Preparation method of SiC@SiO2 nanowire powder and calcination furnace

Abstract

The present invention relates to the technical field of calcination furnaces and kilns, and particularly to a preparation method of SiC@SiO2 nanowire powder and a calcination furnace and kiln. It includes an equipment base, on which a main body of the calcination furnace and kiln is installed. A top frame is fixedly connected to the equipment base. Protective covers are arranged on both sides of the main body of the calcination furnace and kiln. A two-way gas injection seat is fixedly connected to the protective cover. Two adjustable protection mechanisms are fixedly installed on the equipment base. During the preparation process of SiC@SiO2 nanowire powder by the calcination furnace and kiln, by arranging two protective covers, they can cover the outside of the main body of the calcination furnace and kiln, preventing high temperature from harming the operators, effectively isolating the external environment, maintaining the temperature inside the furnace and kiln, promoting uniform heating and reaction of the materials. At the same time, when the equipment and products are naturally cooled after the preparation is completed, the protective covers can be moved away to allow the furnace and kiln to quickly dissipate heat, reducing the internal and external temperatures, which helps to protect the equipment and extend its service life.

Description

Technical Field

[0001] The present invention relates to the technical field of calcination furnaces, and particularly relates to a preparation method of SiC@SiO2 nanowire powder and a calcination furnace. Background Art

[0002] SiC@SiO2 nanowire powder is a composite material composed of silicon carbide (SiC) and silicon dioxide (SiO2), which has excellent physical and chemical properties and is widely used in the fields of electronics, optics, energy, catalysis, etc. Silicon carbide (SiC): is a semiconductor material with high hardness, high thermal conductivity and excellent wear resistance, and is widely used in electronic devices and high-temperature resistant materials.

[0003] Silicon dioxide (SiO2): usually exists in a glass state, has good chemical stability and electrical insulation, and can provide good environmental protection. Composite structure: SiC@SiO2 nanowire powder is composed of SiC nanowires coated with SiO2, combining the excellent electrical conductivity of SiC and the excellent insulation performance of SiO2.

[0004] A calcination furnace is a device used for high-temperature treatment of materials and is widely used in industrial fields such as metallurgy, building materials, ceramics, and chemical engineering. Its main function is to heat raw materials at high temperature to cause physical or chemical changes, so as to obtain the required products.

[0005] During the use of the existing calcination furnace, its outer wall will indeed generate high temperature, and the existing outer wall of the high-temperature furnace lacks protection, resulting in operators being easily burned or scalded when approaching the furnace. Especially in an industrial production environment, there are relatively large safety hazards. At the same time, the high temperature of the outer wall will cause waste of heat and reduce the energy efficiency of the furnace.

[0006] In summary, in the prior art, there is a lack of technology for heat preservation and high-temperature protection of calcination furnaces. Summary of the Invention

[0007] The purpose of the present invention is to solve the deficiencies in the background art and propose a preparation method of SiC@SiO2 nanowire powder and a calcination furnace.

[0008] To achieve the above object, the technical solution adopted by the present invention is: a calcination furnace, including an equipment base, on which a calcination furnace main body is installed, a top frame is fixedly connected to the equipment base, a bidirectional lead screw is rotatably connected to the top frame, adjusting seats are threadedly connected to both ends of the bidirectional lead screw, protective covers are arranged on both sides of the calcination furnace main body, a bidirectional gas injection seat is fixedly connected to the protective cover, and two adjustable protection mechanisms are fixedly installed on the equipment base.

[0009] Preferably, two support frames are fixedly connected to both sides of one end of the top frame, the other end of the support frame is fixedly installed with the equipment base, two fixed racks are symmetrically and fixedly connected to one side of the support frame, and a transmission rack is fixedly connected to the other side of the support frame.

[0010] Preferably, one end of the bidirectional lead screw passes through the top frame and is fixedly connected with a motor, and the motor is fixedly connected with the top frame.

[0011] Preferably, a threaded sleeve is rotatably connected through the adjusting seat, a gear is fixedly connected to the threaded sleeve, and the gear is meshed and driven with the fixed rack.

