Water-washing extraction equipment and process for rare earth elements in ardealite

Abstract

The invention discloses washing extraction equipment for rare earth elements in phosphogypsum. The washing extraction equipment comprises a working box and a feeding mechanism, a grinding mechanism is fixedly mounted in the working box, a crushing mechanism is fixedly mounted at the top of the working box, a mixing box is fixedly mounted at the bottom of the working box, and a spiral pushing rod is rotationally mounted in the mixing box. By adjusting the distance between two sets of crushing rollers in the crushing assembly, the crushing granularity of the crushing assembly is adjusted, the rare earth element extraction rate can be improved, phosphogypsum precipitated at the bottom of the mixing box is pushed to a discharging pipe through a rotating spiral pushing rod, the phosphogypsum is extruded and discharged through the conical discharging pipe, and the rare earth element extraction efficiency is improved. The washing liquid containing the rare earth elements is separated from solid residues, so that the washing liquid containing the rare earth elements is fully recycled. The invention also discloses a washing extraction process of rare earth elements in phosphogypsum, which is simple and convenient to operate.

Description

Technical Field

[0001] The invention relates to the technical field of rare earth element extraction, and in particular to a device and a process for water-washing extraction of rare earth elements in phosphogypsum. Background Art

[0002] Phosphogypsum is the main by-product produced by phosphorus chemical enterprises in the production of wet phosphoric acid. The presence of rare earth elements in phosphogypsum makes phosphogypsum not only have traditional uses such as building materials and chemical raw materials, but also have potential rare earth resource recovery value. With the increasing demand for rare earth elements in the field of high-tech, extracting rare earth elements from phosphogypsum not only has significant economic benefits, but also helps to alleviate the shortage of rare earth resources and promote the development of high-tech industries. It also helps to achieve high-value-added resource utilization of phosphogypsum, reduce its pollution to the environment and occupation of land resources, and promote the sustainable development of the phosphorus chemical industry and the development of high-tech industries.

[0003] The Chinese patent application publication number CN117568631A discloses a water-washing extraction device for rare earth elements in phosphogypsum, comprising an extraction box, a support cylinder is horizontally arranged on the upper side of the extraction box, L-shaped support plates facing the support cylinder are arranged on both sides of the extraction box, a support sleeve is arranged between the two L-shaped support plates, a crushing device is arranged on one side of the extraction box, a stirring device and a grinding device are arranged in the extraction box, a retrieval device is arranged in the support cylinder, a filtering device is arranged in the support sleeve, and a driving device is arranged on the extraction box. It has the following defects: it is impossible to adjust the process parameters of phosphogypsum crushing according to different phosphogypsum raw materials and extraction requirements, resulting in the inability to fully extract rare earth elements from phosphogypsum in the subsequent extraction process, and it is also easy to cause the problem of blocking the grinding device, so that it cannot adapt to different production needs, and it is also impossible to dehydrate the phosphogypsum, resulting in the loss of rare earth elements. Summary of the invention

[0004] The present invention aims to solve the above-mentioned problems existing in the prior art equipment for water-washing and extracting rare earth elements in phosphogypsum, and provides a equipment for water-washing and extracting rare earth elements in phosphogypsum, which has good flexibility in use and can improve the extraction efficiency and extraction rate of rare earth elements.

[0005] The invention also provides a water-washing extraction process for rare earth elements in phosphogypsum.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a water-washing extraction device for rare earth elements in phosphogypsum of the present invention comprises a working box and a feeding mechanism, a grinding mechanism is fixedly installed inside the working box, and the grinding mechanism runs through both sides of the working box, the grinding mechanism comprises a grinding cylinder fixedly installed inside the working box, rotating disks are rotatably installed at both ends of the grinding cylinder, a transmission assembly is rotatably installed on one side of the rotating disk, and a grinding assembly is fixedly installed between the two sets of transmission assemblies; a crushing mechanism is fixedly installed on the top of the working box, the crushing mechanism comprises a crushing box fixedly installed on the top of the working box, a crushing assembly is installed inside the crushing box through a slide rail, a spline rod is installed through the front of the crushing assembly, a speed regulating motor is fixedly installed on one end of the spline rod, and two phases are sleeved on the outer side of the spline rod. The first bevel gear is fixedly installed on one end of the spline rod, and a transmission bevel gear is fixedly installed on one side of the transmission bevel gear, and a transmission mechanism is meshed and installed on one side of the transmission bevel gear, the bottom of the transmission mechanism is transmission-connected with the bottom of the feeding mechanism, and the feeding mechanism is fixedly installed on the back of the crushing mechanism; a mixing box is fixedly installed on the bottom of the working box, and a spiral push rod is rotatably installed inside the mixing box, and a first pulley group is fixedly installed on one end of the spiral push rod, and the top of the first pulley group is connected with the outer sleeve of one end of the spline rod; the speed regulating motor drives the spline rod to rotate, and the rotating spline rod can drive the crushing assembly to work through the first bevel gear, the rotating spline rod drives the grinding mechanism to work, the rotating spline rod drives the feeding mechanism to work through the transmission mechanism, and the rotating spline rod drives the spiral push rod to rotate through the first pulley group.

