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Method for purifying copper electrolyte with minimal chemical reacting dose

A technology of copper electrolyte and chemical reaction, applied in electrolysis process, electrolysis components, cells, etc., to achieve low energy consumption, avoid invalid removal, and simple operation

Inactive Publication Date: 2010-12-08
HULUDAO ZINC IND CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The method obtains cathode copper, crude copper sulfate, black copper and nickel from the copper electrolysis process through the steps of electrowinning copper removal and arsenic removal, and solves the technical problem of copper electrolyte purification at the same time

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  • Method for purifying copper electrolyte with minimal chemical reacting dose

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Embodiment Construction

[0019] The blister copper plate obtains pure copper through electrolysis. During the electrolysis process, it is deposited as high-purity copper as the copper transfers from the anode to the cathode on the electrode. Because blister copper contains impurity metals such as arsenic and nickel, these impurities remain in the electrolyte during the electrolysis process. With the accumulation of impurities, high power consumption, chemical composition and quality decline, and chemical reactions are large. Based on this situation, the present invention adopts the following methods and steps to purify the copper electrolyte with the smallest amount of chemical reaction.

[0020] Below figure 1 Detailed description of the process flow shown

[0021] 1. Electroproduct copper removal step 1: Inject the copper electrolyte from the electrolysis workshop into the copper removal electrolytic cell, use the lead plate as the anode and the stainless steel plate as the cathode, and apply direct cu...

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Abstract

The invention relates to a method for purifying copper electrolyte, which belongs to the technical field of wet-process metallurgy. High-purity cathode copper, crude copper sulphate, black copper and nickel are obtained by the following steps of: removing copper by electro-deposition; evaporating and condensing liquid in vacuum after copper removal; crystallizing condensate after the copper removal to obtain copper sulfate; preparing electrolyte from which arsenic is removed; removing arsenic by the electro-deposition; and performing filter pressing on black copper slurry. Due to the adoption of the method of the invention, the electrolyte can be purified during copper electro-deposition and the arsenic is removed in the form of an arsenic-copper alloy, so that the production of hydrogen arsenide is controlled and the technical problem of realizing the purification of the copper electrolyte is solved. The method has the advantages of capability of preventing invalid removal of the copper and effectively controlling the separation of polluting AsH3, simple operation, low energy consumption and suitability for copper electrolytic purification process.

Description

Technical field [0001] The invention relates to a method for purifying copper electrolyte with a minimum chemical reaction amount in the technical field of hydrometallurgy. Background technique [0002] In the domestic copper electrolysis production process, electrowinning is mostly used to purify and remove arsenic from the electrolyte. [0003] In the early days, the dead removal method and the two-stage arsenic removal method were generally used. The characteristic of these two methods is that copper is preferentially precipitated. When the concentration of copper ions is reduced to a certain level, arsenic begins to precipitate and a large amount of AsH is produced. 3 gas. Due to the low efficiency of arsenic removal, a large amount of copper is ineffectively removed, high power consumption, and a large amount of AsH 3 Due to gas production and other reasons, these two methods have been eliminated in larger smelters. [0004] Later, the induction method was introduced from Japa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D21/18C25D3/38
Inventor 许健陈德岩杨洪光郭天立任书伟未立清
Owner HULUDAO ZINC IND CO LTD
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