A high-efficiency energy-saving powder spheroidizing furnace for producing spherical silicon micro-powder

Abstract

The application relates to a high-efficiency energy-saving powder spheroidizing furnace for producing spherical silicon micro-powder, which comprises a gas inlet pipe, an adjusting pipe and an extension pipe connected in sequence, and the three pipes are coaxially arranged in the vertical direction. A plurality of adjusting plates are arranged in the adjusting pipe in a concentric distribution in the form of an annular array. The bottom end of the adjusting plate is hinged to the inner wall of the bottom of the outer pipe, the top is connected with the adjacent adjusting plate through a first sealing element, and is sealingly matched with the top end of the outer pipe through a second sealing element. An air bag is arranged between the adjusting plate and the outer pipe, which is used for driving the synchronous swing of the adjusting plate, adjusting the inner diameter of the pipeline and controlling the flow rate of the airflow. A flow guide mechanism is arranged on each adjusting plate, which comprises a rotatably arranged base ring and a flow guide fin. The sidewall of the flow guide fin is provided with a screw hole, which is connected with the inner wall of the outer pipe through a push rod, so that the angle of the flow guide fin can be adjusted, and the rotation direction and intensity of the airflow are adjusted and controlled. The structure design is reasonable, the airflow is flexibly adjusted, and the uniformity and energy efficiency of the powder spheroidizing process are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of high-temperature processing equipment, in particular to a high-efficiency and energy-saving powder spheroidization furnace for producing spherical silicon micro-powder. BACKGROUND

[0002] In the spheroidization process of powder materials, the powder usually needs to be transported by high-speed airflow and heated and melted in the spheroidization furnace to form particles with high sphericity. The material spraying method of the traditional spheroidization furnace mainly relies on direct spraying by the nozzle or a single-stage diffusion cone, so that the powder is unevenly distributed when entering the spheroidization zone, which is easy to cause local accumulation or excessive concentration, thereby affecting the uniformity of spheroidization. Due to the effect of airflow turbulence, part of the powder may directly hit the inner wall of the furnace, resulting in material loss and reducing the yield. SUMMARY

[0003] The purpose of the present application is to provide a high-efficiency and energy-saving powder spheroidization furnace for producing spherical silicon micro-powder to solve the problems raised in the background.

[0004] To achieve the above purpose, the present application provides the following technical scheme: a high-efficiency and energy-saving powder spheroidization furnace for producing spherical silicon micro-powder, comprising:

[0005] An air inlet pipe is arranged in the vertical direction of the ground;

[0006] An adjusting pipe is arranged at the top end of the air inlet pipe;

[0007] An extension pipe is arranged at the top end of the adjusting pipe;

[0008] The adjusting pipe comprises:

[0009] An outer pipe is connected between the air inlet pipe and the extension pipe;

[0010] A plurality of adjusting plates are arranged in a concentric ring array in the inner cavity of the outer pipe, and the bottom end of the adjusting plate is hinged to the inner wall of the bottom end of the outer pipe;

[0011] A plurality of first sealing members are arranged between every two adjacent adjusting plates;

[0012] A second sealing member is arranged between the top end of the plurality of adjusting plates and the inner wall of the top end of the outer pipe;

[0013] A plurality of flow guide mechanisms are arranged on the plurality of adjusting plates, respectively;

[0014] An air bag is arranged between the adjusting plate and the inner wall of the outer pipe;

[0015] The flow guide mechanism comprises:

[0016] A base ring is rotatably arranged on the adjusting plate;

[0017] A guide vane is rotatably arranged in the inner cavity of the base ring and has a screw hole formed in the side wall of the guide vane along the axial direction of the base ring.

[0018] A push rod is rotatably connected to the inner wall of the outer tube at one end and is screwed into the screw hole at the other end.

[0019] Preferably, the rotatable angle of the adjusting plate is between 6° and 12°.

[0020] Preferably, the plurality of guide mechanisms are arranged in a spiral structure in the inner cavity of the outer tube.

[0021] Preferably, the rotatable angle of the guide vane is between 9° and 18°.

[0022] Preferably, the first sealing member and the second sealing member are elastically connected.

