Effect of temperature and reaction path interaction on fluidization reduction kinetics of iron ore powder
作者机构：School of Metallurgical EngineeringAnhui University of TechnologyMa'anshan 243002AnhuiChina
出 版 物：《Journal of Iron and Steel Research International》 (钢铁研究学报（英文版）)
年 卷 期：2024年第31卷第8期
页 面：1840-1849页
核心收录：
学科分类：080602[工学-钢铁冶金] 08[工学] 0806[工学-冶金工程]
基 金：The authors gratefully acknowledge financial support by the National Natural Science Foundation of China-Xinjiang Joint Fund(U2003124) the National Natural Science Foundation of China(No.51974001) the University Outstanding Young Talents Funding Program(No.gxyq2019016)
主 题：Reaction limiting link Gas internal diffusion Interface reaction Apparent activation energy Iron ore powder Reaction pathway Fluidization reduction
摘 要：Due to the instability of FeO at temperatures below 843 K,the fuidization reduction pathway of iron ore powder changes with the reduction ***,the effect of temperature and reaction pathway interaction on the kinetics of fuidization reduction of iron ore powder under low-temperature conditions ranging from 783 to 903 K was investigated to describe the fluidization reduction rate of iron ore powder from three aspects:microstructure change,reaction limiting link,and apparent activation energy of the reaction,exploring their internal *** experimental results revealed that in a temperature range of 783-813 K,the formation of a dense iron layer hindered the internal diffusion of reducing gas,resulting in relatively high gas diffusion *** addition,due to the differences in limiting links and reaction pathways in the intermediate stage of reduction,the apparent activation energy of the reaction *** apparent activation energy of the reaction ranged from 23.36 to 89.13 kJ/mol at temperature ranging from 783 to 813 K,while it ranged from 14.30 to 68.34 kJ/mol at temperature ranging from 873 to 903 K.
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