Wu Jiang, Qin Yufei, Zhou Quan, Xu Zhenming
School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China.
J Hazard Mater. 2009 May 30;164(2-3):1352-8. doi: 10.1016/j.jhazmat.2008.09.061. Epub 2008 Sep 26.
The electrostatic separation is an effective and environmentally friendly method for recycling metals and nonmetals from crushed printed circuit board (PCB) wastes. However, it still confronts some problems brought by nonconductive powder (NP). Firstly, the NP is fine and liable to aggregate. This leads to an increase of middling products and loss of metals. Secondly, the stability of separation process is influenced by NP. Finally, some NPs accumulate on the surface of the corona and electrostatic electrodes during the process. These problems lead to an inefficient separation. In the present research, the impacts of NP on electrostatic separation are investigated. The experimental results show that: the separation is notably influenced when the NP content is more than 10%. With the increase of NP content, the middling products sharply increase from 1.4 g to 4.3g (increase 207.1%), while the conductive products decrease from 24.0 g to 19.1g (decrease 20.4%), and the separation process become more instable.
静电分离是一种从粉碎的印刷电路板（PCB）废料中回收金属和非金属的有效且环保的方法。然而，它仍然面临着由非导电粉末（NP）带来的一些问题。首先，NP很细且容易聚集。这导致中间产物增加和金属损失。其次，分离过程的稳定性受到NP的影响。最后，在过程中一些NP会积聚在电晕和静电电极的表面。这些问题导致分离效率低下。在本研究中，研究了NP对静电分离的影响。实验结果表明：当NP含量超过10%时，分离受到显著影响。随着NP含量的增加，中间产物从1.4克急剧增加到4.3克（增加207.1%），而导电产物从24.0克减少到19.1克（减少20.4%），并且分离过程变得更加不稳定。
Zotero 插件