A high temperature rotary furnace

Abstract

This utility model discloses a high-temperature rotary kiln, including an inner furnace tube, an outer furnace tube, and a rotary drive mechanism for driving the furnace tubes to rotate. A material storage jacket is formed between the inner and outer furnace tubes. The inner furnace tube is provided with multiple gas distribution column structures, each with multiple gas outlets. Both ends of the inner furnace tube are connected to an inlet connector, which includes a moving ring, a stationary ring, and an elastic abutment assembly. The moving ring is mounted on the inner furnace tube and has a first inlet hole along its circumference. The stationary ring is mounted on a mounting frame and abuts against the moving ring via the elastic abutment assembly. The stationary ring is connected to an inlet pipe and has a second inlet hole on the side facing the moving ring. The second inlet hole is located in the circumferential area corresponding to the material accumulation inside the furnace tube when it rotates. The second inlet hole is always connected to at least one first inlet hole. This utility model has the advantages of improving the uniformity of mixing process gas and materials, increasing clinker yield, and improving product performance stability.

Description

Technical Field

[0001] This utility model relates to the field of thermal equipment technology, specifically to a high-temperature rotary furnace. Background Technology

[0002] A rotary kiln is a heat treatment equipment used for calcining, roasting, or drying granular and powdery materials. It is widely used in metallurgy, chemical industry, and materials processing. The furnace tubes are slowly rotated by a motor via gears or sprockets, hence the name rotary kiln. At the same time, the structure of the rotary kiln is also modified to meet different heat treatment needs.

[0003] In existing high-temperature rotary kilns, it is common to introduce gas at the kiln head and tail. For processes that require precise control of temperature and atmosphere, single-point gas introduction at the kiln head and tail is relatively simple. The process gas jet causes uneven mixing of some powder materials with the process gas, thereby reducing the clinker yield. The common solution is to increase the amount of process gas introduced, but this increases production costs.

[0004] Furthermore, existing high-temperature rotary kilns use simple cylindrical single-layer furnace tubes. These tubes are heated externally via thermal radiation from an electric heating device fixed to an external support, thus heating the material inside. However, this structure has several drawbacks. First, the movement of powdered material within the single-layer tube follows a certain pattern: coarse particles move quickly towards the discharge end and are close to the tube wall, while fine particles move more slowly and remain near the center. Material near the furnace wall is carried along by the rotation of the wall, resulting in a relatively long trajectory, while material near the center may not tumble sufficiently, leading to uneven heating and negatively impacting product performance stability. Second, single-layer furnace tubes are prone to creep and damage under prolonged high-temperature conditions, reducing the equipment's lifespan. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a high-temperature rotary kiln that improves the uniformity of mixing process gas and materials, clinker yield and product performance stability.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A high-temperature rotary kiln includes a furnace tube and a rotary drive mechanism for driving the furnace tube to rotate. The furnace tube includes an inner furnace tube and an outer furnace tube, with a storage jacket formed between the inner and outer furnace tubes. The input and output ends of the furnace tube are respectively connected to a feed buffer bin and a discharge bin that communicate with the storage jacket. The inner furnace tube has multiple gas distribution column structures arranged circumferentially, each gas distribution column structure having multiple air outlets facing the storage jacket. Both ends of the inner furnace tube are connected to an air inlet connector. The air inlet connector includes a moving ring, a stationary ring, and an elastic abutment assembly. The moving ring is mounted on the inner furnace tube and has multiple first air inlets circumferentially connected to the multiple gas distribution column structures. The stationary ring is mounted on a mounting frame and abuts against the moving ring through the elastic abutment assembly. The stationary ring is connected to an air inlet pipe and has a second air inlet on the side facing the moving ring. The second air inlet is located in the circumferential area corresponding to the material accumulation inside the furnace tube when the furnace tube rotates, and the second air inlet is always connected to at least one of the first air inlets.

[0008] As a further improvement to the above technical solution:

[0009] The elastic abutment assembly includes a central shaft, a pressing plate, and a pressing spring. The central shaft passes through a rotating ring and a stationary ring. The rotating ring can rotate relative to the central shaft. One end of the central shaft near the rotating ring is provided with a limiting stop, and the other end passes through the pressing plate and is threadedly connected to a locking element. The pressing plate is slidably mounted on a mounting bracket, and the pressing spring is located between the pressing plate and the stationary ring.