[0007] Preferably, the transmission assembly includes a planetary gear rotatably mounted on one side of a rotating disk, a clamping plate is fixedly mounted on one side of the planetary gear, a clamping rod is clamped on the top of the clamping plate, a second pulley group is fixedly mounted on one end of the clamping rod, a main gear is movably sleeved on the outer side of the clamping rod, and the top of one side of the main gear is fixedly mounted on one side of the working box through a bearing frame.

[0008] Preferably, the grinding assembly comprises a rotating rod, with ball shafts fixedly mounted on both ends of the rotating rod, one side of the ball shaft being fixedly connected to one side of the planetary gear, and a grinding roller being mounted on the outer side of the rotating rod via an equidistant mounting sleeve.

[0009] Preferably, the crushing assembly includes a fixed frame fixedly mounted on one side of the crushing box, and a mobile frame movably mounted on the other side of the crushing box, and crushing rollers are rotatably mounted inside the fixed frame and the mobile frame, a second bevel gear is fixedly mounted on the front side of the crushing roller, and the second bevel gear is meshed with the first bevel gear, and a threaded rod is rotatably mounted on one side of the mobile frame, and the threaded rod passes through the crushing box and is threadedly connected.

[0010] Preferably, the two opposite first bevel gears are rotatably connected to the fixed frame and the movable frame respectively, and one end of the spline rod is fixedly connected to one side of the top of the second pulley group, a lower hopper is fixedly installed on the top of the crushing box, and hopper covers are installed on both sides of the top of the lower hopper through shafts.

[0011] Preferably, the feeding mechanism includes a feed pipe fixedly mounted on the back of the lower hopper, a spiral rod rotatably mounted inside the feed pipe, an upper hopper fixedly mounted on one side of the feed pipe, a return pipe extending to the bottom of the grinding mechanism fixedly mounted on the other side of the feed pipe, a baffle plate movably mounted on the top of the return pipe, a rack fixedly mounted on the bottom of the baffle plate, a spiral gear rod meshingly connected to the bottom of the rack, a shaft rod fixedly mounted on one end of the spiral gear rod, and one end of the shaft rod passes through the front of the mixing box and a knob fixedly mounted thereon.

[0012] Preferably, the transmission mechanism comprises a double-bevel gear rod installed on one side of the crushing box through a bearing seat, one end of the double-bevel gear rod is meshingly connected with a single-bevel gear rod, and a third pulley set is fixedly installed on the bottom end of the single-bevel gear rod.

[0013] Preferably, a controller is fixedly installed on the front of the mixing box, a discharge pipe is fixedly installed on one side of the mixing box, a pipe cover is installed on the front of the discharge pipe through a shaft bolt, a driven gear is fixedly installed on the front of the pipe cover, a servo motor is fixedly installed on the top of the discharge pipe, a driving gear is fixedly installed on the output end of the servo motor, and the bottom of the driving gear is meshed with the driven gear, and a drain valve is installed through the back of the mixing box.

[0014] Preferably, a liquid inlet is installed through one side of the top of the working box, and support frames are fixedly installed on both sides of the bottom of the working box.

[0015] A water-washing extraction process for rare earth elements in phosphogypsum, the extraction process comprising the following steps: Step 1: The spline rod is driven to rotate by a speed regulating motor, and the rotating spline rod cooperates with the transmission mechanism that is meshed and connected through the transmission bevel gear to put the phosphogypsum into the crushing mechanism for crushing; Step 2: The crushed phosphogypsum falls into the grinding mechanism through the pipeline, and the crushed phosphogypsum is ground by the grinding mechanism to make the phosphogypsum particle size finer, and the ground qualified phosphogypsum falls into the mixing box, and the refined phosphogypsum can be fully integrated with the water washing liquid; Step 3: Recover the phosphogypsum that cannot be effectively ground in the grinding process of the phosphogypsum in step 2. First, the threaded rod is rotated to move horizontally, thereby driving the moving frame to move horizontally. The horizontally moving moving frame adjusts the distance between the two sets of crushing rollers, thereby adjusting the crushing particle size, so as to finely crush the recovered phosphogypsum; Step 4: The spiral gear rod is driven to rotate by the knob shaft, and the rotating spiral gear rod drives the baffle plate to move through the meshing rack. The moving baffle plate can open the feed port of the return pipe, so that the unqualified phosphogypsum in the grinding mechanism enters the return pipe through the feed port for recycling. The recycled phosphogypsum is re-put into the crushing mechanism through the rotating spiral rod for crushing. The crushing component can be adjusted to further refine the crushing particle size of the recycled phosphogypsum, so as to facilitate the subsequent grinding of the phosphogypsum by the grinding mechanism, and the refined phosphogypsum can avoid causing the grinding mechanism to be jammed. Step 5: The washing liquid is delivered to the mixing box through the liquid inlet, and then the rotating spline rod is used to drive the spiral push rod to rotate through the first pulley group. The rotating spiral push rod disturbs the crushed phosphogypsum and the washing liquid in the mixing box, so that the phosphogypsum and the washing liquid can be fully stirred and mixed; Step six: After the rare earth element extraction is completed, the phosphogypsum in the washing liquid is precipitated, and the washing liquid containing rare earth elements is discharged through the drain valve on the back of the mixing box. Then, the discharged washing liquid containing rare earth elements is extracted to separate the washing liquid from the rare earth elements, thereby obtaining high-purity rare earth elements. After the washing liquid is discharged, the discharge pipe is opened by flipping the pipe cover, and the phosphogypsum precipitated at the bottom of the mixing box is squeezed out by a rotating spiral push rod, and the phosphogypsum is separated into solid and liquid, thereby obtaining dehydrated phosphogypsum.

