Pre-desiliconization equipment in alumina production

Abstract

The utility model relates to a pre-desiliconization device in alumina production, comprising a stirring tank, a valve, a rotating rod, a driving part and a wall scraper. The upper end of the stirring tank is provided with an injection port for alumina slurry to enter the stirring tank, the lower end of the stirring tank is provided with a discharge port for the alumina slurry in the stirring tank to be discharged, the valve is arranged on the discharge port, the rotating rod is rotatably arranged in the middle of the stirring tank, the rotating rod is arranged vertically, the driving part is used to drive the rotating rod to rotate, the wall scraper is fixedly connected to the rotating rod, and the wall scraper is used to scrape the inner surface of the side wall of the stirring tank. The wall scraper scrapes the inner surface of the side wall of the stirring tank, and the alumina slurry adhered to the inner surface of the side wall of the stirring tank will gather and accumulate under the scraping of the wall scraper, flow along the inner surface of the side wall of the stirring tank to the bottom wall of the stirring tank under the action of gravity, and then be discharged from the discharge port, reducing the alumina slurry adhered to the inner surface of the side wall of the stirring tank, that is, it can reduce the waste of alumina slurry in the subsequent flushing process of the stirring tank.

Description

Technical Field

[0001] The utility model relates to the technical field of alumina production, in particular to pre-desiliconization equipment in alumina production. Background Art

[0002] Alumina is an inorganic substance and a high hardness compound. It is often used as an analytical reagent, dehydration of organic solvents, adsorbent, organic reaction catalyst, abrasive, polishing agent, raw material for smelting aluminum and refractory material. Alumina has a high application value. When producing alumina, it often contains silicon-containing minerals, which affects the quality of alumina. Therefore, we need to pre-desiliconize. When pre-desiliconizing alumina, pre-desiliconizing equipment is needed.

[0003] When alumina is desiliconized using existing pre-desiliconization equipment, the alumina slurry is naturally discharged after being stirred in the stirring tank of the pre-desiliconization equipment. However, after most of the alumina slurry is discharged, some of the alumina slurry still adheres to the tank wall of the stirring tank. When the stirring tank is subsequently cleaned, the alumina slurry adhered to the tank wall of the stirring tank will be directly washed away, resulting in a waste of the alumina slurry. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a pre-desiliconization equipment in alumina production, so as to solve the problem that when using the existing pre-desiliconization equipment to desiliconize alumina, some alumina slurry still adheres to the tank wall of the stirring tank after most of the alumina slurry is discharged, resulting in waste of alumina slurry.

[0005] The utility model is realized by the following technical solutions:

[0006] A pre-desiliconization device in alumina production comprises a stirring tank, a valve, a rotating rod, a driving part and a wall scraper. The upper end of the stirring tank is provided with an injection port for alumina slurry to enter the stirring tank, and the lower end of the stirring tank is provided with a discharge port for the alumina slurry in the stirring tank to be discharged. The valve is arranged on the discharge port, the rotating rod is rotatably arranged in the middle of the stirring tank, the rotating rod is arranged vertically, the driving part is used to drive the rotating rod to rotate, the wall scraper is fixedly connected to the rotating rod, and the wall scraper is used to scrape the inner surface of the side wall of the stirring tank.

[0007] It is further defined that the wall scraper portion includes a frame and a first scraper, the frame is fixedly connected to the rotating rod, the first scraper is vertically arranged, the inner side of the first scraper is fixedly connected to the frame, and the outer side is in contact with the inner surface of the side wall of the mixing tank.

[0008] It is further defined that a plurality of stirring blades are provided on the rotating rod; the frame body comprises a connecting piece, a shaft rod, a sleeve and a torsion spring, the inner end of the connecting piece is fixedly connected to the rotating rod, the shaft rod is arranged vertically, the lower end of the shaft rod is fixedly connected to the outer end of the connecting piece, the sleeve is rotatably fitted on the shaft rod, the torsion spring is sleeved on the shaft rod, one end of the torsion spring is fixedly connected to the shaft rod, and the other end of the torsion spring is fixedly connected to the sleeve; the inner side surface of the first scraper is fixedly connected to the sleeve.

[0009] It is further defined that the frame also includes a limit plate, which is fixed on the shaft rod and abuts against the front side of the first scraper.

[0010] It is further defined that the connecting member includes a connecting rod and a second scraper, the inner end of the connecting rod is fixedly connected to the rotating rod, the second scraper is fixedly connected to the connecting rod, and the lower side surface of the second scraper is in contact with the inner surface of the bottom wall of the mixing tank; the lower end of the shaft is fixedly connected to the connecting rod.

