Flotation tailing purification device

Abstract

The invention belongs to the technical field of coal mine equipment, and particularly relates to a flotation tailing purification device which comprises a treatment box and a box body, and a filter hopper is rotationally connected into the treatment box. The technical means that the treatment box is matched with the filter hopper is adopted, the filter hopper is rotated, coal mine particles in a mixture penetrate through the filter hopper through centrifugal force difference, coal slime gets close to the inner wall of the filter hopper, an oil film gathers towards the center of the filter hopper, the separated oil film is sucked through the oil collecting hopper, and the annular air blowing pipe set is impacted through directional air flow, so that the oil film is separated. The coal slime adhering to the inner wall of the filter hopper is rapidly stripped, the scraper blade conducts deep cleaning on the residual coal slime through relative movement with the rotary filter hopper, the risk of screen pasting of the equipment is reduced through the synergistic effect of the annular air blowing pipe set and the scraper blade, and then the overall filtering effect of the equipment is conveniently guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of coal mine equipment technology, specifically a flotation tailings purification device. Background Technology

[0002] Tailings are purified by flotation because tailings, as a by-product of coal washing, have fine particles and contain a large amount of impurities such as gangue and clay. Direct use of tailings is inefficient and highly polluting. Flotation can utilize the differences in the surface physicochemical properties of coal and impurities, and use reagents to allow coal particles to attach bubbles to separate impurities. Ultimately, tailings that were originally unusable are transformed into tailings slurry with high combustible content, which can be used as fuel or processing raw material and is easy to store and transport.

[0003] Patent application CN221157159U discloses a device for removing oil film from the surface of flotation tailings slurry. The device includes a film removal mechanism comprising a rotary motor, a rotating rod fixedly connected to the lower end of the motor, a turntable fixedly connected to the lower end of the rotating rod, a connecting column fixedly connected to the lower end of the turntable, and a rotating column fixedly connected to the lower end of the connecting column. A sliding rod is provided at the lower end of the rotating column, and a scraper mechanism is fixedly connected to the outer wall of the lower end of the rotating column. A filtering mechanism is provided at the lower end of the film removal mechanism, including a filter screen. A partition is fixedly connected to the upper end of the filter screen, and a sliding rod is fixedly connected to the upper end of the partition. A base is fixedly connected to the middle of the upper end of the filter screen, and a support column is fixedly connected to the middle of the upper end of the filter screen. This invention solves the problem that existing tailings slurry oil film removal devices cannot effectively separate the oil film from the coal and perform scraping operations.

[0004] Although the aforementioned patent document can effectively separate the oil film from the coal, because the patent does not remove the scraped material from the filter screen surface, the scraped mixture continues to adhere to the filter screen surface. As the amount of adhesion increases, the filter screen is easily clogged, ultimately reducing the effective filtration area of ​​the filter screen and affecting the overall filtration effect. Summary of the Invention

[0005] The purpose of this invention is to provide a flotation tailings purification device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a flotation tailings purification device, comprising a processing box and a housing, wherein a filter bucket is rotatably connected inside the processing box, and by rotating the filter bucket, the difference in centrifugal force causes coal particles in the mixture to pass through the filter bucket, coal sludge to approach the inner wall of the filter bucket, and oil film to gather towards the center of the filter bucket. An oil collecting pipe is fixedly connected to the top of the processing box, and the oil collecting pipe extends to the center of the inner cavity of the filter bucket. An annular air blowing pipe assembly for cleaning coal sludge from the inner wall of the filter bucket is installed on the surface of the oil collecting pipe, and a scraper that abuts against the inner wall of the filter bucket is installed on the surface of the oil collecting pipe. When the filter bucket rotates, the scraper slides relative to the inner wall of the filter bucket, thereby scraping off the residual coal sludge that was not cleaned by the annular air blowing pipe assembly.

[0007] Preferably, an oil collecting hopper is fixedly connected to the bottom end of the oil collecting pipe, and a negative pressure fan is externally connected to the top end of the oil collecting pipe.

[0008] Preferably, a drive assembly for rotating the filter bucket is provided on one side of the processing box. The drive assembly includes a servo motor, a first drive wheel, a second drive wheel, and a drive belt. The servo motor is fixedly connected to one side of the processing box, the first drive wheel is fixedly connected to the output end of the servo motor, and the second drive wheel is fixedly connected to the surface of the filter bucket. The first drive wheel and the second drive wheel are connected by a drive belt.

