Analysis of a novel insulating conveyor-belt tribo-electrostatic separator for highly humid granular products

The objective of this work is to describe a new configuration of tribo-electrostatic separator equipped with an insulating rubber belt conveyor, to facilitate the processing particles saturated with moisture. The insulating belt is continually charged by corona discharge produced by a fine-wire elec...

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Bibliographic Details
Published in:Journal of electrostatics 2019-07, Vol.100, p.103357, Article 103357
Main Authors: Benaouda, I., Zelmat, M.E.M., Ouiddir, R., Dascalescu, L., Tilmatine, A.
Format: Article
Language:English
Subjects:
Chemical Sciences
Electrostatic processes
Fluid mechanics
Material chemistry
Mechanics
Physics
Tribo-electrostatic separator
Triboelectricity
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Summary:The objective of this work is to describe a new configuration of tribo-electrostatic separator equipped with an insulating rubber belt conveyor, to facilitate the processing particles saturated with moisture. The insulating belt is continually charged by corona discharge produced by a fine-wire electrode, placed at a distance of 5 mm above it. The experiments were carried out under conditions of high humidity using samples of HDPE and PP particles. Separation experiments have shown that when the belt is charged by corona, more than 50% of the particles were separated with purity higher than 95%. •Novel tribo-electrostatic separator using an insulating belt conveyor electrode.•The insulating belt is electrically charged by corona discharge.•The samples used are humid HDPE and PP mm-size particles.•The electric field is increased due to the charge imparted to the insulating belt.•Corona charging of the belt improves HDPE and PP recovery and purity rates.
ISSN:0304-3886
1873-5738
DOI:10.1016/j.elstat.2019.103357