Multi-section feeding microbubble flotation column

Abstract

The utility model discloses a multi-section feeding microbubble flotation column which comprises an operation platform and a stirring column body. A first slurry discharging hole, a second slurry discharging hole, a pressurized air pipe, a microbubble generator, a stirring impeller, an annular foam groove, a concentrate pipeline, an annular flushing water pipe, a feeding port, a stirring motor, a belt pulley, a belt, a support, a stirring bearing, an aerosol dosing port, a tailing pipeline, an electric gate valve, a water spray nozzle, an annular gate and a lifting pull rod are included. The pressurized air pipe, the annular foam tank, the support and the tailing pipeline are fixed to the flotation column body in a welded mode, the concentrate pipeline and the annular flushing water pipe are welded to the annular foam tank, the stirring column body is fixed to the support, the feeding port is fixed to the stirring column body, and the stirring impeller and the aerosol adding port are fixed to the stirring bearing. And the microbubble generator and the pressurized air pipe are linked and fixed together. A flotation structure and a stirring device are assembled in a vertical combination manner, so that the time consumption of crop material conveying and the waste of energy during multi-machine operation are reduced, and the occupied area is reduced.

Description

Technical Field

[0001] The utility model relates to a new type of flotation equipment used in the mining beneficiation industry, in particular to a multi-stage feeding microbubble flotation column. Background Art

[0002] Compared with traditional flotation machines, flotation columns have the advantages of high separation efficiency, easy control, shortening the cleaning operation process, and improving the concentrate grade. Their application in the beneficiation industry and other industries abroad has achieved great success. In China, flotation columns are mainly used in the coal preparation industry, and their application in the beneficiation industry is still in its initial stage. Therefore, the application potential of flotation columns in the separation of metal and non-metal minerals is very large; because flotation columns have incomparable advantages over conventional flotation machines when dealing with extremely fine materials. For example, when treating fine coal slime with a particle size of <45um, the ash reduction rate reaches 84.187%, and the possibility of application in fields such as gas-liquid separation is also very large. With the continuous understanding of flotation columns, the domestic research efforts on them are also gradually escalating, and various types of flotation columns such as packed medium type, mechanical agitation type, downflow jet type, and microbubble type have been developed. However, the common drawback of most current flotation columns is that when generating small bubbles, a low apparent aeration rate and a relatively small throughput must be adopted, which makes the bubble generator prone to blockage, unstable operation, and affects production efficiency; at the same time, their separation effect on coarse-grained minerals is not good, and they are greatly affected by changes in pulp concentration. At the same time, the mixer also has problems such as uneven agitation of the pulp, insufficient agitation of the reagent, and easy agglomeration during the agitation process. Summary of the Utility Model

[0003] In order to solve the deficiencies existing in the production of the original flotation equipment, we assembled the flotation structure and the stirring device in a vertical combination manner, reducing the time-consuming and energy waste of material transfer during multi-machine operation, and reducing the floor area.

[0004] The technical solution provided by the utility model to solve the technical problem is as follows:

[0005] A multi-stage feeding microbubble flotation column, comprising an operation platform, a stirring column body, a first slurry discharge hole, a second slurry discharge hole, a pressurized air pipe, a microbubble generator, a stirring impeller, an annular foam trough, a concentrate pipeline, an annular flushing water water pipe, a feeding port, a stirring motor, a pulley, a belt, a bracket, a stirring bearing, an aerosol dosing port, a tailing pipeline, an electric gate valve, a water spray nozzle, an annular gate, a lifting pull rod;

[0006] The pressurized air pipe, annular foam trough, bracket, and tailings pipe are fixed to the flotation column body by welding. An electric gate valve is installed on the tailings pipe by flange connection to control the tailings discharge flow. The concentrate pipe and annular flushing water pipe are welded to the annular foam trough. The spray nozzle and the annular flushing water pipe are of an integrated structure. The stirring column body is fixed to the bracket by bolts. The feed inlet is fixed to the stirring column body by bolts. The stirring motor is fixed to the stirring column body by bolt fixation. The stirring bearing is fixed to the inside of the stirring column body by bolts. The slurry discharge hole 1 and the slurry discharge hole 2 are hole-shaped structures on the stirring column body. The stirring impeller and the aerosol dosing port are fixed to the stirring bearing by bolts. The microbubble generator and the pressurized air pipe are fixed together by screw threads;

[0007] The operation platform is fixed to the top of the flotation column body through platform supports. The annular gate is sleeved outside the stirring column body. The bottom end of the lifting pull rod is connected and fixed to the lifting lug welded on the annular gate. The screw rod part at the top of the lifting pull rod passes through the central hole of the threaded nut bearing seat and then screws into the nut. The threaded nut bearing seat is fixed to the operation platform by bolts.

