Tailing pulp filter-pressing dehydration device

Abstract

The invention relates to the technical field of tailing dehydration, in particular to a tailing slurry filter-press dehydration device which comprises a filter-press dehydration system, the filter-press dehydration system and a slurry stirring and caching system are both mounted on an operation table, the filter-press dehydration system comprises a water filtering plate, a fixing frame, a lifting type end cover and a slurry barrel, the lifting type end cover is mounted at the top of the fixing frame, and the slurry barrel is mounted on the fixing frame. The slurry barrel is detachably installed between the lifting type end cover and the water filtering plate, a high-pressure air inlet pipe and a pressure relief assembly are installed on the lifting type end cover, the high-pressure air inlet pipe is connected to the compressed air supply system, the material uniformizing system comprises a material uniformizing disc, the material uniformizing disc is arranged in the slurry barrel in a sliding mode, and a filtering assembly is further installed at the inner bottom of the slurry barrel. The slurry stirring temporary storage system is used for supplying materials to the slurry barrel, a water collecting assembly used for collecting filtrate is further fixed to the bottom of the operation table, different pressures are achieved by externally connecting high-pressure air, filter pressing dehydration of tailing slurry is achieved, the dehydration time is shortened, and the water content of a filter cake is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of tailings dehydration, in particular to a tailings slurry filter press dehydration device. Background Art

[0002] The full tailings paste filling mining method, with its unique advantages in ensuring mine safety, improving resource recovery rates, minimizing tailings solid waste, and achieving resource utilization, has become the preferred method for alleviating a range of issues associated with deep mining and is being adopted by an increasing number of mines. Based on the characteristics of full tailings, understanding the performance and mechanical properties of the filler material through tests such as full tailings flocculation and settling, filler slurry ratios, and pipeline transport characteristics is essential for selecting a full tailings paste filling process. Full tailings filling tests are typically conducted in an indoor laboratory, requiring the transportation of full tailings samples to the laboratory. Since the full tailings slurry discharged from the concentrator has a low concentration, two methods are commonly used to transport the full tailings sample to the laboratory. One method involves transporting the full tailings slurry to the laboratory in plastic barrels and then performing filter pressing to dewater it. This not only increases transportation costs and wastes manpower, material, and other resources, but also reduces the efficiency of full tailings sampling. The other method involves laying plastic sheeting on-site to allow the slurry to air dry before transporting it to the laboratory.

[0003] Chinese patent application publication number CN101288814A discloses a process for dewatering and dry-discharging phosphate rock scrubbing tailings slurry. The process involves pumping the scrubbed tailings slurry through a filter unit for pressure filtration. The filtered water is then circulated back to the scrubbing unit for scrubbing and beneficiation. The filtered low-grade phosphorus-containing slurry is then stored for future use. However, this patent still has some drawbacks: the full tailings sampling cycle is long and susceptible to site limitations. Summary of the Invention

[0004] In order to solve the problem that the whole tailings sampling cycle is long and susceptible to on-site site restrictions, the present invention provides a tailings slurry filter press dewatering device.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a tailings slurry filter press dewatering device, including an operating table, a filter press dewatering system, a slurry stirring and caching system, a material equalizing system and a compressed air supply system, the filter press dewatering system and the slurry stirring and caching system are both installed on the operating table, the filter press dewatering system includes a water filter plate fixed on the operating table, a fixing frame, a lifting end cover and a slurry barrel, the lifting end cover is installed on the top of the fixing frame, the slurry barrel is detachably installed between the lifting end cover and the filter plate, the lifting end cover is used to seal the top opening of the slurry barrel, a high-pressure air intake pipe and a pressure relief assembly are installed on the lifting end cover, the high-pressure air intake pipe is connected to the compressed air supply system, the material equalizing system includes a material equalizing plate, the material equalizing plate is slidably arranged in the slurry barrel, the inner bottom of the slurry barrel is also equipped with a filter assembly, the slurry stirring and caching system is used to supply material to the slurry barrel, and the bottom of the operating table is also fixed with a water collecting assembly for collecting filtrate.