[0010] The mounting bracket includes multiple mounting rods, which are arranged at intervals along the circumference of a stationary ring. The stationary ring is located on each mounting rod, and the clamping spring is sleeved on the outside of each mounting rod.

[0011] The high-temperature rotary furnace also includes an installation sleeve, which is fitted over the furnace tube and the furnace tube can rotate relative to the installation sleeve. Multiple heating zones are spaced apart along the length of the installation sleeve.

[0012] The high-temperature rotary furnace also includes a cooling mechanism, which includes multiple air inlets and multiple air outlets. The multiple air inlets are located at the bottom of the mounting sleeve, and the multiple air outlets are located at the top of the mounting sleeve. The air inlets are connected to a blower, and the air outlets are connected to an exhaust fan.

[0013] The high-temperature rotary furnace also includes a lifting mechanism and a hinge seat. The inlet end of the mounting sleeve is located on the lifting mechanism, and the outlet end is located on the hinge seat. The outer furnace tube has spiral plates with opposite rotation directions at both ends.

[0014] The rotary drive mechanism includes a driving gear, a driven gear, a spring plate, and a drive motor for driving the driving gear to rotate. The driven gear is meshed with the driving gear and is connected to the furnace tube through the spring plate.

[0015] The gas distribution column structure includes a main gas duct and a connecting gas duct. The main gas duct is located on the outside of the inner furnace tube, and the connecting gas duct is located on the inside of the inner furnace tube. The main gas duct is connected to the first air inlet at both ends through a connecting gas duct. The main gas duct extends to the outermost heating zone, and the air outlet is located on the main gas duct.

[0016] The first air inlet is a round hole, and the second air inlet is an arc-shaped waist-shaped hole, which is located at the lower right of the stationary ring.

[0017] The outer furnace tube has multiple lifting plates arranged circumferentially on its inner side, or the outer furnace tube is polygonal.

[0018] Compared with the prior art, the advantages of this utility model are:

[0019] This utility model discloses a high-temperature rotary furnace, in which the furnace tubes include an inner furnace tube and an outer furnace tube, forming a storage jacket between the inner and outer furnace tubes. Material enters from the feed buffer bin, tumbles and propels within the storage jacket, and finally exits to the discharge bin. The height of the storage jacket limits the material layer thickness, resulting in more even material distribution, improved heating uniformity, and more stable product performance. Furthermore, during the tumbling process, the material tends to accumulate at the bottom of the storage jacket due to its own gravity. If a single point of air intake is used, it is difficult to ensure the uniform mixing of process gas and material. Therefore, air intake connectors are connected to both ends of the inner furnace tube. Since the furnace tube needs to rotate during the process, if the air intake pipe also rotates, it would lead to messy winding and affect air intake. Therefore, a moving ring and a stationary ring are separately installed. The moving ring is installed on the inner furnace tube and rotates with it, while the stationary ring is installed on a mounting frame and remains stationary. The process gas is introduced into the stationary ring through the inlet pipe and exited through the second inlet hole on the stationary ring. The rotating ring has multiple first inlet holes arranged circumferentially. The first inlet holes are connected to the corresponding gas distribution column structure on the inner furnace tube. During the rotation of the furnace tube, at least one first inlet hole is always connected to the corresponding second inlet hole to ensure continuous gas intake. The second inlet hole is located in the circumferential area corresponding to the material accumulation inside the furnace tube. Therefore, when the first inlet hole rotates to the circumferential area corresponding to the material accumulation, it will connect with the second inlet hole. Then, through the corresponding gas distribution column structure and the outlet hole, the gas is introduced into the material accumulation layer to achieve full mixing of the material and the process gas, thereby improving the clinker yield. In order to avoid airflow crosstalk when the first inlet hole switches to the second inlet hole, an elastic abutment component is used to keep the stationary ring in contact with the rotating ring without affecting the rotation of the rotating ring, thus ensuring the ventilation effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the high-temperature rotary furnace of this utility model.

[0021] Figure 2 This is a schematic diagram of the air intake connector in this utility model.

[0022] Figure 3 This is a schematic diagram of the structure of the moving ring in this utility model.

[0023] Figure 4 This is a schematic diagram of the stationary ring in this utility model.

[0024] Figure 5 This is a schematic diagram of the structure of the furnace tube with the lifting plate in this utility model.

