Silicon dioxide powder spheroidizing furnace with preheating structure

Abstract

The invention relates to the technical field of spheroidizing furnaces, in particular to a silicon dioxide powder spheroidizing furnace with a preheating structure. Comprising a frame body; the furnace body is fixedly connected to the frame body; the first pipe is fixedly connected to the upper part in the furnace body and is used for guiding the flow of the material and preheating the passing material at the same time; the heating mechanism is arranged in the furnace body and is used for heating materials; the discharging mechanism is arranged at the upper part in the furnace body and is used for guiding materials; the preheating mechanism is arranged at the upper part in the furnace body and is used for preheating materials; and the cooling mechanism is arranged at the lower part in the furnace body and is used for cooling and shaping the heated materials. The temperature of the silicon dioxide powder is increased through waste heat generated in the spheroidizing process before the silicon dioxide powder is molten, heat needed in the subsequent spheroidizing process is reduced, and therefore energy consumption is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of spheroidizing furnaces, and in particular to a silicon dioxide powder spheroidizing furnace with a preheating structure. Background Art

[0002] Silica is an important inorganic non-metallic material with the advantages of high hardness and good heat resistance. Silica powder is widely used in coatings, plastics, rubbers, ceramics and other fields as a filler or additive. Since the silica powder produced by grinding is usually irregular in shape, has problems such as uneven particle size distribution and poor fluidity, it is necessary to spheroidize the silica powder to improve the physical properties of silica such as fluidity, dispersibility and filling, thereby improving the application effect.

[0003] Existing spheroidization technology usually uses a flame spheroidization method, which is to send silica powder into a high-temperature field generated by fuel gas and oxygen, first melt it at high temperature and then cool it into balls. Since this method involves combustion, high-temperature exhaust gas will be generated. The existing technology is relatively lacking in the use of this part of energy, and it is difficult to fully and evenly preheat the silica powder, which leads to energy waste and increases the cost of the silica spheroidization process. Summary of the invention

[0004] In order to overcome the shortcomings mentioned in the above technical background, the present invention provides a silicon dioxide powder spheroidizing furnace with a preheating structure.

[0005] The technical implementation scheme of the present invention is: a silicon dioxide powder spheroidizing furnace with a preheating structure, including the frame; a furnace body, fixedly connected to the frame; a first pipe, fixedly connected to the upper part of the furnace body, used to guide the material and preheat the passing material; also includes: a heating mechanism, arranged in the furnace body, used to heat the material; a feeding mechanism, arranged in the upper part of the furnace body, used to guide the material; a preheating mechanism, arranged in the upper part of the furnace body, used to preheat the material; a cooling mechanism, arranged in the lower part of the furnace body, used to cool and shape the heated material.

[0006] Preferably, the heating mechanism includes: a connecting ring, which is arranged in the furnace body; a first external tube, which is fixedly connected to the furnace body; an intermediate ring, which is fixedly connected to the furnace body, and the first external tube is connected to the intermediate ring; a connecting piece, which is arranged on the intermediate ring, and the connecting piece is equipped with a lance, and the lance is fixedly connected to the connecting ring.

[0007] Preferably, the unloading mechanism includes: a blocking plate fixedly connected to the first tube, used to block the material to slow down the moving material; a fixed frame fixedly connected to the furnace body; a conical shell fixedly connected to the fixed frame, and the conical shell is provided with a through hole.

[0008] Preferably, the preheating mechanism includes: a connecting sleeve, which is arranged on the upper side of the conical shell; a second tube, which is arranged on the connecting sleeve; an intermediate shell, which is arranged on the upper part of the furnace body, and the intermediate shell is provided with a through groove; there are a plurality of connecting tubes, and the plurality of connecting tubes are fixed and connected between the intermediate shell and the second tube, and the upper part of the furnace body is fixedly connected with a second external tube, and the second external tube is connected with the through groove on the intermediate shell; a guide member, which is fixedly connected to the upper part of the second tube and is used to guide the passing material.

[0009] Preferably, the first tube and the second tube both have a wave-shaped area for guiding the passing material and causing the material to tumble.