[0011] It is further defined that the inner surface of the bottom wall of the stirring tank gradually decreases from the edge to the middle, and the discharge port is arranged in the middle of the bottom wall of the stirring tank.

[0012] It is further defined that a through hole is formed in the middle of the upper end of the mixing tank, a bearing is fixedly provided on the upper surface of the mixing tank at a position corresponding to the through hole, the upper end of the rotating rod passes through the through hole and the bearing hole of the bearing in sequence and is located on the upper side of the mixing tank, and the rotating rod is fixed in the bearing hole of the bearing.

[0013] It is further defined that the driving part includes a motor, a first pulley, a second pulley and a transmission belt, the motor is fixed on the mixing tank, the first pulley is arranged on the output shaft of the motor, the second pulley is arranged at the upper end of the rotating rod, and the first pulley and the second pulley are connected by a transmission belt.

[0014] The beneficial effects of the utility model are:

[0015] When using the pre-desiliconization equipment in alumina production of the utility model, in the process of the wall scraper scraping the inner surface of the side wall of the stirring tank, the alumina slurry adhering to the inner surface of the side wall of the stirring tank will be gathered and accumulated under the scraping action of the wall scraper, and part of the gathered and accumulated alumina slurry can flow along the inner surface of the side wall of the stirring tank to the bottom wall of the stirring tank under the action of gravity, and then be discharged from the discharge port, which can reduce the alumina slurry adhering to the inner surface of the side wall of the stirring tank, that is, can reduce the amount of alumina slurry wasted in the subsequent flushing of the stirring tank.

[0016] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the front view of the utility model;

[0018] Figure 2 It is a cross-sectional view of the utility model;

[0019] Figure 3 for Figure 2 A structural view of the first scraper in the initial state;

[0020] Figure 4 for Figure 2 Structural view of the first scraper at A after rotation.

[0021] In the figure: 1, stirring tank; 2, valve; 3, rotating rod; 4, driving part; 5, wall scraper; 6, injection port; 7, discharge port; 8, frame; 9, first scraper; 10, stirring blade; 11, connecting piece; 12, shaft rod; 13, shaft sleeve; 14, torsion spring; 15, limit plate; 16, connecting rod; 17, second scraper; 18, bearing; 19, motor; 20, first pulley; 21, second pulley; 22, transmission belt; DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the above description of the utility model, it should be noted that the terms "one side", "the other side", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0026] In addition, the term "same" does not mean that the parts must be absolutely the same, but slight differences are allowed. The term "vertical" only means that the positional relationship between the parts is more vertical than "parallel", and does not mean that the structure must be completely vertical, but can be slightly tilted.

[0027] See also Figure 1 and Figure 2 The utility model provides a technical solution: a pre-desiliconization equipment in alumina production, comprising a stirring tank 1, a valve 2, a rotating rod 3, a driving part 4 and a wall scraper 5, wherein the upper end of the stirring tank 1 is provided with an injection port 6 for alumina slurry to enter the stirring tank 1, and the lower end of the stirring tank 1 is provided with a discharge port 7 for the alumina slurry in the stirring tank 1 to be discharged, the valve 2 is arranged on the discharge port 7, the rotating rod 3 is rotatably arranged in the middle of the stirring tank 1, the rotating rod 3 is arranged vertically, the driving part 4 is used to drive the rotating rod 3 to rotate, the wall scraper 5 is fixedly connected to the rotating rod 3, and the wall scraper 5 is used to scrape the inner surface of the side wall of the stirring tank 1.

[0028] Before the alumina slurry in the stirring tank 1 is discharged, the valve 2 is in a closed state, and the alumina slurry in the stirring tank 1 cannot be discharged through the discharge port 7 .

[0029] When the alumina slurry in the stirring tank 1 needs to be discharged, the valve 2 is opened, and the alumina slurry flows and is discharged naturally from the discharge port 7, and part of the alumina slurry adheres to the tank wall of the stirring tank 1. After the alumina slurry in the stirring tank 1 is basically discharged, the driving part 4 drives the rotating rod 3 to rotate, and the rotating rod 3 drives the wall scraper 5 to make a circular motion. The wall scraper 5 scrapes the inner surface of the side wall of the stirring tank 1 during the circular motion. In the process of the wall scraper 5 scraping the inner surface of the side wall of the stirring tank 1, the alumina slurry adhered to the inner surface of the side wall of the stirring tank 1 will gather and accumulate under the scraping action of the wall scraper 5, and part of the alumina slurry in the gathered and accumulated alumina slurry can flow along the inner surface of the side wall of the stirring tank 1 to the bottom wall of the stirring tank 1 under the action of gravity, and then be discharged from the discharge port 7, which can reduce the alumina slurry adhered to the inner surface of the side wall of the stirring tank 1, that is, it can reduce the waste of alumina slurry in the subsequent flushing process of the stirring tank 1.

