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Triboelectric charging and separation of fine powder mixtures
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2020-03-23 , DOI: 10.1002/ceat.201900558 Leonard Hansen 1 , Annett Wollmann 1 , Martin Weers 1 , Bernd Benker 2 , Alfred P. Weber 1
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2020-03-23 , DOI: 10.1002/ceat.201900558 Leonard Hansen 1 , Annett Wollmann 1 , Martin Weers 1 , Bernd Benker 2 , Alfred P. Weber 1
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For increasingly finer powders, the material‐specific separation at high loadings is a challenging task, for instance in recycling processes. Here, a combination of triboelectric charging and electrostatic separation was investigated for powder mixtures of talcum and calcite. The dependencies of the triboelectric charge on the mass loading, the gas velocity, and the mixture ratio were investigated. While higher charge levels were achieved with increasing gas velocity, the mass loading had an opposite effect on the net charge. Although bipolar charge distributions were observed within pure materials and mixtures, electrical neutralization did not occur in the mixtures. Therefore, already in a non‐optimized setup, a decent degree of material enrichment (of up to 53 %) was found on the separating electrodes.
中文翻译：
细粉混合物的摩擦带电和分离
对于越来越细的粉末，高负载下的材料特定分离是一项具有挑战性的任务，例如在回收过程中。在这里，对滑石和方解石的粉末混合物进行了摩擦带电和静电分离的组合研究。研究了摩擦电荷对质量负载、气体速度和混合比的依赖性。虽然随着气体速度的增加实现了更高的电荷水平，但质量负载对净电荷有相反的影响。尽管在纯材料和混合物中观察到双极电荷分布，但混合物中没有发生电中和。因此，已经在非优化设置中，在分离电极上发现了相当程度的材料富集（高达 53%）。
更新日期：2020-03-23
中文翻译：
细粉混合物的摩擦带电和分离
对于越来越细的粉末，高负载下的材料特定分离是一项具有挑战性的任务，例如在回收过程中。在这里，对滑石和方解石的粉末混合物进行了摩擦带电和静电分离的组合研究。研究了摩擦电荷对质量负载、气体速度和混合比的依赖性。虽然随着气体速度的增加实现了更高的电荷水平，但质量负载对净电荷有相反的影响。尽管在纯材料和混合物中观察到双极电荷分布，但混合物中没有发生电中和。因此，已经在非优化设置中，在分离电极上发现了相当程度的材料富集（高达 53%）。
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