A rare earth compound aluminum removal device

Abstract

This invention relates to the technical field of high-purity rare earth compound manufacturing, specifically to a device for removing aluminum from rare earth compounds. The device includes: multiple extraction tanks arranged sequentially on a base, each tank connected to an aluminum slurry discharge pipe for discharging aluminum-containing wastewater and a rare earth discharge pipe for discharging purified rare earth solution; an aluminum slurry collection tank fixed to the outside of a rare earth solution collection tank for centralized collection of aluminum-containing wastewater; a sampling mechanism slidably mounted on the top edge of the aluminum slurry collection tank, connected to a drive source, and capable of reciprocating along the length of the collection tank to automatically sample aluminum-containing wastewater at different locations; and an integrated spectrophotometer detection unit on the sampling mechanism for detecting the aluminum content of the water sample. This invention solves the problem of requiring manual operation when detecting the aluminum content of aluminum-containing wastewater.

Description

Technical Field

[0001] This invention relates to the technical field of manufacturing high-purity rare earth compounds, and specifically to a device for removing aluminum from rare earth compounds. Background Technology

[0002] Rare earths are a key strategic resource for modern high-tech industries, and the large-scale preparation of high-purity rare earth compounds has become a core link in the high-end development of my country's rare earth industry chain. In the high-purity rare earth extraction and separation process, the efficient removal of aluminum impurities is one of the core steps determining the purity of the final product. A typical rare earth extraction aluminum removal process usually includes steps such as organic phase saponification preparation, rare earth feed solution extraction and separation, deep washing of the loaded organic phase, selective aluminum back-extraction, and aluminum-containing wastewater treatment and closed-loop recycling. The aluminum-containing wastewater generated in the back-extraction process needs to be treated and returned to the process system for recycling; its water quality directly affects the washing efficiency, aluminum back-extraction selectivity, and the ppm-level impurity content of the final high-purity rare earth oxide product.

[0003] To ensure that the recycled water meets the standards, key indicators such as aluminum content in the treated aluminum-containing wastewater need to be tested. However, current technologies generally use manual sampling followed by laboratory ICP-OES analysis, which suffers from long testing cycles, delayed data feedback, and an inability to monitor the wastewater treatment effect in real time. When the aluminum content of the treated wastewater exceeds the standard, it is still recycled, leading to incomplete washing of the loaded organic phase, a reduced aluminum back-extraction separation coefficient, and excessively high cumulative aluminum load in the organic phase. This, in turn, causes emulsification in the saponification extraction system and imbalance in the cascade extraction tank, severely damaging the stability of the entire extraction system and affecting the batch consistency and purity of high-purity rare earth products. Furthermore, manual sampling suffers from high labor intensity, susceptibility to human error, and difficulty in achieving continuous online monitoring, failing to meet the needs of large-scale industrial continuous production in the high-purity rare earth compound manufacturing industry. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a rare earth compound aluminum removal device, which solves the problem that manual operation is still required when detecting aluminum content in aluminum-containing wastewater.

[0005] This invention discloses a rare earth compound aluminum removal device, comprising a base, multiple extraction tanks arranged in parallel along the length of the base, each extraction tank forming an independent extraction reaction chamber, and each extraction tank connected to an aluminum slurry discharge pipe for discharging aluminum-containing wastewater and a rare earth discharge pipe for discharging purified rare earth slurry; an aluminum slurry collection tank is a long strip-shaped trough fixed to the outside of the rare earth liquid collection tank along the length of the base for centralized collection of aluminum-containing wastewater; a sampling mechanism is slidably mounted on the top edge of the aluminum slurry collection tank and driven by a drive source on the aluminum slurry collection tank, and can slide back and forth along the length of the aluminum slurry collection tank to automatically sample aluminum-containing wastewater at different points; a spectrophotometer is integrated on the sampling mechanism for detecting the aluminum content of the water sample.

[0006] The optimized rare earth liquid collection tank is fixed on the base and connected to the rare earth discharge pipe of all extraction tanks for centralized collection of rare earth liquid; the aluminum water discharge pipe spans the space above the rare earth liquid collection tank, and the end outlet is suspended above the aluminum water collection tank.

[0007] Specifically, the drive source includes a servo motor, which is fixed at the top edge of one end of the aluminum molten metal collection box along its length. The output shaft is coaxially fixed to one end of the threaded rod and is used to output rotational power. The threaded rod extends along the length of the aluminum molten metal collection box and is rotatably mounted on the end walls of the aluminum molten metal collection box at both ends, allowing it to rotate around its own axis. The sliding seat of the sampling mechanism facing the threaded rod forms a helical transmission engagement with the threaded rod.