[0025] Figure 6 This is a schematic diagram of the polygonal structure of the outer furnace tube in this utility model.

[0026] The labels in the diagram represent: 1. Furnace tube; 11. Inner furnace tube; 12. Outer furnace tube; 13. Material storage jacket; 14. Lifting plate; 2. Air inlet connector; 21. Moving ring; 22. Stationary ring; 23. Elastic abutment assembly; 231. Central shaft; 232. Abutment plate; 233. Abutment spring; 234. Limit stop; 235. Locking element; 24. First air inlet; 25. Mounting bracket; 251. Mounting rod; 26. Inlet... 27. Air inlet; 3. Rotary drive mechanism; 31. Drive gear; 32. Driven gear; 33. Drive motor; 4. Air distribution column structure; 41. Main air duct; 42. Connecting air duct; 51. Feed buffer bin; 52. Discharge bin; 61. Lifting mechanism; 62. Hinge seat; 7. Mounting sleeve; 71. Heating zone; 72. Air inlet; 73. Air outlet; 74. Blower; 75. Exhaust fan. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] Figures 1 to 6 This illustration shows an embodiment of the high-temperature rotary furnace of the present invention. The high-temperature rotary furnace of this embodiment includes a furnace tube 1 and a rotary drive mechanism 3 for driving the furnace tube 1 to rotate. The furnace tube 1 includes an inner furnace tube 11 and an outer furnace tube 12, with a storage jacket 13 formed between the inner furnace tube 11 and the outer furnace tube 12. The input and output ends of the furnace tube 1 are respectively connected to a feed buffer chamber 51 and a discharge chamber 52, which communicate with the storage jacket 13. Multiple gas distribution column structures 4 are arranged circumferentially on the inner furnace tube 11, and each gas distribution column structure 4 has multiple gas outlets facing the storage jacket 13. Both ends of the inner furnace tube 11 are connected to gas inlet connectors 2. The air inlet connector 2 includes a rotating ring 21, a stationary ring 22, and an elastic abutment component 23. The rotating ring 21 is installed on the inner furnace tube 11. The rotating ring 21 has multiple first air inlets 24 that are connected to multiple gas distribution column structures 4 in a one-to-one manner along the circumference. The stationary ring 22 is installed on the mounting bracket 25 and abuts against the rotating ring 21 through the elastic abutment component 23. The stationary ring 22 is connected to the air inlet pipe 26 and has a second air inlet 27 on the side facing the rotating ring 21. The second air inlet 27 is located in the circumferential area corresponding to the material accumulation inside the furnace tube 1 when the furnace tube 1 rotates. The second air inlet 27 is always connected to at least one first air inlet 24.

[0032] This high-temperature rotary kiln has a furnace tube 1 consisting of an inner furnace tube 11 and an outer furnace tube 12. A storage jacket 13 is formed between the inner furnace tube 11 and the outer furnace tube 12. The material enters from the feed buffer bin 51, is tumbled and propelled within the storage jacket 13, and finally exits into the discharge bin 52. The height of the storage jacket 13 limits the thickness of the material layer, resulting in more even material distribution, improved heating uniformity, and more stable product performance. In addition, during the tumbling process, the material tends to accumulate in the storage jacket due to its own gravity. At the bottom of layer 13, if a single point of air intake is used, it is difficult to ensure the uniformity of mixing between the process gas and the material. Therefore, air intake connectors 2 are connected to both ends of the inner furnace tube 11. Since the furnace tube 1 needs to rotate during the process, if the air intake pipe 26 also rotates, it will cause the winding to become messy and affect the air intake. Therefore, a moving ring 21 and a stationary ring 22 are set separately. The moving ring 21 is installed on the inner furnace tube 11 and rotates with the inner furnace tube 11, while the stationary ring 22 is installed on the mounting bracket 25 and remains stationary, which facilitates the air intake pipe 26. During installation, process gas is input into the stationary ring 22 through the inlet pipe 26 and output through the second inlet port 27 on the stationary ring 22. The rotating ring 21 has multiple first inlet ports 24 spaced circumferentially. Each first inlet port 24 connects to the corresponding gas distribution column structure 4 on the inner furnace tube 11. During the rotation of the furnace tube 1, at least one first inlet port 24 is always connected to a corresponding second inlet port 27 to ensure continuous gas intake. Furthermore, the second inlet port 27 is located in the circumferential area corresponding to the material accumulation within the furnace tube 1, thus ensuring continuous gas intake during rotation. The first air inlet 24 of the corresponding circumferential area of ​​the stack will be connected to the second air inlet 27, and then the material in the storage jacket 13 will be ventilated through the corresponding air distribution column structure 4 and air outlet to achieve full mixing of material and process gas, improve clinker yield, and in order to avoid airflow crosstalk when the first air inlet 24 switches to the second air inlet 27, the elastic abutment component 23 makes the stationary ring 22 keep in contact with the moving ring 21 without affecting the rotation of the moving ring 21, thus ensuring the ventilation effect.

