CN112374819A - Composite hydrophobic high-density fiberboard for tunnel fire prevention and preparation method thereof - Google Patents
Composite hydrophobic high-density fiberboard for tunnel fire prevention and preparation method thereof Download PDFInfo
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- CN112374819A CN112374819A CN202011364784.8A CN202011364784A CN112374819A CN 112374819 A CN112374819 A CN 112374819A CN 202011364784 A CN202011364784 A CN 202011364784A CN 112374819 A CN112374819 A CN 112374819A
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/005—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing gelatineous or gel forming binders, e.g. gelatineous Al(OH)3, sol-gel binders
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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
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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
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention provides a composite hydrophobic high-density fiberboard for tunnel fire prevention, which consists of a hydrophobic high-density fiberboard and an inorganic waterproof coating coated on the surface of the hydrophobic high-density fiberboard; the hydrophobic high-density fiberboard is prepared from composite ceramic fibers, a first refractory filler, a first inorganic adhesive, a water repellent and a filter aid; the inorganic waterproof coating is prepared from a second inorganic adhesive, a second refractory filler and ceramic fibers. The composite hydrophobic high-density fiberboard provided by the application has the advantages of high hydrophobic rate, high strength, good fireproof performance and low smoke toxicity, and is suitable for being used as a fireproof board in humid environments such as tunnels.
Description
Technical Field
The invention relates to the technical field of fiber boards, in particular to a composite hydrophobic high-density fiber board for tunnel fire prevention and a preparation method thereof.
Background
At present, the tunnel fire prevention generally adopts the mode of spraying fire-proof paint or installing fire-proof plates. Most of the fire-retardant coatings contain alkaline substances (such as sodium carbonate and calcium hydroxide) and organic adhesives (such as polyvinyl alcohol), and the fire-retardant coatings are corroded by acidic gases in tunnels for a long time, so that the performance of the fire-retardant coatings is reduced, and the fire-retardant performance is lost. In view of above-mentioned problem, the mode that the majority adopted the installation PLASTIC LAMINATED to prevent fires, the PLASTIC LAMINATED is composite construction, uses a large amount of organic adhesives during the complex, pastes waterproof non-woven fabrics outward, in case fire the organic matter burning that contains in the PLASTIC LAMINATED and produce poisonous and harmful gas, the PLASTIC LAMINATED probably appears collapsing after the organic matter burns out.
The high-density ceramic fiber board can be used in specific fields (such as tunnels), but due to the fact that the environment in the tunnels is high in humidity and dark, the problems of dampness and mildew are often caused to the high-density ceramic fiber board, the using effect of the fiber board is further influenced, and therefore the high-density ceramic fiber board needs to be subjected to hydrophobic/waterproof treatment. Generally, the hydrophobic/waterproof treatment of the high-density ceramic fiber board adopts a mode of spraying a fireproof coating on the surface or sticking a waterproof non-woven fabric, the fireproof coating mostly uses an organic material as a binder (such as polyvinyl alcohol), but the long-term use of the fireproof coating has the problems of colloid aging, crack generation and water seepage. Therefore, it is necessary to develop a hydrophobic high-density fiberboard for tunnel fire protection having excellent performance.
Disclosure of Invention
The invention aims to provide a composite hydrophobic high-density fiberboard for tunnel fire protection, which has good fire resistance and is not aged after long-term use.
In view of the above, the present application provides a composite hydrophobic high-density fiberboard for tunnel fire protection, which is composed of a hydrophobic high-density fiberboard and an inorganic waterproof coating coated on the surface of the hydrophobic high-density fiberboard;
the hydrophobic high-density fiberboard is prepared from composite ceramic fibers, a first refractory filler, a first inorganic adhesive, a water repellent and a filter aid;
the inorganic waterproof coating is prepared from a second inorganic adhesive, a second refractory filler and ceramic fibers.
