Preparation method of SiC-coated SiO2 nanowire powder and calcining furnace

Abstract

The invention relates to the technical field of calcining furnaces, in particular to a preparation method of SiC-coated SiO2 nanowire powder and a calcining kilne.The calcining furnace comprises an equipment base, a calcining furnace body is installed on the equipment base, a top frame is fixedly connected to the equipment base, protective covers are arranged on the two sides of the calcining furnace body, and the protective covers are arranged on the top frame. The two-way gas injection seat is fixedly connected to the protective covers, the two adjustable protective mechanisms are fixedly mounted on the equipment base, and in the process of preparing SiC-coated SiO2 nanowire powder by the calcining furnace, the two protective covers can cover the outer side of a calcining furnace body, so that operators are prevented from being hurt by high temperature, the external environment can be effectively isolated, and the service life of the calcining furnace is prolonged. The temperature inside the furnace kiln is kept, uniform heating and reaction of materials are promoted, meanwhile, when equipment and products are naturally cooled after preparation is completed, the protective cover can be moved away, the furnace kiln can rapidly dissipate heat, the internal temperature and the external temperature are reduced, equipment protection is facilitated, and the service life is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of calcining furnaces, and in particular to a preparation method of SiC@SiO2 nanowire powder and a calcining 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 electronics, optics, energy, catalysis, etc. Silicon carbide (SiC): It is a semiconductor material with high hardness, high thermal conductivity and excellent wear resistance, which is widely used in electronic devices and high temperature resistant materials.

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

[0004] Calcining furnace is a kind of equipment used for high temperature processing of materials, which is widely used in metallurgy, building materials, ceramics, chemical industry and other industrial fields. Its main function is to heat the raw materials at high temperature to make them undergo physical or chemical changes, so as to obtain the desired products.

[0005] During use, the outer wall of the existing calcining furnace will indeed generate high temperature, and the outer wall of the existing high-temperature furnace lacks protection, which makes it easy for operators to be burned or scalded when approaching the furnace. Especially in industrial production environments, there are great safety hazards. At the same time, the high temperature of the outer wall will lead to heat waste and reduce the energy efficiency of the furnace.

[0006] In summary, the prior art lacks the technology for heat preservation and high temperature protection of calcining furnaces. Summary of the invention

[0007] The purpose of the present invention is to solve the shortcomings of the background technology and propose a preparation method and calcining furnace for SiC@SiO2 nanowire powder.

[0008] In order to achieve the above objectives, the technical solution adopted by the present invention is: a calcining furnace kiln, comprising an equipment base, a calcining furnace kiln main body is installed on the equipment base, a top frame is fixedly connected to the equipment base, a bidirectional screw rod is rotatably connected to the top frame, adjustment seats are threadedly connected at both ends of the bidirectional screw rod, protective covers are provided on both sides of the calcining furnace kiln main body, a bidirectional gas injection seat is fixedly connected to the protective cover, and two adjustable protective mechanisms are fixedly installed on the equipment base.

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

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

[0011] Preferably, a threaded sleeve is rotatably connected to the adjustment seat, a gear is fixedly connected to the threaded sleeve, and the gear is meshed with a fixed rack for transmission.

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

[0013] Preferably, a heat-insulating layer is provided in the protective cover, a sound-insulating layer is fixedly installed in the protective cover, a plurality of sound-absorbing 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 gas injection seat are connected to the inner wall of the protective cover through a pipeline, and both ends of the two-way gas injection seat are penetrated by a suction plug that is slidably matched. The two suction plugs are connected and fixed by an adjusting frame, and a universal joint is rotatably provided on the two-way gas injection seat, one end of the universal joint is connected and fixedly provided with a transmission wheel, and the transmission wheel is meshed with the gear shaft for transmission, and the other end of the universal joint is connected and fixedly provided with a push rod, and the other end of the push rod is slidably matched with the inner wall of the adjusting frame.

