A preparation method of silicon carbide nanowire aerogel and a calcination furnace

Abstract

The present invention belongs to the technical field of calcination furnaces, and specifically relates to a preparation method of silicon carbide nanowire aerogel and a calcination furnace kiln, including a base. A regulating seat is rotatably arranged on the left side of the upper end surface of the base. A mounting plate is fixedly connected to the right end of the upper side of the regulating seat. A plurality of push plates for pushing the mixed powder are inserted and slidably arranged on the furnace body. A magnetic block is arranged in the middle of one side of the push plate, and the magnetic block can be adsorbed to the edge of the furnace body. The present invention realizes that during the calcination process of the mixed powder, the furnace body is driven to rotate, and a plurality of push plates push the mixed powder in the inner cavity of the furnace body. When the mixed powder is pushed by the push plate to the upper part of the inner cavity of the furnace body, the mixed powder will fall under the action of gravity. That is, with the cooperation of a plurality of push plates, the mixed powder can move continuously to improve the dispersion degree of the mixed powder, avoiding the situation that due to the piled-up state of the mixed powder, some materials burn incompletely, thus affecting the overall calcination effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of calcining furnaces, and specifically relates to a method for preparing silicon carbide nanowire aerogel and a calcining furnace kiln. Background Art

[0002] Silicon carbide nanowire aerogel is a porous gel material formed by the self-assembly of silicon carbide nanowires, and has broad application prospects in multiple fields. During the preparation process of silicon carbide nanowire aerogel, a certain proportion of silicon powder, polytetrafluoroethylene micro powder, and tungsten powder need to be mixed evenly to obtain a mixed powder. After the mixed powder is dried and sieved, it is then subjected to calcination treatment. Calcination can promote the continuous growth of silicon carbide nanowires.

[0003] The patent with the publication number CN216347721U discloses a multi-effect calcining furnace with a stable processing environment, including a box body. A calcining furnace body is rotatably connected inside the box body. A furnace cover is fixed on one side of the calcining furnace body. Air supply branch pipes are installed on both sides of the calcining furnace body inside the box body. A plurality of jet nozzles are installed on the air supply branch pipes. An igniter is installed on one side of the jet nozzles. The air supply branch pipes are connected to an air supply main pipe passing through the box body. The tail end of the calcining furnace body is connected to a rotating disk rotating on the outer wall of the box body. A plurality of driving grooves are formed on the rotating disk. The structure of this patent is novel and ingenious. By the operation of the set rotating motor, the driving disk is driven to rotate, and then the rotating disk is driven to rotate intermittently through the driving arm, and finally the calcining furnace body is driven to rotate intermittently, which can ensure that the temperature is uniform everywhere inside the calcining furnace body, so that the material can be kept in a stable working environment and the calcination quality of the material can be ensured.

[0004] However, the above technical solution still has the following deficiencies in actual application:

[0005] The material is added into the calcining furnace body and then the calcining furnace body is heated to calcine the material. However, when the material is added into the calcining furnace body, it may be in a piled-up state. When the material is piled up, some of the material will be insufficiently heated, resulting in incomplete combustion and affecting the overall calcination effect.

[0006] Therefore, the present invention provides a method for preparing silicon carbide nanowire aerogel and a calcining furnace kiln. Summary of the Invention

[0007] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background art, the present invention proposes a method for preparing silicon carbide nanowire aerogel and a calcining furnace kiln.

[0008] The technical solution adopted by the present invention to solve its technical problems is as follows: A calcination furnace kiln for silicon carbide nanowire aerogel, including a base, on the upper left side of the base end face, an adjustment seat is rotatably arranged, on the upper right end of the adjustment seat, an installation disk is fixedly connected, on the left end face of the installation disk, a furnace body is rotatably arranged, on one side of the left end of the furnace body, a furnace door is rotatably arranged, on the furnace body, a plurality of push plates for pushing the mixed powder are inserted and slidably arranged, and in the middle of one side of the push plate, a magnetic block is arranged, and the magnetic block can be adsorbed to the edge of the furnace body. In the middle of the right end face of the installation disk, an igniter is fixedly connected, and the flame nozzle of the igniter penetrates through the installation disk and extends into the inner cavity of the furnace body. On the installation disk, an intermittent plugging and lifting mechanism is arranged to prevent the mixed powder from getting stuck at the included angle between the push plate and the inner wall of the furnace body;

[0009] The intermittent plugging and lifting mechanism includes a slide rail fixedly connected to the upper side of the left end face of the installation disk. The slide rail is inserted and slidably connected with a lifting plate. On the left side of the lifting plate, two slide bars are slidably connected. At the rear end of the slide bar, a plug is fixedly connected. On one side of the push plate, a plug interface is arranged, and the plug can be inserted into the plug interface.

