Dry red mud argillization device and argillization method
By designing a dry red mud slurry device and employing methods such as high-pressure water gun wetting, low-pressure water gun immersion, and high-speed impeller cutting, the problem of dry red mud slurry treatment was solved, realizing the uniform mixing of red mud and mineral mud and the utilization of soil resources.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-28
- Publication Date
- 2026-03-24
AI Technical Summary
Existing technologies are insufficient for efficiently processing dry red mud into mud, making it difficult to mix red mud and mineral mud, which consumes land resources and poses environmental risks.
A dry red mud slurry device was designed, including a slurry chamber, a mixing tank A and a mixing tank B. Through high-pressure water gun wetting, low-pressure water gun immersion, horizontal spiral mixer and high-speed impeller cutting, the dry red mud is rapidly slurryed and finely granulated, ensuring that the red mud and mineral mud are evenly dispersed in the soil matrix.
It enables rapid mudification of dry red mud, improves the fluidity and particle size of mud slurry, ensures uniform dispersion of red mud ore in the soil matrix, and helps ecological restoration and soil resource utilization.
Smart Images
Figure CN121716201A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of dry red mud soilification technology in alumina production, specifically to a dry red mud soilification device and method. Background Technology
[0002] In the alumina production process, bauxite concentrate production generates washing mud, while alumina production from bauxite concentrate generates red mud. Currently, both domestically and internationally, washing mud is primarily stored in wet mud silos, while red mud, the smelting waste from alumina extraction, is dehydrated and then dry-compacted and stored. Both not only consume significant amounts of land resources but also pose substantial environmental risks. Dry mixing the dehydrated red mud and mud is extremely difficult due to their stickiness and compaction. However, if they are wet-mixed in a certain proportion, dehydrated, and then treated as soil and backfilled into the original mining pits, they can be transformed into soil and land resources after ecological restoration, which has significant practical implications for the "balance between land occupation and compensation" in mining operations.
[0003] How to quickly turn large quantities of red mud into mud is a key technical point. Only by efficiently realizing the mud-making process of dry red mud can the subsequent rapid mixing of red mud mud slurry and mineral mud be achieved, and then directly used for backfilling the original mining pit. Summary of the Invention
[0004] This invention aims to provide a device and method for converting dry red mud into mud slurry. This device and method can conveniently and quickly convert dry red mud into red mud slurry. The prepared mud slurry has good fluidity and fine particle size, ensuring that it is fully mixed, flocculated, coagulated, and settled with the slurry discharged from the centrifugal pump in the thickening tank in the subsequent slurry pipeline. This achieves uniform dispersion of red mud slurry in the soil matrix, which helps in the ecological restoration and resource utilization of red mud slurry soil.
[0005] The aforementioned dry red mud slurry processing device includes a slurry processing chamber and a mixing tank A; The mud-forming chamber is installed on the ground via a bracket, with its bottom higher than the top of the mixing tank A. A discharge platform is located next to the mud-forming chamber, allowing red mud transport vehicles to drive to the top of the chamber and park. The left and right side walls of the mud-forming chamber are inclined surfaces extending downwards from the outside in, while the front and rear side walls are vertical. The bottom of the mud-forming chamber is a horizontal plane, with a mixing trough running along the front-to-back direction in the center. The width of the bottom is 2-3 times the width of the mixing trough. A horizontal spiral mixer is installed in the mixing trough, with its conveying end located at the outlet of the mixing trough. The top of the mixing tank A is covered, and a mixing mechanism is installed inside. A water inlet pipe running clockwise tangentially is located on the lower part of the side wall of the mixing tank A, with its tail extending beyond the side wall of the mixing tank A and connected to a water source via a pipeline. A solenoid valve A is installed on the water inlet pipe. The top of the four side walls of the mud-forming chamber is provided with vertical protective plates. The protective plates are sealed and connected to each other to form a protective chamber. The top of the left or right protective plate is provided with a chamber top platform. A high-pressure water gun is provided on the chamber top platform. The tail of the high-pressure water gun is connected to the water source through a hose. A row of low-pressure water guns is fixedly installed at the upper, middle and lower parts of the two inclined planes. Each low-pressure water gun is set along the left and right direction, at an angle of 10-15° with the inclined plane. The low-pressure water guns are connected by water pipes and supplied with water from the top of the mud-forming chamber. The outlet of the mixing tank is connected to the sludge discharge trough, which extends horizontally to the top of the mixing tank A. The end of the sludge discharge trough is closed, and the bottom end of the sludge discharge trough passes through the discharge nozzle and enters the mixing tank A, discharging the material in the sludge discharge trough into the mixing tank A.
