A recovery device for recovering rare earth metals from rare earth metal slag

Abstract

The present application relates to the technical field of rare earth metal recovery, and particularly relates to a recovery device for recovering rare earth metals from rare earth metal slag, comprising a tank body and a blowing assembly. The tank body has a drying cavity and a control cavity and is separated by a partition. A mesh plate is arranged in the drying cavity, and the mesh plate is slidably matched to the drying cavity and is driven by a driving mechanism. An exhaust mechanism is further arranged at the top of the drying cavity. The blowing assembly is arranged in the control cavity, penetrates through the partition and extends to the drying cavity, and is in sliding seal with the partition. A plurality of blowing assemblies are distributed at intervals along the bottom of the drying cavity. Each blowing assembly is matched with a lifting assembly for driving each blowing assembly to extend into or exit from the drying cavity, respectively. The device can effectively improve the drying efficiency of the precipitation, effectively reduce the loss of the precipitation in the drying process, improve the protection effect on the crystal form of the precipitation, and improve the recovery effect of the rare earth metals.

Description

Technical Field

[0001] This invention relates to the field of rare earth metal recycling technology, and more specifically, to a recycling device for recovering rare earth metals from rare earth metal slag. Background Technology

[0002] Chinese patent document CN112981123B provides a method for recovering rare earth elements using low-purity silicon and rare earth oxide materials. In this method, rare earth fluoride can be obtained by drying the rare earth fluoride precipitate obtained in step 3.

[0003] In actual production, traditional equipment has the problem of low drying efficiency when performing precipitation drying. Although some equipment has optimized the drying efficiency to a certain extent, it has brought about problems such as large precipitation loss and serious damage to the precipitation crystal form.

[0004] These factors have had a negative impact on the recycling of rare earth metals.

[0005] In view of the above, this application is hereby submitted. Summary of the Invention

[0006] The purpose of this invention is to provide a recovery device for recovering rare earth metals from rare earth metal slag, which can effectively improve the drying efficiency of the precipitate, effectively reduce the loss of the precipitate during the drying process, improve the protection effect on the precipitate crystal form, and improve the recovery effect of rare earth metals.

[0007] The embodiments of the present invention are implemented as follows:

[0008] A recovery device for recovering rare earth metals from rare earth metal slag, comprising: a tank and an air blowing assembly.

[0009] The tank has a drying chamber and a control chamber. The control chamber is located below the drying chamber, and the control chamber and the drying chamber are separated by a partition.

[0010] The drying chamber is equipped with a mesh plate to prevent powder from settling. The mesh plate is arranged laterally, and its edges are all in contact with the inner wall of the drying chamber. The mesh plate is slidably fitted into the drying chamber along its height and is driven by a drive mechanism. An exhaust mechanism is also located at the top of the drying chamber, above the mesh plate.

[0011] The air blowing assembly is located in the control chamber and extends through the partition into the drying chamber. The air blowing assembly and the partition are slidably sealed. Multiple air blowing assemblies are distributed at intervals along the bottom of the drying chamber. Each air blowing assembly is equipped with a lifting assembly, which is used to drive each air blowing assembly to extend into or out of the drying chamber.

[0012] Furthermore, the air blowing assembly includes: an air blowing pipe, a mounting base, and a first cylinder.

[0013] An air inlet pipe is located at the bottom of the control chamber, and all air blowing pipes are connected to the air inlet pipe. The air blowing pipes are arranged along the height direction of the control chamber. The mounting base is slidably fitted onto the air blowing pipes and is driven by a lifting assembly.

[0014] The first cylinder is slidably fitted onto the air blowing pipe, and there is a sliding seal between the first cylinder and the air blowing pipe. The bottom end of the first cylinder is fixedly connected to the mounting base, the first cylinder passes through the partition and slides and seals with the partition, the top end of the first cylinder is closed, and the air blowing pipe extends to the partition.

[0015] The side wall of the first cylinder has an air outlet, and multiple air outlets are spaced apart along the axial direction of the first cylinder.

