Energy-saving rare earth smelting kiln

Abstract

This invention provides an energy-saving rare earth smelting kiln including a support platform; its key feature is that it also includes an energy-saving system; the rear of the support platform is connected to an energy-saving system for recovering heat from the inner tube. Before unloading from the inner tube, this invention pre-exhausts hot air, using the energy in the hot air to preheat the rare earth material to be fed, effectively achieving energy savings. Simultaneously, the protrusions of the filter intercept powdery substances in the hot air, achieving filtration and preventing dust from subsequently being released into the atmosphere and causing air pollution. A cleaning rod is used to clean the powder on the filter, thoroughly scraping off the powder from the protrusions and effectively preventing secondary powder adhesion. During rare earth unloading, the rare earth is screened, and a sieve is used to separate non-compliant agglomerated rare earth. Finally, a sorter and a discharge box are used as extrusion blocks, combined with the continuous rotation of the crushing roller, to crush the agglomerated rare earth, achieving uniform discharge.

Description

Technical Field

[0001] This invention relates to the field of rare earth smelting, and in particular to an energy-saving rare earth smelting kiln. Background Technology

[0002] Rotary kilns, as crucial equipment in rare earth smelting, often encounter the problem of rare earth agglomeration during the smelting process. This is largely due to the large temperature difference between the high humidity of the rare earth initially entering the high-temperature environment during the kiln's rotation, leading to agglomeration. The uneven heating rate between the inner and outer layers of the agglomerate results in uneven heating of the rare earth within the kiln. Furthermore, existing rotary kilns release large amounts of hot air directly into the atmosphere upon startup, and the smelting process generates numerous small dust particles that mix with the hot air, causing air pollution during discharge. Moreover, agglomeration during discharge severely impacts the subsequent use of rare earth and hinders the loading of powdered rare earth materials. Summary of the Invention

[0003] To overcome the drawbacks of rotary kilns, such as large amounts of hot air being directly released into the atmosphere when they are turned on, and the generation of many small dust particles mixed in with the hot air during rare earth smelting, which pollutes the air during discharge and causes rare earth agglomeration, this invention provides an energy-saving rare earth smelting kiln.

[0004] The technical solution of this invention is as follows: An energy-saving rare earth smelting kiln includes a support platform, annular guide rails, an outer tube, an inner tube, a first toothed ring, a first power motor, a first flat gear, and a discharge box; two annular guide rails are fixedly connected to the support platform, and the two annular guide rails are inclined; the two annular guide rails are rotatably connected to the same outer tube; an inner tube is fixedly connected inside the outer tube; a first toothed ring is fixedly connected to the outer surface of the outer tube; a first power motor is installed in the middle of the support platform; a first flat gear is fixedly connected to the output shaft of the first power motor; the first flat gear meshes with the first toothed ring; a discharge box is rotatably connected to the left side of the inner tube; the discharge box is fixedly connected to the support platform; it also includes a sealing mechanism, a feeding mechanism, an energy-saving system, and a sorting system; a sealing mechanism for sealing the inner tube is installed on the discharge box; a feeding mechanism is installed on the right side of the support platform; the inner tube is rotatably connected to the feeding mechanism; an energy-saving system for recovering heat inside the inner tube is connected to the rear of the support platform; the feeding mechanism is connected to the energy-saving system.

[0005] The unloading box is connected to a sorting system for unified sorting of rare earth elements.

[0006] More preferably, the sealing mechanism includes a fixed frame, a hydraulic cylinder, a sealing door, and an electric rotator; the fixed frame is fixedly connected to the left side of the unloading box; the hydraulic cylinder is fixedly connected to the fixed frame; the sealing door is fixedly connected to the telescopic part of the hydraulic cylinder; and the electric rotator is installed on the sealing door.

[0007] More preferably, the feeding mechanism includes an insulated box, a feeding pipe, a second power motor, and a screw feeder; the insulated box is fixedly connected to the right side of the support platform; the feeding pipe is fixedly connected inside the insulated box; the second power motor is fixedly connected to the right side of the insulated box; and the screw feeder is fixedly connected to the output shaft of the second power motor.

[0008] More preferably, the energy-saving system includes a first air guide pipe, a solenoid valve, a filter pipe, an electric fan, a filter, an annular electric slide rail, an electric rotator, a cleaning rod, and a second air guide pipe; the first air guide pipe is fixedly connected to the upper part of the unloading box; the solenoid valve is installed on the first air guide pipe; the filter pipe is fixedly connected to the rear of the support platform; an electric fan is installed on the left and right sides inside the filter pipe; a filter is installed in the middle of the filter pipe; an annular electric slide rail is fixedly connected to the bend of the filter pipe; an electric rotator is slidably connected inside each annular electric slide rail; two cleaning rods are fixedly connected between two electric rotators; the second air guide pipe is fixedly connected to the right side of the filter pipe; the second air guide pipe is fixedly connected to the insulation box.

