SU977014A1 - Ball mill - Google Patents

Description

The invention relates to devices for fine dry and wet grinding of various materials and can be used in the manufacture of building materials, as well as in the coal, coke, refractory and glass industries.

The ball mill is known, which includes a housing, an accumulator and an unloading device, a horizontal shaft, a mealy body and disks with blades C.

The disadvantage of this mill is that the bodies in them are driven by blades, which wear out relatively quickly, which leads to the exit from the mill as a result of jamming of the blades with melyuishmi bodies and reduce the efficiency of grinding.

Closest to the proposed technical entity is a ball mill, which includes a cylindrical body filled with grinding bodies with loading and unloading nozzles, inside which disks 2 are mounted on a horizontal shaft.

However, the known mill does not provide for satisfactory grinding of the material, both in terms of the grinding technique and in terms of production, due to insufficient interaction of the grinding bodies between themselves and the disks.

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

The goal is achieved by the fact that in a ball mill, including

10 a cylindrical body filled with grinding bodies with loading and unloading nozzles, inside which disks are mounted on a horizontal shaft, the latter mounted at an angle of 3-40 ° to the vertical axis. One half of the discs can be installed with a reverse tilt.

Disks can be made in radially directed edges.

20

The size of small bodies may decrease in the direction of the discharge nozzle.

Figure 1 shows a ball mill, a section; figure 2 - section aa in figure 1.

25

The ball mill consists of a cylindrical housing 1 with a loading 2 and a discharge pipe 3. The discharge pipe 3 is provided with a grid 4 with holes 5. inside the cylindrical

Claims (2)

30 housing 1 on a horizontal shaft 6 installed disks 7 at an angle on the vertical ot 3-40 °, with one half of the disks installed relative to the other half with a backward slope. The disks 7 are made with slit-hole openings 8 and radially directed ribs 9, Case 1 is provided with hatches 10 and 11 serving to load the grinding bodies 12 into the cavity of case 1 and hatch 13 to unload them. The cavity of the housing 1 with disks 7 is not divided into grinding chambers 14-18, which, in the direction of the discharge pipe 3, are filled with grinding bodies of smaller sizes. Ball mill works as follows. Before the ball mill starts operation, the grinding chambers 14-18 are filled with 1/43/4 volumes with grinding media, such as steel balls, and the shaft 6 and the disks 7 are rotated. The material to be crushed is fed through the 2 c grinding pipe. camera 14. When rotating the discs 7, the grinding bodies 12. together with the i5-memorable; the material is caught by the ribs 9 of the disks 7 in the lower part of the molar chamber and thrown into its upper part. As a result, material grinding occurs due to impact and abrasion. The grinding of the material also occurs in the lower part of the grinding chamber due to abrasion or between the disks and grinding bodies. Moving axially under the influence of inclined discs. The ground material to the width: the slit holes 8 of the disk 1 comes through these slots for grinding in the subsequent grinding chamber, etc. The ground material from the last grinding chamber is evacuated through the grate 4 to the unloading bar of the cuttings 3. In this mill, thanks to the inclined disks 4, the grinding bodies additionally perform an oscillatory movement in the axial direction. Consequently, in the proposed ball mill, the process of grinding materials is intensified by the interaction of the grinding bodies and the material to be ground with obliquely set diameters. The installation of disks on a horizontal shaft at an angle of 3 and 40 ° is not advisable, since in the first case a small angle of inclination of the disks does not have a significant effect on the axial; the oscillatory movement of the grinding bodies and the crushed material, and in the second case, the grinding bodies and the grinding material on the disks may hang on the disks, which leads to a decrease in the efficiency of the grinding process. The installation of the radial ribs on the disks provides more intensive movement of the grinding bodies. For the mutual compensation of axial forces acting on the supports of a horizontal shaft with an inclined mounting of disks on it, one half of the disks in the proposed mill are installed. Lena with respect to the other half with the reverse slope. The filling of the cavity of the cylindrical body towards the discharge funnel with smaller grinding media contributes to the intensification of the grinding process, because as the material moves along the length of the mill, its grinding degree increases and for subsequent more effective grinding it requires more collisions with grinding bodies. Claim 1. Ball mill, which includes a cylindrical body filled with grinding bodies with loading and unloading nozzles, inside which there are discs mounted on a horizontal shaft, in order to increase the efficiency of the grinding process, disks are installed at an angle of 3-40 ° to the vertical. 2.- The mill in accordance with claim 1, 1, of that, with the fact that one half of the discs is set in relation to the other half with an oblique inclination. 3, Mill PP, 1 and 2, about T L and so that the discs are made with radially directed ribs, 4, Ball mill according to PP.1-3, different from the fact that the size of the grinding bodies is reduced in side discharge pipe. Sources of information taken into account in the examination of 1, US Patent No. 3682399, CL, 02 C 17/16, 1969, 2. German patent number 589796, cl. 50 C 17/20, 1933. "