A continuous rare earth fluorination furnace

Abstract

The present invention relates to the field of rare earth fluorination technology, and in particular to a continuous rare earth fluorination furnace, comprising a base plate, a support plate, a storage box, and a cover plate, wherein the base plate is connected to the top of the base plate, the support plate is connected to the storage box for storing rare earth oxides, and the cover plate is hingedly connected to the top of the storage box. In the present invention, the output shaft of a stepper motor can drive a cam plate to rotate, so that the cam plate no longer pushes the sealing plate, and the sealing plate no longer seals the discharge box and the discharge cylinder. The rare earth oxides in the discharge box fall into the fluorination furnace body for loading, and the fluorinated rare earth in the fluorination furnace body falls into a rotating cylinder for discharge. Both loading and discharge are performed automatically, and the operation is more continuous, thereby improving work efficiency. The heat of the fluorinated rare earth can heat a heat-conducting liquid, and the heat of the fluorinated rare earth is recycled to avoid heat loss.

Description

Technical Field

[0001] The present invention relates to the technical field of rare earth fluorination, in particular to a continuous rare earth fluorination furnace. Background Art

[0002] Rare earth fluorination furnace is a device used to process rare earth elements and their compounds. It is mainly used to fluorinate rare earth oxides. This process is very important in rare earth metallurgy and material preparation because many rare earth applications need to exist in the form of fluorides, such as in optical glass, magnetic materials and other fields.

[0003] The rare earth fluorination furnace provides a high-temperature environment in which rare earth oxides and fluorination gas react chemically to fluorinate the rare earth oxides. After the fluorination treatment is completed, the fluorinated rare earth is directly discharged from the rare earth fluorination furnace. Heat cannot be recovered during discharge, which easily causes heat loss. Secondly, the rare earth fluorination furnace is opened manually each time and rare earth oxides are added. After the fluorination treatment is completed, the rare earth fluorination furnace is opened manually each time and the fluorinated rare earth is discharged. During the loading and discharging period, the rare earth fluorination furnace is temporarily stopped, which affects the continuity of the work and thus reduces the overall work efficiency. Summary of the Invention

[0004] In view of this, the present invention provides a continuous rare earth fluorination furnace, which can overcome the disadvantages that the rare earth after fluorination treatment is directly discharged from the rare earth fluorination furnace, the heat cannot be recovered during discharge, and heat loss is easily caused. Each time, the rare earth fluorination furnace is opened manually and then the rare earth after fluorination treatment is discharged. During the loading and discharging period, the rare earth fluorination furnace is temporarily stopped, which affects the continuity of the work and thus reduces the overall work efficiency.

[0005] The technical solution of the present invention is: a continuous rare earth fluorination furnace, comprising a bottom plate, a support plate, a storage box, a cover plate, a discharge box, a mounting frame, a mounting plate, a fluorination furnace body, a discharge barrel, an air inlet pipe, a solenoid valve, a recovery mechanism and an opening and closing mechanism. The top of the bottom plate is connected to the support plate, and the support plate is connected to a storage box for storing rare earth oxides. The top of the storage box is hinged with a cover plate, and the bottom of the storage box is connected to the discharge box. The top of the bottom plate is connected to the mounting frame, and the top of the mounting frame is connected to the mounting plate. The fluorination furnace body is installed on the mounting plate. The discharge box and the fluorination furnace body are connected and communicated. The rare earth oxides in the storage box fall into the fluorination furnace body through the discharge box for fluorination treatment. The bottom of the fluorination furnace body is connected to the discharge barrel, and the discharge barrel is connected to the mounting frame. The top of the fluorination furnace body is connected to the air inlet pipe, and the air inlet pipe is installed with a solenoid valve. The recovery mechanism is used to recycle the heat of the rare earth after fluorination treatment, and the opening and closing mechanism is used to control the opening and closing of the discharge box and the discharge barrel.