[0023] Preferably, the air bag has a ring structure and is located between the inner wall of the outer tube and the outer wall of the plurality of adjusting plates, and the air bag has a plurality of independent cavities inside, each of which is equipped with the same air inlet pipe.

[0024] Preferably, the first sealing member and the second sealing member have a multi-layer flexible structure, which can ensure the sealing effect between the adjusting plate and the outer tube, and the second sealing member can maintain the smooth connection between the adjusting tube and the extension tube.

[0025] Preferably, the outer wall of the adjusting tube is covered with a heat insulation material.

[0026] Preferably, the bottom end of the air inlet pipe is provided with a variable diameter structure, so that the air inlet pipe forms a contraction section near the bottom end, and a feeding pipe is connected to the side wall of the contraction section.

[0027] The high-efficiency energy-saving powder spheroidizing furnace for producing spherical silicon micro-powder has the beneficial effects that: the high-efficiency energy-saving powder spheroidizing furnace for producing spherical silicon micro-powder provided by the application ensures the stable conveying of the airflow along the central axis by setting the coaxial connection structure of the air inlet pipe, the adjusting tube and the extension tube, improves the uniformity of the powder entering the spheroidizing zone, and adjusts the angle of the adjusting plate in the adjusting tube by the air bag, adjusts the pipe diameter according to the actual working condition, and then adjusts the airflow velocity and distribution, improves the adaptability to different particle size powders, avoids the powder aggregation, and adjusts the angle by the sealing member arranged between the adjusting plates, ensures the air tightness while allowing the angle adjustment, and has a reliable structure. The guide mechanism arranged on the adjusting plate includes a base ring, a guide vane and a push rod, which can adjust the rotation direction of the airflow, guide the powder to form stable rotational flow, and improve the spheroidizing uniformity and sphericity. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a schematic diagram of the structure of the present application;

[0029] Figure 2 is a schematic diagram of the local structure of the present application;

[0030] Figure 3 is a schematic diagram of the adjusting pipe of the present application;

[0031] Figure 4 is a schematic diagram of the flow guide mechanism of the present application;

[0032] Figure 5 is a schematic diagram of the airflow guiding device of the present application;

[0033] Figure 6 is a schematic diagram of the uniform scattering device of the present application;

[0034] Figure 7 is a schematic diagram of the uniform scattering device of the present application;

[0035] Figure 8 is a schematic diagram of the uniform scattering device of the present application;

[0036] In the figure: 11, furnace body, 12, shell, 21, air inlet pipe, 22, contraction section, 3, adjusting pipe, 31, outer pipe, 32, adjusting plate, 33, first sealing element, 34, second sealing element, 35, flow guide mechanism, 351, base ring, 352, flow guide piece, 353, push rod, 36, air bag, 4, extension pipe, 5, uniform scattering device, 501, first driving motor, 502, uniform scattering disc, 503, groove, 504, bottom plate, 505, uniform scattering belt, 506, first protrusion, 507, second protrusion, 508, sliding groove, 509, driving rod, 510, driving groove, 6, airflow guiding device, 61, second driving motor, 62, support, 63, air conveying pipe, 64, air nozzle, 65, connecting rod, 66, auxiliary air pipe, 7, feeding pipe. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0038] Please refer to Figures 1-8 The present application provides a high-efficiency energy-saving powder spheroidizing furnace technical solution for producing spherical silicon micro-powder. The detailed connection means is a well-known technology in the art, and the working principle and process are mainly introduced below. The specific work is as follows.

[0039] The application discloses a high-efficiency and energy-saving powder spheroidizing furnace for producing spherical silicon powder.

