Red mud filter-pressing dehydration system

Abstract

The utility model discloses a red mud filter-pressing dehydration system. The red mud filter-pressing dehydration system comprises a conveying pump, a mixing tank, a plate-and-frame filter press and a conveying belt, wherein a homogeneous stirring piece and a viscosity detector are arranged in the mixing tank; an auxiliary discharging mechanism is supported above the plate-and-frame filter press; a material guide mechanism is arranged between the plate-and-frame filter press and the conveying belt; the homogeneous stirring piece is composed of arc-shaped hollow stirring blades, and a scraping and sweeping piece is arranged between every two vertically adjacent arc-shaped hollow stirring blades; the auxiliary discharging mechanism intermittently moves along the length direction of the plate-and-frame filter press, so that a filter cake is pushed downwards after adjacent filter plates are separated; the material guiding mechanism comprises a material guiding box and a material guiding slope connected with the bottom end of one side of the material guiding box, and a conveying belt is arranged on the outer side of the bottom end of the material guiding slope. According to the red mud filter-pressing dehydration system, the working efficiency is improved, the difficulty caused by the quality difference of red mud slurry to the subsequent discharging operation of the plate-and-frame filter press is avoided, the whole system is smoother in feeding, filter-pressing, discharging, guiding and conveying, and each link of the system is easy to control.

Description

Technical Field

[0001] The utility model relates to a red mud filter press dehydration system. Background Art

[0002] With the development of industrialized nations, the annual discharge of industrial solid waste is currently enormous. Red mud, as a type of industrial solid waste, has limited comprehensive utilization, leading to its accumulation. This potentially poses a threat to the ecological environment and imposes a significant economic burden on aluminum production companies. The comprehensive treatment and utilization of red mud has become a pressing new challenge in the treatment of industrial solid waste.

[0003] The comprehensive utilization of red mud is currently mostly used for highway base materials, and it is prepared into red mud-based cementitious materials. In the early stage, the red mud waste needs to be separated, cleaned, pumped, and filtered to make red mud cakes, so as to facilitate transportation to the required site for stacking. The red mud filter pressing process mainly filters and dehydrates the red mud to ensure a low moisture content in the filter cake. The treatment before and after filter pressing and dehydration includes mixing and pumping the red mud slurry, as well as discharging and transporting the red mud cake. At present, different batches of red mud slurries have differences in viscosity and homogenization due to differences in treatment effects, which directly affects the subsequent pumping efficiency and the quality of the filter cake after filtration. In particular, when the viscosity is high, the filter cake is not easy to fall off after dehydration and filtration, resulting in production restrictions and suspensions. Workers are required to shovel mud on site, which increases extra workload and is time-consuming and labor-intensive.

[0004] In addition, after the filter press dewatering treatment, the unloaded red mud filter cake in the existing treatment site falls directly onto the open space below the filter press or onto the conveyor belt. The direct accumulation causes troubles in the subsequent collection and transportation of materials, and increases the workload of transportation; especially for the production requirements of red mud cake with relatively low water content requirements, directly collecting it on the conveyor belt is more likely to cause impact or damage to the conveyor belt. Utility Model Content

[0005] In order to solve the above problems, the utility model proposes a red mud filter press dewatering system, which improves work efficiency and reduces the difficulties caused by the quality differences of red mud slurry on the subsequent plate and frame filter press unloading operation. The entire system's loading, filtration, unloading, and material conveying are smoother, and it is easy to control all aspects of the system, solving the problems existing in the existing technology.

[0006] The utility model provides the following technical solutions:

[0007] A red mud filter press dewatering system includes a feed pump, a mixing tank, a plate-and-frame filter press, and a conveyor belt. The system is characterized in that a homogenizing stirring element and a viscosity detector are provided in the mixing tank; an auxiliary unloading mechanism is supported above the plate-and-frame filter press; and a material guiding mechanism is provided between the plate-and-frame filter press and the conveyor belt.

[0008] The homogenizing stirring element is composed of arc-shaped hollow stirring blades, and a scraping element is arranged between the upper and lower adjacent arc-shaped hollow stirring blades; the auxiliary unloading mechanism moves periodically along the length direction of the plate and frame filter press to push the filter cake downward after the adjacent filter plates are separated; the material guiding mechanism includes a material guiding box and a material guiding slope connected to the bottom end of one side of the material guiding box, and the conveyor belt is arranged on the outside of the bottom end of the material guiding slope.

