CN-121976259-A - Control method of electrolyte acid copper balance suitable for copper electrolysis production

CN121976259ACN 121976259 ACN121976259 ACN 121976259ACN-121976259-A

Abstract

The invention relates to the technical field of copper electrolytic refining, in particular to a control method of acid copper balance of electrolyte suitable for copper electrolytic production, which comprises the following steps of conveying electrolyte in an electrolytic production system to a first-stage decoppering front liquid tank through a pipeline pump for first-stage electrolytic copper removal, and generating a first-stage post-electrolytic solution and electrodeposited copper; the method comprises the steps of integrating 16 decoppering electrolytic tanks of two-stage decoppering in a clean liquid impurity removal system into a first-stage electrolytic deposition decoppering, flexibly carrying out first-stage electrolytic deposition/second-stage decoppering production according to the concentration of electrolyte copper ions, enabling a part of the first-stage electrolytic deposition solution to enter an independent circulating system of an electrolytic production system to participate in circulation, and realizing continuous and stable production of the electrolytic system under the conditions of 368A/m < 2 > high current density and Cu < 99.4 > high-grade anode plates, wherein copper which is originally opened in a coarse copper sulfate form is produced as high-quality electrolytic deposition copper, the quality of the electrolytic deposition copper reaches the A-grade copper standard, and the comprehensive recovery rate of copper of the electrolytic system is improved on the premise of realizing acid copper balance of the system.

Inventors

FENG MENGQIAN
QIAO YANGYANG
Dong kaituo
LI SHAOWEI
ZHANG LIANPING
Chang Shengchao
XU KAIYUAN
SUN SHANGLI
LI XIAOE

Assignees

金川集团永昌铜业有限公司
金川集团铜贵股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260127

Claims (5)

1. The method for controlling the acid copper balance of the electrolyte suitable for copper electrolysis production is characterized by comprising the following steps of: delivering electrolyte in the electrolytic production system to a first-stage decoppering front liquid tank through a pipeline pump to perform first-stage electrolytic copper removal, and generating a first-stage post-electrolytic liquid and electrolytic copper; The method comprises the steps of serially combining 16 copper removal electrolytic tanks of a secondary copper removal electrolytic system in a clean liquid impurity removal system into a primary electrolytic deposition copper removal electrolytic tank, and simultaneously retaining the original secondary copper removal, arsenic, antimony and bismuth functions of the electrolytic deposition electrolytic tank to realize flexible primary electrolytic deposition/secondary copper removal production according to the concentration of copper ions in the electrolytic solution; one part of the electrodeposited liquid enters an independent circulating system of the electrolytic production system to participate in circulation; the other part of the first-stage electrodeposited liquid enters a clean liquid impurity removing system for secondary decoppering to obtain recovered acid; the recovered acid is returned to the electrolytic production system for acid supplementation, so that the electrolytic production system realizes the acid balance of the electrolyte on the premise of not supplementing sulfuric acid.
2. The control method for acid copper balance of electrolyte suitable for copper electrolysis production according to claim 1, wherein the electrolysis production system is additionally provided with a section of electrolytic copper independent circulating system, and the control method comprises 16 sections of electrolytic copper deposition and removal electrolytic tanks, 1 section of copper removal pre-liquid tank, 1 section of copper removal post-liquid tank, 1 section of copper removal circulating pump and 1 section of copper removal post-liquid conveying pump.
3. The method for controlling acid copper balance of electrolyte suitable for copper electrolysis production according to claim 1, wherein 16 decoppering electrolytic tanks of two sections of decoppering in the clean liquid impurity removal system are serially combined into one section of electrodeposited copper, and the original secondary decoppering, arsenic, antimony and bismuth functions of the electrolytic copper can be maintained.
4. The method for controlling acid copper balance of electrolyte suitable for copper electrolysis production according to claim 1 is characterized in that one part of the first-stage decoppered liquid enters an independent circulating system of an electrolysis production system to participate in circulation, and the other part of the first-stage electrodeposited liquid enters a clean liquid impurity removal system to perform second-stage decoppered, so that recovered acid is obtained.
5. The method for controlling acid copper balance of electrolyte suitable for copper electrolysis production according to claim 1, wherein a circulating pump of an electrolysis production system can continuously feed a section of decoppering line, the circulating volume of a section of electrodeposited copper system is controlled to be 50L/tank.min by controlling the feeding volume, the copper content of the returned liquid is controlled to be 40g/L, and the grade A copper grade electrodeposited copper is produced.

