High-temperature resistant sealing structure at the tail of the lithium ore roasting rotary kiln

Abstract

The present invention discloses a high-temperature resistant sealing structure at the tail of a lithium ore roasting rotary kiln, belonging to the field of sealing structures, including a kiln barrel. A kiln tail smoke hood is installed at the side position of the kiln barrel. A sealing mechanism is movably installed between the kiln barrel and the kiln tail smoke hood. The sealing mechanism includes an outward expansion pipe, a sealing ring plate, a stationary connecting cylinder, a first limiting ring, a second limiting ring, a first sealing ring, a second sealing ring, and a pushing ring. Through the sealing mechanism, the sealing effect between the kiln barrel and the stationary connecting cylinder is better. Through the temperature reduction mechanism provided on the outward expansion pipe, the outward expansion pipe is cooled. By blocking the transfer of high temperature to the sealing ring plate, the temperatures of the outward expansion pipe and the sealing ring plate are reduced, so that the temperatures of the first sealing ring and the second sealing ring are reduced, making them not easily softened by high temperature and more heat-resistant. Through the soot removal mechanism provided, soot removal operation is carried out on the waste heat recovery pipe, making it easier to remove the soot on the waste heat recovery pipe and enabling the waste heat effect of the waste heat recovery pipe to be maintained well.

Description

Technical Field

[0001] The present invention relates to the field of sealing structures, and particularly to a high-temperature resistant sealing structure at the tail of a lithium ore roasting rotary kiln. Background Technique

[0002] Lithium ore is an important raw material for lithium battery materials in new energy. After mixing and stirring the lithium ore raw materials and roasting auxiliary materials evenly, the raw materials are pressed into shape by a brick-making machine, and then the pressed raw materials are sent into a rotary kiln for calcination. After cooling, they are ground and broken and immersed in a leaching tank. After solid-liquid separation, the raw materials for lithium batteries are obtained through mixing, evaporation, and separation and concentration. When the lithium ore is calcined in the rotary kiln, it enters the kiln barrel through the tail of the kiln and is calcined at high temperature in the kiln barrel. However, in the existing tail structure of the kiln, air leakage is likely to occur when connecting to the rotating kiln barrel. The main reason is that the high-temperature kiln barrel transfers heat to the sealing rubber pad on the tail of the kiln, resulting in the softening of the rubber pad and causing air leakage between the kiln barrel and the tail of the kiln. At the same time, in the existing tail gas hood of the kiln, the heat recovery device set has a reduced heat recovery effect of the heat recovery pipe due to the gradual coverage of soot after being used for a period of time. Summary of the Invention

[0003] The main object of the present invention is to provide a high-temperature resistant sealing structure at the tail of a lithium ore roasting rotary kiln, which can effectively solve the problems in the background technique.

[0004] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] High-temperature resistant sealing structure at the tail of a lithium ore roasting rotary kiln, including a kiln barrel. A tail gas hood is installed on the side of the kiln barrel. A sealing mechanism is movably installed between the kiln barrel and the tail gas hood. The sealing mechanism includes an outward expansion pipe, a sealing ring plate, a stationary connecting cylinder, a first limiting ring, a second limiting ring, a first sealing ring, a second sealing ring, and a pushing ring. The outward expansion pipe is fixedly installed on the kiln barrel. The sealing ring plate is fixedly installed on the sealing ring plate. The stationary connecting cylinder is movably installed inside the outward expansion pipe. The first limiting ring is fixedly installed on the stationary connecting cylinder. The first sealing ring is fixedly installed on the stationary connecting cylinder and is located on the side of the first limiting ring. The second limiting ring is also fixedly installed on the stationary connecting cylinder and is located on the side of the first limiting ring. The second sealing ring is movably installed on the stationary connecting cylinder and is located between the first limiting ring and the second limiting ring. The pushing ring is movably installed on the second sealing ring. The sealing ring plate is located between the first limiting ring and the second limiting ring. A cooling mechanism is fixedly installed on the outward expansion pipe. The cooling mechanism includes a flow channel, a water supply pipe, a water receiving tray, and a water pump. The flow channel is fixedly installed on the surface of the outward expansion pipe. The water receiving tray is fixedly installed below the flow channel. The water pump is fixedly installed with the water receiving tray. The water supply pipe is fixedly installed at the outlet of the water pump. A soot removal mechanism is movably installed inside the tail gas hood. The soot removal mechanism includes a waste heat recovery pipe, a scraper, a moving plate, a screw rod, and a stepping motor. The waste heat recovery pipe is fixedly installed inside the tail gas hood. The scraper is movably installed on the waste heat recovery pipe. The moving plate is fixedly installed in the middle of the scraper. The screw rod is movably installed inside the moving plate. The stepping motor is fixedly installed at one end of the screw rod.