[0010] Preferably, the cooling mechanism comprises: an air cooler installed on the frame; an air separation shell fixedly connected to the furnace body, and the air separation shell is connected to the air outlet of the air cooler, and the air separation shell is provided with an air outlet.

[0011] Preferably, it also includes: a power mechanism, which is arranged on the frame, the connecting ring is rotatably connected to the furnace body, the connecting piece is rotatably connected to the intermediate ring, the connecting sleeve and the connecting ring are both rotatably connected to the conical shell, and the power mechanism is used to make the connecting ring and the furnace body rotate relative to each other, and the power mechanism includes: a driving motor, which is installed on the frame, and the output shaft of the driving motor is fixedly connected with a gear; a ring gear, which is fixedly connected to the connecting ring, and the ring gear is meshed with the gear; an arc rod, which is fixedly connected to the ring gear, the arc rod is fixedly connected to the connecting sleeve, and the arc rod is in contact with the conical shell; a limiting assembly, which is arranged at the upper part of the furnace body, and is used to make the connecting sleeve and the second tube slide relative to each other.

[0012] Preferably, it also includes: an intermediate net, fixedly connected to the connecting ring, for crushing the passing materials.

[0013] Preferably, the limiting assembly includes: a material dividing piece, fixedly connected to the upper side of the second tube, the second tube is splined to the connecting sleeve, and the intermediate shell is slidably and rotatably connected to the furnace body; a limiting rod, fixedly connected to the material dividing piece, a limiting groove is provided in the upper part of the furnace body, the limiting groove is limitedly matched with the limiting rod, and the limiting groove is an annular closed wave shape, which is used to enable relative movement between the material dividing piece and the furnace body.

[0014] Preferably, the material dividing piece is a cone, and its cone faces upward, the upper side surface of the intermediate shell, the upper side surface of the guide piece and the upper side surface of the first tube are all inclined surfaces, and the material dividing piece, the intermediate shell, the guide piece and the first tube are arranged in sequence from top to bottom for guiding the passing material.

[0015] Compared with the prior art, the present invention has the following advantages: 1. By using the waste heat generated during the spheroidization process to raise the temperature of the silicon dioxide powder before melting, the heat required for subsequent spheroidization is reduced, thereby reducing energy consumption; 2. Use an inclined fire gun to exert an upward force on the material to resist gravity, extend the speed of the silica powder moving downward, and make the silica powder fully heated and melted, thereby improving the spheroidization effect of the silica powder; 3. The silicon dioxide powder moving from top to bottom in the first tube is blocked by the blocking plate to reduce the speed of the silicon dioxide falling downwards and prevent the high-speed silicon dioxide powder from splashing when it contacts the parts below, thereby causing uneven distribution of the silicon dioxide powder; 4. Use the wavy first tube and the second tube to guide the material and make it tumble, so that the material is evenly in contact with the outer wall of the second tube, and then the material is evenly preheated, thereby reducing the time for subsequent melting of the material and improving the spheroidization efficiency of the material; 5. The second tube that moves up and down squeezes and crushes the material and increases its movement diversity, thereby improving the uniformity of the material during the spheroidization process and further improving the spheroidization effect; 6. The inclined surfaces on the material dividing piece, the intermediate shell, the guide piece and the first tube are used to guide the material, so that the material is repeatedly dispersed and gathered in the process of transferring to the spheroidizing area, so that the material is dispersed more evenly, so that it can be uniformly heated later, thereby improving the spheroidizing effect of the silica powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of the furnace body and parts thereon of the present invention; Figure 3 It is a three-dimensional structural cross-sectional view of the furnace body and its upper parts of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure when the first tube and the second tube of the present invention undergo relative motion; Figure 5 It is a three-dimensional structural exploded diagram of the connecting ring and the parts thereon of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure when the intermediate shell and the furnace body of the present invention slide relative to each other; Figure 7 It is a three-dimensional structural cross-sectional view of the furnace body of the present invention and the features thereon.

