A multi-stage mineral flotation device

Abstract

The present invention relates to the technical field of mineral flotation, and specifically relates to a multi-stage mineral flotation device, which includes a plurality of flotation devices connected in sequence. The flotation device includes a flotation cell, a mixing mechanism is arranged in the middle of the flotation cell, and an auxiliary component is arranged inside the flotation cell. The beneficial effects of the present invention are as follows: When in use, start the second driving member to rotate forward. In the first state, the part of the pulp in the flotation cell close to the inner wall of the flotation cell rises, and the pulp close to the connecting pipe descends, forming a circulation to float the mineral particles in the pulp. As the usage time increases, when there are more and more gangue particles at the bottom of the flotation cell, start the second driving member to rotate in reverse. The relative flow impact between the pulp pushed outward by the mineralization disc and the gangue particles and mineral particles pushed inward by the feeding plate makes the gangue particles accumulated at the bottom of the flotation cell loose and contact with the bubbles again, and float the mineral particles doped in the gangue particles again, thereby improving the flotation effect.

Description

Technical Field

[0001] The present invention relates to the technical field of mineral flotation, and particularly relates to a multi-stage mineral flotation device. Background Art

[0002] The process of separating useful minerals from useless minerals (usually called gangue) or harmful minerals in mineral raw materials by physical or chemical methods, or separating multiple useful minerals is called ore dressing. Ore dressing is an important link in the production of the entire mineral product.

[0003] Flotation technology is one of the commonly used technologies in the ore dressing process. Flotation technology is based on the difference in the surface properties of mineral particles and gangue particles. After hydrophobically treating the surface of mineral particles, the buoyancy of bubbles is used to float the mineral particles. There are few naturally hydrophobic minerals. Therefore, in flotation, a collector is often added to the pulp to enhance the hydrophobicity of the minerals to be floated; various regulators are added to improve selectivity; a foaming agent is added and aerated to generate bubbles. The most basic behavior in the flotation process is the mineralization of flotation bubbles, that is, the attachment of ore, medicine, and bubbles. Hydrophobic mineral particles are attached to the bubbles and float up for separation. Thus, the separation of gangue and minerals is achieved.

[0004] In the test multi-stage mineral flotation device and its application method disclosed in Chinese Patent CN108636618A, the multi-stage mineral flotation device includes a plurality of mineral flotation devices connected in sequence. The mineral flotation device includes a base, in which a flotation motor is installed, and the rotating shaft of the flotation motor extends from the tabletop of the base; a flotation tank, which is detachably installed on the base, and an impeller is rotatably installed at the bottom of the flotation tank. The rotating shaft of the flotation motor is detachably connected to the rotating shaft of the impeller; a guide groove is circumferentially arranged outside the top of the flotation tank, and the guide groove is used to collect the concentrate overflowing from the top of the flotation tank. A concentrate discharge port is provided at the bottom of the guide groove, and the concentrate discharge port of the previous-stage mineral flotation device is communicated with the flotation tank of the next-stage mineral flotation device through a concentrate conveying pipe; an air pipe, which extends to the bottom of the flotation tank and is used to introduce air into the flotation tank.

[0005] However, compared with the prior art and the comparison scheme, in the actual use process of this multi-stage mineral flotation device, the following problems still exist:

[0006] In the process of flotation of minerals, air is introduced through an air pipe, and then the impeller at the bottom of the flotation cell rotates to shear the introduced air to form bubbles. At the same time, the rotation of the impeller drives the pulp to flow, so as to mix the pulp, bubbles and reagents. The volume of the bubbles is relatively large compared with the mineral particles in the pulp, and the resistance suffered during the flow in the pulp is relatively large, and the buoyancy is large, so it will float upward during the flow. The volume of the mineral particles in the pulp is relatively small, and the resistance suffered during the flow in the pulp is relatively small compared with the bubbles, and the buoyancy is small. If they are not mixed with the bubbles during the flow, they will fall to the bottom of the flotation cell together with the gangue particles. As the use time increases, there are more and more gangue particles at the bottom of the flotation cell, and the mixed mineral particles are more difficult to be mixed with the bubbles for flotation. The mixing effect of the bubbles and the mineral particles in the pulp is not good, resulting in poor flotation effect. Summary of the Invention

[0007] The present invention provides a multi-stage mineral flotation device to solve the above technical problems.

