Calcining furnace for producing granular calcium aluminate and use method

Abstract

The invention relates to the technical field of calcium aluminate calcination, in particular to a calcining furnace for producing granular calcium aluminate and a using method. Comprising a supporting frame, a feeding frame is installed on the supporting frame, a driver is installed in the supporting frame, a rotating shell is rotationally connected into the supporting frame, the two ends of the rotating shell are rotationally connected with a first connecting shell and a second connecting shell in a sealed mode respectively, and the two ends of the first connecting shell communicate with the feeding frame and the rotating shell respectively; and the rotating shell communicates with the second connecting shell, and a plurality of flow guide plates distributed in the circumferential direction are rotationally connected into the second connecting shell. Materials attached to the inner wall of the rotating shell are scraped through the flow guide plate, the probability that molten aluminum adheres to the inner wall of the rotating shell after melting, and consequently aluminum nodules are formed on the inner wall of the rotating shell is reduced, and therefore the stability of the material circulation amount of the inner wall of the rotating shell is guaranteed, and the uniformity of heat distribution of all positions of the inner wall of the rotating shell is guaranteed; and thus, the quality of the produced calcium aluminate is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of calcium aluminate calcination, and particularly to a calcination furnace for producing granular calcium aluminate and a use method thereof. BACKGROUND

[0002] Calcium aluminate is an important material widely used in the steel and cement industries, which is usually generated by reacting raw materials rich in calcium oxide and aluminum oxide in high-temperature calcination equipment such as a rotary kiln. The rotary kiln has become the mainstream production equipment due to its large processing capacity and stable operation. However, there are still significant technical problems in the production of granular calcium aluminate. During high-temperature calcination of the material, the aluminum in the raw material melts and adheres to the inner wall of the rotary kiln. With the passage of time, the adhered material will continuously accumulate, forming a hard "aluminum tumor" or ring. This not only reduces the effective flow area in the kiln, leading to poor material flow and reduced production, but also hinders heat conduction due to the tumor, causing uneven heat distribution in the kiln, which seriously affects the quality of the final product. SUMMARY

[0003] In order to overcome the shortcomings presented in the background art, the present application provides a calcination furnace for producing granular calcium aluminate and a use method thereof.

[0004] The technical implementation of the present application is as follows: a calcination furnace for producing granular calcium aluminate, comprising a support frame, the support frame is provided with a feeding frame, a drive is installed in the support frame, a rotating shell is rotatably connected in the support frame, the drive is used to drive the rotating shell, a heater is arranged in the rotating shell, first and second connecting shells are rotatably connected at both ends of the rotating shell, the first connecting shell is in communication with the feeding frame and the rotating shell at both ends, the rotating shell is in communication with the second connecting shell, a plurality of guide plates are rotatably connected in the second connecting shell in a circumferential direction, and the guide plates are rotatably connected with the first connecting shell.

[0005] More preferably, torsional springs are fixed between the guide plates and the second connecting shell, limit blocks are fixed to one end of the guide plates close to the feeding frame, a plurality of blocking bars are uniformly distributed in a circumferential direction and are fixed to the feeding frame, and the blocking bars are used to sequentially extrude all the limit blocks.

[0006] More preferably, the guide plates are fixed with fixing plates, and the fixing plates are used to block the material.

[0007] More preferably, the first connecting shell is fixed with a plurality of blocking frames which are circumferentially distributed and have the same number as the guide plates, and the blocking frames are used to limit adjacent guide plates.

[0008] More preferably, two differentials are installed in the support frame, and the first connecting shell and the rotating shell and the second connecting shell and the rotating shell are respectively driven by the corresponding differentials, so as to generate a speed difference between the first connecting shell and the rotating shell and between the second connecting shell and the rotating shell.

[0009] More preferably, the guide plates are provided with a plurality of gaps distributed at intervals, and the corresponding gaps on different guide plates are distributed in a staggered manner.

