In order to recover gold and silver from anode slimes containing Cu, Ni, Sn, and Zn, an integrated hydrometallurgical process consisting of leaching, solvent extraction, and cementation was developed. All the metals together with 10% of Ag(I) were dissolved by the mixture of HCl and H2O2 at the optimum conditions. Separation of Au (III) together with Sn (II) was performed by Cyanex 272 from the leaching solution with two-stage counter current extraction. Stripping of Au (III) and Sn (II) from the loaded organic phase was sequentially carried out by NH4Cl and NaOH. Cu (II) in the raffinate after Au (III) extraction was separated by LIX 63 with three-stage counter current extraction. Pure Cu (II) solution was recovered from the loaded LIX 63 by stripping with dilute HCl solution. Ag powders with extra high purity were obtained by cementation with copper sheet from the raffinate after Cu (II) separation. Au (III) (99.3%) and 96.8% of Sn (II) were recovered by extraction, and purity of Au (III) and Sn (II) stripping solutions was found to be 99.99%. Au powders with extra high purity were directly synthesized by adding ascorbic acid solution into the NH4Cl stripping solution.

中文翻译：

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开发一种从含有铜、镍、锡和锌的阳极泥中回收金和银粉的湿法冶金工艺

为了从含有 Cu、Ni、Sn 和 Zn 的阳极泥中回收金和银，开发了一种由浸出、溶剂萃取和胶结组成的湿法冶金一体化工艺。所有金属和 10% 的 Ag(I) 在最佳条件下被 HCl 和 H2O2 的混合物溶解。金 (III) 与锡 (II) 的分离是通过 Cyanex 272 从浸出液中分离出来的，采用两级逆流萃取。用 NH4Cl 和 NaOH 依次从负载的有机相中去除 Au (III) 和 Sn (II)。金 (III) 萃取后的萃余液中的铜 (II) 由 LIX 63 用三级逆流萃取分离。通过用稀盐酸溶液汽提从负载的 LIX 63 中回收纯铜 (II) 溶液。通过与铜（II）分离后的萃余液中的铜片进行置换，获得超高纯度的银粉。Au (III) (99.3%) 和 96.8% 的 Sn (II) 通过萃取回收，Au (III) 和 Sn (II) 反萃取溶液的纯度为 99.99%。通过在NH4Cl反萃取液中加入抗坏血酸溶液直接合成超高纯度金粉。