[0009] Preferably, a discharge pipe is fixedly connected to the bottom of the filter bucket, and the discharge pipe is rotatably connected to the inner cavity of the processing box.

[0010] Preferably, an inclined plate is provided at the bottom of the inner wall of the processing box, and a discharge pipe corresponding to the inclined plate is provided on the other side of the processing box.

[0011] Preferably, a screening hopper is rotatably connected inside the box, a variable frequency motor for driving the screening hopper to rotate is fixedly connected to one side of the box, an oil suction pipe for sucking up oil film is fixedly connected to the top of the box, a plurality of air nozzles for cleaning coal slime on the inner wall of the screening hopper are installed on the surface of the oil suction pipe, and a scraper that abuts against the inner wall of the screening hopper is fixedly connected to the surface of the oil suction pipe.

[0012] Preferably, the surface of the oil suction pipe is provided with an adjustment mechanism for adjusting the angle of the air nozzle assembly. The adjustment mechanism includes an annular fixed sleeve fixedly connected to the surface of the oil suction pipe. Several air nozzle assemblies are connected to the surface of the annular fixed sleeve through a rotary joint. The surface of the annular fixed sleeve is hinged with a connecting rod assembly equal in number to the annular fixed sleeve. The connecting rod assembly is fixedly connected to the air nozzle assembly. Adjacent connecting rods in the connecting rod assembly are fixedly connected. The surface of the annular fixed sleeve is slidably connected with an annular cylinder that abuts against the connecting rod assembly. The bottom connecting rod assembly rotates around the hinge point under the pushing force of the annular cylinder, thereby driving all connecting rod assemblies to rotate synchronously.

[0013] Preferably, an electric actuator is fixedly connected to one side of the housing, and the output end of the electric actuator is fixedly connected to the annular cylinder.

[0014] Preferably, a torque sensor is provided on the surface of the screening hopper, and the variable frequency motor and electric push rod are electrically connected to the torque sensor.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. This invention employs a combination of a processing box and a filter bucket. The rotating filter bucket uses centrifugal force differences to cause coal particles in the mixture to pass through the filter bucket, coal sludge to approach the inner wall of the filter bucket, and oil film to gather towards the center of the filter bucket. The separated oil film is then sucked up by the oil collection bucket. The annular air blowing pipe assembly uses directional airflow to quickly peel off the coal sludge adhering to the inner wall of the filter bucket. The scraper, through its relative movement with the rotating filter bucket, deeply cleans the residual coal sludge. The synergistic effect of the annular air blowing pipe assembly and the scraper helps reduce the risk of screen clogging, thereby ensuring the overall filtration effect of the equipment.

[0017] 2. This invention employs a combination of torque sensor and air nozzle assembly. When coal slime adheres heavily to the inner wall of the screening hopper, the torque sensor increases the speed of the variable frequency motor to enhance centrifugal force and assist in slime removal. The angle of the air nozzle assembly is steepened by the electric actuator to enhance the impact force, thus facilitating the cleaning of coal slime. Conversely, when the torque is too low, the torque sensor sends an electrical signal to the variable frequency motor and electric actuator. The variable frequency motor reduces its speed, and the electric actuator adjusts the angle of the air nozzle assembly to a smaller value, thereby enabling the equipment to better adapt to different working conditions. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the present invention;

[0019] Figure 2 For the present invention Figure 1 The enlarged view at point A is shown below;

[0020] Figure 3 This is a cross-sectional view of the internal structure of the processing box of the present invention;

[0021] Figure 4 This is a schematic diagram of the overall structure of the second embodiment of the present invention;

[0022] Figure 5 This is a three-dimensional view of the oil suction pipe and its associated structures of the present invention;

[0023] Figure 6 For the present invention Figure 5 The enlarged view of section B shown.