[0006] Preferably, the slurry stirring cache system includes a slurry cache tank, a feed pipe and a plurality of air inlet nozzles. The slurry cache tank is mounted on the operating table and its bottom is higher than the top of the slurry barrel. The feed pipe is installed at the bottom of the slurry cache tank. The plurality of air inlet nozzles are arranged in a plum blossom pile shape along the circumferential direction of the slurry cache tank and are connected to the slurry cache tank. A feed valve is installed near the bottom of the slurry barrel, and the feed pipe is connected to the feed valve. A discharge valve is installed near the top of the slurry barrel, and the slurry can be discharged from the discharge valve when the slurry barrel is full.

[0007] Preferably, the compressed air supply system includes an air compressor, an air flow control valve and two air supply pipes, the two air supply pipes are respectively connected to the output end of the air compressor, the air flow control valve is connected to one of the air supply pipes, the air flow control valve adopts pressure graded control, and the pressure graded control includes an initial low-pressure stage of 0~0.8MPa and a later high-pressure stage of 0.8~1.5MPa. A pressure detection module is also installed on the lifting end cover, and the sensing end of the pressure detection module extends to the internal cavity of the slurry barrel. The high-pressure air intake pipe is connected to the air flow control valve, and multiple air inlet nozzles are connected in series with each other and connected to another air supply pipe, and a valve is installed on the pipeline.

[0008] Preferably, the fixing frame includes a horizontal cross bar and a symmetrical vertical bar, the symmetrical vertical bar is fixed at both ends of the horizontal cross bar to form an inverted U-shaped frame, a support plate is fixed at the bottom of the symmetrical vertical bar, a rotating seat is fixed on the operating table, the lower end of the support plate is rotatably mounted on the rotating seat, and a locking knob is also threadedly connected to the support plate, and the bottom of the locking knob passes through the support plate and abuts against the rotating seat.

[0009] Preferably, a threaded barrel is fixed in the middle of the horizontal crossbar, a screw is installed in the threaded barrel, a handwheel is fixed to the upper end of the screw, and the lower end of the screw is rotatably connected to the center of the lifting end cover through a bearing.

[0010] Preferably, the filter assembly includes a surface filter paper, a middle filter paper and a bottom filter paper, and the surface filter paper, the middle filter paper and the bottom filter paper are stacked from top to bottom to form a three-layer filter paper structure, wherein the filtration pore size of the surface filter paper is 100 μm, the filtration pore size of the middle filter paper is 50 μm, and the filtration pore size of the bottom filter paper is 20 μm.

[0011] Preferably, the material balancing system also includes an electric lifting rod, a center threaded rod, a connecting rod, a lifting ring, a compression spring, a pressure seat, a rotating ring and a plurality of steel needles. The electric lifting rod is fixed on the lifting end cover, and the output end of the electric lifting rod is fixedly connected to the lifting ring through a connecting rod. The lifting ring and the pressure seat are slidingly sleeved on the center threaded rod, and the two ends of the compression spring are fixedly connected to the lifting ring and the pressure seat respectively. The rotating ring is rotatably connected to the bottom of the pressure seat, and the center of the rotating ring is sleeved on the center threaded rod and threadedly connected to the center threaded rod. The center of the material balancing plate is fixedly connected to the pressure seat, and a plurality of steel needles are fixed on the bottom of the material balancing plate. The center threaded rod is vertically fixed to the bottom center of the lifting end cover. When the material balancing plate moves to the bottom, the total length of the center threaded rod and the steel needles is equal to the distance from the top of the slurry barrel to the top of the filter assembly.

[0012] Preferably, the water filter plate is a cylindrical structure, a circular steel plate with several small holes is fixed on the top of the cylindrical structure, an external thread is provided on the water filter plate, an internal thread is provided on the bottom of the slurry barrel, and the slurry barrel is threadedly connected to the water filter plate.

[0013] Preferably, the pressure relief assembly includes a vent hole installed on the lifting end cover and a matching knob-type vent valve, and the knob-type vent valve is used to adjust the internal air pressure of the slurry barrel.

[0014] Preferably, the water collection assembly includes a water collection trough and a cone, the surface of the operating table is recessed downward to form a water collection trough, a water collection port is provided at the bottom of the water collection trough, the water filter plate is fixed at the top of the water collection port, the cone is fixedly connected to the bottom of the water collection port, and a drain valve and a drain pipe are also installed at the bottom of the cone.

