Flotation device

Abstract

The utility model relates to a flotation device which comprises a flotation tank (1), a slurry distribution pipe (2), a foam distribution pipe (3), a stirring device (4) and an agent device (5), a supporting plate (12), an overflow port (13), a feeding port (14), an agent inlet (15) and a discharging port (16) are arranged on the flotation tank (1), and a flotation cavity is formed in the flotation tank (1). The slurry distribution pipe is horizontally arranged in the flotation cavity and communicated with the feeding port, and a plurality of uniformly-distributed slurry distribution ports are formed in the slurry distribution pipe. The foam distribution pipe is horizontally arranged in the flotation cavity and communicated with the medicine inlet, and a plurality of evenly-distributed foam distribution openings are formed in the foam distribution pipe. The stirring device comprises a rotating device and a stirring shaft, and the rotating device is fixedly arranged on the supporting plate. The upper end of the stirring shaft is connected with the rotating device, and the lower end of the stirring shaft extends into the flotation cavity and is provided with stirring blades. And the medicament device is communicated with the medicament inlet. The low-sodium carnallite flotation device can improve the flotation effect and improve the quality of low-sodium carnallite.

Description

Technical Field

[0001] The utility model relates to a flotation device, and more specifically to the structure of a flotation device. Background Art

[0002] Carnallite is a mineral formed by the crystallization of salt lake brine containing magnesium, potassium, sodium and other elements. It is one of the important raw materials for the production of potassium chloride. Carnallite is usually produced by reverse flotation-cold crystallization process. First, sodium chloride is separated from the carnallite slurry by flotation reagents, and the carnallite is retained in the slurry to obtain low-sodium carnallite. Then, the low-sodium carnallite is hydrolyzed and crystallized to obtain high-grade potassium chloride. The quality of low-sodium carnallite has a great influence on the recovery rate of subsequent processes.

[0003] When the existing flotation device is working, the disc-shaped turbine self-priming paddle of the stirring device rotates at a high speed to suck gas into the slurry to form bubbles. The bubbles are stirred and thrown out and then dispersed in the slurry. The sodium chloride particles in the slurry are attached to the bubbles through the flotation reagent, and are discharged after floating to the surface of the slurry with the bubbles. The existing flotation device cannot control the air intake, the bubbles generated are large, the bubble diffusion is uneven, and the sodium chloride particles cannot fully contact with the bubbles, resulting in poor flotation effect and poor quality of low-sodium carnallite.

[0004] Moreover, with long-term mining, the content of sodium chloride in carnallite increases, and the particle size gradually increases. The larger the particle size, the greater its gravity. The turbine self-priming paddle of the existing flotation device cannot achieve forced convection of the slurry, and cannot suspend the large-sized sodium chloride particles in the liquid phase, resulting in poor capture effect of the flotation agent on large particles of sodium chloride. In order to improve the flotation effect, it is necessary to increase the amount of flotation agent used, but increasing the amount of flotation agent used will affect the parameter adjustment of the flotation operation, and ultimately affect the product output and quality.

[0005] In addition, due to the high viscosity of the flotation agent, chemical reactions are likely to occur to form solid impurities, which are likely to form attachments in the flotation agent tank and pipelines, reducing pipeline flux and clogging the pipeline, making it difficult to clear, affecting the accurate addition of the flotation agent and also affecting the flotation effect.

[0006] The utility model aims to solve the problem of low flotation efficiency and poor flotation effect of a flotation device when producing potassium chloride through a reverse flotation-cold crystallization process. Utility Model Content

[0007] In order to solve the above problems, the utility model provides a flotation device, including a flotation tank 1, a circulation baffle cylinder 11, a slurry distribution pipe 2, a foam distribution pipe 3, a stirring device 4 and a reagent device 5. The flotation tank 1 is open at the top, and a support plate 12 is arranged at the opening. An overflow port 13 is formed at the upper part of the side wall of the flotation tank 1, a feed port 14 and a drug feed port 15 are arranged at the lower part of the side wall, and a discharge port 16 is arranged at the bottom. A flotation cavity 17 is formed inside the flotation tank 1, and a circulation baffle cylinder 11 is arranged in the flotation cavity 17. The circulation baffle cylinder 11 is a cylinder, arranged vertically, and the lower end is spaced from the bottom plate of the flotation tank 1.

