Settling device for aluminum oxide production

Abstract

The invention relates to the technical field of aluminum oxide production, and discloses a sedimentation device for aluminum oxide production, which comprises a sedimentation tank, a sludge discharge pipe is arranged on the bottom surface of the sedimentation tank, a sludge discharge mechanism matched with the sludge discharge pipe is arranged in the sedimentation tank, and a plurality of sedimentation plates are rotatably arranged in the sedimentation tank through a rotating shaft. The settling plates are arranged in the settling tank, the rotating shaft between the settling plates and the settling tank is sleeved with a torsional spring, a first shifting plate, a second shifting plate and a third shifting plate are sequentially arranged on the settling plates in an abutting and sliding mode, and an L-shaped rod for driving the first shifting plate to slide is arranged on the first shifting plate. Meanwhile, the sedimentation area is increased, the sedimentation efficiency is improved, the first stirring plate, the second stirring plate and the third stirring plate are arranged, particles on the sedimentation plate are swept into a lower-layer solution, meanwhile, the conveying assembly discharges a flocculating agent from liquid outlet holes in the sedimentation plate, the flocculating agent is mixed with the particles, the sedimentation speed is increased, and therefore the sedimentation efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of alumina production, and specifically refers to a sedimentation device for alumina production. Background Art

[0002] When producing alumina, first, pulp preparation is carried out, and then digestion is carried out to form a mixture of sodium aluminate solution and impurities. The content of iron oxide in the impurities is large, and the appearance is red, also called red mud. At this time, the impurities in the mixture need to be separated. At this time, the mixture is introduced into a sedimentation tank. Through sedimentation, the red mud and the sodium aluminate solution can be separated from solid to liquid. The separated sodium aluminate solution is washed and calcined to obtain dense alumina particles.

[0003] In alumina production, for large-particle red mud, its own gravity is large, so the sedimentation speed is fast and it is easier to settle to the bottom. For small-particle red mud, its own gravity is small and the sedimentation speed is slow, so it takes a long time to settle to the bottom. In order to improve the sedimentation efficiency, a flocculant is generally added to the sedimentation tank to make the small-particle red mud aggregate together to form a flocculent mass, increase its own gravity, and thus accelerate the sinking. Since the bottom area of the sedimentation tank itself is fixed and the sedimentation efficiency is fixed, it takes a long time for the red mud to settle. When adding the flocculant, the addition amount and the mixing degree cannot be guaranteed. Due to the inability to be evenly mixed with the solution, some particles have a fast sedimentation speed, and some particles have an unchanged sedimentation speed, resulting in only a limited increase in the overall sedimentation efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above difficulties and provide a sedimentation device for alumina production.

[0005] To solve the above technical problems, the technical solution provided by the present invention is: a sedimentation device for alumina production, including a sedimentation tank. A sludge discharge pipe is provided at the bottom of the sedimentation tank. A sludge discharge mechanism cooperating with the sludge discharge pipe is provided in the sedimentation tank. A plurality of sedimentation plates are rotatably provided in the sedimentation tank. A torsion spring is provided between the sedimentation plate and the sedimentation tank. A first baffle plate, a second baffle plate and a third baffle plate are sequentially arranged in contact and sliding on the sedimentation plate. An L-shaped rod for driving the first baffle plate to slide is provided on the first baffle plate. A first return spring is provided between the L-shaped rod and the sedimentation tank. A sliding mechanism for controlling whether the second baffle plate and the third baffle plate slide is provided on the first baffle plate, the second baffle plate and the third baffle plate. A moving mechanism for driving the L-shaped rod to slide is provided on one side of the sedimentation tank. A conveying assembly for conveying a flocculant and communicating with the sedimentation plate is provided on the other side of the sedimentation tank. A solution is input into the sedimentation tank. Particles fall on the sedimentation plate under the action of gravity. When the weight of the particles reaches a certain weight, the sedimentation plate rotates against the torsion of the torsion spring and inclines downward. The moving mechanism drives the L-shaped rod to move. The L-shaped rod drives the first baffle plate to move. The first baffle plate drives the second baffle plate and the third baffle plate to move, and sweeps the sediment deposited on the sedimentation plate down in equal proportion. At the same time, the conveying assembly conveys the flocculant to the periphery of the sedimentation plate to combine with the falling sediment.

