Tantalum-niobium ore acid decomposition slurry filter press and filter pressing method thereof

Abstract

The present application relates to tantalum niobium ore acid decomposition slurry processing technical field, specifically a kind of tantalum niobium ore acid decomposition slurry filter press and its filter pressing method, comprising: filter press box, filter press box is equidistant and alternatively arranged with one filter plate and two filter plates;Pulling assembly, setting in filter press box, pulling assembly can drive one filter plate reciprocating motion in filter press box;Jacking assembly, connect one filter plate and two filter plates, when jacking assembly drives one filter plate to move away from two filter plates, one filter plate and two filter plates are made to move upward and form gap with the bottom of filter press box;Scraping assembly, setting in filter press box and with one filter plate and two filter plates sliding fit, when one filter plate and two filter plates act, filter residue on one filter plate and two filter plates is scraped, to scrape filter residue, improve filter effect.

Description

Technical Field

[0001] This invention relates to the technology for treating acid decomposition slurry of tantalum and niobium ore, specifically a filter press for acid decomposition slurry of tantalum and niobium ore and its filtration method. Background Technology

[0002] Tantalum-niobium ore is a valuable rare metal mineral, a general term for all geological minerals containing tantalum and niobium. The main types mined are tantalite, columbite ore, and pyrochlore. Tantalum and niobium are both rare metals, possessing extremely high strength at high temperatures. They have wide applications in electronics, biomedical engineering, special alloys, cemented carbide industry, chemical industry, superconducting industry, and precision ceramics and glass manufacturing.

[0003] In the processing of tantalum-niobium ore, the tantalum-niobium ore can form a slurry after adding water. Then, sulfuric acid and hydrofluoric acid are added to react and the slurry becomes a decomposed slurry. The decomposed slurry needs to be washed and then filtered by pressure.

[0004] During filtration, the most widely used material in the industry is the plate filter press. Solid particles are retained on the filter plate to form a filter cake, while the filtrate is discharged. However, during the filtration process, it is inevitable that a small amount of filter residue will remain on the filter plate, which will inevitably affect normal filtration in the long run. Summary of the Invention

[0005] The purpose of this invention is to provide a tantalum-niobium ore acid decomposition slurry filter press and its filtration method to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A tantalum-niobium ore acid decomposition slurry filter press, comprising:

[0008] A filter press box, wherein a No. 1 filter press plate and a No. 2 filter press plate are arranged equidistantly and alternately inside the filter press box. Both the No. 1 filter press plate and the No. 2 filter press plate are provided with filter holes, and the filter holes provided on the No. 1 filter press plate and the No. 2 filter press plate are staggered.

[0009] A pull-out assembly is provided on the filter press box, and the pull-out assembly can drive the No. 1 filter press plate to reciprocate within the filter press box.

[0010] The lifting assembly connects the No. 1 filter press plate and the No. 2 filter press plate. When the pulling assembly moves the No. 1 filter press plate away from the No. 2 filter press plate, the lifting assembly can cause the No. 1 filter press plate and the No. 2 filter press plate to move upward and form a gap with the bottom of the filter press box.

[0011] A scraping assembly is disposed inside the filter press box and slides in contact with the No. 1 filter press plate and the No. 2 filter press plate. The scraping assembly can scrape off the filter residue on the No. 1 filter press plate and the No. 2 filter press plate when the No. 1 filter press plate and the No. 2 filter press plate are in motion.

[0012] As a further embodiment of the present invention: the pull-out assembly and the lifting assembly are connected to a power assembly disposed on the filter press box;

[0013] The power assembly includes a Maltese cross mechanism rotatably mounted on the filter press, and the Maltese cross mechanism is connected to a drive device disposed on the filter press.

[0014] The Maltese cross mechanism includes a drive wheel connected to the output shaft of the drive device. The drive wheel is adapted to a first driven wheel and a second driven wheel that are rotatably mounted on the filter press box. The first driven wheel is connected to the pull-out assembly via a first belt, and the second driven wheel is connected to the lifting assembly via a second belt.

