Continuous rotary kiln, sintering device and sintering method

Abstract

The invention discloses a continuous rotary kiln which comprises a rotary kiln furnace tube, and the rotary kiln furnace tube comprises a kiln head feeding section; the middle reaction section is used for carrying out sintering reaction on the to-be-sintered material and the metal steam and obtaining a sintered product after sintering is completed, and one end of the middle reaction section is connected with the kiln head feeding section; the kiln tail discharging section is used for backwards conveying the sintered product after sintering and discharging the sintered product out of the rotary kiln furnace tube, and the other end of the middle reaction section is connected with the kiln tail discharging section; the continuous rotary kiln further comprises a metal steam inlet mechanism used for introducing metal steam into the middle reaction section, and the metal steam inlet mechanism is arranged in the rotary kiln tube and extends to the middle reaction section from the kiln head feeding section. The input end of the metal steam inlet mechanism is provided with an evaporation furnace connector used for being communicated with an evaporation furnace for preparing metal steam. The invention further discloses a sintering device and a sintering method. According to the invention, continuous feeding can be realized without stopping the furnace, and the metal coating sintering effect of the battery negative electrode material is good.

Description

Technical Field

[0001] The present invention relates to the technical field of sintering and coating of battery materials, and in particular to a continuous rotary kiln, a sintering device and a sintering method. Background Art

[0002] At present, in the processing of many devices or materials such as batteries or semiconductors, the raw materials need to be sintered under high temperature conditions. For example, the coating process of battery negative electrode materials requires sintering of the materials. The sintering process requires the battery materials to be protected by protective gas. When coating new battery negative electrode materials, high-concentration controllable metal vapor needs to be introduced for coating.

[0003] Traditional sintering furnaces, such as rotary kilns, are intermittent production furnaces, which generally have only one heating reaction zone. Metal materials and battery negative electrode materials are placed in the heating reaction zone for sintering at the same time. In this way, the battery negative electrode material cannot fully contact with the metal vapor. At the same time, the quality of the metal vapor in the heating reaction zone, such as the concentration, continuity and uniformity of the metal vapor, is difficult to guarantee. Therefore, the sintered metal coating effect is poor, and there are problems such as the battery negative electrode material indicators after sintering are difficult to meet the requirements. In addition, intermittent sintering production needs to stop the furnace and refill after each production. Frequent shutdowns for disassembly and refilling are not only labor-intensive, but also have low production efficiency. Therefore, this method is only suitable for sample preparation under experimental conditions. Since the process stability is difficult to guarantee, it cannot be adapted to large-scale industrial production. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a continuous rotary kiln, a sintering device and a sintering method that can realize continuous feeding without stopping the furnace and have good metal coating sintering effect of battery negative electrode materials.

[0005] In order to solve the above technical problems, the technical solution proposed by the present invention is: A continuous rotary kiln, comprising a rotary kiln tube, wherein the rotary kiln tube comprises: The kiln head feeding section is used to feed the material to be sintered into the rotary kiln tube and transport it backward; An intermediate reaction section is used for the sintering reaction between the material to be sintered and the metal vapor to obtain a sintered product after sintering. One end of the intermediate reaction section is connected to the kiln head feeding section; The kiln tail discharge section is used to transport the sintered products backward and discharge them from the rotary kiln tube. The other end of the intermediate reaction section is connected to the kiln tail discharge section. The continuous rotary kiln also includes a metal vapor intake mechanism for introducing metal vapor into the intermediate reaction section. The metal vapor intake mechanism is arranged in the rotary kiln furnace tube and extends from the kiln head feeding section to the intermediate reaction section. The input end of the metal vapor intake mechanism is provided with an evaporation furnace interface for communicating with an evaporation furnace for preparing metal vapor.

[0006] The continuous rotary kiln of the present invention can be used for the continuous production of battery negative electrode material transportation and metal coating. The material to be sintered (battery negative electrode material) continuously enters the continuous rotary kiln from the kiln head feeding section and is then continuously transported from front to back. After entering the intermediate reaction section, the material to be sintered is fully contacted and reacted with the metal vapor introduced by the metal vapor intake mechanism during the continuous transportation process, gradually completing the metal coating sintering at high temperature. After sintering, the sintered product continues to be continuously transported backward and is finally discharged through the kiln tail discharge section, thereby realizing continuous metal coating sintering production. The kiln head feeding section can continuously add the material to be sintered, and the metal vapor intake mechanism can be connected to the evaporation furnace for preparing metal vapor to continuously provide high-quality metal vapor. With this cooperation, continuous filling can be achieved without stopping the rotary kiln, and the metal coating sintering effect of the battery negative electrode material is good. Automatic loading and unloading are carried out according to process requirements, ensuring the consistency of product quality and indicators of multiple continuous furnaces, and meeting the needs of industrialized large-scale production of new battery negative electrode materials.

[0007] In the above-mentioned continuous rotary kiln, preferably, the metal vapor air intake mechanism includes a heating section and an exhaust section, the heating section is arranged in the kiln head feed section, the exhaust section is arranged in the intermediate reaction section, the heating section includes a heating section pipeline and a heating section heater for heating the metal vapor in the heating section pipeline, the heating section heater is arranged on the periphery of the heating section pipeline, the exhaust section includes an exhaust section pipeline, the exhaust section pipeline is connected to the heating section pipeline, and the exhaust section pipeline is provided with a plurality of exhaust holes for introducing metal vapor into the intermediate reaction section. In order to ensure the quality of the provided metal vapor, the metal vapor air intake mechanism is divided into a heating section and an exhaust section, the heating section corresponds to the area of ​​the kiln head feed section, and the exhaust section corresponds to the area of ​​the intermediate reaction section. The heating section heater can heat the heating section pipeline to ensure that the metal vapor will not condense or partially condense during the transportation process. Even if the evaporator produces high-quality, uniform metal vapor during operation, poor metal cladding sintering results may still occur in the rotary kiln due to issues with the quality of the metal vapor, such as uniformity and stability. Research has found that this is due to condensation and consumption of the metal vapor during transportation. This condensation not only affects the concentration and uniformity of the metal vapor, but also condenses and remains in the pipeline, affecting the stability of subsequent metal vapor transportation. This prevents the high-quality metal vapor from being stably and uniformly transported to the intermediate reaction section, seriously affecting the sintering quality and effect of the final metal-clad sintered product. Through the above structure, the high-quality metal vapor from the evaporator is transported through the heating section pipeline to the exhaust section pipeline, and then discharged from the exhaust port to sinter and react with the material to be sintered.

[0008] In the continuous rotary kiln described above, the exhaust holes are preferably arranged toward the material accumulation direction within the intermediate reaction zone, and the apertures of the exhaust holes gradually increase in diameter as they move away from the heating zone. This arrangement ensures a substantially uniform metal vapor flow rate at each exhaust hole, preventing the sintered material from overreacting at the kiln head and remaining unreacted at the kiln tail, thereby achieving continuous and uniform sintering, further improving the metal-clad sintering effect and the quality of the final sintered product.

