Combustion radiation heated rotary kiln

Abstract

A kind of combustion radiation heating rotary kiln, including feeding mechanism, furnace core pipe, radiation combustion mechanism, driving mechanism, sealing mechanism and material receiving mechanism;The feeding mechanism is located in one end of the furnace core pipe, the feeding mechanism is used to input material to the furnace core pipe, the material receiving mechanism is located in the other end of the furnace core pipe, the material receiving mechanism is used to receive the material output through the furnace core pipe;The sealing mechanism is separately arranged at the connection of the furnace core pipe and the feeding mechanism and the material receiving mechanism;The radiation combustion mechanism heats the material in the inside of the furnace core pipe by heat radiation;The driving mechanism is used to drive the rotation of the furnace core pipe.The combustion radiation heating rotary kiln of the present application heats the inside of the furnace core pipe by radiation combustion mechanism, improves the heating efficiency, reduces corrosion, improves the sintering quality by driving mechanism driving the rotation of the furnace core pipe, and enhances the sealing by setting sealing mechanism.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kiln equipment, and particularly relates to a combustion radiation heating rotary kiln. BACKGROUND

[0002] During the sintering process, various materials may be corrosive to the kiln, such as fluorine-containing materials, sulfur-containing materials or chlorine-containing materials. When the above corrosive materials are sintered in the kiln, they are in contact with the combustion gases (such as oxygen, carbon dioxide, water vapor and possibly nitrogen oxides, etc.), and complex chemical reactions may occur. These reactions may intensify the corrosiveness of the materials, or new corrosive substances may be generated. If the outer wall of the core tube is heated, it is difficult to reach the reaction temperature inside the core tube. SUMMARY

[0003] In view of the problems in the background art, the present application aims to provide a combustion radiation heating rotary kiln, which solves the problem that the contact between the combustion gases in the core tube and the corrosive materials easily leads to safety accidents.

[0004] To achieve the above object, the present application adopts the following technical scheme:

[0005] A combustion radiation heating rotary kiln comprises a feeding mechanism, a core tube, a radiation combustion mechanism, a driving mechanism, a sealing mechanism and a material receiving mechanism.

[0006] The feeding mechanism is arranged at one end of the core tube, and is used to input materials into the core tube. The material receiving mechanism is arranged at the other end of the core tube, and is used to receive the materials output from the core tube.

[0007] The sealing mechanism is arranged at the connection between the core tube and the feeding mechanism and the material receiving mechanism.

[0008] The radiation combustion mechanism heats the materials in the core tube by heat radiation.

[0009] The driving mechanism is used to drive the rotation of the core tube.

[0010] Preferably, the radiation combustion mechanism comprises a combustion nozzle and a radiation tube. The combustion nozzle is arranged on the side wall of the kiln. One end of the radiation tube is connected to the combustion nozzle, and the other end of the radiation tube is suspended in the interior of the kiln.

[0011] The combustion nozzle comprises a fuel gas pipeline, an auxiliary combustion gas pipeline and an exhaust pipeline. The fuel gas pipeline, the auxiliary combustion gas pipeline and the exhaust pipeline are located outside the kiln.

[0012] Preferably, the radiation tube is a recrystallized silicon carbide tube.

[0013] Preferably, the feeding mechanism comprises a supporting seat, a hopper, a feeder and a feeding cover;

[0014] The feeding cover is arranged at one end of the core pipe through the sealing mechanism, and the feeding cover is in communication with the hopper;

[0015] The hopper and the feeder are installed on the supporting seat, the power end of the feeder is located inside the hopper, and the feeder is used for feeding materials into the feeding cover.

[0016] Preferably, the receiving mechanism comprises a discharging cover, a receiving barrel and a control assembly;

[0017] The discharging cover is arranged at the other end of the core pipe through another sealing mechanism, the receiving barrel is used for receiving materials discharged from the discharging cover, the control assembly is arranged between the discharging cover and the receiving barrel, and the control assembly is used for controlling the communication or closure between the discharging cover and the receiving barrel.

[0018] Preferably, the feeding cover, the core pipe and the discharging cover constitute the kiln;

[0019] The combustion nozzle is installed on the discharging cover, and the radiation pipe is arranged along the length direction of the core pipe;

[0020] The outer wall of the core pipe is provided with heat insulation cotton.