[0006] Preferably, the sealing mechanism further includes a flange. The flange is fixedly installed on the stationary connecting cylinder, and the flange is in mutual contact with one side inside the outward expansion pipe.

[0007] Preferably, the sealing mechanism further includes a connecting rod, a connecting pipe, a movable column, and a spring. One end of the connecting rod is fixedly installed on the pushing ring. The movable column is fixedly installed at the other end of the connecting rod. The connecting rod and the movable column are movably installed inside the connecting pipe. The spring is also movably installed inside the connecting pipe. The spring is located on the side of the movable column.

[0008] Preferably, the sealing mechanism further includes a stud and a nut. The stud is fixedly installed on the connecting pipe. The nut is movably installed on the stud. Through holes are fixedly opened at one ends of the second limiting ring and the second sealing ring. One end of the second sealing ring is fixedly installed through the stud and the nut. The pushing ring is fixedly installed with the other end of the second sealing ring, and the other end of the second sealing ring is in contact with the sealing ring plate. The outer side of the first sealing ring is in contact with the inner wall of the outward expansion pipe.

[0009] Preferably, the cooling mechanism further includes a water outlet, which is fixedly installed at the upper end of the water supply pipe, and the lower end of the water outlet is located in the flow channel.

[0010] Preferably, the cooling mechanism further includes a water suction pipe, which is fixedly installed on one side of the water receiving tray, and the water suction pipe is fixedly communicated with the water suction pump.

[0011] Preferably, the soot removal mechanism further includes a water inlet pipe and a water outlet pipe. The water inlet pipe is fixedly installed on one side of the kiln tail smoke hood, the water outlet pipe is fixedly installed on the other side of the kiln tail smoke hood, the waste heat recovery pipe is located between the water inlet pipe and the water outlet pipe, and both ends of the waste heat recovery pipe are fixedly installed with the water inlet pipe and the water outlet pipe respectively.

[0012] Preferably, through holes are provided at the positions of the scraper corresponding to the waste heat recovery pipe. The scraper is movably installed on the waste heat recovery pipe through the through holes. The scraper is also located on the water inlet pipe and the water outlet pipe. A threaded hole is fixedly opened on the moving plate, and the moving plate is movably installed with the screw rod through the threaded hole.

[0013] Preferably, the soot removal mechanism further includes a bearing and a mounting plate. The number of bearings is two. The screw rod is movably installed on both sides of the kiln tail smoke hood through the bearings. The mounting plate is fixedly installed on the side position of the kiln tail smoke hood, and the stepping motor is fixedly installed on the mounting plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] Through the arranged cooling mechanism, the outer expansion pipe expands outwards. Through the flow channel, water supply pipe and other structures arranged thereon, the middle position of the outer expansion pipe is continuously cooled, blocking the high temperature from being transmitted to the sealing ring plate through the outer expansion pipe, cooling the sealing ring plate, so that the temperatures of the first sealing ring and the second sealing ring in contact with the outer expansion pipe and the sealing ring plate are reduced, making them not easily softened by high temperature and more heat-resistant;

[0016] Through the arranged sealing mechanism, through structures such as the first sealing ring and the second sealing ring, the outer expansion pipe and the sealing ring plate are sealed with each other. Through the pushing ring, the second sealing ring and the sealing ring plate are always tightly pressed against each other for sealing, making the sealing effect between the kiln barrel and the stationary connecting barrel better;

[0017] Through the arranged soot removal mechanism, through the back-and-forth movement of the scraper, the scraper moves on the waste heat recovery pipe, so as to effectively remove the soot on the waste heat recovery pipe, making it easier to remove the soot on the waste heat recovery pipe;

