Green method for preparing battery grade nickel sulfate from nickel salt

A battery-grade, nickel sulfate technology, applied in the field of hydrometallurgy, can solve the problems of long process flow and high environmental protection pressure, and achieve the effects of easy process, reduced environmental protection burden, and reduced impurity removal process.

Pending Publication Date: 2020-04-24
취저우화여우코발트뉴머터리얼컴퍼니리미티드 +1
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AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of long process flow and high environmental protection pressure in the above-mentioned existing nickel smelting technology, and to provide a battery-grade sulfuric acid from nickel salt that is easy to control the process flow, green and energy-saving, and has low production cost. nickel method

Method used

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  • Green method for preparing battery grade nickel sulfate from nickel salt
  • Green method for preparing battery grade nickel sulfate from nickel salt
  • Green method for preparing battery grade nickel sulfate from nickel salt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of green method that nickel salt prepares battery-grade nickel sulfate, concrete steps are as follows:

[0027] 1. Mix 50g of nickel salt and 32g of ammonium salt into the reaction vessel, add 12% ammonia water as the leaching agent according to the liquid-solid ratio of 4:1, control the reaction time to 2.0h, the reaction temperature to 30°C, and the stirring speed to 300rpm The ammonia leaching reaction is carried out under the same conditions, and the solid-liquid separation is carried out after the reaction to obtain a section of ammonia leaching solution.

[0028] 2. One-stage ammonia immersion liquid controls the ammonia distillation time to be 5 hours and the temperature to 90°C. Use 10% dilute sulfuric acid to adjust the concentration of free ammonia in the liquid after ammonia distillation to 24.65g / L and pH to 7.63 to carry out pressurized hydrogen reduction reaction.

[0029] 3. The liquid after ammonia distillation is subjected to pressurized hydrogen...

Embodiment 2

[0034] A kind of green method that nickel salt prepares battery-grade nickel sulfate, concrete steps are as follows:

[0035] 1. Mix 50g of nickel salt and 66g of ammonium salt into the reaction vessel, add 14% ammonia water as the leaching agent according to the liquid-solid ratio of 4:1, control the reaction time to 2.0h, the reaction temperature to 50°C, and the stirring speed to 400rpm The ammonia leaching reaction is carried out under the same conditions, and the solid-liquid separation is carried out after the reaction to obtain a section of ammonia leaching solution.

[0036] 2. One-stage ammonia immersion liquid controls the ammonia distillation time to be 6 hours and the temperature is 95°C, use 40% dilute sulfuric acid to adjust the concentration of free ammonia in the liquid after ammonia distillation to 19.17g / L, and the pH is 7.52 to carry out the pressurized hydrogen reduction process .

[0037] 3. After ammonia distillation, the hydrogen partial pressure of the...

Embodiment 3

[0042] A kind of green method that nickel salt prepares battery-grade nickel sulfate, concrete steps are as follows:

[0043] 1. Mix 50g of nickel salt and 66g of ammonium salt into the reaction vessel, add 14% ammonia water as the leaching agent according to the liquid-solid ratio of 4:1, control the reaction time to 2.0h, the reaction temperature to 50°C, and the stirring speed to 400rpm The ammonia leaching reaction is carried out under the same conditions, and the solid-liquid separation is carried out after the reaction to obtain a section of ammonia leaching solution.

[0044] 2. One-stage ammonia immersion liquid controls the ammonia distillation time to be 5 hours and the temperature is 95°C, use 20% dilute sulfuric acid to adjust the concentration of free ammonia in the liquid after ammonia distillation to 30.43g / L, and the pH is 8.13 to carry out the pressurized hydrogen reduction process .

[0045] 3. After ammonia distillation, the hydrogen partial pressure of the...

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Abstract

The invention discloses a green method for preparing battery grade nickel sulfate from nickel salt. The green method for preparing battery grade nickel sulfate from the nickel salt comprises the stepsthat the nickel salt and ammonium salt are mixed, ammonia water is added, ammonia leaching reaction is carried out, a first-stage ammonia leaching solution and first-stage ammonia leaching residues are obtained through solid-liquid separation, the first-stage ammonia leaching solution is subjected to ammonia distillation, the pH of the solution obtained after ammonia distillation is adjusted, then nickel powder is prepared through adopting a pressurized hydrogen reduction method; filtrate obtained by carrying out multi-stage ammonia leaching reaction and solid-liquid separation on the first-stage ammonia leaching residues returns to first-stage ammonia leaching slurrying, filter residues is washed by using a three-stage CCD, then a carbonization process is adopted, CO2 partial pressure, reaction time and reaction temperature are controlled, a carbonized liquid and carbonized residues are obtained, and pyrolysis and calcination on the carbonized liquid are carried out, then a magnesiumoxide product is obtained; and the carbide residues are subjected to reduction smelting through a pyrogenic process, and upper-layer rich-manganous slags and lower-layer nickel-cobalt-manganese slagsare obtained after crushing and screening. According to the green method for preparing battery grade nickel sulfate from the nickel salt, the method is easy to control, green and energy-saving, the ammonia water and the ammonium salt in the system can be recycled, a new process for preparing battery grade nickel sulfate without wastewater, waste residues and extraction is realized, and the production cost is greatly reduced.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy and relates to a green method for preparing battery-grade nickel sulfate from nickel salt. Background technique [0002] Nickel salt is one of the main raw materials of nickel hydrometallurgy process. Compared with other nickel materials such as nickel sulfide and white alloy materials, nickel salt has the advantages of rapid dissolution and low process requirements. At the same time, as an alkaline material raw material, it can be used as pH adjuster to use. At present, the main technologies for treating nickel salt in industrial production are: acid leaching-removing iron-extracting nickel-removing impurities-electrodeposition to prepare nickel products. In this process, all metals in the acid leaching process will react quickly with acid, and there are many impurities in the solution after leaching. Impurities such as Fe, Mn, Mg, Ca cannot be separated from the main metal during the leaching pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/14C22B3/44C22B23/00C22B26/22C01G53/10
CPCC01G53/10C22B3/14C22B3/44C22B23/0446C22B23/0461C22B26/22Y02P10/20
Inventor 刘永东胡雷赵鑫姜俊陈宇乾裴晶晶钟利民
Owner 취저우화여우코발트뉴머터리얼컴퍼니리미티드
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