[0021] Preferably, the combustion gas pipeline and the exhaust pipeline are in communication through a connecting pipe.

[0022] Preferably, a thermocouple is arranged on the discharging cover and extends into the interior of the kiln.

[0023] Preferably, the sealing mechanism comprises a sealing shell, a sealing assembly and a fixed ring;

[0024] The sealing assembly is arranged at the inner ring of the sealing shell, the fixed ring is fixedly connected with the core pipe, and the fixed ring is rotationally connected with the inner ring of the sealing shell through the sealing assembly.

[0025] Preferably, the fixed ring and the core pipe have a heat insulation cavity therebetween.

[0026] The sealing assembly comprises two groups of packing sealing ropes, an isolation cavity is formed between the two groups of packing sealing ropes, the sealing shell is provided with an oil filling hole, and the oil filling hole is in communication with the isolation cavity.

[0027] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0028] The combustion radiation heating rotary kiln of the present application heats the inside of the furnace core pipe through the radiation combustion mechanism, improves the heating efficiency and reduces corrosion, drives the furnace core pipe to rotate through the driving mechanism to improve the sintering quality, and enhances the sealing performance through the sealing mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a structural schematic diagram of an embodiment of the present application;

[0030] Figure 2 is a structural schematic diagram of the radiation combustion mechanism of the present application;

[0031] Figure 3 is Figure 1 is an enlarged schematic diagram of A in FIG. 1.

[0032] Wherein: the feeding mechanism 1, the stock bin 11, the feeder 12, the feeding cover 13, the support seat 14, the furnace core pipe 2, the heat preservation cotton 21, the radiation combustion mechanism 3, the combustion nozzle 31, the fuel gas pipeline 311, the combustion supporting gas pipeline 312, the exhaust gas pipeline 313, the connecting pipe 314, the radiation pipe 32, the driving mechanism 4, the sealing mechanism 5, the sealing shell 51, the inner ring 511, the oil filling hole 512, the sealing assembly 52, the packing sealing rope 521, the isolation cavity 522, the fixed circular ring 53, the heat insulation cavity 531, the receiving mechanism 6, the discharging cover 61, the receiving barrel 62, the control assembly 63 and the thermocouple 7. DETAILED DESCRIPTION

[0033] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0034] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0035] In addition, the terms "first", "second" and "third" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" and "third" can explicitly or implicitly include one or more of the features.

[0036] It should be noted that unless specifically defined otherwise, the terms "mounting", "connected", "connection" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integral connection, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through an intermediate medium, and can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] The technical solutions of the present application will be further illustrated below in combination with the accompanying drawings Figures 1 to 3 And the technical solutions of the present application are further illustrated by specific embodiments.

[0038] A combustion radiation heating rotary kiln, comprising a feeding mechanism 1, a core tube 2, a radiation combustion mechanism 3, a driving mechanism 4, a sealing mechanism 5 and a receiving mechanism 6;

[0039] The feeding mechanism 1 is arranged at one end of the core tube 2, and the feeding mechanism 1 is used for inputting materials into the core tube 2, and the receiving mechanism 6 is arranged at the other end of the core tube 2, and the receiving mechanism 6 is used for receiving materials output from the core tube 2;

[0040] The sealing mechanism 5 is arranged at the connection between the core tube 2 and the feeding mechanism 1 and the receiving mechanism 6;

[0041] The radiation combustion mechanism 3 heats the materials in the interior of the core tube 2 through heat radiation;

[0042] The driving mechanism 4 is used for driving the core tube 2 to rotate.

[0043] The sintering process of the rotary kiln of the present application can effectively transfer heat to the materials by inputting the materials from the feeding mechanism 1 into the interior of the core tube 2 and directly radiating and heating the materials in the interior of the core tube 2 through the radiation combustion mechanism 3. This method can not only avoid the safety hazards caused by the reaction of the gases (such as oxygen, carbon dioxide, water vapor and possible nitrogen oxides) generated by combustion and the corrosive materials in the core tube, but also solve the problem that the internal temperature is difficult to uniformly reach the reaction temperature due to the heating of the outer wall of the core tube. By controlling the heating temperature through the radiation combustion mechanism 3 and driving the rotation of the core tube 2 through the driving mechanism 4, the uniform heating and sufficient mixing of the materials in the core tube can be realized, the control precision and consistency of the sintering process are improved, and the production of high-quality products is facilitated; the materials after sintering are discharged from the core tube 2 through the receiving mechanism 6.