[0010] More preferably, the guide plates are provided with a plurality of extrusion portions distributed at intervals, and the extrusion portions are located between adjacent two gaps.

[0011] More preferably, the extrusion portions are provided with inclined surfaces, and the thickness of the extrusion portions gradually decreases from the position close to the first connecting shell to the position away from the first connecting shell.

[0012] More preferably, the second connecting shell is provided with a plurality of filtering openings distributed in a circumferential direction, the support frame is fixedly connected with a fixed shell located outside the second connecting shell, the fixed shell is rotationally connected with the second connecting shell, there is a chamber between the fixed shell and the second connecting shell, the flow area of the chamber gradually decreases from the position close to the rotating shell to the position away from the rotating shell, and the fixed shell is fixedly connected with a plurality of grinding portions located in the chamber and distributed in a circumferential direction.

[0013] A use method of a calcining furnace for producing granular calcium aluminate, based on the above-mentioned calcining furnace for producing granular calcium aluminate, the specific steps are as follows: Step 1: turn on the heater, preheat the inside of the rotating shell, add the material into the feeding frame, turn on the driver, drive the rotating shell to rotate, and drive the first connecting shell and the second connecting shell through the two differentials respectively, so as to generate a speed difference between the first connecting shell and the rotating shell and between the second connecting shell and the rotating shell. Step 2: during the rotation of the second connecting shell, the heater heats the material, and the second connecting shell drives all the guide plates to rotate, and the guide plates scrape off the material adhered to the inner wall of the rotating shell. Step 3: during the rotation of the second connecting shell, the limiting block moves along the blocking bar, so that the guide plate drives the fixed plate to rotate reciprocally, and the guide plate continuously shovels and lifts the material to stir the material. Step 4: during the reciprocating rotation of the guide plate, the guide plate continuously knocks the blocking frame, so that the material adhered to the guide plate is shaken off. Step 5: during the rotation of the guide plate driven by the second connecting shell, the extrusion portion of the guide plate extrudes the material, the material moves along the inclined surface, the material moves through the gap to the extrusion portion of the adjacent guide plate, and the material is guided. Step 6: When the material reaches the second connecting shell, the filter port screens the small calcium aluminate particles and the caking calcium aluminate. The caking calcium aluminate is discharged through the discharge port of the second connecting shell, while the small calcium aluminate particles pass through the filter port into the chamber between the fixed shell and the second connecting shell. The grinding section grinds the small calcium aluminate particles. The small calcium aluminate particles and the caking calcium aluminate particles after production are collected separately. After the calcium aluminate production is completed, the heater and the driver are turned off.

[0014] Compared with the prior art, the present invention has the following advantages: 1. The present invention scrapes off the material attached to the inner wall of the rotating shell by the guide plate, reducing the probability of the molten aluminum adhering to the inner wall of the rotating shell after melting, which would lead to the formation of aluminum nodules on the inner wall of the rotating shell. This ensures the stability of the material flow on the inner wall of the rotating shell and ensures the uniformity of heat distribution on the inner wall of the rotating shell, thereby improving the quality of calcium aluminate after production. At the same time, it reduces the difficulty of subsequent cleaning of the inner wall of the rotating shell. 2. The baffle bar presses against the limiting block, causing the limiting block to drive the guide plate to rotate on the inner wall of the rotating shell. The torsion spring drives the guide plate to rotate in the opposite direction, making the guide plate reciprocate. This enhances the cleaning force of the guide plate on the inner wall of the rotating shell. At the same time, the reciprocating rotation of the limiting block turns the material over, improving the heating uniformity of the material during the heating process, thereby improving the quality of the material after it is generated. The reciprocating rotation of the guide plate knocks against the baffle, causing the material adhering to the guide plate to be shaken off, reducing the difficulty of subsequent cleaning of the guide plate. 3. The material is squeezed and guided by the extrusion section, which makes the material travel speed more stable and reduces the probability of the material staying in the rotating shell for a long time due to unstable travel speed. This ensures the stability of the material heating time and improves the quality of the material after production. 4. Small particles of calcium aluminate and caking calcium aluminate are screened through the filter port to improve the quality of calcium aluminate after production, and the calcium aluminate is ground layer by layer by the grinding section to improve the quality of calcium aluminate after production. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the rotating shell of the present invention; Figure 3 This is a three-dimensional structural diagram of the differential of the present invention; Figure 4 This is a three-dimensional structural diagram of the baffle of the present invention; Figure 5 This is a three-dimensional structural diagram of the baffle strip of the present invention; Figure 6 This is a three-dimensional structural diagram of the extrusion section and the inclined surface of the present invention; Figure 7 This is a three-dimensional structural diagram of the grinding part of the present invention.

