东北大学学报:自然科学版 ›› 2018, Vol. 39 ›› Issue (12): 1759-1763.DOI: 10.12068/j.issn.1005-3026.2018.12.017

• 资源与土木工程 • 上一篇    下一篇

磁化焙烧冷却过程中磁铁矿氧化动力学

孙永升, 曹越, 韩跃新, 李艳军   

  1. (东北大学 资源与土木工程学院, 辽宁 沈阳110819)
  • 收稿日期:2017-08-29 修回日期:2017-08-29 出版日期:2018-12-15 发布日期:2018-12-19
  • 通讯作者: 孙永升
  • 作者简介:冯明杰(1971-), 男, 河南禹州人, 东北大学副教授; 王恩刚(1962-), 男, 辽宁沈阳人, 东北大学教授,博士生导师.孙永升(1986-),男,山东济南人,东北大学副教授,博士; 韩跃新(1961-),男,内蒙古赤峰人,东北大学教授,博士生导师; 李艳军(1972-)男,内蒙古赤峰人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51171041).霍英东教育基金会资助项目(161045); 国家自然科学基金资助项目(51674064); 中央高校基本科研业务费专项资金资助项目(N160104007).

Oxidation Kinetics of Magnetite During the Cooling Process of Magnetization Roasting

SUN Yong-sheng, CAO Yue, HAN Yue-xin, LI Yan-jun   

  1. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China.
  • Received:2017-08-29 Revised:2017-08-29 Online:2018-12-15 Published:2018-12-19
  • Contact: SUN Yong-sheng
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摘要: 针对磁化焙烧冷却过程开展了研究,考察了磁铁矿氧化反应分数和反应速率的变化规律,并采用模型匹配法进行了氧化动力学分析.结果表明:磁化焙烧冷却过程中,氧化温度对反应分数和反应速率均有着显著的影响;相同氧化时间下,反应分数和反应速率随氧化温度的升高而增加;不同氧化温度下,反应分数和反应速率随反应时间变化呈现出相同的变化规律;磁铁矿氧化过程动力学机理函数为n=4的Avrami-Erofee方程,氧化反应的表观活化能为135.2kJ·mol,指前因子为6.19×1010min-1.

关键词: 磁化焙烧, 等温氧化, 反应分数, 反应速率, 动力学

Abstract: The cooling process of magnetization roasting has been investigated. The variation of magnetite oxidation reaction fraction and rate was observed, and the oxidation kinetics was analyzed using model matching method. The results indicated that oxidation temperature had a significant effect on the reaction fraction and rate. At the same oxidation time, the reaction fraction and rate increased as temperature increasing. The curves of reaction fraction and rate under different temperatures presented the similar variation with increasing reaction time. The mechanism function of isothermal oxidation of magnetite was determined to be Avrami-Erofee equation with n=4. The apparent activation energy and pre-exponential factor were 135.2kJ·mol and 6.19×1010min-1, respectively.

Key words: magnetization roasting, isothermal oxidation, reaction fraction, reaction rate, kinetics

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