Vibratory separation of powder mixtures using electrification characteristics

产生大量塑胶废物，导致缺乏合适的堆填区。考虑到环境问题，提高塑料回收系统的性能以减少废物是可取的。塑料产品通常由有色金属和塑料等不同材料组成。因此，分离是塑料回收系统中最重要的过程之一。有色金属-塑料混合物的分离方法很多，如基于密度的分离和基于电导的分离。虽然许多研究已经证明了分离器的有效性，但这些调查尚未完成。本文对一种新型静电分离器的性能进行了实验和分析研究。该分离器由配备有两个平板电极的振动输送机组成。通过离子轰击(电晕)、感应和摩擦带电等方法对混合物进行充电。分离试验是在含有50%聚氯乙烯(PVC)和50%铜的样品上进行的。本研究旨在了解各种参数对分离效率的影响，以获得最佳的操作条件。

The high quantity of plastic waste produced has resulted in a lack of suitable sites for landfilling. In view of the environmental problems, it is desirable that the performance of plastic recycling systems is improved so as to reduce disposal.Plastic products usually consist of different materials such as nonferrous metal and plastic. Therefore, the separation is one of the most important processes in a plastics recycling system. There are many separation methods of nonferrous metal -plastic mixture such as density based separation and electric conductivity-based separation. Although many studies have demonstrated the effectiveness of the separators, these investigations have not yet been completed. The further development of a novel separation method with high separation efficiency is required.This paper presents the results of experimental and analytical studies of the performance of a novel electrostatic separator. The separator consists of a vibratory conveyor equipped with two plate electrodes. The mixture is charged by following methods : ion bombardment (corona), induction and triboelectric charging. The separation tests were performed on a sample containing 50% polyvinylchloride (PVC) and 50% copper. This study was conducted to understand the effects of the various parameters on the separation efficiency, in order to obtain the optimum operating conditions.