[0006] The angle between the inclined plane and the horizontal plane is 20°-30°.
[0007] The low-pressure water guns at the top and bottom of the two inclined planes are aligned one by one along the inclined plane direction, with a spacing of 0.6-0.8m between each low-pressure water gun. The distance between the low-pressure water guns located at the front and rear sides and the front and rear side walls is 0.6-0.8m respectively. The vertical height of the low-pressure water gun at the bottom of the inclined plane from the bottom surface of the mud-forming chamber is 0.3-0.6m. Along the slope direction, the lateral position of the low-pressure water gun in the middle of the two slopes is set at the midpoint between the adjacent points of the upper and lower two rows of low-pressure water guns on the slope.
[0008] Preferably, the high-pressure water gun and the low-pressure water are sourced from the dewatered liquid obtained by filtration of mineral mud.
[0009] The horizontal spiral mixer includes a variable frequency motor, a long shaft, and spiral conveying blades. The variable frequency motor is located outside the mixing tank at the end away from its outlet. The output shaft of the variable frequency motor is connected to the long shaft. The long shaft passes through the shaft hole in the side wall of the mixing tank and extends to the outlet of the mixing tank. A sealing ring is provided in the shaft hole. Spiral conveying blades are installed on the long shaft inside the mixing tank to stir the material in the mixing tank and convey it to the outlet.
[0010] The dry red mud sludge treatment device also includes a mixing tank B, which is located next to the mixing tank A. The mixing tank B and the mixing tank A are identical in position, shape and size. The bottom and waist of the mixing tank A are respectively provided with horizontal connecting pipes that connect to the bottom and waist of the mixing tank B. The mixing tank B is equipped with a mixing mechanism. The lower part of the side wall of the mixing tank B is provided with a water inlet pipe in a clockwise tangential direction. The end of the water inlet pipe extends out of the side wall of the mixing tank B and is connected to a water source through a pipeline. A solenoid valve A is provided on the water inlet pipe. The side walls of the mixing tanks A and B are provided with transparent observation windows.
[0011] The stirring mechanisms installed in stirring tanks A and B have the same structure and position, and both include a stirring motor, a stirring shaft, and impellers. The stirring motor is located in the middle of the outer wall of the top plate of stirring tank A or stirring tank B, and the output shaft of the stirring motor is set vertically downward, passing through the top plate of stirring tank A or stirring tank B into its tank body. The upper end of the stirring shaft is connected to the lower end of the output shaft of the stirring motor, and the lower end of the stirring shaft extends to the lower part of its tank body. Two or more layers of impellers are arranged on the stirring shaft at intervals, with one set of impellers located on the lower end of the stirring shaft. The diameter of the impeller is 1 / 4 to 1 / 3 of the inner diameter of stirring tank A or stirring tank B.
[0012] Multiple sets of cutting plates are evenly arranged counterclockwise on the inner walls of the mixing tanks A and B. Each set of cutting plates forms a 10-20° angle with the tangent of the inner wall of the mixing tank A or B at its location. Each set of cutting plates extends from the top to the bottom of the inner wall of the mixing tank A or B. The front end face of each set of cutting plates is ground into a blade shape.
[0013] The bottom of the outer wall of the mixing tank B is provided with a mud slurry conveying pipe, and a solenoid valve B is provided on the mud slurry conveying pipe. The mud slurry conveying pipe is connected to the sludge conveying pipe through a pipeline and a conveying pump. The mixing tank B is equipped with a mud level detector, which is set at the highest mud level. When mud slurry is detected, the control solenoid valve B is opened and the delivery pump is started to input the mud slurry into the ore conveying pipe, mix it with the ore slurry and send it to the next process.
