A lightweight high temperature resistant fire resistant fiberboard and its preparation method and preparation equipment

Abstract

The present invention discloses a light-weight, high-temperature-resistant and fire-resistant fiberboard and a preparation method and preparation equipment thereof, and relates to the technical field of building materials. The preparation equipment includes mechanical and automated fiberboard forming equipment, an oven, a high-temperature calcining furnace and post-processing equipment. The raw materials for producing the light-weight, high-temperature-resistant and fire-resistant fiberboard are processed by the mechanical and automated fiberboard forming equipment, the oven, the high-temperature calcining furnace and the post-processing equipment in sequence to prepare the light-weight, high-temperature-resistant and fire-resistant fiberboard. The light-weight, high-temperature-resistant and fire-resistant fiberboard of the present invention has a flat, white and smooth appearance, light density, low thermal conductivity, excellent mechanical strength and structural strength, stable high-temperature performance, low shrinkage and low thermal conductivity, and can make the product energy saving reach more than 35%-65%, and can be widely used in various high-temperature industrial kilns, fireproof and heat insulation, military and aerospace hot surface insulation, mechanical and metallurgical heat treatment furnaces and other industrial kilns, hot surface linings, high-temperature experimental furnaces, and hot surface linings of vacuum furnaces.

Description

Technical Field

[0001] The invention relates to the technical field of building materials, and in particular to a lightweight high-temperature-resistant and fire-resistant fiberboard and a preparation method and preparation equipment thereof. Background Art

[0002] Refractory materials are essential basic materials for high temperature technology industries. The development of important pillar industries of the national economy, such as the building materials industry, steel industry, non-ferrous metal smelting industry, machinery industry, chemical industry, high-tech industry (aviation, thermonuclear reactors), etc., is inseparable from the development of the refractory industry. The quality, physical and chemical properties and application technology of refractory materials not only directly affect the product quality of the downstream refractory industries (research and development of clean steel refractory materials, research and development of non-aluminum refractory materials, etc.), production costs, output, and economic benefits, but sometimes also cause personal safety problems for workers. Therefore, the development of the refractory industry is also an important industry for the development of the national economy.

[0003] In recent years, lightweight refractory insulation materials have developed rapidly. They are a kind of refractory materials with high porosity, low bulk density and low thermal conductivity. According to the bulk density, they are divided into lightweight bricks (bulk density 0.4-1.3g / cm3) and ultra-light bricks (<0.4g / cm3). According to the use temperature, they are divided into low-temperature insulation materials (600-900℃), medium-temperature insulation materials (900-1200℃) and high-temperature insulation materials (>1200℃). According to the shape of the product, they are divided into shaped lightweight refractory materials and unshaped lightweight refractory materials. According to the material, they are divided into clay, high alumina, mullite, silica, corundum mullite and alumina hollow spheres. The use of lightweight refractory materials can save fuel, improve thermal efficiency, reduce ambient temperature, reduce furnace weight and improve the working environment.

[0004] Lightweight fire-resistant insulation fiberboard has certain strength and hardness, strong wind erosion resistance, stable high temperature performance, high compressive strength under high temperature conditions, and is often used as a thermal insulation material for high temperature equipment. Existing fire-resistant fiberboard preparation is mostly done manually from material mixing, conveying, and molding, which requires manufacturers to pay a lot of manpower costs, and there are many errors in manual operation, resulting in low dimensional accuracy of the final product and poor energy-saving effect. Summary of the invention

[0005] To this end, the present invention provides a lightweight high temperature resistant fire resistant fiberboard and a preparation method and preparation equipment thereof, so as to solve the problems of low product size accuracy, poor energy saving effect, high labor cost, etc. in the existing lightweight fire resistant thermal insulation fiberboard preparation by manual operation.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] According to the first aspect of the present invention, a preparation device for a lightweight, high-temperature, fire-resistant fiberboard is provided, characterized in that the preparation equipment comprises mechanically automated fiberboard forming equipment, an oven, a high-temperature calcining furnace and post-processing equipment, and the raw materials for producing the lightweight, high-temperature, fire-resistant fiberboard are sequentially processed by the mechanically automated fiberboard forming equipment, an oven, a high-temperature calcining furnace and post-processing equipment to be prepared into the lightweight, high-temperature, fire-resistant fiberboard.