[0009] Furthermore, a controller is provided outside the plate and frame filter press, and the controller is electrically connected to the feed pump, the plate and frame filter press, the viscosity detector and the auxiliary unloading mechanism.

[0010] Furthermore, the controller controls the feed pump to realize the red mud slurry transportation, the controller is connected to the electrical system and hydraulic system of the plate and frame filter press to control the operation of the plate and frame filter press, and the controller receives the viscosity detector signal to start the auxiliary unloading mechanism.

[0011] Furthermore, the controller is a PLC controller.

[0012] Furthermore, the auxiliary unloading mechanism includes a sliding beam supported above the plate and frame filter press, a slider is arranged in the sliding beam, and a shovel plate is connected to the bottom end of the slider through the cylinder body. The height of the shovel plate is not less than 2 / 3 of the side length of the filter plate of the plate and frame filter press.

[0013] Furthermore, the shovel plate includes an upper plate and a side plate arranged on one side of the bottom end of the upper plate, the bottom end of the side plate is arranged lower than the bottom end of the upper plate, the side plate is used to first contact the filter cake on the outside of the filter plate and after gradually inserting into the space between the filter cake and the filter plate, the bottom end of the upper plate cooperates with the side plate to continue pushing the filter cake down; the bottom end of the side plate is arranged in a thin triangular shape.

[0014] Furthermore, the thickness of the upper plate is not less than the width of the filter chamber between adjacent filter plates in the plate and frame filter press in the filtering state. In this way, it can be ensured that when the side plates are lowered, the upper plate can fully press down the top surface of the formed filter cake, achieving more effective downward pressure.

[0015] Furthermore, a stepper motor is provided on one side of the sliding beam, the output shaft of the stepper motor is fixedly connected to a threaded rod provided in the sliding beam, and the sliding block is screwed in the sliding beam outside the threaded rod.

[0016] Furthermore, the stepper motor is electrically connected to the controller.

[0017] Furthermore, the plate and frame filter press is an existing plate and frame filter press structure, which mainly includes filter plates, a hydraulic system, a filter press frame, a filter plate transmission system and an electrical system; the hydraulic force is applied to compress the filter press plate and frame group, and the red mud slurry enters from the middle of the plate and frame filter press and is distributed between the filter cloths. Water seeps out from the filter cloths and flows into the return pipe, and the red mud filter cake remains in the filter chamber formed by the filter plates. After that, the plate and frame are depressurized, the filter plates are pulled apart, and the red mud cake falls by gravity. When the viscosity detector detects that the viscosity of the red mud slurry in the mixing tank exceeds the set value, the controller controls the auxiliary unloading mechanism to start. The controller controls the stepper motor of the auxiliary unloading mechanism so that after the corresponding filter plates are pulled apart, the slider moves a certain distance and the shovel plate below it is directly above the filter plates and the filter cakes attached thereto. The shovel plate moves downward to assist in pushing the filter cakes that are difficult to fall automatically by gravity alone.

[0018] Furthermore, the feed pump includes a feed pump connected to the mixing tank and a feed pump arranged between the mixing tank and the plate and frame filter press. Flow regulating valves are arranged on the pipeline connecting the feed pump and the mixing tank, the pipeline connecting the mixing tank and the feed pump, and the pipeline connecting the feed pump and the plate and frame filter press.

[0019] Furthermore, each of the above-mentioned flow regulating valves is electrically connected to the controller.

[0020] Furthermore, the arc-shaped hollow stirring blade is a sheet-like blade with an arc-shaped outer side, and a number of circular holes are evenly distributed on the sheet-like blade. The two arc-shaped hollow stirring blades are horizontally mirrored, and the upper and lower adjacent arc-shaped hollow stirring blades on the same side are horizontally mirrored; the scraping member includes a horizontal stirring rod and a scraper provided at the outer end of the horizontal stirring rod, and the outer side of the scraper is gap-matched with the inner wall of the mixing tank.

[0021] Furthermore, the mixing tank is a mixing tank, a stirring rod is arranged in the mixing tank, the stirring rod is driven by a stirring motor, and the arc-shaped hollow stirring blade is arranged on the stirring rod.

[0022] Furthermore, the horizontal stirring rod is arranged perpendicularly to the arc-shaped hollow stirring blades, and the horizontal stirring rod and the arc-shaped hollow stirring blades are alternately arranged in the height direction of the stirring shaft arranged in the mixing tank.

