Method and a device for separating particles of a determined synthetic material from particles of different synthetic materials

Abstract

A method for separating a granular synthetic material from a loose mass of various synthetic materials includes: conveying the granular mass along a trajectory having a rubbing surface subjecting the mass falling from the rubbing surface to an electrical field; and collecting at least one of the masses separated by the electrical field. The mass advances in a single layer on the rubbing surface, while maintaining the single layer contact with the rubbing surface, the rubbing surface being subjected to repeated acceleration in opposite directions in the plane of the rubbing surface, or tangential thereto to move the mass on the surface in order to improve the electrostatic charge. The rubbing surface is made of or clad with a material having intermediate triboelectric properties with respect to those of the granular mass, and is clad with a same material as that which it is intended to separate from the mass.