Method for recovering metal conductor from enameled wire

A technology of metal conductors and enameled wires, applied in recycling technology, electronic waste recycling, electrical components, etc., can solve problems such as insufficient purity of recycled products, environmental pollution sources, etc., to improve recovery rate and recycling quality, reduce pollution, and low consumption The effect that can be recycled

Active Publication Date: 2019-04-02
ELECTRIC WIRE & CABLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the technical defects faced by the prior art, the purpose of the present invention is to improve the recovery method of the metal conductor of the enameled wire, so as to overcome the defects of the prior art such as insufficient purity of the metal conductor recovery product and the generation of environmental pollution sources in the recovery process.

Method used

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  • Method for recovering metal conductor from enameled wire

Examples

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Effect test

Embodiment 1

[0039] Step S1 is a heat treatment step: the enameled wire is placed in a heat source environment, and the heat energy in the heat source environment is quickly transferred to the enameled wire through the heat source environment through heat conduction, heat radiation, etc., so that the paint film on the surface of the enameled wire is pyrolyzed and carbonized to obtain a heated Decarbonized paint film. The temperature of the heat source environment is 500°C, so that the paint film is pyrolyzed and carbonized after being heated, and the metal conductor material will not be melted due to heat, so as to avoid the melting of the metal conductor material due to the high temperature of the heat source environment. The decarburized paint films are melted and mixed with each other, causing subsequent troubles in the recovery of metal conductors.

[0040] In addition, the present invention places the enameled wire in a heat source environment for pyrolytic carbonization for 20 minute...

Embodiment 2

[0047] The method for recovering metal conductors from enameled wires in Example 2 is similar to the steps in Example 1, the difference being that the time for pyrolytic carbonization in the heat source environment is 25 minutes. In this embodiment, the immersion time of the heat-treated enameled wire placed in the aqueous solution containing the compound with sulfonic acid groups is 5 minutes, 10 minutes, and 15 minutes in sequence, and the peeling area of ​​the carbonized paint film at each stage 85%, 99% and 99.5%, respectively. The pyrolytic carbonized paint film on the surface of the metal conductor becomes less and less, and the surface of the metal conductor becomes cleaner. After soaking in the aqueous solution containing the compound with sulfonic acid groups for 15 minutes, the remaining carbonized paint film on the metal conductor is hardly visible to the naked eye, and the recovery rate of the recovered metal conductor is greater than 99.5% by weight.

Embodiment 3

[0049] The method for recovering metal conductors from enameled wires in Example 3 is similar to the steps in Example 1, the difference being that the time for pyrolytic carbonization in the heat source environment is 30 minutes. In this embodiment, the immersion time of the heat-treated enameled wire placed in the aqueous solution containing the compound with sulfonic acid groups is 5 minutes, 10 minutes, and 15 minutes in sequence, and the peeling area of ​​the carbonized paint film at each stage 95%, 100%, and 100%, respectively. The pyrolytic carbonized paint film on the surface of the metal conductor becomes less and less, and the surface of the metal conductor becomes cleaner. After soaking in the aqueous solution containing the compound with sulfonic acid group for 10 minutes, the residual carbonized paint film on the metal conductor is almost invisible to the naked eye; after soaking for 15 minutes, the surface of the metal conductor is brighter . The metal conductor...

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Abstract

The invention provides a method for recovering a metal conductor from an enameled wire. The method comprises the steps of: placing an enameled wire in a heat source environment to obtain a heat-treated enameled wire, the enameled wire comprising a metal conductor and a pyrolytically carbonized paint film; and then putting the heat-treated enameled wire into an aqueous solution containing at leastone compound having a sulfonic acid group to separate the pyrolytically carbonized paint film from the metal conductor, wherein the surface of the metal conductor forms a protection film containing acompound with the sulfonic acid group; and finally, taking out the metal conductor from the aqueous solution to complete recovery of the metal conductor.

Description

technical field [0001] The invention relates to the field of electronic coils, in particular to a method for recovering metal conductors from the enameled wires after collecting enameled wires, which are constituent materials of electronic coils. Background technique [0002] Enameled wire is an upstream raw material for electronics and electrical equipment. Its application targets are quite wide, such as: electrical industry, electrical appliance industry, electronic component industry, automotive electronics, automotive electrical equipment industry, power transmission and distribution electrical industry, and electronic product industry. Therefore, although enameled wire is a product of traditional industries, it is an indispensable basic material in the electromagnetic conversion of advanced technologies such as electronics and electrical equipment. [0003] The composition of the enameled wire is to coat a layer of paint film on the surface of a metal conductor with hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B15/00
CPCH01B15/00H01B15/003Y02W30/82
Inventor 王振兴张芳旗张志杰林世伟许志玮吕亭宜
Owner ELECTRIC WIRE & CABLE
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