After the basic separation, we respectively get pure metal and plastic tailings, but it is not the end of the chain. Further processing of plastic tailings can make you get greater value in metal scrap recycling. Then how to make it? There are two methods: cryogenic processing and hydrogravimetric processing.
Cryogenic processing is to make use of the diversity of plastics’ reflection at liquid nitrogen temperatures. For example, some cable choppers sell relatively high-purity PVC and PE to companies which can further purify the various plastics to purity levels higher than 99%. The impurity, PVC or PE, in the mixture of metal and plastics, is easily removed in a cryogenic process. At liquid nitrogen temperature, PVC shatters into small particles when it is impacted, while polyethylene and other plastics do not. After the process, the relatively large foreign substances can be removed, thus getting purer PVC. Typically, the resulting different plastics are then compounded with virgin PVC and used as a sound-barrier material in automobiles or in other high-value applications.
Hydrogravimetric processing, also named sink and float processing, is to use a sink/float tank with water to isolate a clean polyethylene (specific gravity less than 1.0) that floats and PVC fraction (specific gravity greater than 1.0) that sinks. The material that floats can be used for the injection moulding of such products as flowers pots, while the “sinks” are used for injection moulded floor mats, etc. If you have such equipment, you will have extra profit, that is to say, selling the “floats” and “sinks” to others who carry out the moulding and market the moulded products. This way has been underway in many countries and regions such as Japan, Europe and America. A lot of products are made from such material such as traffic sign bases, speed bumps and parking bumps.
No matter which way we adopts to further process, we need a good copper cable granulator and wire stripping machine to complete the basic separation. Whirlston devotes itself whole-heartedly to manufacture the top copper granulator and wire stripping machine. You can trust Whirston!