[0006] Furthermore, the recovery mechanism includes a vertical plate, a first outer cylinder, a rotating cylinder, a sealing cover, a connecting block, a second outer cylinder, an annular box, a first water pump, a first liquid guide tube, a second water pump, a second liquid guide tube and a rotating assembly. The top of the bottom plate is connected to the vertical plate, the top of the vertical plate is connected to the first outer cylinder, the first outer cylinder is rotatably and sealably connected to the rotating cylinder, the rotating cylinder and the discharging cylinder are rotatably and sealably connected, there is an interlayer between the rotating cylinder and the first outer cylinder, the interlayer between the rotating cylinder and the first outer cylinder is filled with heat-conducting liquid, a sealing cover is hinged on the rotating cylinder, the bottom of the rotating cylinder and the bottom of the sealing cover are both connected to the connecting block, the two connecting blocks are connected by bolts, the outside of the discharging box is connected to the second outer cylinder, there is an interlayer between the discharging box and the second outer cylinder, the interlayer between the discharging box and the second outer cylinder is filled with heat-conducting liquid, the first Drain ports are evenly spaced circumferentially at the lower parts of the two outer cylinders, an annular box is connected to the lower part of the second outer cylinder, a first water pump is installed on the top of the bottom plate, the water inlet end of the first water pump is connected to the bottom of the first outer cylinder, and the water inlet end of the first water pump is communicated with the interlayer between the rotating cylinder and the first outer cylinder, a first liquid guide pipe is connected to the water outlet end of the first water pump, the first liquid guide pipe is connected to the second outer cylinder, and the first liquid guide pipe is communicated with the interlayer between the discharge box and the second outer cylinder, a second water pump is installed on the top of the fluorination furnace body, the water inlet end of the second water pump is communicated with the annular box, a second liquid guide pipe is connected to the water outlet end of the second water pump, the lower end of the second liquid guide pipe is connected to the top of the first outer cylinder, and the second liquid guide pipe is communicated with the interlayer between the discharge box and the second outer cylinder, and the rotating assembly is used to drive the rotating cylinder to rotate.

[0007] Furthermore, the rotating assembly includes a ring gear, a servo motor and a gear. The ring gear is installed on the rotating cylinder, the servo motor is installed on the top of the first outer cylinder, and the output shaft of the servo motor is connected to a gear, and the gear and the ring gear are meshed.

[0008] Furthermore, the opening and closing mechanism includes a sealing box, a sealing plate, a contact wheel, a telescopic rod, a spring, a stepper motor and a cam plate. The lower part of the discharge box and the upper part of the discharge cylinder are connected to the sealing box. The sealing box is slidably connected with a sealing plate for sealing the discharge box and the discharge cylinder. The sealing plates are provided with discharge holes. The sealing plates are rotatably connected with contact wheels. The sealing plates are connected with telescopic rods. The telescopic rods are connected to the mounting plate. A spring is connected between the mounting plate and the sealing plate. The stepper motor is installed on the support plate. The output shaft of the stepper motor is connected to the cam plate. The front side of the cam plate is a vertical surface, and the upper and lower sides of the right side of the cam plate are inclined surfaces.

[0009] Furthermore, it also includes a circulation mechanism, which includes a connecting frame, a cylinder, a cylinder cover, a connecting plate, a fan, a first air duct, a second air duct and a filter assembly. The support plate is connected to the connecting frame, the cylinder is connected to the connecting frame, the cylinder cover is hinged on the cylinder, the cylinder and the cylinder cover are both connected to the connecting plate, the two connecting plates are connected by bolts, a fan is installed at the bottom of the cylinder, the bottom of the fan is connected to the first air duct, the first air duct is connected and communicated with the fluorination furnace body, the top of the cylinder is connected to the second air duct, the second air duct is connected and communicated with the fluorination furnace body, the fan blows air into the fluorination furnace body through the first air duct, the fluorinated gas in the fluorination furnace body enters the cylinder through the second air duct, and the filter assembly is used to filter dust in the fluorination gas.

[0010] Furthermore, the filter assembly includes an arc-shaped plate, a mounting ring and a dust filter bag. The inside of the cylinder and the upper part of the cylinder cover are connected to the arc-shaped plates. The two arc-shaped plates are in contact with each other. The mounting rings are placed on the top of the two arc-shaped plates. The bottom of the mounting ring is connected to a dust filter bag for filtering dust in the fluorinated gas.

[0011] Furthermore, it also includes an anti-blocking mechanism, which includes a first stirring paddle and a first stirring motor. The first stirring paddle is rotatably connected to the top of the storage box, and the first stirring paddle extends into the discharge box. The first stirring motor is installed on the top of the storage box, and the output shaft of the first stirring motor is connected to the first stirring paddle to drive the first stirring paddle to rotate, and the first stirring paddle stirs the rare earth oxides in the discharge box.

[0012] Furthermore, it also includes a stirring mechanism, which includes a second stirring paddle and a second stirring motor. The second stirring paddle is rotatably connected to the top of the fluorination furnace body, and the second stirring motor is installed on the top of the fluorination furnace body. The output shaft of the second stirring motor is connected to the second stirring paddle to drive the second stirring paddle to rotate, and the second stirring paddle stirs the rare earth oxides in the fluorination furnace body.

[0013] The present invention has the following advantages:

[0014] 1. The present invention can drive the cam plate to rotate through the output shaft of the stepping motor, so that the cam plate no longer pushes the sealing plate, and the sealing plate no longer seals the discharge box and the discharge cylinder. The rare earth oxides in the discharge box fall into the fluorination furnace body for loading, and the rare earth after fluorination treatment in the fluorination furnace body falls into the rotating cylinder for discharge. The loading and discharging are both carried out automatically, and the operation is more continuous, thereby improving work efficiency. The heat of the rare earth after fluorination treatment can heat the heat-conducting liquid, and the heat of the rare earth after fluorination treatment can be recycled to avoid heat loss.