[0040] The air inlet pipe 21 is arranged along the vertical ground direction, the adjusting pipe 3 is arranged at the top end of the air inlet pipe 21, is used for adjusting the air flow velocity and flow field distribution entering the extension pipe 4, and ensures the uniformity and controllability of powder conveying under different working conditions, the extension pipe 4 is arranged at the top end of the adjusting pipe 3, the air inlet pipe 21, the adjusting pipe 3 and the extension pipe 4 are coaxially arranged and are located at the central axis of the furnace body 11, so that the symmetry of the whole air flow conveying channel is ensured, powder deviation caused by uneven air flow is reduced, the extension pipe 4 is completely located in the furnace body 11, the adjusting pipe 3 is partially located in the furnace body 11, and a gap is formed between the top end of the extension pipe 4 and the top of the furnace body 11, which is a material discharge area; through the gap, the powder can be uniformly diffused under the action of the air flow, so that the powder accumulation caused by concentrated injection is avoided, the uniform diffusion device 5 is arranged on the inner top surface of the furnace body 11, and the uniform diffusion device 5 and the extension pipe 4 are located on the same axis, so that the powder can keep a stable flow track after entering the spheroidizing area, the local concentration is prevented from being too high to affect the spheroidizing quality, and the conveying precision is improved, the air flow guide device 6 is arranged on the outer top surface of the furnace body 11, and the air outlet end of the air flow guide device 6 extends to the inner cavity of the furnace body 11, a shell 12 is arranged outside the air flow guide device 6 and protects the air flow guide device 6, the device is used for providing auxiliary air flow, adjusting the powder spraying path, preventing the material from directly impacting the furnace wall, improving the spheroidizing uniformity of the material, and the spheroidizing area, the cooling area and the material collecting area in the furnace body 11 are not shown in the figure.

[0041] The adjusting pipe 3 comprises an outer pipe 31, a plurality of adjusting plates 32, a plurality of first sealing members 33, a second sealing member 34, a plurality of flow guide mechanisms 35 and an air bag 36.

[0042] The outer tube 31 is connected between the air inlet pipe 21 and the extension pipe 4, forming a stable intermediate support structure, so that the adjusting pipe 3 can be kept coaxial in the spheroidizing furnace, improving the stability and controllability of the gas flow delivery. A plurality of adjusting plates 32 are arranged in a concentric ring array in the inner cavity of the outer tube 31. The bottom end of the adjusting plate 32 is hinged to the inner wall of the bottom end of the outer tube 31, so that the adjusting plate 32 can be adjusted symmetrically around the central axis, thereby controlling the inner diameter of the gas flow passage and ensuring the uniformity of the flow velocity and flow field of the powder before entering the spheroidizing zone. A plurality of first sealing members 33 are arranged between every two adjacent adjusting plates 32, ensuring that the adjusting plates 32 can still maintain good sealing effect when rotating and adjusting, preventing gas leakage. A second sealing member 34 is arranged between the top end of the plurality of adjusting plates 32 and the inner wall of the top end of the outer tube 31, further strengthening the sealing structure and adapting to the deformation when the adjusting angle of the adjusting plate 32 is adjusted, ensuring the integrity of the gas flow path and reducing the influence of turbulence. A plurality of flow guiding mechanisms 35 are arranged on the plurality of adjusting plates 32, so that the direction of the gas flow entering the spheroidizing zone can be adjusted, optimizing the rotational diffusion of the powder and improving the dispersion degree of the powder, preventing local accumulation. An air bag 36 is arranged between the adjusting plate 32 and the inner wall of the outer tube 31, which is used to synchronously control the angle adjustment of all adjusting plates 32.

[0043] The flow guiding mechanism 35 includes a base ring 351, a flow guiding piece 352, and a push rod 353.

[0044] The base ring 351 is rotationally arranged on the adjusting plate 32, and the rotation axis of the base ring 351 is along the radial direction of the adjusting pipe 3, so that it can be adjusted synchronously when the adjusting plate 32 swings, ensuring that the angle adjustment of the flow guiding piece 352 will not be restricted, improving the flexibility and controllability of the gas flow guiding, and the rotation of the base ring 351 can compensate for the relative position change of the adjusting plate 32 at different angles, avoiding the movement restriction caused by the rigid structure. The flow guiding piece 352 is rotationally arranged in the inner cavity of the base ring 351, and the rotation axis of the flow guiding piece 352 is perpendicular to the rotation axis of the base ring 351. The rotation axis of the base ring 351 is parallel to the rotation axis of the adjusting plate 32. A screw hole is formed in the side wall of the flow guiding piece 352 along the axial direction of the base ring 351. One end of the push rod 353 is rotationally connected to the inner wall of the outer tube 31, and the rotation axis between the push rod 353 and the outer tube 31 is parallel to the rotation axis of the base ring 351. The other end of the push rod 353 is screwed into the screw hole. This screwing structure allows the angle of the flow guiding piece 352 to be adjusted by adjusting the depth of the push rod 353 in the screw hole. The rotation axis between the push rod 353 and the inner wall of the outer tube 31 is parallel to the rotation axis of the base ring 351. The two parallel rotation points allow the push rod 353 to be appropriately inclined for angle compensation when the adjusting plate 32 swings. At the same time, when the angle of the push rod 353 changes, the relative position between the push rod 353 and the flow guiding piece 352 changes, thereby preventing the push rod 353 from restricting the free swing of the adjusting plate 32.

