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Method and device for deeply removing copper of nickel thiocarbonate from nickel-containing solution

A technology of thiocarbonic acid and nickel solution, which is applied in the field of copper-nickel hydrometallurgy, can solve the problems of short reaction time and failure to meet the requirements of copper removal, and achieve the goals of reducing labor intensity, simple copper removal operation process, and reducing heat loss Effect

Inactive Publication Date: 2012-10-10
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a similar operation method is also adopted, in order to ensure the production scale, that is, without reducing the processing capacity, when adding nickel thiocarbonate from the top of the equipment to remove copper, due to the large flow of the solution, it will reach every 75m 3 / h, the copper removal agent is bound to be quickly taken out by the solution, causing the reaction time to be too short, and the copper removal cannot meet the requirements

Method used

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  • Method and device for deeply removing copper of nickel thiocarbonate from nickel-containing solution

Examples

Experimental program
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Effect test

Embodiment 1

[0027] First adjust the pH value of the nickel electrolytic anolyte with a nickel concentration of 70g / l to 4.0, and then mix it with Na 2 CS 3 The solution was mixed and reacted for 10 minutes to obtain a nickel thiocarbonate slurry with a thiocarbonate concentration of 0.5 mol / l as a copper removal agent; then the pH of the nickel electrolytic anolyte with a copper concentration of 0.5 g / l was adjusted to 4.5, and the temperature was heated to 60°C; then mix according to the molar ratio of thiocarbonate in the copper removal agent to copper in the nickel electrolysis anolyte is 1.3, and control the feeding speed of the nickel thiocarbonate slurry feed pump to 1.56m 3 / h, inject it into the nickel-containing solution feed pipe, and mix it with the nickel electrolysis anolyte at 76.56m 3 / h feed rate [that is, the flow rate of the mixed solution V (m 3 / h)] was injected into a pipe reactor with a diameter of 40cm and a length of 305m through a nickel-containing solution feed...

Embodiment 2

[0029] First adjust the pH value of the nickel sulfate solution with a nickel concentration of 70g / l to 5.0, and then mix it with Na 2 CS 3 The solution was mixed and reacted for 20 minutes to obtain a nickel thiocarbonate slurry with a thiocarbonate concentration of 1.2mol / l as a copper removal agent; then the pH of the nickel electrolytic anolyte with a copper concentration of 0.6g / l was adjusted to 5.0, and the temperature was heated to 65°C; then mix according to the molar ratio of thiocarbonate in the copper removal agent to copper in the nickel electrolysis anolyte as 1.4, and control the feeding speed of the nickel thiocarbonate slurry feed pump to 0.82m 3 / h, inject it into the nickel-containing solution feed pipe, and mix it with the nickel electrolysis anolyte at 75.82m 3 / h feed rate [that is, the flow rate of the mixed solution V (m 3 / h)] was injected into a pipe reactor with a diameter of 30cm and a length of 268m through a nickel-containing solution feed pump,...

Embodiment 3

[0031] First adjust the pH value of the nickel electrolytic anolyte with a nickel concentration of 70g / l to 5.0, and then mix it with Na 2 C 2 S 5 The solution was mixed and reacted for 15 minutes to obtain a nickel thiocarbonate slurry with a thiocarbonate concentration of 0.8mol / l as a copper removal agent; then the pH of the nickel electrolytic anolyte with a copper concentration of 0.5g / l was adjusted to 4.8, and the temperature was heated to 60°C; then mix according to the molar ratio of thiocarbonate in the copper removal agent to copper in the nickel electrolysis anolyte as 1.2, and control the feeding speed of the nickel thiocarbonate slurry feed pump to 0.82m 3 / h, inject it into the nickel-containing solution feed pipe, and mix it with the nickel electrolysis anolyte at 75.82m 3 / h feed rate [that is, the flow rate of the mixed solution V (m 3 / h)] was injected into a pipe reactor with a diameter of 35cm and a length of 329m through a nickel-containing solution fe...

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Abstract

The invention discloses a method and device for deeply removing copper of nickel thiocarbonate from a nickel-containing solution. Substantially, the nickel thiocarbonate after pulping is used as a copper removal agent; and the copper removal agent is automatically added through a mechanical mixing pump and is uniformly mixed with the nickel-containing solution in a pipeline reactor to remove copper. The method can realize continuous copper removal in the closed environment, the copper removal efficiency is high, and the concentration of the liquid cooper after copper removal is lower than 3mg / l. The copper-nickel ratio in the copper removal slag is greater than 15, thereby completely meeting the production requirements.

Description

technical field [0001] The invention relates to the field of copper-nickel hydrometallurgy, in particular to a technical method and a device for deep separation of copper-nickel from a copper-nickel mixed solution. Background technique [0002] As an element with similar chemical properties, copper and nickel are separated efficiently, which has long been a problem that has plagued the metallurgical industry at home and abroad. my country's electric nickel standard (GB / T6516-1997Ni9996) has very strict requirements on the content of impurities, especially the content of copper impurities is required to be less than 0.01%. This requires deep removal of impurity copper in nickel electrolysis anolyte before nickel electrowinning. In response to this problem, my country has listed this research as a key research project twice in the "Eighth Five-Year Plan" and "Ninth Five-Year Plan", and has tried various methods, but has not been well resolved. Therefore, in 2004, Jinchuan Co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/44C22B23/00
CPCY02P10/20
Inventor 陈星宇赵中伟何利华
Owner CENT SOUTH UNIV
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