Pilot-scale open testing machine for powerful mineralization microbubble flotation machine

Abstract

The invention relates to the technical field of production related to coal mining, in particular to a pilot-scale open testing machine for a powerful mineralization microbubble flotation machine, which comprises a shell, a limiting ring and a plurality of spiral guide plates are fixedly mounted on the bottom surface of an inner cavity of the shell, and the spiral guide plates are fixedly mounted on the periphery of the limiting ring at equal angles. A through cavity is formed in the periphery of the limiting ring, flow guide pipes are fixedly installed on the two sides of the periphery of the upper washing pipe, a first cover plate covering the upper end of the limiting ring is fixedly installed on the lower end face of the upper washing pipe, and the lower end face of a first motor box is fixedly connected with the upper end face of a driving rod through an output shaft of the first motor box; a bubble scraping plate is rotationally installed on the upper side of the front end face of the shell, a second motor box is fixedly installed on the outer end face of the shell, and the outer end of the second motor box is rotationally connected with a rotating shaft of the bubble scraping plate through an output shaft and a transmission belt of the second motor box. The coal flotation screening device can conduct flotation screening on coal.

Description

Technical Field

[0001] The invention relates to the technical field of coal mining-related production, in particular to a pilot open testing machine for a strong mineralization microbubble flotation machine. Background Art

[0002] With the large-scale mining of coal resources, they are becoming increasingly scarce, not only for coking coal but also for thermal coal. This necessitates the best possible utilization of mined coal. For lump coal, existing jig and heavy medium washing processes are both effective in recovering and reusing the coal. However, for fine coal, existing flotation processes and equipment are ineffective, especially for difficult-to-float coal, resulting in a significant waste of coal resources.

[0003] In view of the above situation, it is necessary to study new flotation machines. It is urgent to recycle the fine coal, especially the difficult-to-float coal, more efficiently.

[0004] The powerful mineralization micro-bubble flotation machine can not only reduce the ash content of clean coal, but also increase the ash content of tailings, solving the problem that existing flotation machines can only guarantee the performance of one product, effectively ensuring the performance of two products, and can improve the recovery rate of tailings, saving resources and avoiding a large amount of unreasonable waste of coal resources.

[0005] However, when developing new equipment, pilot testing is essential to assess its effectiveness. Only after successful pilot testing can further development proceed. Therefore, before developing a new flotation machine, it is essential for the company to develop a small pilot test device. Only after satisfactory pilot testing can the development of a truly new device have both theoretical and practical significance. Summary of the Invention

[0006] In order to solve the above problems, the present invention provides a pilot open test machine for a strong mineralization microbubble flotation machine.

[0007] The present invention adopts the following technical scheme, a pilot open test machine of a strong mineralized microbubble flotation machine, comprising a shell, a limit ring and a plurality of spiral guide plates are fixedly installed on the bottom surface of the inner cavity of the shell, and the plurality of spiral guide plates are fixedly installed at equal angles on the periphery of the limit ring, a through cavity is opened on the periphery of the limit ring, an upper punch tube is plugged and installed on the upper side of the inner cavity of the shell, guide tubes are fixedly installed on both sides of the periphery of the upper punch tube, a first cover plate covering the upper end of the limit ring is fixedly installed on the lower end surface of the upper punch tube, a first motor box is fixedly installed on the upper end surface of the upper punch tube, a drive rod is rotatably installed in the upper punch tube, and the lower end surface of the first motor box is connected to the drive rod through its output shaft The upper end face of the rod is fixedly connected, and the lower end of the outer periphery of the driving rod is fixedly installed with a first guide plate and a second guide plate that match the inner cavity diameter of the limiting ring, and the first cover plate and the upper end face of the first guide plate are respectively provided with a first guide hole and a second guide hole, and the two sides of the outer periphery of the outer shell are respectively fixedly installed with a feed pipe and a coarse ore discharge pipe that are interconnected with the inner cavity, and the upper end of the front end of the outer shell is inclined, and a concentrate trough is fixedly installed on the front end face of the outer shell, and a bubble scraper is rotatably installed on the upper side of the front end face of the outer shell, and a second motor box is fixedly installed on the outer end face of the outer shell, and the outer end of the second motor box is rotatably connected to the bubble scraper shaft through its output shaft and a transmission belt.