[0014] This invention also discloses a method for drying red mud, utilizing the aforementioned dry red mud slurry apparatus, comprising the following steps: S1. Turn on all low-pressure water guns to spray water, start the horizontal spiral mixer in the mixing tank, and let the clean water enter the mixing tank A through the mud discharge trough, and then enter the mixing tank B through the connecting pipe. When the clean water level submerges the impeller at the lower end of the mixing shaft in the mixing tank B, turn on the mixing motors of mixing tank A and mixing tank B to drive the impeller to rotate clockwise. S2. Open the self-unloading device of the self-unloading red mud transport vehicle that was previously parked on the unloading platform next to the top of the mud silo, so that its cargo box is tilted and raised. When the tilt angle of its cargo box reaches 65° to 70°, turn on the high-pressure water gun and manually control it to rinse and initially wet the red mud on the cargo box until the unloading is completed. Then turn off the high-pressure water gun and keep spraying water from each low-pressure water gun. S3. Red mud is stirred in a mixing tank by a horizontal spiral mixer and fully mixed with water to form a preliminary mud slurry. It enters mixing tank A through the mud discharge trough from the outlet. The solenoid valve A of the water inlet pipe of mixing tank A is opened, and water is supplied in a clockwise tangential direction. In mixing tank A, the mixing shaft and impeller continuously stir and cut the mud at high speed, further mixing it with water. When it rises to the height of the connecting pipe, it enters mixing tank B. The solenoid valve A of the water inlet pipe of mixing tank B is opened, and water is supplied in a clockwise tangential direction. The mixing shaft and impeller of mixing tank B continuously stir and cut the mud at high speed, further mixing it. S4. Mixing tank A and mixing tank B work together through a connecting pipe until the mud slurry in mixing tank B comes into contact with the mud level detector. The mud level detector controls the solenoid valve B to open and the conveying pump to start, inputting the mud slurry into the ore conveying pipe, mixing it with the ore and sending it to the next process. The conveying speed of the conveying pump is consistent with the feeding speed of the horizontal screw mixer. S5. When the mud level in mixing tank A begins to gradually decrease and the mud entering from the upper layer becomes clear, close all low-pressure water guns and stop the horizontal spiral mixer. When the water level in mixing tank B is lower than the impeller at the bottom of the mixing shaft, close solenoid valves A and B of mixing tanks A and B and the delivery pump to stop the entire system.
[0015] In the above method, multiple sets of cutting plates are evenly arranged counterclockwise on the inner walls of mixing tanks A and B. Each set of cutting plates forms a 10-20° angle with the tangent of the inner wall of mixing tanks A and B at its location. The front end face of each set of cutting plates is ground into a blade shape. When the mixing mechanism is working in mixing tanks A and B, the red mud slurry is more effectively cut and collided, making it more uniformly mixed.
[0016] The beneficial effects of this invention are as follows: The equipment structure of this invention is scientifically and rationally designed. Through the reasonable layout of the unloading platform, mud-forming silo, and mixing tank A, it facilitates the convenient transportation, unloading, and mud-forming of dry red mud in large-scale production. This invention addresses the lumpy and fine-viscosity characteristics of dry red mud by using a high-pressure water gun for wetting, which simultaneously ensures safe unloading and initial wetting of the dry red mud at the silo inlet. A low-pressure water gun continuously wets and softens the red mud. Then, a slow-rotating long shaft drives a spiral impeller to cut and compress the red mud into a mud-forming slurry. Through high-speed impeller cutting, steel baffle cutting, and hydraulic cutting, the mud-forming red mud slurry is further refined and fluidized, improving its flow characteristics. This ensures thorough mixing, flocculation, coagulation, and sedimentation of the mud in the subsequent slurry pipeline with the slurry discharged from the centrifugal pump in the thickening tank. This achieves uniform dispersion of the red mud in the soil matrix, contributing to the ecological restoration and resource utilization of the red mud. Attached Figure Description