[0016] Furthermore, the air blowing assembly also includes a second cylinder.

[0017] The second cylinder is fitted onto the first cylinder and coaxially arranged with it. The inner diameter of the second cylinder is larger than the outer diameter of the first cylinder, and the second cylinder and the first cylinder are fixedly fitted together. The bottom end of the second cylinder is also fixedly connected to the mounting base. The second cylinder passes through the partition and slides and seals with the partition. The top end of the second cylinder is closed.

[0018] A separator is fixedly connected between the outer wall of the first cylinder and the inner wall of the second cylinder, and the separator extends continuously in a ring shape along the circumference of the first cylinder. Multiple separators are spaced apart along the axial direction of the first cylinder, thereby dividing the gap between the first and second cylinders into multiple independent cavities. The air outlet is connected to each cavity in a one-to-one correspondence.

[0019] The side wall of the second cylinder is provided with air inlets. Multiple air inlets are spaced apart along the axial direction of the second cylinder, and the air inlets are connected to the cavities one by one.

[0020] Furthermore, along the axial direction of the second cylinder, among the air outlet and air blowing port that communicate with the same cavity, the height of the air outlet is higher than the height of the air blowing port, and the lower end face of the air outlet is higher than the upper end face of the air blowing port.

[0021] Furthermore, the air blowing assembly also includes a top block.

[0022] The top block is fixedly connected to the top of the first cylinder and the second cylinder and closes the top of the first cylinder and the second cylinder.

[0023] The top block is hemispherical and is connected to the first cylinder and the second cylinder through its planar wall. The top block is coaxially arranged with the first cylinder and the second cylinder, and the diameter of the top block is larger than the diameter of the second cylinder.

[0024] When the first and second cylinders reach their bottom stop, the flat wall of the top block fits against the bottom wall of the drying chamber.

[0025] Furthermore, the air blowing assembly also includes a switching mechanism.

[0026] Each cavity is equipped with a switching mechanism, which includes a blocking block, a stop block, a connecting rod, a trigger block, and an elastic element.

[0027] The sealing block is adapted to the air inlet, the stop block is fixedly connected to the side of the sealing block away from the air inlet, and the connecting rod is fixedly connected to the side of the stop block away from the sealing block.

[0028] The inner wall of the first cylinder is provided with a blind hole for installation. Each cavity is provided with a corresponding blind hole for installation. The connecting rod passes through the side wall of the first cylinder and extends to the blind hole for installation. The connecting rod is slidably fitted into the first cylinder.

[0029] The end of the connecting rod away from the stop block is fixedly connected to the trigger block, which is slidably fitted into the blind hole. The elastic element abuts against the bottom of the blind hole and the trigger block.

[0030] In its natural state, the elastic element can push the trigger block out of the mounting blind hole, causing the sealing block to exit from the air inlet, thereby opening the air inlet. The air inlet tube can press the trigger block into the mounting blind hole, causing the sealing block to engage with the air inlet, thereby closing the air inlet.

[0031] Furthermore, the end face of the trigger block away from the connecting rod is an inclined plane. Along the axial direction of the connecting rod, the distance between the lower end of the inclined plane and the stop block is smaller than the distance between the upper end of the inclined plane and the stop block.

[0032] When the trigger block is pushed out by the elastic element, the stop block abuts against the outer wall of the first cylinder, and the lower end of the inclined surface is flush with the inner wall of the first cylinder.

[0033] Furthermore, the second cylinder is also provided with bypass holes, which are located near the blowing port, and each blowing port is provided with a bypass hole.

[0034] A bypass hole is formed on the inner wall of the air inlet and extends to the cavity corresponding to the air inlet. The end of the bypass hole that is connected to the air inlet is located near the outer end of the air inlet.

[0035] Furthermore, a bypass hole is opened on the upper side of the inner wall of the air inlet, the bypass hole is located above the air inlet, and the outlet direction of the bypass hole faces the lower side and outer end of the air inlet.