[0044] The feeding mechanism 1 and the receiving mechanism 6 are connected with the furnace core pipe 2 through the sealing mechanism 5, the sealing mechanism 5 is arranged to effectively isolate the gas exchange between the furnace core pipe 2 and the feeding mechanism 1 and the receiving mechanism 6, reduce the invasion of external air or harmful gas, not only protect the sintering environment, but also reduce the heat loss, improve the energy utilization efficiency.

[0045] Preferably, the furnace core pipe 2 is made of phosphate refractory castable. The phosphate refractory castable can maintain high strength at high temperature, which is crucial for the furnace core pipe which needs to withstand high temperature environment. Good high temperature strength means that the furnace core pipe can maintain the stability and integrity of the structure under long time high temperature working; at the same time, the phosphate castable has good slag erosion resistance, which can effectively resist the erosion of molten slag in the furnace, prolong the service life of the furnace core pipe. This has important significance for improving the overall operation efficiency of the furnace and reducing the maintenance cost; further, the furnace core pipe may be subjected to various forms of wear during operation, and the phosphate castable can significantly reduce wear due to its excellent wear resistance, maintain the dimensional accuracy and surface finish of the furnace core pipe; finally, the phosphate castable is easy to form a dense structure during construction, thereby having good air tightness, which enables the furnace core pipe to more effectively control the atmosphere in the kiln, improve the thermal efficiency of the kiln and the product quality.

[0046] The combustion radiation heating rotary kiln of the present application heats the inside of the furnace core pipe 2 through the radiation combustion mechanism 3, improves the heating efficiency and reduces corrosion, drives the rotation of the furnace core pipe 2 through the driving mechanism 4 to improve the sintering quality, and enhances the sealing property through the sealing mechanism 5.

[0047] Further, the radiation combustion mechanism 3 comprises a combustion nozzle 31 and a radiation pipe 32, the combustion nozzle 31 is arranged on the side wall of the kiln, one end of the radiation pipe 32 is connected with the combustion nozzle 31, and the other end of the radiation pipe 32 is suspended in the interior of the kiln.

[0048] The combustion nozzle 31 comprises a fuel gas pipe 311, a combustion-supporting gas pipe 312 and an exhaust pipe 313, and the fuel gas pipe 311, the combustion-supporting gas pipe 312 and the exhaust pipe 313 are located outside the kiln.

[0049] By arranging the combustion nozzle 31 on the side wall of the kiln and connecting the radiation pipe 32 to be suspended in the interior of the kiln, the heat generated by combustion can be more effectively transferred to the materials in the furnace core pipe 2 by radiation. The suspended design of the radiation pipe 32 reduces the loss of heat in the transmission process, ensures that the heat can be directly and uniformly radiated to the materials, thereby improving the heating efficiency and the uniformity of the material sintering.

[0050] The combustion nozzle 31 integrates a gas pipe 311, an auxiliary gas pipe 312, and an exhaust pipe 313, which enables precise control of the mixing and combustion of gas and auxiliary gas, as well as timely exhaust of waste gas generated by combustion. This helps to optimize the combustion process, improve combustion efficiency, reduce the generation of harmful gases, and reduce environmental pollution.

[0051] By arranging the gas pipe 311, the auxiliary gas pipe 312, and the exhaust pipe 313 outside the kiln, the direct impact of high temperature and corrosive environment on these pipes can be avoided, reducing the risk of pipe leakage and damage. This not only improves the safety of the equipment, but also prolongs the service life of the pipes and enhances the reliability of the entire rotary kiln.

[0052] Specifically, after the combustion gas and auxiliary gas (air or oxygen) are introduced into the combustion nozzle 31 through the gas pipe 311 and the auxiliary gas pipe 312, ignition and combustion are carried out, and the flame is sprayed into the radiation pipe 32. The radiation pipe 32 radiates heat to the inside of the core pipe 2, raising the temperature of the core pipe 2 to heat and sinter the material. The present combustion radiation heating rotary kiln indirectly heats the material through the radiation pipe burner 3, and there is no gas contact with the material in the core pipe 2; and there is no gas to affect the atmosphere in the core pipe 2, avoiding disturbance to the atmosphere in the core pipe 2, ensuring the stability and safety of the atmosphere in the kiln.

