An apparatus and method for preparing an insulating castable

Abstract

The application relates to the technical field of castable preparation, and discloses super-light high-strength thermal-insulation castable and a preparation method, which comprise a drying machine and a sealing door on the drying machine; first supporting devices and second supporting devices are arranged in the drying machine; the first supporting devices are used for overturning the castable to the second supporting devices; the first supporting devices and the second supporting devices are both provided with air blowing devices for guiding air flow. The first supporting devices are rotated, the first supporting devices drive the castable to rotate, the castable is pushed to the second supporting devices, the lower end surface of the castable is turned to the upper surface when the castable rotates to the second supporting devices, the castable is turned over, the castable can be dried in all directions, and the castable repeatedly hits the first supporting devices and the second supporting devices through repeated turning, so that the stress in the castable is reduced.

Description

Technical Field

[0001] This invention relates to the field of castable preparation technology, specifically to a thermal insulation castable preparation apparatus and preparation method. Background Technology

[0002] Lightweight insulating castables have been widely used in various industrial kilns and burners, but due to the trade-off between insulation, strength, and high-temperature resistance, their bulk density is usually less than 1.20 g / cm³. 3 Lightweight insulating castables are used on the permanent layer of static kilns, with a maximum compressive strength of no more than 5MPa. However, in dynamic kilns, these products have low strength and poor wear resistance, which cannot effectively ensure the safe operation of rotary kilns. Taking cement rotary kilns as an example, in previous years, the outer wall temperature of cement rotary kilns was basically above 350℃, resulting in huge energy loss. In order to reduce the temperature, material manufacturers developed a structure with double-layer composite bricks and insulation panels. However, in order to ensure the safe operation of the kiln, the composite brick insulation layer is mostly made of clay bricks with a bulk density of 1.8-2.0g / cm3, and the outer wall temperature can be controlled at 280℃.

[0003] However, in the final drying step of existing thermal insulation castable preparation equipment, the lightweight thermal insulation castable may crack due to the large thermal stress inside the material during the drying process. Summary of the Invention

[0004] This invention provides a device and method for preparing thermal insulation castables, which solves the problem mentioned in the background art that cracks will appear in the lightweight thermal insulation castables when drying is too slow in the final step due to the large thermal stress inside the lightweight thermal insulation castables.

[0005] The present invention provides the following technical solution: a heat-insulating castable preparation device, including a dryer and a sealed door on the dryer, wherein a first support device and a second support device are installed inside the dryer, the first support device is used to flip the castable to the second support device, and both the first support device and the second support device are equipped with a blowing device for guiding air.

[0006] The blowing device includes an air jet hole disposed on a first support device. A conical column for changing the size of the air jet hole is slidably connected inside the air jet hole. A first push rod is installed at the lower end of the conical column. A cylinder is also installed inside the first support device. A piston is slidably connected inside the cylinder. A circular vent hole is provided on the piston. The first push rod passes through the cylinder and is connected to the piston. A first spring is also installed at the upper end of the cylinder and is connected to the conical column.

[0007] As an optional embodiment of the thermal insulation castable preparation device of the present invention, the first support device includes a base plate and two side plates. Side plates are installed on both sides of the base plate. The air blowing device is installed on the upper end of the base plate. A cold air pipe is installed at one end of the side plate and the cold air pipe is connected to the air blowing device. A sealing disc is slidably connected inside the cylinder. A pin is installed at the upper end of the sealing disc. A first through hole is installed inside the pin, which penetrates the pin and the sealing disc. The pin is used to snap into the inside of the circular vent hole.

[0008] As an optional embodiment of the thermal insulation castable preparation device of the present invention, a guide plate is rotatably connected to the base plate, an L-shaped strip is hinged to one end of the guide plate, the bottom end of the conical column is used to squeeze the L-shaped strip to slide downward, and a second spring is installed at the upper end of the L-shaped strip, the second spring being connected to the base plate.

[0009] As an optional embodiment of the thermal insulation castable preparation device of the present invention, the dryer is further equipped with a hydraulic cylinder, a sealing cover is installed at the lower end of the hydraulic cylinder, a second sealing element is installed at the lower end of the sealing cover, and a first sealing element is installed at the upper end of the base plate. A first sealing cavity is provided between one of the second seals, the first seal, and the side plate, and a second sealing cavity is provided between the other second seal, the first seal, and the side plate.

[0010] As an optional embodiment of the thermal insulation castable preparation device of the present invention, a cover plate is also installed at one end of the side plate, and a second push rod is installed at one end of the cover plate. The cover plate is used to push the castable to squeeze the air inside the first sealing cavity and the second sealing cavity. A second pressure relief valve is provided at the upper end of the sealing cover to discharge the air in the second sealing cavity and the first sealing cavity.

[0011] As an optional solution of the thermal insulation castable preparation device of the present invention, wherein: a second air intake hole and a first air jet hole are respectively provided at one end of the side plate, a first one-way valve is installed inside the second air intake hole, and a second one-way valve is provided inside the first air jet hole. The first one-way valve is used to block air leakage at the second air intake hole, and the second one-way valve is used to block air leakage at the second sealing cavity. A storage box is also installed at one end of the side plate. The storage box is connected to the second air intake and the first air jet. The cold air pipe is attached to the storage box. The storage box is used for heat conduction to the cold air pipe. A first pressure relief valve is installed inside the storage box. The pressure relief value of the first pressure relief valve is the same as that of the second pressure relief valve.

[0012] As an optional embodiment of the thermal insulation castable preparation device of the present invention, wherein: a first short shaft is installed on one side of the first support device, and one end of the first short shaft is connected to a first motor; A second short shaft is installed on one side of the second support device, and one end of the second short shaft is connected to the second motor.

[0013] As an optional embodiment of the thermal insulation castable preparation device of the present invention, wherein: both the second sealing member and the first sealing member include an adjustment groove, a square sleeve is slidably connected inside the adjustment groove, a sealing strip is slidably connected inside the square sleeve, and the sealing strip and the square sleeve are connected by a limiting spring; A return spring is also installed at one end of the square sleeve. A guide post is installed inside the return spring, and the guide post is used to limit the sliding of the first seal and the second seal.

[0014] As an optional embodiment of the thermal insulation castable preparation device of the present invention, a third spring is installed at the lower end of the piston, and the third spring is connected to the sealing disc.

[0015] This invention also provides a method for preparing thermal insulation castable, comprising: S1. Mix 30-50 parts of ceramic fragments, 7-9 parts of mullite, 2-5 parts of silica powder, 10-15 parts of silicon carbide, and 1-3 parts of silicon nitride with the mixed liquid at a mass ratio of 3-6:10. Let stand, remove floating impurities, filter, collect the filter residue, and ball mill the filter residue, calcium hydroxide, and surfactant at a mass ratio of 8-10:3:1. Collect the ball milling material. S2. The ball mill material and mixed particles are put into an extruder at a mass ratio of 4:6 for extrusion. The extruded material is then calcined, crushed, sieved, and the sieved particles are collected. S3. Place the sieved particles and acetone into the reactor at a mass ratio of 8:13, protect with mixed gas, preheat at 65-75°C, then add 8-12% of the mass of the sieved particles of methyltrimethoxysilane, and heat to 205-225°C. S4. By weight, take 75-30 parts of dried material, 4-6 parts of sodium silicate, 3-6 parts of water-reducing agent, and 3-8 parts of binder, stir and mix to obtain semi-finished thermal insulation castable; S5. Place the semi-finished thermal insulation casting material into the first support device 3 and bake for 5 minutes to remove moisture. Then, rotate the first support device 3 to turn the semi-finished thermal insulation casting material over and place the turned semi-finished thermal insulation casting material on the second support device to dry for 5 minutes. Then, repeatedly turn the semi-finished thermal insulation casting material over 4-8 times through the first support device 3 and the second support device to complete the preparation of the thermal insulation casting material.

[0016] The present invention has the following beneficial effects: 1. The thermal insulation castable preparation device and method, by rotating the first support device, causes the castable to rotate and push the castable to the second support device. When the castable rotates to the second support device, the lower end face of the castable will flip to the upper side, thereby realizing the flipping of the castable. This allows the castable to be dried from all directions. Furthermore, by repeatedly flipping, the castable repeatedly hits the first and second support devices, thereby reducing the internal stress of the castable.

[0017] 2. The thermal insulation castable preparation device and method use an L-shaped strip to pull the guide plate to rotate, so that the guide plate changes from a vertical shape to an inclined shape, thereby forming an inclined air channel between the conical column and the guide plate. The inclined air channel better guides the air to be sprayed onto the castable, thereby improving the drying effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of the first support device of the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of the air duct and side plate of the present invention.

[0021] Figure 4 This is a schematic diagram of the overall main cross-sectional structure of the present invention.

[0022] Figure 5 This is a schematic diagram of the structure of the blower device of the present invention.

[0023] In the diagram: 1. Dryer; 2. Sealing door; 3. First support device; 4. Second support device; 5. Hydraulic cylinder; 6. Sealing cover; 7. Blowing device; 8. First seal; 9. Second seal; 10. First short shaft; 11. Second push rod; 12. Cover plate; 13. Castable refractory; 14. First sealing cavity; 15. Second sealing cavity; 16. First spring; 17. L-shaped strip; 18. Second spring; 19. Guide plate; 20. Air duct; 31. Base plate; 32. Air duct; 33. Side plate; 34. First air jet port; 35. First one-way valve; 36. Second one-way valve; 37. First pressure relief valve; 38. Storage tank; 39. Second pressure relief valve; 40. Second air intake port; 71. Air jet port; 72. Conical column; 73. First push rod; 74. Cylinder; 75. Piston; 76. Sealing plate; 77. Insert post; 78. First through hole; 79. Third spring; 80. Round vent hole. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Example 1 Please see Figure 1-5 A heat-insulating castable preparation device includes a dryer 1 and a sealing door 2 on the dryer 1. A first support device 3 and a second support device 4 are installed inside the dryer 1. The first support device 3 is used to flip the castable to the second support device 4. Both the first support device 3 and the second support device 4 are equipped with a blowing device 7 for guiding air. The blowing device 7 includes an air jet hole 71 disposed on the first support device 3. A conical column 72 for changing the size of the air jet hole 71 is slidably connected inside the air jet hole 71. A first push rod 73 is installed at the lower end of the conical column 72. A cylinder 74 is also installed inside the first support device 3. A piston 75 is slidably connected inside the cylinder 74. A circular vent hole 80 is provided on the piston 75. The first push rod 73 passes through the cylinder 74 and is connected to the piston 75. A first spring 16 is also installed at the upper end of the cylinder 74 and is connected to the conical column 72. A third spring 79 is installed at the lower end of the piston 75, and the third spring 79 is connected to the sealing disc 76.

[0026] In the final drying step, existing thermal insulation castable preparation devices may cause cracks in the lightweight thermal insulation castable due to the large thermal stress inside the material. Therefore, the preparation device of the present invention accelerates the drying speed and improves the drying efficiency by repeatedly turning the semi-finished thermal insulation castable by installing the first support device 3 and the second support device 4. Specifically, according to Figure 1 As shown, the casting material 13 is placed on the first support device 3, and then air is sprayed through the jet hole 71 to dry the casting material 13. Then, by rotating the first support device 3, the casting material 13 is rotated and pushed to the second support device 4. When the casting material 13 rotates to the second support device 4, the lower end face of the casting material 13 will flip to the top, thereby turning the casting material 13 over. This allows the casting material 13 to be dried from all directions. By repeatedly turning it over, the casting material 13 repeatedly hits the first support device 3 and the second support device 4, thereby reducing the internal stress of the casting material 13. Increase the spray range: According to Figure 5As shown, when the casting material 13 is rotated from the first support device 3 to the second support device 4, the casting material 13 will hit the conical column 72, causing the conical column 72 to slide downward. The conical column 72 changes the diameter of the air jet 71. As the diameter of the air jet 71 decreases, the air pressure at the air jet 71 increases, which in turn allows the air jet 71 to spray to a farther position on the casting material 13, increasing the spray range and further improving the drying efficiency.

