Bauxite pretreatment device and method

Abstract

The invention provides a bauxite pretreatment device and method. The device comprises a frame body; the crushing mechanism is arranged at the top of the frame body to crush bauxite; the treatment tank is arranged between the frame bodies and is movably connected with the frame bodies, a fine crushing mechanism is arranged in the treatment tank, and the fine crushing mechanism is used for performing fine crushing on bauxite crushed by the crushing mechanism; the adjusting mechanism is arranged in the treatment tank and is used for adjusting the particle size of fine crushing of the fine crushing mechanism; and the screening mechanism is arranged between the treatment tank and the frame body and is used for screening the finely-crushed bauxite. According to the invention, bauxite is firstly crushed into small blocks by the crushing mechanism, then the small blocks are further finely crushed by the fine crushing mechanism in the treatment tank, so that the small blocks meet the requirements of the particle size of bauxite, and meanwhile, the fine crushing mechanism is dynamically adjusted by the adjusting mechanism in the fine crushing and crushing process, so that the small blocks gradually meet the particle size requirements; and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of proppant production devices, and in particular to a bauxite pretreatment device and method. Background Art

[0002] Bauxite is used as the raw material for the production of ceramsite sand proppant. Due to the presence of crystal water in the aluminum oxide inside natural bauxite, as well as a large amount of iron oxide impurities and crystal water, a large amount of water will appear in the bauxite during the processing and production process, affecting the quality and efficiency of fine crushing. Bauxite is mostly in block form during mining. In order to remove the crystal water and iron oxide impurities in the bauxite, it is usually necessary to crush the bauxite to improve the removal efficiency of iron oxide impurities and crystal water.

[0003] In the existing technology, bauxite is usually crushed by a jaw crusher and a hammer crusher. The jaw crusher is first used to crush the larger bauxite into small pieces, and then the small pieces of bauxite are transported to the hammer crusher through a conveying mechanism for secondary crushing. After a certain period of time, the bauxite is screened by a screening device to obtain bauxite that meets the particle size requirements. The bauxite that does not meet the particle size requirements continues to be crushed in the hammer crusher.

[0004] Since bauxite contains a large amount of crystal water and iron oxide impurities, repeated crushing by a hammer crusher can easily cause a large number of pores and cracks to appear inside the bauxite, thereby affecting the production efficiency of bauxite proppants. Therefore, the present invention studies and designs a bauxite pretreatment device and method. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that affect the production efficiency of the granular sand proppant bauxite processing device, thereby providing a bauxite pretreatment device and method.

[0006] In order to solve the above problems, the present invention provides a bauxite pretreatment device, which comprises: frame; A crushing mechanism is provided on the top of the frame to crush the bauxite; A processing tank is provided between the frames and is movably connected to the frames. A fine crushing mechanism is provided in the processing tank, and the fine crushing mechanism is used to finely crush the bauxite after being crushed by the crushing mechanism. An adjusting mechanism is provided in the processing tank, and is used to adjust the particle size of the fine crushing mechanism; A screening mechanism is provided between the processing tank and the frame to screen the finely crushed bauxite; A control device is provided, wherein the control device is connected to the crushing mechanism, the fine crushing mechanism, the screening mechanism and the adjustment mechanism, and respectively performs the crushing, fine crushing and screening of bauxite and adjusts the particle size of the fine crushing of the fine crushing mechanism.

[0007] Preferably, the crushing mechanism is a jaw crusher, the frame is provided with a first mounting plate, the first mounting plate is provided with a mounting opening, and the jaw crusher is arranged in the mounting opening; A collecting barrel is also provided below the installation port, one end of the collecting barrel is connected to the installation port, and the other end of the collecting barrel extends to the top of the processing tank. An electric gate valve is provided on the collecting barrel, and the electric gate valve is connected to the control device.

[0008] Preferably, the processing tank is a horizontal tank, with gaps between the two ends of the processing tank and the two ends of the frame, and gaps between the front and rear sides of the processing tank and the frame and movably connected; a feed cylinder is provided at the top of the processing tank near the collecting cylinder, and the feed cylinder is located at the bottom of the collecting cylinder; a plurality of screening holes are evenly arranged on the side wall of the bottom of the processing tank; A material receiving bin is also provided at the bottom of the frame.

[0009] Preferably, the screening mechanism includes: a first vertical plate and a second vertical plate, the first vertical plate and the second vertical plate are respectively arranged at both ends of the processing tank, and both ends of the first vertical plate and the second vertical plate are respectively connected with an L-shaped bar, one long side of the L-shaped bar is respectively connected to the two ends of the first vertical plate and the second vertical plate, and the short sides of the L-shaped bar are respectively perpendicularly connected to the outer side walls of the processing tank; The two second vertical plates are respectively provided with a rotation shaft close to the frame body, one end of the rotation shaft is respectively perpendicularly connected to the long side of the second vertical plate, and the other end is respectively rotatably connected to the frame body; A second mounting plate is provided at the bottom of one side of the frame close to the first vertical plate, and an electric cylinder is respectively provided on the two first vertical plates close to the frame. The fixed ends of the electric cylinders are respectively rotatably connected to the second mounting plate, and the telescopic ends of the electric cylinders are respectively rotatably connected to the two L-shaped bars of the first vertical plate, and the electric cylinders are connected to the control device.

[0010] Preferably, the crushing mechanism includes: a mounting post, the mounting post being horizontally arranged at the center of the processing tank, and the two ends of the mounting post being rotatably passed through the two end sides of the processing tank, and the centers of the two ends of the mounting post are respectively provided with connecting rods, and the two ends of the connecting rods are respectively rotatably passed through the first vertical plate and the second vertical plate; At least three arc-shaped plates are evenly arranged in the processing tank with the mounting column as the center, the center of the arc-shaped plates coincides with the central axis of the mounting column, and a gap is set between two adjacent arc-shaped plates; a plurality of first crushing teeth are evenly arranged on the inner sidewalls of the processing tank, and a plurality of second crushing teeth are respectively arranged on the side of the arc-shaped plates close to the processing tank; The mounting column is located in the processing tank and has multiple groups of support mechanisms evenly arranged along the axial direction of the mounting column. Each group of support mechanisms has at least three evenly arranged around the central axis of the mounting column. One end of the support mechanism is connected to the outer wall of the mounting column, and the other end is connected to the side of the arc plate facing the mounting column.