Preferably, the composite ceramic fiber content is 30-50 parts by weight, the first refractory filler content is 30-60 parts by weight, the first inorganic binder content is 5-10 parts by weight, the water repellent content is 1-10 parts by weight, the filter aid content is 2-10 parts by weight, and the first inorganic binder concentration is 10-40 wt%.
Preferably, the mass ratio of the second inorganic binder to the second refractory filler to the ceramic fibers is (30-60): (20-50): (10-40), wherein the concentration of the second inorganic binder is 10-40 wt%.
Preferably, the composite ceramic fiber is prepared from the following components in percentage by mass (1-5): 1 blown ceramic fibers and spun ceramic fibers.
Preferably, the first refractory filler is selected from one or more of kaolin, magnesium oxide, aluminum hydroxide and attapulgite, the first inorganic binder is selected from one or two of silica sol and aluminum sol, the water repellent is one or two of silicone oil and sodium silicate, and the filter aid is pregelatinized starch.
Preferably, the second inorganic binder is selected from one or two of silica sol and water glass, and the second refractory filler is selected from one or two of silica powder and alumina.
Preferably, the proportion relation between the hydrophobic high-density fiberboard and the inorganic waterproof coating is 1m2：(0.1～1)kg。
The application also provides a preparation method of the composite hydrophobic high-density fiberboard for tunnel fire prevention, which comprises the following steps:
mixing composite ceramic fiber, first refractory filler, first inorganic adhesive, water repellent and water to obtain slurry;
and mixing the slurry with a filter aid to assist filtration, sequentially forming, pressing and drying, and finally coating an inorganic waterproof coating on the surface of the obtained blank to obtain the composite hydrophobic high-density fiberboard.
Preferably, the concentration of the slurry is 1-15 wt%.
Preferably, the thickness of the pressed wet blank is 1-1.2 times of the thickness of the composite hydrophobic high-density fiberboard, and the water content of the pressed wet blank is 40-60 wt%.
The application provides a composite hydrophobic high-density fiberboard for tunnel fire prevention, which is formed by a hydrophobic high-density fiberboard and a coating layer coated on the surface of the hydrophobic high-density fiberboardInorganic waterproof paint composition of the surface; the hydrophobic high-density fiberboard takes composite ceramic fiber as a matrix, and is added with additives such as refractory filler and the like, so that the strength is high, and the density is 800-1000 kg/m3The strength is 8-10 MPa, the fireproof performance is good, the tolerable temperature is 1200 ℃, the smoke generating toxicity is low, and a single-layer structure can be adopted to replace the existing tunnel fireproof plate with a composite structure; meanwhile, the hydrophobic agent is added into the fiber board and the inorganic waterproof coating is coated on the surface of the fiber board, so that the composite hydrophobic high-density ceramic fiber board has the hydrophobic rate of over 99 percent, the inorganic waterproof coating is not aged after being cured for a long time, the service life is prolonged by over 50 percent compared with the prior art, and the composite hydrophobic high-density ceramic fiber board is not deteriorated, mildewproof and safe and applicable to fire prevention in tunnels.
Detailed Description
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to further illustrate features and advantages of the invention, and not to limit the scope of the claims.
In view of the problem that present high density ceramic fiber board is used for tunnel fire prevention and adopts surface spraying fire retardant coating or paste waterproof non-woven fabrics and fire prevention coating easy ageing, the application discloses a compound hydrophobicity high density fiberboard for tunnel fire prevention, it comprises hydrophobic high density fiberboard and surperficial inorganic waterproof coating, the cooperation of above-mentioned two parts makes compound hydrophobicity high density ceramic fiber board have better fire proofness and difficult ageing nature. The embodiment of the invention discloses a composite hydrophobic high-density fiberboard for tunnel fire prevention, which consists of a hydrophobic high-density fiberboard and an inorganic waterproof coating coated on the surface of the hydrophobic high-density fiberboard;
the hydrophobic high-density fiberboard is prepared from composite ceramic fibers, a first refractory filler, a first inorganic adhesive, a water repellent and a filter aid;
the inorganic waterproof coating is prepared from a second inorganic adhesive, a second refractory filler and ceramic fibers.