[0030] In this embodiment, the stirring tank 1 includes a side wall, a top wall and a bottom wall, the side wall is cylindrical, the top wall is fixedly arranged at the upper end of the side wall, the top wall closes the upper end of the side wall, the bottom wall is fixedly arranged at the lower end of the side wall, the bottom wall closes the lower end of the side wall, the inner surface of the bottom wall of the stirring tank 1 gradually decreases from the edge to the middle, the injection port 6 is arranged on the top wall, and the discharge port 7 is arranged in the middle of the bottom wall of the stirring tank 1.

[0031] The inner surface of the bottom wall of the stirring tank 1 is arranged to gradually decrease from the edge to the middle, and the discharge port 7 is arranged in the middle of the bottom wall. The bottom wall can guide the alumina slurry to the discharge port 7.

[0032] In this embodiment, the wall scraper 5 includes a frame 8 and a first scraper 9, the frame 8 is fixedly connected to the rotating rod 3, the first scraper 9 is arranged vertically, the inner side of the first scraper 9 is fixedly connected to the frame 8, and the outer side is in contact with the inner surface of the side wall of the mixing tank 1. The inner side refers to the side of the first scraper 8 facing the middle of the mixing tank 1, and the outer side refers to the side of the first scraper 8 facing away from the middle of the mixing tank 1.

[0033] The outer side surface of the vertically arranged first scraper 9 is in contact with the inner surface of the stirring tank 1. When the driving unit 4 drives the rotating rod 3 to rotate, the rotating rod 3 drives the frame 8 and the first scraper 9 to make a circular motion. During the circular motion of the first scraper 9, the outer side surface of the first scraper 9 can scrape the alumina slurry adhered to the inner surface of the side wall of the stirring tank 1.

[0034] In this embodiment, the rotating rod 3 is provided with a plurality of stirring blades 10; the frame 8 includes a connecting member 11, a shaft 12, a sleeve 13 and a torsion spring 14, the inner end of the connecting member 11 is fixedly connected to the rotating rod 3, the shaft 12 is arranged vertically, the lower end of the shaft 12 is fixedly connected to the outer end of the connecting member 11, the sleeve 13 is rotatably fitted on the shaft 12, the torsion spring 14 is sleeved on the shaft 12, one end of the torsion spring 14 is fixedly connected to the shaft 12, and the other end of the torsion spring 14 is fixedly connected to the sleeve 13; the inner side of the first scraper 9 is fixedly connected to the sleeve 13. The inner end of the connecting member 11 is the end of the connecting member 11 close to the rotating rod 2, and the outer end of the connecting member 11 is the end of the connecting member 11 away from the rotating rod 2.

[0035] The driving part 4 drives the rotating rod 3 to rotate, and the rotating rod 3 can drive the stirring blade 10 to rotate and stir the alumina slurry in the stirring tank 1. There is no need to set up a stirring shaft separately, which can save production costs.

[0036] In the initial state, the outer side surface of the first scraper 9 is in contact with the inner surface of the side wall of the mixing tank 1 (see Figure 3 shown).

[0037] Since the sleeve 13 is rotatably engaged with the shaft 12, the inner side of the first scraper 9 is fixedly connected to the sleeve 13, and the first scraper 9 can rotate on the shaft 12. During the stirring of the alumina slurry, the first scraper 9 will make a circular motion driven by the rotating rod 3. During the circular motion of the first scraper 9, the alumina slurry will cause a resistance to the first scraper 9 in the opposite direction of the movement of the first scraper 9. This resistance will cause the end of the outer side of the first scraper 9 to rotate in the opposite direction of the movement of the first scraper 9, so that the first scraper 9 is deflected by a certain angle on the shaft 12, and the outer side of the first scraper 9 will be separated from the inner surface of the mixing tank 1 (please refer to Figure 4 As shown), the torsion spring 14 will be torsionally deformed, and the aluminum oxide slurry causing resistance to the first scraper 9 in the movement direction of the first scraper 9 will be reduced, thereby reducing the resistance encountered by the rotating rod 3 during rotation and reducing the load on the driving part 4.

