CN110194636B - Fireproof board and preparation method thereof - Google Patents
Fireproof board and preparation method thereof Download PDFInfo
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- CN110194636B CN110194636B CN201910548999.6A CN201910548999A CN110194636B CN 110194636 B CN110194636 B CN 110194636B CN 201910548999 A CN201910548999 A CN 201910548999A CN 110194636 B CN110194636 B CN 110194636B
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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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/10—Lime cements or magnesium oxide cements
- C04B28/105—Magnesium oxide or magnesium carbonate cements
-
- 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
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Building Environments (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a fireproof board and a preparation method thereof. The fireproof board comprises the following raw materials: 20-50 parts by weight of granulated blast furnace slag powder; 20-40 parts by weight of magnesium oxide powder; 2-10 parts of wood pulp fiber; 2-10 parts of expanded perlite; 1-6 parts of brucite; 4-15 parts of wollastonite; 1-5 parts of mica; 1-10 parts by weight of a filler; 1-15 parts of sanding powder and 5-30 parts of magnesium sulfate solution. The invention improves the fire resistance of the fireproof board and reduces the heat conductivity coefficient of the fireproof board.
Description
Technical Field
The invention relates to a fireproof plate and a preparation method thereof.
Background
The fireproof board mainly comprises a glass magnesium fireproof board, a calcium silicate fireproof board, a magnesium oxysulfate fireproof board and the like. Magnesium oxide, magnesium chloride, magnesium oxysulfate cement, fiber and a reinforcing material are mainly adopted as raw materials for the magnesium oxide fireproof plate and the magnesium oxysulfate fireproof plate; the calcium silicate fireproof plate is mainly made of cement, quartz, fiber and the like.
CN106747156A discloses a novel high-performance glass magnesium fireproof plate, which comprises the following components in percentage by mass: 30-35% of magnesium oxide, 45-50% of magnesium chloride and 15-25% of sawdust; the magnesium chloride is blocky and has a content of 95 percent; the sawdust is sawdust without impurities, and the ratio of the sawdust is 10-15%.
CN105541268A discloses a magnesium oxysulfate plate and a preparation method thereof, wherein the magnesium oxysulfate plate comprises the following components in parts by weight: 200-300 parts of magnesium oxysulfate cement, 10-20 parts of alkali-resistant glass fiber, 30-50 parts of aggregate, 10-50 parts of water, 5-10 parts of early strength agent, 5-10 parts of water reducing agent and 20-80 parts of reinforcing material.
CN108069673A discloses a calcium silicate fireproof plate and a preparation method thereof, wherein the calcium silicate fireproof plate comprises the following raw materials in parts by weight: 0.1-80 parts of hydrated calcium silicate; 10-70 parts of quartz; 0-20 parts of cement; 0-20 parts of wood pulp fiber; 10-70 parts of lime; the calcium-silicon ratio of the raw material is 0.1-5.
CN104926236A discloses a preparation method of a low-density fiber-reinforced calcium silicate fireproof plate, which comprises the following steps: step 1, pulping: mixing plant fibers, cement and quartz stone to prepare pulp, wherein the molar ratio of calcium to silicon is 0.80-0.82, and the mass of the plant fibers accounts for 8-12% of the total weight of the raw materials; step 2, plate blank forming: the slurry prepared in the step 1 is filtered by a vacuum system, a thin material layer is wound on a forming cylinder, and the material blank is cut off when the thickness of the material blank reaches a set thickness after being wound by a plurality of layers; step 3, pre-reaction: placing the blank prepared in the step 2 in a reaction kettle, and stably raising the temperature in the kettle to 250 ℃ at a temperature rise rate of 30 ℃/h from the time when steam enters the reaction kettle under the pressure of 1.2 +/-0.1 Mpa in the reaction kettle, and then carrying out constant temperature and pressure maintenance for not less than 24 h; step 4, steam pressure curing: after the pre-reaction is finished, sequentially feeding the blanks into an autoclave, wherein the autoclave pressure is 1.0 +/-0.1 MPa, stably heating to 180-200 ℃ at a heating rate of 40 ℃/h from the time when steam enters the autoclave, maintaining the pressure and keeping the temperature for not less than 15 hours, and then releasing steam for depressurization; and 5, demolding, drying, sanding and trimming to obtain the low-density fiber reinforced calcium silicate fireproof plate.
