Rare earth oxalate precipitation device
The rare earth oxalate precipitation device, with its multi-dimensional stirring and automatic scraping and drainage mechanism, solves the problems of uneven stirring, precipitate adhesion, and manual drainage in existing devices, and achieves a highly efficient and stable rare earth oxalate precipitation process.
Patent Information
- Application Number
- CN202610175583.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-06
- Publication Date
- 2026-05-05
AI Technical Summary
Existing rare earth oxalate precipitation devices suffer from poor production efficiency and product quality due to low stirring uniformity and efficiency, precipitate adhesion affecting purity and quality, and cumbersome drainage operations that rely on manual labor.
A multi-dimensional stirring method combined with an automatic scraping and drainage mechanism is adopted. The rotating component achieves uniform stirring of rare earth oxalates, scrapes off the attached precipitates, automatically drains water, and accelerates the reaction by combining crystallization pretreatment.
This improves the precipitation efficiency and purity of rare earth oxalates, reduces human intervention, ensures the consistency and stability of reaction conditions, and enhances production efficiency and product quality.
Smart Images
Figure CN121976040A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of rare earth oxalate recovery technology, specifically to a rare earth oxalate precipitation device. Background Technology
[0002] In the field of rare earth extraction and processing, rare earth oxalate precipitation is an important process step widely used to separate and purify rare earth elements from complex mother liquors. This process involves combining rare earth ions with oxalate ions to form insoluble rare earth oxalate precipitates, which are then processed to obtain rare earth oxides or other rare earth products. To overcome these challenges and improve the efficiency and product quality of rare earth oxalate precipitation, a rare earth oxalate precipitation device has been developed to achieve more efficient precipitation and more stable product quality.
[0003] However, existing rare earth oxalate precipitation devices employ a single stirring method, such as stirring solely by rotating a stirring paddle. While the rotation of the paddle generates fluid dynamics, helping to uniformly mix the rare earth feed solution and oxalic acid solution within the reaction vessel, and breaking up any agglomerates to keep the precipitate loose for subsequent filtration and separation, a single stirring paddle can easily lead to material agglomeration and stratification, resulting in low stirring uniformity and efficiency. This limits the effective contact area between materials, leading to incomplete reaction between oxalic acid and rare earth ions, thus affecting the precipitation efficiency and yield of rare earth oxalate. Secondly, during the precipitation of rare earth oxalates, the precipitate formed by the reaction of oxalic acid with rare earth ions tends to adhere to the inner surface of the precipitation tank, leading to severe surface contamination, reduced precipitation efficiency, and impact on the purity and quality of the precipitate. Furthermore, it increases the difficulty of subsequent operations and cleaning. Finally, existing rare earth oxalate precipitation devices require manual intervention during drainage, which is not only cumbersome to operate, but also prone to untimely or excessive wastewater discharge due to improper human operation, affecting production efficiency and ease of operation. Existing devices lack the ability to create favorable conditions by allowing crystals to react with water in the early stages of the reaction, which limits the reaction rate of oxalic acid and rare earth ions, thereby affecting the overall production efficiency and product quality.
[0004] To address this, a rare earth oxalate precipitation device is proposed. Summary of the Invention
[0005] The purpose of this invention is to provide a rare earth oxalate precipitation device to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a rare earth oxalate precipitation device for collecting a mixture of oxalic acid and rare earth ions, comprising a precipitation tank, several support legs, a ladder, an oxalic acid placement pipe, a rare earth ion placement pipe, a waste gas collection pipe, a water inlet pipe, a crystallization placement pipe, a filter screen, a one-way valve, a precipitate outlet, and a wastewater discharge pipe. A rotating assembly for stirring the mixture and scraping off precipitates adhering to the surface of the precipitation tank is provided in the middle of the inner cavity of the precipitation tank. A discharge assembly for discharging wastewater is provided at the bottom of the inner cavity of the precipitation tank. The discharge assembly includes a fixing block fixedly connected to the bottom of the inner cavity of the precipitation tank. A feeding assembly for automatically feeding oxalic acid and rare earth ions into the precipitation tank is provided at the top of the inner cavity of the precipitation tank.