[0015] The beneficial effects of the present invention are as follows: first, the tailings slurry filter press dehydration device adopts external high-pressure air to perform tailings slurry filter press dehydration, which shortens the dehydration time, improves the tailings slurry dehydration efficiency, and reduces the moisture content of the filter cake.

[0016] Secondly, the tailings slurry filter press dewatering device achieves directional diversion of the slurry through the slurry cylinder, filter assembly, water filter plate and water collection assembly, avoiding secondary pollution during the filter press process; the fixed frame provides structural rigidity to ensure the overall stability of the device during pressurized operation; the filter assembly composed of multiple layers of filter paper ensures the clarity of the filtrate; the configuration of the pressure relief assembly prevents the risk of system overpressure and improves the safety of operation.

[0017] Thirdly, the tailings slurry filter pressing and dehydration device uses high-pressure air to stir the tailings slurry in the slurry buffer tank and the tailings slurry flows into the slurry barrel by its own weight for filter pressing and dehydration, which reduces energy consumption.

[0018] Fourthly, the tailings slurry filter press dewatering device is equipped with a material equalization system, which avoids the slurry sedimentation and clogging of the filter components during the filter press process, and effectively improves the efficiency of the filter press dewatering. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the slurry buffer tank of the present invention; Figure 3 It is a schematic diagram of the lifting end cover structure of the present invention; Figure 4 It is a schematic structural diagram of the filter assembly of the present invention; Figure 5 It is a structural schematic diagram of the material distribution tray of the present invention; Figure 6 It is a schematic diagram of the lifting ring structure of the present invention.

[0021] Figure numerals: 1. operating table; 2. filter press dewatering system; 3. slurry stirring and caching system; 4. water filter plate; 5. fixing frame; 6. lifting end cover; 7. slurry barrel; 8. high-pressure air inlet pipe; 9. material distribution plate; 10. filter assembly; 11. slurry cache tank; 12. feeding pipe; 13. air inlet nozzle; 14. feed valve; 15. discharge valve; 16. pressure detection module; 17. horizontal cross bar; 18. symmetrical vertical bar; 19. support plate; 20. rotating seat; 21. locking knob; 22. threaded barrel; 23. screw; 24. electric lifting rod; 25. center threaded rod; 26. connecting rod; 27. lifting ring; 28. compression spring; 29. ​​pressure seat; 30. rotating ring; 31. steel needle; 32. knob-type air release valve; 33. cone barrel; 34. drain valve. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] like Figures 1 to 6 As shown, the present invention provides a tailings slurry filter press dewatering device, including an operating table 1, a filter press dewatering system 2, a slurry stirring and caching system 3, a material distribution system and a compressed air supply system. The filter press dewatering system 2 and the slurry stirring and caching system 3 are both installed on the operating table 1. A universal wheel set with a braking function is installed at the bottom of the operating table 1 to facilitate moving the operating table 1 to different sites. The filter press dewatering system 2 includes a water filter plate 4 fixed on the operating table 1, a fixing frame 5, a lifting end cover 6 and a slurry barrel 7.

[0024] The lifting end cover 6 is installed on the top of the fixing frame 5, and the slurry barrel 7 is detachably installed between the lifting end cover 6 and the water filter plate 4. The lifting end cover 6 is used to seal the top opening of the slurry barrel 7. The lifting end cover 6 is a double-layer structure, the upper layer is a circular steel plate, and the lower layer is a rubber layer, which can realize the sealing of the upper port of the slurry barrel 7 to prevent air leakage and pressure relief.

[0025] The fixing frame 5 includes a horizontal cross bar 17 and a symmetrical vertical bar 18. The symmetrical vertical bar 18 is fixed at both ends of the horizontal cross bar 17 to form an inverted U-shaped frame. A support plate 19 is fixed to the bottom of the symmetrical vertical bar 18. A rotating seat 20 is fixed on the operating table 1. The lower end of the support plate 19 is rotatably mounted on the rotating seat 20. A locking knob 21 is also threadedly connected to the support plate 19. The bottom of the locking knob 21 passes through the support plate 19 and abuts against the rotating seat 20. When installing the slurry cylinder 7, the locking knob 21 is loosened. At this time, the symmetrical vertical bar 18 can be laid down, so that the fixing frame 5 as a whole can be placed flat on the operating table. On the platform 1, the lifting end cover 6 is placed on one side of the water filter plate 4 together with the fixing frame 5, and then the slurry barrel 7 can be installed on the water filter plate 4, which effectively avoids the fixing frame 5 from blocking the installation of the slurry barrel 7. After the slurry barrel 7 is installed, the fixing frame 5 is erected as a whole and the locking knob 21 is tightened to make the fixing frame 5 in a vertical state. The vertical fixation of the fixing frame 5 provides structural rigidity to ensure the overall stability of the device during pressurization operation. The lifting end cover 6 is located directly above the slurry barrel 7. At this time, the lifting end cover 6 can be moved downward to close the upper end opening of the slurry barrel 7.