[0015] As a further embodiment of the present invention: the pull-out assembly includes two drive wheels rotatably mounted on the filter press box, a drive belt is sleeved between the two drive wheels, and one of the drive wheels is connected to the first belt;

[0016] The pull-out assembly also includes a connecting plate that runs through the filter press box and connects to the first filter press plate. The connecting plate and the transmission belt are connected by a fitting structure.

[0017] As a further embodiment of the present invention: the fitting structure includes two guide rods disposed on the filter press box, a follower is slidably mounted on the guide rod, the follower is provided with a groove along its length, and the groove slides in cooperation with a slider rotatably mounted on the transmission belt;

[0018] The follower is connected to the connecting plate.

[0019] As a further embodiment of the present invention: the lifting assembly includes two lifting frames symmetrically arranged on the filter press box, and the lifting frames are slidably connected to the first filter press plate and the second filter press plate;

[0020] The lifting frame is also rotatably mounted with a pulley, which is in rolling cooperation with a cam rotatably mounted on the filter press box. The cam's shaft is connected to the second driven wheel via a second belt and a bevel gear set.

[0021] As a further embodiment of the present invention: a telescopic plate is slidably installed on both the No. 1 filter press plate and the No. 2 filter press plate, and two vertical shafts are symmetrically arranged on the telescopic plate. The vertical shafts are slidably connected to the hysteresis grooves arranged on the No. 1 filter press plate and the No. 2 filter press plate.

[0022] A spring is installed inside the hysteresis groove, with one end of the spring connected to the vertical shaft and the other end connected to the hysteresis groove.

[0023] As a further embodiment of the present invention: the scraping assembly includes a guide groove disposed on the side of the first filter plate and the second filter plate, and a scraper slidably connected to the first filter plate and the second filter plate, wherein the scraper is provided with a sliding connection part slidably connected to the guide groove;

[0024] The scraping assembly also includes a guide structure disposed between the scraper and the filter press.

[0025] As a further embodiment of the present invention: the guide structure includes a convex shaft disposed at the end of the scraper and a plurality of guide grooves disposed on the side wall of the filter press.

[0026] The multiple guide grooves gradually converge from bottom to top.

[0027] A method for filtering tantalum-niobium ore acid decomposition slurry using the aforementioned filter press includes the following steps:

[0028] Step 1: Connect the tantalum-niobium ore acid decomposition slurry pumping device to the filter press via pipeline;

[0029] Step 2: Start the tantalum-niobium ore acid decomposition slurry pumping device to pump the tantalum-niobium ore acid decomposition slurry into the filter press box;

[0030] Step 3: Drive the pull-out assembly to move one of the No. 1 filter press plates toward the adjacent No. 2 filter press plate. When the No. 1 filter press plate moves to the end of its stroke, the staggered No. 1 and No. 2 filter press plates overlap, thus completing the filtration action.

[0031] Step 4: Drain the solution from the filter press after filtration;

[0032] Step 5: Control the lifting component to create a gap between the No. 1 and No. 2 filter plates and the bottom of the filter press box. At the same time, pump clean water into the filter press box. Then, pull the component to drive the No. 1 and No. 2 filter plates to move in opposite directions. Under the action of the scraping component, the filter residue attached to the No. 1 and No. 2 filter plates is washed out of the filter press box.

[0033] Compared with the prior art, the beneficial effects of the present invention are:

[0034] By setting up a power component, the logic of the movement of the pulling and lifting components can be improved on the one hand, and the output load of the drive device can be effectively utilized on the other hand, avoiding the occurrence of excessive load on the drive device. Furthermore, when the first driven wheel is rotating, the second driven wheel is locked, so that the first and second filter plates and the telescopic plate can cooperate to fill the cross-section of the filter press box, thereby improving the stability of the filter pressing process.