[0015] Preferably, the adjustable protection mechanism includes a base frame, which is fixedly connected to the base of the equipment, and two connecting rod groups are rotatably connected to the base frame, and a mobile frame is rotatably connected between the other ends of the two connecting rod groups, and a plurality of rubber belts are connected and fixedly provided at the bottom of the mobile frame, and the other end of the rubber belt is fixedly connected to the base frame, and a rotating shaft is rotatably connected to one side of the base frame, and a worm is fixedly provided at the bottom end of the rotating shaft, and a worm is fixedly provided at the bottom end of one of the connecting rod groups, and the worm wheel is meshingly transmitted with the worm, and an adjusting wheel is fixedly provided on the top end of the rotating shaft, and the adjusting wheel is meshingly transmitted with an adjusting rack, and a turning handle is fixedly provided on the rotating shaft.

[0016] A method for preparing SiC@SiO2 nanowire powder comprises the following steps: 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 the main body of the calcining furnace for calcination preparation. During the calcination preparation process, two protective covers can cover the main body of the calcining furnace inside to achieve heat preservation and protection; S2. After the preparation is completed, when natural cooling is required, the two adjustment seats are driven to move by the bidirectional screw rod, so that the protective cover is removed and moved upward, so that the main body of the calcining furnace is exposed to the outside for heat dissipation; S3. When the protective cover is removed, the two-way air injection seat will continuously draw in and squeeze the external air into the protective cover to clean the internal structure. S4. At the same time, when the protective cover is removed, the adjustable protective mechanism will be driven to expand, so that the adjustable protective mechanism can block both sides of the calcining furnace body while ensuring the natural cooling of the calcining furnace body, thereby further improving the scalding protection effect.

[0017] Compared with the prior art, the present invention has the following beneficial effects: During the preparation process of SiC@SiO2 nanowire powder in the calcining furnace, two protective covers can be set to cover the outside of the calcining furnace body to prevent high temperature from causing harm to operators. It can also effectively isolate the external environment, maintain the temperature inside the furnace, and promote uniform heating and reaction of materials. At the same time, when the equipment and products are naturally cooled after preparation, the protective cover can be removed to allow the furnace to quickly dissipate heat, reduce the internal and external temperatures, and help protect the equipment and extend its service life. At the same time, when the calcining furnace body is finished calcining the SiC@SiO2 nanowire powder and the protective cover is removed, the adjustable protective mechanism will be driven, so that the mobile frame drives the rubber belt to unfold and block the two sides of the calcining furnace body. While ensuring the efficiency of natural cooling of equipment and products, the calcining furnace body with residual temperature can be protected to prevent high temperature burns and the impact on the surrounding environment, thereby improving the safety of the working environment. At the same time, during the natural cooling process, the rubber belt will not hinder the dissipation of heat, ensuring that the equipment and products can be effectively cooled; By setting up a two-way air injection seat, air can be continuously pressed into the protective cover while the protective cover moves to clean the dust in the sound-absorbing holes, avoiding the accumulation of dust or other particles that affect the sound absorption effect, thereby reducing the noise propagation generated inside and outside the furnace and improving the functional diversity of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the overall structure of a method for preparing SiC@SiO2 nanowire powder and a calcining furnace of the present invention; Figure 2It is a partial structural schematic diagram of a method for preparing SiC@SiO2 nanowire powder and a calcining furnace of the present invention; Figure 3 A schematic diagram of a method for preparing SiC@SiO2 nanowire powder and a top frame structure of a calcining furnace kiln according to the present invention; Figure 4 It is a schematic diagram of the structure of a method for preparing SiC@SiO2 nanowire powder and a bidirectional screw rod of a calcining furnace and kiln of the present invention; Figure 5 A schematic diagram of a method for preparing SiC@SiO2 nanowire powder and a structure of an adjustment seat of a calcining furnace of the present invention; Figure 6 A schematic cross-sectional view of a method for preparing SiC@SiO2 nanowire powder and a protective cover structure of a calcining furnace of the present invention; Figure 7 It is a cross-sectional expansion schematic diagram of a method for preparing SiC@SiO2 nanowire powder and a bidirectional gas injection seat structure of a calcining furnace of the present invention; Figure 8 The present invention is a method for preparing SiC@SiO2 nanowire powder and a schematic diagram of the structure of an adjustable protection mechanism of a calcining furnace.

