Fireproof board for building fire protection

Abstract

The present invention provides a fireproof board for building fire protection, wherein the fireproof board is formed by placing a fiber cloth woven from multiple layers of modified basalt fibers and a silicate cement slurry in a mold and curing the fiber cloth; the fireproof board is prepared by the following preparation method: a fiber cloth woven from multiple layers of modified basalt fibers, silicate cement, tetramethylguanidinopropyltrimethoxysilane, polynaphthalene formaldehyde sulfonic acid sodium salt: a phenolic resin, di(4-isopropylphenyl) sulfone and a flame retardant are dispersed in deionized water to obtain a slurry, and then the multiple layers of fiber cloth are stacked and immersed in the slurry, placed in a mold and cured, and dried to obtain a fireproof board for building fire protection. The fireproof board for building fire protection of the present invention has low thermal conductivity, low water absorption and good mechanical properties.

Description

Technical Field

[0001] The invention relates to a fireproof plate for building fire protection. Background Art

[0002] With the improvement of my country's building energy-saving standards and the rapid development of the national economy, external insulation technology has developed rapidly in my country. Building exterior wall insulation systems have increasingly become an important part of human settlement projects. The construction industry has higher and higher requirements for insulation boards. As one of the main materials of insulation boards, the quality of insulation materials will have a direct impact on the thermal conductivity, combustion performance, tensile bonding strength and weather resistance of insulation decorative boards.

[0003] Rockwool insulation decorative panels, also known as rockwool boards, are commonly used insulation materials and are widely used in building materials engineering. Ordinary rockwool boards are made by firing basalt and dolomite at high temperatures and cannot usually be used directly during construction, requiring processing. Composite rockwool boards are made by combining ordinary rockwool boards with other materials such as cement mortar, improving on the defects of rockwool boards. However, their disadvantages include low energy-saving effects, easy water absorption, and severe impact on insulation performance after moisture. They also have poor mechanical properties and low tensile strength, which leads to a decrease in the strength of the composite rockwool boards and the shedding of the insulation layer, affecting their structural safety and greatly endangering building safety. Summary of the Invention

[0004] The present invention provides a fireproof board for building fire protection, which is formed by placing multiple layers of fiber cloth woven from modified basalt fibers and a silicate cement slurry in a mold and curing. The fireproof board is prepared by the following preparation method: dispersing multiple layers of fiber cloth woven from modified basalt fibers, silicate cement, tetramethylguanidinopropyltrimethoxysilane, sodium salt of polynaphthalene formaldehyde sulfonate: phenolic resin, di(4-isopropylphenyl)sulfone, and a flame retardant in deionized water to obtain a slurry; then, stacking the multiple layers of fiber cloth, immersing them in the slurry, placing them in a mold, curing them, and drying them to obtain the fireproof board for building fire protection. The fireproof board for building fire protection of the present invention has low thermal conductivity, low water absorption, and good mechanical properties.

[0005] A fireproof board for building fire protection, wherein the fireproof board for building fire protection is prepared by the following preparation method:

[0006] 1) Cerium oxide added to basalt ore is crushed into particles, melted to form a spinning melt; the spinning melt is drawn to obtain basalt fiber;

[0007] 2) placing the basalt fiber in a tube furnace, introducing hydrogen, and heating for a predetermined time, then introducing a mixture of monosilane and acetylene and heating for a predetermined time to obtain silicon carbide-coated basalt fiber;

[0008] 3) twisting the basalt fiber obtained in step 2) into coarse sand, and then weaving it into fiber cloth;

[0009] 4) dispersing silicate cement, tetramethylguanidinopropyltrimethoxysilane, polynaphthalene formaldehyde sulfonic acid sodium salt, phenolic resin, di(4-isopropylphenyl)sulfone and flame retardant in deionized water to obtain a slurry;

[0010] 5) pouring the slurry in step 4) into a mold, and immersing multiple layers of modified basalt fiber cloth in step 4 into the slurry in the mold for curing;

[0011] 6) The solidified material is dried and cut into pieces to obtain the fireproof board for building fire protection.

[0012] Furthermore, in step 1, the mass ratio of the basalt ore to cerium oxide is 100:5-8, and the basalt ore and cerium oxide are melted at a melting temperature of 1300-1500° C. to obtain a spinning solution.