[0016] Therefore, the present invention has the following beneficial effects: (1) The spline rod is driven to rotate by a speed regulating motor. The rotating spline rod drives the feeding mechanism through the transmission mechanism to transport the phosphogypsum to the crushing mechanism. The rotating spline rod can drive the crushing assembly to crush through the first bevel gear, and the crushing assembly is adjusted according to the subsequent crushing particle size requirements. The threaded rod is rotated to move horizontally in a spiral manner, thereby driving the mobile frame to move horizontally. The horizontally movable mobile frame adjusts the spacing between the two groups of crushing rollers. According to different phosphogypsum raw materials and extraction requirements, the crushing particle size is adjusted so that the phosphogypsum that is fully refined in the subsequent extraction process can be fully integrated with the water washing liquid, thereby improving the extraction rate of rare earth elements, and avoiding the problem of large phosphogypsum causing the grinding mechanism to jam the device, thereby improving the grinding efficiency of phosphogypsum and making the device adaptable to different production requirements; (2) When collecting phosphogypsum, the discharge pipe is opened by flipping the pipe cover, and the phosphogypsum precipitated at the bottom of the mixing box is pushed to the discharge pipe by a rotating spiral push rod. The phosphogypsum is squeezed and discharged by a conical discharge pipe, so that the washing liquid in the phosphogypsum is squeezed out, and the washing liquid containing rare earth elements is separated from the solid residue, so that the washing liquid containing rare earth elements is fully recovered and the dehydrated phosphogypsum is obtained, thereby avoiding the loss of rare earth elements caused by the loss of washing liquid, thereby improving the comprehensive utilization rate of phosphogypsum and the recovery rate of rare earth elements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the front structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the back side of the present invention.

[0019] Figure 3 It is a schematic diagram of the internal structure of the present invention.

[0020] Figure 4 It is a schematic diagram of the internal structure of the mixing box of the present invention.

[0021] Figure 5 It is a schematic diagram of the local structure of the discharge pipe of the present invention.

[0022] Figure 6 It is a schematic diagram of the local structure of the grinding mechanism of the present invention.

[0023] Figure 7 It is a schematic diagram of the internal structure of the grinding mechanism of the present invention.

[0024] Figure 8 It is a schematic diagram of the local structure of the transmission component of the present invention.

[0025] Fig. 9 It is a schematic diagram of the internal structure of the crushing mechanism of the present invention.

[0026] Fig.10 It is a schematic diagram of the partial structure of the crushing component of the present invention.

[0027] Fig.11 It is a schematic diagram of the connection structure between the spline rod and the first bevel gear of the present invention.

[0028] Fig.12 It is a schematic diagram of the internal structure of the feeding mechanism of the present invention.

[0029] Fig.13 It is a schematic diagram of the internal structure of the return pipe of the present invention.

