SLUICE BOX FOR CONCENTRATION OF METAL-BEARING SANDS Russian patent published in 2003 - IPC

FIELD: mining industry, particularly, concentration of placer deposit sands, and tailings of concentrating plants and mills. SUBSTANCE: sluice box includes body in form of trough and permanent magnets laid on trough bottom with like poles directed outwards. Installed behind magnets across bottom entire width is unloading unit above which additional magnetic system is installed with its like poles arranged against magnets on bottom. EFFECT: reduced idle-time of concentrating plant and higher efficiency of placer gold concentration. 7 cl, 3 dwg