重庆大学学报Issue(5)：1-10,10.DOI:10.11835/j.issn.1000-582X.2015.05.001
矿粉粒度及反应温度对高磷鲕状赤铁矿制备碳化铁的影响
Effect of hematite particle size and reaction temperature on the preparation of iron carbide from high phosphorus oolitic hematite
摘要
Abstract
In order to use high phosphorus oolitic hematite as a new raw material for steelmaking,the particle size of high phosphorus oolitic hematite and reaction temperature on the preparation of iron carbide are studied in H2-CH4 atmosphere.The weight loss of sample in reduction process,phase composition of high phosphorus oolitic hematite and carburization products are investigated by means of thermogravimetric method,SEM-EDS and XRD.The SEM-EDS and XRD analysis show that the main compositions of high phosphorus oolitic iron ore are hematite and quartz,and the main microstructure is oolitic clusters with the zonal distribution of hematite and apatite.According to the experiment results,the reaction activation energy of high phosphorus oolitic hematite with size in the range of 120~160 mesh is the lowest.In reduction step,the reaction activation energy is 44.95 kJ/mol,and the apparent reaction activation energy is 9.71 kJ/mol in carburization step.From the perspective of reaction rate,the optimum temperature for preparing iron carbide from high phosphorus oolitic hematite is 1 023 K and the optimum particle size is 120~160 mesh.Generally,compared with iron ore particle size,temperature has much more influence on the iron carbide formation from high phosphorus oolitic hematite.关键词
高磷鲕状赤铁矿/还原/碳化铁/粒度Key words
high phosphorus oolitic hematite/reduction/iron carbide/particle size分类
矿业与冶金引用本文复制引用
李光强,杨剑,王恒辉,马江华..矿粉粒度及反应温度对高磷鲕状赤铁矿制备碳化铁的影响[J].重庆大学学报,2015,(5):1-10,10.基金项目
国家自然科学基金（51374159）；北京科技大学钢铁冶金新技术国家重点实验室开放基金（KF12-06）；武汉科技大学大学生创新基金（14ZRA002）。Supported by National Natural Science Foundation of China （51374159），the Open-end Fund of State Key Laboratory of Advanced Metallurgy of Beijing University of Science and Technology （KF12-06）and the College Student Innovation Fund of Wuhan University of Science and Technology （14ZRA002）． （）