[0008] The slurry discharge hole 1 and the slurry discharge hole 2 are hole-shaped structures evenly distributed in a ring on the stirring column body, with a diameter of 100 mm.

[0009] The annular flushing water pipe, spray nozzle, and annular gate are made of stainless steel.

[0010] The advantages of the present utility model are as follows: 1. Compared with the existing flotation column, we assemble the flotation structure and the stirring device in a vertical combination manner, reducing the time-consuming of material transfer during multi-machine operation and the waste of energy, and reducing the floor area; 2. During the bubble charging process, a porous medium is selected for large-area air inflation and small-area ore passing (tailings), increasing the contact between the material and the bubbles and improving the flotation efficiency; 3. In order to make the material and the medicament mix more fully, we choose three-dimensional stirring and aerosol dosing method. In the middle, we use the impeller for stirring, and then the medicament is ejected as aerosol through the electric holes on the stirring rod for rotational medicament addition; 4. To enhance the flotation efficiency, multi-stage ore discharge holes are used for feeding. After the pulp is fed and under the action of stirring, affected by the centrifugal force, the larger-particle materials are thrown to the wall of the stirring machine and discharged from the upper slurry discharge hole (slurry discharge hole 1), increasing the separation space for large particles, and the small particles are discharged from the lower slurry discharge hole (slurry discharge hole 2) to achieve three-dimensional separation. Description of the Drawings

[0011] Figure 1 It is a schematic structural diagram of the present utility model;

[0012] Figure 2 It is a partial schematic diagram of the present utility model;

[0013] 1. Flotation column body; 2. Stirring column body; 3. First slurry discharge hole; 4. Second slurry discharge hole; 5. Pressurized air pipe; 6. Microbubble generator; 7. Stirring impeller; 8. Annular foam trough; 9. Concentrate pipeline; 10. Annular flushing water pipe; 11. Feed inlet; 12. Stirring motor; 13. Pulley; 14. Belt; 15. Support; 16. Stirring bearing; 17. Aerosol dosing port; 18. Tailings pipeline; 19. Spray nozzle; 20. Electric sluice valve; 21. Annular gate; 22. Lifting pull rod; 23. Operating platform; 24. Lifting lug; 25. Threaded nut bearing seat; 26. Nut; 27. Platform support pillar. Detailed implementation manner

[0014] A multi-stage feeding microbubble flotation column includes a flotation column body 1, a stirring column body 2, a first slurry discharge hole 3, a second slurry discharge hole 4, a pressurized air pipe 5, a microbubble generator 6, a stirring impeller 7, an annular foam trough 8, a concentrate pipeline 9, an annular flushing water pipe 10, a feed inlet 11, a stirring motor 12, a pulley 13, a belt 14, a support 15, a stirring bearing 16, an aerosol dosing port 17, a tailings pipeline 18, a spray nozzle 19, an electric sluice valve 20, a stainless steel annular gate 21, a lifting pull rod 22, and an operating platform 23, an annular gate 21, and a lifting pull rod 22;

[0015] The pressurized air pipe 4, the annular foam trough 8, the support 15, and the tailings pipeline 18 are fixed on the flotation column body 1 by welding. The concentrate pipeline 9 and the annular flushing water pipe 10 are welded on the annular foam trough 8. The spray nozzle 19 and the annular flushing water pipe 10 are of an integral structure. The stirring column body 2 is fixed on the support 15 by bolts. The feed inlet 11 is fixed on the stirring column body 2 by bolts. The stirring motor 12 is fixed on the stirring column body 2 by bolting. The stirring bearing 16 is fixed in the stirring column body 2 by bolts. The first slurry discharge hole 3 and the second slurry discharge hole 4 are hole-shaped structures on the stirring column body 2. The stirring impeller 7 and the aerosol dosing port 17 are fixed on the stirring bearing 16 by bolts. The electric sluice valve 20 is flange-connected to the tailings pipeline 18. The microbubble generator 6 and the pressurized air pipe 5 are fixedly connected together by screw threads.

[0016] The operating platform 23 is fixed on the top of the flotation column body 1 and the outer side of the top of the stirring column body 2 by welding through the platform support 27. The annular gate 21 is sleeved on the outer side of the stirring column body 2. The bottom end of the lifting pull rod 22 is connected and fixed to the lifting lug 24 welded on the annular gate 21 by bolts. The screw rod part at the top end of the lifting pull rod 22 passes through the central hole of the threaded nut bearing seat 25 and then is screwed into the nut 26 to achieve the function of fixing and lifting the annular gate 21, wherein the threaded nut bearing seat 25 is fixed on the operating platform 23 by bolts.

