SLUICE BOX FOR AURIFEROUS GRAVEL Russian patent published in 1995 - IPC

FIELD: minerals beneficiation. SUBSTANCE: sluice box bottom 2 is made of two sides 3 lined with rubber, placed at an angle to each other, and having sloping riffles 6. The riffles have changeable height, decreasing toward the slope of bottom 2, and form an acute angle between longitudinal axis of the sluice box facing bottom 2 slope. Lateral walls made in the form of feed device chute are the extension of sluice box sides. A plate is fixed between chute lateral walls. Adjoining lines of the plate and walls form an acute angle to sluice box axis, that is directed toward the sluice box. Groove 5 is made between sluice box sides on bottom 2. Self cleaning cut plate device, moving of which is restricted with a rest in vertically-longitudinal direction, is installed at the centre of sluice box tail. Pulp is transported through bottom 2 by gravity, with area of high concentration of heavy placer minerals, generated in bottom axial section. The placer minerals are being moved continuously along bottom 2 and are directed concurrently by riffles 6 into groove 5, and then, along this groove, they enter cut plate device, and are directed out of the process. EFFECT: increased extraction of beneficial component and reliable concentrate loading. 5 cl, 3 dwg