[0024] In the picture:

[0025] 1. Processing box; 11. Filter bucket; 12. Servo motor; 13. First drive wheel; 14. Second drive wheel; 15. Drive belt;

[0026] 2. Oil collecting pipe; 21. Fixing rod; 22. Mounting plate; 23. Scraper; 24. Oil collecting hopper; 25. Annular air blowing pipe assembly;

[0027] 3. Discharge pipe;

[0028] 4. Discharge pipe;

[0029] 5. Housing; 51. Screening hopper; 52. Variable frequency motor; 53. First pulley; 54. Second pulley; 55. Belt; 56. Coal mine discharge pipe; 57. Coal slime discharge pipe; 58. Torque sensor;

[0030] 6. Oil suction pipe; 61. Oil film enrichment hopper; 62. Air nozzle assembly; 621. Annular fixing sleeve; 63. Connecting rod assembly; 64. Limiting groove; 65. Annular cylinder; 66. Electric actuator; 67. Scraper. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1:

[0033] like Figures 1 to 3 As shown, this embodiment of the invention provides a flotation tailings purification device, including a processing box 1. A film removal mechanism is provided inside the processing box 1. The film removal mechanism includes a filter bucket 11 rotatably connected inside the processing box 1. The aperture of the filter holes in the filter bucket 11 matches the coal particles. An inclined plate is provided at the bottom of the inner wall of the processing box 1. A discharge pipe 3 corresponding to the inclined plate is provided on one side of the processing box 1. A discharge pipe 4 is fixedly connected to the bottom of the filter bucket 11. The discharge pipe 4 is rotatably connected to the inner cavity of the processing box 1. A drive assembly for driving the filter bucket 11 to rotate is provided on one side of the processing box 1. The drive assembly includes a servo motor 12 fixedly connected to one side of the processing box 1. A first transmission wheel 13 is fixedly connected to the output end of the servo motor 12. A second transmission wheel 14 is fixedly connected to the outer surface of the filter bucket 11. The first transmission wheel 13 and the second transmission wheel 14 are connected by a transmission belt 15.

[0034] Furthermore, the bottom of the filter hopper 11 is rounded to facilitate faster coal slurry discharge.

[0035] An oil collecting pipe 2 is located at the center of the inner cavity of the filter bucket 11. The oil collecting pipe 2 is fixedly connected to the top of the processing box 1, and an oil collecting hopper 24 is fixedly connected to the bottom end of the oil collecting pipe 2. A negative pressure fan is connected to the top end of the oil collecting pipe 2, which provides a negative pressure of 0.02-0.04 MPa to facilitate the suction effect of the oil collecting pipe 2, thereby facilitating the efficient intake and discharge of the central oil film. An annular air blowing pipe assembly 25 is installed on the surface of the oil collecting pipe 2 and within the inner cavity of the filter bucket 11. The annular air blowing pipe assembly 25 uses airflow to impact the inner wall of the filter bucket 11 to peel off the adhering coal slime and prevent coal from being washed away. Mud clogs the filter screen holes. The annular air blowing pipe assembly 25 is connected to an external air blower. The air blower is used to provide compressed air to the annular air blowing pipe assembly 25. The inclination angle of the air blowing pipe in the annular air blowing pipe assembly 25 is 45 degrees downward. A fixing rod 21 is fixedly connected to the surface of the oil collecting pipe 2 and located at the top of the annular air blowing pipe assembly 25. A mounting plate 22 is fixedly connected to the end of the fixing rod 21 away from the oil collecting pipe 2. A scraper 23 is installed on one side of the mounting plate 22, which abuts against the inner wall of the filter bucket 11. When the filter bucket 11 rotates, the fixed scraper 23 slides relative to the inner wall, scraping off the residual coal mud that was not cleaned by the air blowing pipe.

[0036] Furthermore, due to the different centrifugal forces generated by the rotation of the filter bucket 11, the coal particles, coal slime, and oil film in the tailings slurry are separated into layers. The coal particles are subjected to the greatest centrifugal force and are thrown towards the inner wall of the filter bucket 11, passing through the filter mesh and falling to the bottom of the treatment box 1. The coal slime is subjected to a moderate centrifugal force, with some adhering to the inner wall of the filter bucket 11 and some suspended inside the filter bucket 11. The oil film is subjected to the least centrifugal force and gathers towards the center of the filter bucket 11. After stratification, the oil film is sucked away through the oil collection pipe 2. The annular air blowing pipe group 25 facilitates the blowing of air onto the coal slime adhering to the inner wall of the filter bucket 11, causing the high-speed airflow to impact the inner wall of the filter bucket 11 and blow off the adhering coal slime. The scraper 23 facilitates further processing, which helps to ensure the filtration effect of the equipment.

