CN118047589A - Fiber reinforced magnesium sulfate fireproof plate and preparation method thereof - Google Patents

Fiber reinforced magnesium sulfate fireproof plate and preparation method thereof Download PDF

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Publication number
CN118047589A
CN118047589A CN202410264991.8A CN202410264991A CN118047589A CN 118047589 A CN118047589 A CN 118047589A CN 202410264991 A CN202410264991 A CN 202410264991A CN 118047589 A CN118047589 A CN 118047589A
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magnesium sulfate
curing
water
powder
glass fiber
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陈荣财
陈果
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Hangzhou Tianli Energy Saving Technology Co ltd
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Hangzhou Tianli Energy Saving Technology Co ltd
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Priority to CN202410264991.8A priority Critical patent/CN118047589A/en
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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
    • C04B28/30—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 magnesium cements or similar cements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
    • B32B13/14—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • B32B2307/734—Dimensional stability
    • 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
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
    • 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
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention discloses a fiber reinforced magnesium sulfate fireproof plate and a preparation method thereof, wherein the fireproof plate comprises the following raw materials in percentage by weight: 60-78% of light burned magnesia powder, 7-9% of magnesium sulfate heptahydrate solution, 3-10% of citric acid, 4-10% of plant fiber, namely bamboo powder and 6-13% of high-resistant Wen Zhenzhu rock; the rest of water; totaling 100%; the preparation method comprises the following steps: a) Placing light burned magnesia powder, a magnesium sulfate heptahydrate solution, citric acid, plant fibers (bamboo powder) and Gao Wenzhu-resistant rock powder and water into an intelligent stirrer to be stirred into slurry at regular time; b) The assembly line enters a die for forming; c) Curing and solidifying for many times in a greenhouse; d) Demolding and cutting; e) Sanding for several times to obtain the finished product. The fireproof plate disclosed by the invention is light in weight, sound-proof, heat-insulating and fireproof, improves the fire-proof limit level of fire protection, and is an explosion-proof, explosion-venting and fireproof fire-protection preferable product.

Description

Fiber reinforced magnesium sulfate fireproof plate and preparation method thereof
Technical Field
The invention relates to a plate and a preparation method thereof, in particular to a fiber reinforced magnesium sulfate fireproof plate and a preparation method thereof, wherein the plate meets the requirements of environmental protection, energy conservation and emission reduction (strong toughness, light weight, sound insulation, heat insulation and fire prevention) of building materials, can improve fire-proof limit level, and is a preferable product for explosion prevention, explosion venting and fire prevention.
Background
The existing glass magnesium fireproof plate in the market has the defects of frosting, cracking, deformation, large corrosion to metal and the like in the use process. The fireproof plate of the calcium silicate plate has the problems of hardness (cutting by a cutting machine, exceeding dust standard, protruding plate surface of a screw), brittleness (easy fracture, increased loss), heaviness (increased construction difficulty and increased load), easy cracking at high temperature and the like in the use process.
Disclosure of Invention
The invention aims to provide a fiber reinforced magnesium sulfate fireproof plate which is a building material meeting the requirements of environmental protection, energy conservation and emission reduction of the building material and capable of improving fire-fighting fire-resistant limit level, and a preparation method thereof, so as to make up the defects of the prior material technology and solve the problems of defects and the like; to promote and optimize the building material.
