An ultra-high temperature continuous rotary kiln

Abstract

This invention discloses an ultra-high temperature continuous rotary kiln, belonging to the field of rotary kiln technology. It includes a furnace tube assembly and a sealing assembly driven by a drive component to rotate. The furnace tube assembly includes a first furnace tube in the middle and second furnace tubes at both ends. The first furnace tube uses carbon fiber as the matrix. A feeding component is provided at one end of the furnace tube assembly, and a discharging component is provided at the other end. The sealing assembly includes a main sealing shell for sealing the furnace tube assembly and end sealing shells for sealing the feeding and discharging components respectively. The main sealing shell and the end sealing shells are connected by a connecting sleeve. A heater for heating the furnace tube assembly is provided inside the main sealing shell. Interfaces for introducing inert gas into the shell are provided on the main sealing shell and on the feeding and / or discharging components. This invention addresses the technical problems of existing rotary kilns, such as a maximum operating temperature not exceeding 1100℃, the risk of metal contamination, poor airtightness, and the inability to achieve ultra-high temperature continuous processing.

Description

Technical Field

[0001] This invention belongs to the field of rotary kiln technology, specifically an ultra-high temperature continuous rotary kiln. Background Technology

[0002] A rotary kiln is a device that heat-treats solid materials at high temperatures and is widely used in metallurgy, chemical industry, building materials, environmental protection and other fields. The working principle of a rotary kiln is that the material is added into the furnace tube from the feed end. The furnace tube rotates slowly under the drive of the transmission device. The material moves axially inside the furnace tube and is heated by the heating device to achieve the required heat treatment effect. Then it is discharged from the discharge end.

[0003] Currently, with the development of new energy, new materials and other fields, the demand for high-temperature heat treatment equipment is increasing. For example, in the new energy field, the negative and positive electrode materials of lithium-ion batteries need to undergo calcination and purification processes at high temperatures; in the semiconductor field, substrate materials such as aluminum nitride and silicon nitride need to be prepared at high temperatures; in the polymetallic mineral field, ilmenite, vanadium-titanium magnetite, etc., need to be reduced at high temperatures; and in the coal chemical industry, coke or lignite needs to be pyrolyzed at high temperatures. All these processes require high-temperature continuous rotary kilns as core equipment.

[0004] However, existing rotary kiln technology has the following problems:

[0005] First, the maximum operating temperature of traditional rotary kilns does not exceed 1100℃, which cannot meet the high-temperature requirements below 2800℃. This is because traditional rotary kilns use metal or ceramic materials to make furnace tubes, which are prone to deformation, creep, oxidation, and corrosion at high temperatures, affecting their service life and stability.

[0006] Secondly, traditional rotary kilns pose a risk of metal contamination. This is because traditional rotary kilns use furnace tubes made of materials such as metal or ceramics, which react or diffuse with the materials at high temperatures, resulting in the inclusion of metal elements or impurities in the materials, affecting their purity and performance.

[0007] Third, traditional rotary kilns suffer from poor airtightness. This is because traditional rotary kilns use dynamic or static sealing methods for their end caps, which are prone to leakage or damage at high temperatures. This allows oxygen from the air to enter the furnace, reacting with or oxidizing the materials or furnace tubes, thus affecting their quality and safety.

[0008] Fourth, in order to achieve ultra-high temperature carbonization, the traditional furnace process is used, in which the entire process is separate. The material is fed on a conveyor belt, and after being carbonized at high temperature in the cylinder, it is cooled and poured out. This method is not a continuous process, is inefficient, and inconvenient to use.

[0009] Therefore, there is an urgent need for an ultra-high temperature continuous rotary kiln to solve the above problems. Summary of the Invention

[0010] To address the above problems, this invention provides an ultra-high temperature continuous rotary kiln, which solves the technical problems of existing rotary kilns, such as the maximum operating temperature not exceeding 1100℃, the risk of metal contamination, poor airtightness, and the inability to achieve ultra-high temperature continuous processing.

[0011] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0012] An ultra-high temperature continuous rotary kiln includes a furnace tube assembly driven to rotate by a drive assembly and a sealing assembly that wraps around the furnace tube assembly.

[0013] The furnace tube assembly includes a first furnace tube in the middle and second furnace tubes at both ends; the first furnace tube uses carbon fiber as the matrix.