[0017] The meaning of the reference numerals in the figure are as follows: 1: frame, 2: furnace body, 301: connecting ring, 302: first external tube, 303: intermediate ring, 304: connecting piece, 305: musket, 401: first tube, 402: blocking plate, 403: fixing frame, 404: conical shell, 405: through hole, 501: connecting sleeve, 502: second tube, 503: intermediate shell, 504: connecting tube, 505: second external tube, 506: guide piece, 601: air cooler, 602: air distribution shell, 603: air outlet, 701: driving motor, 702: gear, 703: gear ring, 704: arc rod, 8: intermediate net, 901: material distribution piece, 902: limiting rod, 903: limiting groove. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0019] like Figure 1-Figure 3 As shown, an embodiment of the present invention is proposed, which provides a silica powder spheroidizing furnace with a preheating structure for spheroidizing silica, including a frame 1, a furnace 2 and a heating mechanism, including a frame 1; a furnace 2, fixedly connected to the frame 1; a first tube 401, fixedly connected to the upper part of the furnace 2, for guiding the silica powder and preheating the passing silica powder; also includes: a heating mechanism, arranged in the furnace 2, for heating the material; a feeding mechanism, arranged in the upper part of the furnace 2, for guiding the material; a preheating mechanism, arranged in the upper part of the furnace 2, for preheating the material; a cooling mechanism, arranged in the lower part of the furnace 2, for cooling and shaping the heated material.

[0020] In the above scheme, the problem of uneven preheating of silica powder during the spheroidization process in the prior art is solved, so as to improve the spheroidization quality of silica. In the present embodiment, a silica powder spheroidization furnace with a preheating structure is provided, wherein the frame 1 is a high-strength steel structure, which is used to provide sufficient support for the entire device and ensure the stability of the device during operation, thereby improving the spheroidization effect of the silica powder; the furnace body 2 is located at a higher position on the frame 1, so that the silica powder moves from top to bottom in the furnace body 2, and the upper and lower sides of the furnace body 2 are respectively provided with a feed port and a discharge port, the feed port is connected to an external silica powder conveying device, and the discharge port is connected to an external collection device, and a solenoid valve for changing the connection relationship between the two is installed at the connection point; the heating mechanism is used to make the silica in a molten state for subsequent spheroidization, and the silica is preheated by the preheating mechanism, so that the silica powder uses the waste heat generated in the spheroidization process to increase its own temperature before melting, thereby reducing the heat required for subsequent spheroidization, thereby reducing energy consumption.

[0021] like Figure 2-Figure 5 As shown, the heating mechanism includes: a connecting ring 301, which is arranged in the furnace body 2; a first external tube 302, which is fixedly connected to the furnace body 2; an intermediate ring 303, which is fixedly connected to the furnace body 2, and the first external tube 302 is connected to the intermediate ring 303; a connecting member 304, which is arranged on the intermediate ring 303, and the connecting member 304 is equipped with a lance 305, and the lance 305 is fixedly connected to the connecting ring 301.

[0022] In the above scheme, external natural gas is introduced into the middle ring 303 through the first external pipe 302; the connecting piece 304 is equipped with a plurality of lances 305 in a circular array to improve the heating efficiency of the silica powder, and the opposite sides of the plurality of lances 305 are tilted upward, so that when the natural gas is introduced into the lances 305 and ignited, the flame obtained is tilted upward, thereby exerting an upward force on the silica powder in the adjacent area, thereby resisting gravity, extending the speed at which the silica powder moves downward, and allowing the silica powder to be fully heated and melted, thereby improving the effect of spheroidization of the silica powder.

[0023] like Figure 2-Figure 5 As shown, the unloading mechanism includes: a blocking plate 402, fixedly connected to the first tube 401; a fixing frame 403, fixedly connected to the furnace body 2, used to block the silicon dioxide powder to slow down the moving silicon dioxide powder; a conical shell 404, fixedly connected to the fixing frame 403, and the conical shell 404 is provided with a through hole 405.