The specific technical scheme for realizing the aim of the invention is as follows:
The fiber reinforced magnesium sulfate fireproof plate comprises the following raw materials in percentage by weight: 60-78% of light burned magnesia powder, 7-9% of magnesium sulfate heptahydrate solution, 3-10% of citric acid, 4-10% of plant fiber, namely bamboo powder and 6-13% of high-resistant Wen Zhenzhu rock; the rest of water; totaling 100%;
the preparation of the fiber reinforced magnesium sulfate fireproof plate comprises the following specific steps:
a) Taking light burned magnesia powder, a magnesium sulfate heptahydrate solution, citric acid and water accounting for 10% of the raw materials, and putting the materials into a stirrer to stir into slurry serving as a base material; mixing light burned magnesia powder, magnesium sulfate heptahydrate solution and citric acid water accounting for 90% of the rest raw materials, and adding plant fiber, namely bamboo powder, high temperature resistant perlite and water in proportion, and stirring into slurry by a stirrer; as a middle material and a fabric; filtering the base material with a 20-mesh sieve; filtering the fabric by using a sieve with 5mm multiplied by 5mm sieve holes; the middle material is not required to be filtered; the density was controlled at: and (3) backing materials: 1.8-1.82g/cm 3, medium: 1.0-1.02g/cm 3, face fabric: 1.4-1.42g/cm 3;
b) Pouring the base material into a template, wherein the thickness of the template is 0.3-0.4mm, and paving a layer of glass fiber mesh cloth; pouring a middle material, and paving two layers of glass fiber mesh cloth; pouring the fabric, and paving a layer of glass fiber mesh cloth, wherein the overall thickness of the glass fiber mesh cloth is 0.5-0.7mm greater than the preset thickness of the product; performing slurry forming to obtain a first plate blank;
c) And (3) primary curing: the first slab is sent into a curing kiln, a curing kiln door is closed, steam and water vapor are introduced into the curing kiln after 3-5 hours, the temperature is raised, the slab reacts spontaneously, and the temperature of the curing kiln is controlled at 25-35 ℃; curing for 20-24 hours, and demolding to obtain a second plate blank;
d) And (3) curing for the second time: the second slab is sent into a curing kiln, the temperature of the curing kiln is controlled at 45-53 ℃ and the curing time is 40-48 hours, and a third slab is prepared;
e) And (3) curing for the third time: the third slab is sent into a curing kiln, the temperature of the curing kiln is controlled between 32 ℃ and 43 ℃ and kept stable; curing for 48-72 hours in a heat-preserving environment, wherein the strength meets the cutting requirement, and a fourth plate blank is prepared;
f) Trimming and sanding: the diagonal error of the manufactured fourth plate blank is less than or equal to 2mm; the length-width error is less than or equal to 2mm; before sanding, measuring the thickness of the plate by using a caliper, and then adjusting the sanding thickness, wherein the sanding amount is not more than 0.3mm each time; after sanding, checking thickness deviation to be +/-0.15 mm by using a caliper; the fiber reinforced magnesium sulfate fireproof plate is prepared.
The fineness of the light burned magnesia powder is 80 mu m, the active MgO content is more than or equal to 85 percent, and the coagulation time is as follows: the initial setting is not earlier than 45min, and the final setting is not later than 6h; the concentration of the magnesium sulfate heptahydrate solution is more than or equal to 99.5%; the citric acid content of the water citric acid is 99.5%; the plant fiber is bamboo powder, the grain diameter is mesh number is 40-60, the water content is less than or equal to 8% by weight, and the humidity is 17% +/-3%; the glass fiber net, the bottom surface and the surface are made of glass fiber cloth, and no splicing section is allowed; the two middle layers are reinforced with glass fiber mesh cloth, and the allowable deviation of the width is +/-1.0%; the allowable deviation of the warp and weft densities is +/-8.0 percent; the combustible content is not less than 20%; the retention rate of the alkali-resistant tensile breaking strength is not less than 50%; the grain size of the high-temperature-resistant perlite powder is 20-30 meshes.
The invention has the following beneficial effects:
Compared with the existing fireproof plate, the fiber reinforced magnesium sulfate fireproof plate has the advantages of no halogen return, no formaldehyde, no toxicity, no smoke and no harm after combustion, light weight, strong toughness and high strength, good fireproof, high temperature resistant, heat insulating and sound absorbing effects, stable size and easy processing. The fire-proof plate improves the fire-proof limit level of fire protection, and is an explosion-proof, explosion venting and fire-proof fire-protection preferable product.