[0019] 1. Equipment base; 2. Calcining furnace kiln body; 3. Top frame; 4. Bidirectional screw rod; 5. Adjustment seat; 6. Protective cover; 7. Bidirectional gas injection seat; 8. Adjustable protection mechanism; 301. Support frame; 302. Fixed rack; 303. Transmission rack; 401. Motor; 501. Threaded sleeve; 502. Gear; 601. Threaded rod; 602. Gear shaft; 603. Insulation layer; 604. Sound insulation layer; 605. Sound-absorbing hole; 606. Adjustment rack; 701. Pipeline; 702. Pumping plug; 703. Adjustment frame; 704. Universal joint; 705. Transmission wheel; 706. Push rod; 801. Base frame; 802. Connecting rod group; 803. Moving frame; 804. Rubber belt; 805. Rotating shaft; 806. Worm; 807. Worm wheel; 808. Adjustment wheel; 809. Turning handle. DETAILED DESCRIPTION

[0020] 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 described below are only examples, and those skilled in the art may think of other obvious variations.

[0021] like Figure 1-Figure 8A preparation method of SiC@SiO2 nanowire powder and a calcining furnace are shown, comprising an equipment base 1, a calcining furnace body 2 is installed 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, and adjustment seats 5 are threadedly connected at both ends of the bidirectional screw rod 4, protective covers 6 are arranged on both sides of the calcining furnace body 2, a bidirectional gas injection seat 7 is fixedly connected to the protective cover 6, and two adjustable protective mechanisms 8 are fixedly installed on the equipment base 1.

[0022] like Figure 3 As shown, two support frames 301 are connected and fixedly arranged on both sides of one end of the top frame 3, and the other end of the support frame 301 is installed and fixedly arranged 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, and the other side of the support frame 301 is connected and fixedly arranged with a transmission rack 303.

[0023] like Figure 4 As shown, one end of the bidirectional screw rod 4 passes through the top frame 3 and is connected and fixedly provided with a motor 401, and the motor 401 is connected and fixedly provided with the top frame 3. The motor 401 is used to drive the connected bidirectional screw rod 4 to rotate, thereby driving the two adjustment seats 5 to move, so that the protective cover 6 is removed.

[0024] like Figure 5 As shown, a threaded sleeve 501 is provided on the adjusting seat 5 for rotational connection, a gear 502 is fixedly provided on the threaded sleeve 501, and the gear 502 is meshed with the fixed rack 302 for transmission. When the gear 502 on the threaded sleeve 501 is meshed with the fixed rack 302, the threaded sleeve 501 is driven to rotate, and at this time, the protective cover 6 connected to the threaded rod 601 is driven to move upward.

[0025] like Figure 6 As shown, the protective cover 6 is connected and fixed with a threaded rod 601, which is threadedly connected with the threaded sleeve 501, and the protective cover 6 is rotatably connected with a gear shaft 602, which is in sliding contact with the adjustment seat 5, and the gear shaft 602 is meshed and transmitted with the transmission rack 303. When the protective cover 6 is removed, the gear shaft 602 rotates under the action of the transmission rack 303.

[0026] A heat preservation layer 603 is provided 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 provided inside the protective cover 6, and an adjustment rack 606 is fixedly connected to the bottom of the protective cover 6. The protective cover 6 can cover the calcining furnace body 2 inside, and at this time, the high-temperature calcining furnace body 2 is heat-insulated under the action of the heat preservation layer 603, and the sound absorption holes 605 and the sound insulation layer 604 can reduce the propagation of noise generated inside and outside the furnace.

