Micro-bubble flotation grading device

Abstract

The invention relates to the technical field of microbubble flotation, and discloses a microbubble flotation grading device which comprises a flotation column body and further comprises a foam collecting tank fixedly connected to the outer portion of the flotation column body, a foam discharging tank fixedly communicated to the outer portion of the foam collecting tank and a screening mechanism, and the bottom of the foam collecting tank is inclined. The screening mechanism comprises a main box body arranged on the ground surface, a screening bin is arranged in the main box body, a spraying piece is arranged above the screening bin, and the end, away from the foam discharging groove, of the screening bin fixedly communicates with a discharging hopper. The vibration exciter is used for driving the screening bin to vibrate at high frequency, so that foams entering the screening bin can sequentially pass through a foam breaking area, a desliming area and a dewatering area, and high-pressure spraying of a spraying pipe is matched, so that the foams can be sheared and crushed through sieve holes in an inclined sieve plate at the bottom of the screening bin and can be impacted and crushed through high-pressure spraying water; and desliming and dewatering are carried out while foam breaking is carried out, so that the treatment burden of subsequent treatment equipment is relieved.

Description

Technical Field

[0001] This invention relates to the field of microbubble flotation technology, and more specifically, to a microbubble flotation classification device. Background Technology

[0002] Microbubble flotation classifiers are important ore separation equipment that utilizes tiny bubbles to combine with ore particles in the slurry to achieve flotation separation of ores. In a microbubble flotation classifier, the slurry mixed with reagents is agitated and aerated, causing target mineral particles to selectively adhere to the bubbles and float to the surface of the slurry, where they are scraped off to form a froth product. The remaining material is retained in the slurry, thus achieving the purpose of mineral separation.

[0003] Existing microbubble flotation classifiers mainly include trough flotation machines and flotation columns. Flotation columns extend the interaction time between the pulp and microbubbles through "countercurrent contact," enabling more precise separation of fine-grained minerals and reducing interference from fine slime. A flotation column mainly includes a column body, an aeration mechanism, a feeding mechanism, a froth collection mechanism, and a tailings discharge mechanism. The froth collection mechanism includes a froth collection tank and spray water pipes. Mineralized bubbles rise to the top of the column to form a froth layer. The spray water pipes wash the froth layer, removing high-ash particles and other impurities carried in the froth, improving concentrate purity. The froth is then collected in the froth collection tank and discharged.

[0004] The core component of the foam product entering the foam collection tank is mineralized air bubbles that encapsulate concentrate particles. It also carries a large amount of water and a small amount of unwashed high-ash fine mud. If it is discharged directly from the foam collection tank without treatment, the water and high-ash fine mud will increase the processing burden on subsequent processing equipment. In particular, the high-ash fine mud with strong adhesion is very likely to cause blockage and wear on the core components of the equipment through a chain reaction of adhesion-accumulation-solidification, leading to the failure of the core components. Summary of the Invention

[0005] This invention provides a microbubble flotation and grading device, which solves the technical problem in related technologies where foam products are discharged directly from the foam collection tank without treatment, and the moisture and high-ash fine mud in the foam increase the burden of subsequent processing.

[0006] This invention provides a microbubble flotation classification device, comprising a flotation column body, and further comprising:

[0007] A foam collection tank is fixedly connected to the outside of the flotation column body, and the bottom of the foam collection tank is inclined.

[0008] The foam discharge trough is fixedly connected to the outside of the foam collection trough and is located at the lowest point near the bottom of the foam collection trough;

[0009] A screening mechanism is provided below the foam discharge trough. The screening mechanism includes a main box body provided on the ground surface. Inside the main box body is a screening chamber located below the foam discharge trough. A spraying device is provided above the screening chamber. The end of the screening chamber away from the foam discharge trough is fixedly connected to a discharge hopper extending to the outside of the main box body.

[0010] Preferably, the main housing and the screening chamber are connected by a spring assembly, and vibrators for driving the screening chamber to vibrate are symmetrically installed on the outside of the main housing.

