With the rapid development of economy and the acceleration of progress and upgrading, more and more commodities will lose their use value and become waste commodities, and the recycling of waste commodities will enter the stage of recycling waste commodities. Therefore, it is very important to establish a standardized waste recycling market, so that useful resources can be effectively utilized, harmful substances can be properly solved, and the environment can be prevented from being purified. Waste recycling can save energy and protect the environment, and prevent excessive consumption burden on the earth. If there is no waste recycling, we will put more efforts into the production of new products, and the role of material recycling is irreplaceable by any other industry. So each of us has the responsibility to recycle waste products. The pyrolyzed copper wire is sent to the sealed pool at the outlet by the grate conveyor, and then loaded into the product collector. The copper wire can be used as raw material for producing refined copper. What is the reason for cable recycling when the cable is running? When the power cable passes a certain load current, it will. With the increase of load current, the surface temperature of the cable will be higher. If it is not handled in time, the consequences can be imagined. For example, for PVC cables, the upper limit of core temperature is 70 degrees, and the surface temperature will be 5~ 10 degrees lower. So the cable surface temperature is basically below 60 degrees. From the point of power supply, of course, the lower the temperature, the better. The conductor resistance of the cable does not meet the requirements, which leads to the cable heating in operation. Improper cable selection leads to too small conductor section of the cable used, which leads to overload operation. After long-term use, the balance and heat dissipation of the cable are unbalanced, resulting in heat. When installing cables, the arrangement is too dense, the ventilation and heat dissipation effect is not good, or the cables depend on other heat sources. Therefore, the daily maintenance of equipment is essential. In the process of our long-term continuous use of equipment, there have also been some large and small failures in the equipment. . In the partial discharge test system, all coaxial cable lines used for measurement must be properly kept, especially the damage or defect of coaxial plug may cause background noise and test error. All electrode surfaces must be kept clean and free of dust. Operators should clean the key parts of the equipment regularly (usually once a week). Due to long-term load operation, the surface of the voltage regulator will produce carbonaceous substances, which can be wiped with alcohol to keep the surface clean and ensure the reliability of the copper brush. All connections must be available. Grounding must be reliable and good, and shall not be changed at will. When the flat laminated grounding copper tape is found to be partially broken and damaged, it must be replaced in time to avoid the discharge of the grounding wire. Cable termination is extremely important, and PD positioning testers must master the skills of stripping semi-conductive layer and installing oil cup terminal. But it can't be much wrong, just a little, which is usually invisible to the naked eye. Length, it is not mandatory to beat rice, but many manufacturers also beat rice, not necessarily the national standard, but the general national standard generally does not beat rice. We pay attention to every request put forward by customers, fully consider every detail, and actively provide good service ... The classification method of price list of wire and cable recycling application prospect failed to keep up with the revision and modification of design and specification, and the use and promotion of fire-resistant and flame-retardant cables made slow progress due to wire and cable recycling. With the continuous improvement of people's material and cultural life in recent years, we should distinguish between the upper yield point and the lower yield point. For the level of electrical wiring, the occurrence and loss of electrical fires are recovered by wires and cables, and some electrical design regulations have been promulgated in some places. It is clearly stipulated that flame retardants such as fire-resistant cables and wire and cable recycling should be used in some important electrical lines or places. Insulation aging leads to insulation breakdown and reduces construction quality. B, electrical aspects include: the cable head construction technology can not meet the requirements, the cable head is poorly sealed, moisture invades the cable, and the owner who dropped the cable shall bear the accident responsibility. Case replay: 20 13, 15, when Liang was driving a motorcycle through an intersection in Shimen town, Tongxiang, he scraped a telecommunication cable across the road. After the accident, compensate for the loss, but the specific amount cannot be agreed. Liang was mentioned to Tongxiang on February 8, 20 14. During the trial, Liang provided a traffic accident certificate to prove his full responsibility; It is pointed out that hemangioma has nothing to do with traffic accidents and is unwilling to compensate for this part of the cost. It was identified that Liang's participation fee in this traffic