[0053] Further, the radiation pipe 32 is a recrystallized silicon carbide pipe.

[0054] The recrystallized silicon carbide pipe has extremely high high-temperature resistance and can maintain stable physical and chemical properties in high-temperature environments, which is crucial for kilns that need to sinter under high-temperature conditions. At the same time, the recrystallized silicon carbide pipe also exhibits excellent corrosion resistance, effectively resisting the corrosion of corrosive materials such as fluorine-containing, sulfur-containing, and chlorine-containing materials and the corrosive gases generated by their heating, thereby prolonging the service life of the radiation pipe and reducing maintenance and replacement costs due to corrosion.

[0055] Further, the recrystallized silicon carbide pipe has good thermal conductivity, which can quickly transfer the heat generated by combustion to the material in the core pipe 2, improving the heating efficiency and sintering speed. In addition, the recrystallized silicon carbide pipe has excellent oxidation resistance and can maintain its structure and performance stability in high-temperature oxidative environments.

[0056] Further, the feeding mechanism 1 includes a support seat 14, a hopper 11, a feeder 12, and a feeding cover 13.

[0057] The feeding cover 13 is arranged at one end of the core pipe 2 through a sealing mechanism 5, and the feeding cover 13 is in communication with the hopper 11.

[0058] The bunker 11 and the feeder 12 are installed on the support base 14, and the power end of the feeder 12 is located inside the bunker 11, which is used to input materials into the feeding cover 13.

[0059] The feeder 12 enables materials to be accurately input into the feeding cover 13 at a predetermined rate and quantity, and then into the core tube 2 for sintering. This control method improves the efficiency and accuracy of feeding, helping to ensure the stability of the sintering process and the consistency of product quality. In addition, the feeder 12 enables materials to be smoothly and continuously input, reducing losses caused by material accumulation, blockage, or splashing, etc. This not only reduces production costs, but also helps to maintain a clean working environment.

[0060] The feeding cover 13 is connected to one end of the core tube 2 through the sealing mechanism 5, ensuring the sealing during the feeding process. This effectively prevents external air or harmful gases from entering the inside of the core tube, protecting the sintering environment and reducing heat loss.

[0061] Further, the receiving mechanism 6 includes a discharging cover 61, a receiving bucket 62, and a control assembly 63;

[0062] The discharging cover 61 is arranged at the other end of the core tube 2 through another sealing mechanism 5, the receiving bucket 62 is used to receive the materials discharged from the discharging cover 61, and the control assembly 63 is arranged between the discharging cover 61 and the receiving bucket 62, which is used to control the communication or closure between the discharging cover 61 and the receiving bucket 62.

[0063] By setting the control assembly 63 to control the communication or closure between the discharging cover 61 and the receiving bucket 62, the discharging time and speed of materials can be flexibly adjusted according to actual production needs. This control method improves the efficiency and flexibility of the receiving process, helping to maintain the continuity and stability of the production line.

[0064] The discharging cover 61 is connected to the other end of the core tube 2 through the sealing mechanism 5, ensuring the sealing during the receiving process. This effectively prevents external air or harmful gases from entering the inside of the core tube, protecting the sintering environment and reducing heat loss.

[0065] The receiving bucket 62 enables materials to be collected in an orderly and centralized manner, reducing losses caused by material scattering, splashing, etc. At the same time, the sealed receiving process also reduces the contact between materials and the external environment, reducing the risk of pollution.

[0066] By accurately controlling the discharging time and speed of materials, it can be ensured that the materials are discharged in time and completely after sintering, avoiding the problems of over-burning or pollution caused by long-term retention. This helps to improve the quality and consistency of the products.

[0067] Further, the feeding cover 13, the furnace core pipe 2 and the discharging cover 61 constitute the kiln;

[0068] The combustion nozzle 31 is installed on the discharging cover 61, and the radiation pipe 32 is arranged along the length direction of the furnace core pipe 2;

[0069] The outer wall of the furnace core pipe 2 is provided with the heat insulation cotton 21.

[0070] The feeding cover 13 and the discharging cover 61 are installed on both ends of the furnace core pipe 2 through the sealing mechanism 5, and constitute the kiln with good sealing property.

