(1. 中南大学 冶金科学与工程系， 长沙 410083;
2. 水口山矿物局科技处， 常宁 421513)
摘 要: 开发了用NH3-NH4Cl水溶液浸出炼铅炉渣烟化炉氧化锌烟灰制取高纯锌的新工艺。Zn的浸出率>96%，浸出液加H2O2后净化除Sb和As，然后采用加锌粉两段逆流除Cu，Cd，Pb，电积过程中电能消耗2500～2700kW·h/t。电锌含Zn>99.999%，杂质元素Cu，Cd，Co，Ni，Fe，As，Sb均小于0.0001%，Pb<0.0003%。
关键字: 高纯锌； 氨； 氯化铵； 氧化锌烟灰
（1. Department of Metallurgical Science and Engineering,
Central South University, Changsha 410083, P.R.China;
2. Shuikoushan Mining Bureau, Changning 421513, P.R.China）
Abstract:A new process of using ammonia and ammonium chloride solution to leach zinc oxide fume dusts and electrowinning high-purity zinc was explored successfully. The leaching rate of zinc was more than 96%. The As and Sb in the filtrate were removed by adding H2O2 and others, and Cu, Cd and Pb were removed by adding zinc powder with two-stage countercurrent. During electowinning the electrical energy consumption ranged from 2500 to 2700kW·h/t. The zinc content in the eletrowinned zinc is more than 99.999%, and the contents of mpurities Cu, Cd, Co, Ni, Fe, As, Sb are all lower than 0.0001%, but lead is lower than 0.0003%。
Key words: high-purity zinc; ammonia; ammonium chloride; zinc oxide fume dusts
