Efficient red mud dealkalization device

Abstract

The invention relates to a mixing device, and provides an efficient red mud dealkalization device which comprises an outer tank body with an opening in the lower end and obliquely arranged, a bracket for supporting the outer tank body, a driving device for driving the outer tank body to rotate, an inner tank body detachably arranged in the outer tank body and with an opening in the upper end, and a first connecting ring arranged at the lower end part of the outer tank body, the first connecting ring is arranged at the upper end part of the outer tank body, the second connecting ring is arranged at the lower end part of the inner tank body, the barrel-shaped filter cloth is laid on the inner wall of the inner tank body, the pressurizing device is arranged at the upper end of the outer tank body, the feeding device is arranged at the upper end of the outer tank body, the spoilers are arranged in the outer tank body, and the extrusion rings are arranged at the lower ends of the spoilers; the first connecting ring and the second connecting ring are detachably connected in a sealed mode, the multiple spoilers are distributed in a circumferential mode and abut against the filter cloth on the inner side wall of the inner tank body, and the pressing ring is used for extruding the filter cloth on the inner bottom wall of the inner tank body. According to the efficient red mud dealkalization device, red mud can be dealkalized efficiently, and the slurry mixing efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of mixing devices, and in particular to a red mud high-efficiency dealkalization device. Background Art

[0002] Red mud is industrial solid waste discharged when the aluminum industry extracts alumina. It is called red mud because it contains a large amount of iron oxide and looks similar to red soil. Red mud is difficult to use directly due to its strong alkalinity. When it is piled in the open air, NaOH and impurities containing metal oxides in the red mud will precipitate from the red mud, causing land salinization and pollution of surface water and groundwater. Due to the small particle size and poor agglomeration performance of red mud, the dry red mud powder will spread with the wind, causing air pollution. If not handled properly, red mud will eventually threaten human health and safety.

[0003] When red mud is reused for the second time, dealkalization of red mud (i.e., removing the strong alkalinity of red mud) is an extremely important step and basis. Common red mud dealkalization methods include lime dealkalization, salt dealkalization, acid dealkalization, acid gas dealkalization, water washing dealkalization, etc. Among them, lime dealkalization utilizes the weak alkalinity of lime to decompose in lime solution to produce hydroxide ions (OH-), which react with metal ions such as sodium and aluminum in red mud to neutralize, thereby reducing the alkalinity of red mud. Among them, lime can also be replaced by carbide slag, thereby effectively consuming carbide slag, but the traditional lime dealkalization process is relatively complicated, and it needs to go through mixing, stirring, slurry mixing, filter pressing and other processes, and because the solid content in red mud and carbide slag is high, the resistance is large during stirring and mixing, and the mixing efficiency is not high. Therefore, a more efficient red mud dealkalization device can be designed. Summary of the invention

[0004] The object of the present invention is to provide a red mud high-efficiency dealkalization device, which can efficiently dealkalize red mud and improve the mixing efficiency of slurry.

[0005] The embodiment of the present invention is achieved through the following technical scheme: the red mud efficient dealkalization device of the present invention comprises an outer tank body with an opening at the lower end and an inclined arrangement, a bracket for supporting the outer tank body, a driving device for driving the outer tank body to rotate, an inner tank body detachably arranged inside the outer tank body and with an opening at the upper end, a first connecting ring arranged at the lower end of the outer tank body, a second connecting ring arranged at the lower end of the inner tank body, a barrel-shaped filter cloth laid on the inner wall of the inner tank body, a pressurizing device arranged at the upper end of the outer tank body, a feeding device arranged at the upper end of the outer tank body, a plurality of spoilers arranged in the outer tank body, and an extrusion ring arranged at the lower end of the spoiler; the first connecting ring and the second connecting ring are detachably and sealingly connected, the plurality of spoilers are distributed circumferentially, the spoilers abut against the filter cloth on the inner side wall of the inner tank body, and the pressure ring is used to squeeze the filter cloth on the inner bottom wall of the inner tank body.