[0027] like Figure 7As shown, both ends of the two-way gas injection seat 7 are connected to the inner wall of the protective cover 6 through a pipeline 701, and both ends of the two-way gas injection seat 7 are penetrated by a suction and pressure plug 702 that is slidably matched. The two suction and pressure plugs 702 are connected and fixedly arranged through an adjustment frame 703. A universal joint 704 is rotatably connected and arranged on the two-way gas injection seat 7. A transmission wheel 705 is connected and fixedly arranged at one end of the universal joint 704. The transmission wheel 705 is meshed and transmitted with the gear shaft 602. A push rod 706 is connected and fixedly arranged at the other end of the universal joint 704. The other end of the push rod 706 is slidably matched with the inner wall of the adjustment frame 703. Spring-type one-way valves are installed in the air inlet and outlet ends of the two-way gas injection seat 7. The gear shaft 602 will drive the transmission wheel 705 to rotate, and 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 back and forth, so that the adjustment frame 703 drives the two suction and pressure plugs 702 to move, thereby sucking the external air into the two-way air injection seat 7, and then injecting it into the protective cover 6 through the pipe 701, and the flowing air will be discharged from the sound absorption hole 605, thereby cleaning the dust and the like in the sound absorption hole 605.

[0028] like Figure 8 As shown, the adjustable protection mechanism 8 includes a base frame 801, which is fixedly connected to the equipment base 1, and two connecting rod groups 802 are rotatably connected on the base frame 801. A mobile frame 803 is rotatably connected between the other ends of the two connecting rod groups 802. A plurality of rubber belts 804 are fixedly connected to the bottom of the mobile frame 803, and the other end of the rubber belt 804 is fixedly connected to the base frame 801. A rotating shaft 805 is rotatably connected to one side of the base frame 801, and 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 connecting rod groups 802, and the worm gear 807 is meshingly transmitted with the worm 806. An adjusting wheel 808 is fixedly connected to the top of the rotating shaft 805, and the adjusting wheel 808 is meshingly transmitted with the adjusting rack 606. A turning handle 809 is fixedly connected to the rotating shaft 805. During the process of removing the protective cover 6, the adjusting rack 606 will drive the adjusting wheel 808 to rotate, 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 connecting rod group 802 connected to the worm wheel 807 to rotate, and cooperates with another connecting rod group 802 to drive the moving frame 803 to move upward, and unfold the rubber belt 804, so as to block both sides of the calcining furnace kiln body 2 while ensuring the natural cooling of the calcining furnace kiln body 2.

[0029] A method for preparing SiC@SiO2 nanowire powder comprises the following steps: 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 the calcining furnace body 2 for calcining preparation. During the calcining preparation 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 for heat dissipation; S3. When the protective cover 6 is removed, the two-way gas injection seat 7 continuously draws in and squeezes the external air into the protective cover 6 to clean the internal structure thereof; S4. 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.

[0030] Working principle: First, a certain proportion of silicon powder, polytetrafluoroethylene powder and silicon dioxide powder are mixed evenly, and then the mixed powder is placed in the calcining furnace body 2 for calcining preparation. During the calcining preparation process, two protective covers 6 can cover the calcining furnace body 2 inside. At this time, the high-temperature calcining furnace body 2 is insulated by the heat insulation layer 603, and the sound absorbing holes 605 and the sound insulation layer 604 can reduce the transmission of noise generated inside and outside the furnace; After the preparation is completed, when natural cooling is required, the motor 401 is used to drive the connected bidirectional screw rod 4 to rotate, thereby driving the two adjustment seats 5 to move, so that the protective cover 6 is removed, and then when the gear 502 on the threaded sleeve 501 is engaged with the fixed rack 302, the threaded sleeve 501 is driven to rotate, and at this time, the protective cover 6 connected to the threaded rod 601 is driven to move upward, so that the calcining furnace kiln body 2 is exposed to the outside, which is convenient for heat dissipation; At the same time, when the protective cover 6 is removed, the gear shaft 602 will rotate under the action of the transmission rack 303, and then the gear shaft 602 will drive the transmission wheel 705 to rotate, and 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 back and forth, so that the adjustment frame 703 drives the two pumping and pressure plugs 702 to move, so that the external air is sucked into the two-way gas injection seat 7, and then injected into the protective cover 6 through the pipeline 701, and the flowing air will be discharged from the sound absorption hole 605, so as to clean the dust and the like in the sound absorption hole 605; At the same time, when the protective cover 6 is removed, the adjusting wheel 808 will be driven to rotate by adjusting the 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 connecting rod group 802 connected to the worm wheel 807 to rotate, and cooperates with another connecting rod group 802 to drive the moving frame 803 to move upward, and unfold the rubber belt 804, while ensuring the natural cooling of the calcining furnace kiln body 2, it blocks both sides of the calcining furnace kiln body 2, thereby further improving the scalding protection effect.