[0007] Preferably, several of the supporting legs are arranged in a circular array and fixedly connected to the lower surface of the sedimentation tank; the ladder is fixedly connected to the top of the outer surface of the sedimentation tank; the oxalic acid placement pipe and the rare earth ion placement pipe are both fixedly connected to the upper surface of the sedimentation tank; one end of the waste gas collection pipe is fixedly connected to the top of the sedimentation tank, and the other end of the waste gas collection pipe is fixedly connected to an external receiving and collecting device; the water inlet pipe is fixedly connected to the inside of the sedimentation tank; the end of the water inlet pipe away from the sedimentation tank is rotatably connected to an opening door; the crystallization placement pipe is fixedly connected to the inside of the sedimentation tank; the filter screen is fixedly connected to the inner surface of the sedimentation tank near the water inlet pipe; the one-way valve is rotatably connected to the inner surface of the sedimentation tank near the crystallization placement pipe; the precipitate outlet is rotatably connected to the outer surface of the sedimentation tank and located above the fixed block; the wastewater discharge pipe is fixedly connected to the bottom of the inner cavity of the sedimentation tank; and a control valve is detachably installed at the end of the wastewater discharge pipe away from the sedimentation tank.
[0008] Preferably, the rotating assembly includes a fixed cross plate, which is fixedly connected to the top of the sedimentation tank cavity. Two feed plates are fixedly connected to the outer surface of the fixed cross plate. A drive column is rotatably connected to the bottom of the fixed cross plate. A connecting rod is fixedly connected to the lower surface of the fixed cross plate. A rotating ring is fixedly connected to the outer surface of the drive column. Telescopic rod one is fixedly connected in a circular array on the lower surface of the rotating ring. Telescopic rod two is fixedly connected to the upper surface of the fixed block. A fixed gear is fixedly connected to the telescopic end of telescopic rod two. A limiting plate one is fixedly connected to the top of the fixed gear. A limiting plate two is fixedly connected to the bottom of the fixed gear. A sliding groove is formed from the top of the limiting plate one through to the bottom of the telescopic rod two. The telescopic rod has a rotating housing rotatably connected to its outer surface. The rotating housing has symmetrically spaced limit grooves at its bottom. Connecting blocks are symmetrically fixed to the top of the rotating housing's inner cavity. Rotating gears are rotatably connected to the ends of the two connecting blocks away from the top of the rotating housing's inner cavity. Rotating rods are fixedly connected to the bottoms of the two rotating gears. Stirring rods are fixedly connected to the bottoms of the two rotating rods. Connecting frames are symmetrically fixed to both sides of the lower surface of the rotating housing. Straight rods are fixedly connected to the ends of the two connecting frames away from the rotating housing. Scraping blocks are fixedly connected to the ends of the two straight rods away from the connecting frames. A rotating groove is formed on the upper surface of the rotating housing, and limit rods are symmetrically fixed to the inner surface of the rotating groove.
[0009] Preferably, the discharge assembly further includes a fixing frame, which is fixedly connected to the bottom of the sedimentation tank cavity and located below the fixing block. The upper surface of the fixing frame is fixedly connected with telescopic springs arranged in a cross array. Each telescopic spring is fixedly connected to a lower pressure plate at the end away from the fixing frame. The upper surface of the lower pressure plate is fixedly connected with sealing columns arranged in a circular array.
[0010] Preferably, the feeding assembly includes a sliding Z-bar and a sliding vertical bar. The sliding Z-bar and the sliding vertical bar are respectively slidably connected to the outer surfaces of the two feeding plates of the fixed cross plate. A rotating column one is rotatably connected to the bottom of the inner cavity of the rare earth ion placement tube. A rotating door one is fixedly connected to the outer surface of the rotating column one. A rotating column two is rotatably connected to the bottom of the inner cavity of the rare earth ion placement tube. A rotating door two is fixedly connected to the outer surface of the rotating column two.
[0011] Preferably, the drive column is driven and mounted on the built-in drive motor, which is electrically connected to an external controller. The connecting rod is rotatably connected inside the drive column. The outer surface of the connecting rod away from the drive column has a bidirectional threaded groove. The end of the telescopic rod away from the rotating ring is fixedly connected to the upper surface of the rotating housing. The fixed gear meshes with the rotating gear. The rotating gear is rotatably connected between the first limiting plate and the second limiting plate. The scraping block is adapted to the inner surface of the sedimentation tank. The limiting rod is slidably connected in the bidirectional threaded groove on the outer surface of the connecting rod.
[0012] Preferably, the outer surface of the fixing block is provided with drainage grooves arranged in a circular array, and each of the sealing columns seals each drainage groove of the fixing block.
[0013] Preferably, both ends of the first and second rotating columns are provided with torsion springs, the top of the sliding Z-rod abuts against the lower surface of the rotating door, the bottom of the sliding Z-rod abuts against the upper surface of the rotating housing, the top of the sliding vertical rod abuts against the outer surface of the second rotating door, and the bottom of the sliding vertical rod abuts against the upper surface of the rotating housing.