[0012] Preferably, a threaded rod is fixedly connected to the protective cover, the threaded rod is threadedly connected with the threaded sleeve, a gear shaft is rotatably connected to the protective cover, the gear shaft is in sliding contact with the adjusting seat, and the gear shaft is meshed and driven with the transmission rack.

[0013] Preferably, a heat preservation layer is arranged in the protective cover, a sound insulation layer is fixedly installed in the protective cover, a plurality of sound absorption holes are opened on the inner side of the protective cover, and an adjusting rack is fixedly connected to the bottom of the protective cover.

[0014] Preferably, both ends of the two-way air injection seat are communicated with the inner wall of the protective cover through pipelines, pressure pumping plugs are slidably matched through both ends of the two-way air injection seat, the two pressure pumping plugs are fixedly connected through an adjusting frame, a universal joint is rotatably connected to the two-way air injection seat, a transmission wheel is fixedly connected to one end of the universal joint, the transmission wheel is meshed and driven with the gear shaft, a push rod is fixedly connected to the other end of the universal joint, and the other end of the push rod is in sliding fit with the inner wall of the adjusting frame.

[0015] Preferably, the adjustable protection mechanism includes a bottom frame, the bottom frame is fixedly connected with the equipment base, two connecting rod groups are rotatably connected to the bottom frame, a moving frame is rotatably connected between the other ends of the two connecting rod groups, a plurality of rubber bands are fixedly connected to the bottom of the moving frame, the other ends of the rubber bands are fixedly connected with the bottom frame, a rotating shaft is rotatably connected to one side of the bottom frame, a worm is fixedly connected to the bottom end of the rotating shaft, a worm gear is fixedly connected to the bottom end of one of the connecting rod groups, the worm gear is meshed and driven with the worm, an adjusting wheel is fixedly connected to the top end of the rotating shaft, the adjusting wheel is meshed and driven with the adjusting rack, and a turning handle is fixedly connected to the rotating shaft.

[0016] A preparation method of SiC@SiO2 nanowire powder comprises the following steps:

[0017] S1. First, mix a certain proportion of silicon powder, polytetrafluoroethylene micropowder, and silicon dioxide powder evenly. Then, place the mixed powder in the main body of the calcination furnace kiln for calcination preparation. During the calcination preparation process, two protective covers can cover the main body of the calcination furnace kiln inside to achieve heat preservation and protection.

[0018] S2. After the preparation is completed and natural cooling is required, use the bidirectional lead screw to drive two adjusting seats to move, so that the protective covers move away and move upward, exposing the main body of the calcination furnace kiln, which is convenient for heat dissipation.

[0019] S3. At the same time, during the process of the protective covers moving away, the bidirectional air injection seat will continuously draw in external air and squeeze it into the protective covers to clean the internal structure.

[0020] S4. At the same time, during the process of the protective covers moving away, it will drive the adjustable protection mechanism to unfold, blocking both sides of the main body of the calcination furnace kiln while ensuring the natural cooling of the main body of the calcination furnace kiln, further improving the scald protection effect.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] During the preparation process of SiC@SiO2 nanowire powder by the calcination furnace kiln, by setting two protective covers on the outside of the main body of the calcination furnace kiln, it can prevent high temperature from harming the operators, effectively isolate the external environment, maintain the temperature inside the furnace kiln, promote the uniform heating and reaction of the materials. At the same time, when the equipment and products are naturally cooled after the preparation is completed, the protective covers can be moved away to allow the furnace kiln to dissipate heat quickly, reducing the internal and external temperatures, which helps to protect the equipment and extend its service life.

[0023] At the same time, when the protective covers of the main body of the calcination furnace kiln are moved away after the calcination preparation of SiC@SiO2 nanowire powder, it will drive the adjustable protection mechanism, so that the moving frame drives the rubber belt to unfold, blocking both sides of the main body of the calcination furnace kiln. It can protect the main body of the calcination furnace kiln with residual temperature while ensuring the efficiency of natural cooling of the equipment and products, preventing high-temperature scalding and the impact on the surrounding environment, improving the safety of the working environment. At the same time, during the natural cooling process, the rubber belt will not prevent heat dissipation, ensuring that the equipment and products can effectively cool down.