[0011] Preferably, a first pulley is provided on the connecting rod of the second vertical plate away from the mounting column, a third mounting plate is provided near one end of the second vertical plate, a first motor is provided on the third mounting plate, the output shaft of the first motor is connected to a second pulley, a belt ring is provided between the second pulley and the first pulley, and the first motor is connected to the control device.

[0012] Preferably, a pair of extensions are provided on both sides of the curved plate, respectively, close to an adjacent one of the curved plates; a first mounting rod is provided between the pair of extensions; a plurality of rotating blocks are evenly arranged on the first mounting rod in a linear array along the length direction of the first mounting rod; one end of the rotating block is rotatably connected to the first mounting rod, and the other end extends toward an adjacent one of the curved plates; A pair of protrusions are provided at one end of the rotating block away from the first mounting rod, a gap is provided between the pair of protrusions, and a second mounting rod is further provided between two adjacent arc-shaped plates. The protrusions of the rotating block between the two adjacent arc-shaped plates are respectively rotatably connected to the second mounting rod.

[0013] Preferably, the supporting mechanism includes: a sliding sleeve and a sliding bar, one end of the sliding sleeve is connected to the outer side wall of the mounting column, the other end of the sliding sleeve extends toward the arc plate along the radial direction of the mounting column, the sliding bar is arranged in the sliding sleeve and is slidably connected to the sliding sleeve, one end of the sliding bar is connected to the arc plate, and the other end is provided with a sliding groove, a sliding rod is provided at the end of the sliding sleeve away from the sliding bar, a spring is provided on the sliding rod, one end of the spring abuts against the end of the sliding groove away from the sliding bar, and the other end abuts against the sliding bar.

[0014] Preferably, the adjusting mechanism is provided with two supporting mechanisms relatively close to both ends of the processing tank; The adjusting mechanism comprises: a mounting ring and a transmission ring, the mounting ring being arranged on the mounting post near the sliding sleeve, and the mounting ring and the mounting post being rotatably connected, an arcuate bar being arranged on the outer side of the mounting ring with the mounting post as the center of the circle corresponding to the sliding bar close thereto, one end of the arcuate bar being connected to the outer side of the mounting ring, and the other end being extended outward in a spiral shape, an arcuate sliding hole being arranged on the arcuate bar, and a limiting rod being arranged on the sliding bar corresponding to each of the arcuate bars, one end of the limiting rod being connected to the sliding bar, and the other end being extended into the corresponding arcuate sliding hole and being slidably connected to the arcuate sliding hole; The transmission ring is respectively provided on one end of the mounting ring close to the sliding sleeve, the transmission ring and the mounting column are spaced apart, and a plurality of teeth are evenly provided on the outer side of the transmission ring; A pair of fixing plates are provided on the outer side wall of the mounting column along the axial direction of the mounting column, a rotating shaft is provided between the pair of fixing plates, the rotating shaft is rotatably connected to the pair of fixing plates respectively, and both ends of the rotating shaft respectively pass through the fixing plates and extend toward the two adjustment mechanisms, and a first gear is provided at each end of the rotating shaft, and the first gear is respectively engaged with the teeth of the corresponding transmission ring; A first bevel gear is also provided on the rotating shaft, and a second motor is provided on the mounting column close to the first bevel gear. The output shaft of the second motor is connected to a second bevel gear, the second bevel gear extends toward the first bevel gear and meshes with the first bevel gear, and the second motor is connected to the control device.

[0015] The present invention also provides a bauxite pretreatment method, which includes the bauxite pretreatment device described in any of the preceding items, comprising the following steps: S1: The larger pieces of bauxite are transported to the crushing mechanism, which first crushes the bauxite into small pieces and then transports them to the processing tank; S2: The control device controls the fine crushing mechanism to further crush and finely crush the small pieces of bauxite, and dynamically adjusts the fine crushing mechanism to meet the fine crushing requirements; S3: The processing tank is assisted in screening by an intermittent start-stop screening mechanism, and the bauxite that meets the particle size requirements is screened out of the processing tank, while the bauxite that does not meet the particle size requirements is further crushed in the processing tank, and the particle size of the crushing mechanism is readjusted so that it gradually meets the particle size requirements.

[0016] The bauxite pretreatment device and method provided by the present invention have the following beneficial effects: 1. The present invention first crushes the bauxite into small pieces through the crushing mechanism and then uses the fine crushing mechanism in the processing tank to further crush and finely crush it so that it meets the particle size requirements of the bauxite. At the same time, the adjustment mechanism dynamically adjusts the fine crushing mechanism during the fine crushing process so that it gradually meets the particle size requirements, thereby improving production efficiency; 2. The present invention also uses a screening mechanism to assist in screening the bauxite in the processing tank during the fine crushing process. When bauxite of different particle sizes is finely crushed, the screening mechanism assists in screening so that bauxite that meets the particle size requirement is screened out of the processing tank, while bauxite that does not meet the particle size requirement is further finely crushed in the processing tank, thereby further improving production efficiency. 3. The present invention also provides that when the distance between the two adjacent curved plates is adjusted relative to the inner wall of the processing tank, when the maximum distance between the curved plates and the processing tank is required, the rotating blocks between the two adjacent curved plates are folded and their extended parts abut against each other, and one end close to the second rotating rod extends outward. At this time, in the structure formed, the gap between the first crushing tooth and the second crushing tooth is large, which can process bauxite with larger particle size, and the length of the extended part of the two rotating blocks is greater than the height of the second crushing tooth. When the mounting column rotates, the rotating blocks can rotate with the bauxite, which can play a role in homogenizing the bauxite inside the processing tank and can move the bauxite with larger particle size to rotate in the processing tank, forming the effect of multiple dividing plates, and the bauxite between each dividing plate is driven to the screening hole as the curved plate rotates relative to the processing tank, and the bauxite that meets the particle size requirement flows out of the processing tank through the screening hole, and the bauxite that does not meet the particle size requirement continues to rotate, so that the bauxite that meets the particle size requirement in each dividing plate is sent out of the processing tank; 4. The present invention also stretches the rotating block between two adjacent curved plates when the minimum distance between the curved plates and the processing tank is required, so that the two first mounting rods and the second mounting rods of the two adjacent curved plates are on the same plane, and the rotating blocks connected thereto are also parallel. In this way, the second crushing teeth can extend relative to the first crushing teeth with the minimum distance, thereby achieving fine crushing of smaller particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the final assembly of the present invention; Figure 2 It is a front view structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the installation of the feed barrel structure of the present invention; Figure 4 This is a schematic diagram of the installation of the first pulley structure of the present invention; Figure 5 This is a schematic diagram of the installation of the sieve hole structure of the present invention; Figure 6This is a schematic diagram of the installation of the curved plate structure of the present invention; Figure 7 This is a schematic diagram of the installation of the protruding structure of the present invention; Figure 8 This is a schematic diagram of the installation of the slideway structure of the present invention; Figure 9 This is a schematic diagram of the installation of the first bevel gear structure of the present invention.

