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Method for cleaning oxidized finished copper wires

A cleaning method and copper wire technology, applied in heat treatment furnaces, heat treatment equipment, furnace types, etc., can solve problems such as environmental pollution, cumbersome methods, and incomplete treatment.

Pending Publication Date: 2022-04-15
TONGDING INTERCONNECTION INFORMATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, physical methods or chemical methods can be used to remove copper oxide on the surface of copper wire. The physical method is to polish the surface with sandpaper to remove the oxide film. This method is cumbersome and incomplete.
The chemical method is to use chemical reagents to react with copper oxide to remove the copper oxide on the copper surface. The chemical reagents can be hydrochloric acid, dilute sulfuric acid, etc., or use carbon monoxide to reduce copper oxide. However, chemical methods to remove copper oxide have the problem of environmental pollution.

Method used

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  • Method for cleaning oxidized finished copper wires
  • Method for cleaning oxidized finished copper wires

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Effect test

Embodiment 1

[0031] An embodiment of the present invention provides a method for cleaning finished copper wire after oxidation, comprising the following steps:

[0032] (1) Wind the oxidized copper wire to be treated on the iron pan and put it in the furnace gall of the annealing furnace;

[0033] (2) Put industrial alcohol with a purity of 95% in a glass bottle with a capacity of 500ml, then place it in an annealing furnace, and vacuumize the furnace to minus 0.1MPa;

[0034] (3) Pass carbon dioxide into the furnace until the pressure in the furnace is 0.25MPa, and then heat it up,

[0035] Specifically, three heating points, upper, middle, and lower, are set in the annealing furnace to uniformly heat the furnace. Among them, the heating temperature of the upper phase is 420°C, the heating time is 80 minutes, and the holding time is 40 minutes; the heating temperature of the middle phase is 420°C, the heating time is 60min, and the holding time is 40min; the heating temperature of the lo...

Embodiment 2

[0039] An embodiment of the present invention provides a method for cleaning finished copper wire after oxidation, comprising the following steps:

[0040] (1) Wind the oxidized copper wire to be treated on the iron pan and put it in the furnace gall of the annealing furnace;

[0041] (2) Put industrial alcohol with a purity of 99% in a glass bottle with a capacity of 500ml, then place it in an annealing furnace, and vacuumize the furnace to minus 0.1MPa;

[0042] (3) Pass carbon dioxide into the furnace until the pressure in the furnace is 0.35MPa, then heat,

[0043] Specifically, three heating points, upper, middle and lower, are set in the annealing furnace to uniformly heat the furnace. Among them, the heating temperature of the upper phase is 590 ° C, the heating time is 80 min, and the holding time is 40 min; the heating temperature of the middle phase is 590°C, the heating time is 60min, and the holding time is 40min; the heating temperature of the lower phase is 590°...

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Abstract

The invention provides a method for cleaning a finished copper wire after oxidation, which comprises the following steps of: winding a to-be-treated copper oxide wire on an iron disc, and putting the iron disc into a furnace pipe of an annealing furnace; ethyl alcohol is added into the furnace pipe, and the interior of the furnace pipe is vacuumized to minus 0.1 MPa; then, carbon dioxide is introduced into the furnace pipe until the pressure in the furnace pipe ranges from 0.25 MPa to 0.35 MPa, heating is conducted till the temperature in the furnace pipe ranges from 420 DEG C to 590 DEG C, an upper heating point, a middle heating point and a lower heating point are arranged in the annealing furnace, the heating time of the upper phase is 80 min, and the heat preservation time is 40 min; the heating time of the middle phase is 60 minutes, and the heat preservation time is 40 minutes; the heating time of the lower phase is 60 minutes, and the heat preservation time is 40 minutes; and finally, gas in the annealing furnace is exhausted, the furnace pipe is taken out and cooled for not less than 12 hours, the iron disc is taken out, and the treated bright copper wire is obtained. Alcohol and carbon dioxide are added into the oxidized copper wire, so that the oxidized copper wire can be efficiently cleaned in a high-temperature annealing furnace, the copper wire can be recovered to be bright and clean, the subsequent application of the finished copper wire is not influenced, and the material is safe and environment-friendly, high in operation safety and environment-friendly.

Description

Technical field: [0001] The invention belongs to the technical field of finished copper wire processing and production, and in particular relates to a method for cleaning finished copper wire after oxidation. Background technique: [0002] China is the world's largest copper-consuming country, and 70% of the copper is imported from abroad. However, during the application of copper, especially in the production of wires and cables, the oxidation and discoloration of copper conductors is a long-standing problem. The finished copper wire is placed If it is not used for a period of time, the surface of the copper wire will be oxidized after being in contact with the air, which will cause the surface of the copper wire to turn black and cannot be used any longer. Therefore, it is very necessary to reduce the cost for the cleaning of copper wire for secondary utilization. In the prior art, physical methods or chemical methods can be used to remove the copper oxide on the surface ...

Claims

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Application Information

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IPC IPC(8): B21C37/04C21D9/52C22F1/08
CPCB21C37/04C21D9/525C22F1/08
Inventor 沈小平康继杨伟荣沈燕燕
Owner TONGDING INTERCONNECTION INFORMATION CO LTD
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