CN113213820A - Non-combustible fireproof insulation board and preparation method thereof - Google Patents
Non-combustible fireproof insulation board and preparation method thereof Download PDFInfo
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- CN113213820A CN113213820A CN202110500381.XA CN202110500381A CN113213820A CN 113213820 A CN113213820 A CN 113213820A CN 202110500381 A CN202110500381 A CN 202110500381A CN 113213820 A CN113213820 A CN 113213820A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/28—Polysaccharides or derivatives thereof
- C04B26/285—Cellulose or derivatives thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
Abstract
The invention discloses a non-combustible fireproof insulation board which comprises the following components in parts by weight: 90-95% of inorganic flame retardant, 0.5-1.5% of binder and 3-10% of polystyrene powder. The preparation method comprises the following steps: s1: dissolving a binder in water to form a binder solution for later use, wherein the concentration of the binder solution is 1-10%; s2: uniformly spraying the obtained binder solution on the surface of an inorganic flame retardant, then adding polystyrene powder for stirring, and drying after uniform stirring to obtain wrapped polystyrene particles for later use; s3: foaming the coated polystyrene particles obtained in the above steps for 1-6h under high-pressure steam, then standing and aging at normal temperature for 24-144h, and finally pressing and forming to obtain the non-combustible fireproof insulation board. The insulation board prepared by the invention has good heat insulation and energy saving effects, low water absorption and long service life.
Description
Technical Field
The invention belongs to the technical field of insulation boards, and particularly relates to a non-combustible fireproof insulation board and a preparation method thereof.
Background
At present, the thermal insulation materials used in the market are mainly divided into two categories, namely inorganic thermal insulation materials and organic thermal insulation materials. In summary, the organic thermal insulation material has the advantages of light weight, good thermal insulation performance, good material processability and the like, but has poor fireproof performance, poor stability and poor aging resistance. Inorganic heat-insulating materials such as perlite, diatomite, asbestos, slag wool, foam glass and the like have certain fireproof performance, but have high heat conductivity coefficient, poor heat-insulating performance and larger volume weight.
At present, the external thermal insulation system applied to the external wall of China mainly has the following forms: an expanded polystyrene board (EPS) thin plastered wall external thermal insulation system, a large-mould built-in (meshed or non-meshed) external thermal insulation system, a glue powder polyphenyl particle external thermal insulation system, a polyurethane (sprayed or plate) external thermal insulation system, an extruded sheet (XPS) external thermal insulation system and the like. The EPS boards occupy a large share of the heat preservation market with the advantages of low price, simple construction and the like. Polystyrene foams are classified into molded polystyrene boards (EPS) and extruded polystyrene boards (XPS). But its flexural strength is not high.
The polystyrene foam plastic is prepared by taking polystyrene resin as a main body and adding additives such as a foaming agent and the like, and is a most used buffer material at present. It has closed pore structure, small water absorption and excellent water resistance; the density is low; the mechanical strength is good, and the buffering performance is excellent; the processability is good, and the molding forming is easy; good colorability, strong temperature adaptability, excellent radiation resistance and the like, and has high dimensional precision and uniform structure. And therefore its occupancy is high in exterior wall insulation. But emits styrene gas which pollutes the environment when being burned. It is a class B material in the construction profession.
In patent 201410070293.0, a method for producing a polystyrene insulation board comprises: (1) pre-foaming expandable polystyrene particles to obtain polystyrene beads; (2) uniformly stirring a foaming agent, a curing agent and a surfactant to prepare a liquid auxiliary agent; (3) adding thermosetting resin and the liquid auxiliary agent into the polystyrene beads, and uniformly stirring; (4) adding a flame retardant into the obtained mixture, and uniformly mixing; and (5) transferring the obtained material into a forming die, and molding under steam pressure. The method has simple and convenient process, and can improve the compression strength, the drawing strength and the fire resistance of the product. Although the above problems are solved, the following problems still remain:
the polystyrene insulation board produced by the method has high water absorption, high heat conductivity coefficient, high water absorption and poor tensile strength.
Disclosure of Invention
The invention aims to provide a non-combustible fireproof insulation board and a preparation method thereof, and aims to solve the problems in the background technology.
