Method for producing electrodeposited cobalt by non-hydrochloric acid electrolyte

A technology of electrolyte and electrowinning, which is applied to the improvement of process efficiency, photography process, instruments, etc., and can solve the problems of complex process, low metal recovery rate, and increased operating cost.

Active Publication Date: 2009-09-16
YANTAI KAISHI IND CO LTD
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Problems solved by technology

Due to the complex process, low metal recovery rate, large capital investment, and disadvantages such as environmental protection, it has been gradually replaced by the insoluble anode electrodeposition process of full hydrometallurgy; in recent years, cobalt electrodeposition has been carried out in the hydrochloric acid system in China. industrialized production practice
However, due to the pr

Method used

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  • Method for producing electrodeposited cobalt by non-hydrochloric acid electrolyte

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Embodiment

[0033] The method for producing electrolytic cobalt with the non-hydrochloric acid electrolyte of the present embodiment mainly includes the following steps

[0034] 1) The cobalt raw material is put into a pulverizer for pulverization;

[0035] 2) Grinding in the grinding machine;

[0036] 3) Put the ground fine powder into the leaching tank for oxidative leaching to obtain the pre-extraction solution;

[0037] 4) Use chemical methods to remove metal and non-metal impurities, and remove impurities such as calcium and magnesium;

[0038] 5) Solvent extraction: extract with P204 extractant to obtain CoCl 2 solution;

[0039] 6) Resin exchange is used to remove impurities for deep purification.

[0040] 7) Extraction transformation

[0041] CoCl 2 After the solution is separated from nickel Ni and cobalt Co by extractant P507, cobalt is still in the form of CoCl 2 In order to ensure the environmental quality of the electrowinning process, it must be converted to a non-hyd...

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Abstract

The invention relates to a method for producing electrodeposited cobalt, which belongs to the technical field of production methods of the electrodeposited cobalt. The method for producing the electrodeposited cobalt by a non-hydrochloric acid electrolyte is characterized in that the method comprises the steps of: the preparation of a CoCl2 solution, extraction and transformation, dechlorination, the removal of an organic substance by a physical method, the preparation of a cobalt electrolyte, and the production of the electrodeposited cobalt. The method adds an acid fog inhibitor into the electrolyte to ensure that the expansive force on the surface of the electrolyte is reduced and oxygen precipitated by an anode smoothly passes through the liquid level so as to prevent acid from being brought into production field. The method effectively improves work environment and prevent the pollution to the ambient environment. The method for producing the electrodeposited cobalt by the non-hydrochloric acid electrolyte, due to adopting solution transformation and chlorine washing processes, ensures that Cl<-> in the electrolyte is lower than 0.1g.l<-1>, and basically meets the requirement of no precipitation of chlorine gas during the electrodeposition.

Description

1. Technical field [0001] The invention relates to a method for producing electrolytic cobalt, which belongs to the technical field of electrolytic cobalt production methods. 2. Background technology [0002] At present, the more commonly used industrial method for the production of electrolytic cobalt is: after the pyrometallurgy process, the crude cobalt anode plate is produced, and then the electrolytic process is refined, and the soluble anode technology is used to produce electrolytic cobalt products. This process combination adopts the production process of pyrometallurgy and hydrometallurgy to produce electrolytic cobalt. Due to the complex process, low metal recovery rate, large capital investment, and disadvantages such as environmental protection, it has been gradually replaced by the insoluble anode electrodeposition process of full hydrometallurgy; in recent years, cobalt electrodeposition has been carried out in hydrochloric acid system in China industrial prod...

Claims

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Application Information

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IPC IPC(8): C22B23/00C22B3/22C22B3/26C25C1/08
CPCY02P10/20
Inventor 王雪桂孙炜
Owner YANTAI KAISHI IND CO LTD
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