ROLLER MILL AND METHOD FOR MILLING BRITTLE MILLING MATERIAL Russian patent published in 2016 - IPC B02C4/28 

FIELD: disintegrators and devices for crushing.

SUBSTANCE: group of inventions intended for crushing brittle material for grinding of different grain sizes. Roller mill has two grinding rollers (1, 2) forming a grinding gap (3) and delivery chute (4) for feeding brittle material (5) to the grinding gap. In the delivery chute at least one distributor device (7) is arranged above middle region (M) of grinding gap (3). Distributor device consists of a plurality of beams or is in the form of a needle pusher and extends above grinding gap (3) transversely to the longitudinal extent (3a) of the grinding gap and covers from 5 to 70 % of the cross-section of the delivery chute. Material for grinding is delivered to the delivery chute. Material is crushed in the grinding gap. Material is redirected into delivery chute (4) by means of distribution device with formation of at least two opposite in direction of longitudinal extent (3a) of grinding gap of deposition cone (9, 10). Coarser material for grinding (5a) slides in a middle region of the grinding gap. Coarser material for grinding accumulates, relative to the longitudinal extent of the grinding gap, in a middle region of the grinding gap than in edge regions (R).

EFFECT: providing higher efficiency of a roll mill.

6 cl, 11 dwg