[0010] Preferably, on the upper right side of the right end face of the installation disk, a vacuum pump is fixedly connected. The air inlet end of the vacuum pump is communicated with an air extraction pipe. The air extraction pipe penetrates through the installation disk and extends into the inner cavity of the furnace body. On one side of the installation disk, an air inlet is penetrated and fixedly connected, and the air inlet extends into the inner cavity of the furnace body.

[0011] Preferably, a gear ring is sleeved and fixedly connected to the right side of the furnace body. In the middle of the front side of the left end face of the installation disk, a gear is rotatably arranged. The gear meshes with the outer ring teeth of the gear ring. In the middle of the front side of the right end face of the installation disk, a motor one is fixedly connected. The output end of the motor one is fixedly connected to the gear.

[0012] Preferably, on the upper side of the left end face of the installation disk, a motor three is fixedly connected. The output end of the motor three is fixedly connected to a first threaded rod. The upper and lower ends of the first threaded rod are rotatably arranged on the installation disk. The first threaded rod is threadedly connected to the right end of the lifting plate.

[0013] Preferably, on the left side of the front end face of the lifting plate, an electric push rod is fixedly connected. The piston end of the electric push rod is fixedly connected to the middle of the front end of the plug.

[0014] Preferably, on one side of the installation disk, a flattening column is inserted and slidably connected. The flattening column is threadedly connected to a third threaded rod. The right end of the third threaded rod is rotatably arranged on an installation rod. The left end of the installation rod is fixedly connected to the installation disk.

[0015] Preferably, on the right end face of the installation rod, a motor two is fixedly connected. The output end of the motor two is fixedly connected to the right end of the third threaded rod.

[0016] Preferably, a connecting rod is rotatably arranged in the middle of the lower end face of the adjusting seat, and a slider is rotatably arranged at the lower end of the connecting rod. The slider is slidably connected to the base.

[0017] Preferably, a second threaded rod is threadedly connected to the lower end of the slider. Both ends of the second threaded rod are rotatably arranged on the base. A fourth motor is fixedly connected to the middle of the right end face of the base, and the output end of the fourth motor is fixedly connected to the right end of the second threaded rod.

[0018] A method for preparing silicon carbide nanowire aerogel includes the following specific steps:

[0019] S1. Using absolute ethanol as a solvent, a certain proportion of silicon powder, polytetrafluoroethylene micropowder and tungsten powder are mixed evenly by ball milling.

[0020] S2. After drying and sieving the mixed powder, it is transferred to the furnace body.

[0021] S3. After evacuating the furnace body, argon gas with a certain pressure is filled. The igniter is used to locally ignite the mixed powder. The high heat released by the combustion reaction and the high gas pressure generated can promote the continuous growth of silicon carbide nanowires, so as to quickly construct aerogel in three-dimensional space.

[0022] S4. After the combustion reaction ends, the light block in the furnace body is taken out and carbon is removed by oxidation in the air to obtain silicon carbide nanowire aerogel.

[0023] The beneficial effects of the present invention are as follows:

[0024] 1. A preparation method of silicon carbide nanowire aerogel and a calcination furnace according to the present invention can drive the furnace body to rotate during the calcination process of the mixed powder. Multiple baffle plates push the mixed powder in the inner cavity of the furnace body. When the mixed powder is pushed by the baffle plates to the upper part of the inner cavity of the furnace body, the mixed powder will fall under the action of gravity. During the falling process, the mixed powder will disperse and then fall again to the bottom of the inner cavity of the furnace body, and then be pushed by the remaining baffle plates. Thus, with the cooperation of multiple baffle plates, the mixed powder can move continuously to improve the dispersion degree of the mixed powder, avoiding the situation that due to the piled-up state of the mixed powder, some materials are not fully burned, which in turn affects the overall calcination effect. Moreover, since the rotation mode of the furnace body is intermittent rotation, and by using an intermittent plugging and lifting mechanism, when a baffle plate is in the middle position above the furnace body and in a vertical state, the plug block is driven to move and inserted into the plug interface, and then the lifting plate is lifted. Thus, the baffle plate can be driven to rise by the plug block, and the two end faces of the baffle plate form scraping with the edge of the furnace body until the bottom of the baffle plate retracts to the edge of the furnace body and the baffle plate does not separate from the furnace body. At this time, no angle is formed between the baffle plate and the inner wall of the furnace body, so that the mixed powder stuck in the angle can fall off. Therefore, when the mixed powder accumulates at the angle between the baffle plate and the inner wall of the furnace body, due to the mutual extrusion between the mixed powders, some mixed powders are stuck at the angle, resulting in the situation that the mixed powder cannot fall normally and affecting the dispersion effect of the mixed powder. Moreover, when the mixed powder is at the angle between the baffle plate and the inner wall of the furnace body and is aligned with the flattening column, the flattening column can be driven to slide horizontally to push the mixed powder. The mixed powder higher than the lower end face of the flattening column will collapse and become a flat state. Thus, the mixed powder can be evenly spread at the angle between the baffle plate and the inner wall of the furnace body. Then the flattening column returns to its original position, and the baffle plate is driven to move to push the mixed powder. Thus, when the mixed powder falls, it will not concentrate at the same position, further ensuring the dispersion degree of the mixed powder. Moreover, whenever a baffle plate is driven to rise by the plug block, the flattening column can also move to flatten the mixed powder, ensuring that the mixed powder is in a flat state before each fall, and ensuring the continuous combustion effect of the mixed powder.

[0025] 2. A preparation method of silicon carbide nanowire aerogel and a calcination furnace according to the present invention can drive the furnace body to rotate by driving the second threaded rod to rotate by the fourth motor, so that the slider moves horizontally and the connecting rod rotates. When it is necessary to take out the lightweight block obtained by combustion, the furnace body can be driven to tilt, so that the lightweight block slides out of the furnace body under the action of gravity, which is more convenient for collecting the lightweight block obtained by combustion.

[0026] 3. A preparation method of silicon carbide nanowire aerogel and a calcination furnace according to the present invention. The prepared silicon carbide nanowire aerogel has excellent properties such as high temperature resistance, acid and alkali corrosion resistance, low thermal conductivity, high compressibility and recoverability, and good hydrophobicity. Moreover, its density can be controlled within a large range, and it can be used as high-temperature filter materials, thermal insulation materials, catalyst carriers, etc. There is a huge market demand in the fields of aerospace, automotive industry, energy, chemical industry, construction, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below with reference to the drawings.

[0028] Figure 1 It is a schematic three-dimensional structure diagram of the present invention;

[0029] Figure 2 It is a schematic partial three-dimensional structure diagram at the installation disk;

[0030] Figure 3 It is a schematic partial three-dimensional structure diagram at the lifting plate;

[0031] Figure 4 It is a schematic partial three-dimensional structure diagram at the slider;

[0032] Figure 5 It is a schematic partial three-dimensional structure diagram at the furnace body;

[0033] Figure 6 It is a schematic partial three-dimensional structure diagram at the adjusting seat;

[0034] Figure 7 It is Figure 6 The partial enlarged view at A in

[0035] Figure 8 It is a schematic plan structure diagram of the dial plate;

[0036] Figure 9 It is a schematic partial three-dimensional structure diagram at the flattening column;

[0037] Figure 10 It is a process flow chart for the preparation of silicon carbide nanowire aerogel;

[0038] Figure 11 It is a macroscopic photograph of silicon carbide nanowire aerogel;

[0039] Figure 12 It is an XRD pattern of silicon carbide nanowire aerogel;

[0040] Figure 13 It is an SEM photograph of silicon carbide nanowire aerogel;

[0041] Figure 14 It is a performance table of silicon carbide nanowire aerogel.