Drawings
FIG. 1 is a process flow diagram of an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. The embodiments of the invention generally described and illustrated herein may be designed in a wide variety of different configurations. The detailed description of the embodiments of the invention provided below is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention relates to a fiber reinforced magnesium sulfate fireproof plate, which comprises the following raw materials in mass and weight (proportion):
60-65% of light burned magnesia powder; the method meets the relevant standards of the high-class products of WB/T1019-2002 light-burned magnesia for magnesite products. The same batch of light burned magnesia should have the same color and not be allowed to get damp and agglomerate. Fineness was expressed by a residual ratio of 80 μm square-hole sieve (180 mesh) and 125 μm square-hole sieve (120 mesh). The sieving rate of the superior product and the first-class product is 80 mu m, the sieving rate of the square hole sieve is not more than 10 percent, and the sieving rate of the qualified product and the square hole sieve is not more than 3 percent. The active MgO content is particularly important and the sample assay must be adhered to. The invention uses light burned magnesia with QM-85 brand. Setting time, initial setting time is not earlier than 45min, and final setting time is not later than 6h. Stability, test by the coupon method must be acceptable. 10-15% of magnesium sulfate heptahydrate solution, wherein omega/% > of magnesium sulfate (calculated by MgSO4.7H20) is more than or equal to 99.5; 5-10% of water citric acid; the citric acid content is 99.5%; 7-10% of plant fiber (bamboo powder); particle diameter (mesh number) 40-60, water content (by weight) less than or equal to 8%; the ratio of the coarse saw dust to the fine saw dust is 30% -40%, the mud (sand) content is less than or equal to 1%, and the humidity is 17% +/-3%; four layers of glass fiber mesh cloth (medium alkali gluing); the performance index of the product meets the relevant standard of WB/T1036-2006 glass fiber cloth for magnesite products. Appearance quality glass fiber cloth cover defect deduction: the average score per square meter is not more than 0.4 score; the ratio of the length of the glass fiber cloth to the false cutting times is not less than 25 m/time; no segments are allowed. The middle two layers are used for reinforcing glass fiber mesh cloth part 2: the performance index of the polymer-based glass fiber mesh cloth for external wall external heat preservation accords with JC/T561.2-2006 glass fiber mesh cloth for reinforcement part 2: the polymer-based glass fiber mesh cloth for external wall external heat preservation. The allowable deviation of the width is +/-1.0%; the allowable deviation of the warp and weft densities is +/-8.0 percent; the combustible content should be not less than 20%; the retention rate of the alkali-resistant tensile breaking strength is not less than 50%, and the glass fiber mesh cloth is white in appearance and uniform in longitude and latitude; all adjacent defects should be calculated respectively, and when the lengths of the intermittent or scattered defects are measured according to the main defects mixed together, the total length of the intermittent or scattered defects is taken out, wherein the distance is below 10 m; five minor defects are counted as one major defect, and the number of major defects per hundred square meters is not more than 8, so that defects which are not allowed to occur. 8-10% of high-temperature-resistant perlite powder. The raw materials are all commercially available.
Example 1
Referring to fig. 1, the specific steps of this embodiment are as follows:
i) Preparing raw materials: 60% of light burned magnesia powder; 9% of magnesium sulfate heptahydrate solution and 7% of water citric acid; 10% of plant fiber (bamboo powder); 10% of high-temperature-resistant perlite powder; 4% of water; totaling 100%;
ii) taking light burned magnesia powder, a magnesium sulfate heptahydrate solution and 10% of water citric acid in the raw materials, and putting the materials into a stirrer to stir into slurry serving as a base material; placing light burned magnesia powder, a magnesium sulfate heptahydrate solution, the rest 90% of water citric acid, plant fibers, namely bamboo powder, high-temperature-resistant perlite and water into a stirrer to be stirred into slurry; as a middle material and a fabric; filtering the base material with a 20-mesh sieve; filtering the fabric by using a sieve with 5mm multiplied by 5mm sieve holes; the middle material is not required to be filtered; the density was controlled at: and (3) backing materials: 1.82g/cm 3, medium: 1.02g/c m g/c 3, fabric: 1.42g/cm 3;
iii) Pouring the base material into a template with the thickness of 0.4mm, and paving a layer of glass fiber mesh cloth; pouring a middle material, wherein the thickness is 4.8mm, and paving two layers of reinforced glass fiber mesh cloth; pouring the fabric with the thickness of 3.5mm, paving a layer of glass fiber mesh cloth, and performing pulp forming to prepare a first plate blank;
iv) first curing: the first slab is sent into a curing kiln, a curing kiln door is closed, steam and water are introduced into the curing kiln after 3 hours, the temperature is raised, the slab reacts spontaneously, and the temperature of the curing kiln is controlled at 30 ℃; curing for 22 hours, and demolding to obtain a second plate blank;
v) second curing: the second slab is sent into a curing kiln, the temperature of the curing kiln is controlled at 48 ℃, and the curing time is 48 hours, so that a third slab is prepared;
vi) third curing: the third slab is sent into a curing kiln, the temperature of the curing kiln is controlled at 40 ℃ and kept stable; curing for 50 hours in a heat-preserving environment, wherein the strength meets the cutting requirement, and a fourth plate blank is prepared;
f) Trimming and sanding: the diagonal error of the manufactured fourth plate blank is less than or equal to 2mm; the length-width error is less than or equal to 2mm; before sanding, measuring the thickness of the plate by using a caliper, and then adjusting the sanding thickness, wherein the sanding amount is not more than 0.3mm each time; after sanding, checking thickness deviation to be +/-0.15 mm by using a caliper; 2440 x 1220 x 8mm of fiber reinforced magnesium sulfate fireproof plate is prepared.