[0016] In the diagram: 1. Support frame, 2. Feed rack, 3. Driver, 4. Rotating shell, 5. First connecting shell, 6. Second connecting shell, 7. Guide plate, 8. Torsion spring, 9. Limiting block, 10. Stop bar, 11. Fixing plate, 12. Stop frame, 13. Differential, 14. Notch, 15. Extrusion section, 16. Inclined surface, 17. Filter port, 18. Fixing shell, 1801. Chamber, 19. Grinding section. Detailed Implementation

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0018] A calcining furnace for the production of granular calcium aluminate, such as Figures 1-6As shown, the device includes a support frame 1, on which a control terminal (not shown) is mounted. A feeding rack 2 is also mounted on the support frame 1 for adding materials (i.e., raw materials for producing calcium aluminate). A driver 3, electrically connected to the control terminal, is installed inside the support frame 1. A rotating housing 4 is rotatably connected inside the support frame 1. When installing this device, the left side is higher than the right side, so that the rotating housing 4 tilts downwards from left to right, promoting the material to move to the right within the rotating housing 4. The driver 3 drives the rotating housing 4 to rotate. A feeding device electrically connected to the control terminal is located inside the rotating housing 4. The heater is used to heat the material. The left and right ends of the rotating shell 4 are respectively sealed and rotatably connected to a first connecting shell 5 and a second connecting shell 6. A discharge port is provided on the right side of the second connecting shell 6. The heater is inserted into the first connecting shell 5 through the discharge port. Two differentials 13 are installed inside the support frame 1. The first connecting shell 5 and the rotating shell 4, and the second connecting shell 6 and the rotating shell 4 are respectively driven by corresponding differentials 13, which are used to generate speed differences between the first connecting shell 5 and the rotating shell 4, and between the second connecting shell 6 and the rotating shell 4. During the rotation of the rotating shell 4, the rotating shell 4 is driven by two differentials 13. Each differential 13 drives the first connecting shell 5 and the second connecting shell 6 respectively. The first connecting shell 5 and the second connecting shell 6 rotate at the same speed, while the first connecting shell 5 and the rotating shell 4 rotate at different speeds. The two ends of the first connecting shell 5 are connected to the feed rack 2 and the rotating shell 4 respectively. The rotating shell 4 is connected to the second connecting shell 6. Several circumferentially distributed guide plates 7 are rotatably connected inside the second connecting shell 6. The guide plates 7 are made of high-temperature resistant metal (such as high-chromium cast iron used in the guide structure of existing rotary kilns). The guide plates 7 are in contact with the inner wall of the rotating shell 4. The rotation speed difference between the second connecting shell 6 and the rotating shell 4 is controlled by the rotation speed difference between them. The difference causes relative rotation between the guide plate 7 and the rotating shell 4. During the process of material moving and melting and reorganizing inside the rotating shell 4, the guide plate 7 scrapes off the material adhering to the inner wall of the rotating shell 4, reducing the probability of aluminum liquid adhering to the inner wall of the rotating shell 4 after melting, thus ensuring the stability of the material flow rate inside the rotating shell 4 and ensuring the uniformity of heat distribution throughout the inner wall of the rotating shell 4, thereby improving the quality of calcium aluminate production. At the same time, it reduces the difficulty of subsequent cleaning of the inner wall of the rotating shell 4. The guide plate 7 is rotatably connected to the first connecting shell 5.