[0036] When the trigger block is pushed back to the blind hole by the air pipe, the sealing block closes the outlet end of the bypass hole and the air inlet, and the stop block fits against the inner wall of the second cylinder and closes the inlet end of the bypass hole.

[0037] Furthermore, the air tube extends beyond the partition, and the bottom of the top block has a relief groove for fitting the top of the air tube.

[0038] The beneficial effects of the technical solutions in the embodiments of the present invention include:

[0039] The rare earth metal recovery device for recovering rare earth metals from rare earth metal slag provided in this invention, during use, involves feeding the precipitate (e.g., precipitate block) into the drying chamber. Based on the amount of precipitate fed in, a drive mechanism controls the movement of a screen plate, bringing the screen plate close to the precipitate block. The screen plate prevents the precipitate from adhering to the inner wall of the drying chamber after drying, thus reducing precipitate loss.

[0040] During drying, a lifting assembly controls the air blowing assembly to rise, thereby introducing a dry, hot airflow into the drying chamber to dry the precipitate. During the drying process, the dry, hot airflow flows from bottom to top, greatly enhancing the encapsulation of the precipitate and optimizing the drying effect. Furthermore, the air blowing assembly also agitates the precipitate during its ascent, further improving the drying effect and efficiency.

[0041] Overall, the recovery device for recovering rare earth metals from rare earth metal slag provided in this embodiment of the invention can effectively improve the drying efficiency of the precipitate, effectively reduce the loss of the precipitate during the drying process, and improve the protection effect on the precipitate crystal form, thereby improving the recovery effect of rare earth metals. Attached Figure Description

[0042] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of the overall structure of a recovery device for recovering rare earth metals from rare earth metal slag, provided in an embodiment of the present invention.

[0044] Figure 2 This is a schematic diagram of the structure of the partition of the recovery device for recovering rare earth metals from rare earth metal slag provided in an embodiment of the present invention.

[0045] Figure 3 A schematic diagram of the conversion counter during the turning of the sediment block in the recovery device for recovering rare earth metals from rare earth metal slag provided in an embodiment of the present invention.

[0046] Figure 4 This is a schematic diagram of the overall structure of the air blowing component of the recovery device for recovering rare earth metals from rare earth metal slag, provided in an embodiment of the present invention.

[0047] Figure 5This is a schematic diagram of the top of the air blowing assembly of the recovery device for recovering rare earth metals from rare earth metal slag, provided in an embodiment of the present invention.

[0048] Figure 6 This is a schematic diagram of the switching mechanism of the air blowing component of the recovery device for recovering rare earth metals from rare earth metal slag provided in an embodiment of the present invention (air blowing port closed);

[0049] Figure 7 This is a schematic diagram of the switching mechanism of the air blowing component of the recovery device for recovering rare earth metals from rare earth metal slag provided in an embodiment of the present invention (air blowing port open);

[0050] Figure 8 This is a schematic diagram showing the conduction of the bypass hole of the air blowing component of the recovery device for recovering rare earth metals from rare earth metal slag, provided in an embodiment of the present invention.

[0051] Explanation of reference numerals in the attached figures:

[0052] Recovery device 1000; tank 100; drying chamber 110; control chamber 120; partition 130; mesh plate 140; drive mechanism 150; exhaust mechanism 160; air inlet pipe 170; air blowing assembly 200; air blowing pipe 210; mounting base 220; first cylinder 230; air outlet 231; blind mounting hole 232; second cylinder 240; air blowing port 241; bypass hole 242; separator 250; cavity 251; top block 260; clearance groove 261; switching mechanism 270; sealing block 271; stop block 272; connecting rod 273; trigger block 274; elastic element 275; lifting assembly 300. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0054] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0055] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0056] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0057] Furthermore, the terms "parallel" and "perpendicular" do not imply that components must be absolutely parallel or perpendicular, but rather that they can be slightly tilted. For example, "parallel" simply means that its direction is more parallel than "perpendicular," not that the structure must be perfectly parallel, but that it can be slightly tilted.

