Efficient energy-saving powder spheroidizing furnace for producing spherical silica powder

Abstract

The invention relates to an efficient energy-saving powder spheroidizing furnace for producing spherical silica powder, which comprises an air inlet pipe, an adjusting pipe and an extension pipe which are sequentially connected and are coaxially arranged along the vertical direction. A plurality of adjusting plates which are concentrically distributed in an annular array are arranged in the adjusting pipe, the bottom ends of the adjusting plates are hinged to the inner wall of the bottom of the outer pipe, the tops of the adjusting plates are connected with the adjacent adjusting plates through first sealing pieces and are in sealing fit with the top end of the outer pipe through second sealing pieces, and air bags are arranged between the adjusting plates and the outer pipe and used for driving the adjusting plates to swing synchronously. The inner diameter of the pipeline is adjusted; and the airflow velocity is controlled. Each adjusting plate is provided with a flow guide mechanism, each flow guide mechanism comprises a rotatably arranged base ring and a flow guide piece, the side wall of each flow guide piece is provided with a screw hole, the flow guide piece is connected with the inner wall of the outer pipe through a push rod, the angle of the flow guide piece is adjustable, and then the airflow rotation direction and strength are adjusted and controlled. And the uniformity and the energy efficiency of the powder spheroidizing process can be improved.

Description

Technical Field

[0001] The present invention relates to the field of high-temperature treatment equipment, and specifically to an energy-efficient powder spheroidizing furnace for producing spherical silica powder. Background Art

[0002] In the spheroidizing process of powder materials, the powder usually needs to be transported by high-speed air flow and heated and melted in a spheroidizing furnace to form particles with high sphericity. The material spraying method of traditional spheroidizing furnaces mainly relies on direct spraying by nozzles or single-stage diffusion cones, resulting in uneven distribution of the powder when entering the spheroidizing area, prone to local accumulation or over-concentration, thus affecting the spheroidizing uniformity. And due to the air flow turbulence effect, some powders may directly impact the inner wall of the furnace body, leading to material loss and reducing the yield. Summary of the Invention

[0003] The purpose of the present invention is to provide an energy-efficient powder spheroidizing furnace for producing spherical silica powder to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: An energy-efficient powder spheroidizing furnace for producing spherical silica powder, comprising:

[0005] An air inlet pipe, arranged in the vertical direction perpendicular to the ground;

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

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

[0008] The adjusting pipe includes:

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

[0010] A plurality of adjusting plates, concentrically distributed in a circular 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, inserted between every two adjacent adjusting plates;

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

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

[0014] An airbag, arranged between the adjusting plate and the inner wall of the outer pipe;

[0015] The flow guiding mechanism includes:

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

[0017] The flow guide vane is rotatably arranged in the inner cavity of the base ring. Along the axial direction of the base ring, screw holes are formed in the side wall of the flow guide vane;

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

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

[0020] Preferably, a number of flow guiding mechanisms are arranged in a spiral structure in the inner cavity of the outer tube.

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

[0022] Preferably, the structures of the first seal and the second seal form an elastic connection.

[0023] Preferably, the airbag is in an annular structure, and the airbag is located between the inner wall of the outer tube and the outer walls of a number of the adjusting plates. A plurality of independent partition chambers are arranged inside the airbag, and each partition chamber is equipped with the same air inlet pipe.

[0024] Preferably, the first seal and the second seal adopt a multi-layer flexible structure. While ensuring the sealing effect between the adjusting plate and the outer tube, the second seal can maintain the smooth connection between the adjusting tube and the extension tube.

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

[0026] Preferably, the bottom end of the air inlet pipe is provided with a diameter-changing structure, so that the air inlet pipe forms a contraction section at a position close to the bottom end, and a feed pipe is connected to the side wall of the contraction section.

