Process for cleaning decopper nickel electrolytic solution

A technology of nickel electrolyte and copper removal agent, which is applied in photography process, instrument, photography auxiliary process, etc., can solve the problems of unfavorable system balance, short reaction time, etc., so as to improve the direct yield, improve the recovery rate, and facilitate the source of raw materials. Effect

Active Publication Date: 2005-03-23
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, sodium thiosulfate has good copper removal effect, short reaction time, and good working conditions, but it brings a lot of sodium ions into the solution system, which is unfavorable to the system balance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Preparation method one of nickel thiosulfate

[0026] Weigh an appropriate amount of NiCO 3 Placed in sulfurous acid solution to convert it into nickel sulfite first, then add excess sulfur powder. Under the action of a catalyst, heat to reflux for a certain period of time, cool to room temperature, filter to remove the residue, and collect the filtrate. Tests proved that the filtrate contained a certain concentration of thiosulfate ions. Repeat the experiment, when the concentration fluctuates between 0.5-1.8moL, the direct recovery rate is 50%-75% in terms of nickel.

Embodiment 2

[0028] Preparation method two of nickel thiosulfate

[0029] (1) Preparation of barium thiosulfate

[0030] Searching for BaS by Orthogonal Experimental Method 2 o 3 The best preparation conditions for

[0031] A

B

C

Proportion (mol / mol)

temperature °C

time min

1

0.98∶1

20

5

2

1∶1

30

10

3

1∶0.98

40

15

[0032] Note: ratio refers to Na 2 S 2 o 3 ·5H 2 O and BaCl 2 2H 2 The molar ratio of O is known from analysis, scheme C 2 A 2 B 1 for the best. which is:

[0033] ① Proportion 1:1

[0034] ②Temperature 20°C (close to room temperature)

[0035] ③The stirring time is 10min in order to obtain relatively pure BaS 2 o 3 , the BaS 2 o 3 Rinse 2 to 3 times with hot water at about T≈60°C.

[0036] (2) Preparation of liquid nickel thiosulfate copper removal agent Orthogonal experiments are used to find the bes...

Embodiment 3

[0052] First, use sulfuric acid to adjust the value of the iron solution to a predetermined value, measure the solution, put it in a beaker, and place it in an electronic temperature-controlled water bath. And the temperature adjustment controller is preset to a predetermined temperature, and the temperature is raised while stirring slowly. When the temperature of the solution reaches the predetermined value, add an appropriate amount and start timing. After the reaction is completed, filter the solution and analyze the filtrate and residue components.

[0053] Exploratory test for copper removal by nickel thiosulfate copper removal agent, the copper removal conditions are: reaction temperature 60°C, reaction time 15min, solution pH control between 3.5 and 4.0, liquid volume after iron removal 600ml, add liquid thiosulfuric acid Nickel copper remover 38ml, (containing S 2 o 3 2- 120g / l), where [S 2 o 3 2- ]: [Cu 2+ ](MR)=7:1,

[0054] The experimental results are liste...

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PUM

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Abstract

The invention relates to a purifying and removing impurity method with nickel electrolyte in the process of wet way metallurgy technics, especially purifying and removing copper with nickel electrolyte. It is adding NiS2O3 into nickel electrolyte to purify and remove copper, the technics process is adding NiS2O3 into nickel electrolyte according to the proportion of S2O3 2-/Cu2+ =4.4-7:1, at the temperature of 65-70deg.C, adding acid and adjusting Ph between 0.5 and 2, the stirring reaction time is 30-40min, finally separating and producing the deposition of CuS, attaining the liquid of purifying and removing copper. The thiosulfate is easily dissolved in water, it could not cause high content of nickel in the copper residues even excessive appending when removing copper, it is different from removing copper with nickel, nickel concentrate and sulfureted nickel, therefore with low nickel content in residues.

Description

technical field [0001] A method for removing copper from a nickel electrolyte relates to a method for purifying and removing impurities from an electrolyte in the process of producing metal nickel by a hydrometallurgical process, in particular to a method for purifying and removing copper from a nickel electrolyte. Background technique [0002] In wet nickel electrolysis, the solution components after iron removal are generally: Ni: 65-75g / L, Cu: 0.3-0.6g / L, Fe<0.001g / L, SO 4 2- : 100~120g / L, Cl - : 80~90g / L. In order to ensure the quality of electrolytic nickel, the method of nickel concentrate plus anode slime should be continuously adopted to remove copper. This method has good copper removal effect and fast reaction speed, which can basically meet the production requirements. However, due to the poor activity of the nickel concentrate, the replacement of the nickel concentrate is incomplete, resulting in a high nickel content in the copper removal slag, with an ave...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/44C25C1/08
CPCY02P10/20
Inventor 常全忠毛西康马岩赵彩霞
Owner JINCHUAN GROUP LIMITED
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