[0058] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0059] Example

[0060] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 5 This embodiment provides a recovery device 1000 for recovering rare earth metals from rare earth metal slag. The recovery device 1000 includes a tank 100 and an air blowing assembly 200.

[0061] The tank 100 has a drying chamber 110 and a control chamber 120. The control chamber 120 is located below the drying chamber 110. The control chamber 120 and the drying chamber 110 are separated by a partition 130. The drying chamber 110 and the control chamber 120 are independent of each other.

[0062] The drying chamber 110 is equipped with a mesh plate 140 for blocking the precipitated powder. The mesh size of the mesh plate 140 can be determined according to the particle size of the precipitated powder after drying.

[0063] The mesh plate 140 is arranged laterally, and its edges are all in contact with the inner wall of the drying chamber 110. Along the height direction of the drying chamber 110, the mesh plate 140 is slidably fitted into the drying chamber 110 and driven by the drive mechanism 150. An exhaust mechanism 160 is also provided at the top of the drying chamber 110, and the exhaust mechanism 160 is located above the mesh plate 140.

[0064] An air blowing assembly 200 is disposed in the control chamber 120, and the air blowing assembly 200 passes through the partition 130 and extends into the drying chamber 110. The air blowing assembly 200 and the partition 130 are slidably sealed. Multiple air blowing assemblies 200 are distributed at intervals along the bottom of the drying chamber 110. Each air blowing assembly 200 is equipped with a lifting assembly 300, which is used to drive each air blowing assembly 200 to extend into or out of the drying chamber 110.

[0065] The tank body 100 is also provided with a feeding port (not shown in the figure) for putting the precipitate to be dried into the drying chamber 110. The feeding port may be opened on the side wall of the tank body 100, but is not limited thereto.

[0066] After the precipitate to be dried (e.g., precipitate block) is added to the drying chamber 110, the drive mechanism 150 controls the movement of the screen plate 140 according to the amount of precipitate added, so that the screen plate 140 is close to the precipitate block. The screen plate 140 can prevent the precipitate from adhering to the inner wall of the drying chamber 110 after drying, thereby reducing the loss of precipitate.

[0067] During drying, the air blowing assembly 200 is raised by the lifting assembly 300, thereby sending a dry hot airflow into the drying chamber 110 to dry the precipitate.

[0068] The temperature for different types of gases can be determined based on the specific type of precipitate.

[0069] During the drying process, the hot airflow moves from bottom to top, greatly enhancing the encapsulation of the sediment and optimizing the drying effect. Furthermore, the air blowing assembly 200 can also agitate the sediment during its ascent, further improving the drying effect and efficiency.

[0070] Overall, the recovery device 1000 for recovering rare earth metals from rare earth metal slag can effectively improve the drying efficiency of the precipitate, while effectively reducing the loss of the precipitate during the drying process and improving the protection effect on the precipitate crystal form, thereby improving the recovery effect of rare earth metals.

[0071] It should be noted that the exhaust mechanism 160 can also be equipped with a separator for separating moisture, after which the gas can be recycled.

[0072] During the drying process, each air blowing assembly 200 can be individually controlled to rise and fall using the lifting assembly 300, thereby effectively agitating the sediment. For example... Figure 3 As shown, adjacent air blowing components 200 alternately rise and fall, thereby turning over the sediment, which on the one hand enhances the drying effect, and on the other hand prevents the sediment from adhering to the bottom of the drying chamber 110.

[0073] Please combine Figures 1 to 8 The air blowing assembly 200 includes: an air blowing pipe 210, a mounting base 220, and a first cylinder 230.

[0074] The bottom of the control chamber 120 is provided with an air inlet pipe 170, which is used to introduce dry hot airflow from the outside for drying the precipitate.

[0075] All air blowing pipes 210 are connected to the air inlet pipe 170, and the air blowing pipes 210 are arranged along the height direction of the control cavity 120. The mounting base 220 is slidably fitted to the air blowing pipe 210 and is driven by the lifting assembly 300.

