MULTI-STEP CRUSHER Russian patent published in 1997 - IPC

FIELD: fine grinding. SUBSTANCE: multi-step crusher has receiving-distributing chamber with upper and lower support plates having charging and discharging openings, grinding steps subsequently placed on the shaft, each step has booster disc, sliding down plate, baffle deck and cone screen. A step of preliminary grinding made in the form of conical barrel installed in the cylindrical jacket on the same shaft as booster disc installed, is provided on upper support plate. Lines of hinged beaters in the form of two replaceable rectangular plates with adjustable length are installed on outer surface of the barrel. Conical cylinder is installed inside the conical; barrel on common shaft. Shaft bearings are placed in the cylinder. Cylindrical jacket has baffle plates secured to its inner surface. EFFECT: finer grinding. 3 dwg