[0009] More preferably, the filter tube is smaller at both ends and larger in the middle, thus having two bends.

[0010] More preferably, the left side of the filter is sealed, and a vent is provided on the outer side of the left side. The filter is used in conjunction with the filter tube to form a filtration direction from the outside to the middle.

[0011] More preferably, the outer surface of the filter is provided with several raised strips, and the filter screen and adsorbent material are disposed on the raised strips.

[0012] More preferably, the sorting system includes a sorter, a third power motor, a second spur gear, a carrier, a second gear ring, levers, a fixing ring, a crushing roller, and a third spur gear; the sorter is installed inside the unloading box; the third power motor is fixedly connected to the fixed frame; the output shaft of the third power motor is fixedly connected to the second spur gear; the carrier is rotatably connected to the middle of the unloading box; the second gear ring is fixedly connected to the outer surface of the carrier; several levers are fixedly connected to the carrier; several levers are fixedly connected to the same fixing ring; the fixing ring is rotatably connected to the unloading box; the crushing roller is rotatably connected inside the unloading box; the third spur gear is fixedly connected to the left side of the crushing roller; the second spur gear meshes with the second gear ring; the second spur gear meshes with the third spur gear.

[0013] More preferably, the sorter has filter holes at the bottom and an open structure at the top.

[0014] More preferably, the lever has a V-shaped structure.

[0015] Beneficial effects: This invention pre-exhausts hot air before unloading from the inner tube, using the energy in the hot air to preheat the rare earth material to be loaded, effectively achieving energy saving. At the same time, the convex strips of the filter intercept powdery substances in the hot air, achieving filtration and preventing dust from being discharged into the atmosphere and causing air pollution. Meanwhile, the cleaning rod cleans the powder on the filter, thoroughly scraping off the powder on the convex strips of the filter, effectively preventing secondary adhesion of powder.

[0016] In the process of unloading rare earth materials, the present invention screens the rare earth materials and uses a lever to screen out agglomerated rare earth materials that do not meet the specifications. Finally, a sorter and a discharge box are used as extrusion blocks, which, together with the continuous rotation of the crushing roller, crush the agglomerated rare earth materials and complete the uniform discharge. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the first angle structure of the rare earth smelting kiln of the present invention;

[0018] Figure 2 This is a schematic diagram of the second angle structure of the rare earth smelting kiln of the present invention;

[0019] Figure 3 This is a cross-sectional view of the rare earth smelting kiln of the present invention.

[0020] Figure 4 This is a cross-sectional view of the energy-saving system of the present invention;

[0021] Figure 5 This is a three-dimensional structural diagram of the filter of the present invention;

[0022] Figure 6 This is a cross-sectional view of the sorting system of the present invention;

[0023] Figure 7 This is a partial structural cross-sectional view of the sorting system of the present invention;

[0024] Figure 8 This is a schematic diagram of some parts of the sorting system of the present invention.

[0025] The components in the diagram are labeled as follows: 1-Bearing platform, 2-Annular guide rail, 301-Outer tube, 302-Inner tube, 4-First gear ring, 5-First power motor, 6-First flat gear, 7-Unloading box, 8-Fixing frame, 9-Hydraulic cylinder, 10-Sealing door, 11-Electric rotator, 12-Insulation box, 13-Feeding pipe, 14-Second power motor, 15-Screw feeder, 16-First air guide pipe, 17-Solenoid valve, 18-Filter pipe, 19-Electric fan, 20-Filter, 21-Annular electric slide rail, 22-Electric rotator, 23-Cleaning rod, 24-Second air guide pipe, 25-Sorter, 26-Third power motor, 27-Second flat gear, 28-Bearing device, 29-Second gear ring, 30-Pulley, 31-Fixing ring, 32-Crushing roller, 33-Third flat gear. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but this does not limit the scope of protection and application of the present invention.

