A kind of explosion venting sound insulation fireproof plate and a preparation method thereof

Abstract

The application discloses a kind of venting sound insulation fireproof plate and preparation method thereof, belong to material technical field.The venting sound insulation fireproof plate of the application contains high-doped hardening cement coated modified expanded vermiculite, compared with ordinary vermiculite, this component is not prone to deformation and rebound after being compressed, and also retains the porous structure of expanded vermiculite, so the reaction mechanism is basically similar to the existing high-temperature hydrated calcium silicate combined expanded vermiculite fireproof plate when the product is prepared, but the product has lower area density, and its strength, fireproof performance and sound insulation performance are relatively excellent.

Description

Technical Field

[0001] This invention relates to the field of materials technology, specifically to an explosion-proof, sound-insulating, and fireproof board and its preparation method. Background Technology

[0002] In the power industry, critical equipment needs to be protected with materials that are fireproof, explosion-proof, and soundproof. In particular, some high-voltage electrical equipment requires the use of multi-functional fireproof panels, which are also required to be lightweight for easy replacement and relocation.

[0003] To meet the above requirements, high-performance lightweight aggregates are often used to replace cement in the preparation of boards, such as expanded vermiculite. After being bonded with inorganic adhesives, it can form vermiculite fireproof boards. Based on performance requirements, expanded vermiculite is also often combined with other materials to prepare composite boards, such as water glass-bonded expanded vermiculite fireproof boards, phosphate-bonded expanded vermiculite fireproof boards, and high-temperature hydrated calcium silicate-bonded expanded vermiculite fireproof boards.

[0004] High-temperature hydrated calcium silicate-bonded expanded vermiculite fireproof board is a popular multifunctional expanded vermiculite composite fireproof board. It is mainly prepared by pre-compiling a slurry of calcareous and siliceous raw materials, which is then reacted with moistened expanded vermiculite under hydrothermal conditions. However, the existing fireproof board materials of this type have a relatively high bulk density due to the low amount of expanded vermiculite added. During the slurry mixing process, the calcareous and siliceous raw materials are absorbed into the pores of the expanded vermiculite. During pressure filtration, the expanded vermiculite deforms under pressure, squeezing out the slurry from the pores. After depressurization, the expanded vermiculite rebounds, creating voids within the product. While increasing the amount of expanded vermiculite would lower the bulk density, it would also increase the proportion of voids within the product. This reduces the bonding between the expanded vermiculite and the calcium silicate generated after high-temperature hydration, significantly reducing the product's overall performance. Summary of the Invention

[0005] Based on the deficiencies of existing technologies, the purpose of this invention is to provide an explosion-proof, sound-insulating, and fireproof board. This product contains a high amount of hardened cement-coated modified expanded vermiculite. Compared with ordinary vermiculite, this component is less prone to deformation and rebound under pressure, while also retaining the porous structure of expanded vermiculite. Therefore, the reaction mechanism during product preparation is basically similar to that of existing high-temperature hydrated calcium silicate combined with expanded vermiculite fireproof boards. However, the product has a lower areal density, and its strength, fire resistance, and sound insulation performance are all superior.

[0006] A fireproof and soundproof explosion-proof board, comprising expanded vermiculite modified with hardened cement coating.

[0007] Preferably, the hardened cement-coated modified expanded vermiculite has a loose density of 250–350 kg / m³. 3 It is obtained by mixing expanded vermiculite with cement and then curing it.

[0008] More preferably, the mass ratio of the expanded vermiculite to cement is 1:(0.05 to 0.2).

[0009] Preferably, the ratio of calcium to silicon in the composition of the explosion-proof soundproof fireproof board is (0.83-0.9):1.

[0010] The explosion-proof, sound-insulating, and fireproof board of this invention contains expanded vermiculite modified with a high amount of hardened cement coating, which not only maintains excellent strength, fire resistance, and sound insulation performance, but also significantly reduces its surface density to only 400-600 kg / m³. 2 The hardened cement-coated modified expanded vermiculite is prepared by combining expanded vermiculite with cement at a specific loose density in a specific ratio. Because the expanded vermiculite has a high degree of lamellar expansion in its micro-particles before modification, it has strong water absorption. After being mixed with cement, it can quickly adsorb cement on the surface and internal pores. After the cement hydrates, it can effectively form the external skeleton of the expanded vermiculite, inhibiting the deformation of the expanded vermiculite under pressure. It will not affect the degree of bonding with the calcium silicate formed by high-temperature hydration in the product due to excessive doping. At the same time, cement cannot completely seal the internal pores of the expanded vermiculite. Therefore, the preparation process and reaction principle are not significantly different from existing multi-functional fireproof board products combined with expanded vermiculite.