[0008] Furthermore, when the fiberboard produced is non-standard, the fiberboard forming equipment includes multiple first electric mixing barrels, first material storage barrels, four-column hydraulic presses, water storage barrels, and return water barrels, wherein several of the first electric mixing barrels are connected to the first material storage barrel through a first material delivery pipe, and the other several of the first electric mixing barrels are connected to the four-column hydraulic press through a second material delivery pipe, and the water storage barrel and the return water barrel are respectively connected to the first electric mixing barrel.

[0009] Furthermore, the fiberboard forming equipment also includes a vacuum filtration device, which is connected to the four-column hydraulic press; the vacuum filtration device includes a first vacuum pump and multiple first negative pressure air storage tanks, and the first vacuum pump is connected to the first negative pressure air storage tank; each of the first negative pressure air storage tanks is provided with a vacuum suction pipe at the upper end, and a water pump is provided in the first negative pressure air storage tank, and the water pump is connected to the return water bucket through a first return water pipe; the vacuum suction pipe is connected to the barrel of the four-column hydraulic press.

[0010] Furthermore, when the fiberboard produced is of standard type, the fiberboard forming equipment includes multiple second electric mixing barrels, second material storage barrels, vacuum forming machines, high-pressure water pumps, second vacuum pumps, and screw air compressors. The bottom of the second electric mixing barrel is connected to the second material storage barrel. A high-pressure water pump is arranged in the second material storage barrel. The high-pressure water pump is connected to the barrel of the vacuum forming machine through a third material delivery pipe. The vacuum forming machine is respectively connected to the second vacuum pump and the screw air compressor; a water-gas separator and a second negative pressure air storage tank are connected in sequence between the vacuum forming machine and the second vacuum pump; a positive pressure air storage tank is connected between the vacuum forming machine and the screw air compressor; the water-gas separator is connected to the second electric mixing barrel through a second return water pipe.

[0011] Furthermore, the oven includes a box body and an oven controller, the box body is provided with the oven controller; a plurality of independent baking chambers are provided in the box body, the top of the baking chamber is connected with a steam pipe, a thermocouple is provided in the baking chamber, a cooling fan and a cooling plate are provided near the door of the baking chamber; a steam valve is provided in the steam pipe; the thermocouple, the steam valve, the cooling fan and the cooling plate are all connected to the oven controller circuit.

[0012] Furthermore, the high-temperature calcining furnace includes a furnace body and a calcining furnace controller, wherein the calcining furnace controller is arranged in the furnace body; a heating silicon carbon rod is arranged in the furnace body, and the heating silicon carbon rod is connected to the calcining furnace controller circuit.

[0013] According to a second aspect of the present invention, a method for preparing a lightweight high temperature resistant and fire resistant fiberboard is provided, wherein the method adopts the above-mentioned preparation equipment, and the method comprises the following steps:

[0014] When the fiberboard to be produced is non-standard, 70-90 parts by weight of fiber cotton, 0.5-12 parts of silica sol, 0.3-15 parts of α-alumina micropowder, and 2-6 parts of industrial deformed starch are weighed and put into the first electric stirring barrel of the mechanical automated fiberboard forming equipment. The water in the water storage barrel of the mechanical automated fiberboard forming equipment enters the first electric stirring barrel through a pipeline, and the first electric stirring barrel is turned on and stirred for more than 35 minutes to obtain a first mixture; the first mixture is transported to the first storage barrel and the barrel of the four-column hydraulic press through the first feeding pipe and the second feeding pipe respectively; the vacuum suction pipe of the vacuum suction filter device is inserted into the mold in the barrel of the four-column hydraulic press, and the first vacuum pump is turned on. The water in the mold is first sucked into the first negative pressure gas storage tank, and then pumped to the return water barrel through the first return water pipe under the action of the water pump to supply the first electric stirring barrel for recycling; the first mixture entering the barrel mold of the four-column hydraulic press is formed into the first fiberboard after hot pressing;

[0015] When the fiberboard to be produced is of standard type, 70-90 parts by weight of fiber cotton, 0.5-12 parts of silica sol, 0.3-15 parts of α-alumina micropowder, 2-6 parts of industrial deformed starch and water are weighed and put into the second electric stirring barrel of the mechanical automated fiberboard forming equipment, and the second electric stirring barrel is turned on and stirred for more than 35 minutes to obtain a second mixture; the second mixture is conveyed to the barrel of the vacuum forming machine through the third feeding pipe by a high-pressure water pump, and the second vacuum pump, the screw air compressor and the vacuum forming machine are turned on. The water in the barrel of the vacuum forming machine is first sucked into the water-gas separator, and then returned to the second electric stirring barrel through the second return pipe for recycling. The second mixture is formed to form a second fiberboard.