For the composite hydrophobic high-density fiberboard for tunnel fire protection, itThe hydrophobic high-density fiberboard is prepared from composite ceramic fibers, a first refractory filler, a first inorganic adhesive, a water repellent and a filter aid; the composite ceramic fiber is a composite of an injection ceramic fiber and a spinning ceramic fiber, and the mass ratio of the composite ceramic fiber to the spinning ceramic fiber is (1-5): in a specific embodiment, the mass ratio of the blowing ceramic fibers to the spinning ceramic fibers is (2-4.5): 1, more specifically, the mass ratio of the blown ceramic fibers to the spun ceramic fibers is 2.4:1, 2.5:1, 2.9:1, 3.2:1, 3.5:1, 3.8:1, 4.0:1, or 4.3: 1. The blowing ceramic fiber is prepared by adopting a blowing mode, the blowing mode can adopt the existing process in the prior art, the blowing ceramic fiber has the characteristics of thin fiber diameter and short fiber length, the average diameter is 2-4 mu m, the average length is 10-50 mm, and the main component is Al2O3And SiO2(ii) a The spinning ceramic fiber is prepared by a spinning mode, the spinning mode can adopt the existing process in the prior art, the spinning ceramic fiber has the characteristics of long fiber, thick fiber diameter and high strength, the diameter of the spinning ceramic fiber is 3-5 mu m, the average length of the spinning ceramic fiber is 100-200 mm, and the main component of the spinning ceramic fiber is Al2O3And SiO2(ii) a The invention utilizes the difference of the difference between the fiber length and the fiber diameter of the injected fiber and the melt spun fiber, and the matching mode improves the interweaving strength between the fibers in the slurry, thereby realizing the short-cut processing pretreatment of the fibers, and reducing the rebound resilience of the wet blank after the compression molding. The content of the composite ceramic fiber is 30 to 50 parts by weight, in a specific embodiment, the content of the composite ceramic fiber is 35 to 43 parts by weight, and more specifically, the content of the composite ceramic fiber is 35 parts by weight, 38 parts by weight, 40 parts by weight, 41 parts by weight, or 43 parts by weight.
The first refractory filler is specifically selected from one or more of kaolin, magnesia, alumina, aluminum hydroxide and attapulgite, and in specific embodiments, the first refractory filler is selected from two of kaolin, magnesia, alumina and attapulgite. The first refractory filler is contained in an amount of 30 to 60 parts by weight, and in specific embodiments, the first refractory filler is contained in an amount of 40 to 50 parts by weight, and more specifically, the first refractory filler is contained in an amount of 42 parts by weight, 44 parts by weight, 45 parts by weight, 48 parts by weight, or 50 parts by weight.
The first inorganic binder is selected from one or two of silica sol and aluminum sol with the concentration of 10-40 wt%, and more specifically, the silica sol has the concentration of 14 wt%, 18 wt%, 25 wt%, 30 wt%, 32 wt%, 38 wt% or 40 wt%. The first inorganic binder is contained in an amount of 5 to 10 parts by weight, and in specific embodiments, 6 to 8 parts by weight, and more specifically, 6.3 parts by weight, 6.8 parts by weight, 7.0 parts by weight, 7.1 parts by weight, 7.2 parts by weight, 7.5 parts by weight, or 7.8 parts by weight. The content of the inorganic binder is based on the specific active ingredients.
The water repellent is selected from one or two of silicone oil and sodium silicate. The content of the water repellent is 1-10 parts by weight, in a specific embodiment, the content of the water repellent is 2-7 parts by weight, and more specifically, the content of the water repellent is 3 parts by weight, 4 parts by weight, 6 parts by weight or 7 parts by weight.
The filter aid is specifically selected from pregelatinized starch. The filter aid is present in an amount of 2 to 10 parts by weight, in particular embodiments 3 to 7 parts by weight, more particularly 3.8, 4.5, 5.0, 6.5, or 7 parts by weight.