[0011] Preferably, the bottom plate of the screening chamber is an inclined screen plate, and the internal space of the screening chamber is divided into a bubble-breaking area, a mud-removing area, and a dewatering area.

[0012] Preferably, the spraying component includes a water tank A installed on the ground surface, a water pump installed on the top of the water tank A, a main pipe fixedly connected to the outlet of the water pump, and two sets of spray pipes fixedly connected to the outside of the main pipe, the two sets of spray pipes being evenly distributed above the bubble breaking area and the sludge removal area respectively.

[0013] Preferably, the bottom plate of the main housing is an inclined bottom plate, the lower part of the inclined bottom plate is far away from the hopper, and a filter element is provided at the end of the main housing away from the hopper.

[0014] Preferably, the filter element includes an opening that is embedded in the outside of the main housing, with side sealing plates fixedly connected to both sides of the opening, a filter cylinder disposed between the two side sealing plates, a water tank B disposed below the filter cylinder, and a return water pipe connecting the water tank B and the water tank A.

[0015] Preferably, the filter cartridge is rotatably connected between the two side sealing plates, the bottom of the filter cartridge is in contact with the opening, and there is a gap between the filter cartridge and the top of the opening. A motor is installed on the outside of one of the side sealing plates, and the output end of the motor is fixedly connected to a rotating shaft A that passes through the other side sealing plate. The middle part of the rotating shaft A is fixedly connected to the filter cartridge through a connecting frame.

[0016] Preferably, a scraper blade that fits into the filter cartridge is fixedly connected to the outside of the water tank B, and a lower sludge hopper is fixedly connected to the outside of the scraper blade.

[0017] Preferably, a rotating shaft B is rotatably connected inside the foam discharge trough, and a material distribution plate is fixedly connected at equal intervals to the outside of the rotating shaft B. The end of the rotating shaft B extends to the outside of the foam discharge trough, and a belt drive component is symmetrically arranged between the rotating shaft B and the rotating shaft A.

[0018] Preferably, the belt drive component includes two pulleys fixedly connected to the ends of the rotating shaft B and the rotating shaft A, respectively, and a drive belt is provided between the two pulleys.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. This invention employs a combination of screening chamber and spraying components. The vibrator drives the screening chamber to vibrate at high frequency, allowing the foam entering the screening chamber to pass sequentially through the foam breaking zone, the sludge removal zone, and the dewatering zone. Combined with the high-pressure spraying from the spray pipe, the foam is sheared and broken through the screen holes on the inclined screen plate at the bottom of the screening chamber, and impacted and broken by the high-pressure spray water. Foam breaking and sludge removal and dewatering are carried out simultaneously, reducing the processing burden on subsequent processing equipment.

[0021] 2. This invention uses a combination of filter cartridges and return water pipes to filter out fine mud from the water discharged from the main tank. This allows water in tank B to enter the interior of tank A through the return water pipe for spraying by the spray pipe, thus constructing a water circulation link for filtration and reuse. This reduces the consumption of fresh water and prevents fine mud from flowing back with the water and affecting the sludge removal effect.

[0022] 3. This invention employs a combination of filter cartridge and scraper. The motor drives the filter cartridge to rotate outward, causing the side of the filter cartridge with adhering fine mud to rotate to the outside of the main housing and be scraped off by the scraper. The clean side of the filter cartridge rotates to the inside of the main housing to intercept the fine mud, thereby achieving continuous self-cleaning of the filter cartridge and continuous interception of fine mud.

[0023] 4. In the process of continuous self-cleaning and continuous interception of fine mud by rotating the filter cartridge, the present invention can drive the distribution plate to rotate through the belt drive component. The rotation of the distribution plate can evenly distribute the foam inside the foam discharge tank to the screening chamber, so as to avoid overloading or uneven feeding of the screening chamber and affecting the subsequent screening work. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 for Figure 1 A top-view structural diagram;

[0026] Figure 3 This is a schematic diagram of the overall structure of the screening mechanism in this invention;

[0027] Figure 4 This is a schematic diagram of the spray component in this invention;

[0028] Figure 5 This is a schematic diagram of the main box and screening chamber in this invention;

[0029] Figure 6 This is a schematic diagram of the filter element in this invention.

