TUBE MILL Russian patent published in 2001 - IPC

FIELD: solid material grinding equipment. SUBSTANCE: mill has sectioned Z-shaped drum, charging and discharge devices, frame suspended through rubber-cord casings to bed. Side surface of each drum section is defined by equilateral trapezium, two similar nonequilateral trapezium, with lower bases of all trapezium being equal and smaller than upper bases, with upper bases of all four trapezium being also equal, so that squares are formed at section ends. Square of each successive section is turned relative to square of previous section through angle of 180 deg. Each connected section has square lower base sides equal to square upper base sides of previous section. Tube provides for intensified material processing. EFFECT: increased efficiency, simplified construction and improved quality of ground material. 7 dwg