[0008] The multi-stage mineral flotation device of the present invention adopts the following technical solutions: it includes a plurality of flotation devices connected in sequence. The flotation device includes a flotation cell. A mixing mechanism is arranged in the middle of the flotation cell. An auxiliary component is arranged inside the flotation cell, and the position of the auxiliary component corresponds to the position of the mixing mechanism. A reagent adding mechanism is arranged inside the flotation cell, and a foam scraping mechanism is arranged on the flotation cell;

[0009] An annular grid is arranged inside the flotation cell, a connecting groove is opened at the bottom of the flotation cell, and a first gear is arranged inside the connecting groove;

[0010] The mixing mechanism includes a first driving member. A first transmission belt is arranged at the output end of the first driving member. The first driving member is connected to a bubble mineralization component through the first transmission belt, and a connecting pipe is arranged on the bubble mineralization component;

[0011] The bubble mineralization component includes a first connecting shaft. A first transmission wheel is arranged at one end of the first connecting shaft. The first transmission wheel is connected to the first driving member through the first transmission belt. A spiral plate is arranged on the first connecting shaft. A mineralization disc is arranged at the end of the first connecting shaft away from the first transmission wheel. A second gear is arranged on the side of the mineralization disc away from the spiral plate;

[0012] The auxiliary component includes a toothed ring. A rotating ring is arranged on the toothed ring, and a material deflecting plate is arranged on the rotating ring.

[0013] Further, a connecting frame is arranged at the top of the flotation cell. A first discharge pipe is arranged at the bottom of one side of the flotation cell. A collection tank is arranged on the flotation cell, and a second discharge pipe is arranged at the bottom of the collection tank.

[0014] Further, an air inlet pipe is provided on the connecting pipe, a connecting cover is provided at one end of the connecting pipe, the spiral plate is arranged inside the connecting cover, and a feed pipe is provided on the connecting cover.

[0015] Further, the chemical addition mechanism includes a chemical addition pipe, a valve is provided on the chemical addition pipe, a distribution pipe is provided at one end of the chemical addition pipe, and a nozzle is provided on the distribution pipe.

[0016] Further, the foam scraping mechanism includes a second driving member fixedly installed on the flotation cell, a second transmission belt is provided at the output end of the second driving member, the second driving member is connected to a second transmission wheel through the second transmission belt, a second connecting shaft is arranged in the middle of the second transmission wheel, a first foam scraping frame is provided on the second connecting shaft, a third transmission wheel is provided at one end of the second connecting shaft away from the second transmission wheel, a third transmission belt is provided on the third transmission wheel, the third transmission wheel is connected to a fourth transmission wheel through the third transmission belt, the fourth transmission wheel is connected to a transmission shaft, the transmission shaft is rotatably connected to one side of the flotation cell, the transmission shaft is connected to a fifth transmission wheel, a third connecting shaft is provided on the fifth transmission wheel, the second connecting shaft, the fourth transmission wheel, and the third connecting shaft are all rotatably connected to the flotation cell, and a second foam scraping frame is provided on the third connecting shaft.

[0017] Further, the connecting pipe is fixedly installed on the connecting frame.

[0018] Further, the second gear meshes with the first gear.

[0019] Further, the toothed ring is connected to the second gear through the first gear.

[0020] Further, the chemical addition pipe is fixedly connected to the connecting frame through a hoop.

[0021] Further, the number of the material stirring plates is multiple, and they are circumferentially and arrayedly distributed on the rotating ring, and the shape of the material stirring plate is arc-shaped.

