Abstract

The paper presents an experimental study of the triboelectrostatic separation feasibility of two plastic mixtures, high-impact polystyrene (HIPS)/acrylonitrile butadiene styrene (ABS) and high-impact polystyrene (HIPS)/acrylonitrile butadiene styrene-polycarbonate (ABS-PC). To mirror real-world material recovery situations, the mixtures of 1-2 mm granular samples were sourced from Information Technology (IT) waste. In addition to balanced composition mixtures of 50% component A and 50% component B, heavily unbalanced compositions such as 10% A/90% B and 90% A/10% B were used in this study. The laboratory set-up consists in a free fall electrostatic separator equipped with a fluidized bed tribocharging device, characterized by interchangeable tribocharging chambers. Preliminary tests established the optimal material for the tribocharging chamber and the duration of the charging process. Samples of granular mixture were tribocharged, then introduced into the free-fall electrostatic separator. The analysis of the seven collecting boxes contents shows a recovery rate of approximately 90% and a purity of about 99% for both components. These results demonstrate the feasibility and the high efficiency of the triboelectrostatic separation of balanced and as well as heavily unbalanced composition mixtures of HIPS/ABS and HIPS/ABS-PC, using the fluidized bed for the tribocharging device.

摘要

本文介绍了两种塑料混合物摩擦静电分离可行性的实验研究，即高抗冲聚苯乙烯 (HIPS)/丙烯腈丁二烯苯乙烯 (ABS) 和高抗冲聚苯乙烯 (HIPS)/丙烯腈丁二烯苯乙烯-聚碳酸酯 (ABS-PC)。为了反映现实世界的材料回收情况，1-2 毫米颗粒样品的混合物来自信息技术 (IT) 废物。除了 50% A 组分和 50% B 组分的平衡组合物混合物外，本研究还使用了严重不平衡的组合物，例如 10% A/90% B 和 90% A/10% B。实验室设置包括配备流化床摩擦充电装置的自由落体静电分离器，其特点是可互换的摩擦充电室。初步测试确定了摩擦充电室的最佳材料和充电过程的持续时间。粒状混合物样品经过摩擦充电，然后引入自由落体静电分离器。对七个收集箱内容物的分析表明，两种成分的回收率约为 90%，纯度约为 99%。这些结果证明了使用流化床作为摩擦充电装置对平衡和严重不平衡的 HIPS/ABS 和 HIPS/ABS-PC 组成混合物进行摩擦静电分离的可行性和高效性。对七个收集箱内容物的分析表明，两种成分的回收率约为 90%，纯度约为 99%。这些结果证明了使用流化床作为摩擦充电装置对平衡和严重不平衡的 HIPS/ABS 和 HIPS/ABS-PC 组成混合物进行摩擦静电分离的可行性和高效性。对七个收集箱内容物的分析表明，两种成分的回收率约为 90%，纯度约为 99%。这些结果证明了使用流化床作为摩擦充电装置对平衡和严重不平衡的 HIPS/ABS 和 HIPS/ABS-PC 组成混合物进行摩擦静电分离的可行性和高效性。