Method for cleaning oxidized finished copper wires

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 ...

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.

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