[0018] The reference numerals indicate: 1. Frame; 2. Processing tank; 3. Jaw crusher; 4. First mounting plate; 5. Collecting drum; 6. Electric gate valve; 7. Feed drum; 8. Screening hole; 9. Receiving bin; 10. First vertical plate; 11. Second vertical plate; 12. L-shaped bar; 13. Rotating shaft; 14. Second mounting plate; 15. Electric cylinder; 16. Mounting column; 17. Connecting rod; 18. Curved plate; 19. First crushing tooth; 20. Second crushing tooth; 22. Third mounting plate; 23. First motor; 24. First pulley; 25 , belt loop; 26, extension; 27, first mounting rod; 28, rotating block; 29, protrusion; 30, second mounting rod; 31, sliding sleeve; 32, sliding bar; 33, sliding groove; 34, sliding rod; 35, spring; 36, mounting ring; 37, transmission ring; 38, arc strip; 39, arc-shaped sliding hole; 40, limit rod; 41, teeth; 42, fixing plate; 43, rotating shaft; 44, first gear; 45, first bevel gear; 46, second motor; 47, second bevel gear; 48, warm air duct. DETAILED DESCRIPTION

[0019] like Figure 1-9 As shown, the present invention provides a bauxite pretreatment device, which includes: Frame 1; a crushing mechanism, which is arranged on the top of the frame 1 to crush the bauxite; a processing tank 2, which is arranged between the frames 1 and movably connected to the frames 1, wherein a fine crushing mechanism is arranged in the processing tank 2, and the fine crushing mechanism is used to finely crush the bauxite after being crushed by the crushing mechanism; an adjusting mechanism, which is arranged in the processing tank 2, and the adjusting mechanism is used to adjust the particle size of the fine crushing mechanism; a screening mechanism, which is arranged between the processing tank 2 and the frame 1 to screen the finely crushed bauxite; a control device, wherein the control device is connected to the crushing mechanism, the fine crushing mechanism, the screening mechanism and the adjusting mechanism, and respectively performs crushing, fine crushing and screening of the bauxite and adjusts the particle size of the fine crushing mechanism. Figure 1-9As shown, a bauxite pretreatment device, whose frame 1 serves to install various mechanisms; a belt conveyor is used to transport larger pieces of bauxite to the crushing mechanism, which first crushes the bauxite into small pieces and then uses the fine crushing mechanism in the processing tank 2 to further crush it to obtain bauxite that meets the particle size requirements. At the same time, the regulating mechanism dynamically adjusts the fine crushing mechanism during the fine crushing and pulverizing process, and the regulating mechanism gradually adjusts to meet the particle size requirements, thereby improving production efficiency; the screening mechanism assists in screening the bauxite in the processing tank during the fine crushing process. When faced with bauxite of different particle sizes during the fine crushing process, the screening mechanism assists in screening the bauxite that meets the particle size and screens it out of the processing tank, while the bauxite that does not meet the particle size requirements is further crushed in the processing tank, thereby further improving production efficiency; wherein, the crushing, fine crushing, screening of the bauxite and the adjustment of the particle size of the fine crushing mechanism are respectively controlled by the control device.

[0020] In some embodiments, the crushing mechanism is a jaw crusher 3, a first mounting plate 4 is provided on the frame 1, a mounting port is provided on the first mounting plate 4, and the jaw crusher 3 is provided in the mounting port; a collecting barrel 5 is further provided below the mounting port, one end of the collecting barrel 5 is connected to the mounting port, and the other end of the collecting barrel 5 extends to the top of the processing tank 2, an electric gate valve 6 is provided on the collecting barrel 5, and the electric gate valve 6 is connected to the control device. Figure 1-9 As shown, the crushing mechanism is a jaw crusher 3, which is commercially available. The jaw crusher 3 is connected to a control device so that the control device controls the jaw crusher to crush larger pieces of bauxite into small pieces. The connection between the frame 1 and the first mounting plate 4 can be a bolted connection. The jaw crusher 3 is installed at the mounting port so that the larger pieces of bauxite are crushed by the jaw crusher 3 and then flow to the aggregate barrel 5 through the mounting port. A buffer pad is provided at the connection between the edge of the mounting port and the jaw crusher 3 to reduce the vibration of the jaw crusher 3 at the mounting port. The aggregate barrel 5 is truncated cone-shaped, and its cross-section at one end close to the mounting port is larger, so that the smaller pieces of bauxite after crushing are gathered and fall into the processing tank 2 below for further crushing. The electric gate valve 6 is commercially available and is controlled to be opened or closed by the control device to supply bauxite to be crushed into the processing tank 2.

[0021] In some embodiments, the processing tank 2 is a horizontal tank, with gaps between the two ends of the processing tank 2 and the two ends of the frame 1, and gaps between the front and rear sides of the processing tank 2 and the frame 1 and movably connected; a feed barrel 7 is provided at the top of the processing tank 2 near the collecting barrel 5, and the feed barrel 7 is located at the bottom of the collecting barrel 5; a plurality of screening holes 8 are evenly arranged on the side wall of the bottom of the processing tank 2; and a collecting bin 9 is also provided at the bottom of the frame 1. Figure 1-9As shown, the processing tank 2 is a horizontal tank with a circular radial cross-section. A gap is maintained between the front and rear sides and both ends of the processing tank 2 and the frame 1 to facilitate the movement of the screening mechanism. The front and rear sides of the processing tank 2 and the frame 1 are movably connected; the feeding barrel 7 is installed on the top of the processing tank 2 close to the collecting barrel 5, and its shape is a square cone. The cross-section of one end close to the processing tank 2 is larger than the other end, and the feeding barrel 7 extends to its peripheral side, so that it can catch the bauxite from the collecting barrel 5, and the bauxite splashed to the peripheral side during the addition process can also be caught; at the same time, sufficient gap is reserved between the feeding barrel 7 and the collecting barrel 5 to avoid collision between the feeding barrel 7 and the collecting barrel 5 during the screening process of the screening mechanism. ; Among them, a plurality of sieve holes 8 are evenly arranged on the side wall at the bottom of the processing tank 2, and the aperture of the sieve hole 8 is determined according to the requirements of the proppant. It can be a split design, and a corresponding assembly port is set at the bottom of the processing tank. The assembly port is snap-fitted, bolted and connected to an assembly plate with the same shape as the bottom of the processing tank. A plurality of sieve holes with different apertures are respectively arranged on different assembly plates. The corresponding assembly plates are selected and assembled according to the requirements of the proppant to achieve the aperture of the crushed bauxite meeting the requirements; the collecting bin 9 at the bottom of the frame 1 is used to collect bauxite that meets the particle size requirements, wherein a belt conveyor can be set in the collecting bin 9, and the collected bauxite that meets the particle size requirements is transported to the next step for ball milling by the belt conveyor.