[0027] An efficient and energy-saving powder spheroidizing furnace for producing spherical silica powder proposed by the present invention has the beneficial effects that: An efficient and energy-saving powder spheroidizing furnace for producing spherical silica powder provided by the present invention, through the coaxial connection structure of the air inlet pipe, the adjusting pipe and the extension pipe, ensures the stable transportation of the air flow along the central axis, improves the uniformity of the powder entering the spheroidizing area. An adjustable plate is arranged in the adjusting pipe and is driven by an airbag to adjust its angle. The inner diameter of the pipe can be adjusted according to the actual working conditions, and then the air flow speed and distribution can be regulated, improving the adaptability to powders of different particle sizes, avoiding powder aggregation. Seals are provided between the adjusting plates to ensure airtightness while allowing angle adjustment. The structure is reliable. The flow guiding mechanism arranged on the adjusting plate, including a base ring, a flow guide vane and a push rod, can adjust the swirling direction of the air flow, guide the powder to form a stable swirling flow, and improve the spheroidizing uniformity and sphericity. Description of the Drawings

[0028] Figure 1 Structural schematic diagram of the present invention;

[0029] Figure 2 Partial structural schematic diagram of the present invention;

[0030] Figure 3 Schematic diagram of the adjustment pipe of the present invention;

[0031] Figure 4 Schematic diagram of the diversion mechanism of the present invention;

[0032] Figure 5 Schematic diagram of the air flow guiding device of the present invention;

[0033] Figure 6 Schematic diagram of the uniform dispersion device of the present invention;

[0034] Figure 7 Bottom view schematic diagram of the uniform dispersion device of the present invention;

[0035] Figure 8 Partial schematic diagram of the uniform dispersion device of the present invention.

[0036] In the figure: 11, furnace body, 12, housing, 21, intake pipe, 22, contraction section, 3, adjustment pipe, 31, outer pipe, 32, adjustment plate, 33, first seal, 34, second seal, 35, diversion mechanism, 351, base ring, 352, diversion vane, 353, push rod, 36, airbag, 4, extension pipe, 5, uniform dispersion device, 501, first drive motor, 502, uniform dispersion plate, 503, groove, 504, bottom plate, 505, uniform dispersion belt, 506, first protrusion, 507, second protrusion, 508, chute, 509, drive rod, 510, drive groove, 6, air flow guiding device, 61, second drive motor, 62, bracket, 63, gas transmission pipe, 64, nozzle, 65, connecting rod, 66, auxiliary gas pipe, 7, feed pipe. Specific embodiments

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] Please refer to Figures 1 - 8 , the present invention provides a technical solution for an energy-efficient powder spheroidization furnace for producing spherical silica powder. The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process, and the specific work is as follows.

[0039] An energy-efficient powder spheroidizing furnace for producing spherical silica powder, comprising: an air inlet pipe 21, an adjusting pipe 3, an extension pipe 4, a furnace body 11, a dispersion device 5 and an air flow guiding device 6.

[0040] The air inlet pipe 21 is arranged along the direction perpendicular to the ground. The adjusting pipe 3 is arranged at the top end of the air inlet pipe 21 and is used to adjust the air flow velocity and flow field distribution entering the extension pipe 4 to ensure the uniformity and controllability of powder transportation 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 to ensure the symmetry of the entire air flow transportation channel and reduce the powder offset caused by uneven air flow. The extension pipe 4 is completely inside the furnace body 11, and a part of the adjusting pipe 3 is inside the furnace body 11. There is a gap between the top end of the extension pipe 4 and the top of the furnace body 11, which is the discharge area of the material. Through this gap, the powder can be evenly diffused under the action of the air flow to avoid powder accumulation caused by concentrated spraying. The dispersion device 5 is arranged on the inner top surface of the furnace body 11 and is on the same axis as the extension pipe 4 to ensure that the powder maintains a stable flow trajectory after entering the spheroidizing area, avoid excessive local concentration affecting the spheroidizing quality, and improve the transportation accuracy. The air flow guiding device 6 is arranged on the outer top surface of the furnace body 11, and the air outlet end of the air flow guiding device 6 extends into the inner cavity of the furnace body 11. A housing 12 is arranged outside the air flow guiding device 6 to protect the air flow guiding device 6. This device is used to provide auxiliary air flow to adjust the powder spraying path, prevent the material from directly hitting the furnace wall, improve the spheroidizing uniformity of the material. At the same time, the spheroidizing area, cooling area, material collection area, etc. in the furnace body 11 are not shown in the figure.

