Device for efficient desilication of fine-grained bauxite by flotation

Abstract

The utility model discloses a fine particle bauxite high -efficient flotation desilication device, specifically relates to mineral processing engineering technical field, including pressurized solution tank mechanism, the pressurized solution tank mechanism includes the solution tank body, the top fixedly connected with the clear water mouth of solution tank body, the left side fixedly connected with the pressurized mouth of solution tank body, the right side fixedly connected with the exhaust pipe of solution tank body. The utility model discloses a fine particle bauxite high -efficient flotation desilication device, by setting up having the steady flow mechanism of staggered distribution steady flow board, make the slurry and micro - nanometer bubble in the ascending process along zigzag path movement, greatly extended the contact time and the collision probability of bubble and fine particle mineral, effectively enhanced the adhesion stability of fine particle aluminum mineral and bubble, at the same time, the introduction of micro - nanometer bubble solved the problem that fine particle mineral is easy to lose, difficult to capture in traditional flotation, improved the flotation recovery rate and concentrate grade of aluminum mineral.

Description

Technical Field

[0001] This utility model relates to the field of mineral processing engineering technology, and in particular to a high-efficiency flotation desilication device for fine-grained bauxite. Background Technology

[0002] Bauxite is an important source of aluminum resources, and its efficient beneficiation and desilication are crucial for improving the economic benefits of aluminum smelting. However, with the increasing depletion of easily beneficiated bauxite resources, refractory bauxite resources with fine-grained dispersive particles and low grades are gradually becoming the main development targets. These ores contain fine-grained valuable minerals, often exhibiting high mud formation and easy mud formation. Traditional flotation processes present the following problems: First, the small size and large specific surface area of ​​fine-grained minerals make them easily lost with the water flow during flotation, hindering effective collection. Second, the low probability of collision between fine-grained minerals and conventionally sized bubbles makes adhesion difficult, leading to a significant decrease in flotation recovery. Third, the complex surface properties of fine-grained minerals make them prone to non-selective agglomeration, affecting flotation selectivity and reducing concentrate grade. To address these issues, the flotation process of fine-grained minerals can be enhanced using micro- and nano-bubbles. Micro- and nano-bubbles, with their small size, large specific surface area, slow rising speed, and negatively charged surface, can effectively enhance the collision probability and adhesion stability with fine-grained minerals, thereby improving flotation efficiency. The existing technology has the following problems:

[0003] Existing micro-nano bubble generators often suffer from problems such as wide bubble size distribution, poor stability, high energy consumption, and unclear synergistic effects with flotation reagents, making it difficult to achieve efficient and stable desilication of fine-grained bauxite on an industrial scale. Utility Model Content

[0004] The main purpose of this invention is to provide a high-efficiency flotation desilication device for fine-grained bauxite, which can effectively solve the problems of wide bubble size distribution, poor stability, high energy consumption, and difficulty in achieving efficient and stable desilication of fine-grained bauxite on an industrial scale in existing micro-nano bubble flotation technologies.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A high-efficiency flotation desilication device for fine-grained bauxite includes a pressurized dissolved air tank mechanism. The pressurized dissolved air tank mechanism includes a dissolved air tank body. A clear water inlet is fixedly connected to the top of the dissolved air tank body. A pressurization port is fixedly connected to the left side of the dissolved air tank body. An exhaust pipe is fixedly connected to the right side of the dissolved air tank body. A venting valve is installed on the outer wall of the exhaust pipe. A flotation separation mechanism is installed on the right side of the pressurized dissolved air tank mechanism. A scraping mechanism is installed above the flotation separation mechanism. A collection mechanism is installed on the right side of the flotation separation mechanism. The flotation separation mechanism includes a flotation box. The flotation box has a pipeline chamber located at the bottom of the inner cavity of the flotation box. Several branch pipes are evenly arranged inside the pipeline chamber. The exhaust pipe, with one end away from the dissolved gas tank body, penetrates into the inner cavity of the pipeline chamber and is fixedly connected to several branch pipes for conveying micro-nano bubbles. Several connecting pipes penetrating into the inner cavity of the flotation tank are uniformly fixedly connected to the bottom of the branch pipes, and annular air outlet pipes are fixedly connected to the top of each connecting pipe. Several bubble nozzles are fixedly connected to the top of the annular air outlet pipes in annular array. A flow stabilizing mechanism is provided in the inner cavity of the flotation tank. A slurry pump body is provided on the right side of the flotation tank. A slurry conveying pipe is fixedly connected to the output end of the slurry pump body. The other end of the slurry conveying pipe penetrates into the chamber between the flow stabilizing mechanism and several annular air outlet pipes. A slurry mixing tank is connected to the input end of the slurry pump body.