[0030] In the diagram: 100, flotation column body; 200, foam collection tank; 300, foam discharge tank; 400, screening mechanism; 410, main box; 420, screening chamber; 421, defoaming zone; 422, desliming zone; 423, dewatering zone; 430, spray component; 431, water tank A; 432, water pump; 433, main pipeline; 434, spray pipe; 440, hopper; 450, spring assembly; 460, vibrator; 470, filter component; 471, filter cartridge; 472, water tank B; 473, return water pipe; 474, motor; 475, shaft A; 476, connecting frame; 477, scraper; 478, sludge hopper; 500, shaft B; 600, distribution plate; 700, belt drive component. Detailed Implementation

[0031] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, some features described in the examples may be combined in other examples.

[0032] like Figure 1 - Figure 2 As shown, this embodiment provides a microbubble flotation classification device, including a flotation column body 100. The flotation column body 100 adopts existing technology. The specific structure and connection method of the flotation column body 100 are not described in detail in this embodiment. It also includes:

[0033] The foam collection tank 200 is fixedly connected to the outside of the flotation column body 100. The bottom of the foam collection tank 200 is inclined, and the foam layer formed on the upper part of the flotation column body 100 can enter the interior of the foam collection tank 200.

[0034] Foam discharge trough 300 is fixedly connected to the outside of foam collection trough 200 and is located at the lowest point near the bottom of foam collection trough 200. Foam layer inside foam collection trough 200 can enter foam discharge trough 300.

[0035] The screening mechanism 400 is located below the foam discharge tank 300, as detailed below. Figure 3As shown, the screening mechanism 400 includes a main box 410 set on the ground surface. Inside the main box 410, there is a screening chamber 420 located below the foam discharge trough 300. A spray element 430 is set above the screening chamber 420. The high-pressure spray water output by the spray element 430 directly impacts the foam layer, which will produce three key effects: first, the impact force directly breaks the foam; second, the water flow will dilute the surfactant in the foam, weaken the stability of the liquid film, and make the foam easier to break; and third, it washes off the high-ash fine mud adhering to the foam. The end of the screening chamber 420 away from the foam discharge trough 300 is fixedly connected to a hopper 440 extending to the outside of the main box 410. The concentrate particles screened on the screening chamber 420 can be discharged through the hopper 440.

[0036] The main housing 410 and the screening chamber 420 are connected by a spring assembly 450. The main housing 410 is symmetrically equipped with vibrators 460 for driving the screening chamber 420 to vibrate. The vibrator 460 consists of a motor and an eccentric block as in the prior art. The output end of the motor is connected to the eccentric block through a coupling. In conjunction with the drive frames on both sides of the screening chamber 420, when the motor starts and drives the eccentric block to rotate, the eccentric block can rotate inside the drive frame to drive the screening chamber 420 to vibrate and screen.

[0037] Among them, specifically such as Figure 5 As shown, the bottom plate of the screening chamber 420 is an inclined screen plate. The internal space of the screening chamber 420 is divided into a bubble breaking area 421, a mud removal area 422 and a dewatering area 423. During the process of vibrating and screening the foam layer, the edge of the screen hole on the inclined screen plate at the bottom of the screening chamber 420 will generate a shearing force on the foam, tearing the liquid film of the bubbles. The high-speed movement of the screening chamber 420 will further enhance this shearing effect and accelerate the foam rupture.

[0038] Among them, specifically such as Figure 4 As shown, the spray unit 430 includes a water tank A431 installed on the ground surface. A water pump 432 is installed on the top of the water tank A431. The outlet of the water pump 432 is fixedly connected to a main pipe 433. Two sets of spray pipes 434 are fixedly connected to the outside of the main pipe 433. By starting the water pump 432, the water inside the water tank A431 can enter the two sets of spray pipes 434 through the main pipe 433, causing the two sets of spray pipes 434 to spray high-pressure spray water. The two sets of spray pipes 434 are evenly distributed above the foam breaking area 421 and the sludge removal area 422, respectively. The foam entering the screening chamber 420 can pass through the foam breaking area 421, the sludge removal area 422 and the dewatering area 423 in sequence. With the high-pressure spray of the spray pipes 434 and the high-frequency vibration of the screening chamber 420, the foam is broken, sludge removed and dewatered.

