A mixed clarification extraction tank for rare earth separation

Abstract

This invention belongs to the field of rare earth preparation technology, specifically providing a rare earth separation mixing and clarification extraction tank, including a mixing chamber, which is cylindrical in shape. The mixing chamber has an omnidirectional mixing mechanism inside, a counter-current feeding assembly on one side, and a baffle-type clarification mechanism on the other side. This invention provides a rare earth separation mixing and clarification extraction tank capable of omnidirectional mixing of aqueous and organic phases without dead zones. It employs a combination of nested and meshing structures, using a single power source to achieve simultaneous rotation of the stirring blades within the mixing chamber and radial movement of the stirring action, thus improving mass transfer uniformity and avoiding mixing dead zones. U-shaped baffles within the clarification chamber form a baffle-type flow channel, reducing the footprint while increasing the feed flow and preventing short-circuiting and eddies.

Description

Technical Field

[0001] This invention belongs to the field of rare earth preparation technology, specifically referring to a mixed clarification extraction tank for rare earth separation. Background Technology

[0002] The mixing-clarification-extraction tank is a core industrial equipment in the rare earth hydrometallurgy field. Based on the principles of solvent extraction and cascade extraction, it completes a cyclical operation of mixing, mass transfer, and gravity clarification. The core of the mixing-clarification-extraction tank consists of two parts: a mixing chamber and a clarification chamber. The mixing chamber contains a mechanical stirring system that mixes and transfers the raw material liquid and extractant. The mixture then flows into the clarification chamber, where gravity facilitates separation.

[0003] In existing technologies, the mixing and clarification extraction tanks used for rare earth separation still have the following shortcomings: 1. Some mixing chambers have problems with excessive local shear and uneven overall mixing. That is, there is a phenomenon that the area near the blades is well mixed, while the area far from the blades is poorly mixed. There are also mixing dead zones, which leave extractant residue on the walls of the mixing chamber, affecting the separation accuracy. 2. Some clarification chambers are prone to short-circuiting and eddy current phenomena when the mixed liquid flows in; increasing the feed flow also leads to a larger footprint, which increases material loss and reduces separation efficiency. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a rare earth separation mixing and clarification extraction tank capable of omnidirectional mixing of aqueous and organic phases without dead zones. It employs a combination of nested and interlocking structures, achieving simultaneous rotation of the stirring blades within the mixing chamber via a single power source. This, along with the reciprocating stirring along the radius of the mixing chamber, enhances mass transfer uniformity and avoids mixing dead zones. Furthermore, U-shaped baffles within the clarification chamber form a baffled flow channel, reducing floor space while increasing the feed flow and preventing short-circuiting and eddies.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: The present invention provides a mixing and clarification extraction tank for rare earth separation, including a mixing box, the mixing box being cylindrical in shape, an omnidirectional mixing mechanism being provided inside the mixing box, a counter-current feeding assembly being connected to one side of the mixing box, and a baffle clarification mechanism being provided on the other side of the mixing box.

[0006] Furthermore, the omnidirectional mixing mechanism includes a box cover, a rotating frame assembly, and a stirring assembly. The box cover is installed on the upper part of the mixing box. The box cover and the mixing box can be installed by snap-locking or by bolts. The rotating frame assembly is rotatably located on the lower part of the box cover and rotates inside the mixing box. The stirring assembly is located on the rotating frame assembly and has two sets.

[0007] Furthermore, the baffle-type clarification mechanism includes a clarification chamber and a U-shaped baffle. The clarification chamber is connected to one side of the mixing chamber. A receiving channel is provided through the middle of the side of the clarification chamber near the mixing chamber. Vertical plates are symmetrically arranged on both sides of the receiving channel. A receiving ramp is connected to the inner side of the vertical plates. The U-shaped baffle is vertically arranged inside the clarification chamber and covers the end of the receiving channel away from the mixing chamber. The receiving channel and the U-shaped baffle form a baffle-type flow channel in the clarification chamber, increasing the length of the liquid flow channel and avoiding short-circuiting and eddies.

[0008] Preferably, the mixing chamber has a central column at its interior center, and a connecting column is coaxially provided at the upper end of the central column. The upper end of the central column has a first tooth, which is evenly distributed around the outer wall of the connecting column. The upper end of the connecting column has a second tooth evenly distributed around its circumference. The diameter of the connecting column is smaller than the diameter of the central column.

