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A rotating inclined disk electrostatic separation device was designed and investigated for the separation of millimeter sized metal and plastic particles. This device comprises a set of three-phase electrodes intricately built on the upper surface of a streamlined PCB (Printed Circuit Board) and powered by three high-voltage amplifiers, delivering a square waveform signal. The separation mechanism is based on the application of an electro-adhesion force to metal particles, complemented by the disk's rotational action, which facilitates the collection of plastic particles as they naturally detach from its surface. The obtained results, according to voltage levels, inclination angles, and voltage frequency settings, have confirmed the device's performance in terms of recovery and purity rates. Note that these values reached 95% for recovery and 100% for purity for determined values of the parameters. [ABSTRACT FROM AUTHOR]

The electrical curtain board (ECB) is constituted of parallel linear electrodes deposited on a dielectric layer plate and supplied by a poly-phase electrical voltage. This paper reports a study of the movement of Polyvinyl Chloride (PVC) µm-size particles on such an ECB. The experimental setup comprised three ECB plates of different inter-electrodes spacing, and a homemade electric supply. Obtained results show that it is possible to move the quasi-totality of the particles on the ECB if adequate values are given to the voltage, the frequency and the inter-electrodes spacing. [ABSTRACT FROM AUTHOR]

Many tribo-electrostatic separation studies of binary mixtures of millimeter-sized plastic particles have been performed. The objective of this work is an experimental investigation for separating a quaternary mixture comprising four different plastic types issued from waste electrical and electronic equipment. The feasibility of the separation of such quaternary mixtures by the sliding mode tribocharging with a metal wall was demonstrated. The separation of a mixture comprising PA, PC, high impact polystyrene, and polyvinyl chloride granules is better in terms of both purity and recovery when charging the particles by sliding contact with the metal wall, then in the case of a fluidized bed device. [ABSTRACT FROM AUTHOR]