[0006] Furthermore, the feeding device includes a sliding rod sealed and slidably connected to the upper end wall of the outer tank body, a feeding channel arranged inside the upper end of the sliding rod, a sprinkling hole arranged on the side wall of the sliding rod, and a feeding pipe arranged on the side wall of the upper end of the sliding rod; the feeding pipe is connected to the upper end of the feeding channel, and the sprinkling hole is connected to the lower end of the feeding channel.

[0007] Furthermore, the feeding device also includes a limit rod connected to the bracket, and a stirring plate arranged at the lower end of the sliding rod; the limit rod is a telescopic structure, and the limit rod is detachably connected to the feeding pipe.

[0008] Furthermore, the feeding device also includes a first sealing plate arranged on the sliding rod, a plurality of limit grooves opened on the edge of the first sealing plate, a second sealing plate arranged on the inner top wall of the outer tank body, and a plurality of limit blocks arranged on the edge of the second sealing plate; the limit blocks correspond one-to-one to the limit grooves; the first sealing plate is arranged inside the outer tank body; the material sprinkling hole passes through the sliding rod, and a latch rod is detachably provided in the material sprinkling hole, and the latch rod is arranged on the outer top wall of the outer tank body.

[0009] Furthermore, a drain pipe is provided on the lower end wall of the inner tank body, and a valve is provided on the drain pipe.

[0010] Furthermore, a filter plate is provided on the inner bottom wall of the inner tank body, and the filter plate is provided between the inner bottom wall of the inner tank body and the filter cloth.

[0011] Furthermore, the outer wall of the inner tank body is provided with a plurality of connecting columns, the upper end of the filter cloth is passed around the upper end of the inner tank body and then attached to the outer wall of the inner tank body, and the end of the filter cloth is provided with a plurality of connecting ropes, which are connected to the connecting columns; the connecting ropes are made of elastic material.

[0012] Furthermore, the bracket includes a base plate, a pair of pillars arranged on the base plate, a ring fixedly arranged on the outer wall of the outer tank body, and a support ring rotatably connected to the ring; the upper ends of the pair of pillars are connected to the support ring.

[0013] Furthermore, the driving device includes a motor arranged on the bottom plate, a driving wheel arranged on the output shaft of the motor, and a transmission belt for connecting the driving wheel and the outer wall of the tank body.

[0014] Furthermore, an inner wall of the outer tank is provided with a heating wire.

[0015] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects: the red mud efficient dealkalization device of the present invention, when in use, the empty inner tank body is inserted into the outer tank body, and then the first connecting ring and the second connecting ring are connected by bolts and nuts. At this time, the spoiler and the squeezing ring will squeeze the filter cloth in the inner tank body, so that the filter cloth is close to the inner wall of the inner tank body, and then the red mud and lime slurry (or calcium carbide) are poured into the filter cloth of the inner tank body through the feeding device. Then the driving device is used to drive the outer tank body and the inner tank body to rotate. During the rotation process, the spoiler will play a role of disturbing and stirring the slurry, so that the red mud and lime are evenly mixed. After a certain period of time, the rotation is stopped, and the pressure device (intake pipe) on the outer tank body is connected to the air compressor to pressurize the outer tank body. After the pressurization is completed, the outer tank body and the inner tank body are driven to rotate again, so that the red mud and lime continue to react under high pressure for a period of time, and finally the pressure is released, the first connecting ring and the second connecting ring are disassembled, the inner tank body is taken out, and the filter cloth is directly lifted to filter the slurry. In this way, the device completes normal pressure mixing, high pressure mixing, and filtration in the same device. There is no need to transport the slurry back and forth between multiple devices, and only the filter cloth needs to be cleaned each time (the cleaned filter cloth can be quickly replaced), which can significantly reduce the number of equipment and improve the red mud treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic structural diagram of a state of a red mud high-efficiency dealkalization device provided by an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of the structure of a two-state red mud high-efficiency dealkalization device provided in an embodiment of the present invention;

[0019] Figure 3 for Figure 1 Schematic diagram of the internal structure;

[0020] Figure 4 for Figure 2 Schematic diagram of the internal structure;

[0021] Figure 5 A schematic diagram of the structure of the outer tank body provided by an embodiment of the present invention;

[0022] Figure 6 A schematic diagram of the structure of the interior of an outer tank provided by an embodiment of the present invention;

[0023] Figure 7 A schematic structural diagram of an inner tank body provided by an embodiment of the present invention;

[0024] Figure 8 A schematic diagram of the structure of a bracket part provided by an embodiment of the present invention;

[0025] Fig. 9 A schematic diagram of the structure of a spoiler portion provided by an embodiment of the present invention;

[0026] Fig.10 A schematic structural diagram of a sliding rod portion provided in an embodiment of the present invention.