[0006] As an improvement, the sliding mechanism includes a first housing and a second housing respectively arranged on the third baffle plate and the second baffle plate. A moving block is provided on the first baffle plate. The second housing can be inserted into the first housing, and the moving block can be inserted into the second housing. Clamping plates arranged corresponding to both sides are slidably provided in both the first housing and the second housing. A second spring is provided between the clamping plates and the first housing and the second housing. A sliding column is provided at one end of the clamping plate. A first limiting column is provided at one end of the sliding column. A trigger rod is slidably provided on the side surfaces of the first housing and the second housing. An arc-shaped block cooperating with the first limiting column is provided at one end of the trigger rod. A groove cooperating with the sliding column is provided on the arc-shaped block. A baffle plate cooperating with the trigger rod is provided in the sedimentation tank.

[0007] As an improvement, the moving mechanism includes an arc-shaped slider slidably arranged on the sedimentation tank corresponding to the sedimentation plate. A first gear is rotatably provided on the arc-shaped slider. A second gear meshing with the first gear is provided on the sedimentation tank. The sliding track of the arc-shaped slider is an arc track where the first gear meshes with the second gear. A rack cooperating with the first gear is provided at one end of the L-shaped rod. After the arc-shaped slider drives the first gear to slide, it meshes with the rack. A rotating mechanism for driving the second gear to rotate is provided on the sedimentation tank. A driving mechanism for driving the first gear to slide and then mesh with the rack is provided on the sedimentation tank. The driving mechanism is driven by the rotation of the sedimentation plate.

[0008] As an improvement, the driving mechanism includes a connecting rod rotatably arranged on the first gear. The other end of the connecting rod is rotatably connected to the second gear. Both ends of the settling plate are provided with rotating shafts penetrating through the settling tank. One end of the rotating shaft is provided with a second limiting post. A torsion spring is sleeved on the rotating shaft and is located between the second limiting post and the settling tank. A top block is arranged on the second limiting post. A driving plate is slidably arranged on the settling tank. An extension rod abutted against the connecting rod is arranged on the driving plate. When the settling plate rotates to drive the top block, the top block drives the driving plate to move upward, the extension rod drives the connecting rod to rotate, and the connecting rod drives the first gear to slide along the arc direction.

[0009] As an improvement, a fixing rod is arranged on the second limiting post. A clamping block is slidably arranged on the settling tank. A second return spring is arranged between the clamping block and the settling tank. One end of the clamping block is provided with an inclined surface cooperating with the fixing rod. The other end of the clamping block is provided with a moving rod. A limiting rod is arranged on the second limiting post. A limiting plate cooperating with the limiting rod is arranged on the settling tank. When the first gear rotates to drive the rack to move, one end of the rack abuts against the moving rod and drives the moving rod to move. The moving rod drives the clamping block to move, separating the fixing rod from the clamping block, and the settling plate resets.

[0010] As an improvement, the conveying assembly includes a connecting pipe and a liquid inlet pipe. The connecting pipe passes through the settling tank and the second limiting post on one side and is communicated with the inside of the settling plate. The settling plate is provided with a liquid outlet hole communicated with the connecting pipe. The liquid inlet pipe is rotatably connected to the connecting pipe. A control mechanism for controlling liquid outlet is arranged on the settling plate.

[0011] As an improvement, the control mechanism includes an inserting post and a pressing block. The inserting post is movably inserted into the settling plate. The settling plate is provided with a slot cooperating with the inserting post and the slot is communicated with the liquid outlet hole. A third return spring is arranged between the inserting post and the slot. The inserting post is provided with a through hole. The pressing block is fixedly arranged on the inserting post. The top surface of the pressing block is arc-shaped. When the first dial plate, the second dial plate and the third dial plate move to drive the pressing block to move downward, the pressing block drives the inserting post to move downward so that the through hole is located in the liquid outlet hole, and the liquid flows out from the liquid outlet hole.

