To improve the recycling technology of waste national standard cable into a cross-type industry of scrap metal recycling and waste plastic recycling, cable and wire can be divided into five categories according to the main use of bare power lines, special cables, electrical equipment weapons and equipment lines, wire and cable and communication cable. They are generally composed of electrical conductors, cable sheaths and protective layers of three parts.

Common electrical conductor raw materials are copper, aluminum, aluminum alloy profiles, alloy copper, wear-resistant steel pipes (such as aluminum Pansteel, copper-clad steel).



The recycling of the cable is to choose a certain way to get rid of the electrical conductor and the skin, and then select the screening technology to separate the electrical conductor and the skin screen, and obtain more pure metal materials and plastics, so as to achieve the goal of resource recycling. Common ways are:

Incineration treatment

Incineration treatment is generally the use of the flammability of plastics in cables and wires, and the selection of incineration treatment to recycle the metal materials in cables and wires. It is a kind of initial scrap metal recycling method, which has been completely banned in our country, and is a kind of eliminated scrap metal recycling method.

Wire stripping

This method is widely used in processing plants for the disassembly of large-diameter cable lines. As shown in the following figure, the right roller servo motor pushes the upper and lower right rollers to move the clamped production and processing line up and down; The indentation machine servo motor drives the upper and lower two indentation machines to the reverse direction of fitness movement, according to the control of the upper and lower indentation machine in the middle of the offset, to complete the role of peeling and cutting line;

The left roller servo motor pushes the upper and lower left rollers to move the clamped production line up and down; Twisted wire wheel servo motor drives the upper and lower left roller to the reverse direction of the front and back left and right fitness movement to complete the twisting line function. In which the twisted wire wheel and the left roller refer to the same roller in physics.

This method has a good practical effect on the disassembly of large diameter national standard cables. However, because of its strong human support, the productivity of small and medium-sized diameter cable is too low, the level of automation technology is poor, and the sorting of the type of cable is poor.

Ultra-low temperature crushing method

Ductile raw materials exhibit a variety of plastic deformation, viscosity and malleability individual behaviors during crushing production and processing. It is generally believed that the key to the pulverization of particulate matter is the harm of the following three factors: temperature, impact rate, particle size distribution, and these three independent variables control the generation and level of pulverization. The basic concept of ultra-low temperature grinding is to use industrial refrigeration to produce modified chemicals and aging materials that are very easy to be crushed.

Ultra-low temperature grinding technology began to complete modernization in 1948, and there are two common cooling methods at this stage: one is refrigerant cooling, and the other is gas inflation cooling. The following picture shows the ultra-low temperature crushing step of Linde company in France. Raw materials are fed from the metering and verification equipment into the spiral cooler according to the feeding wheel, cooled according to liquid nitrogen, and then sent to the rapid impact crusher. The crushed goods are discharged through the porous structure wheel spacer, and the steam discharged from the impact crusher is purified by the filter device.

At this stage, ultra-low temperature crushing technology has been used in the crushing of waste circuit boards and waste cables. Under liquid nitrogen refrigeration, waste circuit boards and waste cables become brittle and very easy to break, but the cost of ultra-low temperature crushing liquid nitrogen refrigeration equipment is high.

Mechanical equipment crushing and screening method

The key of mechanical pulverization method consists of two modules: crushing and screening. The waste cable is converted into a certain limit of particulate matter module through the crushing module, and then the copper and plastic screens are separated by the screening module to obtain pure copper and plastic.

The discarded cable is transmitted to the primary and intermediate mill (triangular blade mill) through the feeding conveyor belt, the primary and intermediate pulverized material is separated by the magnetic separation equipment to the sieve, the separated sieve gives the large particles to the copper rice mill 1, the smaller copper rice mill 2, the crushed raw materials are transmitted to the vibrating dice by spiral, and the bottom of the dice is equipped with a fan.

The raw materials of the national standard cable are separated into four components after wind speed vibration: copper rice and plastic are collected respectively, and insufficient crushed particles and copper rice plastic compounds are returned to the corresponding stage to carry out the circulation system to be crushed and separated. In this whole process, in order to optimize the selection of the natural environment for work, the ash removal of cloth bags is carried out in the stage that causes more soot

Qingdao Tianxing Cable Co., Ltd. focuses on the production of customized wire and cable manufacturers, main: fire wire and cable, power cable, control cable and other products, exported to more than 40 countries and regions around the world, the annual production capacity of 1 billion yuan. 6000 square meters of storage, standing hundreds of millions of inventory, order demand for rapid distribution and delivery, large prices more favorable. Hotline: 16678668098