[0016] Furthermore, in the production process of the fiberboard, the amount of water added is 10-20 times the sum of the weight of the fiber wool, silica sol, α-alumina powder, and industrial deformed starch.

[0017] Furthermore, the preparation method further comprises the following steps:

[0018] The first fiberboard or the second fiberboard is transported to the oven by a trolley and dried at 120° C. so that the dryness of the first fiberboard or the second fiberboard reaches more than 95%;

[0019] The dried first fiberboard or the second fiberboard is transported to the high-temperature calcining furnace by a trolley and calcined at 800° C. to 1400° C. for 10 to 14 hours;

[0020] The calcined first fiberboard or the second fiberboard is ground and cut by the post-processing equipment, and processed into various products according to the required product precision.

[0021] Furthermore, the fiber cotton is selected from 1260℃ type fiber cotton, 1400℃ type fiber cotton, 1430℃ type fiber cotton, 1600℃ type fiber cotton, and 1700℃ type fiber cotton.

[0022] According to a third aspect of the present invention, a lightweight, high temperature resistant and fire resistant fiberboard is provided, wherein the fiberboard is prepared by the above-mentioned preparation method.

[0023] The present invention has the following advantages:

[0024] The preparation equipment of the lightweight high-temperature resistant and fire-resistant fiberboard of the present invention adopts mechanized operation, which is beneficial to reducing labor costs, controlling the production quality of the fiberboard, and further beneficial to controlling product costs and improving the competitiveness of products in the market.

[0025] The fiberboard forming equipment in the light-weight high-temperature-resistant and fire-resistant fiberboard preparation equipment of the present invention can effectively recycle the water generated in the fiberboard forming process and reuse it in the fiberboard material preparation process through reasonable settings, thereby reducing the waste of water in the forming process.

[0026] The preparation method of the lightweight high-temperature resistant and fire-resistant fiberboard of the present invention is simple to operate. It adopts mechanized operation to process polycrystalline mullite fiber, alumina fiber and ceramic fiber into fiber product special-shaped parts of any shape through special process. New materials for application in various different industries can be produced, such as fiber flat plates, fiber products, fiber special-shaped parts, fiber felts, fiber furnaces, fiber prefabricated blocks and other lightweight energy-saving, high-temperature resistant, fireproof and heat-insulating insulation materials for various thermal equipment. The product has stable high-temperature performance, has the characteristics of low thermal conductivity, low shrinkage, low density and the like, and can achieve the effect of high-temperature resistance, heat preservation and energy saving.

[0027] The lightweight high-temperature resistant fire-resistant fiberboard of the present invention has a flat, white and smooth appearance, light density, low thermal conductivity, excellent mechanical strength and structural strength, stable high-temperature performance, low shrinkage rate and low thermal conductivity, and can provide high, medium and low temperature lightweight energy-saving refractory materials below 1800°C, which can make the product energy saving reach more than 35%-65%. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0029] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0030] Figure 1 A schematic structural diagram of a fiberboard forming device provided by the present invention 1;

[0031] Figure 2 A schematic diagram of the structure of an oven provided by the present invention 1;

[0032] Figure 3 A schematic structural diagram of a high-temperature calcining furnace provided by the present invention 1;

[0033] Figure 4 A schematic structural diagram of a fiberboard forming device provided by the present invention 2;

