镍电解阳极液深度净化除铅  

Deep lead removal from anodic electrolyte of nickel electrolysis

作　　者：侯晓川[1,2] 肖连生[1] 高丛堦[1] 闫忠强 张启修[1] 郭金良 

机构地区：[1]中南大学冶金科学与工程学院,长沙410083 [2]金川有色金属公司,金昌737100

出　　处：《北京科技大学学报》2010年第1期55-60,共6页Journal of University of Science and Technology Beijing

摘　　要：为了处理含高铅的镍物料,进行了电解阳极液中深度除铅的实验研究.分析了电解镍含铅量与电解液中Pb2+质量浓度的关系、共沉淀净化除铅的机理及电解液中的Cl-、Fe3+对除铅结果的影响.通过实验研究,确定了采用共沉淀法深度除铅的最优技术参数:氯化钡加入系数为150、除铅温度为55℃、搅拌除铅时间为60 min、喷淋加入氯化钡溶液的时间为21 min、絮凝剂的质量浓度为2.5 g.L-1.实验结果表明:采用氯化钡共沉淀法净化除铅,除铅后电解液中[Pb2+]≤0.0003 g.L-1,渣含镍质量分数小于4%,满足电解镍生产对电解液成分的要求.通过除铅扩大试验,证明了小型试验所确定的技术参数的可靠性,该工艺成功地应用于工业生产实践.In order to deal with nickel materials which contain high lead,experimental investigations were performed to remove deeply lead from anodic electrolyte.By analyzing the relationship of Pb2＋ concentration in electrolyte and lead content in electrolytic nickel,the mechanism of lead removal by coprecipitation,and the effects of Cl-and Fe3＋ on the results of lead removal,some optimum technological parameters were determined for deep lead removal by coprecipitation： the coefficient of adding barium chloride is 150,the temperature of lead removal is 55 ℃,the time of lead removal by stirring and the time of adding barium chloride solution by spraying are 60 min and 21 min respectively,and the mass concentration of flocculant is kept constant at 2.5 g·L-1. It is shown that lead can be removed by coprecipitation with barium chloride,the mass concentration of Pb2＋ is not more than 0.000 3 g·L-1 in lead removal electrolyte,and the mass fraction of nickel in slag is less than 4%,which meet the need of producing electrolytic nickel for electrolyte composition.The enlarged experiments prove that the technological parameters derived from the laboratory experimenters are reliable and the process has been applied to industrial production successfully.

关 键 词：镍 电解液 除铅 共沉淀 氯化钡 

分 类 号：TG146.15[一般工业技术—材料科学与工程]