Wu Jiang, Li Jia, Xu Zhenming
School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai, People's Republic of China.
J Hazard Mater. 2009 Aug 15;167(1-3):489-93. doi: 10.1016/j.jhazmat.2009.01.005. Epub 2009 Jan 15.
Electrostatic separation presents an effective and environmentally friendly way for recycling metals and nonmetals from ground waste electrical and electronic equipment (WEEE). For this process, the trajectory of conductive particle is significant and some models have been established. However, the results of previous researches are limited by some simplifying assumptions and lead to a notable discrepancy between the model prediction and the experimental results. In the present research, a roll-type corona-electrostatic separator and ground printed circuit board (PCB) wastes were used to investigate the trajectory of the conductive particle. Two factors, the air drag force and the different charging situation, were introduced into the improved model. Their effects were analyzed and an improved model for the theoretical trajectory of conductive particle was established. Compared with the previous one, the improved model shows a good agreement with the experimental results. It provides a positive guidance for designing of separator and makes a progress for recycling the metals and nonmetals from WEEE.
静电分离为从粉碎的废弃电子电气设备（WEEE）中回收金属和非金属提供了一种有效且环保的方法。对于此过程，导电颗粒的轨迹至关重要，并且已经建立了一些模型。然而，先前研究的结果受到一些简化假设的限制，导致模型预测与实验结果之间存在显著差异。在本研究中，使用辊式电晕静电分离器和粉碎的印刷电路板（PCB）废料来研究导电颗粒的轨迹。将空气阻力和不同的充电情况这两个因素引入改进后的模型。分析了它们的影响，并建立了导电颗粒理论轨迹的改进模型。与先前的模型相比，改进后的模型与实验结果显示出良好的一致性。它为分离器的设计提供了积极的指导，并在从WEEE中回收金属和非金属方面取得了进展。
