直流电协同锌板置换提镉的工艺实践  

Technology practice of cadmium extraction by replacement of zinc plate synergized with direct current

作　　者：张家玮[1] 王夏阳[1] 何静[1] 

机构地区：[1]中南大学冶金与环境学院,长沙410083

出　　处：《有色金属科学与工程》2015年第5期22-26,96,共6页Nonferrous Metals Science and Engineering

基　　金：国家自然科学基金资助项目(51174240);湖南省科技重大专项(2012FJ1010)

摘　　要：为解决现有提镉工艺的原料消耗大、提镉率低、环境污染严重的问题,提出在直流电协同作用下从湿法炼锌铜镉渣中提镉的工艺.在电流密度、温度、极板间距以及溶液p H值不同的条件下进行锌板置换提镉的试验,对反应过程中锌、镉含量以及酸度随反应时间的变化情况进行实时监测及数据分析,结果表明:随着反应的进行,锌离子浓度有所提高,溶液酸度变化不大,各槽提镉率均达到96%以上;对产品海绵镉进行形貌表征,发现其具有枝晶组织;本工艺降低生产成本,降低对环境的危害,对实际生产具有指导意义.To solve the problems in the traditional cadmium extraction technology, including high raw material consumption, high environmental pollution and low cadmium extraction rate, a new cadmium extraction process from copper-cadmium slag in zinc hydrometallurgy by replacement of zinc plate synergized with direct current is proposed. The experiment is conducted under different reaction conditions including current density, temperature, polar distance and pH value. The changes of zinc, cadmium content and acidity with time are monitored and analyzed momentarily. The results show that the concentration of zinc ion increases and the pH value of the solution changes slightly with the reaction time. The production sponge cadmium possesses dendrite structure by morphology analysis. This new process has a certain guiding significance to cadmium production by reducing production cost and environmental pollution.

关 键 词：锌板置换 海绵镉 提镉率 协同作用 

分 类 号：TF803.2[冶金工程—有色金属冶金] TF819.2