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Method for purifying copper electrolyte with minimal chemical reacting dose

A technology of copper electrolyte and electrolyte, which is applied in electrolysis process, electrolysis components, cells, etc., to achieve the effects of high power consumption, high precision control of process parameters, and improved arsenic removal efficiency

Inactive Publication Date: 2013-02-13
HULUDAO ZINC IND CO LTD
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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 by electrolysis. During the electrolysis process, high-purity copper is deposited as copper transfers from the anode to the cathode on the electrode. Since blister copper contains arsenic, nickel and other impurity metals, these impurities remain in the electrolyte during the electrolysis process. With the accumulation of impurities, it will cause high power consumption, decrease in chemical composition and quality, and a large amount of chemical reaction. Based on this state, the present invention adopts the following methods and steps to purify the copper electrolyte with the minimum amount of chemical reaction.

[0020] Below to figure 1 The process flow shown is described in detail

[0021] 1. Electrowinning copper removal step 1: Inject the copper electrolyte from the electrolytic workshop into the copper removal electrolytic cell, use the lead plate as the anode and the stainless steel plate as the cathode, and pass di...

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Abstract

The invention relates to a method for purifying copper electrolyte with minimal chemical reacting dose, 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 with the minimal chemical reacting dose 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 copper electrolyte purification method in the technical field of hydrometallurgy. Background technique [0002] In the domestic copper electrolysis production process, the purification and arsenic removal of the electrolyte mostly adopts the method of electrowinning. [0003] In the early days, the dead off method and the two-stage arsenic removal method were generally used. These two methods are characterized by the preferential precipitation of copper, and when the concentration of copper ions decreases to a certain level, the 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 Gas generation and other reasons, so these two methods have been eliminated in larger smelters. [0004] Later, the induction method was introduced from Japan, which is curre...

Claims

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Application Information

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Patent Type & Authority Patents(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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