[0019] like Figure 3 and Figure 6As shown, a torsion spring 8 is fixed between the guide plate 7 and the second connecting shell 6. A limiting block 9 is fixed to the left end of the guide plate 7. Taking the lower limiting block 9 as an example, the upper and lower sides of the lower limiting block 9 are both arc surfaces, and the front and rear sides of the lower limiting block 9 are both flat surfaces. The feed rack 2 is fixed with several baffles 10 evenly distributed in the circumference. During the process of the second connecting shell 6 driving all the guide plates 7 to rotate, the baffles 10 squeeze all the limiting blocks 9 in sequence, so that all the limiting blocks 9 drive the adjacent guide plates 7 to rotate in sequence. The guide plate 7 rotates on the inner wall of the rotating shell 4, which enhances the cleaning force of the guide plate 7 on the inner wall of the rotating shell 4.

[0020] like Figure 5 As shown, the guide plate 7 is fixedly connected to the fixing plate 11. During the process of the material being turned over by the guide plate 7, the fixing plate 11 blocks the material so that the material is held on the guide plate 7 and turned over.

[0021] like Figure 4 As shown in the figure, taking four guide plates 7 as an example, the first connecting shell 5 is fixed with four baffles 12 distributed circumferentially. When the guide plate 7 rotates, the torsion spring 8 rotates and stores force. When the torsion spring 8 resets and drives the guide plate 7 to reset, the baffles 12 limit the adjacent guide plates 7. The guide plate 7 knocks the baffles 12, causing the material adhering to the guide plate 7 to be shaken off, reducing the difficulty of subsequent cleaning of the guide plate 7.

[0022] The specific working principle is as follows: When the operator needs to use this device to produce calcium aluminate, the operator turns on the heater via the control terminal. The heater preheats the inside of the rotating shell 4. The operator adds the material to the feed rack 2 and turns on the driver 3 via the control terminal. The driver 3 drives the rotating shell 4 to rotate. Figure 1 From the right view, the rotating housing 4 rotates clockwise. The rotating housing 4 drives the first connecting housing 5 and the second connecting housing 6 respectively through two differentials 13, so that a speed difference is generated between the second connecting housing 6 and the rotating housing 4.

[0023] During the rotation of the rotating shell 4, the first connecting shell 5, and the second connecting shell 6, the material moves from left to right. The heater heats the material, and the second connecting shell 6 drives all the guide plates 7 to rotate. Through the speed difference between the guide plates 7 and the rotating shell 4, as the material moves and melts and reassembles inside the rotating shell 4, the guide plates 7 scrape off the material adhering to the inner wall of the rotating shell 4, reducing the probability of molten aluminum adhering to the inner wall of the rotating shell 4 and forming aluminum nodules. This ensures the stability of the material flow rate inside the rotating shell 4 and the uniformity of heat distribution throughout the inner wall of the rotating shell 4, thereby improving the quality of calcium aluminate after production.

[0024] During the process of the second connecting shell 6 driving all the guide plates 7 to rotate, the guide plate 7 drives the limiting block 9 to rotate. The limiting block 9 rotates until it contacts the corresponding baffle 10. As the guide plate 7 rotates, the baffle 10 blocks the limiting block 9, causing the limiting block 9 to rotate. The guide plate 7 rotates on its own axis, the torsion spring 8 twists and stores force, and the guide plate 7 drives the fixed plate 11 to rotate on its own axis. The guide plate 7 scoops up the material onto its surface.

