SU1389842A1 - Dismembrator - Google Patents

Abstract

The invention relates to a device for grinding materials. The purpose of the invention is to improve the quality of grinding. The dismembrator comprises a housing 1 in which the plates 8 are fixedly mounted, inclined at an angle of 140-160 ° to the direction of the vector of the peripheral speed of the rotor 6 with the grinding elements in the form of fingers. The casing 9 encircles the peripheral row of plates 8 by 5/6 circumference. The peripheral branches of the plates required by the casing are made vertical and have an angle of 120-140 ° C inclined to them. slats 10. Above the slats on the side surfaces of the housing 1 are mounted fender elements 11 of a concave shape. Above the fastening of the strips 10 in vertical branches, windows 12 are made for the withdrawal of a large fraction. 2 Il.

Description

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The invention relates to the field of grinding bulk materials, can be used in the construction, chemical and other sectors of the industry and is an improvement to the dismembrator according to the author. St. No. 1174082.

The purpose of the invention is to improve the quality of grinding.

FIG. 1 shows a dismembrator, a general view; in fig. .2 - section A-A in FIG. one.

The dismembrator includes a housing 1, a stator 2 with an inlet chute 3 of the material being ground, a discharge pipe 4 of the ground material, a drive 5, a rotor 6 with concentrically mounted rows of fingers 7, a row of plates 8 of the stator 2 mounted at an angle of 140-160 ° the direction of the vector of the peripheral speed of the rotor 6, the casing 9, encircling the peripheral row of plates 8 by 5/6 of the circle.

The peripheral branches of the plates required by the casing are made vertical and have strips 10 inclined to them at an angle of 120-140 °. Above the slats on the side walls of the housing 1 are mounted concavity fender elements 11. Above the fastening of the strips 10 in the vertical branches of the plates 8, windows 12 are made for removal of a large fraction of the material.

The dismembrator works as follows.

The material to be crushed is fed through the chute 3 into the center of the mill, under the action of centrifugal forces, is thrown onto the fingers 7 of the counterclockwise rotor 6 and destroyed by the blows of the fingers 7 and due to the collisions between the plates 8 of the stator 2 and the fingers 7 of the rotor 6. Pass through the channels between the plates 8, the material falls on the second stage. In the second stage, the material is crushed until, under the action of the air flow component, it is led out through the open channels between the plates 8 in the upper left sector of the mill. Large particles of material carried by the air flow in the vertical channels of the discharge pipe, as a result of hitting the bars 10 and the baffle elements 11, lose speed, fall into the pocket 13 between the bars 10 and plates 8 and return to the second stage through the windows 12. Small

particles of material carried away by the same air flow, hitting the strips 10 and the baffle elements 11, but having less inertia, skirting the pocket 13 and the window 12, are carried to the discharge port 4.

Making the peripheral branches of the plates of the sector vertical eliminates the possibility of depositing material on their surface, the overgrowth of the channels between the plates and ensures the return of large

fractions to the grinding zone.

The fastening of the slats on the vertical branches of the sector plates at an angle of 120-140 ° to the flow of dust gas mixture ensures effective beating of large particles of the material and their return to the zone of height. Increasing the angle of inclination of the slats by an angle of more than 140 ° increases the number of large particles being carried away by increasing the living cross section between the slats and sliding the impact of the slat, which does not ensure the return of particles to the grinding zone. A decrease in this angle leads to a decrease in the living cross section between the planks and a sharp increase in the hydraulic resistance, which leads to sticking of the trees and jamming of the mill.

Installing bump stops at the tops of the slats and making windows in the vertical branches of the plates above the base of securing the slats ensures that large particles penetrate between the slats.

The Q cavity of the pockets formed by the vertical branches of the plates and the slats, where the coarse fraction through the windows falls and returns again to the grinding zone.

Regulation of air flow through

5, the mill, within certain limits, allows the product of the desired fraction to be removed from the grinding zone and the coarse material is returned for regrinding.

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Claims (1)

Invention Formula Dismembrator auth. St. No. 1174082, characterized in that, in order to improve the quality of grinding, the peripheral branches of the plates required by the casing are made vertical and have planks inclined to them at an angle of 120-140 °, with windows located above the vertical branches of the plates strips over which concave-shaped baffle elements are mounted.