| Electronic waste does harm to our environment, so it can not be abandoned. At present, the main purpose of the E-waste recycling is to reclaim the high value products--metal and recycled materials (such as glass). The recycling of the multi-component blend polymer material in the E-wastes has formed a technical bottleneck because of its low recovery value, its high difficult processing and recycling, its long recovery process, and its high investment and long investment recovery period. Thus the E-waste piles up around like a mountain hand in E-waste dismantling plant, it has caused white pollution. In order to improve the E-waste treatment process and improve the efficiency of the waste resource comprehensive recovery, we must find a family for the E-waste polymer materials and develop the comprehensive utilization technology, process and equipment for the multi-component blend polymer material in the E-wastes. At last, it will reduce the waste of resources and prevent from the environmental pollution.The author has studied the treatment technology which the multi-component blend polymer wastes in the E-wastes became harmless, resource and has studied the formulations, equipment and product performance which the multi-component blend polymer wastes in the E-wastes were produced to become the modified asphalt (plastic asphalt). Specific contents are as follows:The author has studied the material composition of the different E-wastes and the dismantling processing methods of the different E-wastes. At the same time, the author has found that the domestic and foreign scholars and E-waste acquisition processing department all pay attention to the recycling of high value products (such as metal), easy recycling material (such as glass) in the E-wastes. While the reports of the recycling of the multi-component blend polymer wastes in the E-wastes are few, almost no treatment reports because of its low recycling value and difficult recycling. The polymer materials in the E-wastes account for about40%of the total. If we could not handle them properly, it will be very significant that they do harm to the environment and it is waste for resources.The author has studied the use of the blend polymer material in the different E-waste, including its type, content, and physical and chemical properties, and has analyzed the domestic and international processing technology. The author has studied the common processing method after the six polymeric material abandoned in the E-wastes. That is the physical recycling, incineration and chemical decomposition. A single type of polymer materials may do the Physical recycling. The recycling solution is that after the polymer materials added to the new material through granulation, the plastic products made into lower grades are for sale. They can also make into the wood and other building materials. This kind of products is aging faster. Chemical recycling is that the polymer materials needs to be classified, and then they are decomposed into small molecules. This kind of method has the characteristic of complex process, high investment. Incineration method is too big for the environment pollution again. All these methods are not suitable for processing the multi-component blend polymer materials in the E-wastes.The author has studied the separation, extraction technology of the multi-component blend polymer materials in the E-wastes. The multi-component blend polymer material in the E-wastes is often bonded with the metal together, so they need to be separated. We extracted the polymer materials through dismantling, screening, separation, magnetic separation, electrostatic separation shape, gravity separation and eddy current separation for the E-wastes.The author has studied the auxiliary selection of the polymer blend materials made into asphalt in the E-waste. Different polymer materials are not the same to the auxiliary sensitivity. We selected mainly the plasticizing agent, initiator, dispersing agent and stabilizer in the experiment. We also did the experiment that pentaerythritol, respectively, potassium persulfate, sodium peroxide dibutyl phthalate, polypropylene glycol, tetrahydrofuran, two chlorine ethane, sulphur toluene, acrylic affected on PS, ABS, PP, PU, PC, PF and other materials. At last, we selected with two chlorine ethane, toluene and potassium sulfate.The author has studied the technology formula of the polymer blend materials being produced to the modified asphalt in the E-wastes. Through many experiments, the author put forward the liquefaction technology. The waste plastic (not cleaned, not classification such as PE, PP, PVC, CR, NR and other polymer blend materials) was liquefied at120-160℃, a standard atmosphere pressure, helium environment, and then the waste polymer blend material was mixed with the asphalt according to the radio of10:1-12:1, and was integrated fully with the asphalt and came into phenol. At last we got the high performance polymer blend modified asphalt. The author has studied the main properties of the modified asphalt which is made by multi-component blend polymer materials in the E-wastes. At the same time, the author analyzed the compatibility between them, and calculated the needle penetration (i.e., viscosity), ductility, softening point and stability under the different incorporation ratio.The author has designed the production equipment of waste polymer blend polymer made into modified asphalt. We designed the modified asphalt reactor according to the process of the waste polymer modified asphalt technology. The reactor used the PLC programmable controller, man-machine interface operation, automatic constant pressure, constant temperature, high pressure, low pressure protection, leakage protection, overheat, cold protection, conductance and more control and other automatic processing. |
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