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- Title
ESTUDO NUMÉRICO DA INFLUÊNCIA DE PROPRIEDADES DE AMOLECIMENTO E FUSÃO NA CINÉTICA DE FORMAÇÃO DE (CAFE<sub>2</sub>O<sub>2</sub>-CA<sub>2</sub>FE<sub>2</sub>O<sub>5</sub>) NA SINTERIZAÇÃO DE MINÉRIO DE FERRO.
- Authors
De Castro, José Adilson; França, Alexandre Bôscaro; Guilherme, Vagner Silva; Sazaki, Yasushi
- Abstract
This paper presents a mathematical model able to predict the influence of soft-melting properties of the blend of raw materials used in the iron ore sintering process in the kinetic formation of calcium ferrite and di-calcium ferrite constituents. The model is based on the simultaneous solution of transport equations of Momentum, energy and chemical species in multiphase multicomponent systems coupled with the chemical reactions kinetics and phase transformations that occur within the sinter bed. The numerical solution is obtained using the finite volume method and the model is validated using monitoring data from an industrial scale sintering plant. After validation, the model was used to predict processing conditions using raw materials with different soft-melting properties. Results indicate that the temperatures of starting soft-melting, shrinkage and melting range are the main parameters to be controlled in order to attain liquid phases formation responsible to confer good mechanical and reducibility properties for the sinter product. In this study was found that raw materials with high soft-melting temperature and wilder temperature of mushy zone could decrease up to 30% the calcium ferrites formation and hence deteriorates the metallurgical properties of the sinter.
- Publication
Tecnologia em Metalurgia, Materiais e Mineração, 2013, Vol 10, Issue 1, p16
- ISSN
2176-1515
- Publication type
Academic Journal
- DOI
10.4322/tmm.2013.003