The inorganic waterproof coating coated on the surface of the hydrophobic high-density fiber board is prepared from a second inorganic adhesive, a second refractory filler and ceramic fibers. More specifically, the second inorganic binder is selected from one or two of silica sol and water glass, and the second refractory filler is selected from one or two of silicon powder and alumina. The mass ratio of the second inorganic binder to the second refractory filler to the ceramic fiber is (30-60): (20-50): (10-40), wherein the concentration of the second adhesive is 10-40 wt%; in a specific embodiment, the mass ratio of the second inorganic binder to the second refractory filler to the ceramic fibers is (35-55): (24-38): (12-35), more specifically, the mass ratio of the second inorganic binder to the second refractory filler to the ceramic fiber is 40:30: 20.
The combination of the second inorganic adhesive, the second refractory filler and the ceramic fiber in the inorganic waterproof coating can ensure that the performance of the coating is optimal, the strength is high, and the coating construction is convenient; if the binding agent amount is large, the solid content of the coating is low, the coating is too thin and is not convenient to coat, and if the binding agent amount is too small, the coating is too viscous and the binding strength is low; the same is true for the other two components.
In the present application, the ratio of the hydrophobic high-density fiberboard to the inorganic waterproof coating is 1m2: (0.1-1) kg, in the specific embodiment, the proportion relation between the hydrophobic high-density fiberboard and the inorganic waterproof coating is 1m2: (0.4-0.8) kg, more specifically, the proportion relation between the hydrophobic high-density fiberboard and the inorganic waterproof coating is 1m2: 0.5kg or 1m2：0.7kg。
The application also provides a preparation method of the composite hydrophobic high-density fiberboard for tunnel fire prevention, which comprises the following steps:
mixing composite ceramic fiber, first refractory filler, first inorganic adhesive, water repellent and water to obtain slurry;
and mixing the slurry with a filter aid to assist filtration, sequentially forming, pressing and drying, and finally coating an inorganic waterproof coating on the surface of the obtained blank to obtain the composite hydrophobic high-density fiberboard.
In the application, in order to fully mix the raw materials, firstly, the composite ceramic fiber is dispersed in water, and then the obtained slurry is mixed with a first refractory filler, a first inorganic adhesive and a water repellent to obtain slurry with the concentration of 1-15 wt%; then adding filter aid into the slurry to assist filtration, so that the ceramic fiber, the refractory filler, the inorganic adhesive and the water repellent are flocculated together, and the water becomes clear. In specific embodiments, the concentration of the slurry is 2-10 wt%, more specifically, the concentration of the slurry is 5 wt%, 7 wt%, 8 wt%, or 9 wt%
According to the invention, the flocculated slurry is subjected to vacuum suction filtration or long-net shoveling and forming, then is pressed into a wet blank with corresponding thickness and density, is conveyed into a drying chamber for drying, is processed after drying, is coated with an inorganic waterproof coating on the surface, and is dried again to obtain the composite hydrophobic high-density fiberboard. In the process, the thickness of the pressed wet blank is 1-1.2 times of that of the composite hydrophobic high-density fiberboard, and the water content of the pressed wet blank is 40-60 wt%; the drying temperature is 90-200 ℃, and the drying time is 3-24 h.
The composite hydrophobic high-density fiberboard provided by the invention has the advantages that the hydrophobic agent is added and the surface of the composite hydrophobic high-density fiberboard is coated with the inorganic waterproof coating, so that the composite hydrophobic high-density ceramic fiberboard has high hydrophobic rate, high strength, good fireproof performance and low smoke production toxicity, adopts a single-layer structure to replace the existing fireproof board with a composite structure, and is suitable for being used as the fireproof board in humid environments such as tunnels and the like.
For further understanding of the present invention, the hydrophobic high-density fiberboard for tunnel fire protection and the preparation method thereof provided by the present invention are described in detail below with reference to the following examples, and the scope of the present invention is not limited by the following examples.
