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5N high-purity copper production method

A production method and high-purity copper technology, applied in the field of electrolytic copper, can solve the problems of large acid mist, rising copper ion concentration, and high production costs

Inactive Publication Date: 2020-07-07
YANGGU XIANGGUANG COPPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 2) When the sulfuric acid system is used to electrolyze 5N high-purity copper, the concentration of sulfuric acid is maintained at about 180g / L, and the acid mist is relatively large; at the same time, the solubility in copper sulfate solution is good, and the anode will chemically dissolve, resulting in the concentration of copper ions in the electrolyte The rise is rapid; in order to stabilize the copper balance of the system, the electrolyte needs to be purified regularly, which increases production costs; and the excessively high concentration of copper ions in the sulfuric acid system causes anode passivation, which leads to the introduction of impurities in the cathode and affects the quality of cathode copper;
[0007] 3) When the nitric acid system is used to produce 5N high-purity copper by electrolysis, the impurity lead introduced in the raw material will be enriched in the electrolyte quickly; the continuous increase will affect the quality of cathode copper, and the electrolyte needs to be treated regularly to increase production costs;
[0008] 4) The existing technology uses 4N cathode copper with high copper content as raw material for further electrolytic production, and the production cost is relatively high

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0045] (1) Process the copper-containing 99.93% electrodeposited copper produced by the treatment of waste electrolyte into an anode plate that meets the electrolytic size requirements, wrap it with a 400-mesh filter bag as the anode, and use a titanium plate as the cathode;

[0046] (2) With 99.5% Cu(NO 3 ) 2 ·3H 2 O, analytical pure nitric acid configuration contains copper 65g / L, contains the electrolytic solution of acid 16.4g / L;

[0047] (3) After the cathode and anode are installed in the tank, add 20ppm bone glue and 48mg / L hydrochloric acid. After 36 hours of circulation, power on and electrolyze for 72 hours, with a current density of 151A / m 2 ;The electrolyte temperature is 21°C (room temperature) before electrification, and the electrolyte temperature is maintained at 37.4-38.6°C after electrification for 3 hours;

[0048] (4) After electrification, add bone glue 50g / t in the first 24h; add bone glue 45g / t in 25~48h; add bone glue 40g / t in 49~72h;

[0049] (5) C...

Embodiment 2

[0060] (1) Process the copper-containing 99.9% electrodeposited copper produced by the treatment of waste electrolyte into an anode plate that meets the electrolytic size requirements, wrap it with a 300-mesh filter bag as the anode, and use a titanium plate as the cathode;

[0061] (2) With 99.5% Cu(NO 3 ) 2 ·3H 2 O, analytical pure nitric acid is configured to contain copper 75g / L, the electrolytic solution containing acid 18g / L;

[0062] (3) After the cathode and anode are installed in the tank, add 20ppm bone glue and 48mg / L hydrochloric acid. After 36 hours of circulation, power on and electrolyze for 72 hours, with a current density of 151A / m 2 ;The electrolyte temperature is 21°C (room temperature) before electrification, and the electrolyte temperature is maintained at 37-39°C after electrification for 3 hours;

[0063] (4) After electrification, add bone glue 60g / t in the first 24h; 25~48h, add bone glue 55g / t; 49~72h, add bone glue 50g / t;

[0064] (5) Calculated ...

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Abstract

The invention provides a 5N high-purity copper production method. The 5N high-purity copper production method comprises the following steps that electro-deposited copper serves as an anode plate, andthe anode plate and a cathode plate are arranged in an electrolyte to be subjected to electrolysis; and the electrolyte comprises copper nitrate, water, nitric acid, bone glue and hydrochloric acid; and after electrolysis is finished, washing is conducted, and 5N high-purity copper is obtained. According to the provided 5N high-purity copper production method, the electro-deposited copper with thelow copper content can serve as the raw material to prepare 5N copper meeting the cathode copper national standard, the production cost is reduced, and resource waste is reduced.

Description

technical field [0001] The invention relates to the technical field of electrolytic copper, in particular to a production method of 5N high-purity copper. Background technique [0002] Copper is a soft metal with good ductility, high thermal conductivity and high electrical conductivity. It is the most commonly used material in the cable and electrical and electronic component industries. It can also be used as a building material and can be composed of many alloys. At the same time, copper is also a durable metal that can be recycled many times without compromising its mechanical properties. High-purity copper has more excellent properties, can meet the technical requirements of many modern cutting-edge technologies, and has been applied in many aspects with good results. Modern high-tech fields require improving the mechanical properties, corrosion resistance and surface properties of copper without sacrificing the electrical conductivity of copper. High-purity copper ha...

Claims

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Application Information

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IPC IPC(8): C25C1/12
CPCC25C1/12Y02P10/20
Inventor 宁万涛谢祥添左东平
Owner YANGGU XIANGGUANG COPPER
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