[0015] 2. Air can be blown into the fluorination furnace body through the fan, and the fluorination gas in the fluorination furnace body enters the cylinder through the second air duct, and then the fluorination gas in the cylinder flows back into the fluorination furnace body through the first air duct. The fluorination gas flows in the fluorination furnace body, which can make the fluorination gas and rare earth oxides fully contact, accelerate the reaction rate, shorten the reaction time, and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the discharge box, mounting frame, mounting plate, fluorination furnace body and discharge barrel of the present invention.

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the air intake pipe and the solenoid valve of the present invention.

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the recovery mechanism of the present invention.

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the rotating cylinder, sealing cover and connecting block of the present invention.

[0021] Figure 6 It is a cross-sectional view of the annular box of the present invention.

[0022] Figure 7 It is a schematic diagram of the three-dimensional structure of the first water pump, the first liquid guiding tube, the second water pump and the second liquid guiding tube of the present invention.

[0023] Figure 8 It is a schematic diagram of the three-dimensional structure of the ring gear, servo motor and gear of the present invention.

[0024] Figure 9 It is a schematic diagram of the three-dimensional structure of the opening and closing mechanism of the present invention.

[0025] Figure 10 It is a cross-sectional view of the sealing box of the present invention.

[0026] Figure 11 It is a schematic diagram of the three-dimensional structure of the cam plate, vertical surface and inclined surface of the present invention.

[0027] Figure 12 This is a state diagram of the cam disc of the present invention after rotating 90 degrees counterclockwise.

[0028] Figure 13 This is a state diagram of the cam disc of the present invention after rotating 180 degrees counterclockwise.

[0029] Figure 14 This is a state diagram of the cam disc of the present invention after rotating 270 degrees counterclockwise.

[0030] Figure 15 It is a schematic diagram of the three-dimensional structure of the telescopic rod and the spring of the present invention.

[0031] Figure 16 This is a schematic diagram of the first three-dimensional structure of the circulation mechanism of the present invention.

[0032] Figure 17 This is a schematic diagram of the second three-dimensional structure of the circulation mechanism of the present invention.

[0033] Figure 18 This is a state diagram of the cylinder cover of the present invention after it is opened.

[0034] Figure 19 It is a schematic diagram of the three-dimensional structure of the anti-blocking mechanism of the present invention.

[0035] Figure 20 It is a schematic diagram of the three-dimensional structure of the stirring mechanism of the present invention.

[0036] The reference numbers in the figure are: 1. bottom plate, 2. support plate, 3. storage box, 4. cover plate, 5. discharge box, 6. mounting frame, 7. mounting plate, 8. fluorination furnace body, 9. discharge cylinder, 10. air inlet pipe, 11. solenoid valve, 12. vertical plate, 13. first outer cylinder, 14. rotating cylinder, 15. sealing cover, 16. connecting block, 17. second outer cylinder, 18. drain port, 19. annular box, 20. first water pump, 21. first liquid guide tube, 22. second water pump, 23. second liquid guide tube, 24. gear ring, 25. servo motor, 26. Gear, 27, sealing box, 28, sealing plate, 29, discharge hole, 30, contact wheel, 31, telescopic rod, 32, spring, 33, stepping motor, 34, cam plate, 35, vertical surface, 36, inclined surface, 37, connecting frame, 38, cylinder, 39, cylinder cover, 40, connecting plate, 41, fan, 42, first air duct, 43, second air duct, 44, curved plate, 45, mounting ring, 46, dust filter bag, 47, first stirring paddle, 48, first stirring motor, 49, second stirring paddle, 50, second stirring motor. DETAILED DESCRIPTION

[0037] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0038] See also Figures 1-15A continuous rare earth fluorination furnace includes a bottom plate 1, a support plate 2, a storage box 3, a cover plate 4, a discharge box 5, a mounting frame 6, a mounting plate 7, a fluorination furnace body 8, a discharge cylinder 9, an air inlet pipe 10, a solenoid valve 11, a recovery mechanism and an opening and closing mechanism. The top rear side of the bottom plate 1 is connected to the support plate 2 by bolts, the upper front side of the support plate 2 is connected to the storage box 3 by bolts, the top front side of the storage box 3 is hinged with the cover plate 4, the bottom of the storage box 3 is connected to the discharge box 5, the top middle of the bottom plate 1 is connected to the mounting frame 6 by bolts, and the top middle of the mounting frame 6 is connected to the A mounting plate 7 is connected with bolts, and a fluorination furnace body 8 is installed on the front side of the mounting plate 7 by bolts. The bottom of the discharge box 5 is connected to the top of the fluorination furnace body 8, and the discharge box 5 and the fluorination furnace body 8 are communicated. The bottom of the fluorination furnace body 8 is connected with a discharge cylinder 9, and the discharge cylinder 9 is connected to the front side of the mounting frame 6. The top front side of the fluorination furnace body 8 is connected with an air inlet pipe 10, and an electromagnetic valve 11 is installed on the air inlet pipe 10. The recovery mechanism is used to recycle the heat of the rare earth after fluorination treatment, and the opening and closing mechanism is used to control the opening and closing of the discharge box 5 and the discharge cylinder 9.