Example 1
(1) Adding 100kg of throwing ceramic fibers into water for dispersion, adding 300kg of blowing ceramic fibers, and uniformly dispersing;
(2) 200kg of kaolin, 200kg of magnesia powder, 210kg of 30% silica sol and 30kg of water repellent are added into the slurry and mixed evenly to prepare 5% slurry;
(3) adding 45kg of filter aid into the uniformly mixed slurry to flocculate the ceramic fibers and the powder together and to clear water;
(4) forming the flocculated slurry by vacuum suction filtration, and pressing to obtain wet blank with corresponding thickness and density (the wet blank is 35mm, and the density is 1700 kg/m)3) Conveying the mixture to a drying chamber for drying, processing the dried mixture into a required size, coating inorganic waterproof paint (prepared from 40kg of silica sol, 30kg of alumina powder and 20kg of ceramic fiber powder) on the surface of the dried mixture, coating 0.5kg of inorganic waterproof paint on each square meter of fiberboard, and drying the inorganic waterproof paint to obtain a composite hydrophobic high-density fiberboard with the thickness of 30mmA ceramic fiber board.
The hydrophobic high-density ceramic fiber board for tunnel fire prevention prepared by the embodiment has the volume density of 850kg/m3The compression strength is 8.3MPa, the hydrophobic rate is 99.3 percent, and the heat-resistant temperature is 1200 ℃.
Example 2
(1) Adding 80kg of throwing ceramic fibers into water for dispersion, adding 350kg of blowing ceramic fibers, and uniformly dispersing;
(2) 220kg of alumina powder, 230kg of attapulgite, 240kg of 30% silica sol and 40kg of water repellent are added into the slurry and mixed evenly to prepare 2% slurry;
(3) adding 50kg of filter aid into the uniformly mixed slurry to flocculate the ceramic fibers and the powder together and to make the water clear;
(4) the flocculated slurry is formed by long net shoveling and then pressed into wet blank with corresponding thickness and density (the wet blank is 45mm, the density is 1850 kg/m)3) And conveying the fiber board to a drying chamber for drying, processing the fiber board into a required size after drying, coating inorganic waterproof paint (prepared from 50kg of silica sol, 20kg of silicon powder and 40kg of ceramic fiber powder) on the surface of the fiber board, coating 0.7kg of inorganic waterproof paint on each square meter of the fiber board, and drying to obtain the 40mm composite hydrophobic high-density ceramic fiber board.
The volume density of the hydrophobic high-density ceramic fiber board for tunnel fire prevention prepared in the embodiment is 930kg/m3The hydrophobic rate is 99.5%, the compression strength is 9MPa, and the heat-resisting temperature is 1200 ℃.
COMPARATIVE EXAMPLE 1 (Using a single ceramic fiber)
(1) Adding 400kg of throwing ceramic fiber into water to be uniformly dispersed;
(2) 200kg of kaolin, 200kg of magnesia powder, 210kg of 30% silica sol and 30kg of water repellent are added into the slurry and mixed evenly to prepare 5% slurry;
(3) adding 45kg of filter aid into the uniformly mixed slurry to flocculate the ceramic fibers and the powder together and to clear water;
(4) forming the flocculated slurry by vacuum suction filtration, and then pressing the slurry to the corresponding thickness and densityWet blank (wet blank is 35mm, density 1700 kg/m)3) And conveying the fiber board to a drying chamber for drying, processing the fiber board into a required size after drying, coating inorganic waterproof paint (prepared from 40kg of silica sol, 30kg of alumina powder and 20kg of ceramic fiber powder) on the surface of the fiber board, coating 0.5kg of inorganic waterproof paint on each square meter of the fiber board, and drying to obtain the composite hydrophobic high-density ceramic fiber board with the thickness of 30 mm.
The volume density of the hydrophobic high-density ceramic fiber board for tunnel fire prevention prepared by the comparative example is 850kg/m3The compression strength is 4MPa, the hydrophobic rate is 98 percent, and the heat-resistant temperature is 1200 ℃.