[0013] Furthermore, in step 2, the basalt fiber is placed in a tubular furnace, a hydrogen / nitrogen mixture with a hydrogen content of 5 volume% is introduced, and heated at 300-350°C for 0.5-1h, and a mixture of monosilane and acetylene with a volume ratio of 2:1 is introduced and heated at 350-400°C for 6-12h to obtain silicon carbide-coated basalt fiber.

[0014] Furthermore, in step 3, the linear density of the coarse sand is 2000-2200 tex, and the weight of the fiber cloth is 500-550 g·m -2 ; The warp and weft density is: (20-30)×(20-30) / root·cm-1.

[0015] Furthermore, in step 4, 50-70 parts by mass of silicate cement, 4-6 parts by mass of tetramethylguanidinopropyltrimethoxysilane, 2-4 parts by mass of polynaphthalene formaldehyde sulfonic acid sodium salt, 8-10 parts by mass of phenolic resin, 2-3 parts by mass of di(4-isopropylphenyl)sulfone and 5-10 parts by mass of flame retardant are dispersed in 50 parts by mass of deionized water to obtain a slurry.

[0016] Furthermore, the flame retardant is selected from one or more of magnesium hydroxide, calcium carbonate, and silicon dioxide.

[0017] Beneficial technical effects of the present invention

[0018] 1) The present invention coats the surface of basalt fiber with silicon carbide. Silicon carbide has a low thermal expansion coefficient, high-temperature pressure resistance, and high flexural strength, while basalt fiber has a low thermal conductivity and good thermal insulation performance. The combination of the two can improve the mechanical properties and high-temperature stability of basalt fiber. At the same time, silicon carbide has a high thermal conductivity at room temperature, generally exceeding 100W / (mK), which can to a certain extent prevent rapid local temperature accumulation.

[0019] 2) The inventors discovered that after basalt is doped with cerium oxide, hydrogen reduction can produce elemental particles on the surface of the basalt, which can catalyze the precipitation of silane and acetylene around them at high temperatures, producing an anchoring effect and improving the coating effect. Cerium oxide is one of the components of basalt, so doping with cerium oxide will not affect the crystallization and drawing process of basalt.

[0020] 3) Tetramethylguanidinopropyltrimethoxysilane increases the number of active groups on the surface of basalt fiber, improves the dispersibility of modified basalt fiber, and enhances the mechanical properties of the board. The combination of di(4-isopropylphenyl)sulfone and phenolic resin, the hydrophobic groups of both can reduce the water absorption of the board and improve the thermal insulation effect. At the same time, their combination can increase the compressive strength of the material and enhance the mechanical properties. Example

[0021] The present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples within the scope of the present invention.

[0022] In order to accurately compare the effects of process parameters on board performance, basalt fibers with a diameter of 20 μm were used, the linear density of coarse sand was 3000 tex, and the weight of the fiber cloth was 550 ± 5 g·m -2 ; Warp and weft density: 30×30 / root·cm -1 The above parameters are not intended to limit the present invention, and basalt fibers with any parameters can be selected as needed.

[0023] Example 1

[0024] 1) crushing basalt ore and cerium oxide into particles, wherein the mass ratio of the basalt ore to the cerium oxide is 100:5, and melting the particles at a melting temperature of 1300° C. to obtain a spinning solution; and drawing the spinning solution to obtain basalt fibers with a diameter of 20 μm.

[0025] 2) placing the basalt fiber in a tube furnace, introducing a hydrogen / nitrogen mixture with a hydrogen content of 5% by volume, heating at 300°C for 1 hour, introducing a mixture of monosilane and acetylene in a volume ratio of 2:1, and heating at 350°C for 12 hours to obtain silicon carbide-coated basalt fiber;

[0026] 3) The basalt fiber obtained in step 2) is twisted into coarse sand, and then woven into fiber cloth, wherein the linear density of the coarse sand is 2000 tex, and the weight of the fiber cloth is 550 g·m -2 ; Warp and weft density: 30×30 / root·cm -1 ;

[0027] 4) Dispersing 70 parts by mass of Portland cement, 4 parts by mass of tetramethylguanidinopropyltrimethoxysilane, 2 parts by mass of polynaphthalene formaldehyde sulfonic acid sodium salt, 8 parts by mass of phenolic resin, 2 parts by mass of di(4-isopropylphenyl)sulfone and 5 parts by mass of magnesium hydroxide in 50 parts by mass of deionized water, stirring uniformly to obtain a slurry;

[0028] 5) Pour the slurry in step 4) into a mold, and immerse 5 layers of modified basalt fiber cloth in step 4 into the slurry in the mold for curing;

[0029] 6) The solidified material is dried until the moisture content is less than 5% by mass, and then cut into pieces to obtain the fireproof board for building fire protection.