[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. The rotating shell rotates and slides up and down as the connecting rod rotates, which in turn causes the stirring rod to revolve around the connecting rod while sliding up and down. This ensures that the rare earth oxalate in the sedimentation tank is uniformly stirred. This multi-dimensional stirring method helps to break up the agglomeration and stratification of materials, improves the uniformity and efficiency of stirring, and helps the rare earth solution and oxalic acid to contact and react more fully, thereby improving the precipitation efficiency and yield of rare earth oxalate. The up and down sliding of the stirring rod helps to prevent rare earth oxalate from depositing and clogging at the bottom or side walls of the sedimentation tank. The rotation of the rotating shell also drives the scraper to rotate, thereby scraping the inner surface of the precipitation tank. During the precipitation of rare earth oxalate, the precipitate formed by the reaction of oxalic acid and rare earth ions will adhere to the inner surface of the precipitation tank, which will reduce the precipitation efficiency and affect the purity and quality of the precipitate. The rotation of the scraper can remove the reactants adhering to the inner surface in time, keep the inner cavity clean and smooth, thereby improving the purity and quality of the final product, and also facilitating subsequent operation and cleaning. The stirring rod revolves around the connecting rod while sliding up and down and rotating around the center of the rotating gear. This combined motion of the stirring rod can more comprehensively cover all areas in the precipitation tank, ensuring that the rare earth oxalate solution is more thoroughly stirred. This increases the contact opportunities between oxalic acid and rare earth ions, accelerates the reaction rate, shortens the reaction time, and improves the precipitation efficiency and yield of rare earth oxalate. 2. The precipitation produced by rare earth oxalate increases the weight borne by the lower plate, thereby causing the block to stop blocking the drainage channel of the fixed block. This allows the wastewater inside the sedimentation tank to be discharged from the drainage channel of the fixed block, thus realizing an automated drainage mechanism. This reduces the need for manual intervention, improves production efficiency and ease of operation, and ensures that wastewater is discharged at the appropriate time without the need for manual monitoring or operation, thereby saving manpower and time costs. The wastewater can be more easily centrally treated or recycled after being discharged from the drainage trough of the fixed block, while the resulting sediment will remain on the upper surface of the fixed block, which is conducive to the collection and subsequent treatment of the sediment and further improves the efficiency of resource utilization. 3. The crystallization process first reacts with water, providing favorable conditions for the subsequent chemical reaction between oxalic acid and rare earth ions. Water, as the reaction medium, can accelerate the diffusion and contact between ions, thereby speeding up the reaction rate. Then, the rotation of the rotating shell automatically opens rotating doors one and two, realizing the automatic placement of oxalic acid and rare earth ions. This helps to generate rare earth oxalates with higher purity and quality, reduces the influence of inaccurate reverse placement time on the reactants, ensures the consistency and stability of reaction conditions, and thus improves the quality of the product. Attached Figure Description
[0015] Figure 1 This is a three-dimensional schematic diagram of the external structure of the sedimentation tank shown in this invention; Figure 2 This is a three-dimensional schematic diagram of the internal structural positional relationship of the sedimentation tank of the present invention; Figure 3 This is a three-dimensional schematic diagram showing the positional relationship of the feeding components of the present invention; Figure 4 This is a three-dimensional schematic diagram of the positional relationship of the internal structure of the rotating housing of the present invention; Figure 5 This is a three-dimensional schematic diagram of the internal structural positional relationship of the discharge component of the present invention; Figure 6 As shown in this invention Figure 5 A magnified view of the structure at point A in the diagram; Figure 7 As shown in this invention Figure 5 A magnified view of the structure at point B in the diagram; Figure 8 This is a three-dimensional schematic diagram showing the positional relationship between the connecting frame and the rotating housing of the present invention; Figure 9 As shown in this invention Figure 8 A magnified view of the structure at point C in the diagram; Figure 10 This is a three-dimensional schematic diagram showing the positional relationship between the fixed gear and the rotating gear of the present invention.
[0016] In the picture: 1. Sedimentation tank; 11. Support legs; 12. Ladder; 13. Oxalic acid placement pipe; 14. Rare earth ion placement pipe; 15. Waste gas collection pipe; 16. Water inlet pipe; 17. Crystallization placement pipe; 18. Filter screen; 19. One-way valve; 110. Sediment outlet; 111. Wastewater discharge pipe; 2. Rotating assembly; 21. Fixed cross plate; 22. Drive column; 23. Connecting rod; 24. Rotating ring; 25. Telescopic rod one; 26. Telescopic rod two; 27. Fixed gear; 28. Limiting plate one; 29. Limiting plate two; 210. Sliding groove; 211. Rotating housing; 212. Limiting groove; 213. Connecting block; 214. Rotating gear; 215. Rotating rod; 216. Stirring rod; 217. Connecting frame; 218. Linear rod; 219. Scraping block; 220. Limiting rod; 3. Discharge assembly; 31. Fixing frame; 32. Telescopic spring; 33. Lower pressure plate; 34. Sealing column; 35. Fixing block; 4. Feeding assembly; 41. Sliding Z-bar; 42. Sliding vertical bar; 43. Rotating column one; 44. Rotating door one; 45. Rotating column two; 46. Rotating door two. Detailed Implementation
[0017] 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 protection scope of the present invention.
