Method for separating metal and non-metal in waste cable

Abstract

The invention discloses a method for stripping metal and nonmetal in a waste cable, belonging to the solid waste treatment and resource recycle field. In the method for stripping metal and nonmetal in the waste cable, sheared cable particles are put in a groove ultrasonic wave device with medium. The temperature range of water medium in the ultrasonic wave device is less than 100 DEG C, the working frequency of the ultrasonic wave is 9-40kHz, the sound energy density is 0.4W / cm<2>-0.8W / cm<2>, and the treatment time of the ultrasonic wave is 10s-10min. the method reduces losses of metal resources and ensures the complete stripping of the metal and the nonmetal in the cable. And the metal products are provided with high quality. Good conditions are provided for the categorized complete separation of various resources. The stripping efficiency of the metal and the nonmetal in the waste cable can be larger than 85 percent.

Description

technical field [0001] The invention discloses a method for stripping metal and nonmetal in waste cables, belonging to the category of solid waste treatment and recycling. Background technique [0002] During my country's "Eleventh Five-Year Plan" period, industries such as electric power, railways, rail transit, energy, construction, communications, ships, and automobiles still maintained relatively large investment scales, and my country's wire and cable industry is in a period of rapid growth. With the rapid development of our country and the world's social economy, the production and consumption of cables has become the second largest industry in my country after the automobile industry. The rapid development of the wire and cable industry will inevitably bring about the elimination of a large number of waste wire and cables. The composition of the cable includes a conductor (valuable metal materials such as copper and aluminum), an insulator, and a protective coating. ...

AI Technical Summary

Problems solved by technology

If the diameter of the metal conductor in the cable is larger than the distance between the cutters, strong grinding will occur between the cutter and the metal conductor, causing damage to the cutter of the crushing equipment;

[0006] 2) Loss of metal resources: When the diameter of the metal conductor in the broken cable is larger than the distance between the moving knife and the fixed knife, more metal powder is likely to be produced when there is strong grinding between the knife and the metal, resulting in this part of the metal powder in the subsequent sorting process It is easy to lose, and there are problems such as deformation, roughness, and bending on the metal surface;

[0007] 3) Low crushing efficiency: When the diameter of the cable is smaller than the distance between the knives, the crushing equipment cannot peel off the metal and the sheath of the cable well, so the metal resources in this type of cable cannot be recycled, so the crushing efficiency for thin wires Low; moreover, there is a sieve in the crushing equipment of this type of copper rice machine, and only when the particle size after crushing is smaller than the sieve hole, it will leave the crushing equipment. Due to the sieving effect of the sieve, it is easy to cause even the materials required by the particle size to be crushed in the equipment. The interior will also be broken repeatedly, doing more useless work;

[0008] 4) Noise pollution: During the crushing process, due to the thick metal conductor, the violent collision between the cable and the crushing equipment will easily generate a large amount of mechanical noise, causing serious noise pollution and deteriorating the working environment;

In addition, the state of cables in traditional crushing equipment is chaotic, and the stripping of metal and non-metal in cables is a random crushing method

Therefore, in theory, this kind of crushing equipment is more difficult to crush, especially when dealing with messy wires (cables with different diameters), and the crushing efficiency is low.