A device for extracting rare earth oxides

Abstract

The present invention discloses a device for extracting rare earth oxides, belonging to the technical field of rare earth oxide extraction, comprising a main liquid suction plate and a secondary liquid suction plate connected by a concave-convex sliding structure, wherein the lower surfaces of the main liquid suction plate and the secondary liquid suction plate are evenly distributed with liquid suction holes penetrating both inner and outer sides thereof, and a one-way liquid suction nozzle is installed on the lower opening of each liquid suction hole, and a floating plate is provided below the main liquid suction plate and the secondary liquid suction plate, and the floating plate is provided with through holes penetrating both upper and lower sides thereof and corresponding one-to-one with the one-way liquid suction nozzles, the one-way liquid suction nozzles are movable and extend into the corresponding through holes, and the height of the lower end of the one-way liquid suction nozzle is the same as the lowest height within the movable range of the lower surface of the floating plate. The invention avoids the problem of being inconvenient to place the stirring mechanism on the outside of the stirring mechanism when the stirring mechanism is integrated with the reactor through a split structure, and can also descend on its own, thereby realizing automatic absorption of the solution containing rare earth oxides, which helps to improve the absorption efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of rare earth oxide extraction, in particular to a device for extracting rare earth oxide. Background Art

[0002] Rare earth elements play an irreplaceable and crucial role in modern industrial fields such as electronics, new energy, and environmental protection. Rare earth oxides are an important form of rare earth elements, and their extraction technology directly affects the utilization efficiency of rare earth resources and industrial development.

[0003] Traditionally, rare earth oxides have relied on chemical precipitation to extract them. By adding specific precipitants, rare earth ions are precipitated from solution. However, due to the complex chemical reactions, impurities are easily co-precipitated, which severely reduces the purity of rare earth oxides. This makes it impossible to meet the stringent purity requirements of high-end electronic chip manufacturing. To improve the purity of rare earth oxides, chemical precipitation has been gradually replaced by solvent extraction. Solvent extraction utilizes the differences in the distribution coefficients of different substances in immiscible solvents to separate and enrich rare earth elements.

[0004] The extraction device of rare earth oxides is mainly used for the layered solution formed by solvent extraction. The required rare earth oxides are extracted from the layered solution through the extraction device, thereby separating the rare earth oxides from other solutions.

[0005] The existing rare earth oxide extraction device still has the following technical problems when in use, such as:

[0006] Publication No. CN220459954U discloses a rare earth oxide extraction device. The device places an annular floating plate in a rare earth oxide reactor. The position of the annular floating plate is then controlled by a cylinder and a reduction motor. A surface solution containing the rare earth oxide is simultaneously sucked by a suction pump. Although the device can suck the surface solution containing the rare earth oxide, its overall structure is relatively complex, for example, it uses a reduction motor and a cylinder. In addition, the annular floating plate is a complete ring. This means that when the stirring mechanism is fixed relative to the reactor, the annular floating plate cannot be installed on the outside of the stirring mechanism, thereby limiting its use.

[0007] In addition, it requires staff to observe the liquid level to control the operation of the reduction motor, which is not conducive to the automatic descent of the annular float, thereby reducing the suction efficiency;

[0008] Therefore, a device for extracting rare earth oxides is needed to solve the above problems. Summary of the Invention

[0009] The purpose of the present invention is to provide a rare earth oxide extraction device to solve the problems raised in the above background technology that the existing rare earth oxide extraction device is not convenient for installation outside the stirring mechanism in the reactor, and the annular floating plate cannot descend by itself to improve the absorption efficiency.

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] A device for extracting rare earth oxides includes a main liquid suction plate and a secondary liquid suction plate connected by a concave-convex sliding structure, the lower surfaces of the main liquid suction plate and the secondary liquid suction plate are evenly distributed with liquid suction holes running through the inner and outer sides thereof, and a one-way liquid suction nozzle is installed on the lower end opening of each liquid suction hole, a floating plate is provided below the main liquid suction plate and the secondary liquid suction plate, and the floating plate is provided with through holes running through the upper and lower sides thereof and corresponding to the one-to-one liquid suction nozzles, the one-way liquid suction nozzles are movable into the corresponding through holes, the height of the lower end of the one-way liquid suction nozzle is the same as the lowest height within the movable range of the lower surface of the floating plate, the upper surfaces of the main liquid suction plate and the secondary liquid suction plate are both axially connected to a position control mechanism, and the upper ends of the two position control mechanisms are both axially connected to a bracket, and the floating plate is connected to the position control mechanism through an airflow direction regulating mechanism.

