DRUM-TYPE BALL MILL WITH CLASSIFYING UNLOADER Russian patent published in 2013 - IPC B02C17/06 

FIELD: process engineering.

SUBSTANCE: proposed mill has lined body connected and aligned with loading and unloading bottoms. Perforated lined shell ring is arranged inside said body and aligned therewith to make a grinding chamber while classifying unloader is arranged on unloading bottom to confine them thereat. Annular chamber is arranged inside multithread screw conveyor. Classifying unloader consists of circular discs aligned with lined body, aspiration pipe arranged there between and aligned therewith and alternating solid and perforated blades arranged radially with lined body, front and rear chambers composed by annular discs, aspiration pipes and solid and perforated blades. Front chambers communicated via openings in first annular disc with first annular chamber and grinding chamber. Multithread helical blade is arranged at aspiration pipe inner surface and having open screw channels in its every thread. Rear chambers communicate with open screw channels via holes in aspiration pipe.

EFFECT: higher efficiency, electric power savings.

2 cl, 3 dwg