Tribo-aero-electrostatic separator for coarse granular insulating materials

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 su...

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Bibliographic Details
Published in:IEEE transactions on dielectrics and electrical insulation 2013-10, Vol.20 (5), p.1510-1515
Main Authors: Miloudi, Mohamed, Dascalescu, Lucian, Jia Li, El-Mossouess, Sofiane, Medles, Karim
Format: Article
Language:English
Subjects:
Belts
Charge
Classical Physics
Electric fields
Electrodes
electrostatic processes
electrostatic separation
Engineering Sciences
Environmental Sciences
Fluid Dynamics
Fluid mechanics
Granular materials
Granules
High Energy Physics - Experiment
Hip
Insulating materials
Materials
Mechanics
Mechanics of materials
Particle separators
Physics
Polystyrene resins
Separators
Triboelectricity
Vibrations
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Summary: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.
ISSN:1070-9878
1558-4135
DOI:10.1109/TDEI.2013.6633677