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<p>This study employed coal-based hydrogen–carbon coupling reduction technology to investigate the reduction of iron-containing phases in iron-rich nickel slag. The reaction order for reducing FeO to Fe was calculated using the differential method. Subsequently, the reaction order (<i>n</i>) was validated through reduction experiments on iron-rich nickel slag. The results indicated that the reaction order decreased with increasing temperature, while the reaction rate constant increased. Specifically, when the reduction temperature was raised from 1200°C to 1300°C, the reaction order decreased from 1.63 to 1.33, while the reaction rate constant increased from 0.031 to 0.165. The apparent activation energy for the reduction process was 40.35&#xa0;kJ&#xa0;mol<sup>− 1</sup>.</p>

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Study on Reaction Order of Coal-Based Hydrogen-Carbon Coupling Reduction of Iron-Rich Nickel Slag

  • 期刊论文

  • 发表日期：

    2026年1月12日

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  • Jinlin Li,
  • Bin Li,
  • Ting Zhang,
  • Yingying Shen,
  • Rong Wang,
  • Bingang Lu,
  • Xueyan Du

摘要

This study employed coal-based hydrogen–carbon coupling reduction technology to investigate the reduction of iron-containing phases in iron-rich nickel slag. The reaction order for reducing FeO to Fe was calculated using the differential method. Subsequently, the reaction order (n) was validated through reduction experiments on iron-rich nickel slag. The results indicated that the reaction order decreased with increasing temperature, while the reaction rate constant increased. Specifically, when the reduction temperature was raised from 1200°C to 1300°C, the reaction order decreased from 1.63 to 1.33, while the reaction rate constant increased from 0.031 to 0.165. The apparent activation energy for the reduction process was 40.35 kJ mol− 1.