[0009] Furthermore, the rotating frame assembly includes a main power motor, a rotating sleeve, and a support frame. The main power motor is located at the center of the box cover, the rotating sleeve is located at the output end of the main power motor, the rotating sleeve is rotatably located at the lower center of the box cover, and the rotating sleeve is rotatably sleeved on the outside of the central column. The support frame is symmetrically arranged on the outer wall of the rotating sleeve and is U-shaped. The outer side of the support frame is provided with a silicone scraper. The silicone scraper scrapes against the inner wall of the mixing box, and the lower end of the support frame scrapes against the bottom wall of the mixing box to avoid residual extractant on the inner wall of the mixing box.

[0010] Furthermore, the stirring assembly includes a follower rotating column, a rotating block, and stirring blades. The follower rotating column is horizontally rotatably disposed in the middle of the support frame and the rotating sleeve rod. A guide groove is provided on the follower rotating column along its central axis. A follower gear is provided at one end of the follower rotating column that passes through the rotating sleeve rod. The follower gear meshes with the first tooth. The rotating block is slidably sleeved on the follower rotating column, and the inner wall of the rotating block is provided with a protrusion that engages with the guide groove. This allows the rotating block to slide along the axis of the follower rotating column while also rotating with the follower rotating column. The stirring blades are evenly distributed on the outer wall of the rotating block around its circumference. The stirring blades are inclined and have evenly distributed flow holes. Furthermore, the stirring assembly also includes a bidirectional threaded rod and a lever. The bidirectional threaded rod is horizontally rotatably disposed between the support frame and the rotating sleeve rod, and is located above the follower rotating column. The bidirectional threaded rod is a reciprocating screw. A movable gear is provided at one end of the bidirectional threaded rod that passes through the rotating sleeve rod. The movable gear meshes with the second tooth. The lever is vertically disposed on the side of the rotating block near the silicone scraper. One end of the lever is meshed and sleeved on the bidirectional threaded rod, and the other end of the lever is movably sleeved on the follower rotating column. The end of the lever near the follower rotating column is nested and rotatably connected to the rotating block. In use, rotating the sleeve rod causes the support frame to rotate, which in turn agitates the liquid. Simultaneously, driven by the support frame, the follower rotating column and the bidirectional threaded rod rotate around the central column. Since the follower gear meshes with the first tooth and the moving gear meshes with the second tooth, the follower rotating column and the bidirectional threaded rod rotate on their own axes while revolving around the central column. The inner wall of the rotating block has protrusions that engage with guide grooves, causing the follower rotating column to drive the rotating block to rotate. This, in turn, causes the inclined stirring blades to agitate the liquid vertically. The flow holes enhance the shear mass transfer of the liquid while reducing the stress on the stirring blades. The rotational resistance is encountered, and the double-threaded rod rotates, with the upper end of the actuating rod engaging with it. This causes the actuating rod to move linearly back and forth along the axis of the double-threaded rod. Driven by the actuating rod, the rotating block moves linearly back and forth along the axis of the following rotating column while rotating on its own axis. This allows the stirring blades in the cylindrical mixing box to not only revolve around the central axis of the mixing box to ensure large-scale mixing, but also to rotate vertically to ensure local shearing and mass transfer. At the same time, it can move linearly back and forth along the radius of the mixing box to improve mass transfer uniformity and avoid mixing dead zones.

[0011] Preferably, a transition block connects the mixing tank and the clarification tank. A liquid passage channel runs through the middle of the transition block, connecting the mixing tank and the receiving channel. Liquid passage baffles are arranged in a vertical array on the inner sidewall of the liquid passage channel, forming an overflow channel between the arrayed baffles. A baffle plate slides in the overflow channel. An electric telescopic column is arranged in a vertical array on the sidewall of the transition block. The output end of the electric telescopic column is connected to the baffle plate. The electric telescopic column controls the baffle plates of different heights to slide into the overflow channel, thereby adjusting the overflow height of the mixing tank. When the height of the mixed liquid in the mixing tank reaches the height of the opened baffle plate, the liquid flows into the clarification tank through the liquid passage channel. The mixing time of the liquid is adjusted when the liquid inlet flow rate of the mixing tank is fixed.