[0018] Please see Figures 1 to 10 The present invention provides an embodiment of a rare earth oxalate precipitation device for collecting a mixture of oxalic acid and rare earth ions. The device includes a precipitation tank 1, several support legs 11, a ladder 12, an oxalic acid placement pipe 13, a rare earth ion placement pipe 14, a waste gas collection pipe 15, a water inlet pipe 16, a crystallization placement pipe 17, a filter screen 18, a one-way valve 19, a precipitate outlet 110, and a wastewater discharge pipe 111. A rotating assembly 2 is provided in the middle of the inner cavity of the precipitation tank 1 for stirring the mixture and scraping off the precipitate adhering to the inner surface of the inner cavity of the precipitation tank 1. A discharge assembly 3 is provided at the bottom of the inner cavity of the precipitation tank 1 for discharging wastewater. The discharge assembly 3 includes a fixing block 35, which is fixedly connected to the bottom of the inner cavity of the precipitation tank 1. A feeding assembly 4 is provided at the top of the inner cavity of the precipitation tank 1 for automatically feeding oxalic acid and rare earth ions into the interior of the precipitation tank 1.
[0019] Several supporting legs 11 are arranged in a circular array and fixedly connected to the lower surface of the sedimentation tank 1. The ladder 12 is fixedly connected to the top of the outer surface of the sedimentation tank 1. The oxalic acid placement pipe 13 and the rare earth ion placement pipe 14 are both fixedly connected to the upper surface of the sedimentation tank 1. One end of the waste gas collection pipe 15 is fixedly connected to the top of the sedimentation tank 1, and the other end of the waste gas collection pipe 15 is fixedly connected to an external gas collection pipe. The water inlet pipe 16 is fixedly connected to the inside of the sedimentation tank 1. The end of the water inlet pipe 16 away from the sedimentation tank 1 is rotatably connected to an opening door. The crystallization placement pipe 17 is fixedly connected to the inside of the sedimentation tank 1. The filter screen 18 is fixedly connected to the inner surface of the sedimentation tank 1 near the water inlet pipe 16. The one-way valve 19 is rotatably connected to the inner surface of the sedimentation tank 1 near the crystallization placement pipe 17. The sediment discharge port 110 is rotatably connected to the outer surface of the sedimentation tank 1 and is located above the fixing block 35. The wastewater discharge pipe 111 is fixedly connected to the bottom of the inner cavity of the sedimentation tank 1. The end of the wastewater discharge pipe 111 away from the sedimentation tank 1 is detachably equipped with a control valve.
[0020] Rotating assembly 2 includes a fixed cross plate 21, which is fixedly connected to the top of the inner cavity of the sedimentation tank 1. Two feed plates are fixedly connected to the outer surface of the fixed cross plate 21. A drive column 22 is rotatably connected to the bottom of the fixed cross plate 21. A connecting rod 23 is fixedly connected to the lower surface of the fixed cross plate 21. A rotating ring 24 is fixedly connected to the outer surface of the drive column 22. Telescopic rod 25 is fixedly connected to the lower surface of the rotating ring 24 in a circular array. A second telescopic rod 26 is fixedly connected to the upper surface of the fixed block 35. A fixed gear 27 is fixedly connected to the telescopic end of the second telescopic rod 26. A limit plate 28 is fixedly connected to the top of the fixed gear 27. A second limit plate 29 is fixedly connected to the bottom of the fixed gear 27. A sliding groove 210 is formed from the top of the limit plate 28 to the bottom of the second telescopic rod 26. A rotating... The housing 211 has symmetrically provided limiting grooves 212 at its bottom. Connecting blocks 213 are symmetrically fixedly connected to the top of the inner cavity of the housing 211. Rotating gears 214 are rotatably connected to the ends of the two connecting blocks 213 away from the top of the inner cavity of the housing 211. Rotating rods 215 are fixedly connected to the bottom of the two rotating gears 214. Stirring rods 216 are fixedly connected to the bottom of the two rotating rods 215. Connecting frames 217 are symmetrically fixedly connected to both sides of the lower surface of the housing 211. Straight rods 218 are fixedly connected to the ends of the two connecting frames 217 away from the housing 211. Scraping blocks 219 are fixedly connected to the ends of the two straight rods 218 away from the connecting frames 217. A rotating groove is provided on the upper surface of the housing 211. Limiting rods 220 are symmetrically fixedly connected to the inner surface of the rotating groove of the housing 211.