[0008] The slurry distribution pipe 2 is annular, horizontally arranged in the flotation chamber 17, located below the circulation baffle cylinder 11, and connected to the feed port 14 through the feed pipe 21. The slurry distribution pipe 2 is provided with a plurality of evenly distributed slurry distribution ports 22. The foam distribution pipe 3 is annular, horizontally arranged in the flotation chamber 17, located below the slurry distribution pipe 2, and connected to the drug inlet 15 through the connecting pipe 31. The foam distribution pipe 3 is provided with a plurality of evenly distributed foam distribution ports 32. The stirring device 4 includes a rotating device and a stirring shaft 42, and the rotating device is fixedly arranged on the support plate 12. The stirring shaft 42 is arranged vertically, the upper end is connected to the rotating device, and the lower end passes through the support plate 12 and extends into the circulation baffle cylinder 11, and a stirring blade 43 is provided at the lower end. The reagent device 5 is connected to the drug inlet 15, and is used to provide bubbles and flotation reagents.

[0009] When the utility model is used, the ore pulp enters the slurry distribution pipe 2 from the feed port 14, and is evenly distributed in the flotation chamber 17 through the slurry distribution pipe 2. The bubbles and the flotation reagent enter the foam distribution pipe 3 from the drug feed port 15, and are evenly dispersed in the flotation chamber 17 through the foam distribution pipe 3. The flotation reagent is added into the flotation chamber 17, and the bubbles are evenly dispersed in the ore pulp under the stirring action of the stirring blade 43, so that the large particles of sodium chloride in the ore pulp float in the ore pulp. The sodium chloride is attached to the bubbles through the action of the flotation reagent, and is discharged from the overflow port 13 after floating to the liquid surface, and the low-sodium carnallite is discharged from the discharge port 16.

[0010] The utility model sets a slurry distribution pipe 2, which is annular, and is provided with a plurality of evenly distributed slurry distribution ports 22, so that the newly entered ore pulp can be dispersed in the flotation chamber 17, and the large particles of sodium chloride in the newly entered ore pulp can be prevented from gathering. The foam distribution pipe 3 is set in annular, and is provided with a plurality of evenly distributed foam distribution ports 32, so that the bubbles and the reagent can be evenly dispersed in the flotation chamber 17. A stirring blade 43 is set at the lower end of the stirring shaft 42, and compared with the existing disc-shaped turbine self-priming paddle, the ore pulp can be forced to convect, and the sodium chloride particles with larger particle size can be suspended in the liquid phase, so that the bubbles and the reagent are evenly dispersed in the ore pulp, and the flotation effect of the flotation reagent on the large particles of sodium chloride is improved, thereby improving the quality of low-sodium carnallite.

[0011] Preferably, the pharmaceutical device 5 comprises a delivery pump 51, a delivery pipe 52, a liquid inlet cylinder 53, a liquid inlet tank 54, a drug adding tube 58, a jet funnel 55 and an air suction tube 56, wherein the delivery pipe 52 is respectively connected to the drug inlet 15 and the outlet of the delivery pump 51. The liquid inlet cylinder 53 is arranged vertically, and the lower end is connected to the inlet of the delivery pump 51, the liquid inlet tank 54 is fixedly arranged at the upper end of the liquid inlet cylinder 53, and a funnel-shaped liquid outlet 541 is arranged on the bottom plate of the liquid inlet tank 54, and the liquid outlet 541 is connected to the liquid inlet cylinder 53, and the inlet end of the drug adding tube 58 is located outside the liquid inlet tank 54, and the outlet end passes through the liquid inlet tank 54 and extends to below the liquid outlet 541. The air intake pipe 56 is arranged vertically, and the lower end is fixedly connected to one end of the delivery pipe 52 close to the medicine inlet 15 , and the interior is connected. The jet funnel 55 is fixedly arranged in the delivery pipe 52 , close to the air intake pipe 56 , and is located on the side of the air intake pipe 56 away from the medicine inlet 15 .