[0024] In the above scheme, the first tube 401 is located below the feed port of the furnace body 2, and is used to receive the silica powder flowing down from the feed port; there are a plurality of baffle plates 402 that are placed obliquely, and the baffle plates 402 are arranged in a ring array, and are used to block the silica powder moving from top to bottom in the first tube 401, so as to reduce the speed at which the silica falls downward, and prevent the high-speed moving silica powder from splashing when it contacts the parts below, thereby causing the silica powder to be unevenly distributed; the cone-shaped shell 404 is tapered upward, and is used to guide and distribute the silica powder that falls thereon; the cone-shaped shell 404 is provided with a plurality of evenly arranged through holes 405, which are used to allow the silica powder in adjacent areas to continue to move downward after passing through, and to improve the dispersion degree of the silica powder in the subsequent heat melting process, improve the heating uniformity of the silica, and thereby improve the spheroidization effect of the silica powder.

[0025] like Figure 2-Figure 4 and Figure 6 As shown, the preheating mechanism includes: a connecting sleeve 501, which is arranged on the upper side of the conical shell 404; a second tube 502, which is arranged on the connecting sleeve 501, and the first tube 401 and the second tube 502 both have a wavy area for guiding the passing material and causing the material to roll; an intermediate shell 503, which is arranged on the upper part of the furnace body 2, and the intermediate shell 503 is provided with a through groove; there are a plurality of connecting tubes 504, and the plurality of connecting tubes 504 are fixed and connected between the intermediate shell 503 and the second tube 502, and the upper part of the furnace body 2 is fixedly connected with a second external tube 505, and the second external tube 505 is connected with the through groove on the intermediate shell 503; a guide member 506, which is fixedly connected to the upper part of the second tube 502, and is used for guiding the passing silicon dioxide.

[0026] In the above scheme, during the movement of the silica powder from top to bottom between the first tube 401 and the second tube 502, the silica powder moves along the adjacent wave area. When the silica powder moves downward to the corner of the wave area, the silica powder will be blocked, thereby generating a vortex there, so that the silica powder rolls, and the silica powder is evenly in contact with the outer wall of the second tube 502, thereby uniformly preheating the silica powder, thereby reducing the time required for subsequent melting of the silica powder and improving the spheroidization efficiency of the silica powder. The connecting tube 504 has a number of annular arrays. When the silica powder moves downward to contact the connecting tube 504, the connecting tube 504 will block the silica powder, thereby breaking up the agglomerated silica powder and improving the dispersibility of the silica powder to ensure the uniformity of the subsequent spheroidization of the silica powder. The second external tube 505 is connected to the external waste gas treatment device to treat the waste gas generated during the spheroidization process.

[0027] like Figure 3 and Figure 4 As shown, the cooling mechanism includes: an air cooler 601, which is installed on the frame 1; an air separator shell 602, which is fixedly connected to the furnace body 2, and the air separator shell 602 is connected to the air outlet of the air cooler 601 through an intermediate pipe, and the air separator shell 602 is provided with an air outlet 603.

[0028] In the above scheme, the air cooler 601 is used to blow cold air into the furnace body 2, thereby cooling the silica powder in a molten state; the gas separation shell 602 is provided with a plurality of evenly arranged air outlet holes 603, and the cold air coming out of the air outlet holes 603 and the silica powder passing through the gas separation shell 602 are cooled, thereby solidifying the silica powder into a sphere.

[0029] Working process: Silica powder enters from the feed port on the furnace body 2, then enters the space between the first tube 401 and the second tube 502 and continues to move downward. During the process, the silica powder repeatedly rolls along the wave area and uniformly contacts the outer wall of the second tube 502. Then the silica powder moves downward until it contacts the blocking plate 402. The blocking plate 402 blocks the silica powder and reduces the movement speed of the silica powder. Then the silica powder falls downward to the upper side of the conical shell 404. Under the action of its own gravity, the silica powder begins to move downward along the upper side of the conical shell 404, and continues to move downward after passing through the through hole 405 until the silica powder moves downward and contacts the flame (burning natural gas) ejected from the blaster 305. Then, under the action of the flame, the silica powder gradually becomes a molten state. After the silica powder passes through the flame area and contacts the cold air, the molten silica powder solidifies again and completes spheroidization.