[0021] The discharge assembly 3 also includes a fixing frame 31, which is fixedly connected to the bottom of the inner cavity of the sedimentation tank 1 and located below the fixing block 35. The upper surface of the fixing frame 31 is fixedly connected with telescopic springs 32 arranged in a cross array. Each telescopic spring 32 is fixedly connected to a lower pressure plate 33 at the end away from the fixing frame 31. The upper surface of the lower pressure plate 33 is fixedly connected with sealing columns 34 arranged in a circular array.
[0022] The feeding assembly 4 includes a sliding Z-bar 41 and a sliding vertical bar 42. The sliding Z-bar 41 and the sliding vertical bar 42 are respectively slidably connected to the outer surfaces of the two feeding plates of the fixed cross plate 21. A rotating column 43 is rotatably connected to the bottom of the inner cavity of the rare earth ion placement tube 14. A rotating door 44 is fixedly connected to the outer surface of the rotating column 43. A rotating column 45 is rotatably connected to the bottom of the inner cavity of the rare earth ion placement tube 14. A rotating door 46 is fixedly connected to the outer surface of the rotating column 45.
[0023] The drive column 22 is driven and mounted on the built-in drive motor, which is electrically connected to the external controller. The connecting rod 23 is rotatably connected inside the drive column 22. The outer surface of the end of the connecting rod 23 away from the drive column 22 has a bidirectional threaded groove. The end of the telescopic rod 25 away from the rotating ring 24 is fixedly connected to the upper surface of the rotating housing 211. The fixed gear 27 meshes with the rotating gear 214. The rotating gear 214 is rotatably connected between the limiting plate 28 and the limiting plate 29. The scraping block 219 is adapted to the inner surface of the sedimentation tank 1. The limiting rod 220 is slidably connected in the bidirectional threaded groove on the outer surface of the connecting rod 23.
[0024] The outer surface of the fixing block 35 is arranged in a circular array with drainage grooves running through it, and each sealing post 34 seals each drainage groove of the fixing block 35.
[0025] Both ends of rotating column 43 and rotating column 45 are equipped with torsion springs. The top of sliding Z rod 41 abuts against the lower surface of rotating door 44, the bottom of sliding Z rod 41 abuts against the upper surface of rotating housing 211, the top of sliding vertical rod 42 abuts against the outer surface of rotating door 46, and the bottom of sliding vertical rod 42 abuts against the upper surface of rotating housing 211.
[0026] The working principle of the present invention, based on the above implementation, is as follows: In the initial state: the oxalic acid placement tube 13 and the rare earth ion placement tube 14 are not connected to the precipitation tank 1, the one-way valve 19 is not opened, the telescopic spring 32 is not compressed, the sealing column 34 blocks the drainage groove of the fixing block 35, the first telescopic rod 25 is in the extended state, the second telescopic rod 26 is in the retracted state, the stirring rod 216 is located at the bottom of the inner cavity of the precipitation tank 1 and the lower surface of the stirring rod 216 is in contact with the upper surface of the fixing block 35, the scraping block 219 is located at the bottom of the inner cavity of the precipitation tank 1, the limiting rod 220 is located inside the bidirectional threaded groove of the connecting rod 23 and away from the fixing cross plate 21, the second rotating door 46 blocks the oxalic acid placement tube 13, and the first rotating door 44 blocks the rare earth ion placement tube 14.
[0027] Preparation: The operator manually pushes the one-way valve 19 to open it. Then, the rare earth crystals are placed from the crystal placement tube 17 into the sedimentation tank 1. The operator then opens the door and pours appropriate water into the sedimentation tank 1 through the water inlet pipe 16, allowing the crystals to react with water first. The water molecules promote the activation of the crystal surface, creating favorable conditions for the subsequent reaction with oxalic acid. After the pretreatment of the rare earth crystals is completed, oxalic acid is placed in the oxalic acid placement tube 13 and rare earth ions are placed in the rare earth ion placement tube 14.
