Technology for treating and purifying copper electrolyte by vortex electrolysis

Abstract

A technology for treating and purifying copper electrolyte by vortex electrolysis relates to the technical field of copper electrolyte purification. The treatment process comprises the steps of: 1. carrying out secondary filter on copper electrolyte to be purified and treated; 2. sending into a vortex electrolysis system to produce standard cathode copper; 3. after three segments of vortex electrolysis, sending the solution with a copper content of 2-4g/L to a vortex electrolysis powder impurity removal stage; 4. removing impurities of arsenic, antimony and bismuth in a powder vortex electrolytic tank; and 5. forming a small amount of black copper ash with a low copper content in a filter cake after press filtration and sending a filtrate into a next operation. The technology of the invention can substitute a traditional induction copper and impurity removal method for purifying and treating copper electrolysis waste liquid, so as to provide an electrolysis technical scheme, which is efficient and reliable, and has simple process flow, simple operation and low cost, for purifying copper electrolysis waste liquid.

Description

Technical field: [0001] The invention relates to the technical field of copper electrolyte purification, in particular to a process for treating and purifying copper electrolyte by swirl electrolysis technology. Background technique: [0002] In the process of copper electrolysis, harmful impurities in blister copper enter the electrolyte through electrochemical dissolution and continue to enrich, which seriously affects the quality of cathode copper. Timely purification of electrolyte is of great significance to the quality of cathode copper. The efficiency of anode in copper electrolytic refining is higher than that of cathode, and Cu 2+ As the concentration increases, so does the impurity concentration. In order to ensure the quality of cathode copper and maintain normal production, the copper electrolyte must be purified. [0003] The copper electrolyte is purified by the traditional method of inducing decopper removal of copper and arsenic, antimony and bismuth impuri...

AI Technical Summary

Problems solved by technology

Arsenic, antimony, bismuth, etc. in the solution with a copper ion concentration of 8g / L begin to precipitate together with copper on the cathode. When the copper ion concentration is reduced to 2g / L, arsine gas is generated, resulting in poor working conditions and polluting the environment. Harmful to human health

[0004] There are obvious disadvantages in the induced decopper process: ① insoluble anode is used, the cell voltage is high, and the energy consumption is high; ② the current density and current efficiency are low; ③ highly toxic arsine is precipitated; Copper plates and black copper slag have a large quantity and high acid content. If they need to be returned to smelting, it will cause the circulation and accumulation of arsenic, antimony, and bismuth impurities. , the operating cost rises; ⑤The selectivity of metal precipitation is not good, and the copper content of intermediate products is too high, reaching 50-70%

[0006] The swirl electrolysis technology can effectively solve the problems of other treatment methods, such as polluting the environment, difficulty in removing impurities from the solution, long process flow, high production cost, and low overall efficiency. Related technical solutions

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