[0030] In the figure: 1, working box; 101, liquid inlet; 102, support frame; 2, mixing box; 201, controller; 202, first pulley group; 203, spiral push rod; 204, discharge pipe; 205, pipe cover; 206, servo motor; 207, driving gear; 208, driven gear; 3, grinding mechanism; 301, grinding cylinder; 302, rotating disk; 303, transmission assembly; 3031, planetary gear; 3032, main gear; 3033, bearing frame; 3034, second pulley group; 3035, clamping rod; 3036, clamping plate; 304, grinding assembly; 3041, rotating rod; 3042, ball shaft; 3043, mounting bracket; 3044, Grinding roller; 4. Transmission mechanism; 401. Double bevel gear rod; 402. Single bevel gear rod; 403. Third pulley group; 5. Crushing mechanism; 501. Lower hopper; 502. Bucket cover; 503. Crushing box; 504. Speed ​​regulating motor; 505. Spline rod; 506. First bevel gear; 507. Crushing assembly; 5071. Fixed frame; 5072. Mobile frame; 5073. Crushing roller; 5074. Second bevel gear; 5075. Threaded rod; 508. Transmission bevel gear; 6. Feeding mechanism; 601. Feeding pipe; 602. Screw rod; 603. Upper hopper; 604. Return pipe; 605. Baffle plate; 606. Rack; 607. Screw gear rod; 608. Shaft rod. DETAILED DESCRIPTION

[0031] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0032] See also Figure 1-13The water-washing and extraction equipment of rare earth elements in phosphogypsum proposed by the present invention comprises a working box 1 and a feeding mechanism 6. A grinding mechanism 3 is fixedly installed inside the working box 1, and the grinding mechanism 3 runs through both sides of the working box 1. The grinding mechanism 3 comprises a grinding cylinder 301 fixedly installed inside the working box 1. Rotating disks 302 are rotatably installed at both ends of the grinding cylinder 301. A transmission assembly 303 is rotatably installed on one side of the rotating disk 302. A grinding assembly 304 is fixedly installed between the two sets of transmission assemblies 303. A crushing mechanism 5 is fixedly installed on the top of the working box 1. The crushing mechanism 5 comprises a A crushing box 503 is provided with a crushing assembly 507 installed inside the crushing box 503 through a slide rail, a spline rod 505 is installed through the front of the crushing assembly 507, a speed regulating motor 504 is fixedly installed on one end of the spline rod 505, and two opposite first bevel gears 506 are sleeved on the outer side of the spline rod 505, and a transmission bevel gear 508 is fixedly installed on one end of the spline rod 505, and a transmission mechanism 4 is meshed and installed on one side of the transmission bevel gear 508, the bottom of the transmission mechanism 4 is transmission-connected to the bottom of the feeding mechanism 6, and the feeding mechanism 6 is fixedly installed on the back of the crushing mechanism 5; the bottom of the working box 1 is fixedly installed A mixing box 2 is provided, wherein a spiral push rod 203 is rotatably installed inside the mixing box 2, a first pulley set 202 is fixedly installed at one end of the spiral push rod 203, and the top of the first pulley set 202 is connected to the outer sleeve of one end of the spline rod 505; a speed regulating motor 504 drives the spline rod 505 to rotate, and the rotating spline rod 505 can drive the crushing assembly 507 to work through the first bevel gear 506, the rotating spline rod 505 drives the grinding mechanism 3 to work, the rotating spline rod 505 drives the feeding mechanism 6 to work through the transmission mechanism 4, and the rotating spline rod 505 drives the first pulley Group 202 drives the spiral push rod 203 to rotate; it should be noted that: the speed regulating motor 504 is fixedly installed on one side of the top of the working box 1, and a protective cover is installed on the outside of the speed regulating motor 504, the protective cover is used to protect the speed regulating motor 504 from damage by external force, rain and dust, thereby ensuring the safety of the speed regulating motor 504, and the speed regulating motor 504 can control the working efficiency of the device by adjusting the speed to adapt to different production needs, the spline rod 505 runs through the crushing box 503, and the extending end of the spline rod 505 is fixedly installed with a spline end, and the outer side of the spline end is connected to the top sleeve of the first pulley group 202.

[0033] See also Figure 6-8The transmission assembly 303 includes a planetary gear 3031 rotatably mounted on one side of the rotating disk 302, a clamping plate 3036 is fixedly mounted on one side of the planetary gear 3031, a clamping rod 3035 is clamped on the top of the clamping plate 3036, a second pulley set 3034 is fixedly mounted on one end of the clamping rod 3035, a main gear 3032 is movably sleeved on the outer side of the clamping rod 3035, and the top of one side of the main gear 3032 is fixedly mounted on one side of the working box 1 through a bearing frame 3033; it should be noted that: the rotating disk 302 rotates with the planetary gear 3031 when it rotates, and the bearing frame 3033 fixes the main gear 3032 to ensure that the main gear 3032 does not rotate and its position is not affected, thereby improving the meshing accuracy between the planetary gear 3031 and the main gear 3032.

[0034] See also Figure 6-8 The grinding assembly 304 includes a rotating rod 3041, both ends of which are fixedly mounted with ball shafts 3042, and one side of the ball shaft 3042 is fixedly connected to one side of the planetary gear 3031, and a grinding roller 3044 is mounted on the outer side of the rotating rod 3041 through an equidistant mounting sleeve 3043; it should be noted that the rotating rod 3041 is composed of a sleeve rod and a telescopic rod, and can be telescopically moved during the rotation of the rotating rod 3041, and can be tilted and rotated at a certain angle in conjunction with the ball shaft 3042, so that when the grinding roller 3044 passes through phosphogypsum with a larger particle size, it can pass through at an angle to avoid the grinding roller 3044 from getting stuck, thereby ensuring the grinding efficiency of the grinding roller 3044.