[0030] Example 2

[0031] 1) crushing basalt ore and cerium oxide into particles, wherein the mass ratio of the basalt ore to the cerium oxide is 100:8, and melting the particles at a melting temperature of 1300° C. to obtain a spinning solution; and drawing the spinning solution to obtain basalt fibers with a diameter of 20 μm.

[0032] 2) placing the basalt fiber in a tube furnace, introducing a hydrogen / nitrogen mixture with a hydrogen content of 5% by volume, heating at 300°C for 0.5 h, introducing a mixture of monosilane and acetylene in a volume ratio of 2:1, and heating at 400°C for 6 h to obtain silicon carbide-coated basalt fiber;

[0033] 3) The basalt fiber obtained in step 2) is twisted into coarse sand, and then woven into fiber cloth, wherein the linear density of the coarse sand is 2000 tex, and the weight of the fiber cloth is 550 g·m -2 ; Warp and weft density: 30×30 / root·cm -1 ;

[0034] 4) Dispersing 70 parts by mass of Portland cement, 6 parts by mass of tetramethylguanidinopropyltrimethoxysilane, 4 parts by mass of polynaphthalene formaldehyde sulfonic acid sodium salt, 10 parts by mass of phenolic resin, 3 parts by mass of di(4-isopropylphenyl)sulfone and 5 parts by mass of magnesium hydroxide in 50 parts by mass of deionized water, stirring uniformly to obtain a slurry;

[0035] 5) Pour the slurry in step 4) into a mold, and immerse 5 layers of modified basalt fiber cloth in step 4 into the slurry in the mold for curing;

[0036] 6) The solidified material is dried until the moisture content is less than 5% by mass, and then cut into pieces to obtain the fireproof board for building fire protection.

[0037] Example 3

[0038] 1) crushing basalt ore and cerium oxide into particles, wherein the mass ratio of the basalt ore to the cerium oxide is 100:6, and melting the particles at a melting temperature of 1300° C. to obtain a spinning solution; and drawing the spinning solution to obtain basalt fibers having a diameter of 20 μm.

[0039] 2) placing the basalt fiber in a tube furnace, introducing a hydrogen / nitrogen mixture with a hydrogen content of 5% by volume, heating at 300° C. for 0.5 h, introducing a mixture of monosilane and acetylene in a volume ratio of 2:1, and heating at 350° C. for 8 h to obtain silicon carbide-coated basalt fiber;

[0040] 3) The basalt fiber obtained in step 2) is twisted into coarse sand, and then woven into fiber cloth, wherein the linear density of the coarse sand is 2000 tex, and the weight of the fiber cloth is 550 g·m -2 ; Warp and weft density: 30×30 / root·cm -1 ;

[0041] 4) Dispersing 70 parts by mass of Portland cement, 5 parts by mass of tetramethylguanidinopropyltrimethoxysilane, 3 parts by mass of polynaphthalene formaldehyde sulfonic acid sodium salt, 8 parts by mass of phenolic resin, 2 parts by mass of di(4-isopropylphenyl)sulfone and 5 parts by mass of magnesium hydroxide in 50 parts by mass of deionized water, stirring uniformly to obtain a slurry;

[0042] 5) Pour the slurry in step 4) into a mold, and immerse 5 layers of modified basalt fiber cloth in step 4 into the slurry in the mold for curing;

[0043] 6) The solidified material is dried until the moisture content is less than 5% by mass, and then cut into pieces to obtain the fireproof board for building fire protection.

[0044] Comparative Example 1

[0045] 1) Crushing basalt ore into particles and melting them at a melting temperature of 1300°C to obtain a spinning solution; drawing the spinning solution to obtain basalt fibers with a diameter of 20 microns;

[0046] 2) The basalt fiber obtained in step 1) is twisted into coarse sand, and then woven into fiber cloth, wherein the linear density of the coarse sand is 2000 tex, and the weight of the fiber cloth is 550 g·m -2 ; Warp and weft density: 30×30 / root·cm -1 ;

[0047] 3) Dispersing 70 parts by mass of Portland cement, 5 parts by mass of tetramethylguanidinopropyltrimethoxysilane, 3 parts by mass of polynaphthalene formaldehyde sulfonic acid sodium salt, 8 parts by mass of phenolic resin, 2 parts by mass of di(4-isopropylphenyl)sulfone and 5 parts by mass of magnesium hydroxide in 50 parts by mass of deionized water, stirring uniformly to obtain a slurry;

[0048] 4) Pour the slurry from step 3) into a mold, and immerse 5 layers of modified basalt fiber cloth from step 3 into the slurry in the mold for curing;

[0049] 5) The solidified material is dried until the moisture content is less than 5% by mass, and then cut into pieces to obtain the fireproof board for building fire protection.

