CN215197609U

CN215197609U - Counter-flow type flotation column and feeding structure thereof

Info

Publication number: CN215197609U
Application number: CN202120103213.2U
Authority: CN
Inventors: 马驰宇; 孙伟; 胡岳华; 马士强
Original assignee: Central South University
Current assignee: Central South University
Priority date: 2021-01-14
Filing date: 2021-01-14
Publication date: 2021-12-17
Anticipated expiration: 2031-01-14

Abstract

The utility model discloses a counter-flow type flotation column and feed structure thereof aims at improving the separation efficiency and the ore pulp unit throughput of flotation column. The counter-flow flotation column feeding structure comprises a stator, a first feeding device and a second feeding device, wherein the stator is arranged in the upper part of a flotation column body; the inflation chamber is arranged at the bottom of the flotation column body, an ore pulp feeding pipe and an inflation pipe are arranged on the inflation chamber, and the inflation chamber is communicated with the bottom of the stator through a lifting pipe; the centrifugal impeller is arranged in the stator, and the side wall of the stator is uniformly distributed with slurry discharge holes around the centrifugal impeller; the driving mechanism is arranged on the flotation column body and used for driving the centrifugal impeller to rotate relative to the stator; and after the ore pulp enters the stator through the riser, the ore pulp is discharged into the flotation column body from the pulp discharge hole of the stator by changing the flow direction under the action of the centrifugal impeller.

Description

Counter-flow type flotation column and feeding structure thereof

Technical Field

The utility model belongs to the technical field of mineral processing, especially, relate to a counter current type flotation column and feed structure thereof.

Background

The existing feeding devices of the counter-flow type flotation column have two types: one is to arrange a certain height of ore pulp feeding pool above the flotation column for feeding, the other is to directly feed the ore pulp into the ore column by pumping, and the ore pulp is dispersed in the main body by using a certain feeding pressure, and the two feeding modes can not achieve the ideal mineralization effect. There are major problems:

1. the ore feeding pressure is limited, the ore pulp can not be sent to a remote place, a plurality of ore pulp flows are rapidly reduced near the ore feeder, and the formed ore pulp flows can directly pass through the foam layer and be discharged from tailings, which is similar to the short circuit phenomenon of a flotation machine;

2. the probability of collision between the foam at the periphery of the flotation column and the feed is low, the utilization rate of foam mineralization is low, and particularly when the yield of the concentrate is high, the bearing capacity of the foam on the floating mineral is influenced;

3. although the ore pulp flow has the opportunity of being mineralized in the descending process, the mineralized foam is easy to fall off in the floating process due to the impact of the downward flowing ore pulp, and the main reason for the low recovery rate of the coarse fraction of the reverse flow type flotation column is also caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a counter current type flotation column and feed structure thereof aims at strengthening the mineralization of feed, improves the separation efficiency height and the ore pulp unit throughput of flotation column.

To this end, the present application provides, in one aspect, a reverse flow flotation column feed structure comprising:

a counter-flow flotation column feed structure, comprising:

the stator is arranged in the upper part of the flotation column body;

the inflation chamber is arranged at the bottom of the flotation column body, an ore pulp feeding pipe and an inflation pipe are arranged on the inflation chamber, and the inflation chamber is communicated with the bottom of the stator through a lifting pipe;

the centrifugal impeller is arranged in the stator, and the side wall of the stator is uniformly distributed with slurry discharge holes around the periphery of the centrifugal impeller;

the driving mechanism is arranged on the flotation column body and used for driving the centrifugal impeller to rotate relative to the stator;

the ore pulp changes the ore pulp flow direction under the effect of centrifugal impeller and is radially and evenly discharged to the flotation column cylinder from the pulp discharge hole.

Specifically, the riser is vertically disposed in the flotation column.

Specifically, the plenum is disposed outside the bottom of the flotation column.

Specifically, the gas filling pipe is aligned with the riser.

Specifically, the ore pulp feeding pipe is communicated with the ore pulp feeding tank.

Specifically, a turbulator is arranged in the lifting pipe.

Specifically, the turbulators comprise a plurality of spoilers which are arranged on the inner walls of two sides of the riser in a staggered mode.

A reverse flow type flotation column adopts the reverse flow type flotation column feeding structure, a concentrate outlet is formed in the top of a flotation column body, a tailing outlet is formed in the bottom of the flotation column body, and a bubble generator is further arranged in the lower portion of the flotation column body.