[0007] Preferably, the flow stabilizing mechanism includes a flow stabilizing column, which is fixedly installed on the inner wall of the flotation tank and its four sides are respectively fixedly connected to the four sides of the inner wall of the flotation tank. The rectangular array of the flow stabilizing column has several vertical flow stabilizing channels that run vertically through it, and the several vertical flow stabilizing channels are respectively located above several annular air outlet pipes.

[0008] Preferably, several flow stabilizing plates are fixedly installed on both sides of the inner wall of several vertical flow stabilizing channels, and the flow stabilizing plates on both sides are inclined and connected to each other to allow the rising bubbles to float in a zigzag pattern.

[0009] Preferably, the inner cavity of the mixing tank is equipped with a stirrer for uniformly mixing the raw ore with water and flotation reagents.

[0010] Preferably, the scraping mechanism includes a vertical plate, which is fixedly installed on the top front side of the flotation tank. A servo motor is fixedly installed on the right front end of the vertical plate. The output shaft of the servo motor passes through to the rear side of the vertical plate and is fixedly installed with a drive sprocket. A driven sprocket is movably installed on the left rear end of the vertical plate. A chain is drivingly connected to the outer wall of the drive sprocket and the driven sprocket. A movable crossbar is rotatably installed on the side of the chain away from the vertical plate. A rubber scraper is fixedly installed at the bottom of the movable crossbar, and the front and rear sides of the rubber scraper are respectively in contact with the front and rear sides of the inner wall of the flotation tank.

[0011] Preferably, a collection box is fixedly installed on the upper right side of the flotation box, and a discharge channel is opened on the top right side of the flotation box, which runs through its own inner cavity and the inner cavity of the collection box. The height of the flow stabilizing column is lower than that of the discharge channel. The liquid level of the slurry in the inner cavity of the flotation box is flush with the bottom of the inner side of the discharge channel. A discharge pipe is fixedly connected to the bottom right side of the collection box for discharging the foam product containing aluminum minerals scraped off by the rubber scraper.

[0012] Preferably, the collecting mechanism includes a collection box, which is fixedly installed on the lower right side of the flotation tank and below the discharge pipe. Four support legs are fixedly installed in a rectangular array at the bottom of the collection box. A limiting frame is fixedly installed on the inner side wall of the collection box. A collection frame is snapped into the inner ring of the limiting frame. A screen plate for screening foam products is fixedly installed at the bottom of the inner ring of the collection frame.

[0013] Preferably, lifting handles are fixedly installed on the top left and right sides of the collection frame, and a slurry discharge pipe extending to the bottom of the screen plate is fixedly connected to the right side of the collection box. The other end of the slurry discharge pipe is connected to a slurry recovery pipe for slurry recovery and reflotation.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This utility model provides a high-efficiency flotation desilication device for fine-grained bauxite. By setting up a flow stabilization mechanism with staggered flow stabilizing plates, the slurry and micro-nano bubbles move along a zigzag path during the ascent, which greatly prolongs the contact time and collision probability between the bubbles and the fine-grained minerals, effectively enhancing the adhesion stability between the fine-grained aluminum minerals and the bubbles. At the same time, the introduction of micro-nano bubbles solves the problem of easy loss and difficulty in collection of fine-grained minerals in traditional flotation, improving the flotation recovery rate of aluminum minerals and the grade of concentrate.

