Recycling and processing waste wires and cables, we mainly get the non-ferrous metal copper in them, so how to deal with the waste wires and cables, no matter which method, the ultimate purpose is to separate the copper and the wire sheath. Therefore, we have the waste wire and cable disposal methods of burning, peeling, crushing, freezing, etc.
1. Manual peeling method: This method uses manual method to peel off the skin of wires and cables, which has high efficiency and low cost. It is better to handle some cables and square wires. Unwinding and other filaments, the effect is poor. With the current economic development, labor costs are getting higher and higher, and fewer and fewer waste wires and cables are treated in this way.
2. Incineration method: This method is a relatively traditional method, which uses the combustible nature of the wire sheath to directly burn the waste wire and cable, and then recover the copper inside. Fire is used to get copper. During the process of incineration of wires, copper wires show serious oxidation, which reduces the recovery rate of non-ferrous metals. However, the burning wire skin is more polluting to the environment. Today, when the country is focusing on environmental protection, it is explicitly prohibited.
3. Mechanical peeling method: This method uses wire stripping machine equipment, which is a semi-mechanized operation, requires one labor, and is labor-intensive. What's more, this method is only suitable for some single-strand square wires and cable wires. If we recycle raw materials such as automobile wires, home wires, network wires, electronic wires, etc., it is not suitable to use wire stripping machine equipment.
4. Mechanical crushing method: This method adopts the method of crushing and sorting. The waste wires and cables are peeled by crushing, and then the copper and plastic are separated by water washing or airflow differentiation and electrostatic separation. It can process not only thick square wire and cable wire, but also raw materials such as automobile wire, motorcycle wire, electric vehicle wire, network wire, communication wire, household appliance dismantling wire, electronic wire, etc. The output is higher and the manual work intensity is greatly reduced. In addition, this method is divided into dry type and wet type according to the difference between water separation and water use. Among them, the dry type copper rice machine equipment has the characteristics of not washing with water. Today, when environmental protection is strictly investigated, its market demand is relatively large. .
5. Chemical method: When we mention the word "chemical", the most important thing that comes to our mind is environmental protection. Indeed, this method uses a chemical potion, and the wire skin and copper are separated through the soaking treatment of the potion. The problem is that the potion produced by it is not easy to handle and will cause greater environmental pollution, so this method is only in the experimental stage and has not been put into civilian use.
6. Freezing method: It is relatively taller and more advanced. This method was also proposed in the 1990s. It uses liquid nitrogen as a refrigerant, so that waste wires and cables are frozen at ultra-low temperature and become brittle, and then After crushing and shaking, the plastic and copper are separated. This method has high cost, is difficult to operate on a large scale, and has not been put into actual production.
Suny Group : http://www.sunyrecycle.com/，All rights reserved。