Description

Control method of electrolyte acid copper balance suitable for copper electrolysis production Technical Field The invention relates to the technical field of copper electrolytic refining, in particular to a control method of acid copper balance of electrolyte suitable for copper electrolytic production. Background In the electrolytic production process, the copper ion concentration balance of the electrolyte is one of key quality control points, particularly under the production conditions of high-current density and high-grade anode plates, the electrolyte has the trend of continuously increasing the copper ion concentration and continuously reducing the acid, a large amount of coarse-grained acid copper is produced by simply removing copper by a clean liquid system, the copper-containing purpose of the electrolyte cannot be balanced if the electrolyte is redissolved, the comprehensive recovery rate of the copper of the electrolytic system is reduced if the electrolyte is externally paid, and large economic loss is caused, meanwhile, the acid balance of the electrolyte is maintained in a mode of supplementing new acid, the sulfuric acid consumption is large, and the electrolytic production cost is increased. Disclosure of Invention The invention provides a control method for acid copper balance of electrolyte suitable for copper electrolysis production, which overcomes the defects of the prior art and can effectively solve the problem of acid copper balance of electrolyte under the production conditions of high current density and high-grade anode plates. In order to solve the problems, the method for controlling the acid copper balance of the electrolyte suitable for copper electrolysis production comprises the following steps: delivering electrolyte in the electrolytic production system to a first-stage decoppering front liquid tank through a pipeline pump to perform first-stage electrolytic copper removal, and generating a first-stage post-electrolytic liquid and electrolytic copper; The method comprises the steps of serially combining 16 copper removal electrolytic tanks of a secondary copper removal electrolytic system in a clean liquid impurity removal system into a primary electrolytic deposition copper removal electrolytic tank, and simultaneously retaining the original secondary copper removal, arsenic, antimony and bismuth functions of the electrolytic deposition electrolytic tank to realize flexible primary electrolytic deposition/secondary copper removal production according to the concentration of copper ions in the electrolytic solution; one part of the electrodeposited liquid enters an independent circulating system of the electrolytic production system to participate in circulation; the other part of the first-stage electrodeposited liquid enters a clean liquid impurity removing system for secondary decoppering to obtain recovered acid; the recovered acid is returned to the electrolytic production system for acid supplementation, so that the electrolytic production system realizes the acid balance of the electrolyte on the premise of not supplementing sulfuric acid. The electrolytic production system is additionally provided with a one-section electrolytic copper deposition independent circulating system, and comprises 16 one-section electrolytic copper deposition electrolytic tanks, 1 one-section copper removal front liquid tank, 1 one-section copper removal rear liquid tank, 1 one-time copper removal circulating pump and 1 one-time copper removal rear liquid conveying pump. The 16 copper removal electrolytic tanks of the two-stage copper removal in the liquid purification and impurity removal system are serially combined into one-stage electrodeposited copper, and the original functions of secondary copper removal, arsenic removal, antimony removal and bismuth removal can be maintained. And one part of the first-stage decoppered liquid enters an independent circulating system of the electrolytic production system to participate in circulation, and the other part of the first-stage electrodeposited liquid enters a clean liquid impurity removal system to perform second-stage decoppered, so that recovered acid is obtained. The circulating pump of the electrolytic production system can continuously feed a section of copper removal line to supplement liquid, the circulating volume of the electrolytic copper deposition system is controlled to be 50L/tank/min by controlling the liquid supplementing volume, the copper content of the liquid is controlled to be 40g/L, and the grade A copper electro-deposition copper is produced. The invention realizes continuous and stable production of the electrolytic system under the conditions of 368A/m2 high current density and Cu99.4% high-grade anode plate, copper which is originally opened in a coarse copper sulfate form is produced by high-quality electrodeposited copper, the quality of the electrodeposited copper reaches the A-grade copper standard, and t