METHOD OF MINERAL CONCENTRATION AND DEVICE FOR ITS EMBODIMENT Russian patent published in 1998 - IPC

FIELD: mining, in particular, mineral concentration; may be used in washing (concentration) of sands in industrial mining of placers for concentration of crushed ores containing heavy minerals and also for washing of exploratory samples. SUBSTANCE: method includes settling of grains of heavy minerals in centrifugal field and fixing them in pores of mineral bed which is subjected to wavy bending and tensioning and compression with frequency exceeding the rotation speed on mineral bed by factor 3 and more to prevent its pressing-in. The device for embodiment of the offered method includes flexible two-layer conical bowl with internal annular riffles and fastened for rotation round vertical axis impeller with vertical blades secured to bowl lower part; and three or more pressing rolls installed at the level of bowl middle from outside and arranged over circumference, and secured for horizontal motion; devices for pulp supply, removal of tailings and unloading of concentrate External layer of flexible bowl is relatively thinner and made of more rigid material. EFFECT: intensified process of mineral concentration. 3 cl, 1 dwg