The fire-proof panels of the above patent documents do not contain light and fire-proof mineral materials, and thus the improvement of fire resistance of the fire-proof panels and the reduction of thermal conductivity of the fire-proof panels are restricted.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a fireproof board, which contains light fireproof mineral materials, thereby improving the fireproof performance of the fireproof board and reducing the thermal conductivity of the fireproof board. Another object of the present invention is to provide a method for preparing a fireproof board, which can prevent the slurry from being adhered due to the rapid reaction between the slurry and the activator.
The invention adopts the following technical scheme to achieve the purpose.
On one hand, the invention provides a fireproof board which is characterized by being prepared from the following raw materials:
wherein the filler is selected from waste materials and/or leftover materials generated in the production process of the fireproof plate.
The fireproof board according to the present invention is preferably made of raw materials comprising the following components:
according to the fireproof board of the invention, preferably, the raw materials further comprise the following components:
wherein the synthetic fibers are selected from one or more of glass fibers, polypropylene fibers and polyvinyl alcohol fibers; the additive is selected from one or more of aluminum trichloride, zinc chloride, calcium carbonate, ammonium dihydrogen phosphate, calcium acetate, ferrous sulfate, boric acid, sodium tetraborate, silicic acid, sodium silicate, sodium stearate and urea.
According to the fireproof board of the invention, preferably, the raw materials further comprise the following components:
according to the fireproof board of the invention, preferably, the raw materials further comprise the following components:
0.1-3 parts by weight of diatomite;
0.1-5 parts by weight of kaolin;
0.1-4 parts by weight of expanded vermiculite.
According to the fireproof board of the invention, preferably, the raw materials further comprise the following components:
1-2.5 parts by weight of diatomite;
1-4 parts of kaolin;
1-3 parts of expanded vermiculite.
On the other hand, the invention provides a preparation method of the fireproof plate, which is characterized by comprising the following steps of:
(1) firstly, mixing wood pulp fibers with water to prepare paper pulp, and then mixing other components except the magnesium sulfate solution and the wood pulp fibers in the raw materials with the paper pulp and the water to form slurry;
(2) and mixing a magnesium sulfate solution serving as an activator with the slurry to form a total material layer, and processing the total material layer to obtain the fireproof board.
According to the production method of the present invention, preferably, in the step (1), a step of forming a slurry layer on the felt through sheet-taking of the slurry is further included.
According to the preparation method of the invention, preferably, in the step (2), the magnesium sulfate solution and the slurry layer are mixed to form a total layer, and the total layer is processed to obtain the fireproof board.
According to the preparation method of the invention, preferably, in the step (2), a magnesium sulfate solution is added to the slurry layer by a spraying manner or a curtain coating manner, so that the magnesium sulfate solution is mixed with the slurry layer to form a total layer, and the total layer is processed to obtain the fireproof board.
The fireproof board disclosed by the invention contains various light fireproof mineral raw materials, so that the fireproof performance of the fireproof board is improved, and the heat conductivity coefficient of the fireproof board is reduced. The preparation method of the invention adopts a step-by-step mixing mode, and can prevent the slurry from being adhered due to the rapid reaction of the slurry and the exciting agent.
Detailed Description
The present invention will be further described with reference to the following specific examples, but the scope of the present invention is not limited thereto.
< fireproof sheet >
The fireproof board comprises the following raw materials: granulated blast furnace slag powder, magnesia powder, wood pulp fiber, expanded perlite, brucite, wollastonite, mica, filler, sanding powder and magnesium sulfate solution.
In the present invention, granulated blast furnace slag powder, magnesia powder, wood pulp fiber, expanded perlite, brucite, wollastonite, mica and sanding powder may be selected from those conventionally used in the art. The fireproof board can be prepared by reacting an excitant with slurry, wherein the granulated blast furnace slag powder, the magnesium oxide powder, the wood pulp fiber, the expanded perlite, the brucite, the wollastonite, the mica, the filler, the sanding powder and the water can form the slurry, and the magnesium sulfate solution as the excitant can excite the hydraulicity of the slurry, accelerate the hydration reaction of the slurry and further improve the strength of the fireproof board. The fireproof board contains various light fireproof mineral raw materials (expanded perlite, brucite, wollastonite and mica), and is beneficial to improving the fireproof performance of the fireproof board and reducing the heat conductivity coefficient of the fireproof board. In addition, the fireproof plate of the invention does not contain asbestos and other harmful substances, and is green and environment-friendly. The fireproof plate of the invention does not add chlorine-containing compounds, thereby avoiding the problems of easy moisture absorption, halogen return and metal corrosion.