[0009] In the above-mentioned continuous rotary kiln, preferably, the metal vapor air intake mechanism further includes an air intake mechanism support for supporting the heating section and the exhaust section, the air intake mechanism support including an air intake mechanism support frame, an air intake mechanism connecting plate and a rotating connecting ring, the air intake mechanism support frame is fixedly arranged in the rotary kiln furnace tube, the air intake mechanism connecting plate is fixedly arranged on the air intake mechanism support frame, the rotating connecting ring is rotatably arranged on the heating section pipeline and the exhaust section pipeline, and the rotating connecting ring is fixedly connected to the air intake mechanism connecting plate. The heating section pipeline and the exhaust section pipeline are arranged on the rotating connecting ring. During operation, the air intake mechanism support frame rotates with the rotary kiln furnace tube, driving the air intake mechanism connecting plate and the rotating connecting ring to rotate around the heating section pipeline and the exhaust section pipeline, while the heating section pipeline and the exhaust section pipeline remain stationary, thereby achieving support for the heating section pipeline and the exhaust section pipeline. The air intake mechanism support is rotatably and flexibly connected to the heating section pipeline or the exhaust section pipeline, which can release the thermal expansion of the pipeline while ensuring effective support for the heating section and the exhaust section, preventing the pipeline from being damaged due to deformation during the heating process, and ensuring that the heating section and the exhaust section operate stably and reliably in the rotary kiln furnace tube.

[0010] In the above-mentioned continuous rotary kiln, preferably, the kiln head feeding section is connected to a feeding mechanism, which includes a main silo, a feeder, and a buffer silo. The output end of the main silo is connected to the input end of the feeder, the output end of the feeder is connected to the input end of the buffer silo, and the output end of the buffer silo is connected to the kiln head feeding section. The feeding mechanism enables the material to be sintered to be continuously fed into the rotary kiln tube without stopping the kiln, thereby achieving continuous metal coating sintering, ensuring the sintering effect while improving production efficiency.

[0011] In the above-mentioned continuous rotary kiln, preferably, a plurality of stir-frying plates for turning and lifting the material are provided on the inner wall of the intermediate reaction section, one end of the stir-frying plate is fixedly connected to the rotary kiln furnace tube, and the other end is bent toward the rotation direction of the rotary kiln furnace tube. The stir-frying plate is provided with a vibration mechanism for vibrating and dispersing the material on the stir-frying plate, and the vibration mechanism includes a vibration rod and a vibration head. The vibration head is slidably provided on the vibration rod, one end of the vibration rod is fixed to the stir-frying plate, and the other end is provided with a limiting portion for limiting the vibration head to prevent it from falling off. The stir-frying plates are evenly staggered and can quickly turn the material to achieve dynamic sintering. The stir-frying plates are provided with bends, which can scoop the material to a high place and then let it fall freely. The material is in a dispersed state during the falling process, which can increase the contact area between the material and the metal vapor, thereby improving the metal coating effect. The vibrating mechanism vibrates and disperses the material on the stir-fry plate. During operation, the entire vibrating mechanism rotates with the rotary kiln tube, and the vibrating head slides on both ends of the vibrating rod under the action of gravity. When the vibrating mechanism rotates to the top, the vibrating head slides down from the connecting end of the vibrating rod to the limit portion. When the vibrating mechanism rotates to the bottom, the vibrating head slides down from the limit portion to the connecting end of the vibrating rod. When the vibrating head slides to the connecting end, it strikes the vibrating stir-fry plate, preventing the material from clumping and sticking to the wall, while also facilitating the forward movement of the material. More importantly, the vibrating mechanism automatically strikes the stir-fry plate as the rotary kiln tube rotates, dispersing the material on the stir-fry plate and vibrating it upward. The vibrated and scattered material contacts and collides with the falling dispersed material, changing its direction of movement and increasing its hovering time. This allows the metal vapor to better contact and react with the material, further improving the metal coating effect.

[0012] In the aforementioned continuous rotary kiln, preferably, the inner walls of the kiln head feed section and the kiln tail discharge section are provided with spiral plates for conveying material backward. Multiple guide plates are provided between the stir-fry plate and the spiral plates. These guide plates are curved plates that spiral along the inner wall of the rotary kiln tube. The spiral plates facilitate the forward conveyance of material within the rotary kiln tube, ensuring uniform material transport. The guide plates serve as a transition between the stir-fry plate and the spiral plates, propelling the material forward while also lifting it, thereby facilitating its contact and reaction with the metal vapor.

[0013] In the above-mentioned continuous rotary kiln, preferably, the ends of the kiln head feeding section and the kiln tail discharging section are provided with a sealing structure, the sealing structure includes an end baffle plate and an end head cover, the end head cover includes an inner plate, an outer plate and an end panel, the outer plate is arranged on one side of the outer edge of the end panel, the inner plate is arranged on the same side of the end panel, and the inner plate is located inside the outer plate b53, the end baffle plate is arranged at the end of the rotary kiln furnace tube, and one end thereof is sealed to the inner plate by a first sealing member, and the other end is sealed to the outer plate by a second sealing member, the end baffle plate, the inner plate, the outer plate and the end panel are enclosed to form an independent cavity, the independent cavity is filled with protective gas, and the pressure of the protective gas in the independent cavity is greater than the gas pressure in the rotary kiln furnace tube. The end baffle plate and the first sealing member can prevent material from entering the end head cover. The sealing structure ensures the sealing effect of the ends of the kiln head feeding section and the kiln tail discharging section through three seals to prevent leakage of material and atmosphere. The primary seal forms a radial seal with the rotary kiln tube through the end material baffle plate and the first seal, which can effectively prevent material leakage; the secondary seal forms an end face seal with the end cover through the second seal, which can effectively prevent the internal atmosphere from leaking out; the tertiary seal can further prevent the leakage of material and atmosphere by introducing a protective gas with a pressure slightly greater than the air pressure inside the rotary kiln tube into the independent cavity.

[0014] As a general technical concept, the present invention also provides a sintering device, including an evaporation furnace for preparing metal vapor and the above-mentioned continuous rotary kiln, wherein the metal vapor output end of the evaporation furnace is connected to the evaporation furnace interface of the continuous rotary kiln.

[0015] In the above-mentioned sintering device, preferably, the evaporation furnace includes a furnace body, and the furnace body includes: An air inlet section, used to provide protective gas; The metal melting section is used to melt the solid metal and form liquid metal; a metal evaporation section, configured to evaporate the metal liquid to form metal vapor; the metal melting section is connected to the metal evaporation section, and a metal liquid flow channel is provided between the metal melting section and the metal evaporation section for allowing the metal liquid to flow from the metal melting section to the metal evaporation section; and an output end of the air inlet section is connected to the metal evaporation section; The furnace entry section is used to send the metal vapor into the continuous rotary kiln, and the input end of the furnace entry section is connected to the metal evaporation section.