accident was 70%. After hearing by Tongxiang court, Liang was compensated for various expenses, lost time and repair costs totaling 23,952.79 yuan. To do a good job of feeder recycling, recycling personnel should first understand all kinds of wires and cables, be familiar with the prices of various models, return categories, clearly mark prices, abide by laws and regulations, and put an end to returns. Recyclers should always know about the feeder recycling market and keep in touch with the market of the day, because they determine the quantity and amount of waste you recycle, thus affecting the price. Now more and more people join the waste recycling industry, and the competition is becoming more and more fierce. When your price is lower or higher than others, you may face the possibility of not making money and losing money. After the pitch is formed, a setting device is added to make the line pair in a perfect spiral shape. The equipment is also equipped with a sensitive tension feedback system. The quality requirement of the wiring system is that when the wiring is untied, the length of the two insulated wires should be equal. 2) In actual production, in order to make full use of the existing equipment and reduce the production cost, the original cable laying equipment was reformed. The main contents of the transformation are as follows: the pay-off frame adopts pay-off; Before the four pairs of wires enter the cable forming machine, the synchronous belt must be pressed up and down to make the four pairs of wires stress evenly; The guide wheels should be as large as possible to keep the spacing of the alignment system and have tension feedback. The cable spacing should be controlled below 180mm, and the cable spacing is small, which is beneficial to the core structure. The quality requirement of finished cable is that the cable core is tight and dense, and the pitch is not easy to loosen, which will affect the impedance unevenness. 3.3 The thickness of the sheath of category 5 cable UTP4 is 0.50m m. These fillers have coarse particles, high free alkali content, many impurities, poor physical and mechanical properties, and poor electrical properties, which easily lead to blackening of copper wires. Other factories use activated superfine calcium carbonate to insulate the physical and mechanical properties of rubber, and most of the activated calcium is treated with stearic acid, which is also the reason for the blackening of copper wires. The use of vulcanizing agent VA-7 can improve the blackening of copper wire, but due to insufficient vulcanization degree, rubber deformation is large and rubber will become sticky. According to the structure of accelerator ZDC, a metal zinc is connected between two connected sulfur in TETD structure, and the structural formula is: ssh5c2 ‖ h5c2 > n-c-s-Zn-s-c-n-c-s-c-n. Wire V is used for internal wiring of instruments and equipment. Guangzhou RVV- copper core PVC insulated sheathed flexible cord, wire and cable recovery allows long-term working temperature105 C, working voltage 500V, wire and cable recovery requires high mechanical protection and often moves and bends. The current market situation, where is the industry going? Yangjiang fire-resistant cable refers to the cable that can keep running for a certain time under the condition of flame combustion. Standard GB 12666.6 (IEC33 1 etc. The fire resistance test is divided into two grades: A and B, and the wire is C, or it is called normalized (normalized), quenched and tempered, solid solution and annealed state according to the category of heat treatment. The fire supply time is 90 minutes. In the steel pipe standard, the flame temperature of Class B is 750 ~ 800℃, and the tensile properties (tensile strength, yield strength or yield point, elongation), hardness and toughness are specified. During the whole test period, the wire min is mainly used as a pipe or structure for conveying fluid. Using waste copper to produce copper and brass products; Tianjin is the main area around the Bohai Sea, and more than 200 enterprises produce wires and cables by using waste copper. The recycled copper market needs to standardize the use of waste copper. The enterprise structure is pyramid-shaped, that is, private enterprises are the main body, large enterprises are the leader, and medium-sized enterprises are the foundation. Small-scale recycled copper plants that use waste copper every year are the mainstream of the recycled copper industry, with about 2,000 enterprises. There are only two enterprises whose utilization rate exceeds 654.38+10,000 tons. In this regard, the copper industry () people said: "The scale of enterprises is small, the process water is low, the waste copper utilization water is not high, the product quality is not good, the environmental protection problem is still serious, the market order of waste copper trade and the business behavior of enterprises are not standardized, and there is still a big gap compared with developed countries." The copper industry suggests strengthening social management, ensuring the quality of copper recycling and cracking down on black copper. We should speed up the transformation of copper recycling enterprises from decentralized to centralized. In the domestic scrap metal distribution center, select appropriate areas and set up scrap copper sorting and collection stations. Editor in charge: