Firing process of composite ceramic heat insulation particles

Abstract

The invention discloses a sintering process of composite ceramic heat-insulating particles, which is applied to the technical field of ceramic heat-insulating materials and can continuously scrape ceramic particles adhered to the inner wall of a sintering cylinder due to excessive sintering in the sintering process of the ceramic particles in a tunnel kiln. Meanwhile, structures such as a detection soft scraping plate and an alarm cylinder are matched, so that when too many firmly adhered particles appear in the sintering cylinder, a reminding effect can be achieved for workers, the workers are prompted to process and adjust the tunnel kiln equipment and the internal temperature of the tunnel kiln equipment in time, more excessively sintered ceramic particles are prevented from being generated, and the service life of the tunnel kiln equipment is prolonged. And through the cooperative arrangement of the detection soft scraper and the guide rail, the scraped ceramic particles can be collected and transported, the excessively sintered ceramic particles are helped to leave the sintering cylinder, and the influence of the excessively sintered ceramic particles on other ceramic particles is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of ceramic thermal insulation materials, and in particular to a firing process for composite ceramic thermal insulation particles. Background Art

[0002] Composite ceramic insulation particles are made of micron-level sunscreen, silicon dioxide, and nano-level ceramic powders mixed with organic solvents, and then dried in a tunnel kiln to obtain porous spherical particles with a particle size between 1mm and 5mm. They have high strength and low thermal conductivity. When used on building exterior walls, they can achieve 80% energy saving without changing the exterior wall structure.

[0003] In the process of forming ceramic insulation particles, a tunnel kiln is required for drying and sintering. However, once the temperature inside the tunnel kiln is too high, the ceramic insulation particles inside will be over-sintered, causing the ceramic insulation particles to deform and even adhere to the inner wall of the tunnel kiln, making it impossible to take them out. In addition, the over-sintered ceramic insulation particles will also adhere to normal particles, seriously affecting the sintering quality of the ceramic insulation particles.

[0004] Therefore, the applicant proposes a firing process for composite ceramic insulation particles. Summary of the invention

[0005] The purpose of the present application is to solve the problem that the temperature inside the tunnel pit is too high, which will cause the ceramic insulation particles inside to be over-sintered, causing the ceramic insulation particles to deform, and even adhere to the inner wall of the tunnel pit, making it impossible to take them out, and the over-sintered ceramic insulation particles will also adhere to normal particles, seriously affecting the sintering quality of the ceramic insulation particles. Compared with the prior art, a firing process for composite ceramic insulation particles is provided, and a firing process for composite ceramic insulation particles is provided, which includes the following steps:

[0006] S1. Slurry mixing: Select appropriate raw materials, including high temperature stable ceramic powder, stabilizer, sunscreen, silicon dioxide, and nano-grade ceramic powder mixed with organic solvent;

[0007] S2. Granulation equipment: The mixed material is formed into granular insulation material by air flow granulation or drum granulation, with a diameter of 1-5mm;

[0008] S3, high temperature placement: mix the raw materials evenly, and add a certain amount of foaming agent to expand the mixture into porous particles under high temperature conditions;

[0009] S4, drying and sintering: The expanded particles are dried in a tunnel kiln and sintered at high temperature to stabilize them and improve their high temperature resistance.

[0010] During the sintering process of ceramic particles in the tunnel kiln, the ceramic particles adhering to the inner wall of the sintering cylinder due to excessive sintering can be continuously scraped off. At the same time, with the detection soft scraper and alarm tube and other structures, when there are too many firmly adhering particles inside the sintering cylinder, it can serve as a reminder to the staff, prompting the staff to deal with and adjust the tunnel kiln equipment and its internal temperature in time to avoid producing more over-sintered ceramic particles. Through the coordinated setting of the detection soft scraper and the guide rail, the scraped ceramic particles can be collected and transported, helping these over-sintered ceramic particles to leave the sintering cylinder and reducing the influence of over-sintered ceramic particles on other ceramic particles.

[0011] Optionally, the tunnel kiln includes a sintering cylinder, and the sintering cylinder is rotatably connected to the tunnel kiln, a mounting plate is installed inside the sintering cylinder, two sprockets are rotatably connected to the mounting plate, the same chain is sleeved between the two sprockets, a plurality of scraper assemblies are fixedly connected to the chain, a guide rail is provided between the mounting plate and the scraper assembly, two connecting rods are fixedly connected between the guide rail and the mounting plate, a support bar is fixedly connected between the two connecting rods, both ends of the support bar are fixedly connected to the tunnel kiln, and ceramic particles adhering to the inner wall of the sintering cylinder can be scraped clean.

[0012] Optionally, the scraper assembly includes a fixed block fixedly connected to the chain, a scraper is fixedly connected to the fixed block, and the scraper is in contact with the inner wall of the sintering cylinder, so as to scrape off firmly adhered ceramic particles and collect the scraped ceramic particles onto the detection soft scraper.

[0013] Optionally, a soft scraper for detection located at the lower side of the scraper blade is fixedly connected to the scraper assembly, an elastic plate is fixedly connected to the soft scraper for detection, and the elastic plate is in contact with the inner wall of the sintering cylinder, a movable plug is slidably connected inside the fixed block, a pull rope is fixedly connected between the movable plug and the elastic plate, and an elastic rope is fixedly connected between the movable plug and the fixed block. The soft scraper for detection can be used to detect ceramic particles that are more firmly adhered.

[0014] Optionally, a same air storage hose is fixedly connected to multiple scraper assemblies, and the air storage hose is connected to the fixed block, an alarm cylinder is connected to the air storage hose, and a one-way valve is installed between the air storage hose and the alarm cylinder, and a piston is slidably connected inside the alarm cylinder.

[0015] Optionally, a switch button is installed on the inner wall of the piston, a buzzer electrically connected to the switch button is installed on the upper end of the alarm tube, and an exhaust hole is drilled on the side wall of the alarm tube. When a large number of firmly adhered ceramic particles appear inside the sintering tube, it can serve as a reminder to the staff, prompting the staff to deal with it in time to avoid the production of more over-sintered ceramic particles.

[0016] Optionally, a one-way pipe is installed on the fixed block to prevent the inhaled air from being discharged.

[0017] Optionally, the contact end of the detection soft scraper and the fixed block is made of silicone material, and the guide rail is in contact with the lower side wall of the detection soft scraper, which can cause the detection soft scraper to rotate downward to facilitate the falling of ceramic particles.

[0018] Optionally, two leak-proof plates are fixedly connected to the detection soft scraper to prevent the ceramic particles from falling when the detection soft scraper has not reached the end of the guide rail, thereby failing to achieve the purpose of taking the over-sintered ceramic particles out of the sintering cylinder.

[0019] Optionally, a push plate is slidably connected between the two anti-leakage plates to prevent excessively sintered ceramic particles from adhering to the detection soft scraper, thereby playing an effective cleaning role.

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] (1) This solution can continuously scrape away the ceramic particles adhering to the inner wall of the sintering tube due to over-sintering during the sintering process of the ceramic particles in the tunnel kiln. At the same time, with the structures such as the detection soft scraper and the alarm tube, it can remind the staff when there are too many firmly adhering particles inside the sintering tube, prompting the staff to handle and adjust the tunnel kiln equipment and its internal temperature in time to avoid the generation of more over-sintered ceramic particles. In addition, through the coordinated setting of the detection soft scraper and the guide rail, the scraped ceramic particles can be collected and transported, helping these over-sintered ceramic particles to leave the sintering tube and reduce the impact of over-sintered ceramic particles on other ceramic particles.

[0022] (2) The tunnel kiln includes a sintering cylinder, and the sintering cylinder is rotatably connected to the tunnel kiln. A mounting plate is installed inside the sintering cylinder, and two sprockets are rotatably connected to the mounting plate. A same chain is sleeved between the two sprockets, and a plurality of scraper assemblies are fixedly connected to the chain. A guide rail is provided between the mounting plate and the scraper assemblies, and two connecting rods are fixedly connected between the guide rail and the mounting plate. A support bar is fixedly connected between the two connecting rods, and both ends of the support bar are fixedly connected to the tunnel kiln, so as to be able to scrape away the ceramic particles adhering to the inner wall of the sintering cylinder.

[0023] (3) The scraper assembly includes a fixed block fixedly connected to the chain, and a scraper is fixedly connected to the fixed block. The scraper is in contact with the inner wall of the sintering cylinder, and can scrape the firmly adhered ceramic particles and collect the scraped ceramic particles onto the detection soft scraper.

[0024] (4) A soft scraper for detection is fixedly connected to the scraper assembly and is located at the lower side of the scraper blade. An elastic plate is fixedly connected to the soft scraper for detection and the elastic plate is in contact with the inner wall of the sintering tube. A movable plug is slidably connected inside the fixed block. A pull rope is fixedly connected between the movable plug and the elastic plate. An elastic rope is fixedly connected between the movable plug and the fixed block. The soft scraper for detection can be used to detect ceramic particles that are more firmly adhered.

[0025] (5) A plurality of scraper assemblies are fixedly connected with a same air storage hose, which is communicated with a fixed block, an alarm cylinder is communicated with the air storage hose, a one-way valve is installed between the air storage hose and the alarm cylinder, and a piston is slidably connected inside the alarm cylinder.

[0026] (6) A switch button is installed on the inner wall of the piston, and a buzzer electrically connected to the switch button is installed on the upper end of the alarm tube. An exhaust hole is drilled on the side wall of the alarm tube, which can serve as a reminder to the staff when a large number of firmly adhered ceramic particles appear inside the sintering tube, prompting the staff to deal with it in time to avoid the generation of more over-sintered ceramic particles.

[0027] (7) A one-way pipe is installed on the fixed block to prevent the inhaled air from being discharged.

[0028] (8) The contact end of the detection soft scraper and the fixed block is made of silicone material, and the guide rail is in contact with the lower side wall of the detection soft scraper, which can play a role in the downward rotation of the detection soft scraper to facilitate the falling of ceramic particles.

[0029] (9) Two anti-leakage plates are fixedly connected to the detection soft scraper, which can prevent the ceramic particles from falling when the detection soft scraper has not reached the end of the guide rail, thereby failing to achieve the purpose of taking the over-sintered ceramic particles out of the sintering cylinder.

[0030] (10) The two anti-leakage plates are slidably connected with a push plate to prevent over-sintered ceramic particles from adhering to the detection soft scraper, thereby playing an effective cleaning role. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is the process flow chart for this application;

[0032] Figure 2 A diagram showing the state of ceramic particles during sintering for this application;

[0033] Figure 3 This is a schematic diagram of the structure of this application;

[0034] Figure 4 An exploded view of the panel section installed for this application;

[0035] Figure 5 This is a schematic diagram of the main structure of this application;

[0036] Figure 6 This is a schematic diagram of the structure of the scraper assembly of this application;

[0037] Figure 7 This is a state diagram of the elastic plate when deforming in this application;

[0038] Figure 8 This is a state diagram of the scraper of the present application when scraping firmly adhered particles;

[0039] Fig. 9 This is a state diagram of the push plate when pushing out ceramic particles in this application.

[0040] Description of the numbers in the figure:

[0041] 10 tunnel pit, 1 sintering cylinder, 11 mounting plate, 12 sprocket, 13 chain, 14 support bar, 2 scraper assembly, 21 fixed block, 22 detection soft scraper, 23 elastic plate, 24 moving plug, 25 pull rope, 26 air storage hose, 261 alarm cylinder, 262 piston, 263 switch button, 3 guide rail, 31 connecting rod, 4 scraper, 41 leak-proof plate, 42 push plate. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0043] The first implementation method:

[0044] This application discloses a firing process for composite ceramic thermal insulation particles. Figure 1-2 , including the following steps:

[0045] S1. Slurry mixing: Select appropriate raw materials, including high temperature stable ceramic powder, stabilizer, sunscreen, silicon dioxide, and nano-grade ceramic powder mixed with organic solvent;

[0046] S2. Granulation equipment: The mixed material is formed into granular insulation material by air flow granulation or drum granulation, with a diameter of 1-5mm;

[0047] S3, high temperature placement: mix the raw materials evenly, and add a certain amount of foaming agent to expand the mixture into porous particles under high temperature conditions;

[0048] S4, drying and sintering: The expanded particles are dried in a tunnel kiln and sintered at high temperature to stabilize them and improve their high temperature resistance.

[0049] The tunnel kiln 10 includes a sintering cylinder 1, and the sintering cylinder 1 is rotatably connected to the tunnel kiln 10. A mounting plate 11 is installed inside the sintering cylinder 1. Two sprockets 12 are rotatably connected to the mounting plate 11. The same chain 13 is sleeved between the two sprockets 12. A plurality of scraper assemblies 2 are fixedly connected to the chain 13. A guide rail 3 is provided between the mounting plate 11 and the scraper assemblies 2. Two connecting rods 31 are fixedly connected between the guide rail 3 and the mounting plate 11. A support bar 14 is fixedly connected between the two connecting rods 31. Both ends of the support bar 14 are fixedly connected to the tunnel kiln 10.

[0050] When in use, the staff first pours the expanded porous ceramic particles into the tunnel pit 10. Through the rotation of the sintering cylinder 1, the threaded pieces inside the sintering cylinder 1 are used to make the ceramic particles tumble continuously under their own gravity, thereby achieving the function of transmission and uniform sintering. At the same time, the threaded pieces inside the sintering cylinder 1 can drive the scraper assembly 2 to move. When some ceramic particles are bonded to the inner wall of the sintering cylinder 1, such as Figure 2 As shown, by providing the scraper 4, the adhered particles can be scraped off.

[0051] The second implementation method:

[0052] See also Figure 3-5 Compared with the embodiment 1, the present embodiment mainly adds structures such as the detection soft scraper 22 and the alarm cylinder 261, so that when there are too many firmly adhered particles inside the sintering cylinder 1, it can remind the staff and facilitate the staff to deal with it in time. The specific implementation is as follows:

[0053] The scraper assembly 2 includes a fixed block 21 fixedly connected to the chain 13, a scraper 4 is fixedly connected to the fixed block 21, and the scraper 4 is in contact with the inner wall of the sintering cylinder 1, a detection soft scraper 22 located on the lower side of the scraper 4 is fixedly connected to the scraper assembly 2, an elastic plate 23 is fixedly connected to the detection soft scraper 22, and the elastic plate 23 is in contact with the inner wall of the sintering cylinder 1, a moving plug 24 is slidably connected inside the fixed block 21, a pull rope 25 is fixedly connected between the moving plug 24 and the elastic plate 23, an elastic rope is fixedly connected between the moving plug 24 and the fixed block 21, and multiple scraper assemblies 2 are fixedly connected to the same air storage hose 26, and the air storage hose 26 is connected with the fixed block 21, the air storage hose 26 is connected with an alarm tube 261, and a one-way valve is installed between the air storage hose 26 and the alarm tube 261, a piston 262 is slidably connected inside the alarm tube 261, a switch button 263 is installed on the inner wall of the piston 262, a buzzer electrically connected to the switch button 263 is installed on the upper end of the alarm tube 261, an exhaust hole is drilled on the side wall of the alarm tube 261, a one-way tube is installed on the fixed block 21, the contact end of the detection soft scraper 22 and the fixed block 21 is made of silicone material, and the guide rail 3 is in contact with the lower side wall of the detection soft scraper 22.

[0054] See also Figure 6-8 When adhered particles appear, the adhered ceramic particles will first contact the elastic plate 23, and the elastic plate 23 can play a slight scraping role. When the particles are firmly adhered, the elastic plate 23 will be deformed, and then the scraper 4 will play a cleaning role. When multiple elastic plates 23 are deformed, the movable plug 24 will be pulled by the pull rope 25, so that the movable plug 24 will discharge the air into the air storage hose 26. A positive pressure is generated inside the air storage hose 26, which drives the piston 262 to rise. At the same time, some air will be discharged from the exhaust hole of the alarm cylinder 261. When there are more firmly adhered ceramic particles inside the sintering cylinder 1, the amount of air discharged into the air storage hose 26 is greater than the amount discharged from the exhaust hole of the alarm cylinder 261, and the piston 262 will continue to move up, pressing the switch button 263 to trigger the alarm of the buzzer, reminding the staff to deal with it in time.

[0055] See also Fig. 9 Two leak-proof plates 41 are fixedly connected to the detection soft scraper 22 , and a push plate 42 is slidably connected between the two leak-proof plates 41 .

[0056] The ceramic particles scraped off the sintering cylinder 1 by the scraper 4 will fall to the upper side of the detection soft scraper 22. When the detection soft scraper 22 moves to one end of the guide rail 3, since one end of the guide rail 3 is tilted downward, the detection soft scraper 22 tilts downward under gravity, driving the push plate 42 to move downward, pushing out the ceramic particles on the detection soft scraper 22, and helping these over-sintered ceramic particles to leave the sintering cylinder 1 to avoid further sintering. Subsequently, when the detection soft scraper 22 moves to one side of the guide rail 3, the height of the guide rail 3 will cause the detection soft scraper 22 to return to its original position again, and the state of the detection soft scraper 22 when returning will be slightly tilted upward. On the one hand, it can better retain the ceramic particles, and on the other hand, it can cause the push plate 42 to return to its original position for the next use.

[0057] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A firing process for composite ceramic thermal insulation particles, characterized in that: The following steps are involved: S1. Slurry mixing: Select appropriate raw materials, including high temperature stable ceramic powder, stabilizer, sunscreen, silicon dioxide, and nano-grade ceramic powder mixed with organic solvent; S2. Granulation equipment: The mixed material is formed into granular insulation material by air flow granulation or drum granulation, with a diameter of 1-5mm; S3, high temperature placement: mix the raw materials evenly, and add a certain amount of foaming agent to expand the mixture into porous particles under high temperature conditions; S4, drying and sintering: drying the expanded particles in a tunnel kiln (10) and sintering at high temperature to stabilize them and improve their high temperature resistance; The tunnel kiln (10) comprises a sintering cylinder (1), and the sintering cylinder (1) is rotatably connected to the tunnel kiln (10); a mounting plate (11) is installed inside the sintering cylinder (1); two sprocket wheels (12) are rotatably connected to the mounting plate (11); a same chain (13) is sleeved between the two sprocket wheels (12); a plurality of scraper assemblies (2) are fixedly connected to the chain (13); a guide rail (3) is provided between the mounting plate (11) and the scraper assemblies (2); two connecting rods (31) are fixedly connected between the guide rail (3) and the mounting plate (11); a support bar (14) is fixedly connected between the two connecting rods (31); the support bar (14) Both ends are fixedly connected to the tunnel cellar, the scraper assembly (2) comprises a fixed block (21) fixedly connected to the chain (13), a scraper blade (4) is fixedly connected to the fixed block (21), a detection soft scraper blade (22) located at the lower side of the scraper blade (4) is fixedly connected to the scraper assembly (2), an elastic plate (23) is fixedly connected to the detection soft scraper blade (22), and the elastic plate (23) is in contact with the inner wall of the sintering cylinder (1), a movable plug (24) is slidably connected inside the fixed block (21), a pull rope (25) is fixedly connected between the movable plug (24) and the elastic plate (23), and an elastic rope is fixedly connected between the movable plug (24) and the fixed block (21).

2. The firing process of the composite ceramic thermal insulation particles according to claim 1, characterized in that: The scraper assembly (2) is fixedly connected to a detection soft scraper (22) located at the lower side of the scraper (4); the detection soft scraper (22) is fixedly connected to an elastic plate (23), and the elastic plate (23) is in contact with the inner wall of the sintering cylinder (1); a movable plug (24) is slidably connected inside the fixed block (21); a pull rope (25) is fixedly connected between the movable plug (24) and the elastic plate (23); and an elastic rope is fixedly connected between the movable plug (24) and the fixed block (21).

3. The firing process of the composite ceramic thermal insulation particles according to claim 1, characterized in that: The plurality of scraper assemblies (2) are fixedly connected to a same air storage hose (26), and the air storage hose (26) is in communication with the fixed block (21). The air storage hose (26) is in communication with an alarm cylinder (261), and a one-way valve is installed between the air storage hose (26) and the alarm cylinder (261). A piston (262) is slidably connected inside the alarm cylinder (261).

4. The firing process of the composite ceramic thermal insulation particles according to claim 3, characterized in that: A switch button (263) is installed on the inner wall of the piston (262), a buzzer electrically connected to the switch button (263) is installed on the upper end of the alarm tube (261), and an exhaust hole is drilled on the side wall of the alarm tube (261).

5. The firing process of the composite ceramic thermal insulation particles according to claim 1, characterized in that: A one-way pipe is installed on the fixed block (21).

6. The firing process of the composite ceramic thermal insulation particles according to claim 1, characterized in that: The contact end between the detection soft scraper (22) and the fixed block (21) is made of a silicone material, and the guide rail (3) is in contact with the lower side wall of the detection soft scraper (22).

7. The firing process of the composite ceramic thermal insulation particles according to claim 1, characterized in that: Two leakage prevention plates (41) are fixedly connected to the detection soft scraper (22).

8. The firing process of the composite ceramic thermal insulation particles according to claim 7, characterized in that: A common push plate (42) is slidably connected between the two leakage prevention plates (41).

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