[0027] Icons: 11-outer tank body, 12-first connecting ring, 13-spoiler, 14-pressure ring, 15-inlet pipe, 16-sleeve ring, 21-inner tank body, 22-second connecting ring, 23-connecting column, 24-filter cloth, 25-connecting rope, 26-filter plate, 27-drain pipe, 31-slide rod, 32-feed channel, 33-feed pipe, 34-sprinkling hole, 35-stirring plate, 36-first sealing plate, 37-limiting groove, 38-second sealing plate, 39-limiting block, 310-limiting rod, 41-bottom plate, 42-support column, 43-support ring, 44-motor, 45-transmission belt. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] 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 invention claimed for protection, 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.

[0030] 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.

[0031] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present invention 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 present invention.

[0032] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Example

[0034] The following is further described in conjunction with specific embodiments. Figure 1 -Attached Fig.10The red mud efficient alkalizing device of this embodiment includes an outer tank body 11 with an open lower end and an inclined position, which is used to support the bracket of the outer tank body 11, and a driving device for driving the rotation of the outer tank body 11. It can be detached and installed in the inner tank body 21 inside the outer tank body 11 and open upper end, and the first connecting ring 12 at the lower end of the outer tank body 11, a second connecting ring 22 at the lower end of the inner tank body 21, and a barrel-shaped filter cloth 24 laid on the inner wall of the inner tank body 21. , a pressurization device provided at the upper end of the outer tank body 11, a feeding device provided at the upper end of the outer tank body 11, a plurality of spoilers 13 arranged in the outer tank body 11, and an extrusion ring 14 arranged at the lower end of the spoilers 13; the first connecting ring 12 is removably sealed and connected with the second connecting ring 22, and the multiple spoilers 13 are distributed in a circumferential manner, the spoilers 13 are in contact with the filter cloth 24 of the inner side wall of the inner tank body 21, and the pressing ring 14 is used to squeeze the filter cloth 24 of the inner bottom wall of the inner tank body 21. Specifically, during use, the empty inner tank body 21 is stuffed into the outer tank body 11, and then the first connecting ring 12 and the second connecting ring 22 are connected with bolts and nuts. At this time, the spoiler 13 and the extrusion ring 14 will squeeze the filter cloth 24 in the inner tank body 21, so that the filter cloth 24 is close to the inner wall of the inner tank body 21, and then red mud, lime mortar (or calcium carbide) is poured into the filter cloth 24 of the inner tank body 21 through the feeding device. Then, the outer tank 11 and the inner tank 21 are driven to rotate. During the rotation process, the spoiler plate 13 will play a spoiler and agitate on the slurry, so that the red mud and lime are mixed evenly. After a certain period of time, the rotation is stopped. The air compressor is used to connect the pressurization device (air intake pipe 15) on the outer tank 11 to pressurize the outer tank 11. After the pressurization is completed, the outer tank 11 and the inner tank 21 are driven again to rotate, so that the red mud and lime continue to react at one end under high pressure, and finally release the pressure, the first connecting ring 12 and the second connecting ring 22 are removed, the inner tank 21 is taken out, and the filter cloth 24 is lifted to filter the slurry. In this way, the device completes normal pressure mixing, high pressure mixing, and filtration in the same equipment. There is no need to transport the slurry back and forth between multiple equipments, and only needs to clean the filter cloth 24 at a time (the cleaned filter cloth 24 can be quickly replaced), which can significantly reduce the number of equipment and improve the processing efficiency of red mud. Among them, since there is no material inside the inner tank 21 before being stuffed into the outer tank 11, its weight is not heavy. It can be lifted manually, or equipment such as a lifter can be used. When removing the inner tank 21, since it contains slurry inside, it is necessary to use a lifter to assist in the removal. Moreover, red mud and lime mortar are different raw materials, so they need to be poured into the inner tank body 21 through the feeding device respectively.