[0016] 2. This utility model provides a high-efficiency flotation desilication device for fine-grained bauxite. By using a pressurized dissolved air tank mechanism in conjunction with an annular air outlet pipe, it generates uniformly distributed and highly stable micro-nano bubbles. It has low energy consumption and controllable bubble size, overcoming the shortcomings of existing micro-nano bubble generators, such as high energy consumption and poor stability. In addition, the collection mechanism is equipped with a screen plate and a slurry discharge pipe, which can perform preliminary dewatering and screening of the flotation froth product, and recover the undersize slurry for further flotation, effectively reducing resource waste and improving the overall beneficiation efficiency and economy. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the pressurized dissolved gas tank mechanism and the flotation separation mechanism of this utility model;

[0019] Figure 3 This is a schematic diagram of the current stabilization mechanism of this utility model;

[0020] Figure 4 This is a schematic diagram of the scraping mechanism of this utility model;

[0021] Figure 5 This is a schematic diagram of the collection mechanism structure of this utility model.

[0022] In the diagram: 1. Pressurized dissolved gas tank mechanism; 11. Dissolved gas tank body; 12. Clear water inlet; 13. Pressurization port; 14. Exhaust pipe; 15. Gas release valve; 2. Flotation separation mechanism; 21. Flotation box; 211. Collection box; 212. Discharge pipe; 22. Pipeline chamber; 23. Diversion pipeline; 24. Annular gas outlet pipe; 25. Flow stabilization mechanism; 251. Flow stabilizing column; 252. Vertical flow stabilizing channel; 253. 26. Flow stabilizer plate; 27. Slurry pump body; 3. Slurry conveying pipe; 4. Scraping mechanism; 5. Vertical plate; 6. Servo motor; 7. Drive sprocket; 8. Driven sprocket; 9. Chain; 10. Movable crossbar; 11. Rubber scraper; 12. Collection mechanism; 13. Collection box; 24. Support leg; 35. Limiting frame; 46. Collection frame; 47. Lifting handle; 48. Screen plate; 49. Slurry discharge pipe. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] like Figure 1 , Figure 2 , Figure 3As shown, the high-efficiency flotation desilication device for fine-grained bauxite includes a pressurized dissolved air tank mechanism 1, a flotation separation mechanism 2, a scraping mechanism 3, and a collection mechanism 4. The pressurized dissolved air tank mechanism 1 includes a dissolved air tank body 11, with a clean water inlet 12 fixedly connected to the top of the dissolved air tank body 11 for injecting clean water, a pressurization port 13 fixedly connected to its left side for introducing pressurized air, and an exhaust pipe 14 fixedly connected to its right side. A release valve 15 for controlling gas release is provided on the outer wall of the exhaust pipe 14. The flotation separation mechanism 2 is located on the right side of the pressurized dissolved air tank mechanism 1. The flotation separation mechanism 2 includes a flotation box 21. The bottom of the inner cavity of the flotation box 21 adopts an arc-shaped structure design, avoiding the problem of mineral powder deposition that is easily caused by the traditional square bottom, and ensuring the mixing of slurry and gas. The bubbles flow smoothly at the bottom and do not easily accumulate. A pipeline chamber 22 is provided at the bottom of the inner cavity of the flotation tank 21. Several branch pipes 23 are evenly arranged within the pipeline chamber 22. The end of the exhaust pipe 14 away from the dissolved air tank body 11 passes through the inner cavity of the pipeline chamber 22 and is fixedly connected to the several branch pipes 23. This is used to transport the water containing micro-nano bubbles generated by the pressurized dissolved air tank mechanism 1 to the branch pipes 23. The bottom of each branch pipe 23 is connected to the upper part of the inner cavity of the flotation tank 21 through multiple connecting pipes. An annular air outlet pipe 24 is fixedly connected to the top of each connecting pipe. Several bubble nozzles for generating micro-nano bubbles are fixedly connected in an annular array to the top of each annular air outlet pipe 24. The inner cavity of the flotation tank 21... A flow stabilizing mechanism 25 is provided in the middle. The flow stabilizing mechanism 25 includes a flow stabilizing column 251 fixedly installed on the inner wall of the flotation tank 21. The four sides of the flow stabilizing column 251 are fixedly connected to the four sides of the inner wall of the flotation tank 21. The flow stabilizing column 251 has a rectangular array of vertically penetrating flow stabilizing channels 252. These vertical flow stabilizing channels 252 are located directly above a number of annular air outlet pipes 24. On both sides of the inner wall of each vertical flow stabilizing channel 252, a number of flow stabilizing plates 253 are fixedly installed. The flow stabilizing plates 253 on both sides are combined to form a zigzag flow channel. This inclined design effectively prevents the accumulation of mineral powder on the flow stabilizing plates, and at the same time guides the slurry and bubbles to rise and flow along the zigzag path, significantly increasing the interaction between bubbles and fine mineral particles. To determine the collision probability and contact time of the material, a slurry pump body 26 is installed on the right side of the flotation tank 21. The output end of the slurry pump body 26 is fixedly connected to a slurry delivery pipe 27. The other end of the slurry delivery pipe 27 passes through the chamber between the flow stabilizing mechanism 25 and several annular air outlet pipes 24, and a distributor is fixedly connected to its end. The distributor is a multi-hole distribution pipe or a fan-shaped nozzle, used to evenly disperse the slurry to the bottom area of ​​the flotation tank 21 to avoid excessive local concentration and ensure sufficient contact between the slurry and the micro-nano bubbles. The input end of the slurry pump body 26 is connected to a slurry mixing tank through a pipe. The inner cavity of the slurry mixing tank is equipped with a stirrer, used to fully and evenly mix the fine-grained bauxite ore with water and necessary flotation reagents to form the slurry to be flotated.