The invention completely discards the design idea of the traditional A2-grade flame-retardant and heat-insulating material, adopts a brand-new fire-proof and heat-insulating concept, and adopts polystyrene particles with excellent heat-insulating property to wrap inorganic flame retardant with excellent flame-retardant property, on one hand, the polystyrene particle material used as a framework material has the volume percentage up to 97 percent and is wrapped on the surface of the inorganic flame retardant, so that the inorganic flame retardant is uniformly separated, the heat transfer is inhibited, and the heat conductivity coefficient of the heat-insulating material is ensured; on the other hand, the inorganic flame retardant with excellent high-density flame retardant performance has the mass percentage of more than 92 percent, and can fully play a role in flame retardance and smoke suppression in the combustion process; the problem of compatibility of the polystyrene and the inorganic flame retardant is solved through the binder, the problem of polystyrene particle strength and the problem of water absorption and heat absorption of the inorganic flame retardant are solved through the polystyrene, and the problems of high heat conductivity coefficient, large water absorption, poor tensile strength and the like of the traditional A2-grade heat insulation material are fundamentally solved.
In order to achieve the purpose, the invention provides the following technical scheme: a non-combustible fireproof insulation board comprises the following components in parts by weight: 90-95% of inorganic flame retardant, 0.5-1.5% of binder and 3-10% of polystyrene powder, wherein the polystyrene powder can be replaced by graphite/graphene polystyrene powder.
Preferably, the density of the inorganic flame retardant is more than or equal to 1.5g/cm3Good chemical stability, insolubility in water and organic solvent, decomposition temperature higher than 120 deg.C, inorganic flame retardant of inorganic salt and metal oxide, and preferable real density not less than 3.5g/cm3The decomposition temperature is more than 200 ℃.
In any of the above embodiments, the inorganic flame retardant is in the form of powder, the particle size is 10 to 500 mesh, and the purity is 70 to 100%.
In any of the above schemes, the inorganic flame retardant is preferably in a powder form, the particle size is 100-300 meshes, and the purity is 85-95%.
In any of the above schemes, preferably, the particle size of the polystyrene powder or the graphite/graphene polystyrene powder is 100-1000 meshes, the expansion ratio is 10-200 times, and the flame retardant grade reaches the international grade B1; among them, the particle size is preferably 300-600 mesh and the expansion ratio is preferably 80-120.
In any of the above embodiments, the binder may be aqueous or oily, and preferably is aqueous, and includes sodium hydroxymethyl cellulose, hydroxyethyl cellulose, gelatin, and carrageenan.
A preparation method of a non-combustible fireproof insulation board comprises the following steps in sequence:
s1: dissolving a binder in water to form a binder solution for later use, wherein the concentration of the binder solution is 1-10%;
s2: uniformly spraying the obtained binder solution on the surface of an inorganic flame retardant, then adding polystyrene powder for stirring, and drying after uniform stirring to obtain wrapped polystyrene particles for later use;
s3: foaming the coated polystyrene particles obtained in the above steps for 1-6h under high-pressure steam, then standing and aging at normal temperature for 24-144h, and finally pressing and forming to obtain the non-combustible fireproof insulation board.
Preferably, in step S3, the temperature of the water vapor is 120-180 ℃.
In any of the above embodiments, preferably, in step S3, the pressure is 0.3 to 1.2 MPa.
In any of the above embodiments, in step S3, the pressure during the press molding is preferably 0.4 to 0.8 MPa.
The invention has the technical effects and advantages that:
(1) the heat preservation and insulation effect is good: the polystyrene A2 grade heat insulation material completely inherits the excellent heat insulation performance of polystyrene particles, the heat conductivity coefficient of the polystyrene A2 grade heat insulation material is less than 0.035W/(m × K), which is half of the traditional A2 grade heat insulation material silicon plate and the real gold plate and is 60 percent of rock wool; this means the same insulation effect, polystyrene grade A2 insulation material 50-60% of them;
(2) the comprehensive performance is excellent: the polystyrene A2 grade heat insulation material also has a series of advantages of low polystyrene water absorption (less than 3% v/v), long service life (more than 30 years), good dimensional stability (less than 2% of high and low temperature deformation), simple construction and the like; especially, the dosage is small, the weight is light, and the operation of workers is simple and quick;
(3) the safety performance is good: the polystyrene A2-grade heat-insulating material solves the problem of flammability of the traditional polystyrene particles, and completely reaches the A2-grade flame-retardant standard in GB-80264-plus 2012 of the Ministry of public Security; moreover, the material is a thermosetting material, has stable chemical properties and does not have fly ash, flying silks and toxic gas; the health of constructors is not affected;
(3) the construction process is mature: the construction process can be the same as that of the traditional thin-plastered external thermal insulation system, is mature, is convenient for workers to construct, is safe and reliable, and does not have the defect of instability of other novel material systems.
