东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2003, Vol. 24 ›› Issue (9): 828-831.DOI: -

• 论著 • 上一篇    下一篇

Fe_3C生成机理及物相分析

惠银安;王德永;姜茂发   

  1. 东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院 辽宁沈阳　110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2003-09-15 发布日期:2013-06-24
  • 通讯作者: Wang, D.-Y.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(59874010)·

Phase analysis and production mechanism of iron carbide

Hui, Yin-An (1); Wang, De-Yong (1); Jiang, Mao-Fa (1)   

  1. (1) Sch. of Mat. and Metall., Northeastern Univ., Shenyang 110004, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2003-09-15 Published:2013-06-24
  • Contact: Wang, D.-Y.
  • About author:-
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摘要： 在热力学计算的基础上,探讨了铁矿石在流化床内还原生产Fe3C的生成机理和途径·结果表明,700℃时铁氧化物还原符合逐级还原理论,碳化铁由生成的铁经CO渗碳得到;反应温度介于586℃和628℃之间,碳化铁主要由反应产生的FeO与CO反应得到,另一部分碳化铁由矿石中还原出的金属铁与CO反应得到;温度低于586℃时,产物中的碳化铁主要由Fe3O4与CO反应得到,产物中磁铁矿含量较高·同时利用穆斯堡尔谱和X衍射分析手段验证了产物中碳化铁的存在,所有这些研究成果为Fe3C的工业化生产提供理论基础·

关键词: 碳化铁, 铁矿石还原, 流化床, 反应机理, 逐级还原, 物相分析

Abstract: Based on thermodynamic analysis, the production mechanism and path of iron carbide deoxidized from iron ore in fluid bed were studied. The results show that (1) ferric oxides are deoxidized according to the theory of Gradual Deoxidizing at 700°C, and iron carbide comes from the infiltrating reaction of CO; (2) iron carbide comes mainly from the reaction of FeO to CO with partly from the reaction of metallic Fe deoxidized from iron ore to CO at 586°C to 628°C; (3) when the temperature is lower than 586°C, iron carbide in product sample comes mainly from the reaction of Fe3O4 to CO, and the content of magnetite is higher correspondingly. By means of Mossbauer spectrum and X-ray diffraction, the phase analysis we made verified that iron carbide exits in product sample. All the results here will lay a theoretic foundation for industrial production of iron carbide.

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