[0037] Furthermore, the scraper 23 is preferably made of polyurethane, because polyurethane has strong wear resistance and is suitable for long-term relative motion, thus making it easier to meet actual usage requirements.

[0038] Working principle: After a comprehensive inspection of all components of the equipment, and if no errors are found, the mixture to be processed is put into the processing tank 1 and falls into the filter hopper 11 by gravity. The servo motor 12 is driven, and the servo motor 12 drives the filter hopper 11 to rotate through the first transmission wheel 13, the transmission belt 15, and the second transmission wheel 14. This causes the mixture in the filter hopper 11, which includes coal particles, coal slurry, and oil film, to undergo radial stratification under centrifugal force. The coal particles are subjected to the greatest centrifugal force and are thrown against the inner wall of the filter hopper 11, passing through the filter mesh and falling to the bottom of the processing tank 1, and then discharged through the discharge pipe 4.

[0039] The coal sludge is subjected to moderate centrifugal force, with some adhering to the inner wall of the filter bucket 11 and some suspended inside the filter bucket 11. The oil film is subjected to the least centrifugal force and gathers towards the center of the filter bucket 11. Since the oil collecting pipe 2 is fixed to the top of the treatment box 1 and the oil collecting hopper 24 at the bottom is directly opposite the center of the filter bucket 11, the oil collecting pipe 2 generates a suction effect, drawing the oil film gathered in the center into the oil collecting pipe 2 through the oil collecting hopper 24 and finally out of the treatment box 1. By introducing compressed air into the annular air blowing pipe group 25, the high-speed airflow impacts the inner wall of the filter bucket 11, blowing off the adhering coal sludge and guiding it to move towards the bottom of the filter bucket 11. When the filter bucket 11 rotates, it drives the scraper 23 to clean the inner wall of the filter bucket 11, scraping off the residual coal sludge that the annular air blowing pipe group 25 has not cleaned, further ensuring that there is no coal sludge accumulation on the inner wall. The blown-off and scraped coal sludge is discharged through the discharge pipe 3.

[0040] Example 2:

[0041] like Figures 4 to 6 As shown, a flotation tailings purification device includes a housing 5, a screening hopper 51 rotatably connected inside the housing 5, a variable frequency motor 52 fixedly connected to one side of the housing 5, a first pulley 53 fixedly connected to the output end of the variable frequency motor 52, a second pulley 54 fixedly connected to the surface of the screening hopper 51, and the first pulley 53 and the second pulley 54 being connected by a belt 55 for transmission. A guide plate is provided at the bottom of the inner wall of the housing 5, and a coal mine discharge pipe 56 corresponding to the guide plate is provided on one side of the housing 5. A coal slime discharge pipe 57 is fixedly connected to the bottom of the screening hopper 51, wherein the bottom of the screening hopper 51 adopts a rounded corner transition, thereby facilitating the accelerated discharge of coal slime.

[0042] An oil suction pipe 6 is fixedly connected to the top of the housing 5. The oil suction end of the oil suction pipe 6 extends into the center of the inner cavity of the screening hopper 51. The oil suction end of the oil suction pipe 6, located in the center of the inner cavity of the screening hopper 51, is connected to the oil film enrichment hopper 61. The oil discharge end of the oil suction pipe 6 is externally connected to a negative pressure fan. The negative pressure fan provides a negative pressure of 0.02-0.04MPa, which facilitates the suction effect of the oil suction pipe 6, thereby facilitating the efficient suction of the central oil film into the oil suction pipe 6 and its discharge.

