铜电解脱铜后液冷冻结晶法除镍制备硫酸镍  

Nickel removal from copper electrolyte and preparation of nickel sulfate

作　　者：梁玮 王俊杰 王万军 代杰 LIANG Wei;WANG Jun-jie;WANG Wan-jun;DAI Jie(Jinguan Copper Branch,Tongling Nonferrous Metals Group Co.,Ltd.,Tongling 244000,Anhui,China)

机构地区：[1]铜陵有色金属集团股份有限公司金冠铜业分公司,安徽铜陵244000

出　　处：《矿冶》2022年第6期76-79,共4页Mining And Metallurgy

摘　　要：为了消除镍对铜电解的影响,采用冷冻结晶法脱除铜电解液中的镍并回收镍,重点考察硫酸浓度、冷冻温度、冷冻时间、硫酸镍终点温度等工艺参数对电解液中镍脱除的影响。在此基础上,通过优化生产实践工艺参数条件制备粗制硫酸镍。结果表明:适宜硫酸镍初始液酸浓度宜选择在395 g/L以上,最佳冷冻终点温度控制在-18℃,硫酸镍脱除率可提高至50%~55%,在此条件下通过工艺优化可使电解液中的镍含量下降至8 g/L以下,有效降低电解系统电解液的电阻,并大幅度降低电解综合能耗。In order to eliminate the influence of nickel on copper electrolysis,the freezing crystallization method is used to remove nickel from copper electrolyte and recover nickel.The effects of process parameters such as sulfuric acid concentration,freezing temperature,freezing time,and terminal temperature on nickel removal from the electrolyte are mainly investigated.On this basis,the crude nickel sulfate was prepared by optimizing the production practice process parameters.The results show that the appropriate initial acid concentration of nickel sulfate solution is above 395 g/L,the optimal freezing end point temperature is controlled at-18℃.Under this condition,the nickel sulfate removal rate is increased to 50%-55%,and the nickel content in the electrolyte can be reduced to below 8 g/L through process optimization,which effectively reduces the resistance of the electrolyte in the electrolysis system,and greatly reduces the comprehensive energy consumption of electrolysis.

关 键 词：铜电解 冷冻结晶法 镍脱除 镍回收 硫酸镍 

分 类 号：TF811[冶金工程—有色金属冶金] TF111