[0071] The combustion nozzle 31 is installed on the discharging cover 61, and the radiation pipe 32 is arranged along the length direction of the furnace core pipe 2;

[0072] The outer wall of the furnace core pipe 2 is provided with the heat insulation cotton 21.

[0073] Further, the combustion gas pipeline 312 and the exhaust gas pipeline 313 are communicated through the connecting pipe 314.

[0074] By communicating the combustion gas pipeline 312 and the exhaust gas pipeline 313 through the connecting pipe 314, the waste heat in the exhaust gas can be recycled. The exhaust gas still contains certain heat energy, and this part of heat energy can be absorbed by the combustion gas, thereby increasing the initial temperature of the combustion gas, reducing the heat energy required in the combustion process, and further improving the thermal efficiency of the whole system. Since the waste heat is recycled, the demand for new heat energy in the combustion process is reduced, so the energy consumption can be significantly reduced, and the production cost can be reduced.

[0075] Further, the discharging cover 61 is provided with the thermocouple 7, and the thermocouple 7 extends into the interior of the kiln.

[0076] By extending the thermocouple 7 into the interior of the kiln, the temperature condition in the interior of the kiln can be monitored in real time and accurately. The temperature data collected by the thermocouple 7 can be fed back to the control system in real time, which provides an important basis for system adjustment and control. This helps to maintain the stability and uniformity of the temperature in the interior of the kiln, thereby improving the product quality.

[0077] Further, based on the real-time temperature data provided by the thermocouple 7, the control system can more accurately adjust the combustion parameters, such as the size of the burner, the flow of combustion gas, etc., to ensure that the internal temperature of the kiln always remains within the optimal range. By precisely controlling the combustion process, unnecessary energy waste can be reduced, production costs can be lowered, and harmful emissions can be reduced, meeting the requirements of modern industrial production for energy saving and emission reduction.

[0078] Further, the sealing mechanism 5 comprises a sealing shell 51, a sealing assembly 52 and a fixed ring 53.

[0079] The sealing assembly 52 is arranged at the inner ring of the sealing shell 51, and the fixed ring 53 is fixedly connected with the kiln core pipe 2, and the fixed ring 53 is rotatably connected with the inner ring 511 of the sealing shell 51 through the sealing assembly 52.

[0080] The fixed ring 53 is fixedly connected with the kiln core pipe 2 and rotates with the kiln core pipe 2. Specifically, the sealing shell 51 is fixedly arranged, the inner ring 511 of the sealing shell 51 is provided with the sealing assembly 52, and the fixed ring 53 rotates in the inner ring 511 through the sealing assembly 52. The sealing assembly 52 improves the tightness and durability between the feeding mechanism 1 and / or the material receiving mechanism 6 and the kiln core pipe 2, while ensuring smooth rotation of the kiln core pipe 2. This not only helps to reduce gas and material leakage, improve the energy efficiency of the kiln and product quality, but also reduces maintenance costs and workload, bringing significant economic and social benefits to the production and operation of enterprises.

[0081] Further, the fixed ring 53 and the kiln core pipe 2 have a heat insulation cavity 531 therebetween.

[0082] The sealing assembly 52 comprises two groups of packing ropes 521, and an isolation cavity 522 is formed between the two groups of packing ropes 521. The sealing shell 51 is provided with an oil filling hole 512, and the oil filling hole 512 communicates with the isolation cavity 522.

[0083] The fixed ring 53 and the kiln core pipe 2 have a heat insulation cavity 531 therebetween, which can effectively reduce the heat transferred from the kiln core pipe 2 to the fixed ring 53, thereby reducing the heat loss of the external structure of the rotary kiln and improving the overall heat insulation performance. Preferably, a heat insulation layer is arranged in the heat insulation cavity 531, which is tightly attached to the outer wall of the kiln core pipe 2, and can further improve the heat insulation effect. The heat insulation cavity 531 can reduce the thermal stress on the fixed ring and adjacent components caused by high temperature, reduce the risk of damage caused by high temperature aging and thermal fatigue of the materials, thereby prolonging the service life of the equipment.

