A Non-Polluting Method for Separating and Recycling Metals from Crushed Electronic Wastes by Vacuum Metallurgy
During the treatment of electronic wastes, crushing process was usually used to strip metals from various base plates. Several methods were applied to separate metals from nonmetals. However, mixed metallic particles obtained from these processes were still a mixture of various metals including some toxic heavy metals such as Pb and Cd. With the most emphasis on recover of copper and other precious metals, there have been no proper methods to recover these toxic metals. Pure metals from mixed metallic particles of crushed waste printed circuit boards were separated and recycled by vacuum metallurgy in this study. The purity of copper in the mixed particles was increased from about 80 % to over 98 % with proper separation procedures. In addition, toxic metals like cadmium were almost recovered completely and other metals with high vapor pressure were also recovered with high efficiency. This method not only improved the purity of copper but also recovered the metals with high pressure, especially toxic metals like lead and cadmium. Thus environmental pollutions caused by the toxic heavy metals during e-waste treatment can be eliminated to a certain extent.
Lu ZHAN Zhen-ming XU
School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dong chuan Road, Shanghai, China
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
261-266
2010-11-01（万方平台首次上网日期，不代表论文的发表时间）