[0031] 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 to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached 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); adjustment seats (5) are threadedly connected to both ends of the bidirectional screw rod (4); protective covers (6) are arranged on both sides of the calcining furnace body (2); a bidirectional gas injection seat (7) is fixedly connected to the protective cover (6); and two adjustable protective mechanisms (8) are fixedly mounted on the equipment base (1).

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 installed and fixedly arranged 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; and the other side of the support frame (301) is connected and fixedly arranged with a transmission rack (303).

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. The calcining furnace according to claim 1, characterized in that: A threaded sleeve (501) is provided on the adjustment seat (5) for rotational connection, a gear (502) is fixedly provided on the threaded sleeve (501), and the gear (502) is meshed with the fixed rack (302) for transmission.

5. The calcining furnace according to claim 1, characterized in that: A threaded rod (601) is fixedly connected to the protective cover (6), the threaded rod (601) is threadedly connected to 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 adjustment seat (5), and the gear shaft (602) is meshed with the transmission rack (303) for transmission.

6. The calcining furnace according to claim 1, characterized in that: A heat-insulating layer (603) is provided in the protective cover (6), a sound-insulating layer (604) is fixedly installed in the protective cover (6), a plurality of sound-absorbing holes (605) are provided 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).

7. The calcining furnace according to claim 1, characterized in that: Both ends of the two-way gas injection seat (7) are connected to the inner wall of the protective cover (6) through a pipeline (701), and both ends of the two-way gas injection seat (7) are penetrated by a suction plug (702) that is slidably matched. The two suction plugs (702) are connected and fixedly arranged by an adjustment frame (703). A universal joint (704) is rotatably connected to the two-way gas injection seat (7), and one end of the universal joint (704) is connected and fixedly arranged with a transmission wheel (705), and 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), and the other end of the push rod (706) is slidably matched with the inner wall of the adjustment frame (703).

8. The calcining furnace according to claim 1, characterized in that: The adjustable protection mechanism (8) comprises a base frame (801), the base frame (801) is connected and fixed to the equipment base (1), two connecting rod groups (802) are rotatably connected to the base frame (801), a movable 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 fixed to the bottom of the movable frame (803), the other ends of the rubber belts (804) are connected and fixed to the base frame (801), and one side of the base frame (801) A rotating shaft (805) is rotatably connected, and a worm (806) is fixedly connected to the bottom end of the rotating shaft (805); a worm wheel (807) is fixedly connected to the bottom end of one of the connecting rod groups (802); the worm wheel (807) is meshingly connected with the worm (806) for transmission; an adjusting wheel (808) is fixedly connected to the top end of the rotating shaft (805); the adjusting wheel (808) is meshingly connected with the adjusting rack (606) for transmission; and a turning handle (809) is fixedly connected to the rotating shaft (805).

9. A method for preparing SiC@SiO2 nanowire powder, using a calcining furnace as claimed in any one of claims 1 to 8, 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.

Images