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将合金的水溶液、硫脲或硫代硫酸盐、一定量的银(特别是在矿石浸出以后)与喷射或加压下的氢气接触,以还原溶液中的金化合物,接着用沉淀、过滤或离心分离加以回收。浸出矿石所得的稀溶液用传统的离子交换或溶剂萃取法来富集,并用氢气(特别是氢化催化剂存在时)还原处理以沉淀金和银(供后面分离)。在压力存在下还原处理溶液时硫脲不会溶解,并能返回矿石浸出工序。 例如,将一种黄铜矿精矿在用作氧化剂的过氧
An aqueous solution of the alloy, thiourea or thiosulfate, an amount of silver (especially after ore leaching) is contacted with a jet or pressurized hydrogen to reduce the gold compound in solution, followed by precipitation, filtration or centrifugation Separation to be recovered. The lean solution resulting from the leaching of the ore is enriched by conventional ion exchange or solvent extraction processes and is reduced with hydrogen, especially in the presence of a hydrogenation catalyst, to precipitate gold and silver for later separation. Thiourea will not dissolve when the solution is reduced under pressure and will return to the ore leach process. For example, a chalcopyrite concentrate is used as an oxidizer for oxygen