氧化锌矿氨浸液电积锌工艺研究  

Study of Zinc Electrowinning of Ammonia Leaching Solution from Zinc Oxide Ore

作　　者：桑世华[1,2] 王渊[1,2] 胡咏霞[1,2] 唐明林[1] 

机构地区：[1]成都理工大学材料与化学化工学院,成都610059 [2]矿产资源化学四川省高校重点实验室,成都610059

出　　处：《有色金属（冶炼部分）》2014年第8期1-4,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(41373062);四川省科技支撑计划项目(2014GZ0189);高等学校博士学科点专项科研基金项目(20125122110015);矿产资源化学四川省高校重点实验室开放基金项目(kzh201101)

摘　　要：研究了氨水体系浸出氧化锌矿制取金属锌的新工艺,并考察了温度、电流、异极距、锌质量浓度对锌电流效率及槽电压的影响及添加剂对锌板质量的影响.结果表明,氧化锌中的锌浸出率达98％,在浸矿前用石灰水对矿粉进行预处理可以提高氨的有效利用率.最佳电积工艺条件为：温度20～40℃、电流2.5A、异极距3.5 cm,明胶、TP、TNB加入量分别为0.1 g/L、0.1 g/L、10 mg/L,槽电压3.3V.电流效率94.33％,每吨锌耗电2 869 kWh,锌品位达99.58％.A new process to produce zinc from ammonia leaching solution of zinc oxide ores was studied.The effects of temperature,electricity,electrode space,and zinc mass concentration on current efficiency,and the influence of additives on quality of zinc board were investigated.The results show that zinc leaching rate in zinc oxide is 98％.The effective availability of ammonia is improved by pretreating limewash before leaching.The optimum electrowinning conditions include temperature of 20 ～ 40 ℃,electric current of 2.5 A,electrode space of 3.5 cm,dosage of gelatin,TP and TNB of 0.1 g/L,0.1 g/L and 10 mg/L respectively,and cell voltage of 3.3 V.The electrolytic efficiency is 94.33％,power consumption for one tonnage zinc is 2 869 kWh,and zinc grade of electrolyzing zinc is 99.58％.

关 键 词：氨浸 锌氨络合物 浸出 净化 电积 

分 类 号：TF813[冶金工程—有色金属冶金]