[0022] In some embodiments, the screening mechanism includes: a first vertical plate 10 and a second vertical plate 11, the first vertical plate 10 and the second vertical plate 11 are respectively arranged at the two ends of the processing tank 2, and the two ends of the first vertical plate 10 and the second vertical plate 11 are respectively connected with an L-shaped bar 12, one long side of the L-shaped bar 12 is respectively connected to the two ends of the first vertical plate 10 and the second vertical plate 11, and the short sides of the L-shaped bar 12 are respectively vertically connected to the outer side walls of the processing tank 2; the two second vertical plates 11 are respectively provided with a rotating shaft 13 near the frame 1, one end of the rotating shaft 13 is respectively vertically connected to the long side of the second vertical plate 11, and the other end is respectively rotatably connected to the frame 1; the frame 1 is provided with a second mounting plate 14 at the bottom of one side near the first vertical plate 10, and the two first vertical plates 10 are respectively provided with an electric cylinder 15 near the frame 1, the fixed end of the electric cylinder 15 is respectively rotatably connected to the second mounting plate 14, the telescopic end of the electric cylinder 15 is respectively rotatably connected to the first vertical plate 10, and the electric cylinder 15 is connected to the control device. like Figure 1-9As shown, the first vertical plate 10 and the second vertical plate 11 are relatively installed at the two ends of the processing tank 2, and the two ends of the first vertical plate 10 and the second vertical plate 11 are respectively connected to the L-shaped strips 12, wherein the long side of the L-shaped strips 12 are connected to the two ends of the first vertical plate 10 and the second vertical plate 11, and the short side thereof is vertically connected to the outer wall of the processing tank 2, and one side of the second vertical plate 11 is connected to the frame 1 through a rotating shaft 13, so that the processing tank 2 can be fine-tuned and rotated relative to the frame 1 with the rotating shaft 13 as the center of the circle; and one side of the first vertical plate 10 is connected through two electric cylinders 15, and the electric cylinder 15 is commercially available. The fixed end of the electric cylinder 15 is rotatably connected to the second mounting plate 14 through a rotating seat, and the telescopic end of the electric cylinder 15 is rotatably connected to the two L-shaped strips 12 of the first vertical plate 10 through a rotating seat, and the rotating seat is used for relative adjustment of the electric cylinder and the second mounting plate. When the processing tank 2 is fine-tuned with the rotating shaft 13 as the axis, its electric cylinder The cylinder 15 can fine-tune the angle under the action of the rotating seat to meet the telescopic movement of the electric cylinder 15; the electric cylinder 15 is controlled by the control device to perform synchronous telescopic movement, so that the processing tank 2 is adjusted in angle with the rotating shaft 13 as the center, and the processing tank 2 is relatively shaken up and down, so that the bauxite of different particle sizes inside the processing tank 2 is homogenized and the bauxite that reaches the required particle size is prompted to flow out of the processing tank 2 through the screening hole 8, so as to further crush the bauxite inside that does not meet the particle size requirements; wherein, the screening mechanism can be started in an intermittent manner, and it is started for screening when a certain time is reached, or it can be set according to the distance between the first crushing tooth 19 and the second crushing tooth 20. When the distance is large, the time interval for starting the screening mechanism is large, and when the distance is small, the time interval for starting the screening mechanism is small, so as to screen the bauxite that reaches the particle size inside the processing tank out of the processing tank.

[0023] In some embodiments, the crushing mechanism includes: a mounting post 16, the mounting post 16 is horizontally arranged at the center of the processing tank 2, and the two ends of the mounting post 16 are respectively rotatably passed through the two end sides of the processing tank 2, and the centers of the two ends of the mounting post 16 are respectively provided with connecting rods 17, and the two ends of the connecting rod 17 are respectively rotatably passed through the first vertical plate 10 and the second vertical plate 11; at least three arc plates 18 are evenly arranged in the processing tank 2 with the mounting post 16 as the center, and the center of the arc plate 18 coincides with the central axis of the mounting post 16, and the two adjacent arc plates are respectively rotatably passed through. The gap between the plates 18 is set; the inner wall of the processing tank 2 is evenly provided with a plurality of first crushing teeth 19, and the side of the arc plate 18 close to the processing tank 2 is evenly provided with a plurality of second crushing teeth 20; the mounting column 16 is located in the processing tank 2 and is evenly provided with multiple groups of supporting mechanisms along the axial direction of the mounting column 16, and each group of the supporting mechanisms is evenly provided with at least three supporting mechanisms with the central axis of the mounting column 16 as the center of the circle; one end of the supporting mechanism is connected to the outer wall of the mounting column 16, and the other end is connected to the side of the arc plate 18 facing the mounting column 16. Figure 1-9 As shown, the mounting post 16 is rotatably arranged relative to the processing tank 2, and the two ends of the mounting post 16 extending out of the processing tank 2 are rotatably connected to the first vertical plate 10 and the second vertical plate 11 through the connecting rod 17 installed at the center; at least three arc plates 18 are installed in the processing tank 2 with the mounting post 16 as the center, and the center of the arc plate 18 coincides with the central axis of the mounting post 16. A gap is set between two adjacent arc plates 18 to facilitate the installation of the rotating block 28; a plurality of first crushing teeth 19 are evenly installed on the inner wall of the processing tank 2, and the first crushing teeth 19 are not installed on the inner side of the screening hole 8 relative to the processing tank 2 to avoid bauxite from being crushed in the first Blockage occurs between the crushing teeth 19 and the screening holes 8, wherein the second crushing teeth 20 are arranged on the arc plate 18 near the inner wall of the processing tank 2, and the first crushing teeth 19 and the second crushing teeth 20 are arranged alternately, so that when the arc plate 18 is infinitely close to the inner wall of the processing tank 2, part of the second crushing teeth 20 extends into between the first crushing teeth 19, compressing the fine crushing space so that it can meet the fine crushing requirements of smaller particle size, wherein multiple groups of supporting mechanisms support the arc plate 18 so that it meets the operation of the fine crushing mechanism, so that small pieces of bauxite can be finely crushed through the arc plate 18 and the inner wall of the processing tank 2.

