METHOD FOR RECOVERING GOLD FROM GOLD-CONTAINING ORE OR REFINED INTERMEDIATE

摘要

PROBLEM TO BE SOLVED: To provide a method for recovering gold from ore or a refined intermediate capable of contributing the improvement of the recovery of gold.SOLUTION: Provided is a method for recovering gold from gold-containing ore or a refined intermediate, comprising a process where gold-containing raw material obtained from the ore or refined intermediate is contacted with an acidic aqueous solution containing copper ions, iron ions and halide ions under the feed of an oxidizer to leach the gold component in the raw material. The halide ions in the acidic aqueous solution at least include bromide ions, and the concentration of the bromide ions in the acidic aqueous solution is controlled to 100 g/L or higher, or, in the case the concentration of the bromide ions in the acidic aqueous solution is controlled to below 100 g/L and the concentration of the bromide ions is controlled to below 100 g/L, as the concentration ratio of the halide ions in the acidic aqueous solution, the ratio of the concentration of the chloride ions to the concentration of the bromide ions,(Cl/Br concentration ratio) is controlled to 1/3 or lower.SELECTED DRAWING: Figure 1