[0045] The uniform-distributing device 5 comprises a first driving motor 501, a uniform-distributing disc 502, a bottom plate 504, a uniform-distributing belt 505, a first protrusion 506, a second protrusion 507, a driving rod 509 and a driving groove 510.

[0046] The first driving motor 501 is arranged at the central position of the inner top surface of the furnace body 11, and is used for providing rotating torque for the uniform scattering structure. The output end of the first driving motor 501 faces downward, and the driving device is coaxially connected with the rotating assembly, so that the stable operation is ensured. The uniform scattering disc 502 is fixedly installed on the driving end output shaft of the first driving motor 501, and the whole is arranged in the horizontal direction and rotates, and is used for driving the bottom uniform scattering device 5 to realize the dynamic scattering function when rotating. The bottom surface of the uniform scattering disc 502 faces the discharge port, and at least one groove 503 is formed in the bottom surface of the uniform scattering disc 502, and is used for installing the bottom plate 504 and the uniform scattering belt 505 and other assemblies, so that the reciprocating disturbance of the uniform scattering mechanism is realized. The inner top surface of the groove 503 is provided with a sliding groove 508 along the length direction of the groove 503. The sliding groove 508 is used as a limiting and guiding structure, is used for restricting the moving track of the driving rod 509, and ensures that the driving rod 509 generates accurate and controllable linear sliding in the rotating process of the uniform scattering disc 502.The bottom plate 504 is arranged in the groove 503, and the outer circumferential surface of the bottom plate 504 is smoothly processed, for mounting the uniform distribution belt 505 and providing a movement guide surface, the uniform distribution belt 505 is slidingly arranged on the outer wall of the bottom plate 504, arranged in a ring shape, the bottom plate 504 is arranged in the groove 503, and a gap is reserved between the bottom plate 504 and the groove bottom of the groove 503, forming a structure similar to a track, and the bottom plate 504 can be periodically reciprocated around the bottom plate 504, for disturbing, dispersing and diffusing the powder material, the first protrusion 506 is arranged on the outer surface of the uniform distribution belt 505, through the rotation of the uniform distribution disc 502, the first protrusion 506 is periodically reciprocated in the horizontal direction with the uniform distribution belt 505, forming a dynamic disturbance track, the second protrusion 507 is arranged on the bottom surface of the uniform distribution disc 502, the first protrusion 506 not only rotates with the uniform distribution disc 502, but also reciprocates on the bottom plate 504, the second protrusion 507 only rotates with the uniform distribution disc 502, due to the existence of rotation and reciprocation, the first protrusion 506 can disturb and mix the powder material contacted more comprehensively, the reciprocating design makes the first protrusion 506 agitates the material in a larger range, thereby improving the uniform distribution effect of the material, the second protrusion 507 can assist in transmission, providing stable movement output in the rotation process of the uniform distribution disc 502, the cooperation design of the first protrusion 506 and the second protrusion 507 can form comprehensive stirring and dispersing of the material, the first protrusion 506 is responsible for disturbance and dispersion in a large range, and the second protrusion 507 supplements the stirring of the edge area in the rotation process, through this structure design, the uniform distribution and diffusion of the powder material can be better realized, and the working efficiency and stability of the device are improved, the driving rod 509 is slidingly arranged in the sliding groove 508, and the bottom end of the driving rod 509 is connected with the uniform distribution belt 505, the driving groove 510 is opened in the inner top surface of the furnace body 11, and the top end of the driving rod 509 is slidingly arranged in the driving groove 510, the driving groove 510 cooperates with the sliding groove 508 to enable the driving rod 509 to realize linear radial displacement in the rotation movement, thereby driving the uniform distribution belt 505 to periodically slide, forming continuous and uniform dispersion disturbance of the material, the driving groove 510 is periodically undulating in a wave curve on the plane, extends in the circumferential direction, the wave peak is outward, and the wave valley is inward, so as to realize the regular radial movement of the driving rod 509.