[0034] In the figure: a first electric mixing barrel 1, a first material storage barrel 2, a four-column hydraulic press 3, a water storage barrel 4, a water return barrel 5, a first material delivery pipe 6, a second material delivery pipe 7, a first vacuum pump 8, a first negative pressure gas storage tank 9, a main first negative pressure gas storage tank 91, a sub-first negative pressure gas storage tank 92, a water pump 10, a first water return pipe 11, a barrel 12, a trolley 13, a silica sol storage barrel 14, an industrial deformed starch pre-dissolving barrel 15, a second electric mixing barrel 16, a second material storage barrel Barrel 17, vacuum forming machine 18, high-pressure water pump 19, second vacuum pump 20, screw air compressor 21, third feed pipe 22, water-gas separator 23, second negative pressure gas storage tank 24, positive pressure gas storage tank 25, second return water pipe 26, box body 27, drying chamber 270, steam pipe 28, electric thermocouple 29, cooling fan 30, steam valve 31, furnace body 32, heating silicon carbon rod 33, heat sink 34, upper pressing plate 35, lower pressing plate mold 36. DETAILED DESCRIPTION

[0035] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] The sources of the raw materials involved in the following examples are as follows:

[0037] Silica Sol Deqing Nengcheng Crystal Fiber Co., Ltd. Product Model GS-30

[0038] α-alumina powder Zhengzhou Yufa Fine Ceramics Technology Co., Ltd. Product model RA3G

[0039] Industrial Deformed Starch Foshan Nanhai Huahao Huafeng Starch Co., Ltd. Product Model Y-CD Example 1

[0040] A preparation device for a lightweight, high-temperature, fire-resistant fiberboard, which is suitable for producing non-standard fiberboards with inconsistent size standards, includes a mechanical and automated fiberboard forming device, an oven, a high-temperature calcining furnace, and a post-processing device. The raw materials for producing the lightweight, high-temperature, fire-resistant fiberboard are processed by the mechanical and automated fiberboard forming device, the oven, the high-temperature calcining furnace, and the post-processing device in sequence to prepare the lightweight, high-temperature, fire-resistant fiberboard. Each individual device of the preparation device adopts mechanized operation, which is conducive to reducing labor costs, controlling the production quality of the fiberboard, and further facilitating the control of product costs and improving the competitiveness of the product in the market.

[0041] like Figure 1 As shown, the fiberboard forming equipment is arranged on a three-layer platform, and the platform is provided with stairs for operators to walk. The fiberboard forming equipment includes five first electric mixing barrels 1, four first material storage barrels 2, a four-column hydraulic press 3, three water storage barrels 4, and two water return barrels 5. The three water storage barrels 4 and the two water return barrels 5 are arranged on the top layer of the platform, and the five first electric mixing barrels 1 are installed on the middle platform. The middle platform is also provided with a silica sol storage barrel 14 and an industrial deformed starch pre-dissolving barrel 15, wherein the four first electric mixing barrels 1 are connected to the first material storage barrel 2 through the first material delivery pipe 6, and one first electric mixing barrel 1 is connected to the four-column hydraulic press 3 through the second material delivery pipe 7, and the water storage barrel 4 and the water return barrel 5 are respectively connected to the first electric mixing barrel 1. The raw materials and water for producing fiberboard are added to the first electric mixing barrel 1 for sufficient stirring reaction. After successful stirring, the large fiberboard reaction material enters the barrel mold of the four-column hydraulic press 3, and the small fiberboard reaction material enters the first material storage barrel 2, and then the fiberboard is formed by pressing or vacuum suction filtration.

[0042] The fiberboard forming equipment also includes a vacuum suction filter device, which is connected to the four-column hydraulic press 3; the vacuum suction filter device includes a first vacuum pump 8 and four first negative pressure gas storage tanks 9, the four first negative pressure gas storage tanks 9 include a main first negative pressure gas storage tank 91 and three sub-first negative pressure gas storage tanks 92, and the first vacuum pump 8 is connected to the first negative pressure gas storage tank 9; each first negative pressure gas storage tank 9 is provided with a vacuum suction pipe at the upper end, and a water pump 10 is provided in the first negative pressure gas storage tank 9, and the water pump 10 is connected to the return water bucket 5 through the first return water pipe 11; the vacuum suction pipe is connected to the barrel 12 of the four-column hydraulic press 3. The vacuum suction pipe is inserted into the barrel 12 mold of the four-column hydraulic press 3 through the vacuum suction filter device, and the first vacuum pump 8 is turned on to suck the water in the mold into the first negative pressure gas storage tank 9, and then the water in the first negative pressure gas storage tank 9 is pumped back to the return water bucket 5 through the action of the water pump 10 for the next reaction.