[0017] Figure 1 A schematic diagram of the dry red mud sludge processing device; Figure 2 This is a schematic diagram of the mud-forming chamber. Figure 3 A top view of the internal structure of mixing tank A and mixing tank B; Figure 4 Cross-sectional views of mixing tank A and mixing tank B; The names and numbers in the diagram are as follows: 1-Mudification bin, 2-Mixing tank A, 3-Inclined surface, 4-Bottom surface, 5-Mixing trough, 6-Water inlet pipe, 7-Guard plate, 8-Binding platform, 9-High-pressure water gun, 10-Hose, 11-Low-pressure water gun, 12-Mud discharge trough, 13-Discharge nozzle, 14-Variable frequency motor, 15-Long shaft, 16-Screw conveyor blade, 17-Mixing tank B, 18-Connecting pipe, 19-Mixing motor, 20-Mixing shaft, 21-Impeller, 22-Cutting plate, 23-Mudification slurry conveying pipe, 24-Support, 25-Solenoid valve A, 26-Water supply pipe, 27-Solenoid valve B. Detailed Implementation
[0018] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention. Example 1
[0019] like Figure 1-4 As shown, the dry red mud mudification device includes mudification chamber 1, mixing tank A2, and mixing tank B17; The mud-forming chamber 1 is installed on the ground via a bracket 24, with its bottom higher than the top of the mixing tank A2. A discharge platform is located next to the mud-forming chamber 1, allowing red mud transport vehicles to drive to the top of the chamber and park. The left and right side walls inside the mud-forming chamber 1 are inclined planes 3 extending downwards from the outside in, with an angle of 25° between the inclined planes 3 and the horizontal plane. The front and rear side walls inside the mud-forming chamber 1 are vertical surfaces, and the bottom surface 4 of the mud-forming chamber 1 is a horizontal plane. A front-to-back section is located in the middle of the bottom surface 4. The width of the bottom surface 4 of the rear-direction mixing tank 5 is 2-3 times the width of the mixing tank 5; a horizontal spiral mixer is installed in the mixing tank 5, and the end of the conveying direction of the horizontal spiral mixer is located at the outlet of the mixing tank 5; the top of the mixing tank A2 is covered, and a mixing mechanism is installed inside the mixing tank A2; a water inlet pipe 6 is provided on the lower part of the side wall of the mixing tank A2 along the clockwise tangential direction, and the tail of the water inlet pipe 6 extends out of the side wall of the mixing tank A2 and is connected to a water source through a pipeline; a solenoid valve A25 is installed on the water inlet pipe 6. The horizontal spiral mixer includes a variable frequency motor 14, a long shaft 15, and spiral conveying blades 16. The variable frequency motor 14 is located outside the mixing tank 5 at the end away from its outlet. The output shaft of the variable frequency motor 14 is connected to the long shaft 15. The long shaft 15 passes through the shaft hole in the side wall of the mixing tank 5 and extends to the outlet of the mixing tank 5. A sealing ring is provided in the shaft hole. The spiral conveying blades 16 are provided on the long shaft 15 in the mixing tank 5 to stir the material in the mixing tank 5 and convey it to the outlet.
[0020] The top of the four side walls of the mud-forming chamber 1 is provided with vertical protective plates 7. Each protective plate 7 is sealed and connected to form a protective chamber. The top of the left or right protective plate 7 is provided with a chamber top platform 8. A high-pressure water gun 9 is provided on the chamber top platform 8. The tail of the high-pressure water gun 9 is connected to a water source through a hose 10. A row of low-pressure water guns 11 is fixedly installed on the upper, middle and lower parts of the two inclined planes 3 respectively. Each low-pressure water gun 11 is arranged in the left and right direction and at a 15° angle to the inclined plane 3. The low-pressure water guns 11 are connected to the water supply pipe 26 through water pipes and supplied with water from the top of the mud-forming chamber 1. The low-pressure water guns 11 at the top and bottom of the two inclined planes 3 are aligned one by one along the inclined plane direction, with a spacing of 0.7m between each low-pressure water gun 11. The distance between the low-pressure water gun 11 located at the front and rear sides and the front and rear side walls is 0.7m respectively. The vertical height of the low-pressure water gun 11 at the bottom of the inclined plane 3 from the bottom surface of the mud-forming chamber 1 is 0.5m. Along the slope direction, the lateral position of the low-pressure water gun 11 in the middle of the two slopes 3 is set at the middle position between the adjacent points of the two rows of low-pressure water guns 11 in the upper and lower parts of the slope 3.
