An apparatus for high temperature baking of quartz sand

Abstract

The application relates to the technical field of quartz sand processing, in particular to a device for high-temperature baking quartz sand, which comprises a slow cooling seat, the top end of the slow cooling seat is fixed with a baking oven, the bottom end of the inside of the slow cooling seat is fixed with a slow cooling box, one side of the top end of the inside of the slow cooling seat is provided with a swing and scattering mechanism, the swing and scattering mechanism comprises a second rotating shaft, and the second rotating shaft is connected to the top end of one side of the inside of the slow cooling seat. The swing and scattering mechanism is arranged, a single power source linkage structure is adopted, a set of power synchronously drives the reciprocating swing of a discharging mechanism and the synchronous reciprocating spreading of a scattering harrow, high-temperature quartz sand is uniformly spread and scattered and sand groups are scattered when falling into the slow cooling box, the problem of uneven cooling caused by local thick material layers is eliminated, the quartz sand slowly cools in a closed environment and passes through a crystal type phase change interval, the particle thermal stress is reduced, the probability of thermal shock cracking is reduced, the generation of fine powder is reduced, and the finished product rate of high-purity quartz sand is improved.

Description

Technical Field

[0001] This invention relates to the field of quartz sand processing technology, specifically to an apparatus for high-temperature roasting of quartz sand. Background Technology

[0002] High-purity quartz sand is the core raw material for the preparation of quartz glass and has wide applications in photovoltaics, semiconductors and other fields. In the production process of high-purity quartz sand, the raw quartz sand needs to be roasted at high temperature to remove the hydroxyl groups inside the particles, surface organic matter and some volatile alkali metal impurities, thereby improving the purity of the quartz sand.

[0003] For example, patent document CN117128760A discloses a high-purity quartz sand purification and calcination device, belonging to the field of quartz sand purification technology. It includes: a base; a heater installed inside the base; a calcination furnace detachably connected to the base, with a furnace cover detachably connected to the furnace; and a material box set on the base, with a bottom cover detachably connected to the bottom of the material box. This invention uses the intermittent rotation of a grooved wheel to drive the intermittent rotation of a first rotating rod, which in turn drives multiple partitions to rotate. The rotation of these partitions discharges the quartz sand between them downwards. Combined with the reciprocating motion of a perforated plate, the quartz sand on the perforated plate is easily screened, thus preventing large impurities from being trapped on the upper side of the perforated plate, thereby optimizing the calcination convenience of the quartz sand. Furthermore, the rotation of multiple crushing rollers further crushes larger pieces of quartz sand, further optimizing the calcination convenience of the quartz sand.

[0004] The existing patent has the following shortcomings: after the high-temperature calcined quartz sand is taken out of the furnace, it can only fall directly under its own gravity and accumulate in a concentrated manner. The surface sand material is in direct contact with the ambient atmosphere and cools down rapidly, while the heat dissipation inside the material pile is slow. The temperature difference between the inside and outside of the 573℃ crystal phase transformation range of quartz sand is too large, which can easily cause thermal shock, resulting in cracking of quartz sand particles, increased fine powder content, and reduced qualification rate of high-purity quartz sand products. Therefore, it is urgent to design a device for high-temperature calcining of quartz sand to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide an apparatus for high-temperature roasting of quartz sand, in order to solve the problem of inconvenient slow cooling mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an apparatus for high-temperature roasting of quartz sand, comprising a slow cooling seat, a roasting oven fixed to the top of the slow cooling seat, a slow cooling chamber fixed to the bottom of the slow cooling seat, a swinging dispersing mechanism provided on one side of the top of the slow cooling seat, the swinging dispersing mechanism including a second rotating shaft connected to the top of one side of the slow cooling seat, a turntable fixed to the outside of the second rotating shaft, and a movable column fixed to the outside of the turntable, a reciprocating frame rotatably connected to the outside of the movable column, an upper movable plate fixed to the bottom of the reciprocating frame, and a feeding mechanism provided at the bottom of the roasting oven, the feeding mechanism including a lower rigid pipe, the lower rigid pipe being disposed in the roasting oven... At the bottom of the oven, one side of the upper movable plate is fixedly connected to the lower rigid tube via a fixing sleeve. The interior of the slow cooling base below the upper movable plate is rotatably connected to a first rotating shaft, and a gear is fixed to the outside of the first rotating shaft. A lower movable frame is fixed to one side of the top of the slow cooling box, and a lower rack is fixed to the top of the lower movable frame. An upper rack is fixed to the bottom of the upper movable plate. The upper rack, lower rack, and gear are meshed together. A connecting rod is fixed to the bottom of one side of the lower movable frame, and one end of the connecting rod extends laterally into the interior of the slow cooling box and is evenly fixed with mounting plates. A dispersing rake is evenly fixed to the bottom of the mounting plate. A motor is fixed to the outside of the slow cooling base, and the output shaft of the motor is connected to a second rotating shaft.

