SU1729573A1 - Centrifugal mill - Google Patents

Abstract

The invention relates to equipment for the fine grinding of various materials and provides an increase in productivity. The mill includes a housing made with two grinding chambers interconnected by a tangential channel in which the loading and unloading nozzles are located. In the vertical chambers, rotors are arranged in the form of disks with accelerating vanes fixed at an angle of 30-80 ° C. to the plane of the disk on both sides, the blades located on one side of the disk are offset relative to the blades on the other side by an angle equal to half the angle between the blades, and form two additional grinding chambers, which are equipped with additional loading nozzles. 3 il.

Description

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The invention relates to equipment for the fine grinding of various materials.

The purpose of the invention is to increase the productivity of a centrifugal mill;

FIG. 1 schematically shows a centrifugal mill, a longitudinal section; in fig. 2 - the same, cross section; in fig. 3 - blade on the rotor disk.

The mill comprises a housing 1 with four grinding chambers 7 interconnected by a tangential channel 8 located under the chambers. Inside the housing there are two rotors, each of which includes a shaft 4 with a disk 2 fixed on the shaft. On both sides of each disk there are accelerating vanes 3. The disks 2 of the rotors divide the case 1 into four grinding chambers 7. The rotors are designed to counter-rotate. With both

the sides of the body are the loading nozzles 5, and in the tangential channel 8 there is an unloading nozzle 6. The accelerating vanes 3 are fixed at one angle of 30–80 ° to the plane of the disk 2 on both sides of the disks. Blades 3 on one side of the discs 2 are offset relative to the blades on the other side of the discs at an angle equal to half the angle between the blades.

The mill works as follows.

The material to be ground is fed through the loading nozzles 5 at the same time to the accelerating vanes 3 of both rotors on each side. Particles trapped on accelerating blades that are at an angle of 30-80 ° to the disks, due to centrifugal forces and frictional forces, accumulate on them, slide along the blades and are thrown towards each other from both rotors into the tangential XI |

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channel 8. In the tangential channel, the particles of the material are destroyed by high-speed collisions with each other. the other and discharged through the discharge nozzle 6. The displacement of the accelerating blades 3 on one side of the disks 2 of the rotors compared to the blades on the other side of the disks by an angle equal to half the angle between the blades increases 2 times the uniformity of the material in the grinding zone of the tangential channel, because in this case, the frequency of material falling on the blades is doubled, which significantly increases the probability of collision of particles and the efficiency of grinding.

The use of the mill provides an increase in the productivity of the grinding process lines and reduces their specific intensity of metal.

Claims (1)

Claims of the invention: A centrifugal mill comprising a housing with two grinding chambers interconnected by a tangential channel, rotors in the form of disks with accelerating blades placed in the chambers, discharge pipes and a discharge pipe located in the tangential channel characterized by the fact that in order to increase productivity, the grinding chambers are arranged vertically, and the accelerating vanes are fixed at an angle of 30-80 ° to the disk plane on both sides of it with the formation of two additional grinding chambers, orye boot provided with further nozzles, the blades disposed on one side discs are displaced relative to the blades on the other side drives an angle equal to half the angle between the blades.  1LU N N 5 (DU5.2