[0076] The first cylinder 230 is slidably fitted onto the air blowing pipe 210, and the first cylinder 230 and the air blowing pipe 210 are slidably sealed. The bottom end of the first cylinder 230 is fixedly connected to the mounting base 220, the first cylinder 230 passes through the partition 130 and is slidably sealed with the partition 130, the top end of the first cylinder 230 is closed, and the air blowing pipe 210 extends to the partition 130.

[0077] The side wall of the first cylinder 230 is provided with an air outlet 231, and multiple air outlets 231 are spaced apart along the axial direction of the first cylinder 230.

[0078] Through this design, the air blowing pipe 210 serves both as an air supply and control device, and also acts as a support for the movement of the first cylinder 230. When the first cylinder 230 rises and extends into the drying chamber 110, the air outlet 231 moves above the air blowing pipe 210, and the air outlet 231 opens, allowing the dry hot airflow to enter the drying chamber 110 through the air outlet 231.

[0079] Furthermore, the air blowing assembly 200 also includes a second cylinder 240.

[0080] The second cylindrical body 240 is sleeved on the first cylindrical body 230 and coaxially arranged with the first cylindrical body 230. The inner diameter of the second cylindrical body 240 is larger than the outer diameter of the first cylindrical body 230, and the second cylindrical body 240 and the first cylindrical body 230 are fixedly fitted together. The bottom end of the second cylindrical body 240 is also fixedly connected to the mounting base 220. The second cylindrical body 240 passes through the partition plate 130 and slides and seals with the partition plate 130. The top end of the second cylindrical body 240 is closed.

[0081] A separator 250 is fixedly connected between the outer wall of the first cylinder 230 and the inner wall of the second cylinder 240. The separator 250 extends continuously in a ring shape along the circumference of the first cylinder 230. Multiple separators 250 are spaced apart along the axial direction of the first cylinder 230, thereby dividing the gap between the first cylinder 230 and the second cylinder 240 into multiple independent cavities 251. The air outlet 231 is connected to each cavity 251 in a one-to-one correspondence.

[0082] The side wall of the second cylinder 240 is provided with an air blowing port 241. Multiple air blowing ports 241 are arranged at intervals along the axial direction of the second cylinder 240, and the air blowing ports 241 are connected to the cavity 251 in a one-to-one correspondence.

[0083] This design effectively prevents sediment from accidentally entering the air blowing pipe 210.

[0084] Along the axial direction of the second cylinder 240, among the air outlet 231 and the air blowing port 241 that are connected to the same cavity 251, the height of the air outlet 231 is higher than the height of the air blowing port 241. Specifically, the lower end face of the air outlet 231 is higher than the upper end face of the air blowing port 241.

[0085] With this design, when the mounting base 220 rises, the air outlet 231 connects to the air pipe 210 before the air outlet 241 opens, allowing hot air to be blown out from the air outlet 241 the instant it opens. When the mounting base 220 descends, hot air continues to flow from the air outlet 241 until it is completely closed. Only after the air outlet 241 is completely closed will the corresponding air outlet 231 close. This effectively prevents sediment from entering the air outlet 241 and avoids sediment loss.

[0086] Furthermore, the air blowing assembly 200 also includes a top block 260.

[0087] The top block 260 is fixedly connected to the top of the first cylinder 230 and the second cylinder 240 and closes the top of the first cylinder 230 and the second cylinder 240.

[0088] The top block 260 is hemispherical and is connected to the first cylinder 230 and the second cylinder 240 through its planar wall. The top block 260 is coaxially arranged with the first cylinder 230 and the second cylinder 240, and the diameter of the top block 260 is larger than the diameter of the second cylinder 240.

[0089] When the first cylinder 230 and the second cylinder 240 reach their bottom stop, the flat wall of the top block 260 fits against the bottom wall of the drying chamber 110.

[0090] With this design, when the sediment block is placed into the drying chamber 110, the sediment block is supported by the top block 260, making it less likely to completely adhere to the bottom of the drying chamber 110, thus reducing the possibility of the sediment block sticking to the bottom of the drying chamber 110. At the same time, with the support of the top block 260, there is a larger gap between the sediment block and the bottom of the drying chamber 110, which is more conducive to the drying process.

