FIELD: process engineering.
SUBSTANCE: proposed device comprises mineral stock crusher to grind material to required particle size, device to feed crushed particles by compressed air to separation unit exploiting different drag in air. For grinding and size grading used are counter-rotation discs with dynamic annular slot. Tube with nozzle to form narrow beam of particles is used to discharge crushed particles in air. To collect different-density particles or groups of particles, close in density, holes located at points of maximum separation of different-density particles.
EFFECT: higher efficiency of concentration.
3 cl, 1 dwg
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