[0007] As a further improvement to this solution, the reciprocating frame is provided with an active groove inside, and the width of the active groove matches the width of the active column.

[0008] As a further step of this solution, the feeding mechanism includes an electric push rod, which is fixed to one side of the bottom of the slow cooling seat by a bracket. The bottom of the baking oven is fixed with a feeding pipe, which consists of an upper rigid pipe, a flexible pipe and a lower rigid pipe. The output end of the electric push rod is fixed with a sealing plate, and one end of the sealing plate extends into the interior of the upper rigid pipe.

[0009] As a further improvement to this solution, the upper rigid tube is fixed to the bottom of the baking oven, the bottom end of the upper rigid tube is connected to the top end of the flexible tube, and the bottom end of the flexible tube is connected to the top end of the lower rigid tube.

[0010] As a further step in this solution, a sealing gasket is provided at the connection between the sealing plate and the upper rigid tube.

[0011] As a further step in this solution, the upper and lower rigid tubes are made of quartz glass tubes, and the flexible tube is made of ceramic fiber braided composite tube.

[0012] As a further improvement of this solution, sealing blocks are fixed on both sides of the lower rigid tube, and a movable opening is provided at the top of the slow cooling box. Sealing grooves are provided inside the slow cooling box on both sides of the movable opening, and the sealing grooves are connected to the sealing blocks.

[0013] As a further step of this solution, a guide block is fixed to the top of the upper movable plate, and a guide groove is provided inside the slow cooling seat above the guide block, and the guide groove is connected to the guide block.

[0014] As a further improvement to this solution, the width of the guide block matches the width of the guide groove, and the guide block is T-shaped.

[0015] As a further improvement to this solution, a sealing folding cover is fitted on the outer side of the connecting rod, and the two ends of the sealing folding cover are respectively connected to the outer side of the slow cooling box and the inner side of the lower movable frame.

[0016] Compared with the prior art, the beneficial effects of the present invention are: The device for high-temperature roasted quartz sand uses a swinging and dispersing mechanism with a single power source linkage structure. A set of power synchronously drives the feeding mechanism to swing back and forth to distribute the material, and the dispersing rake synchronously spreads the material back and forth. When the high-temperature quartz sand falls into the slow cooling box, it is evenly spread and the sand clumps are dispersed, eliminating the problem of uneven cooling caused by local thick material layers. The quartz sand is slowly cooled in a closed environment and passes through the crystal phase transformation range, which reduces the thermal stress of the particles, reduces the probability of thermal shock cracking, reduces the generation of fine powder, and improves the yield of high-purity quartz sand. By adopting a three-section composite feeding pipe, with the upper and lower rigid pipes made of quartz glass and the flexible pipe made of ceramic fiber braided composite pipe, the precipitation of metal impurities can be avoided, ensuring the purity of high-purity quartz sand products. The electric push rod and the sealing plate form an independent shut-off gate valve, which can quickly achieve airtight isolation between the baking oven and the slow cooling box. The sealing blocks on both sides of the lower rigid pipe cooperate with the sealing groove of the movable port of the slow cooling box, and the cavity is continuously sealed during the swing feeding process. The high-temperature quartz sand is evenly distributed into the slow cooling box through the swing feeding pipe for sealed slow cooling, reducing the phase transformation cracking of quartz sand particles. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a frontal cross-sectional view of the present invention; Figure 3 This is a three-dimensional schematic diagram of the dispersing rake of the present invention; Figure 4 This is a three-dimensional schematic diagram of the turntable and reciprocating frame of the present invention; Figure 5 This is a front cross-sectional view of the feeding mechanism of the present invention; Figure 6 This is a top view of the slow cooling box of the present invention; Figure 7 This is a frontal cross-sectional view of the present invention in use. Figure 8 This is a top cross-sectional view of the slow-cooling seat of the present invention.