[0008] Specifically, the sampling mechanism includes a sliding seat, which is a vertical frame-shaped structure that slides over the top edge of the aluminum water collection tank. A spectrophotometer is fixedly installed on the top of the sliding seat to detect the aluminum content of the water sample. An operating chamber is set at the bottom of the spectrophotometer, and a detection chamber is mounted inside the operating chamber via a horizontal rotating shaft. The drive unit is linked with the detection chamber to drive the detection chamber to swing around the shaft and switch its working position. The lower end of the detection chamber is sealed and connected to a suction nozzle, and the upper end is sealed and connected to a liquid outlet pipe, serving as a sample receiving chamber for spectrophotometric detection. The spectrophotometer has a built-in pump body, which is connected to the flow path of the detection chamber to provide power for liquid suction and discharge.

[0009] More specifically, the water distribution unit includes a distribution drive motor, which is fixedly mounted on the upper side wall of the sliding seat. The output shaft extends horizontally, and the end of the shaft is coaxially fixed to the drive pulley. A rotating screw is rotatably supported on the lower side wall of the sliding seat, and one end of the rotating screw is coaxially fixed to the driven pulley. The driven pulley and the drive pulley are connected by a transmission belt. The upper part of the distribution frame is provided with an internal thread hole that matches the external thread of the rotating screw, forming a helical transmission engagement with the rotating screw. A guide groove is provided at the bottom of the sliding seat, and the bottom of the distribution frame slides and adapts to the guide groove.

[0010] The optimized design features a grid structure at the bottom of the uniformly distributed frame, which extends below the liquid surface to agitate the water.

[0011] The optimized design includes a guide channel installed on the sliding seat on one side of the outlet of the sampling mechanism's liquid pipe. The guide channel is fixedly connected to the sliding seat via a fixing frame. The guide channel is arranged at an angle, so that when the detection chamber is flipped to the horizontal reset position, the outlet of the sampling mechanism's liquid pipe matches the receiving position of the guide channel. A shut-off valve is installed on the outlet of the sampling mechanism's liquid pipe to control the opening and closing of the waste liquid discharge passage.

[0012] The optimized system features a collection box connected to the uniform distribution frame via connectors. The collection box can be moved along with the uniform distribution frame to the area below the suction nozzle, where aluminum-containing wastewater from multiple locations is collected and brought to the sampling area.

[0013] The optimized design features a long, narrow channel at the bottom of the fishing tank for allowing aluminum-containing wastewater to enter and exit the tank.

[0014] The beneficial effects of this invention are as follows:

[0015] This invention solves the problem of manual operation required for aluminum content detection in aluminum-containing wastewater. The invention uses a transmission structure to automatically move and fix the sampling mechanism at a fixed point, replacing manual sampling. It enables continuous online detection, real-time monitoring of aluminum removal efficiency, ensures the quality of recycled water, reduces labor intensity, and improves detection efficiency. Before sampling, the invention uses a water distribution unit to homogenize the water around the sampling point, eliminating local concentration deviations and ensuring reliable detection data. The spectrophotometer moves synchronously with the mechanism, automatically completing the entire process of sampling, detection, and wastewater recirculation, resulting in a seamless and efficient detection process. The pipeline layout of this invention effectively reduces the floor space required, adapting to the needs of arrayed production layouts in workshops. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the rare earth compound aluminum removal device of the present invention.

[0017] Figure 2 This is a partial structural schematic diagram of the rare earth compound aluminum removal device of the present invention.

[0018] Figure 3 This is a schematic diagram of the assembly structure of the sampling mechanism of the present invention.

[0019] Figure 4 This is a three-dimensional structural diagram of the sampling mechanism of the present invention.

[0020] Figure 5 This is a schematic diagram of the assembly structure of the guide channel of the present invention.

[0021] Figure 6 This is a schematic diagram of the assembly structure of the novel drive unit of the present invention.

[0022] Figure 7 This is a schematic diagram of the installation structure of the fishing box of the present invention.

[0023] Figure 8 This is a three-dimensional structural diagram of the fishing box of the present invention.

[0024] Figure 9 This is a schematic diagram of the assembly structure of the improved fishing box of the present invention.

[0025] Figure 10 This is a three-dimensional structural diagram of the improved fishing box of the present invention.

[0026] Figure 11 This is a diagram showing the first usage state of the improved fishing box of the present invention.

[0027] Figure 12 This is a diagram showing the second usage state of the improved fishing box of the present invention.