[0084] The sealing assembly 52 is composed of two groups of packing sealing ropes 521 and the isolation chambers 522 between the two groups of packing sealing ropes 521; the sealing assembly 52 forms an additional sealing barrier and can effectively prevent gas or material from leaking from the sealing position, thereby improving the sealing performance of the rotary kiln. Preferably, the packing sealing ropes 521 are made of graphite or / and ceramic materials. Graphite has good high-temperature resistance and corrosion resistance, can maintain stable physical and chemical properties in a high-temperature environment, and can resist the corrosion of various corrosive media such as acid, alkali and salt, which makes the graphite packing sealing rope have excellent sealing performance and can effectively prevent medium leakage. Ceramic also has very high high-temperature resistance and corrosion resistance, can maintain stable performance in a high-temperature and harsh chemical environment; and the ceramic material has good insulation and heat insulation performance and can maintain a low heat transfer efficiency at high temperatures. This makes the ceramic packing sealing rope perform well in the working condition requiring heat insulation.

[0085] The oil filling hole 512 is in communication with the isolation chamber 522, and the heat exchange of the sealing shell 51 and the packing sealing rope 521 can be performed by air exchange of the isolation chamber 522, thereby avoiding damage to the sealing mechanism 5 caused by high temperature.

[0086] The technical principles of the present application are described above in combination with specific embodiments. These descriptions are only for the purpose of explaining the principles of the present application and cannot be interpreted in any way as a limitation on the scope of protection of the present application. Based on the explanations herein, those skilled in the art can conceive other specific embodiments of the present application without creative labor, and these embodiments will fall within the scope of protection of the present application.

Claims

1. A combustion radiation heated rotary kiln characterized by: The device comprises a feeding mechanism, a core pipe, a radiation combustion mechanism, a driving mechanism, a sealing mechanism and a receiving mechanism. The feeding mechanism is arranged at one end of the core pipe and used for feeding materials into the core pipe. The sealing mechanism is arranged at the connection between the core pipe and the feeding mechanism and the receiving mechanism. The sealing mechanism comprises a sealing shell, a sealing assembly and a fixed ring. The sealing assembly is arranged at the inner ring of the sealing shell. The fixed ring is fixedly connected with the core pipe and rotatably connected with the sealing shell through the sealing assembly. The fixed ring and the core pipe have a heat insulation cavity. The sealing assembly comprises two groups of packing sealing ropes.

2. A direct-fired rotary kiln according to claim 1 wherein: The sealing shell is provided with an oil filling hole which is communicated with the isolation cavity.

3. A direct-fired rotary kiln according to claim 2, wherein: The feeding mechanism comprises a supporting seat, a material bin, a feeding machine and a feeding cover.

4. A direct-fired rotary kiln according to claim 3, wherein: The feeding cover is arranged at one end of the core pipe through one sealing mechanism. The feeding cover is communicated with the material bin. The material bin and the feeding machine are installed on the supporting seat. The power end of the feeding machine is located in the interior of the material bin. The feeding machine is used for feeding materials into the feeding cover. The receiving mechanism comprises a discharging cover, a receiving barrel and a control assembly. The discharging cover is arranged at the other end of the core pipe through another sealing mechanism. The receiving barrel is used for receiving materials discharged from the discharging cover. The control assembly is arranged between the discharging cover and the receiving barrel and used for controlling the communication or closure between the discharging cover and the receiving barrel. The radiation combustion mechanism heats the materials in the interior of the core pipe through heat radiation. The radiation combustion mechanism comprises a combustion nozzle and a radiation pipe. The combustion nozzle is arranged on the sidewall of a kiln. One end of the radiation pipe is connected with the combustion nozzle. The other end of the radiation pipe is suspended in the interior of the kiln. The combustion nozzle comprises a gas pipeline, an auxiliary gas pipeline and an exhaust pipeline. The gas pipeline, the auxiliary gas pipeline and the exhaust pipeline are located outside the kiln. The feeding cover, the core pipe and the discharging cover constitute the kiln. The combustion nozzle is installed on the discharging cover. The radiation pipe extends along the length direction of the core pipe. The outer sidewall of the core pipe is provided with heat insulation cotton. The driving mechanism is used for driving the core pipe to rotate. The radiation pipe is a recrystallized silicon carbide pipe. The auxiliary gas pipeline and the exhaust pipeline are communicated through a connecting pipe. A thermocouple is arranged on the discharging cover and extends into the interior of the kiln.

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