[0018] Through the arranged soot removal mechanism, by removing the soot by the scraper, the influence of soot on the waste heat recovery effect of the waste heat recovery pipe is reduced, and the waste heat recovery effect is better. Brief Description of the Drawings

[0019] Figure 1 This is the overall structural schematic diagram of the high-temperature resistant sealing structure at the tail of the rotary kiln for lithium ore roasting of the present invention;

[0020] Figure 2 This is the sectional structural schematic diagram of the outward expansion pipe of the high-temperature resistant sealing structure at the tail of the rotary kiln for lithium ore roasting of the present invention;

[0021] Figure 3 This is the structural schematic diagram of the stationary connecting cylinder of the high-temperature resistant sealing structure at the tail of the rotary kiln for lithium ore roasting of the present invention;

[0022] Figure 4 This is the structural schematic diagram of the driving ring of the high-temperature resistant sealing structure at the tail of the rotary kiln for lithium ore roasting of the present invention;

[0023] Figure 5 This is the sectional structural schematic diagram of the connecting pipe of the high-temperature resistant sealing structure at the tail of the rotary kiln for lithium ore roasting of the present invention;

[0024] Figure 6 This is the structural schematic diagram of the temperature reduction mechanism of the high-temperature resistant sealing structure at the tail of the rotary kiln for lithium ore roasting of the present invention;

[0025] Figure 7 This is the structural schematic diagram of the soot removal mechanism of the high-temperature resistant sealing structure at the tail of the rotary kiln for lithium ore roasting of the present invention.

[0026] In the figure: 1, kiln barrel; 2, tail smoke hood; 3, sealing mechanism; 301, outward expansion pipe; 302, sealing ring plate; 303, stationary connecting cylinder; 304, flange; 305, first limiting ring; 306, second limiting ring; 307, first sealing ring; 308, second sealing ring; 309, driving ring; 310, connecting rod; 311, connecting pipe; 312, movable column; 313, spring; 314, stud; 315, nut; 4, temperature reduction mechanism; 401, flow channel; 402, water supply pipe; 403, water outlet; 404, water receiving tray; 405, water extraction pipe; 406, water extraction pump; 5, soot removal mechanism; 501, water inlet pipe; 502, water outlet pipe; 503, waste heat recovery pipe; 504, scraper; 505, moving plate; 506, screw rod; 507, bearing; 508, stepping motor; 509, mounting plate. Detailed Description of the Invention