[0012] Preferably, the outer sides of the main liquid suction plate and the auxiliary liquid suction plate are fixedly connected to one end of the support tube, and the other end of the support tube is nested in one end of the corresponding support rod, the other end of the support rod is equipped with a caster, and a connecting spring is connected between one end of the support rod and the inside of the support tube.

[0013] Preferably, the main liquid suction plate and the auxiliary liquid suction plate are both arc-shaped structures with an arc angle of 180°, and the main liquid suction plate and the auxiliary liquid suction plate are both hollow structures, and the upper surfaces of the main liquid suction plate and the auxiliary liquid suction plate are both equipped with a sealed discharge port with a cover running through the interior thereof.

[0014] Preferably, the sides of the main liquid suction plate and the auxiliary liquid suction plate connected by the concave-convex sliding structure are both provided with magnets, and the magnetic poles of the opposite sides of the magnets on the main liquid suction plate and the auxiliary liquid suction plate are opposite.

[0015] Preferably, the position control mechanism includes a piston tube whose upper end is axially connected to the bracket, and the inner side of the lower end of the piston tube is seamlessly slidably connected to the upper end of the piston rod, and the upper surfaces of the main suction plate and the auxiliary suction plate are both axially connected to the lower ends of the corresponding piston rods, and the lower end of each piston tube is connected to an air collecting airbag that passes through the interior thereof, and each air collecting airbag is passed through and connected to two corresponding air guide tubes.

[0016] Preferably, the lower end of the piston tube is in sealed sliding connection with the middle portion of the piston tube.

[0017] Preferably, the air flow direction regulating mechanism includes air distribution boxes arranged on the upper surfaces of the main liquid suction plate and the auxiliary liquid suction plate, and there are four air distribution boxes. The two air distribution boxes on the main liquid suction plate and the two air distribution boxes on the auxiliary liquid suction plate are symmetrically arranged. The interior of the air distribution box is divided into two layers, upper and lower, by a partition plate, and the two lower layers of the two air distribution boxes on the main liquid suction plate and the two lower layers of the two air distribution boxes on the auxiliary liquid suction plate are connected through fixed connecting pipes. The lower layers of adjacent air distribution boxes on the main liquid suction plate and the auxiliary liquid suction plate are connected through detachable connecting pipes, and among the lower layers of the four air distribution boxes, only one is provided with an air guide hole that passes through to the outside for connecting to the air pump.

[0018] Preferably, the air flow direction regulating mechanism also includes air holes passing through both sides of the partition plate, and the inner top ends of the main liquid suction plate and the auxiliary liquid suction plate are also provided with air holes for passing through to the lower layer of the corresponding air distribution box. The lower surfaces of the main liquid suction plate and the auxiliary liquid suction plate are sealed with an axis column, and the lower end of the axis column is fixedly connected to the upper surface of the corresponding floating plate, the upper end of the axis column is fixedly connected with a two-way plug, and the two-way plug is arranged in the lower layer of the corresponding air distribution box, a disc protrusion is provided in the middle of the axis column, and a support spring is provided between the inner bottom surface of the main liquid suction plate and the auxiliary liquid suction plate and the corresponding disc protrusion.

[0019] Preferably, the bidirectional plug is composed of a rod structure and two frustum-shaped structures, the axes of the three are collinear, and the inner diameter of the air guide hole is between the maximum diameter and the minimum diameter of the frustum-shaped structure.

[0020] Preferably, the two frustum-shaped structures on the bidirectional plug face oppositely, and rubber sleeves for improving sealing are provided on the outer sides of the two frustum-shaped structures.

[0021] Compared with the prior art, the present invention has the following advantages: the rare earth oxide extraction device, through its split structure, can avoid the problem of being inconvenient to install the device outside the stirring mechanism when the stirring mechanism is integrated with the reactor; and the device can also descend automatically, thereby automatically sucking the solution containing the rare earth oxide, which helps to improve the efficiency of the extraction.