[0027] Example

[0028] An energy-saving rare earth smelting kiln, such as Figure 1-8 As shown, the system includes a support platform 1, annular guide rails 2, an outer tube 301, an inner tube 302, a first gear ring 4, a first power motor 5, a first spur gear 6, and a discharge box 7. Two annular guide rails 2 are fixedly connected to the support platform 1, and the two annular guide rails 2 are inclined. The two annular guide rails 2 are rotatably connected to the same outer tube 301. An inner tube 302 is fixedly connected inside the outer tube 301. A first gear ring 4 is fixedly connected to the outer surface of the outer tube 301. A first power motor 5 is installed in the middle of the support platform 1. A first spur gear 6 is fixedly connected to the output shaft of the first power motor 5. The first spur gear 6 meshes with the first gear ring 4. A discharge box 7 is rotatably connected to the left side of the inner tube 302. The discharge box 7 is fixedly connected to the support platform 1.

[0029] It also includes a sealing mechanism, a feeding mechanism, an energy-saving system, and a sorting system; the sealing mechanism is installed on the unloading box 7; the feeding mechanism is installed on the right side of the support platform 1; the inner tube 302 is rotatably connected to the feeding mechanism; the energy-saving system is connected to the rear of the support platform 1; the feeding mechanism is connected to the energy-saving system. The sorting system is connected to the unloading box 7.

[0030] The sealing mechanism includes a fixed frame 8, a hydraulic cylinder 9, a sealing door 10, and an electric rotator 11; the fixed frame 8 is fixedly connected to the left side of the unloading box 7; the hydraulic cylinder 9 is fixedly connected to the fixed frame 8; the sealing door 10 is fixedly connected to the telescopic part of the hydraulic cylinder 9; and the electric rotator 11 is installed on the sealing door 10.

[0031] The feeding mechanism includes an insulation box 12, a feeding pipe 13, a second power motor 14, and a screw feeder 15; the insulation box 12 is fixedly connected to the right side of the support platform 1; the feeding pipe 13 is fixedly connected inside the insulation box 12; the second power motor 14 is fixedly connected to the right side of the insulation box 12; the screw feeder 15 is fixedly connected to the output shaft of the second power motor 14.

[0032] The energy-saving system includes a first air guide pipe 16, a solenoid valve 17, a filter pipe 18, an electric fan 19, a filter 20, an annular electric slide rail 21, an electric rotator 22, a cleaning rod 23, and a second air guide pipe 24. The first air guide pipe 16 is fixedly connected to the upper part of the unloading box 7. The solenoid valve 17 is installed on the first air guide pipe 16. The filter pipe 18 is fixedly connected to the rear part of the support platform 1. An electric fan 19 is installed on the left and right sides inside the filter pipe 18. A filter 20 is installed in the middle of the filter pipe 18. An annular electric slide rail 21 is fixedly connected to the bend of the filter pipe 18. An electric rotator 22 is slidably connected inside each annular electric slide rail 21. Two cleaning rods 23 are fixedly connected between two electric rotators 22. The second air guide pipe 24 is fixedly connected to the right side of the filter pipe 18. The second air guide pipe 24 is fixedly connected to the insulation box 12.

[0033] The filter tube 18 is small at both ends and large in the middle, thus having two bends.

[0034] The left side of the filter 20 is sealed, and a vent is provided on the outer side of the left side. The filter 20 is used in conjunction with the filter tube 18 to form a filtration direction from the outside to the middle.

[0035] The outer surface of the filter 20 is provided with several raised strips, and the filter screen and adsorption material are arranged on the raised strips.

[0036] The sorting system includes a sorter 25, a third power motor 26, a second spur gear 27, a carrier 28, a second gear ring 29, a lever 30, a fixing ring 31, a crushing roller 32, and a third spur gear 33. The sorter 25 is installed inside the unloading box 7. The third power motor 26 is fixedly connected to the fixed frame 8. The output shaft of the third power motor 26 is fixedly connected to the second spur gear 27. The carrier 28 is rotatably connected to the middle of the unloading box 7. The second gear ring 29 is fixedly connected to the outer surface of the carrier 28. Several levers 30 are fixedly connected to the carrier 28. Several levers 30 are fixedly connected to the same fixing ring 31. The fixing ring 31 is rotatably connected to the unloading box 7. The crushing roller 32 is rotatably connected inside the unloading box 7. The third spur gear 33 is fixedly connected to the left side of the crushing roller 32. The second spur gear 27 meshes with the second gear ring 29. The second spur gear 27 meshes with the third spur gear 33.

[0037] The sorter 25 has a filter hole at the bottom and an open structure at the top.

[0038] The lever 30 has a V-shaped structure.