[0014] The furnace tube assembly is provided with a feeding component at one end and a discharging component at the other end;

[0015] The sealing assembly includes a main sealing housing for sealing the furnace tube assembly and end sealing housings for sealing the feeding assembly and the discharging assembly respectively; the main sealing housing and the end sealing housing are connected by a connecting sleeve;

[0016] The main sealing housing is equipped with a heater for heating the furnace tube assembly;

[0017] The main sealing housing is provided with an interface for filling the housing with inert gas;

[0018] The feeding assembly and / or discharging assembly are provided with an interface for introducing inert gas into the furnace tube assembly.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] The present invention uses a furnace tube with carbon fiber as the matrix, which can achieve a long-term working temperature below 2800℃ and has good properties such as corrosion resistance, oxidation resistance, deformation resistance and creep resistance, thereby improving the service life and stability of the rotary kiln.

[0021] This invention employs a fully enclosed, airtight structural component, which effectively prevents oxygen from the air from entering the furnace, ensuring the purity and safety of the materials. Simultaneously, inert gas is introduced into the main sealing shell and the feeding and / or discharging components through interfaces to ensure an oxygen-free atmosphere within the equipment.

[0022] As a further improvement to the above solution, a thermal insulation layer is provided inside the main sealing housing; the thermal insulation layer is located between the main sealing housing and the heater.

[0023] The above-mentioned improvements have the following effects: by setting a heat insulation layer inside the main sealing shell, the heat loss of the furnace tube assembly can be reduced, the thermal efficiency can be improved, and energy can be saved; the heat insulation layer is located between the main sealing shell and the heater, which can prevent the heater from overheating the main sealing shell, protect the structure and performance of the main sealing shell, and extend its service life.

[0024] As a further improvement to the above solution, a circulating water cooling assembly is provided on the outer wall of the main sealing housing and / or connecting sleeve.

[0025] The above-mentioned improvements have the following effects: by installing a circulating water cooling component on the outer wall of the main sealing shell and / or connecting sleeve, the temperature of the main sealing shell and / or connecting sleeve can be effectively reduced, preventing them from deforming or being damaged due to high temperature, and ensuring sealing performance and mechanical strength.

[0026] As a further improvement to the above solution, a retaining ring is provided between the connecting sleeve and the second furnace tube. A limit ring is provided on one side of the retaining ring, and a mounting ring is provided on the other side. A sealing ring and a through groove are provided inside the mounting ring. Pressure gauges are provided on both the connecting sleeve and the main sealing housing.

[0027] The above-mentioned improved technical effects are as follows: the pressure gauge monitors the pressure difference, and the seal is automatically formed by the action of the retaining ring and the sealing ring. The gas in the exhaust gas emission component in the end sealing housing flows out to the outside, which can prevent smoke and dust from entering the main sealing housing.

[0028] As a further improvement to the above solution, the end-sealing housing is provided with an interface for filling inert gas.

[0029] The improved technology achieves the following effect: by introducing inert gas through the interface, an oxygen-free atmosphere is ensured inside the sealed housing.

[0030] As a further improvement to the above solution, the furnace tube assembly is rotatably connected to the exhaust gas emission assembly; the exhaust gas emission assembly is provided with an exhaust port at the upper end and a slag discharge port at the lower end.

[0031] The above-mentioned improvements have the following effects: the exhaust gas emission assembly is rotatably connected to the end of the furnace tube assembly, which can effectively collect and discharge the exhaust gas inside the furnace tube, reduce environmental pollution, and improve the quality of heat treatment; the exhaust gas emission assembly is provided with an exhaust port at the upper end, which can easily discharge the exhaust gas; the exhaust gas emission assembly is provided with a slag discharge port at the lower end, which can discharge the solid residue generated inside the furnace tube.

[0032] As a further improvement to the above scheme, the feeding assembly includes a screw conveyor; a feeding hopper is provided on the upper side wall of the screw conveyor; the feeding hopper extends out through the end sealing shell; and the output end of the screw conveyor extends into the second furnace tube through the exhaust gas emission assembly.

[0033] The technical effects of the above improvements are as follows: using a screw conveyor as a feeding component can achieve continuous, uniform, and controllable feeding of materials, thereby improving the efficiency and uniformity of heat treatment; the upper side wall of the screw conveyor is equipped with a feeding hopper, which can conveniently put materials into the screw conveyor.

[0034] As a further improvement to the above solution, the discharge assembly is a shell structure, with one side rotatably connected to the second furnace tube, an observation window on the other side, and a discharge port at the lower end.