[0035] See also Figure 9-11 The crushing assembly 507 includes a fixed frame 5071 fixedly installed on one side of the crushing box 503, and a mobile frame 5072 movably installed on the other side of the crushing box 503. Crushing rollers 5073 are rotatably installed inside the fixed frame 5071 and the mobile frame 5072. A second bevel gear 5074 is fixedly installed on the front of the crushing roller 5073, and the second bevel gear 5074 is meshed and connected with the first bevel gear 506. A threaded rod 5075 is rotatably installed on one side of the mobile frame 5072, and the threaded rod 5075 penetrates the crushing box 503 and is threadedly connected. It should be noted that: a rotating handle is fixedly installed on one end of the threaded rod 5075, and the rotating handle drives the threaded rod 5075 to rotate and move in a threaded manner. The threaded rod 5075 that rotates and moves in a threaded manner drives the mobile frame 5072 to move horizontally. The horizontally movable mobile frame 5072 adjusts the spacing between the two sets of crushing rollers 5073, and the crushing particle size of the phosphogypsum is adjusted by adjusting the spacing between the two sets of crushing rollers 5073.

[0036] See also Figure 10-11, the two relative first bevel gears 506 are rotatably connected to the fixed frame 5071 and the mobile frame 5072 respectively, and one end of the spline rod 505 is fixedly connected to one side of the top of the second pulley group 3034, and a lower hopper 501 is fixedly installed on the top of the crushing box 503, and a bucket cover 502 is installed on both sides of the top of the lower hopper 501 through shafts; it should be noted that: the two relative first bevel gears 506 are meshed and connected with the second bevel gear 5074 respectively, and under the rotation force of the spline rod 505, the two relative first bevel gears 506 respectively drive the two groups of crushing rollers 5073 to rotate relative to each other through the meshed second bevel gear 5074, and the relatively rotating crushing rollers 5073 can squeeze and crush the phosphogypsum, and the bucket cover 502 can be used to provide safety protection for the phosphogypsum inside the lower hopper 501 when it is crushed, so as to avoid splashing of phosphogypsum and ensure the safety of the crushing mechanism 5 during crushing operation.

[0037] See also Figure 12-13 The feeding mechanism 6 includes a feeding pipe 601 fixedly mounted on the back of the lower hopper 501, a spiral rod 602 is rotatably mounted inside the feeding pipe 601, an upper hopper 603 is fixedly mounted on one side of the feeding pipe 601, a return pipe 604 extending to the bottom of the grinding mechanism 3 is fixedly mounted on the other side of the feeding pipe 601, a baffle plate 605 is movably mounted on the top of the return pipe 604, a rack 606 is fixedly mounted on the bottom of the baffle plate 605, a spiral gear rod 607 is meshed and connected at the bottom of the rack 606, a shaft rod 608 is fixedly mounted on one end of the spiral gear rod 607, and one end of the shaft rod 608 passes through the front of the mixing box 2 and is fixedly mounted with a knob; it should be noted that: the rotating third pulley group 403 drives the screw rod 602 to rotate, and the rotating screw rod 602 puts the phosphogypsum into the upper hopper 603. The rotating screw rod 602 spirally lifts the phosphogypsum in the upper hopper 603 to the crushing mechanism 5, and drives the shaft rod 608 by rotating the knob. The rotating shaft rod 608 drives the spiral gear rod 607 to rotate. The rotating spiral gear rod 607 drives the baffle plate 605 to move through the meshing rack 606. The moving baffle plate 605 can open the feed port of the return pipe 604, and the unqualified phosphogypsum inside the grinding mechanism 3 enters the return pipe 604 through the feed port. The return pipe 604 has an inclination angle, which can transport the collected unqualified phosphogypsum to the bottom of the screw rod 602.

[0038] See also Figure 1 , Fig. 9 , Fig.12The transmission mechanism 4 includes a double-bevel gear rod 401 installed on one side of the crushing box 503 through a bearing seat, one end of the double-bevel gear rod 401 is meshedly connected with the single-bevel gear rod 402, and the bottom end of the single-bevel gear rod 402 is fixedly installed with a third pulley group 403; it should be noted that: one end of the double-bevel gear rod 401 is meshedly connected with the transmission bevel gear 508, and the other end is meshedly connected with the top of the single-bevel gear rod 402, and the single-bevel gear rod 402 is installed on one side of the mixing box 2 through a bearing seat, and the transmission bevel gear 508 transmits the rotational power of the spline rod 505 to the double-bevel gear rod 401, and the double-bevel gear rod 401 transmits the rotational power to the third pulley group 403 through the meshed single-bevel gear rod 402, so that the third pulley group 403 drives the spiral rod 602 to rotate.