[0024] In some embodiments, the connecting rod 17 of the second vertical plate 11 is provided with a first pulley 24 away from the mounting column 16, and a third mounting plate 22 is provided near one end of the second vertical plate 11. A first motor 23 is provided on the third mounting plate 22. The output shaft of the first motor 23 is connected to a second pulley. A belt ring 25 is provided between the second pulley and the first pulley 24. The first motor 23 is connected to the control device. Figure 1-9As shown, the first motor 23 is commercially available, and the state and parameters of the first motor 23 are controlled by a control device. The output shaft of the first motor 23 and the second pulley can be connected by a coupling via the output shaft of the first motor and a rotating rod, and the rotating rod is further connected to the second pulley, so that the first motor 23 transmits the second pulley. Since the first pulley 24 and the second pulley are connected by a belt ring 25, the first pulley 24 is rotated, driving the connecting rod 17 to rotate, so that the mounting column 16 rotates relative to the processing tank 2. During its rotation, the second crushing tooth 20 rotates relative to the processing tank 2, so that it further crushes and finely grinds the bauxite. At the same time, the second crushing tooth 20 will drive part of the bauxite stuck between the first crushing tooth 19 and the second crushing tooth 20 to rotate.

[0025] In some embodiments, a pair of extensions 26 are provided on both sides of the arc-shaped plate 18, respectively, close to an adjacent arc-shaped plate 18. A first mounting rod 27 is provided between the pair of extensions 26. A plurality of rotating blocks 28 are evenly arranged on the first mounting rod in a linear array along the length direction of the first mounting rod. One end of the rotating block 28 is rotatably connected to the first mounting rod 27, and the other end extends to an adjacent arc-shaped plate 18. A pair of protrusions 29 are provided at one end of the rotating block 28 away from the first mounting rod 27. A gap is provided between the pair of protrusions 29. A second mounting rod 30 is further provided between two adjacent arc-shaped plates 18. The protrusions 29 of the rotating block 28 between two adjacent arc-shaped plates 18 are rotatably connected to the second mounting rod 30. Figure 1-9 As shown, the extension 26 extends from both sides of the arc-shaped plate 18 to an adjacent arc-shaped plate 18, and the center of the extension 26 also overlaps with the center of the mounting post 16. When the arc-shaped plate 18 is adjusted by the adjustment mechanism, the extension 26 between the two adjacent arc-shaped plates 18 acts as a limiter to prevent the two rotating blocks 28 from being further folded. A first mounting rod 27 is installed between each pair of first extensions 26, and the rotating blocks 28 are rotatably connected on the first mounting rod 27 in a linear array. The rotating blocks 28 between the two adjacent arc-shaped plates 18 are rotatably connected via a second mounting rod 30. The pair of protrusions 29 of the rotating block 28 have the same width, and the width of each protrusion 29 is 1 / 4 of the width of the entire rotating block 28. There is a gap between each protrusion 29 and the two sides of the rotating block 28, and the gap is 1 / 8 of the width of the entire rotating block 28. The distance between the two protrusions 29 is 1 / 4 of the width of the entire rotating block 28. In this way, when two adjacent rotating blocks 28 are connected to the second mounting rod 30, the two rotating blocks 28 can be kept tightly engaged when the relative angles are adjusted, which can reduce the bauxite between the arc plate 18 and the processing tank 2 from entering the side where the mounting column 16 is located.

[0026] Specifically, as the distance between the two adjacent curved plates 18 and the inner wall of the processing tank 2 is adjusted, when the maximum distance between the curved plates 18 and the processing tank 2 is required, the rotating block 28 between the two adjacent curved plates 18 is folded and its extension 26 abuts against each other, and the end close to the second rotating rod extends outward. At this time, in the structure formed, the gap between the first crushing tooth 19 and the second crushing tooth 20 is larger, which can process bauxite with a larger particle size, and the length of the folded part of the two rotating blocks 28 is greater than that of the second crushing tooth 2 0, which can rotate with the mounting column 16 and carry the bauxite with it, and can play the role of homogenizing the bauxite inside the treatment tank 2. At the same time, the bauxite with larger particle size can be moved to rotate in the treatment tank 2, forming the effect of multiple dividing plates, and the bauxite between each dividing plate is driven to the screening hole 8 as the arc plate rotates relative to the treatment tank. The bauxite that meets the particle size requirements flows out of the treatment tank 2 through the screening hole 8, and the bauxite that does not meet the particle size requirements continues to rotate, so that the bauxite that meets the particle size requirements in each dividing plate is sent out of the treatment tank 2.

[0027] Specifically, when the minimum distance between the curved plate 18 and the processing tank 2 is required, the rotating block 28 between the two adjacent curved plates 18 is stretched open, so that the two first mounting rods 27 and the second mounting rods 30 of the two adjacent curved plates 18 are on the same plane, and the rotating blocks 28 connected thereto are also parallel. In this way, the second crushing teeth 20 can extend relative to the first crushing teeth 19, and the distance between them is minimized, thereby performing fine crushing of smaller particles.

