SU1366206A2 - Rotary mill - Google Patents

Abstract

The invention relates to a device for grinding materials and improves the efficiency of grinding materials. The mill contains a multistage case 1 with baffle rings 2 and baffle bars 3, a multi-stage disc rotor with beaters 4. On the shaft 12 of the rotor, an eccentric shank 13 is installed eccentrically with a distribution cone 14 relative to it, which ensures uniform flow and primary grinding of the material. The further grinding of the material is promoted by an annular breaker element 15, adjacent to the inner surface of the housing, and a reflective element located inside the breaker element. The separation chamber 17 is formed by the reflective element 16 and the disk of the penultimate stage of the rotor. The flow of material entering the chamber 17 is thrown to the inner wall of the reflective element 16, and the undersized material enters the previous stage for re-grinding. The crushed material from the final stage of grinding is passed through the discharge pipe. 1 il. (L

Description

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The invention relates to devices for grinding materials, can be applied in the construction mining metallurgical and other sectors of the industry and is additional to the author. No. 1103893.

The purpose of the invention is to increase the grinding efficiency.

The drawing shows a rotary mill, a general view.

The mill contains a multistage case 1 with baffle rings 2 and baffle bars 3, a multistage disc rotor with beaters 4, each subsequent step of which is made of a larger diameter along the flow path.

The rotor contains disks 5, the ends of which are provided with annular protrusions 6 coaxial with them and recesses 7, by means of which in axial grooves 8 of disk 5 are mounted by means of fixing rings 9 bile 4 with grooves 10, in cross section repeating the shape of cross section of protrusions 6 and recesses 7 The inner surface of the baffle rings 2 and the outer side surface of the disks 5 are made conical in shape and are directed toward the loading nozzle 11.

On the shaft 12 of the rotor, an eccentric shank 13 is installed with a distribution cone 14 eccentrically located relative to it. The mill is equipped with an annular breaker element 15 adjacent to the inner surface of the housing 1 and a reflective element 16 located inside it in the form of a hollow truncated cone, the larger base of which is directed to the side loading pipe 11.

The diameter of the disk covered by the reflective element 15, is made smaller than the previous disk. Thus, a separating chamber 17 is formed, which is better placed before the disc of the last stage of the rotor.

The mill works as follows.

The source material enters the loading nozzle 11 and, crushed

Due to centrifugal forces, the material particles are thrown onto the fender conical rings 2 and strips 3, further

encounter a conical surface at an angle of encounter and, after an impact, bounce off it at an angle equal to the angle of encounter, returning upward to the zone of destruction on the rotor bars.

The implementation of the outer side surface of the disk 4 of conical shape, a smaller base directed in the direction of the loading pipe 11,

eliminates slippage of random large particles near the rotor disks due to centrifugal forces generated by the air flow, which increases the stability of the narrow particle size characteristics of the output product and increases the grinding efficiency of the material. The described process extends the residence time of large particles in the grinding chamber and,

consequently, increases the likelihood of their destruction. By varying the angle of inclination of the conical surface, you can adjust the size interval of particle size characteristics.

The principle of operation of the separation chamber 17 is that the material being crushed is picked up by the vortex flows generated by the rotation of the rotor as it enters it. The heterogeneity of local flows in the grinding chamber does not impede the directional movement of the solid gas mixture along the grinding chamber to the discharge port. The solid gas flow, entering the chamber 17, is freed from some part of the pipe-dispersed particles due to the presence of centrifugal forces, which contribute to

substandard particles to the inner wall of the reflective element 16. These particles are returned to the working area of the previous stage of the grinding chamber of the mill.

Fine particles, having a small effective mass, practically do not experience centrifugal forces, and together with the air they enter the subsequent stage.

in the gap between the pipe 11 and the eccentric 55mill of the grinding chamber of the mill, where the taper distribution cone 14, is comminuted and, through the unloading chamber, is evenly loaded into the grinding chamber on the rotor bars 4, where the main grinding takes place. Under the plug pipe comes into the capture system. Continuous air change in the volume of the grinding chamber provides

milling chamber stump of the mill, where they are crushed through the unloading

nozzle enters the capture system. Continuous air change in the volume of the grinding chamber provides

. , 3 13662064

Claims (1)

noCTOHrfcTBO physical constants of power formula. spirit that allows you to maintain the re-rotor mill aut. St. grinding press stable. No. 1103893, characterized with g so that, in order to increase the effective Advantage of the proposed grinding machine, the mill is equipped with the operation of the possibility of varying the inner surface dispersion of the product and the production of the hull ring fender element the mill’s water content by changing the mill rotor speed inside the mill and the 10 element in the form of a hollow bar. You can also get the products of an angled cone, the larger base of the coded dispersion without any additional information is directed to the side of the classifying device branch pipe this is the diameter of the disk outside the workspace of the stranded reflective element, Nits.15 is smaller than previous disk.