[0012] Furthermore, the counter-flush feeding assembly includes a spiral tube and a counter-flush chamber. The spiral tube is vertically disposed on one side of the mixing chamber, and the counter-flush chamber is connected to the upper end of the spiral tube. The lower end of the spiral tube is connected to the lower part of the mixing chamber. The two sides of the counter-flush chamber are respectively connected to an aqueous phase inlet and an organic phase inlet. The aqueous phase and the organic phase move relative to each other in the counter-flush chamber and are pre-mixed through the spiral channel of the spiral tube to reduce the stirring load.

[0013] Furthermore, the clarification tank is provided with an aqueous phase outlet and an organic phase outlet on both sides of the end away from the mixing tank, respectively. The aqueous phase outlet is located below the organic phase outlet. A telescopic overflow plate is connected to the inner side of the clarification tank near the organic phase outlet. The telescopic overflow plate is a multi-segment telescopic plate. An adjusting screw is rotatably provided on the side wall of the clarification tank. The adjusting screw is located between the telescopic overflow plate and the inner wall of the clarification tank. The upper end of the telescopic overflow plate is engaged with the adjusting screw.

[0014] The beneficial effects achieved by the present invention using the above structure are as follows: 1. This invention provides a mixing and clarification extraction tank for rare earth separation, which adopts a combination of nested and meshing structures. The omnidirectional mixing mechanism, powered by a single power source, enables the stirring blades to not only revolve around the central axis of the cylindrical mixing chamber to ensure wide-range mixing, but also rotate vertically to ensure local shearing and mass transfer. Simultaneously, it can reciprocate linearly along the radius of the mixing chamber to improve mass transfer uniformity and avoid mixing dead zones. In addition, the support frame and silicone scraper can scrape off the residual extractant on the inner wall of the mixing chamber in real time to ensure separation accuracy. Furthermore, the use of inclined stirring blades combined with flow holes reduces stirring energy consumption. 2. A U-shaped baffle is used to form a baffle-type flow channel in the clarification tank, which reduces the floor space while increasing the flow of liquid and avoids short-circuiting and eddies. At the same time, a receiving slope is used to make the tiny droplets collide and grow larger by utilizing the coalescence effect, thus accelerating the stratification. 3. Adopting the principle of pre-action, the counter-flush feeding assembly, through the counter-flush chamber connecting the aqueous phase inlet and the organic phase inlet and the spiral tube, allows the aqueous phase and organic phase to be pre-mixed before entering the mixing chamber, reducing the stirring load; 4. The baffles in the array can adjust the overflow height in the mixing tank as needed, thereby adjusting the mixing time of the liquid when the liquid inlet flow rate in the mixing tank is fixed. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a mixing and clarification extraction tank for rare earth separation provided by the present invention; Figure 2 A top view of a mixed clarification extraction tank for rare earth separation provided by the present invention; Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at point AA; Figure 4 This is a schematic diagram of the combined structure of the counter-feed assembly, the mixing chamber, and the transition block. Figure 5 for Figure 3 A magnified schematic diagram of the local structure at point B; Figure 6 This is a schematic diagram of an omnidirectional mixing mechanism; Figure 7 This is a right view of an omnidirectional mixing mechanism; Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure at point CC; Figure 9 for Figure 8 A magnified schematic diagram of the local structure at point D; Figure 10 This is a schematic diagram of a baffle-type clarification mechanism.

[0016] The components include: 1. Mixing box; 2. Omnidirectional mixing mechanism; 3. Baffle-type clarification mechanism; 4. Counter-current feeding assembly; 5. Central column; 6. First tooth; 7. Connecting column; 8. Second tooth; 9. Transition block; 10. Liquid passage tank; 11. Liquid passage baffle; 12. Overflow tank; 13. Box cover; 14. Rotating frame assembly; 15. Stirring assembly; 16. Main power motor; 17. Rotating sleeve; 18. Support frame; 19. Silicone scraper; 20. Follower rotating column; 21. Follower gear. 22. Rotating block, 23. Stirring blade, 24. Flow hole, 25. Bidirectional threaded rod, 26. Moving gear, 27. Actuating rod, 28. Spiral tube, 29. Counterflow chamber, 30. Organic phase inlet, 31. Aqueous phase inlet, 32. Clarifying tank, 33. Aqueous phase outlet, 34. Organic phase outlet, 35. Receiving channel, 36. Receiving ramp, 37. U-shaped baffle, 38. Adjusting screw, 39. Telescopic overflow plate, 40. Electric telescopic column, 41. Baffle plate, 42. Guide groove. Detailed Implementation

[0017] The technical solution of the present invention will be further described in detail below with reference to specific implementations. The parts of the technical features or connection relationships described in the present invention that are not described in detail are all existing technologies.

