SU778786A1 - Apparatus for monitoring technological process in ball mill - Google Patents

Description

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The present invention relates to specific obobatiemM devices for continuously monitoring and recording the important technological factor i i6k pt5rb grinding .5

Ie: a device for controlling a technological process in a ball mill and a laser detector; a sound sensor that regulates loading, a regulating unit, and a registration unit fl. ten

This device does not allow rtddel to control such an important factor that most significantly affects the quality of grinding, as laapibsyro loading, which is necessary for high quality engraving using the process of measurement in accordance with its full description.

It is also known to control a ball mill process, containing a power sensor of a drive mill motor, KrdrShtor, three actuators, an accumulator, the output of which is connected to the recording device, and 25 outlets of the first unit: the unit is connected to the recording device, and 25 outlets of the first unit are assigned to the control unit, and the control unit will have a set of prefetches, and the output device 25 of the first unit: drive motor1 ШШ1ШЫ ПЩ (to the entrance. QuaiGatra, and the input of the first masterpiece

connected to a constant voltage source 2.

A disadvantage of this device is low: the accuracy of control of the ball mill technological process due to the influence of the instability of an electric current, which increases conversion errors in the device.

The purpose of the invention is to improve the accuracy of control.

This goal is achieved by the fact that in a device for controlling a technological process in a ball mill containing a power sensor of a drive motor of a mill, an oscillator, three setting devices, an adder, the output of which is connected to a registering device, and B1) 1 the flow of the first setting device is connected to one of the inputs of the adder, the output of the power sensor of the drive motor of the mill is connected to the input of the quad, and the input of the first sensor is connected to a "constant voltage source, the output of the power sensor of the drive motor mills of the connections to the input of the second set point, the squarer output is connected to the input of the third zadatchyka and outputs

The second and third presets are connected to other inputs of the adder.

The drawing shows a block diagram of a device for controlling a technological process in a ball mill.

The device contains a power sensor 1, a quad 2, controllers 3-5, an adder 6 and a recording device

The device works as follows

In the device circuit, the power sensor 1 converts the active power; P of the alternating current consumed by the drive motor of the mill into a DC voltage Up proportional to this power. Based on analog elements, the device produces a direct current voltage UQ proportional to the ball load GQ, in accordance with the mathematical model obtained by experimental statistical methods.

 . Ssch - ball loading {obgde

the weight of the balls in the mill);

P „- active power l f, engine mills;

l, (- the coefficients of the equation

regressions, determined experimentally by statistical methods; D - cynical error

predictions determined by the wear of the lining, changes in the lubrication conditions of the mill supports, the presence of pulp residues in the grill, etc. . The device solves the equation

VNvVp

  l.: .. ..::

where AO, A, A are dimensionless coefficients of the power of circuit elements associated with the coefficients a ,, §, and equation (1) through the similarity criteria

The power sensor 1 outputs a DC voltage Up, proportional to the active power P of the drive motor of the mill. The voltage Up is applied to the inputs of the quadrant 2 and the setter 3. From the output of the quadrant 2 / Up, the voltage proportional to the second power from the input is fed to the input of the setter 4. To the input of the setpoint 5, the outputs of the control terminals 3-5 are connected to separate inputs of the adder 6. The drivers allow adjusting the gain factors of equation (2) A A, A, depending on the specific operating conditions of the grinding unit. From the output of the adder, the constant voltage is

current.

Claims (2)

1. Goldin M.L. Monitoring and automating the processes of crushing and grinding ores. Atomizdat, 1971, - c.270-27 2. USSR author's certificate 316471, cl. В 02 С 15/10, 1969 (prototype).