[0038] After the stirring of the alumina slurry is stopped, the first scraper 9 is restored to its initial state under the elastic restoring action of the torsion spring 14 , and the outer side surface of the first scraper 9 is in contact with the inner surface of the side wall of the stirring tank 1 .

[0039] In this embodiment, the frame 8 further includes a limit plate 15 , which is fixed on the shaft 12 , and the limit plate 15 abuts against the front side of the first scraper 9 .

[0040] In this embodiment, the movement direction of the first scraper 9 during the stirring of the alumina slurry is taken as the front, and the direction opposite to the movement direction of the first scraper 9 during the stirring of the alumina slurry is taken as the rear. The limit plate 15 is located at the front side of the first scraper 9 and abuts against the front side surface of the first scraper 9.

[0041] In the initial state, the outer side surface of the first scraper 9 is in contact with the inner surface of the side wall of the mixing tank 1 , and the front side surface of the first scraper 9 abuts against the limiting plate 15 .

[0042] When stirring the alumina slurry, the end of the outer side surface of the first scraper 9 will rotate in the opposite direction of the movement direction of the first scraper 9, that is, the end of the outer side surface of the first scraper 9 can rotate backward, and the front side surface of the first scraper 9 will separate from the limiting plate 15, and the torsion spring 14 will be twisted and deformed; after stopping stirring the alumina slurry, the first scraper 9 returns to its initial state under the elastic reset action of the torsion spring 14, and the front side surface of the first scraper 9 returns to be in contact with the limiting plate 15, and the outer side surface of the first scraper 9 returns to fit the inner surface of the side wall of the stirring tank 1.

[0043] When scraping the inner surface of the side wall of the stirring tank 1, the rotation direction of the rotating rod 3 is opposite to the rotation direction of the rotating rod 3 during the stirring of the alumina slurry, and the movement direction of the first scraper 9 is also opposite to the movement direction of the first scraper 9 during the stirring of the alumina slurry, that is, the first scraper 9 moves backward and scrapes the inner surface of the side wall of the stirring tank 1. In the process of the first scraper 9 scraping the inner surface of the side wall of the stirring tank 1, the limit plate 15 abuts against the front side of the first scraper 9, so that the end where the outer side of the first scraper 9 is located will not rotate forward, so that the outer side of the first scraper 9 can stably fit the inner surface of the side wall of the stirring tank 1, so that the wall scraper 5 can have a better scraping effect on the inner surface of the side wall of the stirring tank 1.

[0044] In this embodiment, the connecting member 11 includes a connecting rod 16 and a second scraper 17, the inner end of the connecting rod 16 is fixedly connected to the rotating rod 3, the second scraper 17 is fixedly connected to the connecting rod 16, and the lower side of the second scraper 17 is in contact with the inner surface of the bottom wall of the mixing tank 1; the lower end of the shaft 12 is fixedly connected to the connecting rod 16. The inner end of the connecting rod 16 is the end of the connecting rod 16 close to the rotating rod 3, and the outer end of the connecting rod 16 is the end of the connecting rod 16 away from the rotating rod 3.

[0045] With this structure, while the first scraper 9 scrapes the inner surface of the side wall of the stirring tank 1, the lower side of the second scraper 17 can scrape the inner surface of the bottom wall of the stirring tank 1, and the alumina slurry adhering to the inner surface of the bottom wall of the stirring tank 1 will be gathered and accumulated under the scraping action of the second scraper 17. Part of the oxidized slurry in the gathered and accumulated alumina slurry can flow along the inner surface of the bottom wall of the stirring tank 1 to the discharge port 7 under the action of gravity and be discharged, which can further reduce the alumina slurry adhering to the inner surface of the stirring tank 1 and further reduce the waste of alumina slurry.

[0046] In this embodiment, a through hole is formed in the middle of the upper end of the mixing tank 1. Specifically, the through hole is formed on the top wall. A bearing 18 is fixedly provided on the upper surface of the mixing tank 1 at a position corresponding to the through hole. Specifically, the bearing 18 is fixedly provided on the upper surface of the top wall. The upper end of the rotating rod 3 passes through the through hole and the bearing 18 hole of the bearing 18 in sequence and is located on the upper side of the mixing tank 1. The rotating rod 3 is fixedly provided in the bearing 18 hole of the bearing 18. With this structure, the rotating rod 3 can be rotatably provided on the mixing tank 1.

[0047] In this embodiment, the driving unit 4 includes a motor 19, a first pulley 20, a second pulley 21 and a transmission belt 22. The motor 19 can be a motor with model YX3-100L1-4. The motor 19 is fixed on the stirring tank 1. The first pulley 20 is arranged on the output shaft of the motor 19. The second pulley 21 is arranged at the upper end of the rotating rod 3. The first pulley 20 and the second pulley 21 are connected by a transmission belt 22.