[0041] The adjusting pipe 3 includes: an outer pipe 31, a plurality of adjusting plates 32, a plurality of first seals 33, a second seal 34, a plurality of flow guiding mechanisms 35 and an airbag 36.

[0042] The outer tube 31 is connected between the intake pipe 21 and the extension pipe 4 to form a stable intermediate support structure, enabling the adjustment pipes 3 to be coaxially arranged in the spheroidizing furnace, improving the stability and controllability of gas flow transportation. A number of adjusting plates 32 are concentrically distributed in a circular 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, enabling the adjusting plate 32 to be adjusted symmetrically around the central axis, thereby controlling the inner diameter of the gas flow channel and ensuring the flow rate and flow field uniformity of the powder before entering the spheroidizing zone. A number of first seals 33 are inserted between every two adjacent adjusting plates 32 to ensure that the adjusting plates 32 can still maintain a good sealing effect during rotational adjustment, preventing gas leakage. The second seal 34 is arranged between the top ends of a number of adjusting plates 32 and the inner wall of the top end of the outer tube 31 to further strengthen the sealing structure, adapt to deformation when the adjusting plate 32 adjusts the angle, ensure the integrity of the gas flow path, and reduce the influence of turbulence. A number of flow guiding mechanisms 35 are respectively arranged on a number of adjusting plates 32 to make the direction of the gas flow entering the spheroidizing zone adjustable, optimize the rotational diffusion of the powder, improve the powder dispersion degree, and prevent local accumulation. The airbag 36 is arranged between the adjusting plate 32 and the inner wall of the outer tube 31 and is used to synchronously control the angle adjustment of all the adjusting plates 32.

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

[0044] The base ring 351 is rotatably arranged on the adjusting plate 32. The rotation axis of the base ring 351 is along the radial direction of the adjusting tube 3, enabling it to be adjusted synchronously when the adjusting plate 32 swings, ensuring that the angle adjustment of the flow guiding vane 352 is not restricted, improving the flexibility and controllability of gas flow guidance, and enabling the rotation of the base ring 351 to compensate for the relative position change of the adjusting plate 32 at different angles, avoiding movement restriction caused by a rigid structure. The flow guiding vane 352 is rotatably arranged in the inner cavity of the base ring 351. The rotation axis of the flow guiding vane 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 threaded hole is provided on the side wall of the flow guiding vane 352 along the axis direction of the base ring 351. One end of the push rod 353 is rotatably connected to the inner wall of the outer tube 31. 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 threaded hole. This screwed connection structure enables the angle of the flow guiding vane 352 to be adjusted by adjusting the depth of the push rod 353 in the threaded 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 enable the push rod 353 to be appropriately inclined for angle compensation when the adjusting plate 32 swings. At the same time, when the angle changes, a relative position change occurs between the push rod 353 and the flow guiding vane 352, thereby preventing the push rod 353 from restricting the free swing of the adjusting plate 32.

