Search Results - "Tavares, Roberto Parreiras"

Analytical and numerical determination of the heat transfer coefficient between scrap and hot metal based on small-scale experiments by Penz, Florian Markus, Tavares, Roberto Parreiras, Weiss, Christian, Schenk, Johannes, Ammer, Rainer, Pastucha, Krzysztof, Klösch, Gerald

“…•Experimental Investigation of the heat transfer coefficients.•Coefficients achieved approx. 10x smaller than calculated with Nusselt correlations.•Explicit…”
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Discussion of the Paper “A New Method Based on the F-Curve for Characterizing Fluid Flow in Continuous Casting Tundishes” by Li et al by Martins Braga, Bernardo, Parreiras Tavares, Roberto

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Evaluation of the Effects of Gas Injection in the Vaccum Chamber of a RH Degasser on Melt Circulation and Decarburization Rates by Neves, Leonardo, Hugo Passos Ornelas de Oliveira, Tavares, Roberto Parreiras

“…Steels with low concentrations of nitrogen, hydrogen and carbon have in large demand lately. The RH process is a secondary refining process that can…”
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Additional Information on “Fluid Flow Characterization in Asymmetric Tundish” by Cui, Liu and Li by Braga, Bernardo Martins, Tavares, Roberto Parreiras

“…Cui et al.1) proposed a methodology for the fluid flow characterization of asymmetric tundishes that does not rely on any idealized flow model. First, the E…”
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Additional Information on “Simple Tundish Mixing Model of Continuous Casting during a Grade Transition” by Cho and Kim by Braga, Bernardo Martins, Tavares, Roberto Parreiras

“…Cho and Kim1) proposed a simple model for predicting the amount of mix steel generated during ladle changes involving different steel grades in the same…”
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Description of a New Tundish Model for Treating RTD Data and Discussion of the Communication “New Insight into Combined Model and Revised Model for RTD Curves in a Multi-strand Tundish” by Lei by Braga, Bernardo Martins, Tavares, Roberto Parreiras

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Similarity Criteria for the Study of Removal of Spherical Non-metallic Inclusions in Physical Models of Continuous Casting Tundishes: A More Fundamental Approach by Braga, Bernardo Martins, Tavares, Roberto Parreiras

“…Physical modeling is widely used for studying steelmaking processes. The accuracy of this technique depends on the use of appropriate similarity criteria…”
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Correction to: Comparison of Uniform and Non-uniform Water Flux Density Approaches Applied on a Mathematical Model of Heat Transfer and Solidification for a Continuous Casting of Round Billets by Assuncao, Charles Sostenes, Tavares, Roberto Parreiras, Oliveira, Guilherme, Pereira, Luiz F. P.

“…Luiz F.P. Pereira’s name appeared incorrectly on the original publication of this article. It has been corrected here…”
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Comparative analysis of the thermal behavior of blooms and beam-blanks during continuous casting: Development and validation of a mathematical model for heat transfer by Gomes, Daniela Fátima, Braga, Bernardo Martins, Tavares, Roberto Parreiras, Bagatini, Maurício Covcevich, Filho, Carlos Berlini, Maciel, Gabriela Pereira

“…The present work explores the feasibility of producing blooms and beam blanks in a continuous casting machine using a single support rollers setup, aiming to…”
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Trajectory of Top-Dross Particles During the Melting of Zinc Ingot in Galvanizing Pot by Vieira, Ronaldo Rodrigues, Duarte, Izabela Diniz, Eleutério, Henrique Lacerda, de Oliveira, Thalisson Gustavo, Bagatini, Maurício Covcevich, Tavares, Roberto Parreiras

“…The production of hot-dip galvanized steel presents great challenges, because it is currently the main raw material in the manufacturing of automobiles, and…”
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Mathematical model for the temperature profiles of steel pipes quenched by water cooling rings by Gomes, Daniela Fátima, Tavares, Roberto Parreiras, Braga, Bernardo Martins

“…The quenching process is one of the most important steps in steel heat treatment and has a significant impact on the quality of the product. In systems with…”
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Numerical Simulation of Zinc Flow in Different Layouts of Galvanization Pot by Vieira, Ronaldo Rodrigues, Eleutério, Henrique Lacerda, Oliveira, Thalisson Gustavo de, Bagatini, Maurício Covcevich, Tavares, Roberto Parreiras

“…The production of galvanized steel with zinc (GI) presents great challenges due to the high demand for surface quality required for its applications. The…”
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Assessment of iron ore pellets production using two charcoals with different content of materials volatile replacing partially anthracite fines by Praes, Gustavo Eduardo, Arruda, José Dimas de, Lemos, Leandro Rocha, Tavares, Roberto Parreiras

“…Iron ore pelletizing plant consumes coal, pet coke, oil and natural gas to get the required chemistry, physical and metallurgical properties for iron ore…”
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Physical and mathematical modeling of inclusion behavior in a tundish with gas curtain by Souza, Gisele Márcia de, Mendonça, Alexandre de Freitas Gomes de, Tavares, Roberto Parreiras

“…Abstract Gas injection in the tundish has been considered as an alternative to optimizing inclusion removal from steels. In the present study, physical and…”
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Comparison of Uniform and Non-uniform Water Flux Density Approaches Applied on a Mathematical Model of Heat Transfer and Solidification for a Continuous Casting of Round Billets by Assuncao, Charles Sostenes, Tavares, Roberto Parreiras, Oliveira, Guilherme, Pereira, Luiz Carlos

“…In the present work, the water flux densities of nozzles with flat jet and full cone jet were experimentally measured using an apparatus in industrial scale…”
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Evaluation of the permeability of the dripping zone and of flooding phenomena in a blast furnace by Andrade, Dimas Henrique Barros, Tavares, Roberto Parreiras, Quintas, Alfredo Carlos Bitarães, Moreira, Victor Eric de Souza, Viana, Arthur Oliveira, Gasparini, Vitor Maggioni

“…In the current scenario of quality impoverishment of the raw materials charged into blast furnaces, it becomes fundamental to understand the phenomena that…”
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Effect of blow parameters in the jet penetration by physical model of BOF converter by Maia, Breno Totti, Imagawa, Rafael Kajimoto, Petrucelli, Ana Clara, Tavares, Roberto Parreiras

“…It is important to know about the bath behavior to reduce the blow time and splashing in top of the converter. The target of this work is to compare works on…”
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EOF cold model-study of bath behavior by Maia, Breno Totti, Imagawa, Rafael Kajimoto, Abreu, Gustavo, Petrucelli, Ana Clara, Tavares, Roberto Parreiras

“…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…”
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NON-UNIFORM WATER FLUX DENSITY APPROACH APPLIED ON A MATHEMATICAL MODEL OF HEAT TRANSFER AND SOLIDIFICATION FOR A CONTINUOUS CASTING OF ROUND BILLETS by Assunção, Charles Sóstenes, Tavares, Roberto Parreiras, Oliveira, Guilherme

“…In the present work, the water flux densities of nozzles with flat jet and full cone jet were experimentally measured using an apparatus in industrial scale…”
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EVALUATION OF FLOW DISTRIBUTION IN THE PELLETIZING FURNACE THROUGH CFD AND EXPERIMENTAL VALIDATION AT SAMARCO by Athayde, Maycon, Tavares, Roberto Parreiras, Nunes, Sergio Fernando, Fonseca, Mauricio Cota

“…Samarco produces iron ore pellets thermally processed in Travelling Grate furnaces. This process is essential in order to obtain adequate mechanical strength…”
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