[0011] Meanwhile, the loose density of the expanded vermiculite used in the preparation of the hardened cement-coated modified expanded vermiculite in the product of this invention should not be too low or too high. If it is too low, the product's strength may be insufficient, and the sound insulation effect will be greatly affected. If the loose density is too high, not only will the surface density of the product increase, but it may also cause obvious swelling and powdering after heat treatment. On the other hand, since cement contains silicon, if too much is added, it will directly affect the overall silicon-calcium ratio of the product, leading to uneven dispersion and ultimately affecting the product's performance. If the amount added is insufficient, it will be difficult to provide effective support from the expanded vermiculite, and the product's performance will also be affected.

[0012] Preferably, the explosion-proof, sound-insulating, and fireproof board is a single-layer board.

[0013] In existing technologies, to improve the strength, fire resistance, and sound insulation of products, and to avoid gaps between expanded vermiculite and calcium silicate in the components, several components are often processed into a composite board structure. However, this not only results in a high surface density of the product (generally reaching 1000 kg / m³), but also... 2The above) also requires corresponding adjustments to the parameters of the autoclaving process, which increases energy consumption. However, the explosion-proof sound insulation and fireproof board described in this invention is a single-layer board with low surface density and does not require special adjustments to the autoclaving process when the expanded vermiculite has a high doping rate.

[0014] Preferably, the preparation method of the hardened cement-coated modified expanded vermiculite includes the following steps:

[0015] (1) Heat vermiculite to expand it, and obtain expanded vermiculite;

[0016] (2) After wetting the expanded vermiculite with atomized water, mix it evenly with cement and cure it at 15-28℃ for 1-3 days to obtain the hardened cement-coated modified expanded vermiculite.

[0017] More preferably, the vermiculite has a particle size of 0.3 to 2 mm.

[0018] More preferably, when the expanded vermiculite is wetted, the mass ratio of the atomized water to the expanded vermiculite is (1-1.5):1, and the expanded vermiculite is stirred during the wetting process.

[0019] More preferably, the cement is silicate cement with a strength grade ≥42.5.

[0020] More preferably, during the curing process, the mixture of wetted expanded vermiculite and cement is stirred at a speed of 10-15 rpm for the first 6 hours.

[0021] Because the hardening of cement is phased, and cement and expanded vermiculite have a large density difference, the inventors have verified that in the initial stage of the curing process of mixed expanded vermiculite and cement, slow stirring is required to ensure sufficient dispersion. If static treatment is used throughout the process or high-speed stirring is used in the initial stage, the expanded vermiculite will agglomerate and stick, resulting in poor overall material dispersion, making it unsuitable for the preparation of the final product.

[0022] Another object of the present invention is to provide a method for preparing the explosion-proof, sound-insulating, and fireproof board, comprising the following steps:

[0023] (1) Add silicon source and calcium source to water and mix until the material is viscous. Then add reinforcing fiber material and disperse it evenly. Adjust the water-solid ratio of the resulting mixture to (1.2~2.2):1 to obtain silicon-calcium fiber slurry.

[0024] (2) After the calcium silicate fiber slurry is mixed evenly with the hardened cement-coated modified expanded vermiculite, it is laid in a mold and formed and steam-pressed. After demolding, drying, cutting and surface sanding, the explosion-proof sound insulation fireproof board is obtained.

[0025] The preparation method of the explosion-proof, sound-insulating, and fireproof board described in this invention has simple operation steps and is similar to the preparation method of conventional multifunctional fireproof boards, thus enabling large-scale industrial production.

[0026] Preferably, in step (1), the water-to-solid ratio of the material before the reinforcing fiber material is added is (0.4-0.6):1, the silicon source is at least one of quartz powder and high-silica fine tailings powder, and the calcium source is at least one of quicklime powder, hydrated lime powder, electroslag powder, lime paste, and lime slurry; the molar ratio of total calcium to total silicon in the silicon source and calcium source is (0.65-0.85):1.

