Method for separating and recycling precious metal in copper anode mud high acid leaching liquor

Abstract

The invention discloses a method for separating and recycling precious metal in copper anode mud high acid leaching liquor. The method comprises the following main steps of high acid leaching, ultrasonic palladium sinking, calcining, lead powder replacement, tail liquor regeneration and the like. Compared with the prior art, due to the fact that xanthate is adopted in the method for selectively and efficiently recycling palladium, palladium, platinum and gold are prevented from being precipitated and recycled at the same time, the purity of an obtained palladium product is high, and palladiumlosses are reduced; enrichment of gold, silver and other precious metal is achieved through lead powder replacement; meanwhile, the mechanical effect and the heat effect are achieved along with the cavitation phenomenon generated in the ultrasonic assistance process, agent diffusion is promoted, the activity of xanthate is improved, the reaction with palladium is accelerated, the precipitation rate is increased, the reaction time is shortened, meanwhile, the viscosity of a solution can be reduced, and the number of times of circulation can be increased; and after excessive xanthate in replacement later liquor is subjected to sodium chlorate oxidation removal, the replacement later liquor returns to the copper anode mud high acid leaching procedure for cyclic use. The method has the advantages that the process is simple and feasible, adopted raw materials and equipment are common and cheap, and pollution is avoided.

Description

technical field [0001] The invention relates to a method for separating and recovering precious metals from high-acid leachate produced in the copper anode slime treatment process, in particular to a method for directional separation of low-content palladium in the chlorinated leachate of copper anode slime, precious metal enrichment and tail liquid regeneration and utilization. Background technique [0002] Copper anode slime is a by-product produced in the copper electrolytic refining process, because it contains a large number of valuable elements such as gold, silver, palladium, platinum, copper, selenium, antimony, bismuth, tellurium, etc., and is an important component of secondary resources part. At present, most smelting enterprises use pyrotechnics to extract rare and precious metals in copper anode slime. The smoke and dust produced in the pyrotechnic process are washed with water to form a large amount of high-acid washing solution, which not only contains a large...

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Problems solved by technology

[0006] The purpose of the present invention mainly solves the problem of high-efficiency recovery of low-content palladium in the high-acid leaching solution of copper anode slime, and proposes a method for directional separation of low-content palladium in the high-acid leaching solution of copper anode slime assisted by ultrasound, precious metal enrichment and tail liquid regeneration.

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