[0028] In the diagram, 1. Base; 2. Extraction tank; 3. Aluminum molten metal discharge pipe; 4. Rare earth discharge pipe; 5. Rare earth liquid collection tank; 6. Aluminum molten metal collection tank; 7. Threaded rod; 8. Sliding seat; 9. Uniformly distributed drive motor; 10. Uniformly distributed frame; 11. Rotary lead screw; 12. Conveyor belt; 13. Spectrophotometer; 14. Operating chamber; 15. Detection chamber; 16. Suction nozzle; 17. Liquid outlet pipe; 18. Guide channel; 19. Shut-off valve; 20. Transmission gear; 21. Transmission gear plate; 22. Support arm; 23. Connecting piece; 24. Vertical slide rail; 25. Cylindrical bearing; 26. Roller; 27. Connecting rod; 28. Fishing box; 29. ​​L-shaped channel; 30. Main wheel; 31. Driven wheel; 32. Carrier plate. Detailed Implementation

[0029] To clearly understand the technical solution of this application, the following will describe in detail a rare earth compound aluminum removal device provided by this application with reference to specific embodiments and accompanying drawings.

[0030] Example 1: This example provides a rare earth compound aluminum removal device, referencing... Figures 1 to 2 , Figure 1 The diagram shown is a schematic representation of the overall structure of the rare earth compound aluminum removal device. Figure 2The diagram shows a partial structural schematic of a rare earth compound aluminum removal device. As can be seen, the device includes an extraction unit, with a base 1 serving as the supporting structure. The base 1 is an integral platform structure. Multiple extraction tanks 2 are arranged side-by-side along the length of the base 1 and fixedly installed on one side of the base 1. Each extraction tank 2 forms an independent extraction reaction chamber. A process control component is installed on the top of the tank. The sidewall facing the collection tank is connected to an aluminum slurry discharge pipe 3 and a rare earth discharge pipe 4, which are used to discharge aluminum-containing wastewater and purified rare earth liquid, respectively. A rare earth liquid collection tank 5 is fixedly installed on the base 1, located between the extraction tanks 2 and the aluminum slurry collection tank 6. All rare earth discharge pipes 4 from the extraction tanks 2 are connected to the internal chamber of the rare earth liquid collection tank 5. The rare earth liquid produced by each extraction tank 2 flows into the rare earth liquid collection tank 5 through the corresponding rare earth discharge pipe 4, achieving centralized collection and subsequent output of the rare earth product liquid. The aluminum molten metal collection tank 6 is a long, narrow tank structure, fixedly installed on the outside of the rare earth liquid collection tank 5 along the length of the base 1. Its extension length is adapted to the total arrangement length of the multiple extraction tanks 2, covering the corresponding positions of all extraction tanks 2, and is used to collect the aluminum-containing wastewater discharged from all extraction tanks 2. The aluminum molten metal discharge pipe 3 corresponding to each extraction tank 2 extends from the side wall of the tank towards the aluminum molten metal collection tank 6. The entire pipe spans the space above the rare earth liquid collection tank 5, and the discharge port at the end is suspended above the tank of the aluminum molten metal collection tank 6. The aluminum-containing wastewater generated in the extraction tank 2 is transported out through the aluminum molten metal discharge pipe 3 and then directly discharged into the aluminum molten metal collection tank 6 for centralized storage. The aluminum molten discharge pipe 3 is arranged to span the rare earth liquid collection box 5. The reason is that within the limited installation area of ​​the base 1, the rare earth liquid collection box 5 and the aluminum molten collection box 6 are arranged in a horizontal sequence, and the aluminum molten conveying pipeline is laid across the space above. This does not require additional horizontal installation space, which can effectively reduce the overall footprint of the equipment, making the equipment structure more compact and adapting to the multi-row array production layout requirements of the extraction workshop.

[0031] The sampling mechanism is slidably mounted on the top edge of one side of the aluminum water collection tank 6 along its length. The sampling mechanism is connected to an external drive source and can slide back and forth along the length of the aluminum water collection tank 6 under the drive of the drive source, moving sequentially to the aluminum-containing wastewater discharge position corresponding to different extraction tanks 2. It automatically samples the aluminum-containing wastewater in the aluminum water collection tank 6, replacing the traditional manual sampling operation, so as to realize the online continuous detection of aluminum content index, monitor the treatment effect of aluminum-containing wastewater in real time, and ensure that the quality of recycled water meets the standards.

