A kind of treatment method of waste copper sulfate electrolyte

Abstract

A method for treating waste copper sulfate electrolyte relates to a method for removing copper and removing impurities such as arsenic, antimony and bismuth from waste copper sulfate electrolyte in a copper electrolysis process. It is characterized in that the steps of its treatment process include: (1) electrowinning and decoppering the waste copper sulfate electrolyte to obtain standard cathode copper; (2) performing deep electrowinning and decoppering the solution after step (1) decoppering; 3) Electrodeposition and removal of impurities from the solution after deep electrowinning copper removal in step (2). The method of the invention can efficiently separate copper from waste copper sulfate electrolyte, produce standard cathode copper, and can effectively remove impurities such as arsenic, antimony and bismuth. Compared with the traditional induced decopper method, it can greatly reduce the amount of black copper slag, reduce the copper content in black copper slag, increase the direct recovery rate of copper, reduce the production cost of copper, and significantly improve the economic and environmental benefits of the enterprise.

Description

technical field [0001] A method for treating waste copper sulfate electrolyte relates to a method for removing copper and removing impurities such as arsenic, antimony and bismuth from waste copper sulfate electrolyte in a copper electrolysis process. technical background [0002] At present, the purification of waste copper sulfate electrolyte in the copper electrolysis process mostly adopts the traditional induced decopper method to remove copper and remove arsenic, antimony, bismuth and other impurities. This process has obvious disadvantages: ① lead anode plate is used as the anode, the cell voltage is high, and the energy consumption of electrolysis is large; ② the current density and current efficiency are low, and the removal rate of impurities such as arsenic, antimony and bismuth is not high; ③ the output of dangerous solids The amount of waste black copper slag is large, and the on-site stacking will cause pollution to the surrounding environment. The high copper c...

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Problems solved by technology

[0002] At present, the purification of waste copper sulfate electrolyte in the copper electrolysis process mostly adopts the traditional induced decopper method to remove copper and remove arsenic, antimony, bismuth and other impurities. This process has obvious disadvantages: ① lead anode plate is used as the anode, the cell voltage is high, and the energy consumption of electrolysis is large; ② the current density and current efficiency are low, and the removal rate of impurities such as arsenic, antimony and bismuth is not high; ③ the output of dangerous solids The amount of waste black copper slag is large, and the on-site stacking will cause pollution to the surrounding environment. The high copper content in the slag will cause a large backlog of copper raw material intermediate products, the direct recovery rate of copper is low, the operating cost increases, and the cost of re-smelting treatment is high. It is very difficult, and at the same time, it will cause the enrichment of impurities, which will affect the quality of cathode copper again; ④ acid mist and harmful gas arsine will be precipitated during the reaction process, which will endanger the working environment; Unfavorable factors; ⑥The process of copper removal and impurity removal is long and the operation is relatively complicated

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