COMPARATIVE EXAMPLE 2 (addition of Water repellent, addition of Water repellent and Water-proof coating)
(1) Adding 80kg of throwing ceramic fibers into water for dispersion, adding 350kg of blowing ceramic fibers, and uniformly dispersing;
(2) 220kg of alumina powder, 230kg of attapulgite and 240kg of 30% silica sol are added into the slurry and uniformly mixed to prepare 2% slurry;
(3) adding 50kg of filter aid into the uniformly mixed slurry to flocculate the ceramic fibers and the powder together and to make the water clear;
(4) the flocculated slurry is formed by long mesh, and then is pressed into a wet blank with corresponding thickness and density (the wet blank is 45mm, the density is 1950 kg/m)3) And conveying the ceramic fiber board to a drying chamber for drying, and processing the ceramic fiber board into a required size after drying to obtain the 40mm hydrophobic high-density ceramic fiber board.
The volume density of the hydrophobic high-density ceramic fiber board for tunnel fire prevention prepared by the comparative example is 930kg/m3The hydrophobic rate is lower than 50%, the compressive strength is 8.7MPa, and the heat-resisting temperature is 1200 ℃.
COMPARATIVE EXAMPLE 3 (without addition of hydrophober)
(1) Adding 80kg of throwing ceramic fibers into water for dispersion, adding 350kg of blowing ceramic fibers, and uniformly dispersing;
(2) 220kg of alumina powder, 230kg of attapulgite and 240kg of 30% silica sol are added into the slurry and uniformly mixed to prepare 2% slurry;
(3) adding 50kg of filter aid into the uniformly mixed slurry to flocculate the ceramic fibers and the powder together and to make the water clear;
(4) the flocculated slurry is formed by long mesh, and then is pressed into a wet blank with corresponding thickness and density (the wet blank is 45mm, the density is 1950 kg/m)3) Conveying the fiber board to a drying chamber for drying, processing the fiber board into a required size after drying, coating an inorganic waterproof coating (prepared by 50kg of silica sol, 20kg of silicon powder and 40kg of ceramic fiber powder) on the surface of the fiber board, coating 0.7kg of the inorganic waterproof coating on each square meter of the fiber board, and drying to obtain the 40mm composite hydrophobic high-density ceramic fiber board.
The volume density of the hydrophobic high-density ceramic fiber board for tunnel fire prevention prepared by the comparative example is 930kg/m393 percent of hydrophobic rate, 8.8MPa of compressive strength and 1200 ℃ of heat resistance.
Comparative example 4 (surface uncoated inorganic Water-proof paint)
(1) Adding 80kg of throwing ceramic fibers into water for dispersion, adding 350kg of blowing ceramic fibers, and uniformly dispersing;
(2) adding 220kg of alumina powder, 230kg of attapulgite, 240kg of 30% silica sol and 40kg of water repellent into the slurry, and uniformly mixing to prepare 2% slurry;
(3) adding 50kg of filter aid into the uniformly mixed slurry to flocculate the ceramic fibers and the powder together and to make the water clear;
(4) the flocculated slurry is formed by long mesh, and then is pressed into a wet blank with corresponding thickness and density (the wet blank is 45mm, the density is 1950 kg/m)3) And conveying the ceramic fiber board to a drying chamber for drying, and processing the ceramic fiber board into a required size after drying to obtain the 40mm hydrophobic high-density ceramic fiber board.
The volume density of the hydrophobic high-density ceramic fiber board for tunnel fire prevention prepared by the comparative example is 930kg/m395 percent of hydrophobic property, 8.5MPa of compressive strength and 1200 ℃ of heat resistance.
And the comparative example and the effect data of the proportional relation matching of the components in the high-density fiberboard are reflected.