[0035] By incorporating a pull-out assembly, a lifting assembly, and a scraping assembly, the scraper can move along the No. 1 and No. 2 filter press plates during the filtration process. This serves two purposes: firstly, it removes filter residue clogging the filter holes, improving the filtration efficiency; secondly, when the No. 1 and No. 2 filter press plates move in opposite directions, the scraper moves accordingly, working in conjunction with the clean water injected into the filter press chamber to better remove filter residue adhering to the side walls of the chamber, the No. 1 and No. 2 filter press plates. This allows the filter residue to flow out of the filter press chamber, resulting in fewer impurities in the chamber during the next filtration cycle. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of an embodiment of a filter press for acid decomposition of tantalum and niobium ore slurry and its filtration method.

[0037] Figure 2 This is a schematic diagram of the structure of a tantalum-niobium ore acid decomposition slurry filter press and its filtration method from another angle in one embodiment.

[0038] Figure 3 This is a schematic diagram of the power component in one embodiment of a tantalum-niobium ore acid decomposition slurry filter press and its filtration method.

[0039] Figure 4 This is a schematic diagram of the pull-out component in one embodiment of a tantalum-niobium ore acid decomposition slurry filter press and its filtration method.

[0040] Figure 5 This is a partial exploded view of the pull-out component in one embodiment of a filter press for acid decomposition of tantalum and niobium ore slurry and its filtration method.

[0041] Figure 6 This is a schematic diagram of the scraping component in one embodiment of a tantalum-niobium ore acid decomposition slurry filter press and its filtration method.

[0042] Figure 7 An exploded view of the connection configuration of the telescopic plate, scraper, and filter plate No. 1 or No. 2 in one embodiment of a filter press for acid decomposition of tantalum and niobium ore slurry and its filtration method.

[0043] In the diagram: 1. Filter press box; 2. Drive unit; 3. Drive wheel; 4. Driven wheel No. 1; 5. Belt No. 1; 6. Transmission wheel; 7. Transmission belt; 8. Slider; 9. Follower; 901. Slide groove; 10. Guide rod; 11. Connecting plate; 12. Guide groove; 13. Filter press plate No. 1; 14. Filter press plate No. 2; 15. Filter hole; 1501. Guide groove; 16. Telescopic plate; 17. Hysteresis groove; 18. Spring; 19. Vertical shaft; 20. Lifting frame; 21. Pulley; 22. Cam; 23. Belt No. 2; 24. Bevel gear set; 25. Driven wheel No. 2; 26. Scraper; 2601. Sliding connection; 2602. Cam shaft. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0046] Please see Figures 1 to 7 In this embodiment of the invention, a tantalum-niobium ore acid decomposition slurry filter press includes: a filter press box 1, a pull-out assembly, a lifting assembly, and a scraping assembly. When the first filter plate 13 and the second filter plate 14 are performing the filtration operation, the scraper 26 can move along the first filter plate 13 and the second filter plate 14. On the one hand, this removes the filter residue clogging the filter holes 15, improving the filtration effect. On the other hand, when the first filter plate 13 and the second filter plate 14 move in opposite directions, the scraper 26 moves in the opposite direction as well. Combined with the clean water injected into the filter press box 1, this better removes the filter residue adhering to the side wall of the filter press box 1, the first filter plate 13, and the second filter plate 14, allowing the filter residue to flow out of the filter press box 1, resulting in fewer impurities in the filter press box 1 during the next filtration operation.

[0047] Specifically, the filter press box 1 is provided with a first filter plate 13 and a second filter plate 14 arranged at equal intervals and alternately. Both the first filter plate 13 and the second filter plate 14 are provided with filter holes 15, and the filter holes 15 provided on the first filter plate 13 and the second filter plate 14 are staggered.

[0048] The pull-out assembly and the lifting assembly are connected to the power assembly installed on the filter press 1;

[0049] The power assembly includes a Maltese cross mechanism structure rotatably mounted on the filter press 1, and the Maltese cross mechanism structure is connected to a drive device 2 disposed on the filter press 1.

[0050] The Maltese cross-shaped mechanism includes a drive wheel 3 connected to the output shaft of the drive unit 2. The drive wheel 3 is adapted to a first driven wheel 4 and a second driven wheel 25 rotatably mounted on the filter press box 1. The first driven wheel 4 is connected to the pull-out assembly via a first belt 5, and the second driven wheel 25 is connected to the lifting assembly via a second belt 23.

