METHOD OF ENRICHING FINE-FRACTION CONCENTRATES Russian patent published in 1999 - IPC

FIELD: mining industry. SUBSTANCE: method, in particular, can be used for enriching fine-fraction rock mass containing chemically unbound minerals or metals directly from mineral deposits and from man-caused rejects and concentration plant tails. Initial rock mass is subjected to calibration, mixing with working liquid, step-by-step size and density sorting in ascending current in vertical stepped column, and sieving concentration of each sorted fraction, after which concentrate is finely adjusted in the form of undersize. Finest fractions are sorted by precipitation in oblique canals of replaceable lamination units. Size and density of sorted fractions are controlled by varying intake and pressure of working liquid and choosing precipitation area, dimensions of canals and angle of inclination of canals in lamination units. EFFECT: increased isolation of minerals, preferably fine-class minerals. 17 cl, 5 dwg, 5 tbl