[0016] The evaporation furnace for preparing metal vapor of the present invention is provided with an air intake section, a metal melting section, a metal evaporation section, and a furnace entry section. The air intake section can introduce a protective gas into the furnace body, replace the air in the furnace body and the pipeline, and realize metal evaporation under the protective gas atmosphere; the metal melting section can realize heating the solid metal raw material to the melting point temperature to achieve metal melting, and then send the metal liquid to the metal evaporation section; the metal evaporation section heats the metal liquid from the metal melting section to the metal evaporation temperature to form metal vapor. The metal vapor is transported to the furnace entry section under the action of the gas blown out by the air intake section. The furnace entry section is connected to a continuous rotary kiln and can further transport the metal vapor to the continuous rotary kiln for metal coating and sintering of battery negative electrode materials. The evaporation furnace of the present invention performs metal melting and metal evaporation in different zones. After the metal is melted, it enters the metal evaporation section for evaporation. Compared with the process from solid to gas, the process from liquid to gas takes less time and provides a more uniform metal vapor content, which can ensure the stable output of metal vapor, facilitate the subsequent metal coating and sintering of battery negative electrode materials, and improve the sintering quality. In addition, the metal melting section only melts solid metal and does not form a large amount of metal vapor. After the metal evaporation section filled with metal vapor is separated by the metal melting section, solid metal raw materials can be added to the metal melting section to achieve non-stop furnace charging, avoiding multiple disassembly and assembly that affects the service life of the equipment.

[0017] In the aforementioned sintering device, preferably, a metal liquid flow tube is provided within the metal liquid flow channel, and a flow channel heater is also provided on the metal liquid flow channel for regulating the temperature within the metal liquid flow tube. The metal liquid flow tube can be used to control the flow rate of the metal liquid, thereby controlling the evaporation rate of the metal and the vapor production, further improving the stability and controllability of the metal vapor supply, meeting the metal vapor demand of the battery negative electrode material in the continuous rotary kiln, and improving the quality of metal coating sintering. The flow channel heater can regulate the temperature within the metal liquid flow tube, avoiding slow flow or even solidification blockage of the metal liquid due to a decrease in temperature within the metal liquid flow tube, and can better control the flow rate of the metal liquid flowing into the metal evaporation section.

[0018] In the above-mentioned sintering device, preferably, the metal liquid circulation channel and the metal liquid guide tube are both arranged in the vertical direction, the metal melting section is arranged above the metal evaporation section, and the air intake section is arranged below the metal evaporation section, one side of the metal evaporation section is connected to the output end of the air intake section, and the other side is connected to the input end of the furnace entry section. The metal melting section is arranged above the metal evaporation section, and the metal liquid flow channel and the metal liquid guide pipe are arranged vertically. The metal liquid can flow from the metal liquid guide pipe into the metal evaporation section under the action of gravity, and the flow rate of the metal liquid can be controlled by controlling the size and temperature of the metal liquid guide pipe; one side of the metal evaporation section is connected to the air intake section, and the other side is connected to the furnace entry section. The gas discharged from the air intake section can send the metal vapor in the metal evaporation section to the furnace entry section, thereby forming a hot air flow from one side to the other side of the metal evaporation section. Since the metal liquid drips from the top of the metal evaporation section, the part that contacts with the hot air flow during its falling process evaporates into metal vapor. Through the action of the falling metal droplets and the hot air flow, it begins to evaporate into metal vapor during its falling process, thereby increasing the evaporation area and improving the evaporation efficiency.

[0019] In the above-mentioned sintering device, preferably, the metal evaporation section includes an evaporation section furnace tube, an evaporation crucible is provided in the evaporation section furnace tube, an air inlet is provided on one side of the evaporation crucible, which is connected to the output end of the air inlet section, and an exhaust is provided on the other side, which is connected to the input section of the furnace section. The top of the evaporation crucible is provided with a liquid inlet connected to the metal liquid circulation channel. The metal evaporation section also includes an evaporation section heater and an evaporation section thermocouple for obtaining temperature information within the evaporation section furnace tube. The air inlet and exhaust are positioned so that a hot air flow is formed from one side to the other within the evaporation crucible. The liquid inlet is positioned so that the metal liquid forms a downward path from top to bottom within the evaporation crucible, thereby cooperating with the hot air flow. The evaporation section heater and the evaporation section thermocouple can maintain the temperature within the evaporation section furnace tube at a preset value, thereby providing sufficient heat to evaporate the metal liquid to form metal vapor.

[0020] In the above-mentioned sintering device, preferably, the metal melting section includes a melting section furnace tube, a melting crucible is provided in the melting section furnace tube, a drain port is provided at the bottom of the melting crucible, and the metal melting section also includes a melting section heater and a melting section thermocouple for obtaining temperature information within the melting section furnace tube. The metal melting section is also provided with a metal feeding mechanism for adding solid metal raw material to the melting crucible, and the metal feeding mechanism is connected to the melting crucible. The metal melting section is provided with a metal feeding port, and the metal feeding mechanism is connected to the metal feeding port. The metal feeding mechanism and the metal melting section are both provided with a ventilation inlet and a ventilation exhaust port for replacing the internal gas, and the ventilation inlet and ventilation exhaust port can be used to adjust the internal atmosphere. Solid metal raw material is melted into a liquid state within the crucible and flows out through the drain port. The melting section heater and thermocouple maintain the temperature within the furnace tube at a preset value, allowing the metal in the crucible to melt into a liquid state. The metal feeding mechanism, combined with the melting section, allows for continuous feeding. When feeding is required, the solid metal raw material is simply fed into the melting section through the metal feeding mechanism, eliminating the need for frequent furnace shutdowns and assembly, enabling continuous sintering and improving the efficiency of large-scale production. This evaporation furnace can be installed once for multiple sintering cycles, saving time and reducing the impact of repeated assembly and disassembly that would otherwise affect the equipment's lifespan.

[0021] In the aforementioned sintering apparatus, preferably, the air inlet section includes an air inlet pipe, the input end of which is provided with an air inlet connector for connecting to an air source. The air inlet pipe comprises multiple pipe layers, each of which includes multiple branch pipes and a main pipe for connecting adjacent pipe layers. An air inlet section heater is provided between adjacent pipe layers for preheating the shielding gas within the air inlet pipe. The air inlet section is also provided with an air inlet section thermocouple for obtaining temperature information within the air inlet section. The shielding gas is contained within the air inlet section and is located below the evaporation furnace, with the gas flowing from bottom to top. The multiple pipe layers and the air inlet section heater preheat the shielding gas. A special piping design maximizes the length of the preheating pipe, thereby ensuring both preheating time and effectiveness, ensuring that the gas entering the metal evaporation section reaches the required preheating temperature. Furthermore, the shielding gas in the air inlet section forms a hot air flow from one side of the metal evaporation section to the other, accelerating the evaporation of the liquid metal during the dripping process and transporting the metal vapor to the inlet section, and then from there to the continuous rotary kiln.

[0022] In the aforementioned sintering apparatus, the furnace entry section preferably includes a furnace entry pipe for conveying metal vapor from the evaporation furnace to the continuous rotary kiln. One end of the furnace entry pipe communicates with the metal evaporation section, and the other end communicates with the interior of the continuous rotary kiln. The furnace entry section also includes a furnace entry heater and a furnace entry thermocouple for obtaining temperature information within the furnace entry section. The furnace entry heater and furnace entry thermocouple heat the metal vapor within the furnace entry section, thereby conveying the metal vapor to the continuous rotary kiln at a higher temperature for sintering with the battery negative electrode material, thereby improving the quality of the metal coating sintering.