[0012] The overflow tank contains a slurry adjusting liquid for slurry adjusting the flotation reagent. The slurry adjusting liquid overflows from the liquid outlet 541 into the liquid inlet cylinder 53. The flotation reagent is added into the liquid inlet cylinder 53 through the dosing pipe 58 to form a mixed liquid with the slurry adjusting liquid. The mixed liquid is pressurized by the delivery pump 51 and then sprayed to the rear end of the delivery pipe 52 through the jet funnel 55, forming a negative pressure around the outlet of the jet funnel 55. Air is sucked into the delivery pipe 52 from the suction pipe 56. The relative movement of the air flow and the liquid allows the air and liquid to be fully mixed to form a foam mixed liquid containing bubbles and the flotation reagent. The foam mixed liquid is dispersed into the flotation chamber 17 through the foam distributor. By connecting the air inlet pipe with the delivery pipe 52, the air flow is first mixed with the mixed liquid to form a foam mixed liquid containing uniformly distributed smaller bubbles. Then the foam mixed liquid is added to the flotation tank 1, so that the bubbles can be more evenly dispersed in the ore pulp, thereby improving the flotation effect.

[0013] Preferably, a baffle plate 581 is provided at the periphery of the outlet end of the dosing tube 58, and the baffle plate 581 is located below the liquid outlet 541. The baffle plate 581 is provided at the periphery of the outlet end of the dosing tube 58 to disperse the slurry mixing liquid overflowing from the liquid inlet tank 54 to the liquid inlet cylinder 53, so that the slurry mixing liquid and the flotation agent are evenly mixed.

[0014] Preferably, a bubble generator 57 is further included, which is connected to the delivery pipe 52 and is located on the side of the jet funnel 55 close to the drug inlet 15. The bubble generator 57 can be used to replenish air and can be used in conjunction with the air inlet pipe to control the size, uniformity and dispersion of the generated bubbles.

[0015] Preferably, a heater 582 is provided on the dosing tube 58. The heater 582 can heat the flotation reagent to reduce the viscosity of the flotation reagent, prevent it from adhering to the inner wall of the dosing tube 58 and causing the dosing tube 58 to be blocked, and solve the problem of viscosity and poor fluidity of the flotation reagent.

[0016] Preferably, a filter 561 and an air intake regulating valve 562 are provided on the air intake pipe 56. The filter 561 can filter impurities in the air to prevent them from clogging the pipe and entering the flotation tank 1, and the air intake regulating valve 562 can adjust the air intake amount according to process requirements.

[0017] Preferably, the opening of the slurry distribution port 22 faces upward, and the opening of the foam distribution port 32 faces upward. Setting the opening of the slurry distribution port 22 to face upward can promote the rise of large particles of sodium chloride with the upward flowing slurry. Setting the opening of the foam distribution port 32 to face upward allows bubbles to rise evenly and captures sodium chloride within a particle size range.

[0018] Preferably, the rotating device is a rotating motor 41 . BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 .Schematic diagram of the overall structure of the flotation device;

[0020] Figure 2 . Schematic diagram of the internal structure of the flotation cell;

[0021] Figure 3 . Figure 2 Schematic diagram of the AA section;

[0022] Figure 4 .Schematic diagram of the cross-sectional structure of the liquid inlet cylinder and the liquid inlet tank;

[0023] Figure 5 .Schematic diagram of the internal structure of the conveying pipe.