[0035] The improved technical effects are as follows: the shell-structured discharge assembly can effectively collect and discharge materials inside the furnace tube; one side of the discharge assembly is rotatably connected to the second furnace tube, enabling synchronous movement with the furnace tube and ensuring the continuity and uniformity of the discharge; an observation window is provided on the other side of the discharge assembly, allowing for direct observation of the materials inside the furnace tube, monitoring the heat treatment process and results, and timely detection and handling of abnormalities; a discharge port is provided at the lower end of the discharge assembly, facilitating the discharge of heat-treated materials.

[0036] As a further improvement to the above solution, the second furnace tube is made of metal.

[0037] The above-mentioned improvements have the following effects: they enhance the wear resistance and corrosion resistance of the furnace tube assembly and extend the service life of the furnace tube.

[0038] As a further improvement to the above solution, the furnace tube assembly is provided with support components at both ends; the drive assembly includes a driven wheel disposed on the second furnace tube and a drive wheel connected to the drive motor; the drive wheel and the driven wheel constitute a gear transmission mechanism or a sprocket transmission mechanism.

[0039] The technical effects of the above improvements are as follows: setting support components at both ends of the furnace tube assembly can effectively support and fix the furnace tube, ensuring the balance and stability of the furnace tube; using a gear transmission mechanism or sprocket transmission mechanism composed of a drive wheel and a driven wheel can achieve smooth and reliable transmission of the furnace tube, reduce transmission noise and loss, and extend the service life of transmission components. Attached Figure Description

[0040] Figure 1 This is the assembly drawing of the present invention.

[0041] Figure 2 This is a schematic diagram of the driving component structure in this invention.

[0042] Figure 3 This is a schematic diagram of the end-sealing housing in this invention.

[0043] Figure 4 for Figure 3 Enlarged diagram of point A in the middle.

[0044] Figure 5 This is a schematic diagram of the screw feeder in this invention.

[0045] Figure 6 This is a schematic diagram of the connection structure between the furnace tube assembly and the main sealing shell in this invention.

[0046] In the diagram: 1. Feed hopper; 2. Guide hopper; 3. End sealing shell; 301. Shell body; 302. Circular sleeve; 303. First flange; 304. Inspection port; 305. Fixing plate; 4. Feeding assembly; 6. Mounting plate; 7. Exhaust gas emission assembly; 8. Drive wheel; 9. Drive motor; 10. Mounting bracket; 11. Frame; 12. Discharge assembly; 13. First furnace tube; 14. Circulating water cooling assembly; 15. Main sealing shell; 16. Second furnace tube; 17. Connecting sleeve ; 18. Column; 19. First connecting seat; 20. Second connecting seat; 21. First connecting ring; 22. Third flange; 23. Driven wheel; 24. Second connecting ring; 25. Base frame; 26. Double ring; 27. Observation window; 28. Interface; 29. ​​Heater; 30. Thermal insulation layer; 31. Positioning ring; 32. First retaining ring; 34. Second retaining ring; 35. Mounting seat; 36. Limiting ring; 37. Retaining ring; 38. Through groove; 39. Sealing ring; 40. Mounting ring. Detailed Implementation

[0047] To enable those skilled in the art to better understand the technical solution, the technical solution is described in detail below with reference to the embodiments. The description in this part is only exemplary and explanatory, and should not limit the scope of protection of this patent in any way.

[0048] Please see Figures 1 to 6 In one specific embodiment, an ultra-high temperature continuous rotary kiln includes a furnace tube assembly driven to rotate by a drive assembly and a sealing assembly that wraps around the furnace tube assembly.

[0049] The furnace tube assembly includes a first furnace tube 13 in the middle and second furnace tubes 16 at both ends; the first furnace tube 13 uses carbon fiber as the matrix;

[0050] The furnace tube assembly is equipped with a feeding component 4 at one end and a discharging component 12 at the other end;

[0051] The sealing assembly includes a main sealing housing 15 for sealing the furnace tube assembly and end sealing housings 3 for sealing the feeding assembly 4 and the discharging assembly 12 respectively; the main sealing housing 15 and the end sealing housings 3 are connected by a connecting sleeve 17.

[0052] A heater 29 for heating the furnace tube assembly is provided inside the main sealing housing 15;

[0053] The main sealing housing 15 is provided with an interface 28 for filling the housing with inert gas;

[0054] The feeding assembly 4 and / or the discharging assembly 12 are provided with an interface 28 for introducing inert gas into the furnace tube assembly.

