基于硫化镍除铜反应的化学添加剂对电解镍质量影响研究  

The Influence of Additives on Copper Removing and Electrolytic Nickel′s Quality

作　　者：王得祥[1] 卢建波[1] 李亦婧[2] 赵重[1] 郑军福[1] 陈自江[1] 郭勇[2] 

机构地区：[1]金川集团股份有限公司,金昌737100 [2]中国科学院兰州化学物理研究所,兰州730000

出　　处：《材料导报（纳米与新材料专辑）》2015年第1期280-283,共4页

基　　金：甘肃省科技重大专项计划项目(143GKDC012);中国科学院科技支甘择优项目(2013-6-5ZY)

摘　　要：非晶态活性硫化镍除铜法在镍电解阳极液除铜工艺中引入分散剂聚乙二醇400以提高活性硫化镍表面积增强其反应性，加入还原剂水合肼提高活性硫化镍在空气中的稳定性，加入铜离子活化剂亚硫酸钠进一步提高除铜效果。研究了生产条件下以上3种添加剂加入对非晶态硫化镍法除铜离子，电解制备镍的质量影响。在工业放大实验中，反应pH在2．5～3．5范围内，温度65℃左右，每次反应时间15～22min，添加剂的使用取得了良好除铜效果，除铜后液中Cu^2＋浓度低于0．003g／L，铜渣中铜镍比大于15：1，除铜后液再经氯气除钴步骤后，制得的电解镍中各元素含量完全符合Ni9996质量标准。In new highly effective removing copper method, the surface area and air stability of nickle sulfide can be increased by adding dispersants and reductants, the copper removing effect can be enhanced by adding copper ion activator. According to the practical conditions, the influence of all three additives on nickle sulfide removing copper of nickle electrolysis anode solution and electrolytic nickel＇s quality was studied. When pH value is 2.5-3.5, and reaction time 15-22 min at 65 ℃, the industrial experiment shows the addition of additive improved the copper removing effect, the concentration of copper is less than 0. 003 g/L in the electrolyte solution and the mass ratio of copper to nickel is more than 15 ： 1 in the residue. In addition, the content of metallic elements all accords with Ni9996 standard after cobalt removed by chlorine.

关 键 词：活性硫化镍 除铜 电解镍 

分 类 号：O614.81[理学—无机化学]