[0024] By setting the bidirectional air injection seat, it can continuously press air into the protective covers while the protective covers are moving, clean the dust in the sound-absorbing holes, avoid the accumulation of dust or other particles from affecting its sound-absorbing effect, reduce the noise transmission generated inside and outside the furnace kiln, and improve the diversification of the equipment functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1Schematic diagram of the overall structure of a preparation method of SiC@SiO2 nanowire powder and a calcination furnace according to the present invention;

[0026] Figure 2 Schematic diagram of a partial structure of a preparation method of SiC@SiO2 nanowire powder and a calcination furnace according to the present invention;

[0027] Figure 3 Schematic diagram of the top frame structure of a preparation method of SiC@SiO2 nanowire powder and a calcination furnace according to the present invention;

[0028] Figure 4 Schematic diagram of structures such as a bidirectional lead screw of a preparation method of SiC@SiO2 nanowire powder and a calcination furnace according to the present invention;

[0029] Figure 5 Schematic diagram of the adjusting seat structure of a preparation method of SiC@SiO2 nanowire powder and a calcination furnace according to the present invention;

[0030] Figure 6 Schematic cross-sectional view of the protective cover structure of a preparation method of SiC@SiO2 nanowire powder and a calcination furnace according to the present invention;

[0031] Figure 7 Schematic expanded cross-sectional view of the bidirectional gas injection seat structure of a preparation method of SiC@SiO2 nanowire powder and a calcination furnace according to the present invention;

[0032] Figure 8 Schematic diagram of the adjustable protection mechanism structure of a preparation method of SiC@SiO2 nanowire powder and a calcination furnace according to the present invention.

[0033] 1. Equipment base; 2. Calcination furnace main body; 3. Top frame; 4. Bidirectional lead screw; 5. Adjusting seat; 6. Protective cover; 7. Bidirectional gas injection seat; 8. Adjustable protection mechanism; 301. Support frame; 302. Fixed rack; 303. Driving rack; 401. Motor; 501. Threaded sleeve; 502. Gear; 601. Threaded rod; 602. Gear shaft; 603. Thermal insulation layer; 604. Sound insulation layer; 605. Sound absorption hole; 606. Adjusting rack; 701. Pipeline; 702. Suction and pressure plug; 703. Adjusting frame; 704. Universal joint; 705. Driving wheel; 706. Push rod; 801. Bottom frame; 802. Link group; 803. Moving frame; 804. Rubber belt; 805. Rotating shaft; 806. Worm; 807. Worm gear; 808. Adjusting wheel; 809. Rotating handle. Detailed implementation method

[0034] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations.

[0035] As Figures 1-8 shown, a preparation method of SiC@SiO2 nanowire powder and a calcination furnace kiln, including an equipment base 1, a calcination furnace kiln main body 2 is installed on the equipment base 1, a top frame 3 is fixedly connected to the equipment base 1, a bidirectional lead screw 4 is rotatably connected to the top frame 3, adjusting seats 5 are threadedly connected to both ends of the bidirectional lead screw 4, protective covers 6 are arranged on both sides of the calcination furnace kiln main body 2, a bidirectional gas injection seat 7 is fixedly connected to the protective cover 6, and two adjustable protection mechanisms 8 are fixedly installed on the equipment base 1.

[0036] As Figure 3 shown, two support frames 301 are fixedly connected to both sides of one end of the top frame 3, the other ends of the support frames 301 are fixedly installed with the equipment base 1, and two fixed racks 302 are symmetrically and fixedly connected to one side of the support frames 301, and a transmission rack 303 is fixedly connected to the other side of the support frames 301.

[0037] As Figure 4 shown, one end of the bidirectional lead screw 4 passes through the top frame 3 and is fixedly connected with a motor 401, and the motor 401 is fixedly connected with the top frame 3. The connected bidirectional lead screw 4 is driven to rotate by the motor 401, thereby driving the two adjusting seats 5 to move, so that the protective cover 6 is moved away.

[0038] As Figure 5 shown, a threaded sleeve 501 is rotatably connected through the adjusting seat 5, a gear 502 is fixedly connected to the threaded sleeve 501, and the gear 502 is meshed and driven with the fixed rack 302. When the gear 502 on the threaded sleeve 501 is meshed with the fixed rack 302, it will drive the threaded sleeve 501 to rotate, and at this time, it will drive the protective cover 6 connected to the threaded rod 601 to move upward.

