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Special Topics & Reviews in Porous Media: An International Journal
ESCI SJR: 0.376 SNIP: 0.466 CiteScore™: 0.83

ISSN Imprimer: 2151-4798
ISSN En ligne: 2151-562X

Special Topics & Reviews in Porous Media: An International Journal

DOI: 10.1615/SpecialTopicsRevPorousMedia.v4.i4.20
pages 299-313

TWO-DIMENSIONAL AXISYMMETRIC MODELING OF COMBUSTION IN AN IRON ORE SINTERING BED

Saeed Sadeghi Lafmejani
Department of Mechanical Engineering, Isfahan University of Technology, Isfahan, Iran
Mohsen Davazdah Emami
Department of Mechanical Engineering, Isfahan University of Technology, 84156-83111, Isfahan, Iran
Masoud Panjepour
Department of Materials Engineering, Isfahan University of Technology, 84156-83111, Isfahan, Iran
Salman Sohrabi
Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran

RÉSUMÉ

A twodimensional model, based on conservation of mass, momentum and energy equations, is represented in this paper in which the coke combustion process, for iron ore sintering in a packed bed, is simulated numerically. The aforementioned packed bed consists of iron ore, coke, limestone and moisture. The main objective of iron ore sintering is producing resistant agglomerates which can be used in blast furnaces. For this purpose, the sinter mixture is partially melted in high temperature and finally molten is allowed to cool. The molten production and subsequently, the solidification process are totally dependent on composition and components of mixture. Changes in bed porosity, caused by fuel combustion, calcinations and moisture evaporation which directly affect bed permeability and gas diffusion, are also considered in the modeling procedure. Mass, momentum, and energy transfer equations of species are solved numerically by using a computational fluid dynamics code in a discrete solving domain. Modeling of iron ore sintering has complex and various features like coke combustion, complicated physical changes of solid phase particles and different modes of heat transfer, for example convection, conduction and radiation. Here in this twodimensional modeling, various reactions are considered to be involved in this process, e.g. distillation, coke combustion and limestone decomposition. Computational results have been analyzed and compared with lab test data of sintering bed. The achieved temperature distribution diagrams in this investigation are truly an apparent indicator of good consistency between our computational results and the experimental data.


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