[0022] 1. The main liquid suction plate and the auxiliary liquid suction plate can be spliced ​​together through the concave-convex sliding structure, and the magnets provided on the splicing surfaces of the two can ensure that the positions of the two are relatively stable after splicing. This allows the main liquid suction plate and the auxiliary liquid suction plate to be separately placed in the reactor when the stirring mechanism is integrated with the reactor, and then assembled and spliced, avoiding the problem that the main liquid suction plate and the auxiliary liquid suction plate cannot be directly placed in the reactor and are placed outside the stirring mechanism.

[0023] 2. After the air guide hole is connected to the external air pump, if the float plate is not squeezed, the gas in the piston tube will pass through the air collecting bag, thereby generating negative pressure in the piston tube, so as to increase the length of the structure composed of the piston tube and the piston rod. When the float plate is squeezed to the upper end of the two-way plug to block the air hole on the partition plate, the lower end of the two-way plug will no longer block the air holes on the main suction plate and the auxiliary suction plate. Due to the action of the air pump, negative pressure will be generated in the main suction plate and the auxiliary suction plate, and the surface solution containing rare earth oxides can be sucked through the suction hole and the one-way suction nozzle. This makes it unnecessary to manually control the descent of the main suction plate and the auxiliary suction plate. They will automatically descend according to the situation of the float plate to absorb the surface solution containing rare earth oxides, thereby helping to improve the absorption efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the present invention when viewed from above;

[0026] Figure 3 It is a schematic diagram of the longitudinal cross-sectional structure of the present invention;

[0027] Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure of point A;

[0028] Figure 5 For the present invention Figure 3 A schematic diagram of the enlarged structure of point B;

[0029] Figure 6 This is a schematic diagram of the cross-sectional connection structure of the main liquid suction plate and the gas distribution box of the present invention;

[0030] Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure of point C in the middle;

[0031] Figure 8 It is a schematic diagram of the cross-sectional structure of the present invention.

[0032] In the figure: 1. Main suction plate; 2. Auxiliary suction plate; 3. Support tube; 4. Support rod; 5. Caster; 6. Sealed discharge port with cover; 7. Air distribution box; 8. Floating plate; 9. Bracket; 10. Through hole; 11. Piston tube; 12. Removable connecting pipe; 13. Connecting spring; 14. Suction hole; 15. One-way suction nozzle; 16. Concave-convex sliding structure; 17. Piston rod; 18. Air collecting airbag; 19. Air guide tube; 20. Partition plate; 21. Air guide hole; 22. Air vent; 23. Fixed connecting pipe; 24. Shaft column; 25. Support spring; 26. Two-way plug. DETAILED DESCRIPTION

[0033] 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.

[0034] See also Figure 1-Figure 7 , the present invention provides the following technical solutions:

[0035] Example 1:

[0036] In order to solve the problem that the complete annular floating plate cannot be put into the reactor and placed on the outside of the stirring mechanism when the reactor and the stirring mechanism are integrated in the previous rare earth oxide extraction device, the following technical solution is provided, specifically,

[0037] A device for extracting rare earth oxides includes a main liquid suction plate 1 and a secondary liquid suction plate 2 connected by a concave-convex sliding structure 16. The lower surfaces of the main liquid suction plate 1 and the secondary liquid suction plate 2 are evenly distributed with liquid suction holes 14 running through the inner and outer sides thereof, and a one-way liquid suction nozzle 15 is installed on the lower end opening of each liquid suction hole 14. The outer side surfaces of the main liquid suction plate 1 and the secondary liquid suction plate 2 are fixedly connected to one end of a support tube 3, and the other end of the support tube 3 is nested in one end of a corresponding support rod 4. The other end of the support rod 4 is installed with a caster 5, and a connecting spring 13 is connected between one end of the support rod 4 and the interior of the support tube 3.