[0027] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0028] Such as Figure 1-7As shown, a high-temperature resistant sealing structure at the tail of a lithium ore roasting rotary kiln includes a kiln barrel 1. A kiln tail smoke hood 2 is installed on the side of the kiln barrel 1. A sealing mechanism 3 is movably installed between the kiln barrel 1 and the kiln tail smoke hood 2. The sealing mechanism 3 includes an outward expansion pipe 301, a sealing ring plate 302, a stationary connecting cylinder 303, a first limiting ring 305, a second limiting ring 306, a first sealing ring 307, a second sealing ring 308, and a pushing ring 309. The outward expansion pipe 301 is fixedly installed on the kiln barrel 1. The sealing ring plate 302 is fixedly installed on the sealing ring plate 302. The stationary connecting cylinder 303 is movably installed inside the outward expansion pipe 301. The first limiting ring 305 is fixedly installed on the stationary connecting cylinder 303. The first sealing ring 307 is fixedly installed on the stationary connecting cylinder 303 and is located on the side of the first limiting ring 305. The second limiting ring 306 is also fixedly installed on the stationary connecting cylinder 303 and is located on the side of the first limiting ring 305. The second sealing ring 308 is movably installed on the stationary connecting cylinder 303 and is located between the first limiting ring 305 and the second limiting ring 306. The pushing ring 309 is movably installed on the second sealing ring 308. The sealing ring plate 302 is located between the first limiting ring 305 and the second limiting ring 306. A cooling mechanism 4 is fixedly installed on the outward expansion pipe 301. The sealing mechanism 3 also includes a flange 304. The flange 304 is fixedly installed on the stationary connecting cylinder 303, and the flange 304 is in mutual contact with one side inside the outward expansion pipe 301. The sealing mechanism 3 also includes a connecting rod 310, a connecting pipe 311, a movable column 312, and a spring 313. One end of the connecting rod 310 is fixedly installed on the pushing ring 309. The movable column 312 is fixedly installed at the other end of the connecting rod 310. The connecting rod 310 and the movable column 312 are movably installed inside the connecting pipe 311. The spring 313 is also movably installed inside the connecting pipe 311 and is located on the side of the movable column 312. The sealing mechanism 3 also includes a stud 314 and a nut 315. The stud 314 is fixedly installed on the connecting pipe 311. The nut 315 is movably installed on the stud 314. Through holes are fixedly opened at one ends of the second limiting ring 306 and the second sealing ring 308. One end of the second sealing ring 308 is fixedly installed through the stud 314 and the nut 315. The pushing ring 309 is fixedly installed with the other end of the second sealing ring 308, and the other end of the second sealing ring 308 is in mutual contact with the sealing ring plate 302. The outer side of the first sealing ring 307 is in mutual contact with the inner wall of the outward expansion pipe 301. Through the mutual extrusion and contact between the second sealing ring 308 and the sealing ring plate 302, a seal is formed. When the outward expansion pipe 301 rotates, the second sealing ring 308 and the sealing ring plate 302 are mutually extruded and sealed. At the same time, inside the outward expansion pipe 301, the inner wall of the outward expansion pipe 301 is sealed by the first sealing ring 307. The tail of the kiln is initially sealed. The tail of the kiln forms a double-layer sealing structure through the first sealing ring 307 and the second sealing ring 308, and the sealing effect is better.Moreover, the second sealing ring 308 seals between the second limiting ring 306 and the sealing ring plate 302, so as to form a heat preservation chamber at the inner side position of the outer expansion pipe 301.

[0029] The cooling mechanism 4 includes a flow channel 401, a water supply pipe 402, a water receiving tray 404 and a water pump 406. The flow channel 401 is fixedly installed on the surface of the outer expansion pipe 301. The water receiving tray 404 is fixedly installed below the flow channel 401. The water pump 406 is fixedly installed with the water receiving tray 404. The water supply pipe 402 is fixedly installed at the outlet of the water pump 406. The cooling mechanism 4 further includes a water outlet 403, and the water outlet 403 is fixedly installed at the upper end of the water supply pipe 402. The lower end of the water outlet 403 is located in the flow channel 401. The cooling mechanism 4 further includes a water suction pipe 405, and the water suction pipe 405 is fixedly installed on one side of the water receiving tray 404. The water suction pipe 405 is fixedly communicated with the water pump 406. Through the outer expansion pipe 301, a structure is extended outward from the kiln barrel 1, and the sealing ring plate 302 is placed on the outer side. Through the alignment and sealing of the first sealing ring 307 and the second sealing ring 308, cooling water is sprayed out at the water outlet 403, flows downward through the flow channel 401, and drips into the water receiving tray 404 below. The first sealing ring 307 is located at the inner side of the flow channel 401. The temperature on the sealing ring plate 302 is mainly transmitted by the high-temperature kiln barrel 1. The cooling water flows on the flow channel 401, so that part of the heat is taken away, blocking part of the high temperature from being transmitted to the sealing ring plate 302. At the same time, the temperature of the outer expansion pipe 301 is reduced, so that the temperatures of the contacted first sealing ring 307 and the second sealing ring 308 are reduced, and the sealing mechanism 3 is more resistant to high temperature. At the same time, the existence of the heat preservation chamber can block the transmission of low temperature to the stationary connecting barrel 303 at the inner side position, so that the kiln barrel 1 and the stationary connecting barrel 303 are not affected by the cooling water, and the temperature of the materials in the barrel will not be reduced. The cooling water is received through the water receiving tray 404 and recycled through the water pump 406.

