用P204从粗硫酸镍溶液中萃取分离铁锌杂质  

Extraction and separation of Fe and Zn impurities from crude nickel sulfate solution with P204

作　　者：刘士祥 魏栋 董广刚 刘敬师 蒋永建 LIU Shi-xiang;WEI Dong;DONG Guang-gang;LIU Jing-shi;JIANG Yong-jian(Yanggu Xiangguang Copper Co.,Ltd.,Yanggu 252327,China)

机构地区：[1]阳谷祥光铜业有限公司,山东阳谷252327

出　　处：《中国有色冶金》2022年第2期44-49,共6页China Nonferrous Metallurgy

摘　　要：从铜电解液中回收镍的过程中产生的粗硫酸镍存在杂质含量高的问题,使得粗硫酸镍附加值低,需要进行二次除杂。某铜冶炼企业采用P204对粗硫酸镍溶液进行了萃取除杂工艺试验,并针对试验中出现的镍损失率高、乳化现象严重的问题进行了优化改进,取得了良好效果。使用氢氧化钠对P204萃取剂进行皂化,利用钠皂对粗硫酸镍溶液进行萃取,铁、锌的萃取率均在99.9%以上,镍损失率为12.26%。在P204皂化过程中,将钠皂转化为镍皂,可以减少镍的损失,采用镍皂对粗硫酸镍溶液进行萃取,铁、锌的萃取率仍在99.9%以上,镍损失率则可降至0.4%。通过控制和净化粗硫酸镍溶液和控制料液pH值等措施可以解决萃取过程中的乳化问题。The crude nickel sulfate produced in the process of recovering nickel from copper electrolyte has the problem of high impurity content,resulting in a low added value of the crude nickel sulfate,thus,requiring a secondary impurity removal.A copper smelting enterprise used P204 to carry out an extraction and impurity removal process test on crude nickel sulfate solution,and optimized and improved the issues of high nickel loss rate and serious emulsification in the test with excellent results.The P204 extractant was saponified with sodium hydroxide,and the sodium soap was used for extraction of the crude nickel sulfate solution.The extraction rates of iron and zinc were all above 99.9%,and the nickel loss rate was 12.26%.In the saponification process of P204,the loss of nickel could be decreased by converting sodium soap into nickel soap.When nickel soap was used for extraction of the crude nickel sulfate solution,the extraction rates of iron and zinc were still above 99.9%,and the loss rate of nickel was lowered to 0.4%.The emulsification issue in the extraction process can be solved by controlling and purifying the crude nickel sulfate solution and controlling the pH value of the feed solution.

关 键 词：铜电解液 镍回收 粗硫酸镍溶液 P204萃取 钠皂 镍皂 乳化 镍损失率 

分 类 号：TF815[冶金工程—有色金属冶金]