[0028] During work: Revolution of stirring rod 216: Once the above preparations are completed, the operator will electrically control the built-in drive motor to start via an external controller. The built-in drive motor will start and drive the drive column 22 to rotate. The rotation of the drive column 22 will cause the rotating ring 24 to rotate around the axis of the connecting rod 23. The rotation of the rotating ring 24 will cause the telescopic rod 25 to rotate around the axis of the connecting rod 23. The rotation of the telescopic rod 25 will cause the rotating housing 211 to rotate around the axis of the connecting rod 23. The rotation of the rotating housing 211 will cause the connecting block 213 to rotate around the axis of the connecting rod 23. The rotation of the connecting block 213 will cause the rotating gear 214 to rotate around the axis of the connecting rod 23. The rotation of the rotating gear 214 will cause the rotating rod 215 to rotate around the axis of the connecting rod 23. The rotation of the rotating rod 215 will cause the stirring rod 216 to rotate around the axis of the connecting rod 23. In the above description, as the rotating housing 211 rotates, it drives the limiting rod 220, which is fixedly connected to it, to rotate. Since the limiting rod 220 is slidably connected in the bidirectional threaded groove, its rotation will rise along the trajectory of the bidirectional threaded groove. The rising of the limiting rod 220 drives the rotating housing 211 to rise, and the rising rotating housing 211 abuts against the lower surface of the telescopic rod 25, thereby causing the telescopic rod 25 to retract. Simultaneously, the rising of the rotating housing 211 drives the connecting block 213 to rise, and the rising of the connecting block 213 drives the rotating gear 214 to rise. Since the rotating gear 214 is rotatably connected between the limiting plate 28 and the limiting plate 29, the rising of the rotating gear 214 drives the limiting plates 28 and 29 to rise synchronously. The rising of 29 drives the fixed gear 27 to rise, which in turn drives the telescopic rod 26 to rise. At this time, the telescopic rod 26 is no longer in a retracted state. The rotation of the drive column 22 drives the rotating housing 211 to rotate while sliding up and down. This causes the stirring rod 216 to revolve around the connecting rod 23 while sliding up and down, ensuring that the rare earth oxalate inside the sedimentation tank 1 is uniformly stirred. This multi-dimensional stirring method helps to break the agglomeration and stratification of materials, improves the uniformity and efficiency of stirring, and helps the rare earth solution and oxalic acid to contact and react more fully, thereby improving the precipitation efficiency and yield of rare earth oxalate. The up and down sliding of the stirring rod 216 helps to prevent rare earth oxalate from depositing and clogging at the bottom or side wall of the sedimentation tank 1. Finally, as the drive column 22 rotates continuously, the limit rod 220 rotates inside the bidirectional threaded groove and moves up and down reciprocally. The above-mentioned motion state also rotates synchronously and moves up and down synchronously with the movement of the limit rod 220.
[0029] The entry of rare earth ions and oxalic acid: As described above, as the rotating housing 211 rises, it abuts against the sliding Z-rod 41 and the sliding vertical rod 42. At this time, the sliding Z-rod 41 and the sliding vertical rod 42, under the action of the rotating housing 211, slide upwards along the outer surfaces of the two feed plates of the fixed cross plate 21. As the sliding Z-rod 41 and the sliding vertical rod 42 slide upwards, they abut against rotating door one 44 and rotating door two 46, causing them to rotate. Specifically, rotating door two 46, under the abutment of the sliding vertical rod 42, rotates around the center of rotating column two 45, and rotating door one 44, under the abutment of the sliding Z-rod 41, rotates around the center of rotating column one 43. At this time, the spring undergoes elastic deformation under the abutment force, and the oxalic acid and rare earth ions located inside the oxalic acid placement tube 13 and the rare earth ion placement tube 14 are automatically fed into the precipitation tank 1 due to the rotation of rotating door two 46 and rotating door one 44. Finally... When the rotating housing 211 moves to its highest position, the operator electrically drives the built-in drive motor to rotate in the opposite direction via an external controller. As the built-in drive motor rotates in the opposite direction, it drives the drive column 22 to move in the opposite direction. Finally, the rotating housing 211 will move downward and return to its initial state. Under the action of the elastic potential energy of the torsion spring, the rotating gate 26 and the rotating gate 14 return to their initial state. The crystallization reacts with water first, providing favorable conditions for the subsequent chemical reaction of oxalic acid and rare earth ions. Water, as a reaction medium, can accelerate the diffusion and contact between ions, thereby speeding up the reaction rate. Then, the rotation of the rotating housing 211 automatically opens the rotating gate 14 and the rotating gate 26, realizing the automatic placement of oxalic acid and rare earth ions. This helps to generate rare earth oxalates with higher purity and quality, reduces the influence of inaccurate reverse placement time on the reactants, ensures the consistency and stability of reaction conditions, and thus improves the quality of the product.
[0030] Rotation of stirring rod 216: During the revolution of the stirring rod 216, the rotation of the connecting block 213 drives the rotating gear 214 to rotate around the center of the connecting rod 23. Since the fixed gear 27 meshes with the rotating gear 214, when the rotating gear 214 rotates around the center of the connecting rod 23, it will mesh with the outer surface of the fixed gear 27, thereby realizing the rotation of the rotating gear 214. The rotation of the rotating gear 214 drives the rotating rod 215 to rotate, and the rotation of the rotating rod 215 drives the stirring rod 216 to rotate, ensuring that the rare earth oxalate solution is more thoroughly stirred, increasing the contact opportunities between oxalic acid and rare earth ions, and accelerating the reaction rate. Finally, the waste gas generated after the reaction will enter the waste gas collection pipe 15 connected to the top of the sedimentation tank 1 and be collected and treated.