[0042] In the figure: 1. Base; 2. Adjusting seat; 3. Furnace body; 4. Furnace door; 5. Mounting plate; 6. Pusher plate; 7. Insertion interface; 8. Gear; 9. Motor 1; 10. Mounting rod; 11. Flattening column; 12. Motor 2; 13. Ring gear; 14. Motor 3; 15. First threaded rod; 16. Lifting plate; 17. Electric push rod; 18. Slide bar; 19. Insert block; 20. Flame nozzle; 21. Air inlet; 22. Exhaust pipe; 23. Motor 4; 24. Connecting rod; 25. Second threaded rod; 26. Slide block; 27. Vacuum pump; 28. Igniter; 29. Third threaded rod; 30. Slide rail; 31. Magnet block. Detailed implementation mode

[0043] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. 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 belong to the scope of protection of the present invention.

[0044] Please refer to Figures 1-14 , the present invention provides a technical solution: a silicon carbide nanowire aerogel calcination furnace kiln, including a base 1, a regulating seat 2 is rotatably arranged on the left side of the upper end surface of the base 1, an installation plate 5 is fixedly connected to the right end of the upper side of the regulating seat 2, a furnace body 3 is rotatably arranged on the left end surface of the installation plate 5, a furnace door 4 is rotatably arranged on one side of the left end of the furnace body 3, a plurality of pusher plates 6 for pushing the mixed powder are inserted and slidably arranged on the furnace body 3, and a magnet block 31 is arranged in the middle of one side of the pusher plate 6, and the magnet block 31 can be adsorbed to the edge of the furnace body 3. An igniter 28 is fixedly connected to the middle of the right end surface of the installation plate 5, and the flame nozzle 20 of the igniter 28 penetrates through the installation plate 5 and extends into the inner cavity of the furnace body 3. An intermittent plugging and lifting mechanism for preventing the mixed powder from getting stuck at the included angle between the pusher plate 6 and the inner wall of the furnace body 3 is arranged on the installation plate 5;

[0045] The intermittent plugging and lifting mechanism includes a slide rail 30 fixedly connected to the upper side of the left end surface of the installation plate 5, a lifting plate 16 is inserted and slidably connected to the slide rail 30, two slide bars 18 are slidably connected to the left side of the lifting plate 16, an insert block 19 is fixedly connected to the rear end of the slide bar 18, an insertion interface 7 is arranged on one side of the pusher plate 6, and the insert block 19 can be inserted into the insertion interface 7.

[0046] In this embodiment, as Figures 1-3 , Figures 5-9 shown, a vacuum pump 27 is fixedly connected to the upper side of the right end surface of the installation plate 5, the air inlet end of the vacuum pump 27 is communicated with an exhaust pipe 22, the exhaust pipe 22 penetrates through the installation plate 5 and extends into the inner cavity of the furnace body 3, an air inlet 21 is penetrated and fixedly connected to one side of the installation plate 5, and the air inlet 21 extends into the inner cavity of the furnace body 3;

[0047] A gear ring 13 is sleeved on the right side of the furnace body 3 and fixedly connected thereto. In the middle of the front side of the left end face of the mounting plate 5, a gear 8 is rotatably arranged. The gear 8 meshes with the outer teeth of the gear ring 13. In the middle of the front side of the right end face of the mounting plate 5, a first motor 9 is fixedly connected. The output end of the first motor 9 is fixedly connected to the gear 8.

[0048] On the upper side of the left end face of the mounting plate 5, a third motor 14 is fixedly connected. The output end of the third motor 14 is fixedly connected to a first threaded rod 15. Both the upper and lower ends of the first threaded rod 15 are rotatably arranged on the mounting plate 5. The first threaded rod 15 is threadedly connected to the right end of the lifting plate 16.

[0049] On the left side of the front end face of the lifting plate 16, an electric push rod 17 is fixedly connected. The piston end of the electric push rod 17 is fixedly connected to the middle of the front end of the insert block 19.

[0050] A flattening column 11 is inserted and slidably connected to one side of the mounting plate 5. The flattening column 11 is threadedly connected to a third threaded rod 29. The right end of the third threaded rod 29 is rotatably provided with a mounting rod 10. The left end of the mounting rod 10 is fixedly connected to the mounting plate 5.

[0051] On the right end face of the mounting rod 10, a second motor 12 is fixedly connected. The output end of the second motor 12 is fixedly connected to the right end of the third threaded rod 29.

