SLUICE FOR SAND DRESSING Russian patent published in 2011 - IPC B03B5/70 

FIELD: technological processes.

SUBSTANCE: invention relates to mining industry, to dressing of sands of gravel deposits and may be used to develop gold-containing sands. The sluice for sands dressing consists of an inclined bottom with boards, opened at the side of the lower part, trap elements in the form of solid steps fixed on the bottom, a drive of oscillations and a sprinkler. The bottom with the boards is installed with the possibility to vary the angle of inclination up to the negative value, when its rear part is higher than the front one. Solid steps are only installed in the rear part of the bottom. Other steps are made as interrupted, made of alternating walls and spaces between them, besides, walls of adjacent steps are installed in a staggered order. In front of the lower solid steps there are grooves made with unloading holes, under which at the lower part of the bottom there are cassettes with tubes arranged as capable of longitudinal displacement, inner diameters of which are not less than the diameters of holes, and centre-to-centre distances between tubes are equal to centre-to-centre distances of the holes. On top on the bottom there is a harrow with teeth fixed on rods arranged between steps aside from the grooves. Drive of oscillations is only connected to the harrow.

EFFECT: improved efficiency and quality of dressing, and also reduced power inputs.

2 cl, 6 dwg