Tribo-aero-electrostatic separator for coarse granular insulating materialsReport as inadecuate

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1 LAII - Laboratoire d-Automatique et d-Informatique Industrielle 2 PPRIME - Institut Pprime 3 CRYPT - Cryptanalyse LIAMA - Laboratoire Franco-Chinois d-Informatique, d-Automatique et de Mathématiques Appliquées, Inria Paris-Rocquencourt 4 Institute for Advanced Study Tsinghua

Abstract : The tribo-aero-electrostatic separator achieves the selective sorting of mixed granular insulating materials in a fluidized bed affected by an electric field orthogonally oriented to the direction of the fluidization air. The aim of the present paper is to optimize the design and the operation of such a separator, i.e. maximize the total mass of the granules collected at the two electrodes that generate the electric field. The experiments were performed for four different electrode configurations. The granular mixtures to be separated were composed of Acrylonitrile Butadiene Styrene ABS and High Impact Polystyrene HIPS originating from the recycling of waste electric and electronic equipment WEEE. The typical granule size was in the range 2 to 4.5 mm. The highest separation efficiency was obtained when the electric field in the active zone was intensified by the use of an additional electrode connected to the ground and when the collecting electrodes were covered by a thin insulating layer, preventing charge leakage from the particles in contact with them.

Keywords : electrostatic separation Index Terms — Triboelectricity electrostatic processes

Author: Mohamed Miloudi - Lucian Dascalescu - Jia Li - Sofiane El-Mossouess - Karim Medles -



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