Magnetic pulley for removal of non-magnetic pieces from waste material

摘要

A technique of removing electrically conductive nonmagnetic particles from a stream of material by a cylindrical magnet driven by a conveyor belt carrying the stream of material wherein attractor windings are provided in conjunction with excitation windings for forming zones of attraction of electrically conductive non-magnetic particles to the magnet. Electrically non-conductive and non-magnetic particles are thus not attracted to the magnet and are free to follow a different path than are the electrically conductive non-magnetic particles. Separation is thus achieved between them.