SU507358A1 - Device for controlling the loading of the drum mill - Google Patents

Description

(54) DEVICE FOR MANAGING THE LOADING OF THE DRUM MILL

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filter 5. The output of the smoothing filter -p 5 is included at the input of the regulator 6 zazgrue. mills ore. The output of the regulator 6 is connected to the vibrating unit 7 of the bunker 8 with ore. Mill 9y connected to vibratory feeder 7 {see FIG. 16), operates in a closed loop with a classifier 10 and is rotated by an electric motor 11, the stator circuit of which is turned on

12 degrees of filling of the mill, for example, the instantaneous value of the composition power parameter (see Fig. 16). The sensor 12 used is placed on the shaft connecting the mill 9 and its driving motor 11. The output of the smoothing filter 5 is connected to the input of the regulator 13 of the ball loading of the mill, the output of the regulator 13 is connected to the balloon generator 14 of the ball 15.

The device works as follows.

When the drum mill rotates, the ore load for an auto-grinding mill or ore-ball load for a ball mill is carried along by the rotating lining of the mill, the center of gravity of the load of the mill deviates by some angle from the vertical axis of symmetry until the load force is tangent. there will be no more force between the load and the lining of the mill, after which the load slides down until the balance between the tangential component of gravity and inertia on one side is restored and friction-xoy the other hand, then the oscillation center tyzhesti process is repeated. The oscillation of the center of the load bar of the mill leads to Kélebani (active power, the stator current of the drive motor of the mill, the moment on its shaft, etc., the component of the water intensity parameter consumed by the mill, and the modulating oscillations are center oscillations the mill load, and the carriers, the instantaneous values of the power parameter.

For the Cascade-type self-grinding mill, with an increase in the ore load, the dispersion of oscillations in the center of the gravity of the load of the mill with a frequency of 3–5 Hz decreases, while with a decrease in the load of the mill with ore, it increases. For ball mills with an MSHR 3.6 X 4.0 type grating, the dispersion of oscillations of the center of the load bar, the mills with a frequency of 8-10 TC, depends on the size of the ball loading of the mill and the wear of the lining profile in such a way that Diss prsi increases and vice versa, with ds358-y

loading balls into a mill mill (h; h; and mind n-sh,

The instantaneous values of the power parameter are measured by sensor 12. g, The modulated oscillation wave is shown in FIG. 2a. The modulated oscillations of the subshots are on demodulator 1, which allocates an omni-modulated oscillation {see FIG. 26), the Ose & opopic filter 2 separates from the envelope oscillations of such a frequency that characterize the magnitude of the load of the mill with ore or balls. For example, when regulating the load of a Cascade 15 wet self-grinding mill, the narrowband filter selects oscillations: with a frequency of 3-5 Hz, and When regulating the ball load of MSR 3.6-4.0 mills with wave lining, a narrow-band filter will oscillate at a frequency of 8-10 Hz. Q; The frequency allocated by the filter depends on the type of mill, lining, and the decision made to work the mill, and is determined experimentally in each particular case. After amplification by the amplifier 3 and detection of the amping detector using 4, the oscillator 5 of which is shown in FIG. 2d, fall on a smoothing filter 5, which smooths out vibrations to the form shown in FIG. 2d The smoothed oscillations serve as a feedback signal to the ore mill regulator 6, where this signal, proportional to the dispersion of oscillations characterizing the mill loading with ore, is compared with Data and changes the performance of vibratory feeders 7 so that this signal, and hence the filling of the mill ore, steel equal to the specified value. FIG. 16, the smoothed voltage supplies J- as a feedback signal to the regulator 13 of the mill loading balls, where this signal, proportional to the oscillations in the Hz frequency, is compared to this data and loads the balls into the mill until the mill is filled with balls equal to the optimal value, and the dispersion of oscillations with a frequency of 8-10 HZ will not be equal to the specified value.

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Claims (1)

Invention Formula A device for controlling the loading of the drum mill, ss / holding the loading controller and The sensor of the degree of filling of the mill, which is characterized by the fact that, in order to improve the quality of regulation and reliability of the device, it is additionally equipped with a sequence of demodulator, narrowband thunder, descaler, amplified detector to a smoothing filter, and the output of the sensor degree of filling of the mill 507358.S I is connected to the input of the demodulator, and vi smoothing filter - with the input of the controller. download. but I Backside 1 FIG. g