[0032] For details, please refer to [link / reference]. Figure 1As shown in the figure, the aforementioned drive source includes a threaded rod 7 and a servo motor. The servo motor is a commercially available standard component and is not shown in the figure. The servo motor body is fixedly mounted on the top edge of one end of the aluminum molten metal collection tank 6 along its length. Its output shaft is coaxially fixed to one end of the threaded rod 7, used to output rotational power to the threaded rod 7. The threaded rod 7 is generally long and rod-shaped, with continuous external threads machined on its outer surface. It extends along the length of the aluminum molten metal collection tank 6 and is located on the upper edge of the side wall of the aluminum molten metal collection tank 6 opposite to the extraction tank 2. The axial direction of the threaded rod 7 is parallel to the length of the aluminum molten metal collection tank 6. The two ends of the threaded rod 7 are rotatably mounted on the two end walls of the aluminum molten metal collection tank 6 through bearing supports, allowing the threaded rod 7 to rotate freely relative to the aluminum molten metal collection tank 6 around its own axis while maintaining a fixed axial position. A sliding seat 8 is fixedly installed on the side of the sampling mechanism facing the threaded rod 7. The sliding seat 8 has an internal threaded hole that matches the external thread of the threaded rod 7. The threaded rod 7 passes through the internal threaded hole and forms a helical transmission engagement with the sliding seat 8. When the servo motor drives the threaded rod 7 to rotate forward or backward, the rotational motion of the threaded rod 7 is converted into the linear motion of the sliding seat 8 through the meshing transmission of the threaded pair. This, in turn, drives the entire sampling mechanism to reciprocate linearly along the length of the aluminum water collection tank 6, allowing the sampling mechanism to move precisely to the aluminum-containing wastewater discharge position corresponding to any set of extraction tanks 2. This allows for fixed-point sampling of the water in the aluminum water collection tank 6, replacing manual relocation sampling operations and realizing fully automated online sampling and testing.

[0033] For details, please refer to Figures 3 to 4 ,in, Figure 3 The diagram shown is a schematic of the assembly structure of the sampling mechanism, while Figure 4 The diagram shows a three-dimensional structural schematic of the sampling mechanism. As can be seen, the sampling mechanism includes a sliding base 8, which is a vertical frame structure. The top of the sliding base slidably overlaps the top edge of the aluminum water collection tank 6, forming the mounting carrier and sliding base of the entire sampling mechanism. A water distribution unit is assembled within the lower frame space of the sliding base 8. The water distribution unit consists of a distribution drive motor 9, a conveyor belt 12, a rotating lead screw 11, and a distribution frame 10. It is used to homogenize the local water before sampling, avoiding local concentration deviations that could affect detection accuracy. A more detailed connection structure of the water distribution unit is shown below.

[0034] The body of the uniformly distributed drive motor 9 is fixedly mounted on the upper side wall of the sliding seat 8. The output shaft extends horizontally, and a drive pulley is coaxially fixed at the end of the shaft to provide power input for the uniform distribution action. One end of the rotary screw 11 is rotatably supported on the lower side wall of the sliding seat 8 through a bearing seat. A driven pulley is coaxially fixed at one end of the rotary screw 11. The driven pulley and the drive pulley are arranged vertically in correspondence. The transmission belt 12 is tensioned and fitted around the outer circumference of the drive pulley and the driven pulley, forming a closed belt drive structure, which synchronously transmits the rotational power output by the uniformly distributed drive motor 9 to the rotary screw 11, causing the rotary screw 11 to rotate around its own axis. The upper part of the uniform distribution frame 10 has an internal threaded hole that matches the external thread of the rotating screw 11. The rotating screw 11 passes through the threaded hole, and the two form a helical transmission engagement. The bottom of the uniform distribution frame 10 is slidably fitted with the bottom guide groove of the sliding seat 8. The guide groove restricts the degree of freedom of the uniform distribution frame 10 as it rotates with the rotating screw 11, retaining only the degree of freedom of linear movement along the screw axis. To further improve the uniform distribution effect, a grid structure is provided at the lower part of the uniform distribution frame 10.

[0035] After the uniform distribution drive motor 9 starts, it drives the rotating screw 11 to rotate via the transmission belt 12. Under the combined constraints of the threaded transmission (the threaded engagement between the rotating screw 11 and the uniform distribution frame 10) and the bottom guide (the limiting of the guide groove), the uniform distribution frame 10 moves back and forth linearly along the axial direction of the rotating screw 11. The grid structure at the bottom of the uniform distribution frame 10 extends into the liquid surface and stirs the water, so that the concentration of aluminum-containing wastewater near the sampling point is uniform, thereby improving the accuracy of subsequent test results.

[0036] The spectrophotometer 13 is fixedly mounted on the top of the sliding base 8. It is the core functional component for aluminum content detection and can be a commercially available online visible spectrophotometer 13 (such as the 722N type visible spectrophotometer 13). The cavity structure of the spectrophotometer 13 is embedded in the upper space of the sliding base 8. The more specific connection relationship is as follows.

[0037] The operating chamber 14 is a fixed cavity space at the bottom of the spectrophotometer 13, forming the mounting reference and rotating movable chamber of the detection chamber 15. The drive unit is linked with the detection chamber 15, providing power for the swinging and rotating of the detection chamber 15. The detection chamber 15 is rotatably mounted inside the operating chamber 14 via a transverse rotating shaft, and can swing around the rotating shaft under the drive of the rotating drive motor, switching between a "downward tilting sampling position" and a "horizontally reset detection position". The detection chamber 15 is a sample receiving cavity for spectrophotometric detection, corresponding to the optical detection path of the spectrophotometer 13. The lower end of the detection chamber 15 is sealed and connected to a suction nozzle 16, and the upper end is sealed and connected to a liquid outlet pipe 17, both of which rotate synchronously with the detection chamber 15. The spectrophotometer 13 has a built-in pump (not shown in the figure), which is connected to the flow path of the detection chamber 15, providing power for liquid suction and discharge.

