Numerical Simulation of Thermal and Iron Ore Reduction Conditions in Pre-reduction Shaft Furnace Based on Reducing Gas Composition and Temperature

Based on the principles of mass, momentum and heat transfers between the reducing gas and the iron ore solid, a two-dimensional mathematical model for above two phases is established to study the influences of reducing gas composition on thermal and reduction conditions in pre-reduction shaft furnac...

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Bibliographic Details
Published in:Shanghai jiao tong da xue xue bao 2011-06, Vol.16 (3), p.375-379
Main Author: 徐健 吴胜利 郭新颖 寇明银
Format: Article
Language:English
Subjects:
Architecture
Carbon monoxide
Computer Science
Computer simulation
Computing time
Electrical Engineering
Engineering
Gas composition
Iron
Life Sciences
Materials Science
Mathematical models
Reduction
Shaft furnaces
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Summary:Based on the principles of mass, momentum and heat transfers between the reducing gas and the iron ore solid, a two-dimensional mathematical model for above two phases is established to study the influences of reducing gas composition on thermal and reduction conditions in pre-reduction shaft furnace with the temperature ranging from 1023 to 1223 K. Due to the strong endothermic effect of iron ore reduction participated by hydrogen （H2）, increasing the ratio of carbon monoxide （CO） to H2 enlarges high temperature zone under present calculation conditions, thus improves reduction efficiency inside the furnace. In addition, replacing of the reducing gas with an appropriate proportion of nitrogen （N2） featuring the same temperature has a potential to reduce fuel consumption by as much as 6.5% while the products of similar quality are yielded.
ISSN:1007-1172
1995-8188
DOI:10.1007/s12204-011-1165-9