化学还原法从成分复杂的氯化银中制取纯银  

Chemical Reduction Method Prepares Pure Silver from Silver Chloride with Complex Composition

作　　者：冯桂坤 王耀杰 李香娟 陈增兵 王伟刚 FENG Gui-kun;WANG Yao-jie;LI Xiang-juan;CHEN Zeng-bing;WANG Wei-gang(Shandong Zhaojin Gold&Silver Refinery Co.Ltd,Zhaoyuan,265400,Shandong,China;ZHN Precious Metals Testing Co.,Ltd.Zhaoyuan,265400,Shandong,China)

机构地区：[1]山东招金金银精炼有限公司,山东招远265400 [2]中恒诺贵金属检测有限公司,山东招远265400

出　　处：《世界有色金属》2024年第12期176-179,共4页World Nonferrous Metals

摘　　要：采用氨水溶解-三次还原法从成分复杂的氯化银中提取纯银,该工艺主要由氯化银洗涤、氨水溶解、分离固体不溶物、一次还原分离贵金属、二次还原获得纯银、三次还原回收残余的贵金属、银洗涤、银熔炼、废水废气处理等环节组成。实践表明,采用此工艺能以成分复杂的氯化银为原料,制取纯度达到99.99%以上的纯银。该工艺具有基础设施投入少、流程简单、操作方便、适用范围广等优点,适用于大部分企业日常生产过程中产生的氯化银的回收提纯。The extraction of silver chloride with complex composition was studied by ammonia dissolution-tertiary reduction method.The process mainly consists of silver chloride washing,ammonia water dissolution,separation of solid insoluble matter,primary reduction separation of precious metals,secondary reduction to obtain pure silver,tertiary reduction to recover residual precious metals,silver washing,silver smelting,waste water and waste gas treatment.Practice has shown that this process can use silver chloride with a complex composition as raw material to produce pure silver with a purity of more than 99.99%.The process has the advantages of less infrastructure investment,simple process,convenient operation and wide scope of application,and is suitable for the recovery of silver chloride produced in the daily production process of most enterprises.

关 键 词：氨水溶解氯化银 分离固体不溶物 还原法 获得纯银 

分 类 号：TB383.1[一般工业技术—材料科学与工程]