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Method for producing low-loose-specific-weight copper powder by using recycled waste copper sand material

A low-loose, copper powder technology, applied in the field of copper powder production by recycling waste copper sand, can solve the problems of long process flow, high production cost, high energy consumption, etc., and achieves short process flow, convenient operation and simple process Effect

Inactive Publication Date: 2015-05-06
FUJIAN ZIXIN METAL MSTAR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process is long and complex, with high energy consumption and high production cost, especially the smelting and water atomization process consumes a lot of power, and the particles have poor dendritic shape, the specific area is not developed, and the compressibility and sintering activity are also poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Raw materials: High-purity copper particle waste produced by electrolytic recovery in the production process of copper products enterprises. The particle size is between 5-10mm, and the purity requirement is 99.95%.

[0015] Sorting and removing impurities: sorting and checking visible impurities in high-purity electrolytic copper particles, such as packaging lines, etc.

[0016] Counter-roller tableting: The high-purity electrolytic copper particles are ground and pressed by a 40-ton multi-stage counter-roller to a thin sheet of about 200um.

[0017] Oxidation: Grind and press high-purity electrolytic copper particles to about 200um flakes and send them to oxidation equipment to add oxygen or H 2 o 2 Oxidation by heating to 500°C in an oxidation furnace. According to the thickness of the material, after fully oxidizing for 2 hours, a loose and easily broken copper oxide sheet is obtained.

[0018] Grinding: After cooling the copper oxide flakes obtained from the ox...

Embodiment 2

[0022] Raw materials: High-purity copper particle waste produced by electrolytic recovery in the production process of copper products enterprises.

[0023] The particle size is 5-10mm, and the purity requirement is above 99.95%.

[0024] Sorting and removing impurities: sorting and checking visible impurities in high-purity electrolytic copper particles, such as packaging lines, etc.

[0025] Counter-roller tableting: The high-purity electrolytic copper particles are ground and pressed by a 40-ton multi-stage counter-roller to a thin sheet of about 200um.

[0026] Oxidation: Grind and press high-purity electrolytic copper particles to about 200um flakes and send them to oxidation equipment to add oxygen or H 2 o 2 Oxidation by heating to 700°C in an oxidation furnace. According to the thickness of the material, after fully oxidizing for 4 hours, a loose and easily broken copper oxide sheet is obtained.

[0027] Grinding: After cooling the copper oxide flakes obtained by t...

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Abstract

The invention discloses a method for producing low-loose-specific-weight copper powder by using recycled waste copper sand materials and relates to a method for waste copper utilization, in particular to a method for producing copper powder by using recycled waste copper sand materials. High-purity electrolytic copper particles recycled during wastewater treatment are used as raw materials, and low-loose-specific-weight copper powder finished products are produced through sorting and impurity removal, pair roller tableting, oxidization, grinding, reduction and crushing and screening. The method for producing low-loose-specific-weight copper powder by using recycled waste copper sand materials has the advantages that the process is simple, the operation is convenient to conduct, the equipment is simple, the process flow is short, no pollution is caused during production, the purity of the produced copper powder is high, the performance of the low-loose-specific-weight copper powder is close to that of electrolytic copper powder, and the method is in compliance with environmental protection policies on energy saving, environmental protection, circular economy and transformation from wastes to valuable things.

Description

technical field [0001] The invention relates to a method for utilizing waste copper, in particular to a method for producing copper powder by utilizing recycled waste copper sand materials. Background technique [0002] Metal copper powder is widely used in diamond tools, electric carbon products, friction materials, oil bearings, conductive inks and other powder metallurgy products industries. The lower the bulk density of the copper powder, the better the compressibility, forming filling and sintering activity. At present, there are mainly two production methods of copper powder in China: electrolysis method and water atomization reduction method. Electrolysis method: The particles of copper powder obtained by electrolysis are dendritic, with developed specific surface, so the compressibility and sintering activity are excellent, but the fluidity is poor, especially the sulfate solution used in production will seriously pollute the environment, and the production power con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/22
Inventor 王忠
Owner FUJIAN ZIXIN METAL MSTAR TECH
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