[0027] Example 2 This embodiment is an improvement upon embodiment 1. For details, please refer to [link / reference]. Figure 1-5 The first support device 3 includes a base plate 31 and two side plates 33. The side plates 33 are installed on both sides of the base plate 31. The air blowing device 7 is installed on the upper end of the base plate 31. A cold air pipe 32 is installed on one end of the side plate 33 and is connected to the air blowing device 7. The cylinder 74 is also slidably connected to a sealing disc 76. A pin 77 is installed at the upper end of the sealing disc 76. A first through hole 78 is installed inside the pin 77. The first through hole 78 passes through the pin 77 and the sealing disc 76. The pin 77 is used to snap into the inside of the round vent hole 80.

[0028] Because the castable 13 moves up and down when it is flipped to the first support device 3 and the second support device 4, in order to maintain atmospheric pressure spraying onto the castable 13 for a long time, a cylinder 74 is installed inside the base plate 31. Figure 5 As shown, when the castable 13 is pressed onto the conical column 72, the conical column 72 will push the first push rod 73 and the piston 75 downward to slide downward. Then, when the sealing disc 76 inside the cylinder 74 is engaged with the piston 75, since the diameter of the first through hole 78 is smaller than the diameter of the round vent hole 80, the speed at which the first spring 16 pulls the piston 75 upward will be lower than the speed at which the round vent hole 80 slides downward, thereby achieving the extension of atmospheric pressure injection onto the castable 13. It should be noted that when the castable 13 stabilizes, the conical column 72 will be reset under the push of the first spring 16, and the castable 13 will abut against the upper end of the conical column 72. At this time, the diameter of the air jet 71 is larger, so the air jet 71 can contact the castable 13 over a large area, thereby further improving the drying efficiency.

[0029] Example 3 This embodiment is an improvement upon embodiment 2. For details, please refer to [link / reference]. Figure 1-5 A guide plate 19 is rotatably connected to the base plate 31. An L-shaped strip 17 is hinged to one end of the guide plate 19. The bottom end of the conical column 72 is used to press the L-shaped strip 17 to slide downward. A second spring 18 is also installed at the upper end of the L-shaped strip 17. The second spring 18 is connected to the base plate 31. The dryer 1 is also equipped with a hydraulic cylinder 5. A sealing cover 6 is installed at the lower end of the hydraulic cylinder 5. A second sealing element 9 is installed at the lower end of the sealing cover 6. A first sealing element 8 is installed at the upper end of the base plate 31. A first sealing cavity 14 is provided between one of the second sealing elements 9, the first sealing element 8 and the side plate 33, and a second sealing cavity 15 is provided between the other second sealing element 9, the first sealing element 8 and the side plate 33; Both the second sealing element 9 and the first sealing element 8 include an adjustment groove. A square sleeve is slidably connected inside the adjustment groove. A sealing strip is slidably connected inside the square sleeve. The sealing strip and the square sleeve are connected by a limiting spring. One end of the square sleeve is also equipped with a return spring, and a guide post is installed inside the return spring. The guide post is used to limit the sliding of the first seal 8 and the second seal 9.

[0030] Changing the injection path: When the castable 13 bounces up and down at the conical column 72, the diameter of the jet nozzle 71 decreases, thereby increasing the injection distance and ensuring that atmospheric air always contacts the castable 13. To better guide the air injected by the jet nozzle 71, a rotating guide plate 19 is connected at the base plate 31. Figure 5 As shown, when the conical column 72 slides downward, it will abut against the L-shaped strip 17, causing the conical column 72 to drive the L-shaped strip 17 to slide downward. The L-shaped strip 17 pulls the guide plate 19 to rotate, changing the guide plate 19 from a vertical position to an inclined position. This creates an inclined air channel 20 between the conical column 72 and the guide plate 19, which better guides the air jet to the casting material 13, thereby improving the drying effect. It should be noted that when the castable 13 smoothly contacts the conical column 72, the conical column 72 is reset by the first spring 16, which causes the second spring 18 to pull the L-shaped bar 17 to reset, thereby causing the inclined guide plate 19 to rotate to vertical, and the inclined air channel 20 to turn into a vertical air channel 20. The castable 13 gathers the air, so that the air ejected from the jet hole 71 can be directly sprayed onto the castable 13.

