Method for producing electrodeposited cobalt by non-hydrochloric acid electrolyte

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...

AI Technical Summary

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 production of electrolytic cobalt in the hydrochloric acid system, a large amount of chlorine gas will overflow at the anode (about 1.2 times the weight of cobalt metal), so the production environment must be sealed and a supporting chlorine gas absorption system must be set up to produce; this will not only Significantly increases operating costs and poses a potentially great environmental hazard

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