[0039] See also Figure 1-5 A controller 201 is fixedly installed on the front of the mixing box 2, a discharge pipe 204 is fixedly installed on one side of the mixing box 2, a pipe cover 205 is installed on the front of the discharge pipe 204 through a shaft bolt, a driven gear 208 is fixedly installed on the front of the pipe cover 205, a servo motor 206 is fixedly installed on the top of the discharge pipe 204, a driving gear 207 is fixedly installed on the output end of the servo motor 206, and the lower part of the driving gear 207 is meshed and connected with the driven gear 208, and a drain valve is installed through the back of the mixing box 2; it should be noted that: the controller 201 is electrically connected to the servo motor 206 and the speed regulating motor 504 through a wire, so that the staff can control the operation of the device, and the discharge pipe 204 is a conical structure. When the phosphogypsum passes through the discharge pipe 204, the discharge space becomes smaller, thereby squeezing and dehydrating the phosphogypsum.

[0040] See also Figure 1-3 A liquid inlet 101 is installed through one side of the top of the working box 1, and support frames 102 are fixedly installed on both sides of the bottom of the working box 1; it should be noted that: the liquid inlet 101 is opened to transport water washing liquid into the mixing box 2, and the water washing liquid falls into the mixing box 2 after passing through the grinding cylinder 301. The use of water washing liquid to flush the grinding cylinder 301 can effectively clean the adhered phosphogypsum, avoid clogging of the holes in the grinding cylinder 301, ensure the circulation rate of phosphogypsum, and then improve the grinding efficiency of phosphogypsum, and the support frame 102 can support the working box 1 to ensure the stability of the overall placement of the device.

[0041] A water-washing extraction process for rare earth elements in phosphogypsum comprises the following steps: Step 1: The spline rod is driven to rotate by a speed regulating motor, and the rotating spline rod cooperates with the transmission mechanism meshing with the transmission bevel gear to put the phosphogypsum into the crushing mechanism for crushing; Step 2: The crushed phosphogypsum falls into the grinding mechanism through the pipeline, and the crushed phosphogypsum is ground by the grinding mechanism to make the phosphogypsum particle size finer, and the ground qualified phosphogypsum falls into the mixing box 2, and the refined phosphogypsum can be fully integrated with the water wash liquid; Step 3: The phosphogypsum that cannot be effectively ground in the grinding process of the phosphogypsum in step 2 is recovered. First, the threaded rod 5075 is rotated to move horizontally in a spiral manner, thereby driving the movable frame 5072 to move horizontally. The movable frame 5072 that moves horizontally adjusts the distance between the two sets of crushing rollers 5073, thereby adjusting the crushing particle size, so as to finely crush the recovered phosphogypsum; Step 4: The spiral gear rod 607 is driven to rotate by the knob shaft 608, and the rotating spiral gear rod 607 drives the baffle plate 605 to move through the meshing rack 606. The moving baffle plate 605 can open the feed port of the return pipe 604, so that the unqualified phosphogypsum in the grinding mechanism 3 enters the return pipe 604 through the feed port for recycling, and the recycled phosphogypsum is re-put into the crushing mechanism 5 for crushing through the rotating spiral rod 602, and the crushing component 507 can be further refined to further refine the crushing particle size of the recycled phosphogypsum, so as to facilitate the subsequent grinding of the phosphogypsum by the grinding mechanism 3, and the refined phosphogypsum can avoid causing the grinding mechanism 3 to be jammed; Step 5: The washing liquid is delivered to the mixing box 2 through the liquid inlet 101, and then the rotating spline rod 505 drives the spiral push rod 203 to rotate through the first pulley group 202. The rotating spiral push rod 203 disturbs the crushed phosphogypsum and the washing liquid in the mixing box 2, so that the phosphogypsum and the washing liquid can be fully stirred and mixed; Step six: After the rare earth element extraction is completed, the phosphogypsum in the washing liquid is precipitated, and the washing liquid containing rare earth elements is discharged through the drain valve on the back of the mixing box 2, and then the discharged washing liquid containing rare earth elements is extracted to separate the washing liquid and the rare earth elements, thereby obtaining high-purity rare earth elements. After the washing liquid is discharged, the discharge pipe 204 is opened by flipping the pipe cover 205, and the phosphogypsum precipitated at the bottom of the mixing box 2 is squeezed out by the rotating spiral push rod 203, and the phosphogypsum is separated into solid and liquid, thereby obtaining dehydrated phosphogypsum.

