GRINDER FOR LOOSE MATERIALS Russian patent published in 1994 - IPC

FIELD: fine grinding machines. SUBSTANCE: device has toroidal grinding chamber, separating chamber connected with grinding chamber, working member in form of screw spiral, drive, air feed device and charging and discharging devices. Separating chamber is made in form of hollow rectangular prism with narrowing bases and classifying collector. One of prism bases in connected with charging device. The other base of prism is connected with grinding chamber and has lower flow hole. Classifying collector is made up of angle section members. Angle section members are arranged in staggered order in upper part of separating chamber with angle pointed upwards. Air feed device is made in form of two louvers. Charging device is arranged on outer surface of prism side wall opposite to upper flow hole. EFFECT: enlarged operating capabilities. 2 cl, 3 dwg