[0043] The fiberboard forming equipment can effectively recycle the water generated in the fiberboard forming process and reuse it in the preparation process of the fiberboard material through reasonable settings, thereby reducing the waste of water in the forming process.

[0044] like Figure 2 As shown, the oven includes a box body 27 and an oven controller, wherein the box body is provided with an oven controller; the box body 27 is provided with a plurality of independent drying chambers 270, the top of the drying chamber 270 is connected with a steam pipe 28, the drying chamber 270 is provided with an electric thermocouple 29, and the place of the drying chamber 270 near the door is provided with a cooling fan 30 and a heat sink 34; the steam pipe 28 is provided with a steam valve 31; the electric thermocouple 29, the steam valve 31, the cooling fan 30, and the heat sink 34 are all connected to the circuit of the oven controller. The oven is mainly heated by steam, the steam main pipe enters the steam cylinder for distribution, and is transported to the box body 27 through the steam pipe by the steam valve 31, and the hot air is evenly circulated in the oven by using a circulating fan to make the temperature in the oven uniform, and the oven is automatically controlled by an electric temperature controller and a steam valve 31.

[0045] like Figure 3 As shown, the high temperature calcining furnace comprises a furnace body 32 and a calcining furnace controller, wherein the calcining furnace controller is arranged in the furnace body; a heating silicon carbon rod 33 is arranged in the furnace body 32, and the heating silicon carbon rod 33 is connected to the calcining furnace controller circuit. The high temperature calcining furnace is fully automatically controlled.

[0046] Example 2

[0047] The present embodiment is a preparation device for a lightweight high temperature resistant and fire resistant fiberboard. Except for the following differences between the fiberboard forming device and the embodiment 1, other technical schemes are the same as the embodiment 1. The preparation device is suitable for producing standard fiberboards with uniform sizes:

[0048] like Figure 4 As shown, the fiberboard forming equipment includes a plurality of second electric mixing barrels 16, a second material storage barrel 17, a vacuum forming machine 18, a high-pressure water pump 19, a second vacuum pump 20, and a screw air compressor 21. The bottom of the second electric mixing barrel 16 is connected to the second material storage barrel 17. A high-pressure water pump 19 is arranged in the second material storage barrel 17. The high-pressure water pump 19 is connected to the barrel of the vacuum forming machine 18 through a third material delivery pipe 22. The vacuum forming machine 18 is respectively connected to the second vacuum pump 20 and the screw air compressor 21; a water-gas separator 23 and a second negative pressure air storage tank 24 are connected in sequence between the vacuum forming machine 18 and the second vacuum pump 20; a positive pressure air storage tank 25 is connected between the vacuum forming machine 18 and the screw air compressor 21; the water-gas separator 23 is connected to the second electric mixing barrel 16 through a second return water pipe 26. The reaction material in the barrel mold of the vacuum forming machine 18 is vacuum filtered by the second vacuum pump 20, and the water in the mold is pumped into the water-gas separator 23. The water in the water-gas separator 23 is recovered into the second electric stirring barrel 16 for reuse.

[0049] Example 3

[0050] A lightweight, high-temperature-resistant and fire-resistant fiberboard is prepared from the following raw materials in parts by weight: 75 parts of fiber cotton, 10 parts of silica sol, 11 parts of α-alumina micropowder, and 4 parts of industrial deformed starch; the fiber cotton is selected from 1400°C type fiber cotton.

[0051] The preparation method of the fiberboard comprises the following steps:

[0052] Weigh 75 parts of fiber cotton, 10 parts of silica sol, 11 parts of α-alumina powder, and 4 parts of industrial deformed starch by weight, pre-dissolve the industrial deformed starch into a paste with part of water in an industrial deformed starch pre-dissolving barrel 15, and put the silica sol into a silica sol storage barrel 14 for standby use;

[0053] Add the fiber cotton crushed by the cotton shredder, α-alumina powder, prepared silica sol and paste-like industrial deformed starch solution into the first electric mixing barrel 1, let 1000-2000 parts of water in the water storage barrel 4 enter the first electric mixing barrel 1 through a pipeline, start the first electric mixing barrel 1 for stirring (stirring speed 800-1400 rpm, temperature is room temperature) for 35 minutes to obtain a first mixture; transport the first mixture to the first storage barrel 2 and the barrel 12 of the four-column hydraulic press 3 through the first feeding pipe 6 and the second feeding pipe 7 respectively; insert the vacuum suction pipe of the vacuum suction filter device into the mold in the barrel 12 of the four-column hydraulic press, start the first vacuum pump 8, the water in the mold is first sucked into the first negative pressure gas storage tank 9, and then pumped to the return water barrel 5 through the first return water pipe 11 under the action of the water pump 10 to supply the first electric mixing barrel 1 for recycling; the first mixture entering the mold of the barrel 12 of the four-column hydraulic press is formed into a first fiberboard after hot pressing;