[0022] The beneficial effects of the present invention are as follows: during use, start the second driving member to rotate forward. In the first state, the part of the pulp in the flotation cell close to the inner wall of the flotation cell rises, and the pulp close to the connecting pipe descends, forming a cycle to float the mineral particles in the pulp. As the use time increases, when there are more and more gangue particles at the bottom of the flotation cell, start the second driving member to rotate in reverse. The relative flow impact between the pulp pushed outward by the mineralization disc and the gangue particles and mineral particles pushed inward by the material stirring plates makes the gangue particles accumulated at the bottom of the flotation cell loose and contact with the bubbles again, and float the mineral particles doped in the gangue particles again, thereby improving the flotation effect. Description of the Drawings

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 Structural schematic diagram of the first perspective of the embodiment of the present invention;

[0025] Figure 2 Structural schematic diagram of the second perspective of the embodiment of the present invention;

[0026] Figure 3 Structural schematic diagram of the first perspective of the flotation device of the embodiment of the present invention;

[0027] Figure 4 Structural schematic diagram of the second perspective of the flotation device of the embodiment of the present invention;

[0028] Figure 5 Cross-sectional structural schematic diagram of the flotation device of the embodiment of the present invention;

[0029] Figure 6 Schematic diagram of the pulp flow trajectory at the auxiliary component in the first state of the embodiment of the present invention;

[0030] Figure 7 Schematic diagram of the pulp flow trajectory in the flotation cell in the first state of the embodiment of the present invention;

[0031] Figure 8 Schematic diagram of the pulp flow trajectory at the auxiliary component in the second state of the embodiment of the present invention;

[0032] Figure 9 Schematic diagram of the pulp flow trajectory in the flotation cell in the second state of the embodiment of the present invention;

[0033] Figure 10 Structural schematic diagram of the flotation cell of the embodiment of the present invention;

[0034] Figure 11 Cross-sectional structural schematic diagram of the flotation cell of the embodiment of the present invention;

[0035] Figure 12 Structural schematic diagram of the mixing mechanism of the embodiment of the present invention;

[0036] Figure 13 Cross-sectional structural schematic diagram of the mixing mechanism of the embodiment of the present invention;

[0037] Figure 14 Structural schematic diagram of the bubble mineralization component of the embodiment of the present invention;

[0038] Figure 15 Structural schematic diagram of the connecting pipe in the embodiment of the present invention;

[0039] Figure 16 Structural schematic diagram of the auxiliary component in the embodiment of the present invention;

[0040] Figure 17 Structural schematic diagram of the chemical addition mechanism in the embodiment of the present invention;

[0041] Figure 18 Structural schematic diagram of the foam scraping mechanism in the embodiment of the present invention.

[0042] In the figure: 1, flotation cell; 101, connecting frame; 102, first discharge pipe; 103, collection tank; 104, second discharge pipe; 105, annular grid; 106, connection groove; 107, first gear; 2, mixing mechanism; 21, first driving member; 22, first transmission belt; 23, bubble mineralization assembly; 231, first connecting shaft; 232, first transmission wheel; 233, spiral plate; 234, mineralization disc; 235, second gear; 24, connecting pipe; 241, air inlet pipe; 242, connection cover; 243, feed pipe; 3, auxiliary component; 301, toothed ring; 302, rotating ring; 303, material scraping plate; 4, chemical addition mechanism; 401, chemical addition pipe; 402, valve; 403, distribution pipe; 404, spray head; 5, foam scraping mechanism; 501, second driving member; 502, second transmission belt; 503, second transmission wheel; 504, second connecting shaft; 505, first foam scraping frame; 506, third transmission wheel; 507, third transmission belt; 508, fourth transmission wheel; 509, transmission shaft; 510, fifth transmission wheel; 511, third connecting shaft; 512, second foam scraping frame. Specific embodiments

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0044] An embodiment of a multi-stage mineral flotation device of the present invention, as Figures 1 to 2 shown, it includes a plurality of flotation devices connected in sequence, as Figures 3 to 9 shown, the flotation device includes a flotation cell 1, a mixing mechanism 2 is arranged in the middle of the flotation cell 1, an auxiliary component 3 is arranged inside the flotation cell 1, the position of the auxiliary component 3 corresponds to the position of the mixing mechanism 2, a chemical addition mechanism 4 is arranged inside the flotation cell 1, and a foam scraping mechanism 5 is arranged on the flotation cell 1;

[0045] As Figures 10 to 11 shown, a connecting frame 101 is provided at the top of the flotation cell 1, a first discharge pipe 102 is provided at the bottom on one side of the flotation cell 1, a collecting tank 103 is provided on the flotation cell 1, a second discharge pipe 104 is provided at the bottom of the collecting tank 103, an annular grille 105 is provided inside the flotation cell 1, a connecting groove 106 is opened at the bottom of the flotation cell 1, and a first gear 107 is provided inside the connecting groove 106;

