Copper electrolyte purification method

A technology for copper electrolyte and decopper solution, applied in the field of copper smelting, can solve the problems of high energy consumption of equipment, the inability of purified liquid products to meet the quality requirements of electrolytic refining products, and poor removal capacity, and to improve the removal rate. Effect

Inactive Publication Date: 2020-03-31
CHINA NERIN ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although the existing copper electrolyte purification methods can remove arsenic, antimony, bismuth, nickel and other impurities to a certain extent, their removal ability is poor, the energy consumption of equipment is high, and the clean liquid product cannot meet the quality requirements of electrolytic refining products

Method used

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Effect test

Embodiment 1

[0027] see figure 1 , the present invention proposes a copper electrolyte purification method, which is applied to the treatment of copper electrolyte, comprising the following steps:

[0028] (1) Dividing the copper electrolyte into a first component and a second component, performing a decopper electrowinning process on the first component, and performing the decopper electrowinning on the decoppered liquid circulation Treating and obtaining the decoppered liquid and standard copper, and performing the decoppering electrowinning process on the decoppered liquid until the copper ion concentration drops below 40g / L;

[0029] (2) Carry out vacuum evaporation and concentration to the second component to obtain a concentrated liquid, which is water-cooled and crystallized and separated to obtain crude copper sulfate and crystallization mother liquor;

[0030] (3) Mix the crystallization mother liquor with the pre-stored decopper and impurity removal final liquid, perform decoppe...

Embodiment 2

[0045] Embodiment 2 is basically the same as Embodiment 1, the difference is:

[0046] The vacuum evaporation concentration in the step (2) is to concentrate the original solution to a specific gravity of 1.5 × 10 3 kg / m 3 .

Embodiment 3

[0048] Embodiment 3 is basically the same as Embodiment 1, the difference is:

[0049] The vacuum evaporation concentration in the step (2) is to concentrate the original solution to a specific gravity of 1.4 × 10 3 kg / m 3 .

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Abstract

The invention discloses a copper electrolyte purification method. The method is applied to treating of a copper electrolyte. The method comprises the following steps of firstly, dividing the copper electrolyte into a first component and a second component, executing decoppering electrodeposition treatment on the first component, and obtaining liquid after electrodeposition and standard copper; secondly, carrying out vacuum evaporation concentration on the second component, obtaining liquid after concentration, carrying out water cooling crystallization and separating on the liquid after concentration, and obtaining rough copper sulfate and crystallization mother liquor; thirdly, mixing the crystallization mother liquor and pre-stored decoppering impurity-removal final liquid, executing decoppering impurity-removal treatment, and obtaining liquid after decoppering impurity-removal, and black copper powder, and filtering and removing the black copper powder; and fourthly, performing freezing crystallization on the liquid after decoppering impurity removal, and obtaining crude nickel sulfate and purified final liquid. The copper electrolyte is divided into two components, decopperingelectrodeposition and decoppering impurity removal are carried out, and the removal rate of copper, arsenic, antimony, bismuth and nickel in the copper electrolyte is improved.

Description

technical field [0001] The invention relates to the technical field of copper smelting, in particular to a copper electrolyte purification method. Background technique [0002] In the copper smelting process, copper electrolytic refining is an essential link, in which copper electrolyte is needed to realize copper smelting. [0003] During the continuous process of copper electrolytic refining, the concentration of impurities such as arsenic, antimony, bismuth and nickel in the copper electrolyte will continue to increase, resulting in a decline in the quality of electrical copper. In view of the above problems, it is necessary to take part of the copper electrolyte for purification, and then return the purified liquid to the refining system to reduce the concentration of heavy metals in the electrolyte. The traditional purification method is to directly remove impurities such as arsenic, antimony, bismuth, and nickel in the copper electrolyte through decopper and impurity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C7/06C25C1/12C22B15/00C22B23/00C22B7/00
CPCC22B7/006C22B15/0086C22B23/0453C25C1/12C25C7/06Y02P10/20
Inventor 陈波邓文涛付伟岸高文娟
Owner CHINA NERIN ENG
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