characteristics that need a greater understanding. Thus, this work evaluates the influence of quenching heat treatment, with distinct soaking temperatures, on steel with high aluminum content and niobium addition through optical microscopy and X-ray diffraction analysis. From the results obtained, it was verified that the higher the soaking temperature applied in heat treatment higher the martensite formed percentage in the microstructure, indicating that the soaking took place in an intercritical field of austenite and ferrite coexistence and that there is a consumption in the pro-eutectoid ferrite fraction pre-existent that contributes to the alloy elements impoverishment in austenite and a smaller retained austenite fraction associated to the martensite-austenite (MA) constituent.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): raphael luiz moreira (puc-minas), ana paula silva (puc-minas), Ana Elisa Ferreira Marques (puc-minas), felipe holanda (puc-minas)
Abstract:
Aluminum-silicon alloy is widely used due to its mechanical properties and characteristics, including low density, corrosion resistance, high recycling potential and high wear resistance. The great potential that this alloy has in becoming materials with high resistance and lightness has led it to have great utility in the industry. The study focus on the hypereutectic aluminium-silicon alloy and on the mechanical properties that the alloy presents optimally after the cyclic thermal treatment that leads to the semi-solid state. This improvement occurs due to the more uniform distribution of the primary Si, since in the untreated material it has an inhomogeneous distribution. Thermal treatment occurs in cycles of thermal variation with heating and cooling of the material in a controlled manner. Significant changes were observed in the microstructure of the alloy after the heat treatment, such as hardness increase.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): sidmar aparecido ceresani (sidmar.ceresani@paranapanema.com.br)
Abstract:
This work aims to evaluate the conduct of the mechanical properties of the UNS-C26000 and UNS-C28000 brass alloys in cold forming and heat treatment process, using a comparative method through the hardening curves, and the material-based recrystallization kinetics with applications in cutting and bending processes, using different reductions in cold rolling by imposing a total reduction of 65% and by annealing at a temperature of 500 ° C where the Zn rich phase delayed the recrystallization kinetics, while the was determined for the Cu rich phase, after the heat treatment the cooling was slow, in which it plays an important role in the volumetric creation of the α and β phases in the UNS-C28000 alloy. The comparative method was performed by microstructural characterization tests, mechanical hardness and tensile tests. The main mechanical characteristics were determined and their variations discussed based on the changes produced between the α and β phases. The microstructural evolution of the alloys in comparison in the performance of the tests seeking to make feasible the gradual replacement for certain applications using the UNS-C26000 alloy or brass with the α phase
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): VICTOR BARBOSA DE SOUZA (UFF / UENF / UNIREDENTOR), Felipe Ribeiro Velozo (UFF / UENF / UNIREDENTOR), Victor Pereira da Costa (UFF / UENF / UNIREDENTOR), Amanda Camerini Lima (UFF / UENF / UNIREDENTOR), Daniel Passos Gallo (UFF / UENF / UNIREDENTOR)
Abstract:
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): VICTOR BARBOSA DE SOUZA (UFF / UENF / UNIREDENTOR), Marina Teixeira Carvalho (UFF / UENF / UNIREDENTOR), Isabela Guedes Vieira (UFF / UENF / UNIREDENTOR), Amanda Camerini Lima (UFF / UENF / UNIREDENTOR), Daniel Passos Gallo (UFF / UENF / UNIREDENTOR)
Abstract:
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): VICTOR BARBOSA DE SOUZA (UFF / UENF /UNIREDENTOR), Hugo Rezende Souza (UFF / UENF /UNIREDENTOR), Jefferson Campos Desidério (UFF / UENF /UNIREDENTOR), Amanda Camerini Lima (UFF / UENF /UNIREDENTOR), Afonso Rangel Garcez (UFF / UENF /UNIREDENTOR), Niander Aguiar Cerqueira (UFF / UENF /UNIREDENTOR), Daniel Passos Gallo (UFF / UENF /UNIREDENTOR)
Abstract:
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): VICTOR BARBOSA DE SOUZA (UFF / UENF / UNIREDENTOR ), Caio Sergio Friaça Lopes de Araújo (UFF / UENF / UNIREDENTOR ), Alan Almeida Freire (UFF / UENF / UNIREDENTOR ), Niander Aguiar Cerqueira (UFF / UENF / UNIREDENTOR ), Daniel Passos Gallo (UFF / UENF / UNIREDENTOR ), Amanda Camerini Lima (UFF / UENF / UNIREDENTOR )
Abstract:
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): VICTOR BARBOSA DE SOUZA (UFF / UENF / UNIREDENTOR), Bruna Paes Fragoso (UFF / UENF / UNIREDENTOR), Bruno Paes Fragoso (UFF / UENF / UNIREDENTOR), Niander aguiar Cerqueira (UFF / UENF / UNIREDENTOR), Makssuel Davila (UFF / UENF / UNIREDENTOR), Leticia borges de paula (UFF / UENF / UNIREDENTOR), valtency ferreira guimarães (UFF / UENF / UNIREDENTOR)
Abstract:
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): VICTOR BARBOSA DE SOUZA (UFF / UENF / UNIREDENTOR), João Vitor Moreira Pinto (UFF / UENF / UNIREDENTOR), Itamar Brandão Sanguir (UFF / UENF / UNIREDENTOR), Amanda Camerini Lima (UFF / UENF / UNIREDENTOR), Vinicius Lopes Silva (UFF / UENF / UNIREDENTOR), Daniel Passos Gallo (UFF / UENF / UNIREDENTOR), Niander Aguiar Cerqueira (UFF / UENF / UNIREDENTOR)
Abstract:
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): VICTOR BARBOSA DE SOUZA (uff / uenf / uniredentor), Amanda Camerini Lima (UFF / UENF / UNIREDENTOR), Gean Neiva da Silva (UFF / UENF / UNIREDENTOR), João Paulo Vardiero da Silva (UFF / UENF / UNIREDENTOR)
Abstract:
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): VICTOR BARBOSA DE SOUZA (UFF / UENF / UNIREDENTOR), Dayllan ALves CUnha (UFF / UENF / UNIREDENTOR), João Lucas Moreira Tardim (UFF / UENF / UNIREDENTOR), Niander aguiar cerqueira (UFF / UENF / UNIREDENTOR), Afonso Rangel Garcez (UFF / UENF / UNIREDENTOR), Julia de Mello Silva (UFF / UENF / UNIREDENTOR), Amanda camerini lima (UFF / UENF / UNIREDENTOR)
Abstract:
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): YANKA MARIA ARAUJO TORRES (UNIVERSIDADE FEDERAL DO CEARÁ)
Abstract:
SAE 1080 is a steel that after undergoing thermal treatments to achieve the desired mechanical properties can be widely used in the industry. Therefore, the objective of this work is to optimize the time of heat treatment of spheroidization, which is widely used to improve the mechanical properties of high carbon steels, through the refining of the microstructure through a quenching. In this context, during the study, a metroroad rail consisting of 1080 steel supplied by the Laboratory of Research and Technology in Welding (LPTS) was used as a sample. To analyze whether the objective was achieved, a microstructural characterization was performed after the quenching and spheroidization procedures of the sample. In addition, metallographic analyses were performed after thermal treatments in order to identify the morphology of the material and its influence on the hardness by comparing the process based on the results according to what was found in the literature.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): Julio Cezar Pedrosa da Silva (IFG)
Abstract:
Conventional synthetic marble has emerged in a few decades, is made from the blend of a resin and a mineral filler usually the limestone. The purpose of the project is to replace the mineral load by expanded vermiculite, thus producing a new composite. The vermiculite has great application within the civil construction industry. The intention is the creation of a new synthetic stone, improved in its mechanical properties. The creation of a new composite that has greater mechanical resistance than the traditional synthetic marble, in addition to presenting a lower weight, thus has a lighter and more resistant structure. In the process of manufacturing synthetic marble, the pieces are molded in molds constructed of fiberglass and polyester resin, where the prepared compound of unsaturated polyester resin and mineral filler is poured. The CPs analyzed were composed of mineral filler and resin, and at 25% resin at 75% mineral filler. All specimens were assayed by bending test and the mass of all specimens measured
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): Juliana Peixoto Rufino Gazem de Carvalho (UENF)
Abstract:
To qualify a product as suitable for paving, among other properties, a good chemical resistance is required. For this, the objective of this work was to compare the behavior of ceramic pavers, adoquins, industrially produced and pre-molded parts of concrete (PPC) when exposed to chemical products. Two different types of adoquins were used, one with the standard mass used for sale in the local trade and the other with the modified mass, incorporating ornamental rock residue from sawmills. The PPC was obtained commercially and tested without modification. The results showed a lower water absorption of the concrete product, however, in relation to the chemical resistance, the ceramic floors possess indisputably superior characteristics.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): magno torres carvalho (instituto militar de engenharia)
Abstract:
The present study had proposed to investigate the sintering process product with a Brazilian-made αlfa-SiC with a mixture of the biphasic Al2O3-YAG composite as additive. The additive was used in concentration of 10wt%. The mixtures were milled, deagglomerated, sieved and uniaxially and isostatically pressed under 30 and 200 MPa. Sintering reactions were carried out at 1800 e 1900 ºC, for 30 min, in argon atmosphere. The SiC sintered with the additive within this study were characterized by X-ray diffraction with phase quantification by Rietveld method. The samples show high densities, above 93%, and low superficial porosity, around 2.67%. The results of shrinkage and weight loss presented great values, such as 48.45% and 12.12%, respectively. These factors indicate that the results are quite promising compared within references found in the literature, showing the biphasic composite as a stable additive material, confirmed by phase quantification.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): Márcio jardim de oliveira (Instituto federal do Rio de janeiro), Alaelson Vieira Gomes (Instituto Militar de Engenharia), Édio Pereira Lima Júnior (INSTITUTO MILITAR DE ENGENHARIA), André Ben-Hur da Silva (INSTITUTO MILITAR DE ENGENHARIA), Flavio James Humberto Tommasini Vieira Ramos (INSTITUTO MILITAR DE ENGENHARIA), André Rocha Pimenta (INSTITUTO FEDERAL DO RIO DE JANEIRO)
Abstract:
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): VICTOR BARBOSA DE SOUZA (UFF / UENF / UNIREDENTOR ), Aloisio Costa Vieira Junior (UFF / UENF / UNIREDENTOR ), Paula Souza Ferreira (UFF / UENF / UNIREDENTOR ), Thais do Nascimento Oliveira (UFF / UENF / UNIREDENTOR ), Amanda Camerini Lima (UFF / UENF / UNIREDENTOR ), Vivianne Rosestolato Daruich Pereira Tannus (UFF / UENF / UNIREDENTOR )
Abstract:
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): Edwillson Gonçalves de (UFPA), Jean da Silva Rodrigues (IFPA), César Tadeu Nasser Medeiros Branco (UFPA), Fábio Santos de Sousa (UFPA), Roberto Tetsuo Fujiyama (UFPA), Alisson Clay Rios da Silva (UFPA), Veronica Scarpini Candido (UFPA), Sérgio Neves Monteiro (IME-RJ)
Abstract:
Present an ordered study of the fractographic aspects of samples prepared for interfacial mechanical adhesion assays, composed of therapephalic polyester resin reinforced with palm entrapment fiber. The fracture surfaces indicated failure mechanisms of the samples after static mechanical stress shear stress at room temperature. These fracture surfaces were obtained from the fragmentation and filament extraction tests and analyzed in the Scanning Electron Microscope (SEM). Thus, the main fractographic aspects revealed are identified, documented and discussed in this work. At the first moment, superficial fracture analyzes of samples submitted to the fragmentation tests were done. The microscopic analysis was necessary to know the reasons for the failure voltages to be accused in the strain / strain graphs. In the second moment, fracture surfaces of the interface reinforcement / matrix of samples were analyzed where friction reinforcement / matrix (partial pull out) and pullout of the filament embedded in the polymer matrix (pull out total) occurred. These analyzes were important because we can conclude with more accuracy, through the images, the reasons for the results of the interface properties of the material. The fractographic study was efficient, giving us indications of the procedures to be adopted in the processing of the composites for the improvement of the mechanical properties.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): iris sterfanie santos (ufs), Romário de Jesus Santos (Universidade Federal de Sergipe), Elisnan Alves dos Santos (Universidade Federal de Sergipe), Mariana Pires Maria (Universidade Federal de Sergipe), Vitor Alysson Menezes Pinto (Universidade Federal de Sergipe), Lana Laís Pereira da Cruz (Universidade Federal de Sergipe)
Abstract:
Concern about the environment, scarcity of natural resources and irregular waste disposal are trivial events on the world stage. Thus, civil construction as a field of research and innovation seeks the use of alternatives for the insertion of materials with freedom of expression, with its addition to its composition, confers to the improvement in mechanical properties. The addition of recycled polymer fibers from whiteboard markers is a variant that aggregates improvement in the constructive process, cost reduction, and reduced impact to the environment. In this way, concrete specimens with and without recycled fiber of laboratory markers were molded with different water / cement factors with the intuition of comparing mechanical properties. The results indicate an increase in the compressive strength with the use of recycled fibers and a significant reduction of cracks in the concrete surface, considering the water / cement factor used, because it interfered in the cement matrix bond and fiber when the water content was higher high.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): Janine Feitosa de Deus (Universidade Estadual do Norte Fluminense), Rubén Jesus Sanchez Rodriguez (Universidade Estadual do Norte Fluminense), Sérgio Neves Monteiro (Instituto militar de engenharia)
Abstract:
Environmentally correct composites, made from natural lignocellulosic fibers (FNL), are among the most researched and applied today. Among the FNLs, we highlight the Rami fibers (Boehmeria nivea), which arise as an alternative to synthetic fiber fabrics in multilayer armor systems, for use in ballistic protection vests, because they are lightweight, low cost and environmentally correct. In the present work, the mechanical behavior of epoxy matrix laminated composites reinforced with ramie fabric was investigated through tensile tests, under different curing conditions. Laminated composites were fabricated in a metal mold under vacuum conditions. The fractured specimens were analyzed in SEM and the results were evaluated aiming at some tensile properties with the incorporation of ramie fabric, aiming at their subsequent application in ballistic armor.
Plenary
10/3/19, 10:15 AM - 10/3/19, 11:05 AM
Presenter(s): Luana Cristyne da cruz demosthenes (IME)
Abstract:
The ballistic vests produced today are composed of synthetic fibers and the search for the replacement of these materials by natural fibers has increased in the last decades. As a result, the present research had as objective to perform ballistic tests in composite plates of epoxy matrix reinforced with sisal fiber, being made 3 different configurations of structure, all with 40% volume of sisal fiber. The ballistic tests were carried out using .22 mm caliber lead ammunition fired through a specimen at a distance of 5 m from the target. The measurements of the test were made considering the initial and final masses of the composite plates in order to estimate the residual velocity of the projectile after the ballistic impact. The results indicated that the plates could be used as potential devices for low energy ballistic protection. Mainly the composite condition reinforced with fabric that was able to retain the projectile.
