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›› 2014, Vol. 14 ›› Issue (5): 829-834.

• 过程与工艺 • Previous Articles     Next Articles

Kinetics and Stratification of Hydrogen Reduction of Block Hematite

FANG Fei YANG Xiao-bo ZHOU Guo-zhi   

  1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing College of Materials Science and Engineering, Shanghai University
  • Received:2014-11-13 Revised:1900-01-01 Online:2014-10-20 Published:2014-10-20

氢还原块状Fe2O3的动力学及分层现象

方飞 胡晓军 杨晓波 周国治   

  1. 北京科技大学钢铁冶金新技术国家重点实验室 北京科技大学理化系 北京科技大学钢铁冶金新技术国家重点实验室 上海大学材料学院
  • 通讯作者: 胡晓军

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Abstract: The hydrogen reduction process of block hematite in 1073~1273 K was studied by using EPMA and metallographic analysis. The results showed that there were a staged character and stratification in the hydrogen reduction process of block hematite. The mechanism of the staged character and stratification was discussed based on the results of XRD and EPMA. Under the experimental conditions in this work, the reduction rate was controlled by gas diffusion and interfacial chemical reaction, and the apparent activation energy was 27.0±5.9 kJ/mol.

Key words: hematite, hydrogen reduction, kinetics, stratification

摘要： 通过EPMA、金相等分析手段，对块状Fe2O3在1073~1273 K的氢还原过程进行了研究. 结果表明，氢还原块状Fe2O3的过程具有阶段性并具有明显的分层现象，并根据XRD及EPMA检测结果分析了中间产物层的形成机理. 本实验条件下，反应过程处于气体内扩散与界面化学反应控速的阶段，反应的表观活化能为27.0±5.9 kJ/mol.

关键词: Fe2O3, 氢还原, 动力学, 分层现象

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