[0055] Specifically, firstly, the material to be heat-treated is fed into the screw conveyor through the feed hopper 1, and the screw conveyor continuously and evenly feeds the material into the second furnace tube 16;

[0056] Secondly, the drive motor 9 drives the furnace tube assembly to rotate through the drive wheel 8 and the driven wheel 23, so that the material is subjected to centrifugal force inside the furnace tube and moves forward along the inner wall of the furnace tube.

[0057] Secondly, heater 29 heats the furnace tube assembly, causing the internal temperature of the furnace tube to reach ultra-high temperature, thus performing efficient heat treatment on the material.

[0058] At the same time, inert gas is introduced into the main sealing housing 15 and / or the furnace tube assembly through interface 28 to form an inert atmosphere and prevent the material from oxidizing and corroding at high temperatures.

[0059] Finally, after a certain period of heat treatment, the material enters the discharge assembly 12 from the second furnace tube 16 and is discharged.

[0060] The first furnace tube 13 uses carbon fiber as the matrix, which can be pure carbon or composited with materials such as silicon, boron, and tungsten to ensure its mechanical and physical properties at high temperatures, enabling it to withstand temperatures exceeding 2800℃. The second furnace tube 16 is made of metal. The inner cavity of the furnace tube assembly is conical; the diameter is smaller at the end facing the feeding assembly 4 and larger at the end facing the discharging assembly 12, facilitating the removal of materials.

[0061] To ensure the airtightness and thermal insulation performance of the furnace tube structure, the feeding assembly 4, the discharging assembly 12, and both ends of the furnace tube structure are housed within the end sealing shell 3. The end sealing shell 3 prevents air or other gases from entering or leaking. The main sealing shell 15 is equipped with an interface 28 for introducing inert gas into the shell, and the feeding assembly 4 and / or the discharging assembly 12 are equipped with interfaces 28 for introducing inert gas into the furnace tube assembly. Interfaces 28 continuously supply inert gas into the shell and the furnace tube assembly, ensuring an oxygen-free environment for the main sealing shell 15, the feeding assembly 4, and the discharging assembly 12. The first furnace tube 13 can be an integral structure or assembled using bolts, flanges, adhesives, etc.

[0062] like Figure 6 As shown, in a preferred embodiment of the above, a thermal insulation layer 30 is provided inside the main sealing housing 15; the thermal insulation layer 30 is located between the main sealing housing 15 and the heater 29.

[0063] Specifically, a thermal insulation layer 30 is provided inside the main sealing shell 15, located between the main sealing shell 15 and the heater 29. This reduces heat loss from the furnace tube assembly, improves thermal efficiency, and saves energy. It also prevents the heater 29 from overheating the main sealing shell 15, protecting its structure and performance. The thermal insulation layer 30 and the heater 29 are mounted on a partition, with a gap between the inner diameter of the partition and the furnace tube assembly. A thermal insulation layer 30 is also provided inside the arc-shaped section of the main sealing shell 15.

[0064] like Figure 1 , Figure 3 and Figure 6 As shown, in a preferred embodiment, a circulating water cooling assembly 14 is provided on the outer wall of the main sealing housing 15 and / or the connecting sleeve 17. This effectively reduces the temperature of the main sealing housing 15 and / or the connecting sleeve 17, preventing deformation or damage due to high temperature and ensuring sealing performance and mechanical strength. The circulating water cooling assembly 14 utilizes water recycling, saving water resources and reducing environmental pollution. The circulating water cooling assembly 14 has an inlet and an outlet at its upper and lower ends. The main sealing housing 15 is mounted on the mounting plate 6 via a base frame 25, and the mounting plate 6 is mounted on the frame 11.

[0065] like Figure 1 , Figure 3 and Figure 4 As shown, in a preferred embodiment of the above, a retaining ring 37 is provided between the connecting sleeve 17 and the second furnace tube 16. A limiting ring 36 is provided on one side of the retaining ring 37, and an installation ring 40 is provided on the other side. A sealing ring 39 and a through groove 38 are provided inside the installation ring 40.