[0025] In practice, firstly, clean water is injected into the dissolved air tank body 11 of the pressurized dissolved air tank mechanism 1 through the clean water inlet 12, and simultaneously compressed air is introduced through the pressurization port 13. Under high pressure, the air dissolves in the clean water to form dissolved air water. Then, the release valve 15 is opened, and the dissolved air water quickly enters the pipeline chamber 22 of the flotation separation mechanism 2 through the exhaust pipe 14, and is distributed to each annular air outlet pipe 24 through the diversion pipe 23. When the dissolved air water is suddenly released from the bubble nozzle to the atmospheric pressure environment of the flotation tank 21, a large number of tiny, uniformly distributed micro-nano bubbles will precipitate. At the same time, the fine-grained bauxite slurry, which has been uniformly prepared by the slurry mixing tank, is pumped by the slurry pump body 26. The slurry is pumped into the flotation tank 21 through the slurry delivery pipe 27, located below the flow stabilization mechanism 25. The slurry is fully mixed with the micro-nano bubbles emerging from the bubble nozzle. Under the action of buoyancy, the bubbles carry hydrophobic useful mineral particles (such as aluminum minerals) upward. When the gas-solid aggregate passes through the vertical flow stabilization channel 252 of the flow stabilization mechanism 25, the flow path becomes zigzag under the action of the staggered flow stabilization plates 253, which greatly increases the collision probability and adhesion time between the fine mineral particles and the micro-nano bubbles, and improves the collection efficiency. The bubbles with attached minerals continue to rise, and after passing the top of the flow stabilization column 251, they gather on the liquid surface of the flotation tank 21 to form a foam layer.

[0026] like Figure 4 As shown, the scraping mechanism 3 is located on the top of the flotation tank 21. The scraping mechanism 3 includes a vertical plate 31 fixedly installed on the front side of the top of the flotation tank 21. A servo motor 32 is fixedly installed on the right front end of the vertical plate 31. The output axis of the servo motor 32 passes through the vertical plate 31 and is fixedly installed with a drive sprocket 33. A driven sprocket 34 is movably installed on the left rear end of the vertical plate 31 through bearings, etc. A chain 35 is connected to the outer wall of the drive sprocket 33 and the driven sprocket 34. A movable crossbar 36 is rotatably installed on the side of the chain 35 away from the vertical plate 31. A rubber scraper 37 is fixedly installed at the bottom of the movable crossbar 36. The front and rear sides of the scraper 37 are tightly fitted to the front and rear sides of the inner wall of the flotation box 21 to ensure that there are no dead corners during scraping. A collection box 211 is fixedly installed on the upper right side of the flotation box 21. A discharge channel is opened on the top right side of the flotation box 21, which runs through its own inner cavity and the inner cavity of the collection box 211. The height of the flow stabilizing column 251 is lower than this discharge channel. The liquid level of the slurry in the inner cavity of the flotation box 21 is controlled to be flush with the bottom of the inner side of the discharge channel. A discharge pipe 212 is fixedly connected to the bottom right side of the collection box 211 to discharge the foam product rich in aluminum minerals that is scraped into the collection box 211 by the rubber scraper 37.