[0039] With the above structure, the foam entering the screening chamber 420 can pass through the foam breaking zone 421, the desliming zone 422 and the dewatering zone 423 in sequence. With the high-pressure spraying of the spray pipe 434, the foam can be sheared and crushed through the screen holes on the inclined screen plate at the bottom of the screening chamber 420 and impacted and crushed by the high-pressure spray water. Desliming and dewatering are carried out at the same time as foam breaking to reduce the processing burden of subsequent processing equipment.

[0040] In addition, the bottom plate of the main box 410 is an inclined bottom plate, and the lower part of the inclined bottom plate is far away from the feed hopper 440. The water and mud screened by the screening chamber 420 enter the interior of the main box 410. A filter element 470 is provided at the end of the main box 410 that is far away from the feed hopper 440.

[0041] Among them, specifically such as Figure 6 As shown, the filter element 470 includes an opening that is fixed to the outside of the main housing 410. Side sealing plates are fixedly connected to both sides of the opening. A filter cylinder 471 is arranged between the two side sealing plates. The filter cylinder 471 is used to filter fine mud. A water tank B472 is arranged below the filter cylinder 471. A return water pipe 473 is connected between the water tank B472 and the water tank A431. After the water inside the main housing 410 is filtered by the filter cylinder 471 to filter the fine mud, it enters the interior of the water tank A431 through the return water pipe 473 for spraying by the spray pipe 434.

[0042] The above structure allows water entering water tank B472 to pass through filter cartridge 471 to remove fine mud, and then enter the interior of water tank A431 through return pipe 473 for spraying by spray pipe 434, reducing the consumption of fresh water.

[0043] Additionally, the filter cartridge 471 is rotatably connected between the two side sealing plates. The filter cartridge 471 fits against the bottom of the opening, while there is a gap between the filter cartridge 471 and the top of the opening. A motor 474 is mounted on the outside of one side sealing plate. The output end of the motor 474 is fixedly connected to a rotating shaft A475 that passes through the other side sealing plate. The middle of the rotating shaft A475 is fixedly connected to the filter cartridge 471 via a connecting bracket 476. By starting the motor 474 to drive the rotating shaft A475 to rotate, the filter cartridge 471 can be rotated outwards. B472 is externally fixedly connected to a scraper 477 that fits against the filter cartridge 471. The scraper 477 is externally fixedly connected to a lower sludge hopper 478. The side of the filter cartridge 471 located inside the main housing 410 is covered with fine sludge, while the side located outside the main housing 410 is clean. When the filter cartridge 471 rotates outward, the side covered with fine sludge will rotate to the outside of the main housing 410 and be scraped off by the scraper 477. The clean side will rotate to the inside of the main housing 410 to intercept the fine sludge.

[0044] The above structure enables the filter cartridge 471 to achieve continuous self-cleaning and continuous interception of fine mud during rotation.

[0045] In addition, a rotating shaft B500 is rotatably connected inside the foam discharge tank 300, and a distribution plate 600 is fixedly connected at equal intervals outside the rotating shaft B500. The end of the rotating shaft B500 extends to the outside of the foam discharge tank 300. A belt drive component 700 is symmetrically arranged between the rotating shaft B500 and the rotating shaft A375. When the rotating shaft B500 drives the distribution plate 600 to rotate at a continuous and controllable speed through the belt drive component 700, the foam inside the foam discharge tank 300 can be evenly distributed into the screening chamber 420.

