高磷鲕状赤铁矿深度还原过程中磷在金属相富集热力学研究  

Thermodynamic Study of Phosphorus in Metallic Phase During Coal-based Reduction of High Phosphorus Oolitic Hematite Ore

作　　者：李国峰 韩跃新[2] 高鹏[2] 刘立伟 白丽梅 Li Guofeng;Han Yuexin;Gao Peng;Liu Liwei;Bai limei(College of Mining Engineering, North China University of Science and Technology, Tangshan, Hebei, China;College of Resources and Civil Engineering, Northeastern University, Shenyang, Liaoning, China)

机构地区：[1]华北理工大学矿业工程学院,河北唐山063210 [2]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《矿产综合利用》2019年第2期152-156,共5页Multipurpose Utilization of Mineral Resources

基　　金：国家自然科学基金项目(51134002);河北省科技计划项目(16211506)

摘　　要：以某铁品位42.21%、磷含量1.31%的高磷鲕状赤铁矿为研究对象,考察了深度还原过程中磷在金属相中的富集特性。热力学分析显示,磷以固溶体或FexP的形式存在于金属相中。采用HSC Chemistry 6.0软件对磷在金属相富集进行了模拟计算,升高还原温度或增大C/O摩尔比对金属相中磷含量的提高有利,SiO_2、Al_2O_3和SiO_2-Al_2O_3等杂质成分参与还原反应可促进磷在金属相富集。对模拟结果进行了试验验证,结果表明模拟计算对磷在金属相富集的趋势具有一定的预测作用。在还原时间50 min、还原温度1548 K、C/O摩尔比2.5的条件下,金属相中磷的品位和回收率分别为2.38%和74.85%。A high phosphorus oolitic hematite ore containing 42.21% total iron and 1.31% phosphorus was taken as research object, and the enrichment characteristics of phosphorus in metallic phase were investigated.Thermodynamic analysis showed that the phosphorus could distribute in metallic phase in the form of solid solution and FexP compound. The enrichment of phosphorus in metallic phase was analog calculated using HSC Chemistry 6.0. A higher reduction temperature or C/O molar ratio resulted in a high phosphorus content of the metallic phase. The impurities, such as SiO2, Al2O3, or SiO2-Al2O3, were also favorable for the enrichment of phosphorus in metallic phase. The analog results were verified by the coal-based reduction of high phosphorus oolitic hematite ore, and the results showed that the analog calculation could provide certain predicative for the trend of the phosphorus enrichment in metallic phase. The phosphorus of metallic phase reached 2.33% with a recovery of 66.95% when the high phosphorus oolitic hematite ore was reduced at 1523 K with a C/O molar ratio of 2.5 and after 60 min reduction.

关 键 词：高磷鲕状赤铁矿 深度还原 热力学 磷 

分 类 号：TD989[矿业工程—选矿]