Carburization Rate into Solid Iron at CO-CO<SUB>2</SUB> Atmosphere

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  • CO-CO<SUB>2</SUB>雰囲気における固体鉄への浸炭速度
  • CO-CO2雰囲気における固体鉄への浸炭速度
  • CO CO2 フンイキ ニ オケル コタイ テツ エ ノ シンタン ソクド

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Abstract

In order to construct a mathematical model of a moving bed type ironmaking process using iron scrap as the burden materials, the carburization rate from CO-CO2 gas mixture into solid iron was studied experimentally and theoretically.<BR>The mass change of an iron sample during carburization was measured by a thermo-balance over a temperature range of 973 to 1423K and CO concentration of 70 to 100%. In CO atmosphere, carburization rate increased significantly with temperature over 973K, however it decreased over 1273K. In CO-CO2 atmosphere, carburization scarcely proceeded over 10% CO2 concentration at 1273K.<BR>The carburization rate equation was derived by considering CO dissociation and CO2 formation as two elemental processes. Rate constants were obtained from experimental data. The rate equation obtained agreed well with experimental results.

Journal

  • Tetsu-to-Hagane

    Tetsu-to-Hagane 83 (5), 299-304, 1997

    The Iron and Steel Institute of Japan

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