[0047] The airflow guiding device 6 comprises a second driving motor 61, a support 62, a gas conveying pipe 63, a gas nozzle 64, a connecting rod 65 and an auxiliary gas pipe 66.

[0048] The second driving motor 61 is arranged on the outer top surface of the furnace body 11 and provides driving rotation or swing power for the support 62 to change the inclination angle of the gas conveying pipe 63, so that the airflow direction is controllable, and the jet angle is convenient to adjust to match the change of the material falling point. The support 62 is arranged at the output end of the second driving motor 61 and serves as a power transmission component to rotate or swing in linkage with the gas conveying pipe 63 and the connecting rod 65, thereby supporting the stable operation of the whole guiding structure. The bottom end of the gas conveying pipe 63 extends into the furnace body 11, and the ball head connection is adopted between the gas conveying pipe 63 and the upper wall of the furnace body 11. The bottom end of the gas conveying pipe 63 is provided with the gas nozzle 64, so that the jet airflow can directly act on the powder movement area inside the furnace body 11 to form accurate airflow guiding. The ball head connection is adopted between the connecting rod 65 and the support 62, and the bottom end of the connecting rod 65 is in sliding connection with the top end of the gas conveying pipe 63, so that the distance between the gas nozzle 64 and the support 62 can be changed when the support 62 rotates or the gas conveying pipe 63 adjusts the angle. The sliding connection between the connecting rod 65 and the gas conveying pipe 63 will cooperate to change the distance between them to realize the length compensation between the connecting rod 65 and the gas conveying pipe 63, thereby ensuring that the whole gas path is not pulled off or excessively squeezed. One end of the auxiliary gas pipe 66 is connected to the gas conveying pipe 63, and the other end of the auxiliary gas pipe 66 extends out of the shell 12 and is connected to the gas source to supply gas to the nozzle, thereby ensuring that the jet gas can be continuously supplied.

[0049] The rotatable angle of the adjusting plate 32 is between 6° and 12°. By synchronously swinging the adjusting plate 32, the size of the pass of the adjusting pipe 3 can be accurately controlled, the airflow velocity and distribution are optimized, when the inner diameter is large (the adjusting plate 32 is deflected by 6°), the airflow is smooth, the flow velocity can be reduced, and it is suitable for the stable conveying of fine powder. When the inner diameter is small (the adjusting plate 32 is deflected by 12°), the airflow velocity is increased, which is helpful for the rapid suspension conveying of powder, reduces the aggregation of powder, and adapts to the conveying requirements of powder with different particle sizes, improves the spheroidization uniformity, optimizes the airflow dynamic adjustment, improves the energy efficiency, the synchronous swinging of the adjusting plate 32 changes the shape of the airflow channel, so that the airflow generates different rotational flow or directional flow, thereby affecting the flow trajectory of the powder. When the angle is small (6°), the powder movement is stable, and it is suitable for powder with high spheroidization requirement. When the angle is large (12°), the dispersion effect of the airflow on the powder is enhanced, which is helpful for improving the distribution uniformity of fine powder, reducing the aggregation of powder, improving the spheroidization, and ensuring that the movement trajectory of powder with different particle sizes in the spheroidization furnace is controllable.

[0050] The several guide mechanisms 35 are arranged in a spiral structure in the inner cavity of the outer pipe 31 to form rotational flow of the airflow when passing through the adjusting plate 32. The angle of the spiral distributed guide vane 352 is adjustable, the rotational flow intensity of the powder can be controlled by adjusting different angles, it is suitable for high-speed airflow system, optimizes the rotational diffusion of powder, prevents the straight-line movement of powder from leading to concentrated accumulation, and improves the spheroidization uniformity.

[0051] The rotatable angle of the guide vane 352 is between 9°-18°, and the angle of the guide vane 352 of 9°-18° ensures uniform distribution of the powder in the airflow, prevents local accumulation, and improves sphericity. An excessively small angle (<9°) may cause the powder flow direction to be too parallel, affecting the diffusion effect of the powder in the spheroidization zone. An excessively large angle (>18°) may cause excessive cyclone, causing the powder to be excessively dispersed, affecting the uniformity of heating.