[0023] Furthermore, the material guide box is a box body with an inclined outer wall, a first slope is set on the bottom surface of the box body, the side wall of the material guide box above the bottom end of the first slope is open, and a second slope is set on the outside of the material guide box, the second slope is smoothly transitioned to the first slope, and the slope of the first slope is greater than the slope of the second slope.

[0024] Furthermore, a guard plate is provided on the outer side of the second slope.

[0025] Furthermore, by setting up the material guide box and the second slope, the filter cake in the limited space below the plate and frame filter press is effectively and timely removed, avoiding the trouble of feeding caused by accumulation as in the existing situation, and avoiding the direct impact and damage of the conveyor belt by the fallen filter cake when directly transporting the filter cake by the conveyor belt below. It also avoids the construction workload of setting up the plate and frame filter press at a certain height in order to increase the space for holding the filter cake below.

[0026] Furthermore, the second slope is set as a crawler-type or chain-type conveying slope to increase the speed of guiding the material to the conveyor belt and improve work efficiency.

[0027] The red mud filter press dewatering system proposed in this application can bring the following beneficial effects:

[0028] 1. Based on the existing filter press dehydration production, the red mud filter press dehydration system of this utility model improves the stirring efficiency inside the mixing tank, assists the unloading of the plate and frame filter press, and designs the pre-feeding guide material. This makes the loading, filter press dehydration, unloading and transportation of the entire system smoother and easier to control.

[0029] 2. Specifically, the red mud filter press dewatering system of the present invention can avoid the problems of slurry scarring, sedimentation, and increased pumping burden over a long period of time by adding a homogenizing stirring piece in the mixing tank. The setting of the viscosity detector in the mixing tank can control the quality of the red mud slurry. According to the actual needs of the process, it can be selected to add additives or control the activation of the auxiliary unloading mechanism after filter press dewatering in combination with the viscosity results, thereby avoiding the trouble of the filter cake not being able to fall directly by gravity after dehydration, and reducing the workload of manual cake shoveling. During the feeding stage, the coordination of the feeding pump, the feed pump and the flow regulating valve can ensure stable feeding, so that the delivery speed of the red mud slurry entering the plate and frame filter press is stable, thereby ensuring the stability of the filter cake quality obtained by filtration. By arranging an auxiliary unloading mechanism above the plate and frame filter press and starting it when needed, the coordination of its side plate and the upper plate forms a right-angled downward pressure structure, which is convenient for effectively pushing the filter cake downward. By adding a material guide mechanism between the plate and frame filter press and the conveyor belt, the filter cake in the limited space below the plate and frame filter press is effectively and timely removed, avoiding the trouble of feeding caused by accumulation as in the existing situation, and avoiding the direct impact and damage of the conveyor belt by the fallen filter cake when directly transporting the filter cake using the conveyor belt below. It also avoids the construction workload of setting up the plate and frame filter press at a certain height to increase the space for holding the filter cake below. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present application and do not constitute an improper limitation of the present invention. In the drawings:

[0031] Figure 1 It is a structural diagram of the utility model;

[0032] Figure 2 for Figure 1 Schematic diagram of the structure of the mixing tank;

[0033] Figure 3 for Figure 2 Schematic diagram of the structure of the middle arc-shaped hollow stirring blade and the scraping member;

[0034] Figure 4 for Figure 1 Schematic diagram of the enlarged structure of the middle shovel plate position;

[0035] Figure 5 for Figure 1 Schematic diagram of the side structure of the middle material guide mechanism.

[0036] Among them, 1 feed pump, 101 feed pump, 102 feed pump, 2 mixing tank, 3 plate and frame filter press, 4 conveyor belt, 5 viscosity detector, 6 arc-shaped hollow stirring blade, 7 auxiliary unloading mechanism, 701 sliding beam, 702 slider, 703 shovel plate, 7031 upper plate, 7032 side plate, 704 stepping motor, 705 threaded rod, 8 material guide box, 801 first slope, 9 material guide slope, 901 second slope, 902 guard plate, 10 flow regulating valve, 11 horizontal stirring rod, 12 scraper, 13 controller. DETAILED DESCRIPTION

[0037] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0038] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0039] like Figure 1-5The figure shows the structure of the red mud filter press dewatering system. Specifically, the system includes a feed pump 1, a mixing tank 2, a plate and frame filter press 3 and a conveyor belt 4 arranged in sequence; a homogenizing stirring member and a viscosity detector 5 are arranged in the mixing tank 2; the homogenizing stirring member is composed of an arc-shaped hollow stirring blade 6, and a scraper is arranged between the upper and lower adjacent arc-shaped hollow stirring blades. An auxiliary unloading mechanism 7 is supported above the plate and frame filter press 3. The auxiliary unloading mechanism moves periodically along the length direction of the plate and frame filter press to push the filter cake downward after the adjacent filter plates are separated; a material guide mechanism is arranged between the plate and frame filter press and the conveyor belt. The material guide mechanism includes a material guide box 8 and a material guide slope 9 connected to the bottom end of one side of the material guide box, and the conveyor belt 4 is arranged outside the bottom end of the material guide slope.