[0018] The present invention will be further described in detail below with reference to the accompanying drawings.

[0019] like Figures 1-10As shown, the present invention provides a mixing and clarification extraction tank for rare earth separation, including a mixing chamber 1, which is cylindrical in shape. An omnidirectional mixing mechanism 2 is provided inside the mixing chamber 1. A counter-current feeding assembly 4 is connected to one side of the mixing chamber 1, and a baffle clarification mechanism 3 is provided on the other side of the mixing chamber 1.

[0020] The counter-feed assembly 4 includes a spiral tube 28, which is vertically disposed on one side of the mixing chamber 1. The counter-feeding cavity 29 is connected to the upper end of the spiral tube 28, and the lower end of the spiral tube 28 is connected to the lower part of the mixing chamber 1. The two sides of the counter-feeding cavity 29 are respectively connected to an aqueous phase inlet 31 and an organic phase inlet 30.

[0021] The mixing box 1 has a central column 5 at its center, a connecting column 7 coaxially at the upper end of the central column 5, a first tooth 6 at the upper end of the central column 5, the first tooth 6 being evenly distributed around the outer wall of the connecting column 7, and a second tooth 8 being evenly distributed around the upper end of the connecting column 7. The baffle-type clarification mechanism 3 includes a clarification chamber 32, which is connected to one side of the mixing chamber 1. A receiving channel 35 is provided through the middle of the side of the clarification chamber 32 closest to the mixing chamber 1. Vertical plates are symmetrically arranged on both sides of the receiving channel 35, and receiving ramps 36 are connected to the inner sides of the vertical plates. A U-shaped baffle 37 is vertically arranged inside the clarification chamber 32, covering the end of the receiving channel 35 away from the mixing chamber 1. The receiving channel 35 and the U-shaped baffle 37 form a baffle-type flow channel within the clarification chamber 32, increasing the length of the liquid flow channel and preventing short-circuiting and eddies. A transition channel connects the mixing chamber 1 and the clarification chamber 32. The middle of the connecting block 9 is provided with a liquid passage 10, which connects the mixing box 1 and the receiving channel 35. Liquid passage baffles 11 are arranged vertically on the inner side wall of the liquid passage 10, and an overflow channel 12 is formed between the arrayed liquid passage baffles 11. A baffle 41 is slidably provided in the overflow channel 12. The side wall of the connecting block 9 is arranged vertically with an electric telescopic column 40. The output end of the electric telescopic column 40 is connected to the baffle 41. The baffle 41 arranged in the array can adjust the overflow height in the mixing box 1 as needed, thereby adjusting the mixing time of the liquid when the liquid inlet flow rate of the mixing box 1 is fixed.

[0022] The omnidirectional mixing mechanism 2 includes a box cover 13, which is installed on the upper part of the mixing box 1. A rotating frame assembly 14 is rotatably provided on the lower part of the box cover 13. The rotating frame assembly 14 rotates inside the mixing box 1. A stirring assembly 15 is provided on the rotating frame assembly 14. The stirring assembly 15 is provided in two sets. The rotating frame assembly 14 includes a main power motor 16, which is located at the center of the box cover 13. The output end of the main power motor 16 is provided with a rotating sleeve 17, which is rotatably located at the lower center of the box cover 13. The rotating sleeve 17 is rotatably sleeved on the outside of the central column 5. Support frames 18 are symmetrically provided on the outer wall of the rotating sleeve 17. The support frames 18 are arranged in a U-shape. A silicone scraper 19 is provided on the outer side of the support frame 18. The silicone scraper 19 scrapes the inner wall of the mixing box 1, and the lower end of the support frame 18 scrapes the bottom wall of the mixing box 1, thereby scraping away the residual extractant on the inner wall of the mixing box 1 in real time.