[0008] As a further description of the above technical solution: a liquid guiding rod is fixedly installed on the upper end surface of the shell through a bracket, the liquid guiding rod is arranged on the upper side of the bubble scraper plate, and a plurality of nozzles are fixedly installed on the lower end surface of the liquid guiding rod at equal intervals.

[0009] As a further description of the above technical solution: a concentrate discharge pipe is fixedly installed on the lower end surface of the concentrate trough, an external pipe is plugged and installed on the outer end surface of the concentrate discharge pipe, and a filter is fixedly installed inside the external pipe.

[0010] As a further description of the above technical solution: a limiting socket is provided on the outer end surface of the concentrate discharge pipe, a limiting rod connected to the limiting socket is fixedly installed on the inner end surface of the external pipe, and a threaded ring is rotatably installed on the outer periphery of the external pipe to cooperate with the outer thread of the concentrate discharge pipe.

[0011] As a further description of the above technical solution: the external tube and the concentrate discharge pipe are respectively fixedly and plugged with a first clamping ring and a second clamping ring that fits in with the two end faces of the filter screen; the inner end face of the second clamping ring is fixedly installed with a limiting slide rod that is plugged into the inner cavity of the concentrate discharge pipe; a first spring is fixedly installed between the concentrate discharge pipe and the limiting slide rod.

[0012] As a further description of the above technical solution: a plug-in plate that is plugged into the side wall of the outer shell is fixedly installed on the periphery of the upper punch tube, and connecting seats that are symmetrically arranged up and down are fixedly installed on the periphery of the outer shell and the plug-in plate respectively, and a hydraulic push rod is fixedly installed between the upper and lower connecting seats.

[0013] As a further description of the above technical solution: a sealing ring is fixedly installed on the outside of the inner cavity of the guide tube on both sides, and a fixing seat that matches the clearance of the inner wall of the guide tube is fixedly installed in the guide tube through a connecting rod, and a sealing pin is inserted into the outer end of the fixing seat, and the outer diameter of the sealing pin matches the inner cavity diameter of the sealing ring.

[0014] As a further description of the above technical solution: a limiting column is fixedly installed on the outer end surface of the fixing seat, the sealing pin is plugged and installed on the outer end of the limiting column, and a second spring is fixedly installed between the limiting column and the sealing pin.

[0015] The present invention provides a pilot open test machine for a strong mineralized microbubble flotation machine through improvement. Compared with the prior art, it has the following improvements and advantages:

[0016] First, the present invention utilizes the Venturi effect. When the flotation feed passes through the upper punch pipe at high speed, negative pressure is formed inside it, so that the outside air automatically enters under the action of the pressure difference and mixes with the high-speed flotation feed, achieving a mineralization effect. The mineralized flotation feed enters the interior of the device at high speed, and then the concentrate and tailings are separated at the limit ring. The concentrate enters the concentrate trough and the tailings enter the tailings trough, achieving the effect of flotation screening of the coal.

[0017] Second, a liquid guide rod and a nozzle are set above the concentrate foam layer to apply spray water to the concentrate foam layer, wash the high-ash fine mud entering the concentrate layer again, purify the concentrate again, and further reduce the ash content of the concentrate.

[0018] Thirdly, a hydraulic push rod is provided to cooperate with the upper connecting seat and the plug plate, which can drive the upper punch pipe and the first cover plate, the first guide plate and the second guide plate to move up and down in the device, thereby controlling the flow velocity of the flotation foam layer and improving the flotation efficiency.

[0019] Fourthly, multiple spiral guide plates are arranged on the periphery of the limit ring, which can prevent flotation foam from entering the tailings system at the bottom of the inner cavity of the shell through the diversion effect, thereby improving the flotation recovery rate, purifying the tailings system and increasing the ash content of the tailings.