[0024] In the figure, 1. flotation tank, 11. circulation baffle cylinder, 12. support plate, 13. overflow port, 14. feed port, 15. drug feed port, 16. discharge port, 17. flotation chamber, 2. slurry distribution pipe, 21. feed pipe, 22. slurry distribution port, 3. foam distribution pipe, 31. connecting pipe, 32. foam distribution port, 4. stirring device, 41. rotating motor, 42. stirring shaft, 43. stirring blade, 5. medicine device, 51. delivery pump, 52. delivery pipe, 53. liquid inlet cylinder, 54. liquid inlet tank, 541. liquid outlet, 542. liquid adding port, 55. jet funnel, 56. suction pipe, 561. filter, 562. air intake regulating valve, 57. bubble generator, 58. drug adding pipe, 581. baffle, 582. heater. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0026] like Figure 1 , Figure 2 and Figure 3As shown, the flotation device includes a flotation tank 1, a slurry distribution pipe 2, a foam distribution pipe 3, a stirring device 4 and a reagent device 5.

[0027] The flotation tank 1 has an opening at the top, and a support plate 12 is arranged at the opening. An overflow port 13 is formed at the upper part of the side wall of the flotation tank 1, and a feed port 14 and a drug feed port 15 are arranged at the lower part of the side wall. A discharge port 16 is arranged on the bottom plate of the flotation tank 1. A flotation cavity 17 is formed inside the flotation tank 1, and a circulation baffle cylinder 11 is arranged in the flotation cavity 17.

[0028] The circulation baffle cylinder 11 is a cylinder, which is vertically arranged in the flotation chamber 17 , and the lower end thereof is spaced apart from the bottom plate of the flotation tank 1 .

[0029] The slurry distribution pipe 2 is annular and horizontally arranged in the flotation chamber 17 , located below the circulation baffle cylinder 11 , and connected to the feed port 14 through the feed pipe 21 .

[0030] The slurry distribution pipe 2 is provided with a plurality of evenly distributed slurry distribution ports 22 , and the openings of the slurry distribution ports 22 face upward.

[0031] The slurry entering the slurry distribution pipe 2 from the feed port 14 is evenly distributed in the flotation chamber 17 through the slurry distribution pipe 2, so that the newly entered slurry can be dispersed in the flotation chamber 17 to prevent the large particles of sodium chloride in the newly entered slurry from agglomerating. The opening of the slurry distribution port 22 is arranged to face upward, so that the large particles of sodium chloride can be promoted to rise with the upward flowing slurry.

[0032] The foam distribution pipe 3 is annular and horizontally arranged in the flotation chamber 17, located below the slurry distribution pipe 2, and connected to the drug inlet 15 through the connecting pipe 31. The foam distribution pipe 3 is provided with a plurality of evenly distributed foam distribution ports 32, and the openings of the foam distribution ports 32 face upward.

[0033] The foam mixed liquid entering the foam distribution pipe 3 from the drug inlet 15 is evenly dispersed in the flotation chamber 17 through the foam distribution pipe 3. The foam distribution pipe 3 is provided with a plurality of evenly distributed foam distribution ports 32, which can make the bubbles and flotation reagents in the foam mixed liquid evenly dispersed in the flotation chamber 17, and promote the dispersion of bubbles. The opening of the foam distribution port 32 is set to face upward, so that the bubbles rise evenly and the sodium chloride is captured.

[0034] The stirring device 4 includes a rotating device and a stirring shaft 42. The rotating device is a rotating motor 41, and the rotating motor 41 is fixedly arranged on the support plate 12. The stirring shaft 42 is arranged vertically, the upper end is fixedly connected to the rotating shaft of the rotating motor 41, and the lower end passes through the support plate 12 and extends into the circulation baffle cylinder 11, and a stirring blade 43 is arranged at the lower end.

