METHOD OF PARTICLES DENSITY SEPARATION Russian patent published in 2013 - IPC B03C1/32 B03B5/30 

FIELD: process engineering.

SUBSTANCE: invention relates to separation of solid particles by density and may be used in mining, concentration, chemical industry, etc, for separation of gob, valuable minerals and metals from crude mineral ore. Proposed method comprises feeding different-density particles into separation medium, lamination of particles over medium bed depth and discharge of them therefrom, preliminary coating of separation fluid free surface, and grinding the particles before separation. Separation fluid represents ferromagnetic colloid quasi-weighted by magnetic field and coated by layer of nonmagnetic fluid, e.g. water, dissolving ferromagnetic colloid but weakly. Note here that process is realised in ferromagnetic colloid with physical density of 0.96 g/cm² and saturation magnetisation of 18 kA/m and current in coils of 3.5-8.5 A.

EFFECT: higher efficiency of separation, better ecological performances.

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