摘要
采用热重-质谱联用技术,研究了1023~1373 K条件下H2还原铁矿粉的反应动力学。结果表明,铁氧化物的还原存在分段现象,两个阶段均符合界面化学控速的反应机制,表观反应活化能分别为37.40 kJ/mol和34.97 kJ/mol。由质谱分析数据可以计算得到反应的还原度和还原速率,与热重分析相比,结果基本一致,但存在细节丢失及迟后现象。
The hydrogen reduction kinetics of iron ores was studied by using TG-MS method at the temperature of 1023~1373 K in this paper.The results showed that the reduction of iron oxide was segmental,and both stages were consistent with the reaction mechanism of interfacial chemical controlled speed.The activation energy of two stages were 37.40 kJ/mol and 34.97 kJ/mol,respectively.The reduction degree and reduction rate of the reaction can be calculated by analyzing data with MS.Compared with the results of TG,both results were basically the same,but some details were lost and delayed in mass spectrometry analysis.
作者
李远
胡晓军
Pritesh Garg
毛旭东
李克江
张建良
LI Yuan;HU Xiaojun;Pritesh Garg;MAO Xudong;LI Kejiang;ZHANG Jianliang(State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China;Tata Steel,Mumbai 400060,India;School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China)
出处
《江西冶金》
2020年第2期1-5,共5页
Jiangxi Metallurgy
基金
国家自然科学基金重点资助项目(50834007)。
关键词
铁矿粉
氢还原
动力学
热重-质谱联用
活化能
iron ore
hydrogen reduction
kinetics
TG-MS method
activation energy
