SU1750734A2 - Device for controlling flotation in pneumatic column of flotation machine - Google Patents

Abstract

The essence of the invention is that the device includes a solid flow meter in the pulp fed to the flotation, including density meter 1, flow meter 2, multiplication unit 3, comparing the device 4 with the flow regulator of reagents supplied to the flotation, the machine chamber with cylindrical containers 7, 8.9, mounted coaxially, an annular gap 10 between the container 7 and 8, aerators 11,12,13,14, located in the respective chambers and containers 6,7,8,9, in the upper part of the chamber 6 a loading device 15 is installed and unloading devices 16 for pa Foam product loading through the pipes 17, the annular gap 10 is controlled by an annular gate 18, moved by the drive 19, electrically connected with an adjustable delay unit 20, the pipes 21 and 22 installed at the bottom of the machine are designed to unload the chamber product (tails), the sensor output the flow rate of the solid connection to the lag time regulator, which through the actuator 24 is electrically connected with the adjustable lag unit. 1 il. (L

Description

The invention relates to the enrichment of minerals, and more specifically to devices for controlling the process of flotation column.

A device is known that includes a column machine with vertical tanks mounted coaxially with an annular gap between the countercurrent and directing tanks, a solid flow sensor is installed at the entrance of the machine, including a density meter, a slurry meter and a multiplication unit, a solid flow meter output through the controller and the delay unit connected to an electric motor, which is associated with a ring gate. Moving the annular gate in the vertical direction provides a change in the size of the annular gap between the countercurrent and the flow capacities of the chamber of the column machine.

A significant disadvantage of the known device is the relatively low control accuracy of the flotation column process due to the impossibility of ensuring that the correction of the capacitive and transport lag correlates with the solid flow in the original pulp fed to the column flotation.

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

The essence of the invention is that the developed device includes a chamber of a column machine with straight lines.

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and countercurrent capacitors mounted coaxially, with an annular gap between them, a solid flow sensor is installed at the device inlet, the output of which is through the regulator; the delay unit is connected to an electric motor that moves the annular gate that adjusts the annular gap between the countercurrent and direct chamber capacitors cars.

The goal is achieved by the fact that the proposed device includes a lag time correction regulator and an actuator, wherein the electric output of a solid flow meter in the pulp fed to the flotation is connected to the lag time correction regulator input, and the lag time correction regulator output through an actuator electrically connected to the delay unit,

The drawing shows the proposed device.

A device for controlling the flotation process in a pneumatic column machine, includes a density meter 1, a pulp flow meter 2 and an multiplication unit 3 (the elements 1,2,3 are a solid flow sensor supplied to the column flotation), the output of the multiplying unit 3 is connected via a comparator device 4 with a reagent consumption regulator 5, which provides control over the consumption of reagents supplied to the chamber of a column machine consisting of concentrically installed tanks 7,8,9, while the containers 7 and 8 in the lower part form rings e hole (annular gap) 10, in the lower part of the containers 6,7,8 and 9 are installed aerators 11, 12, 13 and 14, respectively, in the upper part of the chamber of the machine installed the loading device 15, through the unloading device 16 and the nozzle 17 is unloading foam product, the annular gap 10 is controlled (closed) by an annular gate 18, which is moved by an actuator 19, electrically connected to the delay unit (delay element) 20, in the lower part of the machine chamber are installed nozzles 21 and 22 for unloading the chamber product (tail s), the output of multiplication unit 3 is electrically connected to the input of the delay time correction controller 23, the electrical output of which is connected to the regulating unit of the delay unit 20 via an actuator 24.

The device works as follows

When feeding the pulp to the input of the flotation machine, the density meter 1 and the flow meter 2

determine the density and flow rate of the pulp entering the enrichment; Signals corresponding to the measured parameters are fed to the input of the multiplication unit 3,

the output of which is affected by a signal corresponding to the flow of solids in the pulp. The signal from multiplication unit 3 through comparing device 4 is fed to the input of the reagent consumption controller 5, which

0 regulates the flow of reagents to the flotation in proportion to the flow of solid.