[0042] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. A device for extracting rare earth elements from phosphogypsum by washing, comprising a working box (1) and a feeding mechanism (6), characterized in that: A grinding mechanism (3) is fixedly installed inside the working box (1), and the grinding mechanism (3) runs through both sides of the working box (1). The grinding mechanism (3) comprises a grinding cylinder (301) fixedly installed inside the working box (1), rotating disks (302) are rotatably installed at both ends of the grinding cylinder (301), a transmission assembly (303) is rotatably installed on one side of the rotating disk (302), and a grinding assembly (304) is fixedly installed between the two sets of transmission assemblies (303); a crushing assembly (304) is fixedly installed on the top of the working box (1). The crushing mechanism (5) comprises a crushing box (503) fixedly mounted on the top of the working box (1), a crushing assembly (507) being mounted inside the crushing box (503) via a slide rail, a spline rod (505) being installed through the front of the crushing assembly (507), a speed regulating motor (504) being fixedly mounted on one end of the spline rod (505), two first bevel gears (506) being opposite to each other being sleeved on the outer side of the spline rod (505), and a transmission bevel gear (506) being fixedly mounted on one end of the spline rod (505). 8), a transmission mechanism (4) is meshedly mounted on one side of the transmission bevel gear (508), the bottom of the transmission mechanism (4) is transmission-connected to the bottom of the feeding mechanism (6), and the feeding mechanism (6) is fixedly mounted on the back of the crushing mechanism (5); a mixing box (2) is fixedly mounted on the bottom of the working box (1), a spiral push rod (203) is rotatably mounted inside the mixing box (2), a first belt pulley group (202) is fixedly mounted on one end of the spiral push rod (203), and the top of the first belt pulley group (202) is connected to the spline rod The outer ferrule at one end of the spline rod (505) is connected; the speed regulating motor (504) drives the spline rod (505) to rotate, and the rotating spline rod (505) can drive the crushing component (507) to work through the first bevel gear (506), the rotating spline rod (505) drives the grinding mechanism (3) to work, the rotating spline rod (505) drives the feeding mechanism (6) to work through the transmission mechanism (4), and the rotating spline rod (505) drives the spiral push rod (203) to rotate through the first pulley group (202).

2. The water washing and extraction equipment for rare earth elements in phosphogypsum according to claim 1, characterized in that: The transmission assembly (303) comprises a planetary gear (3031) rotatably mounted on one side of the rotating disk (302); a clamping plate (3036) is fixedly mounted on one side of the planetary gear (3031); a clamping rod (3035) is clamped on the top of the clamping plate (3036); a second pulley set (3034) is fixedly mounted on one end of the clamping rod (3035); a main gear (3032) is movably sleeved on the outer side of the clamping rod (3035); and the top of one side of the main gear (3032) is fixedly mounted on one side of the working box (1) via a bearing frame (3033).

3. The water washing and extraction equipment for rare earth elements in phosphogypsum according to claim 2, characterized in that: The grinding assembly (304) comprises a rotating rod (3041), ball shafts (3042) are fixedly mounted on both ends of the rotating rod (3041), one side of the ball shaft (3042) is fixedly connected to one side of the planetary gear (3031), and a grinding roller (3044) is mounted on the outer side of the rotating rod (3041) via an equidistant mounting sleeve (3043).

4. The equipment for washing and extracting rare earth elements from phosphogypsum according to claim 1, characterized in that: The crushing assembly (507) comprises a fixed frame (5071) fixedly mounted on one side of the crushing box (503), and a movable frame (5072) movably mounted on the other side of the crushing box (503); a crushing roller (5073) is rotatably mounted inside the fixed frame (5071) and the movable frame (5072); a second bevel gear (5074) is fixedly mounted on the front side of the crushing roller (5073), and the second bevel gear (5074) is meshedly connected to the first bevel gear (506); a threaded rod (5075) is rotatably mounted on one side of the movable frame (5072), and the threaded rod (5075) penetrates the crushing box (503) and is threadedly connected.

5. The equipment for extracting rare earth elements from phosphogypsum by washing according to claim 1, characterized in that: The two opposite first bevel gears (506) are rotatably connected to the fixed frame (5071) and the movable frame (5072), respectively, and one end of the spline rod (505) is fixedly connected to one side of the top of the second pulley group (3034). A lower hopper (501) is fixedly installed on the top of the crushing box (503), and hopper covers (502) are installed on both sides of the top of the lower hopper (501) through shafts.