[0026] A threaded barrel 22 is fixed in the middle of the horizontal cross bar 17, and a screw 23 is installed in the threaded barrel 22. A handwheel is fixed to the upper end of the screw 23, and the lower end of the screw 23 is rotatably connected to the center of the lifting end cover 6 through a bearing. Turning the handwheel drives the screw 23 to move up and down, and then moves the lifting end cover 6 up and down to open or close the slurry barrel 7.

[0027] The water filter plate 4 is a cylindrical structure, and a circular steel plate with several small holes is fixed on the top of the cylindrical structure. The water filter plate 4 is provided with an external thread, and the bottom of the slurry barrel 7 is provided with an internal thread. The slurry barrel 7 is threadedly connected to the water filter plate 4, and cooperates with the lifting end cover 6 to form a closed structure inside the slurry barrel 7.

[0028] A high-pressure air intake pipe 8 and a pressure relief assembly are installed on the lifting end cover 6. The high-pressure air intake pipe 8 is connected to the compressed air supply system. The compressed air supply system includes an air compressor, an air flow control valve and two air supply pipes. The air compressor and the air flow control valve are both existing technologies and are therefore not shown in the accompanying drawings. The two air supply pipes are respectively connected to the output ends of the air compressor, and the air flow control valve is connected to one of the air supply pipes. The air flow control valve adopts pressure-grading control. The pressure-grading control includes an initial low-pressure stage of 0~0.8MPa and a later high-pressure stage of 0.8~1.5MPa. External high-pressure air is used for filter press dehydration of tailings slurry, which shortens the dehydration time, improves the dehydration efficiency of the tailings slurry, and reduces the moisture content of the filter cake.

[0029] A pressure detection module 16 is also installed on the lifting end cover 6. The sensing end of the pressure detection module 16 extends to the internal cavity of the slurry barrel 7 to monitor the pressure inside the slurry barrel 7. The high-pressure air intake pipe 8 is connected to the airflow control valve. Multiple air intake nozzles 13 are connected in series with each other and connected to another air supply pipe, and a valve is installed on the pipeline.

[0030] The pressure relief assembly includes a vent hole installed on the lifting end cover 6 and a matching knob-type vent valve 32. The knob-type vent valve 32 is used to adjust the internal air pressure of the slurry barrel 7 to prevent the risk of system overpressure and improve the safety of operation.

[0031] The slurry mixing and buffering system 3 is used to feed the slurry barrel 7. The slurry mixing and buffering system 3 includes a slurry buffer tank 11, a feeding pipe 12 and a plurality of air inlet nozzles 13. The slurry buffer tank 11 is mounted on the operating table 1 and the bottom is higher than the top of the slurry barrel 7 to ensure that the slurry in the slurry buffer tank 11 flows into the slurry barrel 7 by its own weight. The feeding pipe 12 is installed at the bottom of the slurry buffer tank 11. The plurality of air inlet nozzles 13 are arranged in a plum blossom pile shape along the circumferential direction of the slurry buffer tank 11 and are connected to the slurry buffer tank 11. High-pressure air is introduced into the slurry buffer tank 11 through the plurality of air inlet nozzles 13 to stir the slurry to prevent the slurry from settling and clogging the feeding pipe 12.

[0032] A feed valve 14 is installed near the bottom of the slurry barrel 7, and the feed pipe 12 is connected to the feed valve 14. A discharge valve 15 is installed near the top of the slurry barrel 7. When the slurry barrel 7 is full, the slurry can be discharged from the discharge valve 15 to observe whether the slurry barrel 7 is full of slurry.