The granulated blast furnace slag powder of the present invention is also called granulated blast furnace slag, and is a glassy substance formed in most of the molten slag in the blast furnace iron making process rather than in the crystallization process. The granulated blast furnace slag powder can be 20-50 parts by weight, preferably 23-46 parts by weight, and more preferably 18-36 parts by weight.
In the present invention, the amount of the magnesium oxide powder may be 20 to 40 parts by weight, preferably 23 to 36 parts by weight, and more preferably 18 to 28 parts by weight.
In the present invention, the wood pulp fiber may be 2 to 10 parts by weight, preferably 4 to 8 parts by weight, and more preferably 5 to 7 parts by weight.
In the present invention, the expanded perlite may be present in an amount of 2 to 10 parts by weight, preferably 3 to 8 parts by weight, and more preferably 4 to 6 parts by weight.
The brucite of the invention is also called brucite. The brucite may be in an amount of 1 to 6 parts by weight, preferably 2 to 5 parts by weight, and more preferably 3 to 4 parts by weight.
In the present invention, the wollastonite may be in an amount of 4 to 15 parts by weight, preferably 5 to 12 parts by weight, and more preferably 6 to 10 parts by weight.
In the present invention, mica may be 1 to 5 parts by weight, preferably 2 to 4 parts by weight, and more preferably 2.2 to 3.6 parts by weight.
The filler of the present invention may be selected from the group consisting of waste and/or scrap material produced during the production of fibre-reinforced board, preferably scrap material produced during the production of fibre-reinforced board. The filler may be 1 to 10 parts by weight, preferably 3 to 9 parts by weight, and more preferably 4 to 8 parts by weight.
In the invention, the sanding powder can be 1-15 parts by weight, preferably 3-13 parts by weight, and more preferably 5-10 parts by weight.
The magnesium sulfate solution of the present invention is an aqueous solution. The concentration of the magnesium sulfate solution may be 15 to 25 wt%, preferably 18 to 23 wt%, and more preferably 20 to 21 wt%. The magnesium sulfate solution may be 5 to 30 parts by weight, preferably 9 to 24 parts by weight, and more preferably 13 to 20 parts by weight.
The invention discovers that the components in the proportion are beneficial to improving the fire resistance of the fireproof board and reducing the heat conductivity coefficient of the fireproof board.
In the invention, the fireproof board can be prepared from the following raw materials:
in the present invention, the fireproof board is preferably made of raw materials comprising the following components:
in the present invention, the fireproof board is preferably made of raw materials comprising the following components:
the above-mentioned parts by weight may be based on 100 parts by weight of the fireproof sheet material.
The raw materials of the fireproof board can also comprise at least one of the following components: synthetic fibers, fly ash, silicon micropowder, lithium slag, an additive, diatomite, kaolin and expanded vermiculite. The invention discovers that the fire resistance of the fireproof board can be further improved and the thermal conductivity coefficient of the fireproof board can be reduced by adding the mineral raw materials (diatomite, kaolin or expanded vermiculite) in addition to the expanded perlite, the brucite, the wollastonite and the mica.
The synthetic fiber of the present invention may be selected from one or more of glass fiber, polypropylene fiber, and polyvinyl alcohol fiber; preferably polyvinyl alcohol fibres. The synthetic fiber may be 0.1 to 5 parts by weight, preferably 1 to 4 parts by weight, and more preferably 2 to 3 parts by weight.
In the present invention, the fly ash may be 0.1 to 8 parts by weight, preferably 1 to 6 parts by weight, and more preferably 2 to 5 parts by weight.
In the invention, the silicon micropowder is an inorganic non-metallic material which is non-toxic, tasteless and pollution-free. The amount of the fine silica powder may be 0.1 to 3 parts by weight, preferably 1 to 2.5 parts by weight, and more preferably 1.2 to 2.2 parts by weight.
In the invention, the lithium slag is from the lithium salt production process and is divided into acid slag and alkaline slag. The acid lithium slag is the waste slag generated in the production of lithium carbonate by a sulfuric acid method. The amount of the lithium slag may be 0.1 to 3 parts by weight, preferably 1 to 2.5 parts by weight, and more preferably 1.2 to 2.2 parts by weight.