[0035] A stirring blade 43 is arranged at the lower end of the stirring shaft 42. Compared with the disc-shaped turbine self-priming paddle in the existing equipment, the stirring blade 43 of the utility model can force convection of the slurry. Under the stirring action of the stirring blade 43, the sodium chloride particles with larger particle size can be suspended in the liquid phase, and the bubbles and the flotation agent can be evenly dispersed in the slurry, thereby improving the flotation effect of the flotation agent on large particles of sodium chloride, thereby improving the quality of low-sodium carnallite.

[0036] like Figure 1 and Figure 4 As shown, the pharmaceutical device 5 includes a delivery pump 51, a delivery pipe 52, a liquid inlet cylinder 53, a liquid inlet tank 54, a jet funnel 55, a dosing pipe 58, an air suction pipe 56 and a bubble generator 57. The two ends of the delivery pipe 52 are respectively connected to the drug inlet 15 and the outlet of the delivery pump 51.

[0037] The air intake pipe 56 is vertically arranged, and the lower end is fixedly connected to the end of the delivery pipe 52 close to the medicine inlet 15, and the interior is connected. The air intake pipe 56 is provided with a filter 561 and an air intake regulating valve 562.

[0038] The air intake pipe 56 is used to suck air into the delivery pipe 52. Impurities in the air can be filtered through the filter 561 to prevent the pipe from being blocked and entering the flotation tank 1. The air intake regulating valve 562 can adjust the air intake amount according to process requirements.

[0039] The jet funnel 55 is fixedly arranged in the delivery pipe 52, close to the air intake pipe 56, and located on the side of the air intake pipe 56 away from the drug inlet 15. The expanded end of the jet funnel 55 is fixedly connected to the delivery pipe 52, and the contracted end of the jet funnel 55 faces the liquid inlet.

[0040] The bubble generator 57 is connected to one end of the delivery tube 52 near the drug inlet 15 and is located on one side of the jet funnel 55 near the drug inlet 15. The bubble generator 57 can be used to replenish air and can be used in conjunction with the air inlet pipe to control the size, uniformity and dispersion of the generated bubbles.

[0041] like Figure 1 and Figure 5 As shown, the liquid inlet cylinder 53 is vertically arranged, and the lower end is connected to the inlet of the delivery pump 51. The liquid inlet groove 54 is fixedly arranged at the upper end of the liquid inlet cylinder 53. A liquid adding port 542 is arranged at the bottom of the side wall of the liquid inlet groove 54. A funnel-shaped liquid outlet 541 is arranged on the bottom plate of the liquid inlet groove 54, and the liquid outlet 541 is connected to the liquid inlet cylinder 53.

[0042] The overflow tank contains a slurry mixing liquid for slurry mixing of the flotation reagent. The slurry mixing liquid is brine or crystal mother liquor. The slurry mixing liquid overflows from the liquid outlet 541 into the liquid inlet cylinder 53.

[0043] The inlet end of the dosing tube 58 is located outside the liquid inlet tank 54, and the outlet end of the dosing tube 58 extends through the liquid inlet tank 54 to below the liquid outlet 541. A deflection baffle 581 is provided on the outer periphery of the outlet end of the dosing tube 58, and the deflection baffle 581 is located below the liquid outlet 541.

[0044] The dosing tube 58 is used to add flotation reagents into the liquid inlet cylinder 53. The baffle plate 581 can disperse the slurry mixing liquid overflowing from the liquid inlet tank 54 into the liquid inlet cylinder 53 so that the slurry mixing liquid and the flotation reagent are evenly mixed. The slurry mixing liquid and the flotation reagent are mixed in the liquid inlet cylinder 53 to obtain a mixed liquid.

[0045] A heater 582 is provided on the dosing tube 58. The heater 582 can heat the flotation reagent to reduce the viscosity of the flotation reagent, prevent it from adhering to the inner wall of the dosing tube 58 and clogging the dosing tube 58, and solve the problem of viscosity and poor fluidity of the flotation reagent.