[0050] Comparative Example 2

[0051] 1) crushing basalt ore and cerium oxide into particles, wherein the mass ratio of the basalt ore to the cerium oxide is 100:6, and melting the particles at a melting temperature of 1300° C. to obtain a spinning solution; and drawing the spinning solution to obtain basalt fibers having a diameter of 20 μm.

[0052] 2) placing the basalt fiber in a tube furnace, introducing a mixture of monosilane and acetylene in a volume ratio of 2:1, and heating at 350°C for 8 hours to obtain silicon carbide-coated basalt fiber;

[0053] 3) The basalt fiber obtained in step 2) is twisted into coarse sand, and then woven into fiber cloth, wherein the linear density of the coarse sand is 2000 tex, and the weight of the fiber cloth is 550 g·m -2 ; Warp and weft density: 30×30 / root·cm -1 ;

[0054] 4) Dispersing 70 parts by mass of Portland cement, 5 parts by mass of tetramethylguanidinopropyltrimethoxysilane, 3 parts by mass of polynaphthalene formaldehyde sulfonic acid sodium salt, 8 parts by mass of phenolic resin, 2 parts by mass of di(4-isopropylphenyl)sulfone and 5 parts by mass of magnesium hydroxide in 50 parts by mass of deionized water, stirring uniformly to obtain a slurry;

[0055] 5) Pour the slurry in step 4) into a mold, and immerse 5 layers of modified basalt fiber cloth in step 4 into the slurry in the mold for curing;

[0056] 6) The solidified material is dried until the moisture content is less than 5% by mass, and then cut into pieces to obtain the fireproof board for building fire protection.

[0057] Comparative Example 3

[0058] 1) Crushing basalt ore into particles and melting them at a melting temperature of 1300°C to obtain a spinning solution; drawing the spinning solution to obtain basalt fibers with a diameter of 20 microns;

[0059] 2) placing the basalt fiber in a tube furnace, introducing a hydrogen / nitrogen mixture with a hydrogen content of 5% by volume, heating at 300° C. for 0.5 h, introducing a mixture of monosilane and acetylene in a volume ratio of 2:1, and heating at 350° C. for 8 h to obtain silicon carbide-coated basalt fiber;

[0060] 3) The basalt fiber obtained in step 2) is twisted into coarse sand, and then woven into fiber cloth, wherein the linear density of the coarse sand is 2000 tex, and the weight of the fiber cloth is 550 g·m -2 ; Warp and weft density: 30×30 / root·cm -1 ;

[0061] 4) Dispersing 70 parts by mass of Portland cement, 5 parts by mass of tetramethylguanidinopropyltrimethoxysilane, 3 parts by mass of polynaphthalene formaldehyde sulfonic acid sodium salt, 8 parts by mass of phenolic resin, 2 parts by mass of di(4-isopropylphenyl)sulfone and 5 parts by mass of magnesium hydroxide in 50 parts by mass of deionized water, stirring uniformly to obtain a slurry;

[0062] 5) Pour the slurry in step 4) into a mold, and immerse 5 layers of modified basalt fiber cloth in step 4 into the slurry in the mold for curing;

[0063] 6) The solidified material is dried until the moisture content is less than 5% by mass, and then cut into pieces to obtain the fireproof board for building fire protection.

[0064] Comparative Example 4

[0065] 1) Crushing basalt ore into particles and melting them at a melting temperature of 1300°C to obtain a spinning solution; drawing the spinning solution to obtain basalt fibers with a diameter of 20 microns;

[0066] 2) placing the basalt fiber in a tube furnace, introducing a mixture of monosilane and acetylene in a volume ratio of 2:1, and heating at 350°C for 8 hours to obtain silicon carbide-coated basalt fiber;

[0067] 3) The basalt fiber obtained in step 2) is twisted into coarse sand, and then woven into fiber cloth, wherein the linear density of the coarse sand is 2000 tex, and the weight of the fiber cloth is 550 g·m -2 ; Warp and weft density: 30×30 / root·cm -1 ;

