前言从稀的氰化液中回收金银在工业上已有近百年的历史.对磨成细粉的金银矿石进行浸出可以得到这种溶液.贵金属矿区或电镀厂的排放液与洗液当中也含金银,但只能达到ppm级.其它一些重要的溶液来源有洗脱液、定影液以及用过的电镀液,它们的贵金属含量大都高于1g/L.有些溶液是循环使用的,这样最终的含量会更高.人们研究和应用了许多办法 Preface The recovery of gold and silver from dilute cyanide has been in the industry for almost a century, and the solution can be obtained by leaching the finely ground gold-silver ore, which is discharged from the discharge and washings of precious metal mines or electroplating plants But also gold and silver, but can only reach the ppm level.Other important sources of solution are eluent, fixer and used plating solution, their precious metals are mostly higher than 1g / L. Some solutions are recycled, In this way, the final content will be higher.Many ways to study and apply