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A kind of method for deep copper removal of nickel hydroxide cobalt hydrochloric acid leaching solution

A technology of nickel-cobalt hydroxide hydrochloric acid and nickel-cobalt hydroxide is applied in the field of non-ferrous hydrometallurgy, which can solve the problems of limited application scope, inability to achieve deep copper removal, and inability to meet the requirements of subsequent procedures, and achieves simple operation and copper removal effect. The effect of obvious and easy industrial production

Active Publication Date: 2016-10-05
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical precipitation method uses the copper precipitation agent to form an insoluble salt with copper, and the copper is separated after filtration; the extraction method uses an extractant to separate copper ions. The most commonly used copper extractant in the hydrochloric acid system is N 235 , N 235 As an anion extractant, it can only extract and separate metal ions that can form chloride anions, such as copper, iron, cobalt, zinc, etc., and its scope of application is greatly limited
Especially when the content of calcium, magnesium and manganese in hydrochloric acid system is high, N 235 Extraction can no longer meet the requirements of subsequent processes
P 507 The extractant can extract a variety of metal ions, and the separation of valuable metals can be achieved by controlling different conditions. However, in the hydrochloric acid system, deep copper removal cannot be achieved only by adjusting the pH value, flow rate, and phase ratio.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) After the nickel cobalt hydroxide is leached with hydrochloric acid, the hydrochloric acid leaching solution is obtained. After analysis, the sulfate content in the nickel cobalt hydroxide hydrochloric acid leaching solution is 15g / L, and the nickel ion concentration is 155g / L. After adjustment, the solution sulfate radical content 35g / L forms pre-extraction solution, and after analysis, its copper content is 0.23g / L;

[0019] (2) Add nickel-cobalt hydroxide to the pre-extraction solution to adjust the pH value. After adjustment, the pH value of the solution is 4.0;

[0020] (3) Press-filter the pH-adjusted solution and saponify the P 507 The extraction agent is subjected to countercurrent extraction, the extraction ratio is 5:1, and the copper content of the raffinate is analyzed after extraction, which is 0.0018g / L.

Embodiment 2

[0022] (1) After the nickel cobalt hydroxide is leached with hydrochloric acid, the hydrochloric acid leaching solution is obtained. After analysis, the sulfate content in the nickel cobalt hydroxide hydrochloric acid leaching solution is 18g / L, and the nickel ion concentration is 162g / L. Adjustment, after adjustment, solution sulfate radical content 28g / L, forms the pre-extraction liquid, analyzes its copper content to be 0.19g / L;

[0023] (2) Add nickel-cobalt hydroxide to the pre-extraction solution to adjust the pH value. After adjustment, the pH value of the solution is 4.5;

[0024] (3) Press-filter the pH-adjusted solution and saponify the P 507 The extraction agent is subjected to countercurrent extraction, the extraction ratio is 4:1, and the copper content of the raffinate is analyzed after extraction, which is 0.0023g / L.

Embodiment 3

[0026] (1) After the nickel cobalt hydroxide is leached with hydrochloric acid, the hydrochloric acid leaching solution is obtained. After analysis, the sulfate content in the nickel cobalt hydroxide hydrochloric acid leaching solution is 21g / L, and the nickel ion concentration is 170g / L. Adjustment, after adjustment, solution sulfate content 25g / L, forms pre-extraction solution, analyzes its copper content to be 0.26g / L;

[0027] (2) Add nickel-cobalt hydroxide to the pre-extraction solution to adjust the pH value. After adjustment, the pH value of the solution is 4.2;

[0028] (3) Press-filter the pH-adjusted solution and saponify the P 507 The extraction agent is subjected to countercurrent extraction, the extraction ratio is 3:1, and the copper content of the raffinate is analyzed after extraction, which is 0.0035g / L.

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Abstract

The invention provides a method for deeply removing copper from nickel hydroxide cobalt hydrochloric acid leaching solution, which mainly includes the following process steps: (1) nickel hydroxide cobalt is leached with hydrochloric acid to obtain hydrochloric acid leaching solution, adding dilute sulfuric acid to the hydrochloric acid leaching solution to carry out sulfate Adjust to make the sulfate content in the solution reach 25-35g / L, and this solution is the pre-extraction solution; (2) add nickel hydroxide and cobalt raw materials to the pre-extraction solution to adjust the pH value, and control the addition of nickel and cobalt hydroxide so that The final pH of the solution is 4.0-4.5, and then the pre-extract solution is press-filtered to remove solid impurities; (3) The filtered pre-extract solution and the saponified P507 extractant are put into the extraction box for countercurrent extraction. The copper removal effect of the present invention is obvious, and the content of copper ions in the nickel chloride solution after copper removal can be reduced to below 0.004g / L, which can effectively meet the requirements for producing electroplating grade nickel chloride products; moreover, the method of the present invention is simple to operate and easy to industrialized production .

Description

technical field [0001] The invention belongs to the technical field of nonferrous hydrometallurgy, and relates to a method for deeply removing copper from nickel hydroxide cobalt hydrochloric acid leaching solution. 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. And in the method for producing nickel chloride solution, the hydrochloric acid leaching nickel hydroxide cobalt is the method that mainly adopts at present, but because the impurity content such as cobalt, magnesium, manganese, copper in the nickel hydroxide cobalt ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/26
CPCY02P10/20
Inventor 邢晓钟李宝平陈胜维王永铸任伟于红张国勇曹增成谭卫民
Owner JINCHUAN GROUP LIMITED
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