Top combustion type aluminum oxide calcining furnace

Abstract

The utility model discloses a top burning type aluminum oxide calcining furnace, and relates to the technical field of aluminum oxide processing, the top burning type aluminum oxide calcining furnace comprises a fixing frame and a calcining furnace body connected to the upper end of the fixing frame, the top of the calcining furnace body is connected with a feeding pipe, and the outer part of the feeding pipe is fixedly connected with a lower mounting ring. The material scattering disc is arranged on the calcining furnace body, so that materials on the material scattering disc can be scattered to all directions in the calcining furnace body due to centrifugal force of rotation, the problem that the materials are not beneficial to preheating due to the fact that the calcining furnace is stacked at the same position during feeding is solved, and the working efficiency of the calcining furnace is improved; the transmission gear is used for driving the scattering disc to rotate and driving the connecting strip and the stirring rod to rotate at the same time, so that the problems that during feeding of the calcining furnace, materials may be attached to the inner wall of the feeding pipe to affect the feeding speed, and meanwhile, material caking affects the calcining uniformity are solved, and the practical performance and the working quality of the calcining furnace can be improved.

Description

Technical Field

[0001] This utility model relates to the field of alumina processing technology, specifically a top-fired alumina calcining furnace. Background Technology

[0002] In the alumina production process, calcination is the key step in converting aluminum hydroxide into alumina.

[0003] Chinese patent application No. 202121217568.0 discloses a high-temperature alumina calcination device, including a base plate, a fixed column fixedly connected to the top left side of the base plate, and a calcination furnace body movably connected to the top of the fixed column via a rotating shaft.

[0004] 1. In this patent, when the material enters the calcining furnace, the material will accumulate in the same position, which will affect the preheating of the material when it enters the calcining furnace, resulting in a lower working efficiency of the calcining furnace for the material in the subsequent calcination process.

[0005] 2. When feeding materials, the materials will adhere to the inner wall of the feed pipe, affecting the feeding efficiency of the calcining furnace. At the same time, there are no measures to break up the agglomerates of materials, which will affect the uniformity of calcination when the materials enter the calcining furnace, resulting in poor practical performance and working quality of the calcining furnace. Utility Model Content

[0006] To address the above problems, this utility model provides a top-fired alumina calcining furnace, which solves the aforementioned issues.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a top-fired alumina calcining furnace, comprising a fixed frame and a calcining furnace body connected to the upper end of the fixed frame, a feed pipe connected to the top of the calcining furnace body, a lower mounting ring fixedly connected to the outside of the feed pipe, a first rotating groove opened at the top of the feed pipe, a transmission gear provided at the top of the feed pipe, and rotating rings fixedly connected to the upper and lower ends of the transmission gear, wherein the outside of one of the rotating rings is rotatably connected to the inside of the first rotating groove;

[0008] Two connecting strips are fixedly connected to the inner side of the transmission gear. One side of the two connecting strips is in contact with the inner wall of the feed pipe. A material spreading disc is fixedly connected to the bottom end of the connecting strip. Several through holes are opened at the bottom of the material spreading disc. A support rod is connected to one side of the two connecting strips. A connecting rod is fixedly connected to the middle of the support rod. Several stirring rods are fixedly connected to the outer side of the connecting rod.

[0009] The top of the calcining furnace is connected to a first motor, and the output end of the first motor is connected to a rotating shaft. The outside of the rotating shaft is connected to a drive gear, and the drive gear meshes with the transmission gear.

[0010] Preferably, the top of the transmission gear is provided with a feeding pipe, and an upper mounting ring is fixedly connected to the outside of the feeding pipe. The upper mounting ring and the lower mounting ring are connected by bolts.

[0011] Preferably, the bottom end of the feeding tube is provided with a second rotating groove, and the outside of the other rotating ring is rotatably connected to the inside of the second rotating groove.

[0012] Preferably, a discharge shell is connected to the bottom of the calcining furnace body, and a burner is connected to the inner top of the calcining furnace body.

[0013] Preferably, a rotating shaft is connected inside the calcining furnace body, and a plurality of fixed rods are connected outside the rotating shaft, with spiral plates connected outside the fixed rods.

[0014] Preferably, a second motor is connected to one side of the fixing frame, and the output end of the second motor is connected to one end of the rotating shaft for transmission.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This application drives the spreading disc to rotate through the transmission gear, so that the material on the spreading disc will be scattered in all directions inside the calcining furnace due to the centrifugal force of the rotation, which improves the uniformity of the feeding of the calcining furnace, solves the problem that the material will accumulate in the same position when the calcining furnace is fed, which makes it difficult for the material to be preheated, and helps to improve the working efficiency of the calcining furnace.

