锌冶炼中浸渣锌还原浸出行为研究  

Reductive leaching behavior of zinc from neutral leaching residue in zinc smelting

作　　者：闵小波[1,2] 张建强[1] 张纯[1] 王密[1] 周波生 沈忱[1] 

机构地区：[1]中南大学冶金与环境学院,长沙410083 [2]国家重金属污染防治工程技术研究中心,长沙410083

出　　处：《有色金属科学与工程》2015年第5期1-6,共6页Nonferrous Metals Science and Engineering

基　　金：国家高技术研究发展计划(863计划)资助项目(2011AA061001);国家科技惠民计划项目(2012GS430201);湖南省重大科技专项(2012FJ1010)

摘　　要：以湿法炼锌中浸渣为研究对象,通过对比几种不同类型还原剂对中浸渣中铁酸锌浸出效果,筛选铁酸锌高效还原浸出药剂-硫酸肼,并考察硫酸肼浓度、时间、初始酸度、温度及液固比对锌浸出效果的影响.探讨浸出过程中锌物相转变机制.在浸出初始阶段主要是锌的硫酸盐、氧化物、硅酸盐及硫化物等易溶态溶出,而铁酸锌在浸出120 min后大部分溶出.在优化条件下Zn和Fe的浸出率分别达到了95.83%和94.19%.This paper describes the behavior of reductive leaching of zinc from neutral leaching residue in zinc smelting. The effective reductant of hydrazine sulfate was selected by investigating the extraction efficiency of zinc from neutral leaching residue in zinc hydrometallurgical process among various types of reductant. The effects of initial concentration of hydrazine sulfate and sulfuric acid, retention, temperature and liquid-solid ratio on extraction were studied. Furthermore the transformation of zinc phases during the leaching was illustrated. The sulfate, oxide, silicate and sulfide of zinc were extracted fast at first and zinc ferrite was mostly leached out after reaction for 120 min. The leaching efficiencies of Zn and Fe were 95.83 % and 94.19 % respectively in optimum conditions.

关 键 词：锌冶炼 中浸渣 铁酸锌 还原浸出 

分 类 号：TF813[冶金工程—有色金属冶金] TF111.31