[0039] See also Figure 4-Figure 8The recovery mechanism includes a vertical plate 12, a first outer cylinder 13, a rotating cylinder 14, a sealing cover 15, a connecting block 16, a second outer cylinder 17, an annular box 19, a first water pump 20, a first liquid guide tube 21, a second water pump 22, a second liquid guide tube 23 and a rotating assembly. The left and right sides of the front top of the bottom plate 1 are connected to the vertical plate 12 by bolts. The tops of the two vertical plates 12 are connected to the first outer cylinder 13 by bolts. The rotating cylinder 14 is rotatably sealed in the first outer cylinder 13. The rear side of the rotating cylinder 14 and the discharge cylinder 9 are connected. The front side is rotated and sealed, there is an interlayer between the rotating cylinder 14 and the first outer cylinder 13, the interlayer between the rotating cylinder 14 and the first outer cylinder 13 is filled with heat-conducting liquid, the front side of the rotating cylinder 14 is hinged with a sealing cover 15, the front side of the bottom of the rotating cylinder 14 and the bottom of the sealing cover 15 are connected with a connecting block 16, the two connecting blocks 16 are connected by bolts, the outside of the discharge box 5 is connected to the second outer cylinder 17, there is an interlayer between the discharge box 5 and the second outer cylinder 17, the interlayer between the discharge box 5 and the second outer cylinder 17 is filled with heat-conducting liquid, the second The lower part of the outer cylinder 17 is evenly spaced with drainage ports 18. The lower part of the second outer cylinder 17 is connected to an annular box 19. The first water pump 20 is installed on the front side of the top of the bottom plate 1 by bolts. The water inlet end of the first water pump 20 is connected to the bottom of the first outer cylinder 13, and the water inlet end of the first water pump 20 is connected to the interlayer between the rotating cylinder 14 and the first outer cylinder 13. The water outlet end of the first water pump 20 is connected to the first liquid guide pipe 21, which is connected to the right side of the second outer cylinder 17, and the first liquid guide pipe 21 is connected to the discharge box 5 and The interlayer between the second outer cylinder 17 is connected, and a second water pump 22 is installed on the left side of the top of the fluorination furnace body 8 by bolts. The water inlet end of the second water pump 22 is connected to the bottom of the annular box 19, and the water inlet end of the second water pump 22 is connected to the annular box 19. The water outlet end of the second water pump 22 is connected to a second liquid guide pipe 23, the lower end of the second liquid guide pipe 23 is connected to the top of the first outer cylinder 13, and the second liquid guide pipe 23 is connected to the interlayer between the discharge box 5 and the second outer cylinder 17. The rotating assembly is used to drive the rotating cylinder 14 to rotate.

[0040] See also Figure 8 The rotating assembly includes a ring gear 24, a servo motor 25 and a gear 26. The ring gear 24 is installed on the rear of the rotating cylinder 14 by bolts, and the servo motor 25 is installed on the rear side of the top of the first outer cylinder 13 by bolts. The output shaft of the servo motor 25 is connected to the gear 26 by a key, and the gear 26 is engaged with the ring gear 24.

[0041] See also Figures 9-15The opening and closing mechanism includes a sealing box 27, a sealing plate 28, a contact wheel 30, a telescopic rod 31, a spring 32, a stepping motor 33 and a cam plate 34. The lower part of the discharge box 5 and the upper part of the discharge cylinder 9 are connected to the sealing box 27. The sealing box 27 is slidably connected with the sealing plate 28. The front part of the sealing plate 28 is provided with a discharge hole 29. The rear side of the sealing plate 28 is rotatably connected to the contact wheel 30. The rear side of the sealing plate 28 is connected to two telescopic rods 31. The front end of the telescopic rod 31 is connected to the rear side of the mounting plate 7. The two telescopic rods 31 on the same sealing plate 28 are connected to the rear side of the mounting plate 7. 1 is arranged opposite to each other on the left and right sides, and the sealing plate 28 is guided by two telescopic rods 31 to improve the stability of the sealing plate 28. A spring 32 is sleeved on the telescopic rod 31, and the two ends of the spring 32 are respectively connected to the mounting plate 7 and the sealing plate 28. The spring 32 is sleeved on the telescopic rod 31 to prevent the spring 32 from bending. A stepper motor 33 is installed in the middle of the support plate 2 by bolts, and a cam plate 34 is connected to the output shaft of the stepper motor 33. The front side of the cam plate 34 is a vertical surface 35, and the upper and lower sides of the right side of the cam plate 34 are inclined surfaces 36.

