Method for recycling multiple precious metals from anode mud

Abstract

The invention discloses a method for recycling multiple precious metals from anode mud, comprising a step of smelting and filtering the anode mud in a smelting furnace, cooling the smelted material and then preliminarily immersing and removing copper to obtain extract and leached mud, conveying the leached mud to acid leaching tank to obtain extract and leached mud again, conveying the extract to the hydrolysis tank to process neutralization precipitation, conveying the leached mud to alkaline leaching lead tank, processing smelting method to the processed leached mud. The extract is conveyed to copper extraction tank to process back extract by the organic substances of organic box. Copper-contained material and extract residual are obtained after extraction. The copper-contained material is conveyed to the load organic box to process back extract; after the back extract, the material part is conveyed to the organic box to reprocess; the rest back extract liquid is conveyed to the electrodeposition tank to process electrodeposition to obtain cathode copper. The extract residual liquid obtained from copper extraction box is conveyed to a sedimentation tank to settle; and the waste liquid is conveyed to waste water treatment system to treat. The invention uses wet leaching method to separate precious metals, combines the advantages of fire and wet production and solves the problems of arsenic pollution, long production process, bad raw material applicability, long production period and lower comprehensive recovery in the fire smelting. The recycling yield of gold, silver, copper, antimony, bismuth, arsenic and lead reaches up to 95%.

Description

technical field [0001] The invention belongs to the field of metallurgy, and specifically refers to a method for recovering various rare and precious metals from lead-copper anode slime by combining a fire method and a wet method. Background technique [0002] Anode slime is composed of various substances that are insoluble in the electrolyte produced during the electrolytic refining process of copper anodes and lead anodes. During electrolysis, the base metal with lower potential dissolves into the solution, and the precious metal, scattered metal, anode powder, etc. form insoluble matter and become anode slime. The anode slime contains copper, lead, antimony, bismuth, arsenic, silver, gold and platinum group metals, and the metals in the anode slime include platinum group metals, gold, most of silver, a small amount of copper and gold as metals Compounds exist, while the rest of the metals mostly exist in the form of oxides. Copper-lead anode slime has a high content of ...

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Problems solved by technology

The traditional pyrotechnic process is basically abandoned due to the large pollution to the environment. The combined dressing and metallurgy process and the wet process are widely used. Many patents for these two types of production processes have also been published in Chinese patents. According to literature, these processes have solved to a certain extent the adaptability of raw materials, construction investment, operating costs, direct recovery rate of precious metals, process length, energy consumption, production cycle, comprehensive utilization efficiency and environmental protection in the process of anode slime processing and production. Problems and deficiencies in protection, etc.

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