The fiber reinforced magnesium sulfate fireproof plate prepared by the embodiment is detected to have the flexural strength reaching 11.8Mpa (more than or equal to 8.0 Mpa) and the impact strength reaching 5.3KJ/m2 (more than or equal to 2.0KJ/m 2) according to JC688-2006 glass magnesium plate, the screw holding force reaching 27N/m (more than or equal to 15N/m) and no water drop and no moisture regain. The plate has no cracking and deformation phenomenon at the temperature of-18 ℃.
Example 2
I) Preparing raw materials: 70% of light burned magnesia powder; 9% of magnesium sulfate heptahydrate solution and 3% of water citric acid; plant fiber (bamboo powder) 8%; 6% of high-temperature-resistant perlite powder; 4% of water; totaling 100%;
ii) taking light burned magnesia powder, a magnesium sulfate heptahydrate solution and 10% of water citric acid in the raw materials, and putting the materials into a stirrer to stir into slurry serving as a base material; placing light burned magnesia powder, a magnesium sulfate heptahydrate solution, the rest 90% of water citric acid, plant fibers, namely bamboo powder, high-temperature-resistant perlite and water into a stirrer to be stirred into slurry; as a middle material and a fabric; filtering the base material with a 20-mesh sieve; filtering the fabric by using a sieve with 5mm multiplied by 5mm sieve holes; the middle material is not required to be filtered; the density was controlled at: and (3) backing materials: 1.8g/cm 3, medium: 1.0g/cm 3, face fabric: 1.4g/cm 3;
iii) Pouring the base material into a template with the thickness of 0.3mm, and paving a layer of glass fiber mesh cloth; pouring a middle material, wherein the thickness is 3mm, and paving two layers of reinforced glass fiber mesh cloth; pouring the fabric with the thickness of 2.2mm, paving a layer of glass fiber mesh cloth, and performing pulp forming to prepare a first plate blank;
iv) first curing: the first slab is sent into a curing kiln, a curing kiln door is closed, steam and water are introduced into the curing kiln after 5 hours, the temperature is raised, the slab reacts spontaneously, and the temperature of the curing kiln is controlled at 25 ℃; curing for 24 hours, and demolding to obtain a second plate blank;
v) second curing: the second slab is sent into a curing kiln, the temperature of the curing kiln is controlled at 53 ℃, and the curing time is 40 hours, so that a third slab is prepared;
vi) third curing: the third slab is sent into a curing kiln, the temperature of the curing kiln is controlled at 43 ℃ and kept stable; curing for 48 hours in a heat-preserving environment, wherein the strength meets the cutting requirement, and a fourth plate blank is prepared;
f) Trimming and sanding: the diagonal error of the manufactured fourth plate blank is less than or equal to 2mm; the length-width error is less than or equal to 2mm; before sanding, measuring the thickness of the plate by using a caliper, and then adjusting the sanding thickness, wherein the sanding amount is not more than 0.3mm each time; after sanding, checking thickness deviation to be +/-0.15 mm by using a caliper; 2440 x 1220 x 5mm fiber reinforced magnesium sulfate fire-proof plate is prepared.
The fiber reinforced magnesium sulfate fireproof plate prepared by the embodiment is detected to have the flexural strength of 8.3Mpa (more than or equal to 8.0 Mpa) and the impact strength of 3.3KJ/m2 (more than or equal to 2.0KJ/m 2) according to JC688-2006 glass magnesium plate, the screw holding force of 18N/m (more than or equal to 15N/m) is qualified, and the halogen return resistance of no water drop and no moisture regain is achieved. The plate has no cracking and deformation phenomenon at the temperature of-18 ℃.