[0012] The advantages of the present invention compared with the prior art are as follows: 1. By arranging a plurality of settling plates in the settling tank, the solution in the settling tank is divided into upper and lower parts by the settling plates. The particles in the lower-layer solution directly fall to the bottom, and the particles in the upper-layer solution fall on the settling plates, reducing the falling distance of the particles, enabling the particles to fall on the settling plates and the bottom surface of the settling tank, increasing the settling area, and thus improving the settling efficiency; 2. By arranging the first dial plate, the second dial plate and the third dial plate, the particles falling on the settling plates are divided into three parts. When the weight of the particles on any one settling plate reaches a certain degree, the settling plate inclines. The driving mechanism drives the first gear to slide along the arc direction, making the first gear mesh with the rack. The rotating mechanism drives the first gear to rotate, the first gear drives the rack to move, thereby driving the first dial plate to move. The first dial plate drives the second dial plate and the third dial plate to move through the sliding mechanism, so as to sweep the particles on the settling plate into the lower-layer solution; 3. When the first baffle plate, the second baffle plate, and the third baffle plate sweep the particles down, the conveying assembly discharges the flocculant from the liquid outlet holes on the settling plate, mixes it with the particles, enables the particles to adsorb each other to form flocculent clusters, improves the sedimentation speed, and thus improves the sedimentation efficiency. The setting of the conveying assembly can not only further improve the sedimentation efficiency, but also prevent the particles from dispersing when falling. The first baffle plate, the second baffle plate, and the third baffle plate are provided to divide the particles falling on the settling plate into three parts, which can prevent too many particles from falling at one time, resulting in some particles escaping without flocculation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a three-dimensional view of a sedimentation device for alumina production according to the present invention Figure 1 .

[0014] Figure 2 is a three-dimensional view of a sedimentation device for alumina production according to the present invention Figure 2 .

[0015] Figure 3 is a sectional view of a sedimentation device for alumina production according to the present invention.

[0016] Figure 4 is a sedimentation device for alumina production according to the present invention Figure 3 Enlarged view at A in

[0017] Figure 5 is a schematic structural view of a sedimentation device for alumina production according to the present invention.

[0018] Figure 6 is a schematic view of the sliding mechanism of a sedimentation device for alumina production according to the present invention Figure 1 .

[0019] Figure 7 is a schematic view of the sliding mechanism of a sedimentation device for alumina production according to the present invention Figure 2 .

[0020] Figure 8 is a sectional view of the sliding mechanism of a sedimentation device for alumina production according to the present invention.

[0021] Figure 9 is a schematic view of the moving mechanism of a sedimentation device for alumina production according to the present invention.

[0022] Figure 10 is a partial exploded view of the moving mechanism of a sedimentation device for alumina production according to the present invention.

[0023] Figure 11 is a partial schematic view of the moving mechanism of a sedimentation device for alumina production according to the present invention.

[0024] Figure 12It is a schematic diagram of the driving mechanism of a sedimentation device for alumina production according to the present invention.

[0025] Figure 13 It is an exploded view of the conveying component of a sedimentation device for alumina production according to the present invention.

[0026] As shown in the figure: 1. Sedimentation tank; 11. Sludge discharge pipe; 12. Sludge discharge mechanism; 13. Screw; 2. Sedimentation plate; 21. Torsion spring; 3. L-shaped rod; 31. First baffle; 32. Second baffle; 33. Third baffle; 34. First return spring; 35. Partition plate; 36. Scraper; 4. Sliding mechanism; 41. First housing; 42. Second housing; 43. Moving block; 44. Clamping plate; 45. Baffle; 46. Slide post; 47. First limit post; 48. Arc-shaped block; 49. Trigger rod; 5. Moving mechanism; 51. Arc-shaped slider; 52. First gear; 53. Rack; 54. Second gear; 55. Rotating mechanism; 551. Rotating shaft; 552. Driving wheel; 553. Driven wheel; 554. Transmission belt; 6. Conveying component; 61. Liquid outlet hole; 62. Connecting pipe; 63. Liquid inlet pipe; 7. Driving mechanism; 71. Connecting rod; 72. Rotating shaft; 73. Second limit post; 731. Fixed rod; 732. Clamping block; 733. Moving rod; 734. Limit rod; 735. Limit plate; 74. Top block; 75. Driving plate; 76. Extension rod; 8. Control mechanism; 81. Insertion post; 82. Through hole; 83. Pressing block. Detailed implementation manners

[0027] The present invention will be further described in detail below with reference to the accompanying drawings.

