1. Mechanical Separation Method. Drum-type Peelers Processing Technique. This method is suitable for handling waste wires and cables with the same diameter. This equipment performs excellent wire and cable stripping.
2. Low Temperature Freezing Method. The low temperature freezing method is suitable for processing various specifications of wires and cables. Waste wires and cables are first frozen to make the insulation brittle, followed by vibration crushing to separate the insulation from the copper wires.
3. Chemical Stripping Method. This technique uses an organic solvent to dissolve the insulation of waste wires, achieving the separation of copper wire from insulation. The advantage of this method is the recovery of copper wire, but the drawback is the difficulty in treating the solution, and the high cost of the solvent. The development direction of this technology is to research a cost-effective and practical solvent.
4. Pyrolysis Method: Waste cables are first sheared, then fed into the pyrolysis chamber by a conveying feeder. The copper wire produced after pyrolysis is transported to the discharge water seal pool by a grate conveyor and then transferred to a product collector. The copper wire can be used as raw material for producing refined copper. The gases produced from pyrolysis are burned in a supplementary combustion chamber to eliminate combustible substances, then sent to the reactor where CaO absorbs Cl₂ before being discharged. The calcium chloride produced can be used as a construction material.