[0023] The stirring assembly 15 includes a follower rotating column 20 and a bidirectional threaded rod 25. The follower rotating column 20 is horizontally rotatable at the middle of the support frame 18 and the rotating sleeve rod 17. A guide groove 42 is provided on the follower rotating column 20 along its central axis. A follower gear 21 is provided at one end of the follower rotating column 20 that passes through the rotating sleeve rod 17. The follower gear 21 meshes with the first tooth 6. A rotating block 22 is slidably sleeved on the follower rotating column 20. The inner wall of the rotating block 22 has a protrusion that engages with the guide groove 42, thereby allowing the rotating block 22 to slide along its central axis on the follower rotating column 20 and rotate with the follower rotating column 20. Stirring blades 23 are evenly distributed around the outer wall of the rotating block 22. The stirring blades 23 are inclined and have evenly distributed flow holes. 24; The bidirectional threaded rod 25 is horizontally rotatably disposed between the support frame 18 and the rotating sleeve rod 17. The bidirectional threaded rod 25 is disposed above the follower rotating column 20. One end of the bidirectional threaded rod 25 that passes through the rotating sleeve rod 17 is provided with a moving gear 26. The moving gear 26 meshes with the second tooth 8. The rotating block 22 is vertically provided with a toggle rod 27 on the side near the silicone scraper 19. One end of the toggle rod 27 is meshed and sleeved on the bidirectional threaded rod 25. The other end of the toggle rod 27 is movably sleeved on the follower rotating column 20. The end of the toggle rod 27 near the follower rotating column 20 is nested and rotatably connected to the rotating block 22, so that the toggle rod 27 can drive the rotating block 22 to slide back and forth on the follower rotating column 20 without affecting the rotation of the rotating block 22.

[0024] The clarification tank 32 is connected to an aqueous phase outlet 33 and an organic phase outlet 34 on both sides of the end away from the mixing tank 1. The aqueous phase outlet 33 is located below the organic phase outlet 34. A telescopic overflow plate 39 is connected to the inner side of the clarification tank 32 near the organic phase outlet 34. The telescopic overflow plate 39 is a multi-segment telescopic plate. Both ends of the telescopic overflow plate 39 are slidably sealed to the inner wall of the mixing tank 1. An adjusting screw 38 is rotatably provided on the side wall of the clarification tank 32. The adjusting screw 38 is located between the telescopic overflow plate 39 and the inner wall of the clarification tank 32. The upper end of the telescopic overflow plate 39 is engaged with the adjusting screw 38. By turning the adjusting screw 38, the height of the telescopic overflow plate 39 can be adjusted, thereby adjusting the overflow height.

[0025] Working principle and workflow: In practical use, firstly, insert the rotating sleeve 17 onto the central column 5, install the box cover 13, so that the follower gear 21 meshes with the first tooth 6, and the moving gear 26 meshes with the second tooth 8; then, the aqueous solution containing rare earth ions, i.e., the aqueous phase, enters the flushing chamber 29 through the aqueous phase inlet 31, and the organic solution containing the extractant, i.e., the organic phase, enters the flushing chamber 29 through the organic phase inlet 30. The aqueous phase and the organic phase move relative to each other in the flushing chamber 29 and are pre-mixed through the spiral channel of the spiral tube 28 to reduce the stirring load; the pre-mixed liquid enters the mixing box 1, and is stirred by the omnidirectional mixing mechanism 2 to increase the contact area between the aqueous phase and the organic phase.