[0054] The first fiberboard is transported to the oven by the trolley 13 and dried at 120° C. so that the dryness of the first fiberboard reaches more than 95%;

[0055] The dried first fiberboard is transported to the high temperature calcining furnace by a trolley 13 and calcined at 800°C-1400°C for 12 hours to make the product shrinkage rate within 0.05%, thereby making the product tensile strength stronger and achieving environmentally friendly inorganic materials;

[0056] The calcined first fiberboard is ground and cut by the post-processing equipment, and processed into products according to the required product accuracy. The dust generated during the product processing is collected by the dust collecting equipment.

[0057] Example 4

[0058] A lightweight, high-temperature-resistant and fire-resistant fiberboard is prepared from the following raw materials in parts by weight: 90 parts of fiber cotton, 0.5 parts of silica sol, 0.3 parts of α-alumina micropowder, and 4 parts of industrial deformed starch; the fiber cotton is selected from 1260℃ type fiber cotton.

[0059] The preparation method of the fiberboard comprises the following steps:

[0060] 90 parts of fiber cotton, 0.5 parts of silica sol, 0.3 parts of α-alumina powder, 4 parts of industrial deformed starch and 950-1500 parts of water are weighed and put into the second electric stirring barrel 16, and the second electric stirring barrel 16 is turned on and stirred (stirring speed is 800-1400 rpm, temperature is room temperature) for 45 minutes to fully melt and absorb the fiber and alumina to obtain a second mixture; the second mixture is conveyed to the barrel of the vacuum forming machine 18 through the third feed pipe 22 by the high-pressure water pump 19, the second vacuum pump 20 and the screw air compressor 21 are turned on, and the forming mode button of the vacuum forming machine 18 is turned on, and the water in the barrel of the vacuum forming machine 18 is first sucked into the water-gas separator, and then returned to the second electric stirring barrel 16 through the second return pipe for circulation. In use, the second mixture forms a second fiberboard under the action of vacuum; after the molding is completed according to the time set by the program, the lower pressing plate mold 36 of the vacuum forming machine 18 rises automatically, and is quickly lifted up at the moment of contact with the upper pressing plate 35 to squeeze the second fiberboard, and at the same time, the upper pressing plate 35 is converted into a vacuum mode, and the lower pressing plate mold 36 is converted from a vacuum mode to an air pressure mode to eject the second fiberboard, and the second fiberboard is adsorbed on the upper plate. At this time, a drying plate is placed on the plate receiving frame and enters the vacuum forming machine (below the upper pressing plate 35) under the push of air pressure. The upper pressing plate 35 is converted from a vacuum mode to an air pressure mode, and the second fiberboard falls on the drying plate. The plate receiving frame returns to the origin, and the drying plate and the second fiberboard enter the roller conveyor 26 and enter the trolley 13. There is a lift under the trolley to control the height so that the drying plate can be placed in the trolley 13.

[0061] The second fiberboard is transported to the oven by the trolley 13 and dried at 120° C. to make the dryness of the first fiberboard or the second fiberboard reach more than 95%;

[0062] The dried second fiberboard is transported to the high-temperature calcining furnace by a trolley and calcined at 1350° C. for 12 hours to reduce the shrinkage rate of the product to less than 0.05%, thereby increasing the tensile strength of the product and achieving environmentally friendly inorganic materials;

[0063] The calcined second fiberboard is ground and cut by the post-processing equipment, and processed into products according to the required product accuracy. The dust generated during the product processing is collected by the dust collecting equipment.

[0064] Example 5

[0065] A lightweight, high-temperature-resistant and fire-resistant fiberboard is prepared from the following raw materials in parts by weight: 70 parts of fiber cotton, 12 parts of silica sol, 15 parts of α-alumina micropowder, and 2 parts of industrial deformed starch; the fiber cotton is selected from 1430℃ type fiber cotton.