[0028] Specifically, a plurality of warm air pipes 48 are further provided at one end of the processing tank 2 close to the first vertical plate 10. The warm air pipes 48 are respectively provided close to the mounting column 16 and are respectively provided in the gap between the first vertical plate 10. One end of the warm air pipe 48 passes through the end of the processing tank and extends into the space between the mounting column 16 and the curved plate 18 inside the processing tank 2. The other end of the warm air pipe 48 is respectively connected to the waste heat recovery pipe for recovering the waste heat generated during the production process in the plant and transporting it to the processing tank 2 for use in the bauxite pretreatment device. The warm air entering the space between the curved plate 18 and the mounting column passes through the gap between the rotating blocks between adjacent curved plates to the first crushing teeth and The gap between the second crushing teeth flows, so that warm air is provided during the bauxite crushing process, forming warm air distributed from the radial direction of the mounting column to the inner wall of the processing tank, drying the moisture generated during the bauxite crushing process, and the warm air entering between the first crushing teeth and the second crushing teeth is finally discharged from the tank body through the feed barrel at the top of the processing tank and the screening holes at the bottom; in this process, due to the formation of warm air diffused from the radial direction of the mounting column to the inner wall of the processing tank, the small particles in the crushing process of the first crushing teeth and the second crushing teeth are blown to prevent them from clogging the gap between the rotating block and the arc plate, affecting the adjustment of the arc plate and the rotating block, and avoiding entering the space between the mounting column and the arc plate.

[0029] In some embodiments, the support mechanism includes: a sliding sleeve 31 and a sliding bar 32, one end of the sliding sleeve 31 is connected to the outer wall of the mounting post 16, and the other end of the sliding sleeve 31 extends toward the arc plate 18 along the radial direction of the mounting post 16, the sliding bar 32 is arranged in the sliding sleeve 31 and is slidably connected to the sliding sleeve 31, one end of the sliding bar 32 is connected to the arc plate 18, and the other end is provided with a sliding groove 33, a sliding rod 34 is provided at the end of the sliding sleeve 31 away from the sliding bar 32, and a spring 35 is provided on the sliding rod 34, one end of the spring 35 abuts against the end of the sliding groove 33 away from the sliding bar 32, and the other end abuts against the sliding bar 32. Figure 1-9 As shown, a slide rail that is compatible with the slide bar 32 is set in the slide sleeve 31, so that the slide sleeve 31 is connected in relative sliding manner. When the adjustment mechanism adjusts the distance of the arc plate 18 relative to the inner wall of the processing tank 2, the sliding of the slide bar 32 and the slide sleeve 31 provides support for it, so that the arc plate 18 is kept adjusted in the radial direction of the processing tank 2; the spring 35 is commercially available and is made of spring steel. The spring 35 abuts between the slide groove 33 and the slide bar 32 to support the position between the slide bar 32 and the slide rail, so that when adjusting the distance between the arc plate 18 and the inner wall of the processing tank 2, it is adjusted by multiple groups of support mechanisms.

[0030] The cam 36 is provided with a plurality of support members 32 and a plurality of support members 33. The support members 33 are provided with a plurality of support members 34. The support members 33 are provided with a plurality of support members 34. The support members 33 are provided with a plurality of support members 34. 7 and the mounting post 16 are provided with a gap, and a plurality of teeth 41 are evenly provided on the outer side of the transmission ring 37; a pair of fixed plates 42 are provided on the outer side wall of the mounting post 16 along the axial direction of the mounting post 16, and a rotating shaft 43 is provided between the pair of fixed plates 42, and the rotating shaft 43 is rotatably connected to the pair of fixed plates 42 respectively, and the two ends of the rotating shaft 43 respectively pass through the fixed plates 42 and extend toward the two adjustment mechanisms, and a first gear 44 is provided at both ends of the rotating shaft 43 respectively, and the first gear 44 is respectively engaged with the corresponding teeth 41 of the transmission ring 37; a first bevel gear 45 is also provided on the rotating shaft 43, and a second motor 46 is provided on the mounting post 16 near the first bevel gear 45, and the output shaft of the second motor 46 is connected to the second bevel gear 47, and the second bevel gear 47 extends toward the first bevel gear 45 and engages with the first bevel gear 45, and the second motor 46 is connected to the control device. Figure 1-9As shown, the adjustment mechanism is installed at the support mechanism at both ends of the processing tank 2, wherein the installation direction of the support mechanism at one end of the processing tank 2 is opposite to the installation direction of the support mechanism of other groups, so as to avoid interference with it when installing the adjustment mechanism; the second motor 46 is commercially available, and the connection between the output shaft of the second motor 46 and the second bevel gear 47 can be achieved by connecting the output shaft of the second motor 46 to a rotating rod through a coupling, and then connecting the second bevel gear 47 through the rotating rod, the second bevel gear 47 meshes with the first bevel gear 45, and the second bevel gear 47 transmits the first bevel gear 45 so that the rotating shaft connected to a pair of fixed plates 42 can rotate, and then the first gear 44 is connected at both ends of the rotating shaft 43 to the transmission ring 37 meshing with the teeth 41 for transmission. Since the transmission ring 37 is installed on the mounting ring 36 facing away from the two ends of the processing tank 2 On one side of the mounting ring 36, the mounting ring 36 is rotatably connected relative to the mounting column 16, thereby realizing transmission of the mounting ring 36; since an arc-shaped sliding hole 39 is provided in the arc strip 38 on the outer side of the mounting ring 36 for sliding connection with the limit rod 40, the limit rod 40 is connected to the slide bar 32, and through the rotation of the mounting ring 36 relative to the mounting column 16, the two sets of support mechanisms near the two ends realize the synchronous transmission of each slide bar 32 and the slide sleeve 31 through the transmission of the rotating shaft, and realize the sliding of the slide bar 32 and the slide sleeve 31 of the two support mechanisms at both ends. In this way, the distance between the arc plate 18 and the inner wall of the processing tank 2 can be synchronously adjusted through the adjustment mechanism, so as to maintain the stability of the arc plate 18 during the adjustment process, and the amplitude of the distance adjustment for each arc plate 18 during the adjustment process is consistent, thereby promoting the stability of the arc plate 18.

[0031] The present invention also provides a bauxite pretreatment method, comprising the bauxite pretreatment device described in any of the preceding items, comprising the following steps: S1: The larger pieces of bauxite are transported to the crushing mechanism, which first crushes the bauxite into small pieces and then transports them to the processing tank 2; S2: The control device controls the fine crushing mechanism to further crush and finely crush the small pieces of bauxite, and dynamically adjusts the fine crushing mechanism to meet the fine crushing requirements; S3: The processing tank 2 is assisted in screening by an intermittent start-stop screening mechanism, and the bauxite that meets the particle size requirements is screened out of the processing tank, while the bauxite that does not meet the particle size requirements is further crushed in the processing tank, and the particle size of the crushing mechanism is readjusted so that it gradually meets the particle size requirements.