[0021] The water source for the high-pressure water gun 9 and the low-pressure water gun 11 comes from the dewatered liquid from the sludge filter press.
[0022] The outlet of the mixing tank 5 is connected to the mud discharge tank 12. The mud discharge tank 12 extends horizontally to the top of the mixing tank A2. The end of the mud discharge tank 12 is closed. The bottom end of the mud discharge tank 12 passes through the discharge nozzle 13 through the cover and enters the mixing tank A2, discharging the material in the mud discharge tank 12 into the mixing tank A2.
[0023] The mixing tank B17 is located next to the mixing tank A2. The mixing tank B17 and the mixing tank A2 are the same in position, shape and size. The bottom and waist of the mixing tank A2 are respectively provided with horizontal connecting pipes 18, which are connected to the bottom and waist of the mixing tank B17. The mixing tank B17 is equipped with a stirring mechanism. The lower part of the side wall of the mixing tank B17 is provided with a water inlet pipe 6 in a clockwise tangential direction. The end of the water inlet pipe 6 extends out of the side wall of the mixing tank B17 and is connected to a water source through a pipeline. A solenoid valve A25 is provided on the water inlet pipe 6. The side walls of the mixing tanks A2 and B17 are provided with transparent observation windows.
[0024] The stirring mechanisms installed in the stirring tanks A2 and B17 have the same structure and position, both including a stirring motor 19, a stirring shaft 20, and impellers 21. The stirring motor 19 is located in the middle of the outer wall of the top plate of the stirring tank A2 or B17, and the output shaft of the stirring motor 19 is set vertically downward, passing through the top plate of the stirring tank A2 or B17 into its tank body. The upper end of the stirring shaft 20 is connected to the lower end of the output shaft of the stirring motor 19, and the lower end of the stirring shaft 20 extends to the lower part of its tank body. The stirring shaft 20 is provided with two or more layers of impellers 21 at intervals, with one set of impellers 21 located on the lower end of the stirring shaft 20. The diameter of the impeller 21 is 1 / 3 of the inner diameter of the stirring tank A2 or B17.
[0025] Multiple sets of cutting plates 22 are evenly arranged counterclockwise on the inner walls of the mixing tanks A2 and B17. Each set of cutting plates 22 forms a 15° angle with the tangent of the inner wall of the mixing tank A2 or B17 at its location. Each set of cutting plates 22 extends from the top to the bottom of the inner wall of the mixing tank A2 or B17. The front end face of each set of cutting plates 22 is ground into a blade shape.
[0026] The bottom of the outer wall of the mixing tank B17 is provided with a mud slurry conveying pipe 23, and a solenoid valve B27 is provided on the mud slurry conveying pipe 23. The mud slurry conveying pipe 23 is connected to the sludge conveying pipe through a pipeline and a conveying pump. The mixing tank B17 is equipped with a mud level detector, which is set at the highest mud level. When mud slurry is detected, the control solenoid valve B is opened and the delivery pump is started to input the mud slurry into the ore conveying pipe, mix it with the ore slurry and send it to the next process.