[0017] 2. This application utilizes a transmission gear to drive the material spreading disc to rotate, which in turn drives the connecting strip and the stirring rod to rotate. This causes the connecting strip to scrape the inner wall of the feed pipe, and the stirring rod to break up the lumps in the material. This solves the problem that the material may adhere to the inner wall of the feed pipe during feeding, affecting the feeding speed, and that material lumps may affect the uniformity of calcination. This is beneficial to improving the practical performance and working quality of the calcining furnace. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a cross-sectional structural diagram of the calcining furnace of this utility model;

[0020] Figure 3 This is a schematic diagram of the first partial structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the second partial structure of the present invention;

[0022] Figure 5 This is a cross-sectional view of the feed pipe of this utility model.

[0023] The diagram shows the following components: 1. Fixed frame; 2. Calcination furnace body; 3. Discharge shell; 4. Burner; 5. Feed pipe; 6. Lower mounting ring; 7. Upper mounting ring; 8. Feeding pipe; 9. Transmission gear; 10. Rotating ring; 11. Connecting strip; 12. Spreading disc; 13. Through hole; 14. Support rod; 15. Connecting rod; 16. Stirring rod; 17. First motor; 18. Rotating shaft; 19. Drive gear; 20. Rotating shaft; 21. Fixed rod; 22. Spiral plate; 23. Second motor. Detailed Implementation

[0024] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0025] Please see Figures 1 to 5 A top-fired alumina calcining furnace includes a fixed frame 1 and a calcining furnace body 2 connected to the upper end of the fixed frame 1. A feed pipe 5 is connected to the top of the calcining furnace body 2. Personnel add materials through a feeding pipe 8. The materials enter the interior of the calcining furnace through the feed pipe 5. A lower mounting ring 6 is fixedly connected to the outside of the feed pipe 5. A first rotating groove is opened at the top of the feed pipe 5. A transmission gear 9 is provided at the top of the feed pipe 5. Rotating rings 10 are fixedly connected to the upper and lower ends of the transmission gear 9. The outside of one of the rotating rings 10 is rotatably connected to the inside of the first rotating groove. The output end of the first motor 17 drives the rotating shaft 18 to rotate, so that the rotating shaft 18 drives the drive gear 19 to rotate. At this time, the drive gear 19 drives the transmission gear 9 to rotate. It should be noted that when the transmission gear 9 rotates, it will rotate between the feed pipe 5 and the feeding pipe 8. Specifically, the transmission gear 9 drives the rotating rings 10 at the upper and lower ends to rotate inside the second rotating groove of the feeding pipe 8 and the first rotating groove of the feed pipe 5, respectively.

[0026] Furthermore, the inner diameter of the transmission gear 9 is the same as the inner diameter of the feed pipe 5, so the transmission gear 9 is connected and fixed to the connecting strip 11, so that one side of the connecting strip 11 fits against the inner wall of the feed pipe 5. It should be further added that the connecting strip 11 penetrates the interior of the feed pipe 5 and the lower end of the connecting strip 11 is located below the feed pipe 5 and inside the calcining furnace body 2.

[0027] The rotation of the transmission gear 9 drives the material spreading disc 12 to rotate via the connecting strip 11. The centrifugal force of the rotating material spreading disc 12 can spread the material to different positions inside the calcining furnace. In addition, because the bottom of the material spreading disc 12 has several through holes 13, when the material falls onto the material spreading disc 12 through the feed pipe 5, some of it will fall below the material spreading disc 12 through the through holes 13, while the excess will be spread to other positions by the rotating material spreading disc 12. In this way, the material is more evenly distributed inside the calcining furnace, which can fully preheat it and facilitate the subsequent calcining work. This prevents the material from piling up when it enters the calcining furnace through the feed pipe 5.