[0042] Initially, the vertical surface 35 of the cam disc 34 contacts the contact wheel 30, the cam disc 34 pushes the contact wheel 30, the discharge box 5 and the discharge cylinder 9 are staggered with the discharge hole 29, the sealing plate 28 seals the discharge box 5 and the discharge cylinder 9, and the spring 32 is in a compressed state; the staff opens the cover 4, and then pours the rare earth oxide into the storage box 3, the rare earth oxide will fall into the discharge box 5, the sealing plate 28 seals the discharge box 5, so the rare earth oxide in the discharge box 5 will not fall into the fluorination furnace body 8, the staff closes the cover 4 again, and then controls the output shaft of the stepping motor 33 to rotate 90 degrees counterclockwise, driving the cam disc 34 to rotate 90 degrees counterclockwise, the vertical surface 35 of the cam disc 34 will be out of contact with the upper contact wheel 30, and the cam disc 34 no longer pushes the upper The contact wheel 30, under the action of the upper spring 32, the upper sealing plate 28 moves backward, the upper telescopic rod 31 extends, the upper discharge hole 29 will correspond to the discharge box 5, the upper sealing plate 28 no longer seals the discharge box 5, and the rare earth oxides in the discharge box 5 fall into the fluorination furnace body 8 through the upper discharge hole 29 for loading. At this time, the vertical surface 35 of the cam disc 34 is still in contact with the lower contact wheel 30, and the lower sealing plate 28 still seals the discharge cylinder 9. When the fluorination furnace body 8 is filled with enough rare earth oxides, the output shaft of the stepping motor 33 is controlled to rotate counterclockwise 90 degrees again, driving the cam disc 34 to continue to rotate counterclockwise 90 degrees, and the inclined surface 36 of the cam disc 34 will contact the upper contact wheel 30. 4 can push the upper contact wheel 30 to move forward, driving the upper sealing plate 28 to move forward, the upper spring 32 is compressed, the upper telescopic rod 31 is shortened, the upper discharge hole 29 and the discharge box 5 are staggered, and the upper sealing plate 28 reseals the discharge box 5. At this time, the vertical surface 35 of the cam plate 34 is still in contact with the lower contact wheel 30, and the lower sealing plate 28 still seals the discharge barrel 9. Then the staff connects the air inlet pipe 10 to the fluorination gas, and then controls the solenoid valve 11 to open. The fluorination gas enters the fluorination furnace body 8 through the air inlet pipe 10. When the fluorination furnace body 8 is filled with sufficient fluorination gas, the solenoid valve 11 is controlled to close. The fluorination furnace body 8 heats the rare earth oxide, and the rare earth oxide and fluorination gas are heated in the fluorination furnace body 8. A chemical reaction occurs inside the furnace to fluorinate the rare earth oxides. After the fluorination treatment is completed, the output shaft of the stepper motor 33 is controlled to rotate 90 degrees counterclockwise again, driving the cam plate 34 to continue to rotate 90 degrees counterclockwise. The vertical surface 35 of the cam plate 34 will be out of contact with the contact wheel 30 below. The cam plate 34 no longer pushes the contact wheel 30 below. Under the action of the spring 32 below, the sealing plate 28 below moves backward, the telescopic rod 31 below extends, and the discharge hole 29 below corresponds to the discharge cylinder 9. The sealing plate 28 below no longer seals the discharge cylinder 9. The fluorinated rare earth in the fluorination furnace body 8 falls into the rotating cylinder 14 through the discharge cylinder 9 for discharge. At this time, the vertical surface 35 of the cam plate 34 is still in contact with the contact wheel 30 above.The upper sealing plate 28 still seals the discharge box 5. After all the rare earth elements in the fluorination furnace body 8 that have been fluorinated are discharged into the rotating cylinder 14, the output shaft of the stepping motor 33 is controlled to rotate 90 degrees counterclockwise again, driving the cam plate 34 to continue to rotate 90 degrees counterclockwise. The inclined surface 36 of the cam plate 34 will contact the contact wheel 30 below. The cam plate 34 can push the contact wheel 30 below to move forward, driving the lower sealing plate 28 to move forward. The lower spring 32 is compressed, the lower telescopic rod 31 is shortened, the lower discharge hole 29 and the discharge cylinder 9 are staggered, and the lower sealing plate 28 seals the discharge cylinder 9 again. At this time, the vertical position of the cam plate 34 is The straight surface 35 is still in contact with the contact wheel 30 above, and the sealing plate 28 above still seals the discharge box 5. Repeat the above operation, load again, and continue to fluorinate the rare earth oxide. The loading and discharging are all performed automatically, and the operation is more continuous, which can improve the work efficiency. At this time, the rare earth after fluorination is in the rotating cylinder 14. The heat of the rare earth after fluorination is conducted to the interlayer between the rotating cylinder 14 and the first outer cylinder 13, heating the heat-conducting liquid in the interlayer between the rotating cylinder 14 and the first outer cylinder 13. The temperature of the rare earth after fluorination gradually decreases, and the output shaft of the servo motor 25 can drive the gear 26 to rotate. The gear 26 drives the gear ring 24 to rotate, and the gear ring 24 drives the rotating cylinder 14 to rotate, so that the rare earth after fluorination treatment in the rotating cylinder 14 moves, so that the heat of the rare earth after fluorination treatment can be better dissipated. The first water pump 20 can suck the heat-conducting liquid in the interlayer between the rotating cylinder 14 and the first outer cylinder 13 into the first liquid guide pipe 21, and the heat-conducting liquid flows into the interlayer between the discharge box 5 and the second outer cylinder 17 through the first liquid guide pipe 21. The heat of the heat-conducting liquid can preheat the rare earth oxides in the discharge box 5, shorten the heating time of the rare earth oxides in the fluorination furnace body 8, further improve the working efficiency, and at the same time, can preheat the rare earth oxides in the fluorination furnace body 8. The heat of the treated rare earths is recycled to avoid heat loss. The heat-conducting liquid in the interlayer between the discharge box 5 and the second outer cylinder 17 flows into the annular box 19 through the drain port 18. The second water pump 22 can suck the heat-conducting liquid in the annular box 19 into the second liquid conduit 23. The heat-conducting liquid flows through the second liquid conduit 23 into the interlayer between the rotating cylinder 14 and the first outer cylinder 13. The heat-conducting liquid circulates in the two interlayers, keeping the heat-conducting liquid at a high temperature and ensuring the heating effect of the heat-conducting liquid. After the fluorinated rare earths have cooled, the two connecting blocks 16 are disassembled, and then the sealing cover 15 is opened to discharge the fluorinated rare earths.