[0051] The pull-out assembly is installed on the filter press box 1. The pull-out assembly can drive the first filter press plate 13 to reciprocate within the filter press box 1. The pull-out assembly includes two drive wheels 6 rotatably installed on the filter press box 1. A drive belt 7 is sleeved between the two drive wheels 6, and one of the drive wheels 6 is connected to the first belt 5.

[0052] The pull-out assembly also includes a connecting plate 11 that passes through the filter press box 1 and connects to the first filter press plate 13. The connecting plate 11 is connected to the transmission belt 7 through a fitting structure. The fitting structure includes two guide rods 10 disposed on the filter press box 1. A follower 9 is slidably mounted on the guide rod 10. The follower 9 has a groove 901 along its length direction. The groove 901 is slidably engaged with a slider 8 rotatably mounted on the transmission belt 7.

[0053] The follower 9 is connected to the connecting plate 11.

[0054] In use, the tantalum-niobium ore acid decomposition slurry pumping device injects the tantalum-niobium ore acid decomposition slurry into the filter press 1 through the connection port at the top of the filter press 1 until the filter press 1 is full of tantalum-niobium ore acid decomposition slurry. At this time, the drive device 2 is started. When the drive device 2 is working, it drives the drive wheel 3 connected to its output shaft to rotate, causing the first driven wheel 4 and the second driven wheel 25, which are adapted to the drive wheel 3, to rotate alternately. Specifically, when the drive wheel 3 cooperates with the first driven wheel 4 to rotate the first driven wheel 4, the second driven wheel 25 is in a locked state. When the drive wheel 3 cooperates with the second driven wheel 25 to rotate the second driven wheel 25, the first driven wheel 4 is in a locked state. This allows the pulling component and the lifting component to operate alternately.

[0055] Through the above settings, on the one hand, the logic of the movement of the pull-out component and the lifting component can be improved, and on the other hand, the output load of the drive device 2 can be effectively utilized, and the phenomenon of excessive load on the drive device 2 can be avoided. When the first driven wheel 4 is in the rotating state, the second driven wheel 25 is in the locked state, so that the first filter plate 13, the second filter plate 14 and the telescopic plate 16 can cooperate to fill the cross-section of the filter press box 1, thereby improving the stability during the filter pressing process.

[0056] Furthermore, when the first driven wheel 4 rotates, it will drive one of the transmission wheels 6 to rotate via the first belt 5, causing the transmission belt 7 sleeved between the two transmission wheels 6 to move. With the cooperation of the slider 8 and the slide groove 901, the connecting plate 11 can drive the first filter plate 13 connected to it to move, which in turn acts on the adjacent second filter plate 14. When the first filter plate 13 moves to the end of its stroke, the multiple alternately arranged first filter plates 13 and second filter plates 14 are in an overlapping and pressing state, thus completing the filtration action.

[0057] When the connecting plate 11 moves in the opposite direction following the follower 9, the first filter plate 13 connected to the connecting plate 11 will also move in the opposite direction. The two adjacent first filter plates 13 and second filter plates 14 are connected by a traction line (not shown in the figure), so that when the first filter plate 13 connected to the connecting plate 11 is reset, all the first filter plates 13 and second filter plates 14 will also be reset, thus improving the reusability of the device.

[0058] Please see Figure 1 , Figure 3 , Figure 4 , Figure 6 The lifting assembly connects the first filter plate 13 and the second filter plate 14. When the pulling assembly moves the first filter plate 13 away from the second filter plate 14, the lifting assembly can cause the first filter plate 13 and the second filter plate 14 to move upward and form a gap with the bottom of the filter box 1.

[0059] The lifting assembly includes two lifting frames 20 symmetrically arranged on the filter press 1, and the lifting frames 20 are slidably connected to the first filter press 13 and the second filter press 14.

