Method for extracting cobalt and copper from cobalt-copper-iron alloy

The invention discloses a method for extracting cobalt and copper from cobalt-copper-iron alloy, and relates to a method for preparing electrical copper and high-purity cobalt salt from high-silicon cobalt-copper-iron alloy serving as a raw material. The method is characterized by comprising the following steps of: (1) levigating the alloy; (2) performing acid leaching on the levigated alloy under the conditions of heating, pressurizing and introducing oxygen; (3) filtering leached ore pulp, and washing leached residue; and (4) recovering copper from leachate by adopting an extraction-electrodeposition process, removing impurities from copper raffinate, and extracting the cobalt and nickel. The method has the advantages that: the pressure leaching is low in temperature, the consumption of a reagent is low, the selectivity is high, the leaching rate of valuable metals is high, most iron is inhibited in the residue, the leached ore pulp has high filter performance, the harmful impurity of silicon is totally solidified in the iron residue, and the method is an environment-friendly process which is easy to implement.