[0018] In the diagram: 1. Baking oven; 2. Slow cooling seat; 3. Swinging dispersing mechanism; 301. Upper movable plate; 302. Lower movable frame; 303. Lower rack; 304. Motor; 305. Upper rack; 306. First rotating shaft; 307. Gear; 308. Connecting rod; 309. Mounting plate; 310. Dispersing rake; 311. Reciprocating frame; 312. Movable groove; 313. Turntable; 314. Second rotating shaft; 315. Movable column; 4. Guide block; 5. Feeding mechanism; 501. Feeding pipe; 502. Upper rigid pipe; 503. Flexible hose; 504. Lower rigid pipe; 506. Electric push rod; 505. Sealing plate; 6. Guide groove; 7. Sealing groove; 8. Sealing block; 9. Fixing sleeve; 10. Slow cooling box; 11. Movable opening. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-8 The present invention provides the following technical solution: Example 1: To address the problem of particle cracking caused by large cooling temperature differences after high-temperature quartz sand roasting and unloading in existing technologies, the following technical solution is disclosed. Please refer to the following for details. Figures 1-8As shown, a device for high-temperature roasting of quartz sand includes a slow-cooling seat 2, a roasting oven 1 fixed to the top of the slow-cooling seat 2, a slow-cooling box 10 fixed to the bottom of the slow-cooling seat 2, and a swing-and-disperse mechanism 3 provided on one side of the top of the slow-cooling seat 2. The swing-and-disperse mechanism 3 includes a second rotating shaft 314, which is connected to the top of one side of the slow-cooling seat 2. A turntable 313 is fixed to the outside of the second rotating shaft 314, and a movable column 315 is fixed to the outside of the turntable 313. A reciprocating frame 311 is rotatably connected to the outside of the movable column 315. An upper movable plate 301 is fixed to the bottom end of the frame 311. A feeding mechanism 5 is provided at the bottom end of the baking oven 1, and the feeding mechanism 5 includes a lower rigid tube 504. The lower rigid tube 504 is located at the bottom end of the baking oven 1. One side of the upper movable plate 301 is fixedly connected to the lower rigid tube 504 through a fixing sleeve 9. The slow cooling seat 2 below the upper movable plate 301 is rotatably connected to a first rotating shaft 306, and a gear 307 is fixed to the outside of the first rotating shaft 306. A lower movable frame 302 is fixed to one side of the top of the slow cooling box 10, and the top of the lower movable frame 302 is... A lower rack 303 is fixed, and an upper rack 305 is fixed to the bottom of the upper movable plate 301. The upper rack 305, lower rack 303, and gear 307 are meshed together. A connecting rod 308 is fixed to the bottom of one side of the lower movable frame 302, and one end of the connecting rod 308 is inserted laterally into the interior of the slow cooling box 10 and a mounting plate 309 is evenly fixed thereon. A dispersing rake 310 is evenly fixed to the bottom of the mounting plate 309. A motor 304 is fixed to the outside of the slow cooling seat 2, and the output shaft of the motor 304 is connected to the second rotating shaft 314. The reciprocating frame 31... The interior of the 1 is provided with a movable groove 312, and the width of the movable groove 312 matches the width of the movable column 315. The top of the upper movable plate 301 is fixed with a guide block 4. The interior of the slow cooling seat 2 above the guide block 4 is provided with a guide groove 6, and the guide groove 6 is connected to the guide block 4. The width of the guide block 4 matches the width of the guide groove 6. The guide block 4 is T-shaped. The outer side of the connecting rod 308 is fitted with a sealing folding cover, and the two ends of the sealing folding cover are respectively connected to the outer side of the slow cooling box 10 and the inner side of the lower movable frame 302. In this embodiment, during the production process of high-purity quartz sand, the quartz sand raw material is roasted in a high-temperature atmosphere in the roasting oven 1 to remove the hydroxyl groups inside the particles, surface organic matter and some volatile alkali metal impurities. After the roasting process is completed, the feeding channel is opened and the high-temperature quartz sand falls into the slow cooling box 10 through the feeding mechanism 5 for sealed slow cooling to avoid the high-temperature quartz sand from directly contacting the outside atmosphere and causing thermal shock cracking. Motor 304 drives the second rotating shaft 314 to rotate continuously, causing the turntable 313 and the movable column 315 on the turntable 313 to rotate synchronously. The movable column 315 slides in the movable groove 312 of the reciprocating frame 311, converting the rotational motion of the turntable 313 into the horizontal reciprocating linear motion of the reciprocating frame 311. The reciprocating frame 311 drives the upper movable plate 301. The upper movable plate 301 moves synchronously back and forth. On the one hand, the fixed sleeve 9 drives the feeding mechanism 5 to swing horizontally back and forth, so that the high-temperature quartz sand flowing out of the baking oven 1 is evenly spread into the slow cooling box 10, avoiding the quartz sand from accumulating in a single point to form a thick layer. On the other hand, the upper rack 305 fixed at the bottom of the upper movable plate 301 moves synchronously back and forth with the upper movable plate 301, driving the gear 307 meshing with it to rotate in both directions. The gear 307 synchronously drives the lower rack 303 to move in the opposite direction horizontally back and forth. The lower rack 303 drives the mounting plate 309 and the dispersing rake 310 to move back and forth inside the slow cooling box 10 through the lower movable frame 302 and the connecting rod 308. While the feeding mechanism 5 swings to distribute the material, the dispersing rake 310 moves back and forth synchronously with the falling material trajectory to continuously disperse and flatten the high-temperature quartz sand lumps that fall and accumulate, breaking up the sand agglomerates and making the quartz sand in the slow cooling box 10 form a thin layer of material with uniform thickness. The sealing folding cover set on the outside of the connecting rod 308 maintains the airtightness of the slow cooling box 10 cavity and prevents cold air from entering the box with the movement of the connecting rod 308, causing the quartz sand to cool down suddenly. The uniformly spread and flattened quartz sand is slowly cooled in a sealed slow cooling box 10, smoothly passing through the 573℃ quartz α-β crystal phase transformation range, reducing the internal thermal stress of the particles and inhibiting the thermal shock fracture of the quartz sand to produce fine powder. After the overall temperature of the quartz sand drops below 400℃, it is unloaded to the outside, completing the cooling process after the high-purity quartz sand is roasted. The entire mechanism adopts a single power source and realizes the mechanical linkage and synchronization of the material feeding swing and sand dispersing actions through the cam reciprocating mechanism and the gear 307 double rack meshing transmission, and the material feeding and dispersing sequence is automatically matched.