[0038] The main liquid suction plate 1 and the auxiliary liquid suction plate 2 are both arc-shaped structures with an arc angle of 180 degrees, and the main liquid suction plate 1 and the auxiliary liquid suction plate 2 are both hollow structures. The upper surfaces of the main liquid suction plate 1 and the auxiliary liquid suction plate 2 are both equipped with a sealed discharge port 6 with a cover that runs through the interior thereof. The sides of the main liquid suction plate 1 and the auxiliary liquid suction plate 2 connected by the concave-convex sliding structure 16 are both provided with magnet pieces, and the magnetic poles of the opposite sides of the magnet pieces on the main liquid suction plate 1 and the auxiliary liquid suction plate 2 are opposite. When in use, the main liquid suction plate 1 and the auxiliary liquid suction plate 2 are first respectively sent into the reactor, and then the concave structure and the convex structure on the concave-convex sliding structure 16 are connected by sliding, thereby realizing the main liquid suction plate 1 and the auxiliary liquid suction plate 2. The liquid tray 2 is spliced. At this time, due to the effect of the magnet sheet, the relative stability of the positions of the main liquid suction tray 1 and the auxiliary liquid suction tray 2 can be guaranteed. Then, the main liquid suction tray 1 and the auxiliary liquid suction tray 2 are spliced ​​together and hung on the reactor through the bracket 9. In the above process, the caster 5 can be stably squeezed on the inner wall of the reactor by connecting the spring 13. Through the above splicing method, the problem that the main liquid suction tray 1 and the auxiliary liquid suction tray 2 cannot be easily delivered into the reactor when they are a whole can be avoided. In addition, the problem that the overall structure cannot be directly mounted on the outside of the stirring mechanism can also be solved. Subsequently, the gas distribution box 7 can be connected through the detachable connecting pipe 12.

[0039] Example 2:

[0040] In order to solve the problem that the annular float of the previous rare earth oxide extraction device cannot descend by itself and requires manual intervention, which is not conducive to self-absorption of the surface solution containing rare earth oxides and leads to poor absorption efficiency, the following technical solution is provided. Specifically, a float plate 8 is provided under the main liquid suction plate 1 and the auxiliary liquid suction plate 2, and the float plate 8 is provided with a through hole 10 that passes through the upper and lower sides thereof and corresponds one-to-one with the one-way liquid suction nozzle 15. The one-way liquid suction nozzle 15 is movable and extends into the corresponding through hole 10. The height of the lower end of the one-way liquid suction nozzle 15 is the same as the lowest height within the movable range of the lower surface of the float plate 8. The upper surfaces of the main liquid suction plate 1 and the auxiliary liquid suction plate 2 are both axially connected to a position control mechanism, and the upper ends of the two position control mechanisms are both axially connected to a bracket 9. The float plate 8 is connected to the position control mechanism through an airflow direction adjustment mechanism.

[0041] The position control mechanism includes a piston tube 11 whose upper end is axially connected to the bracket 9, and the upper end of the piston tube 11 is seamlessly slidably connected to the upper end of the piston rod 17 on the inner side. The upper surfaces of the main suction plate 1 and the auxiliary suction plate 2 are both axially connected to the lower ends of the corresponding piston rods 17. The lower end of each piston tube 11 is connected to an air collecting air bag 18 that passes through the interior of the piston tube, and each air collecting air bag 18 is passed through and connected to two corresponding air guide tubes 19. The lower end of the piston tube 11 is sealed and slidably connected to the middle part of the piston tube 11.

