转底炉直接还原锌浸出渣试验研究  

Experimental Study on Direct Reduction of Zinc Leaching Residue in RHF

作　　者：吴佩佩 WU Peipei(Baowu Group Environmental Resources Technology Co.Ltd.,Shanghai 201900,China)

机构地区：[1]宝武集团环境资源科技有限公司,上海201900

出　　处：《绿色矿冶》2024年第3期50-55,共6页Sustainable Mining and Metallurgy

摘　　要：以锌浸出渣为原料,采用转底炉直接还原-磁选工艺开展试验研究,将锌浸出渣同还原剂、黏结剂按照一定比例压成球团进行还原试验。试验结果显示,在碳氧比1.2、还原温度1250℃、还原时间35 min的条件下,锌浸出渣直接还原后得到金属化球团,锌挥发率超过99%,铅挥发率超过94%,铟挥发率超过79%,铁金属化率超过85%;金属化球团在一段磨矿10 min,磁场强度0.18 T,二段磨矿15 min,磁场强度0.12 T条件下进行磁选,得到铁质量分数87.12%的铁精粉,铁回收率83.04%,试验指标较好,实现了锌浸出渣中铅、锌、铟、铁等有价元素的综合回收利用。Using zinc leaching residue as raw material,experimental research was conducted by RHF direct reduction and magnetic separation process.Press zinc leaching residue into pellets with reducing agents and binders in a certain proportion for reduction experiments.The results showed that under the conditions of carbon oxygen ratio of 1.2,reduction temperature of 1250℃,and reduction time of 35 min,the zinc leaching residue was directly reduced to obtain metallized pellets.The volatilization rate of zinc exceeded 99%,the volatilization rate of lead exceeded 95%,the volatilization rate of indium was more than 79%,and the metallization rate of iron was more than 85%.The metallized pellets were subjected to magnetic separation under the conditions of first grinding for 10 min,magnetic field strength of 0.18 T,second grinding for 15 min,and magnetic field strength of 0.12 T,resulting in iron concentrate powder with an iron grade of 87.12%.The iron recovery rate was 83.04%,and the experimental indicators were good.The comprehensive recovery and utilization of valuable elements such as lead,zinc,indium,and iron in zinc leaching was realized.

关 键 词：锌浸出渣 转底炉 还原 磁选 

分 类 号：TF813[冶金工程—有色金属冶金]