[0028] Combined with the attached Figure 1 、attached Figure 2 、attached Figure 3 and attached Figure 5 shown, a sedimentation device for alumina production includes a sedimentation tank 1, the bottom surface of the sedimentation tank 1 is inclined, a sludge discharge pipe 11 is provided on the bottom surface of the sedimentation tank 1, an electromagnetic valve is provided on the sludge discharge pipe 11, a sludge discharge mechanism 12 cooperating with the sludge discharge pipe 11 is provided in the sedimentation tank 1, the sludge discharge mechanism 12 includes a screw 13 rotatably provided in the sedimentation tank 1, a motor for driving the screw 13 to rotate is provided outside the sedimentation tank 1, a plurality of sedimentation plates 2 are rotatably provided in the sedimentation tank 1, a torsion spring 21 is provided between the sedimentation plate 2 and the sedimentation tank 1, a first baffle 31, a second baffle 32 and a third baffle 33 are sequentially abutted and slid on the sedimentation plate 2, an L-shaped rod 3 for driving the first baffle 31 to slide is provided on the first baffle 31, a first return spring 34 is provided between the L-shaped rod 3 and the sedimentation tank 1, a sliding mechanism 4 for controlling whether the second baffle 32 and the third baffle 33 slide is provided on the first baffle 31, the second baffle 32 and the third baffle 33, a moving mechanism 5 for driving the L-shaped rod 3 to slide is provided on one side of the sedimentation tank 1, and a conveying component 6 for conveying flocculant communicated with the sedimentation plate 2 is provided on the other side of the sedimentation tank 1; The first baffle 31, the second baffle 32 and the third baffle 33 all include a partition plate 35. A scraping plate 36 is movably inserted into the upper bottom surface of the partition plate 35. A first spring is provided between the scraping plate 36 and the partition plate 35. The end of the scraping plate 36 is of an inclined surface structure. The first baffle 31 is provided with a fixing column, and the second baffle 32 and the third baffle 33 are movably inserted on the fixing column. Through the arrangement of the partition plate 35, the scraping plate 36 and the first spring, the rotation of the settling plate 2 can be adapted, so that the scraping plate 36 always fits the settling plate 2; The solution is input into the settling tank 1. The particles fall on the settling plate 2 under the action of gravity. When the weight of the particles reaches a certain weight, the settling plate 2 rotates against the torsion of the torsion spring 21 and inclines downward. The moving mechanism 5 drives the L-shaped rod 3 to move. The L-shaped rod 3 drives the first baffle 31 to move. The first baffle 31 drives the second baffle 32 and the third baffle 33 to move, and the sediment deposited on the settling plate 2 is swept down in equal proportion. At the same time, the conveying assembly 6 conveys the flocculant to the periphery of the settling plate 2 and combines it with the falling sediment.

[0029] The working principle of the present invention: In the initial state, the torsion spring 21 is in a relaxed state. The solution is input into the settling tank 1. During the static process of the solution, the particles settle under the action of their own gravity. The particles in the upper solution layer fall on the settling plate 2, and the particles in the lower layer fall to the bottom surface and are discharged through the sludge discharging mechanism 12 and the sludge discharging pipe 11. When the weight of the particles on a settling plate 2 reaches a certain level, at this time the settling plate 2 rotates, and the moving mechanism 5 drives the first baffle 31 located on the settling plate 2 to move. The first baffle 31 drives the second baffle 32 and the third baffle 33 to move. The scraping plate 36 drives the particles to move, so that the particles fall. The setting of the sliding mechanism 4 enables the first baffle 31, the second baffle 32 and the third baffle 33 on multiple settling plates 2 not to interfere with each other. At the same time, the conveying assembly 6 conveys the flocculant to the settling plate 2 and mixes it with the falling particles, so that the particles form flocculent clusters, accelerating the settling speed. The falling flocculent clusters reach the bottom and are discharged through the sludge discharging mechanism 12. After the particles are scraped off, the torsion spring 21 drives the settling plate 2 to rotate, resetting the settling plate 2, and the particle settlement continues to fall on the settling plate 2.

[0030] Combined with attached Figure 5 、attached Figure 6 、attached Figure 7 and attached Figure 8As shown in the figure, the sliding mechanism 4 includes a first housing 41 and a second housing 42 respectively arranged on the third dial 33 and the second dial 32. A moving block 43 is provided on the first dial 31. The second housing 42 can be inserted into the first housing 41, and the moving block 43 can be inserted into the second housing 42. A clamping plate 44 with corresponding sides arranged is slidably provided in both the first housing 41 and the second housing 42. A second spring is provided between the clamping plate 44 and the first housing 41 and the second housing 42. One end of the clamping plate 44 is provided with a sliding column 46, and one end of the sliding column 46 is provided with a first limiting column 47. A trigger rod 49 is slidably provided on the sides of the first housing 41 and the second housing 42. One end of the trigger rod 49 is provided with an arc-shaped block 48 that cooperates with the first limiting column 47. A groove that cooperates with the sliding column 46 is provided on the arc-shaped block 48. A baffle 45 that cooperates with the trigger rod 49 is provided in the settling tank 1.