[0043] The surface of the oil suction pipe 6 is provided with an air blowing assembly for blowing air onto the coal slime inside the screening hopper 51. The air blowing assembly includes an annular fixed sleeve 621 fixedly connected to the surface of the oil suction pipe 6. The surface of the annular fixed sleeve 621 is provided with a plurality of air blowing nozzle groups 62. The plurality of air blowing nozzle groups 62 are all connected to the surface of the annular fixed sleeve 621 through flexible air pipes or rotary joints. The air blowing nozzle groups 62 are connected to an external air source. The surface of the annular fixed sleeve 621 is hinged with a connecting rod group 63 with the same number as the air blowing nozzle group 62. The side of each air blowing nozzle away from its end is fixedly connected to the connecting rod in the corresponding connecting rod group 63. Adjacent connecting rods are fixedly connected by a fixing plate. The surface of the annular fixed sleeve 621 is provided with a limiting groove 64 for each connecting rod to rotate. The surface of the annular fixed sleeve 621 is slidably connected with an annular cylinder 65 that abuts against the connecting rod group 63. An electric actuator is fixedly connected to one side of the housing 5. 66. The output end of the electric actuator 66 is fixedly connected to the annular cylinder 65. A torque sensor 58 is installed on the surface of the coal slurry discharge pipe 57. The variable frequency motor 52 and the electric actuator 66 are electrically connected to the torque sensor 58. The torque of the coal slurry discharge pipe 57 is the torque of the screening hopper 51. The magnitude of the torque is positively correlated with the coal slurry adhesion strength and the degree of blockage: the greater the torque, the more serious the coal slurry adhesion on the inner wall of the screening hopper 51. When the torque is too large, the torque sensor 58 sends an electrical signal to the variable frequency motor 52 and the electric actuator 66. The variable frequency motor 52 increases the speed to enhance the centrifugal force to assist in slurry discharge. The electric actuator 66 adjusts the angle of the air nozzle assembly 62 to enhance the impact force. Conversely, when the torque is too small, the torque sensor 58 sends an electrical signal to the variable frequency motor 52 and the electric actuator 66. The variable frequency motor 52 reduces the speed, and the electric actuator 66 adjusts the angle of the air nozzle assembly 62 to be smaller.

[0044] Furthermore, the axial sliding of the annular cylinder 65 causes the connecting rod assembly 63 to rotate around the hinge point, and the connecting rod assembly 63 changes the tilt angle of the air nozzle assembly 62. The design of the limiting groove 64 restricts the swing range of the connecting rod, thereby avoiding excessive adjustment of the air nozzle angle, and thus ensuring that the air blowing direction of the air nozzle is always in the inner wall cleaning area of ​​the screening hopper 51.

[0045] A scraper 67 is fixedly connected to the surface of the oil suction pipe 6, which abuts against the inner wall of the screening hopper 51.

[0046] Working principle: After a comprehensive inspection of all components of the equipment, and if everything is in order, the mixture to be processed is put into the box 5. The variable frequency motor 52 drives the screening hopper 51 to rotate. Through rotation, centrifugal force is used to cause the mixture, including coal particles, coal slurry, and oil film, to undergo radial stratification. The coal particles are subjected to the greatest centrifugal force and are thrown against the inner wall of the screening hopper 51. After passing through the filter mesh, they fall to the bottom of the box 5 and are discharged through the coal slurry discharge pipe 57. The coal slurry is subjected to a moderate centrifugal force. Some of it adheres to the inner wall of the screening hopper 51, and some is suspended inside the screening hopper 51. The oil film is subjected to the least centrifugal force and gathers towards the center of the screening hopper 51 and is discharged through the oil collection pipe 2. The external air source introduces compressed air through the air blowing nozzle group 62, which causes the high-speed airflow to impact the inner wall of the screening hopper 51 to blow off the coal slurry. The remaining coal slurry is removed by the scraper plate 67.

[0047] Torque sensor 58 is used to monitor the torque of screening hopper 51 in real time. Since the torque is positively correlated with the adhesion strength and clogging degree of coal slime, the larger the torque, the more severe the coal slime adhesion on the inner wall of screening hopper 51. When the torque is too large, the torque sensor 58 sends an electrical signal to the variable frequency motor 52 and the electric push rod 66. The variable frequency motor 52 increases the speed to enhance the centrifugal force to assist in sludge discharge, and the electric push rod 66 adjusts the angle of the air nozzle assembly 62 to enhance the impact force. Conversely, when the torque is too small, the torque sensor 58 sends an electrical signal to the variable frequency motor 52 and the electric push rod 66. The variable frequency motor 52 decreases the speed, and the electric push rod 66 adjusts the angle of the air nozzle assembly 62 to make the equipment adaptable to different working conditions (the working principle of torque sensor 58 is existing technology and will not be described in detail here).

