氯化精炼在镍钴湿法冶金中的应用探索  

Application of chloridizing refining in nickel-cobalt hydrometallurgy

作　　者：吉永亮 李树兴 陈胜利 卢建波[1] 房春娟 JI Yong-liang;LI Shu-xing;CHEN Sheng-li;LU Jian-bo;FANG Chun-juan(Nickel Smelter,Jinchuan Group Co.Ltd.,Jinchang 737100,China;Inspection&Test Center,Jinchuan Group Co.Ltd.,Jinchang 737100,China)

机构地区：[1]金川集团股份有限公司镍冶炼厂,甘肃金昌737100 [2]金川集团股份有限公司检测中心,甘肃金昌737100

出　　处：《中国有色冶金》2022年第1期38-43,共6页China Nonferrous Metallurgy

摘　　要：本文以某公司镍精矿为原料,通过借鉴国内外氯化精炼工艺的研究成果和生产实践,在实验室验证了氯化浸出-萃取-电积工艺生产高品质电积镍的可行性,试验结果表明:镍精矿经过镍精矿+阳极泥法置换沉铜后,首先进行氯气浸出,在较佳的工艺参数条件下,置换沉铜率高达99.8%,氯气浸出过程中镍、铜、铁和钴的浸出率分别达到96.02%、100%、100%和63.33%;置换后液首先进行针铁矿法除铁,然后采用N235-P204联合萃取,在较佳工艺参数下,除铁后液铁含量仅为0.003 1 g/L,除铅离子以外,萃余液中的其他杂质金属离子含量均已达到电积新液的要求;对萃余液采用氯气+碳酸镍法进行氧化除铅,除铅后液含铅为0.000 1 g/L,在较佳的电积工艺参数下,可生产出纯度99.99%的电积镍。With the nickel concentrate from xxx company as raw material and by reference to the study results and production practice of the chloridizing refining process at home and abroad, the feasibility of adopting the chloridizing leaching-solvent extraction-electrowinning process to produce high-quality cathode nickel has been verified in a laboratory. The test results show that as the nickel concentrate is subjected to Cu replacement and precipitation by adding anode slime, followed by chlorine leaching, under the condition of preferable process parameters, the Cu replacement & precipitation rate is up to 99.8%, and during the chlorine leaching, the leaching rate of Ni, Cu, Fe and Cu reaches 96.02%, 100%, 100% and 63.33% respectively;as the solution after Cu replacement further goes through Fe removal by using hematite method, followed by N235-P204 combined extraction, under the condition of preferable process parameters, the Fe content in the solution after Fe removal is only 0.003 1 g/L, the contents of ionic metal impurities, except Pb ion, in the raffinate can meet the requirement of the purified solution for electrowinning;the raffinate is further subject to Pb removal using the chlorine+nickel carbonate method, the solution after Pb removal contains Pb of 0.000 1 g/L, under the condition of preferable electrowinning process parameters, cathode nickel with a purity of 99.99% can be produced.

关 键 词：镍精矿 氯化体系 氯化精炼 高品质电积镍 净化 除铅 N235-P204溶剂萃取 不溶阳极电积 

分 类 号：TF815[冶金工程—有色金属冶金] TF803.21