[0039] This energy-saving rare earth smelting kiln has a double-layer design with an outer tube 301 and an inner tube 302, which effectively protects the heat and prevents heat loss, providing a more stable thermal environment for smelting. At the same time, the continuous rotation of the smelting kiln comes from the continuous meshing of the first gear ring 4 and the first flat gear 6, and the rotation power is provided by the first power motor 5.

[0040] After the smelting time reaches the preset time, the rare earth material inside the inner tube 302 needs to be unloaded. At this time, the electric rotary device 11 on the pre-controlled sealing door 10 is activated, and the preset hole on the sealing door 10 is opened. At this time, the hot air inside the inner tube 302 will flow out from the preset hole. The two electric fans 19 on the filter tube 18 are started, and the solenoid valve 17 on the first air guide tube 16 is opened at the same time. At this time, the hot air inside the inner tube 302 enters the filter tube 18 from the first air guide tube 16. Then, the hot air enters the space formed with the filter tube 18 through the vent on the left side of the filter 20. Since the hot air will carry powder formed during rare earth smelting, and traditional filter devices are prone to clogging and have extremely poor cleaning effect, the filter device needs to be replaced frequently in a relatively closed environment. Moreover, the powder particles in the hot air are small and difficult to clean. Therefore, when the hot air passes through the filter 20, the powder is intercepted on the convex strips of the filter 20, and then the hot air... The gas is transferred to the second gas guide pipe 24 and finally concentrated in the space between the insulation box 12 and the feeding pipe 13. The heat from the hot gas heats the feeding pipe 13, preheating the rare earth. The height of the insulation box 12 is not only the length mentioned in this embodiment, but can also cover the temporary storage position of the rare earth box, making full use of the heat discharged from the inner pipe 302 to preheat the rare earth and achieve energy saving. The feeding operation is to directly fill the inside of the feeding pipe 13, and then start the second power motor 14 to drive the screw feeder 15 to rotate to achieve feeding. After the hot gas is collected, the electric rotator 22 is controlled to rotate on the corresponding annular electric slide rail 21. At this time, the cleaning rod 23 in the middle of the two electric rotators 22 makes a circular motion. The cleaning rod 23 cleans the powder on the filter 20, thoroughly scraping off the powder on the convex strips of the filter 20, and effectively avoiding secondary adhesion of powder.

[0041] After pre-collecting heat, the rare earth in the inner tube 302 needs to be unloaded. At this time, the hydraulic cylinder 9 is operated, moving the sealing door 10 into the unloading box 7. The inner tube 302, driven by the outer tube 301, unloads the rare earth, which enters the separator 25. Rare earth that meets the specifications falls directly onto the inner wall of the unloading box 7. Then, the third power motor 26 is operated, its output shaft driving the second spur gear 27 to rotate. The second spur gear 27 drives the second gear ring 29, which in turn drives the carrier 28 to rotate. The carrier 28 then drives its three levers 30 to rotate in a circular motion. The levers 30 engage with the separator 25, pushing out rare earth that meets the specifications. While crushing the soil, the agglomerated rare earth is pushed out. Since the lever 30 is V-shaped, it is blocked by the inner wall of the separator 25 during rotation. When the agglomerated rare earth moves to the upper opening of the separator 25, it falls directly into the range of the separator 25 and the unloading box 7 because the lever 30 is inclined at the bearing part. The second spur gear 27 drives the third spur gear 33, which drives the crushing roller 32 to rotate. The crushing roller 32 is positioned on the side of the center of the separator 25 and the unloading box 7, so the agglomerated rare earth has enough space to be carried. Then, the separator 25 and the unloading box 7 are used as extrusion blocks to crush the agglomerated rare earth, which is then discharged uniformly from the unloading box 7.

[0042] The lever 30 has a V-shaped structure.