Closing
10/3/19, 10:45 AM - 10/3/19, 11:00 AM
Presenter(s): Carlos Sartori, Application Engineering Specialist
Abstract:
Plenary
10/3/19, 11:05 AM - 10/3/19, 11:30 AM
Presenter(s): beatriz fausta gandra (usiminas)
Abstract:
The fuel with small particle size, known as small, can be charged with the metallic burden, replacing the coke, to improve the gas permeability conditions and the iron ore reduction efficiency in the blast furnace. At Usiminas, the balance between generation and consumption of this material limits its use at rates below the national average. Therefore, it was evaluated the effect of pet coke to replace small coke in fuel consumption and blast furnace operational stability. The industrial test results indicated the possibility of replacement up to 45 kg/t hot metal, with fuel rate maintenance, burden permeability and blast furnace productivity.
Plenary
10/3/19, 11:05 AM - 10/3/19, 11:30 AM
Presenter(s): PAULO SERGIO SOARES SANTIAGO (SANTIAGO CONSULTING), LARRY J ASPINALL (KNEW VALUE)
Abstract:
Properly monitoring of the water quality in cooling systems is critical to ensure a good conditioning of its key performance indicators: corrosion, fouling, deposit formation and microbiological activity. By this way the operating units can achieve their goals with respect to their respective process key performance indices. While the reliability of this monitoring process in anticipating problems assumes high importance, the methods used to date in the industry have not actually provided realistic results due to the lack of actual heat transfer. Knew Value has developed and patented a new technology, the Sentinel, which enables innovative monitoring methods to be applied online, enabling simulations at critical conditions of water flow velocity and skin temperature, and achieving excellence in monitoring key performance indicators of the chemical treatment applied in cooling systems. The objective of this paper is to present this technology and cases histories of performance.
Plenary
10/3/19, 11:05 AM - 10/3/19, 11:30 AM
Presenter(s): sérgio roberto lopes moreira (usiminas)
Abstract:
The inclusions level present in molten steel interferes directly in the slabs produced by continuous casting and are determinant in surface defects formation in cold rolled products. The steel reoxidation, as well as the slag carried from the tundish to the mold, the interaction of the steel with tundish covering powder and mold flux powder, have a strong influence on the slabs cleanliness originated in solidification process in the mold. In the present work, the inclusions formed during the beginning of the continuous casting process for ultra low carbon steels were evaluated, under three different conditions of addition from tundish powder covering, besides the standard condition itself. The study’s objective is to reduce the inclusions, and consequently, superficial defect in initial slabs and, it will be possible to identify them by means of the relation of the oxygen content in the continuous casting machine strand. Such research was intended to provide information for changes in the process conditions to improve the quality of the final product.
Plenary
10/3/19, 11:05 AM - 10/3/19, 11:30 AM
Presenter(s): BRUNA HELENA MALOVINI LOIOLA (redemat / ufop), Henrique Silva Furtado (Arcelormittal), Johne Jesus Mol Peixoto (escola de minas - ufop), Itavahn Alves da Silva (ESCOLA DE MINAS - UFOP), Carlos Antônio da Silva (Escola de minas - ufop/redemat)
Abstract:
Slopping occurs when the emulsion inside the BOF (Basic Oxygen Furnace) increases its volume and portion of the slag is expelled. This phenomenon brings some concerns for steelmaking such as reduction of refining efficiency, material losses, health concerns and also environmental issues. Big Data files from ArcelorMittal Tubarão have been analysed in order to identify the main causes of the slopping. Statistical techniques such as multivariate analyzes, which are not very usual in the steelmaking field, have been employed for such. Statistica, Genes and Rbio softwares were used and principal components, path analysis, and correlation network were the chosen tools. It was possible to verify, for example, that the weight of mixed briquette added during the blowing and the content of silicon in the hot metal are among the causes of slopping.
Plenary
10/3/19, 11:05 AM - 10/3/19, 11:30 AM
Presenter(s): Lays Augusta Leal Carvalho (universidade federal de ouro preto), ALEX MILTON ALBERGARIA CAMPOS (UNIVERSIDADE FEDERAL DE OURO PRETO), paulo santos assis (universidade federal de ouro preto)
Abstract:
The present research is dedicated to analyzing the addition of sawdust biomass, which is a carbonaceous raw material that can be used in coal blends for the production of metallurgical coke, preserving the required quality, with lower cost. The quality of metallurgical coke can be determined by the efficiency of its chemical, physical and thermal functions inside the blast furnace. For the production of hot metal, any modification in the constituents of the raw materials can have a direct influence on the blast furnace productivity and in the final quality of steel. From the thermal degradation analyzes such as coke reactivity index (CRI) and coke strength reaction (CSR), cold resistance (DI) and immediate analyzes, it can be define the quality of metallurgical coke produced with biomass aiming to relate the parameters that interfere in the particularities of the material in its categories not blast furnace. Some results shows that is possible to use 2% of eucalyptus sawdust in the coal mixture
Plenary
10/3/19, 11:05 AM - 10/3/19, 11:30 AM
Presenter(s): Julio Cezar Pedrosa da Silva (IFG)
Abstract:
Composite materials that gain more and more space and production area, therefore, there are many materials that represent strength and weight lower when compared to materials in the industry.This work describes the study of the mechanical properties of glass fiber and carbon fiber reinforced polymer composites. The specimens were fabricated and tested according to ASTM D3039 and their properties evaluated and compared between different reinforcing materials. Test specimens manufactured on the basis of the standard of 24.902Mpa and a standard deviation of 4.094Mpa in the tensile strength values. The CPs were manufactured with reinforcement to the degree of increase in the property, being those of fiberglass with a mean of 39,356 Mpa and a standard deviation of 3,974 Mpa, already having been found of 52,437 Mpa and a standard deviation of 9,406 Mpa
Plenary
10/3/19, 11:05 AM - 10/3/19, 11:30 AM
Presenter(s): anderson denadai thomazini (VALE), Eduardo Poltronieri Trés (VALE), Leandro Seixas Bicalho (Clariant), Pedro Martins de Almeida Rollo (Clariant), Raphael Alcantara da Costa (Clariant), Vinícius Domenis Isaka (Clariant)
Abstract:
Usual pelletizing process requires the use of iron ore within a given range of particle size. The pelletizing plants often have comminution circuits composed of ball mills and roller presses to meet the granulometric parameters. Aiming at the partial removal of grinding operations and elimination of wet ore processing, the present study evaluated the pelletizing of two samples of ore with lower surface area: (1) sample with only one passage into the roller press (specific surface area of 997 cm²/g) and (2) “in natura” sample as fed to the pelletizing plant (specific surface area of 450 cm²/g). These experiments were conducted with the use of bentonite and the products E/PE MIN 070/19 and E/PE MIN 090/19, made available by Clariant for this purpose. The results indicated that conventional bentonite is not efficient for coarse particle agglomeration. On the other hand, the products E/PE MIN 070/19 and E/PE MIN 090/19 achieved good performance. Considering a sample with only one passage into the roller press it was possible to form pellets similar to those produced in the conventional process.
Plenary
10/3/19, 11:05 AM - 10/3/19, 11:30 AM
Presenter(s): leandro augusto viana teixeira (Vale s.a.), adauto caldara (vale s.a.), Márcio Francisco Dill Junges (vale s.a.)
Abstract:
Innovation in the mining industry is critical when facing ever growing challenges, like the need to increase safety, reduce social and environmental impact, deal with commodities price fluctuations among others. However, successful innovation is not only the product of technological innovation, but it is also dependent on Innovation Management, which consists of changing the way a company fosters innovation, creating a new structure able to leverage technology knowledge and the ability to convert this knowledge in value. This paper presents a restructure option for innovation that focus on R&D development linked to business needs and company strategy. This new system was approached based on four fundamental blocks for innovation management (Approach, Organization, Resources and Metrics), showing how the technology master plan and a management tool are able to bring together all aspects necessary for the proper operation of the system. The new system confirmed the importance of having the initiatives organized as innovation roadmaps, connecting techno-scientific development with the company needs through the use of KPIs that are relevant to the business
Plenary
10/3/19, 11:05 AM - 10/3/19, 11:30 AM
Presenter(s): Marcelo Koiti FUGIHARA (BELGE ENGENHARIA E SISTEMAS), Fabio Heiji Yamada (BELGE ENGENHARIA E SISTEMAS), Ruano Fonseca Araujo (BELGE ENGENHARIA E SISTEMAS)
Abstract:
Conception the simulation and optimization technologies for industrial processes applied in the mining environment: tools and methodologies. Clarifications provided about the differences of these techniques when compared with static analysis (intuition, use of static spreadsheets, etc.). Presentation of practical cases at several big mining companies in Brazil. These projects will be presented and illustrated through dynamic simulation models developed at those companies, each one with its set of objectives, scope and results (for example: sizing the number of equipment, silo, piles related to the mining processing, logistics, ROM transportation, mine operations plan, etc.).
Plenary
10/3/19, 11:05 AM - 10/3/19, 11:30 AM
Presenter(s): Carlos Alberto Chaves (UFF), wainer da silveira e silva (Universidade Federal Fluminense), robisom damasceno calado (Universidade Federal Fluminense)
Abstract:
The concern with the issue of the adequate treatment of industrial waste arose with the concept of sustainable development. The Rome Club alert has greatly contributed to the more rational use of natural resources over the past 50 years. The concern with responsible production and the judicious use of natural resources has given priority to the recycling of materials for companies' business agenda. The secondary production of metals from the recycling of scrap and waste from industrial processing has always been a routine practice in the industry, and is currently a highly relevant activity, vital for the economic and environmental sustainability of the business. This work deals with the technical, economic and environmental aspects of the recycling of zinc - containing waste through a case study of recycling of waste generated in the steelmaking process in Electric Arc Furnace, known as electric steel powder (EAFD). The industry is still looking for technologies to reduce the generation and recycling of such industrial waste. The relevance of the study is the use of the Analytic Hierarquic Process (AHP) method to evaluate and select the best alternative, among several available, for treatment and recycling of EAFD. A typical problem faced by the industry, which often adopts palliative solutions, postponing the definitive solution to the waste problem. As a result, the efficacy of the methodology in the zinc - containing waste recycling project implemented by Votorantim in Juiz de Fora, State of Minas Gerais, was demonstrated.
Plenary
10/3/19, 11:05 AM - 10/3/19, 11:30 AM
Presenter(s): Regina (Ufc), Hamilton (Ufc), Stephanie (Ufc), Leticia (Ufc)
Abstract:
The understanding of the relationship between ultra high strength steels mechanical properties and microstructure remains a key problem in metallurgy with important consequences for the industry, notedly the high performance industry such as nuclear, petrochemical and aerospace. These applications require combination of high mechanical strength and good toughness, as well as good weldability, high corrosion resistance, etc. However, many hardening mechanisms result in a dilemma of the antagonism between mechanical strength and toughness, making it indispensable researches for a solution that optimizes the two properties, improving its performance and increasing the range of possibilities of its application. In this work, the effects of the solution annealing temperature on the microstructure, hardness, martensitic transformation and texture of the maraging 300 steels were evaluated. Seven solution annealing temperatures were evaluated for a time of one hour of treatment and three aging temperatures for three hours of treatment. The microstructural characterization was performed by optical microscopy to determine the grain size of the primary austenite and analysis of the microstructure, X-ray diffraction and diffraction of backscattered electrons. The results showed that the solution annealing temperature above the conventional one had little influence on the crystallographic texture of the material. It was also observed that there is a hardness peak at 1000° C and that there is a relationship between the grain size of the previous austenite and the martensite morphology. It is concluded that the grain size of the previous austenite also influences the beginning temperature of the martensitic transformation.
Plenary
10/3/19, 11:05 AM - 10/3/19, 11:30 AM
Presenter(s): LUIZ MAURÍCIO BARRETO DE AZEVEDO (UFRJ)
Abstract:
Superalloy 718 is a precipitation hardened nickel based alloy.This alloy is commonly used for aerospace, oil and gas and nuclear industries due to mantaining the properties almost unaltered from cryogenic temperature to 650°C. Iterative thermomechanical treatments are used to enhance the fraction of Σ3n boundaries and consequently mitigate integranular defects. Therefore, the aim of this investigation is to study and propose a thermomechanical route with cicles of wire drawing strain and annealing heat treatment capable of enhance the fraction of Σ3n boundaries, besides that, to evaluate the influence of wire drawing in the precipitation of the DELTA phase, mesotexture and grain size. For this goal, scanning electron microscopy (MEV) and electron backscattering diffraction (EBSD) were performed for microstructural characterization. Finite elements analisys has been perform to estimate the plastic strain degree and distribution. The results show that, through processing route, was possible to achieve a high fraction of Σ3n boundaries. Nevertheless, the heterogeneity of the wire drawing strain over the transversal section influences in microstructural parameters.
Plenary
10/3/19, 11:05 AM - 10/3/19, 11:30 AM
Presenter(s): giuliano felippe soares (Accenture), ANDRE DIAS LEITE (ACCENTURE), JULIO CESAR DE OLIVEIRA MELO (ACCENTURE)
Abstract:
Troubleshooting in industrial operations is a complex task that needs to be based on data, many times diverse and not structured. This work shows how to use big data to gain insights and move from intuition to a structured approach, contributing to reduce time to detect and resolve issues.
Forum
10/3/19, 11:05 AM - 10/3/19, 11:55 AM
Presenter(s): Francesco Yuri Perra- company manager at Logistics Reply do Brasil
Abstract:
Plenary
10/3/19, 11:30 AM - 10/3/19, 11:55 AM
Presenter(s): ISMAEL VEMDRAME FLORES (UFMG), Otávio Henrique matos de assis (UFMG), Maurício COvcevich bagatini (UFMG)
Abstract:
Softening and melting experiments are commonly used to access the high-temperature properties of iron-burden materials. However, details regarding the reduction behavior in such experiments are usually not provided. The present study had the objective to characterize the softening and melting properties of different iron-burden materials with an especial focus each burden reduction behavior. For that, softening and melting experiments were carried out for samples of iron ore, pellets, and sinters. The high-temperature properties of the materials were compared among each other and their reduction behaviors were evaluated from the continuous outgas analysis, which allowed the delimitation of three main reduction regions. Overall, the degree of reduction (DR) and reduction rates (RR) were bigger for higher basicity materials. At the region of reduction retardation, the acid pellet and the sinters showed sharp declines in RR in comparison to others. The beginning of the retardation regions showed similar contraction levels (20 to 30%) and a wide RD interval (40 to 70%) for the materials tested. In the region where the primary slag was formed, abrupt peaks of reduction and carbon consumption were observed, both more pronounced for materials with lower RD.
Plenary
10/3/19, 11:30 AM - 10/3/19, 11:55 AM
Presenter(s): VITOR VIANNA DE CASTRO MOREIRA (UNIVERSIDADE FEDERAL DE MINAS GERAIS), GABRIEL AUGUSTO DA FONSECA (VALLOUREC SOLUÇÕES TUBULARES DO BRASIL S.A.), DANILSON GONÇALVES DE MELO E SILVA (VALLOUREC SOLUÇÕES TUBULARES DO BRASIL S.A.)