[0027] The specific process of the dry red mud slurry method based on the above-mentioned dry red mud slurry device is as follows: S1. Turn on all low-pressure water guns 11 to spray water, start the horizontal spiral mixer in the mixing tank 5, and clean water enters the mixing tank A2 through the mud discharge tank 12, and then enters the mixing tank B17 through the connecting pipe 18. When the clean water level submerges the impeller 21 at the lower end of the mixing shaft 20 in the mixing tank B17, turn on the mixing motor 19 of the mixing tank A2 and the mixing tank B17 to drive the impeller 21 to rotate clockwise. S2. Open the self-unloading device of the self-unloading red mud transport vehicle that was previously parked on the unloading platform next to the top of the mud bin 1, so that its carriage is tilted and raised. When the tilt of its carriage reaches 65° to 70°, turn on the high-pressure water gun 9 and manually control it to rinse and initially wet the red mud on the carriage until the unloading is completed. Then turn off the high-pressure water gun 9 and keep spraying water from each low-pressure water gun 11. S3. Red mud is stirred in mixing tank 5 by a horizontal spiral mixer and fully mixed with water to form a preliminary mud slurry. It enters mixing tank A2 through the mud discharge trough 12 from the outlet. The solenoid valve A25 of the water inlet pipe 6 of mixing tank A2 is opened to supply water in a clockwise tangential direction. In mixing tank A2, the mixing shaft 20 and impeller 21 continuously stir and cut the mud at high speed, further mixing it with water. When it rises to the height of the connecting pipe 18, it enters mixing tank B17. The solenoid valve A25 of the water inlet pipe 6 of mixing tank B17 is opened to supply water in a clockwise tangential direction. The mixing shaft 20 and impeller 21 of mixing tank B17 continuously stir and cut the mud at high speed, further mixing it. S4, mixing tank A2 and mixing tank B17 work together through connecting pipe 18 until the mud slurry in mixing tank B17 contacts the mud level detector. The mud level detector controls the solenoid valve B to open and the conveying pump to start, inputting the mud slurry into the ore conveying pipe, mixing with the ore and sending it to the next process; the conveying speed of the conveying pump is consistent with the feeding speed of the horizontal screw mixer. S5. When the mud level in mixing tank A2 begins to gradually decrease and the mud entering from the upper layer becomes clear, close all low-pressure water guns 11 and stop the horizontal spiral mixer. When the water level in mixing tank B17 is lower than the impeller 21 at the bottom of the mixing shaft 20, close the solenoid valves A25, B, and the delivery pump of mixing tanks A2 and B17 to stop the operation of the entire system.
[0028] In the above method, multiple sets of cutting plates 22 are evenly arranged counterclockwise on the inner walls of mixing tanks A2 and B17. Each set of cutting plates 22 forms an angle of 10-20° with the tangent of the inner wall of mixing tanks A2 and B17 at its setting position. The front end face of each set of cutting plates 22 is ground into a blade shape. When the stirring mechanism is working in mixing tanks A2 and B17, the red mud slurry is more effectively cut and collided, making it more uniformly mixed.
Claims
1. A device for turning dry red mud into mud, comprising a mud-turning chamber (1) and a mixing tank A (2), characterized in that: The mud-forming chamber (1) is installed on the ground by a bracket (24), and the bottom of the mud-forming chamber (1) is higher than the top surface of the mixing tank A (2). A discharge platform is provided next to the mud-forming chamber (1), and red mud transport vehicles can drive to the top of the mud-forming chamber (1) and park there. The left and right side walls inside the mud-forming chamber (1) are inclined surfaces (3) that extend downward from the outside to the inside. The front and rear side walls inside the mud-forming chamber (1) are vertical surfaces. The bottom surface (4) of the mud-forming chamber (1) is a horizontal plane. A mixing tank (5) is provided in the middle of the bottom surface (4) along the front and rear direction. The width of the bottom surface (4) is 2-3 times the width of the mixing tank (5); a horizontal spiral mixer is provided in the mixing tank (5), and the end of the conveying direction of the horizontal spiral mixer is located at the outlet of the mixing tank (5); the top of the mixing tank A (2) is covered, the mixing tank A (2) is provided with a stirring mechanism, and the lower part of the side wall of the mixing tank A (2) is provided with a water inlet pipe (6) in a clockwise tangential direction. The tail of the water inlet pipe (6) extends out of the side wall of the mixing tank A (2) and is connected to the water source through a pipeline. A solenoid valve A (25) is provided on the water inlet pipe (6). The top of the four side walls of the mud-forming chamber (1) is provided with vertical protective plates (7), and each protective plate (7) is sealed and connected to form a protective chamber. The top of the protective plate (7) on the left or right side is provided with a chamber top platform (8), and a high-pressure water gun (9) is provided on the chamber top platform (8). The tail of the high-pressure water gun (9) is connected to the water source through a hose (10). A row of low-pressure water guns (11) is fixedly installed on the upper, middle and lower parts of the two inclined planes (3). Each low-pressure water gun (11) is set along the left and right direction and forms an angle of 10-15° with the inclined plane (3). The low-pressure water guns (11) are connected through water pipes and supplied with water from the top of the mud-forming chamber (1) to the water supply pipe (26). The outlet of the mixing tank (5) is connected to the mud discharge tank (12). The mud discharge tank (12) extends horizontally to the top of the mixing tank A (2). The end of the mud discharge tank (12) is closed. The bottom end of the mud discharge tank (12) passes through the discharge nozzle (13) and enters the mixing tank A (2) through the cover, discharging the material in the mud discharge tank (12) into the mixing tank A (2).