Comparative example 5 (composite ceramic fiber amount out of range)
(1) Adding 180kg of throwing ceramic fibers into water for dispersion, adding 350kg of blowing ceramic fibers, and uniformly dispersing;
(2) 220kg of alumina powder, 230kg of attapulgite, 240kg of 30% silica sol and 40kg of water repellent are added into the slurry and mixed evenly to prepare 2% slurry;
(3) adding 50kg of filter aid into the uniformly mixed slurry to flocculate the ceramic fibers and the powder together and to make the water clear;
(4) the flocculated slurry is taken out by a fourdrinier wire for forming, and then is pressed into a wet blank with corresponding thickness and density (the wet blank is pressed to 45mm, rebounded to 50mm, and the density is 1700 kg/m)3) And conveying the fiber board to a drying chamber for drying, processing the fiber board into a required size after drying, coating inorganic waterproof paint (prepared from 50kg of silica sol, 20kg of silicon powder and 40kg of ceramic fiber powder) on the surface of the fiber board, coating 0.7kg of inorganic waterproof paint on each square meter of the fiber board, and drying to obtain the 40mm composite hydrophobic high-density ceramic fiber board.
The volume density of the hydrophobic high-density ceramic fiber board for tunnel fire prevention prepared in the embodiment is 840kg/m3The hydrophobic rate is 99%, the compression strength is 6MPa, and the heat-resisting temperature is 1200 ℃.
COMPARATIVE EXAMPLE 6 (first refractory Filler amount out of range)
(1) Adding 80kg of throwing ceramic fibers into water for dispersion, adding 350kg of blowing ceramic fibers, and uniformly dispersing;
(2) adding 320kg of alumina powder, 330kg of attapulgite, 240kg of 30% concentration silica sol and 40kg of water repellent into the slurry, and uniformly mixing to prepare 2% concentration slurry;
(3) adding 50kg of filter aid into the uniformly mixed slurry to flocculate the ceramic fibers and the powder together and to make the water clear;
(4) the flocculated slurry is formed by long net, the draining is slowed down during forming, and then the slurry is pressed into a wet blank with corresponding thickness and density (the wet blank is 42mm, the density is 1980 kg/m)3) Conveying into a drying chamber for drying, processing into required size after drying, and coating inorganic waterproof coating (50kg of silica sol, 20kg of silicon powder and 40kg of ceramic fiber) on the surfacePowder preparation), 0.7kg of inorganic waterproof coating is coated on each square meter of the fiberboard, and the composite hydrophobic high-density ceramic fiberboard with the thickness of 40mm is obtained after drying.
The volume density of the hydrophobic high-density ceramic fiber board for tunnel fire prevention prepared by the embodiment is 990kg/m3The hydrophobic rate is 99.5%, the compression strength is 9MPa, and the heat-resisting temperature is 1200 ℃.
Comparative example 7 (first inorganic adhesive amount out of range)
(1) Adding 80kg of throwing ceramic fibers into water for dispersion, adding 350kg of blowing ceramic fibers, and uniformly dispersing;
(2) 220kg of alumina powder, 230kg of attapulgite, 370kg of 30% silica sol and 40kg of water repellent are added into the slurry and mixed evenly to prepare 2% slurry;
(3) and (3) adding 50kg of filter aid into the uniformly mixed slurry, so that the slurry is muddy, the flocculation effect is poor, and no water is drained during forming, so that the forming cannot be carried out.
COMPARATIVE EXAMPLE 8 (Filter aid dosage out of range)
(1) Adding 80kg of throwing ceramic fibers into water for dispersion, adding 350kg of blowing ceramic fibers, and uniformly dispersing;
(2) 220kg of alumina powder, 230kg of attapulgite, 240kg of 30% silica sol and 40kg of water repellent are added into the slurry and mixed evenly to prepare 2% slurry;
(3) the filter aid of 110kg is added into the evenly mixed slurry, the slurry is muddy, the flocculation effect is poor, and no water is drained during forming, so that the forming cannot be carried out.
The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The composite hydrophobic high-density fiberboard for tunnel fire prevention consists of a hydrophobic high-density fiberboard and an inorganic waterproof coating coated on the surface of the hydrophobic high-density fiberboard;
the hydrophobic high-density fiberboard is prepared from composite ceramic fibers, a first refractory filler, a first inorganic adhesive, a water repellent and a filter aid;
the inorganic waterproof coating is prepared from a second inorganic adhesive, a second refractory filler and ceramic fibers.
