Electrostatic separation for recycling conductors, semiconductors, and nonconductors from electronic waste.
Electrostatic separation for recycling conductors, semiconductors, and nonconductors from electronic waste.
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DOI：
10.1021/es301830v
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发表时间：
2012-09
影响因子：
11.4
通讯作者：
Mianqiang Xue;Guoqing Yan;Jia Li;Zhenming Xu
中科院分区：
文献类型：
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作者：
Mianqiang Xue;Guoqing Yan;Jia Li;Zhenming Xu
静电分离已被广泛用于分离导体和非导体以回收电子废物。然而，电子垃圾的成分很复杂，根据其导电特性可以分为导体，半导体和非导体。在这项工作中，我们做了一个新的尝试，回收的混合物含有导体（铜），半导体（外硅），和非导体（玻璃纤维增强树脂）的静电分离。二元混合物的分离结果表明，导体与非导体、半导体与非导体的分离需要较高的电压水平，而导体与半导体的分离则需要较高的辊速。此外，半导体分离效率比导体分离效率对高电压电平和辊速度更敏感。提出了一种多组分混合物分离的集成过程。导体和半导体的分离效率可分别达到82.5%和88%。这项研究有助于有效回收电子废物中的宝贵资源。
Electrostatic separation has been widely used to separate conductors and nonconductors for recycling e-waste. However, the components of e-waste are complex, which can be classified as conductors, semiconductors, and nonconductors according to their conducting properties. In this work, we made a novel attempt to recover the mixtures containing conductors (copper), semiconductors (extrinsic silicon), and nonconductors (woven glass reinforced resin) by electrostatic separation. The results of binary mixtures separation show that the separation of conductor and nonconductor, semiconductor and nonconductor need a higher voltage level while the separation of conductor and semiconductor needs a higher roll speed. Furthermore, the semiconductor separation efficiency is more sensitive to the high voltage level and the roll speed than the conductor separation efficiency. An integrated process was proposed for the multiple mixtures separation. The separation efficiency of conductors and semiconductors can reach 82.5% and 88%, respectively. This study contributes to the efficient recycling of valuable resources from e-waste.