铁矿微粉低温快速氢还原实验研究  

Experimental Studies on Quick Reduction of Fine Iron Ore with Hydrogen at Low Temperatures

作　　者：王道净[1] 陈华[1] 李秋菊[1] 洪新[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200072

出　　处：《过程工程学报》2007年第4期706-711,共6页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:50474081)

摘　　要：通过实验进行了铁矿微粉在输送过程中低温(180～570℃)、低压(<0.2MPa)条件下用氢预还原的可行性研究.分别考虑了反应温度、矿粉粒径、固气比、反应时间等参数对矿粉还原率的影响.结果表明,粒径为61.7μm的矿粉在加热温度570℃、固气比0.22g/L、反应时间40s时,还原率可达39.2%.对还原样品粉末进行X射线衍射分析表明,铁矿粉中的Fe2O3已还原为Fe3O4并开始出现金属铁.Based on the research work previously, a new technology of continuous prereduction of fine iron ore with hydrogen at low temperatures （180-570 ℃） and low pressure （〈0.2 MPa） was introduced, and its feasibility was also studied by experiments in this work. The effects of reaction temperature, particle size, ratio of solid to gas and reaction time on the reduction rate of fine iron ore were examined respectively. The experimental result showed that a reduction rate of 39.2% was achieved while the fine iron ore with averaged particle size of 61.7 μm was heated up to 570℃ and remained for 40 s in the reactor with a ratio of solid to gas of 0.22 g/L. XRD analysis of the reduction product indicated that Fe2O3 was reduced into Fe3O4 and Fe.

关 键 词：铁矿微粉 低温氢还原 移动床 

分 类 号：TF552[冶金工程—钢铁冶金]