[0028] Two connecting strips 11 are fixedly connected to the inner side of the transmission gear 9. One side of the two connecting strips 11 is in contact with the inner wall of the feed pipe 5. A spreading disc 12 is fixedly connected to the bottom end of the connecting strips 11. Several through holes 13 are opened at the bottom of the spreading disc 12. A support rod 14 is connected to one side of the two connecting strips 11. A connecting rod 15 is fixedly connected to the middle of the support rod 14. Several stirring rods 16 are fixedly connected to the outer side of the connecting rod 15. When the transmission gear 9 rotates, it will also drive the connecting strips 11 to rotate inside the feed pipe 5, so that... The connecting bar 11 can scrape the inner wall of the feed pipe 5 to prevent material from adhering to the inner wall of the feed pipe 5, which would affect the feeding efficiency of the feed pipe 5 over time. At the same time, when the connecting bar 11 rotates, it will also drive the support rod 14 to rotate, so that the support rod 14 drives the stirring rod 16 to rotate inside the feed pipe 5 through the connecting rod 15. This allows the stirring rod 16 to break up the clumps of material when it rotates, making it easier for the material to enter the calcining furnace for calcination. This avoids the material from clumping together, which would cause uneven calcination and affect product quality.

[0029] It should be noted that the scraped material will fall onto the spreading plate 12 and can continue to work normally, avoiding material waste and saving production costs.

[0030] The top of the calcining furnace body 2 is connected to a first motor 17, and the output end of the first motor 17 is connected to a rotating shaft 18. The external part of the rotating shaft 18 is connected to a drive gear 19, which meshes with the transmission gear 9.

[0031] The top of the transmission gear 9 is provided with a feeding pipe 8. An upper mounting ring 7 is fixedly connected to the outside of the feeding pipe 8. The upper mounting ring 7 and the lower mounting ring 6 are connected by bolts. The feeding pipe 5 and the feeding pipe 8 are connected and fixed by the upper mounting ring 7 and the lower mounting ring 6 to prevent the feeding pipe 8 from rotating when the transmission gear 9 rotates.

[0032] The bottom end of the feeding pipe 8 is provided with a second rotating groove, and the outside of another rotating ring 10 is rotatably connected to the inside of the second rotating groove.

[0033] The bottom of the calcining furnace body 2 is connected to a discharge shell 3, and the top of the inner part of the calcining furnace body 2 is connected to a burner 4. The discharge shell 3 is equipped with a valve. When the calcining furnace is calcining the material, the discharge shell 3 is closed. After the material calcination is completed, the discharge shell 3 is opened so that the material can be discharged through the discharge shell 3. The burner 4 is connected to an external device through a connecting pipe. The external device supplies the gas required for combustion to the burner 4 so that the burner 4 can generate a flame to calcine the material. The valve of the discharge shell 3 and the burner 4 are both known technologies. Those skilled in the art can and should understand their specific functions and structures, so they will not be described in detail here.

[0034] The calcining furnace body 2 is internally connected to a rotating shaft 20, and externally connected to the rotating shaft 20 are several fixed rods 21, with spiral plates 22 externally connected to the fixed rods 21.

[0035] A second motor 23 is connected to one side of the fixed frame 1. The output end of the second motor 23 is connected to one end of the rotating shaft 20. The output end of the second motor 23 drives the rotating shaft 20 to rotate, which in turn drives the fixed rod 21 and the spiral plate 22 to rotate. At this time, the spiral plate 22 will stir the material inside the calcining furnace, improve the mobility of the material inside the calcining furnace, and help improve the working efficiency of the calcining furnace.

[0036] In addition, it should be noted that although the calcining furnace operates at a high temperature, the components directly affected by the flame temperature (rotating shaft 20, fixed rod 21, spiral plate 22, feed pipe 5, connecting bar 11, and spreading disc 12) are all made of high-temperature resistant nickel-based alloy material. It has excellent high-temperature strength, oxidation resistance and corrosion resistance, and can maintain good mechanical properties at high temperatures. It can be used to manufacture key structural components inside the calcining furnace that withstand high temperatures. Moreover, it is a well-known technology, and those skilled in the art can and should understand its specific functions and structure, so it will not be described in detail here.

[0037] When using this utility model:

[0038] First, the personnel add the material through the feeding pipe 8. The material enters the interior of the calcining furnace through the feeding pipe 5. The output end of the first motor 17 drives the rotating shaft 18 to rotate, which in turn drives the drive gear 19 to rotate. At this time, the drive gear 19 drives the transmission gear 9 to rotate.

[0039] Secondly, the rotation of the transmission gear 9 drives the material spreading disc 12 to rotate through the connecting strip 11. The centrifugal force of the rotating material spreading disc 12 can spread the material to different positions inside the calcining furnace. In addition, because the bottom of the material spreading disc 12 has several through holes 13, when the material falls onto the material spreading disc 12 through the feed pipe 5, some of it will fall below the material spreading disc 12 through the through holes 13, and the excess will be spread to other positions by the rotating material spreading disc 12. In this way, the material is more evenly distributed inside the calcining furnace, which can fully preheat it.