[0052] Specifically, silicon carbide nanowire aerogel is a porous gel material formed by the self-assembly of silicon carbide nanowires and has broad application prospects in many fields. During the preparation of silicon carbide nanowire aerogel, a certain proportion of silicon powder, polytetrafluoroethylene micro-powder, and tungsten powder need to be mixed evenly to obtain a mixed powder. After the mixed powder is dried and sieved, it is then subjected to a calcination treatment. The calcination can promote the continuous growth of silicon carbide nanowires. When the existing calcination furnace is in use, the material is added into the calcination furnace body, and then the calcination furnace body is heated to calcine the material. However, when the material is added into the calcination furnace body, it may be in a piled-up state. When the material is piled up, some of the material will be insufficiently heated, resulting in incomplete combustion and affecting the overall calcination effect.

[0053] Therefore, to solve the above problems, during the use of this embodiment, the mixed powder to be calcined is added into the furnace body 3, and then the furnace door 4 is closed. The inside of the furnace body 3 is evacuated by using a vacuum pump 27 and an air extraction pipe 22, and then argon gas at a certain pressure is filled into the furnace body 3 through an air inlet 21. Then, an igniter 28 is used to ignite the mixed powder. The high heat released by the combustion reaction and the high gas pressure generated can promote the continuous growth of silicon carbide nanowires.

[0054] Meanwhile, the motor 1 drives the gear 8 to rotate, so that the gear ring 13 and the furnace body 3 can rotate simultaneously. When the furnace body 3 rotates, multiple baffle plates 6 will also rotate synchronously to push the mixed powder in the inner cavity of the furnace body 3. When the mixed powder is pushed by the baffle plate 6 to the upper part of the inner cavity of the furnace body 3, the mixed powder will fall under the action of gravity. During the falling process, the mixed powder will disperse and then fall to the bottom of the inner cavity of the furnace body 3 again, and then be pushed by the other baffle plates 6. Thus, with the cooperation of multiple baffle plates 6, the mixed powder can move continuously to improve the dispersion degree of the mixed powder, thereby avoiding the situation that due to the piled-up state of the mixed powder, some materials are not fully burned, which in turn affects the overall calcination effect;

[0055] Moreover, since the mixed powder is at the included angle between the baffle plate 6 and the inner cavity of the furnace body 3 when moving, when the mixed powder accumulates at the included angle, some of the mixed powder may be stuck at the included angle due to the mutual extrusion between the mixed powder, resulting in the situation that the mixed powder cannot fall normally, affecting the dispersion effect of the mixed powder. Therefore, the rotation mode of the furnace body 3 is intermittent rotation. And when a baffle plate 6 is at the middle position above the furnace body 3 and in a vertical state, the electric push rod 17 drives the insertion block 19 to move and insert into the insertion interface 7, and then the motor 3 14 drives the threaded rod 1 15 to rotate, making the lifting plate 16 rise. Thus, the insertion block 19 can be used to drive the baffle plate 6 to rise, so that the two end faces of the baffle plate 6 form a scrape with the edge of the furnace body 3 until the bottom of the baffle plate 6 retracts to the edge of the furnace body 3 and the baffle plate 6 does not separate from the furnace body 3. At this time, the baffle plate 6 no longer forms an included angle with the inner wall of the furnace body 3, so that the mixed powder stuck at the included angle can fall off, thereby avoiding the situation that when the mixed powder accumulates at the included angle between the baffle plate 6 and the inner wall of the furnace body 3, some of the mixed powder is stuck at the included angle due to the mutual extrusion between the mixed powder, resulting in the situation that the mixed powder cannot fall normally, affecting the dispersion effect of the mixed powder. After the powder at the included angle falls off, the baffle plate 6 is driven to reset again, and the baffle plate 6 can be positioned by the adsorption of the magnetic block 31 and the furnace body 3, and will not slide into the furnace body 3, and the baffle plate 6 can continue to work;