[0026] The main motor 16 starts, driving the rotating sleeve 17 to rotate, which in turn drives the support frame 18 to rotate. Simultaneously, the silicone scraper 19 and the lower end of the support frame 18 scrape the inner and bottom walls of the mixing chamber 1 in real time, preventing residual extractant from remaining on the inner wall of the mixing chamber 1. When the silicone scraper 19 passes the liquid channel 10, it adaptively undergoes elastic deformation, thereby scraping off residual extractant from the baffle plate 41. The support frame 18 rotates to agitate the liquid. At the same time, driven by the support frame 18, the follower rotating column 20 and the bidirectional threaded rod 25 rotate around the central column 5. Since the follower gear 21 meshes with the first tooth 6 and the moving gear 26 meshes with the second tooth 8, the follower rotating column 20 and the bidirectional threaded rod 25 rotate on their own axis while revolving around the central column 5. The inner wall of the rotating block 22 is provided with protrusions and guide grooves 42. The rotating block 22 is driven by the rotating column 20 to rotate, which in turn causes the inclined stirring blade 23 to stir the liquid in the vertical direction. The flow hole 24 enhances the shear mass transfer of the liquid and reduces the rotational resistance of the stirring blade 23. The bidirectional threaded rod 25 rotates and the upper end of the actuating rod 27 engages with it, causing the actuating rod 27 to move linearly back and forth along the axis of the bidirectional threaded rod 25. Driven by the actuating rod 27, the rotating block 22 moves linearly back and forth along the axis of the rotating column 20 while rotating with the rotating column 20. This allows the stirring blade 23 to not only revolve around the central axis of the cylindrical mixing box 1 to ensure large-scale mixing, but also to rotate vertically to ensure local shear and mass transfer. At the same time, it can move back and forth linearly along the radius of the mixing box 1 to improve the uniformity of mass transfer and avoid the formation of mixing dead zones.

[0027] The liquid flow rate into the mixing tank 1 is fixed by the counter-feeding assembly 4. The liquid is mixed by the omnidirectional mixing mechanism 2. Then, according to the required mixing time, the baffles 41 at different heights are controlled by the electric telescopic column 40 to slide into the overflow trough 12, thereby adjusting the overflow height of the mixing tank 1. When the height of the mixed liquid in the mixing tank 1 reaches the height of the opened baffles 41, the liquid flows into the receiving channel 35 of the clarifying tank 32 through the liquid passage 10, and the liquid flows out through the receiving ramp 36. The liquid flows to the U-shaped baffle 37, where the coalescence effect causes the tiny droplets to collide and grow larger, accelerating the stratification. The U-shaped baffle 37 forms a baffle-type flow channel, increasing the flow of the liquid and avoiding flow field disturbance. The liquid settles and stratifies in the clarification tank 32 by gravity. The lower aqueous phase then flows out through the aqueous phase outlet 33. According to the height of the separated liquid level, the height of the telescopic overflow plate 39 can be adjusted by turning the adjusting screw 38, thereby adjusting the overflow height of the organic phase. The upper organic phase flows out through the organic phase outlet 34.

[0028] It is worth noting that the installation methods of the cover 13 and the mixing box 1, such as snap-locking or bolt installation, and the use of the bidirectional threaded rod 25, are all existing technologies and will not be elaborated here.

[0029] The above is the overall workflow of this invention. Simply repeat this process the next time you use it.

[0030] It should be noted that, in this document, 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 process, method, article, or apparatus.

[0031] 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.

[0032] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A mixed-settling extraction tank for rare earth separation, comprising a mixing tank (1), characterized in that: The mixing chamber (1) is equipped with an omnidirectional mixing mechanism (2) inside, and a counter-feeding assembly (4) is connected to one side of the mixing chamber (1). A baffle clarification mechanism (3) is provided on the other side of the mixing chamber (1). The omnidirectional mixing mechanism (2) includes a box cover (13), a rotating frame assembly (14), and a stirring assembly (15). The box cover (13) is installed on the upper part of the mixing box (1). The rotating frame assembly (14) is rotatably located on the lower part of the box cover (13). The stirring assembly (15) is located on the rotating frame assembly (14) and has two sets. The baffle-type clarification mechanism (3) includes a clarification chamber (32) and a U-shaped baffle (37). The clarification chamber (32) is connected to one side of the mixing chamber (1). A receiving channel (35) is provided through the middle of the side of the clarification chamber (32) close to the mixing chamber (1). Vertical plates are symmetrically provided on both sides of the receiving channel (35). A receiving ramp (36) is connected to the inner side of the vertical plate. The U-shaped baffle (37) is vertically provided inside the clarification chamber (32). The U-shaped baffle (37) covers the end of the receiving channel (35) away from the mixing chamber (1).

2. The mixed-settling extraction tank for rare earth separation according to claim 1, characterized in that: The mixing box (1) has a central column (5) at its center. The upper end of the central column (5) is coaxially provided with a connecting column (7). The upper end of the central column (5) is provided with a first tooth (6). The first tooth (6) is evenly distributed around the outer wall of the connecting column (7). The upper end of the connecting column (7) is evenly distributed with a second tooth (8).