[0020] To sum up, the present invention utilizes the Venturi effect. The high-speed moving slurry material will form a negative pressure inside it, and the outside air will be introduced into the upper punch pipe, so that the air and the slurry are mixed to achieve the mineralization effect. When the flotation feed after mineralization enters the interior of the device at a high speed, the ore material can be separated into concentrate and tailings. The concentrate enters the concentrate trough and the tailings enter the tailings trough, thereby achieving the effect of flotation screening of the coal. A hydraulic push rod is provided to control the flow velocity of the flotation foam layer separately. A spiral guide plate is provided to prevent the flotation foam from entering the tailings system at the bottom of the inner cavity of the shell, and spray water is applied to the concentrate foam layer above the concentrate foam layer to purify the concentrate again and further reduce the ash content of the concentrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further explained below in conjunction with the accompanying drawings and examples:

[0022] Figure 1 A schematic diagram of the overall external structure from a side perspective provided by an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the overall external structure from another side perspective provided by an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of the internal structure of a housing provided by an embodiment of the present invention;

[0025] Figure 4 A schematic diagram of the internal split structure of the limit ring provided in an embodiment of the present invention;

[0026] Figure 5 A schematic diagram of the internal structure of a concentrate trough provided by an embodiment of the present invention;

[0027] Figure 6 A schematic diagram of the internal split structure of the concentrate discharge pipe provided by an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the internal disassembled structure of the guide tube provided by an embodiment of the present invention.

[0029] In the picture:

[0030] 1. Housing; 101. Feed pipe; 102. Coarse ore discharge pipe; 11. Limiting ring; 12. Through cavity; 13. Spiral guide plate; 14. Upper punch pipe; 141. Guide pipe; 15. Drive rod; 16. First motor box; 17. First cover plate; 171. First guide hole; 18. First guide plate; 181. Second guide hole; 19. Second guide plate;

[0031] 2. Concentrate trough; 21. Scraper plate; 22. Second motor box; 23. Liquid guide rod; 24. Nozzle; 25. Concentrate discharge pipe; 251. Limiting jack; 26. External pipe; 261. Limiting rod; 262. Threaded ring; 27. Filter; 271. First retaining ring; 272. Second retaining ring; 273. Limiting slide; 274. First spring;

[0032] 3. Insert plate; 31. Connecting seat; 32. Hydraulic push rod;

[0033] 4. Sealing ring; 41. Fixed seat; 42. Sealing pin; 43. Limiting column; 44. Second spring. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below with reference to specific diagrams. It should be noted that the embodiments and features in the embodiments of this application can be combined with each other unless they conflict.

[0035] See also Figure 1-Figure 7 , the embodiment of the present invention provides a technical solution: a pilot open test machine of a strong mineralized microbubble flotation machine, comprising a shell 1, a limit ring 11 and a plurality of spiral guide plates 13 are fixedly installed on the bottom surface of the inner cavity of the shell 1, and the plurality of spiral guide plates 13 are fixedly installed at the periphery of the limit ring 11 at equal angles, and a through cavity 12 is opened on the periphery of the limit ring 11, an upper punch pipe 14 is plugged and installed on the upper side of the inner cavity of the shell 1, and guide pipes 141 are fixedly installed on both sides of the periphery of the upper punch pipe 14, a first cover plate 17 covering the upper end of the limit ring 11 is fixedly installed on the lower end surface of the upper punch pipe 14, a first motor box 16 is fixedly installed on the upper end surface of the upper punch pipe 14, a drive rod 15 is rotatably installed in the upper punch pipe 14, and the lower end surface of the first motor box 16 is connected to the drive rod 15 through its output shaft. The upper end face of the rod 15 is fixedly connected, and the lower end of the outer periphery of the driving rod 15 is fixedly installed with a first guide plate 18 and a second guide plate 19 that match the inner cavity diameter of the limiting ring 11, and the upper end faces of the first cover plate 17 and the first guide plate 18 are respectively provided with a first guide hole 171 and a second guide hole 181. The feed pipe 101 and the coarse ore discharge pipe 102 that are interconnected with the inner cavity are fixedly installed on both sides of the outer periphery of the outer shell 1. The upper end of the front end of the outer shell 1 is inclined, and a concentrate trough 2 is fixedly installed on the front end face of the outer shell 1. A bubble scraper 21 is rotatably installed on the upper side of the front end face of the outer shell 1. A second motor box 22 is fixedly installed on the outer end face of the outer shell 1, and the outer end of the second motor box 22 is rotatably connected to the rotating shaft of the bubble scraper 21 through its output shaft and a transmission belt.

