RU1794476C - Ball mill - Google Patents

Description

Responsibly to the longitudinal axis of the mill cone. The raw material from the hopper 8 and the spring-loaded sub-hopper 9, is fed into the mill 4 by the universal vibrating feeder with a variable tilt angle of the tray 10. The change in the capacity of the bulk material is carried out by the capacity controller 13 and the regulating body, the hydraulic cylinder 14, for changing the angle of inclination of the tray 10.

Ball mill works as follows.

A weight sensor 11 is used as an intra-mill filling sensor, which, through a proportional pressure in the hydraulic cylinders 7, measures the mass moment of the entire grinding unit. This moment is equal to the product of the shoulder length by the total mass of the entire unit. The shoulder is equal to the length between the axis of the hydraulic cylinders 7 and the axis of the bearings 6 (constant value). The mass of the unit consists of the mass of balls and material (variable), as well as the mass of the mill, motor and frame (constant value). The weight sensor 11 measures the variable component of the slurry mass characterizing the grinding process in the mill. Such a sensor is simple and reliable in operation, has absolute noise immunity, and from the total weight value it is not difficult to calculate a signal proportional to the value of the variable spherical component.

The operating mode of the self-propelled guns is chosen so that, for example, with an increase in the weight of the material being ground relative to the set value, the signal of the sensor 11 through the controller 12 will act on the hydraulic cylinders 7, decreasing the angle of inclination d of the longitudinal axis of the mill 1 relative to the horizontal axis, and thereby increasing the fill factor sharbv at the beginning and reducing it at the end of the mill. The angle changing process will be carried out by the adjuster 12 until then. until the difference between the measured weight and the reference to the controller is equal to 0. Consecutively from the feedback sensor of the frame tilt adjuster 12, a signal is fed to the second channel, mill tilt-output. This signal moves through the performance controller 15 {the output of the hydraulic cylinder 14 so.

0

5

0

5

0

to reduce the angle of inclination of the tray vibrator 10. reduce the performance of the source material.

Thus, the algorithm of the ACS is composed as follows. so that with an increase in the ball-material component of the weight due to an increase in the amount of material, the hydraulic cylinders 7 reduce the angle d of the mill 1, and the vibratory feeder 10 reduces the productivity of the mill, and vice versa.

The boundary conditions for changing the angle of inclination of the longitudinal axis of the cone mill are from d - 0, at which the longitudinal axis of the mill coincides with the horizontal axis and f5max is its, where a is the angle of inclination of the generatrix of the cone with the horizontal axis. Under the second condition, the lower generatrix of the cone coincides with the horizontal axis. If the boundary conditions are not observed, the housing moves axially left or right, which will lead to the destruction of the bearings 2.

The rapid redistribution of the fill factor of the balls along the mill within the same ball load allows you to effectively affect the grinding process, since within the range of adjustment of the angle of inclination from 0 0 to yt and the fill factor is sequentially changed along the length of the conical body, respectively, FROM the beginning. r con. And the beginning. f con.

r con.

Since the reserves in ball mills are almost exhausted for making certain decisions to optimize the grinding process, the ball load, both its total quantity and distribution along the length of the mill, provides a decisive influence on the milled material, the prompt redistribution of grinding media in the cone mill, as a new regulatory impact allows, in combination with traditional influences, to radically expand the degree of freedom for optimal control of the cone mill.

The new regulatory effect will make it possible to really compensate for the unpredictably changing characteristics of the crushed material over time and to quickly switch to grinding grades of various types of cement, as well as to increase the specific surface area of cement and reduce the energy consumption for grinding.

Claims (1)

SUMMARY OF THE INVENTION A ball mill, comprising a truncated cone body located between the loading and unloading necks, a tray vibrator, an electric drive and a control system, characterized in that, in order to increase the grinding efficiency, it is equipped with hydraulic cylinders for changing the angle of inclination of the longitudinal axis of the mill cone, a hydraulic cylinder for changing the angle of inclination of the tray, with a frame supported on one side on the head sliding, and on the other hand, onto the hydraulic cylinders for changing the angle of inclination of the longitudinal axis of the mill cone, and the control system is made in the form of a weight sensor, capacity regulators and frame tilts, the weight sensor being connected to the input of the frame tilting regulator, the outputs of which are connected to the angle changing hydraulic cylinders tilting the longitudinal axis of the mill cone and to the input of the capacity controller, the output of which is connected to the hydraulic cylinder for changing the angle of inclination.