CENTRIFUGAL MILL Russian patent published in 2019 - IPC B02C13/22 

FIELD: disintegrators and crushing devices.

SUBSTANCE: invention relates to devices for grinding abrasive materials and can be used in production of construction materials, as well as in other industries. Centrifugal mill comprises two housings 1 arranged in one plane and interconnected by tangential channel 2 common for both housings 1. In each housing 1 there is rotor 3 made with possibility of rotation in direction of corresponding outlet hole of channel, on which accelerating blades 4 bent towards rotation of rotor 3 are fixed. In tangential channel 2 there is discharge branch pipe 5 equidistant from the axis of rotation of rotors 3. Loading pipes 6 in each housing 1 for supply of ground material are located on circular arc, equal to 50…280°, counting from the straight line passing through centers of rotation of rotors 3, and radius equal to 1/4…3/4 of rotor 3 radius, with center on vertical axis of the latter. Vertical rectilinear ribs 7 are rigidly fixed on upper plane of each rotor 3, height of which is equal to 0.1…0.2d_max. At the lower end of each loading branch pipe 6 there is an inclined cut at angle of 45° on the side opposite to the rotation of corresponding rotor 3. Every acceleration blade 4 and rectilinear rib 7 have cutout corresponding to profile of loading branch pipe 6 with provision of process clearance. Tangential channel 2 lateral walls converge in mill plane of symmetry. Angle between convergent walls makes 120–150°. Height of each accelerating blade 4 is more than 2d_max, where d_max is maximum size of loaded material particle. Each accelerating blade 4 is rectilinear. Length of accelerating blade 4 in (1.05…1.1) times longer than rectilinear rib 7. Profile of cross section of every accelerating blade 4 and rectilinear rib 7 represents rectangle with concave working side surface, radius of curvature of which is equal to 0.5d_max and (0.1…0.2)d_max.

EFFECT: mill provides for increased efficiency of grinding process and increased efficiency of finished product.

1 cl, 5 dwg