[0046] As Figures 12 to 13 shown, the mixing mechanism 2 includes a first driving member 21, a first transmission belt 22, a bubble mineralization assembly 23 and a connecting pipe 24. A first transmission belt 22 is provided at the output end of the first driving member 21. The first driving member 21 is drivingly connected to the bubble mineralization assembly 23 through the first transmission belt 22. A connecting pipe 24 is provided on the bubble mineralization assembly 23, and the connecting pipe 24 is fixedly installed on the connecting frame 101 by bolts;

[0047] As Figure 3 , Figure 5 , Figure 7 , Figure 9 , Figure 12 and Figure 14 shown, the bubble mineralization assembly 23 includes a first connecting shaft 231, a first transmission wheel 232, a spiral plate 233, a mineralization disc 234 and a second gear 235. A first transmission wheel 232 is provided at one end of the first connecting shaft 231. The first transmission wheel 232 is drivingly connected to the first driving member 21 through the first transmission belt 22. A spiral plate 233 is provided on the first connecting shaft 231. A mineralization disc 234 is provided at the end of the first connecting shaft 231 away from the first transmission wheel 232. A second gear 235 is provided on the side of the mineralization disc 234 away from the spiral plate 233, and the second gear 235 meshes with the first gear 107;

[0048] As Figures 13 to 15 shown, an air inlet pipe 241 is provided on the connecting pipe 24. A connecting cover 242 is provided at one end of the connecting pipe 24. The spiral plate 233 is provided inside the connecting cover 242, and a feed pipe 243 is provided on the connecting cover 242;

[0049] As Figure 5 , Figure 7 , Figure 9 , Figure 11 and Figure 16 shown, the auxiliary assembly 3 includes a toothed ring 301, a rotating ring 302 and a material deflecting plate 303. The toothed ring 301 is drivingly connected to the second gear 235 through the first gear 107. A rotating ring 302 is provided on the toothed ring 301. A material deflecting plate 303 is provided on the rotating ring 302. The number of the material deflecting plates 303 is multiple, and they are circumferentially and arrayedly distributed on the rotating ring 302. The shape of the material deflecting plate 303 is arc-shaped;

[0050] As Figure 3 、 Figure 10 and Figure 17 shown, the chemical addition mechanism 4 includes a chemical addition pipe 401, a valve 402, a distribution pipe 403, and a spray head 404. The chemical addition pipe 401 is fixedly connected to the connecting frame 101 through a hoop. A valve 402 is arranged on the chemical addition pipe 401. One end of the chemical addition pipe 401 is provided with a distribution pipe 403, and a spray head 404 is arranged on the distribution pipe 403;

[0051] As Figure 3 、 Figure 4 、 Figure 10 and Figure 18 shown, the foam scraping mechanism 5 includes a second driving member 501, a second transmission belt 502, a second transmission wheel 503, a second connecting shaft 504, a first foam scraping frame 505, a third transmission wheel 506, a third transmission belt 507, a fourth transmission wheel 508, a transmission shaft 509, a fifth transmission wheel 510, a third connecting shaft 511, and a second foam scraping frame 512. The second driving member 501 is fixedly installed on the flotation cell 1. The output end of the second driving member 501 is provided with a second transmission belt 502. The second driving member 501 is drivingly connected to a second transmission wheel 503 through the second transmission belt 502. A second connecting shaft 504 is arranged in the middle of the second transmission wheel 503. A first foam scraping frame 505 is arranged on the second connecting shaft 504. One end of the second connecting shaft 504 away from the second transmission wheel 503 is provided with a third transmission wheel 506. A third transmission belt 507 is arranged on the third transmission wheel 506. The third transmission wheel 506 is drivingly connected to a fourth transmission wheel 508 through the third transmission belt 507. The fourth transmission wheel 508 is drivingly connected to a transmission shaft 509. The transmission shaft 509 is rotatably connected to one side of the flotation cell 1. The transmission shaft 509 is drivingly connected to a fifth transmission wheel 510. A third connecting shaft 511 is arranged on the fifth transmission wheel 510. The second connecting shaft 504, the fourth transmission wheel 508, and the third connecting shaft 511 are all rotatably connected to the flotation cell 1. A second foam scraping frame 512 is arranged on the third connecting shaft 511.

