硫酸渣煤基直接还原焙烧制备直接还原铁  

Study on Preparation of Direct Reduction of Iron from Pyrite Cinder by Coal-based Direct Reduction Roasting

作　　者：蒋曼[1] 李俊达 张乐[2] 樊洁 于福顺 董风芝[1] JIANG Man;LI Junda;ZHANG Le;FAN Jie;YU Fushun;DONG Fengzhi(School of Resources and Environmental Engineering,Shangdong University of Technology,Zibo 255000,China;Scientific and Technicial Information Institute of Zibo,Zibo 255000,China;Shen Kan Qinhuangdao General Engineering Design&Research Institute Corporation,Qinhuangdao 066004,China)

机构地区：[1]山东理工大学资源与环境工程学院,山东淄博255000 [2]淄博市科学技术情报研究所,山东淄博255000 [3]中冶沈勘秦皇岛工程设计研究总院有限公司,河北秦皇岛066004

出　　处：《矿产保护与利用》2019年第3期58-62,共5页Conservation and Utilization of Mineral Resources

基　　金：国家自然科学基金青年科学基金项目(51804188);山东省自然科学基金面上项目(ZR2016EEM19);山东省自然科学基金博士基金项目(ZR2018BEE015)

摘　　要：采用煤基直接还原焙烧—磁选工艺对硫酸渣进行焙烧回收铁的试验研究,考察了还原剂、助熔剂、焙烧温度、焙烧时间等因素对焙烧效果的影响。结果表明:还原剂用量为30%,助熔剂CaO和Na2SO4的用量分别为15%和20%,在焙烧温度为950℃条件下焙烧50 min,最终得到直接还原铁的TFe品位为91.89%,TFe的回收率为82.26%,S残余含量0.03%。该直接还原铁可用作电炉炼钢原料。试验工艺对硫酸渣的综合利用和环境保护有着重要的经济和实用价值。In this paper,the process of coal-based direct reduction roasting and magnetic separation was used to recover iron by pyrite cinder roasting.The effects of reducing agent,fluxing agent,temperature and time on the roasting were investigated.The results showed that the iron grade of direct reduced iron of 91.89%,the recovery rate of iron of 82.26%,and the residual content of S of 0.03%were obtained by the amount of reducing agent of 30%,the amount of flux CaO and Na2SO4 of 15%and 20%,respectively,and roasting for 50 min at a roasting temperature of 950℃.The direct reduced iron can be used as raw material for electric steelmaking.The experimental results have important economic and practical value for comprehensive utilization of pyrite cinder and environmental protection.

关 键 词：硫酸渣 煤基还原焙烧 磁选 

分 类 号：TD925.7[矿业工程—选矿] X754[环境科学与工程—环境工程]