[0043] See also Figure 16-18, also includes a circulation mechanism, the circulation mechanism includes a connecting frame 37, a cylinder 38, a cylinder cover 39, a connecting plate 40, a fan 41, a first air duct 42, a second air duct 43 and a filter assembly, the left front side of the support plate 2 is connected to two connecting frames 37 by bolts, the two connecting frames 37 are arranged opposite to each other up and down, the front sides of the two connecting frames 37 are commonly connected to the cylinder 38 by bolts, the front side of the cylinder 38 is hinged with a cylinder cover 39, the left side of the cylinder 38 and the left side of the cylinder cover 39 are both connected to the connecting plate 40 The two connecting plates 40 are connected by bolts, and a fan 41 is installed at the bottom of the cylinder 38 by bolts. The bottom of the fan 41 is connected to a first air duct 42, and the first air duct 42 is connected to the top of the fluorination furnace body 8, and the first air duct 42 is connected to the fluorination furnace body 8. The top of the cylinder 38 is connected to a second air duct 43, and the second air duct 43 is connected to the top of the fluorination furnace body 8, and the second air duct 43 is connected to the fluorination furnace body 8. The filter assembly is used to filter dust in the fluorination gas.

[0044] See also Figure 18 The filter assembly includes an arc-shaped plate 44, a mounting ring 45 and a dust filter bag 46. The upper rear part of the inner rear side of the cylinder 38 and the upper rear part of the cylinder cover 39 are connected to the arc-shaped plate 44 by bolts. The two arc-shaped plates 44 are in contact with each other. The mounting ring 45 is placed on the top of the two arc-shaped plates 44, and the dust filter bag 46 is connected to the bottom of the mounting ring 45.

[0045] The fan 41 blows air into the fluorination furnace body 8 through the first air duct 42. The fluorinated gas in the fluorination furnace body 8 enters the cylinder 38 through the second air duct 43. The fluorinated gas will pass through the dust filter bag 46. The dust filter bag 46 can filter the dust in the fluorination gas to prevent the dust from entering the fan 41 and causing damage to the fan 41. Then the fluorinated gas in the cylinder 38 flows back to the fluorination furnace body 8 through the first air duct 42. The fluorinated gas flows in the fluorination furnace body 8, which can make the fluorination gas and rare earth oxides fully contact, accelerate the reaction rate, shorten the reaction time, and improve work efficiency. The two connecting plates 40 are disassembled, and then the cylinder cover 39 is opened to remove the dust filter bag 46 for replacement.

