(1. 江苏大学材料科学与工程学院，镇江 212013；
2. 中南大学冶金与环境学院，长沙 410083)
摘 要: 采用亚氨基二乙酸盐体系循环浸出处理低品位氧化锌矿，浸出剂溶液经浸出-沉锌-沉钙处理后可实现浸出剂再生，再生后的浸出剂溶液按浸出-沉锌-沉钙批处理循环5次，综合考察各过程对再生浸出剂溶液浸锌效果的影响。结果表明：沉锌和沉钙过程可分别将溶液体系中与Ida2-配合的大量Zn2+和Ca2+脱除，达到恢复配体Ida2-活性的目的，再生后浸出剂溶液的浸锌效果与新鲜浸出剂溶液的相当；在循环浸出过程中，锌的平均浸出率为76.90%，理论可溶性锌的平均浸出率为93.8%。
关键字: 氧化锌矿；循环浸出；亚氨基二乙酸；锌冶金
（1. School of Material Science and Engineering, Jiangsu University, Zhengjiang 212013, China;
2. School of Metallurgy and Environment, Central South University, Changsha 410083, China）
Abstract:Low grade zinc oxide ores were treated by cycle leaching in Ida2--H2O system (iminodiacetate aqueous solution). The lixiviant solution was regenerated under a batch process containing the following stages of leaching, Zn precipitation and Ca precipitation. The regenerated lixiviant solution was treated by leaching, Zn precipitaling and Ca precipitating five cycles. And the influences of each process on Zn leaching behavior in the regenerated lixiviant solution were investigated at each stage of all the batch cycles. The results show that the main ions Zn2+ and Ca2+ combined with Ida2- are removed efficiently from leaching liquor with the treatment of Zn precipitation and Ca precipitation, respectively. After two stages precipitation, the activity of Ida2- is recovered in the solution. The resulting of zinc-leaching in the regenerated lixiviant solution are reappeared results in the freshly prepared lixiviant solution. The results of the zinc leaching rates for raw ores and theoretical soluble zinc in raw ores are 76.90% and 93.8% on average.
Key words: zinc oxide ore; cycle leaching; iminodiacetic acid; zinc metallurgy