Specifically, the reverse flow type flotation column further comprises:

the lifting stirrer comprises a stirring tank body and a lifting impeller arranged in the stirring tank body, and the stirring tank body is provided with a slurry inlet and a slurry outlet;

the liquid level detection device is arranged on the flotation column body and used for sensing the liquid level in the flotation column body;

the controller is used for receiving a feedback signal of the liquid level detection device and controlling the rotating speed of the lifting impeller according to the received feedback signal;

one end of the slurry discharge pipe is communicated with a tailing outlet at the bottom of the flotation column body, and the other end of the slurry discharge pipe is communicated with the slurry inlet;

and the ore pulp entering from the pulp discharge pipe is lifted to a set height under the action of the lifting impeller and then is discharged from the pulp outlet.

Specifically, be equipped with the medicament on the stirring cell body and add the mouth, the grout outlet with be located the low reaches the ore pulp feed pipe intercommunication of flotation column cylinder makes the stirring cell body directly acts as the low reaches the ore pulp feeding pond of flotation column cylinder.

Compared with the prior art, the utility model discloses the beneficial effect who has lies in:

compared with the feeding of the existing ore pulp feeding tank, the ore pulp is mixed with air, the specific gravity of the fluid is smaller than that of the fluid entering the ore pulp, the ore pulp can be lifted to a position higher than the liquid level of the entering ore pulp by being similar to an air lifting device, auxiliary pumping equipment can be replaced, the production operation is convenient, and energy is saved.

Compared with the feeding of the existing ore pulp feeding pool, the solid, liquid and gas three-phase flow fluid is mineralized twice through the lifting pipe and the stirring device, so that the mineralization effect of the ore pulp flow entering the cylinder is good, and the ore dressing recovery rate is improved.

In addition, because the centrifugal impeller and the fixed stator have the pressure reduction effect on the ore pulp and the good ore separation effect on the ore pulp, a stable ore pulp layer and a foam layer are generated under the lower stirring strength. When the ore pulp is mineralized on the upper part of the flotation column, the mineralized foam can be conveniently and timely discharged under the support of bubbles rising from the bottom of the column body, and the mineralized foam is favorable for improving the recovery rate of floating minerals and particularly favorable for recovering coarse fraction. The separation efficiency of the flotation column and the pulp treatment capacity of the flotation column in unit volume can be greatly improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic diagram of a counter-flow flotation column according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of another countercurrent flotation column structure provided by an embodiment of the present invention;

wherein: 1. a stator; 2. a plenum chamber; 3. a centrifugal impeller; 4. a drive mechanism; 5. a flotation column body; 6. a pulp feed pipe; 7. an inflation tube; 8. a riser tube; 9. a concentrate outlet; 10. a turbulator; 11. a tailing outlet; 12. a bubble generator; 13. a control valve; 14. a liquid level detection device; 1401. an ultrasonic liquid level sensor; 1402. a float bowl; 15. a controller; 16. a slurry discharge pipe; 17. a stirring tank body; 18. a stirring shaft; 19. lifting the impeller; 20. a motor; 21. and a pulp feeding tank.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, a reverse flow type flotation column feed structure, including stator 1, plenum chamber 2, centrifugal impeller 3 and actuating mechanism 4, stator 1 is fixed to be set up in the upper portion of flotation column cylinder 5, and open-top setting, plenum chamber 2 sets up the bottom at flotation column cylinder 5, be equipped with ore pulp feed pipe 6 and gas tube 7 on the plenum chamber 2, communicate through riser 8 between the bottom of plenum chamber 2 and stator 1, centrifugal impeller 3 sets up in stator 1's upper portion opening, it has the hole of arranging the thick liquid around centrifugal impeller 3 evenly distributed on stator 1's the lateral wall, actuating mechanism 4 sets up on flotation column cylinder 5, be used for driving centrifugal impeller 3 and rotate 1 relative stator.

In the embodiment, the bottom of a flotation column body 5 is provided with an inflation chamber 2, the upper part of the flotation column body is provided with a stirrer consisting of a centrifugal impeller 3 and a stator 1, the inflation chamber 2 and the stator 1 which are arranged up and down are connected through a lifting pipe 8, ore pulp of an ore pulp feeding pipe 6 enters from the bottom of the flotation column body 5 and is mixed with gas in the inflation chamber 2, solid-liquid-gas three phases flow through the lifting pipe 8 and enter into the stator 1, when the ore pulp rises to the top of the flotation column body 5, mineralization is generated under the action of the stirrer consisting of the centrifugal impeller 3 and the stator 1, meanwhile, the kinetic energy of fluid generated by rising of the ore pulp is eliminated, the flow direction of the ore pulp is changed, and the ore pulp is sprayed out of a pulp discharge hole of the stator 1 in the radial direction of the flotation column body and is uniformly dispersed in the flotation column body.