The additive of the invention can be selected from one or more of aluminum trichloride, zinc chloride, calcium carbonate, ammonium dihydrogen phosphate, calcium acetate, ferrous sulfate, boric acid, sodium tetraborate, silicic acid, sodium silicate, sodium stearate and urea; preferably one or more selected from the group consisting of aluminum trichloride, zinc chloride, calcium carbonate, ammonium dihydrogen phosphate and calcium acetate; more preferably one or more selected from the group consisting of aluminum trichloride, zinc chloride and calcium carbonate. The additive may be 0.1 to 2 parts by weight, preferably 0.5 to 1.5 parts by weight, and more preferably 0.8 to 1.2 parts by weight.
In the present invention, the diatomaceous earth may be present in an amount of 0.1 to 3 parts by weight, preferably 1 to 2.5 parts by weight, and more preferably 1.2 to 2.2 parts by weight.
In the present invention, the kaolin may be 0.1 to 5 parts by weight, preferably 1 to 4 parts by weight, and more preferably 1.5 to 3.5 parts by weight.
In the present invention, the amount of the expanded vermiculite may be 0.1 to 4 parts by weight, preferably 1 to 3 parts by weight, and more preferably 1.5 to 2.5 parts by weight.
The components in the proportion are beneficial to further improving the fire resistance of the fireproof board and reducing the heat conductivity coefficient of the fireproof board.
According to some embodiments of the present invention, the raw material of the fireproof board of the present invention further comprises the following components: synthetic fiber, fly ash, silicon micropowder, lithium slag and an additive.
In the present invention, the raw materials of the fireproof board preferably further include the following components:
in the present invention, the raw materials of the fireproof board more preferably further include the following components:
in the present invention, the raw materials of the fireproof board more preferably further include the following components:
the above-mentioned parts by weight may be based on 100 parts by weight of the fireproof sheet material.
According to other embodiments of the present invention, the raw material of the fireproof board of the present invention further comprises the following components: diatomaceous earth, kaolin clay, and exfoliated vermiculite.
In the present invention, the raw materials of the fireproof board preferably further include the following components:
0.1-3 parts by weight of diatomite;
0.1-5 parts by weight of kaolin;
0.1-4 parts by weight of expanded vermiculite.
In the present invention, the raw materials of the fireproof board more preferably further include the following components:
1-2.5 parts by weight of diatomite;
1-4 parts of kaolin;
1-3 parts of expanded vermiculite.
In the present invention, the raw materials of the fireproof board more preferably further include the following components:
1.2-2.2 parts by weight of diatomite;
1.5-3.5 parts by weight of kaolin;
1.5-2.5 parts by weight of expanded vermiculite.
The above-mentioned parts by weight may be based on 100 parts by weight of the fireproof sheet material.
< preparation method >
The preparation method of the fireproof board comprises the following steps: (1) forming a slurry; (2) forming a total material layer; (3) and (5) forming the fireproof board.
The fireproof board comprises the following raw materials: granulated blast furnace slag powder, magnesia powder, wood pulp fiber, expanded perlite, brucite, wollastonite, mica, filler, sanding powder and magnesium sulfate solution. The raw materials of the fireproof board can also comprise at least one of the following components: synthetic fibers, fly ash, silicon micropowder, lithium slag, an additive, diatomite, kaolin and expanded vermiculite. The components and the parts by weight thereof are as described above and are not described in detail.
In the step (1), pulp is prepared by mixing wood pulp fibers with water, and then the other components of the raw materials except the magnesium sulfate solution and the wood pulp fibers are mixed with the pulp and the water to form slurry. Preferably, the step (1) further comprises a step of forming a slurry layer on the felt through papermaking of the slurry. The components do not contain an excitant, so that slurry adhesion cannot occur in the slurry forming process.
In step (2), a magnesium sulfate solution is mixed with the slurry to form a total layer. The magnesium sulfate solution of the present invention is an aqueous solution. Preferably, a magnesium sulfate solution is added to the slurry, and the magnesium sulfate solution is mixed with the slurry to form a total layer. More preferably, the slurry is first formed on the felt by sheet-making, and then a magnesium sulfate solution is mixed with the slurry to form a total layer. The concentration and weight parts of the magnesium sulfate solution are as described above and are not described in detail. The magnesium sulfate solution is used as an activator, so that the hydraulicity of the slurry can be activated, the hydration reaction of the slurry is accelerated, and the strength of the fireproof plate is further improved. The magnesium sulfate solution is preferably added by spraying or curtain coating. The addition mode of spraying or curtain coating is favorable for preventing the slurry adhesion caused by the rapid reaction of the exciting agent and the slurry or the slurry layer.