[0030] During the process of the lance 305 spraying flames, the high-temperature exhaust gas generated by the combustion moves upward, and after being gathered through the conical shell 404, enters the second tube 502. The exhaust gas transfers heat to the second tube 502, and the temperature of the second tube 502 begins to rise. The second tube 502 then transfers the heat to the silica powder in contact with it, so that the silica powder is preheated.

[0031] Further, such as Figure 3-Figure 5As shown, it also includes: a power mechanism, which is arranged on the frame 1, the connecting ring 301 is rotatably connected to the furnace body 2, the connecting piece 304 is rotatably connected to the intermediate ring 303, the connecting sleeve 501 and the connecting ring 301 are both rotatably connected to the conical shell 404, and the power mechanism is used to make the connecting ring 301 and the furnace body 2 rotate relative to each other, and the power mechanism includes: a driving motor 701, which is installed on the frame 1, and the output shaft of the driving motor 701 is fixedly connected to the gear 702; the gear ring 703 is fixedly connected The connecting ring 301 is connected to the connecting ring 301, and the gear ring 703 is meshed with the gear 702; the arc rod 704 is fixedly connected to the gear ring 703, the arc rod 704 is fixedly connected to the connecting sleeve 501, and the arc rod 704 is in contact with the conical shell 404; the limiting component is arranged at the upper part of the furnace body 2, and the limiting component is used to make the connecting sleeve 501 and the second tube 502 slide relative to each other, and also includes: the middle net 8 is fixedly connected to the connecting ring 301, and is used to crush the agglomerated silicon dioxide powder.

[0032] In the above scheme, it is ensured that the silica powder can be evenly dispersed during the spheroidization process, so as to improve the spheroidization quality of the silica. Specifically, the connecting ring 301 drives a plurality of lances 305 to rotate together, so that the flames generated by the lances 305 are evenly distributed in the furnace body 2, and then the silica powder is evenly heated, so that the silica powder undergoes the same degree of temperature change, and the uniformity of the melting state of the silica powder is improved, thereby improving the spheroidization effect of the silica powder. The arc rod 704 has a plurality of annular arrays for comprehensively pushing the silica powder. The arc rod 704 is in contact with the conical shell 404, and the gear ring 703 drives a plurality of arc rods 704 to rotate together, so that the arc rod 704 and the conical shell 404 slides relatively, so that the arc rod 704 pushes the silica powder on the upper side of the conical shell 404, so that the silica powder passes evenly through the through hole 405, thereby improving the uniformity of the subsequent contact between the silica powder and the flame, and then improving the spheroidization quality of the silica powder. During the process, the arc rod 704 drives the connecting sleeve 501 to rotate together; the aperture size and arrangement of the middle net 8 can be changed accordingly according to actual conditions to improve the treatment effect of the silica powder. The middle net 8 is used to "cut" the silica powder passing through. When the silica powder moves downward through the middle net 8, the middle net 8 will break and disperse the agglomerated silica powder, thereby improving the uniformity of the spheroidization of the silica powder.

[0033] like Figure 3 , Figure 6 and Figure 7As shown, the limiting assembly includes: a material dividing piece 901, which is fixedly connected to the upper side of the second tube 502, the second tube 502 is spline-connected to the connecting sleeve 501, and the intermediate shell 503 is slidably and rotatably connected to the furnace body 2; a limiting rod 902, which is fixedly connected to the material dividing piece 901, and a limiting groove 903 is arranged on the upper part of the furnace body 2, and the limiting groove 903 is limitedly matched with the limiting rod 902, and the limiting groove 903 is an annular closed wave shape, which is used to enable relative movement between the material dividing piece 901 and the furnace body 2, the material dividing piece 901 is a cone, and its cone faces upward, the upper side surface of the intermediate shell 503, the upper side surface of the guide piece 506 and the upper side surface of the first tube 401 are all inclined surfaces, and the material dividing piece 901, the intermediate shell 503, the guide piece 506 and the first tube 401 are arranged in sequence from top to bottom, which are used to guide the passing materials.

