SU710640A1 - Method of automatic regulation of the process of disintegrating ore in mill operated jointly with classifier - Google Patents

Description

15th product when changing the physicomechanical properties of ore.

This goal is achieved by the fact that in the method of automatic regulation of the ore grinding process in a mill, working in conjunction with a classifier, including measuring and controlling the weight flow of ore and water at the inlet of the mill, corrected by the magnitude of the circulating load, the particle size of the original ore is additionally measured water consumption in the classifier, and when regulating the consumption of ore and water in the mill, additional correction is made for the size of the original ore, while changing the water consumption in the classifier depending on the measured consumption of ore and water at the inlet of the mill, and with an increase in the consumption of ore and water in the mill, water consumption in. classifier increase and vice versa.

The drawing shows a block diagram of the automatic control system.

The block diagram includes the drive motor 1 of the ore dispenser, block 2 of the water metering into the mill, unit 3 of the flow of water into the mill, the delay element 4 according to the signal ore flow into the mill, the dispenser 5 of the original ore, the regulator b of the flow of water. to the mill, weight sensor 7, water flow meter 8 to the mill, support element 9 on signal water flow to the mill, water metering unit 10 in the classifier, size sensor 11 in the ore, water meter 12 to the classifier, water flow controller 13 To classifier , the ore consumption regulator 14, the water / ore ratio setting unit in the classifier bath, the ore consumption initial setting unit 16, the classifier 17 solid flow meter 17, the computing device 18 According to this process control method is carried out as follows. The signal from the weight sensor 7 together with the signal of the size sensor 11 in the ore and the signal of the setting device 16 are fed to the input of the regulator 14 races, the progress of the ore controlling the ore feed pump 5 through the drive motor 1 of the ore meter 5 to the mill. The signal from the water flow meter 8 to the mill is supplied together with the signal from the weight sensor 7 and the setter 15 of the water / ore ratio in the classifier bath to the input of the water flow regulator 13 to the classifier that controls the water metering unit 10 to the classifier, and the signals from the weight sensor 7 and the flow meter 8 of water is fed to the mills not immediately, but after a time from the beginning of the disturbance at the mill mill: - BEFORE it occurs

at its output, i.e. transport delay, which is taken into account by delay elements 4 and 9,

The signals from the weight sensor 7 and the flow meter 17 are solid at the drain and the classifier is fed to the input of the computing device 18, by means of which the value of the circulating load is determined and corrective signals are generated, supplied

Q to the inputs of the regulators 14 and 6 ore consumption and water consumption in the mill.

When you change the size of the skylight 7UDY, for example, a large (smaller). side flow; ore and water in the mill reduce (increase)

5 is proportional to the change in size. After a time equal to the transport delay, when the material passes through the mill, taken into account delay elements 4

 and 9, reduce (increase) the flow of water into the classifier by an amount that ensures the constancy of the water / ore ratio in the classifier bath.

5 The circulating load may be of different sizes. If the ore is poorly milled, then the flow rate of the solid in the discharge of the classifier will decrease, and the computational

0 device 18, considering the integrated difference between the costs of the original ore and the solid at the discharge of the classifier, will record an increase in the circulating load and provide a correction signal to reduce the consumption of the original ore and water in the mill. If the ore is well milled, then the consumption of solid in the discharge of the classifier increases and everything will happen.

in reverse order. Water flow in

the classifier is adjusted according to the change in the ore and water consumption in the mill, maintaining the constancy of the water / ore ratio in the classifier bath and stabilizing the particle size distribution of the pulp at the discharge of the classifier.

Claims (2)

1. Author's certificate of the USSR W507359, cl. B 02 C 25/00, 1974. 2. The copyright certificate of the CCC. No. 503592, cl. B 02 C 25/00, 1973.