[0023] In the aforementioned sintering device, the evaporation furnace preferably further comprises a support bracket, a guide rail, and multiple rollers. The guide rail is disposed at the bottom of the evaporation furnace, the furnace body is mounted on the support bracket, and the rollers are mounted at the bottom of the support bracket and are movably mounted on the guide rail. The support bracket is also provided with a load cell. The support bracket supports the furnace body, and the multiple rollers and guide rails enable the evaporation furnace to move along the rails, facilitating docking or assembly of the evaporation furnace with the continuous rotary kiln. The load cell on the support bracket monitors metal vapor consumption in real time.

[0024] As a general technical concept, the present invention also provides a sintering method, which uses the above-mentioned sintering device for sintering, comprising the following steps: S1, feeding the material to be sintered into the rotary kiln tube from the kiln head feeding section; S2, an evaporation furnace prepares metal vapor and transports the prepared metal vapor to a continuous rotary kiln; S3, continuously transporting the material to be sintered from the kiln head to the kiln tail, and performing a sintering reaction with the metal vapor introduced by the metal vapor inlet mechanism when the material to be sintered passes through the intermediate reaction section; S4. After sintering, the sintered products are continuously transported to the kiln tail discharge section, and then discharged from the continuous rotary kiln through the kiln tail discharge section, thus realizing continuous sintering production.

[0025] According to the sintering method of the present invention, the material to be sintered can be continuously fed into the continuous rotary kiln from the kiln head feeding section, and the metal vapor prepared by the evaporation furnace can be continuously fed into the continuous rotary kiln from the metal vapor air intake mechanism. After entering the intermediate reaction section, the material to be sintered is continuously conveyed and fully contacts and reacts with the metal vapor introduced by the metal vapor air intake mechanism, and metal coating sintering is gradually completed at high temperature. After the sintering is completed, the sintered product continues to be continuously conveyed backward and is finally discharged through the kiln tail discharge section, thereby realizing continuous metal coating sintering production. The method is suitable for large-scale production of metal-coated battery negative electrode materials.

[0026] Compared with the prior art, the advantages of the present invention are: The continuous rotary kiln of the present invention can be used for the continuous production of battery negative electrode material transportation and metal coating. The material to be sintered (battery negative electrode material) continuously enters the continuous rotary kiln from the kiln head feeding section and is then continuously transported from front to back. After entering the intermediate reaction section, the material to be sintered is fully contacted and reacted with the metal vapor introduced by the metal vapor intake mechanism during the continuous transportation process, and the metal coating sintering is gradually completed at high temperature. After the sintering is completed, the sintered product continues to be continuously transported backward and is finally discharged through the kiln tail discharge section, thereby realizing continuous metal coating sintering production.

[0027] The sintering device of the present invention combines a continuous rotary kiln and an evaporation furnace. The kiln head feeding section can continuously add the material to be sintered, and the high-quality metal vapor prepared by the evaporation furnace is continuously fed into the continuous rotary kiln through the metal vapor air intake mechanism, thereby realizing continuous filling of the rotary kiln without stopping the kiln, and performing a metal coating sintering reaction between the material to be sintered and the metal vapor, and the metal coating sintering effect of the battery negative electrode material is good.

[0028] The sintering method of the present invention can automatically load and unload materials according to process requirements, continuously metal-coated and sintered the material to be sintered and the metal vapor, ensuring the consistency of quality and indicators of products in multiple continuous furnaces, and meeting the needs of large-scale production of industrial new battery negative electrode materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of the sintering device of the embodiment.

[0030] Figure 2 It is a cross-sectional view of a continuous rotary kiln according to an embodiment.

[0031] Figure 3 4 is a cross-sectional view of the heating section of the metal vapor inlet mechanism in the embodiment.

[0032] Figure 4 1 is a cross-sectional view of the exhaust section of the metal vapor intake mechanism in the embodiment.

[0033] Figure 5 3D schematic diagram of the three-dimensional structure of the air intake mechanism support member of the metal vapor air intake mechanism in the embodiment.

[0034] Figure 6 Schematic diagram of the structure of the feeding mechanism in the embodiment.

[0035] Figure 7 yes Figure 2 A partial enlarged view of middle A.

[0036] Figure 8 Schematic diagram of the layout structure of the stir-fry plate in the embodiment.

[0037] Figure 9Schematic diagram of the sealing structure in the embodiment.

[0038] Figure 10 is a cross-sectional view of an evaporation furnace in the embodiment.

[0039] Legend: a. Evaporation furnace; a1. Air inlet section; a11. Air inlet pipe; a12. Air inlet section heating element; a14. Air inlet connector; a2. Metal melting section; a21. Melting section furnace tube; a22. Melting crucible; a23. Melting section heating element; a25. Flow channel heating element; a26. Metal liquid flow guide tube; a27. Metal feeding mechanism; a3. Metal evaporation section; a31. Evaporation section furnace tube; a32. Evaporation crucible; a33. Evaporation section heating element; a4. Furnace inlet section; a41. Furnace inlet pipe; a42. Furnace inlet section heating element; a5. Support bracket; a6. Guide rail; a7. Roller; b. Continuous rotary kiln; b1. Feeding section at kiln head; b2. Intermediate reaction section; b21. Stir-frying plate; b22. Vibrating rod; b23. Vibrating head; b24. Guide plate; b3. Discharging section at kiln tail; b4. Metal vapor air inlet mechanism; b41. Heating section pipeline; b42. Heating section heating element; b43. Exhaust section pipeline; b44. Exhaust hole; b45. Air inlet mechanism support frame; b46. Air inlet mechanism connecting plate; b47. Rotating connecting ring; b5. Sealing structure; b51. End baffle plate; b52. Inner plate; b53. Outer plate; b54. End panel; b55. First sealing element; b56. Second sealing element; b57. Independent cavity; b6. Feeding mechanism; b61. Main silo; b62. Feeder; b63. ​​Buffer silo. DETAILED DESCRIPTION

[0040] To facilitate understanding of the present invention, the present invention will be described in more comprehensive and detailed form below in conjunction with the accompanying drawings and preferred embodiments. However, the protection scope of the present invention is not limited to the following specific embodiments.

[0041] like Figure 1 As shown, the sintering device of this embodiment includes an evaporation furnace a for preparing metal vapor and a continuous rotary kiln b. The metal vapor output end of the evaporation furnace a is connected to the evaporation furnace interface of the continuous rotary kiln b.