[0091] The air blowing assembly 200 also includes a switching mechanism 270.

[0092] Each cavity 251 is provided with a switching mechanism 270, which includes a blocking block 271, a stop block 272, a connecting rod 273, a trigger block 274, and an elastic element 275.

[0093] The sealing block 271 is adapted to the air inlet 241, the stop block 272 is fixedly connected to the side of the sealing block 271 away from the air inlet 241, and the connecting rod 273 is fixedly connected to the side of the stop block 272 away from the sealing block 271.

[0094] The inner wall of the first cylinder 230 is provided with a blind hole 232. Each cavity 251 is provided with a corresponding blind hole 232. The connecting rod 273 passes through the side wall of the first cylinder 230 and extends to the blind hole 232. The connecting rod 273 is slidably fitted to the first cylinder 230.

[0095] The end of the connecting rod 273 away from the stop block 272 is fixedly connected to the trigger block 274. The trigger block 274 is slidably fitted in the mounting blind hole 232. The elastic element 275 abuts against the bottom of the hole between the trigger block 274 and the mounting blind hole 232.

[0096] In its natural state, the elastic element 275 can push the trigger block 274 out of the mounting blind hole 232, causing the sealing block 271 to exit from the air outlet 241, thereby opening the air outlet 241. The air pipe 210 can press the trigger block 274 into the mounting blind hole 232, causing the sealing block 271 to engage with the air outlet 241, thereby closing the air outlet 241.

[0097] This design further effectively prevents sediment from entering the air inlet 241.

[0098] Furthermore, the air blowing pipe 210, in conjunction with the first cylinder 230 and the switching mechanism 270, can more effectively seal the air blowing port 241. When the first cylinder 230 and the second cylinder 240 rise partially, the upper air blowing port 241 opens while the lower air blowing port 241 remains closed. This structure effectively prevents air leakage from the lower air blowing port 241, reducing the waste of hot airflow and minimizing losses for the recirculated dry gas.

[0099] In this embodiment, the end face of the trigger block 274 away from the connecting rod 273 is an inclined surface. Along the axial direction of the connecting rod 273, the distance between the lower end of the inclined surface and the stop block 272 is smaller than the distance between the upper end of the inclined surface and the stop block 272. The air inlet 241 is a circular hole, and the sealing block 271 is a cylindrical shape that matches it.

[0100] When the trigger block 274 is pushed out by the elastic element 275, the stop block 272 abuts against the outer wall of the first cylinder 230, and the lower end of the inclined surface is flush with the inner wall of the first cylinder 230.

[0101] The second cylinder 240 is also provided with a bypass hole 242, which is located near the blowing port. Each blowing port 241 is provided with a bypass hole 242.

[0102] A bypass hole 242 is formed on the inner wall of the air inlet 241 and extends to the cavity 251 corresponding to the air inlet 241. One end of the bypass hole 242 that is connected to the air inlet 241 is located near the outer end of the air inlet 241.

[0103] Specifically, the bypass hole 242 is opened on the upper side of the inner wall of the air inlet 241. The bypass hole 242 is located above the air inlet 241, and the outlet direction of the bypass hole 242 is towards the lower side and outer end of the air inlet 241.

[0104] When the trigger block 274 is pressed back to the mounting blind hole 232 by the air blowing pipe 210, the sealing block 271 seals the outlet end of the bypass hole 242 and the air blowing port 241, and the stop block 272 fits against the inner wall of the second cylinder 240 and seals the inlet end of the bypass hole 242.

[0105] With this design, when the mounting base 220 moves downward, the first cylinder 230 and the second cylinder 240 descend, and the air inlets 241 close one by one. For the air inlet 241 that begins to close, the end of the air pipe 210 contacts the end face of the trigger block 274 away from the connecting rod 273, and the switching mechanism 270 is gradually pushed toward the side where the air inlet 241 is located, and the sealing block 271 gradually enters the air inlet 241.