Abstract:
The present work aims to describe the changes made in the operational procedure of the reheating shell furnace, of the hot-rolling of seamless tubes line at Barreiro Plant of VSB, during non-production periods, focusing on reducing natural gas consumption. According to the previous procedure, the furnace was kept at 750°C on these periods, using the main burners. With the new procedure, the furnace is naturally cooled, maintaining only the auxiliary burners with a pilot light turned on, without worrying about the conservation of temperature. Subsequently, the furnace is heated with a rate of 150 ºC/h until it reaches the setpoint temperature of production. This procedure change was successful and didn’t cause operational and security problems. The minimum stoppage time needed for the natural cooling to be economically favorable is 6 hours and 30 minutes. The new procedure reduced the natural gas consumption in 4.500 Nm³, considering 24 hours of stoppage, achieving an estimated annual economy on the thermal energy costs of R$440.000,00 in 2019.
Plenary
10/3/19, 11:30 AM - 10/3/19, 11:55 AM
Presenter(s): FERnando paulucio quinelato (CSN)
Abstract:
In the current steel economic scenario, process optimizations that increase metallic yield are the target of competitive companies. Additionally, the customers’ demand is increasingly for higher quality levels and lower rejection index. In this context, developing works that combines optimization and quality assurance is priority for the business. The focus of this work is on defining the lowest discard from continuous casting start of several application steels with total quality assurance. A specific methodology for the evaluation of the quality of the products slab and hot coil was utilized. Firstly, a quantitative evaluation of nonmetallic inclusion in slabs was conducted and this evaluation allows establishing the minimum length of slab discard necessary to guarantee the slab quality. After that, qualitative analyses of nonmetallic inclusions were conducted also in hot coils to confirm the results from the action of changing the discard tons. The results shown that the produced slabs after the discard defined based on the investigation generated suitable coils for the applications, without any loss of quality.
Plenary
10/3/19, 11:30 AM - 10/3/19, 11:55 AM
Presenter(s): INAMARA AMANDA SOUZA SANTOS (ufmg), Aline Lima da Silva (ufmg), Breno Totti Maia (lumar metals), Vanessa Rodrigues de Medeiros Santos (ufmg), Brenda Caroline Gurgel (ufmg), Luiza Siqueira de Magalhães (ufmg)
Abstract:
The success using the refractory repair/prevention method of LD converters called Slag Splashing is related to the slag physicochemical properties, especially its viscosity. By means a thermodynamic simulation based on the Einstein-Roscoe equation and using a composition slag representative an industrial slag, together with a cold simulation using solutions representing slags with various solid fractions, it was possible to correlate the cold model viscosity to evaluating the possibility transposing the results about this model to the industrial practice in slag with solid fractions up to 20%, and above this value a more assertive model should be reestablished. By cold physical simulation in a 1/10 scale converter model in relation to the 340ton converters from Ternium Brazil, using representative solutions industrial slags with solid fractions to 10 to 40%, the viscosity influence on the intensity slag projection during the Slag Splashing process was evaluated making clear the fluidity effect or high viscosity on the height, location and the projections quality.
Plenary
10/3/19, 11:30 AM - 10/3/19, 11:55 AM
Presenter(s): Diego Canez Fernandes (Usiminas), Henriquison Bottrel Reis (Usiminas), Mauricio Covcevich Bagatini (UFMG - Universidade federal de minas gerais)
Abstract:
The techniques that increase the bulk density of coal become possible the increase of coking plant productivity and, in addition, allow the use of poor caking coals. The increase in bulk density improves the coke strength, which contributes to the decrease of coke rate in the blast furnace. An alternative to increase the bulk density is the addition of oil in the coal, which reduces the surface tension of the water, allowing a greater approximation between the particles and favoring the effective contact during the plastic phase. In this context, the present study has the objective to show the addition of oil effect on the bulk density, varying the coal particle size and moisture. Bulk density tests were performed at three levels of moisture and particle size (<2.83 mm). Afterwards, cokes were produced on a pilot coke oven and were evaluated for its quality (DI 15/150, CSR and CRI). The results showed that the gradual oil addition promoted an increase on bulk density while rising coal moisture and reducing particle size caused its decrease. The coke strength (DI and CSR) was improved with the bulk density increase, showing the feasibility of this technique
Plenary
10/3/19, 11:30 AM - 10/3/19, 11:55 AM
Presenter(s): Juliana Peixoto Rufino Gazem de Carvalho (UENF)
Abstract:
Piassava fibers are used to make brooms and a large amount of waste is generated daily due to the cut to suit the dimensions of the final product. Therefore, this underutilized material presents itself as a potential raw material for the creation of composite materials, mainly for use in civil construction. Therefore, this work aims to characterize the piassava fiber obtained as waste from a broom factory located in the city of Campos dos Goytacazes-RJ. For the study, the collected residue was characterized using a profile projector and, afterwards, the tensile strength test was carried out aiming the knowledge of its maximum tension and modulus of elasticity. The results showed that the fiber has low density and good tensile strength.
Plenary
10/3/19, 11:30 AM - 10/3/19, 11:55 AM
Presenter(s): Érica Simões Rodrigues (arcelor mittal/ifes), Ramiro Da Conceição do Nascimento Júnior (ifes), Marcos Tadeu D'Azeredo Orlando (Ufes), João Batista Ribeiro Martins (Arcelor Mittal/Ifes), Heidy de Oliveira Simões (Arcelor Mittal), Mariane Gonçalves de Miranda (Arcelor Mittal/Ufes)
Abstract:
In order to guarantee the quality of the sinter and process control some measurements are made such as RDI and FeO (Fe2+). However, the behavior of sinter during reduction in the blast furnace is not always understood, when it is analyzed only metallurgical, physical and chemical quality. Therefore, it is necessary to find alternative techniques to understand more this behavior. In this work four experimental trials were performed to obtain sinter samples with different FeO (Fe2+) contents. Optical microscopy was performed to identify and quantify the phases in sinter and to evaluate the magnetic behavior of each one, the Magnetic Susceptibility technique was used. The results obtained between Optical Microscopy, Magnetic Susceptibility and quality parameters were compared and then was identified that Magnetic Susceptibility may be an alternative to help the understanding of sinter behavior in Blast Furnace.
Plenary
10/3/19, 11:30 AM - 10/3/19, 11:55 AM
Presenter(s): KLEBER MENEZES REIS (GERDAU ACOMINAS SA), Andreize Raphaela costa (GERDAU ACOMINAS SA), matheus Felipe Azevedo lima (GERDAU ACOMINAS SA), thiago santos guedes (GERDAU ACOMINAS SA), Eduardo Donizete da silva (GERDAU ACOMINAS SA)
Abstract:
In this article the evaluation of the effects caused by the presence of manganese in the slime thickening process of the Mineral Treatment Unit II (UTM II - Gerdau Aços Brasil) is presented. From a factorial design, conditions were defined for continuous thickening tests in the laboratory using slime with 2.72%, 5.64%, 8.41% and 14.8% of manganese, obtaining a solid content in the underflow equals to 30%, 29%, 28% and 10% P/P respectively, with an optimized flocculant consumption of 55g/t, 60g/t, 70g/t and 110g/t. The tests showed that the increase in the manganese concentration is directly related to the characteristics of the formed flakes, which presented high hydration, high volume and a strong influence on the time needed to reach the system regime. The behavior analysis of the sedimentation zones during the tests served to show that in relation to the industrial thickener, slime with manganese contents above 5% significantly increase the sensitivity of the system causing low performance.
Plenary
10/3/19, 11:30 AM - 10/3/19, 11:55 AM
Presenter(s): Felipe paiva alves de souza mendonca (gerdau s.a.), kleber menezes reis (gerdau s.a.), THIAGO SANTOS GUEDES (GERDAU S.A.)
Abstract:
This paper presents the development of a permeabilimeter for the measurement of the permeability coefficient in water for different samples, in order to give subsidies to the filtration results and to increase the understanding of the water percolation through porous beds phenomena. Using the methodology of permeability by constant and variable load, 6 samples of different granulometries were tested. With the equations developed by Chapuis and Légraré, the permeability values of the beds formed by the tested samples were estimated from the measured specific surface area, presenting values close to those obtained in the permeability tests. The accuracy of the specific surface value estimation according to the Chapuis-Légraré methodology was also tested, presenting an average error of 5.6% when compared to the measured values.
Plenary
10/3/19, 11:30 AM - 10/3/19, 11:55 AM
Presenter(s): Juliano dalla Rosa (ARCELORMITTAL - ITATIAIUCU), Paulo Henrique da Costa (ARCELORMITTAL - ITATIAIUCU), Christiano Jose ferreira (ARCELORMITTAL - ITATIAIUCU), Kheron E. Soares (ARCELORMITTAL - ITATIAIUCU)
Abstract:
At ArcelorMittal Mineração Brasil, safety is value and its concept is already inserted in the culture of the organization. In addition to training, which is performed regularly, and the programs and procedures already in place, the team of the Occupational Safety sector always seeks to develop new ways to obtain better results, to ensure a risk-free and healthier environment. At present, according to data from the Digital Observatory for Health and Safety at Work, the Public Labor Ministry (MPT) and the International Labor Organization (ILO), at least 653 people lost their lives in 2018. considered as notifications made up to April, the most common cases being cuts, lacerations, fractures, bruises, crushing and amputations. Focusing on not participating in these statistics, ArcelorMittal Mineração Brasil's Occupational Health Health Team (TSS), as in any other organization, has several indicators that help guide other teams regarding the main causes of accidents, the main places with unsafe conditions and with unsafe practices. However, some of these indicators were compromised by being controlled purely by spreadsheets, and because of the large volume of data entry, it was vulnerable to errors such as incorrect, divergent or typing entries. The intention was to ensure the availability of information, knowledge of the problem, speed and assertiveness so that decision making and risk management were the best possible. All this focused on strengthening the safety culture, in the quest for the reduction / elimination of quantitative time and increase of the qualitative time.
Plenary
10/3/19, 11:30 AM - 10/3/19, 11:55 AM
Presenter(s): FRANCISLAYNNE LAGES DIAS (UNIVERSIDADE FEDERAL DE MINAS GERAIS), GUILHERME CARDEAL STUMPF (UNIVERSIDADE FEDERAL DE MINAS GERAIS), Dagoberto Brandão Santos (UNIVERSIDADE FEDERAL DE MINAS GERAIS)
Abstract:
The variations occurred after homogenization, cold rolling and annealing were observed in a duplex stainless steel (DSS) 2205 through the microstructure, texture and microhardness. The sample as received was homogenized at 1100°C for 15 min, cold-rolled with 80% thickness reduction and annealed at temperatures of 900, 1000 and 1100°C for 180 s. After cold rolling, evidence of strain induced martensite was observed. The recrystallization mechanism of ferritic grains is a combination of the nucleation and growth-oriented theories. The texture of the austenite evolves similarly to austenitic stainless steels when subjected to cold rolling and annealing. Annealing at 900°C precipitates sigma phase. For the other annealing temperatures there are no deleterious phases formation. The Lamellae thickness does not show significant influence on hardness of DSS, but cold rolling and sigma phase precipitation increase the mechanical strength.
Plenary
10/3/19, 11:30 AM - 10/3/19, 11:55 AM
Presenter(s): Miguel Ângelo Menezes (UNESP - Universidade Estadual paulista "Júlio de mesquita Filho" - Faculdade de Engenharia -Campus de Ilha Solteira)
Abstract:
Present work makes possible the understanding and the analysis of hot forming process of metals. It is done by experimental validation of the Johnson-Cook model to describe the behavior of materials in the plastic regime, at large deformations, high deformation rates and high temperatures. An understanding of parameters of the model using a simple, fast and reliable analytical numerical method was previously developed by research area in Plastic Forming of Metals at UNESP - Ilha Solteira Campus, obtaining the empirical constants of the model mentioned. This work proposes the experimental validation of the simplified method for determination of empirical parameters of Johnson-Cook’s model, through a heat traction test, considering the mechanical properties of experimentally analyzed materials and material data available in the literature. In general, the experimental results were satisfactory for AISI 1045 steel at temperature of 500 ºC, tested at the strain rate of 1000 s-1, when compared to theoretical results predicted by the model proposed by SCADUTO and MENEZES. In particular, it was possible to show maximum errors of 1,33% for parameter n, 13.15% for parameter B, 295.00% for parameter C and 4.14% for parameter m.
Plenary
10/3/19, 11:30 AM - 10/3/19, 11:55 AM
Presenter(s): SERGIO VALLE JR (ARCELORMITTAL tubarão), LEANDRO RAMOS RODRIGUES (ARCELORMITTAL TUBARÃO), Jorge Emil João da Penha Júnior (Etaure TI & Automação)
Abstract:
This article presents the strategy adopted by ArcelorMittal Tubarão regarding the extraction of weighing data from the loaders automatically. For this, hardware was developed that collects and sends data through 3G / 4G data communication to the Microsoft cloud environment through the Microsoft Azure IoT Hub product, after which the data is sent to the scales system ArcelorMittal Tubarão. The implementation of the solution led to a reduction of 17% in the contractor's resource time and 9% of the time of the own resource, besides increasing the reliability of the consolidation process of the weighing data of the wheel loaders
Round Table
10/3/19, 11:55 AM - 10/3/19, 12:10 PM
Presenter(s):
Abstract:
Plenary
10/3/19, 11:55 AM - 10/3/19, 12:15 PM
Presenter(s): FÁBIO JOSÉ AFONSO (USIMINAS), LUCAS LIMA MESQUITA (USIMINAS), JOSE LUIS LLANOS (USIMINAS), THIAGO MARTINS RODRIGUES (USIMINAS)
Abstract:
In the face of globalization, the universe of leadership has been increasingly provocative. In the age of significant change, having leaders to lead projects effectively presents a huge challenge. Having people with appropriate profile and skills is essential for the success of the organization. In this context, this paper aims to address aspects concerning the Leading program implemented at Usiminas. Aimed at the Supervisors aiming at developing a new technical and leadership profile appropriate to Usiminas' current needs, the Leading program has as its main objectives: to increase operational efficiency (to be a technical reference); expand supervisors' ability to influence team delivery by improving productivity and quality (being a reference in leadership); reduce the dependence of their managers on routine management; and mainly reduce accidents caused by administrative failures.
Plenary
10/3/19, 11:55 AM - 10/3/19, 12:20 PM
Presenter(s): lucas gonçalves generoso (Usiminas), Gustavo Serrano dos Santos (Usiminas), Gustavo Alexandre da Costa Manso (Usiminas)
Abstract:
Usiminas’ Blast Furnace 3 started its current campaign in 1999. Designed to last 15 years of operation, it was expected to produce 41Mt of pig iron. In 2008, wear in the refrigeration system began significantly, allowing water leaks and consequent operational disturbances. In order to extend the current campaign to 2021, Usiminas has carried out, among other preservation activities, two staves exchanges, in 2015 and 2018. In this paper, the planning and main procedures related to the blowdown of the furnace for the second stave exchange is approached. It focuses on the operational activities that allowed the reduction of the burden level down to 25.1 meters below the stock line. The success of lowering burden to the tuyeres level and the methodology adopted is outstanding. Finally, the 7 year extension in the campaign will allow a production of 53.5Mthm, surpassing by 12.5Mthm the projected value
Plenary
10/3/19, 11:55 AM - 10/3/19, 12:20 PM
Presenter(s): Ruano Fonseca Araujo (BeLge), Matheus Sousa Reis (Belge Consultoria), Fabio Heiji Yamada (Belge Consultoria), Marcelo Koiti Fugihara (Belge Consultoria)
Abstract:
The progress of aluminum international market requires companies the ability to serve a growing demand and thus an efficient logistic management. This article has the objective of evaluating the vehicle flow in an aluminum processing company through use of dynamic process simulation and modeling technology. Therefore, it has the proposition to evaluate resources management (equipment and workers), stock capacity, internal flows and cargo handling in the factory; thus, it can evaluate the needs for new investments in these areas. The analysis involves the actual scenario, as well as the future project demand with the addition of a logistic unit attached to the factory, which will increase product flow in the company. So, this article is related to the subjects: logistics, mathematical modeling of process and productivity improvements.
