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Method for extracting copper from waste liquid generated during copper foil production

A technology of waste liquid and copper foil, which is applied to the improvement of process efficiency, photographic technology, instruments, etc., can solve the problems of large investment in copper extraction equipment, high impurities in copper, and secondary pollution, etc. High recovery rate and environmental protection effect

Inactive Publication Date: 2011-10-19
GUANGDONG FINE YUAN SCI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many disadvantages in this treatment method: 1. The extracted copper contains too many impurities and low purity, so it cannot be reused in the production of electrolytic copper foil, and can only be processed at a low price, resulting in cost loss; 2. The investment in copper extraction equipment is large, High energy consumption, complex process, difficult operation, and easy to cause secondary pollution

Method used

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  • Method for extracting copper from waste liquid generated during copper foil production
  • Method for extracting copper from waste liquid generated during copper foil production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Collect the waste copper sulfate solution produced in the production process, including the copper sulfate solution produced by running, escaping, leaking, and dripping in the production process, and inject it into the electrolytic cell 2. About 1000 liters of copper sulfate waste liquid are filled in the electrolytic cell of the present embodiment , the electrolytic cell 2 should be made of PVC material with good heat resistance, toughness resistance and ductility resistance, and the anode plate 3 should be completely immersed in the copper sulfate waste liquid; the anode plate 3 should have high acid resistance and high temperature resistance , high current performance, can be made of titanium anode material; add 50g of gelatin as the opening volume; open the air supply pipe valve 7 installed under the electrolytic cell 2, the compressed gas enters the electrolytic cell 2 through the perforated air intake pipe 4, Make the waste copper sulfate solution in motion; then t...

Embodiment 2

[0026] It is basically the same as in Example 1, except that 150 g of gelatin is added as the opening volume before the electrolysis starts; the electrolysis effect is basically the same.

Embodiment 3

[0028] It is basically the same as in Example 1, except that 100 g of gelatin is added as the opening volume before the electrolysis starts; the electrolysis effect is basically the same.

[0029] comparative experimental observation

[0030] When no gelatin is added in the electrolytic copper extraction of copper sulfate waste liquid, the density of copper crystals deposited on the cathode is relatively loose, and the crystal grains are easy to fall off at the bottom of the tank, and the cathode carrier is not easy to peel off.

[0031] After the addition of gelatin in the electrolytic copper extraction of copper sulfate waste liquid, the copper crystals deposited on the cathode are dense and smooth, and the crystal grains are not easy to fall off at the bottom of the tank, and are easy to peel off on the cathode carrier.

[0032] The electrolytic copper extraction equipment of copper sulfate waste liquid of the present invention occupies a small area, is easy to install, and...

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Abstract

The present invention discloses a method for extracting copper from a waste liquid generated during copper foil production, belonging to the technical field of metal extraction, and aims at providing a simple and high-efficiency method for extracting copper from the waste liquid generated during copper foil production. The technical essentials of the method comprises the following steps of: 1) collecting copper sulfate waste liquid generate during production process and injecting into an electrolytic cell; 2) adding gelatin 0.05-0.15 per mill of the copper sulfate waste liquid by weight; 3) placing anode and cathode boards and electrifying for electrolysis; and 4) stripping copper deposited on the cathode board after electrolysis. The method provided by the invention is used for recovering copper from the copper sulfate waste liquid.

Description

technical field [0001] The invention relates to a method for extracting copper, specifically, a method for extracting copper from waste liquid for producing copper foil, and belongs to the technical field of metal extraction. Background technique [0002] Electrolytic copper foil is an important basic material for the electronic information industry. The copper foil is prepared by dissolving high-purity copper to make copper sulfate electrolyte. In the special electrolytic equipment, the copper sulfate electrolyte is electrodeposited under the action of direct current to make the original foil; then the original foil is roughened according to the requirements. Electrolytic copper foil is made of a series of surface treatments such as heat resistance and oxidation resistance. [0003] In each step of raw foil production and surface treatment, there must be a washing process to remove the electrolyte attached to the surface, so a large amount of acidic wastewater is produced ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/12C25D21/18C22B7/00
CPCY02P10/20
Inventor 叶铭廖平元廖跃元刘少华温秋霞杨剑文
Owner GUANGDONG FINE YUAN SCI TECH CO LTD