[0106] When the blocking block 271 enters the air blowing port 241, although the blocking block 271 has not yet fully entered the air blowing port 241, the air blowing port 241 has been blocked by the blocking block 271 and the air blowing port 241 no longer emits air. However, hot air can still be blown out through the bypass hole 242 and blown towards the lower side and outer end of the air blowing port 241. This can blow away the sediment around the second cylinder 240 and prevent the sediment from getting stuck between the second cylinder 240 and the partition 130.

[0107] On the other hand, when the last air inlet 241 (i.e., the uppermost air inlet 241) is about to close, such as Figure 8 As shown, the hot airflow blown out from the bypass hole 242 blows towards the bottom of the drying chamber 110 and back to the bottom of the top block 260. In this way, the sediment between the bottom of the drying chamber 110 and the top block 260 can be fully blown out, preventing the sediment from getting stuck between the top block 260 and the bottom wall of the drying chamber 110, thus reducing the loss of sediment.

[0108] In this embodiment, the air blowing pipe 210 extends beyond the partition 130, and the bottom of the top block 260 is provided with a relief groove 261 for adapting to the top of the air blowing pipe 210.

[0109] In summary, the recovery device 1000 for recovering rare earth metals from rare earth metal slag provided in this embodiment of the invention can effectively improve the drying efficiency of the precipitate, effectively reduce the loss of the precipitate during the drying process, and improve the protection effect on the precipitate crystal form, thereby improving the recovery effect of rare earth metals.

[0110] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A recovery device for recovering rare earth metals from rare earth metal slag, characterized in that, include: Tank and air blowing assembly; The tank has a drying chamber and a control chamber, the control chamber being located below the drying chamber, and the control chamber and the drying chamber being separated by a partition. The drying chamber is equipped with a mesh plate for blocking precipitated powder. The mesh plate is arranged horizontally and its edges are all in contact with the inner wall of the drying chamber. The mesh plate is slidably fitted into the drying chamber along the height direction and is driven by a drive mechanism. The top of the drying chamber is also equipped with an exhaust mechanism, which is located above the mesh plate. The air blowing assembly is located in the control chamber and extends through the partition to the drying chamber. The air blowing assembly and the partition are slidably sealed. Multiple air blowing assemblies are distributed at intervals along the bottom of the drying chamber. Each air blowing assembly is equipped with a lifting assembly for driving each air blowing assembly to extend into or out of the drying chamber. The air blowing assembly includes: an air blowing pipe, a mounting base, and a first cylinder; The bottom of the control cavity is provided with an air inlet pipe, and all the air blowing pipes are connected to the air inlet pipe. The air blowing pipes are arranged along the height direction of the control cavity. The mounting base is slidably fitted with the air blowing pipe and is driven by the lifting assembly. The first cylinder is slidably fitted onto the air blowing pipe, and the first cylinder and the air blowing pipe are slidably sealed; the bottom end of the first cylinder is fixedly connected to the mounting base, the first cylinder passes through the partition and is slidably sealed with the partition, the top end of the first cylinder is closed, and the air blowing pipe extends to the partition. The first cylinder has an air outlet on its side wall, and multiple air outlets are spaced apart along the axial direction of the first cylinder. The air blowing assembly further includes: a second cylinder; The second cylinder is sleeved on the first cylinder and coaxially arranged with the first cylinder. The inner diameter of the second cylinder is larger than the outer diameter of the first cylinder. The second cylinder and the first cylinder are fixedly fitted together. The bottom end of the second cylinder is also fixedly connected to the mounting base. The second cylinder passes through the partition and slides and seals with the partition. The top end of the second cylinder is closed. A separator is fixedly connected between the outer wall of the first cylinder and the inner wall of the second cylinder. The separator extends continuously in a ring shape along the circumference of the first cylinder. Multiple separators are spaced apart along the axial direction of the first cylinder, thereby dividing the gap between the first cylinder and the second cylinder into multiple independent cavities. The air outlet is connected to each cavity in a one-to-one correspondence. The second cylinder has air inlets on its side wall. Multiple air inlets are spaced apart along the axial direction of the second cylinder, and each air inlet is connected to the cavity in a one-to-one correspondence. The air blowing assembly further includes: a switching mechanism; Each cavity is provided with the switching mechanism, which includes a blocking block, a stop block, a connecting rod, a trigger block, and an elastic element. The blocking block is adapted to the air inlet, the stop block is fixedly connected to the side of the blocking block away from the air inlet, and the connecting rod is fixedly connected to the side of the stop block away from the blocking block; The inner wall of the first cylinder is provided with a blind hole for installation. Each cavity is provided with a corresponding blind hole for installation. The connecting rod passes through the side wall of the first cylinder and extends to the blind hole for installation. The connecting rod is slidably fitted to the first cylinder. The end of the connecting rod away from the stop block is fixedly connected to the trigger block, the trigger block is slidably fitted in the mounting blind hole, and the elastic element abuts against the bottom of the mounting blind hole and the trigger block; In its natural state, the elastic element can push the trigger block out of the mounting blind hole, causing the sealing block to exit from the air inlet, thereby opening the air inlet; the air inlet tube can press the trigger block into the mounting blind hole, causing the sealing block to engage with the air inlet, thereby closing the air inlet.

