CENTRIFUGAL COUNTERFLOW MILL Russian patent published in 2024 - IPC B02C13/14 

FIELD: crushing or grinding of 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 the 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 ¼–¾ 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. Curvilinear accelerating blades have cutout corresponding to profile of loading branch pipe with provision of process gap. Each rotor 3 consists of horizontal disk 7, on which curvilinear accelerating blades 8 are rigidly fixed. In the centre of the upper surface of each horizontal disc 7 with a process radial gap to loading branch pipe 5 there is cylindrical protrusion 10, from which on the upper surface of horizontal disc 7 to its periphery there are radial grooves 11 of a semicircular cross section with radius of (0.05–0.1)D_max, where D_max is the maximum size of particles of the initial material, uniformly located along the circumference of each horizontal disc 7 between curvilinear accelerating blades 8.

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

1 cl, 3 dwg