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将物料用王水分解 ,加盐酸加热赶尽硝酸 ,以m(Fe2 +) /m(Au) =1 .6∶1的质量比 ,加入氯化亚铁溶液选择性还原金。洗涤后 ,750℃灼烧至质量恒定。金回收率为99 92 %～ 1 0 0 0 2 %。
The material is decomposed with aqua regia, hydrochloric acid is heated to catch nitric acid, and the ferrous chloride solution is used to selectively reduce the gold at a mass ratio of m (Fe2 +) / m (Au) = 1.6: 1. After washing, 750 ° C to constant mass. Gold recovery was 99 92% ~ 100%.