[0045] The dispersion device 5 includes: a first drive motor 501, a dispersion plate 502, a bottom plate 504, a dispersion belt 505, a first protrusion 506, a second protrusion 507, a drive rod 509, and a drive 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 to provide a rotational torque for the uniform dispersion structure. Its output end faces downward, and the driving device is coaxially connected to the rotating assembly to ensure stable operation. The uniform dispersion disk 502 is fixedly installed on the output shaft of the driving end of the first driving motor 501, and it is arranged to rotate horizontally as a whole. When rotating, it is used to drive the bottom uniform dispersion device 5 to realize the dynamic dispersion function. The bottom surface of the uniform dispersion disk 502 faces the discharge port, and at least one groove 503 is opened on its bottom surface for installing components such as the bottom plate 504 and the uniform dispersion belt 505 to realize the reciprocating disturbance of the uniform dispersion mechanism. A chute 508 is opened on the inner top surface of the groove 503 along its length direction. The chute 508 serves as a limiting and guiding structure for restricting the movement track of the driving rod 509 to ensure that it generates an accurate and controllable linear sliding during the rotation of the uniform dispersion disk 502.The bottom plate 504 is disposed within the groove 503. The outer peripheral surface of the bottom plate 504 is smoothly machined to install the dispersion belt 505 and provide a guiding surface for its movement. The dispersion belt 505 is slidably disposed on the outer wall of the bottom plate 504 and is arranged in a ring shape. The bottom plate 504 is disposed within the groove 503 and a gap is reserved between the bottom plate 504 and the bottom of the groove 503 to form a structure similar to a crawler belt, which can perform periodic reciprocating movement around the bottom plate 504 for disturbing, dispersing, and diffusing the powder material. The first protrusion 506 is disposed on the outer surface of the dispersion belt 505. Through the rotation of the dispersion disk 502, the first protrusion 506 generates periodic reciprocating sliding in the horizontal direction along with the dispersion belt 505 to form a dynamic disturbance track. The second protrusion 507 is disposed on the bottom surface of the dispersion disk 502. The first protrusion 506 not only rotates axially along with the dispersion disk 502 but also performs reciprocating movement on the bottom plate 504. The second protrusion 507 only rotates along with the dispersion disk 502. Due to the simultaneous presence of rotational movement and reciprocating movement, the first protrusion 506 can more comprehensively disturb and mix the powder material it contacts. The design of the reciprocating movement enables the first protrusion 506 to agitate the material within a larger range, thereby improving the uniform distribution effect of the material. The second protrusion 507 can play an auxiliary driving role and provide stable motion output during the rotation of the dispersion disk 502. The cooperative design of the first protrusion 506 and the second protrusion 507 can form a comprehensive stirring and dispersion of the material. The first protrusion 506 is responsible for disturbance and dispersion within a large range, while the second protrusion 507 supplements the stirring of the edge area during rotation. Through this structural design, the uniform distribution and diffusion of the powder material can be better achieved, and the working efficiency and stability of the device can be improved. The driving rod 509 is slidably disposed within the chute 508, and the bottom end of the driving rod 509 is connected to the dispersion belt 505. The driving groove 510 is opened on the inner top surface of the furnace body 11, and the top end of the driving rod 509 is slidably disposed within the driving groove 510. The driving groove 510 cooperates with the chute 508 to enable the driving rod 509 to achieve linear radial displacement during rotational movement, thereby driving the dispersion belt 505 to perform periodic sliding operations to form continuous and uniform dispersion disturbance of the material. The driving groove 510 is a waveform curve with periodic undulations on the plane, extending circumferentially, with the wave crest facing outward and the wave trough facing inward to achieve regular radial movement of the driving rod 509.

[0047] The air flow guiding device 6 includes: a second driving motor 61, a bracket 62, an air delivery pipe 63, an air nozzle 64, a connecting rod 65, and an auxiliary air pipe 66.