[0066] The preparation method of the fiberboard is the same as that of Example 3.

[0067] Example 6

[0068] A lightweight, high-temperature-resistant and fire-resistant fiberboard is prepared from the following raw materials in parts by weight: 80 parts of fiber cotton, 8 parts of silica sol, 9 parts of α-alumina micropowder, and 6 parts of industrial deformed starch; the fiber cotton is selected from 1600°C fiber cotton.

[0069] The preparation method of the fiberboard is the same as that of Example 4.

[0070] The fiberboards obtained in Examples 3-6 were sent to the National Refractory Material Quality Supervision and Inspection Center for testing, and the test reports obtained are shown in Table 1.

[0071]

[0072] It is observed that the fiberboard prepared by the present invention has a flat, white and smooth appearance. It can be seen from the results in Table 1 that the fiberboard prepared by the present invention has a light density, low thermal conductivity, excellent mechanical strength and structural strength, stable high temperature performance, low shrinkage and low thermal conductivity, which can make the product energy-saving reach more than 35%-65%, and can be widely used in various high-temperature industrial kiln fireproofing and insulation, military and aerospace hot surface insulation, mechanical and metallurgical heat treatment furnaces and other industrial kiln hot surface linings, high temperature experimental furnaces, and hot surface lining inner tanks of vacuum furnaces.

[0073] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A preparation device for lightweight high temperature resistant and fire resistant fiberboard, It is characterized in that The preparation equipment includes a mechanical automated fiberboard forming equipment, an oven, a high-temperature calcining furnace and a post-processing equipment. The raw materials for producing the lightweight high-temperature resistant and fire-resistant fiberboard are processed in sequence by the mechanical automated fiberboard forming equipment, the oven, the high-temperature calcining furnace and the post-processing equipment to prepare the lightweight high-temperature resistant and fire-resistant fiberboard. The oven comprises a box body (27) and an oven controller, wherein the box body is provided with the oven controller; a plurality of independent drying chambers (270) are provided in the box body (27); the top of the drying chamber (270) is connected with a steam pipe (28); a thermocouple (29) is provided in the drying chamber (270); a heat dissipation fan (30) and a heat dissipation plate (34) are provided near the door of the drying chamber (270); a steam valve (31) is provided in the steam pipe (28); the thermocouple (29), the steam valve (31), the heat dissipation fan (30) and the heat dissipation plate (34) are all connected to the circuit of the oven controller; The high-temperature calcining furnace comprises a furnace body (32) and a calcining furnace controller, wherein the calcining furnace controller is arranged in the furnace body; a heating silicon carbon rod (33) is arranged in the furnace body (32), and the heating silicon carbon rod (33) is connected to the calcining furnace controller circuit; When the fiberboard to be produced is of a non-standard type, the fiberboard forming equipment comprises a plurality of first electric stirring barrels (1), first material storage barrels (2), a four-column hydraulic press (3), a water storage barrel (4), and a water return barrel (5), wherein several of the first electric stirring barrels (1) are connected to the first material storage barrel (2) via a first material delivery pipe (6), and the other several of the first electric stirring barrels (1) are connected to the four-column hydraulic press (3) via a second material delivery pipe (7), and the water storage barrel (4) and the water return barrel (5) are respectively connected to the first electric stirring barrel (1); The fiberboard forming equipment also includes a vacuum suction filtration device, which is connected to the four-column hydraulic press (3); the vacuum suction filtration device includes a first vacuum pump (8) and a plurality of first negative pressure gas storage tanks (9), and the first vacuum pump (8) is connected to the first negative pressure gas storage tank (9); a vacuum suction pipe is provided at the upper end of each first negative pressure gas storage tank (9), and a water pump (10) is provided in the first negative pressure gas storage tank (9), and the water pump (10) is connected to the return water bucket (5) through a first return water pipe (11); the vacuum suction pipe is connected to the barrel (12) of the four-column hydraulic press (3).