[0033] A filter assembly 10 is also installed at the inner bottom of the slurry barrel 7. The filter assembly 10 includes a surface filter paper, a middle filter paper and a bottom filter paper. The surface filter paper, the middle filter paper and the bottom filter paper are stacked from top to bottom to form a three-layer filter paper structure, wherein the filter pore size of the surface filter paper is 100 μm, the filter pore size of the middle filter paper is 50 μm, and the filter pore size of the bottom filter paper is 20 μm, which ensures the clarity of the filtrate.

[0034] When filtering the tailings slurry, first place the tailings slurry into the slurry buffer tank 11, start the air compressor, open the valve to introduce high-pressure air into the slurry buffer tank 11 to stir the tailings slurry, vertically install the detachable slurry barrel 7 on the water filter plate 4, ensure that its bottom is installed in place with the water filter plate 4 of the operating table 1, then rotate the handwheel to drive the lifting end cover 6 to press vertically downward through the screw 23 until it fits tightly with the top of the slurry barrel 7, and the rubber layer is compressed to form an airtight closed space with the slurry barrel 7, and check whether the initial reading of the pressure detection module 16 is normal pressure. Then open the feed valve 14 to allow the tailings slurry to flow into the slurry barrel 7 through the feed pipe 12 until the discharge valve 15 on the upper part of the slurry barrel 7 discharges the material, and close the feed valve 14, discharge valve 15 and the valve at the bottom of the slurry buffer tank 11.

[0035] Next, the airflow control valve is opened, and high-pressure gas is injected according to a preset pressure-grading strategy. Initially, low-pressure gas is slowly introduced to prevent fine particles from clogging the filter media. Later, high-pressure gas forces the liquid through filter assembly 10, which performs graded filtration: the surface layer intercepts coarse particles, the middle layer retains medium particles, buffering the bottom layer, and the bottom layer filters ultrafine particles, ensuring that the effluent turbidity meets the standard. The filtrate is collected by the water collection assembly and ultimately flows into a water collection container.

[0036] After filtration is complete, close the air flow control valve to stop the air supply. Gradually release the pressure through the knob-type air release valve 32. After observing that the pressure gauge returns to zero, rotate the handwheel and screw 23 to raise the lifting end cover 6, remove the slurry cylinder 7, and invert the cylinder to unload the dehydrated tailings filter cake.

[0037] The material distribution system includes a material distribution plate 9, which is slidably arranged in the slurry barrel 7. The material distribution system also includes an electric lifting rod 24, a central threaded rod 25, a connecting rod 26, a lifting ring 27, a compression spring 28, a pressure seat 29, a rotating ring 30 and a plurality of steel needles 31. The electric lifting rod 24 is fixed on the lifting end cover 6. The output end of the electric lifting rod 24 is fixedly connected to the lifting ring 27 through the connecting rod 26. The lifting ring 27 and the pressure seat 29 are slidingly sleeved on the central threaded rod 25. The two ends of the compression spring 28 are fixedly connected to the lifting ring 27 and the pressure seat 29 respectively. The rotating ring 30 and the pressure seat 29 are fixedly connected. The bottom is rotatably connected, and the center of the rotating ring 30 is sleeved on the center threaded rod 25 and is threadedly connected to the center threaded rod 25. The center of the material balancing plate 9 is fixedly connected to the pressure seat 29, and multiple steel needles 31 are fixed to the bottom of the material balancing plate 9. The center threaded rod 25 is vertically fixed to the bottom center of the lifting end cover 6. When the material balancing plate 9 moves to the bottom, the total length of the center threaded rod 25 and the steel needle 31 is equal to the distance from the top of the slurry barrel 7 to the top of the filter assembly 10, ensuring that the steel needle 31 can stir the slurry near the bottom of the slurry barrel 7 while preventing the steel needle 31 from puncturing the filter assembly 10.

[0038] A water collection component for collecting filtrate is also fixed to the bottom of the operating table 1. The water collection component includes a water collection trough and a cone 33. The surface of the operating table 1 is recessed downward to form a water collection trough. A water collection port is provided at the bottom of the water collection trough. The filter plate 4 is fixed to the top of the water collection port. The cone 33 is fixedly connected to the bottom of the water collection port. A drain valve 34 and a drain pipe are also installed at the bottom of the cone 33.

