SU1726028A1 - Raw material mill - Google Patents

Abstract

The invention relates to a grinding technique and can be used in industrial construction materials. The purpose of the invention is to increase the grinding efficiency. The mill contains a rotating drum 1 with grinding bodies and freely disposed disks 2 interconnected by blades 3. 1 Cp. f-ly, 4 ill.

Description

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The invention relates to a grinding technique and can be used in industrial construction materials.

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

Fig, 1 shows a raw mill, a longitudinal section; in fig. 2-4, section A-A in FIG. 1 (various options).

Inside the rotating drum 1 with the grinding bodies there are freely placed disks 2 connected between themselves blades 3 parallel to the axis of the disks 2. The blades 3 can be straight and bent to the axis of the disks 2 or in the opposite direction (shown by dotted lines). The blades 3 can be located relative to the axis of the disks 2 so that the distance to it from the front along the edges of rotation and from the rear are the same (Fig. 2). FIG. Figure 3 shows the case when the distance from the first in the direction of rotation of the blade edge 3 is less than from the second, and FIG. 4 - the opposite.

The diameter of the discs 2 is determined by calculation from the conditions for ensuring a given lift of the grinding bodies and material (the higher the lifting height, the larger the diameter of the discs), and their maximum diameter is determined from the condition of jamming between the disks 2 and the drum 1 of grinding media.

The number of discs 2 depends on the specified material overpressure (the more overhead is required, the more discs 2).

The circumference of the blades 3 is chosen such that the total size of all the blades in one diametrical section is approximately equal to half the circumference of the disks 2 to ensure the alternation of sections with and without blades.

The number of blades 3 in one section is chosen from 2 to 15, depending on the diameter of the disks 2.

If a greater abrasive action is required, then the first in the course of rotation

the edges of the blades 3 are positioned closer to the axis of the disks 2 than the latter, while their curvature is convex to the axis of the disks 2, if more impact is required, then vice versa.

The remaining dimensions are determined constructively and tested for strength and operability.

The mill works as follows.

As the drum 1 rotates, the disks 2 with blades 3 roll over in it. At the same time, the material and the grinding bodies rise along

direction of rotation, and the blades 3 prevent them from slipping. With further rotation, there comes a moment when the grinding bodies and the material either glide along the blade m 3 (Figs. 2 and 3) or are discarded by them (Fig.

4), and partially detach from the first one along the rotation the edges of the blades 3 and fall.

If the blades 3 are made convex to the axis of the discs, then a part of the material and the grinding bodies rise to the upper position and then

with blows, it is discharged onto the drum 1 on the left side of the axis of rotation of the drum 1.

The application of the invention improves the grinding efficiency as the lifting height of the grinding bodies and

material, as well as the path and time of interaction of grinding media with the material.

Claims (2)

1. A syryv mill containing a rotating drum with grinding bodies. and a shaft with disks freely located inside it, characterized in that, in order to increase the grinding efficiency, the disks are interconnected by means of blades parallel to the axis of the disk. 2. The mill according to claim 1, characterized in that the blades are curved. Aa figl Aa