2. The dry red mud sludge processing device as described in claim 1, characterized in that: The angle between the inclined plane (3) and the horizontal plane is 20°-30°.
3. The dry red mud sludge processing device as described in claim 1, characterized in that: The low-pressure water guns (11) at the top and bottom of the two inclined planes (3) are aligned one by one along the inclined plane direction. The distance between each low-pressure water gun (11) is 0.6-0.8m. The distance between the low-pressure water gun (11) at the front and back sides and the front and rear side walls is 0.6-0.8m respectively. The vertical height of the low-pressure water gun (11) at the bottom of the inclined plane (3) from the bottom surface of the mud-forming chamber (1) is 0.3-0.6m. Along the slope direction, the lateral position of the low-pressure water gun (11) in the middle of the two slopes (3) is set at the middle position between the adjacent points of the two rows of low-pressure water guns (11) at the top and bottom of the slope (3); Preferably, the water source for the high-pressure water gun (9) and the low-pressure water gun (11) comes from the dewatered liquid from the sludge filter press.
4. The dry red mud sludge processing device as described in claim 1, characterized in that: The horizontal spiral mixer includes a variable frequency motor (14), a long shaft (15), and spiral conveying blades (16). The variable frequency motor (14) is located outside the mixing tank (5) at the end away from its outlet. The output shaft of the variable frequency motor (14) is connected to the long shaft (15). The long shaft (15) passes through the shaft hole in the side wall of the mixing tank (5) and extends all the way to the outlet of the mixing tank (5). A sealing ring is provided in the shaft hole. Spiral conveying blades (16) are provided on the long shaft (15) in the mixing tank (5) to stir the material in the mixing tank (5) and convey it to the outlet.
5. The dry red mud sludge processing device as described in claim 1, characterized in that: It also includes a mixing tank B (17), which is located next to the mixing tank A (2). The mixing tank B (17) and the mixing tank A (2) are in the same position, shape and size. The bottom and waist of the mixing tank A (2) are respectively provided with horizontal connecting pipes (18), which are connected to the bottom and waist of the mixing tank B (17). The mixing tank B (17) is provided with a stirring mechanism. The lower part of the side wall of the mixing tank B (17) is provided with a water inlet pipe (6) in a clockwise tangential direction. The tail of the water inlet pipe (6) extends out of the side wall of the mixing tank B (17) and is connected to the water source through a pipeline. The water inlet pipe (6) is provided with a solenoid valve A (25). The side walls of the mixing tanks A (2) and B (17) are provided with transparent observation windows.
6. The dry red mud sludge processing device as described in claim 5, characterized in that: The mixing mechanism in the mixing tank A (2) and mixing tank B (17) has the same structure and position. It includes a mixing motor (19), a mixing shaft (20), and an impeller (21). The mixing motor (19) is located in the middle of the outer wall of the top plate of the mixing tank A (2) or the mixing tank B (17). The output shaft of the mixing motor (19) is set vertically downward and passes through the top plate of the mixing tank A (2) or the mixing tank B (17) into its tank body. The upper end of the mixing shaft (20) is connected to the lower end of the output shaft of the mixing motor (19). The lower end of the mixing shaft (20) extends to the lower part of its tank body. The mixing shaft (20) is provided with more than two layers of impellers (21) at intervals. One set of impellers (21) is located on the lower end of the mixing shaft (20). The diameter of the impeller (21) is 1 / 4 to 1 / 3 of the inner diameter of the mixing tank A (2) or the mixing tank B (17).
7. The dry red mud sludge processing device as described in claim 5, characterized in that: Multiple sets of cutting plates (22) are evenly arranged on the inner walls of the mixing tank A (2) and the mixing tank B (17) in a counterclockwise direction. Each set of cutting plates (22) forms an angle of 10-20° with the tangent of the inner wall of the mixing tank A (2) and the mixing tank B (17) at which it is set. Each set of cutting plates (22) extends from the top of the inner wall of the mixing tank A (2) or the mixing tank B (17) to the bottom. The front end face of each set of cutting plates (22) is ground into a blade shape.