[0052] The working process is as follows:

[0053] S1. During use, start the first driving member 21 to rotate forward. The first driving member 21 drives the first transmission wheel 232 to rotate forward through the first transmission belt 22. The first transmission wheel 232 drives the spiral plate 233, the mineralization disc 234, and the second gear 235 to rotate through the first connecting shaft 231;

[0054] S2. The pulp enters the connecting cover 242 through the feed pipe 243. The spiral plate 233 rotating with the first connecting shaft 231 pushes the pulp in the connecting cover 242 to the mineralization disc 234. As the mineralization disc 234 rotates, under the action of centrifugal force and the subsequent pushing of the pulp, the pulp flows outward (asFigure 6 as shown);

[0055] S3. Open the valve 402. The reagent enters the distribution pipe 403 through the chemical addition pipe 401, and then enters the flotation cell 1 from the spray nozzles 404 on the distribution pipe 403 and mixes with the pulp. The air flow enters the connecting pipe 24 through the air inlet pipe 241, flows out of the connecting cover 242 along the connecting pipe 24. As the mineralization disc 234 rotates, the relative rotation between the mineralization disc 234 and the annular grid 105 shears the air flow to form bubbles;

[0056] S4. The second gear 235 drives the gear ring 301 to rotate through the first gear 107. The gear ring 301 drives the baffle 303 to rotate through the rotating ring 302, and the rotation direction is opposite to that of the mineralization disc 234. The baffle 303 pushes the pulp flowing through the annular grid 105 outward. When the pulp touches the inner wall of the flotation cell 1, it flows upward. The pulp near the connecting cover 242 is driven by the flowing pulp and flows outward together to form a cycle for flotation of the mineral particles in the pulp (as Figure 7 shown);

[0057] S5. As the usage time increases, when the gangue particles accumulated at the bottom of the flotation cell 1 are more and more, start the first driving member 21 to reverse. The first driving member 21 drives the first transmission wheel 232 to reverse through the first transmission belt 22. The first transmission wheel 232 drives the spiral plate 233, the mineralization disc 234 and the second gear 235 to rotate through the first connecting shaft 231. As the mineralization disc 234 rotates, under the action of centrifugal force and the subsequent pushing of the pulp, the pulp flows outward (as Figure 8 shown);

[0058] S6. The second gear 235 drives the gear ring 301 to rotate through the first gear 107. The gear ring 301 drives the baffle 303 to rotate through the rotating ring 302, and the rotation direction is opposite to that of the mineralization disc 234. The baffle 303 pushes the gangue particles accumulated at the bottom of the flotation cell 1 inward. The relative flow between the pulp pushed outward by the mineralization disc 234 and the gangue particles pushed inward by the baffle 303 loosens the gangue particles accumulated at the bottom of the flotation cell 1 and makes them contact the bubbles moving outward from the mineralization disc 234 with the pulp again for flotation of the mineral particles doped in the gangue particles (as Figure 9 shown);

[0059] Meanwhile, start the second driving member 501. The second driving member 501 drives the second driving wheel 503 through the second transmission belt 502. The second driving wheel 503 drives the first bubble scraping frame 505 and the third driving wheel 506 to rotate through the second connecting shaft 504. The third driving wheel 506 drives the fourth driving wheel 508 to rotate through the third transmission belt 507. The fourth driving wheel 508 drives the fifth driving wheel 510 to rotate through the transmission shaft 509. The fifth driving wheel 510 drives the second bubble scraping frame 512 to rotate through the third connecting shaft 511. The first bubble scraping frame 505 and the second bubble scraping frame 512 scrape the floating mineralized foam into the collection tank 103 and discharge it along the second discharge pipe 104. The tailings enter the feed pipe 243 of the next flotation device from the first discharge pipe 102 for the next-stage flotation.

