Abstract: A friction electrifying-type electrostatic sorting apparatus having a preliminary friction electrifying unit for preliminarily electrifying a sorted material by providing a friction; a friction electrifying unit for further electrifying the sorted material having been preliminarily electrified by the preliminary friction electrifying unit; a feeding unit for supplying the sorted material having been electrified by the friction electrifying unit; and an electrostatic sorting unit for electrostatically sorting the electrified material supplied from the feeding unit according to the electrified state of the sorted material by providing the sorted material in an electrostatic field.

Abstract: A loop-like material sorting device includes a comb-like member arranged with an inclination in a supply path supplied with materials to be sorted and formed in a row at a pitch corresponding to the shape or size of loop-like materials, and a vibrating device connected to the comb-like member and for applying the mechanical vibration to the comb-like member, wherein the loop-like materials contained in the materials to be sorted are caught by the comb-like member and then guided to the free end by the inclination of the comb-like member and the vibration applied to the comb-like member by the vibrating device to enable the sorting of the loop-like materials.

Abstract: A dry fluidized bed sorting device comprises a sorting deck arranged with an inclination to make a vibrating motion and continuously supplied with a fluidized bed used as media, while being supplied with materials to be sorted, a large number of separation promoting pieces planted on the bottom of the sorting deck and bent to the downstream side, and a separation plate arranged at a boundary portion for separating the materials to be sorted into deposits and flotages and located on the downstream side of the sorting deck.

Abstract: A nonferrous material sorting apparatus comprises a screening device for screening nonferrous materials to be sorted into materials of a plurality of size ranges, a first sorting device for sorting the nonferrous materials of the minimum size range according to the weight ratio by an inclined vibrating air table supplied with air, and a second sorting device for sorting the nonferrous materials of the size range larger than the minimum size range according to the size in specific gravity of the nonferrous materials relative to constituent materials of a fluidized bed.

Abstract: A conductive material sorting device includes a belt conveyer for supplying materials to be sorted, a roller wound with the belt conveyer, a magnet rotor inserted into the roller to be arranged at a portion of the roller wound with the belt conveyer and having a magnet arranged to alternate N and S poles with each other, and a drive device for rotationally driving the magnet rotor in the same direction as the roller and in the revere direction. An alternating magnetic field is generated by the rotation of the magnet rotor making it possible to send away conductive materials contained in the materials to be sorted along the most distant locus due to the repulsive force of a magnetic field caused by the eddy current generated in the conductive materials accompanying the generation of the alternating field.