[0040] A controller 13 is provided outside the plate and frame filter press 3 and is electrically connected to the feed pump 1, the plate and frame filter press 3, the viscosity detector 5, and the auxiliary discharge mechanism 7. The controller controls the feed pump to deliver the red mud slurry and also controls the plate and frame filter press to activate the auxiliary discharge mechanism.

[0041] The plate and frame filter press 3 used in this system is an existing plate and frame filter press structure, mainly including filter plates, a hydraulic system, a filter press frame, a filter plate transmission system, and an electrical system. Hydraulic force is applied to compress the filter press plate and frame assembly, and red mud slurry enters from the center of the plate and frame filter press and is distributed between the filter cloths of each filter plate. Water seeps through the filter cloths and flows into the return pipe, leaving the red mud filter cake in the filter chamber formed by the filter plates. The plate and frame are then depressurized, and the filter plates are sequentially pulled apart by a pulling device, and the red mud cake falls by gravity. To address the problem that the red mud cake sometimes fails to fall automatically due to the increased viscosity of the red mud slurry after the filter plates are pulled apart, the aforementioned viscosity detector 5 for detecting the slurry viscosity is provided during the red mud feeding stage and placed in the mixing tank, thereby achieving viscosity control of the red mud slurry processed in different batches. In addition, during the red mud cake unloading stage, the aforementioned auxiliary unloading mechanism 7 is provided above the pulled apart filter plates to assist in pushing the mud cake downward. When the viscosity detector 5 detects that the viscosity of the red mud slurry in the mixing tank 2 exceeds a set value, the controller controls the auxiliary unloading mechanism 7 to start. The controller controls the stepper motor of the auxiliary unloading mechanism so that after the corresponding filter plates are pulled apart, the slider moves a certain distance so that the shovel plate below it is directly above the filter plates and the filter cakes attached to them. The shovel plate moves downward to assist in pushing down the filter cakes that would be difficult to fall automatically by gravity alone.

[0042] The auxiliary unloading mechanism 7 comprises a sliding beam 701 supported above the plate-and-frame filter press. A slider 702 is positioned within the beam, and a shovel plate 703 is connected to the bottom of the slider via a cylinder. The shovel plate's height is no less than two-thirds of the side length of the filter plates of the plate-and-frame filter press. The shovel plate 703 comprises an upper plate 7031 and a side plate 7032 positioned to one side of the bottom of the upper plate. The side plate's bottom end is positioned lower than the bottom of the upper plate. The side plate initially contacts the filter cake outside the filter plate and then, after gradually inserting between the filter cake and the filter plate, cooperates with the side plate to further push the filter cake downward. The bottom end of the side plate is configured in a thin, triangular shape. The thickness of the upper plate is no less than the width of the filter chamber between adjacent filter plates in the plate-and-frame filter press's filtration state. This ensures that when the side plate descends, the upper plate can fully press down on the top surface of the filter cake, achieving more effective downward pressure.

[0043] A stepper motor 704 is provided on one side of the sliding beam 701, and the output shaft of the stepper motor is fixedly connected to a threaded rod 705 provided in the sliding beam, and the slider 702 is screwed into the sliding beam outside the threaded rod. The stepper motor is electrically connected to a controller.

[0044] The above-mentioned feed pump 1 includes a feed pump 101 connected to the mixing tank and a feed pump 102 arranged between the mixing tank 2 and the plate and frame filter press 3. A flow regulating valve 10 is arranged on the pipeline connecting the feed pump and the mixing tank, the pipeline connecting the mixing tank and the feed pump, and the pipeline connecting the feed pump and the plate and frame filter press. The flow regulating valve is electrically connected to the controller.