In addition, because the centrifugal impeller 3 and the stator 4 have the pressure reduction effect on the ore pulp, the ore pulp has good ore separation effect, a stable ore pulp layer and a foam layer are generated under low stirring intensity, when the concentrate outlet 9 of the ore pulp is arranged on the upper part of the flotation column body 5, the mineralized foam can be conveniently and timely discharged, the recovery rate of the floating mineral can be favorably improved, the coarse fraction recovery is particularly favorably realized, and the separation efficiency of the flotation column body 5 and the unit processing capacity of the ore pulp can be greatly improved.

In some possible embodiments, a turbulator 10 can be further arranged in the riser pipe 8, and due to the action of the turbulator 10 in the riser pipe 8, the flow direction of the fluid in the riser pipe 8 is continuously changed to form turbulence, so that the ore pulp is preliminarily mineralized, and the flotation efficiency can be improved.

In this embodiment, the turbulators 10 include a plurality of spoilers alternately disposed on the inner walls of the two sides of the riser 8, and due to the action of the baffles in the riser, the flow direction of the fluid is continuously changed to form turbulent flow, so as to generate a certain mineralization. Of course, the turbulators 10 may also be of other configurations that can create turbulence in the fluid, and will not be described in detail herein.

It will be appreciated that to further improve the lifting effect and reduce the lifting resistance, the lifting tube 8 is a straight tube and is vertically arranged in the flotation column 5, one end of the lifting tube 8 communicates with the top of the plenum chamber 2 and the other end communicates with the bottom of the stator 1, and the gas-filled tube 7 is directly aligned with the lifting tube 8.

In the actual design, to facilitate the installation and connection of the riser 8, the gas-filled pipe 7 and the slurry feed pipe 6, the plenum chamber 2 is arranged outside the bottom of the flotation column 5.

In some possible embodiments, the slurry feeding pipe 6 is communicated with the slurry feeding tank 21, and the slurry feeding tank 21 is arranged at a certain height for feeding, so that the requirement on the installation height of the slurry feeding tank 21 can be effectively reduced compared with the original feeding of the slurry feeding tank 21. Of course, it is obvious to those skilled in the art that the slurry feeding pipe 6 can be directly connected to the feeding pump, and the slurry is directly fed by pumping, and the slurry is dispersed in the main body by using a certain feeding pressure, so that the requirement on the feeding pressure can be reduced compared with the original pumping feeding.

Referring to fig. 1, a reverse flow type flotation column adopts the feeding structure of the reverse flow type flotation column, a concentrate outlet 9 is arranged at the top of a flotation column body 5, a tailing outlet 11 is arranged at the bottom of the flotation column body, and a bubble generator 12 is further arranged in the lower part of the flotation column body.

In the embodiment, the centrifugal impeller 3 is used for stirring ore pulp and gas coming from the outside, uniformly dispersing the sheared and mineralized ore pulp into the flotation column body 5, the bubble generator 12 is arranged at the lower part of the flotation column body 5, rising bubbles continuously collide with sinking ore pulp in a convection way, floating minerals in the ore pulp are collected, and the bubbles rising to the upper part of the upper support are quickly discharged; the non-floating ore pulp passes through the floating foam and is discharged from the bottom of the flotation column body 5. The feeding and mineralization of the ore pulp are arranged at the upper part of the flotation column body 5, so that the mineralized foam can be discharged in time, and the feeding and mineralization of the ore pulp are beneficial to improving the recovery rate of the floating mineral, especially to the recovery of coarse fraction.

In practical application, in order to ensure the uniformity of air distribution, a plurality of bubble generators 12 can be uniformly distributed along the outer contour line of the cross section of the flotation column cylinder 5, and the bubble generators 12 can adopt micropore bubble generators 12 or air gun bubblers. The driving mechanism 4 comprises a driving motor and a gear transmission mechanism connected with a main shaft of the driving motor and the stirring shaft, and a belt transmission mechanism or a chain transmission mechanism can be adopted as a transmission mechanism between the driving motor and the stirring shaft.

