1. Manual peeling method: This method adopts manual peeling, which has low efficiency and high cost, and the working environment of workers is poor;
2. Incineration method: Incineration method is a traditional method to burn the plastic skin of the waste cable and then recover the copper therein, but the generated smoke is extremely polluted, and at the same time, the surface of the copper wire is seriously oxidized during the incineration process. , reducing the metal recovery rate, the law has been strictly prohibited by governments;
3, mechanical peeling method: the use of cable stripping machine for processing, the method still requires manual operation, is semi-mechanized, labor intensity, low efficiency, and only applies to the processing of large diameter cables;
4. Chemical method: The chemical cable treatment of waste cable technology was put forward in the 1990s. Some countries have conducted research. China has also conducted research during the “Eighth Five-Year Plan†period. One of the biggest shortcomings of this method is that the waste liquid produced cannot be treated and has a great impact on the environment, so it is rarely used;
5. Freezing method: This method was also proposed in the 1990s. It uses liquid nitrogen as a refrigerant to make the waste cable brittle at very low temperature, and then breaks and vibrates to separate the plastic skin from the copper wire segment. China has also initiated research during the "Eighth Five-Year Plan" period, but the shortcoming of this method is that it is costly and difficult to industrialize production.
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