[0027] Preferably, the reinforcing fiber material is at least one of cellulose fiber, chopped aluminum silicate fiber, chopped calcium magnesium silicate glass fiber, and brucite fiber, and the fiber diameter of the reinforcing fiber material is 0.5-20 μm and the length is 5-15 mm; the mass ratio of the reinforcing fiber material to the total amount of silicon source and calcium source is m(reinforcing fiber material):m(silicon source + calcium source) = (0.02-0.1):1.

[0028] Preferably, in step (2), the pressure applied during molding is 0.2 to 0.5 MPa.

[0029] Preferably, in step (2), the temperature of the autoclaving treatment is 160-190°C and the time is 8-24 hours.

[0030] Preferably, in the preparation method of the explosion-proof sound insulation and fireproof board, the mass content of hardened cement-coated modified expanded vermiculite in the added solid raw materials is 40-70 wt%.

[0031] The beneficial effects of this invention are that it provides an explosion-proof, sound-insulating, and fireproof board containing a high amount of hardened cement-coated modified expanded vermiculite. Compared to ordinary vermiculite, this component is less prone to deformation and rebound under pressure, while also retaining the porous structure of expanded vermiculite. Therefore, the reaction mechanism during product preparation is basically similar to that of existing high-temperature hydrated calcium silicate-bonded expanded vermiculite fireproof boards. Furthermore, the surface density of this product is only 400–600 kg / m³. 2 At the same time, its strength, fire resistance and sound insulation performance are all excellent. Attached Figure Description

[0032] Figure 1 This is a process flow diagram of the preparation process of the explosion-proof, sound-insulating, and fireproof board described in this invention.

[0033] Figure 2 This is a scanning electron microscope image of the internal pores of the hardened cement-coated modified expanded vermiculite described in this invention. Detailed Implementation

[0034] To better illustrate the purpose, technical solution, and advantages of this invention, the invention will be further described below with reference to specific embodiments and comparative examples. The purpose of this description is to provide a detailed understanding of the invention, not to limit its scope. All other embodiments obtained by those skilled in the art without inventive effort are within the protection scope of this invention. Unless otherwise specified, the experimental reagents and instruments involved in the implementation of this invention are commonly used reagents and instruments.

[0035] Example 1

[0036] An embodiment of the explosion-proof, sound-insulating, and fireproof board and its preparation method according to the present invention includes the following steps:

[0037] (1) Vermiculite with a particle size of 0.3-2 mm is heated and expanded to form a loosely packed density of 280 kg / m³. 3 Expanded vermiculite;

[0038] (2) After adding and wetting the expanded vermiculite with atomized water at a mass ratio of 1:1.1, it is mixed evenly with white cement of strength grade 52.5 at a speed of 12 rpm and cured at 25°C for 1 day to obtain the hardened cement-coated modified expanded vermiculite; the mass ratio of the wetted expanded vermiculite to white cement is 1:0.1. During the first 6 hours of curing, the material is stirred at a low speed of 12 rpm. After the curing is completed, the material is stirred at the same speed for 30 minutes.

[0039] (3) Add quicklime powder and 400-mesh finely ground quartz powder to water and mix until the mixture (solid-liquid ratio 0.5:1) becomes viscous. Then add cellulose fiber and disperse it at 500 rpm for 1 min until uniform. Add water to adjust the water-solid ratio of the mixture to 2:1 to obtain a calcium silicate fiber slurry. The molar ratio of total calcium to total silicon in quicklime powder and 400-mesh finely ground quartz powder is 0.75:1. The fiber diameter of cellulose fiber is 0.5-20 μm and the length is 5-15 mm. The mass ratio of cellulose fiber to the total amount of quicklime powder and 400-mesh finely ground quartz powder is m(cellulose fiber):m(quicklime powder and 400-mesh finely ground quartz powder) = 0.02:1.

[0040] (4) After uniformly mixing the calcium silicate fiber slurry with the hardened cement-coated modified expanded vermiculite, it is laid in a mold and formed under a pressure of 0.5 MPa. The mixture is then steam-pressed at 180°C for 12 hours in a horizontal autoclave. Following demolding, drying, cutting, and surface sanding, the explosion-proof, sound-insulating, and fireproof board is obtained. In this embodiment, the mass content of expanded vermiculite in the solid raw materials is 60 wt%. The molar ratio of calcium to silicon in the total mixture of hardened cement-coated modified expanded vermiculite and calcium silicate fiber slurry is 0.85:1. The mold has a bottom with... Inside the punching steel mold, lined with mesh, is an auxiliary device with vibration and vacuum filtration functions. The slurry is poured in while vibrating. The punching spacing is 50mm along the length and width of the mold. During the preparation process, the filtrate from the vacuum filtration is recycled for the next slurry preparation, and the scraps obtained from cutting and surface sanding are also crushed and used for the next slurry preparation. The overall preparation process is as follows: Figure 1 As shown, Part I is the preparation of expanded vermiculite modified with hardened cement coating, Part II is the preparation of calcium silicate fiber slurry, and Part III is the preparation of the final product.