[0046] See also Figure 19 , also includes an anti-blocking mechanism, the anti-blocking mechanism includes a first stirring paddle 47 and a first stirring motor 48, the top of the storage box 3 is rotatably connected to the first stirring paddle 47, the first stirring paddle 47 extends into the discharge box 5, the top of the storage box 3 is installed with a first stirring motor 48 by bolts, the output shaft of the first stirring motor 48 and the upper end of the first stirring paddle 47 are connected by a coupling, the output shaft of the first stirring motor 48 can drive the first stirring paddle 47 to rotate, the first stirring paddle 47 can stir the rare earth oxides in the discharge box 5, and ensure that the rare earth oxides in the discharge box 5 can fall smoothly into the fluorination furnace body 8.

[0047] See also Figure 20 , also includes a stirring mechanism, the stirring mechanism includes a second stirring paddle 49 and a second stirring motor 50, the top of the fluorination furnace body 8 is rotatably connected to the second stirring paddle 49, the top of the fluorination furnace body 8 is installed with a second stirring motor 50 by bolts, the output shaft of the second stirring motor 50 and the upper end of the second stirring paddle 49 are connected by a coupling, the output shaft of the second stirring motor 50 can drive the second stirring paddle 49 to rotate, the second stirring paddle 49 can stir the rare earth oxides in the fluorination furnace body 8, so that the rare earth oxides in the fluorination furnace body 8 are in motion, so that the fluorination gas and the rare earth oxides can fully contact, accelerate the reaction rate, shorten the reaction time, and improve work efficiency.

[0048] The above description is merely an example of the present invention and is not intended to limit the present invention. Any equivalent substitutions made within the principles of the present invention are intended to be included within the scope of protection of the present invention. Any content not elaborated in detail herein is already known to those skilled in the art.

Claims

1. A continuous rare earth fluorination furnace, comprising a bottom plate (1), a support plate (2), a storage box (3) and a cover plate (4), wherein the top of the bottom plate (1) is connected to the support plate (2), the support plate (2) is connected to the storage box (3) for storing rare earth oxides, and the top of the storage box (3) is hinged to the cover plate (4), characterized in that: It also includes a discharge box (5), a mounting frame (6), a mounting plate (7), a fluorination furnace body (8), a discharge cylinder (9), an air inlet pipe (10), a solenoid valve (11), a recovery mechanism and an opening and closing mechanism. The bottom of the storage box (3) is connected to the discharge box (5), the top of the bottom plate (1) is connected to the mounting frame (6), the top of the mounting frame (6) is connected to the mounting plate (7), the fluorination furnace body (8) is installed on the mounting plate (7), the discharge box (5) and the fluorination furnace body (8) are connected and communicated, the storage box ( 3) The rare earth oxides in the fluorination furnace body (8) fall into the fluorination furnace body (8) through the discharge box (5) for fluorination treatment. The bottom of the fluorination furnace body (8) is connected to a discharge cylinder (9), which is connected to the mounting frame (6). The top of the fluorination furnace body (8) is connected to an air inlet pipe (10), and an electromagnetic valve (11) is installed on the air inlet pipe (10). The recovery mechanism is used to recycle the heat of the rare earth after the fluorination treatment, and the opening and closing mechanism is used to control the opening and closing of the discharge box (5) and the discharge cylinder (9); The opening and closing mechanism includes a sealing box (27), a sealing plate (28), a contact wheel (30), a telescopic rod (31), a spring (32), a stepping motor (33) and a cam plate (34). The lower part of the discharge box (5) and the upper part of the discharge cylinder (9) are both connected to the sealing box (27). The sealing box (27) is slidably connected with a sealing plate (28) for sealing the discharge box (5) and the discharge cylinder (9). The sealing plate (28) is provided with a discharge hole (29). A contact wheel (30) is rotatably connected to each of the two support plates (28). A telescopic rod (31) is connected to each of the two support plates (28). The telescopic rod (31) is connected to the mounting plate (7). A spring (32) is connected between the mounting plate (7) and the sealing plate (28). A stepper motor (33) is mounted on the support plate (2). A cam disc (34) is connected to the output shaft of the stepper motor (33). The front side of the cam disc (34) is a vertical surface (35). The upper and lower sides of the right side of the cam disc (34) are both inclined surfaces (36). The invention also includes a circulation mechanism, which includes a connecting frame (37), a cylinder (38), a cylinder cover (39), a connecting plate (40), a fan (41), a first air guide pipe (42), a second air guide pipe (43) and a filter assembly. The support plate (2) is connected to the connecting frame (37), the connecting frame (37) is connected to the cylinder (38), the cylinder (38) is hinged with a cylinder cover (39), the cylinder (38) and the cylinder cover (39) are both connected to a connecting plate (40), the two connecting plates (40) are connected by bolts, and the bottom of the cylinder (38) is installed with a A fan (41) is connected to a first air guide pipe (42) at the bottom of the fan (41), the first air guide pipe (42) is connected and communicated with the fluorination furnace body (8), the top of the cylinder (38) is connected to a second air guide pipe (43), the second air guide pipe (43) is connected and communicated with the fluorination furnace body (8), the fan (41) blows air into the fluorination furnace body (8) through the first air guide pipe (42), the fluorinated gas in the fluorination furnace body (8) enters the cylinder (38) through the second air guide pipe (43), and the filter assembly is used to filter dust in the fluorination gas.

