METHOD AND DEVICE FOR GRINDING Russian patent published in 2015 - IPC B02C15/00 B02C4/00 B02C17/00 

FIELD: process engineering.

SUBSTANCE: invention relates to fine grinding of various materials. Proposed process consists in material crushing at rotary bearing surface 2 by grinding bodies 1 shaped to solids of revolution. Note here that grinding bodies 1 are arranged in one ply between two bearing surfaces 2 while clearance between grinding bodies 1 and bearing surfaces set smaller than 0.86 of grinding body diameter 1.Bearing surfaces 2 shaped to cylinder 6, 11, cone 5, 10 or circle 7, 12 are set parallel or at angle to each other. Angle is et smaller the that of friction of grinding body and bearing surface material against ground material. Bearing surface are arranged coaxially or off-centred relative to each other and oriented horizontally, vertically or with inclination. Grinder comprises fixed housing 4 with closed shape, grinding bodies 1 in contact with casing 4 and composed of solids of revolutions, and drive of rotation. Casing 4 consists of deadly interconnected conical part 5, cylindrical stepwise part 6 and circular part 7 provided with concentric guide grooves. Casing 4 houses rotor 9. The latter consists of said interconnected conical part 10, cylindrical stepwise part 11 and circular horizontal part 12. Grinding bodies 1 shaped to conical rollers 18, barrel-like rollers 19 or cylindrical rollers 20 or balls with surface notches or without it are fitted in clearance between casing and rotor.

EFFECT: higher efficiency of grinding.

3 cl, 8 dwg