(1. 中南大學(xué) 冶金科學(xué)與工程系， 長(zhǎng)沙 410083;
2. 水口山礦物局科技處， 常寧 421513)
摘 要: 開發(fā)了用NH3-NH4Cl水溶液浸出煉鉛爐渣煙化爐氧化鋅煙灰制取高純鋅的新工藝。Zn的浸出率>96%，浸出液加H2O2后凈化除Sb和As，然后采用加鋅粉兩段逆流除Cu，Cd，Pb，電積過程中電能消耗2500～2700kW·h/t。電鋅含Zn>99.999%，雜質(zhì)元素Cu，Cd，Co，Ni，F(xiàn)e，As，Sb均小于0.0001%，Pb<0.0003%。
關(guān)鍵字: 高純鋅； 氨； 氯化銨； 氧化鋅煙灰
（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