In the step (3), the total material layer is processed to obtain the fireproof plate. Preferably, the total layer forms a slab, which forms the fire-proof board. The fireproof board is an inorganic mineral fireproof board. The total material layer is preferably formed into a slab by means of a forming device. The plate blank is preferably subjected to saturated steam hydrothermal curing to form the fireproof plate. The forming apparatus may be conventional in the art, preferably a forming drum. The thickness of the plate blank can be 8-25 mm, preferably 10-20 mm, and more preferably 12-15 mm.
According to some embodiments of the invention, the preparation method of the invention comprises the following specific steps:
(1) firstly, mixing and grinding wood pulp fibers and water to prepare paper pulp, then mixing other components except the magnesium sulfate solution and the wood pulp fibers in the raw materials with the paper pulp and the water to form slurry, and forming a slurry layer on the felt by papermaking of the slurry;
(2) adding a magnesium sulfate solution onto the slurry layer in a spraying manner, and mixing the magnesium sulfate solution and the slurry layer to react to form a total material layer;
(3) and forming the total material layer into a plate blank by using forming equipment, and curing the plate blank by using saturated steam to form the fireproof plate.
According to still other embodiments of the present invention, the preparation method of the present invention comprises the following specific steps:
(1) mixing and grinding wood pulp fiber and water to prepare paper pulp, premixing synthetic fiber, sanding powder, wollastonite, perlite, fly ash and water to form premix, mixing other components except magnesium sulfate solution, wood pulp fiber, synthetic fiber, sanding powder, wollastonite, perlite and fly ash in the raw materials with the paper pulp, the premix and the water to form slurry, and copying the slurry to form a slurry layer on the felt;
(2) adding a magnesium sulfate solution onto the slurry layer in a spraying manner, and mixing the magnesium sulfate solution and the slurry layer to react to form a total material layer;
(3) and forming the total material layer into a plate blank by using forming equipment, and curing the plate blank by using saturated steam to form the fireproof plate.
According to still further embodiments of the present invention, the preparation method of the present invention comprises the following specific steps:
(1) firstly, mixing and grinding wood pulp fibers and water to prepare paper pulp, then mixing other components except the magnesium sulfate solution and the wood pulp fibers in the raw materials with the paper pulp and the water to form slurry, and forming a slurry layer on the felt by papermaking of the slurry;
(2) adding a magnesium sulfate solution onto the slurry layer in a curtain coating mode, and mixing the magnesium sulfate solution and the slurry layer to react to form a total material layer;
(3) and forming the total material layer into a plate blank by using forming equipment, and carrying out hydrothermal curing on the plate blank by using saturated steam to form the fireproof plate.
"parts" in the following examples and comparative examples represent parts by weight unless otherwise specified.
The performances of the fireproof boards in the following examples and the boards in the comparative examples are measured by GB28376-2012 'tunnel fireproof protection board' and GA160-2004 'non-combustible inorganic composite board'.
Some of the raw materials in the following examples and comparative examples are illustrated below:
the concentration of the magnesium sulfate solution is 20 wt%;
the synthetic fiber is polyvinyl alcohol fiber;
the filler of the embodiment 1-4 is leftover materials generated in the production process of the fireproof board;
the fillers of comparative examples 1 to 4 are scrap materials generated in the production process of the sheet material.
Examples 1 to 4
A fire-retardant sheet material comprising the raw materials as shown in table 1.
TABLE 1 raw materials for fire-proof panels
Note that: "- - - -" represents that the component is not contained.