[0030] An ash removal mechanism 5 is movably installed inside the kiln tail smoke hood 2. The ash removal mechanism 5 includes a waste heat recovery pipe 503, a scraper 504, a moving plate 505, a screw rod 506, and a stepping motor 508. The waste heat recovery pipe 503 is fixedly installed inside the kiln tail smoke hood 2. The scraper 504 is movably installed on the waste heat recovery pipe 503. The moving plate 505 is fixedly installed at the middle position of the scraper 504. The screw rod 506 is movably installed inside the moving plate 505. The stepping motor 508 is fixedly installed at one end of the screw rod 506. The recycled water passes through the water inlet pipe 501, the waste heat recovery pipe 503, and the water outlet pipe 502 to recover part of the heat in the flue gas. However, the dust in the flue gas is also easily adhered to the waste heat recovery pipe 503. By starting the stepping motor 508, the screw rod 506 rotates, so that the scraper 504 is pushed by the moving plate 505 and moves to the side. The ash on the waste heat recovery pipe 503 is removed through the through holes of the scraper 504. By rotating the screw rod 506 in the reverse direction, the scraper 504 moves in the reverse direction, so that the scraper 504 moves back and forth to remove the ash on the waste heat recovery pipe 503. The operation is convenient. At the same time, the waste heat recovery pipe 503 with removed ash has better contact with the flue gas, and the heat conduction and waste heat recovery effects are better.

[0031] The ash removal mechanism 5 further includes a water inlet pipe 501 and a water outlet pipe 502. The water inlet pipe 501 is fixedly installed at one side position of the kiln tail smoke hood 2. The water outlet pipe 502 is fixedly installed at the other side position of the kiln tail smoke hood 2. The waste heat recovery pipe 503 is located between the water inlet pipe 501 and the water outlet pipe 502. Both ends of the waste heat recovery pipe 503 are fixedly installed with the water inlet pipe 501 and the water outlet pipe 502 respectively. Through holes corresponding to the waste heat recovery pipe 503 are provided on the scraper 504. The scraper 504 is movably installed on the waste heat recovery pipe 503 through the through holes. The scraper 504 is also located on the water inlet pipe 501 and the water outlet pipe 502. A threaded hole is fixedly formed on the moving plate 505. The moving plate 505 is movably installed with the screw rod 506 through the threaded hole. The ash removal mechanism 5 further includes bearings 507 and a mounting plate 509. The number of bearings 507 is two. The screw rod 506 is movably installed with both sides of the kiln tail smoke hood 2 through the bearings 507. The mounting plate 509 is fixedly installed at the side position of the kiln tail smoke hood 2. The stepping motor 508 is fixedly installed on the mounting plate 509.

