SLUICE BOX FOR MINERAL CONCENTRATION Russian patent published in 2000 - IPC

FIELD: concentration of metals and heavy minerals; applicable in concentration of gold-containing placer materials, ledge ores in cycle of grinding and concentration of gold. SUBSTANCE: sluice box includes trough installed for longitudinal vibration and riffles. Trough has variable curvature in cross-section and is provided with flaps rigidly attached to its side members and forming turned-over vessel together with them. EFFECT: higher efficiency of concentration due to recovery of small and fine gold classes irrespective of size of initial material and higher metal concentration. 3 cl, 3 dwg, 1 tbl