[0048] The second driving motor 61 is arranged on the outer top surface of the furnace body 11, providing active rotation or swinging power for the bracket 62, changing the inclination angle of the gas pipe 63, making the airflow direction controllable, and facilitating the adjustment of the jet angle to match the change of the material landing point. The bracket 62 is arranged at the output end of the second driving motor 61, and as a power transmission component, it rotates or swings in conjunction with the gas pipe 63 and the connecting rod 65 to support the stable operation of the entire guiding structure. The bottom end of the gas pipe 63 extends into the furnace body 11, and the gas pipe 63 is connected to the upper wall of the furnace body 11 by a ball head. The bottom end of the gas pipe 63 is provided with a gas nozzle 64, so that the jet airflow can directly act on the powder movement area inside the furnace body 11. To form precise airflow guidance, the connecting rod 65 and the bracket 62 are connected by a ball head, and the bottom end of the connecting rod 65 and the top end of the air pipe 63 are slidably connected, allowing the distance between the air nozzle 64 and the bracket 62 to change when the bracket 62 rotates or the air pipe 63 adjusts its angle. The sliding connection between the connecting rod 65 and the air pipe 63 will cooperate to change the distance between the two to achieve length compensation between the connecting rod 65 and the air pipe 63, ensuring that the entire air path is not broken or over-squeezed. One end of the auxiliary air pipe 66 is connected to the air pipe 63, and the other end of the auxiliary air pipe 66 extends out of the shell 12 and is connected to the air source to supply air to the nozzle, ensuring a continuous supply of injection gas.

[0049] The rotatable angle of the adjusting plate 32 is between 6° and 12°. By synchronously swinging the adjusting plate 32, the diameter of the adjusting tube 3 can be accurately controlled to optimize the airflow velocity and distribution. When the inner diameter is larger (the adjusting plate 32 is deflected by 6°), the airflow is unobstructed and the flow velocity can be reduced, which is suitable for the stable transportation of fine powders. When the inner diameter is smaller (the adjusting plate 32 is deflected by 12°), the airflow velocity is increased, which is conducive to the rapid suspension transportation of powders, reduces powder aggregation, adapts to the transportation requirements of powders of different particle sizes, improves the uniformity of spheroidization, optimizes the dynamic regulation of airflow, and improves energy efficiency. The synchronous swinging of the adjusting plate 32 changes the shape of the airflow channel, so that the airflow produces different swirls or directional flows, thereby affecting the flow trajectory of the powder. When the angle is small (6°), the powder movement is relatively stable, which is suitable for powders with high sphericity requirements. When the angle is large (12°), the dispersion effect of the airflow on the powder is enhanced, which is conducive to improving the distribution uniformity of fine powders, reducing powder agglomeration, improving sphericity, and ensuring that the movement trajectory of powders of different particle sizes in the spheroidizing furnace is controllable.

[0050] A plurality of guide mechanisms 35 are arranged in a spiral structure in the inner cavity of the outer tube 31, so that the airflow forms a swirl when passing through the adjustment plate 32. The angle of the spirally distributed guide plate 352 is adjustable. By adjusting different angles, the swirl intensity of the powder can be controlled. It is suitable for high-speed airflow systems, optimizes the rotational diffusion of the powder, prevents the concentrated accumulation of the powder due to the linear motion, and improves the uniformity of spheroidization.

[0051] The rotatable angle of the flow guide vane 352 is between 9° and 18°. The angle of the flow guide vane 352 between 9° and 18° ensures the uniform distribution of the powder in the air flow, prevents local accumulation, improves the sphericity. An angle that is too small (<9°) may cause the flow direction of the powder to be too parallel, affecting the diffusion effect of the powder in the spheroidization area. An angle that is too large (>18°) may cause too strong a swirl, over-dispersing the powder and affecting the heating uniformity.

[0052] The structures of the first seal 33 and the second seal 34 form an elastic connection, allowing the adjusting plate 32 to remain sealed during rotation to ensure the stability of the air flow inside the spheroidization furnace, ensure airtightness, prevent air leakage from affecting the spheroidization effect, and allow the adjusting plate 32 to move flexibly without affecting the air flow path.