[0060] A pulley 21 is rotatably mounted on the lifting frame 20. The pulley 21 rolls with a cam 22 rotatably mounted on the filter press box 1. The shaft of the cam 22 is connected to the driven wheel 25 via a second belt 23 and a bevel gear set 24.

[0061] Telescopic plates 16 are slidably installed on both the first filter plate 13 and the second filter plate 14. Two vertical shafts 19 are symmetrically arranged on the telescopic plates 16. The vertical shafts 19 are slidably connected to the hysteresis grooves 17 arranged on the first filter plate 13 and the second filter plate 14.

[0062] A spring 18 is provided inside the hysteresis groove 17. One end of the spring 18 is connected to the vertical shaft 19, and the other end is connected to the hysteresis groove 17.

[0063] The scraping assembly is disposed inside the filter press 1 and slides in contact with the first filter press plate 13 and the second filter press plate 14. The scraping assembly can scrape off the filter residue on the first filter press plate 13 and the second filter press plate 14 when the first filter press plate 13 and the second filter press plate 14 are in operation.

[0064] The scraping assembly includes a guide groove 1501 disposed on the side of the first filter plate 13 and the second filter plate 14, and a scraper 26 slidably connected to the first filter plate 13 and the second filter plate 14. The scraper 26 is provided with a sliding connection part 2601 slidably connected to the guide groove 1501.

[0065] The scraping assembly also includes a guide structure disposed between the scraper 26 and the filter press 1. The guide structure includes a convex shaft 2602 disposed at the end of the scraper 26 and a plurality of guide grooves 12 disposed on the side wall of the filter press 1.

[0066] The multiple guide grooves 12 gradually converge from bottom to top.

[0067] When the No. 1 filter plate 13 connected to the connecting plate 11 moves toward the adjacent No. 2 filter plate 14, the short shaft of the cam 22 is in contact with the pulley 21. At this time, under the action of the spring 18, the telescopic plate 16 will be sealed and slidably connected to the upper wall of the filter press box 1. The No. 1 filter plate 13 and the No. 2 filter plate 14 are connected to the bottom wall and side wall of the filter press box 1. When the No. 1 filter plate 13 and the No. 2 filter plate 14 move closer to each other, they can filter the tantalum-niobium ore acid decomposition slurry between the two adjacent No. 1 filter plates 13 and No. 2 filter plates 14. After the adjacent No. 1 filter plate 13 and No. 2 filter plate 14 overlap, the filtration action is completed.

[0068] When the connecting plate 11 drives the first filter plate 13 connected to it to move in the opposite direction, the second driven wheel 25 will rotate, so as to drive the cam 22 to rotate through the bevel gear set 24 and the second belt 23, so that the long shaft of the cam 22 abuts against the pulley 21. At this time, the lifting frame 20 will move upward, so that the first filter plate 13 and the second filter plate 14 move relative to the telescopic plate 16, compressing the spring 18. At the same time, a gap is formed between the first filter plate 13 and the second filter plate 14 and the bottom wall of the filter press box 1. When the connecting plate 11 moves in the opposite direction, the filter residue on the first filter plate 13 and the second filter plate 14 can be washed by injecting clean water into the filter press box 1. The water flows out of the filter press box 1 through the gap formed between the first filter plate 13 and the second filter plate 14 and the bottom wall of the filter press box 1, making it more convenient to clean the filter press box 1.

[0069] Furthermore, when the No. 1 filter press plate 13 and the No. 2 filter press plate 14 move, the scraper 26 connected to them will move. At the same time, the convex shaft 2602 and the guide groove 12 slide together, so that when the scraper 26 moves with the No. 1 filter press plate 13 and the No. 2 filter press plate 14, the scraper 26 will also perform a lifting and lowering action along the No. 1 filter press plate 13 and the No. 2 filter press plate 14. In this process, the scraper 26 can scrape off the filter residue attached to the No. 1 filter press plate 13 and the No. 2 filter press plate 14, thereby improving the filtration effect. When the No. 1 filter press plate 13 and the No. 2 filter press plate 14 move in the opposite direction, the scraper 26 will also move in the opposite direction. With the help of the clean water injected into the filter press box 1, the filter residue attached to the side wall of the filter press box 1, the No. 1 filter press plate 13 and the No. 2 filter press plate 14 can be better removed, so that the filter residue flows out of the filter press box 1, and there are fewer impurities in the filter press box 1 when filtration is performed next time.