Plenary
10/3/19, 11:55 AM - 10/3/19, 12:20 PM
Presenter(s): VINICIUS CUNHA ARANDA (TERNIUM BRASIL), BRASIL (TERNIUM BRASIL), DENIJEL BURZIC (PRIMETALS), PAUL PENNERSTORFER (PRIMETALS), lEONARDO MARTINS DEMUNER (TERNIUM BRASIL), FRANZ RAMSTORFER (TERNIUM BRASIL)
Abstract:
For many years, Dynamic Soft Reduction has been regarded as a proper method in improving internal quality of slabs. Even though processes models improved significantly over the past years, the efficiency of Soft Reduction was always limited by the discretization error, which inherently exists if segment rollers cannot be positioned individually. The recently developed SRD segment type allows for an individual roller positioning within the mushy zone by avoiding any discretization deviation from the optimal gap. This paper provides a detailed technological overview of the SRD segments as well as operational results at their very first implementation at Ternium Brazil.
Plenary
10/3/19, 11:55 AM - 10/3/19, 12:20 PM
Presenter(s): RUBIA TEODORO SILVA (TERNIUM BR/UFMG), Aline Lima da Silva (UFMG), Gilvan Nascimento de Souza (tERNIUM BR), Breno Totti Maia (lUMAR METALS), Daniel A.G. de Carvalho (TERNIUM BR)
Abstract:
In order to achieve an efficient Slag Splashing practice, employed for maintenance and repair of LD refractories, slags should present suitable characteristics, with respect to viscosity and solid fraction. In this work, a hybrid methodology was developed, combining defined patterns for slag visual classification, based on a rating criteria, from 1 (low quality) to 3 (high quality), along with thermodynamic simulations carried out on FactSage software for determining phases in the slag, solid fractions as well as effective viscosity. The proposed methodology allows one to identify ideal quadrant for effective viscosity, solid fractions and total iron content, in such a way that high rated slags can be attained, with desired quality for the process. The results show that high quality slags (grade 3), can be obtained under the following conditions: end blow temperature of 1690-1720ºC, effective viscosity from 0.027 to 0.042Pa.s, solids fraction of 13-22% and total iron content from 14 to 17.5%.
Plenary
10/3/19, 11:55 AM - 10/3/19, 12:20 PM
Presenter(s): Diego salmin costa (companhia siderúrgica do pecém), wellington césar (COMPANHIA SIDERÚRGICA DO PECÉM), adriano moreira de sousa (COMPANHIA SIDERÚRGICA DO PECÉM), thiago oliveira pontes (COMPANHIA SIDERÚRGICA DO PECÉM), luiz cláudio costa (COMPANHIA SIDERÚRGICA DO PECÉM)
Abstract:
Facing the agressive conditions, against the refractary structure of a coke oven plant, such as thermal dilatation and contact with abrasives and corrosive agents, surge the necessity of some techniques and tools development that support on coke oven plant preventive maintenance in order to this be able achieve a lifespan close to or over 50 years old of operation. The main objective of this work is evaluate the crack impact on underjet system of a coke oven plant and how the process parameters are influenced by these structure pathologies. From this, use follow-up by air-refrigerated endoscopy mapping all the cracks and gas leakages with aim to apply refractary mass, by imersion method, in order to all the anomalies identified could be eliminated and process return to a level more constant.
Plenary
10/3/19, 11:55 AM - 10/3/19, 12:20 PM
Presenter(s): Edwillson Gonçalves de (UFPA), Roberto Tetsuo Fujiyama (UFPA), Alisson Clay Rios da Silva (UFPA), Veronica Scarpini Candido (UFPA), Sérgio Neves Monteiro (IME-RJ)
Abstract:
The use of natural fibers as reinforcement for polymeric composites replacing synthetic fibers has been growing in the last decades for different industrial sectors because they have unique properties. Thus, the production of composite materials reinforced with vegetable fibers was evaluated in a polymer matrix constituted of terephthalic unsaturated polyester resin. The manufacturing process was the hand lay-up, using a silicone mold, in the presence of jute fibers (Corchorus capsularis Linn) in the form of yarns. The dimensions and frequency distributions of the natural fibers were determined. The mechanical characterization of the composites was studied through tensile tests. The fibers used in the experiment were in the in natura condition and chemically treated. For the verification of the strength and stiffness of the samples, AROTEC universal test machines were used. The tensile test of specimens reinforced with discontinuous fibers and randomly oriented fibers was used, using lengths of 5, 10, 15 mm, for mass fractions varying according to the volumetric capacity of the mold. In addition, a fractographic analysis was performed in the scanning electron microscope (SEM), to analyze in detail the fracture surfaces of the samples tested, in order to understand the fault mechanisms of each material. Very poor interfacial adhesion was observed and did not exhibit an appropriate mass fraction to maximize the mechanical properties thereof. The results were also compared with data found in the literature, correlating with other works with vegetal and synthetic fibers.
Plenary
10/3/19, 11:55 AM - 10/3/19, 12:20 PM
Presenter(s): joão josé dos santos carvalho (arcelormittal tubarão), Leonardo Passos Perdigão (ARCELORMITTAL TUBARÃO), Bruno Pinheiro Silva (ARCELORMITTAL TUBARÃO), Flávio Túlio Busatto (ARCELORMITTAL TUBARÃO), Filipe Mansur (ARCELORMITTAL TUBARÃO), ELISA GRATZ PEREIRA (Instituto Federal do Espírito Santo)
Abstract:
Sinter has high participation in the blast furnaces ferrous burden in ArcelorMittal Tubarão, being therefore of paramount importance the constant control of its physical, chemical and metallurgical qualities, aiming at the fulfillment of the client required quality. With the great challenges faced by market conditions, steelmaking companies seek operational sustainability, aiming at stability and reducing costs. One of the main steps to obtain these results in the Blast Furnaces is the raw materials quality stabilization, in order to guarantee the perfect burden distribution control and a better use of the reductant gas inside the reactor, aiming a lower fuels consumption. It is known that the smaller a ferrous particle is, better its reducibility, since a larger surface area provides greater contact with the reductant agent. Based on this concept, the objective of this work is to quantify the effect of the sinter size produced in ArcelorMittal Tubarão Sinter Plant in its reducibility, and in this way enable the definition of a better sinter particle size distribution aiming at a balance between the permeability effects and gaseous yield in the Blast Furnaces. In addition, the reducibility effects on sinter size reduction were evaluated, where the 5 to 10 mm fraction was analyzed in two sinter samples, the first obtained from the conventional route and the second after crushing of the fraction over 50 mm, in order to simulate the effect of the use of a Secondary Crusher in Sintering.
Plenary
10/3/19, 11:55 AM - 10/3/19, 12:20 PM
Presenter(s): HENRIQUE DIAS GATTI TURRER (Anglo American)
Abstract:
The Minas-Rio industrial complex uses a pipeline with extension of 529 Km to transport the iron ore concentrate to the filtering industrial complex and exporting port. Since project phase, bench lab tests have provided important information for the pumped slurry rheology control. Based in these tests results was possible to verify the effects of slurry stability, rheology controller type and particle size distribution in the regrinded concentrate yield stress and relative viscosity. Controlling some characteristics of pumped slurry, such as particle size distribution, pH and solids concentration guaranteed to achieve the necessary rheology properties for its safe pumping through pipeline and resulted in a performance improvement over the years.
Plenary
10/3/19, 11:55 AM - 10/3/19, 12:20 PM
Presenter(s): (), Walter Mazon (Ferrous Resource), Marcello Rodrigues cruz (Ferrous), leandro Carvalhar maciel (Ferrous), Leandro Seixas Bicalho (Clariant), Pedro de Almeida Rollo (Clariant), Helen Martins (Clariant)
Abstract:
Filtration is the operation of liquid solid separation commonly applied in the mining industry. The use of filtering chemical agents is a technical solution viable for filtering optimization. The present work proposed to evaluate two filtering chemical agents (surfactants) to reduce the final moisture content of iron ore concentrate from Ferrous Resources. The leaf test top feed was done with the FLOTICOR FA 7241 and FLOTICOR FA 16557 products. The foaming profile of the filtrate was also evaluated, once excessive foaming is undesired when using this kind of products. The results showed a reduction in the final moisture of the filter cake. The product FLOTICOR FA 16557 achieved the best results, reducing final cake moisture from 10.4% to 9.8% at the dosagem of 25 g/t, besides presenting a fast kinetics in the foam drainage, presenting itself as a technical alternative for filtration optimization.
Plenary
10/3/19, 11:55 AM - 10/3/19, 12:20 PM
Presenter(s): Lorena braga moura (Instituto federal de educação, ciência e tecnologia do ceará), Mohammad Masoumi (universidade federal do ceará), Francisco Evaristo Uchoa Reis (Universidade Federal Rural do Semi-Árido), Alexander Catunda Carneiro (INSTITUTO FEDERAL DE EDUCAÇÃO, CIÊNCIA E TECNOLOGIA DO CEARÁ), Lucas Sousa Félix (INSTITUTO FEDERAL DE EDUCAÇÃO, CIÊNCIA E TECNOLOGIA DO CEARÁ), Hamilton Ferreira Gomes de Abreu (Universidade federal do ceará)
Abstract:
High Mo content in stainless steels improves the resistance to naphthenic corrosion in equipment used in the processing of heavy crude oil. However, causes the precipitation of intermetallic phases such as Sigma (σ), Chi (χ) and Mu (μ), nitrides (Fe5Mo13N4), carbides [(Cr, Fe, Mo)23C6] or Nb and Ti carbonitrides [Nb(CN) and Ti(CN)]. These precipitations result in embrittlement, decreased corrosion resistance at elevated temperatures, and reduced toughness. Experimental alloys of superferritic stainless steel (25% Cr-X% Mo-Y% Ni) with (X = 5 and 7%) and (Y = 2 and 4%) with additional Ti and Nb were developed. The effect of Mo contents higher than those of the known commercial alloys was studied. The influence of the chemical composition variation on the kinetics precipitation of intermetallic phases and evaluated effects on the microstructural characteristics and mechanical properties were analyzed. The σ phase was formed before the χ phase in the samples treated at 600°C and 700°C. However, at higher temperatures of 800 ° C and 900 ° C, the χ phase precipitated earlier than the σ phase. The formation of Gamma (γ) phase in samples with more Ni occurred by eutectoid reaction (α → σ + γ) in the form of lamellar agglomerates.
Plenary
10/3/19, 11:55 AM - 10/3/19, 12:20 PM
Presenter(s): GERALDO LUCIO DE FARIA (Universidade federal de ouro preto), João Lucas Ribeiro e Fernandes (Universidade federal de ouro preto), Altair Lúcio de Souza (gerdau ouro branco)
Abstract:
The hot coil slump is a recurrent problem in the manufacturing process of medium carbon steel plate. Even with the success of hot rolling procedure, the posterior coil slump can occur, representing operational disorder and manufacturing cost increase. Some authors point that the coil slum phenomenon can occur due to metallurgical, mechanical and geometrical aspects. Preview studies already explored the possible mechanical and geometrical components. However, there are few available experimental data about the metallurgical one, that is, the effect of late austenite decomposition during, or after, the coiling stage. In this context, this paper presents a study about the application of dilatometry technique aiming to evaluate the influence of late phase transformations as a relevant cause of SAE 1050 coil slump. Heating cycles that simulate, with good agreement, some possible plate cooling conditions and isothermal coiling were performed in standardized specimens in a quenching dilatometer. Different combinations of cooling rates and coiling temperatures were evaluated, being possible to suggest that a decrease of the cooling rate, in association with a slight decrease of coiling temperature, can decrease significantly the metallurgical influence in the coil slump occurrences.
Plenary
10/3/19, 11:55 AM - 10/3/19, 12:20 PM
Presenter(s): ENRICO PLAZZOGNA (DANIELI AUTOMATION), Antonello Mestroni (DANIELI AUTOMATION), valeria collini (DANIELI AUTOMATION)
Abstract:
The Danieli Group is deeply involved in the technological improvements stimulated by Industry 4.0 concepts widely applied to the metals industry and process automation. The so-called "Intelligent Mill" is the natural evolution of the company’s consolidated know-how and undisputed leadership in the fields of mini-mill and turnkey plants. Complete and structured data collection is the basis for real-time analysis and process optimization in terms of quality, efficiency and easy maintenance. A centralized repository of information is possible thanks to the strong interconnection between process control system architecture and intelligent sensors, together with dedicated software tools leading to an intuitive approach to data analytics.
Plenary
10/3/19, 12:20 PM - 9/3/19, 12:45 PM
Presenter(s): FILIPE SOARES PONTES (APERAM), aNDRE MENDES CARNEIRO LYRIO (APERAM), Guilherme Ribeiro do Espírito Santo (aperam), José Geraldo da Silveira (aperam), Péricles Guimarães Oliveira Aguiar (aperam), Luiz José Gonçalves (autonomo), Raylander Rocha Pessoa (aperam), Sebastião Moraes Miranda (aperam)
Abstract:
This work aims to present the origin of the hearth project of blast furnace 2 in addition to the planning, implementation and results obtained in the Blast Furnace 2 of Aperam South America after the reform. The research and development work started in 2012 after the first chilling hearth with consequent reduction of bottom hearth temperatures. Several meetings, discussions and seminar on blast furnace were carried out with specialists from various companies. The change of reductor from charcoal to coke for six months served to prove part of the theory built by the reduction team. To finally culminate in the concept behind the BF2 problem and then the new design of the hearth that was proposed and implemented in the reform initiated in December 2017. After its implementation, as theorized by the team, a new range of results and threshold were reached
Plenary
10/3/19, 12:20 PM - 10/3/19, 12:45 PM
Presenter(s): LORENZO BACCHETTI (DANIELI)
Abstract:
Automatic yards with ad-hoc WMS (Warehouse management software), are the key for a modern and efficient warehousing which can face today logistic challenges. WMS boosts the traceability of material while optimizing the storage space. The operations in the yard are safer and logically organized according to algorithms that are specifically adjusted case by case. WMS can easily handle multi-cranes yard avoiding conflicts and increasing accuracy of positioning with decreased number of movements. The synergy of automatic cranes and WMS reduces bottlenecks and speeds up the preparation of deliveries with an overall improvement of warehousing and shipping scheduling.
