2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 6: Yagi Intl. Symp. / Metals & Alloys Processing

Editors:Kongoli F, Akiyama T, Nogami H, Saito K, Fujibayashi A
Publisher:Flogen Star OUTREACH
Publication Year:2016
Pages:480 pages
ISBN:978-1-987820-46-1
ISSN:2291-1227 (Metals and Materials Processing in a Clean Environment Series)
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    Numerical Evaluation Of The Effects Of Soft-Melting Properties On The Kinetic Calcium Ferrites Formation In The Compact Sintering Machine

    Jose Adilson de Castro1; Aline Aguiar Lopes2; Fernando Tadeu Pereira de Medeiros3; Alexandre Santos Francisco3; Flavia Vitoretti1; Marcos de Campos1;
    1UFF - FEDERAL FLUMINENSE UNIVERSITY, Volta Redonda, Brazil; 2UFF/CSN, Volta Redonda, Brazil; 3UFF, Volta Redonda, Brazil;
    Type of Paper: Regular
    Id Paper: 185
    Topic: 3

    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 for conferring 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.

    Cite this article as:

    de Castro J, Lopes A, de Medeiros F, Santos Francisco A, Vitoretti F, de Campos M. Numerical Evaluation Of The Effects Of Soft-Melting Properties On The Kinetic Calcium Ferrites Formation In The Compact Sintering Machine. In: Kongoli F, Akiyama T, Nogami H, Saito K, Fujibayashi A, editors. Sustainable Industrial Processing Summit SIPS 2016 Volume 6: Yagi Intl. Symp. / Metals & Alloys Processing. Volume 6. Montreal(Canada): FLOGEN Star Outreach. 2016. p. 440-441.