[0042] The airflow direction regulating mechanism includes an air distribution box 7 provided on the upper surface of the main liquid suction plate 1 and the auxiliary liquid suction plate 2, and there are four air distribution boxes 7. The two air distribution boxes 7 on the main liquid suction plate 1 and the two air distribution boxes 7 on the auxiliary liquid suction plate 2 are symmetrically arranged. The interior of the air distribution box 7 is divided into two layers, upper and lower, by a partition plate 20. The lower layers of the two air distribution boxes 7 on the main liquid suction plate 1 and the lower layers of the two air distribution boxes 7 on the auxiliary liquid suction plate 2 are connected by a fixed connecting pipe 23. The lower layers of the adjacent air distribution boxes 7 on the main liquid suction plate 1 and the auxiliary liquid suction plate 2 are connected by a detachable connecting pipe 12. Among the lower layers of the four air distribution boxes 7, only one is provided with an air guide hole 21 that passes through it to the outside for connecting with the air pump The air flow direction regulating mechanism further includes air holes 22 passing through both sides of the partition plate 20, and the inner top ends of the main liquid suction disc 1 and the auxiliary liquid suction disc 2 are also provided with air holes 22 for passing through to the lower layer of the corresponding gas distribution box 7. The lower surfaces of the main liquid suction disc 1 and the auxiliary liquid suction disc 2 are sealed and penetrated by a shaft column 24, and the lower ends of the shaft column 24 are fixedly connected to the upper surfaces of the corresponding floating plates 8. The upper ends of the shaft columns 24 are fixedly connected with a two-way plug 26, and the two-way plug 26 is arranged in the lower layer of the corresponding gas distribution box 7. A disc protrusion is provided in the middle of the shaft column 24, and a supporting spring 25 is provided between the inner bottom surfaces of the main liquid suction disc 1 and the auxiliary liquid suction disc 2 and the corresponding disc protrusion. When in use, the floating plate 8 is closest to the surface solution containing rare earth oxides. When the float plate 8 is not in contact with the surface solution, the air vent 22 on the partition plate 20 will not be blocked by the upper end of the two-way plug 26, which will cause the air guide hole 21 to be connected to the air pump. When the air pump works, it will absorb the gas in the piston tube 11, causing negative pressure in the piston tube 11, thereby lengthening the telescopic structure composed of the piston tube 11 and the piston rod 17, so that the main liquid suction disc 1 and the auxiliary liquid suction disc 2 as a whole move downward under the action of gravity. When the float plate 8 comes into contact with the surface solution, the float plate 8 continues to move downward, and the float plate 8 will move upward relative to the main liquid suction disc 1 and the auxiliary liquid suction disc 2 as a whole due to the buoyancy of the surface solution, thereby stretching the support spring 25, and at the same time the two-way plug 2 6 will block the air holes 22 on the partition plate 20, and the lower ends of the two-way plugs 26 will no longer block the air holes 22 on the main liquid suction pan 1 and the auxiliary liquid suction pan 2. This allows the air pump to generate negative pressure inside the main liquid suction pan 1 and the auxiliary liquid suction pan 2 when the air pump is working, and then the surface solution containing rare earth oxides can be sucked through the suction holes 14 and the one-way suction nozzle 15. In the above process, no staff intervention is required. The staff only needs to observe the situation of the stratified solution. When the suction operation is about to reach the solution below the surface solution, the air pump can be turned off, and the main liquid suction pan 1 and the auxiliary liquid suction pan 2 can be taken out from the reactor. Then, the solution containing rare earth oxides in the main liquid suction pan 1 and the auxiliary liquid suction pan 2 can be taken out by opening the sealed discharge port 6 with a cover.

[0043] The two-way plug 26 consists of a rod structure and two frustum-shaped structures, the axes of the three are collinear, the inner diameter of the air guide hole 21 is between the maximum diameter and the minimum diameter of the frustum-shaped structure, the two frustum-shaped structures on the two-way plug 26 face opposite directions, and rubber sleeves are provided on the outside of the two frustum-shaped structures to improve sealing.