[0031] Example 4 This embodiment is an improvement upon embodiment 3. For details, please refer to [link / reference]. Figure 1-5 A cover plate 12 is also installed at one end of the side plate 33. A second push rod 11 is installed at one end of the cover plate 12. The cover plate 12 is used to push the casting material 13 to squeeze the air inside the first sealing cavity 14 and the second sealing cavity 15. A second pressure relief valve 39 is provided at the upper end of the sealing cover 6 to discharge the air in the second sealing cavity 15 and the first sealing cavity 14. A second air intake hole 40 and a first air jet hole 34 are respectively provided at one end of the side plate 33. A first one-way valve 35 is installed inside the second air intake hole 40, and a second one-way valve 36 is installed inside the first air jet hole 34. The first one-way valve 35 is used to block air leakage at the second air intake hole 40, and the second one-way valve 36 is used to block air leakage at the second sealing cavity 15. A storage box 38 is also installed at one end of the side plate 33. The storage box 38 is connected to the second air intake 40 and the first air jet 34 respectively. The cold air pipe 32 is attached to the storage box 38. The storage box 38 is used for heat conduction to the cold air pipe 32. A first pressure relief valve 37 is installed inside the storage box 38. The pressure relief value of the first pressure relief valve 37 is the same as that of the second pressure relief valve 39.

[0032] Extrusion jet: According to Figure 4 As shown, when the sealing cover 6 slides down to seal the first support device 3, a sealed space is formed between the sealing cover 6 and the interior of the first support device 3. The second sealing element 9 on the sealing cover 6 and the first sealing element 8 on the first support device 3 will abut against the casting material 13, thereby dividing the sealed space into two parts: the first sealing cavity 14 and the second sealing cavity 15. Then, air is sprayed into this space for drying. In order to improve efficiency, the second push rod 11 and the cover plate 12 are pushed to the right by the hydraulic rod outside the dryer 1, and then the casting material 13 is slid to the left by the cover plate 12. Since the first sealing element 8 and the second sealing element 9 can be slidably connected to the sealing cover 6 and the first support device 3, the casting material 13 will continuously squeeze the space in the second sealing cavity 15. The air in the space in the second sealing cavity 15 will be squeezed and compressed and discharged from the second pressure relief valve 39, thereby accelerating the discharge of hot air and facilitating the subsequent entry of cold air. Repetitive cycle: based on Figure 4 As shown, when the casting material 13 compresses the air in the second sealing cavity 15, the first one-way valve 35 is opened by the air compression, allowing air to enter the interior of the storage box 38. Since the cooling pipe 32 is attached to the storage box 38, the heat in the storage box 38 is conducted to the cooling pipe 32, thereby reducing the temperature of the storage box 38. Subsequently, when the air pressure inside the second sealing cavity 15 is compressed to a certain value by the casting material 13, the second pressure relief valve 39 and the first pressure relief valve 37 will open simultaneously, allowing the air inside the storage box 38 to force open the first pressure relief valve 37 and flow upward from the bottom of the casting material 13 again through the first jet hole 34. Then, it is discharged through the second pressure relief valve 39. In this way, the cooled air flows upward from the bottom of the casting material 13 again to circulate and dry the casting material 13, thereby improving the drying efficiency.

[0033] Example 5 This embodiment is an improvement upon embodiment 3. For details, please refer to [link / reference]. Figure 1-5A first short shaft 10 is installed on one side of the first support device 3, and one end of the first short shaft 10 is connected to the first motor. A second short shaft is installed on one side of the second support device 4, and one end of the second short shaft is connected to the second motor.

[0034] Driver: According to Figure 5 As shown, when the casting material 13 is on the first support device 3, the second support device 4 is in a vertical state and perpendicular to the first support device 3. Then, when it is necessary to rotate and flip, the first motor drives the first short shaft 10 to rotate the first support device 3, so that the casting material 13 on the first support device 3 falls onto the second support device 4. Then, the second motor drives the second short shaft to rotate the second support device 4 from a vertical state to be parallel to the dryer 1, thus completing the flipping.

