【摘 要】
：
The recycling of waste printed circuit board (WPCBs) is of great significance for saving resources and pro-tecting the environment.In this study,the WPCBs were pyrolyzed by microwave and the contained valu-able metals Cu,Sn and Pb were recovered from the
【机 构】
：
State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100
论文部分内容阅读
The recycling of waste printed circuit board (WPCBs) is of great significance for saving resources and pro-tecting the environment.In this study,the WPCBs were pyrolyzed by microwave and the contained valu-able metals Cu,Sn and Pb were recovered from the pyrolyzed WPCBs.The effect of pyrolysis temperature and time on the recovery efficiency of valuable metals was investigated.Additionally,the characteriza-tion for morphology and surface elemental distribution of pyrolysis residues was carried out to investi-gate the pyrolysis mechanism.The plastic fiber boards turned into black carbides,and they can be easily separated from the metals by manual.The results indicate that 91.2％,96.1％ and 94.4％ of Cu,Sn and Pb can be recovered after microwave pyrolysis at 700 ℃ for 60 minutes.After pyrolysis,about 79.8％ (mass)solid products,11.9％ (mass) oil and 8.3％ (mass) gas were produced.These gas and oil can be used as fuel and raw materials of organic chemicals,respectively.This process provides an efficient and energy-saving technology for recovering valuable metals from WPCBs.
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