[0038] When sampling is required, the drive unit drives the detection chamber 15 to flip downwards, so that the suction nozzle 16 is immersed in the aluminum-containing wastewater in the aluminum water collection tank 6. After the built-in pump is started, the aluminum-containing wastewater is drawn into the detection chamber 15 through the suction nozzle 16. Then the detection chamber 15 flips upwards to reset to the horizontal detection position, and the optical system of the spectrophotometer 13 completes the spectrophotometric detection of the aluminum content in the water. After the detection is completed, the wastewater in the detection chamber 15 flows back to the aluminum water collection tank 6 through the liquid outlet pipe 17, completing a single automatic sampling and detection cycle.

[0039] The workflow of this invention is roughly as follows:

[0040] Step 1: Rare earth extraction and aluminum removal reactions are carried out simultaneously in multiple extraction tanks 2 to separate purified rare earth liquid and aluminum-containing wastewater. The rare earth liquid flows through the rare earth discharge pipes 4 of each extraction tank 2 and is collected in the middle rare earth liquid collection tank 5 for centralized storage and subsequent output. The aluminum-containing wastewater flows through the aluminum water discharge pipe 3 that spans above the rare earth liquid collection tank 5 and is discharged into the outer long strip aluminum water collection tank 6 for centralized temporary storage.

[0041] Step 2: The servo motor drives the threaded rod 7 to rotate in the forward / reverse direction. Through the meshing transmission of the threaded pair, the rotary motion is converted into the linear motion of the sliding seat 8, which drives the entire sampling mechanism to slide back and forth along the length of the aluminum water collection box 6, accurately moving to the wastewater discharge point corresponding to any set of extraction boxes 2, and completing the automatic positioning of the sampling position.

[0042] Step 3: After reaching the target sampling position, the uniform drive motor 9 drives the rotating screw 11 to rotate via belt transmission; under the limiting constraint of the threaded transmission and the bottom guide groove, the uniform frame 10 moves back and forth linearly along the axis of the rotating screw 11, and the grid structure at its lower part extends into the liquid surface to stir the water, so that the concentration of aluminum-containing wastewater near the sampling point is uniform, eliminating local concentration deviation and ensuring the accuracy of subsequent detection.

[0043] Step 4: The drive unit rotates the detection chamber 15 downwards, immersing the suction nozzle 16 in the wastewater of the aluminum collection tank 6. The built-in pump starts, drawing the aluminum-containing wastewater through the suction nozzle 16 into the detection chamber 15. The detection chamber 15 then rotates upwards to return to the horizontal detection position, aligning with the optical detection path of the spectrophotometer 13, completing the spectrophotometric detection of the aluminum content in the water sample. After the detection is completed, the wastewater in the detection chamber 15 flows back to the aluminum collection tank 6 through the outlet pipe 17, completing a single automatic sampling and detection process.

[0044] The beneficial effects of this invention are as follows:

[0045] This invention solves the problem of manual operation required for aluminum content detection in aluminum-containing wastewater. The invention uses a transmission structure to automatically move and fix the sampling mechanism, replacing manual sampling. It enables continuous online detection, real-time monitoring of aluminum removal efficiency, ensures the quality of recycled water, reduces labor intensity, and improves detection efficiency. Before sampling, the invention uses a water distribution unit to homogenize the water around the sampling point, eliminating local concentration deviations and ensuring reliable detection data. The spectrophotometer 13 moves synchronously with the mechanism, automatically completing the entire process of sampling, detection, and wastewater recirculation, resulting in a seamless and efficient detection process. The pipeline layout of this invention effectively reduces the floor space required, adapting to the needs of arrayed production layouts in workshops.

[0046] In Example 2, practical application revealed that after the aforementioned sampling mechanism completes aluminum content detection, during the discharge and return process of the aluminum-containing wastewater through the outlet pipe 17, the discharged wastewater is prone to flow direction deviation and droplet splashing due to fluctuations in the discharge flow rate, the sliding vibration of the sampling mechanism, and the limitation of the outlet direction. It cannot all stably flow into the aluminum water collection tank 6. The overflowing wastewater not only pollutes the working environment and corrodes the surrounding equipment structure, but also causes deviations in the total amount and concentration of water in the collection tank, interfering with the accuracy of subsequent sampling and testing. To ensure that the aluminum-containing wastewater discharged from the outlet pipe 17 can flow smoothly and accurately into the aluminum water collection tank 6, this embodiment provides a flow control and guiding structure on the sliding seat 8 corresponding to the discharge end of the outlet pipe 17. The more specific structure of the flow control and guiding structure is as follows.