[0042] like Figure 2 As shown, the continuous rotary kiln b of this embodiment includes a rotary kiln tube, and the rotary kiln tube includes: The kiln head feeding section b1 is used to feed the material to be sintered into the rotary kiln tube and transport it backward; The intermediate reaction section b2 is used for the sintering reaction between the material to be sintered and the metal vapor to obtain the sintered product after the sintering is completed. One end of the intermediate reaction section b2 is connected to the kiln head feeding section b1; The kiln tail discharge section b3 is used to transport the sintered products backward and discharge them from the rotary kiln tube. The other end of the intermediate reaction section b2 is connected to the kiln tail discharge section b3; The continuous rotary kiln also includes a metal vapor inlet mechanism b4 for introducing metal vapor into the intermediate reaction section b2. The metal vapor inlet mechanism b4 is disposed within the rotary kiln tube and extends from the kiln head feed section b1 to the intermediate reaction section b2. The input end of the metal vapor inlet mechanism b4 is provided with an evaporation furnace interface for communicating with the evaporation furnace a for preparing metal vapor. Specifically, the continuous rotary kiln of this embodiment can achieve a maximum operating temperature of 1200°C. The rotary kiln tube is divided into three sections: the kiln head feed section b1, the intermediate reaction section b2, and the kiln tail discharge section b3. The intermediate reaction section b2 is equipped with a reaction section heater to provide a high-temperature environment for sintering. The kiln head feed section b1, the intermediate reaction section b2, and the kiln tail discharge section b3 are connected by flanges, making them easy to disassemble and replace. The metal vapor inlet mechanism b4 penetrates from the kiln head end of the rotary kiln tube and extends all the way to the intermediate reaction section b2. The evaporation furnace interface can be connected to the furnace inlet pipe a41 in the evaporation furnace a, thereby sending the high-quality metal vapor prepared in the evaporation furnace a into the continuous rotary kiln b.

[0043] like Figure 3 and Figure 4 As shown, in this embodiment, the metal vapor inlet mechanism b4 includes a heating section and an exhaust section. The heating section is located within the kiln head feed section b1, and the exhaust section is located within the intermediate reaction section b2. The heating section includes a heating section pipeline b41 and a heating section heater b42 for heating the metal vapor within the heating section pipeline b41. The heating section heater b42 is located on the periphery of the heating section pipeline b41. The exhaust section includes an exhaust section pipeline b43, which is connected to the heating section pipeline b41 and is provided with multiple exhaust holes b44 for introducing metal vapor into the intermediate reaction section b2. Specifically, the heating section pipeline b41 is made of 310S metal, and the exhaust section pipeline b43 is made of high-temperature non-metallic material. It runs through the intermediate reaction section b2 area, and the exhaust section pipeline b43 is evenly distributed with exhaust holes b44 along the axial direction. The heating section pipeline b41 and the exhaust section pipeline b43 are connected by flanges. The heating section heating element b42 specifically includes refractory materials, resistance wires and temperature-control thermocouples. The resistance wires are arranged in the refractory materials and are made of 0Gr27Al7Mo2. Four resistance wires are connected in series to form a ring and are evenly distributed around the heating section pipeline b41. According to the length of the heating section pipeline b41, it is divided into three independent sections. Each section is arranged with a temperature-control thermocouple and can be independently temperature-controlled. Each section is connected by flanges.

[0044] In this embodiment, exhaust holes b44 are positioned toward the material accumulation within the intermediate reaction section b2, and their diameter gradually increases as they move away from the heating section. Specifically, the diameter of exhaust holes b44 increases gradually from the kiln head to the kiln tail, depending on the airflow velocity. Three holes are evenly spaced within an 80° to 120° radius toward the material accumulation. The exhaust section pipe b43 can be configured with different diameters, ranging from DN32 to DN65, depending on the metal vapor flow rate required by the sintering material.

[0045] like Figure 5 As shown, in this embodiment, the metal vapor air intake mechanism b4 also includes an air intake mechanism support for supporting the heating section and the exhaust section, and the air intake mechanism support includes an air intake mechanism support frame b45, an air intake mechanism connecting plate b46 and a rotating connecting ring b47. The air intake mechanism support frame b45 is fixed in the rotary kiln furnace tube, the air intake mechanism connecting plate b46 is fixed on the air intake mechanism support frame b45, and the rotating connecting ring b47 is rotatably provided on the heating section pipeline b41 and the exhaust section pipeline b43, and the rotating connecting ring b47 is fixedly connected to the air intake mechanism connecting plate b46. Specifically, a group of air intake mechanism supports are provided at both ends of the exhaust section pipeline b43. The rotating connecting ring b47 is specifically a graphite ring, and a retaining ring is also provided on the outside of the graphite ring. The air intake mechanism support frame b45 is specifically a bent plate welded to the inner wall of the rotary kiln furnace tube. The bent plate structure can absorb thermal expansion, thereby preventing the air intake mechanism support frame b45 from causing deformation of the rotary kiln furnace tube and cracking of the weld due to thermal expansion.

[0046] like Figure 6 As shown, in this embodiment, the kiln head feed section b1 is connected to a feeding mechanism b6, which includes a main silo b61, a feeder b62, and a buffer silo b63. ​​The output of the main silo b61 is connected to the input of the feeder b62, the output of the feeder b62 is connected to the input of the buffer silo b63, and the output of the buffer silo b63 is connected to the kiln head feed section b1. Specifically, the feeding mechanism b6 enables continuous feeding without stopping the furnace. The feeding method is to feed from the top of the kiln head, avoiding interference with the heating section of the metal vapor inlet mechanism b4. A pneumatic butterfly valve is installed between the main silo b61 and the feeder b62. The feeder b62 is specifically a screw feeder. After the sintered material enters the main silo b61 through its top feed port, shielding gas is introduced into the shielding gas inlets of the main silo b61 and the buffer silo b63 to displace the air within, ensuring that the material atmosphere entering the rotary kiln tubes meets the required requirements. Once this displacement is complete, the pneumatic butterfly valve and feeder b62 operate to convey the sintered material to the buffer silo b63. ​​The material then falls through the discharge pipe into the rotary kiln tubes under its own weight, completing the feeding process. A weighing sensor is installed at the bottom of the main silo b61 to accurately measure the material entering the kiln.

[0047] like Figure 7 and Figure 8 As shown, in this embodiment, the inner wall of the intermediate reaction section b2 is provided with a plurality of stir-frying plates b21 for stirring and lifting the material. One end of the stir-frying plates b21 is fixedly connected to the rotary kiln tube, and the other end is bent toward the direction of rotation of the rotary kiln tube. The stir-frying plates b21 are provided with a vibration mechanism for vibrating and dispersing the material on the stir-frying plates b21. The vibration mechanism includes a vibration rod b22 and a vibration head b23. The vibration head b23 is slidably mounted on the vibration rod b22. One end of the vibration rod b22 is fixed to the stir-frying plates b21, and the other end is provided with a stopper to prevent the vibration head b23 from falling off. Specifically, the inner wall of the intermediate reaction section b2 is arranged along its circumference in a group of eight stir-frying plates b21, and multiple groups are arranged along its axial direction. The stir-frying plates b21 are evenly staggered, and the vibration mechanism is installed on some of the stir-frying plates b21.

[0048] In this embodiment, spiral plates are installed on the inner walls of the kiln feed section b1 and the kiln discharge section b3 to transport materials backward. Between the stir-frying plate b21 and the spiral plates are multiple guide plates b24. These guide plates b24 are curved plates that spiral along the inner wall of the rotary kiln tube. Specifically, the guide plates b24 are located at the junction of the intermediate reaction section b2, the kiln feed section b1, and the kiln discharge section b3.

