SUCTION-TUBE DREDGER CLEAN-UP SUCTION DEVICE Russian patent published in 2004 - IPC

FIELD: mining industry. SUBSTANCE: invention relates to hydraulic mechanization facilities and it can be used at mining placers of any density in underwater mines. Proposed clean-up suction device of suction- tube dredger includes suction nose with flat ring screen and vertical bead over periphery, skirt connected by cover plates and bolts with vertical bead and forming vertical slots. Skirt is made of elastic reinforced wear-resistant material. Invention can be used for clean up works on firms having surface irregularities in form of cracks, narrow slit like falls and extraction of mineral components from inter-step and inter-run pillars at primary dredge mining of placer. EFFECT: improved efficiency of extraction of mineral components from placer. 2 dwg