Plenary
10/3/19, 12:20 PM - 10/3/19, 12:45 PM
Presenter(s): FERnando paulucio quinelato (UFF)
Abstract:
The solidification has a fundamental role in the final properties of the material, since parameters such as temperature, chemical composition and kinetics directly influence the final micro and macrostructure. Solidification of steels in continuous casting occurs through dendritic growth toward the slab core. The growth rate directly interferes with the formation of the micro and macrostructure, as well as the formation of the dendrites. Such effects will influence the final microsegregation and macrosegregation profile. The objective of this work is to evaluate the behavior of the secondary dendritic spacings as a function of the casting temperature and the macrostructure as well to calculate the local cooling rate using an empirical equation. The results showed that for minor superheating the secondary dendritic spacings are smaller. A high correlation between secondary dendritic spacing and position along slab thickness was observed for the superheat range of 22C° to 34°C. It was possible to construct curves, using an empirical equation, which show the behavior of the local cooling rate as a function of the secondary dendritic spacings. The obtained results are important to support future studies and process optimization proposals related to micro and macrosegregation in steel slabs.
Plenary
10/3/19, 12:20 PM - 10/3/19, 12:45 PM
Presenter(s): rafaela pereira batista carvalho (csn)
Abstract:
There are many impurities in the hot metal,one of them is the phosphorus, wich promotes cold brittleness to the steel, a property usually undesirable. Its adequation to acceptable contents occurs in the LD Converter, through bath oxidation and addition of fluxes. The proposed model aims to determine the addition of fluxes dynamically: based on thermodynamics and adjustments with historical data to promote a suitable slag in order to protection of the refractory lining and the dephosphoration. The model is being used at LD Converter of the Companhia Siderúrgica Nacional's Steelworks and has shown excellent results.
Plenary
10/3/19, 12:20 PM - 10/3/19, 12:45 PM
Presenter(s): thiago de oliveira mazzeu (paul wurth do brasil), helênio resende silva júnior (paul wurth do brasil)
Abstract:
The gradual aging of the coke oven batteries is an inevitable fact, being important to monitor the conditions of the ovens and peripheral structures to maximize its useful life. Paul Wurth has developed a methodology of diagnosis that evaluates the conditions of the main elements that comprise the coke oven plants, among them: structure of refractory masonry, metallic structures and components, analysis of thermal control and pressure regimes, set of movable machines (charging car, locomotive / quenching car, pusher machine, coke guide car). Through visual inspections and gathering process data and information about routine adopted by the preservation team of coke oven plants, procedures and recommendations are elaborated aiming the extension of the useful life of the equipment. The Diagnoses are procedures that help Coke plants teams understand at what situation is the equipment and contribute to the best practices adopted in the market for the prolongation of life. They must be repeated frequently in order to update the situation of Coke batteries, check the effect of actions taken by the team of preservation and propose new recommendations.
Plenary
10/3/19, 12:20 PM - 10/3/19, 12:45 PM
Presenter(s): Luana Cristyne da cruz demosthenes (IME), Michelle Souza Oliveira (IME), Fabio da Costa Garcia Filho (IME), Fernanda dos Santos Luz (IME), Sergio Neves Monteiro (IME), Lucio Fabio Cassiano Nascimento (IME)
Abstract:
The increase in crime prompts researchers to seek alternatives to improve equipment for the personal safety of civilians and soldiers, through materials that maintain the efficiency of ballistic protection, however, allow the maintenance of adequate mobility, and have competitive costs with materials used for individual protection. In view of this, the present research aims to evaluate the presence of Lithium Fluoride in the ceramics that makes up a multilayer armor system (MAS). MASs are generally composed of three layers of distinct materials and the first layer consists of a ceramic that tends to absorb about 55% of the energy and to fragment the projectile. Therefore, the ceramic samples of Alumina (Al2O3) and Nióbia (Nb2O5) were produced and compared with the ceramics doped with Lithium Fluoride (LiF). The presence of LiF exhibits better densification and produces a slight change in the morphology of the particles. Furthermore, it has been noted that the presence of LiF in ballistic armor produces a greater indentation when compared to ceramics without the compound. However, however large the indentation, the results were still satisfactory with what is stated in the standard, NIJ 0101.04 ie an indentation of less than 44 millimeters.
Plenary
10/3/19, 12:20 PM - 10/3/19, 12:45 PM
Presenter(s): MATHIEU.DUBE (COREM)
Abstract:
The reduction behavior of iron ore pellets in gas-based DR shaft processes has been studied at COREM since the late 80s. At that time, a new DR characterization test called COREM R180 was developped in collaboration with ArcelorMittal Mines Canada (former Quebec Cartier Mining) and ArcelorMittal Long Products Canada (former ISPAT Sidbec Inc.). This paper describes COREM’s approach to improve its understanding of the relations between iron ore pellet microstructure and pellet quality. The differences between the DR90 and the R180 tests are discussed. The evolution of the microstructure during reduction of both tests is also described. The reduction steps during the two tests are put forward as an important factor impacting the microstructural changes as well as the test results.
Plenary
10/3/19, 12:20 PM - 10/3/19, 12:45 PM
Presenter(s): victor gabriel carvalho meira (csn minereção)
Abstract:
CSN Mineração currently has a production capacity of 30 million tons of iron ore per year, where 1/3 of this production is dry. The transportation of dry ore is carried out by small trucks with a capacity of 33 tons. In order to optimize this process, after analyzing all the procedures, premises were defined to increase the average load carried by the trucks from 33 to 40 tons. For that, a load increase test was carried out with fleet trucks. Concomitant, field trips were also carried out to verify runway conditions, braking conditions, loading profile and impacts on the truck's mechanical systems, whose objective was to determine important variables among the different scenarios proposed to be used in the comparison of the results. Thus, after several adjustments in the whole process of maintenance and operation of the trucks, it was possible to carry out the alteration of the average load transported generating an increase of productivity of the fleet
Plenary
10/3/19, 12:20 PM - 10/3/19, 12:45 PM
Presenter(s): rodrigo aparecido moreno (universidade de são paulo)
Abstract:
The organic compounds present in Bayer liquor come from bauxite due to the decomposition of organic and microbial metabolism and high molecular weight humic substances. In the process of digestion of bauxite with caustic soda occurs the decomposition of this substance into other compounds of lower molecular weight, where about 50% of the carbon remaining in the solution and 10% is converted to oxalate, the rest is incorporated into the residue or converted in carbonate. The presence of these impurities in the Bayer liquor change the physical-chemical property, impacting on the unit operations, and reduces the efficiency of yield and quality. A study of impurities removal using the evaporation and crystallization technique was evaluated, as well as the impact on precipitation productivity and on the properties of the liquor. The technique showed an efficiency of 51% in the removal of oxalate and 43% in the removal of carbonate. There was an increase of 14.2% in the yield. The precipitated impurities were separated by filtration and a treatment with calcium hydroxide was performed for recovery of soda, which showed an efficiency of 92%
Plenary
10/3/19, 12:20 PM - 10/3/19, 12:45 PM
Presenter(s): Juliano dalla Rosa (ARCELORMITTAL - ITATIAIUCU), Christiano José Ferreira (ARCELORMITTAL - ITATIAIUCU), Paulo Henrique da Costa (ARCELORMITTAL - ITATIAIUCU), Kheron Soares (ARCELORMITTAL - ITATIAIUCU)
Abstract:
Nowadays, it is observed that companies have been concerned with the effects and risks that alcohol and drugs can cause to the physical and mental integrity of workers and the people that are around, causing even, drop in productivity, absenteeism, lack of motivation at work and still accidents at work. The Occupational Health and Safety (OSH) team in the exercise of its duty and in order to promote a drug-free work environment, increase safety at work and, above all, protect the environment and the lives of its employees decided to implement the Mina Viva Program - Prevention Program for the Misuse of Alcohol and Other Drugs at ArcelorMittal Mineração Serra Azul, with the fundamental objectives of employee quality of life, prevention of accidents, promotion of an alcohol and drug free environment and increase of safety in the workplace. The company encourages the Mina Viva Program, as part of its social responsibility, to integrate its employees and warn about risks and damages caused by alcohol and other drugs. The Mina Viva Program has been working to raise employee awareness on the basis of the indicators and consequently reduce the positive / reactive tests in the company, thus contributing to a healthy and safe environment.
Plenary
10/3/19, 12:20 PM - 10/3/19, 12:45 PM
Presenter(s): WESLEY PEREIRA DE MIRANDA (Universidade federal do rio de janeiro), Rafaella martins ribeiro (universidade federal do rio de janeiro)
Abstract:
The aim of the project is to analyze the effect of interstitial elements regarding to strain aging in the cold rolling manufacturing process in order to produce rebars. The study was carried out by choosing two coils of steel wire 7 mm diameter SAE 1010 with different chemical composition to produce 5 mm rebars. One of the coils with high concetration of interstitial elements and another one with low concentration. The high interstitials elements chemical composition had the most significant variation on yield strain while the low interstitials elements chemical composition didn’t show significant variation. The quantitative analyse could be a useful tool to characterize the phenomenon
Plenary
10/3/19, 12:20 PM - 10/3/19, 12:45 PM
Presenter(s): Anderson Ayres Bittencourt (Arcelormittal)
Abstract:
One of the major challenges in industrial environments is the continuous monitoring of automation applications. The difficult access to industrial networks and legacy systems, bring great complexity to this task. To solve the problem, the migration of these systems and networks to newer and integrated architectures is essential. And this migration allows the use of tools previously known only in the IT world to support the industrial process bringing clarity and assertiveness in fault analysis, troubleshoot and integrated monitoring of all systems. We will bring in this work a clarification of how the model was implemented in Tubarão and Vega plants and several details about each component chosen with the purpose of providing an end-to-end solution for the monitoring of Level 2 and Level 1 Automation Applications and Assets.
Plenary
10/3/19, 2:00 PM - 10/3/19, 2:25 PM
Presenter(s): victor dias martins (usiminas)
Abstract:
The work presents the recent experience of the replacement of 38 staves contributing in the extension of the operational campaign of the Blast Furnace 3. During 13 days, the original FoFo Staves installed in 1999 were replaced by new cast copper Staves. in addition to reestablish the cooling system to the original conditions, the replacement of the material of the Staves contributes to greater thermal exchange favors the formation inactive load (scaffold) that protects the Staves and the body of the Blast Furnace. This replacement was essential to recover the shell temperature stability and extend the life of the equipment by the end of the campaign. Several aspects of the project will be presented: engineering, methodology, planning, security, technical quality, schedule and others.
Plenary
10/3/19, 2:00 PM - 10/3/19, 2:25 PM
Presenter(s): RODRIGO JORGE DOS SANTOS ARRUDA (SEPETIBA TECON SA), klayton sebastião leopoldino (sepetiba tecon s/a), Sergio da Cunha Motta (SEPETIBA TECON S/A), BRUNO SAMPAIO JANNUZZI (SEPETIBA TECON S/A)
Abstract:
Due to the need to mitigate the risks that our own and contracted employees were exposed during the coil lashing process in the basement of ships and also to reduce the costs of this operation, we concluded that we should change the process to increase the safety of with the elimination of sharps, to reduce the physical effort, with the replacement of equipment and, consequently, to obtain cost reduction and gain in productivity, in the shipment of steel coils, in the basement of ships, in Sepetiba Tecon - Porto of Itaguaí.
Plenary
10/3/19, 2:00 PM - 10/3/19, 2:25 PM
Presenter(s): Claudia Caroline Teixeira Barbieri (ufrgs), hector alejandro picarte fragoso (ufrgs), Juliana Gonçalves Pohlmann (ufrgs), Guilherme Liziero Ruggio da Silva (GERDAU AÇOMINAS), Antônio Cezar Faria Vilela (UFRGS), EDUARDO OSÓRIO (UFRGS)
Abstract:
This work aimed to evaluate the combustibility Brazilian coal blends, from state of Rio Grande do Sul, for injection in blast furnaces. The study was carried out by combustion tests in the PCI rig of the Steelmaking Laboratory of the Federal University of Rio Grande do Sul (LaSid/UFRGS). Coals used were Brazilian coal, imported coals and blends of these employing the imported volatile low as base. The results showed that combustibility measured by burnout was proportional to volatile matter content. It was verified a synergic effect in the blends tested, where the high volatile coal (CC) exerted a greater interaction with low volatile coal (CA) than with Brazilian coal (CB). An addition of 10% CC provided a combustion efficiency in the CA: CC blend above an addition of up to 30% CB in the CA: CB blend. From 30% CC and 50% CB there was no significant variation in combustion efficiencies in relation to individual coals CC and CB.
Plenary
10/3/19, 2:00 PM - 10/3/19, 2:25 PM
Presenter(s): Edwillson Gonçalves de (UFPA), Roberto Tetsuo Fujiyama (UFPA), Alisson Clay Rios da Silva (UFPA), Veronica Scarpini Candido (UFPA), Sérgio Neves Monteiro (IME-RJ)
Abstract:
The use of natural fibers as reinforcement for polymeric composites replacing synthetic fibers has been growing in the last decades for different industrial sectors because they have unique properties. Thus, the production of composite materials reinforced with vegetable fibers was evaluated in a polymer matrix constituted of terephthalic unsaturated polyester resin. The manufacturing process was hand-drawn using a silicone mold in the presence of sisal fibers (Agave Sisalana). The dimensions and frequency distributions of the natural fibers were determined. The mechanical characterization of the composites was studied through tensile tests. The fibers used in the experiment were in the in natura condition and chemically treated. For the verification of the strength and stiffness of the samples, AROTEC universal test machines were used. The tensile test of specimens reinforced with discontinuous fibers and randomly oriented fibers was used, using lengths of 5, 10, 15 mm, for mass fractions varying according to the volumetric capacity of the mold. In addition, a fractographic analysis was performed in the scanning electron microscope (SEM), to analyze in detail the fracture surfaces of the samples tested, in order to understand the fault mechanisms of each material. Very poor interfacial adhesion was observed and did not exhibit an appropriate mass fraction to maximize the mechanical properties thereof. The results were also compared with data found in the literature, correlating with other works with vegetal and synthetic fibers.
Plenary
10/3/19, 2:00 PM - 10/3/19, 2:25 PM
Presenter(s): walter luiz castro dos santos (vale sa), leandro resinentti zanon (vale sa)
Abstract:
In the production of iron ore pellets, one of the factors that strongly influence the cost of ore-pellet processing is the specific consumption of natural gas that occurs during the thermal processing stage of the pellets. The filtration process is the step where the adequacy of the moisture percentage of the retained pulp occurs, so that subsequently there is the processing in the subsequent stages of the pelotamento and hardening of pellets The water contained in the raw pellet is withdrawn at the stage of thermal processing. For this purpose, the literature indicates the demand of 600 Kcal/kg of water for the heating and vaporization of the moisture of raw pellets. The statistical analysis of the performance data of a pelletizing plant showed that for each decrement of 0.1% of water in the retained pulp is equivalent to the reduction of 0.091 Nm3 in the consumption of natural gas per tonne of pellets produced. Thus, the proper performance of the filtration stage is essential to reduce the percentage of pulp moisture retained and consequently to increase the energy efficiency of the pelletizing furnaces. This article presents the conduction of a work to increase the performance of filtration with a focus on the reduction in the percentage of retained pulp moisture and the positive impacts on the specific natural gas consumption of a pelletizing plant.
