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Investigation of electrical field effect on the fluidization characteristics in a two-dimensional fluidized bed
Minerals Engineering ( IF 4.8 ) Pub Date : 2021-06-24 , DOI: 10.1016/j.mineng.2021.107035
Xuejie Bai , Jinshan Yang , Yongqiang Xu , Yi Feng , Tian Qiu , Haifeng Wang , Yaqun He

Electrostatic charge accumulation in a gas–solid fluidized bed is considered an adverse effect. However, with the presence of an external electrical field, we can take advantage of electrostatic charging to separate charged particles according to their polarity. In this paper, we proposed a bench-scale two-dimensional fluidized bed with an external electrical field. We then systematically investigated the tribo-charging behavior of anthracite-quartz mixture in the fluidized bed at different conditions and the effect of the external electrical field on their fluidization characteristics. Subsequently, an orthogonal design of experiments analysis was implemented to find the optimized parameters of gas velocity, plate voltage, and initial bed height to separate bituminous coal particles. These findings provide a dry method to separate coal particles from their associated minerals using the proposed two-dimensional fluidized bed with an external electrical field and have general implications for the triboelectric separation of various materials.



中文翻译:

电场对二维流化床流化特性的影响研究

气固流化床中的静电荷积累被认为是一种不利影响。然而,在存在外部电场的情况下,我们可以利用静电充电根据带电粒子的极性来分离它们。在本文中,我们提出了一种具有外部电场的实验室规模二维流化床。然后,我们系统地研究了不同条件下流化床中无烟煤-石英混合物的摩擦带电行为以及外部电场对其流化特性的影响。随后,实施正交设计实验分析,以找到分离烟煤颗粒的气速、板电压和初始床层高度的优化参数。

更新日期:2021-06-25
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