2. A continuous rare earth fluorination furnace according to claim 1, characterized in that: The recovery mechanism includes a vertical plate (12), a first outer cylinder (13), a rotating cylinder (14), a sealing cover (15), a connecting block (16), a second outer cylinder (17), an annular box (19), a first water pump (20), a first liquid guide tube (21), a second water pump (22), a second liquid guide tube (23) and a rotating assembly. The top of the bottom plate (1) is connected to the vertical plate (12), the top of the vertical plate (12) is connected to the first outer cylinder (13), the first outer cylinder (13) is connected to the rotating cylinder (14) in a rotating seal, and the rotating cylinder (14) and the discharge cylinder (9) rotate. The rotating cylinder (14) and the first outer cylinder (13) are sealed and connected. There is an interlayer between the rotating cylinder (14) and the first outer cylinder (13). The interlayer between the rotating cylinder (14) and the first outer cylinder (13) is filled with heat-conducting liquid. A sealing cover (15) is hinged on the rotating cylinder (14). The bottom of the rotating cylinder (14) and the bottom of the sealing cover (15) are both connected with a connecting block (16). The two connecting blocks (16) are connected by bolts. The discharge box (5) is externally connected to the second outer cylinder (17). There is an interlayer between the discharge box (5) and the second outer cylinder (17). The interlayer between the discharge box (5) and the second outer cylinder (17) is filled with heat-conducting liquid. The heat-conducting liquid is filled, and the lower part of the second outer cylinder (17) is uniformly spaced with drain ports (18) in the circumferential direction. The lower part of the second outer cylinder (17) is connected to an annular box (19). A first water pump (20) is installed on the top of the bottom plate (1). The water inlet end of the first water pump (20) is connected to the bottom of the first outer cylinder (13), and the water inlet end of the first water pump (20) is communicated with the interlayer between the rotating cylinder (14) and the first outer cylinder (13). The water outlet end of the first water pump (20) is connected to a first liquid guide pipe (21), and the first liquid guide pipe (21) is connected to the second outer cylinder (17). The first liquid guide tube (21) is connected to the interlayer between the discharge box (5) and the second outer cylinder (17); a second water pump (22) is installed on the top of the fluorination furnace body (8); the water inlet end of the second water pump (22) is connected to the annular box (19); the water outlet end of the second water pump (22) is connected to the second liquid guide tube (23); the lower end of the second liquid guide tube (23) is connected to the top of the first outer cylinder (13); and the second liquid guide tube (23) is connected to the interlayer between the discharge box (5) and the second outer cylinder (17); and the rotating assembly is used to drive the rotating cylinder (14) to rotate.

3. A continuous rare earth fluorination furnace according to claim 2, characterized in that: The rotating assembly comprises a ring gear (24), a servo motor (25) and a gear (26); the ring gear (24) is mounted on the rotating cylinder (14); the servo motor (25) is mounted on the top of the first outer cylinder (13); the output shaft of the servo motor (25) is connected to the gear (26); the gear (26) and the ring gear (24) are meshed.

4. A continuous rare earth fluorination furnace according to claim 3, characterized in that: The filter assembly includes a curved plate (44), a mounting ring (45) and a dust filter bag (46). The interior of the cylinder (38) and the upper part of the cylinder cover (39) are both connected with the curved plate (44). The two curved plates (44) are in contact with each other. The mounting ring (45) is placed on the top of the two curved plates (44). The bottom of the mounting ring (45) is connected to a dust filter bag (46) for filtering dust in the fluorinated gas.

5. A continuous rare earth fluorination furnace according to claim 4, characterized in that: The invention also includes an anti-blocking mechanism, which includes a first stirring paddle (47) and a first stirring motor (48). The top of the storage box (3) is rotatably connected to the first stirring paddle (47), and the first stirring paddle (47) extends into the discharge box (5). The top of the storage box (3) is equipped with a first stirring motor (48). The output shaft of the first stirring motor (48) is connected to the first stirring paddle (47) to drive the first stirring paddle (47) to rotate. The first stirring paddle (47) stirs the rare earth oxide in the discharge box (5).

6. A continuous rare earth fluorination furnace according to claim 5, characterized in that: The invention also includes a stirring mechanism, which includes a second stirring paddle (49) and a second stirring motor (50). The second stirring paddle (49) is rotatably connected to the top of the fluorination furnace body (8). The second stirring motor (50) is installed on the top of the fluorination furnace body (8). The output shaft of the second stirring motor (50) is connected to the second stirring paddle (49) to drive the second stirring paddle (49) to rotate. The second stirring paddle (49) stirs the rare earth oxide in the fluorination furnace body (8).

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