[0021] Example 2: This example differs from Example 1 in that a feeding mechanism 5 is incorporated to assist in the overall operation. Therefore, the following technical solution is disclosed. Please refer to the details below. Figure 2 and Figure 5As shown, the feeding mechanism 5 includes an electric push rod 506, which is fixed to one side of the bottom of the slow cooling base 2 by a bracket. A feeding pipe 501 is fixed to the bottom of the baking oven 1, and the feeding pipe 501 consists of an upper rigid pipe 502, a flexible hose 503, and a lower rigid pipe 504. A sealing plate 505 is fixed to the output end of the electric push rod 506, and one end of the sealing plate 505 extends into the interior of the upper rigid pipe 502. The upper rigid pipe 502 is fixed to the bottom of the baking oven 1, and the bottom end of the upper rigid pipe 502 is connected to the flexible hose 503. The top ends of the upper tube 503 and the bottom end of the lower tube 504 are connected. A sealing gasket is provided at the connection between the sealing plate 505 and the upper tube 502. The upper tube 502 and the lower tube 504 are made of quartz glass tubes. The hose 503 is made of ceramic fiber braided composite tube. Sealing blocks 8 are fixed on both sides of the lower tube 504. The top of the slow cooling box 10 is provided with an movable opening 11. Sealing grooves 7 are provided inside the slow cooling box 10 on both sides of the movable opening 11, and the sealing grooves 7 are connected to the sealing blocks 8. In this embodiment, after the baking oven 1 completes the high-temperature baking of the quartz sand, the high-temperature quartz sand is sent into the lower slow cooling box 10 for sealed slow cooling through the feeding mechanism 5. The feeding pipe 501 of the feeding mechanism 5 is divided into three sections: upper hard pipe 502, soft pipe 503 and lower hard pipe 504. The upper hard pipe 502 is fixedly connected to the bottom of the baking oven 1 to receive the high-temperature quartz sand. The lower end of the upper hard pipe 502 is connected to the ceramic fiber braided composite material soft pipe 503. The lower end of the soft pipe 503 is connected to the lower hard pipe 504. The three-section composite feeding pipe 501 can realize the swing displacement of the lower hard pipe 504 to adapt to the cloth feeding action. The opening and closing of the material feeding is achieved by the electric push rod 506 driving the sealing plate 505. When the electric push rod 506 extends, the sealing plate 505 is inserted into the upper rigid tube 502, cutting off the material feeding channel from the baking oven 1 to the slow cooling box 10, and achieving airtight isolation between the upper and lower cavities. When the electric push rod 506 retracts, the sealing plate 505 exits the upper rigid tube 502, the material feeding channel is opened, and high-temperature quartz sand is conveyed downward along the upper rigid tube 502, the hose 503, and the lower rigid tube 504. The sealing blocks 8 on both sides of the lower rigid tube 504 cooperate with the sealing groove 7 of the movable opening 11 at the top of the slow cooling box 10 to maintain the sealing performance of the movable opening 11 during the reciprocating swing of the lower rigid tube 504, reducing the infiltration of outside air into the slow cooling box 10. High-temperature silica sand is reciprocated and evenly distributed within the slow cooling chamber 10 via a three-section, oscillating composite feeding pipe 501. The upper rigid pipe 502 and lower rigid pipe 504 of the feeding pipe 501 are made of quartz glass to prevent the precipitation of metallic impurities and avoid contamination of the high-purity silica sand. The middle flexible tube 503 is made of ceramic fiber braided composite tubing, capable of withstanding reciprocating bending and oscillation, while also withstanding short-term high-temperature sand erosion. The silica sand is slowly cooled within the sealed space of the slow cooling chamber 10, smoothly passing through the crystal phase transition temperature range. It is discharged only after the temperature has dropped significantly, completing the quartz sand roasting and cooling process.