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flotation tailings purification device, comprising a processing tank (1) and a housing (5), characterized in that: The processing box (1) is rotatably connected to a filter bucket (11), and the top of the processing box (1) is fixedly connected to an oil collecting pipe (2). The oil collecting pipe (2) extends to the center of the inner cavity of the filter bucket (11). An annular air blowing pipe assembly (25) for cleaning coal sludge on the inner wall of the filter bucket (11) is installed on the surface of the oil collecting pipe (2). A scraper (23) that abuts against the inner wall of the filter bucket (11) is installed on the surface of the oil collecting pipe (2). When the filter bucket (11) rotates, the scraper (23) slides relative to the inner wall of the filter bucket (11), thereby scraping off the residual coal sludge that was not cleaned by the annular air blowing pipe assembly (25).

2. The flotation tailings purification device according to claim 1, characterized in that: The bottom end of the oil collecting pipe (2) is fixedly connected to an oil collecting hopper (24), and the top end of the oil collecting pipe (2) is externally connected to a negative pressure fan.

3. The flotation tailings purification device according to claim 1, characterized in that: A drive assembly for rotating the filter bucket (11) is provided on one side of the processing box (1). The drive assembly includes a servo motor (12), a first transmission wheel (13), a second transmission wheel (14), and a transmission belt (2). The servo motor (12) is fixedly connected to one side of the processing box (1). The first transmission wheel (13) is fixedly connected to the output end of the servo motor (12). The second transmission wheel (14) is fixedly connected to the surface of the filter bucket (11). The first transmission wheel (13) and the second transmission wheel (14) are connected by the transmission belt (2).

4. The flotation tailings purification device according to claim 1, characterized in that: The bottom of the filter bucket (11) is fixedly connected to the discharge pipe (4), and the discharge pipe (4) is rotatably connected to the inner cavity of the processing box (1).

5. The flotation tailings purification device according to claim 1, characterized in that: An inclined plate is provided at the bottom of the inner wall of the processing box (1), and a discharge pipe (3) corresponding to the inclined plate is provided on the other side of the processing box (1).

6. The flotation tailings purification device according to claim 1, characterized in that: The box (5) is rotatably connected to a screening hopper (51). A variable frequency motor (52) for driving the screening hopper (51) to rotate is fixedly connected to one side of the box (5). An oil suction pipe (6) for sucking up oil film is fixedly connected to the top of the box (5). Several air nozzles (62) for cleaning coal sludge on the inner wall of the screening hopper (51) are installed on the surface of the oil suction pipe (6). A scraper (67) that abuts against the inner wall of the screening hopper (51) is fixedly connected to the surface of the oil suction pipe (6).

7. The flotation tailings purification device according to claim 6, characterized in that: The surface of the oil suction pipe (6) is provided with an adjustment mechanism for adjusting the angle of the air nozzle assembly (62). The adjustment mechanism includes an annular fixed sleeve (621) fixedly connected to the surface of the oil suction pipe (6). Several air nozzle assemblies (62) are connected to the surface of the annular fixed sleeve (621) through a rotary joint. The surface of the annular fixed sleeve (621) is hinged with a connecting rod assembly (63) with the same number as the annular fixed sleeve (621). The connecting rod assembly (63) is fixedly connected to the air nozzle assembly (62). Adjacent connecting rods in the connecting rod assembly (63) are fixedly connected. The surface of the annular fixed sleeve (621) is slidably connected with an annular cylinder (65) that abuts against the connecting rod assembly (63). The bottom connecting rod assembly (63) is rotated around the hinge point under the pushing force of the annular cylinder (65) through the annular cylinder (65), thereby driving all connecting rod assemblies (63) to rotate synchronously.

8. The flotation tailings purification device according to claim 7, characterized in that: An electric actuator (66) is fixedly connected to one side of the housing (5), and the output end of the electric actuator (66) is fixedly connected to the annular cylinder (65).

9. The flotation tailings purification device according to claim 8, characterized in that: A torque sensor (58) is provided on the surface of the screening hopper (51), and the variable frequency motor (52) and the electric push rod (66) are electrically connected to the torque sensor (58).

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