Electrostatic separation for recovering metals and nonmetals from waste printed circuit board: Problems and improvements
Electrostatic separation for recovering metals and nonmetals from waste printed circuit board: Problems and improvements
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DOI：
10.1021/es800868m
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发表时间：
2008-07-15
影响因子：
11.4
通讯作者：
Xu, Zhenming
中科院分区：
文献类型：
--
作者：
Wu, Jiang;Li, Jia;Xu, Zhenming
静电分离是一种有效且环保的回收废旧印刷电路板的方法。滚筒式电晕静电分离器作为一种经典的分离器，在该领域具有一定的优势。但仍存在一些值得注意的问题，如中间产品及其进一步处理、非导电产品因细颗粒聚集而产生杂质、分离过程的稳定性、生产能力与分离质量之间的平衡等。为了克服这些问题，提出了两步分离的概念，并建立了一种新型的两辊式电晕静电分离器（T-RTS）。与RTS相比，T-RTS处理PCB粉碎废弃物的导电产品增加了8.9%，中间产品减少了45%，生产能力增加了50%。此外，T-RTS中的分离过程更加稳定。因此，T-RTS是一种很有前途的回收粉碎PCB的分离器。
Electrostatic separation is an effective and environmentally friendly method for recycling comminuted waste printed circuit boards (PCB). As a classical separator, the roll-type corona-electrostatic separator (RTS) has some advantages in this field. However, there are still some notable problems, such as the middling products and their further treatment, impurity of nonconductive products because of the aggregation of fine particles, and stability of the separation process and balance between the production capacity and the separation quality. To overcome these problems, a conception of two-step separation is presented, and a new two-roll type corona-electrostatic separator (T-RTS) was built. As compared to RTS, the conductive products increase by 8.9%, the middling products decrease by 45%, and the production capacity increases by 50% in treating comminuted PCB wastes by T-RTS. In addition, the separation process in T-RTS is more stable. Therefore, T-RTS is a promising separator for recycling comminuted PCB.