2. The composite hydrophobic high-density fiberboard of claim 1, wherein the composite ceramic fiber is 30 to 50 parts by weight, the first refractory filler is 30 to 60 parts by weight, the first inorganic binder is 5 to 10 parts by weight, the water repellent is 1 to 10 parts by weight, the filter aid is 2 to 10 parts by weight, and the first inorganic binder is 10 to 40% by weight.
3. The composite hydrophobic high-density fiberboard of claim 1 or 2, wherein the mass ratio of the second inorganic binder, the second refractory filler and the ceramic fiber is (30-60): (20-50): (10-40), wherein the concentration of the second inorganic binder is 10-40 wt%.
4. The composite hydrophobic high-density fiberboard of claim 3, wherein the composite ceramic fiber is prepared by mixing (1-5) by mass: 1 blown ceramic fibers and spun ceramic fibers.
5. The composite hydrophobic high-density fiberboard of claim 3, wherein the first refractory filler is selected from one or more of kaolin, magnesium oxide, aluminum hydroxide and attapulgite, the first inorganic binder is selected from one or two of silica sol and aluminum sol, the water repellent is one or two of silicone oil and sodium silicate, and the filter aid is pregelatinized starch.
6. The composite hydrophobic high density fiberboard of claim 3, wherein the second inorganic binder is selected from one or both of silica sol and water glass, and the second refractory filler is selected from one or both of silica powder and alumina.
7. The composite hydrophobic high density fiberboard of claim 3, wherein the ratio of the hydrophobic high density fiberboard to the inorganic waterproof coating is 1m2：(0.1～1)kg。
8. The method of making the composite hydrophobic high density fiberboard of claim 1 for tunnel fire protection comprising the steps of:
mixing composite ceramic fiber, first refractory filler, first inorganic adhesive, water repellent and water to obtain slurry;
and mixing the slurry with a filter aid to assist filtration, sequentially forming, pressing and drying, and finally coating an inorganic waterproof coating on the surface of the obtained blank to obtain the composite hydrophobic high-density fiberboard.
9. The method according to claim 8, wherein the slurry has a concentration of 1 to 15 wt%.
10. The preparation method according to claim 8, wherein the thickness of the pressed wet blank is 1-1.2 times of the thickness of the composite hydrophobic high-density fiberboard, and the water content of the pressed wet blank is 40-60 wt%.
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| CN115010457A (en) * | 2022-05-09 | 2022-09-06 | 唐山顺浩环保科技有限公司 | Superfine ceramic fiber cotton thermal insulation pipe shell and preparation method thereof |
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| CN107216693A (en) * | 2017-05-19 | 2017-09-29 | 海洋化工研究院有限公司 | Inorganic expansive fireproof coating and preparation method |
| CN108033756A (en) * | 2017-12-12 | 2018-05-15 | 山东鲁阳节能材料股份有限公司 | A kind of high density ceramic fiberboard and preparation method thereof |
| CN109021623A (en) * | 2018-05-21 | 2018-12-18 | 陈炜 | A kind of effectively insulating fire proof and thermo-insulation coating material formula |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107216693A (en) * | 2017-05-19 | 2017-09-29 | 海洋化工研究院有限公司 | Inorganic expansive fireproof coating and preparation method |
| CN108033756A (en) * | 2017-12-12 | 2018-05-15 | 山东鲁阳节能材料股份有限公司 | A kind of high density ceramic fiberboard and preparation method thereof |
| CN109021623A (en) * | 2018-05-21 | 2018-12-18 | 陈炜 | A kind of effectively insulating fire proof and thermo-insulation coating material formula |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115010457A (en) * | 2022-05-09 | 2022-09-06 | 唐山顺浩环保科技有限公司 | Superfine ceramic fiber cotton thermal insulation pipe shell and preparation method thereof |
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