[0053] The airbag 36 has an annular structure, and the airbag 36 is located between the inner wall of the outer tube 31 and the outer walls of several adjusting plates 32. Multiple independent compartments are provided inside the airbag 36, and each compartment is equipped with the same air pipe to ensure that the angles of the several adjusting plates 32 change synchronously during inflation and deflation, avoid angle errors of the adjusting plates 32 caused by uneven air pressure inside the airbag 36, ensure the consistency of the angle adjustment of all adjusting plates 32, improve the stability of powder conveying, avoid uneven adjustment of the adjusting plates 32 caused by local air pressure deviation of the airbag 36, and optimize the air flow control inside the spheroidization furnace.

[0054] The first seal 33 and the second seal 34 adopt a multi-layer flexible structure. While ensuring the sealing effect between the adjusting plate 32 and the outer tube 31, the second seal 34 can maintain a smooth connection between the adjusting tube 3 and the extension tube 4, enabling the second seal 34 to automatically deform when the adjusting plate 32 rotates to ensure a smooth transition of the air path and avoid turbulence and local air flow deviation.

[0055] The outer wall of the adjusting tube 3 is coated with heat-insulating material. The heat-insulating material adopts a flexible gradient structure at the joints with the inlet pipe 21 and the extension tube 4. Through changes in layer thickness or elastic transition, it smoothly fits the pipe wall to reduce structural deformation and air flow instability caused by sudden changes in the thermal gradient, ensure a smooth transition between the heat-insulating layer and the pipe wall, reduce turbulence, avoid heat loss at local transition points, improve the heat-insulating effect, reduce material stress caused by temperature difference, and improve the service life. The temperature at the position of the adjusting tube 3 is about 250°C to 400°C to ensure the long-term stable operation of rubber-like seals, the airbag 36, and the flexible connection structure.

[0056] The intake pipe 21 is provided with a diameter-changing section near the bottom end. The diameter-changing section is composed of a tapered section and a transition section, which causes the intake air flow velocity to change in this area. A feed pipe 7 is provided on the side wall of the diameter-changing section. The axis direction of the feed pipe 7 forms a certain angle with the axis direction of the intake pipe 21 to optimize the powder conveying effect. The diameter-changing structure is refined into a tapered section + a transition section to optimize fluidity, and it forms an angle with the axis of the intake pipe 21, rather than being perpendicular, to improve the powder conveying uniformity.

[0057] Working principle:

[0058] High-temperature inert gas from the gas source enters the spheroidizing furnace vertically through the inlet pipe 21 arranged at the bottom of the furnace body 11. A reduced-diameter section is provided near the bottom end of the inlet pipe 21, where the air flow accelerates, forming a negative pressure attraction force that drives the powder to enter the air flow channel through the feed pipe 7 arranged on the side wall of the reduced-diameter section. Since the feed pipe 7 is connected to the inlet pipe 21 at a certain angle, the powder can be smoothly introduced into the system along the air flow direction, avoiding backflow or blockage and ensuring the uniformity of transportation. After the air flow is mixed with the powder, it rises successively through the regulating pipe 3 and the extension pipe 4 to complete the transportation to the spheroidizing area. During this process, the regulating pipe 3 adjusts its inner diameter through a plurality of annularly distributed regulating plates 32 to adapt to the air flow velocity required for powders of different particle sizes. The swing of each regulating plate 32 is driven by an airbag 36. The airbag 36 is provided with a plurality of partition chambers, and the synchronous angle control of the plurality of regulating plates 32 is realized through uniform air supply. When the through diameter is small, the air flow accelerates, which is beneficial to the suspension of large-particle powders; when the through diameter is large, the air flow decelerates, which is suitable for the transportation of fine powders, so as to adapt to the spheroidizing requirements of different powders. A first seal 33 is provided between the regulating plates 32, and a second seal 34 is provided between the top of the regulating plate 32 and the outer pipe 31. The two form an elastic sealing structure that can automatically deform when the regulating plate 32 swings to maintain airtightness, avoid gas leakage, and ensure the stability of the air flow. A flow guiding mechanism 35 is also integrated on the regulating plate 32. The flow guiding mechanism 35 is composed of a rotatable base ring 351, flow guiding vanes 352, and a push rod 353. When the angle of the regulating plate 32 changes, the distance between the regulating plate 32 and the inner wall of the outer pipe 31 changes, and the depth of the push rod 353 entering the screw hole changes synchronously. Using the screw connection relationship between the push rod 353 and the screw hole, the angle of the flow guiding vanes 352 can be adjusted to guide the air flow to form a controllable swirl. This swirl structure can effectively improve the dispersion degree of the powder, prevent the powder from flowing linearly and concentrating during the rising process, and enhance the pre-dispersion effect before spheroidization. The air flow and powder mixture continue to rise along the extension pipe 4 to its top end and are discharged through the gap between the top of the extension pipe 4 and the top wall of the furnace body 11 into the spheroidizing area. To prevent the powder from directly hitting the furnace wall and affecting the spheroidizing quality, a dispersion device 5 is arranged in the furnace body 11. The dispersion device 5 is composed of a dispersion plate 502 driven by a first driving motor 501 to rotate. A reciprocatingly slidable dispersion belt 505 is provided on its bottom surface. During the rotation of the dispersion plate 502, the dispersion belt 505 is driven to generate periodic reciprocating sliding to realize the disturbance and dispersion of the falling powder. The driving rod 509 is arranged in the chute 508, and its top end is limited by a waveform driving groove 510 provided on the inner top surface to guide the driving rod 509 to generate regular radial reciprocating motion during rotation, thereby driving the dispersion belt 505 to work.An air flow guiding device 6 is also provided at the top of the spheroidization zone. The second driving motor 61 drives the gas delivery pipe 63 to achieve angle adjustment. The connection between the gas delivery pipe 63 and the furnace body 11 is a ball joint, which has the ability to adjust in multiple degrees of freedom. A gas nozzle 64 is provided at its bottom end, which can eject a directional air flow to further control the powder landing point and the falling path, avoid concentrated impact, and increase the dispersion range of the spheroidization zone. The auxiliary gas is continuously supplied by an external gas source through the auxiliary gas pipe 66 to ensure stable air flow. The powder is affected by high temperature and air flow disturbance in the spheroidization zone, gradually melts, and forms a spherical structure under the action of surface tension. The spheroidized material enters the lower cooling zone, rapidly solidifies under the cooling effect of the inert air flow, and then enters the collection zone for centralized collection, completing the entire spheroidization process.

[0059] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy-efficient powder spheroidization furnace for producing spherical silica powder, characterized in that Including: An intake pipe (21), arranged in the direction perpendicular to the ground; An adjustment pipe (3), arranged at the top end of the intake pipe (21); An extension pipe (4), arranged at the top end of the adjustment pipe (3); The adjustment pipe (3) includes: An outer pipe (31), connected between the intake pipe (21) and the extension pipe (4); A plurality of adjustment plates (32), concentrically distributed in an annular array in the inner cavity of the outer pipe (31), and the bottom end of the adjustment plate (32) is hinged to the inner wall of the bottom end of the outer pipe (31); A plurality of first seals (33), inserted between every two adjacent adjustment plates (32); A second seal (34), arranged between the top ends of the plurality of adjustment plates (32) and the inner wall of the top end of the outer pipe (31); A plurality of flow guiding mechanisms (35), respectively arranged on the plurality of adjustment plates (32); An airbag (36), arranged between the adjustment plate (32) and the inner wall of the outer pipe (31); The flow guiding mechanism (35) includes: A base ring (351), rotatably arranged on the adjustment plate (32); A flow guiding vane (352), rotatably arranged in the inner cavity of the base ring (351), and in the axial direction of the base ring (351), a threaded hole is formed on the side wall of the flow guiding vane (352); A push rod (353), one end of the push rod (353) is rotatably connected to the inner wall of the outer pipe (31), and the other end of the push rod is screwed into the threaded hole.

