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《Electronic Components and Materials》 2006-01
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Pre-treating Technology for Recycling the Noble Metal from Waste PCBs

WANG Cai-qin,XIA Zhi-dong,REN Yan-bin,SHI Yao-wu(College of Material Science and Engineering,Beijing University of Technology,Beijing 100022,China)  
In view of environmental protection,highly efficiency,and low cost,one method which was used for pre-treating PCB scrap was introduced.Metals were separated from PCBs by the methods of “two-step crush” and “two-step separation”.The distribution of different metals in these waste PCBs was investigated.Comparing the smelting effects of the different smelting methods,the melting range of metal mixture is between 1 100~1 200℃,and adding anti-oxidation coating can improve the non-oxidizability of metals while smelting.Meanwhile,adding some copper into the fine metal particles can improve their smelting ability.After pre-treating,the primary product for hydrometallurgy can be obtained,so that metals,especially precious metals,can be recycled respectively.
【Fund】: 北京市朝阳区科委资助项目;; 北京市教育委员会资助项目(KM200510005005)
【CateGory Index】: TF83
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