2. The recovery device for recovering rare earth metals from rare earth metal slag according to claim 1, characterized in that, Along the axial direction of the second cylinder, among the air outlet and the air blowing port that communicate with the same cavity, the height of the air outlet is higher than the height of the air blowing port, and the lower end face of the air outlet is higher than the upper end face of the air blowing port.

3. The recovery apparatus for recovering rare earth metals from rare earth metal slag according to claim 1 or 2, characterized in that, The air blowing assembly further includes: a top block; The top block is fixedly connected to the top ends of the first cylinder and the second cylinder and closes the top ends of the first cylinder and the second cylinder; The top block is hemispherical and is connected to the first cylinder and the second cylinder through its planar wall. The top block is coaxially arranged with the first cylinder and the second cylinder, and the diameter of the top block is larger than the diameter of the second cylinder. When the first cylinder and the second cylinder reach their bottom stop, the planar wall of the top block fits against the bottom wall of the drying chamber.

4. The recovery device for recovering rare earth metals from rare earth metal slag according to claim 3, characterized in that, The end face of the trigger block away from the connecting rod is an inclined surface. Along the axial direction of the connecting rod, the distance between the lower end of the inclined surface and the stop block is smaller than the distance between the upper end of the inclined surface and the stop block. When the trigger block is pushed out by the elastic element, the stop block abuts against the outer wall of the first cylinder, and the lower end of the inclined surface is flush with the inner wall of the first cylinder.

5. The recovery apparatus for recovering rare earth metals from rare earth metal slag according to claim 3, characterized in that, The second cylinder is also provided with a bypass hole, which is located near the air inlet, and each air inlet is provided with the bypass hole; The bypass hole is formed on the inner wall of the air inlet and extends to the cavity corresponding to the air inlet. One end of the bypass hole that is connected to the air inlet is located near the outer end of the air inlet.

6. The recovery apparatus for recovering rare earth metals from rare earth metal slag according to claim 5, characterized in that, The bypass hole is opened on the upper side of the inner wall of the air inlet, the bypass hole is located above the air inlet, and the outlet direction of the bypass hole faces the lower side and outer end of the air inlet. When the trigger block is pressed back to the mounting blind hole by the air blowing pipe, the sealing block closes the outlet end of the bypass hole and the air blowing port, and the stop block fits against the inner wall of the second cylinder and closes the inlet end of the bypass hole.

7. The recovery apparatus for recovering rare earth metals from rare earth metal slag according to claim 6, characterized in that, The air blowing pipe extends beyond the partition, and the bottom of the top block has a relief groove for fitting the top of the air blowing pipe.

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