SU1214199A1 - Centrifugal mill - Google Patents

Description

This invention relates to the design of mills for the fine grinding of various materials.

The purpose of the invention is to increase the purity of the crushed material and the nosostability of the mill.

FIG. 1 shows a centrifugal mill, a longitudinal section; in fig. The view of A in FIG. 1 (with the removed end portion of the cylindrical body) J in FIG. 3 - the part of the bottom of the glass with air inlets and the spatula.

The mill contains a cylindrical body 1, loading nozzles 2 on the end covers 3 of the body, an unloading nozzle 4. In the body there are two rotors rotating around the horizontal axis, each of which: made in the form of a cylindrical cup 5 with a bottom 6 and a hub 7, on the bottom 6, radially directed accelerating blades 8 are arranged, which are made in such a way that their entrance part is located perpendicular to the plane of the bottom 6, and the exit section, in a section perpendicular to the plane of the bottom 6, has the shape of a parbola. In the bottom 6 there are loading openings 9j located tangentially to the outer circumference of the hub 7. On the side of the loading nozzle, relative to the loading openings 9, a conical distribution shell 10 is installed on the bottom 6, with a large inner diameter corresponding to the sum of the center distance of the loading openings 9 and their two radii as well as air intake vanes 11, which are adjacent to the bottom 6, lie on the penpendicular relative to the circumference of a diameter equal to the inner diameter of the cylindrical part 5 and tilted at an angle of 30-60 ° relative to the plane of the bottom 6 in the direction of rotation of the glass 5. In addition, in the end covers 3 of the housing 1 and in the bottoms 6 of the glasses 5, air intake openings 12 and 13 are located on the periphery / foot of the same radius the first are located under the inclined plane of the air intake vanes 11, touching the adjacent

the edges of these blades to the PLAYBACK E day 6.

The proposed mill works as follows.

The crushed material through the loading nozzles 2 and the loading openings 9 are simultaneously fed to the conical distribution shells 10 of both cups 5. A uniformly distributed material hits the accelerating vanes 8. At the exit from the accelerating blades, the crushed material receives an additional acceleration due to the air velocity , the flow created by the air intake vanes 11 through the air intake holes 12 and 13, after which the material enters the working area, where 5 collides with particles of the opposite flow, and melchaets and is removed through the unloading pipe 4. Milling axes ttsestvl - a cup around the perimeter.

The uniform distribution of material across the blades is achieved by the fact that distribution cone shells are installed on the glasses on the side of the loading nozzles.

Due to the fact that in the end covers of the housing and in the glasses there are air intake openings and on the side of the loading nozzles on the bottoms there are installed air intake logs, which lie adjacent to the bottoms on perpendiculars to the tangent circles with a diameter equal to the inner diameter of the cylindrical part of the cup and inclined at an angle of 30-60 ° relative to the bottoms 6 along the rotation of the rotors, the speed of the crushed material in the axial direction increases by 10-15%. When the angle of inclination of the air intake vanes changes by 10 ° and less than 30 ° or more than 60, the rate of descent of the comminuted material from the rotor decreases by 5-10%,

Due to the fact that the rotors are made in the form of glasses, the possibility of the gathering of the crushed material in the radial direction is excluded.

The proposed centrifugal mill with a sufficiently high performance ensures high purity of the material and its own wear resistance.

Auda

fPus.

(Reg. 2

Sc / g.

Compiled by L. Chubukova

Editor L. Avramenko Tehred T. Dubinchak

- Subscription

Proofreader A.Zimokosov

Order 819/11

VNIIPI USSR State Committee for Inventions and Discoveries

tlU ads / s

113035, Moscow, Zh-35, Raushsk

------------- Uzhgorod, st. Project, 4

Proofreader A.Zimokosov

Claims (2)

1. CENTRIFUGAL MILL, containing a cylindrical body with an unloading nozzle on its cylindrical part, two cylindrical cups installed in the body and rotating around the horizontal axis, on the bottoms of which working elements are made, as well as a loading system made with a nozzle, distribution shell and loading holes in the bottom of one of the glasses, characterized in that, in order to increase the purity of the crushed material and the wear resistance of the mill, it is equipped with an additional loading system for feeding material into another cylindrical cup, the working elements being made in the form of radially directed accelerating blades, the inlet of which is perpendicular to the bottoms of the cups, the outlet in cross section has the form of a parabola, and the bottoms of the cups and the ends of the body are made with the periphery at the same distance from the horizontal axis of rotation of the glasses by air intake holes, while the cylindrical glasses are placed on both sides of the discharge pipe. 2. Mill pop. 1, about l and - ·. characterized in that it is equipped with air intake blades adjacent to the air intake holes in the bottoms of the glasses and made inclined above these holes at an angle of 30-60 in the direction of rotation of the glasses. SU „1214199> 1 12