[0046] The delivery pump 51 is used to pressurize the mixed liquid in the liquid inlet cylinder 53 and then let it enter the delivery pipe 52. The mixed liquid pressurized by the delivery pump 51 is sprayed to the rear end of the delivery pipe 52 through the jet funnel 55, forming a negative pressure around the outlet (narrowing end) of the jet funnel 55, and air is sucked into the delivery pipe 52 from the suction pipe 56. The high-speed relative motion of the airflow and the mixed liquid allows the gas and liquid to be fully mixed to form a foam mixed liquid containing bubbles and flotation agents.

[0047] When the utility model is used, the ore pulp enters the slurry distribution pipe 2 from the feed port 14, and is evenly distributed in the flotation chamber 17 through the slurry distribution pipe 2. The slurry adjusting liquid contained in the overflow tank overflows from the liquid outlet 541 to the liquid inlet cylinder 53. The flotation reagent is added from the dosing pipe 58 to the liquid inlet cylinder 53 and is evenly mixed with the slurry adjusting liquid to obtain a mixed liquid. The mixed liquid is pressurized by the delivery pump 51 and then sprayed to the rear end of the delivery pipe 52 through the jet funnel 55, and a negative pressure is formed around the outlet of the jet funnel 55. Air is sucked into the delivery pipe 52 from the suction pipe 56, and the air flow and the mixed liquid move relatively at high speed, so that the gas and liquid are fully mixed to form a foam mixed liquid containing bubbles and the flotation reagent. The foam mixed liquid is dispersed into the flotation chamber 17 through the foam distributor. Under the stirring action of the stirring blade 43, the foam mixed liquid is evenly mixed with the ore pulp. The sodium chloride in the ore pulp adheres to the bubbles, floats to the liquid surface, and is discharged from the overflow port 13. The low-sodium carnallite is regularly discharged from the discharge port 16.

[0048] The utility model provides a circular slurry distribution pipe, and provides a plurality of evenly distributed slurry distribution ports 22 on the slurry distribution pipe 2, so that the slurry can be dispersed in the flotation chamber 17, and the large particles of sodium chloride in the newly entered slurry can be prevented from gathering. The circular foam distribution pipe 3 is provided, and a plurality of evenly distributed foam distribution ports 32 are provided on the foam distribution pipe 3, so that the bubbles and the flotation reagent can be evenly dispersed in the flotation chamber 17. A stirring blade 43 is provided at the lower end of the stirring shaft 42, and compared with the existing disc-shaped turbine self-priming paddle, the slurry can be forced to convect, and the sodium chloride particles with larger particle size can be suspended in the liquid phase, so that the bubbles and the flotation reagent are evenly dispersed in the slurry, and the flotation effect of the flotation reagent on the large particles of sodium chloride is improved, thereby improving the quality of low-sodium carnallite.

[0049] The outlet of the dosing tube 58 is located in the liquid inlet cylinder 53, and the baffle plate 581 is arranged on the periphery of the outlet end of the dosing tube 58 to disperse the slurry mixing liquid overflowing from the liquid inlet tank 54 to the liquid inlet cylinder 53, so that the slurry mixing liquid and the flotation agent are evenly mixed. The heater 582 is arranged on the dosing tube 58 to heat the flotation agent, reduce the viscosity of the flotation agent, prevent it from adhering to the pipeline and blocking the pipeline to solve the problem of poor viscosity and fluidity of the flotation agent. A jet funnel 55 is arranged in the delivery pipe 52, and the air inlet pipe is connected to the delivery pipe 52, so that the agent and the bubbles can be evenly mixed and then added to the flotation chamber 17, promoting the diffusion of bubbles in the ore pulp of the flotation chamber 17. The bubble generator 57 can be used for air replenishment, and it can be switched with the air inlet pipe or used at the same time to control the size of the generated bubbles, the uniformity of the bubbles, and the degree of dispersion of the bubbles.

[0050] It should be noted that the above-mentioned embodiments illustrate rather than limit the invention and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims.