[0031] Working principle of the sliding mechanism 4: In the initial state, the second spring is in a relaxed state. When the L-shaped rod 3 drives the first dial 31 to move, the first dial 31 drives the second dial 32 and the third dial 33 to move. The trigger rod 49 on the first housing 41 gradually approaches the baffle 45 and abuts against it. Since the baffle 45 and the trigger rod 49 do not move, while the third dial 33 moves, the sliding column 46 is inserted into the groove of the arc-shaped block 48. At the same time, the first limiting column 47 drives the sliding column 46 to move, and the second spring is compressed. At this time, the clamping plate 44 no longer blocks the second housing 42, so the second housing 42 slides in the first housing 41. Similarly, the trigger rod 49 on the second housing 42 gradually approaches the baffle 45 and abuts against it. Since the baffle 45 and the trigger rod 49 do not move, the second dial 32 moves, so the sliding column 46 is inserted into the groove of the arc-shaped block 48. At the same time, the first limiting column 47 drives the sliding column 46 to move, and the second spring is compressed. At this time, the clamping plate 44 no longer blocks the moving block 43, and the moving block 43 slides in the second housing 42. When the moving block 43 fits against the baffle 45, the particles on the settling plate 2 are swept off at this time.

[0032] Combined with the attached Figure 1 、attached Figure 3 、attached Figure 5 and attached Figure 9 As shown in the figure, the moving mechanism 5 includes an arc-shaped slider 51 slidably arranged on the settling tank 1 corresponding to the settling plate 2. A first gear 52 is rotatably provided on the arc-shaped slider 51. A second gear 54 that meshes with the first gear 52 is provided on the settling tank 1. The sliding track of the arc-shaped slider 51 is an arc track where the first gear 52 meshes with the second gear 54. One end of the L-shaped rod 3 is provided with a rack 53 that cooperates with the first gear 52. After the arc-shaped slider 51 drives the first gear 52 to slide, it meshes with the rack 53. A rotating mechanism 55 for driving the second gear 54 to rotate is provided on the settling tank 1. A driving mechanism 7 for driving the first gear 52 to slide and then mesh with the rack 53 is provided on the settling tank 1. The driving mechanism 7 is driven by the rotation of the settling plate 2; The rotation mechanism 55 includes a rotating shaft 551 rotatably arranged on the sedimentation tank 1. A plurality of driving wheels 552 are provided on the rotating shaft 551. A driven wheel 553 is provided on the second gear 54. A transmission belt 554 is provided between the driving wheel 552 and the driven wheel 553. The rotating shaft 551 is driven by a motor.

[0033] Working principle of the moving mechanism 5: When the weight of the particles on one of the sedimentation plates 2 reaches a certain level, the sedimentation plate 2 rotates, driving the driving mechanism 7. The driving mechanism 7 drives the first gear 52 to slide, causing the first gear 52 to mesh with the rack 53. The motor drives the rotating shaft 551 to rotate. The rotating shaft 551 drives the second gear 54 to rotate through the driving wheel 552, the driven wheel 553, and the transmission belt 554. The second gear 54 drives the first gear 52 to rotate. The first gear 52 drives the rack 53 to move. The rack 53 drives the L-shaped rod 3 to move. The L-shaped rod 3 drives the first baffle 31 to move.

[0034] Combined with attached Figure 5 、attached Figure 9 、attached Figure 10 and attached Figure 11 As shown, the driving mechanism 7 includes a connecting rod 71 rotatably arranged on the first gear 52. The other end of the connecting rod 71 is rotatably connected to the second gear 54. Both ends of the sedimentation plate 2 are provided with a rotating shaft 72 passing through the sedimentation tank 1. One end of the rotating shaft 72 is provided with a second limit post 73. The torsion spring 21 is sleeved on the rotating shaft 72 and is located between the second limit post 73 and the sedimentation tank 1. A top block 74 is provided on the second limit post 73. A driving plate 75 is slidably arranged on the sedimentation tank 1. An extension rod 76 abutted against the connecting rod 71 is provided on the driving plate 75. The rotation of the sedimentation plate 2 drives the top block 74. The top block 74 drives the driving plate 75 to move upward. The extension rod 76 drives the connecting rod 71 to rotate. The connecting rod 71 drives the first gear 52 to slide along an arc.