2. The high-efficiency and energy-saving powder spheroidization furnace for producing spherical silica powder according to claim 1, wherein: The rotatable angle of the adjustment plate (32) is between 6° and 12°.

3. The high-efficiency and energy-saving powder spheroidization furnace for producing spherical silica powder according to claim 1, wherein: A plurality of flow guiding mechanisms (35) are arranged in a spiral structure in the inner cavity of the outer pipe (31).

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

5. The high-efficiency and energy-saving powder spheroidization furnace for producing spherical silica powder according to claim 1, wherein: The structures of the first seal (33) and the second seal (34) form an elastic connection.

6. The high-efficiency and energy-saving powder spheroidizing furnace for producing spherical silica powder according to claim 1, characterized in that: The airbag (36) is in an annular structure, and the airbag (36) is located between the inner wall of the outer pipe (31) and the outer walls of the plurality of adjustment plates (32), and a plurality of independent partition chambers are arranged inside the airbag (36), and each partition chamber is equipped with the same intake pipe (21).

7. The high-efficiency and energy-saving powder spheroidization furnace for producing spherical silica powder according to claim 1, wherein: The first seal (33) and the second seal (34) adopt a multi-layer flexible structure, while ensuring the sealing effect between the adjustment plate (32) and the outer pipe (31), the second seal (34) can maintain the smooth connection between the adjustment pipe (3) and the extension pipe (4).

8. An energy-efficient powder spheroidization furnace for producing spherical silica powder according to claim 1, characterized in that: The bottom end of the intake pipe (21) is provided with a diameter-changing structure, so that the intake pipe (21) forms a contraction section (22) at a position close to the bottom end, and a feed pipe (7) is connected to the side wall of the contraction section (22).

9. An energy-efficient powder spheroidizing furnace for producing spherical silica powder according to claim 1, characterized in that, A uniform dispersion device (5) is arranged above the extension pipe (4), and the uniform dispersion device (5) includes: A first driving motor (501), located above the extension pipe (4); The dispersion plate (502) is fixedly installed on the output shaft of the driving end of the first driving motor (501). The bottom surface of the dispersion plate (502) faces the discharge port, and at least one groove (503) is formed on its bottom surface. A sliding groove (508) is formed on the inner top surface of the groove (503) along its length direction; The bottom plate (504) is arranged in the groove (503); The dispersion belt (505) is slidably arranged on the outer wall of the bottom plate (504) and is arranged in a ring shape; The first protrusion (506) is arranged on the outer surface of the dispersion belt (505); The second protrusion (507) is arranged on the bottom surface of the dispersion plate (502); The driving rod (509) is slidably arranged in the sliding groove (508), and the bottom end of the driving rod (509) is connected to the dispersion belt (505); The driving groove (510) is formed on the inner top surface of the furnace body (11), and the top end of the driving rod (509) is slidably arranged in the driving groove (510).

10. The high-efficiency and energy-saving powder spheroidization furnace for producing spherical silica powder according to claim 9, wherein, An air flow guiding device (6) is arranged above the dispersion device (5). The air flow guiding device (6) includes: The second driving motor (61) is located above the dispersion device (5); The bracket (62) is arranged at the output end of the second driving motor (61); A plurality of air delivery pipes (63) are distributed around the dispersion device (5); The air nozzle (64) is arranged at the bottom end of the air delivery pipe (63); The connecting rod (65) is connected to the bracket (62) by a ball joint, and the bottom end of the connecting rod (65) is slidably connected to the top end of the air delivery pipe (63); The auxiliary air pipe (66), one end of the auxiliary air pipe (66) is connected to the air delivery pipe (63), and the other end of the auxiliary air pipe (66) is connected to an external air source.

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