[0060] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A multi-stage mineral flotation device, comprising a plurality of flotation devices connected in sequence, characterized in that: The flotation device comprises a flotation cell, a mixing mechanism is arranged in the middle of the flotation cell, an auxiliary component is arranged inside the flotation cell, the position of the auxiliary component corresponds to the position of the mixing mechanism, a dosing mechanism is arranged inside the flotation cell, and a bubble scraping mechanism is arranged on the flotation cell; An annular grid is arranged inside the flotation tank, a connecting groove is opened at the bottom of the flotation tank, and a first gear is arranged inside the connecting groove; The mixing mechanism comprises a first driving member, an output end of the first driving member is provided with a first transmission belt, the first driving member is connected to a bubble mineralization component through the first transmission belt, a connecting pipe is provided on the bubble mineralization component, an air intake pipe is provided on the connecting pipe, a connecting cover is provided at one end of the connecting pipe, a spiral plate is provided inside the connecting cover, and a feed pipe is provided on the connecting cover; The bubble mineralization assembly includes a first connecting shaft, a first transmission wheel is arranged at one end of the first connecting shaft, the first transmission wheel is transmission-connected to the first driving member through the first transmission belt, a spiral plate is arranged on the first connecting shaft, a mineralization disk is arranged at one end of the first connecting shaft away from the first transmission wheel, a second gear is arranged at one side of the mineralization disk away from the spiral plate, and the second gear is meshed with the first gear; The auxiliary component comprises a gear ring, a rotating ring is arranged on the gear ring, and a material stripping plate distributed in a circumferential array is arranged on the rotating ring, the material stripping plate is in an arc shape, and the gear ring is connected by a first gear and a second gear. When in use, the first driving member is first started to rotate forward, and the first transmission wheel drives the spiral plate, the mineralization disk and the second gear to rotate through the first connecting shaft, and the mineralization disk and the annular grid rotate relatively, and the second gear drives the gear ring to rotate through the first gear, and the gear ring drives the material stripping plate to rotate through the rotating ring, and the rotation direction is opposite to the rotation direction of the mineralization disk. When more and more gangue particles are accumulated at the bottom of the flotation tank, the first driving member is started to reverse, so that the gangue particles accumulated at the bottom of the flotation tank are loosened and contacted with the bubbles moving outward from the mineralization disk with the slurry again, and the mineral particles doped in the gangue particles are floated.

2. A multi-stage mineral flotation device according to claim 1, characterized in that: A connecting frame is arranged on the top of the flotation tank, a first discharge pipe is arranged on the bottom of one side of the flotation tank, a collecting tank is arranged on the flotation tank, and a second discharge pipe is arranged on the bottom of the collecting tank.

3. A multi-stage mineral flotation device according to claim 1, characterized in that: The dosing mechanism comprises a dosing pipe, a valve is arranged on the dosing pipe, a distribution pipe is arranged at one end of the dosing pipe, and a nozzle is arranged on the distribution pipe.

4. A multi-stage mineral flotation device according to claim 1, characterized in that: The bubble scraping mechanism includes a second driving member, which is fixedly mounted on the flotation tank, a second transmission belt is provided at the output end of the second driving member, the second driving member is connected to the second transmission wheel through the second transmission belt, a second connecting shaft is provided at the middle of the second transmission wheel, a first bubble scraping frame is provided on the second connecting shaft, a third transmission wheel is provided at an end of the second connecting shaft away from the second transmission wheel, a third transmission belt is provided on the third transmission wheel, the third transmission wheel is connected to the fourth transmission wheel through the third transmission belt, the fourth transmission wheel is connected to the transmission shaft, the transmission shaft is rotatably connected to one side of the flotation tank, the transmission shaft is connected to the fifth transmission wheel, the third connecting shaft is provided on the fifth transmission wheel, the second connecting shaft, the fourth transmission wheel and the third connecting shaft are all rotatably connected to the flotation tank, and a second bubble scraping frame is provided on the third connecting shaft.

5. A multi-stage mineral flotation device according to claim 2, characterized in that: The connecting pipe is fixedly mounted on the connecting frame.

6. A multi-stage mineral flotation device according to claim 3, characterized in that: The dosing pipe is fixedly connected to the connecting frame through a clamp.

Images