SU818649A1 - Method of automatic control of magnetic separation process - Google Patents

Description

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The present invention relates to the field of automation of beneficiation processes, in particular, the process of magnetic separation of manganese ores.

There is a method of controlling the process of magnetic separation, based on a change in the magnetic field strength depending on the content of magnetic material in the concentrate, with an adjustment on the content of magnetic material in the original ore | one.

The disadvantage of this method is that this method is unsuitable for maintaining optimal technological parameters of the process of magnetic separation of manganese ores, since continuous measurement of the content of the useful component in the concentrate and in the original ore is required. While maintaining a given quality of the concentrate by changing the magnetic field, the loss of the useful component in the tails is higher than planned, which is caused by the poor quality of the regulation.

There is also known a method of automatically controlling the process of magnetic separation by changing the intensity of the magnetic field, according to the magnitude of the algebraic

the sum of the density, the color of the pulp and the intensity of the magnetic field {2.

The disadvantage of this method is that while maintaining a given concentrate quality only by changing the magnetic field intensity, the loss of the useful component in the tails is higher than planned, which is caused by the poor quality of regulation.

The aim of the invention is to improve the quality of regulation.

This goal is achieved by additionally measuring the water consumption in the process and measuring it in proportion to the algebraic sum of the density and color of the pulp.

The drawing shows a block diagram of a system for automatically controlling the magnetic separation process.

The system of automatic control of the magnetic separation process includes a density sensor 1, a pulp color sensor 2, a computing unit 3, a magnetic field 4 intensity regulator, a sensor

magnetic field strength 5, thyristor amplifier 6, magnetic separator 7 (control object), WATER SUPPLY CONTROLLER E concentrate bath 8, sensor 9 supplying water to the concentrate bath, additional mechanism 10.

The device works as follows.

The density of the pulp is measured by sensor 1, the color of the pulp by sensor 2 and the signal is fed to the computing unit 3. One signal from the computing unit is fed to the input of the controller 4 and balanced with the signal from the magnetic field strength sensor 5, the regulator 4 through the thyristor amplifier 6 changes The magnetic field strength of the separator 7 (the object to be controlled) is applied. Another signal from the computing unit is fed to the input of the regulator 8 and is balanced by a signal from the sensor for supplying water to the concentrate bath 9. The regulator 8 via the actuator 10 changes the amount of water supplied to the concentrate bath of the magnetic separator 7.

During the enrichment of manganese ores on a magnetic separator, the main vozmush, Ayush, their effects are the content of the useful component, the mineralogical composition of the original ore and the density of the pulp. Therefore, the proposed method provides for the regulation of the magnetic field strength and the amount of water supplied to the concentrate bath, depending on the density and color of the pulp in the separator.

When the pulp density in the pulp color separator changes, the signals entering the computational unit 3 from the respective sensors 1 and 2 change. In the computational unit, the values regulating actions are calculated according to a certain algorithm. Signals are supplied to the regulators 4, 8 of the change in the intensity of the magnetic field and the redistribution of water between the baths of the concentrate and the tails, the regulator of the water supply to the concentrate bath 9.

When the pulp density in the separator changes and the color of the pulp changes, the signals arriving at the computing unit 3 from the respective sensors 1, 2 change.

These signals are sent to the controllers for the change in the intensity of the magnetic field 4 and the redistribution of water between the baths of the concentrate and the tails 8.

Thus, at different values of pulp color and density, the system of automatic control establishes different optimal magnetic field strengths and the amount of concentrate supplied to the bath, ensuring the maximum yield of conditioned concentrate.

The proposed method allows, by improving the quality of regulation, to increase the yield of manganese-based concentrate.

Claims (2)

1. Volotkovsky S. A. and others. Automation of the process of concentrating factories. M., Nedra, 1964, p. 181. 2. USSR author's certificate for application No. 2554753/03, cl. In the OZS 1/00, 1979.