PNEUMATIC VACUUM SEPARATION PLANT FOR BULK MATERIALS

The invention refers to coal, ore mining, construction, chemical, food, agricultural and metallurgic industries and can be used for preliminary and final coal benefication, ferrous, non-ferrous, rare and noble metal ores, metal slag, nonmetallic materials, separation of food products, industrial and domestic wastes etc. The target of the proposed invention is to improve the quality of separated products, to increase the capacity of a single unit, and to increase its service and technological reliability. The pneumatic vacuum separation plant for bulk materials, consisting of loading bin, separating feeder, mesh conveyor, compressed air blowing device for the conveyor mesh, transporting nozzles unified with separation bins and located over the conveyor mesh, discharge nozzles under the conveyor mesh in a single plane with transporting nozzles and simultaneously adjusted for separation of the primary material into products of specific density, aspiration systems (cyclones) as well as devices for generation of ascending sucking air flows in the transporting nozzles and discharge flows in the discharge nozzles, where the separating feeder represents a finned surface with lengthwise slots for removal of the plate-shaped part of the bulk mixture, and ensuring uniform supply of the remaining part to the conveyor belt, which is cleaned by the means of compressed air blowing device, all the transporting nozzles are located at different distance from the conveyor mesh, enabling separation of the remaining part the bulk mixture by the target densities, all the discharge nozzles are located under the transporting nozzles at different distance from the conveyor mesh, transporting and discharge nozzles along the conveyor mesh can be moved vertically, discharge nozzles are connected directly to devices generating the discharge air flow of different velocity and power, aspiration systems (cyclones) connect the transporting nozzles unified with the separating bins to the suction devices, that generate the specific velocity and lifting power of the air flow. 3 dependant claims, 2 illustrations. L'invention concerne des dispositifs destinés à la séparation en fonction de la densité de matières pulvérulentes préalablement triées et peut s'utiliser dans n'importe quelle branche de l'économie nationale. L'installation de séparation pneumatique à vide de matières pulvérulentes comprend une trémie de chargement, un dispositif d'alimentation et de séparation se présentant comme un