Plenary
10/3/19, 2:00 PM - 10/3/19, 2:25 PM
Presenter(s): Ivan R. Jankov (Rhamatech)
Abstract:
The Emission Limit Values (ELVs) for the Particulate Matter in the steel industry are defined by environmental legislation, requirements of the competent authorities, and/or environmental policies of the company, reaching 5 mg/Nm3. The implementation of the dedusting equipment to reach ELVs are always accompanied by performance test, based on gravimetric measurements of isokinetically obtained samples, which are used to demonstrate the abiding to the project specifications, as well as parametrisation of the Continuous Emission Monitoring systems. The measurements based on methods defined in the 1970s to 1990s, have shown questionable results for low level emissions of particulate matter. And, as a consequence, in EU and USA, new methods have been promulgated specific for such case. Although the performance of gravimetric tests is relatively common, when applied to low level emissions of particulates, special precautions are needed in order to ensure that the uncertainties do not invalidate the result, since in some cases the reproducibility reached approximately 50% of the measured value. It is our goal to analyse the main factors which influence the repeatability of the measurement and, based on the hands-on experience, present the practices which need to be implemented in order to increase the result reliability.
Plenary
10/3/19, 2:00 PM - 10/3/19, 2:25 PM
Presenter(s): frederic yann armache braga (anglo american)
Abstract:
Given the current scenario experienced by Brazilian mining industry, the study and development of technologies that enable a more secure and controlled disposal of tailings has gained significant relevance. Among the various alternatives and disposal methodologies, Anglo American has been developing tests on three study fronts: dewatering polymers, hydrocyclone dewatering and pulp filtration. The first two fronts are intended to optimize the way of occupying the existing tailings dam. The filtering is intended to reduce the mass transfer to the reservoir, extending the life time of the existing structure. The studies were divided into laboratory, pilot and industrial phases, aiming at proving applicability and scheduling for a definitive future installation. Until this moment, all tests have demonstrated gains and potentials of applicability.
Plenary
10/3/19, 2:00 PM - 10/3/19, 2:25 PM
Presenter(s): José Eustáquio da Silva (suncoke energy brasil)
Abstract:
This paper shows the structure of the SunCoke Way Program, based on the WCOM™ methodology. Practical results are shown showing the applicability and functionality of the methodology in various sectors of the company. These results are focused on process improvement and, above all, on the empowerment and engagement of people.
Plenary
10/3/19, 2:00 PM - 10/3/19, 2:25 PM
Presenter(s): Marcos Natanael Marinho (Usiminas), fernando de souza costa (usiminas), Dagoberto Brandão Santos (ufmg)
Abstract:
In industrial annealing processes, changes in the microstructure and mechanical properties of the steel occur throughout the thermal cycle. Thus, the correct planning of the thermal cycle is important to guarantee the homogeneity of the required properties, according to the application of the final product. This study aimed to evaluate the evolution of the microstructure, crystallographic texture and mechanical properties during annealing in a pilot furnace, considering a typical thermal cycle used in industrial batch annealing processes. The results show the main changes observed, mainly between the full hard and annealed steel. Throughout the thermal cycle it was possible to observe changes during the stages of recovery, recrystallization and grain growth. At about 26 h of annealing the stabilization of the properties required for the steel is observed.
Plenary
10/3/19, 2:00 PM - 10/3/19, 2:25 PM
Presenter(s): DARLAN VALE BAYãO (cefet-mg), geraldo lúcio de faria (ufop), Emiliana Cristina Marques Arthuso (aperam south america), Rogério Felício dos Santos (cefet-mg), Carlos Eduardo dos Santos (cefet-mg), Sidney Nicodemos da Silva (cefet-mg), ivete peixoto pinheiro (cefet-mg)
Abstract:
Duplex stainless steels (DSSs) are metal alloys that have a two-phase microstructure consisting of approximate volumetric fractions of ferrite and austenite. This microstructure provides the material an attractive combination of mechanical properties and corrosion resistance. The unbalance of the volumetric fractions of these phases can occur when the DSSs are exposed to high temperatures, either during production, welding or even under service conditions and may cause undesired changes in the alloy properties. In this context, the use of efficient methodologies that allow quantitatively evaluate the fractions of these phases in DSSs is of great relevance. Therefore, the aim of this work was to evaluate and compare the results of the quantitative stereology and ferritoscopy techniques to quantify the fractions of FERRITE in samples of a UNS S31803 (2205) DSS subjected to a solubilization heat treatment (HT) at 1050°C and different time intervals of aging HT at 850°C. It was concluded that the feritscope underestimates the fraction values of FERRITE when compared to quantitative stereology. Parameters such as texture, crystal lattice distortions, geometry of the sample and calibration standards influence on its measurement. Thus, quantitative stereology proved to be the most adequate technique for the quantification of phases in the DSSs.
Plenary
10/3/19, 2:00 PM - 10/3/19, 2:25 PM
Presenter(s): josé maurício dos santos pinheiro (centro universitário de barra mansa - ubm)
Abstract:
More corporations are developing their businesses based on new information technologies and the Internet. In this context, cyber security is paradoxically configured as a cost and a necessity for the survival of a corporation. Getting a system more secure and protected from viruses, Internet intrusions and acts of espionage or sabotage today is seen as something of significant value. Cyber security should be taken as a strategic option, not only technological or managerial, with a positive and undeniable impact on the business, being related to all the measures aimed at providing industrial networks with capacity for inspection, detection, reaction and reflection to potential attacks , allowing to reduce and limit vulnerabilities and their impact when they materialize. This article seeks to present the importance of integrated security solutions in the network environment in the concept of Industry 4.0.
Business Rounds
10/3/19, 2:00 PM - 10/3/19, 3:40 PM
Presenter(s): Coordinator: Eder Quental de Araújo – Senior energy and utilities specialist at Gerdau; Moderator: Cenira de Moura Nunes – Environmental Manager at Gerdau
Abstract:
Forum
10/3/19, 2:00 PM - 10/3/19, 3:40 PM
Presenter(s): Leonardo Alfredo Forero Mendoz - Associate Professor of Electrical Engineering at UERJ - Rio de Janeiro State University
Abstract:
Plenary
10/3/19, 2:25 PM - 10/3/19, 2:50 PM
Presenter(s): Emerson Edilson BARROS DE SOUZA (Universidade federal do ceará), Francisco Marcondes (UNIVERSIDADE FEDERAL DO CEARÁ), José Adilson de Castro (UNIVERSIDADE FEDERAL FLUMINENSE)
Abstract:
The blast furnace, characterized as a countercurrent metallurgical reactor, is the most used process for the production of primary iron, pig iron. At the process, iron ore and fluxes react with each other, forming liquid pig iron and slag, through reactions with gases produced by the combustion of coke in the combustion zone. In the present study, the cavity raceway was simulated using computational fluid dynamics (CFD) using the ANSYS Fluent® software that uses the Finite Volume Method for the calculation of conservation equations. Based on correlations and experiments, two validations of the proposed model will be presented. The first validation describes the behavior of the raceway cavity with the variation of the coke particle diameter and the velocity of the injection gas. The second validation describes the production of gases from the combustion of coke by the blast. The validations results were in agreement with those from the literature, both in magnitude and trends.
Plenary
10/3/19, 2:25 PM - 10/3/19, 2:50 PM
Presenter(s): marcus valério magnago (arcelormittal tubarão), alexandre medeiros (arcelormittal tubarão)
Abstract:
This article has as premise, to present the application of technological innovation, to improve safety in Logistics operations of ArcelorMittal Tubarão. In this document we will present the Logistics of storage and dispatch of products, its structure of operation, and the operations executed. Next, we will explain the safety improvements implemented with the aid of innovation and technology. Finally, the impact of these actions will be demonstrated for the execution of the work with less risk to the people and equipment involved in the logistics process of product dispatch, highlighting the benefits that technology can bring to logistics in the scope of safety and productivity.
Plenary
10/3/19, 2:25 PM - 10/3/19, 2:50 PM
Presenter(s): THUANY ESPIRITO SANTO DE LIMA (UNIVERSIDADE ESTADUAL NORTE FLUMINENSE), Ana Luiza Campinho Paes (UNIVERSIDADE ESTADUAL NORTE FLUMINENSE), Jonas alexandre (UNIVERSIDADE ESTADUAL NORTE FLUMINENSE), Afonso Rangel Garcez de azevedo (Universidade federal fluminense), Markssuel Teixeira Marvila (UNIVERSIDADE ESTADUAL NORTE FLUMINENSE), Euzébio Bernabé Zanelato (UNIVERSIDADE ESTADUAL NORTE FLUMINENSE), sérgio monteiro neves (instituto militar de engenharia)
Abstract:
The reduction of the cost and the execution time of buildings are undisputed advantages of structural masonry system. The basic feature of the system is the use of load - bearing walls, formed by structural blocks joined by mortar. The city of Campos dos Goytacazes has presented great economic advances in the last decades, mainly by the advent of the petrochemical industry, and more recently by the construction of the Açu Port. Such growth leveraged the civil construction, being observed numerous projects using structural masonry. Seeing the blocks are the basic component and therefore represent the greatest demand among the inputs in this construction system, the objective of this work is to carry out the technological control of concrete hollow blocks, 14x19x39 cm and 14x19x19 cm, manufactured in the city of Campos dos Goytacazes / RJ, according to the Brazilian technical norms. For this, a batch of 5000 units of each dimension was evaluated by taking a sample of 9 blocks from them. These blocks were submitted to dimensional analysis and evaluation of physical and mechanical properties. The results showed that both dimensions of concrete hollow blocks analyzed were classified as class B.
Plenary
10/3/19, 2:25 PM - 10/3/19, 2:50 PM
Presenter(s): ALAN JOSE SANTOS DE ALMEIDA (ternium brasil ltda.)
Abstract:
The use of coke as fuel in Blast Furnaces is necessary, despite the environmental constraints and the costs involved. To reduce the amount of coke used in the process, measures such as the injection of hydrocarbons are adopted, among which, the pulverized coal, which is proven a good partial substitute of coke loaded in the Blast Furnaces. Pulverized coal injection (PCI) provides a greater economic return, when used in the manufacturing process of pig iron, which allows a greater capacity of the injection rate when comparing with the use of oils, gases and other substituents. In the process of coal injection, according to the objective of the present work, it is necessary a low variability (ratio of the actual coal rate with the requested set point). The use of the methodology (Six Sigma) was of fundamental importance for the main actions adopted, and brought as main results, stability in the grinding and injection processes, as well as the reduction of the deviation of the injection rate from 16% to 10%, generating an economy for Ternium BR
Plenary
10/3/19, 2:25 PM - 10/3/19, 2:50 PM
Presenter(s): Juliana Peixoto Rufino Gazem de Carvalho (UENF)
Abstract:
There is a growing concern in the industry to develop materials that are considered eco-friendly materials and because of that researches have been done to develop materials that can replace those synthetic ones or even from nonrenewable sources. The use of the castor oil-based polyurethane matrix represents a more ecological option as replacement of other matrices such as epoxy and polyester. To perform an analysis of this material, initially, the density of the fibers was determined by the Archimedes method, in which a value of 2.390g / cm³ was obtained. A SEM analysis of the fibers was also done in order to understand their role and behavior as reinforcement in the polyurethane matrix, which can be better evaluated by an impact test set in Charpy configuration, for composites from 0 to 6 layers of jute fabric in polyurethane matrix incorporation. Based on the data obtained by the mechanical test, it was possible to observe the maximum impact energy absorption of 226.34J/m for polyurethane matrix composites with the incorporation of two layers of fabric, since the crack had less distance to propagate without "obstacles", contrary to what was observed in the 4-layer composites.
Plenary
10/3/19, 2:25 PM - 10/3/19, 2:50 PM
Presenter(s): igor quaremsa vianna (Vale S/A), Marcela Lessa de freitas (Vale S/A), Lilian Silva Costa (vale s/a), Laila Bonzi Ramos (Vale S/A)
Abstract:
The eighth pelletizing plant, located at the Tubarão Industrial Unit of Vale S/A in Vitória -ES, processes a pellet feed primarily composed of compact and friable itabirite from Itabira and Brucutu concentration plants, located in the iron quadrangle in Minas Gerais. The use of hydrated ores in the composition of the fine piles, such as Brucutu's common fines amphibolite itabirite (FABR), and Fábrica Nova pellet feed (PEFN), contributed to increase the energy efficiency of comminution, increasing the production of tumbling ball mills, minimizing the impacts during a mill preventive maintenance.
Plenary
10/3/19, 2:25 PM - 10/3/19, 2:50 PM
Presenter(s): andre luiz bonelar dos santos (ARCELORMITTAL tubarão)
Abstract:
The Coke ovens in the steel context is the area responsible for the production of metallurgical coke for the Furnaces: coke is obtained by heating the coal in vertical ovens heated by the burning of a fuel. The objective of this work is to present the changes made to ArcelorMittal Tubarão's Coke Batteries Combustion Control to ensure operational stability and greater control of the net coking time. The improvement of the mathematical model and the benefits obtained with a mathematic model adjusted to the current conditions of the process allowed to obtain a better distribution of heat along the heating walls and consequently the reduction of the cages, consumption of heat and emissions of pollutants, preserving the operational stability of the coke batteries and contributing to the extended life of the batteries.
Plenary
10/3/19, 2:25 PM - 10/3/19, 2:50 PM
Presenter(s): robson rodrigues martins (herculano mineração), césar junior dos santos (herculano mineração), fábio da silva dos santos (herculano mineração)
Abstract:
Tailings disposal has been a recurring theme of research in the major mining process development centers. This is due to the great interest of companies in reducing the social and financial impacts of their environmental liabilities. Another major driving force behind the search for new alternatives is the recent cases of environmental accidents in Brazil and abroad. According to the International Commission on Large Dam (ICOLD), two major accidents per year involving dams are reported worldwide. Hence, we realize that the analysis of the topic as well as the search for solutions becomes a challenge for both entrepreneurs and research institutions. In this work, a case study of the Herculano Mining will be carried out, working in the extraction and processing of iron ore. The main stages of the study are: technological characterization of tailings from the beneficiation process, analysis of filtration processes of this material for disposal in piles, bench tests and evaluation of the performance of the industrial facilities of the company in question. Herculano has an installed ceramic filtration equipment that faces operational difficulties in certain types of ore. At first, all the possibilities of adjusting this process will be analyzed so that it can filter the necessary mass of waste, acting in the rheology of the pulp (sedimentation, flocculation), regeneration of the ceramic plates and adjustments of the machine (filter), in order to obtain the best condition.