[0039] As Figure 6 shown, a threaded rod 601 is fixedly connected to the protective cover 6, the threaded rod 601 is threadedly connected with the threaded sleeve 501, a gear shaft 602 is rotatably connected to the protective cover 6, the gear shaft 602 is in sliding contact with the adjusting seat 5, and the gear shaft 602 is meshed and driven with the transmission rack 303. During the process of moving the protective cover 6 away, under the action of the transmission rack 303, the gear shaft 602 will be driven to rotate.

[0040] A heat preservation layer 603 is arranged inside the protective cover 6, a sound insulation layer 604 is fixedly installed inside the protective cover 6, a plurality of sound absorption holes 605 are opened on the inner side of the protective cover 6, and an adjusting rack 606 is fixedly connected to the bottom of the protective cover 6. The protective cover 6 can cover the calcination furnace kiln main body 2 inside. At this time, under the action of the heat preservation layer 603, heat insulation is carried out on the high-temperature calcination furnace kiln main body 2, and at the same time, the sound absorption holes 605 and the sound insulation layer 604 are used to reduce the noise transmission generated inside and outside the furnace kiln.

[0041] As shown in Figure 7 , both ends of the two-way air injection seat 7 are connected to the inner wall of the protective cover 6 through pipelines 701. Both ends of the two-way air injection seat 7 are provided with suction and pressure plugs 702 in a sliding fit through penetration. A regulating frame 703 is fixedly connected between the two suction and pressure plugs 702. A universal joint 704 is rotatably connected to the two-way air injection seat 7. One end of the universal joint 704 is fixedly connected with a transmission wheel 705. The transmission wheel 705 is meshed and driven with a gear shaft 602. The other end of the universal joint 704 is fixedly connected with a push rod 706. The other end of the push rod 706 is in a sliding fit with the inner wall of the regulating frame 703. Spring-type one-way valves are installed in both the air inlet and outlet ends of the two-way air injection seat 7. The gear shaft 602 drives the transmission wheel 705 to rotate, and then the transmission wheel 705 drives the connected push rod 706 to rotate through the universal joint 704, so that the push rod 706 drives the regulating frame 703 to move reciprocally, so that the regulating frame 703 drives the two suction and pressure plugs 702 to move, thereby sucking external air into the two-way air injection seat 7, and then injecting it into the protective cover 6 through the pipeline 701. The flowing air will be discharged from the sound-absorbing holes 605, thereby cleaning the dust and the like in the sound-absorbing holes 605.

[0042] As shown in Figure 8 , the adjustable protection mechanism 8 includes a chassis 801. The chassis 801 is fixedly connected to the equipment base 1. Two link groups 802 are rotatably connected to the chassis 801. A movable frame 803 is rotatably connected between the other ends of the two link groups 802. A plurality of rubber bands 804 are fixedly connected to the bottom of the movable frame 803. The other ends of the rubber bands 804 are fixedly connected to the chassis 801. A rotating shaft 805 is rotatably connected to one side of the chassis 801. A worm 806 is fixedly connected to the bottom end of the rotating shaft 805. A worm gear 807 is fixedly connected to the bottom end of one of the link groups 802. The worm gear 807 is meshed and driven with the worm 806. An adjusting wheel 808 is fixedly connected to the top end of the rotating shaft 805. The adjusting wheel 808 is meshed and driven with an adjusting rack 606. A turning handle 809 is fixedly connected to the rotating shaft 805. During the process of moving the protective cover 6 away, the adjusting wheel 808 will be driven to rotate through the adjusting rack 606, so that the adjusting wheel 808 drives the worm 806 connected to the rotating shaft 805 to rotate, so that the worm 806 drives the link group 802 connected to the worm gear 807 to rotate. Cooperating with the other link group 802 will drive the movable frame 803 to move upward, unfold the rubber bands 804, and block both sides of the main body 2 of the calcining furnace while ensuring the natural cooling of the main body 2 of the calcining furnace.