[0049] like Figure 9 As shown, in this embodiment, a sealing structure b5 is provided at the end of the kiln head feeding section b1 and the kiln tail discharging section b3, and the sealing structure b5 includes an end baffle plate b51 and an end head cover, and the end head cover includes an inner plate b52, an outer plate b53 and an end panel b54, the outer plate b53 is arranged on one side of the outer edge of the end panel b54, the inner plate b52 is arranged on the same side of the end panel b54, and the inner plate b52 is located on the inner side of the outer plate b53, the end baffle plate b51 is arranged at the end of the rotary kiln furnace tube, and one end thereof is sealedly connected to the inner plate b52 by a first sealing member b55, and the other end is sealedly connected to the outer plate b53 by a second sealing member b56, the end baffle plate b51, the inner plate b52, the outer plate b53 and the end panel b54 enclose an independent cavity b57, and a protective gas is passed through the independent cavity b57, and the pressure of the protective gas in the independent cavity b57 is greater than the gas pressure in the rotary kiln furnace tube. Specifically, the end cover is a cover body formed by an inner plate b52, an outer plate b53 and an end panel b54. The first sealing member b55 is a graphite packing, which is self-lubricating and can reduce running resistance and save energy consumption. The second sealing member b56 is a V-shaped sealing ring. The end panel b54 is provided with a protective gas inlet for introducing protective gas into the independent cavity b57.

[0050] In this embodiment, an external striking hammer for striking the rotary kiln tube is further provided on the outer wall of the rotary kiln tube.

[0051] In this embodiment, the entire continuous rotary kiln is arranged inclined along the direction of material flow, and the inclination angle is adjustable. The material entering the rotary kiln tube moves toward the discharge end along the inclined rotary kiln tube under the joint action of the spiral plate, the guide plate b24, the frying plate b21, the vibrating mechanism and the external percussion hammer, and finally flows out from the discharge port of the discharge section b3 at the end of the kiln, realizing continuous feeding and discharging without stopping the furnace, and the sintering time of the material in the rotary kiln tube can be adjusted by the inclination angle and rotation speed of the rotary kiln tube, thereby meeting the sintering requirements of different materials and different processes.

[0052] like Figure 10 As shown, the evaporation furnace a for preparing metal vapor in this embodiment includes a furnace body. Specifically, the heating area of ​​the furnace tube in the furnace body is made of SUS310S stainless steel, with a maximum operating temperature of 1000°C and a maximum temperature resistance of 1150°C. The furnace body includes: The air inlet section a1 is used to provide protective gas; The metal melting section a2 is used to melt the solid metal and form liquid metal; The metal evaporation section a3 is used to evaporate the metal liquid to form metal vapor. The metal melting section a2 is connected to the metal evaporation section a3. A metal liquid flow channel is provided between the metal melting section a2 and the metal evaporation section a3 for allowing the metal liquid to flow from the metal melting section a2 to the metal evaporation section a3. The output end of the air inlet section a1 is connected to the metal evaporation section a3. The furnace inlet section a4 is used to feed metal vapor into the continuous rotary kiln b. The input end of the furnace inlet section a4 is connected to the metal evaporation section a3.

[0053] In this embodiment, a liquid metal flow channel is provided with a liquid metal flow conduit a26, and a flow channel heater a25 is also provided on the liquid metal flow channel for regulating the temperature within the liquid metal flow conduit a26. Specifically, the diameter of the liquid metal flow conduit a26 can be selected from 1 to 10 mm. During use, the liquid metal flow conduit a26 can be replaced according to different process requirements to meet the requirements for different metal vapor flow rates under different process conditions. The flow channel heater a25 is arranged around the periphery of the liquid metal flow channel to precisely control the temperature within the liquid metal flow conduit a26.

[0054] In this embodiment, the metal liquid circulation channel and the metal liquid flow conduit a26 are both arranged vertically. The metal melting section a2 is positioned above the metal evaporation section a3, and the air inlet section a1 is positioned below the metal evaporation section a3. One side of the metal evaporation section a3 is connected to the output end of the air inlet section a1, and the other side is connected to the input end of the furnace inlet section a4. Specifically, the metal liquid circulation channel and the metal liquid flow conduit a26 are positioned between the metal melting section a2 and the metal evaporation section a3. The output end of the air inlet section a1 is positioned to the left of the metal evaporation section a3, and the input end of the furnace inlet section a4 is positioned to the right of the metal evaporation section a3. This creates a hot air flow from left to right within the metal evaporation section a3. This hot air flow cooperates with the metal liquid dripping downward from the top to achieve evaporation during its descent, thereby improving evaporation efficiency and ensuring the stability of the metal vapor supply.

[0055] In this embodiment, the metal evaporation section a3 includes an evaporation section furnace tube a31, which houses an evaporation crucible a32. One side of the evaporation crucible a32 is provided with an air inlet connected to the output of the air inlet section a1, and the other side is provided with an exhaust port connected to the input section of the furnace section a4. The top of the evaporation crucible a32 is provided with a liquid inlet connected to the metal liquid circulation channel. The metal evaporation section a3 also includes an evaporation section heater a33 and an evaporation section thermocouple for obtaining temperature information within the evaporation section furnace tube a31. Specifically, the evaporation section furnace tube a31 is made of SUS310S stainless steel. A metal partition is provided at its left end to separate the air inlet from the output of the air inlet section a1. The upper end is provided with a liquid inlet connected to the metal melting section a2. A central portion is provided to accommodate the evaporation crucible a32. The evaporation section furnace tube a31 has a maximum temperature resistance of 1150°C. The evaporation section heater a33 is a heating resistor module. The resistance wire is made of 0Gr27Al7Mo2. Four resistors are arranged in a circular pattern along the outer wall of the evaporation section furnace tube a31. The outer side of the evaporation section furnace tube a31 is lined with refractory material made from 1140 fiberboard. The evaporation crucible a32 is a graphite crucible made of graphite. The evaporation crucible a32 consists of a cylinder and two end caps connected by threads. The cylinder and end caps are provided with an air inlet, an exhaust port, and a liquid inlet. The evaporation section thermocouple is an armored nickel-chromium-nickel-silicon thermocouple, installed by pipe welding to the mounting base. The temperature range is 0-1050°C and the protection level is IP68.