[0035] Working principle of the driving mechanism 7: When the weight of the particles on one of the sedimentation plates 2 reaches a certain level, the sedimentation plate 2 rotates. The second limit post 73 located on the sedimentation plate 2 rotates. The torsion spring 21 twists. The second limit post 73 drives the top block 74 to rotate. The top block 74 contacts the driving plate 75 and drives it to move upward. The driving plate 75 drives the extension rod 76 to move upward. The extension rod 76 drives the connecting rod 71 to rotate. The connecting rod 71 drives the first gear 52 to slide along an arc. The first gear 52 meshes with the rack 53.

[0036] Combined with attached Figure 5 、attached Figure 9 、attached Figure 10 and attached Figure 12As shown in the figure, a fixing rod 731 is provided on the second limiting post 73. A clamping block 732 is slidably provided on the settling tank 1. A second reset spring is provided between the clamping block 732 and the settling tank 1. One end of the clamping block 732 is provided with an inclined surface that cooperates with the fixing rod 731. The other end of the clamping block 732 is provided with a moving rod 733. A limiting rod 734 is provided on the second limiting post 73, and a limiting plate 735 that cooperates with the limiting rod 734 is provided on the settling tank 1. The rotation of the first gear 52 drives the movement of the rack 53. One end of the rack 53 abuts against the moving rod 733 and drives the moving rod 733 to move. The moving rod 733 drives the clamping block 732 to move, separating the fixing rod 731 from the clamping block 732, and the settling plate 2 resets.

[0037] Working principle: In the initial state, the second reset spring is in a relaxed state. The settling plate 2 rotates, and the fixing rod 731 rotates. The fixing rod 731 contacts the inclined surface of the clamping block 732, and the fixing rod 731 forces the clamping block 732 to move, compressing the second reset spring. When the other side of the fixing rod 731 passes through the clamping block 732, the second reset spring pushes the clamping block 732 to reset. At this time, the other side of the fixing rod 731 fits against the bottom surface of the clamping block 732. At the same time, one side of the limiting rod 734 abuts against the limiting plate 735. The setting of the limiting rod 734 and the limiting plate 735 can prevent the settling plate 2 from rotating too much. The setting of the clamping block 732 and the fixing rod 731 can prevent the settling plate 2 from rebounding during the process of the first dial 31 sweeping off the particles. The top block 74 resets, the driving plate 75 moves down, the connecting rod 71 moves down, the first gear 52 resets under its own gravity, the first gear 52 does not mesh with the rack 53, and the first reset spring 34 pushes the L-shaped rod 3 to reset.

[0038] Combined with attached Figure 1 、attached Figure 4 、attached Figure 5 and attached Figure 13 As shown in the figure, the conveying assembly 6 includes a connecting pipe 62 and a liquid inlet pipe 63. The connecting pipe 62 passes through the settling tank 1 and the second limiting post 73 on one side and is in communication with the inside of the settling plate 2. The settling plate 2 is provided with a liquid outlet hole 61 that is in communication with the connecting pipe 62. The liquid inlet pipe 63 is rotatably connected to the connecting pipe 62. A control mechanism 8 for controlling the liquid outlet is provided on the settling plate 2.

[0039] The control mechanism 8 includes an inserting post 81 and a pressing block 83. The inserting post 81 is movably inserted into the settling plate 2. The settling plate 2 is provided with a slot that cooperates with the inserting post 81 and the slot is in communication with the liquid outlet hole 61. A third reset spring is provided between the inserting post 81 and the slot. The inserting post 81 is provided with a through hole 82. The pressing block 83 is fixedly provided on the inserting post 81. The top surface of the pressing block 83 is arc-shaped. The movement of the first dial 31, the second dial 32, and the third dial 33 drives the pressing block 83 to move down. The pressing block 83 drives the inserting post 81 to move down so that the through hole 82 is located in the liquid outlet hole 61, and the liquid flows out from the liquid outlet hole 61.

[0040] Working principle of the control mechanism 8: In the initial state, the reset spring III is in a relaxed state. The flocculant enters the connecting pipe 62 from the liquid inlet pipe 63 and then enters the liquid outlet hole 61. The scraper 36 moves on the sedimentation plate 2. When the scraper 36 contacts the pressing block 83 and forces the pressing block 83 to move downward, the pressing block 83 drives the plug post 81 to move downward. The through hole 82 on the plug post 81 enters the liquid outlet hole 61, and the flocculant is discharged from the liquid outlet hole 61. At this time, the particles fall and mix with the flocculant to form flocculant clusters.