[0043] A preparation method of SiC@SiO2 nanowire powder, comprising the following steps:

[0044] S1. First, mix a certain proportion of silicon powder, polytetrafluoroethylene micropowder, and silicon dioxide powder evenly. Then, place the mixed powder in the main body 2 of the calcination furnace kiln for calcination preparation. During the calcination preparation process, the two protective covers 6 can cover the main body 2 of the calcination furnace kiln inside to achieve heat preservation and protection.

[0045] S2. After the preparation is completed and natural cooling is required, use the bidirectional lead screw 4 to drive the two adjusting seats 5 to move, so that the protective covers 6 move away and move upward, exposing the main body 2 of the calcination furnace kiln, which is convenient for heat dissipation.

[0046] S3. At the same time, during the process of the protective cover 6 moving away, the bidirectional air injection seat 7 will continuously suck external air into and squeeze it into the protective cover 6 to clean the internal structure.

[0047] S4. At the same time, during the process of the protective cover 6 moving away, it will drive the adjustable protection mechanism 8 to expand, blocking both sides of the main body 2 of the calcination furnace kiln while ensuring the natural cooling of the main body 2 of the calcination furnace kiln, further improving the scald protection effect.

[0048] Working principle: First, mix a certain proportion of silicon powder, polytetrafluoroethylene micropowder, and silicon dioxide powder evenly. Then, place the mixed powder in the main body 2 of the calcination furnace kiln for calcination preparation. During the calcination preparation process, the two protective covers 6 can cover the main body 2 of the calcination furnace kiln inside. At this time, under the action of the heat preservation layer 603, heat insulation is carried out on the high-temperature main body 2 of the calcination furnace kiln. At the same time, the sound absorption holes 605 and the sound insulation layer 604 can reduce the noise transmission generated inside and outside the furnace kiln.

[0049] After the preparation is completed and natural cooling is required, use the motor 401 to drive the connected bidirectional lead screw 4 to rotate, which will drive the two adjusting seats 5 to move, so that the protective cover 6 moves away. Then, when the gear 502 on the threaded sleeve 501 meshes with the fixed rack 302, it will drive the threaded sleeve 501 to rotate. At this time, it will drive the protective cover 6 connected to the threaded rod 601 to move upward, exposing the main body 2 of the calcination furnace kiln, which is convenient for heat dissipation.

[0050] At the same time, during the process of the protective cover 6 moving away, under the action of the transmission rack 303, the gear shaft 602 will rotate. Then, the gear shaft 602 will drive the transmission wheel 705 to rotate. Then, the transmission wheel 705 will drive the connected push rod 706 to rotate through the universal joint 704, so that the push rod 706 will drive the adjustment frame 703 to move reciprocally, making the adjustment frame 703 drive the two suction and pressure pistons 702 to move, thereby sucking external air into the bidirectional air injection seat 7 and then injecting it into the protective cover 6 through the pipeline 701. The flowing air will be discharged from the sound absorption holes 605, thereby cleaning the dust and the like in the sound absorption holes 605.

[0051] Meanwhile, during the process of moving the protective cover 6 away, the adjusting rack 606 will be driven to rotate the adjusting wheel 808, so that the adjusting wheel 808 drives the worm 806 connected to the rotating shaft 805 to rotate, and the worm 806 drives the connecting rod group 802 connected to the worm gear 807 to rotate. Cooperating with another connecting rod group 802, the moving frame 803 is driven to move upward, and the rubber belt 804 is unfolded, blocking both sides of the main body 2 of the calcination furnace while ensuring the natural cooling of the main body 2 of the calcination furnace, further improving the scald protection effect.