[0035] The feeding device in this embodiment includes a slide bar 31 sealed and slidably connected to the upper end wall of the outer tank body 11, a feeding channel 32 provided inside the upper end of the slide bar 31, a material sprinkling hole 34 provided on the side wall of the slide bar 31, and a feeding pipe 33 provided on the side wall of the upper end of the slide bar 31; the feeding pipe 33 is connected to the upper end of the feeding channel 32, and the material sprinkling hole 34 is connected to the lower end of the feeding channel 32. Specifically, when feeding, the external pipeline for transmitting red mud or lime slurry is connected to the feeding pipe 33, and the slide bar 31 is moved downward so that the material sprinkling hole 34 is located at the upper end of the inner tank body 21. Then the filling can be started. Red mud can be poured first, and after the red mud is poured, the feed pipe 33 is connected to the pipeline for conveying lime slurry, and then the lime slurry is poured. During the process of pouring lime slurry, the driving device can be used to drive the outer tank body 11 to rotate. At this time, the lime slurry poured into the inner tank body 21 can be better mixed with the red mud, and because the slide bar 31 is rotatably connected to the outer tank body 11, the rotation of the outer tank body 11 will not affect the filling process of the slide bar 31. When the lime slurry filling is completed and before the high-pressure reaction is required, the slide bar 31 is moved upward so that the material sprinkling hole 34 on the slide bar 31 is located outside the outer tank body 11, so that when the air compressor is used for pressurization, the gas will not leak through the slide bar 31.

[0036] The feeding device in this embodiment also includes a limit rod 310 connected to the bracket, and a stirring blade 35 provided at the lower end of the slide rod 31; the limit rod 310 is a telescopic structure, and the limit rod 310 and the feed pipe 33 are detachably connected. Specifically, during the normal pressure stirring process, the limit rod 310 can be connected to the feed pipe 33, and the rotation of the slide rod 31 is limited by the bracket, the limit rod 310 and the feed pipe 33. At this time, the inner tank body 21 and the outer tank body 11 are rotating, while the slide rod 31 and the stirring blade 35 are in a stationary state, so the two are in relative motion, and the stirring blade 35 can stir the slurry (such as the attached Figure 1 and 3 When the normal pressure stirring is finished, the limiting rod 310 can be removed from the feeding pipe 33.

[0037] The feeding device in this embodiment also includes a first sealing plate 36 arranged on the slide bar 31, a plurality of limit grooves 37 opened on the edge of the first sealing plate 36, a second sealing plate 38 arranged on the inner top wall of the outer tank body 11, and a plurality of limit blocks 39 arranged on the edge of the second sealing plate 38; the limit blocks 39 correspond to the limit grooves 37 one by one; the first sealing plate 36 is arranged inside the outer tank body 11; the material sprinkling hole 34 passes through the slide bar 31, and a latch rod is detachably provided in the material sprinkling hole 34, and the latch rod is arranged on the outer top wall of the outer tank body 11. Specifically, since high-pressure stirring needs to last for a certain period of time, and it is impossible to pressurize in real time during the rotation of the inner tank body 21 and the outer tank body 11, sealing is very important. A sealing gasket can be set between the first connecting ring 12 and the second connecting ring 22. The first sealing plate 36 can also be placed close to the second sealing plate 38, and a sealing gasket can be arranged between the two, so that the connection between the sliding rod 31 and the outer tank body 11 can be sealed. Figure 2 and 4 As shown in the figure, the slide bar 31 can be fixed by inserting the latch rod into the material sprinkling hole 34. Since a rubber sealing pad is provided between the first sealing plate 36 and the second sealing plate 38, the slide bar 31 has a sealing effect within a certain range, and when high pressure is applied, the first sealing plate 36 will be tightly attached to the second sealing plate 38 under pressure. After the limit block 39 is inserted into the limit groove 37, the slide bar 31 and the outer tank body 11 will no longer rotate relative to each other.

