TWI453764B - Thermal recovering method for enameled wire - Google Patents

Description

Method for recovering enameled wire by fire method

The present invention relates to a method of recovering an enameled wire by a fire method, and more particularly to a method of recovering an enameled wire by heating a closed space.

The enameled wire is coated with an insulating material on the surface of the conductor by a special treatment to form an outer lacquer layer. Since the lacquer layer has an insulating function, the conductor can be wound to form a coil, so that it can be used for electromagnetic induction. Various applications, such as motors or transformers.

The conventional enamelled wire stripping method can be softened by heating the lacquer layer outside the enamel wire, and then scraping the lacquer layer by a scraping action. However, this heating action will cause the paint layer to produce harmful substances, which may cause harm to the human body and environmental pollution.

In view of the problems of the prior art, in order to be able to solve the problem, the inventors have proposed a method for recovering the enameled wire by fire method based on years of research and development and many practical experiences, as an implementation method and basis for improving the above disadvantages.

In view of the above, it is an object of the present invention to provide a method of recovering an enameled wire by a fire method to solve the conventional problems.

According to the object of the present invention, a method for recovering an enameled wire by a fire method is provided. The enamel wire comprises a copper-containing wire and an outer lacquer layer, comprising the steps of: placing an enameled wire and a source of carbon atoms in a sealed space to heat the sealed space. To a specific temperature, the carbon atom source generates a reducing atmosphere to cause the enameled wire to react with the reducing atmosphere, including carbon monoxide gas, carbon atoms and carbon dioxide gas, to form the outer paint layer into waste, and to separate the waste to recover the copper-containing wire. . Among them, the specific temperature is, for example, between 350 and 1300 degrees Celsius.

In practice, the carbon atom source described above may be coal, coke, bamboo charcoal, fuel oil, organic solvent, hydrocarbon or a combination thereof, so that when the carbon atom source is heated, a reducing atmosphere such as carbon monoxide gas may be generated. Carbon atoms and the carbon dioxide gas. In addition, we have mentioned in particular that the step of separating the waste further comprises excluding one or both of the exhaust gas and the copper slag, and the waste may be a gas and a residual carbon. In other words, when the outer paint layer reacts with the reducing atmosphere to produce waste, the waste may be produced in the form of exhaust gas, and the residual carbon adheres to the surface of the copper-containing wire.

For a better understanding and understanding of the technical features and the efficacies of the present invention, the preferred embodiments and the detailed description are as follows.

S11 to S13‧‧‧ step procedure

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a flow chart showing the steps of a method for recovering an enameled wire by a fire method of the present invention.

Hereinafter, the method of recovering the enameled wire by the fire method according to the embodiment of the present invention will be described with reference to the related drawings. For the sake of understanding, the same components in the following embodiments are denoted by the same reference numerals.

Please refer to FIG. 1 , which is a flow chart of the method for the method for recovering an enameled wire by a fire method according to the present invention. The enamel wire comprises a copper-containing wire and an outer lacquer layer. In the figure, the method for recovering the enameled wire by fire method comprises: step S11: placing at least one source of carbon atoms and an enameled wire in a sealed space: step S12: heating the sealed space to a specific temperature to generate the enameled wire and the source of the carbon atom. The reducing atmosphere acts, for example, including carbon monoxide gas, carbon atoms, and carbon dioxide gas to cause the outer lacquer layer to form a waste with the reducing atmosphere; and step S13: separating the waste to recover the copper-containing wire.

Among them, the carbon monoxide gas, carbon atom and carbon dioxide high temperature gas system decompose and carbonize and reduce the outer paint layer, and prevent the high temperature oxidation of the copper surface, which causes difficulty in recovery. The specific temperature range can be between 350 and 1300 degrees.

Furthermore, the present invention places the enamel wire into a sealed space having at least one source of carbon atoms inside, which is characterized by heating the sealed space to a specific temperature so that the enamel wire and the reducing atmosphere, including carbon monoxide gas, The carbon atom and the carbon dioxide gas act to cause the outer paint layer to form waste, and separate the waste to recover the copper-containing wire. The specific temperature may be between 350 degrees and 1300 degrees, and the paint layer is a single layer and The multi-layer polymer layer, the carbon atom source is one of coal, coke, bamboo charcoal, fuel oil, organic solvent, hydrocarbon and a combination thereof.

In step S13, the outer paint layer is carbonized and decomposed into a gas, or residual carbon is adhered to the surface of the copper material. The former only needs to discharge the exhaust gas, and the temperature may be between 350 degrees and 1200 degrees, and the latter needs to make the temperature higher than copper. Above the melting point of the material, the temperature can be between 1200 and 1350 degrees. The residual carbon is suspended in the liquid surface because the density is much lower than that of the copper liquid. The copper residue is scraped or scraped. Separate and take off to achieve the effect of recycling copper.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

S11 to S13‧‧‧ step procedure

Claims (9)

A method for recovering an enameled wire by a fire method, the enamel wire comprising a copper-containing wire and an outer lacquer layer, comprising: placing at least one source of carbon atoms and the enamel wire in a sealed space; heating the sealed space to a specific temperature The carbon atom source is caused to generate a reducing atmosphere, whereby the outer paint layer and the reducing atmosphere act to form a waste; and the waste is separated to recover the copper-containing wire. The method of claim 1, wherein the specific temperature ranges from 350 to 1300 degrees Celsius. The method for recovering an enameled wire by a fire method according to claim 1, wherein the outer paint layer is a single layer and a plurality of polymer layers. The method of claim 1, wherein the source of carbon atoms is coal, coke, bamboo charcoal, fuel oil, organic solvent, hydrocarbon or a combination thereof. The method of recovering the enameled wire by the fire method of claim 1, wherein the step of separating the waste further comprises excluding one or both of the exhaust gas and the copper slag. The method for recovering an enameled wire by a fire method according to claim 5, wherein in the step of separating the waste, the temperature of the sealed space is between 350 and 1200 degrees Celsius to remove the exhaust gas. The method for recovering an enameled wire by a fire method according to claim 5, wherein in the step of separating the waste, the temperature of the sealed space is between 1200 and 1350 degrees Celsius to remove the copper residue. The method of claim 1, wherein the waste is a gas and residual carbon. A method of recovering an enameled wire by a fire method according to claim 1, wherein the reducing atmosphere comprises carbon monoxide gas, carbon atoms, carbon dioxide gas or a combination thereof.