Plenary
10/3/19, 2:25 PM - 10/3/19, 2:50 PM
Presenter(s): mauro celso ferreira (companhia brasileira de alumínio), josé marcio marques (COMPANHIA BRASILEIRA DE ALUMÍNIO), daniel delbin (COMPANHIA BRASILEIRA DE ALUMÍNIO)
Abstract:
The team of maintenance focused on reliability has been watching closely the performance of industrial equipment through the KPI’s (Key Performance Indicators) and detected a slightly growth in the halt of the Aluminum Billets Casting Pit in the Casting department in 2017 impairing the production and thereafter, the internal/external clients. Therefore, it had been necessary to study this case apart so we could improve the reliability and availability of the Aluminum Billet Casting Pit. Through the actions taken with the support of RCM (Reliability-Centered Maintenance) and all the maintenance team, we managed to increase 12% in the MTBF (Mean Time Between Failure) of the plant, decreasing the halts of the Pits of 21,17 to 4,5 (average hours/month), which resulted in an increase in production volume of 9,336 tons at the end of 2018.
Plenary
10/3/19, 2:25 PM - 10/3/19, 2:50 PM
Presenter(s): mirelle oliveira spindola (Vallourec soluções tubulares do brasil), Vicente Tadeu Lopes Buono (Universidade federal de minas gerais)
Abstract:
Considering the high cost associated with the spheroidization heat treatment of bearing steels, it is necessary to study alternatives to decrease the annealing heat treatment time. This work aimed to develop a new manufacturing route in order to obtain a completely spheroidized microstructure. The microstructure and mechanical properties of the steel were evaluated after intercritical annealing with higher cooling rate than the conventional one, followed by cold deformation with different reductions in area, and subcritical annealings with different soaking times. It has been observed that the route considering the intercritical annealing with cooling rate 8 times higher than the conventional one, followed by a high cold reduction and subcritical annealing for 1 hour turns feasible the complete spheroidization of the SAE 52100 steel. For low cold reductions, even with subcritical annealing during 3 hours, the samples showed lamellar carbides.
Plenary
10/3/19, 2:25 PM - 10/3/19, 2:50 PM
Presenter(s): ANA CECILIA DE CARVALHO (Universidade federal de ouro preto), Amanda Aparecida Fátima Arruda (UNIVERSIDADE FEDERAL DE OURO PRETO), Paulo Sérgio Moreira (UNIVERSIDADE FEDERAL DE OURO PRETO), Rhelman Rossano Urzêdo Queiróz (CEFET-MG - Ouro preto), geraldo lúcio de faria (UNIVERSIDADE FEDERAL DE OURO PRETO)
Abstract:
The aim of this work was to evaluate the wear performance of thick oxide layers formed on the ferritic 410D stainless steel after its submission to isothermal heat treatments in an oxidizing environment. The 410D stainless steel was studied as manufactured and as heat treated at 900°C and 1000°C for different periods of time. The evaluation-applied method was the micro-abrasive wear test. The ball fastened to the plate methodology was applied. This study presents a qualitative and quantitative analysis of the 410D stainless steel in relation to its wear behavior in function of its superficial condition, as oxidized, or not oxidized. Microstructural alterations were also considered on result discussions. It was concluded that the surficial oxide layer developed after the isothermal heat treatments are adherent and has a great potential to be applied as a steel protection layer in applications where its wear performance is required.
Plenary
10/3/19, 2:25 PM - 10/3/19, 2:50 PM
Presenter(s): Joao Guilherme Carvalho Costa (Primetals TechnologieS)
Abstract:
Industry 4.0 concepts is the new biggest challenge on the industry nowadays and every company in every industry in every part of the globe is looking to implement this somehow on their factories and machines. To do that on the newest long rolling mills, that brings already onboard state-of-the-art technologies, is for sure a challenge of machinery builder industry, but how to become the long rolling mills built on 70’s, 80’s or 90’s part of this innovation process and connected to the new trends? This is the main mission here, to show some examples of applications that goes in this direction.
Plenary
10/3/19, 2:50 PM - 10/3/19, 3:15 PM
Presenter(s): ANDRE CABRAL DE OLIVEIRA (PAUL WURTH do brasil), Rudolf Hebel (Paul Wurth Deutschland GmbH), Markus BIEROD (Paul Wurth Deutschland GmbH), Eric SCHAUB (Paul Wurth Deutschland GmbH), Volker DULZ (PAUL WURTH DEUTSCHLAND GMBH), Martina ENGELMANN (Paul Wurth Deutschland GmbH)
Abstract:
Over the years and especially in the last two decades a number of different BF-hearth lining designs have been established worldwide. High hot metal (HM) productivity and extended life campaigns are main factors for the blast Furnace (BF) hearth lining concept and design. The pioneering work published by Dr. G. Still (TKSE- Germany) regarding sufficient hearth pool depth and inner hearth geometry , together with consequent Paul Wurth Germany’s (PWDE) blow out research work on almost hundred BFs worldwide, evolved in the important “BF-hearth characteristic indices” (BF-HCI). Using BF-HCIs is one of the main factors to reach the target of high productivity, along with a long BF-hearth lining life campaign. All single-, double- or multi-shell BF-hearth lining designs have to be evaluated on mentioned main factors to reach financial and process targets.
Plenary
10/3/19, 2:50 PM - 10/3/19, 3:15 PM
Presenter(s): RODRIGO JORGE DOS SANTOS ARRUDA (SEPETIBA TECON SA), Sergio da Cunha Motta (SEPETIBA TECON S/A), Marcelo Xavier Gonçalves (SEPETIBA TECON S/A)
Abstract:
In search of a solution to mitigate the risks to which SEPETIBA TECON S / A employees are exposed, reduce costs, eliminate wood consumption and use of methyl bromide (ozone depleting substance in the process of treatment of wood for export), we sought to innovate the process of lashing horizontal and vertical axis coils reels up to 13 tons, continuing the process started in 2017. For this, the project was designed that replaces all wood used in the lashing (load locking) by straps with polyester filaments of high tenacity and homopolymer polypropylene, making the process sustainable, safe and more efficient.
Plenary
10/3/19, 2:50 PM - 10/3/19, 3:15 PM
Presenter(s): João Victor Soares Chagas (ufes), rAONI caetano barbieri (ufes), Lumena glória de souza nunes (ufes), jaime alberto sanchez caceres (ufes), carlos augusto cardoso passos (ufes)
Abstract:
The improvement of microscopy techniques and also of image analysis methods implies a challenge when it comes to performing quantitative, automated and precise analyzes in a large set of images. In this scenario, machine learning methods have emerged as a valuable tool in the segmentation process. These methods turn the problem of image segmentation into a problem of pixel classification, considering the operator knowledge, increasing the accuracy in the detection of regions of interest and allowing the automation of the process. The Trainable Weka Segmentation (TWS) is a plugin within the open source software Fiji that uses machine learning to segment an image. In this plugin, the operator indicates which are the pixels belonging to each class and, with training, the classifier segments the entire image. In this work, we show how TWS can be used to determine grain size in ceramic materials. We applied this methodology to 8 images of a Lead Zirconate Titanate ceramic (PZT), obtained by Scanning Electron Microscopy. We obtained the value of average grain size equal to (1,82 ± 0,07) μm.
Plenary
10/3/19, 2:50 PM - 10/3/19, 3:15 PM
Presenter(s): Alex Milton Albergaria Campos (Universidade federal de ouro preto)
Abstract:
Agribusiness is one of the largest generators of the world income, and its production accounts for one third of the world economy. From the harvest until the processing of their products, the agricultural activity generates a great amount of waste that often does not have a correct allocation, which ends up being a problem. This waste has great potential for partial replacement of fossil fuels such as coal. The coal burned in blast furnaces accounts for about 60% CO2 emissions in the steel industry. However, agricultural activity may contribute to the removal of CO2 from the atmosphere as the crop grows. Therefore, the use of agribusiness waste may be feasible to be used in the blast furnace injection, replacing part of the coal. Some studies have shown that sugarcane cultivation and charcoal production in Brazil, corn cultivation in the United States, as well as the use of Moringa oleifera waste in India, can be used to bring financial gains. Furthermore, carbon credits can also be generated. In this work, chemical, physical and thermal comparison of some agribusinesses waste with potential to be used as material injected into the blast furnace together with the coal are shown. In addition, the economic feasibility and the possibility of reducing CO2 emissions in this process are commented
Plenary
10/3/19, 2:50 PM - 10/3/19, 3:15 PM
Presenter(s): iris sterfanie santos (ufs), Thais Eloy Guimarães Nascimento (Universidade Federal de Sergipe), Ana Larissa Cruz Prata (Universidade Federal de Sergipe), Renan Praciano Ideburque Leal Sandes (Universidade Federal de Sergipe), Carlos Otávio Damas Martins (Universidade Federal de Sergipe), Sandro Griza (Universidade Federal de Sergipe)
Abstract:
In civil construction, concrete is a material widely used for the execution of structural elements. With this, we are currently paying attention to the knowledge of its state of deterioration and safety. Based on this, the search for methods that allow to evaluate the structures is growing. In this context, non-destructive tests (NDTs) are of paramount importance to evaluate the performance of structures, through the diagnosis of problems and quality control, which influence the performance of concrete buildings, besides being a non-destructive technique that preserves the present state of the structure. The present article highlights the importance of the use of ultrasonic equipment, non-destructive ultrasonic wave emission test, in the qualitative and quantitative analysis of columns in reinforced concrete, comparing it with the results obtained in the breaking of test specimens by axial compression, a vertical residential building located in Aracaju SE. The results indicate the efficiency of the ultrasonic technique. The concrete, in general, presented compactness and the indirect method to obtain the compressive strength and Young's modulus showed to be promising in detriment to the direct method
Plenary
10/3/19, 2:50 PM - 10/3/19, 3:15 PM
Presenter(s): alexandre gnçalves andrade (vale Sa), tatiane ferreira alvarenga (vale sa), Crisley Dellaqua Pacheco (vale), gabriel miranda teixeira (vale SA), Aline Maria Santoro Nasaré (VALE)
Abstract:
Diffuse emissions are that directly related to particulate matter suspended from civil structures, materials disposed in conveyor belts carried out by wind, stack e reclaimers operations and that one where dust collectors are not able to act correctly. Vale implemented in the last years a unique system capable to measure this kind of dust, called RAMPs (Dust Monitoring Automatic Network), which creates an analytical net in Tubarao industrial site, located in Vitória, ES. In order to prevent diffuse emissions in Tubarao’s pellets stockyard, it was proposed and developed a predictive model based on operational and climate variables available on the site, using big data and advanced analytics tools. The models developed shows to be adherent to the real emissions rates measured by the RAMPs and proved to be an efficient tool to predict emissions over the internal target with 4 hours of precedence
Plenary
10/3/19, 2:50 PM - 10/3/19, 3:15 PM
Presenter(s): Gustavo Henrique Pinto de Oliveira (usiminas)
Abstract:
The process of obtaining coke in a conventional Non-Recovery coking plant consists of heating the coal mixture, causing devolatilization, generating coke which is the main fuel used in blast furnaces. The heating of the coal mixture occurs indirectly; the furnace walls receive heat from the combustion chamber fed by a mixture of blast furnace gas, coke oven gas and Linz Donawitz gas, or exclusively by the coke oven gas. Coke oven gas is essentially composed of hydrocarbons and is treated to remove impurities, tar, ammonium sulfate and light oils. Residual elements in the gas, even after the treatment process, are extremely harmful to the distribution pipes, forming corrosive compounds, that can lead to the collapse of pipes, causing accidents, expenses with repairs and loss of production. In this context, the present work aims to present the factors that led the replacement the main gas pipelines distribution in the basement coking plant 3 of Usiminas Ipatinga, ensuring process safety and operational stability
Plenary
10/3/19, 2:50 PM - 10/3/19, 3:15 PM
Presenter(s): marcelo duarte silva (suez water technologies & solutions), ediron antônio lage (suez water technologies & solutions), José otávio gurgel de andrade (suez water technologies & solutions), César Júnior dos Santos (Herculano Mineração), Robson rodrigues martins (herculano mineração), Fábio Da Silva dos Santos (herculano mineração)
Abstract:
Ceramic filtration technology, despite consuming about 90% less energy than conventional vacuum filters and producing clean water ready for reuse, faced a big challenge that put in doubt its technical and economic viability. In 2015, the production of pellet feed in this last stage of the process of the Minas-Rio Complex of Anglo American was impacted by deep fillings in the filter medium. The chemical regeneration process indicated by the filter manufacturers did not have the necessary effect. SUEZ then carried out a research work on the potential causes and indicated specialty chemicals. After an intense work of the Anglo American technical team supported by SUEZ, an efficient regeneration methodology was developed. From this reference, SUEZ received another 03 similar challenges with ceramic filters. Among them, the Herculano Mineração Dry Stacking pioneer project, which until 2017 could not process more than 20% of the tailings generated in the pellet feed concentration process. Following adaptations in the regenerative methodology as a function of the mineral characteristics facilitated by the development of a pilot backwash system, success was achieved, providing a condition for production of 3.0Mtpy without the use of tailings dam and with continued decline in the unit cost of the tailings filtration operation.
Plenary
10/3/19, 2:50 PM - 10/3/19, 3:15 PM
Presenter(s): ana keli martins alves camilo (vale s/a), Bruno Oliveira de Melo (vale s/a), Gabriel Rodrigues Goggi (vale s/a), Willian Schuwambach Stein (vale s/a), Givaldo Rodrigues da Silva (vale s/a), Marcelo Milheiro da Silva (vale s/a), Flavio Geraldo de Oliveira (vale s/a), Thiago Nicoli de Abreu (vale s/a), Maxwel Delunardo (vale s/a), Alessandra da Silva Marques (vale s/a)
Abstract:
The objective of this work is to integrate Productive Process Management and Asset Management, focusing in optimization of total cost, quality and production. It was started with the deitailing of Operational and Process Governance, combinig the concepts of process and maitenance management, unfolding of operacional strategy and its monitoring. The monitoring of execution of process control strategy is carried out by integrated Asset Monitoring Center, as a result of the integration of individual monitoring centers, which has a systemic view of the business. As indicator, Operational Performance Index is used, that considers the impact of assets conditions in productive process performance. The monitoring is performed by mpPM (maintenance and process performance management), which enables to identify deviations that impacts in performance. In addition, it was elaborated the Operational Plan, using concepts os Maintenance Plan, and considers relevant operational activities which are programmed by work orders. One of programming bases is operational inspection, performed by data coletor, which feeds the operacional and maintenance programming. In conclusion, we could observe evolution in the maturity of process and maintenance analyses, which consider the impact of asset condition in pelletizing plant performance, and impact of process control strategy in asset integrity.
Plenary
10/3/19, 2:50 PM - 10/3/19, 3:15 PM
Presenter(s): GERALDO LUCIO DE FARIA (Universidade Federal de Ouro Preto), Karine Fernandes Rodrigues (Universidade Federal de Ouro Preto)
Abstract:
With the increasing demand for rail transportation, railways have been subjected to increasingly severe conditions of mechanical solicitation. Thereat the requirement for rails made from steels with good mechanical performance has been increasing, as well as the application of improved welding techniques that require less maintenance. Thus, it has been increasingly discussed the importance of the knowledge about kinetics of phase transformation in eutectoid steels applied in railways, aiming at the improvement of manufacturing and welding processes. In this context, since there are not many studies considering kinetics of phase transformation in pearlitic steels applied to the railway industry, as well as studies exploring mathematical models of predictability that can be used to improve the processing of these steels, in this work, through the dilatometry technique, the austenite transformations under continuous cooling in the three eutectoid steels were analyzed. The Continuous Cooling Transformation (TRC) diagrams has been determined for each studied steel. The study also showed that applying mathematical models available in technical literature it is possible to predict the kinetics of phase transformation when the three studied steels are submitted to continuous cooling.