[0052] The foregoing has shown and described 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. What is described in the above embodiments and the specification is only the principle 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 all these changes and improvements fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A calcining furnace, comprising an equipment base (1), characterized in that: A calcining furnace body (2) is mounted on the equipment base (1); a top frame (3) is fixedly connected to the equipment base (1); a bidirectional screw rod (4) is rotatably connected to the top frame (3); an adjustment seat (5) is threadedly connected to both ends of the bidirectional screw rod (4); a threaded sleeve (501) is rotatably connected to the adjustment seat (5); a gear (502) is fixedly connected to the threaded sleeve (501); the gear (502) is meshed with a fixed rack (302) for transmission; protective covers (6) are provided on both sides of the calcining furnace body (2); a threaded rod (601) is fixedly connected to the protective cover (6); the threaded rod (601) is threadedly connected to the threaded sleeve (501) The protective cover (6) is provided with a gear shaft (602) rotatably connected thereto, the gear shaft (602) is provided in sliding contact with the adjustment seat (5), a heat-insulating layer (603) is provided inside the protective cover (6), a sound-insulating layer (604) is fixedly installed inside the protective cover (6), a plurality of sound-absorbing holes (605) are provided on the inner side of the protective cover (6), an adjustment rack (606) is fixedly connected to the bottom of the protective cover (6), a two-way gas injection seat (7) is fixedly connected thereto, both ends of the two-way gas injection seat (7) are connected to the inner wall of the protective cover (6) through a pipe (701), both ends of the two-way gas injection seat (7) are penetrated by a suction plug (702) which is slidably matched therewith, and the two suction plugs (702) are connected and fixedly arranged by an adjustment frame (703), a universal joint (704) is rotatably connected to the bidirectional gas injection seat (7), one end of the universal joint (704) is connected and fixedly arranged with a transmission wheel (705), the transmission wheel (705) is meshed with the gear shaft (602) for transmission, the other end of the universal joint (704) is connected and fixedly arranged with a push rod (706), the other end of the push rod (706) is slidably matched with the inner wall of the adjustment frame (703), two adjustable protection mechanisms (8) are installed and fixedly arranged on the device base (1), the adjustable protection mechanism (8) includes a base frame (801), the base frame (801) is connected and fixedly arranged with the device base (1), the base frame (80 1) Two connecting rod groups (802) are rotatably connected on the upper side, a moving frame (803) is rotatably connected between the other ends of the two connecting rod groups (802), a plurality of rubber belts (804) are connected and fixedly arranged at the bottom of the moving frame (803), the other ends of the rubber belts (804) are connected and fixedly arranged to the bottom of the bottom frame (801), a rotating shaft (805) is rotatably connected to one side of the bottom frame (801), a worm (806) is connected and fixedly arranged at the bottom end of the rotating shaft (805), a worm wheel (807) is connected and fixedly arranged at the bottom end of one of the connecting rod groups (802), the worm wheel (807) is meshed with the worm (806) for transmission, and an adjusting wheel (808) is connected and fixedly arranged at the top end of the rotating shaft (805),The adjusting wheel (808) is meshed with the adjusting rack (606) for transmission, and a turning handle (809) is fixedly connected to the rotating shaft (805).

2. A calcining furnace according to claim 1, characterized in that: Two support frames (301) are connected and fixedly arranged on both sides of one end of the top frame (3); the other end of the support frame (301) is fixedly installed on the equipment base (1); one side of the support frame (301) is connected and fixedly arranged with two fixed racks (302) in a symmetrical structure; the other side of the support frame (301) is connected and fixedly arranged with a transmission rack (303); the transmission rack (303) is meshed with a gear shaft (602) for transmission.

3. A calcining furnace according to claim 1, characterized in that: One end of the bidirectional screw rod (4) passes through the top frame (3) and is connected and fixedly provided with a motor (401); the motor (401) is connected and fixedly provided with the top frame (3).

4. A method for preparing SiC@SiO2 nanowire powder, using a calcining furnace as claimed in any one of claims 1 to 3, characterized in that: The following steps are involved: S1. First, a certain proportion of silicon powder, polytetrafluoroethylene powder and silicon dioxide powder are mixed evenly, and then the mixed powder is placed in a calcining furnace body (2) for calcining. During the calcining process, two protective covers (6) can cover the calcining furnace body (2) inside to achieve heat preservation and protection; S2. After the preparation is completed, when natural cooling is required, the two adjustment seats (5) are driven to move by the bidirectional screw rod (4), so that the protective cover (6) is removed and moved upward, so that the calcining furnace body (2) is exposed to the outside to facilitate heat dissipation; S3. While the protective cover (6) is being removed, the bidirectional air injection seat (7) continuously draws in and squeezes the external air into the protective cover (6) to clean the internal structure thereof; S4. At the same time, when the protective cover (6) is removed, the adjustable protective mechanism (8) is driven to expand, thereby blocking both sides of the calcining furnace body (2) while ensuring the natural cooling of the calcining furnace body (2), thereby further improving the scalding protection effect.

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