[0017] An electric gate valve is installed on the tailings pipeline in a flange connection mode to control the tailings discharge flow rate, so as to more efficiently control the reagent reaction and flotation time of this equipment.

[0018] The annular flushing water pipe 10, the spray nozzle 19, and the annular gate 21 are made of stainless steel to achieve good anti-corrosion and wear-resistant effects.

[0019] Specific flotation process: The stirring column body 2 is fixed on the flotation column body 1 through the bracket 15. After the minerals to be separated are crushed and ground to make the pulp reach the suitable particle size and concentration for separation, the pulp enters the stirring column body 2 through the feed port 11. The stirring motor 12 drives the stirring bearing 16 to rotate at high speed through the pulley 13 and the belt 14, so that the stirring impeller 7 fixed on the stirring bearing 16 rotates at high speed, making the pulp fed into the stirring column body form a large centrifugal force. Under the action of the centrifugal force, the pulp with larger particle size is thrown to the wall of the stirring column body and discharged from the upper discharge hole 3, increasing the separation space for large-particle minerals. The small particles are discharged from the lower discharge hole 4. We design an annular gate 21 outside the stirring column body 2. By pulling the lifting pull rod 22 up and down on the operation platform 23, the annular gate 21 is controlled to move up and down outside the stirring column body 2 to control the opening and closing sizes of the upper discharge hole 3 and the lower discharge hole 4 to control the real-time flow rate and achieve precise three-dimensional separation.

[0020] Air is fed into the microbubble generator 6 through the pressurized air pipe 5 to generate dense tiny bubbles, realizing large-area aeration and small-area ore passing (tailings), increasing the contact area between the material and the bubbles, and increasing the flotation efficiency.

[0021] In order to make the material and the reagent mix more fully, we choose the three-dimensional stirring and aerosol dosing methods. In the middle, we use the impeller for stirring, and then the reagent forms an aerosol and is added in a rotating manner through the aerosol dosing port 17 fixed on the stirring bearing 16.

[0022] Hydrophobic minerals adhere to the bubbles and flow into the annular foam trough 8. At this time, the annular flushing water pipe 10 in the annular foam trough 8 forms a flushing water with a large pressure and sprays out from the spray nozzle 19, causing the foam to break and form concentrate pulp. The concentrate pulp flows into the concentrate pipeline 9 for the next separation or processing. The tailings are discharged through the tailings pipeline 18 for the next treatment.

Claims

1. A multi-stage feeding microbubble flotation column, characterized in that: It comprises an operating platform (23), a flotation column body (1), a stirring column body (2), a slurry discharge hole 1 (3), a slurry discharge hole 2 (4), a pressurized air pipe (5), a microbubble generator (6), a stirring impeller (7), an annular foam tank (8), a concentrate pipeline (9), an annular flushing water pipe (10), a feed inlet (11), a stirring motor (12), a pulley (13), a belt (14), a bracket (15), a stirring bearing (16), an aerosol dosing port (17), a tailings pipeline (18), a water spray nozzle (19), an annular gate plate (21), and a lifting rod (22); The pressurized air pipe (5), the annular foam tank (8), the bracket (15), and the tailings pipe (18) are fixed to the flotation column body (1) by welding; the concentrate pipe (9) and the annular flushing water pipe (10) are welded to the annular foam tank (8); the water nozzle (19) and the annular flushing water pipe (10) are an integrated structure; the stirring column body (2) is fixed to the bracket (15) by bolts; the feed port (11) is fixed to the stirring column body (2) by bolts; the stirring motor (12) is fixed to the stirring column body (2) by bolts; the stirring bearing (16) is fixed to the stirring column body (2) by bolts; the slurry discharge hole 1 (3) and the slurry discharge hole 2 (4) are hole-shaped structures on the stirring column body; the stirring impeller (7) and the aerosol dosing port (17) are fixed to the stirring bearing (16) by bolts; the microbubble generator (6) and the pressurized air pipe (5) are connected and fixed together by screw buckles; The operating platform (23) is fixed to the top of the flotation column body through the platform support, the annular gate plate (21) is sleeved on the outside of the stirring column body, the bottom end of the lifting rod (22) is connected and fixed to the ear (24) welded on the annular gate plate, the screw rod part at the top of the lifting rod passes through the center hole of the threaded nut bearing seat (25) and is screwed into the nut (26), and the threaded nut bearing seat is fixed to the operating platform by bolts.

2. A multi-stage feeding microbubble flotation column according to claim 1, characterized in that: The slurry discharge hole 1 and the slurry discharge hole 2 are annular hole structures evenly distributed on the column body of the stirring column, with a diameter of 100 mm.

3. The multi-stage feeding microbubble flotation column according to claim 1, characterized in that: The annular flushing water pipe, the water spray nozzle and the annular gate are made of stainless steel.

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