Research on Technological Parameters of Pulverization and Separation of Waste Printed Circuit Board by Private Mechanical Energy Mill
Pulverization and separation of waste printed circuit board (PCB) is a key physical method to recycle the metal and epoxy resin from the waste printed circuit board. The present pulverization process based on rolling and extrusion easily results in encapsulating nonmetal in metal. In this condition, the recycled metal is not with high purity. Sometimes, the precision of present method is not effective enough to separate the metal and nonmetal. Additionally, secondary blowing dust and poisonous and harmful gas can easily been caused by the pulverization with positive pressure and the independent process of pulverization and separation. However, the mechanical energy mill with air classifiers is a way of mechanical pulverization and air classification that the particles are strongly impacted, fricted and sheared among hammers and liner and then qualified production are separated by air classifiers. At this paper, the private mechanical energy mill is used in pulverization and separation of waste printed circuit board. The technique is mainly used to extract metal and epoxy resin from waste printed circuit board. The results show that the private mechanical energy mill can efficiently powder and separate printed circuit board, effectively dissociate the metal and nonmetal. At this process, the secondary environmental pollution is not caused. The biggest extraction efficiency is at the -60 mesh for metal and epoxy resin. The extraction efficiency of metal is 96～99%. The extraction efficiency of nonmetal is above 99%.
Ming-xing ZHANG Hai-yan CHEN Cui-ping YAN Long-yuan LIN Meng-jun CHEN
Key Laboratory of Solid Waste Treatment and Resource recycle, Ministry of Education, at Institute of Environment and Resources,Southwest University of Science and Technology, Mianyang, Sichuan, China, 621010
国际会议
The Fifth International Conference on Waste Management and Technology(第五届固体废物管理与技术国际会议)
北京
英文
299-303
2010-11-01（万方平台首次上网日期，不代表论文的发表时间）