Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for recycling copper from copper-steel back bimetal waste through wet process

A metal scrap and bimetallic technology, which is applied to the improvement of process efficiency, photographic technology, instruments, etc., can solve the problems of serious loss of steel materials, environmental pollution, etc., and achieve the effect of short process, environmental friendliness and low operating cost

Inactive Publication Date: 2011-05-04
SHANGHAI UNIV
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the melting method has a very serious loss of steel materials, and the melting process has caused great pollution to the environment.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Use a degreasing agent to remove the residual oil stains on the surface of the copper-steel back bimetal scrap;

[0022] (2) Dissolve a certain amount of copper sulfate in water, and then 2+ : NH 3 = 1:7 ratio of ammonia water was added to make cuproammonia solution, and then a certain amount of ammonium sulfate was added to obtain Cu 2+ Concentration is 1.2mol / L, (NH 4 ) 2 SO 4 Leaching solution with a concentration of 1.0mol / L;

[0023] (3) Put the degreased metal scraps in the leaching solution. During the leaching process, an appropriate amount of air is introduced, and the leaching temperature is 40°C. After the leaching is completed, the remaining scrap steel is taken out, and the leaching solution is properly treated as the electrolyte for the next process;

[0024] (4) Add gelatin to the above leaching solution at a concentration of 20mg / L, mix well and place it in the electrolytic cell as an electrolyte, adjust the pH value of the solution to be betwe...

Embodiment 2

[0029] (1) Use a degreasing agent to remove the residual oil stains on the surface of the metal scrap;

[0030] (2) According to Cu 2+ : NH 3 = 1:6 ratio of ammonia water was added to the copper sulfate solution, and then a certain amount of ammonium sulfate was added to obtain Cu 2+ The concentration is 1.0mol / L, (NH 4 ) 2 SO 4 Leaching solution with a concentration of 0.8mol / L;

[0031] (3) Put the degreased metal scrap in the leaching solution. During the leaching process, an appropriate amount of air is introduced, and the leaching temperature is 50°C. After the leaching is completed, the remaining scrap steel is taken out, and the leaching solution is properly treated as the electrolyte for the next process;

[0032] (4) Add thiourea with a content of 50 mg / L to the above leaching solution, mix well and place it in the electrolytic cell as an electrolyte, adjust the pH value of the solution to be between 9 and 11, use stainless steel as the cathode, and graphite as t...

Embodiment 3

[0037] (1) Use a degreasing agent to remove the residual oil stains on the surface of the metal scrap;

[0038] (2) According to Cu 2+ : NH 3 = 1:5 ratio of ammonia water is added to the copper sulfate solution, and then a certain amount of ammonium sulfate is added to obtain Cu 2+ The concentration is 0.8mol / L, (NH 4 ) 2 SO 4 Leaching solution with a concentration of 0.5mol / L;

[0039] (3) Put the degreased metal scraps in the leaching solution. During the leaching process, an appropriate amount of air is introduced, and the leaching temperature is 60°C. After the leaching is completed, the remaining scrap steel is taken out, and the leaching solution is properly treated as the electrolyte for the next process;

[0040] (4) Add β-naphthol with a content of 30mg / L to the above leaching solution, mix well and place it in the electrolytic cell as an electrolyte, adjust the pH value of the solution between 9 and 11, use stainless steel as the cathode, and graphite as the ano...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
purityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for recycling copper from copper-steel back bimetal waste through a wet process, belonging to the technical field of metal secondary resource recovery. The method comprises the following steps: preparing leaching agent to soak waste at 40-60 DEG C while introducing a defined amount of air, wherein the Cu<2+> concentration of the leaching agent is 0.8-1.2mol / L and (NH4)2SO4 concentration of the leaching agent is 0.5-1.0mol / L and the molar ratio of Cu<2+> to NH3 is 1:5-1:7; taking out waste steel after converting all the copper of the waste in the solution to obtain secondary steel; adding proper additives in leachate to fully mix, adjusting the pH value of the solution to prepare electrolyte, electrolyzing to extract copper, wherein the pH value of the electrolyte is controlled to 9-11, the temperature of electrolysis is controlled to 30-50 DEG C, the cell voltage is 2.5-3.3V, the current density is 250-350A / m<2> and electrolytic copper with the purity of 99.95% can be obtained through electrolysis under the conditions. Compared with the pyrometallurgical recovery, the method in the invention has the advantages of high metal yield, less pollution and simple technology.

Description

technical field [0001] The invention relates to a new method for recovering metal copper from copper-steel back bimetallic waste, which uses ammonia immersion method and cuproammonia solution to directly electrolytically extract and recover metal copper, and belongs to the technical field of metal secondary resource recovery. Background technique [0002] Copper-steel back bimetallic material refers to a composite material covered with a layer of copper alloy on the surface of steel. The alloy is compounded on the steel base as a wear-reducing and wear-resistant alloy surface layer, which is developed based on the research of self-lubricating materials. As a high-tech material, copper-steel back bimetal has copper alloy on the working surface and steel on the non-working surface. It has both the performance of copper alloy and steel, so the comprehensive performance of the parts is greatly improved. Since the copper-steel back bimetallic material has the advantages of both ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C25C1/12
CPCY02P10/20
Inventor 谈定生刘国永毕鹏飞
Owner SHANGHAI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com