6. The equipment for extracting rare earth elements from phosphogypsum by washing according to claim 5, characterized in that: The feeding mechanism (6) comprises a feeding pipe (601) fixedly mounted on the back of the lower hopper (501), a spiral rod (602) rotatably mounted inside the feeding pipe (601), an upper hopper (603) fixedly mounted on one side of the feeding pipe (601), a return pipe (604) extending to the bottom of the grinding mechanism (3) fixedly mounted on the other side of the feeding pipe (601), a baffle plate (605) movably mounted on the top of the return pipe (604), a rack (606) fixedly mounted on the bottom of the baffle plate (605), a spiral gear rod (607) meshingly connected to the bottom of the rack (606), a shaft rod (608) fixedly mounted on one end of the spiral gear rod (607), and a knob fixedly mounted on one end of the shaft rod (608) passing through the front of the mixing box (2).

7. The equipment for extracting rare earth elements from phosphogypsum by washing according to claim 1, characterized in that: The transmission mechanism (4) comprises a double-bevel gear rod (401) mounted on one side of the crushing box (503) via a bearing seat, one end of the double-bevel gear rod (401) is meshingly connected with a single-bevel gear rod (402), and a third pulley set (403) is fixedly mounted on the bottom end of the single-bevel gear rod (402).

8. The equipment for extracting rare earth elements from phosphogypsum by washing according to claim 1, characterized in that: A controller (201) is fixedly mounted on the front of the mixing box (2); a discharge pipe (204) is fixedly mounted on one side of the mixing box (2); a pipe cover (205) is mounted on the front of the discharge pipe (204) via a shaft bolt; a driven gear (208) is fixedly mounted on the front of the pipe cover (205); a servo motor (206) is fixedly mounted on the top of the discharge pipe (204); a driving gear (207) is fixedly mounted on the output end of the servo motor (206); and the lower part of the driving gear (207) is meshedly connected with the driven gear (208); and a liquid discharge valve is installed through the back of the mixing box (2).

9. The equipment for washing and extracting rare earth elements from phosphogypsum according to claim 1, characterized in that: A liquid inlet (101) is installed through one side of the top of the working box (1), and support frames (102) are fixedly installed on both sides of the bottom of the working box (1).

10. A process for extracting rare earth elements from phosphogypsum by water washing using the equipment for extracting rare earth elements from phosphogypsum as claimed in any one of claims 1 to 9, characterized in that: The steps include: Step 1: The spline rod (505) is driven to rotate by the speed regulating motor (504), and the rotating spline rod (505) cooperates with the transmission mechanism (4) meshing with the transmission bevel gear (508) to put the phosphogypsum into the crushing mechanism (5) for crushing; Step 2: The crushed phosphogypsum falls into the grinding mechanism (3) through a pipeline, and the crushed phosphogypsum is ground by the grinding mechanism (3) to make the phosphogypsum particle size finer, and the ground qualified phosphogypsum falls into the mixing box (2), and the refined phosphogypsum can be fully mixed with the water washing liquid; Step 3: The phosphogypsum that cannot be effectively ground in the grinding process of the phosphogypsum in step 2 is recovered. First, the threaded rod (5075) is rotated to move horizontally in a spiral manner, thereby driving the movable frame (5072) to move horizontally. The horizontally movable movable frame (5072) adjusts the distance between the two sets of crushing rollers (5073), thereby adjusting the crushing particle size, so as to finely crush the recovered phosphogypsum; Step 4: The spiral gear rod (607) is driven to rotate by the knob shaft (608), and the rotating spiral gear rod (607) drives the baffle plate (605) to move through the meshing rack (606). The moving baffle plate (605) can open the feed port of the return pipe (604), so that the unqualified phosphogypsum in the grinding mechanism 3 enters the return pipe 604 through the feed port for recycling. The recycled phosphogypsum is re-introduced into the crushing mechanism (5) for crushing through the rotating spiral rod 602, and the crushing component (507) can be further refined to further refine the crushing particle size of the recycled phosphogypsum, so as to facilitate the subsequent grinding of the phosphogypsum by the grinding mechanism (3), and the refined phosphogypsum can avoid causing the grinding mechanism (3) to be blocked; Step 5: conveying the washing liquid to the mixing box (2) through the liquid inlet (101), and then using the rotating spline rod (505) to drive the spiral push rod (203) to rotate through the first pulley group (202), so that the rotating spiral push rod (203) disturbs the crushed phosphogypsum and the washing liquid inside the mixing box (2), so that the phosphogypsum and the washing liquid can be fully stirred and mixed; Step 6: After the rare earth element extraction is completed, the phosphogypsum in the washing liquid is precipitated, and the washing liquid containing the rare earth elements is discharged through the drain valve on the back of the mixing box (2). Then, the discharged washing liquid containing the rare earth elements is extracted to separate the washing liquid from the rare earth elements, thereby obtaining high-purity rare earth elements. After the washing liquid is discharged, the discharge pipe (204) is opened by flipping the pipe cover (205), and the phosphogypsum precipitated at the bottom of the mixing box (2) is squeezed out by a rotating spiral push rod (203), and the phosphogypsum is separated into solid and liquid, thereby obtaining dehydrated phosphogypsum.

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