SU808138A1 - Multichamber ball-type mill - Google Patents

Description

(54) MULTI-CAMERA BALL MILL

one

The invention relates to the fine grinding of solid and abrasive materials, such as cement clinker, and can be used in the building materials industry, in the metallurgical and mining industries, as well as in other branches of the national economy.

A multi-chamber mill is known, containing, and grinding chambers between the end caps, horizontal, the axes of which are located around the axis of rotation of the mill body and the drive 1

This mill makes it possible to obtain a finely ground product, but it is difficult to select in it. Optimal technological conditions when grinding materials with significantly different physical and mechanical properties from materials like cement clinker:

Closest to the present invention is a multi-chamber ball mill, comprising peripheral grinding chambers that form a common body, horizontally located around the central grinding drum, a loading and unloading device, as well as an actuator 2.

This mill is an economical unit in terms of specific energy consumption, however, due to design flaws, it is characterized by instability in operation.

The stable operation of mills of this type is due to the varying degree of filling of the grinding chambers with grinding bodies, which leads to uneven wear of the latter and their periodic loading through the loading hatches.

Violation of the uniform filling of the grinding chambers with grinding bodies leads to a decrease in the efficiency of the grinding process, causing unacceptable dynamic loads and noise in the drive.

The purpose of the invention is the uniform self-distribution of the grinding bodies along peripheral chambers and thereby increasing both the reliability and the efficiency of the mill.

Claims (2)

This goal is achieved by the fact that a multi-chamber ball mill containing a common body, peripheral grinding chambers horizontally arranged around a central axis of rotation, loading and unloading devices, and an actuator are equipped with a camera disposed on the side of the loading device. each, and each peripheral chamber is provided with a retaining plate mounted on its end on the side of the common chamber, in the center hole of each shaft Yby with an annular gap installed estrus, opened in a common chamber. FIG. 1 depicts a multi-chamber spar mill (self-distribution of body grinding but grinding chambers), general view; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows the node I in FIG. one; in fig. 4 - a mill with several slats in each peripheral chamber. The mill consists of horizontal grinding chambers 2 forming a common body 1 between prisoners loading lid 3 and a discharge lid 4 and sharing a common chamber 5. On the side of the common chamber, there is a backup washer 6 in each grinding chamber the formation of an annular gap 8 between them. The width of the retaining washer 6 is selected depending on the degree of filling of the grinding chambers with grinding bodies. The raw material is fed to the mill through the feed hopper 9 by screw 10, and the ground material is discharged by a discharge device 11 and screw 12. The mill body is supported on trunnion bearings 13 and 14. The mill operates as follows. The material to be crushed, for example, cement clinker, is fed through the feed funnel 9 with a jaw 10 into the common chamber .5 and further with the feeding chutes 7 is distributed through the grinding chambers 2. The grinding chamber passes, the material is crushed by the grinding bodies, a discharge device 11 and the screw 12 13 silos (not shown) are transported out of the mill and transported. When the mill body rotates, the grinding bodies, whose loading level is slightly higher than the hole in the retaining washer (Fig. 3), continuously flow between the grinding chambers, which exit through the annular gap 8, into the common chamber 5, and from there the loading chutes are directed to other grinding chambers. In the process of overflowing, the highest probability of exit will be from that grinding chamber, the level of grinding bodies in which is higher by a small amount. The uniform distribution of grinding bodies in the grinding chambers is achieved by the fact that a slight excess of the level of one of the grinding chambers causes a more intensive exit from it. Multi-chamber ball mill, comprising peripheral grinding chambers horizontally arranged around a central axis of rotation, loading and unloading devices, and an actuator forming a common body, as well as a drive with uniform distribution of grinding bodies along peripheral chambers the boot device is a chamber by which the peripheral grinding chambers are interconnected, and each peripheral chamber is provided with a retaining plate, is installed oval at its end from the side of the common chamber, while in the central hole of each of the shields with an annular gap a chute is installed, opened into a common chamber. Sources of information taken into account in the examination 1. UK patent number 250504, cl. In 02c, 1926. 2. USSR author's certificate number 547227, cl. B 02 C 17/06, 1977. FIG. rig. 3 2 v 5} a.