[0041] Example 2

[0042] An embodiment of the explosion-proof, sound-insulating, and fireproof board and its preparation method described in this invention differs from Embodiment 1 only in that the cement used is silicate cement with a strength grade of 42.5R; the hydrated lime powder is replaced with lime slurry; the cellulose fiber is replaced with chopped aluminosilicate fiber, and the mass ratio of the total amount of chopped aluminosilicate fiber to lime slurry and 400-mesh finely ground quartz powder, m(chopped aluminosilicate fiber):m(lime slurry and 400-mesh finely ground quartz powder), is 0.05:1; the molar ratio of calcium to silicon in the total material of the hardened cement-coated modified expanded vermiculite and calcium silicate fiber slurry is 0.83:1; and the autoclaving temperature is 160℃ and the time is 16h.

[0043] Example 3

[0044] An embodiment of the explosion-proof, sound-insulating, and fireproof board and its preparation method described in this invention differs from Embodiment 1 only in that the loose bulk density of the expanded vermiculite is 322 kg / m³. 3 When the expanded vermiculite is moistened with atomized water, the expanded vermiculite and atomized water are added at a mass ratio of 1:1.3. The curing temperature is 20℃ and the curing time is 2 days. The cement used is silicate cement with a strength grade of 42.5R. The hydrated lime powder is replaced with lime slurry. The cellulose fiber is replaced with chopped aluminosilicate fiber. The mass ratio of the total amount of chopped aluminosilicate fiber to lime slurry and 400-mesh finely ground quartz powder is m(chopped aluminosilicate fiber):m(lime slurry and 400-mesh finely ground quartz powder) = 0.05:1. The mass content of expanded vermiculite in the solid raw materials in this embodiment is 50wt%. The molar ratio of calcium to silicon in the total material of the hardened cement-coated modified expanded vermiculite and calcium silicate fiber slurry is 0.83:1. The autoclaving temperature is 160℃ and the time is 16h.

[0045] Comparative Example 1

[0046] A soundproof and fireproof explosion-proof board and its preparation method are disclosed, differing from Example 1 only in that the loose density of the expanded vermiculite is 218 kg / m³. 3 .

[0047] Comparative Example 2

[0048] A soundproof and fireproof explosion-proof board and its preparation method are disclosed, differing from Example 1 only in that the loose density of the expanded vermiculite is 408 kg / m³. 3 .

[0049] Comparative Example 3

[0050] A fireproof and soundproof explosion-proof board and its preparation method are disclosed, differing from Example 1 only in that the preparation steps are as follows:

[0051] (1) Vermiculite with a particle size of 0.3-2 mm is heated and expanded to form a loosely packed density of 280 kg / m³. 3 Expanded vermiculite;

[0052] (2) Add hydrated lime powder and 400-mesh finely ground quartz powder to water and mix until the mixture (solid-liquid ratio 0.5:1) becomes viscous. Then add cellulose fiber and disperse it at 500 rpm for 1 min until uniform. Add water to adjust the water-solid ratio of the mixture to 2:1 to obtain a calcium silicate fiber slurry. The molar ratio of total calcium to total silicon in hydrated lime powder and 400-mesh finely ground quartz powder is 0.85:1. The fiber diameter of cellulose fiber is 0.5-20 μm and the length is 5-15 mm. The mass ratio of cellulose fiber to the total amount of hydrated lime powder and 400-mesh finely ground quartz powder is m(cellulose fiber):m(hydrated lime powder and 400-mesh finely ground quartz powder) = 0.02:1.

[0053] (3) After the calcium silicate fiber slurry and expanded vermiculite are mixed evenly, the mixture is laid in a mold and formed under a pressure of 1 MPa and steam-pressed at 180°C for 12 hours. After demolding, drying, cutting and surface sanding, the explosion-proof sound insulation fireproof board is obtained. The mass content of expanded vermiculite in the solid raw materials used in this comparative example is 60 wt%, and the molar ratio of calcium to silicon in the total material of expanded vermiculite and calcium silicate fiber slurry is 0.85:1. All other conditions are the same as in Example 1.

