Cable recycling method 1. Manual peeling method: this method uses manual peeling, which has low efficiency, high cost and poor operating environment for workers; 2. Incineration: Incineration is a traditional method, which incinerates the plastic sheath of waste cables and then recovers the copper, but the smoke pollution is extremely serious. At the same time, the surface oxidation of copper wire is serious during incineration, which reduces the metal recovery rate. This method has been strictly prohibited by governments all over the world; 3. Mechanical peeling method: the cable peeling machine still needs manual operation, which is semi-mechanized, with high labor intensity and low efficiency, and is only suitable for processing large-diameter cables; 4. Chemical method: The technology of treating waste cables by chemical method was put forward in 1990s, and some countries and China conducted research during the Eighth Five-Year Plan period. One of the biggest disadvantages of this method is that the waste liquid cannot be treated and has a great impact on the environment, so it is rarely used; 5. Freezing method: This method was also put forward in 1990s. It uses liquid nitrogen as refrigerant, which makes the waste cable brittle at extremely low temperature, and then separates the plastic sheath from the copper wire section through crushing and vibration. China also started research during the Eighth Five-Year Plan period, but this method has the disadvantage of high cost and difficult industrial production. Cable recycling classification 1. Common ground electrical accessories for recycling: cable terminal junction box, connecting pipe and terminal, cable intermediate junction box, steel plate junction box, cable bridge, etc. 2. Regenerated cable tray: Generally, power cables and control cables are laid indoors and outdoors in industrial and mining enterprises, and can also be used for indoor and outdoor erection in telecommunications and radio and television departments. 3. It can be divided into bare wires, insulated wires, heat-resistant wires, power cables, control cables, shielded wires, communication cables, radio frequency cables, etc. 4. Restoring cable intermediate joint: connecting cable with cable conductor, insulation shielding layer and protective layer, and connecting cable with grounding device, which is called cable intermediate joint. Understand the classification of cables: cables mainly include bare wires, electromagnetic wires, insulated wires for motors and electrical appliances, power cables, communication cables and optical cables. Wires and cables refer to materials used for power, communication and related transmission. There is no strict boundary between "wire" and "cable". Usually; Products with fewer cores; The product with small diameter and simple structure is called wire; Bare wire without insulation; And cables in other places. A conductor with a large cross-sectional area (greater than 6 square millimeters) is called a large conductor, a conductor with a small cross-sectional area (less than or equal to 6 square millimeters) is called a small conductor, and an insulated wire is also called a distribution wire. Wires and cables mainly include bare wires, electromagnetic wires and insulated wires, power cables, communication cables and optical cables for electrical appliances. Improving the recycling technology of waste wires and cables has become the cross field of copper recycling and plastic recycling. Wires and cables can be divided into five categories according to their uses: bare wires, electromagnetic wires, electrical equipment wires, power cables and communication cables. They are generally composed of conductors, insulating layers and protective layers. Commonly used conductor materials are copper, aluminum, aluminum alloy, copper alloy and bimetal (such as aluminum-clad steel and copper-clad steel). The following Chengdu Hongfu Renewable Resources Recycling Company will explain in detail some recycling technologies of waste wires and cables. The recycling of waste wires and cables is to separate the conductor from the sheath by certain technical means, and then separate the conductor from the sheath by sorting technology to obtain pure metal and plastic, so as to achieve the purpose of resource utilization. The commonly used methods are as follows: 1. Mechanical crushing and sorting method Mechanical crushing method mainly includes two units: crushing and sorting. Waste cables are decomposed into particle units of a certain scale by a crushing unit, and then copper and plastic are separated by a sorting unit to obtain pure copper and plastic. The waste cable is transported to the first-stage crusher (triangle knife crusher) by the feeding conveyor belt, and the products after the first-stage crushing are magnetically separated to the separation screen, and the larger particles are transported to the copper rice crusher 1 through the separation screen, and the smaller particles are transported to the copper rice crusher 2, and the crushed materials are transported to the vibrating screen by the screw, and a fan is arranged at the bottom of the screen. The material is separated into four components by wind vibration: copper rice and plastic are collected separately, and the incompletely crushed particles and copper rice-plastic mixture are returned to the corresponding links for circular crushing and separation. In this process, in order to optimize the working environment, bag dust removal is carried out in the links where more dust is produced. Second, the stripping method is widely used in the removal of large-diameter cables in factories. The working principle of automatic wire stripper is shown in the following figure. The right roller stepper motor drives the upper and lower right rollers to move the clamped wire rod left and right. The cutter stepper motor drives the upper and lower cutters to move towards each other, and the peeling and tangent functions are realized by controlling the displacement between the upper and lower cutters. The left roller stepping motor drives the left upper and lower rollers to move the clamped processed line left and right; The stepping motor of the twisting wheel drives the left upper and lower rollers to reciprocate in the opposite direction to realize the twisting function. Wherein the torsion wheel and the left roller physically refer to the same roller. This method has a good effect on the disassembly of large diameter cables. However, due to its strong manual dependence, the production efficiency of small and medium diameter cables is too low, the degree of automation is poor, and the cable types are poorly sorted. 3. Incineration Incineration generally uses the flammability of plastics in wires and cables to recover metals in wires and cables. This is an early primitive metal recycling method, which has been banned by the state and is an outdated metal recycling method. 4. Tough materials crushed at low temperature will show various plastic, viscous and elastic behaviors during the crushing process. It is generally believed that particle breakage is mainly affected by the following three factors: temperature, impact speed and particle size, which control the occurrence and degree of particle breakage. The basic principle of low-temperature pulverization is to use refrigeration technology to make materials brittle and easy to break. The earliest industrialization of low-temperature crushing technology was in 1948. At present, there are two commonly used refrigeration methods: one is refrigerant refrigeration, and the other is air expansion refrigeration. The material enters the screw cooler from the metering device through the charging wheel, is cooled by liquid nitrogen, and is sent to the high-speed impact crusher. The crushed products are discharged through the perforated wheel diaphragm, and the gas discharged from the impact crusher is purified by the filter. At present, the low-temperature crushing technology has been well applied to the crushing of waste circuit boards and cables. Under liquid nitrogen cooling, waste circuit boards and cables become brittle and easy to be broken, but the cost of breaking liquid nitrogen cooling device at low temperature is high.
Cable recycling, direct trading, to avoid unnecessary economic losses. Welcome long-term cooperation. Sheng Yuan Wire and Cable Recycling Group Recycling Center is a collection of cable recycling, waste cable recycling, wire and cable recycling, production and processing, and external sales. With years of high-quality products, successful market operation and perfect after-sales service, it has won the support and trust of users. In the spirit of honesty, pragmatism and enterprising, based on high-quality products and guided by market competitiveness, the company has continuously explored domestic and foreign markets and established a number of marketing and service networks throughout the country. The products of Sheng Yuan Cable Co., Ltd. have the production license issued by the state!