[0047] refer to Figure 5 The diagram shows the assembly structure of the guide channel 18. As can be seen, the guide channel 18 is installed on the sliding seat 8, corresponding to the outlet side of the liquid outlet pipe 17. The guide channel 18 is fixedly connected to the sliding seat 8 via a fixing bracket. The guide channel 18 is arranged at an angle. When the detection chamber 15 drives the suction nozzle 16 to rotate to the horizontal reset position, the opening of the liquid outlet pipe 17 matches the receiving position of the guide channel 18. Simultaneously, a shut-off valve 19 is installed on the liquid outlet pipe 17 to control the opening and closing of the waste liquid discharge passage. When discharging after detection, the shut-off valve 19 opens, and the aluminum-containing wastewater in the liquid outlet pipe 17 flows out and falls into the guide channel 18. After being guided by the guide channel 18, it flows smoothly into the aluminum molten aluminum collection tank 6, fundamentally solving the problem of waste liquid splashing and overflow.

[0048] In Example 3, in the actual application of Example 1, if the flipping action of the detection chamber 15 relies on an independently set drive unit (e.g., a flipping drive motor), it becomes two independent power systems with the uniform drive motor 9 that drives the uniform distribution frame 10 to move back and forth. The consequences are as follows: on the one hand, additional drive components and supporting control circuits are required, which increases the number of parts and manufacturing costs of the equipment, as well as the structural complexity and the difficulty of later operation and maintenance; on the other hand, the synchronous coordination between the horizontal movement of the uniform distribution frame 10 and the flipping action of the detection chamber 15 depends on the timing control of the electronic control program, which is easily affected by factors such as signal delay and parameter deviation, resulting in misalignment of actions. It is difficult to ensure that the suction nozzle 16 accurately flips to the corresponding station immersed in aluminum-containing wastewater while the uniform distribution frame 10 moves to the designated sampling position, which to some extent affects the operating efficiency and reliability of the sampling operation.

[0049] To overcome the aforementioned shortcomings, this embodiment improves the structure of the drive unit that drives the detection chamber 15 to rotate. It adopts a novel drive unit with pure mechanical linkage, eliminating the need for a separate rotation drive motor for the detection chamber 15. The rotation is directly driven synchronously by the movement of the distribution frame 10 itself. A single drive source can simultaneously achieve both water distribution and sampling rotation operations. This simplifies the equipment structure, reduces manufacturing costs, and ensures the synchronization accuracy of the two actions through mechanical meshing transmission. The more specific structure of this drive unit is as follows.

[0050] refer to Figure 6 The diagram shows the assembly structure of the new drive unit. As can be seen, the drive unit includes a transmission gear 20, which is concentrically fixed on the transverse rotating shaft of the detection chamber 15. A transmission gear plate 21 is correspondingly provided on one side of the transmission gear 20, and the teeth of the two mesh together to form a transmission engagement. The transmission gear plate 21 is fixedly connected to the uniform distribution frame 10 via a support arm 22 and can move horizontally linearly synchronously with the uniform distribution frame 10. When the uniform distribution frame 10 moves towards the sampling position, the transmission gear plate 21 moves synchronously with the uniform distribution frame 10, driving the transmission gear 20 to rotate around the transverse rotating shaft through tooth meshing, thereby causing the detection chamber 15 and the suction nozzle 16 to rotate synchronously. Until the uniform distribution frame 10 moves to the designated sampling position, the suction nozzle 16 rotates precisely to the sampling position immersed in the aluminum-containing wastewater in the aluminum molten aluminum collection tank 6.

[0051] With the new drive unit, the water homogenization can be completed by moving the distribution frame 10, and the sampling action of the detection chamber 15 and the suction nozzle 16 can be completed simultaneously. Two operation actions can be achieved with one drive source, which effectively simplifies the overall structure of the equipment. The mechanical transmission action synchronization is more stable and reliable, avoiding the timing deviation problem that is easy to occur in electrical control synchronization.

[0052] Example 4 addresses the technical problem of insufficient water mixing uniformity in aluminum-containing wastewater sampling operations, where multiple wastewater points cannot be pre-collected around the sampling nozzle 16. This example provides the following improved structure to achieve wastewater pre-collection and pre-mixing before sampling.