[0036] Specifically, when the slurry is introduced into the upper flushing pipe 14 at a high speed through the guide pipe 141 on one side, a negative pressure can be formed in the upper flushing pipe 14 through the Venturi effect, and the guide pipe 141 on the other side can be used to introduce external air into the upper flushing pipe 14, so that the air and the slurry are mixed in the upper flushing pipe 14 to achieve a mineralization effect, and the mineralized flotation feed can be injected into the limit ring 11, and in conjunction with the through cavity 12, the first guide hole 171 and the second guide hole 181, a negative pressure can be formed in the upper flushing pipe 14. , the flotation feed after mineralization is circulated and guided to separate the concentrate and tailings, and the tailings fall into the lower side of the inner cavity of the shell 1, while the concentrate is mixed with the foaming agent and other materials inside the shell 1 and floats on the upper end of the shell 1. The concentrate can be guided into the concentrate trough 2 by the rotating scraper 21 to complete the flotation screening of the coal; wherein, a first motor box 16 is provided, which cooperates with the drive rod 15 to drive the first guide plate 18 and the second guide plate 19 to rotate on the limit ring 11, thereby improving the flotation efficiency.

[0037] In another embodiment provided by the present invention, a liquid guiding rod 23 is fixedly installed on the upper end surface of the housing 1 through a bracket. The liquid guiding rod 23 is arranged on the upper side of the bubble scraping plate 21, and a plurality of nozzles 24 are fixedly installed at equal intervals on the lower end surface of the liquid guiding rod 23.

[0038] Specifically, spray water may be applied to the concentrate foam layer to wash the high-ash fine mud that has entered the concentrate layer again, thereby purifying the concentrate again and further reducing the ash content of the concentrate.

[0039] In another embodiment provided by the present invention, a concentrate discharge pipe 25 is fixedly installed on the lower end surface of the concentrate trough 2, an external pipe 26 is plugged into and installed on the outer end surface of the concentrate discharge pipe 25, a filter screen 27 is fixedly installed in the external pipe 26, a limiting plug hole 251 is provided on the outer end surface of the concentrate discharge pipe 25, a limiting plug rod 261 plugged into the limiting plug hole 251 is fixedly installed on the inner end surface of the external pipe 26, and a threaded ring 262 that cooperates with the outer thread of the concentrate discharge pipe 25 is rotatably installed on the outer periphery of the external pipe 26, a first clamping ring 271 and a second clamping ring 272 that fits with the two end surfaces of the filter screen 27 are respectively fixed and plugged into the external pipe 26 and the concentrate discharge pipe 25, a limiting slide rod 273 plugged into the inner cavity of the concentrate discharge pipe 25 is fixedly installed on the inner end surface of the second clamping ring 272, and a first spring 274 is fixedly installed between the concentrate discharge pipe 25 and the limiting slide rod 273.

[0040] Specifically, a concentrate discharge pipe 25 is provided to lead the concentrate inside the concentrate trough 2 outward, which is convenient for the recovery of the concentrate, and a filter screen 27 is provided in the external pipe 26 to recover the impurities in the concentrate. A first clamping ring 271 and a second clamping ring 272 are provided, which cooperate with the first spring 274 to position the filter screen 27 between the external pipe 26 and the concentrate discharge pipe 25. A threaded ring 262 is provided to connect and fix the external pipe 26 and the concentrate discharge pipe 25 to each other.

[0041] In another embodiment provided by the present invention, a plug plate 3 that is plugged into the side wall of the outer shell 1 is fixedly installed on the periphery of the upper punch tube 14, and connecting seats 31 that are symmetrically arranged upper and lower are fixedly installed on the periphery of the outer shell 1 and the plug plate 3, and a hydraulic push rod 32 is fixedly installed between the upper and lower connecting seats 31.

[0042] Specifically, the upper punch pipe 14 and the first cover plate 17, the first guide plate 18, and the second guide plate 19 can be driven to move up and down in the device, thereby controlling the flow velocity of the flotation foam layer and improving the flotation efficiency.

[0043] In another embodiment provided by the present invention, a sealing ring 4 is fixedly installed on the outside of the inner cavity of the guide tubes 141 on both sides, and a fixing seat 41 that matches the clearance of the inner wall of the guide tube 141 is fixedly installed in the guide tube 141 through a connecting rod. A sealing pin 42 is plugged into the outer end of the fixing seat 41, and the outer diameter of the sealing pin 42 matches the inner cavity diameter of the sealing ring 4. A limiting column 43 is fixedly installed on the outer end surface of the fixing seat 41, and the sealing pin 42 is plugged into the outer end of the limiting column 43, and a second spring 44 is fixedly installed between the limiting column 43 and the sealing pin 42.