2. A preparation device for a lightweight, high temperature resistant and fire resistant fiberboard as claimed in claim 1, It is characterized in that When the fiberboard to be produced is of standard type, the fiberboard forming equipment comprises a plurality of second electric stirring barrels (16), a second material storage barrel (17), a vacuum forming machine (18), a high-pressure water pump (19), a second vacuum pump (20), and a screw air compressor (21). The bottom of the second electric stirring barrel (16) is connected to the second material storage barrel (17). A high-pressure water pump (19) is arranged in the second material storage barrel (17). The high-pressure water pump (19) is connected to the vacuum forming machine (18) through a third material delivery pipe (22). The vacuum forming machine (18) is connected to the second vacuum pump (20) and the screw air compressor (21), respectively; a water-gas separator (23) and a second negative pressure air storage tank (24) are connected in sequence between the vacuum forming machine (18) and the second vacuum pump (20); a positive pressure air storage tank (25) is connected between the vacuum forming machine (18) and the screw air compressor (21); the water-gas separator (23) is connected to the second electric stirring barrel (16) through a second return pipe (26).

3. A method for preparing a lightweight, high temperature resistant and fire resistant fiberboard, It is characterized in that The preparation method is prepared by using the preparation equipment according to any one of claims 1 to 2, and the preparation method comprises the following steps: When the fiberboard to be produced is of non-standard type, 70-80 parts by weight of fiber cotton, 8-12 parts of silica sol, 8-15 parts of α-alumina micropowder, and 2-6 parts of industrial deformed starch are weighed and put into the first electric stirring barrel (1) of the mechanical automated fiberboard forming equipment. The water in the water storage barrel (4) of the mechanical automated fiberboard forming equipment enters the first electric stirring barrel (1) through a pipeline. The first electric stirring barrel (1) is turned on and stirred for more than 35 minutes to obtain a first mixture. The first mixture is respectively passed through the first feeding pipe (6) and the second feeding pipe (7). The first mixed body (10) is transported to the first material storage barrel (2) and the barrel (12) of the four-column hydraulic press (3) through a pipe (7); the vacuum suction pipe of the vacuum suction filter device is inserted into the mold in the barrel (12) of the four-column hydraulic press, and the first vacuum pump (8) is turned on, so that the water in the mold is first sucked into the first negative pressure gas storage tank (9), and then pumped to the return water barrel (5) through the first return water pipe (11) under the action of the water pump (10) to supply the first electric stirring barrel (1) for recycling; the first mixed body entering the mold of the barrel (12) of the four-column hydraulic press is formed into a first fiberboard after being hot-pressed; When the fiberboard to be produced is of standard type, 70-90 parts by weight of fiber cotton, 0.5-12 parts of silica sol, 0.3-15 parts of α-alumina micropowder, 2-6 parts of industrial deformed starch and water are weighed and put into the second electric stirring barrel (16) of the mechanical automated fiberboard forming equipment, and the second electric stirring barrel (16) is turned on to stir for more than 35 minutes to obtain a second mixture; the second mixture is conveyed to the barrel of a vacuum forming machine (18) through a high-pressure water pump (19) via a third feed pipe (22), and the second vacuum pump (20), the screw air compressor (21) and the vacuum forming machine (18) are turned on. The water in the barrel of the vacuum forming machine (18) is first sucked into a water-gas separator (23), and then returned to the second electric stirring barrel (16) through a second return pipe (26) for recycling. After the second mixture is formed, a second fiberboard is formed.

4. A method for preparing a lightweight high temperature resistant and fire resistant fiberboard as claimed in claim 3, It is characterized in that The preparation method further comprises the following steps: The first fiberboard or the second fiberboard is transported to the oven by a trolley (13) and dried at 120°C to make the dryness of the first fiberboard or the second fiberboard reach more than 95%; The dried first fiberboard or the second fiberboard is transported to the high-temperature calcining furnace by a trolley and calcined at 800° C. to 1400° C. for 10 to 14 hours; The calcined first fiberboard or the second fiberboard is ground and cut by the post-processing equipment, and processed into various products according to the required product precision.

5. A method for preparing a lightweight high temperature resistant and fire resistant fiberboard as claimed in claim 3, It is characterized in that The fiber cotton is selected from 1260℃ type fiber cotton, 1400℃ type fiber cotton, 1430℃ type fiber cotton, 1600℃ type fiber cotton, and 1700℃ type fiber cotton.

6. A lightweight, high temperature resistant and fire resistant fiberboard, It is characterized in that The fiberboard is prepared by the preparation method described in any one of claims 3-5.

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