[0032] Specifically, a belt conveyor is used to transport larger pieces of bauxite to the crushing mechanism. The crushing mechanism first crushes the bauxite into small pieces and then uses the fine crushing mechanism in the processing tank 2 to further crush it so that it meets the particle size requirements of bauxite. Among them, the first pulley 24 is rotated to drive the connecting rod 17 to rotate, so that the mounting column 16 rotates relative to the processing tank 2. During its rotation, the second crushing tooth 20 rotates relative to the processing tank 2, so that it further crushes the bauxite. At the same time, the second crushing tooth 20 will drive part of the bauxite stuck between the first crushing tooth 19 and the second crushing tooth 20 to rotate; the adjusting mechanism dynamically adjusts the fine crushing mechanism during the fine crushing process so that it gradually meets the particle size requirements to improve production efficiency.

[0033] Specifically, as the distance between the two adjacent curved plates 18 and the inner wall of the processing tank 2 is adjusted, when the maximum distance between the curved plates 18 and the processing tank 2 is required, the rotating block 28 between the two adjacent curved plates 18 is folded and its extension 26 abuts against each other, and the end close to the second rotating rod extends outward. At this time, in the structure formed, the gap between the first crushing tooth 19 and the second crushing tooth 20 is larger, which can process bauxite with a larger particle size, and the length of the folded part of the two rotating blocks 28 is greater than that of the second crushing tooth 2 0, which can rotate with the mounting column 16 and carry the bauxite with it, and can play the role of homogenizing the bauxite inside the treatment tank 2. At the same time, the bauxite with larger particle size can be moved to rotate in the treatment tank 2, forming the effect of multiple dividing plates, and the bauxite between each dividing plate is driven to the screening hole 8 as the arc plate rotates relative to the treatment tank. The bauxite that meets the particle size requirements flows out of the treatment tank 2 through the screening hole 8, and the bauxite that does not meet the particle size requirements continues to rotate, so that the bauxite that meets the particle size requirements in each dividing plate is sent out of the treatment tank 2.

[0034] Specifically, when the minimum distance between the curved plate 18 and the processing tank 2 is required, the rotating block 28 between the two adjacent curved plates 18 is stretched open, so that the two first mounting rods 27 and the second mounting rods 30 of the two adjacent curved plates 18 are on the same plane, and the rotating blocks 28 connected thereto are also parallel. In this way, the second crushing teeth 20 can extend relative to the first crushing teeth 19, and the distance between them is minimized, thereby performing fine crushing of smaller particles.

[0035] Specifically, the screening mechanism assists in screening the bauxite in the processing tank during the fine crushing process. When bauxite of different particle sizes is screened during the fine crushing process, the screening mechanism is assisted in adjusting so that the bauxite that meets the particle size requirement is screened out of the processing tank, while the bauxite that does not meet the particle size requirement is further crushed in the processing tank. The control device controls the electric cylinder 15 to perform synchronous telescopic movement, so that the processing tank 2 is adjusted in angle with the rotating shaft 13 as the center, so that the processing tank 2 is relatively shaken up and down, so that the bauxite of different particle sizes inside the processing tank 2 is evenly distributed. The quality and quality of the bauxite that meets the particle size requirements flow out of the processing tank 2 through the screening hole 8, so as to facilitate the fine crushing of the bauxite inside that does not meet the particle size requirements. The screening mechanism can be started in an intermittent manner and started for screening when a certain time is reached, or it can be set according to the distance between the first crushing tooth 19 and the second crushing tooth 20. When the distance is large, the time interval for starting the screening mechanism is large, and when the distance is small, the time interval for starting the screening mechanism is small, so as to screen the bauxite that meets the particle size requirements inside the processing tank out of the processing tank.

[0036] Specifically, a slide rail compatible with the slide bar 32 is set in the slide sleeve 31, so that the slide sleeve 31 is connected in relative sliding manner. When the adjustment mechanism is adjusted to change the distance of the arc plate 18 relative to the inner wall of the processing tank 2, the sliding of the slide bar 32 and the slide sleeve 31 provides support for it. Through the rotation of the mounting ring 36 relative to the mounting column 16, the two groups of support mechanisms near the two ends realize the synchronous transmission of each slide bar 32 and the slide sleeve 31 through the transmission of the rotating shaft, thereby providing power for the sliding of the slide bars 32 and the slide sleeve 31 of the two support mechanisms located at both ends. In this way, the distance of its arc plate 18 relative to the inner wall of the processing tank 2 can be synchronously adjusted through the adjustment mechanism.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A bauxite pretreatment device, characterized in that: include: frame; A crushing mechanism is provided on the top of the frame to crush the bauxite; A processing tank is provided between the frames and is movably connected to the frames. A fine crushing mechanism is provided in the processing tank, and the fine crushing mechanism is used to finely crush the bauxite after being crushed by the crushing mechanism. An adjusting mechanism is provided in the processing tank, and is used to adjust the particle size of the fine crushing mechanism; A screening mechanism is provided between the processing tank and the frame to screen the finely crushed bauxite; A control device is provided, wherein the control device is connected to the crushing mechanism, the fine crushing mechanism, the screening mechanism and the adjustment mechanism, and respectively performs the crushing, fine crushing and screening of bauxite and adjusts the particle size of the fine crushing of the fine crushing mechanism.

2. The bauxite pretreatment device according to claim 1, characterized in that: The crushing mechanism is a jaw crusher, the frame is provided with a first mounting plate, the first mounting plate is provided with a mounting opening, and the jaw crusher is arranged in the mounting opening; A collecting barrel is also provided below the installation port, one end of the collecting barrel is connected to the installation port, and the other end of the collecting barrel extends to the top of the processing tank. An electric gate valve is provided on the collecting barrel, and the electric gate valve is connected to the control device.

3. The bauxite pretreatment device according to claim 2, characterized in that: The processing tank is a horizontal tank, with gaps between the two ends of the processing tank and the two ends of the frame, and gaps between the front and rear sides of the processing tank and the frame and movably connected; a feed barrel is provided on the top of the processing tank near the collecting barrel, and the feed barrel is located at the bottom of the collecting barrel; a plurality of screening holes are evenly arranged on the side wall of the bottom of the processing tank; A material receiving bin is also provided at the bottom of the frame.