[0040] At the same time, when the transmission gear 9 rotates, it will also drive the connecting bar 11 to rotate inside the feed pipe 5, so that the connecting bar 11 can scrape the inner wall of the feed pipe 5, preventing material from adhering to the inner wall of the feed pipe 5, which would affect the feeding efficiency of the feed pipe 5 over time. At the same time, when the connecting bar 11 rotates, it will also drive the support rod 14 to rotate, so that the support rod 14 drives the stirring rod 16 to rotate inside the feed pipe 5 through the connecting rod 15, thereby causing the stirring rod 16 to break up the clumps of material when it rotates.

[0041] Then, the burner 4 is connected to an external device through a connecting pipe. The external device delivers the gas required for combustion to the burner 4, so that the burner 4 can generate a flame to calcine the material. The output end of the second motor 23 drives the rotating shaft 20 to rotate, which in turn drives the fixed rod 21 and the spiral plate 22 to rotate. At this time, the spiral plate 22 will stir the material inside the calcining furnace, improve the mobility of the material inside the calcining furnace, and help improve the working efficiency of the calcining furnace.

[0042] Finally, the discharge shell 3 is equipped with a valve. When the material is being calcined in the calcining furnace, the discharge shell 3 is closed. After the calcination is completed, the discharge shell 3 is opened so that the material can be discharged through the discharge shell 3.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A top-fired alumina calcination furnace comprising a fixed frame (1) and a calcination furnace body (2) connected to the upper end of the fixed frame (1), characterized in that: The top of the calcination furnace body (2) is connected with a feeding pipe (5), the outer part of the feeding pipe (5) is fixedly connected with a lower mounting ring (6), the top of the feeding pipe (5) is provided with a first rotating groove, the top of the feeding pipe (5) is provided with a transmission gear (9), the upper and lower ends of the transmission gear (9) are fixedly connected with rotating rings (10), and the outer part of one of the rotating rings (10) is rotatably connected with the inner part of the first rotating groove. The inner side of the transmission gear (9) is fixedly connected with two connecting strips (11), one side of the two connecting strips (11) is attached to the inner wall of the feeding pipe (5), the bottom end of the connecting strip (11) is fixedly connected with a material scattering disc (12), the bottom of the material scattering disc (12) is provided with a plurality of through holes (13), one side of the two connecting strips (11) is connected with a supporting rod (14), the middle part of the supporting rod (14) is fixedly connected with a connecting rod (15), and the outer side of the connecting rod (15) is fixedly connected with a plurality of stirring rods (16).

2. The top-fired alumina calcination furnace according to claim 1, characterized in that: The top of the calcination furnace body (2) is connected with a first motor (17), the output end of the first motor (17) is drivingly connected with a rotating shaft (18), the outer part of the rotating shaft (18) is connected with a driving gear (19), and the driving gear (19) is engaged with the transmission gear (9).

3. The top-fired calcination furnace for alumina according to claim 1, characterized in that: The top of the transmission gear (9) is provided with a feeding pipe (8), the outer part of the feeding pipe (8) is fixedly connected with an upper mounting ring (7), and the upper mounting ring (7) and the lower mounting ring (6) are connected through bolts.

4. The top-fired calcination furnace for alumina according to claim 3, characterized in that: The bottom end of the feeding pipe (8) is provided with a second rotating groove, and the outer part of the other rotating ring (10) is rotatably connected with the inner part of the second rotating groove.

5. The top-fired alumina calcination furnace according to claim 1, characterized in that: The bottom of the calcination furnace body (2) is connected with a discharging shell (3), and the inner top end of the calcination furnace body (2) is connected with a burner (4).

6. The top-fired alumina calcination furnace according to claim 1, characterized in that: The inside of the calcination furnace body (2) is connected with a rotating shaft (20), the outer part of the rotating shaft (20) is connected with a plurality of fixed rods (21), and the outer part of the fixed rod (21) is connected with a spiral plate (22).

7. The top-fired alumina calcination furnace according to claim 1, characterized in that: One side of the fixed frame (1) is connected with a second motor (23), and the output end of the second motor (23) is drivingly connected with one end of the rotating shaft (20).

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