SU880473A1 - Mill for producing mineral suspensions - Google Patents

Description

one

The invention relates to a device for grinding materials and can be applied in the construction, mining and other industries.

The closest to the present invention is a mill for the preparation of mineral suspensions, which contains a horizontal rotor with blades, a shock plate, a hopper and a drain tray P1.

The disadvantage of this mill is that the degree of grinding of a solid material is low, due to the fact that the incoming material is subjected to grinding only in the zone between the impact plate and the peripheral edges of the blades.

The purpose of the invention is to increase the degree of grinding of a solid material due to the high-frequency oscillation of a comminuted product in the grinding zone.

This goal is achieved by the fact that in the mill for the preparation of mineral suspensions, mainly drilling fluids, containing a horizontal rotor with blades, a shock plate, a hopper and a drain tray, on the free end of the blade along its entire length, an elastic plate is mounted on the back side of the blade, forming impact plate surface

10 is a wedge-shaped gap, the acute angle of which is directed towards the rotation of the rotor.

FIG. 1 shows the proposed mill, a longitudinal section; in figure 2

s section A-A in FIG. one.

Claims (2)

The mill consists of a housing 1, a horizontal rotor 2 with radial blades 3 placed in it, a shock plate k, a loading bin 20 and a drain tray 6. The radial blades 3 are equipped with plates 7 made of an elastic material, for example steel, with plates 3 7 placed on the back of the radial blades 3 at their length and with one edge attached to the free part of the radial blades 3 so that with the surface of the impact plate k these plates 7 form a wedge gap, the acute angle of which is opposite to the rotor rotation 2. The surface of the impact plate is made with protrusions 8 and depressions 9 placed along their length along the axis of the rotor 2 to their length. Rotary mill works as follows. The source material, for example, clay, is fed into the feed hopper 5, and water is simultaneously fed here. The solid phase. Falling on the impact plate C, under the influence of the radial blades 3 of the rotating rotor 2, is crushed. Moreover, grinding occurs not only in the volume of movement of the blades 3, but additionally in the zone located between the ends of the blades 3 and the surface of the impact plate, due to high-frequency oscillations of the plates 7 High-frequency oscillations of the plate 7 in the mill are created as follows. With the passage of the plates 7 along the protrusions 8, a hydraulic wedge is formed, as a result of which the plates 7 are deflected towards the center of rotation. As the plates 7 pass along the valleys 9, the hydraulic wedge 3 disappears and under the action of the elastic forces of the plate 7 oscillates, thereby causing additional crushing of the solid phase of the pulp, P and the prepared solution is discharged from the mill housing 1 through the drain tray 6 to the outside. The use of this mill for the preparation of mineral suspensions makes it possible to increase the degree of grinding of the solid material. An invention of a mill for the preparation of mineral suspensions, preferably drilling fluids, comprising a horizontal rotor with blades, a shock plate, a hopper and a drain pan, characterized in that, in order to increase the degree of grinding of the solid material. due to the high-frequency oscillation of the comminuted product in the comminution zone, at the free end of the blade along its entire length, an elastic plate is mounted on the back side, forming a wedge-shaped gap with the surface of the impact plate, the acute angle of which is directed towards the rotation of the rotor. Sources of information taken into account in the examination 1. USSR author's certificate f 333371, cl. On 02 May 19, 1970.