[0033] Furthermore, in this embodiment, the elastic abutment assembly 23 includes a central shaft 231, abutment plate 232, and abutment spring 233. The central shaft 231 passes through the moving ring 21 and the stationary ring 22, and the moving ring 21 can rotate relative to the central shaft 231. One end of the central shaft 231 near the moving ring 21 is provided with a limiting stop 234, and the other end passes through the abutment plate 232 and is threadedly connected to the locking member 235. The abutment plate 232 is slidably mounted on the mounting bracket 25, and the abutment spring 233 is located between the abutment plate 232 and the stationary ring 22. The stationary ring 22 and the moving ring 21 are fitted together by the limiting stop 234 at one end and the abutment spring 233 at the other end. By turning the locking member 235, the sliding of the abutment plate 232 on the mounting bracket 25 can be adjusted, thereby adjusting the abutment force of the abutment spring 233 on the stationary ring 22, which is convenient to adapt to the needs of actual production. Preferably, the moving ring 21 and the stationary ring 22 are made of graphite or silicon carbide, which are more wear-resistant and extend the service life of the moving ring 21 and the stationary ring 22. To ensure the connectivity of the gas passage and pipeline, high-temperature resistant stainless steel can be used to replace part of the graphite or silicon carbide.

[0034] Furthermore, in this embodiment, the mounting bracket 25 includes multiple mounting rods 251, which are spaced apart circumferentially along the stationary ring 22. The stationary ring 22 is disposed on each mounting rod 251, and a retaining spring 233 is sleeved on the outside of each mounting rod 251. The mounting rods 251 are spaced apart circumferentially along the stationary ring 22 to improve the installation stability of the stationary ring 22, and the retaining spring 233 is sleeved on the outside of each mounting rod 251 to improve the uniformity of the retaining force, thereby improving the stability of the air intake.

[0035] Furthermore, in this embodiment, the high-temperature rotary furnace also includes a mounting sleeve 7, which is fitted over the furnace tube 1 and is rotatable relative to the mounting sleeve 7. Multiple heating zones 71 are spaced apart along the length of the mounting sleeve 7. The mounting sleeve 7 is used to mount the furnace tube 1, and multiple heating zones 71 are set in corresponding areas of the furnace tube 1 to heat the furnace tube 1, so that the temperature inside the furnace tube 1 reaches the temperature required for the process. Preferably, the heating zones 71 can be divided into several temperature zones according to the size of the furnace chamber. Each temperature zone is relatively independent and has its own temperature control system. The heating method of the heating zones 71 can be gas heating, electric heating, coal heating, microwave heating, infrared heating, etc.

[0036] Furthermore, in this embodiment, the high-temperature rotary furnace also includes a cooling mechanism, which includes multiple air inlets 72 and multiple air outlets 73. The multiple air inlets 72 are located at the bottom of the mounting sleeve 7, and the multiple air outlets 73 are located at the top of the mounting sleeve 7. The air inlets 72 are connected to a blower 74, and the air outlets 73 are connected to an exhaust fan 75. The blower 74 delivers a large amount of cooling medium into the air inlets 72, where the cooling medium and the outer furnace tube 12 exchange heat through convection, absorbing heat, and finally the medium is discharged from the air outlets 73 through the exhaust fan 75. Preferably, the cooling medium can be air, nitrogen, argon, carbon dioxide, etc. Of course, in other embodiments, the cooling medium can also be a coolant such as water or an aqueous solution of ethylene glycol. When the cooling medium is a coolant, a condenser tube structure needs to be installed on the furnace tube 1. The cooling medium exchanges heat with the condenser tube, carrying away the heat inside the furnace shell. To accelerate the heat exchange efficiency, the heat exchange area of ​​the condenser tube can be increased. For example, a spiral finned tube structure can be used.