[0035] Example 6 This invention also provides a method for preparing thermal insulation castable, comprising: S1. Mix 30-50 parts of ceramic fragments, 7-9 parts of mullite, 2-5 parts of silica powder, 10-15 parts of silicon carbide, and 1-3 parts of silicon nitride with the mixed liquid at a mass ratio of 3-6:10. Let stand, remove floating impurities, filter, collect the filter residue, and ball mill the filter residue, calcium hydroxide, and surfactant at a mass ratio of 8-10:3:1. Collect the ball milling material. S2. The ball mill material and mixed particles are put into an extruder at a mass ratio of 4:6 for extrusion. The extruded material is then calcined, crushed, sieved, and the sieved particles are collected. S3. Place the sieved particles and acetone into the reactor at a mass ratio of 8:13, protect with mixed gas, preheat at 65-75°C, then add 8-12% of the mass of the sieved particles of methyltrimethoxysilane, and heat to 205-225°C. S4. By weight, take 75-30 parts of dried material, 4-6 parts of sodium silicate, 3-6 parts of water-reducing agent, and 3-8 parts of binder, stir and mix to obtain semi-finished thermal insulation castable; S5. Place the semi-finished thermal insulation casting material into the first support device 3 and bake for 5 minutes to remove moisture. Then, rotate the first support device 3 to turn the semi-finished thermal insulation casting material over and place the turned semi-finished thermal insulation casting material on the second support device to dry for 5 minutes. Then, repeatedly turn the semi-finished thermal insulation casting material over 4-8 times through the first support device 3 and the second support device to complete the preparation of the thermal insulation casting material.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, as is well known to those skilled in the art, the embodiments of this application may additionally include other control mechanisms, drive mechanisms, connection structures, power supplies, and / or auxiliary structures for necessary control and operation, without departing from the spirit of the invention and without structural interference between the structures, and as can be implemented by those skilled in the art.

[0037] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A thermal insulation castable preparation apparatus, comprising a dryer (1) and a sealing door (2) on the dryer (1), characterized in that: The dryer (1) is equipped with a first support device (3) and a second support device (4). The first support device (3) is used to flip the casting material to the second support device (4). Both the first support device (3) and the second support device (4) are equipped with a blower (7) for guiding air. The blowing device (7) includes an air jet hole (71) provided on the first support device (3). A conical column (72) for changing the size of the air jet hole (71) is slidably connected inside the air jet hole (71). A first push rod (73) is installed at the lower end of the conical column (72). A cylinder (74) is also installed inside the first support device (3). A piston (75) is slidably connected inside the cylinder (74). A circular vent hole (80) is provided on the piston (75). The first push rod (73) passes through the cylinder (74) and is connected to the piston (75). A first spring (16) is also installed at the upper end of the cylinder (74). The first spring (16) is connected to the conical column (72). The first support device (3) includes a base plate (31) and two side plates (33). The base plate (31) is equipped with side plates (33) on both sides. The blower (7) is installed on the upper end of the base plate (31). A cold air pipe (32) is installed at one end of the side plate (33). The cold air pipe (32) is connected to the blower (7). The cylinder (74) is also slidably connected to a sealing disc (76). A pin (77) is installed at the upper end of the sealing disc (76). A first through hole (78) is installed inside the pin (77). The first through hole (78) passes through the pin (77) and the sealing disc (76). The pin (77) is used to snap into the inside of the round vent hole (80).

2. The thermal insulation castable preparation apparatus according to claim 1, characterized in that: A guide plate (19) is rotatably connected to the base plate (31). One end of the guide plate (19) is hinged to an L-shaped strip (17). The bottom end of the conical column (72) is used to press the L-shaped strip (17) to slide downward. A second spring (18) is also installed on the upper end of the L-shaped strip (17). The second spring (18) is connected to the base plate (31).

3. The thermal insulation castable preparation apparatus according to claim 2, characterized in that: The dryer (1) is also equipped with a hydraulic cylinder (5), a sealing cover (6) is installed at the lower end of the hydraulic cylinder (5), a second sealing element (9) is installed at the lower end of the sealing cover (6), and a first sealing element (8) is installed at the upper end of the base plate (31). A first sealing cavity (14) is provided between one of the second seal (9), the first seal (8) and the side plate (33), and a second sealing cavity (15) is provided between the other second seal (9), the first seal (8) and the side plate (33).

