银阳极泥硝酸浸出液中铂和钯的还原富集  

A Study on the Process of Recovering Platinum-Palladium from the Nitric Acid Leaching Solution of Silver Anode

作　　者：王俊娥[1] 衷水平 张焕然 吴健辉[1] 张永锋 林泓富 WANG June;ZHONG Shuiping;ZHANG Huanran;WU Jianhui;ZHANG Yongfeng;LIN Hongfu(Zijin Mining Group Company, Shanghang 364200, Fujian, China;Zijin Copper Company, Shanghang 364200, Fujian, China)

机构地区：[1]紫金矿业集团股份有限公司,福建上杭364200 [2]紫金铜业有限公司,福建上杭364200

出　　处：《贵金属》2017年第3期1-4,共4页Precious Metals

基　　金：福建省区域发展项目(2015H4017)

摘　　要：银阳极泥在硝酸浸出时,大部分铂和钯会进入溶液,最终返回熔炼系统,铂钯直收率因此偏低。研究了亚硫酸氢钠还原沉淀硝酸浸出脱银液中铂和钯的工艺条件。结果表明,还原剂用量、硝酸浓度、反应温度和时间均对铂和钯沉淀率有影响。在优化条件下,铂和钯的沉淀率分别可达到99.5%和99.7%,所得精矿中铂和钯含量分别为1.70%和13.59%。Most of platinum and palladium will go into the solution along with silver during the leaching ofsilver anode slime by nitric acid,resulting in low recovery efficiency of platinum and palladium.In the present study aiming at improving the recovery of platinum and palladium,sodium bisulfite was used to reduce platinum and palladium from the leaching solution before it was submitted to the purification treatment for silver.The conditions for reducing platinum and palladium,such as the amount of sodium bisulfite,concentration of nitric acid,reduction temperature and time,was investigated and optimized.Under the given conditions,the reduction rate can reach99.5%for Pt and99.7%for Pd.The content of Pt and Pd in the reduction slag is1.70%and13.59%,respectively.

关 键 词：有色金属冶金 银阳极泥 硝酸浸出 铂 钯 还原 

分 类 号：TF833[冶金工程—有色金属冶金] TF836