4. The bauxite pretreatment device according to claim 1, characterized in that: The screening mechanism includes: a first vertical plate and a second vertical plate, wherein the first vertical plate and the second vertical plate are respectively arranged at both ends of the processing tank, and both ends of the first vertical plate and the second vertical plate are respectively connected to an L-shaped bar, one long side of the L-shaped bar is respectively connected to the two ends of the first vertical plate and the second vertical plate, and the short sides of the L-shaped bar are respectively perpendicularly connected to the outer side wall of the processing tank; The two second vertical plates are respectively provided with a rotation shaft close to the frame body, one end of the rotation shaft is respectively perpendicularly connected to the long side of the second vertical plate, and the other end is respectively rotatably connected to the frame body; A second mounting plate is provided at the bottom of one side of the frame close to the first vertical plate, and an electric cylinder is respectively provided on the two first vertical plates close to the frame. The fixed ends of the electric cylinders are respectively rotatably connected to the second mounting plate, and the telescopic ends of the electric cylinders are respectively rotatably connected to the two L-shaped bars of the first vertical plate, and the electric cylinders are connected to the control device.

5. The bauxite pretreatment device according to claim 4, characterized in that: The crushing mechanism includes: a mounting column, the mounting column is horizontally arranged at the center of the processing tank, and the two ends of the mounting column are rotatably passed through the two end sides of the processing tank, and the centers of the two ends of the mounting column are respectively provided with connecting rods, and the two ends of the connecting rods are rotatably passed through the first vertical plate and the second vertical plate; At least three arc-shaped plates are evenly arranged in the processing tank with the mounting column as the center, the center of the arc-shaped plates coincides with the central axis of the mounting column, and a gap is set between two adjacent arc-shaped plates; a plurality of first crushing teeth are evenly arranged on the inner sidewalls of the processing tank, and a plurality of second crushing teeth are respectively arranged on the side of the arc-shaped plates close to the processing tank; The mounting column is located in the processing tank and has multiple groups of support mechanisms evenly arranged along the axial direction of the mounting column. Each group of support mechanisms has at least three evenly arranged around the central axis of the mounting column. One end of the support mechanism is connected to the outer wall of the mounting column, and the other end is connected to the side of the arc plate facing the mounting column.

6. The bauxite pretreatment device according to claim 5, characterized in that: A first pulley is provided on the connecting rod of the second vertical plate away from the mounting column, a third mounting plate is provided near one end of the second vertical plate, a first motor is provided on the third mounting plate, an output shaft of the first motor is connected to a second pulley, a belt ring is provided between the second pulley and the first pulley, and the first motor is connected to the control device.

7. The bauxite pretreatment device according to claim 5, characterized in that: A pair of extensions are provided on both sides of the arc-shaped plate, close to an adjacent arc-shaped plate, a first mounting rod is provided between the pair of extensions, a plurality of rotating blocks are evenly arranged on the first mounting rod in a linear array along the length direction of the first mounting rod, one end of the rotating block is rotatably connected to the first mounting rod, and the other end extends to an adjacent arc-shaped plate; A pair of protrusions are provided at one end of the rotating block away from the first mounting rod, a gap is provided between the pair of protrusions, and a second mounting rod is further provided between two adjacent arc-shaped plates. The protrusions of the rotating block between the two adjacent arc-shaped plates are respectively rotatably connected to the second mounting rod.

8. The bauxite pretreatment device according to claim 5, characterized in that: The support mechanism includes: a sliding sleeve and a sliding bar, one end of the sliding sleeve is connected to the outer wall of the mounting column, and the other end of the sliding sleeve extends toward the arc plate along the radial direction of the mounting column, the sliding bar is arranged in the sliding sleeve and slidably connected to the sliding sleeve, one end of the sliding bar is connected to the arc plate, and the other end is provided with a sliding groove, a sliding rod is provided in the sliding sleeve at an end away from the sliding bar, and a spring is provided on the sliding rod, one end of the spring abuts against the end of the sliding groove away from the sliding bar, and the other end abuts against the sliding bar.

9. The bauxite pretreatment device according to claim 8, characterized in that: The adjustment mechanism is provided with two support mechanisms relatively close to the two ends of the processing tank; The adjusting mechanism comprises: a mounting ring and a transmission ring, the mounting ring being arranged on the mounting post near the sliding sleeve, and the mounting ring and the mounting post being rotatably connected, an arcuate bar being arranged on the outer side of the mounting ring with the mounting post as the center of the circle corresponding to the sliding bar close thereto, one end of the arcuate bar being connected to the outer side of the mounting ring, and the other end being extended outward in a spiral shape, an arcuate sliding hole being arranged on the arcuate bar, and a limiting rod being arranged on the sliding bar corresponding to each of the arcuate bars, one end of the limiting rod being connected to the sliding bar, and the other end being extended into the corresponding arcuate sliding hole and being slidably connected to the arcuate sliding hole; The transmission ring is respectively provided on one end of the mounting ring close to the sliding sleeve, the transmission ring and the mounting column are spaced apart, and a plurality of teeth are evenly provided on the outer side of the transmission ring; A pair of fixing plates are provided on the outer side wall of the mounting column along the axial direction of the mounting column, a rotating shaft is provided between the pair of fixing plates, the rotating shaft is rotatably connected to the pair of fixing plates respectively, and both ends of the rotating shaft respectively pass through the fixing plates and extend toward the two adjustment mechanisms, and a first gear is provided at each end of the rotating shaft, and the first gear is respectively engaged with the teeth of the corresponding transmission ring; A first bevel gear is also provided on the rotating shaft, and a second motor is provided on the mounting column close to the first bevel gear. The output shaft of the second motor is connected to a second bevel gear, the second bevel gear extends toward the first bevel gear and meshes with the first bevel gear, and the second motor is connected to the control device.

10. A bauxite pretreatment method, characterized in that: The bauxite pretreatment device according to any one of claims 1 to 9 comprises the following steps: S1: The larger pieces of bauxite are transported to the crushing mechanism, which first crushes the bauxite into small pieces and then transports them to the processing tank; S2: The control device controls the fine crushing mechanism to further crush and finely crush the small pieces of bauxite, and dynamically adjusts the fine crushing mechanism to meet the fine crushing requirements; S3: The processing tank is assisted in screening by an intermittent start-stop screening mechanism, and the bauxite that meets the particle size requirements is screened out of the processing tank, while the bauxite that does not meet the particle size requirements is further crushed in the processing tank, and the particle size of the crushing mechanism is readjusted so that it gradually meets the particle size requirements.

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