Combustion Rate of Coke in Quasi-particle at Iron Ore Sintering Process

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  • Ohno Ko-ichiro
    Department of Materials Science and Engineering, Faculty of Engineering, Kyushu University
  • Noda Keigo
    Graduated Student, Department of Materials Process Engineering, Graduate School of Engineering, Kyushu University
  • Nishioka Koki
    Department of Materials Process Engineering, Graduate School of Engineering, Kyushu University
  • Maeda Takayuki
    Department of Materials Science and Engineering, Faculty of Engineering, Kyushu University
  • Shimizu Masakata
    Department of Materials Science and Engineering, Faculty of Engineering, Kyushu University

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Other Title
  • 焼結プロセスにおける擬似粒子中コークスの燃焼速度
  • ショウケツ プロセス ニ オケル ギジ リュウシ チュウ コークス ノ ネンショウ ソクド

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Abstract

Temperature distribution in layer of the iron ore sintering process is one of the most important factors to decide the sinter quality. To estimate the temperature distribution in sinter layer needs knowledge of coke combustion rate. The purpose of this study is to clarify that coke combustion rate in the fine layer of the quasi-particle with considerations about void ratio and liquid formation. The following results were obtained. Interface chemical reaction rate constant, kc, was independent on the mixing ratio of coke. The higher mixing ratio of coke made the larger effective diffusion coefficient of oxygen, because the higher mixing ratio of coke made the higher void ratio in the sample after coke combustion. The coke combustion rate became small with increasing of liquid formation amount, because liquid phase in quasi-particle prevented oxygen diffusion in there.

Journal

  • Tetsu-to-Hagane

    Tetsu-to-Hagane 101 (3), 184-189, 2015

    The Iron and Steel Institute of Japan

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