[0041] In specific use, the liquid inlet pipe 63 is connected to an external pumping device, and then the solution is added into the sedimentation tank 1. During the static settlement of the solution, the upper-layer particles fall on the sedimentation plate 2, and the lower-layer particles fall to the bottom of the sedimentation tank 1 and are discharged through the sludge discharge mechanism 12. When the weight of the particles on the sedimentation plate 2 reaches a certain level, the sedimentation plate 2 rotates. The rotation of the sedimentation plate 2 drives the driving mechanism 7, and the driving mechanism 7 makes the first gear 52 mesh with the rack 53, so that the moving mechanism 5 drives the first baffle 31 to move. Through the sliding mechanism 4, the first baffles 31, the second baffles 32, and the third baffles 33 on multiple sedimentation plates 2 do not affect each other. The scraper 36 drives the particles to move, causing the particles to fall into the lower-layer solution. During the falling process of the particles, the conveying assembly 6 discharges the flocculant from the sedimentation plate 2. The flocculant mixes with the particles to form flocculant clusters, which accelerate and fall to the bottom of the sedimentation tank 1 and are then discharged through the sludge discharge mechanism 12.

[0042] The above describes the present invention and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. All in all, if those of ordinary skill in the art are inspired by it and, without departing from the purpose of the present invention, design similar structural manners and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present invention.

Claims

1. A sedimentation device for alumina production, comprising a sedimentation tank (1). A sludge discharge pipe (11) is provided at the bottom of the sedimentation tank (1), and a sludge discharge mechanism (12) cooperating with the sludge discharge pipe (11) is provided in the sedimentation tank (1). It is characterized in that: A plurality of sedimentation plates (2) are rotatably provided in the sedimentation tank (1). A torsion spring (21) is provided between the sedimentation plate (2) and the sedimentation tank (1). A first baffle plate (31), a second baffle plate (32) and a third baffle plate (33) are sequentially arranged in contact and sliding on the sedimentation plate (2). An L-shaped rod (3) for driving the first baffle plate (31) to slide is provided on the first baffle plate (31). A first return spring (34) is provided between the L-shaped rod (3) and the sedimentation tank (1). A sliding mechanism (4) for controlling whether the second baffle plate (32) and the third baffle plate (33) slide is provided on the first baffle plate (31), the second baffle plate (32) and the third baffle plate (33). A moving mechanism (5) for driving the L-shaped rod (3) to slide is provided on one side of the sedimentation tank (1). A conveying assembly (6) for conveying a flocculant and communicating with the sedimentation plate (2) is provided on the other side of the sedimentation tank (1); The solution is input into the sedimentation tank (1). The particles fall on the sedimentation plate (2) under the action of gravity. When the weight of the particles reaches a certain weight, the sedimentation plate (2) rotates against the torsion of the torsion spring (21) and inclines downward. The moving mechanism (5) drives the L-shaped rod (3) to move. The L-shaped rod (3) drives the first baffle plate (31) to move. The first baffle plate (31) drives the second baffle plate (32) and the third baffle plate (33) to move, and sweeps the sediment deposited on the sedimentation plate (2) down in equal proportion. At the same time, the conveying assembly (6) conveys the flocculant to the periphery of the sedimentation plate (2) to combine with the falling sediment.

2. The settling device for alumina production according to claim 1, characterized in that: The sliding mechanism (4) includes a first housing (41) and a second housing (42) respectively provided on the third baffle plate (33) and the second baffle plate (32). A moving block (43) is provided on the first baffle plate (31). The second housing (42) can be inserted into the first housing (41), and the moving block (43) can be inserted into the second housing (42). Clamping plates (44) arranged corresponding to both sides are slidably provided in the first housing (41) and the second housing (42). A second spring is provided between the clamping plates (44) and the first housing (41) and the second housing (42). A sliding column (46) is provided at one end of the clamping plate (44). A first limiting column (47) is provided at one end of the sliding column (46). A trigger rod (49) is slidably provided on the sides of the first housing (41) and the second housing (42). An arc-shaped block (48) cooperating with the first limiting column (47) is provided at one end of the trigger rod (49). A groove cooperating with the sliding column (46) is provided on the arc-shaped block (48). A baffle (45) cooperating with the trigger rod (49) is provided in the sedimentation tank (1).