[0031] Scrape the inner surface of sedimentation tank 1: As described above, with the entry of rare earth ions and oxalic acid and the continuous stirring of the stirring rod 216, precipitates will be generated inside the sedimentation tank 1, and some of the precipitates will adhere to the inner surface of the sedimentation tank 1. At this time, the reciprocating motion of the rotating housing 211 drives the connecting frame 217 to reciprocate motion and rotate. The reciprocating motion and rotation of the connecting frame 217 drives the linear rod 218 to reciprocate motion and rotate. The reciprocating motion and rotation of the linear rod 218 drives the scraping block 219 to reciprocate motion and rotate. Since the scraping block 219 is compatible with the inner surface of the sedimentation tank 1, as the scraping block 219 moves, the precipitates on the inner surface of the sedimentation tank 1 will be scraped off and fall onto the upper surface of the fixed block 35.
[0032] Wastewater discharge: As precipitates form, the gravity acting on the fixed block 35 increases. Under the influence of gravity, the sealing column 34 experiences a downward pressure, which in turn causes the lower pressure plate 33 to experience a downward pressure. The lower pressure plate 33, in turn, causes the telescopic spring 32 to contract. Simultaneously, under the influence of gravity, the sealing column 34 no longer blocks the drainage channel of the fixed block 35, and the wastewater flows from the drainage channel of the fixed block 35 into the wastewater discharge pipe 111 and is eventually collected. The precipitates formed remain on the upper surface of the fixed block 35. After the reaction is complete, the operator shuts off the built-in drive motor via an external controller and then opens the precipitate outlet 110 to collect the reactants, further improving resource utilization efficiency.
[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A rare earth oxalate precipitation device for collecting oxalic acid mixed with rare earth ions, comprising a precipitation tank (1), several support legs (11), a ladder (12), an oxalic acid placement pipe (13), a rare earth ion placement pipe (14), a waste gas collection pipe (15), a water inlet pipe (16), a crystallization placement pipe (17), a filter screen (18), a one-way valve (19), a precipitate outlet (110), and a wastewater discharge pipe (111), characterized in that: The sedimentation tank (1) is provided with a rotating assembly (2) in the middle of its inner cavity for stirring the mixture and scraping off the sediments adhering to the inner surface of the sedimentation tank (1). The sedimentation tank (1) is provided with a discharge assembly (3) at the bottom of its inner cavity for discharging wastewater. The discharge assembly (3) includes a fixing block (35) which is fixedly connected to the bottom of the sedimentation tank (1). The sedimentation tank (1) is provided with a feeding assembly (4) at the top of its inner cavity for automatically feeding oxalic acid and rare earth ions into the sedimentation tank (1).
2. The rare earth oxalate precipitation device according to claim 1, characterized in that: Several of the aforementioned support legs (11) are arranged in a circular array and fixedly connected to the lower surface of the sedimentation tank (1). The ladder (12) is fixedly connected to the top of the outer surface of the sedimentation tank (1). The oxalic acid placement tube (13) and the rare earth ion placement tube (14) are both fixedly connected to the upper surface of the sedimentation tank (1). One end of the waste gas collection pipe (15) is fixedly connected to the top of the sedimentation tank (1), and the other end of the waste gas collection pipe (15) is fixedly connected to an external receiving device. The water inlet pipe (16) is fixedly connected to the inside of the sedimentation tank (1), and the end of the water inlet pipe (16) away from the sedimentation tank (1) is rotatably connected to an open... When the door is opened, the crystallization placement tube (17) is fixedly connected to the inside of the sedimentation tank (1), the filter screen (18) is fixedly connected to the inner surface of the sedimentation tank (1) near the water inlet pipe (16), the one-way valve (19) is rotatably connected to the inner surface of the sedimentation tank (1) near the crystallization placement tube (17), the sediment outlet (110) is rotatably connected to the outer surface of the sedimentation tank (1) and located above the fixing block (35), the wastewater discharge pipe (111) is fixedly connected to the bottom of the inner cavity of the sedimentation tank (1), and a control valve is detachably installed at the end of the wastewater discharge pipe (111) away from the sedimentation tank (1).