[0022] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An apparatus for high-temperature roasting of quartz sand, comprising a slow cooling seat (2), characterized in that: The top of the slow cooling base (2) is fixed with a baking oven (1), and the bottom of the slow cooling base (2) is fixed with a slow cooling box (10). A swing dispersing mechanism (3) is provided on one side of the top of the slow cooling base (2). The swing dispersing mechanism (3) includes a second rotating shaft (314). The second rotating shaft (314) is connected to the top of one side of the slow cooling base (2). A turntable (313) is fixed on the outside of the second rotating shaft (314), and the outside of the turntable (313) is... A movable column (315) is fixed, and a reciprocating frame (311) is rotatably connected to the outside of the movable column (315). An upper movable plate (301) is fixed to the bottom end of the reciprocating frame (311). A feeding mechanism (5) is provided at the bottom end of the baking oven (1), and the feeding mechanism (5) includes a lower rigid tube (504). The lower rigid tube (504) is provided at the bottom end of the baking oven (1). One side of the upper movable plate (301) is fixed to the lower rigid tube (504) by a fixing sleeve (9). The upper movable plate (301) is rotatably connected to the slow cooling seat (2) below it, with a first rotating shaft (306) and a gear (307) fixed to the outside of the first rotating shaft (306). A lower movable frame (302) is fixed to one side of the top of the slow cooling box (10), and a lower rack (303) is fixed to the top of the lower movable frame (302). An upper rack (305) is fixed to the bottom of the upper movable plate (301). The upper rack (305) and the lower rack (307) are connected to the lower movable plate (301). 03) and gear (307) meshing connection, the bottom end of the lower movable frame (302) is fixed with a connecting rod (308), and one end of the connecting rod (308) is horizontally inserted into the interior of the slow cooling box (10) and a mounting plate (309) is evenly fixed thereon. The bottom end of the mounting plate (309) is evenly fixed with a dispersing rake (310). The outside of the slow cooling seat (2) is fixed with a motor (304), and the output shaft of the motor (304) is connected to the second rotating shaft (314).