[0056] In this embodiment, the metal melting section a2 includes a melting section furnace tube a21, which houses a melting crucible a22. The bottom of melting crucible a22 is provided with a drain port connected to a metal liquid flow channel. The metal melting section a2 also includes a melting section heater a23 and a melting section thermocouple for acquiring temperature information within the melting section furnace tube a21. The metal melting section a2 is also provided with a metal feeding mechanism a27 for adding solid metal raw material to the melting crucible a22. The metal feeding mechanism a27 is connected to the melting crucible a22. The metal melting section a2 is provided with a metal feeding port, which is connected to the metal feeding port via a flange and a pneumatic butterfly valve. Both the metal feeding mechanism a27 and the metal melting section a2 are provided with ventilation inlets and exhaust ports, which replace the internal air through the ventilation inlets and exhaust ports to achieve a uniform atmosphere. The metal feeding mechanism a27, in conjunction with the metal melting section a2, enables automatic feeding. The atmosphere within the metal feeding mechanism a27 is consistent with that within the metal melting section a2. Specifically, the melting section furnace tube a21 is constructed of SUS310S stainless steel. It features a U-shaped structure with an opening at its lower end welded to the evaporation section furnace tube a31. The melting section furnace tube a21 has a maximum temperature resistance of 1150°C. The melting section heater a23 is a heating resistor module with four resistor wires made of 0Gr27Al7Mo2, arranged in a ring along the outer wall of the melting section furnace tube a21. These resistors regulate the temperature within the melting crucible a22. The outer surface of the melting section furnace tube a21 is lined with refractory material made from 1140 fiberboard. The melting crucible a22 is a graphite crucible made of graphite. It consists of a cylinder and an end cap, which are threaded together. The end cap is equipped with a ventilation port and a metal feed port connected to the metal feeding mechanism a27. The melting section thermocouple is an armored nickel-chromium-nickel-silicon thermocouple, installed by pipe welding to the mounting base. The temperature range is 0-1050°C, and the protection level is IP68.

[0057] In this embodiment, the air intake section a1 includes an air intake pipe a11, and the input end of the air intake pipe a11 is provided with an air intake connector a14 for connecting to the air source. The air intake pipe a11 includes multiple pipeline layers, each pipeline layer includes multiple branch pipes and a main pipe for connecting adjacent pipeline layers, and an air intake section heating element a12 for preheating the protective gas in the air intake pipe a11 is provided between adjacent pipeline layers. The air intake section a1 is also provided with an air intake section thermocouple for obtaining temperature information in the air intake section a1. Specifically, the inlet pipe a11 is constructed of SUS310S stainless steel and is located in the lower portion of the furnace body. It is divided into four upper and lower layers, each consisting of two main pipes and ten branch pipes. The two main pipes are located at either end of the branch pipes and interconnect them. The main pipes provide vertical connectivity, and the main pipes between adjacent layers are also interconnected. The branch pipes are used for gas preheating, with a maximum temperature resistance of 1150°C. Calculated to ensure the shielding gas flow rate and preheating temperature, this layout of the inlet pipe a11 meets the required space for piping while ensuring effective preheating. The inlet section thermocouples are heating resistor modules, made of 0Gr27Al7Mo2 material. They are arranged vertically, following the horizontal layout of the inlet pipe a11. Similarly, there are four upper and lower layers, with five heating resistor modules per layer, connected in series using a plug-in connection. The outer surface of the inlet section a1 is lined with refractory material, made from 1140 fiberboard. The air inlet section thermocouple uses armored nickel-chromium-nickel-silicon thermocouple, which is installed by pipe welding mounting base. The temperature range is 0~1050℃ and the protection level is IP68.

[0058] In this embodiment, the furnace entry section a4 includes a furnace entry pipe a41 for transporting metal vapor from the evaporation furnace a to the continuous rotary kiln b. One end of the furnace entry pipe a41 communicates with the metal evaporation section a3 and the other end communicates with the interior of the continuous rotary kiln b. The furnace entry section a4 also includes a furnace entry heater a42 and a furnace entry thermocouple for acquiring temperature information within the furnace entry section a4. Specifically, the furnace entry pipe a41 is made of SUS310S stainless steel with a maximum temperature resistance of 1150°C. The furnace entry heater a42 is a heating resistor module with a resistance wire made of 0Gr27Al7Mo2. The furnace entry section a4 is lined with a refractory material made of 1140 fiberboard. The heating resistor module is arranged in a ring inside the refractory material, with a direct plug-in series connection. The furnace entry thermocouple is an armored nickel-chromium-nickel-silicon thermocouple, mounted using a pipe-welded mounting base. It has a temperature range of 0-1050°C and an IP68 protection rating. A protective cover is also provided on the furnace inlet section a4. The protective cover is made of SUS310S stainless steel and is used to support the refractory material and prevent dust from entering the heating area.

[0059] In this embodiment, the evaporation furnace a also includes a support bracket a5, a guide rail a6, and multiple rollers a7. The guide rail a6 is located at the bottom of the evaporation furnace a, and the furnace body is mounted on the support bracket a5. The rollers a7 are located at the bottom of the support bracket a5 and are movably mounted on the guide rail a6. The support bracket a5 is also equipped with a weighing sensor. Specifically, the support bracket a5 is made of 304 stainless steel square steel. The bottom of the support bracket a5 is equipped with four nylon wheels, which are mounted on the guide rail a6, allowing the support bracket a5 to move horizontally on the guide rail a6. The guide rail a6 is made of 304 channel steel. A baffle is installed at the end of the guide rail a6 to prevent the support bracket a5 from rolling off the guide rail a6. The entire guide rail a6 is fixed to the floor slab with expansion bolts.

[0060] The sintering method of this embodiment uses the above-mentioned sintering device to perform sintering, and includes the following steps: S1, feeding the material to be sintered into the rotary kiln tube from the kiln head feeding section b1; S2, evaporation furnace a prepares metal vapor and transports the prepared metal vapor to continuous rotary kiln a; S3, continuously transporting the material to be sintered from the kiln head to the kiln tail, and reacting the material to be sintered with the metal vapor introduced by the metal vapor inlet mechanism b4 when passing through the intermediate reaction section b2; S4. After sintering, the sintered products are continuously transported to the kiln tail discharge section b3, and then discharged from the continuous rotary kiln a through the kiln tail discharge section b3, thereby realizing continuous sintering production.

[0061] Step S2 specifically includes: S21, adding metal solid raw materials into the metal melting section a2; S22, introducing protective gas into the evaporation furnace a through the air inlet section a1 to replace the gas in the evaporation furnace a; S23. Start the evaporation furnace a. The metal melting section a2 melts the solid metal raw material into liquid metal. The liquid metal flows into the metal evaporation section a3 through the metal liquid circulation channel. The liquid metal is uniformly evaporated to form metal vapor under the combined action of the heating of the metal evaporation section a3 and the protective gas preheated and output by the air inlet section a1. The metal vapor is then fed into the continuous rotary kiln b through the furnace inlet section a4. S24. When it is detected that the metal vapor concentration decreases, metal solid raw materials can be added into the metal melting section a2 through the metal feeding mechanism a27.

[0062] Although the present invention has been disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, utilize the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. A continuous rotary kiln, comprising a rotary kiln tube, characterized in that: The rotary kiln tube comprises: The kiln head feeding section (b1) is used to feed the material to be sintered into the rotary kiln tube and transport it backward; The intermediate reaction section (b2) is used for the sintering reaction between the material to be sintered and the metal vapor to obtain a sintered product after the sintering is completed. One end of the intermediate reaction section (b2) is connected to the kiln head feeding section (b1); The kiln tail discharge section (b3) is used to transport the sintered products backward and discharge them from the rotary kiln tube after sintering. The other end of the intermediate reaction section (b2) is connected to the kiln tail discharge section (b3); The continuous rotary kiln also includes a metal vapor intake mechanism (b4) for introducing metal vapor into the intermediate reaction section (b2). The metal vapor intake mechanism (b4) is arranged in the rotary kiln tube and extends from the kiln head feeding section (b1) to the intermediate reaction section (b2). The input end of the metal vapor intake mechanism (b4) is provided with an evaporation furnace interface for communicating with an evaporation furnace (a) for preparing metal vapor.