Detailed Description
The following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
a non-combustible fireproof insulation board comprises the following components in parts by weight: 95% of inorganic flame retardant, 0.5% of binder and 4.5% of polystyrene powder.
Specifically, the density of the inorganic flame retardant is more than or equal to 1.5g/cm3Good chemical stability, insolubility in water and organic solvent, decomposition temperature higher than 120 deg.C, inorganic flame retardant of inorganic salt and metal oxide, and preferable real density not less than 3.5g/cm3The decomposition temperature is more than 200 ℃.
Specifically, the inorganic flame retardant is powder, the particle size is 10-500 meshes, and the purity is 70-100%.
Specifically, the inorganic flame retardant is powder, the particle size is 100-300 meshes, and the purity is 85-95%.
Specifically, the particle size of the polystyrene powder is 100-1000 meshes, the foaming ratio is 10-200 times, and the flame retardant grade reaches the national standard B1 grade; among them, the particle size is preferably 300-600 mesh and the expansion ratio is preferably 80-120.
Specifically, the binder may be aqueous or oily, preferably aqueous, and includes sodium hydroxymethyl cellulose, hydroxyethyl cellulose, gelatin, carrageenan.
Example 2:
a non-combustible fireproof insulation board comprises the following components in parts by weight: 92% of inorganic flame retardant, 0.8% of binder and 7.2% of polystyrene powder.
Specifically, the density of the inorganic flame retardant is more than or equal to 1.5g/cm3Good chemical stability, insolubility in water and organic solvent, decomposition temperature higher than 120 deg.C, inorganic flame retardant of inorganic salt and metal oxide, and preferable real density not less than 3.5g/cm3The decomposition temperature is more than 200 ℃.
Specifically, the inorganic flame retardant is powder, the particle size is 10-500 meshes, and the purity is 70-100%.
Specifically, the inorganic flame retardant is powder, the particle size is 100-300 meshes, and the purity is 85-95%.
Specifically, the particle size of the polystyrene powder is 100-1000 meshes, the foaming ratio is 10-200 times, and the flame retardant grade reaches the national standard B1 grade; among them, the particle size is preferably 300-600 mesh and the expansion ratio is preferably 80-120.
Specifically, the binder may be aqueous or oily, preferably aqueous, and includes sodium hydroxymethyl cellulose, hydroxyethyl cellulose, gelatin, carrageenan.
Example 3:
a non-combustible fireproof insulation board comprises the following components in parts by weight: 90.7% of inorganic flame retardant, 1.3% of binder and 8% of polystyrene powder.
Specifically, the density of the inorganic flame retardant is more than or equal to 1.5g/cm3Good chemical stability, insolubility in water and organic solvent, decomposition temperature higher than 120 deg.C, inorganic flame retardant of inorganic salt and metal oxide, and preferable real density not less than 3.5g/cm3The decomposition temperature is more than 200 ℃.
Specifically, the inorganic flame retardant is powder, the particle size is 10-500 meshes, and the purity is 70-100%.
Specifically, the inorganic flame retardant is powder, the particle size is 100-300 meshes, and the purity is 85-95%.
Specifically, the particle size of the polystyrene powder is 100-1000 meshes, the foaming ratio is 10-200 times, and the flame retardant grade reaches the national standard B1 grade; among them, the particle size is preferably 300-600 mesh and the expansion ratio is preferably 80-120.
Example 4:
a non-combustible fireproof insulation board comprises the following components in parts by weight: 95% of inorganic flame retardant, 0.5% of binder and 4.5% of graphite/graphene polystyrene powder.
Specifically, the density of the inorganic flame retardant is more than or equal to 1.5g/cm3Good chemical stability, insolubility in water and organic solvent, decomposition temperature higher than 120 deg.C, inorganic flame retardant of inorganic salt and metal oxide, and preferable real density not less than 3.5g/cm3The decomposition temperature is more than 200 ℃.
Specifically, the inorganic flame retardant is powder, the particle size is 10-500 meshes, and the purity is 70-100%.
Specifically, the inorganic flame retardant is powder, the particle size is 100-300 meshes, and the purity is 85-95%.