4. The apparatus for preparing thermal insulation castable according to claim 3, characterized in that: A cover plate (12) is also installed at one end of the side plate (33). A second push rod (11) is installed at one end of the cover plate (12). The cover plate (12) is used to push the casting material (13) to squeeze the air inside the first sealing cavity (14) and the second sealing cavity (15). A second pressure relief valve (39) is provided at the upper end of the sealing cover (6) to discharge the air in the second sealing cavity (15) and the first sealing cavity (14).

5. The thermal insulation castable preparation apparatus according to claim 4, characterized in that: One end of the side plate (33) is provided with a second air intake hole (40) and a first air jet hole (34). A first one-way valve (35) is installed inside the second air intake hole (40), and a second one-way valve (36) is installed inside the first air jet hole (34). The first one-way valve (35) is used to block air leakage at the second air intake hole (40), and the second one-way valve (36) is used to block air leakage at the second sealing cavity (15). A storage box (38) is also installed at one end of the side plate (33). The storage box (38) is connected to the second air intake (40) and the first air jet (34) respectively. The cold air pipe (32) is attached to the storage box (38). The storage box (38) is used for heat conduction to the cold air pipe (32). A first pressure relief valve (37) is installed inside the storage box (38). The pressure relief value of the first pressure relief valve (37) is the same as that of the second pressure relief valve (39).

6. The thermal insulation castable preparation apparatus according to claim 5, characterized in that: A first short shaft (10) is installed on one side of the first support device (3), and one end of the first short shaft (10) is connected to the first motor; A second short shaft is installed on one side of the second support device (4), and one end of the second short shaft is connected to the second motor.

7. The apparatus for preparing thermal insulation castable according to any one of claims 3-6, characterized in that: Both the second sealing element (9) and the first sealing element (8) include an adjustment groove. A square sleeve is slidably connected inside the adjustment groove. A sealing strip is slidably connected inside the square sleeve. The sealing strip and the square sleeve are connected by a limiting spring. A reset spring is also installed at one end of the square sleeve. A guide post is installed inside the reset spring. The guide post is used to limit the sliding of the first seal (8) and the second seal (9).

8. The apparatus for preparing thermal insulation castable according to claim 1, characterized in that: A third spring (79) is installed at the lower end of the piston (75), and the third spring (79) is connected to the sealing disc (76).

9. A method for preparing thermal insulation castable, comprising using the thermal insulation castable preparation apparatus as described in claim 1, characterized in that, The steps include the following: S1. Mix 30-50 parts of ceramic fragments, 7-9 parts of mullite, 2-5 parts of silica powder, 10-15 parts of silicon carbide, and 1-3 parts of silicon nitride with the mixed liquid at a mass ratio of 3-6:

10. Let stand, remove floating impurities, filter, collect the filter residue, and ball mill the filter residue, calcium hydroxide, and surfactant at a mass ratio of 8-10:3:

1. Collect the ball milling material. S2. The ball mill material and mixed particles are put into an extruder at a mass ratio of 4:6 for extrusion. The extruded material is then calcined, crushed, sieved, and the sieved particles are collected. S3. Place the sieved particles and acetone into the reactor at a mass ratio of 8:13, protect with mixed gas, preheat at 65-75°C, then add 8-12% of the mass of the sieved particles of methyltrimethoxysilane, and heat to 205-225°C. S4. By weight, take 75-30 parts of dried material, 4-6 parts of sodium silicate, 3-6 parts of water-reducing agent, and 3-8 parts of binder, stir and mix to obtain semi-finished thermal insulation castable; S5. Place the semi-finished thermal insulation casting material into the first support device (3) and bake for 5 minutes to remove moisture. Then, rotate the first support device (3) to turn the semi-finished thermal insulation casting material over and place the turned semi-finished thermal insulation casting material at the second support device to dry for 5 minutes. Then, turn the semi-finished thermal insulation casting material over repeatedly 4-8 times through the first support device (3) and the second support device to complete the preparation of the thermal insulation casting material.

Images