[0027] In practice, by activating the servo motor 32 of the scraping mechanism 3, the drive sprocket 33 is rotated. Through the chain 35, the movable crossbar 36 and the rubber scraper 37 fixed at its bottom reciprocate along the liquid surface. The rubber scraper 37 smoothly scrapes the aluminum-rich foam layer into the discharge channel on the right side of the flotation tank 21. The foam then enters the collection box 211 and is discharged through the discharge pipe 212.

[0028] like Figure 5 As shown, the collection mechanism 4 is located on the lower right side of the flotation box 21. The collection mechanism 4 includes a collection box 41, which is supported by four support legs 42 fixedly installed in a rectangular array at its bottom. The collection box 41 is fixedly installed on the lower right side of the flotation box 21 and is located directly below the discharge pipe 212. A limiting frame 43 is fixedly installed on the inner wall of the collection box 41. A collection frame 44 is detachably snapped into the inner ring of the limiting frame 43. A screen plate 46 for dewatering or preliminary screening of foam products is fixedly installed at the bottom of the inner ring of the collection frame 44. Pull handles 45 for easy picking and putting are fixedly installed on the top left and right sides of the collection frame 44. A slurry discharge pipe 47 is fixedly connected to the right side of the collection box 41. The slurry discharge pipe 47 extends to the bottom of the screen plate 46, and its other end is connected to the slurry recovery pipe for recycling the slurry or water that passes through the screen plate 46 and transporting it back to the process for re-flotation or treatment, thereby reducing resource waste.

[0029] In practice, the discharged foam product falls into the collection frame 44 of the collection mechanism 4 below. The foam bursts in the collection frame 44, and the liquid and some very fine particles in it enter the bottom of the collection box 41 through the screen plate 46, while the coarser foam product (concentrate) is trapped on the screen plate 46. The liquid and fine mud at the bottom of the collection box 41 can be returned to the front of the process for reprocessing through the slurry discharge pipe 47. When the concentrate in the collection frame 44 accumulates to a certain amount, the operator can remove the collection frame 44 by pulling the handle 45 for subsequent processing.

[0030] The working principle of this high-efficiency flotation desilication device for fine-grained bauxite will be explained in detail below.

[0031] like Figure 1-5 As shown, the pressurized dissolved air tank mechanism 1 generates water containing dissolved micro-nano bubbles, which is transported to the annular air outlet pipe 24 through the diversion pipe 23. A large number of micro-nano bubbles are released through the bubble nozzle. At the same time, the slurry pump body 26 pumps the mixed slurry in the slurry mixing tank into the flotation tank 21. During the rising process, the bubbles and slurry pass through the staggered flow stabilizing plate 253 of the flow stabilizing mechanism 25 and move along a zigzag path, which enhances the collision and adhesion between the fine mineral particles and the bubbles. The bubbles with attached aluminum minerals float to the liquid surface to form a foam layer, and are finally scraped into the collection box 211 by the rubber scraper 37 of the scraping mechanism 3. The product is then separated and collected by the collection mechanism 4.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency flotation desilication device for fine-grained bauxite, comprising a pressurized dissolved air tank mechanism (1), wherein the pressurized dissolved air tank mechanism (1) comprises a dissolved air tank body (11), a clear water inlet (12) is fixedly connected to the top of the dissolved air tank body (11), a pressurization port (13) is fixedly connected to the left side of the dissolved air tank body (11), and an exhaust pipe (14) is fixedly connected to the right side of the dissolved air tank body (11), wherein a release valve (15) is provided on the outer wall of the exhaust pipe (14), characterized in that: A flotation separation mechanism (2) is provided on the right side of the pressurized dissolved gas tank mechanism (1), a scraping mechanism (3) is provided above the flotation separation mechanism (2), and a collection mechanism (4) is provided on the right side of the flotation separation mechanism (2). The flotation separation mechanism (2) includes a flotation tank (21). The flotation tank (21) has a pipeline chamber (22) located at the bottom of the inner cavity of the flotation tank (21). Several branch pipelines (23) are evenly arranged in the inner cavity of the pipeline chamber (22). The exhaust pipe (14) extends from the dissolved gas tank body (11) to the inner cavity of the pipeline chamber (22) and is fixedly connected to several branch pipelines (23) for conveying micro-nano bubbles. The bottom of the flow pipeline (23) is uniformly and fixedly connected with several connecting pipes that penetrate into the inner cavity of the flotation tank (21), and the top of each connecting pipe is fixedly connected with an annular air outlet pipe (24). The top of the annular air outlet pipe (24) is fixedly connected with several bubble nozzles in an annular array. The inner cavity of the flotation tank (21) is provided with a flow stabilizing mechanism (25). The right side of the flotation tank (21) is provided with a slurry pump body (26). The output end of the slurry pump body (26) is fixedly connected with a slurry conveying pipe (27). The other end of the slurry conveying pipe (27) passes through the chamber between the flow stabilizing mechanism (25) and several annular air outlet pipes (24). The input end of the slurry pump body (26) is connected with a slurry mixing tank.