3. The rare earth oxalate precipitation device according to claim 1, characterized in that: The rotating assembly (2) includes a fixed cross plate (21), which is fixedly connected to the top of the inner cavity of the sedimentation tank (1). Two feed plates are fixedly connected to the outer surface of the fixed cross plate (21). A drive column (22) is rotatably connected to the bottom of the fixed cross plate (21). A connecting rod (23) is fixedly connected to the lower surface of the fixed cross plate (21). A rotating ring (24) is fixedly connected to the outer surface of the drive column (22). The lower surface of the rotating ring (24) is arranged in a circular array. A telescopic rod 1 (25) is fixedly connected to the fixed block (35), and a telescopic rod 2 (26) is fixedly connected to the upper surface of the fixed block (35). A fixed gear (27) is fixedly connected to the telescopic end of the telescopic rod 2 (26). A limiting plate 1 (28) is fixedly connected to the top of the fixed gear (27), and a limiting plate 2 (29) is fixedly connected to the bottom of the fixed gear (27). A sliding groove (210) is provided on the top of the limiting plate 1 (28) extending to the bottom of the telescopic rod 2 (26). The outer surface of the telescopic rod 2 (26) rotates. A rotating housing (211) is connected to the rotating housing (211). A limiting groove (212) is symmetrically formed at the bottom of the rotating housing (211). Connecting blocks (213) are symmetrically fixed to the top of the inner cavity of the rotating housing (211). Rotating gears (214) are rotatably connected to the ends of the two connecting blocks (213) away from the top of the inner cavity of the rotating housing (211). Rotating rods (215) are fixedly connected to the bottom of the two rotating gears (214). Stirring rods are fixedly connected to the bottom of the two rotating rods (215). 216), connecting frames (217) are symmetrically fixedly connected to both sides of the lower surface of the rotating housing (211). Straight rods (218) are fixedly connected to one end of the two connecting frames (217) away from the rotating housing (211). Scraping blocks (219) are fixedly connected to one end of the two straight rods (218) away from the connecting frames (217). A rotating groove is opened on the upper surface of the rotating housing (211). Limiting rods (220) are symmetrically fixedly connected to the inner surface of the rotating groove of the rotating housing (211).
4. The rare earth oxalate precipitation device according to claim 1, characterized in that: The discharge assembly (3) also includes a fixing frame (31), which is fixedly connected to the bottom of the inner cavity of the sedimentation tank (1) and located below the fixing block (35). The upper surface of the fixing frame (31) is fixedly connected with telescopic springs (32) arranged in a cross array. Each telescopic spring (32) is fixedly connected to a lower pressure plate (33) at one end away from the fixing frame (31). The upper surface of the lower pressure plate (33) is fixedly connected with sealing columns (34) arranged in a circular array.
5. The rare earth oxalate precipitation device according to claim 1, characterized in that: The feeding assembly (4) includes a sliding Z-bar (41) and a sliding vertical bar (42). The sliding Z-bar (41) and the sliding vertical bar (42) are respectively slidably connected to the outer surfaces of the two feeding plates of the fixed cross plate (21). The bottom of the inner cavity of the rare earth ion placement tube (14) is rotatably connected to a rotating column one (43). The outer surface of the rotating column one (43) is fixedly connected to a rotating door one (44). The bottom of the inner cavity of the rare earth ion placement tube (14) is rotatably connected to a rotating column two (45). The outer surface of the rotating column two (45) is fixedly connected to a rotating door two (46).
6. The rare earth oxalate precipitation device according to claim 3, characterized in that: The drive column (22) is driven to be mounted on the built-in drive motor, which is electrically connected to the external controller. The connecting rod (23) is rotatably connected to the inside of the drive column (22). The outer surface of the end of the connecting rod (23) away from the drive column (22) is provided with a bidirectional threaded groove. The end of the telescopic rod (25) away from the rotating ring (24) is fixedly connected to the upper surface of the rotating housing (211). The fixed gear (27) meshes with the rotating gear (214). The rotating gear (214) is rotatably connected between the first limiting plate (28) and the second limiting plate (29). The scraping block (219) is adapted to the inner surface of the sedimentation tank (1). The limiting rod (220) is slidably connected in the bidirectional threaded groove on the outer surface of the connecting rod (23).
7. The rare earth oxalate precipitation device according to claim 4, characterized in that: The outer surface of the fixing block (35) is arranged in a circular array with drainage grooves, and each of the sealing columns (34) seals each drainage groove of the fixing block (35).
8. The rare earth oxalate precipitation device according to claim 5, characterized in that: Both ends of the rotating column one (43) and rotating column two (45) are provided with torsion springs. The top of the sliding Z rod (41) abuts against the lower surface of the rotating door one (44), the bottom of the sliding Z rod (41) abuts against the upper surface of the rotating housing (211), the top of the sliding vertical rod (42) abuts against the outer surface of the rotating door two (46), and the bottom of the sliding vertical rod (42) abuts against the upper surface of the rotating housing (211).