In daily life, there are more and more discarded wires and cables. Many people do not know how to deal with discarded cables. There are several specific treatment methods for recycling waste cables:
1. Manual peeling method: peeling using pliers or utility knives, low efficiency, high labor cost, and poor operating environment.
2. Incineration method: The incineration method burns the plastic sheath of the waste cable and recovers the copper in it. The black smoke produced by this method can cause serious air pollution, and direct inhalation is also harmful to the body. At the same time, the surface of the copper wire is severely oxidized during the incineration process, which reduces the metal recovery rate. This law has been strictly banned by governments of various countries.
3. Mechanical peeling method: The cable stripping machine is used to process the waste wire and cable, but the machine needs a manual operation. This method is a semi-mechanized operation, and the efficiency is relatively low. It is only suitable for processing cables with relatively thick wire diameters.
4. Chemical method: The chemical method of processing waste cable technology was proposed in the 1990s. The biggest disadvantage of this method is that the waste liquid produced cannot be processed and easily pollutes the environment, so it is rarely used.
5. Freezing method: Liquid nitrogen is mainly used as a refrigerant to make the waste cable brittle at a very low temperature, and then undergo vibration and fragmentation to separate the plastic skin from the copper wire. However, the disadvantage of this method is the high cost and high difficulty in industrialized production.
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