[0070] With the above settings, when the No. 1 filter press 13 and the No. 2 filter press 14 are performing the filtration operation, the scraper 26 can move along the No. 1 filter press 13 and the No. 2 filter press 14. On the one hand, it can remove the filter residue clogging the filter holes 15 and improve the filtration effect. On the other hand, when the No. 1 filter press 13 and the No. 2 filter press 14 move in opposite directions, the scraper 26 moves in the opposite direction as well. With the clean water injected into the filter press 1, it can better remove the filter residue attached to the side wall of the filter press 1, the No. 1 filter press 13 and the No. 2 filter press 14, so that the filter residue flows out of the filter press 1 and there are fewer impurities in the filter press 1 when the next filtration is performed.

[0071] As an embodiment of the present invention, a method for filtering tantalum-niobium ore acid decomposition slurry using the aforementioned filter press is also provided, comprising the following steps:

[0072] Step 1: Connect the tantalum-niobium ore acid decomposition slurry pumping device to the filter press 1 via pipeline;

[0073] Step 2: Start the tantalum-niobium ore acid decomposition slurry pumping device to pump the tantalum-niobium ore acid decomposition slurry into the filter press 1;

[0074] Step 3: Drive the pull-out assembly to move one of the No. 1 filter press plates 13 toward the adjacent No. 2 filter press plate 14. When the No. 1 filter press plate 13 moves to the end of its stroke, the staggered No. 1 filter press plates 13 and No. 2 filter press plates 14 overlap, thus completing the filtration action.

[0075] Step 4: Drain the solution from filter press 1 after filtration;

[0076] Step 5: Control the lifting component to create a gap between the No. 1 filter plate 13, the No. 2 filter plate 14 and the bottom of the filter press box 1. At the same time, pump clean water into the filter press box 1. Then, pull the component to drive the No. 1 filter plate 13 and the No. 2 filter plate 14 to move in opposite directions. Under the action of the scraping component, the filter residue attached to the No. 1 filter plate 13 and the No. 2 filter plate 14 is washed out of the filter press box 1.

[0077] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0078] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A filter press for acid decomposition slurry of tantalum-niobium ore, characterized in that, include: A filter press box (1) is provided with a first filter plate (13) and a second filter plate (14) arranged at equal intervals and alternately inside the filter press box (1). Both the first filter plate (13) and the second filter plate (14) are provided with filter holes (15), and the filter holes (15) provided on the first filter plate (13) and the second filter plate (14) are staggered. A pull-out assembly is provided on the filter press (1), and the pull-out assembly can drive the first filter press plate (13) to reciprocate within the filter press (1); The lifting assembly connects the first filter plate (13) and the second filter plate (14). When the pulling assembly moves the first filter plate (13) away from the second filter plate (14), the lifting assembly can cause the first filter plate (13) and the second filter plate (14) to move upward and form a gap with the bottom of the filter box (1). The scraping assembly is installed inside the filter press (1) and slides in contact with the first filter press (13) and the second filter press (14). The scraping assembly can scrape off the filter residue on the first filter press (13) and the second filter press (14) when the first filter press (13) and the second filter press (14) are in motion. The scraping assembly includes a guide groove (1501) disposed on the side of the first filter plate (13) and the second filter plate (14) and a scraper (26) slidably connected to the first filter plate (13) and the second filter plate (14). The scraper (26) is provided with a sliding connection part (2601) slidably connected to the guide groove (1501). The scraping assembly also includes a guide structure disposed between the scraper (26) and the filter press (1); The guiding structure includes a convex shaft (2602) disposed at the end of the scraper (26) and a plurality of guide grooves (12) disposed on the side wall of the filter press (1). The multiple guide slots (12) gradually converge from bottom to top.