[0052] The structure of the first seal 33 and the second seal 34 forms an elastic connection, allowing the adjustment plate 32 to remain sealed when rotating, to ensure the stability of the internal airflow of the spheroidization furnace, ensure air tightness, prevent airflow leakage from affecting the spheroidization effect, and allow the adjustment plate 32 to move flexibly without affecting the airflow path.

[0053] The air bag 36 has a ring structure, and is located between the inner wall of the outer tube 31 and the outer wall of the plurality of adjustment plates 32. The air bag 36 is provided with a plurality of independent cavities, each cavity is equipped with the same air pipe, to ensure that the angles of the plurality of adjustment plates 32 change synchronously when inflating and deflating, avoid angle errors of the adjustment plate 32 caused by uneven internal air pressure of the air bag 36, ensure the angle consistency of all adjustment plates 32, improve the stability of powder conveying, avoid uneven adjustment of the adjustment plate 32 caused by local air pressure deviation of the air bag 36, and optimize the internal airflow control of the spheroidization furnace.

[0054] The first seal 33 and the second seal 34 adopt a multi-layer flexible structure, which ensures the sealing effect between the adjustment plate 32 and the outer tube 31, and the second seal 34 can keep the smooth connection of the adjustment tube 3 and the extension tube 4, so that the second seal 34 automatically deforms when the adjustment plate 32 rotates, to ensure smooth transition of the air path, avoid turbulence and local airflow deviation.

[0055] The outer wall of the adjustment tube 3 is covered with a heat insulation material, and the heat insulation material adopts a flexible gradual structure at the connection with the air inlet pipe 21 and the extension tube 4, which smoothly fits the pipe wall through layer thickness change or elastic transition, to reduce structural deformation and airflow instability caused by thermal gradient mutation, ensure smooth transition of the heat insulation layer and the pipe wall, reduce turbulence, avoid local heat loss, improve heat insulation effect, reduce material stress caused by temperature difference, and improve service life. The position temperature of the adjustment tube 3 is about 250°C-400°C, to ensure long-term stable work of rubber seals, air bags 36 and flexible connection structures.

[0056] The air inlet pipe 21 is provided with a variable diameter section near the bottom end, which is composed of a tapered section and a transition section, so that the air inlet flow rate changes in this area, and a feeding pipe 7 is arranged on the side wall of the variable diameter section, the axis direction of the feeding pipe 7 is at a certain angle with the axis direction of the air inlet pipe 21, so as to optimize the powder conveying effect, and the variable diameter structure is refined into a tapered section + transition section, the flowability is optimized, the axis of the air inlet pipe 21 is at an angle, not perpendicular, and the powder conveying uniformity is improved.

[0057] Working principle:

[0058] The high-temperature inert gas from the gas source enters the spheroidizing furnace in the vertical direction through the gas inlet pipe 21 arranged at the bottom of the furnace body 11. The gas inlet pipe 21 is provided with a variable-diameter section near the bottom end. The airflow accelerates at this point, forming a negative pressure suction force that drives the powder into the airflow channel through the feed pipe 7 arranged on the side wall of the variable-diameter section. Since the feed pipe 7 is connected at a certain angle with the gas inlet pipe 21, the powder can be smoothly introduced into the system along the airflow direction, avoiding backflow or blockage and ensuring uniformity of delivery. After the airflow mixes with the powder, it passes through the adjusting pipe 3 and the extension pipe 4 in sequence and rises to complete the delivery to the spheroidizing zone. In this process, the adjusting pipe 3 adjusts its inner diameter through multiple annularly distributed adjusting plates 32 to adapt to the required airflow speed for different particle sizes of powder. The swing of each adjusting plate 32 is driven by the air bag 36, which is provided with multiple compartments and achieves synchronous angle control of multiple adjusting plates 32 through uniform gas supply. When the passage diameter is small, the airflow accelerates, which is beneficial to the suspension of large-particle powder. When the passage diameter is large, the airflow decelerates, which is suitable for fine powder delivery, thereby adapting to the spheroidizing needs of different powders. The first sealing member 33 is arranged between the adjusting plates 32, and the second sealing member 34 is arranged between the top of the adjusting plate 32 and the outer pipe 31, forming an elastic sealing structure that can automatically deform when the adjusting plate 32 swings, maintaining airtightness, avoiding gas leakage, and ensuring airflow stability. The adjusting plate 32 also integrates a flow guide mechanism 35, which is composed of a rotatable base ring 351, a flow guide piece 352, and a push rod 353. When the angle of the adjusting plate 32 changes, the distance between the adjusting plate 32 and the inner wall of the outer pipe 31 changes, and the depth of the push rod 353 into the screw hole changes synchronously. By utilizing the screw connection between the push rod 353 and the screw hole, the angle of the flow guide piece 352 can be adjusted to guide the airflow to form a controllable rotational flow. This rotational flow structure can effectively improve the dispersity of the powder, prevent the powder from flowing linearly during the rising process, and enhance the pre-dispersion effect before spheroidizing. The airflow and powder mixture continues to rise along the extension pipe 4 to its top end, discharges through the gap between the top of the extension pipe 4 and the top wall of the furnace body 11, and enters the spheroidizing zone. To prevent the powder from directly impacting the furnace wall and affecting the spheroidizing quality, the furnace body 11 is provided with a uniform dispersion device 5, which is composed of a uniform dispersion disc 502 driven to rotate by the first drive motor 501. The bottom surface of the uniform dispersion disc 502 is provided with a uniform dispersion belt 505 that can slide back and forth. During the rotation of the uniform dispersion disc 502, the uniform dispersion belt 505 is driven to produce periodic reciprocating sliding, achieving disturbance and dispersion of the falling powder. The drive rod 509 is arranged in the sliding groove 508, and its top end is limited by the wave-shaped drive groove 510 arranged on the inner top surface, guiding the drive rod 509 to produce regular radial reciprocating motion, thereby driving the uniform dispersion belt 505 to work.The top of the spheroidization zone is also provided with airflow guiding device 6, which is driven by second driving motor 61 to adjust the angle, and the airflow pipe 63 is connected with the furnace body 11 by a ball joint, which has multiple degrees of freedom adjustment capability, and the bottom end is provided with a gas nozzle 64, which can spray directional airflow, which is used to further control the falling point and falling path of the powder, avoid concentrated impact, and improve the dispersion range of the spheroidization zone. The auxiliary gas is continuously supplied by an external gas source through an auxiliary gas pipe 66 to ensure stable airflow. The powder is gradually melted in the spheroidization zone under the influence of high temperature and airflow disturbance, and forms a spherical structure under the action of surface tension. The spheroidized material enters the lower cooling zone and rapidly solidifies under the cooling action of inert airflow, and then enters the collection zone for centralized collection, completing the entire spheroidization process.

[0059] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be made by those skilled in the art without departing from the spirit and scope of the present application.

Claims

1. A high-efficiency energy-saving powder spheroidizing furnace for producing spherical silicon fine powder, characterized by comprising: The utility model relates to a kind of air distribution devices, including: Air inlet pipe (21) is arranged in the vertical ground direction; Adjusting pipe (3) is arranged at the top of the air inlet pipe (21); Extension pipe (4) is arranged at the top of the adjusting pipe (3); The adjusting pipe (3) includes: Outer pipe (31) is connected between the air inlet pipe (21) and the extension pipe (4); Several adjusting plates (32) are arranged in the inner cavity of the outer pipe (31) in a concentric array, and the bottom end of the adjusting plate (32) is hinged to the inner wall of the bottom end of the outer pipe (31); Several first sealing members (33) are arranged between every two adjacent adjusting plates (32); Second sealing member (34) is arranged between the top end of several adjusting plates (32) and the inner wall of the top end of the outer pipe (31); Several guide mechanisms (35) are arranged on several adjusting plates (32) respectively; Air bag (36) is arranged between the adjusting plate (32) and the inner wall of the outer pipe (31); The guide mechanism (35) includes: Base ring (351) is rotatably arranged on the adjusting plate (32); Guide vane (352) is rotatably arranged in the inner cavity of the base ring (351), and the side wall of the guide vane (352) is provided with a threaded hole in the axial direction of the base ring (351); Push rod (353) is rotatably connected to the inner wall of the outer pipe (31) at one end, and the other end is screwed into the threaded hole.