2. The continuous rotary kiln according to claim 1, characterized in that The metal vapor intake mechanism (b4) includes a heating section and an exhaust section, wherein the heating section is arranged in the kiln head feeding section (b1), and the exhaust section is arranged in the intermediate reaction section (b2). The heating section includes a heating section pipeline (b41) and a heating section heating element (b42) for heating the metal vapor in the heating section pipeline (b41), and the heating section heating element (b42) is arranged on the periphery of the heating section pipeline (b41). The exhaust section includes an exhaust section pipeline (b43), and the exhaust section pipeline (b43) is connected to the heating section pipeline (b41). The exhaust section pipeline (b43) is provided with a plurality of exhaust holes (b44) for introducing metal vapor into the intermediate reaction section (b2).

3. The continuous rotary kiln according to claim 2, characterized in that: The exhaust hole (b44) is arranged toward the material accumulation direction in the intermediate reaction section (b2), and the aperture of the exhaust hole (b44) gradually increases in a direction away from the heating section.

4. The continuous rotary kiln according to claim 2, characterized in that: The metal vapor air intake mechanism (b4) also includes an air intake mechanism support member for supporting the heating section and the exhaust section, and the air intake mechanism support member includes an air intake mechanism support frame (b45), an air intake mechanism connecting plate (b46) and a rotating connecting ring (b47). The air intake mechanism support frame (b45) is fixed in the rotary kiln furnace tube, the air intake mechanism connecting plate (b46) is fixed on the air intake mechanism support frame (b45), and the rotating connecting ring (b47) is rotatably provided on the heating section pipeline (b41) and the exhaust section pipeline (b43), and the rotating connecting ring (b47) is fixedly connected to the air intake mechanism connecting plate (b46).

5. The continuous rotary kiln according to claim 1, characterized in that: The kiln head feeding section (b1) is connected to a feeding mechanism (b6), and the feeding mechanism (b6) includes a main silo (b61), a feeder (b62) and a buffer silo (b63). The output end of the main silo (b61) is connected to the input end of the feeder (b62), the output end of the feeder (b62) is connected to the input end of the buffer silo (b63), and the output end of the buffer silo (b63) is connected to the kiln head feeding section (b1).

6. The continuous rotary kiln according to claim 1, characterized in that: A plurality of stir-frying plates (b21) for turning and lifting the material are provided on the inner wall of the intermediate reaction section (b2), one end of the stir-frying plate (b21) is fixedly connected to the rotary kiln furnace tube, and the other end is bent toward the rotation direction of the rotary kiln furnace tube, and the stir-frying plate (b21) is provided with a vibrating mechanism for vibrating and dispersing the material on the stir-frying plate (b21), the vibrating mechanism includes a vibrating rod (b22) and a vibrating head (b23), the vibrating head (b23) is slidably provided on the vibrating rod (b22), one end of the vibrating rod (b22) is fixedly provided on the stir-frying plate (b21), and the other end is provided with a limiting portion for limiting the vibrating head (b23) to prevent it from falling off.

7. The continuous rotary kiln according to claim 6, characterized in that: The inner walls of the kiln head feeding section (b1) and the kiln tail discharging section (b3) are provided with spiral plates for conveying materials backward, and a plurality of material guide plates (b24) are provided between the frying plate (b21) and the spiral plates. The material guide plates (b24) are arc-shaped plates that spirally extend along the inner wall of the rotary kiln furnace tube.

8. The continuous rotary kiln according to claim 1, characterized in that: The ends of the kiln head feeding section (b1) and the kiln tail discharging section (b3) are provided with a sealing structure (b5), the sealing structure (b5) includes an end baffle plate (b51) and an end head cover, the end head cover includes an inner plate (b52), an outer plate (b53) and an end panel (b54), the outer plate (b53) is arranged on one side of the outer edge of the end panel (b54), the inner plate (b52) is arranged on the same side of the end panel (b54), and the inner plate (b52) is located on the inner side of the outer plate (b53), the end baffle plate (b51) ) is arranged at the end of the rotary kiln furnace tube, and one end thereof is sealedly connected to the inner plate (b52) through a first seal (b55), and the other end is sealedly connected to the outer plate (b53) through a second seal (b56), the end baffle plate (b51), the inner plate (b52), the outer plate (b53) and the end panel (b54) are enclosed to form an independent cavity (b57), and protective gas is passed through the independent cavity (b57), and the pressure of the protective gas in the independent cavity (b57) is greater than the gas pressure in the rotary kiln furnace tube.

9. A sintering device, characterized in that: It comprises an evaporation furnace (a) for preparing metal vapor and a continuous rotary kiln (b) according to any one of claims 1 to 8, wherein the metal vapor output end of the evaporation furnace (a) is connected to the evaporation furnace interface of the continuous rotary kiln (b).

10. The sintering device according to claim 9, characterized in that: The evaporation furnace (a) includes a furnace body, and the furnace body includes: The air inlet section (a1) is used to provide protective gas; The metal melting section (a2) is used to melt the solid metal and form liquid metal; The metal evaporation section (a3) ​​is used to evaporate the metal liquid to form metal vapor. The metal melting section (a2) is connected to the metal evaporation section (a3), and a metal liquid flow channel is provided between the metal melting section (a2) and the metal evaporation section (a3) ​​for allowing the metal liquid to flow from the metal melting section (a2) to the metal evaporation section (a3). The output end of the air inlet section (a1) is connected to the metal evaporation section (a3); The furnace entry section (a4) is used to send the metal vapor into the continuous rotary kiln (b), and the input end of the furnace entry section (4) is connected to the metal evaporation section (a3).

11. The sintering device according to claim 10, characterized in that: A metal liquid flow guide tube (a26) is provided in the metal liquid flow channel, and a flow channel heating element (a25) for regulating the temperature in the metal liquid flow guide tube (a26) is also provided on the metal liquid flow channel; The metal liquid circulation channel and the metal liquid guide tube (a26) are both arranged in a vertical direction, the metal melting section (a2) is arranged above the metal evaporation section (a3), and the air intake section (a1) is arranged below the metal evaporation section (a3). One side of the metal evaporation section (a3) ​​is connected to the output end of the air intake section (a1), and the other side is connected to the input end of the furnace intake section (a4).

12. A sintering method, characterized in that: The sintering device according to any one of claims 9 to 11 is used for sintering, comprising the following steps: S1, feeding the material to be sintered into the rotary kiln tube from the kiln head feeding section (b1); S2, an evaporation furnace (a) prepares metal vapor and transports the prepared metal vapor to a continuous rotary kiln (a); S3, continuously transporting the material to be sintered from the kiln head to the kiln tail, and when the material to be sintered passes through the intermediate reaction section (b2), it undergoes a sintering reaction with the metal vapor introduced by the metal vapor inlet mechanism (b4); S4. After sintering, the sintered products are continuously transported to the kiln tail discharge section (b3), and then discharged from the continuous rotary kiln (a) through the kiln tail discharge section (b3), thereby realizing continuous sintering production.

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