Application of an annular gap centrifugal extractor in the extraction of cobalt chloride

Abstract

The invention provides an application of an annular gap type centrifugal extractor in cobalt chloride extraction, including saponification, extraction, re-extraction, acid washing empty spin, back extraction empty spin, primary water washing, pickling and secondary water washing In the first and second boxes of saponification, the number of extraction stages is 2 In the fifth and sixth boxes, the number of additional extraction stages is 2 In the third and fourth boxes, the number of acid washing stages is 3 The grade is in the seventh box, the eighth box, and the ninth box, and the air-spinning series is in the tenth box; the stripping series is three in the eleventh box, the twelfth box, and the thirteenth box. , in the 14th case of air-spinning series 1; in the 14th case of 1-stage water washing, in the 15th case of 1-stage pickling, and in the 16th case of 2-stage water washing; the present invention improves the process control level, The amount of organic input is reduced, and cobalt chloride solution extraction transformation process is used to produce tricobalt tetroxide, which replaces nitric acid to dissolve electric cobalt. The operation is simple, the generation of nitrogen oxides is avoided, the process is safe and reliable, and environmental pollution is reduced.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, relates to the phase separation and separation of solutions in the non-ferrous metal industry such as nickel and cobalt, and specifically relates to the application of an annular gap centrifugal extractor in the extraction of cobalt chloride. Background technique [0002] With the rapid development of the battery industry, lithium cobalt oxide is used as a raw material for lithium battery materials, and the cobalt market is growing at a relatively hot rate in the past ten years and even the next two decades. As a raw material supply base for the production of lithium cobaltate, electrolytic cobalt is used as raw material to produce cobalt tetroxide products: high production cost, limited economic benefits, and poor nitric acid dissolution environment. Therefore, process improvement and system replacement are the main means to reduce costs and improve market competitiveness. As an efficie...

AI Technical Summary

Problems solved by technology

As a high-efficiency extraction equipment, centrifugal extractor can purify and separate non-ferrous metals such as cobalt, but it has low extraction rate and incomplete extraction in liquid phase separation and phase separation.

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