2. The high-efficiency energy-saving powder spherization furnace for producing spherical silicon micro-powder according to claim 1, characterized in that: The rotatable angle of the adjusting plate (32) is between 6° and 12°.

3. The high-efficiency energy-saving powder spherization furnace for producing spherical silicon micro-powder according to claim 1, characterized in that: Several guide mechanisms (35) are arranged in the inner cavity of the outer pipe (31) in a spiral structure.

4. The high-efficiency energy-saving powder spherization furnace for producing spherical silicon micro-powder according to claim 1, characterized in that: The rotatable angle of the guide vane (352) is between 9° and 18°.

5. The high-efficiency energy-saving powder spherization furnace for producing spherical silicon micro-powder according to claim 1, characterized in that: The structure of the first sealing member (33) and the second sealing member (34) forms an elastic connection.

6. The high-efficiency energy-saving powder spherization furnace for producing spherical silicon micro-powder according to claim 1, characterized in that: The air bag (36) is in a ring structure, and is located between the inner wall of the outer pipe (31) and the outer wall of several adjusting plates (32). The air bag (36) is provided with multiple independent cavities inside, and each cavity is equipped with the same air inlet pipe (21).

7. The high-efficiency energy-saving powder spherization furnace for producing spherical silicon micro-powder according to claim 1, characterized in that: The first sealing member (33) and the second sealing member (34) adopt a multi-layer flexible structure, which can ensure the sealing effect between the adjusting plate (32) and the outer pipe (31), and the second sealing member (34) can maintain the smooth connection between the adjusting pipe (3) and the extension pipe (4).

8. The high-efficiency energy-saving powder spherization furnace for producing spherical silicon micro-powder according to claim 1, characterized in that: The bottom end of the air inlet pipe (21) is provided with a variable diameter structure, so that the air inlet pipe (21) forms a contraction section (22) near the bottom end, and a feed pipe (7) is connected to the side wall of the contraction section (22).

9. The high-efficiency energy-saving powder spherization furnace for producing spherical silicon micro-powder according to claim 1, characterized in that, The upper part of the extension pipe (4) is provided with an equalizing device (5), and the equalizing device (5) includes: First driving motor (501) is located above the extension pipe (4). A uniform distribution disc (502) is fixedly installed on the driving end output shaft of the first driving motor (501), the bottom surface of the uniform distribution disc (502) is arranged towards the discharge port, and at least one groove (503) is formed in the bottom surface of the uniform distribution disc (502), and a sliding groove (508) is formed in the inner top surface of the groove (503) along the length direction of the groove (503); A bottom plate (504) is arranged in the groove (503); A uniform distribution belt (505) is slidingly arranged on the outer wall of the bottom plate (504) and arranged in a ring shape; A first protrusion (506) is arranged on the outer surface of the uniform distribution belt (505); A second protrusion (507) is arranged on the bottom surface of the uniform distribution disc (502); A driving rod (509) is slidingly arranged in the sliding groove (508), and the bottom end of the driving rod (509) is connected with the uniform distribution belt (505); A driving groove (510) is formed in the inner top surface of the furnace body (11), and the top end of the driving rod (509) is slidingly arranged in the driving groove (510).

10. The high-efficiency energy-saving powder spherization furnace for producing spherical silicon micro-powder according to claim 9, characterized in that, An air flow guiding device (6) is arranged above the uniform distribution device (5), and the air flow guiding device (6) comprises: A second driving motor (61) is arranged above the uniform distribution device (5); A support (62) is arranged at the output end of the second driving motor (61); A plurality of air supply pipes (63) are distributed around the uniform distribution device (5); An air nozzle (64) is arranged at the bottom end of the air supply pipe (63); A connecting rod (65) is connected with the support (62) by a ball head, and the bottom end of the connecting rod (65) is slidingly connected with the top end of the air supply pipe (63); An auxiliary air pipe (66) is connected with the air supply pipe (63) at one end, and the other end of the auxiliary air pipe (66) is connected with an external air source.

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