Plenary
10/3/19, 2:50 PM - 10/3/19, 3:15 PM
Presenter(s): Nathan Fernandes Ignácio (UNIVERSIDADE fEDERAL fLUMINENSE), Filipe da Silva Siqueira (UNIVERSIDADE FEDERAL FLUMINENSE), Weslley Luiz da Silva Assis (UNIVERSIDADE FEDERAL FLUMINENSE), Paulo Rangel Rios (UNIVERSIDADE FEDERAL FLUMINENSE)
Abstract:
The study of phase transformation has acquired new horizons from Rios & Villa recent discoveries. They developed unprecedented analytical exact models from stochastic geometry. These models given an accurate solution for non-homogeneous nucleation and growth problems. This work aims to study cluster nucleation, whose solid-solid phase transformation’s kinetics considerably deviates from that forecast by the KJMA model. In this nucleation scenario, the nuclei are not homogeneously distributed on the matrix, but are concentrated on preferred regions called clusters. One of the major parameters of this nucleation is the clusters’ number on the matrix. In this work, a compatible numerical model, based on the causal cone theory, were used to model nucleation and growth reactions, which occurs specifically on the form of spherical clusters. It was possible to analyze the effect that the variation of the cluster’s number induces on the phase transformation’s kinetics and compare those results with the analytical model from Rios & Villa. From that comparison, it is possible to observe that Rios & Villa’s equations corroborates the numerical results. As main conclusions, the lower the clusters’ number, the slower the phase transformation reaction occurs. Also, the generated microstructure have their own characteristics and the results can be misinterpreted if the presence of the clusters is not properly detected.
Plenary
10/3/19, 2:50 PM - 10/3/19, 3:15 PM
Presenter(s): Glaucon medeiros Silva (vale s.a.)
Abstract:
This technical work aims to present the evolution of porosity tests in iron ore pellets. Presenting the different forms of realization of this type of test and the non-correlation between them, because each method has a distinct purpose and as it happened the evolution of the volumetric (optical) method since its manual realization, in the 1980s, beginning of automated measurements in the 1990s and its total automation from the decade of 2010 until the year 2019.
Plenary
10/3/19, 3:15 PM - 10/3/19, 3:40 PM
Presenter(s): beatriz fausta gandra (usiminas)
Abstract:
The blast furnace campaign extension has been a common practice in several companies considering the current steel scenario. In this context, Usiminas has carried out several actions to preserve the blast furnaces, reconciling with the maintenance of competitiveness. In particular, Ipatinga Blast Furnace 3 passed through two staves exchanges in 2015 and 2018, totaling the replacement of 68 pieces. The present paper presents the planning and execution of the operational return after the 2nd staves exchange, highlighting the contingencies adopted and lessons learned from the occurrences that impacted the compliance with the schedule. This intervention will enable the postponement of the Blast Furnace#3 reform to 2021, in alignment with the company's guidelines and guaranteeing operational stability, fundamental for compliance and overcoming the targets.
Plenary
10/3/19, 3:15 PM - 10/3/19, 3:40 PM
Presenter(s): EVANDRO TOLENTINO (CENTRO FEDERAL DE EDUC TECNOLOGICA DE MG), Raquel salgado Batista (Centro Universitário do Leste de Minas Gerais, UNILESTE-MG), Dyandra Lorayne Souza Pereira (CENTRO UNIVERSITÁRIO DO LESTE DE MINAS GERAIS, UNILESTE-MG), Armin Franz Isenmann (CENTRO FEDERAL DE EDUC TECNOLOGICA DE MG)
Abstract:
Kraft process is one of the major alkaline process used to convert wood to pulp. The solution obtained after the removal of the fiber is named black liquor, a very complex liquid, consisted of high alkalinity and high dissolved solids such as lignin residues, degraded carbohydrates and inorganic constituent. In this study the use of lignin from black liquor as chemical admixture for Portland cement mortars was investigated. Cement paste and mortar mixtures were prepared with 0.05% wt., 0.1% wt., 0.3% wt., and 0.5% wt. lignin addition, and they were tested for workability and setting time. From results it was shown that lignin addition did not modified the workability performance of mortars. However, 0.3% wt., and 0.5% wt. of lignin addition increased cement pastes setting time, proving that lignin could act as set retarder.
Plenary
10/3/19, 3:15 PM - 10/3/19, 3:40 PM
Presenter(s): paulo eduardo marcelino de souza (ternium brasil)
Abstract:
Ternium Brasil, located in Rio de Janeiro, has two Blast Furnaces. Both began operation in 2010, Blast Furnace 01 in 13/07/2010 and Blast Furnace 02 in 06/12/2010. The GAD is a process unit that has the purpose of receiving, classifying, dosing the raw coal and perform its grinding and drying for the process of injecting coal sprayed in Blast Furnace to Coke. The work presents the process of improvement, the management resources applied and the short and long term perspective and the result achieved so far
Plenary
10/3/19, 3:15 PM - 10/3/19, 3:40 PM
Presenter(s): Edwillson Gonçalves de (UFPA), Roberto Tetsuo Fujiyama (UFPA), Alisson Clay Rios da Silva (UFPA), Veronica Scarpini Candido (UFPA), Sérgio Neves Monteiro (IME-RJ)
Abstract:
The use of natural fibers as reinforcement for polymeric composites replacing synthetic fibers has been growing in the last decades for different industrial sectors because they have unique properties. Thus, the production of composite materials reinforced with vegetable fibers was evaluated in a polymer matrix constituted of terephthalic unsaturated polyester resin. The manufacturing process was hand-drawn using silicone mold in the presence of the piassava fiber (Attalea funifera Mart). The dimensions and frequency distributions of the natural fibers were determined. The mechanical characterization of the composites was studied through tensile tests. The fibers used in the experiment were in the in natura condition and chemically treated. For the verification of the strength and stiffness of the samples, AROTEC universal test machines were used. The tensile test of specimens reinforced with discontinuous fibers and randomly oriented fibers was used, using lengths of 5, 10, 15 mm, for mass fractions varying according to the volumetric capacity of the mold. In addition, a fractographic analysis was performed in the scanning electron microscope (SEM), to analyze in detail the fracture surfaces of the samples tested, in order to understand the fault mechanisms of each material. Very poor interfacial adhesion was observed and did not exhibit an appropriate mass fraction to maximize the mechanical properties thereof. The results were also compared with data found in the literature, correlating with other works with vegetal and synthetic fibers.
Plenary
10/3/19, 3:15 PM - 10/3/19, 3:40 PM
Presenter(s): Giulio Antunes de Medeiros (Universidade Federal Fluminense)
Abstract:
To analyze the direct reduction of self-reducting briquettes producted with different electric arc furnace dust contents, three sets of homogeneous mixtures were produced with elephant grass biomass, iron ore, cement and furnace dust in increasing levels, which were submitted to thermogravimetric tests in muffle furnace and TGA furnace at variable temperatures and times. The curves of degree of reduction were obtained and the reduced briquettes were analyzed by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results showed that the reducibility of the agglomerates is diminished by the increase of furnace dust, with variations of this result at higher temperatures. The observed microstructures were spherical particles, porous structure or whiskers. Based on XRD results, it was considered probable that the decrease of the degree of reduction with the increase of furnace dust content is related to the reaction between hematite and zincite, which is expected to be controlled by zinc diffusion.
Plenary
10/3/19, 3:15 PM - 10/3/19, 3:40 PM
Presenter(s): LORENA CRISTINA AMORIM MOURA (UNIVERSIDADE FEDERAL DE OURO PRETO)
Abstract:
In the current competitive scenario, one of the lines for reducing the cost of coal blending is the development of national alternative raw materials that minimize the cost of coke and mitigate CO2 emissions. The present work evaluated the use of shredder residues (fluff) as an additive in blends for the production of metallurgical coke. The use of fluff in the coal mixture suggests an ecologically correct destination route to mitigate the impact caused by the accumulation of this residue in the environment, as well as an alternative to reduce metallurgical coke production costs. In order to evaluate the impact on the quality of the coke, especially on the Resistance after Reaction with CO2 (CSR) and the Cold Mechanical Resistance (DI 150-15), pilot scale was created with the addition of fluff. The results showed the technical feasibility of adding up to 1% of the material, maintaining the quality of the coke produced.
Plenary
10/3/19, 3:15 PM - 10/3/19, 3:40 PM
Presenter(s): Nilton carlos torquato (Vale), Washington Pirete da Silva (vale), Marco Túlio Santiago Ferreira3 (vale)
Abstract:
In 2005, with the significant reduction of iron content in the “Quadrilátero Ferrífero” reserves, Vale began the study of alternatives for the tailings disposal in other structures, that are not tailings dams. In 2011, after bench-scale and pilot-scale tests, it was defined to implement the project "Alternative methods for tailings disposal", including the construction of experimental drainage piles to get mineral and geotechnical process parameters for future projects. The result of this study shows that it is technically possible to replace traditional tailings disposal (dams), to dry stacking, with the proportion up to 20% of ultrafine tailings in the total tailings composition, however, this study is in evolution and the scale of the project / pile is being gradually increased to guarantee a good performance for the mineral and geotechnical process.
Plenary
10/3/19, 3:15 PM - 10/3/19, 3:40 PM
Presenter(s): ANDRE LUIZ DA SILVA FONSECA (ARCELORMITTAL BRASIL SA)
Abstract:
This presentation shows how ArcelorMittal Tubarão moved from a KPI-based culture to an organization focused on EBITDA results through internal and external benchmarking, cost deployment and operational risk management. Which tools have been developed to support the analyzes and improve the management of the initiatives. What were the contributions of Lean and 6 Sigma along this JOURNEY
Plenary
10/3/19, 3:15 PM - 10/3/19, 3:40 PM
Presenter(s): RAFAEL RICARDO MAGALHÃES (USIMINAS)
Abstract:
In this work was studied the effect of the start and end overaging (OA) temperatures stage of a continuous annealing cycle on the microstructure and the mechanical properties of a low-carbon TRIP steel of 780 MPa in order to determine the best conditions in terms of mechanical properties. Samples of the steel were annealed to the temperature of 800 °C and after this process were cooled to OA start temperature at 420 °C. Then, the samples remained at that temperature for a period of 5 min or were cooled to temperatures of 380 °C and 340 °C. After the simulations of the continuous annealing cycles, all samples were submitted to the metallography and tensile tests for microstructural evaluation and mechanical properties of the steel. The microstructures presented variable fractions of ferrite, bainite, retained austenite and small portion of martensite. All conditions reached a minimum tensile resistance of 780 MPa, and it was possible to highlight the condition with isothermal temperature of 420 °C in the overaging stage where they presented the best results of mechanical properties and typical characteristics of TRIP steels.
Plenary
10/3/19, 3:15 PM - 10/3/19, 3:40 PM
Presenter(s): GUILHERME DIAS DA FONSECA (Universidade federal fluminense ), André Luiz Moraes Alves (UNIVERSIDADE FEDERAL FLUMINENSE ), Felipe da Silva Siqueira (UNIVERSIDADE FEDERAL FLUMINENSE ), Camila dos Santos Pinto (UNIVERSIDADE FEDERAL FLUMINENSE ), Weslley Luiz da Silva Assis (UNIVERSIDADE FEDERAL FLUMINENSE ), Paulo Rangel Rios (UNIVERSIDADE FEDERAL FLUMINENSE )
Abstract:
In this work, the kinetic behavior of phase transformations by nucleation and growth in the polyhedra interfaces (faces, edges and vertices), of Kelvin, Voronoi and Monte Carlo matrices was studied through computacional simulation. With the main objective to compare results of the simulations with the analytical models of theory of Johnson Mehl-Avrami-Kolmogorov (JMAK) and John W.Cahn, the matrices were generated by stochastic models and through the Casual Cone growth method. The understanding of engineering about the behavior of phase transformations by nucleation and growth are important to predict posible nucleations sites, as well as to understand the behavior of the constituents present in iron carbono diagram, decomposition of austenite, recrystallization process, among others. Thus, the computational modeling was used to study the phase transformations by nucleation and growth, getting results of volumetric fraction, the microstructural path and the contiguity. Both results were important for microstructural characterization and to describe the distribution of nuclei in space. Was observed from the results obtained, that if the nuclei are well distributed in the interfaces the impinge-me will be weak, leading to Voronoi and Kelvin simulations to corroborate with teh analytical modelo JMAK. On the other hand, the Monte Carlo model did not present the same behavior. It was evidenced that randomness will not be valid in all cases. It was also verified that the amount of nuclei increases significantly, the distribution loses the characteristic of randomness and starts behaving like clusters, corroborating with the analytical modelo of Cahn
Plenary
10/3/19, 3:15 PM - 10/3/19, 3:40 PM
Presenter(s): Camial fernandes rezende bragança (arcelormittal tubarão), Camila Simon Christ (ARCELORMITTAL TUBARÃO), MARCUS VINICIUS PIMENTEL GOMES (ARCELORMITTAL TUBARÃO), Vinicios Andreatta (ARCELORMITTAL TUBARÃO)
Abstract:
Data integration from many heterogeneous systems has always been necessary and considered as a challenge for the industrial technical units. For the technical area of the Steel Making Plant, the integration of data generated by Instrumentation, Automation and Manufacturing Execution System (MES) is essential for the analysis and process optimization. This process while manually done was unproductive and error risk. Even with the support of IT (Information Technology) and PA (Process Automation) teams, in some cases this process was impracticable due to complexity. With the use of an analytical tool, already used in other process areas (Hot Strip Mill and Quality Control), was possible to provide access to different data sources, allowing integration of this information in an agile and simplified way, consuming the same data and following the same rules. The automation of this process brought the following benefits: data quality improvement, data democratization, faster problem investigation and process optimization with less dependence on IT and PA teams. With use of an analytical tool already present in other process areas (Hot Strip Mill and Quality) was possible to provide access to different data sources, allowing integration of this information in an agile and simplified way, consuming the same data and following the same rules. The automation of this process brought the following benefits: data quality improvement, data democratization, faster problem investigation and process optimization with less dependence on IT and PA teams.
10/3/19, 3:40 PM - 10/3/19, 5:20 PM
Presenter(s):
Abstract:
Keynote speaker
10/4/19, 8:00 AM - 10/4/19, 5:00 PM
Presenter(s): Usiminas: Cubatão; Gerdau: Pindamonhangaba;
Abstract:
6/9/21, 8:35 AM - 6/9/21, 3:40 PM
Presenter(s): Coordinators: Débora Oliveira – director for corporate matters at Brazil Steel Institute; Geraldo Iran de Souza Lima Cardoso – director at ABM’s Midwest Regional Unit
Abstract:





