化学工程2026，Vol.54Issue(4)：66-71,6.DOI:10.3969/j.issn.1005-9954.2026.04.011
氢气还原不同粒径氧化铁的动力学
Reaction kinetics of hydrogen reduction of iron oxides with different particle sizes
摘要
Abstract
The reaction kinetic process of hydrogen reducing iron oxides was investigated based on the fundamental reduction reaction of iron oxides by hydrogen at high temperatures,and the advantages of hydrogen as a reducing agent in the production of metallic iron were explored.Iron oxide reduction experiments were conducted under hydrogen atmosphere at different temperatures,and the effects of particle size and hydrogen volume fraction on the kinetic parameters of the reduction reaction were studied.The experimental results indicate that the reduction rate during different stages of iron oxide reduction is influenced by hydrogen volume fraction,oxide particle size and temperature.For iron oxide with particle sizes of 5 μm and 30 μm within the temperature range of 500-900 ℃,the reduction process can be divided into three stages based on the degree of reduction.In the first stage,the reduction of Fe2O3 to Fe3O4 follows the chemical reaction control model.The activation energy decreases gradually with increasing hydrogen volume fraction.In the second stage,the reduction of Fe3O4 to FeO conforms to the random nucleation and subsequent growth model.For iron oxide with a particle size of 30 μm,the activation energy increases sharply with decreasing hydrogen volume fraction.In the third stage,the reduction of FeO to Fe follows the gas-phase three-dimensional diffusion model,and the activation energy generally decreases with increasing hydrogen volume fraction.Compared to iron oxide with a particle size of 30 μm,the 5 μm particle size exhibits faster reduction rate and lower activation energy when the hydrogen volume fraction exceeds 50％.关键词
反应动力学/氢/还原/氧化铁/金属冶炼Key words
reaction kinetics/hydrogen/reduction/iron oxide/metal smelting分类
矿业与冶金引用本文复制引用
赵泽一,吴吉喆,李印辉,陶春珲,唐羽丰,唐寒冰,刘龙波,岳晨午,马和平..氢气还原不同粒径氧化铁的动力学[J].化学工程,2026,54(4):66-71,6.基金项目
国家自然科学基金资助项目(22178280) （22178280）
陕西省科技厅项目(2023KXJ-058,2024JC-JCQN-20,2024JC-YBMS-097) （2023KXJ-058,2024JC-JCQN-20,2024JC-YBMS-097）
