Acid hydrolysis of cobalt waste and its application in the preparation of high-purity cobalt liquid for tricobalt tetroxide

A technology of waste acid and waste, which is applied in the field of acid hydrolysis of cobalt waste and in the preparation of high-purity cobalt liquid for cobalt tetroxide, can solve the problems of not being able to meet the requirements, and achieve low production cost, high purity, and low content of impurity elements Effect

Active Publication Date: 2019-09-20
HUNAN JINYUAN NEW MATERIALS CO LTD
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AI Technical Summary

Problems solved by technology

Although the industry has similar technologies, it cannot meet the requirements for direct production of battery-grade cobalt tetroxide for cobalt warm liquid

Method used

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  • Acid hydrolysis of cobalt waste and its application in the preparation of high-purity cobalt liquid for tricobalt tetroxide
  • Acid hydrolysis of cobalt waste and its application in the preparation of high-purity cobalt liquid for tricobalt tetroxide
  • Acid hydrolysis of cobalt waste and its application in the preparation of high-purity cobalt liquid for tricobalt tetroxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: Cobalt waste acid hydrolysis method, the cobalt-containing alloy waste is first acidly hydrolyzed with concentrated sulfuric acid, and then concentrated hydrochloric acid is added to acidolyze with mixed acid to prepare an acidolysis mother liquor.

Embodiment 2

[0032] Embodiment 2: Cobalt waste acid hydrolysis method, the cobalt-containing alloy waste is first acidly hydrolyzed with concentrated sulfuric acid, water is added in advance in the mixing tank, and concentrated sulfuric acid is slowly added according to 10-20% of the water volume in the stirring state, according to the water and containing The mass ratio of cobalt alloy waste is 1: 0.3-0.5, and the cobalt-containing alloy waste is added. After the violent reaction stops, the steam is heated to 60-100°C; Add concentrated hydrochloric acid to 8-15% of the volume, keep at 80-100°C, stir for 2-12 hours, then let stand for 2-10 hours; then filter to obtain the acidolysis mother liquor.

Embodiment 3

[0033] Embodiment 3: cobalt waste acid hydrolysis method, carry out as follows:

[0034] a. Add water in the mixing tank in advance, slowly add concentrated sulfuric acid according to 10% of the volume of water under stirring state, add cobalt-containing alloy waste according to the volume ratio of water and cobalt-containing alloy waste at a ratio of 3:1, and pass through after the violent reaction stops. Steam is heated to boiling;

[0035] b. Insulate and stir the acid hydrolyzate in the above step for 5 hours, then add concentrated hydrochloric acid according to 15% of the total volume, keep at 60°C, stir for 4 hours, and then let stand for 4 hours;

[0036] c. After the mixed acid hydrolysis, the acid hydrolyzate is filtered and washed, the filtrate enters the next process, the washing liquid is returned to the mixed acid hydrolysis section for acid adjustment, and the filter cake is harmlessly treated;

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Abstract

Cobalt waste acid hydrolysis method and application in preparation of high-purity cobalt liquid for tricobalt tetroxide, relates to an acid hydrolysis method of cobalt waste and preparation of high-purity cobalt liquid for tricobalt tetroxide. Mixed acid acid hydrolysis first: first acid hydrolyze the cobalt-containing alloy waste with concentrated sulfuric acid, then add concentrated hydrochloric acid to acidolyze with mixed acid to prepare acid hydrolysis mother liquor, and then perform impurity removal, extraction-reextraction to prepare high-purity cobalt liquor. It has the advantages of simple process, fast acidolysis speed, high acidolysis rate, high yield of main element cobalt, low content of impurity elements in acidolysis solution, can be directly used to produce tricobalt tetroxide and battery-grade cobalt salt, and has low production cost.

Description

technical field [0001] The invention relates to an acid hydrolysis method of cobalt waste and a production process for extracting cobalt from cobalt-containing alloy waste, in particular to a production method for wet cobalt extraction, impurity removal, extraction and separation of cobalt-containing alloy waste to obtain high-purity cobalt liquid. Background technique [0002] Cobalt is an important strategic metal and an essential basic material for the manufacture of lithium cobalt oxide batteries and nickel-metal hydride batteries. With the development of the new energy industry, the demand for cobalt is increasing. In addition, my country's cobalt resources are very scarce. The comprehensive recycling of waste batteries is very important, and it belongs to the national key support field. In the comprehensive recycling of waste batteries, the raw materials are firstly subjected to acidolysis. The current acidolysis method is a single acidolysis method. For example, the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B23/00
CPCC22B7/007C22B23/043C22B23/0423C22B7/006C22B3/3846Y02P10/20
Inventor 刘训兵欧阳剑君刘席卷王以森
Owner HUNAN JINYUAN NEW MATERIALS CO LTD
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