Method for extracting gold, platinum and palladium in electronic scrap copper anode mud

Abstract

The invention discloses a method for extracting gold, platinum and palladium in electronic scrap copper anode mud. The method comprises the steps that (1), the electronic scrap copper anode mud is mixed with an oxidizing agent and an additive, and chloridizing, oxidizing and leaching treatment is conducted to obtain leached slurry; (2), the leached slurry is filtered to obtain filtrate containinggold, platinum and palladium and filter residues; (3), the filtrate is mixed with a gold extraction agent to be subjected to extraction treatment, and a gold-loaded organic phase and raffinate containing platinum and palladium are obtained; (4), back extraction treatment is conducted on the gold-loaded organic phase through oxalic acid, so that an organic solution and gold powder are obtained; (5), adsorption treatment is conducted on the raffinate containing platinum and palladium by adopting anion exchange resin; and (6), desorption treatment is conducted on the anion exchange resin adsorbing platinum and palladium through hydrochloric acid, and then platinum and palladium are obtained. The method has the advantages of being short in process, low in operating cost, high in rare and precious metal recycling rate, environmentally friendly and the like.

Description

technical field [0001] The invention belongs to the field of comprehensive recovery of electronic waste, in particular, the invention relates to a method for extracting gold, platinum and palladium in copper anode slime of electronic waste. Background technique [0002] In addition to recycling gold, silver, copper, etc., selenium, tellurium, antimony, lead, arsenic, nickel, platinum group metals, etc. are also comprehensively recovered from copper anode slime, which has become precious metals such as gold, silver, platinum, palladium, and scattered selenium, tellurium, etc. It is an important raw material for metal production. At present, domestic and foreign copper anode slime treatment processes mainly include fire roasting + wet treatment process and full wet treatment process. Among them, the fire roasting + wet treatment process is adopted, for example (1) sulfuration roasting is used, followed by two stages of pre-leaching and pressure leaching, the separated slag is ...

AI Technical Summary

Problems solved by technology

However, this method will cause the subsequent separation and recovery process of rare and precious metals to be too long

At the same time, the fire roasting process has inherent shortcomings such as serious environmental pollution, high slag return, low gold and silver recovery rate, long production cycle, and a large backlog of precious metals, which affect the capital turnover of enterprises.

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