RU1832058C - Arrangement for controlling the process of column flotation - Google Patents

Abstract

The essence of the device is as follows. The column machine includes a chamber with aerators and a discharge device for unloading the chamber product. An extender is made in the upper part of the chamber, the two opposite side walls of which are configured to change the angle of their installation using a device for changing the angle of installation of the side walls of the expander. A solid flow rate sensor is installed in front of the machine chamber in the feed pulp, including a densitometer, a flow meter and a multiplication unit. The output of the solid flow sensor is connected to the input device of the device for changing the installation angle of the side walls of the expander and the motor control system, which by means of a gate changes the level of the foam product in the machine chamber. 1 ill.

Description

The invention relates to the field of mineral processing by flotation, and more particularly, to devices for controlling a flotation column process in pneumatic machines.

The purpose of the invention is to exceed the accuracy of controlling the flotation column process by ensuring that the specific surface of the foam layer matches the flow rate of solid in the pulp entering the flotation.

The essence of the device is as follows; The column machine includes a chamber with aerators and a discharge device for unloading the chamber product. An extender is made in the upper part of the machine chamber, the two opposite side walls of which are made with the possibility of changing the angle of their installation by means of a device for changing their angle of installation. In front of the car camera

a solid flow rate sensor is installed in the initial pulp, including a densitometer, a flow meter and a multiplication unit. The output of the solid flow sensor is connected to a drive device for adjusting the angle of installation of the side walls of the expander and an electric motor control system that, with the help of a gate, changes the level of foam product in the machine chamber.

The drawing shows a General view of the developed device. For simplicity, the flow control loop of the reagents supplied to the machine chamber is not shown.

The device includes a chamber 1. In the lower part of which aerators 2 and a device 3 for removing the chamber product are installed. In the upper part of the chamber 1, an expander 4 is made in the form of a truncated inverted pyramid, two opposite side walls 5 of which are made with the possibility of changing the angle of their installation (L

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ki. The side walls 5 are kinematically connected with the device 6 for changing the angle of their installation relative to the smaller base of the expander A. At the inlet of the machine chamber 1, a solid emulsion flow sensor 7 is installed, including a density meter 8, a flowmeter 9, and a multiplication unit 10. The output of the sensor 7 is electrically connected to the regulator 11 for changing the angle of installation of the side walls 5 of the expander 4. The output of the regulator 11 is connected to the drive device 12 and to the electric motor control system 13, which is connected to the gate 15.

The device operates as follows.

It is known that the process of column flotation of minerals is very significantly affected by the specific surface area of the foam layer in chamber 1 of the machine, i.e. the ratio of the mirror (surface) of the foam layer to the volume of the machine chamber itself (m2 / m3). Moreover, under all operating conditions of the machine, it is necessary that a proportional change in the specific surface of the foam layer corresponds to a change in the solid flow rate in the initial pulp. The pulp treated with the reagents is fed to the input of the chamber 1, and the solid content arriving at the flotation is determined using the solid sensor 7. In the chamber 1 of the machine, when air enters through the aerators 2, a column flotation process takes place, as a result of which the useful component in the form of a foam product is removed from the machine, and the chamber product (hbosts) is removed through the device 3.

If the solid flow rate in the initial pulp corresponds to the nominal setpoint, then the signal from the output of the sensor 7 to the controller 11 is not received, i.e. the specific surface of the foam layer remains unchanged.

In the case of an increase in the amount of solid in the initial pulp entering the flotation, a signal is received from the sensor 7 to the controller 11, which drives the drive device 12. kinematically connected to the device 6 for changing the installation angle of the side walls 5 of the expander 4. Side walls 5 move thereby increasing the area of the foam layer, i.e. the specific surface area of the foam layer in the expander 4 increases. At the same time: with this, the signal from the controller 11 enters through the control system 13 to the electric motor 14, which moves the gate 15, reducing the height of the foam layer in the chamber

1 machine, the change of which was caused by an increase in the mirror of the foam layer.

If the solid flow rate in the feed pulp is reduced relative to a predetermined

nominal value, the signal from the sensor 7 through the controller 11 is supplied to the drive device 12, which, by changing the angle of inclination of the side walls 5 of the expander 4, reduces the specific surface of the foam

About the layer. At the same time, the electric motor 14 is turned on and, moving the gate 15, increases the height of the foam layer in the chamber 1 of the machine, a change in which was caused by a decrease in the specific surface of the foam layer 5.

Thus, the developed device allows for all changes in the solid content in the initial pulp to provide a proportional change

0 specific surface of the foam layer, at the same time there is a change in the height of the foam layer in the chamber 1 of the machine, the change of which is caused by the regulation of the specific surface of the foam

5 layer. In other words, for all changes in the flow rate of solid in the initial pulp entering the column flotation, stabilization of the specific surface of the foam layer is ensured and

0 is the corresponding height of the foam layer in the machine chamber. All this creates good conditions for increasing the accuracy of controlling the flotation column process.

In order to determine the efficiency of the developed device in comparison with the device according to the main copyright certificate, comparative studies of the developed device and the main device with a column were carried out

0 flotation of manganese ores. The performed studies showed that due to stabilization of the specific surface of the foam layer with all changes in the flow rate of solid in the initial pulp, the developed device

5 provides improved control accuracy for the column flotation process, due to which, compared with the prototype, the extraction of manganese in concentrate is increased by 0.95%.

Claims (1)

0 Claims Device for controlling the process of column flotation according to ed. St. No. 1789282, characterized in that, in order to improve the accuracy of the process control by ensuring that the specific surface of the foam layer corresponds to the flow of solid in the pulp entering the flotation, it is equipped with a device for changing the height of the level of the pulp in the chamber of the flotation machine made of a gate located in the device for removing the chamber product and articulated with it by means of an electric motor and an electric motor control system, wherein a sensor for measuring solid flow in the pulp through a regulator for changing the angle of installation of the side walls of the expander is connected to the input of the electric motor control system. air, -, 4