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A method for crystallization and elution on the wall of copper electrolyte electroevaporation nickel removal tank

An elution method and technology of copper electrolyte, applied in electrolysis components, electrolysis process, instruments, etc., can solve problems such as production stoppage, and achieve the effect of reducing equipment start and stop

Active Publication Date: 2020-11-06
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for crystallization and elution on the wall of the nickel-removing tank by electroevaporation of copper electrolyte, so as to solve the problems of shutting down production and manually entering the nickel-removing tank to knock equipment for cleaning in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In the solution before nickel removal, the sulfuric acid concentration is 520g / L, the nickel ion concentration is 37.5g / L, and the copper ion concentration is 0.5g / L.

[0021] Step 1. Reduce the operating intensity of the electro-evaporation nickel removal tank to 20% of the actual operating capacity (electric power input), and at the same time reduce the liquid inlet speed before nickel removal to 60% of the original liquid inlet speed, so that the temperature of the nickel removal tank is lowered;

[0022] Step 2. When the temperature of the electric evaporation nickel removal tank drops to 100°C, add tap water when the solution enters the nickel removal tank. The speed of adding tap water is the same as that of the solution before the nickel removal described in step 1. The state is maintained until the acidity of the solution in the electro-evaporation nickel removal tank drops below 500g / L, and the state is maintained for 2 hours to run stably until the crystal diss...

Embodiment 2

[0025] In the solution before nickel removal, the sulfuric acid concentration is 450g / L, the nickel ion concentration is 25g / L, and the copper ion concentration is 0.3g / L.

[0026] Step 1. Reduce the operating intensity of the electro-evaporation nickel removal tank to 30% of the actual operating capacity (electric power input), and at the same time reduce the liquid inlet speed before nickel removal to 50% of the original liquid inlet speed, so that the temperature of the nickel removal tank is lowered;

[0027] Step 2. When the temperature of the electro-evaporation nickel removal tank drops to 120°C, add tap water when the solution enters the nickel removal tank. The state is maintained until the acidity of the solution in the electro-evaporation nickel removal tank drops below 400g / L, and the state is maintained for 4 hours to run stably until the crystal dissolution and elution become less or disappear;

[0028] Step 3. Continue to add pre-nickeling solution to the nickel...

Embodiment 3

[0030] In the solution before nickel removal, the sulfuric acid concentration is 390g / L, the nickel ion concentration is 30g / L, and the copper ion concentration is 0.3g / L.

[0031] Step 1. Reduce the operating intensity of the electro-evaporation nickel removal tank to 25% of the actual operating capacity (electric power input), and at the same time reduce the liquid inlet speed before nickel removal to 55% of the original liquid inlet speed, so that the temperature of the nickel removal tank is lowered;

[0032] Step 2. When the temperature of the electro-evaporation nickel removal tank drops to 120°C, add tap water when the solution enters the nickel removal tank. The state is maintained until the acidity of the solution in the electro-evaporation nickel removal tank drops below 450g / L, and the state is maintained for 3 hours to run stably until the crystal dissolution and elution become less or disappear;

[0033] Step 3. Continue to add pre-nickeling solution to the nickel...

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PUM

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Abstract

The invention discloses a method of cleaning removal of crystals on the wall of a copper electrolyte electric evaporation nickel removal tank, and belongs to the technical field of copper electrolytepurification electric evaporation. The method comprises the steps that the operation strength of the electric evaporation nickel removal tank and the entering speed of liquid which exists before nickel removal is conducted are reduced, and therefore the temperature of the nickel removal tank is reduced; after the temperature is reduced, tap water is added so that the crystals can be dissolved andremoved or can disappear; and the addition of the liquid which exists before nickel removal is conducted continues, the addition of the tap water stops, the internal temperature of the electric evaporation nickel removal tank is gradually increased, and then the acidity of a solution in the electric evaporation nickel removal tank is adjusted. By the adoption of the method, the technological parameters are adjusted in the production process, namely, the acidity and the temperature of the solution in the production process are reduced, and therefore the solution can have the dissolving capacityand automatically dissolve the crystals, the purpose that the crystals are dissolved to be automatically removed through cleaning is achieved, the operation that after the facility stops running, manual operation removal is conducted is not required, cleaning removal of the crystals is quickly achieved, suspend production treatment is not required, and the frequency of the operation which causesdamage to the facility, such as start and stop of the facility is reduced.

Description

technical field [0001] The invention belongs to the technical field of copper electrolyte purification and electroevaporation, and in particular relates to a crystallization and elution method on the wall of a nickel removal tank wall by electroevaporation of copper electrolyte. Background technique [0002] During the production process of electro-evaporation nickel removal of copper electrolyte, hard crystals will accumulate and precipitate on the tank wall and electrode graphite rod, which will affect the operating efficiency of the production system. When the crystallization is serious, it may cause short circuit of the electrode and high-temperature red-hot combustion of the electrode and other dangerous situations, and the treatment method is to stop the operation of the equipment, clean out the solution in the tank, set up a ventilation device, and after the personnel are well protected, enter the tank and hit with a sledgehammer to smash the crystals on the tank wall ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C7/06C25C1/12
CPCC25C1/12C25C7/06Y02P10/20
Inventor 杨晓亮肖银广陈芋霞李睿杜兵兵纪小平韩利平董开拓郭雅博向天龙
Owner JINCHUAN GROUP LIMITED
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