[0043] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An energy-saving rare earth smelting kiln, comprising a support platform (1), annular guide rails (2), an outer tube (301), an inner tube (302), a first gear ring (4), a first power motor (5), a first spur gear (6), and a discharge box (7); two annular guide rails (2) are fixedly connected to the support platform (1), and the two annular guide rails (2) are inclined; the two annular guide rails (2) are rotatably connected to the same outer tube (301); the inner tube (302) is fixedly connected inside the outer tube (301); the first gear ring (4) is fixedly connected to the outer surface of the outer tube (301); the first power motor (5) is installed in the middle of the support platform (1); the first spur gear (6) is fixedly connected to the output shaft of the first power motor (5); the first spur gear (6) meshes with the first gear ring (4); the discharge box (7) is rotatably connected to the left side of the inner tube (302); the discharge box (7) is fixedly connected to the support platform (1); characterized in that: It also includes a sealing mechanism, a feeding mechanism, an energy-saving system, and a sorting system; a sealing mechanism for sealing the inner tube (302) is installed on the unloading box (7); a feeding mechanism is installed on the right side of the support platform (1); the inner tube (302) is rotatably connected to the feeding mechanism; an energy-saving system for recovering heat inside the inner tube (302) is connected to the rear of the support platform (1); the feeding mechanism is connected to the energy-saving system; a sorting system for uniformly sorting rare earth is connected to the unloading box (7); The feeding mechanism includes an insulated box (12), a feeding pipe (13), a second power motor (14), and a screw feeder (15); the insulated box (12) is fixedly connected to the right side of the support platform (1); the feeding pipe (13) is fixedly connected inside the insulated box (12); the second power motor (14) is fixedly connected to the right side of the insulated box (12); the screw feeder (15) is fixedly connected to the output shaft of the second power motor (14). The energy-saving system includes a first air guide pipe (16), a solenoid valve (17), a filter pipe (18), an electric fan (19), a filter (20), a ring-shaped electric slide rail (21), an electric rotator (22), a cleaning rod (23), and a second air guide pipe (24); the first air guide pipe (16) is fixedly connected to the upper part of the unloading box (7); a solenoid valve (17) is installed on the first air guide pipe (16); a filter pipe (18) is fixedly connected to the rear part of the support platform (1); the filter pipe (18) has a left side and an inner side. An electric fan (19) is installed on each right side of the filter tube (18); a filter (20) is installed in the middle of the filter tube (18); an annular electric slide rail (21) is fixedly connected to the bend of the filter tube (18); an electric rotator (22) is slidably connected inside each annular electric slide rail (21); two cleaning rods (23) are fixedly connected between the two electric rotators (22); a second air guide pipe (24) is fixedly connected to the right side of the filter tube (18); the second air guide pipe (24) is fixedly connected to the heat preservation box (12).

2. The energy-saving rare earth smelting kiln according to claim 1, characterized in that: The sealing mechanism includes a fixed frame (8), a hydraulic cylinder (9), a sealing door (10), and an electric rotator (11); the left side of the unloading box (7) is fixedly connected to the fixed frame (8); the hydraulic cylinder (9) is fixedly connected to the fixed frame (8); the telescopic part of the hydraulic cylinder (9) is fixedly connected to the sealing door (10); the sealing door (10) is installed on the sealing door (10). After the smelting time reaches the preset time, the rare earth inside the inner tube (302) needs to be unloaded. At this time, the electric rotator (11) on the pre-controlled sealing door (10) is operated, and the preset hole on the sealing door (10) is opened. At this time, the hot air inside the inner tube (302) will flow out from the preset hole.

3. The energy-saving rare earth smelting kiln according to claim 1, characterized in that: The filter tube (18) is small at both ends and large in the middle, thus having two bends.

4. The energy-saving rare earth smelting kiln according to claim 3, characterized in that: The left side of the filter (20) is sealed, and a vent is provided on the outer side of the left side. The filter (20) is used in conjunction with the filter tube (18) to form a filtration direction from the outside to the middle.

5. The energy-saving rare earth smelting kiln according to claim 4, characterized in that: The outer surface of the filter (20) is provided with several raised strips, and the filter screen and adsorption material are arranged on the raised strips.

6. The energy-saving rare earth smelting kiln according to claim 5, characterized in that: The sorting system includes a sorter (25), a third power motor (26), a second spur gear (27), a carrier (28), a second gear ring (29), a lever (30), a fixing ring (31), a crushing roller (32), and a third spur gear (33); the sorter (25) is installed inside the unloading box (7); the third power motor (26) is fixedly connected to the fixing frame (8); the output shaft of the third power motor (26) is fixedly connected to the second spur gear (27); the carrier (28) is rotatably connected to the middle of the unloading box (7). 8) A second toothed ring (29) is fixed to the outer surface of the carrier (28); several levers (30) are fixed to the carrier (28); several levers (30) are fixed to the same fixed ring (31); the fixed ring (31) is rotatably connected to the unloading box (7); the unloading box (7) is rotatably connected to the inside; a crushing roller (32) is fixed to the left side of the crushing roller (32); the second flat gear (27) meshes with the second toothed ring (29); the second flat gear (27) meshes with the third flat gear (33).

7. The energy-saving rare earth smelting kiln according to claim 6, characterized in that: The sorter (25) has a filter hole at the bottom and an open structure at the top.

8. The energy-saving rare earth smelting kiln according to claim 7, characterized in that: The lever (30) has a V-shaped structure.

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