[0056] Moreover, when the mixed powder is placed inside the furnace body 3, if the mixed powder is in a piled-up state, it will cause the mixed powder to fall to the same position every time it drops, and then accumulate at the same position, still resulting in insufficient combustion. Therefore, when the mixed powder is at the included angle between the baffle 6 and the inner wall of the furnace body 3 and is aligned with the leveling column 11, the motor two 12 can be used to drive the threaded rod three 29 to rotate, so that the leveling column 11 slides horizontally to push the mixed powder. The mixed powder higher than the lower end face of the leveling column 11 will collapse and become a flat state, so that the mixed powder can be evenly spread at the included angle between the baffle 6 and the inner wall of the furnace body 3. Then the leveling column 11 resets, and then the baffle 6 is driven to move to push the mixed powder, so that the mixed powder will not concentrate at the same position when it drops, further ensuring the dispersion degree of the mixed powder. Moreover, whenever a baffle 6 is driven to rise by the inserting block 19, the leveling column 11 can also move to level the mixed powder, ensuring that the mixed powder is in a flat state before each drop, and ensuring the continuous combustion effect of the mixed powder;

[0057] Finally, after the combustion reaction ends, open the furnace door 4 and take out the obtained light block.

[0058] In this embodiment, as Figure 4 and Figure 6 shown, a connecting rod 24 is rotatably arranged in the middle of the lower end face of the adjusting seat 2, and a slider 26 is rotatably arranged at the lower end of the connecting rod 24. The slider 26 is slidably connected to the base 1;

[0059] The lower end of the slider 26 is threadedly connected with a threaded rod two 25. Both ends of the threaded rod two 25 are rotatably arranged on the base 1. The middle of the right end face of the base 1 is fixedly connected with a motor four 23, and the output end of the motor four 23 is fixedly connected to the right end of the threaded rod two 25;

[0060] Specifically, by using the motor four 23 to drive the threaded rod two 25 to rotate, the slider 26 can be made to move horizontally, the connecting rod 24 can be rotated, and thus the furnace body 3 can be rotated. When it is necessary to take out the obtained light block by combustion, the furnace body 3 can be driven to tilt, so that the light block slides out of the furnace body 3 under the action of gravity, and thus it is more convenient to collect the obtained light block by combustion.

[0061] A preparation method of silicon carbide nanowire aerogel includes the following specific steps:

[0062] S1. Using absolute ethanol as a solvent, a certain proportion of silicon powder, polytetrafluoroethylene micro powder and tungsten powder are mixed evenly by ball milling;

[0063] S2. After drying and sieving the mixed powder, transfer it to the furnace body 3;

[0064] S3. After evacuating the furnace body 3, fill it with argon at a certain pressure. Use the igniter 28 to locally ignite the mixed powder. The high heat released by the combustion reaction and the high gas pressure generated can promote the continuous growth of silicon carbide nanowires, thereby rapidly constructing the aerogel in three-dimensional space;

[0065] S4. After the combustion reaction ends, take out the lightweight block in the furnace body 3, and after oxidizing and removing carbon in the air, silicon carbide nanowire aerogel can be obtained.

[0066] Figures 10-14 They are respectively the process flow chart for the preparation of silicon carbide nanowire aerogel, the macroscopic photo of silicon carbide nanowire aerogel, the XRD pattern of silicon carbide nanowire aerogel, the SEM photo of silicon carbide nanowire aerogel, and the performance table of silicon carbide nanowire aerogel.

