| abstract |
The invention relates to a method for extracting metals, in particular copper, from copper-containing raw material, in accordance with which the material is leached into a chloride-containing solution. The leaching of the raw material is carried out in an oxidative manner and at a redox potential high enough so that the copper in the copper chloride solution after leaching is predominantly bivalent. The resulting chloride solution containing copper and, potentially, other valuable metals, is fed to a liquid extraction. During extraction, copper is first transferred to the organic phase by extraction, and then by distillation into a sulphate solution, which is then fed to the electrochemical extraction of copper. |