[0025] After the guide plate 7 drives the limiting block 9 to rotate until it loses contact with the baffle 10, the torsion spring 8 resets and drives the guide plate 7 to reverse. The guide plate 7 drives the fixing plate 11 to reverse, and the guide plate 7 lifts up the material on it, turning the material over to ensure the uniformity of the material's heating. Repeating the above steps, the guide plate 7 reciprocates on the inner wall of the rotating shell 4, enhancing the cleaning force of the guide plate 7 on the inner wall of the rotating shell 4 and continuously turning the material over to improve the uniformity of the material's heating, thereby ensuring the quality of the material after it is generated.

[0026] During the rotation of the guide plate 7, the torsion spring 8 rotates and stores energy. When the torsion spring 8 resets and drives the guide plate 7 to reset, the guide plate 7 continuously strikes the baffle 12, causing the material adhering to the guide plate 7 to be shaken off, reducing the difficulty of subsequent cleaning of the guide plate 7.

[0027] As the material moves from left to right, when it reaches the right side of the second connecting shell 6, the operator collects the produced calcium aluminate. After the calcium aluminate production is completed, the operator shuts off the heater and driver 3 via the control terminal. Example 2

[0028] Based on Example 1, such as Figures 3-6 As shown, the guide plate 7 is provided with several notches 14 spaced apart. The notches 14 on different guide plates 7 are staggered, so that the material at the guide plate 7 moves through the notches 14 to another adjacent guide plate 7 during its movement. The guide plate 7 is provided with several extrusion sections 15 spaced apart. The extrusion sections 15 are located between two adjacent notches 14. The extrusion sections 15 are used to extrude and turn the material. The extrusion sections 15 are provided with inclined surfaces 16. The thickness of the extrusion sections 15 gradually decreases from left to right. During the rotation of the guide plate 7 driven by the second connecting shell 6, the extrusion sections 15 of the guide plate 7 extrude the material. The material moves to the right along the inclined surfaces 16, and the material is guided. As the material moves to the right, it passes through the notches 14 and moves to the extrusion section 15 of another adjacent guide plate 7. This process is repeated to guide the material, making the material movement speed more stable and reducing the probability of the material staying in the rotating shell 4 for a long time due to unstable movement speed. This ensures the stability of the material heating time and improves the quality of the material after production. Example 3

[0029] Based on Example 2, such as Figure 4 and Figure 7 As shown, the second connecting shell 6 is provided with several circumferentially distributed filter ports 17. The filter ports 17 are used to filter the produced calcium aluminate, allowing small calcium aluminate particles to pass through the filter ports 17. The agglomerated calcium aluminate is isolated inside the second connecting shell 6. The support frame 1 is fixedly connected to a fixed shell 18 located outside the second connecting shell 6. The fixed shell 18 is rotatably connected to the second connecting shell 6. There is a chamber 1801 between the fixed shell 18 and the second connecting shell 6. The flow area of ​​the chamber 1801 gradually decreases from left to right. Several circumferentially distributed grinding parts 19 are fixedly connected inside the fixed shell 18, all located within the chamber 1801. When the produced calcium aluminate travels to the filter port 17, the small calcium aluminate particles pass through the filter port 17 and enter the fixed shell 18. Within the chamber 1801 between the shell 18 and the second connecting shell 6, as the second connecting shell 6 rotates, the second connecting shell 6 rotates relative to the fixed shell 18. The grinding section 19 of the fixed shell 18 grinds the small particles of calcium aluminate. Since the flow area of ​​the chamber 1801 between the fixed shell 18 and the second connecting shell 6 gradually decreases from left to right, the grinding section 19 grinds the calcium aluminate layer by layer as the small particles of calcium aluminate move to the right, improving the quality of the calcium aluminate after production. The caking calcium aluminate moves to the right and is discharged through the discharge port of the second connecting shell 6. The small particles of calcium aluminate and the caking calcium aluminate are screened to improve the quality of the calcium aluminate after production. The operator collects and centrally crushes the caking calcium aluminate. Example 4