[0037] Furthermore, in this embodiment, the high-temperature rotary kiln also includes a lifting mechanism 61 and a hinge seat 62. The inlet end of the mounting sleeve 7 is located on the lifting mechanism 61, and the outlet end is located on the hinge seat 62. The outer furnace tube 12 has spiral plates with opposite rotation directions at both ends. The rotary drive mechanism 3 drives the furnace tube 1 to rotate in both directions. Combined with the spiral plates with opposite rotation directions at both ends of the outer furnace tube 12, the high-temperature rotary kiln can be fed and discharged. During discharge, the lifting mechanism 61 lifts the furnace head, so that the entire furnace body forms a certain angle with the horizontal plane, which can achieve rapid discharge. The tail end of the furnace is fixed by the hinge seat 62.

[0038] Furthermore, in this embodiment, the rotary drive mechanism 3 includes a driving gear 31, a driven gear 32, a spring plate, and a drive motor 33 for driving the driving gear 31 to rotate. The driven gear 32 is meshed with the driving gear 31 and is connected to the furnace tube 1 via the spring plate. The driven gear 32 is fixed to the outer furnace tube 12 via the spring plate. The drive motor 33 drives the driving gear 31 to rotate, thereby driving the driven gear 32 to rotate, ultimately causing the furnace tube 1 to rotate in both directions.

[0039] Furthermore, in this embodiment, the gas distribution column structure 4 includes a main gas channel 41 and a connecting gas channel 42. The main gas channel 41 is located outside the inner furnace tube 11, and the connecting gas channel 42 is located inside the inner furnace tube 11. The main gas channel 41 is connected to the corresponding first air inlet 24 at both ends through a connecting gas channel 42. The main gas channel 41 extends to the outermost heating zone 71, and an air outlet is located on the main gas channel 41. After the first air inlet 24 receives gas, the process gas is transferred to the main gas channel 41 through the connecting gas channel 42 and then discharged through the air outlet. The connecting gas channel 42 is located inside the inner furnace tube 11 to facilitate connection with the moving ring 21 for gas delivery. The main gas channel 41, located outside the inner furnace tube 11, extends to the outermost heating zone 71 at both ends, allowing the process gas to be evenly distributed within the heating range of the heating zone 71, thereby improving the reaction effect.

[0040] Furthermore, in this embodiment, the first air inlet 24 is a circular hole, and the second air inlet 27 is an arc-shaped waist-shaped hole located at the lower right of the stationary ring 22. Based on actual production conditions, it is shown that when the furnace tube 1 rotates, materials tend to accumulate at the lower right position of the furnace tube 1. Therefore, the second air inlet 27 is positioned in the corresponding lower right region circumferentially to ensure continuous ventilation at the material accumulation area, thereby improving the reaction effect. The arc-shaped waist-shaped design of the second air inlet 27 facilitates continuous air intake by ensuring that the first air inlet 24 passing through this region is always connected to the second air inlet 27. Specifically, eight first air inlets 24 are arranged circumferentially at intervals. The radius of the first air inlet 24 is consistent with the radius of the semicircles at both ends of the second air inlet 27. The arc length of the second air inlet 27 should be greater than the arc length required for two adjacent first air inlets 24 to alternately and continuously connect with the second air inlet 27.

[0041] Furthermore, in this embodiment, multiple lifting plates 14 are arranged circumferentially at intervals on the inner side of the outer furnace tube 12. The lifting plates 14 can appropriately turn the material, avoid excessive accumulation of material, and increase the contact area and reaction effect with the process gas. Of course, in other embodiments, when space constraints make it inconvenient to arrange the lifting plates 14, making the outer furnace tube 12 into a polygon also has a certain turning effect.

