SU1057108A1 - Lining of tube ball mill - Google Patents

Abstract

LIGHTING OF THE PIPE BALL MILL, containing annular sections of plates with a conical working surface located along the drum of the mill, directed towards the movement of the material being crushed, characterized in that, in order to increase the efficiency of the longitudinal classification of grinding bodies, it consists of sections composed of a group of circular sections with the same taper of the working surface, the growth from site to site, and the length of the sites is a multiple of the mass of grinding bodies on the site, and their number is the number of species elyug (A boiling bodies of different diameter, constituting the grinding load. In 4 5 N

Description

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The invention relates to equipment for the fine grinding of materials and can be used in the building materials industry, mining, chemical and other fields of technology.

Lining plates of ball mills with a conical working surface are known, on which there are heels in the form of heels

Closest to the invention to the technical essence and the achieved result is the lining of a tube ball mill, containing annular sections of plates along a drum mill with a conical working surface directed against the movement of the material to be ground 2j.

A disadvantage of the known linings is that they do not provide a sufficiently effective classification of grinding bodies according to their sizes and masses along the mill.

The purpose of the invention is to increase the efficiency of the longitudinal classification of grinding media.

The goal is achieved by the fact that the lining of a pipe ball mill, containing annular sections of plates with a conical working surface along the drum's length, directed towards the movement of the material to be crushed, consists of sections made up of a group of ring sections with the same taper of the working surface increasing from site to site, moreover, the length of sections is a multiple of the mass of grinding bodies in the area, and their number is the number of types of small bodies of different diameter constituting the grinding load.

FIG. 1 shows the mill housing with the proposed lining, longitudinal section; in fig. 2 shows section A-A in FIG. one.

The lining of the body of a pipe ball mill consists of sections A, B, and C composed of a group of annular sections 2-4 with the same proportion of working surface 5 in the corresponding section.

The working surface is inclined and directed towards the movement of the crushed material, shown by arrow 01.

The angle of the working surface (v from section B is greater than the angle of inclination

working surface "i | in section A, and the angle ° C in section B, in turn, is greater than the angle (q,

The lengths 1, I, and C of the corresponding, sections Ar B and C are multiples of the mass of grinding bodies on each of these sections, and the number of sections is equal to the number of types of small bodies of different diameter constituting the grinding load. 0 The longitudinal classification of grinding media in a mill is carried out as follows.

Under the action of centrifugal force arising during the rotation of the mill, 5 grinding bodies of 6-8 different sizes and masses rise in circular trajectories m to the separation point T, then in a parabolic trajectory rise to point E and then lower to Q case at point G.

Due to the fact that at the point G the grinding bodies fall on the inclined surfaces of the annular sections, a horizontal component 5 of the centrifugal axis, directed toward the inclination of the surfaces 5, i.e. in the direction opposite to the indicated arrow q.

The angle of inclination оС, Л / 2 and 0.2 of the working surface of the lining of each of sections A, B and C is inversely proportional to the masses t, tl and tl of grinding bodies 6-8 of this area.

With a decrease in the mass (diameters) of Terf mels in the direction of unloading, the angle of inclination of the surfaces increases, that is. oi

In contact with the site, for example. measures B, on which there are bodies of minimum mass m, grinding bodies of maximum mass m., the latter, having a greater value of the component of the horizontal force, in the section G – W, the trajectories of their movement will move to section B, and since their mass is greater and mass t of grinding bodies in section B, then they will move further to section A.

The longitudinal movement of grinding bodies of mass t from section B towards the movement of the material will cease at section A, where the balls of the appropriate size and mass are concentrated.

When using the invention, in areas of the mill 1tsa with balls of smaller diameter there is no more than 0.010.04% of grinding bodies of larger diameter, and in areas where

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larger diameter grinding bodies, a me- dium classification of grinding bodies, thermal bodies of smaller diameter in the practical length of the mill, which increases the effective absence of classification, allows for a continuous lining of the pipe mill and provides selective grinding of the material.

Claims (1)

TUBING A BALL BALL MILL, containing ring sections of plates along the length of the mill drum with a conical working surface directed towards the movement of the crushed material, characterized in that, in order to increase the efficiency of the longitudinal classification of grinding bodies, it consists of sections composed of a group of ring sections with the same taper of the working surface, increasing from plot to plot, and the length of the plots is a multiple of the mass of grinding media on the plot, and their number is the number of types of grinding m l different diameter of the grinding load. Phi. " 1