Specifically, the particle size of the graphite/graphene polystyrene powder is 100-1000 meshes, the foaming multiplying power is 10-200 times, and the flame retardant grade reaches the national standard B1 grade; among them, the particle size is preferably 300-600 mesh and the expansion ratio is preferably 80-120.
Specifically, the binder may be aqueous or oily, preferably aqueous, and includes sodium hydroxymethyl cellulose, hydroxyethyl cellulose, gelatin, carrageenan.
Example 5:
a non-combustible fireproof insulation board comprises the following components in parts by weight: 92% of inorganic flame retardant, 0.8% of binder and 7.2% of graphite/graphene polystyrene powder.
Specifically, the density of the inorganic flame retardant is more than or equal to 1.5g/cm3Good chemical stability, insolubility in water and organic solvent, decomposition temperature higher than 120 deg.C, inorganic flame retardant of inorganic salt and metal oxide, and preferable real density not less than 3.5g/cm3Decomposition temperatureThe degree is more than 200 ℃.
Specifically, the inorganic flame retardant is powder, the particle size is 10-500 meshes, and the purity is 70-100%.
Specifically, the inorganic flame retardant is powder, the particle size is 100-300 meshes, and the purity is 85-95%.
Specifically, the particle size of the graphite/graphene polystyrene powder is 100-1000 meshes, the foaming multiplying power is 10-200 times, and the flame retardant grade reaches the national standard B1 grade; among them, the particle size is preferably 300-600 mesh and the expansion ratio is preferably 80-120.
Specifically, the binder may be aqueous or oily, preferably aqueous, and includes sodium hydroxymethyl cellulose, hydroxyethyl cellulose, gelatin, carrageenan.
Example 6:
a non-combustible fireproof insulation board comprises the following components in parts by weight: 90.7% of inorganic flame retardant, 1.3% of binder and 8% of graphite/graphene polystyrene powder.
Specifically, the density of the inorganic flame retardant is more than or equal to 1.5g/cm3Good chemical stability, insolubility in water and organic solvent, decomposition temperature higher than 120 deg.C, inorganic flame retardant of inorganic salt and metal oxide, and preferable real density not less than 3.5g/cm3The decomposition temperature is more than 200 ℃.
Specifically, the inorganic flame retardant is powder, the particle size is 10-500 meshes, and the purity is 70-100%.
Specifically, the inorganic flame retardant is powder, the particle size is 100-300 meshes, and the purity is 85-95%.
Specifically, the particle size of the graphite/graphene polystyrene powder is 100-1000 meshes, the foaming multiplying power is 10-200 times, and the flame retardant grade reaches the national standard B1 grade; among them, the particle size is preferably 300-600 mesh and the expansion ratio is preferably 80-120.
Example 7:
a non-combustible fireproof insulation board comprises the following components in parts by weight: 89% of inorganic flame retardant, 0.4% of binder and 10.6% of polystyrene powder.
Specifically, the density of the inorganic flame retardant is more than or equal to 1.5g/cm3Good chemical stability, insolubility in water and organic solvent, decomposition temperature > 120 deg.C, andthe inorganic flame retardant is inorganic salt or metal oxide flame retardant, preferably with true density of 3.5g/cm or more3The decomposition temperature is more than 200 ℃.
Specifically, the inorganic flame retardant is powder, the particle size is 10-500 meshes, and the purity is 70-100%.
Specifically, the inorganic flame retardant is powder, the particle size is 100-300 meshes, and the purity is 85-95%.
Specifically, the particle size of the polystyrene powder is 100-1000 meshes, the foaming ratio is 10-200 times, and the flame retardant grade reaches the national standard B1 grade; among them, the particle size is preferably 300-600 mesh and the expansion ratio is preferably 80-120.
Specifically, the binder may be aqueous or oily, preferably aqueous, and includes sodium hydroxymethyl cellulose, hydroxyethyl cellulose, gelatin, carrageenan.
Specifically, the binder may be aqueous or oily, preferably aqueous, and includes sodium hydroxymethyl cellulose, hydroxyethyl cellulose, gelatin, carrageenan.
Example 8:
a non-combustible fireproof insulation board comprises the following components in parts by weight: 96% of inorganic flame retardant, 1.6% of binder and 2.4% of polystyrene powder.
