Closed-circuit process technique for recovering multiple metals from copper and lead electrolysis anode mud

Abstract

The invention discloses a closed-circuit process technique for recovering multiple metals from copper and lead electrolysis anode mud. The closed-circuit process technique is characterized in that a closed-circuit process is formed by connecting various chemical engineering including anode mud low-temperature oxidation roasting, copper, selenium and tellurium leaching through diluted sulphuric acid, lead soaking through diluted hydrochloric acid, neutralization, gold, platinum and palladium leaching through sodium chlorate, gold immersion through oxalic acid, replacing, dissolving, silver separating through sodium sulfite, restoring, secondary chlorination on primarily separated silver slug, secondary silver separation through secondary chlorination slug, selenium powder restoring, refining, acidizing and copper replacing. By means of the closed-circuit process technique, eight elements of gold, silver, platinum, palladium, selenium, tellurium, copper and lead can be recovered comprehensively, the recovering rate is high, the recovering rate of gold is larger than 99%, the recovering rate of silver is larger than 99%, the recovering rate of platinum is larger than 98%, the recovering rate of palladium is larger than 99%, the recovering rate of copper is larger than 99%, the recovering rate of selenium is larger than 98%, the recovering rate of tellurium is larger than 94%, the recovering rate of lead is larger than 96%, the level of refined selenium reaches 99.5%, the level of crude tellurium reaches 95.6%, the level of sponge silver reaches 99.97%, the level of sponge gold reaches 99.9%, and platinum, palladium, copper and lead exist in the type of intermediate products and can reach high level through further refining. The process technique is a closed-circuit circulating process flow, generates no waste liquid and waste residue, and is a perfect copper and lead electrolysis anode mud processing process and suitable for being popularized and used in copper and lead smelting enterprises.

Description

technical field [0001] The present invention relates to a kind of smelting technology, more specifically, the present invention relates to a kind of process technology that recovers gold, silver, platinum, palladium, selenium, tellurium, copper, lead and other metals from electrolytic anode slime of copper and lead . Background technique [0002] Copper and lead electrolytic anode slime generally contain gold, silver, platinum, palladium, selenium, tellurium, copper, lead and other metal elements. Typical chemical composition of copper anode slime is (%): Au0.602, Ag10.59, Cu21.63, Pb10.02, Bi0.62, Se3.47, Te0.51; typical chemical composition of lead anode slime is (% ): Pb8-10, Bi5-8, Au0.32, Ag15.35, Te0.43, Sb45-55, Cu0.6, Se0.2. Although the above chemical composition does not list Pt and Pd (due to the small content), they all enter the anode slime and are enriched after a series of processing. Therefore, the electrolytic anode slime of copper and lead is a rich ore ...

AI Technical Summary

Problems solved by technology

Therefore, the electrolytic anode slime of copper and lead is a rich ore for recovering various metal elements. If it is not utilized, it will cause a waste of resources.

[0003] The disadvantages of the traditional copper and lead electrolytic anode slime recovery process are that, firstly, the valuable metals cannot be fully recovered;

So far, there is no process technology for copper-lead electrolysis anode slime that can recover all the valuable metals in it and can be recycled in a closed circuit

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