废钯催化剂浸出液中钯的硫化沉淀试验研究  

Experimental Study on Sulfide Precipitation of Palladium in Leachate of Waste Palladium Catalyst

作　　者：张帆 吴祖璇 王芳 刘昱辰 张金池 ZHANG Fan;WU Zuxuan;WANG Fang;LIU Yuchen;ZHANG Jinchi(Jiangsu BGRIMM Metal Recycling Science&Technology Co.,Ltd.,Xuzhou 221121,China)

机构地区：[1]江苏北矿金属循环利用科技有限公司,江苏徐州221121

出　　处：《中国资源综合利用》2024年第7期41-44,共4页China Resources Comprehensive Utilization

摘　　要：湿法工艺是废钯催化剂的主流回收工艺,作为经典的传统湿法工艺,焙烧-浸出-置换-提纯工艺既有显著优势,也存在不足。试验采用HCl-NaClO_(3)体系对废钯催化剂进行浸出,研究硫化沉淀的影响因素,揭示PdS的沉淀规律,完善工艺参数,实现技术优化,为产业化应用提供可靠的理论基础。研究表明,硫化沉淀法可以代替产渣量巨大的铁置换法,钯沉淀率可以达到99.99%,尾液的贵金属含量达到相关排放标准,浸出液中的钯实现高效富集。The wet process is the mainstream recycling process for waste palladium catalysts,as a classic traditional wet process,the roasting-leaching-displacement-purification process has both significant advantages and disadvantages.The experiment uses HCl-NaClO_(3) system to leach waste palladium catalyst,studies the influencing factors of sulfide precipitation,reveals the precipitation law of PdS,improves process parameters,achieves technical optimization,and provides a reliable theoretical basis for industrial application.Research has shown that the sulfide precipitation method can replace the iron displacement method,which produces a large amount of slag,the palladium precipitation rate can reach 99.99%,and the precious metal content in the tailings meets the relevant emission standards,and the palladium in the leachate can be efficiently enriched.

关 键 词：废钯催化剂 浸出液 钯 富集 回收 硫化沉淀 

分 类 号：TF836[冶金工程—有色金属冶金] TQ426[化学工程]