The preparation method of the fireproof board comprises the following steps:
(1) according to the formula shown in table 1, wood pulp fiber and 60kg of water are mixed and ground to prepare paper pulp, then other components except the wood pulp fiber and magnesium sulfate solution in the raw materials are mixed with the paper pulp and 1500kg of water to form pulp, and the pulp adhesion phenomenon does not occur in the mixing process; the pulp is taken to form a pulp layer on the felt;
(2) adding a magnesium sulfate solution to the slurry layer in a spraying manner according to a formula shown in Table 1, and mixing the magnesium sulfate solution and the slurry layer to react to form a total material layer; slurry adhesion does not occur in the process of mixing the magnesium sulfate solution and the total material layer;
(3) the total material layer is formed into a plate blank through a forming cylinder, and the plate blank is subjected to saturated steam hydrothermal curing to form the fireproof plate. The properties of the fire-retardant sheet are shown in Table 3.
Comparative examples 1 to 4
A panel comprising the raw materials as shown in table 2.
TABLE 2 raw materials for sheet materials
Note that: "- - - -" represents that the component is not contained.
The preparation method of the plate comprises the following steps:
(1) according to the formula shown in table 2, firstly, wood pulp fibers and 60kg of water are mixed and ground to prepare paper pulp, then, other components except the wood pulp fibers in the raw materials are mixed with the paper pulp and 1500kg of water to form slurry, a magnesium sulfate solution and other components react rapidly in the mixing process to cause the slurry to be adhered, and the slurry is copied on the felt to form a slurry layer;
(2) and forming a plate blank by the slurry layer through a forming cylinder, and carrying out hydrothermal curing on the plate blank by saturated steam to form a plate. The properties of the panels are shown in Table 3.
TABLE 3 Properties of the sheets
| Numbering | Density (g/cm)3) | Thermal conductivity (W/(m.K)) | Fire resistance |
| Example 1 | 1.05 | 0.15 | Limit of fire resistance 240 min |
| Example 2 | 1.1 | 0.12 | Limit of fire resistance 240 min |
| Example 3 | 0.9 | 0.13 | Limit of fire resistance 240 min |
| Example 4 | 1.0 | 0.11 | Limit of fire resistance 240 min |
| Comparative example 1 | 1.2 | 0.24 | Limit of refractoriness 160 minutes |
| Comparative example 2 | 1.22 | 0.25 | Limit of refractoriness 160 minutes |
| Comparative example 3 | 1.18 | 0.21 | Limit of refractoriness 160 minutes |
| Comparative example 4 | 1.19 | 0.22 | Limit of refractoriness 160 minutes |
The present invention is not limited to the above-described embodiments, and any variations, modifications, and substitutions which may occur to those skilled in the art may be made without departing from the spirit of the invention.
Claims (4)
1. The preparation method of the fireproof board is characterized by comprising the following steps:
(1) firstly, mixing wood pulp fibers with water to prepare paper pulp, and then mixing other components except the magnesium sulfate solution and the wood pulp fibers in the raw materials with the paper pulp and the water to form slurry;
(2) mixing a magnesium sulfate solution serving as an activator with the slurry to form a total material layer, and processing the total material layer to obtain the fireproof board;
the fireproof board is prepared from the following raw materials:
wherein the filler is selected from waste materials and/or leftover materials generated in the production process of the fireproof plate; the synthetic fiber is selected from one or more of glass fiber, polypropylene fiber and polyvinyl alcohol fiber; the additive is selected from one or more of aluminum trichloride, zinc chloride, calcium carbonate, ammonium dihydrogen phosphate, calcium acetate, ferrous sulfate, boric acid, sodium tetraborate, silicic acid, sodium silicate, sodium stearate and urea.
2. The production method according to claim 1, further comprising a step of forming a slurry layer on the felt by papermaking the slurry in step (1).
3. The method according to claim 2, wherein in the step (2), the magnesium sulfate solution is mixed with the slurry layer to form a total layer, and the total layer is processed to obtain the fireproof board.
4. The preparation method according to claim 2 or 3, wherein in the step (2), a magnesium sulfate solution is added to the slurry layer by a spraying method or a curtain coating method, so that the magnesium sulfate solution is mixed with the slurry layer to form a total layer, and the total layer is processed to obtain the fireproof board.
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| CN111270952A (en) * | 2020-03-27 | 2020-06-12 | 浙江宝盛塑业有限公司 | PVC folding door and preparation method thereof |
| CN111499315A (en) * | 2020-04-20 | 2020-08-07 | 全球能源互联网研究院有限公司 | High-temperature-resistant fireproof material and preparation method and application thereof |
| CN112497862A (en) * | 2020-11-25 | 2021-03-16 | 湖北达权绿色房屋建材集团有限公司 | Fireproof plate and preparation method thereof |
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