[0038] The lower end wall of the inner tank body 21 in this embodiment is provided with a drain pipe 27, and a valve is provided on the drain pipe 27. The inner bottom wall of the inner tank body 21 is provided with a filter plate 26, and the filter plate 26 is arranged between the inner bottom wall of the inner tank body 21 and the filter cloth 24. Specifically, after the complete reaction is completed, the inner tank body 21 in the outer tank body 11 stops rotating, and the valve on the drain pipe 27 can be slowly opened. At this time, the inner tank body 11 is still in a high-pressure state. At this time, under the action of pressure, the water in the slurry is squeezed and will pass through the filter cloth 24 and the filter plate 26 and then be discharged from the drain pipe 27. If there is still some water that has not been filtered out before the air pressure is completely unloaded, an external air compressor can be connected to continue to filter the water out. In this way, when the inner tank body 21 is taken out, since the water that accounts for a large proportion of the interior has been discharged in advance, it is lighter and can be taken out more easily. And after taking it out, there is no need to perform filtering operation again, and subsequent treatment such as drying can be directly carried out.

[0039] In this embodiment, the outer wall of the inner tank body 21 is provided with a plurality of connecting posts 23, the upper end of the filter cloth 24 passes around the upper end of the inner tank body 21 and is attached to the outer wall of the inner tank body 21, and the end of the filter cloth 24 is provided with a plurality of connecting ropes 25, which are connected to the connecting posts 23; the connecting ropes 25 are made of elastic material. Specifically, the filter cloth 24 can be well tightened by the elastic connecting ropes 25, and the connecting ropes 25 can be removed from the connecting posts 23.

[0040] The bracket in this embodiment includes a base plate 41, a pair of pillars arranged on the base plate 41, a ring 16 fixed to the outer wall of the outer tank body 11, and a support ring 43 rotatably connected to the ring 16; the upper ends of the pair of pillars are connected to the support ring 43.

[0041] The driving device in this embodiment includes a motor 44 disposed on the bottom plate 41, a driving wheel disposed on the output shaft of the motor 44, and a transmission belt 45 for connecting the driving wheel and the outer wall of the tank body. Specifically, a driven wheel connected to the transmission belt 45 needs to be disposed on the outer wall of the outer tank body 11. In addition to using the transmission belt 45 for driving, gears and other structures can also be used for driving.

[0042] In this embodiment, the inner wall of the outer tank body 11 is provided with a heating wire, which is convenient for heating the material in the inner tank body 21 to improve its reaction efficiency.

[0043] In summary, the red mud high-efficiency dealkalization device of this embodiment, when in use, inserts the empty inner tank body 21 into the outer tank body 11, and then uses bolts and nuts to connect the first connecting ring 12 and the second connecting ring 22. At this time, the spoiler 13 and the extrusion ring 14 will squeeze the filter cloth 24 in the inner tank body 21, so that the filter cloth 24 is tightly attached to the inner wall of the inner tank body 21, and then the red mud and lime slurry (or calcium carbide) are poured into the filter cloth 24 of the inner tank body 21 through the feeding device. Then, the driving device is used to drive the outer tank body 11 and the inner tank body 21 to rotate. During the rotation process, the spoiler 13 will play a role of disturbing and stirring the slurry, so that the red mud and lime are evenly mixed. After a certain period of time, the rotation is stopped, and the air compressor is used to connect the pressurizing device (inlet pipe 15) on the outer tank body 11 to pressurize the outer tank body 11. After the pressurization is completed, the outer tank body 11 and the inner tank body 21 are driven to rotate again, so that the red mud and lime continue to react under high pressure for a period of time, and finally the pressure is released, the first connecting ring 12 and the second connecting ring 22 are disassembled, the inner tank body 21 is taken out, and the filter cloth 24 is directly lifted to filter the slurry. In this way, the device completes normal pressure mixing, high pressure mixing, and filtering in the same device, and there is no need to transport the slurry back and forth between multiple devices, and only the filter cloth 24 needs to be cleaned each time (the cleaned filter cloth 24 can be quickly replaced), which can significantly reduce the number of equipment and improve the treatment efficiency of red mud.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A red mud efficient dealkalization device, Features: The invention comprises an outer tank body (11) with an opening at the lower end and arranged obliquely, a bracket for supporting the outer tank body (11), a driving device for driving the outer tank body (11) to rotate, an inner tank body (21) detachably arranged inside the outer tank body (11) and with an opening at the upper end, a first connecting ring (12) arranged at the lower end of the outer tank body (11), a second connecting ring (22) arranged at the lower end of the inner tank body (21), a barrel-shaped filter cloth (24) laid on the inner wall of the inner tank body (21), a pressurizing device arranged at the upper end of the outer tank body (11), a feeding device arranged at the upper end of the outer tank body (11), a plurality of spoilers (13) arranged in the outer tank body (11), and a squeezing ring (14) arranged at the lower end of the spoiler (13); The first connecting ring (12) and the second connecting ring (22) are detachably sealed and connected, the plurality of spoilers (13) are circumferentially distributed, the spoilers (13) abut against the filter cloth (24) on the inner side wall of the inner tank body (21), and the pressure ring (14) is used to squeeze the filter cloth (24) on the inner bottom wall of the inner tank body (21).