[0044] Specifically, when the slurry is injected into the guide tube 141, or the high-speed moving slurry forms a negative pressure in the upper punch tube 14, the pressure on the outside of the sealing ring 4 is greater than the pressure on the inside, so that the sealing pin 42 can be pushed to move in the sealing ring 4, and the guide tubes 141 on both sides are opened, so that the slurry and air can move in the guide tubes 141 on both sides. When the slurry stops moving, the pressure on the inside and outside of the two sealing rings 4 is balanced. At this time, under the action of the second spring 44 restoring the deformation, the sealing pin 42 can be pushed to move outward, so that the sealing pin 42 is reinserted into the sealing ring 4, thereby achieving the effect of sealing the guide tube 141, and preventing impurities inside the shell 1 from moving back into the guide tube 141 through the upper punch tube 14, thereby achieving the effect of protecting the guide tube 141.

[0045] Working principle: open the valve at the feed pipe 101, inject the foaming agent and other materials into the shell 1 through the feed pipe 101, start the external pressure gauge, and inject the slurry into the upper flushing pipe 14 through the guide pipe 141 on one side. Through the Venturi effect, the high-speed moving slurry forms a negative pressure in the upper flushing pipe 14. Cooperating with the guide pipe 141 on the other side, the outside air can be introduced into the upper flushing pipe 14, so that the slurry and air are mixed in the upper flushing pipe 14 to achieve the mineralization effect, and the flotation feed after mineralization in the upper flushing pipe 14 is injected downward into the limit ring 11, and the mineralized flotation feed can be sprayed outward through the outer cavity 12 of the limit ring 11, and the inclined screw is used to adjust the flow rate. The swirling guide plate 13 causes the flotation feed ejected outward to move upward and re-enter the limit ring 11 through the first guide hole 171 and the second guide hole 181. This process is repeated to separate the concentrate and tailings in the flotation feed. The tailings fall to the bottom of the inner cavity of the shell 1, while the concentrate is mixed with the foaming agent and other materials inside the shell 1, so that the concentrate floats at the upper end of the inner cavity of the shell 1. The hydraulic push rod 32 is activated, and in conjunction with the upper connecting seat 31 and the insert plate 3, the upper punch pipe 14 and the first cover plate 17, the first guide plate 18, and the second guide plate 19 can be driven to move up and down in the device, thereby controlling the flow velocity of the flotation foam layer and improving the flotation efficiency.

[0046] When the slurry is continuously injected into the shell 1, the motor inside the second motor box 22 can be started, and the scraper plate 21 can be driven to rotate at the upper end of the inner cavity of the shell 1 through its outer end output shaft and transmission belt. Thus, the concentrate floating on the upper end of the inner cavity of the shell 1 can be scraped up by the rotating scraper plate 21 and guided into the concentrate tank 2 to complete the recovery of the concentrate. When the concentrate is recovered, the nozzle 24 can be turned on to apply spray water to the concentrate foam layer, and the high-ash fine mud entering the concentrate layer can be washed again, so that the concentrate can be purified again and the ash content of the concentrate can be further reduced.

[0047] By opening the valve at the coarse ore discharge pipe 102, the coarse ore sunk at the bottom of the inner cavity of the shell 1 can be led out to the outside, thereby achieving the effect of recovering the coarse ore.