[0067] Working principle: add the mixed powder to be calcined into the furnace body 3, then close the furnace door 4, use the vacuum pump 27 and the exhaust pipe 22 to evacuate the interior of the furnace body 3, then use the air inlet 21 to fill the interior of the furnace body 3 with argon gas of a certain pressure, and then use the igniter 28 to ignite the mixed powder. The high heat released by the combustion reaction and the high pressure generated can promote the continuous growth of silicon carbide nanowires; at the same time, use the motor 9 to drive the gear 8 to rotate, so that the ring gear 13 and the furnace body 3 can rotate at the same time. When the furnace body 3 rotates, the multiple paddles 6 will also rotate synchronously to push the mixed powder in the inner cavity of the furnace body 3. When the mixed powder When the powder is pushed to the top of the inner cavity of the furnace body 3 by the paddle 6, the mixed powder will fall down under the action of gravity, and the mixed powder will be dispersed in the falling process and fall to the bottom of the inner cavity of the furnace body 3 again, and then be pushed by the remaining paddles 6. With the cooperation of multiple paddles 6, the mixed powder can be kept moving to improve the dispersion of the mixed powder, thereby avoiding the situation that part of the material is not fully burned due to the accumulation of the mixed powder, thereby affecting the overall calcination effect; and, because the mixed powder is at the angle between the paddle 6 and the inner cavity of the furnace body 3 when it moves, when the mixed powder accumulates at the angle, it can be The mutual squeezing of the mixed powders may cause part of the mixed powders to be stuck at the angle, and the mixed powders may not fall normally, affecting the dispersion effect of the mixed powders. Therefore, the furnace body 3 rotates intermittently, and when a paddle plate 6 is in the middle position above the furnace body 3 and is in a vertical state, the electric push rod 17 drives the plug block 19 to move and insert it into the plug interface 7, and then the motor three 14 drives the threaded rod one 15 to rotate, so that the lifting plate 16 rises, and the plug block 19 can be used to drive the paddle plate 6 to rise, so that the end surfaces on both sides of the paddle plate 6 are scraped against the edge of the furnace body 3 until the bottom of the paddle plate 6 retracts to the edge of the furnace body 3. , and the paddle 6 does not separate from the furnace body 3. At this time, the paddle 6 and the inner wall of the furnace body 3 no longer form an angle, so that the mixed powder stuck at the angle can fall off, thereby avoiding the situation that when the mixed powder accumulates at the angle between the paddle 6 and the inner wall of the furnace body 3, part of the mixed powder is stuck at the angle due to the mutual squeezing between the mixed powders, and then the mixed powder cannot fall normally, affecting the dispersion effect of the mixed powder. When the powder at the angle falls, the paddle 6 is driven to reset again, and the paddle 6 is positioned by the magnetic block 31 and the furnace body 3 by adsorption, and will not slide into the furnace body 3, and the paddle 6 can continue to work;Moreover, when the mixed powder is placed inside the furnace body 3, if the mixed powder is in a piled-up state, it will cause the mixed powder to fall to the same position every time it drops, and then accumulate at the same position, still resulting in insufficient combustion. Therefore, when the mixed powder is at the included angle between the baffle 6 and the inner wall of the furnace body 3 and is aligned with the flattening column 11, the motor two 12 can be used to drive the rotation of the threaded rod three 29, so that the flattening column 11 slides horizontally to push the mixed powder. The mixed powder higher than the lower end face of the flattening column 11 will collapse and become a flat state, so that the mixed powder can be evenly spread at the included angle between the baffle 6 and the inner wall of the furnace body 3. Then the flattening column 11 resets, and the baffle 6 is further driven to move to push the mixed powder, so that the mixed powder will not concentrate at the same position when it drops, further ensuring the dispersion degree of the mixed powder. Moreover, every time a baffle 6 is driven to rise by the insertion block 19, the flattening column 11 will also move to flatten the mixed powder, ensuring the continuous combustion effect of the mixed powder. Finally, after the combustion reaction is over, the furnace door 4 is opened, and the motor four 23 is used to drive the rotation of the threaded rod two 25, so that the slider 26 can move horizontally and the connecting rod 24 can rotate, thereby causing the furnace body 3 to rotate. When it is necessary to take out the light block obtained by combustion, the furnace body 3 can be driven to tilt, so that the light block slides out of the furnace body 3 under the action of gravity, and the light block obtained by combustion can be collected.

[0068] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A silicon carbide nanowire aerogel calcining furnace, comprising a base (1), characterized in that: An adjustment seat (2) is rotatably provided on the left side of the upper end surface of the base (1); a mounting plate (5) is fixedly connected to the upper right end of the adjustment seat (2); a furnace body (3) is rotatably provided on the left end surface of the mounting plate (5); a furnace door (4) is rotatably provided on one side of the left end of the furnace body (3); a plurality of paddles (6) for pushing the mixed powder are plugged in and slidably provided on the furnace body (3); a magnetic block (31) is provided in the middle of one side of the paddles (6); the magnetic block (31) can be adsorbed on the edge of the furnace body (3); an igniter (28) is fixedly connected to the middle of the right end surface of the mounting plate (5); a flame nozzle (20) of the igniter (28) and the mounting plate (5) penetrate and extend to the inner cavity of the furnace body (3); and an intermittent plug-in lifting mechanism is provided on the mounting plate (5) to prevent the mixed powder from being stuck at the angle between the paddles (6) and the inner wall of the furnace body (3); The intermittent plug-in lifting mechanism comprises a slide rail (30) fixedly connected to the upper side of the left end surface of the mounting plate (5); the slide rail (30) is plugged and slidably connected to a lifting plate (16); two slide bars (18) are slidably connected to the left side of the lifting plate (16); a plug block (19) is fixedly connected to the rear end of the slide bar (18); a plug interface (7) is provided on one side of the dial plate (6); the plug block (19) can be plugged with the plug interface (7); a vacuum pump (27) is fixedly connected to the upper side of the right end surface of the mounting plate (5); an air inlet end of the vacuum pump (27) is connected to an exhaust pipe (22); the exhaust pipe (22) penetrates the mounting plate (5) and extends to the inner cavity of the furnace body (3); an air inlet (21) is penetrated and fixedly connected to one side of the mounting plate (5); and the air inlet (21) extends to the inner cavity of the furnace body (3).

