SU1489841A1 - Method of controlling flotation process in pneumatic column-type machine - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to the flotation of minerals. The goal is to improve the control accuracy by promptly providing the required volume of the chamber of the column of an pneumatic machine and the dispersed composition of the gas phase of an air-pulp mixture of enriched material. In the chamber of the machine, the flotation rate is controlled by varying the volume of the chamber by moving the cone-shaped receiver of the flotation tails through the chamber of the machine. At the same time, the change in hydrostatic pressure of the pulp and air mixture of enriched material in the machine chamber is determined and the pressure of the air supplied to the flotation is proportional to it. In the flotation tails, the content of the valuable component is measured and the rate of flotation is directly proportional to it. In addition, the flow rate of air supplied to the flotation is measured, and the flow rate of air supplied to the discharge unit of the flotation tailings is proportionally controlled. 1 hp f-ly, 1 ill.

Description

The invention relates to methods for the flotation of minerals, and more specifically to methods and devices for automatically controlling the flotation process in pneumatic flotation machines of the column type.

The purpose of the invention is to improve the control accuracy due to the operational provision of the required volume of the machine chamber and the dispersed composition of the gas phase of the pulp-air mixture of the enriched material.

The drawing shows the device that implements this method.

The device comprises a chamber 1 of a column machine, a loading device 2 located in the upper part of the chamber 1 of the machine at an angle of 3 unloading the froth product and made vertically displaceable, dispersers 4 located in the lower part of the chamber 1 of the machine.

made with the possibility of vertical movement and rigidly connected to the receiver 5 of the flotation tailings of the chamber product on which the hydrostatic pressure sensor 6 is mounted. For vertical movement, the loading devices 2 and dispersants 4 with a receiver 6 of flotation tails are installed in guides 7 made along the height of the chamber 1 of the machine. The receiver 5 is connected by an elastic corrugated nozzle 8 to the flotation discharge section 9, in the lower part of which dispersers 10 are installed, and in the upper part there is an adjustable gate valve 11. At the output of the discharge section 9, the floatation quality analyzer 12, electrical output which is connected to the input of the controller 13 of the movement of the receiver 5 flotation tailings. Regulator tor 13 peN

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receiver 5 is connected to the actuator 14 of the vertical movement of the receiver 5. The electrical output of the hydrostatic pressure sensor 6 is connected to the input of the air pressure regulator 15, which controls the operation of the actuator 16 to supply air to the dispersants 4. On the air supply pipe to the dispersants 4, an air flow meter 7 is installed, the KOTOpoYo output is electrically connected to the inlet of the air supply controller 18 supplied to the dispersants 10. The air supply controller 18 controls the operation of the air supply actuator 19 -10 in Spirit dispersants located in the node 9 unloading flotation tailings. The vertical movement of the loading device 2 in the masking chamber 1 is carried out by means of a drive of the vertical movement of the loading device 2.

The essence of this method is as follows.

In the chamber, the column of a pneumatic maschina regulates the flotation rate by changing the chamber volume by moving the cone-shaped receiver 5 of flotation tails around the maschine chamber. The change in the hydrostatic pressure of the pulp-air mixture of the enriched material in the mashroom chamber is determined and the pressure of the air supplied to the flotation is changed proportionally to it, the content of the valuable component in the flotation tails is measured and the flotation rate is adjusted. Besides; measure the flow rate of air supplied to the flotation and proportionally regulate the flow of air supplied to the discharge unit of the flotation tailings.

The device works as follows.

The original pulp, pre-treated with reagents, enters the mashage chamber 1 through the loading device 2. The lightly-floated particles are fixed on air bubbles rising from the dispersants 4 and are discharged through the discharge unit 3 of the frothy product. Hard-floated particles move through the chamber 1 of the mask and, as they move, they are fixed on air bubbles rising from the dispersants 4. The empty rock is removed from the chamber of the mask through the discharge unit 9 of flotation tailings (chamber product).

When carrying out the flotation process in the pneumatic column mask, the flotation tails discharged through the adjustable gate valve 11 pass through the floatation quality analyzer 12, which

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This determines the content of the useful component in the flotation tails. A signal from the output of the analyzer 12 is fed to the input of the controller 13 for moving the receiver 5, which produces a signal to the input of the drive 14 for vertical movement of the receiver 5 of the flotation tails. When etsal, the receiver 5 of the chamber product moves vertically through the chamber 1 of the mashina and installs it at that height of the mashroom 1, which ensures the minimum content of the useful component in the flotation tails. The hydrostatic pressure sensor 6 detects the change in hydrostatic pressure that occurs when the installation height of the receiver 5 changes and generates a signal that is fed to the input of the air pressure regulator 15 supplied to the dispersants 4. The air pressure regulator 15 generates a signal to the input of the feed mechanism 16 air in dispersers 4. Flow meter 17 determines the change in air flow rate and delivers an electrical signal to the input of air flow controller 18, which, by controlling the operation of feed mechanism 19 air in dispersers 10, regulates the flow of air supplied to the dispersants 4.

Claims (2)

1. A method of controlling the flotation process in a pneumatic column machine, including controlling the flotation rate by changing the volume of the mashroom chamber, changing the flow rate of air supplied to the mashroom chamber and the flotation tailings discharge unit, characterized in that, in order to improve the control accuracy by ensuring the necessary the volume of the chamber of maschiny and the dispersed composition of the gas phase of the pulp-air mixture enriched with the bulk material, the content of the valuable component in the flotation tails is measured, the hydrostatic pressure It does not change the pressure of the air supplied to the process directly proportional to the hydrostatic pressure of the pulped mixture of enriched material in the machine chamber, while the flotation rate is adjusted directly proportional to the content of the valuable product in the flotation tails. 2. A method according to claim 1, characterized in that the flow rate of the air supplied to the process is measured, and the change in the flow rate of the air supplied to the discharge unit of the flotation tails is corrected by it. Nutrition go Foam foam