[0048] The motor 19 rotates, and the output shaft of the motor 19 can drive the first pulley 20 to rotate. The transmission belt 22 can make the second pulley 21 and the first pulley 20 work together, and the rotating rod 3 can rotate with the second pulley 21. With this structure, the driving unit 4 can drive the rotating rod 3 to rotate. The rotating direction of the rotating rod 3 can be changed by changing the rotating direction of the motor 19.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A pre-desiliconization device in alumina production, characterized in that: The invention comprises a stirring tank (1), a valve (2), a rotating rod (3), a driving part (4) and a wall scraping part (5); the upper end of the stirring tank (1) is provided with an injection port (6) for aluminum oxide slurry to enter the stirring tank (1); the lower end of the stirring tank (1) is provided with a discharge port (7) for aluminum oxide slurry in the stirring tank (1) to be discharged; the valve (2) is arranged on the discharge port (7); the rotating rod (3) is rotatably arranged in the middle of the stirring tank (1); the rotating rod (3) is arranged vertically; the driving part (4) is used to drive the rotating rod (3) to rotate; the wall scraping part (5) is fixedly connected to the rotating rod (3); and the wall scraping part (5) is used to scrape the inner surface of the side wall of the stirring tank (1).

2. The pre-desiliconization equipment in alumina production according to claim 1, characterized in that: The wall scraper (5) comprises a frame (8) and a first scraper (9); the frame (8) is fixedly connected to the rotating rod (3); the first scraper (9) is arranged vertically; the inner side of the first scraper (9) is fixedly connected to the frame (8) and the outer side is in contact with the inner surface of the side wall of the mixing tank (1).

3. The pre-desiliconization equipment in alumina production according to claim 2, characterized in that: The rotating rod (3) is provided with a plurality of stirring blades (10); the frame (8) comprises a connecting piece (11), a shaft rod (12), a sleeve (13) and a torsion spring (14); the inner end of the connecting piece (11) is fixedly connected to the rotating rod (3); the shaft rod (12) is arranged vertically; the lower end of the shaft rod (12) is fixedly connected to the outer end of the connecting piece (11); the sleeve (13) is rotatably fitted on the shaft rod (12); the torsion spring (14) is sleeved on the shaft rod (12); one end of the torsion spring (14) is fixedly connected to the shaft rod (12); the other end of the torsion spring (14) is fixedly connected to the sleeve (13); the inner side surface of the first scraper (9) is fixedly connected to the sleeve (13).

4. The pre-desiliconization equipment in alumina production according to claim 3, characterized in that: The frame (8) further comprises a limit plate (15), wherein the limit plate (15) is fixedly mounted on the shaft (12), and the limit plate (15) abuts against the front side surface of the first scraper (9).

5. The pre-desiliconization equipment in alumina production according to claim 3, characterized in that: The connecting member (11) comprises a connecting rod (16) and a second scraper (17); the inner end of the connecting rod (16) is fixedly connected to the rotating rod (3); the second scraper (17) is fixedly connected to the connecting rod (16); the lower side surface of the second scraper (17) is in contact with the inner surface of the bottom wall of the mixing tank (1); and the lower end of the shaft (12) is fixedly connected to the connecting rod (16).

6. The pre-desiliconization equipment in alumina production according to claim 1, characterized in that: The inner surface of the bottom wall of the stirring tank (1) gradually decreases from the edge to the middle, and the discharge port (7) is arranged in the middle of the bottom wall of the stirring tank (1).

7. The pre-desiliconization equipment in alumina production according to claim 1, characterized in that: A through hole is formed in the middle of the upper end of the stirring tank (1); a bearing (18) is fixedly arranged on the upper surface of the stirring tank (1) at a position corresponding to the through hole; the upper end of the rotating rod (3) passes through the through hole and the bearing (18) hole of the bearing (18) in sequence and is located on the upper side of the stirring tank (1); the rotating rod (3) is fixedly arranged in the bearing (18) hole of the bearing (18).

8. The pre-desiliconization equipment in alumina production according to claim 1, characterized in that: The driving part (4) comprises a motor (19), a first pulley (20), a second pulley (21) and a transmission belt (22); the motor (19) is fixedly mounted on the stirring tank (1); the first pulley (20) is arranged on an output shaft of the motor (19); the second pulley (21) is arranged on an upper end of the rotating rod (3); the first pulley (20) and the second pulley (21) are connected in transmission via a transmission belt (22).

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