[0054] Comparative Example 4

[0055] A fireproof and soundproof explosion-proof board and its preparation method are disclosed, differing from Example 1 only in that the preparation steps are as follows:

[0056] (1) Vermiculite with a particle size of 0.3-2 mm is heated and expanded to form a loosely packed density of 280 kg / m³. 3 Expanded vermiculite;

[0057] (2) Add hydrated lime powder, 400-mesh finely ground quartz powder and white cement of strength grade 52.5 to water and mix until the material (solid-liquid ratio 0.5:1) is viscous. Then add cellulose fiber and disperse it at 500 rpm for 1 min until uniform. Add water to adjust the water-solid ratio of the mixture to 2:1 to obtain calcium silicate fiber slurry. The molar ratio of total calcium to total silicon in hydrated lime powder and 400-mesh finely ground quartz powder is 0.85:1. The fiber diameter of cellulose fiber is 0.5-20 μm and the length is 5-15 mm. The mass ratio of cellulose fiber to the total amount of hydrated lime powder and 400-mesh finely ground quartz powder is m(cellulose fiber):m(hydrated lime powder and 400-mesh finely ground quartz powder) = 0.02:1.

[0058] (3) After the calcium silicate fiber slurry and expanded vermiculite are mixed evenly, the mixture is laid in a mold and formed under a pressure of 1 MPa and steam-pressed at 180°C for 12 hours. After demolding, drying, cutting and surface sanding, the explosion-proof sound insulation fireproof board is obtained. The mass content of expanded vermiculite in the solid raw materials used in this comparative example is 60 wt%, and the molar ratio of calcium to silicon in the total material of expanded vermiculite and calcium silicate fiber slurry is 0.85:1. All other conditions are the same as in Example 1.

[0059] Comparative Example 5

[0060] An explosion-proof sound-insulating fireproof board and its preparation method differ from Example 1 only in that the hardened cement-coated modified expanded vermiculite is not subjected to low-speed stirring during the first 6 hours of curing. As a result, the expanded vermiculite particles in the final product exhibit severe agglomeration and adhesion, making it unsuitable for use in the preparation of the explosion-proof sound-insulating fireproof board.

[0061] Comparative Example 6

[0062] An explosion-proof sound-insulating fireproof board and its preparation method differ from Example 1 only in that the hardened cement-coated modified expanded vermiculite is stirred at 100 rpm for the first 6 hours during the curing process. The resulting expanded vermiculite particles exhibit severe agglomeration and adhesion, making it unsuitable for use in the preparation of the explosion-proof sound-insulating fireproof board.

[0063] Example of effect 1

[0064] To verify the effectiveness of the explosion-proof, sound-insulating, and fireproof board described in this invention, the products of each embodiment and Comparative Examples 1-4 were subjected to the following tests:

[0065] (1) Surface density test;

[0066] (2) Flexural strength test: The test shall be conducted in accordance with the GB / T 5486 standard;

[0067] (3) Compressive strength test: The test shall be conducted in accordance with the GB / T 5486 standard;

[0068] (4) Flammability rating test: The test shall be conducted in accordance with the GB 8624 standard;

[0069] (5) 50mm sound insulation performance test: The test was conducted according to GB / T 19889.3 standard.

[0070] The test results are shown in Table 1.

