Processing method for rare and precious metal renewable resource copper anode slime

Abstract

The invention discloses a processing method for rare and precious metal renewable resource copper anode slime. The processing method comprises the steps that (1) the copper anode slime, an oxidizing agent and an additive are mixed and subjected to chloridizing and oxidizing leaching treatment so that leaching slurry can be obtained; (2) the leaching slurry is filtered to obtain filter liquor; (3)the filter liquor is subjected to first extraction treatment, and a gold-bearing organic phase and extraction raffinate containing platinum and palladium are obtained; (4) reextraction treatment is conducted on the gold-bearing organic phase through oxalic acid, and a first organic solution and gold powder are obtained; (5) the extraction raffinate containing the platinum and the palladium is subjected to second extraction treatment, and a palladium-bearing organic phase and extraction raffinate containing platinum are obtained; (6) reextraction treatment is conducted on the palladium-bearingorganic phase through ammonium hydroxide, and a second organic solution and a palladium enriched solution are obtained; (7) the extraction raffinate containing the platinum is subjected to third extraction treatment, and a platinum-bearing organic phase and extraction raffinate are obtained; and (8) reextraction treatment is conducted on the platinum-bearing organic phase through ammonium hydroxide, and a third organic solution and a platinum enriched solution are obtained. The processing method has the advantages of being short in procedure, low in operation cost, high in rare and precious metal recovery rate, environmentally friendly and the like.

Description

technical field [0001] The invention belongs to the field of comprehensive recycling of rare and precious metal renewable resources, in particular, the invention relates to a treatment method for rare and precious metal renewable resource copper anode slime. 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 ...

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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