CENTRIFUGAL COUNTERFLOW MILL Russian patent published in 2022 - IPC B02C13/14 

FIELD: materials grinding.

SUBSTANCE: invention relates to devices for grinding various materials and can be used in the production of building materials. The mill contains two housings 1 interconnected by a tangential channel 2, the side walls of which 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 made with the possibility of rotation in the direction of the corresponding outlet of the channel. In the tangential channel 2 there is an unloading pipe 4, equidistant from the axis of rotation of the rotors 3. Loading nozzles 5 in each housing 1 for supplying the crushed material are located on the arc of a circle equal to 50…280°, counting from a straight line passing through the centers of rotation of the rotors 3 and with a radius equal to 1/4 ... 3/4 of the radius of the rotor 3 centered on the vertical axis of the latter. At the lower end of each loading pipe 5 there is an inclined cut 6 at an angle of 45° from the side opposite to the rotation of the corresponding rotor 3. Each rotor 3 consists of upper 7 and lower 8 horizontal disks, respectively, of larger and smaller diameters. The accelerating blades 9 of the upper horizontal disk have a cutout corresponding to the profile of the loading pipe 5 with the provision of a technological gap. The upper horizontal disc 7 has an annular perforated recess 11 with a height of (0.1...0.2)D_max, where D_max is the maximum particle size of the starting material, made with the radii of the loading pipe 5 in the plan. To the lower end of each boot nozzle 5, from the side of the inclined cut, plate stops 12 are rigidly attached, located in an annular perforated recess 11 with a technological gap in height and radial size. The holes 13 of the annular perforated recess 11 are made in the form of a truncated cone with a smaller base at the top, the diameter of which is equal to (0.1...0.2)D_max .

EFFECT: mill provides an increase in the efficiency of the grinding process and productivity of the finished product.

1 cl, 4 dwg