[0066] Specifically, pressure gauges are installed on both the connecting sleeve 17 and the main sealing housing 15 to monitor the pressure difference. During the reaction, some exhaust gas is generated and discharged through the exhaust gas emission assembly 7. During the discharge process, the exhaust gas may flow into the end sealing housing 3, which is connected to the main sealing housing 15 via the connecting sleeve 17. To prevent the exhaust gas from entering the main sealing housing 15, a retaining ring 37 is installed in the connecting sleeve 17. A limiting ring 36 is provided on one side of the retaining ring 37 to limit its movement. The sealing ring 39 installed in the mounting ring 40 automatically forms a seal against the retaining ring 37 under the pressure difference in the through groove 38, thereby effectively preventing the gas in the exhaust gas emission assembly 7 in the end sealing housing 3 from flowing out and preventing dust from entering the main sealing housing 15. Even if the sealing ring 39 is worn thin, it can still automatically form a seal. Bearings are provided at the connection between the retaining ring 37 and the mounting ring 40 and the second furnace tube 16.

[0067] like Figure 1 As shown, in a preferred embodiment of the above, the end-sealing housing 3 is provided with an interface 28 for filling with inert gas.

[0068] Specifically, to ensure airtightness, the end-sealing housing 3 at the inlet and outlet ends adopts a fully enclosed structure to prevent oxygen from entering the gas. The feeding assembly 4 and the discharging assembly 12 are installed inside the end-sealing housing 3. Before starting the furnace, a vacuum can be drawn or an inert gas (nitrogen, argon, etc.) can be used to ensure an oxygen-free atmosphere inside the equipment. The end-sealing housing 3 includes a gas housing body 301. One side of the housing body 301 is provided with an inspection port 304 through a first flange 303, and the other side of the housing body 301 is connected to a fixed plate 305 through a round sleeve 302. A connecting sleeve 17 is inserted into the fixed plate 305. This structural design facilitates a tight connection with the connecting sleeve 17.

[0069] like Figure 1 As shown, in a preferred embodiment, the furnace tube assembly is rotatably connected to the exhaust gas emission assembly 7; the upper end of the exhaust gas emission assembly 7 is provided with an exhaust port, which can conveniently discharge the exhaust gas; the lower end is provided with a slag discharge port, which can discharge the solid residue generated inside the furnace tube.

[0070] like Figure 5 As shown, in a preferred embodiment of the above, the feeding assembly 4 includes a screw conveyor; a feeding hopper 1 is provided on the upper side wall of the screw conveyor; the feeding hopper 1 extends out through the end sealing housing 3; the output end of the screw conveyor extends into the second furnace tube 16 through the exhaust gas emission assembly 7.

[0071] Specifically, one side of the screw feeder is located inside the second furnace tube 16, the middle part is connected to the side end of the exhaust gas emission assembly 7 via a double ring 26, and the other side is connected to the column 18 via a second connecting ring 24. The screw feeder is connected to the feed hopper 1 via the guide hopper 2. Simultaneously, the feed end adopts a double-hopper, double-valve structure. During the feeding process, the lower feed hopper is first evacuated or purged with inert gas, and the double valves ensure airtightness during feeding.

[0072] like Figure 1 As shown, in a preferred embodiment of the above, the discharge assembly 12 is a shell structure, one side is rotatably connected to the second furnace tube 16, the other side is provided with an observation window 27, and the lower end is provided with a discharge port.

[0073] Specifically, the discharge port of the discharge assembly 12 has a valve. After material accumulates at the discharge assembly 12, the valve opens intermittently to discharge material without affecting continuous production. To ensure the clarity and safety of the observation window 27, the observation window 27 is made of high-strength, high-transmittance, high-temperature resistant, and corrosion-resistant materials. The observation window 27 is installed inside the mounting base 35, which can fix and protect the observation window 27, preventing it from being impacted or contaminated by external factors.

[0074] like Figure 1 and Figure 2 As shown, in a preferred embodiment, the furnace tube assembly is provided with support components at both ends; the drive assembly includes a driven wheel 23 disposed on the second furnace tube 16 and a drive wheel 8 connected to the drive motor 9; the drive wheel 8 and the driven wheel 23 constitute a gear transmission mechanism or a sprocket transmission mechanism.

[0075] Specifically, the furnace tube assembly is driven to rotate by a drive motor 9, a driving wheel 8, a driven wheel 23, and a transmission mechanism. The support assembly includes a mounting bracket 10, which is a support structure that provides support. The mounting bracket 10 is connected to a second connecting bracket 20 via a first connecting seat 19. Their function is to adjust the distance between the mounting bracket 10 and the second furnace tube 16 to a suitable range and maintain stability. The second connecting bracket 20 is connected to a third flange 22 via a first connecting ring 21 to accommodate the rotational movement of the furnace tube structure.

