东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (2): 282-285.DOI: 10.12068/j.issn.1005-3026.2014.02.029

• 资源与土木工程 • 上一篇    下一篇

Fe2O3-SiO2体系深度还原过程动力学

王泽红，李国峰，高鹏，韩跃新   

  1. (东北大学 资源与土木工程学院， 辽宁 沈阳110819)
  • 收稿日期:2013-04-22 修回日期:2013-04-22 出版日期:2014-02-15 发布日期:2013-11-22
  • 通讯作者: 王泽红
  • 作者简介:王泽红(1969-)，男，山西永济人，东北大学副教授，博士.
  • 基金资助:
    国家自然科学基金资助项目(51134002，51074036).

Kinetics During Coalbased Reduction Process of Fe2O3SiO2 System

WANG Zehong， LI Guofeng， GAO Peng， HAN Yuexin   

  1. School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China.
  • Received:2013-04-22 Revised:2013-04-22 Online:2014-02-15 Published:2013-11-22
  • Contact: WANG Zehong
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摘要： 采用等温法和非等温法，分析了Fe2O3-SiO2体系深度还原过程的动力学.等温法试验表明，在一定范围内升高还原温度，有利于焦炭气化反应的进行，进而增加反应的还原度和还原速率.等温法确定的Fe2O3-SiO2体系深度还原反应符合Avrami-Erofeev模型，金属铁颗粒的成核及长大是还原过程的限制性环节，反应的表观活化能为23533kJ/mol，指前因子为322×107min-1.非等温法试验表明，该体系深度还原反应在温度达到400℃之后开始发生，700℃之后还原反应速度加快，最终反应趋于平衡.非等温法确定的主要反应阶段的表观活化能为23866kJ/mol，指前因子为104×107min-1.

关键词: 深度还原, Fe2O3-SiO2体系, 等温法, 非等温法, 动力学

Abstract: The kinetics during coalbased reduction of Fe2O3SiO2 system was studied isothermally and nonisothermally. The isothermal experiments showed that reduction degree and reduction rate increased with the rise of reduction temperature in a certain range， which was beneficial to the gasification of coal. The coalbased reduction reaction of Fe2O3SiO2 system accorded with AvramiErofeev kinetic model， and the reaction was controlled by the process of nucleation and development of iron particles. The apparent activation energy and preexponential of isothermal coalbased reduction process were 23533kJ/mol and 322×107min-1 respectively. The nonisothermal experiments showed that coalbased reduction reaction started at 400℃ and accelerated after 700℃ then reached equilibrium eventually. The apparent activation energy and preexponential of main reaction stage were 23866kJ/mol and 104×107min-1 determined by nonisothermal method.

Key words: coalbased reduction, Fe2O3SiO2 system, isothermal method, nonisothermal method, kinetics

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