Specifically, the density of the inorganic flame retardant is more than or equal to 1.5g/cm3Good chemical stability, insolubility in water and organic solvent, decomposition temperature higher than 120 deg.C, inorganic flame retardant of inorganic salt and metal oxide, and preferable real density not less than 3.5g/cm3The decomposition temperature is more than 200 ℃.
Specifically, the inorganic flame retardant is powder, the particle size is 10-500 meshes, and the purity is 70-100%.
Specifically, the inorganic flame retardant is powder, the particle size is 100-300 meshes, and the purity is 85-95%.
Specifically, the particle size of the polystyrene powder is 100-1000 meshes, the foaming ratio is 10-200 times, and the flame retardant grade reaches the national standard B1 grade; among them, the particle size is preferably 300-600 mesh and the expansion ratio is preferably 80-120.
Specifically, the binder may be aqueous or oily, preferably aqueous, and includes sodium hydroxymethyl cellulose, hydroxyethyl cellulose, gelatin, carrageenan.
Specifically, the binder may be aqueous or oily, preferably aqueous, and includes sodium hydroxymethyl cellulose, hydroxyethyl cellulose, gelatin, carrageenan.
The invention also provides a preparation method of the non-combustible fireproof insulation board, which comprises the following steps in sequence:
s1: dissolving a binder in water to form a binder solution for later use, wherein the concentration of the binder solution is 1-10%;
s2: uniformly spraying the obtained binder solution on the surface of an inorganic flame retardant, then adding polystyrene powder for stirring, and drying after uniform stirring to obtain wrapped polystyrene particles for later use;
s3: foaming the coated polystyrene particles obtained in the step for 1-6h under high-pressure steam, wherein the temperature of the steam is 120-180 ℃ and the pressure is 0.3-1.2MPa, standing and aging at normal temperature for 24-144h, and finally pressing and forming, wherein the pressure during pressing and forming is 0.4-0.8MPa, so as to obtain the non-combustible fireproof heat-preservation plate.
The incombustible fireproof insulation boards prepared by the preparation method of the incombustible fireproof insulation board in the embodiments 1 to 8 are tested, all indexes of the test are international standards, reagents, materials and the like are purchased from a certain chemical reagent company in Beijing, and test results are shown in the following table:
although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A non-combustible fireproof insulation board is characterized in that: comprises the following components in percentage by weight: 90-95% of inorganic flame retardant, 0.5-1.5% of binder and 3-10% of polystyrene powder.
2. A non-combustible fireproof insulation board according to claim 1, characterized in that: the density of the inorganic flame retardant is more than or equal to 1.5g/cm3And the inorganic flame retardant is inorganic salt and metal oxide flame retardant.
3. A non-combustible fireproof insulation board according to claim 1, characterized in that: the inorganic flame retardant is powder, the particle size is 10-500 meshes, and the purity is 70-100%.
4. A non-combustible fireproof insulation board according to claim 1, characterized in that: the inorganic flame retardant is powder, the particle size is 100-300 meshes, and the purity is 85-95%.
5. A non-combustible fireproof insulation board according to claim 1, characterized in that: the particle size of the polystyrene powder is 100-1000 meshes.
6. A non-combustible fireproof insulation board according to claim 1, characterized in that: the binder comprises sodium hydroxymethyl cellulose, hydroxyethyl cellulose, gelatin and carrageenan.
7. A method for preparing a non-combustible fireproof insulation board according to claim 1, characterized in that: the method comprises the following steps in sequence:
s1: dissolving a binder in water to form a binder solution for later use, wherein the concentration of the binder solution is 1-10%;
s2: uniformly spraying the obtained binder solution on the surface of an inorganic flame retardant, then adding polystyrene powder for stirring, and drying after uniform stirring to obtain wrapped polystyrene particles for later use;
s3: foaming the coated polystyrene particles obtained in the above steps for 1-6h under high-pressure steam, then standing and aging at normal temperature for 24-144h, and finally pressing and forming to obtain the non-combustible fireproof insulation board.
8. The preparation method of the noncombustible fireproof heat-insulation board according to claim 7, characterized by comprising the following steps: in step S3, the temperature of the water vapor is 120-180 ℃.
9. The preparation method of the noncombustible fireproof heat-insulation board according to claim 7, characterized by comprising the following steps: in step S3, the pressure is 0.3 to 1.2 MPa.
10. The preparation method of the noncombustible fireproof heat-insulation board according to claim 7, characterized by comprising the following steps: in step S3, the pressure at the time of press molding is 0.4 to 0.8 MPa.
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