SU1694211A1 - Disintegrator - Google Patents

Abstract

The invention relates to a device for grinding materials. The purpose of the invention is to increase the efficiency of the grinding process and the productivity. The disintegrator contains a cylindrical body with a tangential discharge AA fitting, an axial loading nozzle to which the upper disk is rigidly attached. On the top disk are located on the sides of two squares 5 and 6 percussion elements. On the lower disk on the sides of the two squares 10 and 11 are percussion elements. Working chambers of variable cross section are formed between the percussion elements of the upper disk and the percussion elements of the lower disk. The pitch of the percussion elements is increased in the direction of rotation of the corresponding disk, and the pitch between the percussion elements of the first square of the upper disk is larger than in the subsequent squares. The maximum spacing between the impactor elements of the disintegrator may be 0.1–0.5 of the particle diameter of the initial product, and the minimum pitch 1.2–1.3 of the particle diameter of the finished product. 5 il. Yo

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The invention relates to devices for grinding materials and can be used in the chemical and building materials industries.

A centrifugal impact mill is known, comprising a vertical stepped housing, each step in which a larger diameter is made in the course of material movement, a stepped disk rotor with beaters located in the housing, loading and unloading nozzles,

However, this device is characterized by insufficient grinding process efficiency and productivity. A centrifugal mill is also known, comprising a housing in which disks are mounted on coaxial drive shafts with concentric rows of shock elements in the form of blades mounted on them.

The disadvantage of this device is the lack of efficiency of the grinding process and performance.

The closest is a disintegrator containing a cylindrical body with axial loading and tangential discharge pipes, in which the disks with concentric percussion elements, each of which is located between the percussion elements of the opposite disk, are arranged with opposite rotation, and the disks are located horizontally, with the impact elements shifted relative to the centers of the respective disks, with the eccentricity of the upper disk relative to the eccentric trisitetu lower disc is 0.5.

However, the device cannot provide sufficient grinding process efficiency and productivity.

The purpose of the invention is to improve the efficiency of the grinding process and productivity.

In a disintegrator containing a cylindrical body with axial loading and tangential unloading nozzles, in which horizontal discs are placed coaxially with the possibility of rotation, with disks located on them of rows of percussion elements, each of which is located between percussion elements of the opposite disk, the percussion elements are installed on sides of squares that have a common the axis of rotation, the percussion elements are installed with a variable pitch, increasing in the direction of rotation of the corresponding disk, with the pitch between shock elements

the first disk is larger than the next. The maximum spacing between the impact elements is 0.1-0.5 of the particle diameter of the starting product, and the minimum

the pitch between the impact elements is 1.2 - 1.3 particle diameters of the finished product.

Installation of percussion elements on the sides of squares with a common axis of rotation, with variable pitch,

0 increasing in the direction of rotation of the corresponding disk, in this connection with the remaining elements of the disintegrator, exhibits properties such as an increase in the interactions of the particles of material between

5, the occurrence of crushing force and an increase in the effect of destruction of the material from the action of abrasive forces, which leads to an increase in the efficiency of the grinding process and an increase in the productivity of the disintegrator.

1 shows a disintegrator, a longitudinal section; figure 2 is a section a - a - figure 1; Fig. 3 is the same, the position of concentric squares through 90 ° relative to the position shown in Fig. 2; figure 4 is the same, the position of concentric squares through 180 ° relative to figure 2; figure 5 is the same, the position of concentric squares through 270 ° relative to 0 but figure 2.

The disintegrator contains a cylindrical body 1 with a tangential discharge pipe 2, an axial loading pipe 3, which is rigidly attached

5 upper disc 4. Impact elements 7 and 8 are located on the upper disc on the sides of two squares 5 and 6. Impact elements 12 and 13 are located on the sides of the lower disc 9 on the sides of two squares 10 and, 11, respectively. The pitch between the percussion elements of the first upper disk is greater than that between the percussion elements of the subsequent rows, and this pitch depends on the size of the source material, so that the pieces of the original material freely pass between the percussion elements of the first row. Between the percussion elements 7 of the upper disk 4 and the percussion elements 12 of the lower disk 9, a working chamber 14 of alternating

0 section. The same working chambers 15-17 are formed respectively between the percussion elements 12 and 8, 8 and 13, as well as between the percussion elements 13 and the casing 1 of the disintegrator.

5 When changing the mutual arrangement of the disks 4 and 9, the section of the working chambers 14 through 17 varies. The characteristic arrangement of the percussion elements is shown in Figures 2-5. The arrangement of the percussion elements on the sides of the squares with the opposite rotation of the disks allows to obtain working chambers of variable cross section, which significantly changes em character loads on the crushed material.

Disintegrator works as follows.

The material to be ground is fed through the loading nozzle 3 into the central part of the housing 1 of the disintegrator. Upon hitting the lower disk 9, the material is thrown under the action of centrifugal forces to the first row of percussion elements 7 of the upper disk 4, where partial grinding occurs. Having passed the first row of percussion elements, the material falls into the working chamber 14, which has a variable cross section. In this chamber, the material is subjected to intense shock and abrasive loads that are cyclical in nature, after which under the action of centrifugal forces it is found in the working chambers 15 and 16, in which, by installing rows of impact elements 12 and 13, they are subjected to variable cyclical action arising due to a change in the cross section of the chambers (figs 2-5). After the passage of the chamber 17, the material crushed to the required size is removed from the disintegrator through a tangential discharge port 2.

The choice of pitch in the range of 0.1–0.5 of the diameter of the source material is due to the fact that when the pitch is less than 0.1, gaps between the impact elements appear, and the productivity decreases accordingly. Excess pitch more than 0.5 of the particle diameter of the source material is impractical because of the coarsening of the grinding material. The specified limit provides a product of a fraction of 0.025 mm. The choice of the minimum step size of 1.2 - 1.3 diameter

particles of the finished product due to the fact that with such dimensions there is the effect of trapping particles of comminuted material, leading to increased abrasion and crushing forces; selecting a pitch of less than 1.2 leads to a decrease in the living cross section between the impact elements, which reduces the rate of passage of particles. With a pitch size of more than 1.3, the effect of trapping particles decreases, which leads to a decrease in the efficiency of the grinding process.

The use of a disintegrator with percussion elements located on the sides of the square allows to significantly intensify the grinding process and increase productivity.

Claims (2)

1. A disintegrator comprising a cylindrical body with axial loading and tangential discharge pipes, in which horizontal disks with a series of percussion elements, each of which is located between adjacent percussion elements of the opposite disk, are located coaxially with opposite rotation, characterized in that in order to increase the efficiency of the grinding process and the productivity, the impact elements are installed on the sides of the squares with a common center, while the step of the impact elements increases are in a direction corresponding to the disk rotation, and a step between the stressed elements first upper disc square ahead of the next squares. 2. The disintegrator according to claim 1, wherein the maximum spacing between the impact elements is 0.1-0.5. the particle diameter of the original product, and the minimum step -1.2-1.3 of the particle diameter of the finished product (6 9 "About"   ABOUT Figz Aa /five FIG. four /ABOUT # FIG 5 to