[0068] 4) Dispersing 70 parts by mass of Portland cement, 5 parts by mass of tetramethylguanidinopropyltrimethoxysilane, 3 parts by mass of polynaphthalene formaldehyde sulfonic acid sodium salt, 8 parts by mass of phenolic resin, 2 parts by mass of di(4-isopropylphenyl)sulfone and 5 parts by mass of magnesium hydroxide in 50 parts by mass of deionized water, stirring uniformly to obtain a slurry;

[0069] 5) Pour the slurry in step 4) into a mold, and immerse 5 layers of modified basalt fiber cloth in step 4 into the slurry in the mold for curing;

[0070] 6) The solidified material is dried until the moisture content is less than 5% by mass, and then cut into pieces to obtain the fireproof board for building fire protection.

[0071] Comparative Example 5

[0072] 1) crushing basalt ore and cerium oxide into particles, wherein the mass ratio of the basalt ore to the cerium oxide is 100:6, and melting the particles at a melting temperature of 1300° C. to obtain a spinning solution; and drawing the spinning solution to obtain basalt fibers having a diameter of 20 μm.

[0073] 2) placing the basalt fiber in a tube furnace, introducing a hydrogen / nitrogen mixture with a hydrogen content of 5% by volume, heating at 300° C. for 0.5 h, introducing a mixture of monosilane and acetylene in a volume ratio of 2:1, and heating at 350° C. for 8 h to obtain silicon carbide-coated basalt fiber;

[0074] 3) The basalt fiber obtained in step 2) is twisted into coarse sand, and then woven into fiber cloth, wherein the linear density of the coarse sand is 2000 tex, and the weight of the fiber cloth is 550 g·m -2 ; Warp and weft density: 30×30 / root·cm -1 ;

[0075] 4) dispersing 70 parts by mass of Portland cement, 3 parts by mass of polynaphthalene formaldehyde sulfonic acid sodium salt, 8 parts by mass of phenolic resin, 2 parts by mass of di(4-isopropylphenyl)sulfone and 5 parts by mass of magnesium hydroxide in 50 parts by mass of deionized water, stirring uniformly to obtain a slurry;

[0076] 5) Pour the slurry in step 4) into a mold, and immerse 5 layers of modified basalt fiber cloth in step 4 into the slurry in the mold for curing;

[0077] 6) The solidified material is dried until the moisture content is less than 5% by mass, and then cut into pieces to obtain the fireproof board for building fire protection.

[0078] Comparative Example 6

[0079] 1) crushing basalt ore and cerium oxide into particles, wherein the mass ratio of the basalt ore to the cerium oxide is 100:6, and melting the particles at a melting temperature of 1300° C. to obtain a spinning solution; and drawing the spinning solution to obtain basalt fibers having a diameter of 20 μm.

[0080] 2) placing the basalt fiber in a tube furnace, introducing a hydrogen / nitrogen mixture with a hydrogen content of 5% by volume, heating at 300° C. for 0.5 h, introducing a mixture of monosilane and acetylene in a volume ratio of 2:1, and heating at 350° C. for 8 h to obtain silicon carbide-coated basalt fiber;

[0081] 3) The basalt fiber obtained in step 2) is twisted into coarse sand, and then woven into fiber cloth, wherein the linear density of the coarse sand is 2000 tex, and the weight of the fiber cloth is 550 g·m -2 ; Warp and weft density: 30×30 / root·cm -1 ;

[0082] 4) Dispersing 70 parts by mass of Portland cement, 5 parts by mass of tetramethylguanidinopropyltrimethoxysilane, 3 parts by mass of polynaphthalene formaldehyde sulfonic acid sodium salt, 8 parts by mass of phenolic resin, and 5 parts by mass of magnesium hydroxide in 50 parts by mass of deionized water, stirring uniformly to obtain a slurry;

[0083] 5) Pour the slurry in step 4) into a mold, and immerse 5 layers of modified basalt fiber cloth in step 4 into the slurry in the mold for curing;

[0084] 6) The solidified material is dried until the moisture content is less than 5% by mass, and then cut into pieces to obtain the fireproof board for building fire protection.

