CENTRIFUGAL MILL Russian patent published in 2018 - IPC B02C13/22 

FIELD: disintegrators and crushing devices.

SUBSTANCE: invention relates to the various materials crushing devices and may be used in production of construction materials and other industries. Centrifugal mill comprises two bodies 1 arranged in one plane and connected by tangential channel 2, whose side walls converge in the plane of symmetry of the centrifugal mill at an angle of 120–150°. In each housing 1, there is a rotor 3, which is rotatable in the direction of the corresponding outlet of the channel, on which rectilinear accelerating blades 4 are fixed. In tangential channel 2 there is discharge branch pipe 5 equidistant from the axis of rotation of rotors 3. Feed nozzles 6 in each housing 1 for supplying the material to be ground are arranged on an arc of a circle of 50…280°, counting from the straight line passing through the centers of rotation of rotors 3 and a radius equal to 1/4…3/4 of the radius of rotor 3 with the center on the vertical axis of the latter. At the lower end of each feed nozzle 6 there is inclined cutoff 7 at angle of 45°. Each rectilinear accelerating blade 4 has a notch corresponding to the profile of feed nozzle 6, providing a process gap. Each feed nozzle 6 at the bottom includes inclined 8 and horizontal 9 portions, the lower point of the outlet opening of which is at the level of the upper plane of each rotor 3. Each rotor 3 has annular groove 10 with a width corresponding to the width of horizontal 9 and inclined 8 portions of feed nozzle 6 with a provision for a technological gap. Before each rectilinear accelerating blade 4 in rotational direction of rotor 3, flat angular sector 11 is rigidly fixed, forming rectilinear radial shoulder 12 from annular groove 10 to output end of rotor 3. Length of rectilinear accelerating blade 4 is greater than the length of rectilinear radial shoulder 12 1.2…1.5 times, and its height – 2…10 times.

EFFECT: efficiency of the grinding process in the mill is increased.

1 cl, 3 dwg