前言以工业规模从稀的氰化物溶液中回收金和银大约已有100年的历史了。这种溶液是浸出细磨金矿和银矿时产生的。贵金属生产和电镀车间的废液和洗水中,也含有金和银,只不过含量仅为百万分之几。其它具有重要回收价值的溶液有解吸液、照象定影液和废电镀液,其中的贵金属含量几乎都超过1克/升。为了从浸出液和废液中提取金和银,曾研究和使用过许多种方法。金和银都可以用置 Preface It is about 100 years old to recover gold and silver from dilute cyanide solutions on an industrial scale. This solution is produced by leaching finely ground gold and silver. The precious metal production and plating plant waste and washing, also contains gold and silver, but the content is only a few millionths. Other solutions of significant recovery value include desorption solutions, photographic fixatives, and spent electroplating solutions in which the precious metal content is almost all over 1 g / l. In order to extract gold and silver from leachate and waste liquid, many methods have been studied and used. Both gold and silver can be used