[0046] Among them, specifically such as Figure 3 As shown, the belt drive component 700 includes two pulleys that are fixedly connected to the ends of the rotating shaft B500 and the rotating shaft A475 respectively. A drive belt is provided between the two pulleys. That is, in the process of continuous self-cleaning and continuous interception of fine mud by rotating the filter cartridge 471, the distribution plate 600 can be driven to rotate by the belt drive component 700 to distribute materials.

[0047] The above structure allows the distribution plate 600 to rotate and evenly distribute the foam inside the foam discharge trough 300 into the screening chamber 420, so as to prevent the screening chamber 420 from being overloaded or unevenly fed, which would affect the subsequent screening work.

[0048] The specific working principle of this implementation is as follows: First, ensure that the flotation column body 100 is working normally, and then start the various electrical components in the device. Specifically, start the vibrator 460 to drive the screening chamber 420 to vibrate at high frequency, start the water pump 432 to make the water in the water tank A431 enter the two sets of spray pipes 434 through the main pipe 433, so that the two sets of spray pipes 434 can spray high-pressure spray water into the defoaming area 421 and the desliming area 422, start the motor 474 to make the rotating shaft A475 rotate, and the rotation of the rotating shaft A475 drives the filter cartridge 471 to rotate outward through the connecting frame 476. At the same time, the rotating shaft B500 drives the rotating shaft B500 to rotate through the belt drive component 700, and the rotating shaft B500 drives the distribution plate 600 to rotate, so that the distribution plate 600 rotates towards the inside of the foam discharge tank 300.

[0049] During operation, the foam layer formed on the upper part of the flotation column body 100 enters the foam collection tank 200 and the foam discharge tank 300 in sequence. The foam inside the foam discharge tank 300 is evenly discharged through the distribution plate 600, so that the foam is evenly distributed into the screening chamber 420. Under the action of the high-frequency vibration of the screening chamber 420, the foam entering the screening chamber 420 will generate shear force on the edge of the screen hole on the inclined screen plate at the bottom of the screening chamber 420, tearing the liquid film of the bubbles and screening out water and mud.

[0050] Simultaneously, two sets of spray pipes 434 output high-pressure spray water to directly impact the foam breaking zone 421 and the desliming zone 422. This causes the foam entering the foam breaking zone 421 to be broken by the high-pressure spray water, and the water flow dilutes the surfactant in the foam, weakening the stability of the liquid film and making the foam easier to break. As a result, most of the foam entering the desliming zone 422 is broken. The broken foam concentrate particles and high-ash fine mud are then washed by high-pressure spray water to remove the high-ash fine mud adhering to the foam. Subsequently, the concentrate particles after removing the high-ash fine mud enter the dewatering zone 423 for dewatering. Finally, the dewatered concentrate particles are discharged through the discharge hopper 440. During this process, the high-frequency vibration of the screening chamber 420, combined with the high-pressure spray from the spray pipes 434, allows the foam to be sheared and broken through the screen holes on the inclined screen plate at the bottom of the screening chamber 420 and impacted and broken by the high-pressure spray water. Desliming and dewatering are carried out at the same time as foam breaking to reduce the processing burden on subsequent processing equipment.

[0051] During the above process, the water and mud screened by the screening chamber 420 enter the interior of the main tank 410. The water inside the main tank 410 is filtered by the filter cartridge 471 to remove fine mud, and then enters the interior of the water tank B472. The water inside the water tank B472 then enters the interior of the water tank A431 through the return water pipe 473. During this process, the water entering the water tank B472 can be filtered by the filter cartridge 471 to remove fine mud, and then enters the interior of the water tank A431 for spraying by the spray pipe 434, thereby reducing the consumption of fresh water.

[0052] During the above operation, since the side of the filter cartridge 471 located inside the main housing 410 is covered with fine mud, while the side located outside the main housing 410 is clean, when the filter cartridge 471 rotates outward, the side covered with fine mud will rotate to the outside of the main housing 410 and be scraped off by the mud scraper 477. The fine mud will then be discharged through the mud hopper 478, and the clean side will rotate to the inside of the main housing 410 to intercept the fine mud. During this operation, the filter cartridge 471 can achieve continuous self-cleaning and continuous interception of fine mud.

