Gas-Solid Reaction Model for Non-spherical Iron Oxide

Iron oxide pellets of various shapes are reduced from hematite to magnetite with CO–CO2 gas mixture to investigate the shape effect on the gaseous reduction rate of an iron oxide pellet. Based on the observation result of the section of partly converted pellets, a model of the mixed-control kinetics...

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Bibliographic Details
Published inISIJ International Vol. 38; no. 4; pp. 324 - 331
Main Authors Kang, Heung Won, Chung, Won Sub, Murayama, Takeaki, Ono, Yoichi
Format Journal Article
LanguageEnglish
Published Tokyo The Iron and Steel Institute of Japan 01.01.1998
Iron and Steel Institute of Japan
Subjects
Applied sciences
Exact sciences and technology
Iron and steel making
iron oxide
Ironmaking in blast furnace
Metals. Metallurgy
mixed-control kinetics
non-spherical radius
Production of metals
reduction
unreacted-core model
Hematite
Iron oxide
Gas mixture
Gas solid reaction
Carbon dioxide
Theoretical study
Iron
Review
Experimental study
Modeling
Chemical reaction kinetics
Chemical model
Chemical reduction
Magnetite
Iron steel industry
Carbon monoxide
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Summary:Iron oxide pellets of various shapes are reduced from hematite to magnetite with CO–CO2 gas mixture to investigate the shape effect on the gaseous reduction rate of an iron oxide pellet. Based on the observation result of the section of partly converted pellets, a model of the mixed-control kinetics for a non-spherical iron oxide is proposed. A determination method of the rate parameters included in this model is presented. Applicability of this model is reviewed comparing to one of existing models for non-spherical particle. For derivation of the mixed-control rate equation for a non-spherical iron oxide, the concept of non-spherical radius is introduced.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0915-1559
1347-5460
DOI:10.2355/isijinternational.38.324