METHOD OF MAGNETIC DRESSING IN SIGN-VARIABLE GRADIENT MAGNETIC FIELDS AND DEVICE TO THIS END Russian patent published in 2012 - IPC B03C1/14 

FIELD: process engineering.

SUBSTANCE: invention relates to magnetic dressing of ores. Proposed method comprises extracting magnetic mineral grains from pump, carrying them by rotary nonmagnetic drum relative to permanent magnets arranged inside said drum that have magnetic polarity alternating in direction of rotation. Note here that floccules swing without separation from drum surface for partial separation of nonmagnetic inclusions. Magnetic system ensures periodical separation of magnetic fraction from drum surface in radial direction, hence, intensive destruction of magnetic floccules and efficient cleaning of magnetic concentrate from nonmagnetic impurities.

EFFECT: higher quality of concentrate.

2 cl, 1 dwg