Method of removing copper from nickel chloride leachate

A technology of chlorinated leaching and leaching solution, applied in nickel halide and other directions, can solve problems such as difficulty in chlorine gas recovery, environmental pollution, and inability to meet the production requirements of nickel chloride, and achieve the effect of solving pollution and the impact on employees' health.

Inactive Publication Date: 2008-02-20
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 sodium sulfide or sodium sulfide to remove copper. After copper removal, sodium ions will be brought into the solution, which will affect the quality of the solution. At the same time, a large amount of hydrogen sulfide gas will be released, polluting the environment and affecting the health of employees; copper removal by electrowinning It can only make the concentration of copper ions in the solution reach 10-15g / l, which cannot meet the subsequent production requirements of nickel chloride, and the recovery of the produced chlorine gas is difficult; The effect is best when the copper ion concentration is less than 3g / l, which is not suitable for the treatment of high-copper nickel chloride leaching solution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Heat the chlorinated leaching solution to 80°C, add nickel concentrate according to 6 times the weight of copper in the leaching solution, and add leaching slag at the same time when adding nickel concentrate, the volume ratio of adding nickel concentrate and leaching slag is 5:1 . Control the oxidation-reduction potential below -50mv, react for 1.2 hours, carry out hydraulic filtration and separation of the slag, and obtain a nickel chloride leachate containing less than 1g / l copper.

[0013] Statistics of Ni and Cu content in solution before and after copper removal g / l

[0014]

Embodiment 2

[0016] Heat the chlorinated leaching solution to 84°C, add nickel concentrate according to 6.4 times the weight of copper in the leaching solution, and add leaching slag at the same time when adding nickel concentrate, the volume ratio of adding nickel concentrate and leaching slag is 4.7:1 . Control the oxidation-reduction potential below -65mv, react for 1.5 hours, carry out hydraulic filtration and separation of the slag, and obtain a nickel chloride leachate containing less than 1g / l of copper.

[0017] Statistics of Ni and Cu content in solution before and after copper removal g / l

[0018]

Embodiment 3

[0020] Heat the chlorinated leaching solution to 89°C, add nickel concentrate according to 6.7 times the weight of copper in the leaching solution, and add leaching slag at the same time when adding nickel concentrate, the volume ratio of adding nickel concentrate and leaching slag is 4.5:1 . Control the oxidation-reduction potential below -85mv, react for 1. hour, carry out slag hydraulic filtration and separation, and obtain nickel chloride leaching solution containing copper below 1g / l.

[0021] Statistics of Ni and Cu content in solution before and after copper removal g / l

[0022]

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PUM

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Abstract

A method to remove copper in nickelous chloride lixivium relates to a method to remove impurities from chlorination medium, in particular to a method to remove copper in nickelous chloride lixivium with nickel ore concentrate, which is characterized in that the chlorination lixivium is heated to 80-95 DEG C, nickel ore concentrate and lixiviated slag are added into the chlorination lixivium according to volume ratio of 5:1, oxidation-reduction potential is controlled to be below -50mv, the reaction lasts for 1-2h and the nickelous chloride lixivium containing less than 1 g / l copper is obtained after pressure filtration and separation of slag and solution. The method of the invention realizes the purpose of removing copper from nickelous chloride lixivium, produces solution that meets the requirements of deep copper removal process and solves the problems of effect of harmful gases on the environment and the health of workers.

Description

technical field [0001] The invention relates to a method for removing copper in a nickel chloride leaching solution, relating to a method for removing impurities in a chlorination medium, in particular to a method for removing copper in a nickel chloride leaching solution by using nickel concentrate. Background technique [0002] In the production process of nickel chloride leaching, the concentration of copper ions in the chloride leaching solution is generally 50-80g / l. The copper ions in the chlorinated leachate can be removed by chemical precipitation, electrowinning copper removal, and extraction. The chemical precipitation method uses sodium sulfide or sodium sulfide to remove copper. After copper removal, sodium ions will be brought into the solution, which will affect the quality of the solution. At the same time, a large amount of hydrogen sulfide gas will be released, polluting the environment and affecting the health of employees; copper removal by electrowinning ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/09
Inventor 王定录曹增城
Owner JINCHUAN GROUP LIMITED
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