[0045] The aforementioned mixing tank 2 is a mixing tank, in which a stirring rod is installed. The stirring rod is driven by a stirring motor, and the arc-shaped hollow stirring blade is installed on the stirring rod. The arc-shaped hollow stirring blade 5 is a sheet-shaped blade with a curved outer surface. A number of circular holes are evenly distributed on the sheet-shaped blade. The two arc-shaped hollow stirring blades are arranged horizontally as mirror images, and the upper and lower adjacent arc-shaped hollow stirring blades on the same side are arranged horizontally as mirror images. The scraping member includes a horizontal stirring rod 11 and a scraper 12 arranged at the outer end of the horizontal stirring rod. The outer side of the scraper is in a gap with the inner wall of the mixing tank. The horizontal stirring rod is arranged perpendicular to the arc-shaped hollow stirring blade, and the horizontal stirring rod and the arc-shaped hollow stirring blade are arranged alternately in the height direction of the stirring shaft installed in the mixing tank.

[0046] The aforementioned material guide box 8 is a box with inclined outer walls. A first slope 801 is provided on the bottom of the box. The side wall of the material guide box above the bottom of the first slope is open. A second slope 901 is provided on the outside of the material guide box. The second slope smoothly transitions with the first slope, and the first slope is greater than the second slope. A protective plate 902 is provided on the outside of the second slope to prevent the filter cake from falling during the material guiding process.

[0047] By setting the material guide box 8, the first slope 801 and the second slope 901, the filter cake in the limited height space below the plate and frame filter press 3 is effectively and timely removed, avoiding the trouble of feeding caused by accumulation as in the existing situation, and avoiding the direct impact and damage of the conveyor belt by the fallen filter cake when directly transporting the filter cake by the conveyor belt below. It also avoids the construction workload of setting up the plate and frame filter press at a certain height to increase the space for holding the filter cake below.

[0048] Working principle:

[0049] Red mud separated from existing alumina production lines is subjected to multiple backwashes to produce a red mud slurry. This is then fed by a feed pump 1 into a mixing tank 2. Within the mixing tank, arc-shaped hollow stirring blades 6, a homogenizing stirring element mounted on the stirring rod, achieve more thorough dispersion of the red mud slurry, reducing subsequent slurry transport pressure and ensuring the quality of the filter cake produced during filter pressing and dewatering. These arc-shaped hollow stirring blades are arranged at the same level on the stirring rod, mirror-imaged and spaced apart, with opposite arc surfaces. This arrangement disperses the slurry during mixing while minimizing the impact of the same arrangement on the blades' rotational resistance. The dispersed red mud slurry in the mixing tank is then fed to a plate-and-frame filter press 3 via a feed pump 102. A controller controls the flow control valves on the aforementioned conveying line to ensure stable delivery and maintain a stable pressure on the red mud slurry entering the plate-and-frame filter press. This stabilizes the pressure and distributes the slurry between the filter cloths of the filter plates. Water seeps through the filter cloths and flows into the return pipe, leaving the red mud filter cake within the filter chamber formed by the filter plates. After dehydration by filtration, the filter plates are sequentially separated by a pulling mechanism, allowing the filter cake attached to the separated plates to fall freely under gravity. The falling filter cake enters the guide box 8, where it is guided by the steeper slope of the first slope 801 and moves toward the open outer side of the guide box. It then enters the second slope 901, gradually descending along the second slope until it is transported to the conveyor belt for the next process step. For dry filter cake with a low moisture content after dehydration, the guide box and slope structure prevent direct impact and damage to the conveyor belt and facilitate efficient discharge of the filter cake.

[0050] When the viscosity of the red mud slurry is high, the filter cake cannot be guaranteed to fall completely freely at the extreme point of discharge. This is achieved through the cooperation of the viscosity detector 5, the controller, the auxiliary discharge mechanism 7, and the plate and frame filter press 3. Specifically, when the viscosity detector detects that the viscosity of the corresponding batch of slurry in the mixing tank 2 is high and exceeds the set value, it transmits a signal to the controller. After receiving the signal, the controller controls the activation of the auxiliary discharge mechanism 7 during the filter plate separation stage after filtration and dehydration in the plate and frame filter press 3. That is, after each filter plate is opened by the opening device of the plate and frame filter press, the controller controls the stepper motor 704 to rotate the threaded rod 705 on the sliding beam 701 under the stepper motor, driving the slider 706 to move a corresponding distance along the sliding beam until it is positioned above the side of the opened filter plate with the filter cake. The shovel plate provided under the slider can be driven by the cylinder to complete the downward push of the filter cake attached to the filter plate, thereby ensuring the normal discharge of the red mud filter cake. The side plate 7032 on one side of the shovel plate assists the bottom surface of the upper plate 7031, effectively separating the red mud filter cake from the sides of the filter plate. Operators can assist in removing any incompletely fallen filter cake, significantly reducing the workload of existing manual shoveling operations. As previously described, the fallen filter cake enters the material guide box 8 and, influenced by the design of the first and second slopes 801 and 901, is transported to the conveyor belt for the next process step.

