Gas-Solid Reaction Model for Non-spherical lron Oxide

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    • KANG Heung Won
    • Smelting Reduction Research Team, Research Institute of Industrial Science and Technology(RIST)
    • CHUNG Won Sub
    • Department of Metallurgical Engineering, College of Engineering, Pusan National University
    • MURAYAMA Takeaki
    • Department of Materials Science and Engineering, Faculty of Engineering, Kyushu University


Iron oxide pellets of various shapes are reduced from hematite to magnetite with CO–CO<sub>2</sub> 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.


  • Transactions of the Iron and Steel Institute of Japan  

    Transactions of the Iron and Steel Institute of Japan 38(4), 324-331, 1998-04-15 

    The Iron and Steel Institute of Japan

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