[0030] Based on Example 3, such as Figures 1-7 As shown, a method for using a calcining furnace for the production of granular calcium aluminate, based on the aforementioned calcining furnace for the production of granular calcium aluminate, includes the following specific steps: Step 1: Turn on the heater to preheat the inside of the rotating shell 4. Add the material to the feed rack 2 and turn on the driver 3. The driver 3 drives the rotating shell 4 to rotate. The rotating shell 4 drives the first connecting shell 5 and the second connecting shell 6 through two differentials 13 respectively, so that there are speed differences between the first connecting shell 5 and the rotating shell 4, and between the second connecting shell 6 and the rotating shell 4 respectively. Step 2: During the rotation of the second connecting shell 6, the heater heats the material, and the second connecting shell 6 drives all the guide plates 7 to rotate. The guide plates 7 scrape off the material adhering to the inner wall of the rotating shell 4. Step 3: During the process of the second connecting shell 6 driving all the guide plates 7 to rotate, the limiting block 9 moves along the baffle 10, causing the guide plate 7 to drive the fixed plate 11 to rotate back and forth. The guide plate 7 continuously scoops up and lifts the material, turning the material over. Step 4: During the reciprocating rotation of the guide plate 7, the guide plate 7 continuously strikes the baffle 12, causing the material adhering to the guide plate 7 to be shaken off. Step 5: During the rotation of the guide plate 7 driven by the second connecting shell 6, the extrusion part 15 of the guide plate 7 extrudes the material, the material moves along the inclined surface 16, and the material passes through the notch 14 to the extrusion part 15 of another adjacent guide plate 7 to guide the material. Step 6: When the material reaches the second connecting shell 6, the filter port 17 screens the small calcium aluminate particles and the caking calcium aluminate. The caking calcium aluminate is discharged through the discharge port of the second connecting shell 6, and the small calcium aluminate particles pass through the filter port 17 into the chamber 1801 between the fixed shell 18 and the second connecting shell 6. The grinding section 19 grinds the small calcium aluminate particles. The small calcium aluminate particles and the caking calcium aluminate particles after production are collected separately. When the calcium aluminate production is completed, the heater and the driver 3 are turned off.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A calcining furnace for the production of granular calcium aluminate, characterized in that it includes: There is a support frame (1), on which a feed rack (2) is installed. A driver (3) is installed inside the support frame (1). A rotating shell (4) is rotatably connected inside the support frame (1). The driver (3) is used to drive the rotating shell (4). A heater is provided inside the rotating shell (4). A first connecting shell (5) and a second connecting shell (6) are respectively sealed and rotatably connected to both ends of the rotating shell (4). Both ends of the first connecting shell (5) are respectively connected to the feed rack (2) and the rotating shell (4). The rotating shell (4) is connected to the second connecting shell (6). Several circumferentially distributed guide plates (7) are rotatably connected inside the second connecting shell (6). The guide plates (7) are rotatably connected to the first connecting shell (5).

2. A calcining furnace for the production of granular calcium aluminate according to claim 1, characterized in that, A torsion spring (8) is fixed between the guide plate (7) and the second connecting shell (6). A limit block (9) is fixed to one end of the guide plate (7) near the feed rack (2). A number of baffles (10) are fixed to the feed rack (2) in a circumferentially evenly distributed manner. The baffles (10) are used to squeeze all the limit blocks (9) in sequence.

3. A calcining furnace for the production of granular calcium aluminate according to claim 2, characterized in that, The guide plate (7) is fixedly connected to a fixing plate (11), which is used to block the material.

4. A calcining furnace for the production of granular calcium aluminate according to claim 3, characterized in that, The first connecting shell (5) is fixed with circumferentially distributed baffles (12) in the same number as the guide plates (7), and the baffles (12) are used to limit the adjacent guide plates (7).