[0039] The working principle of the material balancing system is: after a part of the water in the slurry is filtered out, the water moves downward all the time, so the slurry at the bottom will settle, affecting the permeability of the filter component 10, making it more difficult to filter out the water in the upper layer. In the present invention, the electric lifting rod 24 drives the lifting ring 27 to move up and down, and the lifting ring 27 drives the rotating ring 30 to move up and down along the central threaded rod 25 through the compression spring 28 and the pressure seat 29. Therefore, the rotating ring 30 will also rotate during the up and down movement, thereby driving the material balancing plate 9 to rotate, so that the material balancing plate 9 can also rotate a certain angle while moving up and down, so that the steel needle 31 at the bottom of the material balancing plate 9 can be inserted into the material precipitated at the bottom. In the slurry, the steel needle 31 can stir the slurry precipitated at the bottom as the material distribution plate 9 rotates, so that the solid matter and liquid in the slurry are evenly mixed, avoiding the slurry precipitation affecting the dehydration efficiency, and improving the efficiency of filter pressing and dehydration of the remaining slurry. When the water content in the slurry is further reduced, the remaining slurry will form a tailings filter cake. At this time, the tailings filter cake is already in a compacted state. When the steel needle 31 is pressed down, it is difficult to continue to insert it into the tailings filter cake. At this time, the lifting ring 27 moves downward and the steel needle 31 is blocked by the tailings filter cake and cannot move downward, so that the compression spring 28 is compressed, preventing the steel needle 31 from forcibly breaking the tailings filter cake, making it convenient to take out and store the tailings filter cake, and also avoiding deformation of the material distribution plate 9 and the steel needle 31.

[0040] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of this application, they can also make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A tailings slurry filter press dewatering device, comprising an operating table (1), a filter press dewatering system (2), a slurry stirring and buffering system (3), a material equalization system and a compressed air supply system, characterized in that: The filter press dewatering system (2) and the slurry stirring and buffering system (3) are both installed on the operating table (1). The filter press dewatering system (2) includes a water filter plate (4), a fixing frame (5), a lifting end cover (6) and a slurry barrel (7) fixed on the operating table (1). The lifting end cover (6) is installed on the top of the fixing frame (5). The slurry barrel (7) is detachably installed between the lifting end cover (6) and the filter plate (4). The lifting end cover (6) is used to seal the slurry barrel (7). The top end opening is provided, and a high-pressure air inlet pipe (8) and a pressure relief assembly are installed on the lifting end cover (6). The high-pressure air inlet pipe (8) is connected to the compressed air supply system. The material distribution system includes a material distribution plate (9), and the material distribution plate (9) is slidably arranged in the slurry barrel (7). A filter assembly (10) is also installed on the inner bottom of the slurry barrel (7). The slurry stirring and buffering system (3) is used to supply material to the slurry barrel (7). A water collecting assembly for collecting filtrate is also fixed to the bottom of the operating table (1).

2. The tailings slurry filter press dewatering device according to claim 1, characterized in that: The slurry mixing and caching system (3) includes a slurry caching tank (11), a feeding pipe (12) and a plurality of air inlet nozzles (13). The slurry caching tank (11) is mounted on the operating table (1) and its bottom is higher than the top of the slurry barrel (7). The feeding pipe (12) is installed at the bottom of the slurry caching tank (11). The plurality of air inlet nozzles (13) are arranged in a plum blossom pattern along the circumferential direction of the slurry caching tank (11) and are connected to the slurry caching tank (11). A feeding valve (14) is installed near the bottom of the slurry barrel (7). The feeding pipe (12) is connected to the feeding valve (14). A discharge valve (15) is installed near the top of the slurry barrel (7). When the slurry barrel (7) is full, slurry can be discharged from the discharge valve (15).

3. The tailings slurry filter press dewatering device according to claim 2, characterized in that: The compressed air supply system includes an air compressor, an air flow control valve and two air supply pipes, the two air supply pipes are respectively connected to the output end of the air compressor, the air flow control valve is connected to one of the air supply pipes, the air flow control valve adopts pressure grading control, and the pressure grading control includes an initial low-pressure stage of 0~0.8MPa and a later high-pressure stage of 0.8~1.5MPa. A pressure detection module (16) is also installed on the lifting end cover (6), and the sensing end of the pressure detection module (16) extends to the internal cavity of the slurry barrel (7). The high-pressure air intake pipe (8) is connected to the air flow control valve, and multiple air inlet nozzles (13) are connected in series with each other and connected to another air supply pipe, and a valve is installed on the pipeline.