3. The settling device for alumina production according to claim 1, characterized in that: The moving mechanism (5) includes an arc-shaped slider (51) slidably arranged on the sedimentation tank (1) corresponding to the sedimentation plate (2). A first gear (52) is rotatably arranged on the arc-shaped slider (51). A second gear (54) meshing with the first gear (52) is arranged on the sedimentation tank (1). The sliding trajectory of the arc-shaped slider (51) is an arc trajectory where the first gear (52) meshes with the second gear (54). One end of the L-shaped rod (3) is provided with a rack (53) cooperating with the first gear (52). After the arc-shaped slider (51) drives the first gear (52) to slide, it meshes with the rack (53). A rotating mechanism (55) for driving the second gear (54) to rotate is arranged on the sedimentation tank (1). A driving mechanism (7) for driving the first gear (52) to slide and then mesh with the rack (53) is arranged on the sedimentation tank (1). The driving mechanism (7) is driven by the rotation of the sedimentation plate (2).

4. The sedimentation device for alumina production according to claim 3, characterized in that: The driving mechanism (7) includes a connecting rod (71) rotatably arranged on the first gear (52). The other end of the connecting rod (71) is rotatably connected to the second gear (54). Rotating shafts (72) penetrating the sedimentation tank (1) are arranged at both ends of the sedimentation plate (2). A second limiting post (73) is arranged at one end of the rotating shaft (72). A torsion spring (21) is sleeved on the rotating shaft (72) and is located between the second limiting post (73) and the sedimentation tank (1). A top block (74) is arranged on the second limiting post (73). A driving plate (75) is slidably arranged on the sedimentation tank (1). An extension rod (76) abuting against the connecting rod (71) is arranged on the driving plate (75). When the sedimentation plate (2) rotates to drive the top block (74), the top block (74) drives the driving plate (75) to move upward, the extension rod (76) drives the connecting rod (71) to rotate, and the connecting rod (71) drives the first gear (52) to slide in the arc direction.

5. A sedimentation device for alumina production according to claim 4, characterized in that: A fixing rod (731) is arranged on the second limiting post (73). A clamping block (732) is slidably arranged on the sedimentation tank (1). A second return spring is arranged between the clamping block (732) and the sedimentation tank (1). One end of the clamping block (732) is provided with an inclined surface cooperating with the fixing rod (731). A moving rod (733) is arranged at the other end of the clamping block (732). A limiting rod (734) is arranged on the second limiting post (73). A limiting plate (735) cooperating with the limiting rod (734) is arranged on the sedimentation tank (1). When the first gear (52) rotates to drive the rack (53) to move, one end of the rack (53) abuts against the moving rod (733) and drives the moving rod (733) to move. The moving rod (733) drives the clamping block (732) to move, separating the fixing rod (731) from the clamping block (732), and the sedimentation plate (2) resets.

6. The settling device for alumina production according to claim 4, characterized in that: The conveying assembly (6) includes a connecting pipe (62) and a liquid inlet pipe (63). The connecting pipe (62) passes through the sedimentation tank (1) and the second limiting post (73) on one side and is internally communicated with the sedimentation plate (2). Liquid outlet holes (61) communicating with the connecting pipe (62) are arranged on the sedimentation plate (2). The liquid inlet pipe (63) is rotatably connected to the connecting pipe (62). A control mechanism (8) for controlling liquid outlet is arranged on the sedimentation plate (2).

7. The sedimentation device for alumina production according to claim 6, characterized in that: The control mechanism (8) includes an insertion post (81) and a pressing block (83). The insertion post (81) is movably inserted into the settlement plate (2). The settlement plate (2) is provided with a slot that cooperates with the insertion post (81), and the slot communicates with the liquid outlet hole (61). A third return spring is provided between the insertion post (81) and the slot. The insertion post (81) is provided with a through hole (82). The pressing block (83) is fixedly arranged on the insertion post (81). The top surface of the pressing block (83) is arc-shaped. The movement of the first dial plate (31), the second dial plate (32), and the third dial plate (33) drives the pressing block (83) to move downward. The pressing block (83) drives the insertion post (81) to move downward so that the through hole (82) is located within the liquid outlet hole (61), and the liquid flows out from the liquid outlet hole (61).

Images