1. manual peeling method: the method of manual peeling, low efficiency, high cost, and workers operating environment is poor;
2. incineration: incineration is a traditional method, so that the plastic skin of the waste cable combustion, and then recycling of copper, but the smoke generated by the pollution is extremely serious, and at the same time , in the process of incineration of the copper line of the surface of the serious oxidation, reducing the metal Recovery rate, the method has been strictly prohibited by governments;
3. Mechanical stripping method: the use of cable stripping machine for processing, the method still requires manual operation, is a semi-mechanized, labor-intensive, low efficiency, and only applies to deal with coarse diameter cables;
4. Chemical method: chemical treatment of waste cable technology in the last century was proposed in the 90's, a number of countries have been carried out research. China in the "Eighth Five-Year Plan" period has also conducted research. The method has a major drawback is that the waste liquid can not be treated, a greater impact on the environment, it is rarely used;
5. Freezing method: the method was also proposed in the 1990s, the use of liquid nitrogen as a refrigerant, so that the waste cable at extremely low temperatures to become brittle, and then after the crushing and vibration, so that the separation of plastic skins and copper wire segments, our country in the "Eighth Five-Year" period has also set up a project. China in the "8th Five-Year Plan" period has also set up a research project, but the disadvantage of this method is the high cost, difficult to carry out industrialized production.