CENTRIFUGAL COUNTERFLOW MILL Russian patent published in 2024 - IPC B02C13/28 

FIELD: devices for grinding various materials.

SUBSTANCE: invention relates to devices for grinding various materials and can be used in production of construction materials. Centrifugal counterflow mill comprises two housings 1 interconnected by tangential channel 2, the side walls of which converge in the plane of symmetry of the centrifugal mill at angle of 120…150°. In each housing 1 there is rotor 3 made with possibility of rotation in the direction of the corresponding outlet hole of the channel. In tangential channel 2 there is discharge branch pipe 4 equidistant from rotors 3 rotation axis. Loading branch pipes 5 in each housing 1 for supply of ground material are located on an arc of a circle equal to 50…280°, counting from straight line passing through centres of rotation of rotors 3, and radius equal to 1/4…3/4 of radius of rotor 3 with centre on vertical axis of the latter. At the lower end of each loading branch pipe 5 there is inclined cut 6 at angle of 45° on the side opposite to rotation of corresponding rotor 3. Each rotor 3 consists of horizontal disk 7, on which there are rectilinear accelerating blades 8, which have cutout 9 corresponding to the profile of loading branch pipe 5 with provision of a process gap. Rectangular ledges 10 with width D_max are rigidly attached to the upper surface of each horizontal disc 7, each of which adjoins with a side edge with height of (0.05...0.1)D_max to the working surface of rectilinear accelerating blade 8 in the direction of its rotation, where D_max is the maximum particle size of the initial material. On the periphery of each of horizontal disks 7 along the perimeter vertical collar 11 is rigidly fixed, and also through square holes 12 are made with side equal to (0.05...0.1)D_max, each of which adjoins vertical collar 11 and rectangular ledge 10. To lower surface of horizontal disks 7 under each square hole 12 to its edges 13 is rigidly attached, for example by welding, box-type dust collector 14 with vertical walls with height of 0.1D_max in planes of edges of through square hole 12 and external cut 15 with profile of horizontal disc 7.

EFFECT: increasing the efficiency of the grinding process and productivity of the finished product.

1 cl, 5 dwg