Claims

1. A flotation device, characterized in that: The invention comprises a flotation tank (1), a slurry distribution pipe (2), a foam distribution pipe (3), a stirring device (4) and a reagent device (5). The flotation tank (1) has an opening at the top, a support plate (12) is arranged at the opening, an overflow port (13) is formed at the top of the side wall of the flotation tank (1), a feed port (14) and a drug feed port (15) are arranged at the bottom of the side wall, a discharge port (16) is arranged at the bottom, a flotation chamber (17) is formed inside the flotation tank (1), and a circulation baffle cylinder (11) is arranged inside the flotation chamber (17); The circulating baffle cylinder (11) is a cylinder, arranged vertically, and the lower end is spaced apart from the bottom plate of the flotation tank (1); The slurry distribution pipe (2) is annular and horizontally arranged in the flotation chamber (17), located below the circulation baffle cylinder (11), and connected to the feed port (14) through the feed pipe (21). The slurry distribution pipe (2) is provided with a plurality of evenly distributed slurry distribution ports (22); The foam distribution pipe (3) is annular and horizontally arranged in the flotation chamber (17), located below the slurry distribution pipe (2), and connected to the drug inlet (15) through a connecting pipe (31). The foam distribution pipe (3) is provided with a plurality of uniformly distributed foam distribution ports (32); The stirring device (4) comprises a rotating device and a stirring shaft (42). The rotating device is fixedly arranged on the supporting plate (12); The stirring shaft (42) is arranged vertically, the upper end of which is connected to the rotating device, the lower end of which passes through the supporting plate (12) and extends into the circulation baffle cylinder (11), and the lower end of which is provided with a stirring blade (43); The medicine device (5) is communicated with the medicine inlet (15) and is used to provide bubbles and flotation agents.

2. The flotation device according to claim 1, characterized in that: The medicine device (5) comprises a delivery pump (51), a delivery pipe (52), a liquid inlet cylinder (53), a liquid inlet tank (54), a medicine adding pipe (58), a jet funnel (55) and an air suction pipe (56). The delivery pipe (52) is respectively connected to the drug inlet (15) and the outlet of the delivery pump (51); The liquid inlet cylinder (53) is arranged vertically, and the lower end thereof is connected to the inlet of the delivery pump (51); The liquid inlet groove (54) is fixedly arranged at the upper end of the liquid inlet cylinder (53), and a funnel-shaped liquid outlet (541) is arranged on the bottom plate of the liquid inlet groove (54), and the liquid outlet (541) is communicated with the liquid inlet cylinder (53); The inlet end of the drug adding pipe (58) is located outside the liquid inlet tank (54), and the outlet end passes through the liquid inlet tank (54) and extends to below the liquid outlet (541); The air intake pipe (56) is arranged vertically, and the lower end is fixedly connected to the end of the delivery pipe (52) close to the medicine inlet (15), and the interior is communicated; The jet funnel (55) is fixedly arranged in the delivery pipe (52), close to the air intake pipe (56), and located on a side of the air intake pipe (56) away from the medicine inlet (15).

3. The flotation device according to claim 2, characterized in that: A baffle plate (581) is provided on the outer periphery of the outlet end of the dosing tube (58). The deflection baffle (581) is located below the liquid outlet (541).

4. The flotation device according to claim 3, characterized in that: Also includes a bubble generator (57), The bubble generator (57) is communicated with the delivery pipe (52) and is located on a side of the jet funnel (55) close to the medicine inlet (15).

5. The flotation device according to claim 4, characterized in that: The dosing pipe (58) is provided with a heater (582).

6. The flotation device according to claim 5, characterized in that: The air intake pipe (56) is provided with a filter (561) and an air intake regulating valve (562).

7. The flotation device according to claim 6, characterized in that: The slurry distribution port (22) has an opening facing upward; The opening of the foam distribution port (32) faces upward.

8. The flotation device according to claim 7, characterized in that: The rotating device is a rotating motor (41).

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