2. The apparatus for high-temperature roasting of quartz sand according to claim 1, characterized in that: The reciprocating frame (311) is provided with an active groove (312) inside, and the width of the active groove (312) matches the width of the active column (315).

3. The apparatus for high-temperature roasting of quartz sand according to claim 1, characterized in that: The feeding mechanism (5) includes an electric push rod (506), and the electric push rod (506) is fixed to one side of the bottom of the slow cooling seat (2) by a bracket. The bottom of the baking oven (1) is fixed with a feeding pipe (501), and the feeding pipe (501) is composed of an upper rigid pipe (502), a flexible hose (503) and a lower rigid pipe (504). The output end of the electric push rod (506) is fixed with a sealing plate (505), and one end of the sealing plate (505) extends into the interior of the upper rigid pipe (502).

4. The apparatus for high-temperature roasting of quartz sand according to claim 3, characterized in that: The upper rigid tube (502) is fixed to the bottom of the baking oven (1). The bottom end of the upper rigid tube (502) is connected to the top end of the flexible tube (503), and the bottom end of the flexible tube (503) is connected to the top end of the lower rigid tube (504).

5. The apparatus for high-temperature roasting of quartz sand according to claim 3, characterized in that: A sealing gasket is provided at the connection between the sealing plate (505) and the upper rigid tube (502).

6. The apparatus for high-temperature roasting of quartz sand according to claim 3, characterized in that: The upper rigid tube (502) and the lower rigid tube (504) are made of quartz glass tubes, and the flexible tube (503) is made of ceramic fiber braided composite tube.

7. The apparatus for high-temperature roasting of quartz sand according to claim 3, characterized in that: Both sides of the lower rigid tube (504) are fixed with sealing blocks (8), and the top of the slow cooling box (10) is provided with a movable port (11). Both sides of the movable port (11) of the slow cooling box (10) are provided with sealing grooves (7), and the sealing grooves (7) are connected to the sealing blocks (8).

8. The apparatus for high-temperature roasting of quartz sand according to claim 1, characterized in that: The top of the upper movable plate (301) is fixed with a guide block (4), and the interior of the slow cooling seat (2) above the guide block (4) is provided with a guide groove (6), and the guide groove (6) is connected to the guide block (4).

9. The apparatus for high-temperature roasting of quartz sand according to claim 8, characterized in that: The width of the guide block (4) matches the width of the guide groove (6), and the guide block (4) is T-shaped.

10. The apparatus for high-temperature roasting of quartz sand according to claim 1, characterized in that: The outer side of the connecting rod (308) is fitted with a sealing folding cover, and the two ends of the sealing folding cover are respectively connected to the outer side of the slow cooling box (10) and the inner side of the lower movable frame (302).

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