DEVICE FOR PNEUMATIC RAW MATERIAL ENRICHMENT AND METHOD OF ITS APPLICATION Russian patent published in 2025 - IPC B07B7/86 B01D45/16 

FIELD: separation.

SUBSTANCE: proposed group of inventions relates to separation equipment, namely to devices for gravitational separation of solid materials by density, intended for preliminary or finishing concentration of ores, metallurgical products, coal, non-metallic minerals, food products, etc. Raw materials pneumatic enrichment device includes an air-permeable conveyor, an inlet branch pipe, a nozzle located above the conveyor belt and connected to the inlet branch pipe, settling vortex chamber, purified flow discharge branch pipe and rarefied air creation device. Inlet pipe swirls the flow and is tangentially connected to the settling vortex chamber for secondary flow swirling. Cleaned flow discharge branch pipe swirls the flow in opposite direction relative to secondary swirling and is communicated with rarefied air generator. Cleaned flow discharge branch pipe consists of cylindrical element arranged vertically at settling chamber centre and submerged to certain depth and provided with blank top wall, and discharge branch pipe extending tangentially from said cylindrical element. Raw materials pneumatic enrichment method includes the rarefied air creation device launching, the enriched raw materials placement on the conveyor belt, the enriched raw materials movement under the nozzle for the pseudo-boiling bed formation of the given density raw material particles, through which lower density particles pass unhindered, flow swirling with particles by means of inlet pipe, direction of the swirled flow with particles into the settling vortex chamber through the tangentially located inlet branch pipe, which additionally swirls the flow inside the settling chamber, deposition of particles due to interactions of vortex flows inside settling chamber, cleaned flow is discharged from settling vortex chamber via cleaned flow discharge pipe to swirl cleaned flow in opposite direction relative to inlet pipe.

EFFECT: increasing the efficiency of separation inside the settling vortex chamber.

13 cl, 9 dwg