[0051] As another embodiment, the second slope can be set as a crawler-type or chain-type dynamic conveying slope to increase the speed of guiding the material to the conveyor belt and improve work efficiency.

[0052] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

[0053] Anything not described in detail in the present invention is well known to those skilled in the art.

Claims

1. A red mud filter press dewatering system, comprising a feed pump, a mixing tank, a plate and frame filter press and a conveyor belt, characterized in that: A homogenizing stirring element and a viscosity detector are provided in the mixing tank; an auxiliary unloading mechanism is supported above the plate and frame filter press; and a material guiding mechanism is provided between the plate and frame filter press and the conveyor belt; The homogenizing stirring element is composed of arc-shaped hollow stirring blades, and a scraping element is arranged between the upper and lower adjacent arc-shaped hollow stirring blades; the auxiliary unloading mechanism moves periodically along the length direction of the plate and frame filter press to push the filter cake downward after the adjacent filter plates are separated; the material guiding mechanism includes a material guiding box and a material guiding slope connected to the bottom end of one side of the material guiding box, and the conveyor belt is arranged on the outside of the bottom end of the material guiding slope.

2. The red mud filter press dewatering system according to claim 1, characterized in that: A controller is arranged outside the plate and frame filter press, and the controller is electrically connected with the feed pump, the plate and frame filter press, the viscosity detector and the auxiliary unloading mechanism.

3. The red mud filter press dewatering system according to claim 1 or 2, characterized in that: The auxiliary unloading mechanism includes a sliding beam supported above the plate and frame filter press, a slider is arranged in the sliding beam, and a shovel plate is connected to the bottom end of the slider through the cylinder body. The height of the shovel plate is not less than 2 / 3 of the side length of the filter plate of the plate and frame filter press.

4. The red mud filter press dewatering system according to claim 3, characterized in that: The shovel plate includes an upper plate and a side plate arranged on one side of the bottom end of the upper plate. The bottom end of the side plate is arranged lower than the bottom end of the upper plate. The side plate is used to first contact the filter cake on the outside of the filter plate and after gradually inserting into the space between the filter cake and the filter plate, the bottom end of the upper plate cooperates with the side plate to continue pushing the filter cake down; the bottom end of the side plate is arranged in a thin triangular shape.

5. The red mud filter press dewatering system according to claim 3, characterized in that: A stepper motor is arranged on one side of the sliding beam, the output shaft of the stepper motor is fixedly connected to a threaded rod arranged in the sliding beam, and the sliding block is screwed in the sliding beam outside the threaded rod.

6. The red mud filter press dewatering system according to claim 1, characterized in that: The feed pump includes a feed pump connected to the mixing tank and a feed pump arranged between the mixing tank and the plate and frame filter press. Flow regulating valves are arranged on the pipeline connecting the feed pump and the mixing tank, the pipeline connecting the mixing tank and the feed pump, and the pipeline connecting the feed pump and the plate and frame filter press.

7. The red mud filter press dewatering system according to claim 1, characterized in that: The arc-shaped hollow stirring blade is a sheet-like blade with an arc-shaped outer surface, and a plurality of circular holes are evenly distributed on the sheet-like blade. The two arc-shaped hollow stirring blades are horizontally mirrored, and the upper and lower adjacent arc-shaped hollow stirring blades on the same side are horizontally mirrored. The scraping member includes a horizontal stirring rod and a scraper provided at the outer end of the horizontal stirring rod, and the outer side of the scraper is gap-matched with the inner wall of the mixing tank.

8. The red mud filter press dewatering system according to claim 7, characterized in that: The horizontal stirring rod is perpendicular to the arc-shaped hollow stirring blade, and the horizontal stirring rod and the arc-shaped hollow stirring blade are alternately arranged in the height direction of the stirring shaft arranged in the mixing tank.

9. The red mud filter press dewatering system according to claim 1, characterized in that: The material guide box is a box body with an inclined outer wall. A first slope is set on the bottom surface of the box body. The side wall of the material guide box above the bottom end of the first slope is open. A second slope is set on the outside of the material guide box. The second slope transitions smoothly with the first slope, and the slope of the first slope is greater than the slope of the second slope.

10. The red mud filter press dewatering system according to claim 9, characterized in that: A guard plate is set on the outer side of the second slope.

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