[0032] It should be noted that the present invention is a high-temperature resistant sealing structure at the tail of a lithium ore roasting rotary kiln. A stationary connecting cylinder 303 is fixedly installed on the tail gas hood 2 of the kiln. The inner side of the flange 304 on the stationary connecting cylinder 303 is in contact with the outer expansion pipe 301 on the kiln cylinder 1, so that the internal raw materials enter the kiln cylinder 1 through the flange 304. The outer expansion pipe 301 is moved outwards to increase the surface area for heat dissipation. A sealing ring plate 302 is provided at the outer end of the outer expansion pipe 301. The sealing ring plate 302 is located between the first limiting ring 305 and the second limiting ring 306. A first sealing ring 307 is fixedly installed between the first limiting ring 305 and the second limiting ring 306. The outer side of the first sealing ring 307 is in contact and sealed with the inner side of the outer expansion pipe 301. The side surface of the sealing ring plate 302 is sealed with one end of the second sealing ring 308. The inner side of this end of the second sealing ring 308 is pushed towards the side by the pushing ring 309. The connecting pipe 311 fixes and installs the other end of the second sealing ring 308 on the second limiting ring 306 through the stud 314 and the nut 315. The other end of the second sealing ring 308 is fixedly sealed on the second limiting ring 306 through a plurality of connecting pipes 311 and studs 314. The spring 313 in the connecting pipe 311 squeezes the pushing ring 309, so that one end of the second sealing ring 308 is fixedly pressed against the side surface of the sealing ring plate 302, thereby sealing between the first limiting ring 305 and the second limiting ring 306. When the kiln cylinder 1 rotates, the outer expansion pipe 301 rotates synchronously. The inner wall of the outer expansion pipe 301 rubs on the outside of the first sealing ring 307, and the sealing ring plate 302 rubs on the second sealing ring 308. Through the extrusion of the pushing ring 309, the sealing effect of the second sealing ring 308 on the sealing ring plate 302 is better, so that the overall sealing effect of the sealing mechanism 3 is better. The sealing ring plate 302 does not contact the stationary connecting cylinder 303. The space between the outer expansion pipe 301 and the stationary connecting cylinder 303 forms a heat preservation bin due to heat transfer. The cooling water in the water receiving tray 404 is pumped out by the water pump 406 and flows to the water outlet 403 above the water supply pipe 402. The lower end of the water outlet 403 is located in the flow channel 401. There are several flow channels 401. By flowing the cooling water into the flow channel 401 and flowing down along the flow channel 401, the outer expansion pipe 301 is cooled, blocking the high temperature from heating the sealing ring plate 302 through the kiln cylinder 1. Through the cooling of the cooling water, the temperatures of the sealing ring plate 302 and the outer expansion pipe 301 are reduced, so that the temperatures of the second sealing ring 308 and the first sealing ring 307 in contact with the sealing ring plate 302 and the outer expansion pipe 301 are reduced, avoiding the softening of the first sealing ring 307 and the second sealing ring 308 due to high temperature and maintaining the sealing effect. A waste heat recovery pipe 503 is provided in the tail gas hood 2 of the kiln to recover the temperature of the tail gas of the kiln. However, the soot will gradually solidify on the waste heat recovery pipe 503, thereby blocking the heat transfer between the temperature in the tail gas and the heat of the recovered water in the waste heat recovery pipe 503.Therefore, by starting the stepper motor 508, the screw rod 506 rotates. The screw rod 506 can rotate forward and backward. Through the screw hole in the moving plate 505, the moving plate 505 is pushed back and forth, so that the scraping plate 504 moves back and forth on the waste heat recovery pipe 503 through the through hole, thereby removing the soot on the waste heat recovery pipe 503, making it easier to remove the soot and maintaining a better waste heat recovery effect of the waste heat recovery pipe 503.

[0033] The foregoing shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. High-temperature resistant sealing structure at the tail of a lithium ore roasting rotary kiln, including a kiln barrel (1), and a tail gas hood (2) is installed at the side position of the kiln barrel (1). It is characterized in that: A sealing mechanism (3) is movably installed between the kiln barrel (1) and the tail gas hood (2). The sealing mechanism (3) includes an outward expanding pipe (301), a sealing ring plate (302), a stationary connecting cylinder (303), a first limiting ring (305), a second limiting ring (306), a first sealing ring (307), a second sealing ring (308) and a pushing ring (309). The outward expanding pipe (301) is fixedly installed on the kiln barrel (1), the sealing ring plate (302) is fixedly installed on the sealing ring plate (302), the stationary connecting cylinder (303) is movably installed in the outward expanding pipe (301), the first limiting ring (305) is fixedly installed on the stationary connecting cylinder (303), the first sealing ring (307) is fixedly installed on the stationary connecting cylinder (303) and is located at the side position of the first limiting ring (305). The second limiting ring (306) is also fixedly installed on the stationary connecting cylinder (303) and is located at the side position of the first limiting ring (305). The second sealing ring (308) is movably installed on the stationary connecting cylinder (303) and is located between the first limiting ring (305) and the second limiting ring (306). The pushing ring (309) is movably installed on the second sealing ring (308). The sealing ring plate (302) is located between the first limiting ring (305) and the second limiting ring (306). A cooling mechanism (4) is fixedly installed on the outward expanding pipe (301). The cooling mechanism (4) includes a flow channel (401), a water supply pipe (402), a water receiving tray (404) and a water pump (406). The flow channel (401) is fixedly installed on the surface position of the outward expanding pipe (301), the water receiving tray (404) is fixedly installed below the flow channel (401), the water pump (406) is fixedly installed with the water receiving tray (404), the water supply pipe (402) is fixedly installed at the outlet of the water pump (406). A soot removing mechanism (5) is movably installed in the tail gas hood (2). The soot removing mechanism (5) includes a waste heat recovery pipe (503), a scraper (504), a moving plate (505), a screw rod (506) and a stepping motor (508). The waste heat recovery pipe (503) is fixedly installed in the tail gas hood (2), the scraper (504) is movably installed on the waste heat recovery pipe (503), the moving plate (505) is fixedly installed at the middle position of the scraper (504), the screw rod (506) is movably installed in the moving plate (505), and the stepping motor (508) is fixedly installed with one end of the screw rod (506).