2. The red mud efficient dealkalization device according to claim 1, Features: The feeding device comprises a sliding rod (31) sealingly and slidably connected to the upper end wall of the outer tank body (11), a feeding channel (32) arranged inside the upper end of the sliding rod (31), a material sprinkling hole (34) arranged on the side wall of the sliding rod (31), and a feeding pipe (33) arranged on the side wall of the upper end of the sliding rod (31); The feed pipe (33) is connected to the upper end of the feed channel (32), and the sprinkler hole (34) is communicated with the lower end of the feed channel (32).

3. The red mud efficient dealkalization device according to claim 2, Features: The feeding device also includes a limiting rod (310) connected to the bracket, and a stirring piece (35) arranged at the lower end of the sliding rod (31); the limiting rod (310) is a telescopic structure, and the limiting rod (310) is detachably connected to the feeding pipe (33).

4. The red mud efficient dealkalization device according to claim 3, Features: The feeding device further comprises a first sealing plate (36) arranged on the sliding rod (31), a plurality of limiting grooves (37) opened on the edge of the first sealing plate (36), a second sealing plate (38) arranged on the inner top wall of the outer tank body (11), and a plurality of limiting blocks (39) arranged on the edge of the second sealing plate (38); the limiting blocks (39) correspond to the limiting grooves (37) one by one; the first sealing plate (36) is arranged inside the outer tank body (11); The material sprinkling hole (34) passes through the sliding rod (31), and a latch rod is detachably provided in the material sprinkling hole (34), and the latch rod is arranged on the outer top wall of the outer tank body (11).

5. The red mud efficient dealkalization device according to claim 1, Features: A drainage pipe (27) is provided on the lower end wall of the inner tank body (21), and a valve is provided on the drainage pipe (27).

6. The red mud efficient dealkalization device according to claim 5, Features: The inner bottom wall of the inner tank body (21) is provided with a filter plate (26), and the filter plate (26) is arranged between the inner bottom wall of the inner tank body (21) and the filter cloth (24).

7. The red mud efficient dealkalization device according to claim 1, Features: The outer wall of the inner tank body (21) is provided with a plurality of connecting columns (23); the upper end of the filter cloth (24) passes around the upper end of the inner tank body (21) and is attached to the outer wall of the inner tank body (21); the end of the filter cloth (24) is provided with a plurality of connecting ropes (25); the connecting ropes (25) are connected to the connecting columns (23); and the connecting ropes (25) are made of an elastic material.

8. The red mud efficient dealkalization device according to claim 1, Features: The bracket comprises a bottom plate (41), a pair of pillars arranged on the bottom plate (41), a collar (16) fixedly arranged on the outer wall of the outer tank body (11), and a support ring (43) rotatably connected to the collar (16); the upper ends of the pair of pillars are both connected to the support ring (43).

9. The red mud efficient dealkalization device according to claim 8, Features: The driving device comprises a motor (44) arranged on the bottom plate (41), a driving wheel arranged on the output shaft of the motor (44), and a transmission belt (45) for connecting the driving wheel and the outer wall of the tank body.

10. The red mud efficient dealkalization device according to claim 1, Features: The inner wall of the outer tank body (11) is provided with an electric heating wire.

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