2. The silicon carbide nanowire aerogel calcining furnace according to claim 1, characterized in that: A gear ring (13) is sleeved and fixedly connected to the right side of the furnace body (3); a gear (8) is rotatably arranged in the middle of the front side of the left end face of the mounting plate (5); the gear (8) and the outer ring gear block of the gear ring (13) are meshed with each other; a motor 1 (9) is fixedly connected to the middle of the front side of the right end face of the mounting plate (5); the output end of the motor 1 (9) is fixedly connected to the gear (8).

3. The silicon carbide nanowire aerogel calcining furnace according to claim 1, characterized in that: A motor three (14) is fixedly connected to the upper side of the left end surface of the mounting plate (5); a threaded rod one (15) is fixedly connected to the output end of the motor three (14); both upper and lower ends of the threaded rod one (15) are rotatably arranged on the mounting plate (5); and the threaded rod one (15) is threadedly connected to the right end of the lifting plate (16).

4. The silicon carbide nanowire aerogel calcining furnace according to claim 1, characterized in that: An electric push rod (17) is fixedly connected to the left side of the front end surface of the lifting plate (16), and the piston end of the electric push rod (17) is fixedly connected to the middle part of the front end of the insert block (19).

5. The silicon carbide nanowire aerogel calcining furnace according to claim 1, characterized in that: A flattening column (11) is plugged and slidably connected to one side of the mounting plate (5); a threaded rod three (29) is threadedly connected to the flattening column (11); a mounting rod (10) is rotatably provided at the right end of the threaded rod three (29); and a left end of the mounting rod (10) is fixedly connected to the mounting plate (5).

6. The silicon carbide nanowire aerogel calcining furnace according to claim 5, characterized in that: The right end surface of the mounting rod (10) is fixedly connected to the second motor (12), and the output end of the second motor (12) is fixedly connected to the right end of the third threaded rod (29).

7. The silicon carbide nanowire aerogel calcining furnace according to claim 1, characterized in that: A connecting rod (24) is rotatably provided at the middle of the lower end surface of the adjustment seat (2), a sliding block (26) is rotatably provided at the lower end of the connecting rod (24), and the sliding block (26) is slidably connected to the base (1).

8. The silicon carbide nanowire aerogel calcining furnace according to claim 7, characterized in that: The lower end of the slider (26) is threadedly connected to a second threaded rod (25), both ends of the second threaded rod (25) are rotatably arranged on the base (1), a fourth motor (23) is fixedly connected to the middle of the right end surface of the base (1), and the output end of the fourth motor (23) is fixedly connected to the right end of the second threaded rod (25).

9. A method for preparing silicon carbide nanowire aerogel, characterized in that: The preparation is carried out using the calcining furnace kiln described in any one of claims 1 to 8, comprising the following specific steps: S1. Using anhydrous ethanol as solvent, a certain proportion of silicon powder, polytetrafluoroethylene powder and tungsten powder are mixed uniformly by ball milling; S2, drying and sieving the mixed powder, and then transferring it to the furnace body (3); S3, after evacuating the furnace body (3), filling it with argon gas of a certain pressure, and using an igniter (28) to ignite the mixed powder locally. The high heat released by the combustion reaction and the high gas pressure generated can promote the continuous growth of silicon carbide nanowires, thereby quickly constructing aerogel in three-dimensional space; S4. After the combustion reaction is completed, the light block in the furnace body (3) is taken out and oxidized and decarbonized in air to obtain silicon carbide nanowire aerogel.

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