8. The dry red mud sludge processing device as described in claim 6, characterized in that: The bottom of the outer wall of the mixing tank B (17) is provided with a mud slurry conveying pipe (23), and a solenoid valve B (27) is provided on the mud slurry conveying pipe (23). The mud slurry conveying pipe (23) is connected to the sludge conveying pipe through a pipeline and a conveying pump. The mixing tank B (17) is equipped with a mud level detector. The mud level detector is set at the highest mud level. When mud slurry is detected, the control solenoid valve B is opened and the delivery pump is started to input the mud slurry into the ore conveying pipe, mix it with the ore slurry and send it to the next process.
9. A method for drying red mud, utilizing the drying red mud apparatus as described in any one of claims 5-8, characterized in that, Includes the following steps: S1. Turn on all low-pressure water guns (11) to spray water, start the horizontal spiral mixer in the mixing tank (5), and the clean water enters the mixing tank A (2) through the mud discharge tank (12), and then enters the mixing tank B (17) through the connecting pipe (18). When the clean water level submerges the impeller (21) at the lower end of the mixing shaft (20) in the mixing tank B (17), turn on the mixing motor (19) of the mixing tank A (2) and the mixing tank B (17) to drive the impeller (21) to rotate clockwise. S2. Open the self-unloading device of the self-unloading red mud transport vehicle that was previously parked on the unloading platform next to the top of the mud bin (1) to tilt and lift its cargo box. When the tilt of its cargo box reaches 65°~70°, turn on the high-pressure water gun (9) and manually control it to flush and initially wet the red mud on the cargo box until the unloading is completed. Then turn off the high-pressure water gun (9) and keep spraying water from each low-pressure water gun (11). S3. Red mud is stirred in the mixing tank (5) by a horizontal spiral mixer and fully mixed with water to form a preliminary mud slurry. It enters the mixing tank A (2) through the mud discharge tank (12) from the outlet. The solenoid valve A (25) of the water inlet pipe (6) of the mixing tank A (2) is opened to supply water in a clockwise tangential direction. The mixing tank A (2) is continuously and rapidly stirred and cut by its stirring shaft (20) and impeller (21). The preliminary mud slurry is further mixed with water. When it rises to the height of the connecting pipe (18), it enters the mixing tank B (17). The solenoid valve A (25) of the water inlet pipe (6) of the mixing tank B (17) is opened to supply water in a clockwise tangential direction. The stirring shaft (20) and impeller (21) of the mixing tank B (17) are continuously and rapidly stirred and cut to further mix the mud. S4. Mixing tank A (2) and mixing tank B (17) work together through connecting pipe (18) until the mud slurry in mixing tank B (17) comes into contact with the mud level detector. The mud level detector controls the solenoid valve B to open and the conveying pump to start, inputting the mud slurry into the sludge conveying pipe, mixing with the sludge and sending it to the next process. The conveying speed of the conveying pump is consistent with the feeding speed of the horizontal spiral mixer. S5. When the mud level in mixing tank A (2) begins to gradually decrease and the mud entering from the upper layer becomes clear, close all low-pressure water guns (11) and stop the horizontal spiral mixer at the same time; when the water level in mixing tank B (17) is lower than the impeller (21) at the bottom of the mixing shaft (20), close the solenoid valve A (25) of mixing tank A (2) and mixing tank B (17), as well as the solenoid valve B and the delivery pump, and stop the operation of the entire system.
10. The method for turning dry red mud into mud as described in claim 9, characterized in that: Multiple sets of cutting plates (22) are evenly arranged counterclockwise on the inner walls of the mixing tanks A (2) and B (17). Each set of cutting plates (22) forms an angle of 10-20° with the tangent of the inner wall of the mixing tanks A (2) and B (17) where it is set. The front end face of each set of cutting plates (22) is ground into a blade shape. When the mixing mechanism is working in the mixing tanks A (2) and B (17), the red mud slurry is more effectively cut and collided, making it more uniformly mixed.
Citation Information
Cited By
A device for accurately controlling the moisture content of a red mud roadbed material
CN122209791A