DEVICE FOR EXTRACTION OF FINELY-DISPERSED MINERAL PARTICLES FROM MASS FLOW Russian patent published in 1999 - IPC

FIELD: mining industry; gravity extraction in sluice boxes of finely-dispersed mineral particles in form of gold and platinoids contained in magnetite-containing placer deposits. SUBSTANCE: device includes inclined chute with bottom and upper sides, magnetic system consisting of several rows of magnetic elements mounted under bottom across chute and unloading mechanism. Magnetic system is provided with two induction lattices and device for orientation of magnetic elements; bottom is provided with lower sides. Unloading mechanism is made for turning upper and lower sections of chutes. Each induction lattice is made in form of parallel ferromagnetic plates mounted above magnetic elements along vertical axis of their poles and interconnected by transversal plates made from nonmagnetic material. Device for orientation of magnetic element of each row is made in form of counter-weight rigidly secured at ends of axle mounted inside tube made from nonmagnetic material together with magnetic elements secured on it. EFFECT: enhanced efficiency of extraction of mineral particles by 20 to 30%. 3 cl, 3 dwg