[0053] The embodiments of the present invention have been described above, but the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments described above, all of which are within the protection scope of the embodiments described above.

Claims

1. A microbubble flotation classification device, comprising a flotation column body (100), characterized in that, Also includes: A foam collection tank (200) is fixedly connected to the outside of the flotation column body (100), and the bottom of the foam collection tank (200) is inclined. Foam discharge channel (300) is fixedly connected to the outside of the foam collection channel (200) and located at the lowest point near the bottom of the foam collection channel (200); A screening mechanism (400) is disposed below the foam discharge trough (300). The screening mechanism (400) includes a main box (410) disposed on the ground surface. Inside the main box (410) is a screening chamber (420) located below the foam discharge trough (300). A spray element (430) is disposed above the screening chamber (420). The end of the screening chamber (420) away from the foam discharge trough (300) is fixedly connected to a discharge hopper (440) extending to the outside of the main box (410).

2. The microbubble flotation classification device according to claim 1, characterized in that, The main housing (410) and the screening chamber (420) are connected by a spring assembly (450). The main housing (410) is symmetrically equipped with vibrators (460) for driving the screening chamber (420) to vibrate.

3. The microbubble flotation and classification device according to claim 2, characterized in that, The bottom plate of the screening chamber (420) is an inclined screen plate, and the internal space of the screening chamber (420) is divided into a bubble breaking area (421), a mud removal area (422), and a dewatering area (423).

4. The microbubble flotation and classification device according to claim 3, characterized in that, The spray unit (430) includes a water tank A (431) set on the ground surface. A water pump (432) is installed on the top of the water tank A (431). The outlet of the water pump (432) is fixedly connected to a main pipe (433). Two sets of spray pipes (434) are fixedly connected to the outside of the main pipe (433). The two sets of spray pipes (434) are evenly distributed above the bubble breaking area (421) and the sludge removal area (422).

5. A microbubble flotation and classification device according to claim 4, characterized in that, The bottom plate of the main box (410) is an inclined bottom plate, and the lower part of the inclined bottom plate is far away from the feed hopper (440). A filter element (470) is provided at the end of the main box (410) away from the feed hopper (440).

6. A microbubble flotation and classification device according to claim 5, characterized in that, The filter element (470) includes an opening that is fixed to the outside of the main housing (410). Side sealing plates are fixedly connected to both sides of the opening. A filter cylinder (471) is provided between the two side sealing plates. A water tank B (472) is provided below the filter cylinder (471). A return water pipe (473) is connected between the water tank B (472) and the water tank A (431).

7. A microbubble flotation and classification device according to claim 6, characterized in that, The filter cartridge (471) is rotatably connected between the two side sealing plates. The filter cartridge (471) is in contact with the bottom of the opening. There is a gap between the filter cartridge (471) and the top of the opening. A motor (474) is installed on the outside of one of the side sealing plates. The output end of the motor (474) is fixedly connected to a rotating shaft A (475) that passes through the other side sealing plate. The middle part of the rotating shaft A (475) is fixedly connected to the filter cartridge (471) through a connecting bracket (476).

8. A microbubble flotation and classification device according to claim 7, characterized in that, The water tank B (472) is fixedly connected to a scraper (477) that fits against the filter cylinder (471), and the scraper (477) is fixedly connected to a lower mud hopper (478).

9. A microbubble flotation and classification device according to claim 8, characterized in that, The foam discharge trough (300) is rotatably connected to a rotating shaft B (500), and a material distribution plate (600) is fixedly connected to the outside of the rotating shaft B (500) at equal intervals. The end of the rotating shaft B (500) extends to the outside of the foam discharge trough (300), and a belt drive component (700) is symmetrically arranged between the rotating shaft B (500) and the rotating shaft A (375).

10. A microbubble flotation and classification device according to claim 9, characterized in that, The belt drive component (700) includes two pulleys that are fixedly connected to the ends of shaft B (500) and shaft A (475) respectively, and a drive belt is provided between the two pulleys.

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