Referring to figure 1, in some possible embodiments, the inner bottom end surface of the column 5 is a sloped surface, and the tailings outlet 11 is arranged at the lowest end of the sloped surface, in such a way that the tailings discharge is utilized. As regards the cross-sectional shape of the flotation column cylinder 5, it can be designed as a circle, square or other shape.

Referring to fig. 1, it can be understood that the tailings outlet 11 is provided with a control valve 13, the flotation column 5 is provided with a liquid level detection device 14 for measuring the liquid level position in the flotation column 5, and both the liquid level detection device 14 and the control valve 13 are controlled by a controller 15 of the flotation device.

The controller 15 may be a PLC controller, the liquid level detection device 14 is composed of an ultrasonic liquid level sensor 1401 and a float 1402, of course, the liquid level detection device 14 may also be another type of liquid level detection device, and the slurry suction port at the bottom of the centrifugal impeller 3 is aligned with the top opening of the stator 1, and the gap between the two may be controlled as small as possible.

Referring to fig. 1, in this embodiment, the liquid level in the flotation column 5 can be flexibly adjusted by controlling the opening angle of the control valve 13, when the liquid level in the flotation column 5 rises, the liquid level detection device 14 feeds back a signal to the controller 15, the controller 15 sends a control instruction to the control valve 13, the opening of the control valve 13 is increased, the ore discharge amount at the bottom of the flotation column 5 is increased, the ore pulp amount discharged from the flotation column 5 is greater than the ore pulp amount fed in, and the ore pulp liquid level in the flotation column 5 falls; similarly, when the ore pulp liquid level in the flotation column body 5 is reduced, the liquid level detection device 14 feeds back a signal to the controller 15, the controller 15 sends a control instruction to the control valve 13, the opening degree of the control valve 13 is reduced, the ore discharge amount at the bottom of the flotation column body 5 is reduced, and the liquid level is reduced, so that the purpose of stabilizing the liquid level is achieved.

Referring to fig. 2, in another possible implementation scheme, the counter flow type flotation column may further employ a liquid level control system having a structure that further includes a lifting stirrer, a liquid level detection device 14, a controller 15, and a slurry discharge pipe 16, where the lifting stirrer includes a stirring tank 17 and a stirring shaft 18 vertically disposed in the stirring tank 17, a lifting impeller 19 is disposed at a bottom end of the stirring shaft 18, a motor 20 for driving the stirring shaft 18 to rotate is disposed on the stirring tank 17, the motor 20 and the liquid level detection device 14 are electrically connected to the controller 15, the stirring tank 17 is provided with a slurry inlet and a slurry outlet, the liquid level detection device 14 is disposed on the flotation column body 5 for sensing a liquid level in the flotation column body 5, the controller 15 is configured to receive a feedback signal from the liquid level detection device 14 and control a rotation speed of the lifting impeller 19 according to the received feedback signal, one end of the slurry discharge pipe 16 is communicated with the slurry discharge port at the bottom of the flotation column body 5, the other end is communicated with the pulp inlet, and the pulp entering from the pulp discharge pipe 16 is lifted to a set height under the action of the lifting impeller 191 and then is discharged from the pulp outlet.

This embodiment flotation machine liquid level control system, the pulp potential energy of make full use of upper reaches flotation column cylinder 5 utilizes lower energy consumption can promote the pulp to certain height to satisfy the same horizontal feed requirement of configuration flotation column cylinder 5 of low reaches, have simple structure, convenient operation's advantage.

In some possible embodiments, a chemical agent adding port (not shown in the figure) is further provided on the agitating tank 17, and a slurry outlet of the agitating tank 17 is communicated with the slurry feeding pipe 6 of the downstream flotation column 5, so that the agitating tank 17 directly serves as a slurry feeding pool 21 of the downstream flotation column 5. In this embodiment, be equipped with the medicament on stirring tank body 17 and add the mouth, the flotation reagent adds the back from the medicament, utilizes the energy dissipation of ore pulp promotion impeller 19, with flotation reagent and ore pulp misce bene, need not additionally to increase medicament agitated vessel.

In addition, this embodiment is through a promotion agitator cooperation liquid level detection device 14 and controller 15, has realized the function of liquid level control, ore pulp promotion and medicament stirring promptly, compares traditional valve + stirring cell body 17 and sand pump's structure, has simplified equipment configuration, has reduced equipment input cost, can not have the problem that need frequently change easy wearing and tearing such as valve, sand pump moreover.