3. The mixed-settling extraction tank for rare earth separation according to claim 2, characterized in that: The rotating frame assembly (14) includes a main power motor (16), a rotating sleeve (17), and a support frame (18). The main power motor (16) is located at the center of the box cover (13). The rotating sleeve (17) is located at the output end of the main power motor (16). The rotating sleeve (17) is rotatably located at the lower center of the box cover (13). The rotating sleeve (17) is rotatably sleeved on the outside of the central column (5). The support frame (18) is symmetrically located on the outer wall of the rotating sleeve (17). The support frame (18) is arranged in a U-shape. The outer side of the support frame (18) is provided with a silicone scraper (19).

4. The mixed-settling extraction tank for rare earth separation according to claim 3, characterized in that: The stirring assembly (15) includes a follower rotating column (20), a rotating block (22), and a stirring blade (23). The follower rotating column (20) is horizontally rotatably disposed in the middle of the support frame (18) and the rotating sleeve (17). A guide groove (42) is provided on the follower rotating column (20) along its central axis. A follower gear (21) is provided at one end of the follower rotating column (20) that passes through the rotating sleeve (17). The follower gear (21) meshes with the first tooth (6). The rotating block (22) is slidably sleeved on the follower rotating column (20), and the inner wall of the rotating block (22) is provided with a protrusion that engages with the guide groove (42). The stirring blade (23) is evenly distributed on the outer wall of the rotating block (22) around its circumference. The stirring blade (23) is inclined and has flow holes (24) evenly distributed through it.

5. The rare earth separation mixing and clarification extraction tank according to claim 4, characterized in that: The stirring assembly (15) further includes a bidirectional threaded rod (25) and a lever (27). The bidirectional threaded rod (25) is horizontally rotatably disposed between the support frame (18) and the rotating sleeve (17). The bidirectional threaded rod (25) is disposed above the follower rotating column (20). One end of the bidirectional threaded rod (25) that passes through the rotating sleeve (17) is provided with a moving gear (26). The moving gear (26) meshes with the second tooth (8). The lever (27) is vertically disposed on the side of the rotating block (22) near the silicone scraper (19). One end of the lever (27) is meshed and sleeved on the bidirectional threaded rod (25). The other end of the lever (27) is movably sleeved on the follower rotating column (20). The end of the lever (27) near the follower rotating column (20) is nested and rotatably connected to the rotating block (22).

6. The rare earth separation mixing and clarification extraction tank according to claim 5, characterized in that: A transition block (9) connects the mixing tank (1) and the clarification tank (32). A liquid passage channel (10) is provided through the middle of the transition block (9). The liquid passage channel (10) connects the mixing tank (1) and the receiving channel (35). Liquid passage baffles (11) are arranged in an array along the vertical direction on the inner side wall of the liquid passage channel (10). An overflow channel (12) is formed between the arrayed liquid passage baffles (11). A baffle plate (41) is slidably provided in the overflow channel (12). An electric telescopic column (40) is arranged in an array along the vertical direction on the side wall of the transition block (9). The output end of the electric telescopic column (40) is connected to the baffle plate (41).

7. The rare earth separation mixing and clarification extraction tank according to claim 6, characterized in that: The counter-feed assembly (4) includes a spiral tube (28) and a counter-feeding chamber (29). The spiral tube (28) is vertically disposed on one side of the mixing chamber (1). The counter-feeding chamber (29) is connected to the upper end of the spiral tube (28). The lower end of the spiral tube (28) is connected to the lower part of the mixing chamber (1). The two sides of the counter-feeding chamber (29) are respectively connected to an aqueous phase inlet (31) and an organic phase inlet (30).

8. A rare earth separation mixing and clarification extraction tank according to claim 7, characterized in that: The clarification tank (32) is connected to an aqueous phase outlet (33) and an organic phase outlet (34) on both sides of the end away from the mixing tank (1). The aqueous phase outlet (33) is located below the organic phase outlet (34). The inner side of the clarification tank (32) near the organic phase outlet (34) is connected to a telescopic overflow plate (39). An adjusting screw (38) is rotatably provided on the side wall of the clarification tank (32). The adjusting screw (38) is located between the telescopic overflow plate (39) and the inner wall of the clarification tank (32). The upper end of the telescopic overflow plate (39) is engaged and sleeved on the adjusting screw (38).

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