2. A tantalum-niobium ore acid decomposition slurry filter press according to claim 1, characterized in that, The pull-out assembly and the lifting assembly are connected to the power assembly installed on the filter press (1); The power assembly includes a Maltese cross mechanism structure rotatably mounted on the filter press (1), and the Maltese cross mechanism structure is connected to a drive device (2) disposed on the filter press (1). The Maltese cross mechanism includes a drive wheel (3) connected to the output shaft of the drive device (2). The drive wheel (3) is adapted to a first driven wheel (4) and a second driven wheel (25) rotatably mounted on the filter press (1). The first driven wheel (4) is connected to the pull-out assembly via a first belt (5), and the second driven wheel (25) is connected to the lifting assembly via a second belt (23).

3. A tantalum-niobium ore acid decomposition slurry filter press according to claim 2, characterized in that, The pull-out assembly includes two drive wheels (6) rotatably mounted on the filter press (1), a drive belt (7) is sleeved between the two drive wheels (6), and one of the drive wheels (6) is connected to the first belt (5); The pull-out assembly also includes a connecting plate (11) that runs through the filter press box (1) and connects to the first filter press plate (13). The connecting plate (11) and the transmission belt (7) are connected by a fitting structure.

4. A tantalum-niobium ore acid decomposition slurry filter press according to claim 3, characterized in that, The fitting structure includes two guide rods (10) disposed on the filter press (1), and a follower (9) is slidably mounted on the guide rods (10). The follower (9) has a groove (901) along its length direction, and the groove (901) is slidably engaged with a slider (8) rotatably mounted on the transmission belt (7). The follower (9) is connected to the connecting plate (11).

5. A tantalum-niobium ore acid decomposition slurry filter press according to claim 2, characterized in that, The lifting assembly includes two lifting frames (20) symmetrically arranged on the filter press box (1), and the lifting frames (20) are slidably connected to the first filter press plate (13) and the second filter press plate (14); A pulley (21) is also rotatably mounted on the lifting frame (20). The pulley (21) is in rolling cooperation with a cam (22) rotatably mounted on the filter press (1). The shaft of the cam (22) is connected to the driven wheel (25) via a second belt (23) and a bevel gear set (24).

6. A tantalum-niobium ore acid decomposition slurry filter press according to claim 1, characterized in that, Telescopic plates (16) are slidably installed on both the first filter plate (13) and the second filter plate (14). Two vertical shafts (19) are symmetrically arranged on the telescopic plates (16). The vertical shafts (19) are slidably connected to the hysteresis grooves (17) arranged on the first filter plate (13) and the second filter plate (14). A spring (18) is provided inside the hysteresis groove (17). One end of the spring (18) is connected to the vertical shaft (19), and the other end is connected to the hysteresis groove (17).

7. A method for filtering tantalum-niobium ore acid decomposition slurry using a filter press as described in claim 1, characterized in that, Includes the following steps: Step 1: Connect the tantalum-niobium ore acid decomposition slurry pumping device to the filter press (1) via pipeline; Step 2: Start the tantalum-niobium ore acid decomposition slurry pumping device to pump the tantalum-niobium ore acid decomposition slurry into the filter press (1); Step 3: Drive the pull-out assembly to move one of the No. 1 filter press plates (13) toward the adjacent No. 2 filter press plate (14). When the No. 1 filter press plate (13) moves to the end of its stroke, the No. 1 filter press plate (13) and the No. 2 filter press plate (14) that are staggered overlap, and the filter pressing action is completed. Step 4: Drain the solution from the filter press (1) after filtration; Step 5: Control the lifting component to create a gap between the No. 1 filter plate (13), the No. 2 filter plate (14) and the bottom of the filter press box (1), and pump clean water into the filter press box (1). Then, pull the component to drive the No. 1 filter plate (13) and the No. 2 filter plate (14) to move in opposite directions. Under the action of the scraping component, the filter residue attached to the No. 1 filter plate (13) and the No. 2 filter plate (14) is washed out of the filter press box (1).

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