[0034] In the above scheme, the rotating connecting sleeve 501 drives the second tube 502 to rotate together, so that the silicon dioxide powder is in uniform contact with the second tube 502, thereby improving the preheating effect of the silicon dioxide powder. The rotating second tube 502 drives the limiting rod 902 to rotate together, and the limiting rod 902 begins to slide in the limiting groove 903. The limiting rod 902 begins to move up and down under the action of the limiting groove 903. The limiting rod 902 drives the second tube 502 to move up and down together through the material dividing piece 901. The wave area on the second tube 502 and the wave area on the first tube 401 are intertwined with each other, thereby squeezing the silicon dioxide powder and increasing its movement diversity. The guide piece 506 is set There are notches in a circular array for impact crushing the silica powder to improve the dispersibility of the silica powder. When the silica powder entering the furnace body 2 moves downward to contact the inclined surface on the dividing piece 901, the dividing piece 901 disperses the silica powder to the surroundings. After the silica powder leaves the dividing piece 901, it contacts the inclined surface on the intermediate shell 503 to gather, and then contacts the inclined surface on the guide piece 506 and the inclined surface on the first tube 401 in the same way, so as to increase the movement diversity of the silica powder and make it more evenly dispersed, so as to be evenly heated later, thereby improving the spheroidization effect of the silica powder.

[0035] Working process: After the silica powder enters the furnace body 2, the silica powder passes through the dividing piece 901, the intermediate shell 503, the guide piece 506 and the first tube 401 in sequence, and becomes dispersed after being guided and impacted by the above inclined surfaces, and then the silica powder enters the space between the second tube 502 and the first tube 401. During the process, the rotating limit rod 902 begins to move back and forth up and down under the action of the limit groove 903, and also begins to move up and down through the second tube 502. The wave areas on the second tube 502 and the first tube 401 are staggered and the silica powder is squeezed and crushed, so as to improve the dispersibility of the silica powder, and then the uniformity of the subsequent heating of the silica powder, thereby improving the quality of the spheroidization of the silica powder.

[0036] As the silica powder continues to move downward in the space between the second tube 502 and the first tube 401, when the silica powder moves downward and falls to the upper side of the conical shell 404, the rotating arc rod 704 moves the silica powder, so that the silica powder passes through the through hole 405 and continues to move downward, and then the middle net 8 crushes the silica powder passing through, further improving the uniformity of the spheroidization of the silica powder. After the spheroidization of the silica powder is completed, the solenoid valve is started to discharge the silica powder accumulated in the furnace body 2.

[0037] The above description is only an example of the present invention and is not intended to limit the present invention. Any equivalent substitutions made within the principles of the present invention should be included in the protection scope of the present invention. The contents not elaborated in detail in the present invention belong to the existing technologies known to those skilled in the art.

Claims

1. A silicon dioxide powder spheroidizing furnace with a preheating structure, characterized in that: It comprises a frame (1); a furnace body (2) fixedly connected to the frame (1); A first pipe (401) is fixedly connected to the upper part of the furnace body (2) and is used to guide the material and preheat the passing material; Also included are: A heating mechanism, disposed in the furnace body (2), for heating the material; A material discharge mechanism, arranged at the upper part of the furnace body (2) and used for guiding the material; A preheating mechanism, arranged at the upper part of the furnace body (2), and used for preheating the material; The cooling mechanism is arranged at the lower part of the furnace body (2) and is used to cool and shape the heated material.

2. The silicon dioxide powder spheroidizing furnace with a preheating structure according to claim 1, characterized in that: The heating mechanism comprises: A connecting ring (301) is arranged in the furnace body (2); A first external pipe (302) fixedly connected to the furnace body (2); An intermediate ring (303) is fixedly connected to the furnace body (2), and the first external pipe (302) is in communication with the intermediate ring (303); A connecting piece (304) is arranged on the intermediate ring (303), and a musket (305) is installed on the connecting piece (304), and the musket (305) is fixedly connected to the connecting ring (301).