[0085] Experimental results

[0086] Compressive strength, compressive strength determination: refer to GB / T 5486-2008 "Test methods for inorganic rigid thermal insulation products"

[0087] Place the specimen on the pressure plate of the testing machine so that the center of the pressure plate coincides with the center of the specimen. Start the testing machine. When the upper pressure plate approaches the specimen, adjust the ball seat so that the pressure surface of the specimen is in uniform contact with the pressure plate. Load the specimen until it fails, and record the compression deformation value. If the specimen does not fail at 5% compression deformation, the load at 5% compression deformation is the failure load and record the failure load P1, accurate to 0.01MPa. The compressive strength calculation formula is as follows:

[0088] A=P1 / S;

[0089] Where: A is the compressive strength of the sample, MPa; P1 is the breaking load of the sample, N; S is the compressive area of ​​the sample, mm 2 ;

[0090] Thermal conductivity determination: refer to GB / T 10294-2008 "Insulation materials - Determination of steady-state thermal resistance and related properties - Guarded hot plate method"

[0091] The test results are shown in the table below:

[0092] Table 1

[0093]

[0094] It can be seen from the embodiment and comparative example 1 that after coating with silicon carbide, the thermal conductivity will increase, but it still meets the requirements of the composite standard, but the compressive strength improvement effect is very obvious, indicating that the mechanical properties of basalt can be significantly improved after silicon carbide coating, and it can be seen from comparative examples 2-4 that the hydrogen reduction process before coating helps to improve the coating effect, and the combination of cerium oxide doping and subsequent hydrogen reduction process significantly affects the coating effect of silicon carbide, thereby having a significant effect on the mechanical properties of the material; and from comparative examples 5-6, tetramethylguanidinopropyltrimethoxysilane increases the number of active groups on the surface of basalt fiber, improves the dispersibility of modified basalt fiber, and improves the mechanical properties of the board; di(4-isopropylphenyl)sulfone and phenolic resin are combined, and the hydrophobic groups of the two can reduce the water absorption performance of the board and improve the thermal insulation effect. At the same time, their combination can improve the compressive strength of the material and improve the mechanical properties.

[0095] Although the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as limiting the present invention.

Claims

1. A fireproof board for building fire protection, wherein the fireproof board for building fire protection is prepared by the following preparation method: 1) Add cerium oxide to basalt ore, crush it into particles, and melt it to form a spinning melt; then draw the spinning melt to obtain basalt fiber; 2) placing the basalt fiber in a tubular furnace, introducing hydrogen, and heating for a predetermined time, then introducing a mixture of monosilane and acetylene and heating for a predetermined time to obtain silicon carbide-coated basalt fiber; 3) twisting the basalt fiber obtained in step 2) into roving, and then weaving it into fiber cloth to obtain modified basalt fiber cloth; 4) dispersing silicate cement, tetramethylguanidinopropyltrimethoxysilane, polynaphthalene formaldehyde sulfonic acid sodium salt, phenolic resin, di(4-isopropylphenyl)sulfone and flame retardant in deionized water to obtain a slurry; 5) Pour the slurry from step 4) into a mold, and immerse multiple layers of modified basalt fiber cloth from step 3) into the slurry in the mold for curing; 6) Drying the solidified material and cutting it into the fireproof board for building fire protection.

2. The fireproof board according to claim 1, characterized in that: In step 1), the mass ratio of the basalt ore to the cerium oxide is 100:5-8, and the basalt ore and the cerium oxide are melted at a melting temperature of 1300-1500° C. to obtain a spinning melt.

3. The fireproof board according to claim 1, characterized in that: In step 2), the basalt fiber is placed in a tubular furnace, a hydrogen / nitrogen mixture with a hydrogen content of 5% by volume is introduced, and the mixture is heated at 300-350°C for 0.5-1 hour. A mixture of monosilane and acetylene with a volume ratio of 2:1 is introduced, and the mixture is heated at 350-400°C for 6-12 hours to obtain silicon carbide-coated basalt fiber.

4. The fireproof board according to claim 1, characterized in that: In step 3), the linear density of the roving is 2000-2200 tex, and the gram weight of the fiber cloth is 500-550 g·m -2 ; Warp and weft density: (20-30)×(20-30) / root·cm -1 .

5. The fireproof board according to claim 1, characterized in that: In step 4), 50-70 parts by mass of Portland cement, 4-6 parts by mass of tetramethylguanidinopropyltrimethoxysilane, 2-4 parts by mass of polynaphthalene formaldehyde sulfonic acid sodium salt, 8-10 parts by mass of phenolic resin, 2-3 parts by mass of di(4-isopropylphenyl)sulfone and 5-10 parts by mass of flame retardant are dispersed in 50 parts by mass of deionized water to obtain a slurry.

6. The fireproof board according to claim 5, characterized in that: The flame retardant is selected from one or more of magnesium hydroxide, calcium carbonate and silicon dioxide.

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