4. The tailings slurry filter press dewatering device according to claim 1, characterized in that: The fixing frame (5) includes a horizontal crossbar (17) and a symmetrical vertical bar (18), wherein the symmetrical vertical bar (18) is fixed to both ends of the horizontal crossbar (17) to form an inverted U-shaped frame, and a support plate (19) is fixed to the bottom of the symmetrical vertical bar (18). A rotating seat (20) is fixed on the operating table (1), and the lower end of the support plate (19) is rotatably mounted on the rotating seat (20). A locking knob (21) is also threadedly connected to the support plate (19), and the bottom of the locking knob (21) passes through the support plate (19) and abuts against the rotating seat (20).

5. The tailings slurry filter press dewatering device according to claim 4, characterized in that: A threaded barrel (22) is fixed in the middle of the horizontal crossbar (17), a screw rod (23) is installed in the threaded barrel (22), a hand wheel is fixed to the upper end of the screw rod (23), and the lower end of the screw rod (23) is rotatably connected to the center of the lifting end cover (6) through a bearing.

6. The tailings slurry filter press dewatering device according to claim 1, characterized in that: The filter assembly (10) comprises a surface filter paper, a middle filter paper and a bottom filter paper, wherein the surface filter paper, the middle filter paper and the bottom filter paper are stacked from top to bottom to form a three-layer filter paper structure, wherein the filtration pore size of the surface filter paper is 100 μm, the filtration pore size of the middle filter paper is 50 μm, and the filtration pore size of the bottom filter paper is 20 μm.

7. The tailings slurry filter press dewatering device according to claim 1, characterized in that: The material distribution system further comprises an electric lifting rod (24), a central threaded rod (25), a connecting rod (26), a lifting ring (27), a compression spring (28), a pressure seat (29), a rotating ring (30) and a plurality of steel needles (31), wherein the electric lifting rod (24) is fixed on the lifting end cover (6), the output end of the electric lifting rod (24) is fixedly connected to the lifting ring (27) via the connecting rod (26), the lifting ring (27) and the pressure seat (29) are slidably sleeved on the central threaded rod (25), the two ends of the compression spring (28) are fixedly connected to the lifting ring (27) and the pressure seat (29), the rotating ring ( 30) is rotatably connected to the bottom of the pressure seat (29), the center of the rotating ring (30) is sleeved on the center threaded rod (25) and is threadedly connected to the center threaded rod (25), the center of the material balancing plate (9) is fixedly connected to the pressure seat (29), a plurality of steel needles (31) are fixed to the bottom of the material balancing plate (9), the center threaded rod (25) is vertically fixed to the bottom center of the lifting end cover (6), and when the material balancing plate (9) moves to the bottom, the total length of the center threaded rod (25) and the steel needles (31) is equal to the distance from the top of the slurry barrel (7) to the top of the filter assembly (10).

8. The tailings slurry filter press dewatering device according to claim 1, characterized in that: The water filter plate (4) is a cylindrical structure, a circular steel plate with a plurality of small holes is fixed on the top of the cylindrical structure, an external thread is provided on the water filter plate (4), and an internal thread is provided on the bottom of the slurry barrel (7), and the slurry barrel (7) is threadedly connected to the water filter plate (4).

9. The tailings slurry filter press dewatering device according to claim 1, characterized in that: The pressure relief assembly comprises a vent hole installed on the lifting end cover (6) and a matching knob-type vent valve (32), wherein the knob-type vent valve (32) is used to adjust the internal air pressure of the slurry barrel (7).

10. The tailings slurry filter press dewatering device according to claim 1, characterized in that: The water collection assembly comprises a water collection trough and a cone (33); the surface of the operating table (1) is recessed downward to form a water collection trough; a water collection port is provided at the bottom of the water collection trough; the water filter plate (4) is fixed to the top of the water collection port; the cone (33) is fixedly connected to the bottom of the water collection port; and a drain valve (34) and a drain pipe are also installed at the bottom of the cone (33).

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