ORE CRUSHING METHOD AND APPARATUS Russian patent published in 2007 - IPC B02C15/00 

FIELD: processing of rocks and ore in mining industry.

SUBSTANCE: apparatus has vertical roll-type mill comprising horizontal milling table rotating around vertical mill shaft, and at least two stationary milling rolls positioned for rotation and adapted for imparting elastic pressure to layer under milling process, said layer being formed from material adapted for milling on milling table and said rolls rotating on said table. In order to produce crushed product free of or containing at least restricted amount of very fine fraction, at least two milling rolls are formed so and are positioned at such a distance from milling table that single point P of intersection is obtained on intersection of continuation of roll shafts, vertical axis of mill and at height Hm of layer under milling process, said layer being set at height Hm ranging between 1 and 150 mm.

EFFECT: improved quality of particles and reduced yield of ultrathin particles.

10 cl, 9 dwg