[0042] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A high-temperature rotary furnace, characterized in that: The furnace tube (1) includes a furnace tube (1) and a rotary drive mechanism (3) for driving the furnace tube (1) to rotate. The furnace tube (1) includes an inner furnace tube (11) and an outer furnace tube (12). A storage jacket (13) is formed between the inner furnace tube (11) and the outer furnace tube (12). The input end and output end of the furnace tube (1) are respectively connected to a feed buffer chamber (51) and a discharge chamber (52) that communicate with the storage jacket (13). The inner furnace tube (11) has multiple gas distribution column structures (4) arranged circumferentially. The gas distribution column structure (4) is provided with multiple gas outlet holes facing the storage jacket (13). Both ends of the inner furnace tube (11) are connected to an air inlet connector (2). The air inlet connector (2) includes a moving ring (21) and a stationary ring. (22) and elastic abutment component (23), the moving ring (21) is installed on the inner furnace tube (11), the moving ring (21) is provided with a plurality of first air inlets (24) that correspond one-to-one with the plurality of gas distribution column structures (4) along the circumferential direction, the stationary ring (22) is provided on the mounting bracket (25) and abuts against the moving ring (21) through the elastic abutment component (23), the stationary ring (22) is connected to the air inlet pipe (26), and a second air inlet (27) is provided on the side facing the moving ring (21), the second air inlet (27) is located in the circumferential area corresponding to the material accumulation in the furnace tube (1) when the furnace tube (1) rotates, and the second air inlet (27) is always connected to at least one first air inlet (24).

2. The high-temperature rotary furnace according to claim 1, characterized in that: The elastic abutment assembly (23) includes a central shaft (231), abutment plate (232) and abutment spring (233). The central shaft (231) passes through the moving ring (21) and the stationary ring (22). The moving ring (21) can rotate relative to the central shaft (231). The central shaft (231) has a limiting stop (234) at one end near the moving ring (21), and the other end passes through the abutment plate (232) and is threadedly connected to the locking member (235). The abutment plate (232) slides on the mounting bracket (25), and the abutment spring (233) is located between the abutment plate (232) and the stationary ring (22).

3. The high-temperature rotary furnace according to claim 2, characterized in that: The mounting bracket (25) includes multiple mounting rods (251), which are arranged at intervals along the circumference of the stationary ring (22). The stationary ring (22) is provided on each mounting rod (251), and the clamping spring (233) is sleeved on each mounting rod (251).

4. The high-temperature rotary furnace according to claim 1, characterized in that: The high-temperature rotary furnace also includes an installation sleeve (7), which is sleeved outside the furnace tube (1) and the furnace tube (1) can rotate relative to the installation sleeve (7). Multiple heating zones (71) are arranged at intervals along the length direction inside the installation sleeve (7).

5. The high-temperature rotary furnace according to claim 4, characterized in that: The high-temperature rotary furnace also includes a cooling mechanism, which includes multiple air inlets (72) and multiple air outlets (73). The multiple air inlets (72) are located at the bottom of the mounting sleeve (7), and the multiple air outlets (73) are located at the top of the mounting sleeve (7). The air inlets (72) are connected to a blower (74), and the air outlets (73) are connected to an exhaust fan (75).

6. The high-temperature rotary furnace according to claim 4, characterized in that: The high-temperature rotary furnace also includes a lifting mechanism (61) and a hinge seat (62). The feeding end of the mounting sleeve (7) is located on the lifting mechanism (61), and the discharging end is located on the hinge seat (62). The outer furnace tube (12) has spiral plates with opposite rotation directions at both ends.

7. The high-temperature rotary furnace according to claim 6, characterized in that: The rotary drive mechanism (3) includes a drive gear (31), a driven gear (32), a spring plate, and a drive motor (33) for driving the drive gear (31) to rotate. The driven gear (32) meshes with the drive gear (31) and is connected to the furnace tube (1) through the spring plate.

8. The high-temperature rotary furnace according to any one of claims 1 to 7, characterized in that: The gas distribution column structure (4) includes a main gas channel (41) and a connecting gas channel (42). The main gas channel (41) is located outside the inner furnace tube (11), and the connecting gas channel (42) is located inside the inner furnace tube (11). The main gas channel (41) is connected to the first air inlet (24) at both ends through a connecting gas channel (42). The main gas channel (41) extends to the outermost heating zone (71), and the air outlet is located on the main gas channel (41).

9. The high-temperature rotary furnace according to any one of claims 1 to 7, characterized in that: The first air inlet (24) is a round hole, and the second air inlet (27) is an arc-shaped waist-shaped hole, which is located to the lower right of the stationary ring (22).

10. The high-temperature rotary furnace according to any one of claims 1 to 7, characterized in that: The outer furnace tube (12) has multiple lifting plates (14) arranged circumferentially on its inner side, or the outer furnace tube (12) is polygonal.

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