[0053] To ensure that the sampling mechanism can pre-collect aluminum-containing wastewater from other locations around the sampling nozzle 16 before sampling the aluminum-containing wastewater, refer to Figures 7 to 8 , Figure 7 The diagram shown is a schematic of the installation structure of the fishing box 28, while Figure 8 The diagram shows a three-dimensional structural schematic of the fishing box 28. As can be seen from the diagram, in this embodiment, the fishing box 28 is connected to the uniform distribution frame 10 via a connector 23. During operation, the uniform distribution frame 10 carries the fishing box 28 toward the suction nozzle 16 of the sampling mechanism until it moves to a position below the suction nozzle 16, thereby collecting aluminum-containing wastewater from multiple points into the sampling area. Meanwhile, a long, narrow channel is provided at the bottom of the fishing box 28, through which aluminum-containing wastewater can enter the interior of the fishing box 28. The beneficial effects of this water inlet method are as follows: First, as the fishing box 28 moves with the distribution frame 10, the aluminum-containing wastewater inside and outside the box can continuously exchange and flow through the channel, achieving re-mixing of the aluminum-containing wastewater entering the fishing box 28, effectively improving the uniformity of water composition and avoiding sampling deviations caused by local water quality differences; Second, the long, narrow channel can reduce the water flow resistance encountered when the fishing box 28 moves, making the equipment operate more smoothly, and at the same time, it can gradually collect wastewater from different areas along the moving path, expanding the coverage of water collection points.

[0054] Furthermore, to address the technical issues in existing aluminum-containing wastewater sampling equipment, such as the fixed vertical height of the collection box 28, the inability to adjust the sampling depth, resulting in the sampling nozzle 16 only being able to collect samples from a single water layer, making the sampling results susceptible to water stratification and lacking representativeness, and the difficulty in adapting the lifting and resetting structure to underwater corrosion conditions, improvements are made to the lifting linkage, guiding, and resetting structure of the collection box 28 based on the aforementioned wastewater pre-collection structure. Automatic switching between horizontal movement and vertical lifting is achieved through a purely mechanical pulley linkage, coupled with an underwater magnetic resetting structure. This allows for sampling of wastewater at different heights without adding an independent lifting drive component. The specific improvement scheme is as follows.

[0055] refer to Figures 9 to 10 ,in, Figure 9 The diagram shown is a schematic of the assembly structure of the improved fishing box 28. Figure 10The diagram shows a three-dimensional structural schematic of the improved fishing box 28. As can be seen, an L-shaped groove 29, consisting of a horizontal single groove and a vertical single groove connected together, is formed on one side of the vertical wall of the sliding seat 8. A wheel assembly adapted to the L-shaped groove 29 is provided on the side of the fishing box 28. The wheel assembly consists of a main wheel 30, a driven wheel 31, and a carrier plate 32. The central axes of both the main wheel 30 and the driven wheel 31 are rotatably connected to the carrier plate 32, and the central axis of the main wheel 30 passes through the carrier plate 32 and rotatably engages with the side wall of the fishing box 28. A torsion spring (not shown in the diagram) is provided at the connection between the main wheel 30 and the carrier plate 32. (Reference) Figures 11 to 12 ,in, Figure 11 The diagram shown is a first usage state diagram of the improved fishing box 28, while Figure 12 The diagram shows the second usage state of the improved fishing box 28. As can be seen from the diagram, when the main wheel 30 and the driven wheel 31 are limited to the horizontal single groove of the L-shaped groove 29, the torsion spring is in a torsional energy storage state. When the wheel assembly moves horizontally with the fishing box 28 to the opening of the vertical single groove and the main wheel 30 is opposite to the opening of the groove, the torsion spring releases the torque, driving the wheel assembly to first move horizontally along direction a and then flip along direction b to enter the vertical single groove. At this time, the torsion spring returns to its natural state.

[0056] Continue as Figure 8 As shown, the connecting piece 23 between the fishing box 28 and the distribution frame 10 adopts a vertical sliding guide structure, consisting of a vertical slide rail 24, a cylindrical bearing 25, a roller 26, and a connecting rod 27. The vertical slide rail 24 is fixed to the corresponding side wall of the fishing box 28. One end of the connecting rod 27 extends into the vertical slide rail 24, and a cylindrical bearing 25 is fixedly fitted onto this end. A roller 26 is rotatably connected inside the cylindrical bearing 25. The roller 26 is embedded in the slide rail 24 and can slide up and down along the slide rail. The other end of the connecting rod 27 is fixedly connected to the distribution frame 10. (Continue to refer to...) Figures 11 to 12 When the wheel assembly is in the horizontal single-slot position, the roller 26 is located at the top of the vertical slide rail 24. During the process of switching the wheel assembly to the vertical single-slot, the fishing box 28 is lifted upwards, and the roller 26 slides down to the bottom along the slide rail, thereby realizing the vertical lifting of the fishing box 28, so that the wastewater collected in the box corresponds to different height layers, and the sampling mechanism suction nozzle 16 completes the multi-depth sample collection.

[0057] To adapt to underwater working conditions and achieve automated reset of the wheel assembly, an epoxy resin-encapsulated DC24V waterproof electromagnet (not shown in the figure) is installed on the top of the vertical slide rail 24. At the same time, a waterproof magnetic coating is applied to the outer wall of the cylindrical bearing 25. When reset is required, the power supply of the waterproof electromagnet is turned on, and the magnetic attraction attracts the cylindrical bearing 25 to move upward along the vertical slide rail 24, driving the fishing box 28 and the wheel assembly to rise synchronously, so that the wheel assembly retracts into the horizontal single groove of the L-shaped groove 29 and completes the limit, thereby realizing the automatic reset of the lifting mechanism.

