Refined copper slag wet treatment process

Abstract

The invention relates to a wet treatment process for refined copper slag. The wet treatment process comprises the following steps that S1, the refined copper slag is subjected to coarse crushing and fine crushing, and after ball milling, the granularity of the refined copper slag reaches-80--200 meshes; s2, leaching the ground refined copper slag and an ammonia water-ammonium sulfate mixed solution at normal temperature and normal pressure, and carrying out solid-liquid separation after leaching to obtain a copper ammonia complex solution and metal leaching slag; s3, the copper-ammonia complexing solution and a copper extraction agent are extracted, copper in the extracted solution is enriched in the extraction agent, and the extraction agent is subjected to reverse extraction through an electrodeposition copper-poor solution or sulfuric acid to obtain a copper-rich solution; s4, the copper-rich solution enters a copper electrodeposition system for electrodeposition, and a cathode copper finished product is separated out on the cathode; and the extracted raffinate is returned for leaching to serve as a leaching base solution. The process is simple in principle and low in energy consumption, the whole process is mechanically operated, the labor intensity of workers is low, the recovery rate of copper in the whole process is larger than or equal to 95%, and the leaching residues can return to the fuming furnace to continue to recover other metal elements in the fuming furnace.

Description

technical field [0001] The invention relates to the field of nonferrous metal metallurgy, in particular to a process for wet treatment of refined copper slag. Background technique [0002] Use the anode furnace to smelt the copper anode plate in the electrolytic copper process, and remove impurities while smelting and producing the anode plate. The impurity removal is mainly through blowing oxygen and adding slagging agent and reducing agent to remove lead and zinc in the smelting process When other metal impurities are removed, part of the copper will also be oxidized during the process of oxidizing the impurity metal with oxygen blown in, and the slag with high copper content produced in the redox smelting process is the refined copper slag. Refined copper slag has different metal components other than copper depending on the raw material of the anode furnace, but the main metal elements are copper, lead, zinc, tin, nickel, silicon, calcium, iron, among which Copper mainl...

AI Technical Summary

Problems solved by technology

[0009] The above process adopts oxygen pressure and high acid leaching, concentrates crystallization to convert copper into copper sulfate and then enters electrolytic copper for electrolysis, and other metals extracted by acid leaching are further separated. The whole process is long and the metal separation is complicated.

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