DEVELOPMENT OF A COMPUTATIONAL TOOL FOR OPTIMIZATION AND VALUE IN USE FORECAST FOR IRON ORE PELLETS THROUGH THE DIRECT REDUCTION: ELECTRIC STEELMAKING ROUTE / DESENVOLVIMENTO DE UM MODELO COMPUTACIONAL DE OTIMIZAÇÃO E PREDIÇÃO DO VALOR DE USO DE PELOTAS DE MINÉRIO DE FERRO NA ROTA REDUÇÃO DIRETA: ACIARIA ELÉTRICA

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

The study at issue searched for developing an innovative tool able to effectively analyze and optimize the industrial usage of iron ore pellets undergoing traditional gas-based direct reduction processes. The creation of a thermochemical model for MIDREX process was proposed and carried out by PUC-Rio, taking into account relevant characteristics related to DRI carburization and reduction kinetics, as well as some important operating parameters. Subsequently, this model was adapted in order to interact with a second thermo-chemical model owned by RS Consultants and able to represent an electric arc furnace operation. In this sense, it has been possible to represent thereby the iron and steelmaking route based on direct reduction and electric arc furnace. For the computational management of the optimization methodology and interaction involving the two models above-mentioned, a third model was developed and referred to as GESTOR model. It was built to maximize the DRI usage ¯ and pellets utilization, consequently ¯ respecting certain operating conditions previously established. Economic assessments shall be made premised upon value in use concepts. Some results are shown in this study, based on a hypothetical scenario, aiming at proving the effectiveness of this tool. Its adoption by Samarco´s experts is expected as an important supportive methodology to help them to make decisions properly concerning both marketing strategies and product development activities.

ASSUNTO(S)

reducao direta modelamento modeling termoquimico direct reduction pellets minerio de ferro thermochemical pelotas iron ore

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