Effect of Iron Ore Shape on Gaseous Reduction Rate

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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


In order to clarify the effect of particle shape on the gaseous reduction rate of iron ores, iron oxide pellets of various shapes including the long cylindrical- and the disc shape are reduced with 10%CO-90%CO<sub>2</sub> gas mixture. Experimental results show that the reduction rate of the disc-shaped particle is the fastest among all and the long cylindrical particle follows. The experimental data are analyzed by the unreacted-core model for non-spherical particle proposed by authors in the previous paper. According to the analysis, this model is applicable for the non-spherical iron ore of the cylindrical shape within the ratio range of the height to the cylindrical diameter from 0.5 to 2 while the particles of the long cylindrical- and disc-shaped particle out of this range are problematic applying the model. Based on the review of the experimental- and analysis results, the kinetic behavior concept for the non-spherical particle including the long cylindrical- and disc-shaped particles is discussed.


  • Transactions of the Iron and Steel Institute of Japan  

    Transactions of the Iron and Steel Institute of Japan 38(11), 1194-1200, 1998-11-15 

    The Iron and Steel Institute of Japan

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