[0044] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0045] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A device for extracting rare earth oxides, comprising a main liquid suction plate (1) and a secondary liquid suction plate (2) connected via a concave-convex sliding structure (16), characterized in that: The lower surfaces of the main liquid suction plate (1) and the auxiliary liquid suction plate (2) are uniformly distributed with liquid suction holes (14) penetrating the inner and outer sides thereof, and a one-way liquid suction nozzle (15) is installed on the lower opening of each liquid suction hole (14). A floating plate (8) is provided below the main liquid suction plate (1) and the auxiliary liquid suction plate (2), and the floating plate (8) is provided with through holes (10) penetrating the upper and lower sides thereof and corresponding to the one-way liquid suction nozzles (15) one by one. The one-way liquid suction nozzles (15) are movable and extend into the corresponding through holes (10). The height of the lower end of the one-way liquid suction nozzle (15) is the same as the lowest height within the movable range of the lower surface of the floating plate (8). The upper surfaces of the main liquid suction plate (1) and the auxiliary liquid suction plate (2) are both axially connected with a position control mechanism, and the two position control mechanisms are arranged on the upper surfaces of the main liquid suction plate (1) and the auxiliary liquid suction plate (2). The upper end of the mechanism is axially connected to a card frame (9), and the position control mechanism includes a piston tube (11) whose upper end is axially connected to the card frame (9), and the inner side of the lower end of the piston tube (11) is seamlessly slidably connected to the upper end of the piston rod (17), and the upper surfaces of the main suction plate (1) and the auxiliary suction plate (2) are axially connected to the lower ends of the corresponding piston rods (17), and the lower end of each piston tube (11) is connected to an air collecting air bag (18) that penetrates the interior thereof, and each air collecting air bag (18) is penetrated and connected to two corresponding air guide tubes (19), the lower end of the piston tube (11) is sealed and slidably connected to the middle part of the piston tube (11), and the floating plate (8) is connected to the position control mechanism through the air flow direction regulating mechanism. The flow direction regulating mechanism includes an air distribution box (7) provided on the upper surface of the main liquid suction plate (1) and the auxiliary liquid suction plate (2), and four air distribution boxes (7) are provided. The two air distribution boxes (7) on the main liquid suction plate (1) and the two air distribution boxes (7) on the auxiliary liquid suction plate (2) are symmetrically arranged. The interior of the air distribution box (7) is divided into an upper and lower layer by a partition plate (20), and the lower layers of the two air distribution boxes (7) on the main liquid suction plate (1) and the lower layers of the two air distribution boxes (7) on the auxiliary liquid suction plate (2) are connected by a fixed connecting pipe (23). The lower layers of the adjacent air distribution boxes (7) on the main liquid suction plate (1) and the auxiliary liquid suction plate (2) are connected by a detachable connecting pipe (12), and the lower layers of the four air distribution boxes (7) are connected. In the layer, only one is provided with an air guide hole (21) extending to the outside thereof for connecting to an air pump, and the air flow direction regulating mechanism also includes air holes (22) extending through both sides of the partition plate (20), and the inner tops of the main liquid suction plate (1) and the auxiliary liquid suction plate (2) are also provided with air holes (22) for extending to the lower layer of the corresponding air distribution box (7), the lower surfaces of the main liquid suction plate (1) and the auxiliary liquid suction plate (2) are both sealed with a shaft column (24) extending through them, and the lower end of the shaft column (24) is fixedly connected to the upper surface of the corresponding floating plate (8), the upper end of the shaft column (24) is fixedly connected with a two-way plug (26), and the two-way plug (26) is provided in the lower layer of the corresponding air distribution box (7), and the middle part of the shaft column (24) is provided with a disc protrusion,A supporting spring (25) is provided between the inner bottom surface of the main liquid suction disc (1) and the auxiliary liquid suction disc (2) and the corresponding disc protrusions.

2. The device for extracting rare earth oxides according to claim 1, characterized in that: The outer side surfaces of the main liquid suction plate (1) and the auxiliary liquid suction plate (2) are fixedly connected to one end of a support tube (3), and the other end of the support tube (3) is nested in one end of a corresponding support rod (4), the other end of the support rod (4) is equipped with a caster (5), and a connecting spring (13) is connected between one end of the support rod (4) and the interior of the support tube (3).

3. The device for extracting rare earth oxides according to claim 2, characterized in that: The main liquid suction plate (1) and the auxiliary liquid suction plate (2) are both arc-shaped structures with an arc angle of 180°, and the main liquid suction plate (1) and the auxiliary liquid suction plate (2) are both hollow structures. The upper surfaces of the main liquid suction plate (1) and the auxiliary liquid suction plate (2) are both equipped with a sealed discharge port (6) with a cover that passes through the interior thereof.

4. The device for extracting rare earth oxides according to claim 3, characterized in that: The main liquid suction plate (1) and the auxiliary liquid suction plate (2) are both provided with magnet pieces on the sides connected by the concave-convex sliding structure (16), and the magnetic poles of the magnet pieces on the main liquid suction plate (1) and the auxiliary liquid suction plate (2) are opposite.

5. The device for extracting rare earth oxides according to claim 4, characterized in that: The bidirectional plug (26) is composed of a rod structure and two truncated cone structures, the axes of the three being collinear, wherein the inner diameter of the air guide hole (21) is between the maximum diameter and the minimum diameter of the truncated cone structure.

6. The device for extracting rare earth oxides according to claim 5, characterized in that: The two frustum-shaped structures on the bidirectional plug (26) face opposite directions, and rubber sleeves for improving sealing are provided on the outsides of the two frustum-shaped structures.

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