2. The high-efficiency flotation desilication device for fine-grained bauxite according to claim 1, characterized in that: The flow stabilizing mechanism (25) includes a flow stabilizing column (251), which is fixedly installed on the inner wall of the flotation tank (21) and its four sides are fixedly connected to the four sides of the inner wall of the flotation tank (21). The flow stabilizing column (251) has a rectangular array of several vertical flow stabilizing channels (252) that run vertically through it. The several vertical flow stabilizing channels (252) are located above several annular air outlet pipes (24).

3. The high-efficiency flotation desilication device for fine-grained bauxite according to claim 2, characterized in that: Several flow stabilizing plates (253) are fixedly installed on both sides of the inner wall of several vertical flow stabilizing channels (252), and the flow stabilizing plates (253) on both sides are connected and distributed at an angle to allow the rising bubbles to float in a zigzag pattern.

4. The high-efficiency flotation desilication device for fine-grained bauxite according to claim 1, characterized in that: The inner cavity of the mixing tank is equipped with a stirrer for uniformly mixing the raw ore with water and flotation reagents.

5. The high-efficiency flotation desilication device for fine-grained bauxite according to claim 2, characterized in that: The scraping mechanism (3) includes a vertical plate (31), which is fixedly installed on the top front side of the flotation tank (21). A servo motor (32) is fixedly installed on the right front side of the vertical plate (31). The output shaft of the servo motor (32) passes through to the rear side of the vertical plate (31) and is fixedly installed with a drive sprocket (33). A driven sprocket (34) is movably installed on the left rear side of the vertical plate (31). A chain (35) is connected to the outer wall of the drive sprocket (33) and the driven sprocket (34). A movable crossbar (36) is rotatably installed on the side of the chain (35) away from the vertical plate (31). A rubber scraper (37) is fixedly installed at the bottom of the movable crossbar (36), and the front and rear sides of the rubber scraper (37) are respectively attached to the front and rear sides of the inner wall of the flotation tank (21).

6. The high-efficiency flotation desilication device for fine-grained bauxite according to claim 5, characterized in that: A collection box (211) is fixedly installed on the upper right side of the flotation box (21). A discharge channel is opened on the top right side of the flotation box (21) that connects its own inner cavity and the inner cavity of the collection box (211). The height of the flow stabilizing column (251) is lower than the discharge channel. The liquid level of the slurry in the inner cavity of the flotation box (21) is flush with the bottom of the discharge channel. A discharge pipe (212) is fixedly connected to the bottom right side of the collection box (211) for discharging the foam product containing aluminum minerals scraped off by the rubber scraper (37).

7. The high-efficiency flotation desilication device for fine-grained bauxite according to claim 6, characterized in that: The collection mechanism (4) includes a collection box (41), which is fixedly installed on the lower right side of the flotation tank (21) and below the discharge pipe (212). Four support legs (42) are fixedly installed in a rectangular array at the bottom of the collection box (41). A limiting frame (43) is fixedly installed on the inner side wall of the collection box (41). A collection frame (44) is snapped into the inner ring of the limiting frame (43). A screen plate (46) for screening foam products is fixedly installed at the bottom of the inner ring of the collection frame (44).

8. The high-efficiency flotation desilication device for fine-grained bauxite according to claim 7, characterized in that: The top left and right sides of the collection frame (44) are fixedly equipped with lifting handles (45), and the right side of the collection box (41) is fixedly connected to a slurry discharge pipe (47) that extends to the bottom of the screen plate (46). The other end of the slurry discharge pipe (47) is connected to a slurry recovery pipe for slurry recovery and reflotation.

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