DREDGE CONVEYING EQUIPMENT Russian patent published in 2003 - IPC

FIELD: mining, particularly, complex devices for mining of placer mineral deposits. SUBSTANCE: device includes driving screw conveyor enclosed in casing having discharge window and discharge chute with conveying spiral: secured to shaft and additional screw conveyor in fixed casing located parallel to driving screw conveyor. Discharge window and discharge chute are made in end part of driving screw conveyor. Fixed casing of additional screw conveyor is made in form of semicircumference embracing only its lower part, and lower part of casing of driving screw conveyor is made in form of bar screen. Casings of driving and additional screw conveyors are interconnected air-tightly with help of plates. EFFECT: reduced maintenance costs due to combination of conveying and classification processes. 2 cl, 3 dwg, 1 tbl, 1 ex