Referring to fig. 2, it can be understood that, in practical application, the slurry inlet is disposed in the middle of the bottom end of the agitation tank 17, the slurry suction port of the lifting impeller 19 is in butt joint with the slurry inlet, the lifting impeller 19 includes upper and lower disks and a spiral rib disposed between the upper and lower disks, the lifting impeller 19 is fixed at the lower portion of the agitation shaft 18, when the agitation tank 17 works, the agitation shaft 18 rotates to drive the lifting impeller 19 to rotate, the slurry between the upper and lower disks of the lifting impeller 19 is thrown out due to centrifugal force, the slurry is supplemented into the lifting impeller 19 through the slurry discharge pipe 16 and the slurry inlet to enter the agitation tank 17 and is continuously pushed upward, and finally enters the downstream flotation column body 5 from the slurry outlet of the agitation tank 17.

The above examples are merely illustrative of the present invention clearly and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Nor is it intended to be exhaustive of all embodiments. And obvious changes and modifications may be made without departing from the scope of the present invention.

Claims

1. A counter-flow flotation column feed structure, comprising:

the stator (1) is arranged in the upper part of the flotation column body (5);

the inflation chamber (2) is arranged at the bottom of the flotation column cylinder (5), an ore pulp feeding pipe (6) and an inflation pipe (7) are arranged on the inflation chamber (2), and the inflation chamber (2) is communicated with the bottom of the stator (1) through a lifting pipe (8);

a centrifugal impeller (3) disposed in the stator (1);

the driving mechanism (4) is arranged on the flotation column body (5) and is used for driving the centrifugal impeller (3) to rotate relative to the stator (1);

the side wall of the stator (1) is uniformly distributed with slurry discharging holes around the periphery of the centrifugal impeller (3), and the ore slurry is uniformly discharged into the flotation column body (5) from the slurry discharging holes in the radial direction after changing the flow direction under the action of the centrifugal impeller (3).

2. A reverse flow flotation column feed structure according to claim 1, wherein: the riser (8) is arranged vertically in the flotation column cylinder (5).

3. A reverse flow flotation column feed structure according to claim 2, wherein: the plenum chamber (2) is arranged outside the bottom of the flotation column cylinder (5).

4. A reverse flow flotation column feed structure according to claim 3, wherein: the gas filling pipe (7) is aligned with the riser pipe (8).

5. A reverse flow flotation column feed structure according to claim 1, wherein: the ore pulp feeding pipe (6) is communicated with the ore pulp feeding pool (21).

6. A counter flow type flotation column feed structure according to any one of claims 1 to 5, wherein: a turbulator (10) is arranged in the lifting pipe (8).

7. The reverse flow flotation column feed structure of claim 6, wherein: the turbulator (10) comprises a plurality of spoilers which are arranged on the inner walls of the two sides of the riser (8) in a staggered mode.

8. A reverse flow flotation column, comprising: a feeding structure for a reverse flow flotation column according to any of claims 1 to 7 is used, wherein the flotation column body (5) is provided with a concentrate outlet (9) at the top and a tailings outlet (11) at the bottom and a bubble generator (12) in the lower part.

9. A reverse flow flotation column according to claim 8, further comprising:

the lifting stirrer comprises a stirring tank body (17) and a lifting impeller (19) arranged in the stirring tank body (17), and a slurry inlet and a slurry outlet are formed in the stirring tank body (17);

the liquid level detection device (14) is arranged on the flotation column body (5) and is used for sensing the liquid level in the flotation column body (5);

the controller (15) is used for receiving a feedback signal of the liquid level detection device (14) and controlling the rotating speed of the lifting impeller (19) according to the received feedback signal;

one end of the slurry discharge pipe (16) is communicated with a tailing outlet (11) at the bottom of the flotation column body (5), and the other end of the slurry discharge pipe is communicated with the slurry inlet;

the slurry entering from the slurry discharge pipe (16) is lifted to a set height by the lifting impeller (19) and then is discharged from the slurry outlet.

10. A reverse flow flotation column according to claim 9, wherein: be equipped with the medicament on arranging thick liquid pipe (16) and add the mouth, the grout outlet with be located the low reaches ore pulp feed pipe (6) intercommunication of flotation column cylinder (5) for stirring cell body (17) directly act as the low reaches ore pulp feed pond (21) of flotation column cylinder (5).