2. The high-temperature resistant sealing structure at the tail of a lithium ore roasting rotary kiln according to claim 1, It is characterized in that: The sealing mechanism (3) further includes a flange (304) which is fixedly installed on the stationary connecting cylinder (303), and the flange (304) is in contact with one side inside the outwardly expanding pipe (301).

3. The high-temperature resistant sealing structure at the tail of the lithium ore roasting rotary kiln according to claim 1, characterized in that: The sealing mechanism (3) further includes a connecting rod (310), a connecting pipe (311), a movable column (312) and a spring (313). One end of the connecting rod (310) is fixedly installed on the pushing ring (309), the movable column (312) is fixedly installed at the other end of the connecting rod (310), the connecting rod (310) and the movable column (312) are movably installed inside the connecting pipe (311), the spring (313) is also movably installed inside the connecting pipe (311), and the spring (313) is located on the side of the movable column (312).

4. The high-temperature resistant sealing structure at the tail of the lithium ore roasting rotary kiln according to claim 1, characterized in that: The sealing mechanism (3) further includes a stud (314) and a nut (315). The stud (314) is fixedly installed on the connecting pipe (311), the nut (315) is movably installed on the stud (314). Through holes are fixedly formed in one ends of the second limiting ring (306) and the second sealing ring (308). One end of the second sealing ring (308) is fixedly installed through the stud (314) and the nut (315). The pushing ring (309) is fixedly installed with the other end of the second sealing ring (308), and the other end of the second sealing ring (308) is in contact with the sealing ring plate (302). The outer side of the first sealing ring (307) is in contact with the inner wall of the outwardly expanding pipe (301).

5. The high-temperature resistant sealing structure at the tail of the lithium ore roasting rotary kiln according to claim 1, characterized in that: The cooling mechanism (4) further includes a water outlet (403) which is fixedly installed at the upper end of the water supply pipe (402), and the lower end of the water outlet (403) is located inside the flow channel (401).

6. The high-temperature resistant sealing structure at the tail of the lithium ore roasting rotary kiln according to claim 1, characterized in that: The cooling mechanism (4) further includes a water extraction pipe (405) which is fixedly installed at one side of the water receiving tray (404), and the water extraction pipe (405) is fixedly communicated with the water extraction pump (406).

7. The high-temperature resistant sealing structure at the tail of the lithium ore roasting rotary kiln according to claim 1, characterized in that: The soot removal mechanism (5) further includes a water inlet pipe (501) and a water outlet pipe (502). The water inlet pipe (501) is fixedly installed on one side of the kiln tail hood (2), and the water outlet pipe (502) is fixedly installed on the other side of the kiln tail hood (2). The waste heat recovery pipe (503) is located between the water inlet pipe (501) and the water outlet pipe (502), and both ends of the waste heat recovery pipe (503) are fixedly installed with the water inlet pipe (501) and the water outlet pipe (502) respectively.

8. The high-temperature resistant sealing structure at the kiln tail of the lithium ore roasting rotary kiln according to claim 1, characterized in that: a through hole is provided at a position corresponding to the waste heat recovery pipe (503) on the scraper (504), the scraper (504) is movably installed on the waste heat recovery pipe (503) through the through hole, the scraper (504) is also located on the water inlet pipe (501) and the water outlet pipe (502), a threaded hole is fixedly formed on the moving plate (505), and the moving plate (505) is movably installed with the screw rod (506) through the threaded hole.

9. The high-temperature resistant sealing structure at the kiln tail of the lithium ore roasting rotary kiln according to claim 1, characterized in that: the soot removal mechanism (5) further includes bearings (507) and a mounting plate (509). The number of the bearings (507) is two. The screw rod (506) is movably installed on both sides of the kiln tail hood (2) through the bearings (507). The mounting plate (509) is fixedly installed on the side surface of the kiln tail hood (2), and the stepping motor (508) is fixedly installed on the mounting plate (509).

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