[0048] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A pilot open test machine for a strong mineralized microbubble flotation machine, comprising a housing (1), characterized in that: A limit ring (11) and a plurality of spiral guide plates (13) are fixedly installed on the bottom surface of the inner cavity of the shell (1), and the plurality of spiral guide plates (13) are fixedly installed at equal angles on the periphery of the limit ring (11). A through cavity (12) is provided on the periphery of the limit ring (11). An upper punch tube (14) is plugged and installed on the upper side of the inner cavity of the shell (1), and guide tubes (141) are fixedly installed on both sides of the periphery of the upper punch tube (14). A first cover plate (17) covering the upper end of the limit ring (11) is fixedly installed on the lower end surface of the upper punch tube (14), a first motor box (16) is fixedly installed on the upper end surface of the upper punch tube (14), and a drive rod (15) is rotatably installed in the upper punch tube (14). The lower end surface of the first motor box (16) is fixedly connected to the upper end surface of the drive rod (15) through its output shaft. The drive rod (15) ) are fixedly mounted on the lower end of the outer periphery thereof with a first guide plate (18) and a second guide plate (19) that match the inner cavity diameter of the limiting ring (11), and the upper end surfaces of the first cover plate (17) and the first guide plate (18) are respectively provided with a first guide hole (171) and a second guide hole (181), and the outer sides of the outer periphery of the shell (1) are fixedly mounted with a feed pipe (101) and a coarse ore discharge pipe (102) that are in communication with the inner cavity thereof, respectively, and the upper end of the front end of the shell (1) is arranged in an inclined manner, and the front end surface of the shell (1) is fixedly mounted with a concentrate trough (2), and the upper side of the front end surface of the shell (1) is rotatably mounted with a bubble scraper (21), and the outer end surface of the shell (1) is fixedly mounted with a second motor box (22), and the outer end of the second motor box (22) is rotatably connected to the rotating shaft of the bubble scraper (21) through its output shaft and a transmission belt.

2. The pilot open test machine of a strong mineralization microbubble flotation machine according to claim 1, characterized in that: A liquid guiding rod (23) is fixedly mounted on the upper end surface of the housing (1) via a bracket. The liquid guiding rod (23) is arranged on the upper side of the bubble scraping plate (21), and a plurality of spray heads (24) are fixedly mounted at equal intervals on the lower end surface of the liquid guiding rod (23).

3. The pilot open test machine of a strong mineralization microbubble flotation machine according to claim 1, characterized in that: A concentrate discharge pipe (25) is fixedly installed on the lower end surface of the concentrate trough (2), an external pipe (26) is plugged and installed on the outer end surface of the concentrate discharge pipe (25), and a filter screen (27) is fixedly installed inside the external pipe (26).

4. The pilot open test machine of a strong mineralization microbubble flotation machine according to claim 3, characterized in that: The outer end surface of the concentrate discharge pipe (25) is provided with a limit insertion hole (251), the inner end surface of the external pipe (26) is fixedly mounted with a limit insertion rod (261) plugged into the limit insertion hole (251), and the outer periphery of the external pipe (26) is rotatably mounted with a threaded ring (262) that matches the outer thread of the concentrate discharge pipe (25).

5. The pilot open test machine of a strong mineralization microbubble flotation machine according to claim 3, characterized in that: A first clamping ring (271) and a second clamping ring (272) are fixedly installed and plugged into the external tube (26) and the concentrate discharge pipe (25), respectively. The first clamping ring (271) and the second clamping ring (272) are fitted with the two end faces of the filter screen (27). The inner end face of the second clamping ring (272) is fixedly installed with a limiting slide bar (273) plugged into the inner cavity of the concentrate discharge pipe (25). A first spring (274) is fixedly installed between the concentrate discharge pipe (25) and the limiting slide bar (273).

6. The pilot open test machine of a strong mineralization microbubble flotation machine according to claim 1, characterized in that: A plug plate (3) plugged into the side wall of the housing (1) is fixedly mounted on the periphery of the upper punch tube (14); upper and lower symmetrically arranged connecting seats (31) are fixedly mounted on the periphery of the housing (1) and the plug plate (3), respectively; and a hydraulic push rod (32) is fixedly mounted between the upper and lower connecting seats (31).

7. The pilot open test machine of a strong mineralization microbubble flotation machine according to claim 1, characterized in that: Sealing rings (4) are fixedly installed on the outer sides of the inner cavities of the flow guide tubes (141) on both sides. A fixing seat (41) that is in clearance fit with the inner wall of the flow guide tubes (141) is fixedly installed in the flow guide tubes (141) via a connecting rod. A sealing pin (42) is plugged and installed at the outer end of the fixing seat (41). The outer diameter of the sealing pin (42) matches the inner diameter of the sealing ring (4).

8. The pilot open test machine of a strong mineralization microbubble flotation machine according to claim 7, characterized in that: A limiting column (43) is fixedly mounted on the outer end surface of the fixing seat (41), the sealing pin (42) is plugged and mounted on the outer end of the limiting column (43), and a second spring (44) is fixedly mounted between the limiting column (43) and the sealing pin (42).

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