3. The silicon dioxide powder spheroidizing furnace with a preheating structure according to claim 2, characterized in that: The unloading mechanism comprises: A blocking plate (402) is fixedly connected to the first tube (401) and is used to block the material so as to slow down the moving material; A fixed frame (403) fixedly connected to the furnace body (2); The conical shell (404) is fixedly connected to the fixing frame (403), and the conical shell (404) is provided with a through hole (405).

4. The silicon dioxide powder spheroidizing furnace with a preheating structure according to claim 3, characterized in that: The preheating mechanism comprises: A connecting sleeve (501) is arranged on the upper side of the conical shell (404); A second tube (502), arranged on the connecting sleeve (501); An intermediate shell (503) is arranged at an upper portion of the furnace body (2), and the intermediate shell (503) is provided with a through groove; There are a plurality of connecting pipes (504), each of which is fixed and connected between the intermediate shell (503) and the second tube (502); a second external pipe (505) is fixedly connected to the upper part of the furnace body (2); and the second external pipe (505) is connected to a through groove on the intermediate shell (503); The guide member (506) is fixedly connected to the upper portion of the second tube (502) and is used to guide the passing material.

5. The silicon dioxide powder spheroidizing furnace with a preheating structure according to claim 4, characterized in that: The first tube (401) and the second tube (502) both have a wave-shaped region for guiding the passing material and causing the material to tumble.

6. The silicon dioxide powder spheroidizing furnace with a preheating structure according to claim 5, characterized in that: The cooling mechanism comprises: A cooling fan (601) is installed on the frame (1); The air separation shell (602) is fixedly connected to the furnace body (2), and the air separation shell (602) is connected to the air outlet of the cooling fan (601), and the air separation shell (602) is provided with an air outlet hole (603).

7. The silicon dioxide powder spheroidizing furnace with a preheating structure according to claim 6, characterized in that: Also included are: A power mechanism is arranged on the frame (1), the connecting ring (301) is rotatably connected to the furnace body (2), the connecting piece (304) is rotatably connected to the intermediate ring (303), the connecting sleeve (501) and the connecting ring (301) are both rotatably connected to the conical shell (404), and the power mechanism is used to make the connecting ring (301) and the furnace body (2) rotate relative to each other, and the power mechanism comprises: A driving motor (701) is mounted on the frame (1), and an output shaft of the driving motor (701) is fixedly connected to a gear (702); A gear ring (703) is fixedly connected to the connecting ring (301), and the gear ring (703) is meshed with the gear (702); An arc-shaped rod (704) is fixedly connected to the gear ring (703), the arc-shaped rod (704) is fixedly connected to the connecting sleeve (501), and the arc-shaped rod (704) is in contact with and fits the conical shell (404); A limiting assembly is arranged at the upper part of the furnace body (2) and is used to enable the connecting sleeve (501) and the second tube (502) to slide relative to each other.

8. The silicon dioxide powder spheroidizing furnace with a preheating structure according to claim 7, characterized in that: Also included are: The middle net (8) is fixedly connected to the connecting ring (301) and is used to crush the passing materials.

9. The silicon dioxide powder spheroidizing furnace with a preheating structure according to claim 8, characterized in that: The limit assembly includes: The material dividing member (901) is fixedly connected to the upper side of the second tube (502); the second tube (502) is spline-connected to the connecting sleeve (501); and the intermediate shell (503) is slidably and rotatably connected to the furnace body (2); A limiting rod (902) is fixedly connected to the material dividing piece (901); a limiting groove (903) is provided at the upper part of the furnace body (2); the limiting groove (903) and the limiting rod (902) are limitedly matched, and the limiting groove (903) is an annular closed wave shape, and is used to enable relative movement between the material dividing piece (901) and the furnace body (2).

10. The silicon dioxide powder spheroidizing furnace with a preheating structure according to claim 9, characterized in that: The material dividing member (901) is a cone, and its cone faces upwards; the upper side surface of the intermediate shell (503), the upper side surface of the flow guide member (506) and the upper side surface of the first tube (401) are all inclined surfaces; the material dividing member (901), the intermediate shell (503), the flow guide member (506) and the first tube (401) are arranged in sequence from top to bottom, and are used to guide the passing materials.

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