[0076] One end of the first furnace tube 13 is connected to the second furnace tube 16 via a positioning ring 31 and a first retaining ring 32, and the other end is connected via a second retaining ring 34. The first furnace tube 13 is a carbon fiber furnace tube, designed to withstand temperatures exceeding 2800℃ and to facilitate chemical reactions or physical changes in materials at high temperatures. The positioning ring 31 secures the positional relationship between the first and second furnace tubes 13. The second furnace tube 16 is a metal furnace tube connected to the first furnace tube 13. One end of the second furnace tube 16 is connected to the discharge assembly 12. Finally, the other end of the first furnace tube 13 is connected to another second furnace tube 16 via a second retaining ring 34, and this second second furnace tube 16 is connected to the feeding assembly 4.

[0077] Tables 1, 2, and 3 below show a comparison of the capacity and operating temperature of rotary kilns, roller kilns, conventional rotary kilns, Atchison furnaces, box furnaces, and pusher kilns in this application.

[0078] Table 1

[0079]

[0080]

[0081] Table 2

[0082]

[0083] Table 3

[0084]

[0085]

[0086] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Specific examples have been used in this document to illustrate the principles and implementation methods of the patent's technical solution. These examples are merely to aid in understanding the method and core ideas of this patent. The above are only preferred embodiments of this patent. It should be pointed out that, due to the limitations of written expression and the objective existence of an infinite number of specific structures, those skilled in the art can make various improvements, modifications, or variations without departing from the principles of this patent, and can also combine the above technical features in an appropriate manner. These improvements, modifications, variations, or combinations, or the direct application of the patent's concept and technical solution to other situations without modification, should all be considered within the scope of protection of this patent.

Claims

1. An ultra-high temperature continuous rotary kiln characterized by, This includes a furnace tube assembly that is driven to rotate by a drive component and a sealing component that encloses the furnace tube assembly; The furnace tube assembly includes a first furnace tube (13) in the middle and second furnace tubes (16) at both ends; the first furnace tube (13) is made of carbon fiber as the matrix; the second furnace tubes (16) are made of metal. The furnace tube assembly is provided with a feeding assembly (4) at one end and a discharging assembly (12) at the other end. The sealing assembly includes a main sealing housing (15) for sealing the furnace tube assembly and end sealing housings (3) for sealing the feeding assembly (4) and the discharging assembly (12) respectively; the main sealing housing (15) and the end sealing housings (3) are connected by a connecting sleeve (17); The main sealing housing (15) is provided with a heater (29) for heating the furnace tube assembly; the main sealing housing (15) is provided with a heat insulation layer (30); the heat insulation layer (30) is located between the main sealing housing (15) and the heater (29); the main sealing housing (15) and / or the connecting sleeve (17) are provided with a circulating water cooling assembly (14). A retaining ring (37) is provided between the connecting sleeve (17) and the second furnace tube (16). A limiting ring (36) is provided on one side of the retaining ring (37), and an installation ring (40) is provided on the other side. A sealing ring (39) and a through groove (38) are provided inside the installation ring (40). The main sealing housing (15) is provided with an interface (28) for filling the housing with inert gas; the end sealing housing (3) is provided with an interface (28) for filling with inert gas. The feeding assembly (4) and / or discharging assembly (12) are provided with an interface (28) for filling the furnace tube assembly with inert gas.

2. The ultra-high temperature continuous rotary kiln according to claim 1, characterized in that, The furnace tube assembly is rotatably connected to the exhaust gas emission assembly (7); the exhaust gas emission assembly (7) has an exhaust port at the upper end and a slag discharge port at the lower end.

3. The ultra-high temperature continuous rotary kiln according to claim 1, characterized in that, The feeding assembly (4) includes a screw conveyor; a feeding hopper (1) is provided on the upper side wall of the screw conveyor; the feeding hopper (1) extends out through the end sealing housing (3); the output end of the screw conveyor extends into the second furnace tube (16) through the exhaust gas emission assembly (7).

4. The ultra-high temperature continuous rotary kiln according to claim 1, characterized in that, The discharge assembly (12) is a shell structure, with one side rotatably connected to the second furnace tube (16), the other side having an observation window (27), and the lower end having a discharge port.

5. The ultra-high temperature continuous rotary kiln according to claim 1, characterized in that, The furnace tube assembly is provided with support components at both ends; the drive assembly includes a driven wheel (23) on the second furnace tube (16) and a drive wheel (8) connected to the drive motor (9); the drive wheel (8) and the driven wheel (23) constitute a gear transmission mechanism or a sprocket transmission mechanism.

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