Through the loading device 15, the slurry with reagents enters the flotation into the chamber 6 of the flotation machine directly onto the foam layer formed by air entering the chamber 6 through the aerators 11. Here the flotation of readily flooded mineral particles occurs, which are discharged with the foam layer

0 a discharge device 16 and through pipes 17 are removed from the further flotation process. The chamber product falls through the aerators 11 and enters the tank 7 where the countercurrent process takes place.

5 flotation. In this case, the foam product is discharged through the discharge device 16 and is removed through the pipes 17. The non-flotation material through the annular opening (annular gap) 10 enters the

0 direct flotation into tank 8, and the waste rock falls through aerators 13 and is removed through nozzles 21.

The material that has entered through the annular gap 10 into the tank 8 passes through a continuous flotation. The frothy product of the tank 8 is combined with the frothy product of the tank 7 and is removed through the device 16 and through the nozzles 17. The non-floated mineral particles enter the tank 9 on

0 additional counterflow flotation. The foam product of the tank 9 is combined with the foam product of the tanks 7 and 8 and is discharged through the discharge device 16 and is discharged through pipes 17 from further

5 enrichment process. The waste rock (tails) in this case falls through the aerators 14 and is removed through the nozzle 22.

When the flow rate of the solid in the pulp entering the flotation is changed, the regulator of the consumption of reagents 5 provides proportional control (change) of the supply of reagents to flotation. At the same time, the signal from the controller 5 is fed to the input of the delay unit 20 (the element

5 delay), which, with a time delay corresponding to the capacitive and transport lag of the tank 8, drives the motor 19 of the gate 18. This causes a vertical movement of the ring gate 18, which changes the size of the ring gap 10, which leads to a change in the flow rate of air-to-air mixtures in tanks 7.8 and 9, due to this, the flotation time in the flow and counter vessels of the machine chamber is regulated. Due to the fact that when the flow rate of the solid entering the flotation changes, the transport lag time becomes necessary to change the lag time of unit 20, i.e. change the setting of the delay unit (delay element). At the same time, the lag time must be inversely proportional to the change in the solid flow rate in the original pulp. Thus, for all changes in the solid flow rate, simultaneously with the regulation of the size of the annular gap 10, the delay time is controlled. This is done as follows. The signal from multiplication unit 3 is continuously fed to the input of the delay time correction controller 23, and the signal from the output of controller 23 is fed to the input of the actuator 24. which is connected to the regulating unit of the delay unit 20. Proportional to the value of the signal at the controller output 23 occurs changing the setpoint (lag time) at block 20. Introducing an additional correction for changing the setpoint of lag time at the lag unit, as compared with the known device, provides improved control accuracy The proposed device, thereby increasing the extraction of the useful component in the concentrate. At the same time, the increase in extraction of the useful component in the concentrate unambiguously corresponds to the increase (increase) in the accuracy of control of the process of flotation column. To determine the effectiveness of the proposed device in comparison with the known at the beneficiation plant, comparative studies were carried out for the enrichment of manganese ores. As shown by the studies performed, the proposed device provides an increase in the extraction of manganese in the concentrate by 0.35% compared to the known one.

Claims (1)

Invention Formula Device for controlling the flotation process in a pneumatic column of a flotation machine according to auth.St. No. 1169752, characterized in that, in order to improve the control accuracy of the flotation process by ensuring that the correction of capacitive and transport lag is consistent with the flow of solids in the pulp supplied to enrichment, it additionally includes a lag time correction controller and an actuator, while the electrical output of the sensors the flow rate of solid in the pulp entering the flotation is connected to the electrical input of the lag time correction controller, and the lag time correction controller output through an actuator electrically connected to the delay element. Reagents Nutrition Jlmxj tf. 6-11 $ ooooh at lx JJ foamy product 7  8 9 Waste (tails) Air nineteen Waste (tails)