5. A calcining furnace for the production of granular calcium aluminate according to claim 4, characterized in that, Two differentials (13) are installed inside the support frame (1). The first connecting shell (5) and the rotating shell (4) are connected by the corresponding differentials (13), and the second connecting shell (6) and the rotating shell (4) are connected by the corresponding differentials (13) to generate speed differences between the first connecting shell (5) and the rotating shell (4), and between the second connecting shell (6) and the rotating shell (4).

6. A calcining furnace for the production of granular calcium aluminate according to claim 5, characterized in that, The guide plate (7) is provided with a number of notches (14) spaced apart, and the notches (14) on different guide plates (7) are staggered.

7. A calcining furnace for the production of granular calcium aluminate according to claim 6, characterized in that, The guide plate (7) is provided with a plurality of extrusion sections (15) spaced apart, and the extrusion sections (15) are located between two adjacent notches (14).

8. A calcining furnace for the production of granular calcium aluminate according to claim 7, characterized in that, The extrusion section (15) is provided with a slope (16), and the thickness of the extrusion section (15) gradually decreases from near the first connecting shell (5) to far away.

9. A calcining furnace for the production of granular calcium aluminate according to claim 8, characterized in that, The second connecting shell (6) is provided with a plurality of filter ports (17) distributed circumferentially. The support frame (1) is fixedly connected to a fixed shell (18) located outside the second connecting shell (6). The fixed shell (18) is rotatably connected to the second connecting shell (6). There is a chamber (1801) between the fixed shell (18) and the second connecting shell (6). The flow area of ​​the chamber (1801) gradually decreases from the point near the rotating shell (4) to the point far away. A plurality of grinding parts (19) distributed circumferentially and located in the chamber (1801) are fixedly connected inside the fixed shell (18).

10. A method of using a calcining furnace for the production of granular calcium aluminate, comprising the calcining furnace for the production of granular calcium aluminate as described in claim 9, wherein the specific steps are as follows: Step 1: Turn on the heater to preheat the inside of the rotating shell (4), add the material to the feed rack (2), turn on the driver (3), the driver (3) drives the rotating shell (4) to rotate, the rotating shell (4) drives the first connecting shell (5) and the second connecting shell (6) respectively through two differentials (13), so that the first connecting shell (5) and the rotating shell (4) and the second connecting shell (6) generate speed differences respectively; Step 2: During the rotation of the second connecting shell (6), the heater heats the material, and the second connecting shell (6) drives all the guide plates (7) to rotate. The guide plates (7) scrape off the material adhering to the inner wall of the rotating shell (4). Step 3: During the process of the second connecting shell (6) driving all the guide plates (7) to rotate, the limiting block (9) moves along the baffle (10), causing the guide plate (7) to drive the fixed plate (11) to rotate back and forth. The guide plate (7) continuously scoops up and lifts the material, turning the material over. Step 4: During the reciprocating rotation of the guide plate (7), the guide plate (7) continuously strikes the baffle (12), causing the material adhering to the guide plate (7) to be shaken off. Step 5: During the rotation of the guide plate (7) driven by the second connecting shell (6), the extrusion part (15) of the guide plate (7) extrudes the material, the material moves along the inclined surface (16), and the material passes through the notch (14) and moves to the extrusion part (15) of another adjacent guide plate (7) to guide the material. Step 6: When the material reaches the second connecting shell (6), the filter port (17) screens the small particles of calcium aluminate and the caking calcium aluminate. The caking calcium aluminate is discharged through the discharge port of the second connecting shell (6), and the small particles of calcium aluminate pass through the filter port (17) into the chamber (1801) between the fixed shell (18) and the second connecting shell (6). The grinding part (19) grinds the small particles of calcium aluminate. The small particles of calcium aluminate and the caking calcium aluminate after production are collected separately. When the calcium aluminate production is completed, the heater and the driver (3) are turned off.

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