Claims

1. A device for removing aluminum from rare earth compounds, characterized in that: The system includes a base, multiple extraction tanks arranged side-by-side along the length of the base, each forming an independent extraction reaction chamber. Each extraction tank is connected to an aluminum molten metal discharge pipe for discharging aluminum-containing wastewater and a rare earth discharge pipe for discharging purified rare earth liquid. The aluminum molten metal collection tank is a long, narrow trough fixed to the outside of the rare earth liquid collection tank along the length of the base, used for centralized collection of aluminum-containing wastewater. A sampling mechanism is slidably mounted on the top edge of the aluminum molten metal collection tank and is connected to a drive source on the aluminum molten metal collection tank. It can slide back and forth along the length of the aluminum molten metal collection tank to automatically sample aluminum-containing wastewater at different locations. A spectrophotometer is integrated into the sampling mechanism for detecting the aluminum content of the water sample.

2. The rare earth compound aluminum removal device according to claim 1, characterized in that: The rare earth liquid collection tank is fixed on the base and connected to the rare earth discharge pipe of all extraction tanks for centralized collection of rare earth liquid; the aluminum water discharge pipe spans the space above the rare earth liquid collection tank, and the end outlet is suspended above the aluminum water collection tank.

3. The rare earth compound aluminum removal device according to claim 1, characterized in that: The drive source includes a servo motor, which is fixed at the top edge of one end of the aluminum liquid collection box along its length. The output shaft is coaxially fixed to one end of the threaded rod and is used to output rotational power. The threaded rod extends along the length of the aluminum liquid collection box and is rotatably mounted on the end walls of the aluminum liquid collection box at both ends, allowing it to rotate around its own axis. The sliding seat of the sampling mechanism facing the threaded rod forms a helical transmission engagement with the threaded rod.

4. The rare earth compound aluminum removal device according to claim 1, characterized in that: The sampling mechanism includes a sliding base, which is a vertical frame-shaped structure that slides over the top edge of the aluminum water collection tank. A spectrophotometer is fixedly installed on the top of the sliding base to detect the aluminum content of the water sample. An operating chamber is set at the bottom of the spectrophotometer, and a detection chamber is mounted inside the operating chamber via a horizontal rotating shaft. A drive unit is linked to the detection chamber to drive the detection chamber to swing around the shaft and switch its working position. The lower end of the detection chamber is sealed and connected to a suction nozzle, and the upper end is sealed and connected to a liquid outlet pipe, serving as a sample receiving chamber for spectrophotometric detection. The spectrophotometer has a built-in pump body, which is connected to the flow path of the detection chamber to provide power for liquid suction and discharge.

5. The rare earth compound aluminum removal device according to claim 4, characterized in that: The water distribution unit includes a distribution drive motor, which is fixedly mounted on the upper side wall of the sliding seat. The output shaft extends horizontally, and the end of the shaft is coaxially fixed to the drive pulley. A rotating screw is rotatably supported on the lower side wall of the sliding seat. One end of the rotating screw is coaxially fixed to the driven pulley, which is connected to the drive pulley via a transmission belt. The upper part of the distribution frame has an internal thread hole that matches the external thread of the rotating screw, forming a helical transmission engagement with the rotating screw. A guide groove is provided at the bottom of the sliding seat, and the bottom of the distribution frame slides in accordance with the guide groove.

6. The rare earth compound aluminum removal device according to claim 5, characterized in that: The lower part of the uniform distribution frame is equipped with a grid structure, which is used to extend below the liquid surface to stir the water.

7. The rare earth compound aluminum removal device according to claim 1, characterized in that: A guide channel is installed on the side of the liquid outlet of the sampling mechanism on the sliding seat. The guide channel is fixedly connected to the sliding seat through a fixing frame. The guide channel is arranged at an angle. When the detection chamber is flipped to the horizontal reset position, the liquid outlet of the sampling mechanism is matched with the receiving position of the guide channel. A shut-off valve is installed on the liquid outlet of the sampling mechanism to control the opening and closing of the waste liquid discharge passage.

8. The rare earth compound aluminum removal device according to claim 5, characterized in that: A collection box is connected to the uniform distribution frame via connectors. The collection box can be moved with the uniform distribution frame to the area below the suction nozzle to collect aluminum-containing wastewater from multiple locations into the sampling area.

9. The rare earth compound aluminum removal device according to claim 8, characterized in that: The bottom of the fishing box has a long, narrow channel for aluminum-containing wastewater to enter and exit the box.

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