[0071] As shown in Table 1, the products prepared in the various embodiments of the present invention can maintain an areal density of 600 kg / m³. 2 Within this range, it exhibits high flexural and compressive strength, as well as excellent fire resistance and sound insulation. The main reason for this is that the product of this invention uses hardened cement-coated modified expanded vermiculite instead of traditional filler expanded vermiculite. Furthermore, scanning electron microscopy analysis of this component reveals... Figure 2 As shown, after modification, the surface and interior of the expanded vermiculite are coated with hardened cement, effectively suppressing its deformation under pressure. However, the internal porous structure remains, so it does not affect the entry of the slurry. On the contrary, the overall material performance is further improved due to the coating of hardened cement. In contrast, the expanded vermiculite used in Comparative Example 3 was not modified. Although the explosion-proof, sound-insulating, and fireproof board prepared at the specified addition amount also has a low areal density, the product's flexural and compressive strength is insufficient. In fact, the flexural strength is only half that of the products in the various examples. When the inventors tapped the surface of the product, hollow bubbling and rebound occurred. Further cutting revealed delamination in the cross-section, indicating that pure expanded vermiculite cannot be tightly bonded with the other components of the product. If the expanded vermiculite is not pre-coated and modified, but instead, as shown in Comparative Example 4, the cement is only mixed with the expanded vermiculite and calcium silicate fiber slurry without curing. Although the overall compressive strength of the product is higher, its areal density is too high, and the toughness of the product deteriorates, with the flexural strength decreasing to below 2 MPa. The performance results of Comparative Examples 1 and 2 show that when expanded vermiculite is used for coating modification with cement, if the loose density of the expanded vermiculite is too low, the mechanical properties and sound insulation properties of the product will decline significantly, and the edges and corners are prone to damage during the cutting process. If the loose density is too high, not only will the surface density of the product increase significantly, but the product will also show obvious swelling and powdering during the combustion test, making it unsuitable for practical use.

[0072] Table 1

[0073]

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A venting, soundproofing, fireproof panel, characterized in that, The components include hardened cement-coated modified expanded vermiculite; the hardened cement-coated modified expanded vermiculite is obtained after curing after mixing expanded vermiculite with a loose bulk density of 250-350 kg / m 3 and cement. The preparation method of the hardened cement coated modified expanded vermiculite comprises the following steps: (1) heating and expanding vermiculite to obtain expanded vermiculite; (2) wetting the expanded vermiculite with atomized water, then uniformly mixing the expanded vermiculite with cement, and curing the mixture at 15-28 DEG C for 1-3 days to obtain the hardened cement coated modified expanded vermiculite; the mixture of the wetted expanded vermiculite and cement is stirred at a speed of 10-15 rpm for 6 hours before curing.

2. The venting, soundproofing, fireproof panel according to claim 1, characterized in that, The mass ratio of the expanded vermiculite to cement is 1:(0.05-0.2).

3. The venting, soundproofing, fireproof panel according to claim 1, characterized in that, The mass ratio of calcium element to silicon element in the components of the explosion venting and sound insulation fireproof plate is (0.83-0.9):

1.

4. The venting, soundproofing, fireproof panel according to claim 1, characterized in that, The mass ratio of the atomized water to the expanded vermiculite is (1-1.5):1 during the wetting process, and the expanded vermiculite is stirred during the wetting process; the cement is a silicate cement with a strength grade of 42.5 or above.

5. The method for preparing the explosion-proof, sound-insulating, and fireproof board according to any one of claims 1 to 4, characterized in that, The method comprises the following steps: (1) adding a silicon source and a calcium source into water and mixing until the mixture is thick, then adding a reinforcing fiber material and uniformly dispersing the material, and adjusting the water-solid ratio of the obtained mixture to (1.2-2.2):1 to obtain a silicon-calcium fiber slurry; (2) uniformly mixing the silicon-calcium fiber slurry with the hardened cement coated modified expanded vermiculite, then molding the mixture in a mold and performing autoclaving, and then performing demolding, drying, cutting and surface sanding to obtain the explosion venting and sound insulation fireproof plate.

6. The method for preparing the explosion-proof, sound-insulating, and fireproof board as described in claim 5, characterized in that, In step (1), the water-solid ratio of the mixture before the addition of the reinforcing fiber material is (0.4-0.6):1, the silicon source is at least one of quartz powder and high-silicon fine tailings powder, and the calcium source is at least one of slaked lime powder, quicklime powder, electroslag stone powder, lime paste and lime slurry; the molar ratio of total calcium element to total silicon element in the silicon source and the calcium source is (0.65-0.85):

1.

7. The method for preparing the explosion-proof, sound-insulating, and fireproof board as described in claim 5, characterized in that, The reinforcing fiber material is at least one of cellulose fiber, chopped silicate aluminum fiber, chopped calcium magnesium silicate glass fiber and brucite fiber, the fiber diameter of the reinforcing fiber material is 0.5-20 microns, and the length is 5-15 mm; the mass ratio of the reinforcing fiber material to the total amount of the silicon source and the calcium source is (0.02-0.1):

1.

8. The method for preparing the explosion-proof, sound-insulating, and fireproof board as described in claim 5, characterized in that, In step (2), the molding pressure is 0.2-0.5 MPa; the autoclaving temperature is 160-190 DEG C, and the autoclaving time is 8-24 hours.

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