Different charging characteristics of metal and plastic

četvrtak , 13.10.2016.

1. Metal trap
The crushed waste is conveyed through a pipe, and a metal trap is used to separate metal debris having a diameter of 0.75 to 1.2 mm during the conveyance.
2. Electrostatic separator
The mixture is crushed and put into electrostatic separator, which can separate metals such as copper and aluminum by using the different charging characteristics of metal and plastic.This method is suitable for the treatment of metal filled composite materials, cable materials and metallized plastics.
3. Dissolution separation
The plastic coated metal part was immersed in a suspension containing methylene chloride, a nonionic surfactant, paraffin and water to dissolve and separate the plastic coating.

4. Embrittlement separation
So that the mixed metal and plastic waste polystyrene compactor cooling to the brittle temperature of plastic, and then crushed, and then separated by wind sieve separation of metal and plastic.
5. Stripping of the cable sheath
In addition to the above electrostatic separation method, there are two kinds of dry and warm method can make plastic, rubber (including polyethylene) and synthetic rubber and natural rubber, And copper, aluminum wire effective separation.
(1) dry separation: with a far infrared device to the internal heating cable evenly, and then manually peel the skin.
(2) wet separation: the aluminum wire impregnated in the penetrant (surfactant) styrofoam recycling solution, heated to 70-90 degrees after stripping the skin, and then, and then organic solvent several consecutive cleaning, completely remove the tar can be.