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Purification method of cobalt nickel hydroxide hydrochloric acid leaching solution

A technology of nickel-cobalt hydroxide hydrochloric acid and leaching solution, applied in the purification of leaching solution, the purification of nickel-cobalt hydroxide hydrochloric acid leaching solution, and the production of nickel chloride products, can solve the problems such as the failure of nickel chloride to be popularized, and achieve the elimination of major dangers The effect of shortening the source and process flow and preventing pollution

Active Publication Date: 2014-10-01
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the field of nickel chloride production, due to the high content of impurities such as cobalt, magnesium, manganese, zinc and other impurities in the nickel cobalt hydroxide raw materials produced by the transformation of laterite nickel ore, due to the failure to find a suitable hydrochloric acid leach solution purification process, the use of laterite nickel The production of nickel chloride from nickel hydroxide and cobalt produced by mine transformation has not been popularized

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for purifying nickel hydroxide cobalt hydrochloric acid leaching solution, comprising the following process steps:

[0027] Step 1: Use industrial concentrated hydrochloric acid with a molar concentration of 8mol / L to dissolve and leach the nickel cobalt hydroxide raw material produced by the transformation of laterite nickel ore, control the pH value of the leached solution to 4.3, and then filter the solution to obtain nickel A leach solution with a content of 150g / L;

[0028] Step 2: adding barium chloride to the leaching solution to carry out the sulfate removal operation, after the sulfate removal, the solution is press-filtered and used as the pre-extraction liquid for subsequent use; the amount of barium chloride added is calculated according to the sulfate content of the sulfate removal pre-liquid, Ensure that the sulfate content in the solution after removing the sulfate is below 20g / L;

[0029] Step 3: Follow the P 507 : Sulfonated kerosene=25%:...

Embodiment 2

[0033] The difference between embodiment 2 and embodiment 1 is:

[0034] In step 1, the nickel hydroxide cobalt raw material produced by the transformation of laterite nickel ore is dissolved and leached by industrial concentrated hydrochloric acid with a molar concentration of 9 mol / L, and the pH value of the leached solution is controlled to be 4.5, and then the solution is press-filtered to obtain The leach solution with a nickel content of 164g / L;

[0035] In step 3, according to sodium saponification rate 70%, metering and adding mass concentration is the sodium hydroxide solution of 30% to carry out saponification, and the organic phase after saponification reacts with the pure nickel chloride solution of nickel content at 100g / L to make nickel soap;

[0036] In step 4, be that the dilute hydrochloric acid of 0.5mol / L carries out 3 grades of washing sodium to the nickel soap that step 3 makes with molar concentration, to remove the sodium ion in the liquid after nic...

Embodiment 3

[0038] The difference between embodiment 3 and embodiment 1 is:

[0039] In step 1, the nickel cobalt hydroxide raw material produced by the transformation of laterite nickel ore is dissolved and leached by industrial concentrated hydrochloric acid with a molar concentration of 10 mol / L, and the pH value of the leached solution is controlled to be 4.0, and then the solution is press-filtered to obtain Leaching solution with a nickel content of 170g / L;

[0040] In step 3, according to sodium saponification rate 75%, metering and adding mass concentration is 30% sodium hydroxide solution to carry out saponification, and the organic phase after saponification reacts with the pure nickel chloride solution of nickel content at 110g / L to make nickel soap;

[0041] In step 4, be that the dilute hydrochloric acid of 1.0mol / L carries out 3 grades of washing sodium to the nickel soap that step 3 makes with molar concentration, to remove the sodium ion in the liquid after nickel soap, a...

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PUM

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Abstract

The invention discloses a purification method of a cobalt nickel hydroxide hydrochloric acid leaching solution. The purification method mainly comprises the following processing steps: I. dissolving and leaching a cobalt nickel hydroxide raw material produced by laterite-nickel ore transformation through industrial concentrated hydrochloric acid; II. adding barium chloride to a leaching solution and implementing sulfate radical removal operation; filter-pressing the solution and reserving the solution as an extracting pre-solution for later use; III. preparing an organic phase at ratio of 25% to 75% of P5O7 to sulfonated kerosene; saponifying the prepared organic phase in a soda soap kettle; reacting the saponified organic phase with a pure nickel chloride solution to obtain nickel soap; and IV. extracting the nickel chloride extracting pre-solution obtained from the step II through the P507 nickel soap, wherein the extracting solution obtained is a finished pure nickel chloride solution. The production process disclosed by the invention is safe and the extracting solution produced is better in component; and moreover, the purification method is short in technological process and more effective in process control.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous hydrometallurgy, and relates to a method for purifying a nickel hydroxide cobalt hydroxide hydrochloric acid leaching solution, in particular to a method for purifying a leach solution obtained by leaching a nickel cobalt hydroxide raw material produced from laterite nickel ore through hydrochloric acid leaching. The purified solution can be directly used to produce nickel chloride products. Background technique [0002] Due to the depletion of sulfide nickel ore resources, laterite nickel ore has become the main resource of nickel raw materials due to its large reserves and easy mining. Nickel hydroxide and cobalt raw materials produced by the transformation of laterite nickel ore are gradually becoming the main raw materials for nickel salt production enterprises to produce nickel salt products because the price is lower than that of nickel raw materials produced by nickel sulfide ore. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/10C22B3/40C22B23/00
CPCY02P10/20
Inventor 陈胜维张国勇王永铸时金秋任伟谭卫民曹增成孙正德
Owner JINCHUAN GROUP LIMITED
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