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近年来,我国锌电解工厂逐步扩大了锌原料的范围,如回转窑挥发得到的氧化锌,铅锌鼓风炉熔炼的烟尘及铅锌工业副产物。在浸出这些物料时,得到的溶液含钴、镍量及其它杂质量都较高,镍的含量往往超过5mg/l的极限含量,在流程中随使用的药剂带入的钴、镍量也是一个不可忽视的数值。例如我矿的湿法流程中随原料来的钴、镍量(循环积累量)镍小于3mg/l,钴小于2mg/l,但81年11月～12月份每天随硫酸铜带入的镍量为1.2～1.5公斤。使电解液含镍增高到5.5～6mg/l,Ni 2～3mg/l,严重地威胁着生产的正常进行。钴和镍是湿法炼锌浸出液中最难除去的杂质。常用的净化方法有两种:一种是电化
In recent years, China’s zinc electrolysis plant has gradually expanded the scope of zinc raw materials, such as zinc oxide obtained from the rotary kiln volatilization, dust smelting from lead-zinc blast furnaces, and industrial byproducts of lead and zinc. In leaching of these materials, the resulting solution contains a higher amount of cobalt, nickel and other impurities, the nickel content often exceeds the limit of 5 mg / l, and the amount of nickel added to the process with the used agent is also one Can not ignore the value. For example, with the raw materials of cobalt and nickel in the wet process of mine, the amount of nickel (circulating accumulation) of nickel is less than 3mg / l and the amount of cobalt is less than 2mg / l, but the amount of nickel brought with copper sulfate per day from November to December in 81 For 1.2 ~ 1.5 kg. The electrolyte containing nickel increased to 5.5 ~ 6mg / l, Ni 2 ~ 3mg / l, a serious threat to the normal production. Cobalt and nickel are the most difficult impurities to remove from the leaching solution of hydrometallurgy. There are two commonly used methods of purification: one is electrification