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Separation of Fine Granular Mixtures in S-Plate-Type Electrostatic Separators

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5 Author(s)
Das, S. ; Univ. Inst. of Technol., Angouleme ; Medles, K. ; Younes, M. ; Dragan, C.
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Plate-type electrostatic separators are commonly used for the selective sorting of conductive from nonconductive constituents of a granular mixture. This paper addresses the more delicate issue of granular materials that are characterized by finite nonzero resistivities. The study was conducted with three materials having similar granule size range and specific weight but slightly different electrical properties. Two sets of experiments were performed for evaluating the effect of electrode geometry on the behavior of each of the materials. These results were then employed for predicting the outcome of the electrostatic separation of binary mixtures of good and poor conductors. A third set of experiments validated the predictions and pointed out a couple of nonelectric factors that might deteriorate the performance of a plate-type electrostatic separator in an industrial environment.

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Industry Applications, IEEE Transactions on  (Volume:43 ,  Issue: 5 )