Example 3
I) Preparing raw materials: 78% of light burned magnesia powder; 7% of magnesium sulfate heptahydrate solution and 3% of water citric acid; 4% of plant fibers (bamboo powder); 6% of high-temperature-resistant perlite powder; 2% of water; totaling 100%;
ii) taking light burned magnesia powder, a magnesium sulfate heptahydrate solution and 10% of water citric acid in the raw materials, and putting the materials into a stirrer to stir into slurry serving as a base material; placing light burned magnesia powder, a magnesium sulfate heptahydrate solution, the rest 90% of water citric acid, plant fibers, namely bamboo powder, high-temperature-resistant perlite and water into a stirrer to be stirred into slurry; as a middle material and a fabric; filtering the base material with a 20-mesh sieve; filtering the fabric by using a sieve with 5mm multiplied by 5mm sieve holes; the middle material is not required to be filtered; the density was controlled at: and (3) backing materials: 1.8g/cm 3, medium: 1.0g/cm 3, face fabric: 1.4g/cm 3;
iii) Pouring the base material into a template with the thickness of 0.35mm, and paving a layer of glass fiber mesh cloth; pouring a middle material, wherein the thickness is 2mm, and paving two layers of reinforced glass fiber mesh cloth; pouring the fabric with the thickness of 1.2mm, paving a layer of glass fiber mesh cloth, and performing pulp forming to prepare a first plate blank;
iv) first curing: the first slab is sent into a curing kiln, a curing kiln door is closed, steam and water are introduced into the curing kiln after 4 hours, the temperature is raised, the slab reacts spontaneously, and the temperature of the curing kiln is controlled at 30 ℃; curing for 22 hours, and demolding to obtain a second plate blank;
v) second curing: the second slab is sent into a curing kiln, the temperature of the curing kiln is controlled at 50 ℃, and the curing time is 45 hours, so that a third slab is prepared;
vi) third curing: the third slab is sent into a curing kiln, the temperature of the curing kiln is controlled at 32 ℃ and kept stable; curing for 72 hours in a heat-preserving environment, wherein the strength meets the cutting requirement, and a fourth plate blank is prepared;
f) Trimming and sanding: the diagonal error of the manufactured fourth plate blank is less than or equal to 2mm; the length-width error is less than or equal to 2mm; before sanding, measuring the thickness of the plate by using a caliper, and then adjusting the sanding thickness, wherein the sanding amount is not more than 0.3mm each time; after sanding, checking thickness deviation to be +/-0.15 mm by using a caliper; 2440 x 1220 x 3mm fiber reinforced magnesium sulfate fire-proof plate is prepared.
The fiber reinforced magnesium sulfate fireproof board prepared by the detection method achieves no water drop and no moisture regain in the halogen return resistance. The plate has no cracking and deformation phenomenon at minus 18 ℃.
Comparative example 1
The specification of the silicate fireproof plate prepared by the prior commercial silicate fireproof plate is 2440 x 1220 x 9mm, the combustion melting point of cement is about 1300 ℃, and the plate cracking phenomenon is accompanied in winter production at 3-5 ℃.
Comparative example 2
The specification of the existing commercial (glass magnesium fireproof plate) is 2440 x 1220 x 12mm, and the problems of halogen return, deformation and the like occur.
The specification of the fiber reinforced magnesium sulfate fireproof plate is 2440 mm by 1220 mm, the combustion melting point of magnesia powder is about 2800 ℃, the flexural strength of JC6882006 'glass magnesium plate' reaches 11.8Mpa (more than or equal to 8.0Mpa is qualified), the impact strength reaches 5.3KJ/m2 (more than or equal to 2.0KJ/m2 is qualified), the screw holding force is 27N/m (more than or equal to 15N/m is qualified), and the halogen return resistance reaches no water drop and no moisture regain. The plate has no cracking and deformation phenomenon at 18 degrees below zero.
Compared with the fiber reinforced magnesium sulfate fireproof plate prepared by the invention, the fiber reinforced magnesium sulfate fireproof plate has higher mechanical property and excellent freezing resistance, and the aim of the invention is to provide the building material which meets the requirements of environmental protection, energy conservation and emission reduction of the building material and can improve the fire-fighting fire-resistant limit level. The preparation method of the fiber reinforced magnesium sulfate fireproof plate overcomes the defects of the prior material technology and solves the problems of defects and the like; to promote and optimize the building material. The invention meets the requirements of environmental protection, energy conservation and emission reduction (high toughness strength, light weight, sound insulation, heat insulation and fire resistance) of the building material, and the fiber reinforced magnesium sulfate fireproof plate can improve the fire-fighting fire-resistant limit grade building material. To explosion-proof explosion venting and fire prevention are used as a preferable product for fire-fighting scientific research. The above examples are given for clarity of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims (2)

1. The fiber reinforced magnesium sulfate fireproof plate is characterized by comprising the following raw materials in percentage by weight: 60-78% of light burned magnesia powder, 7-9% of magnesium sulfate heptahydrate solution, 3-10% of citric acid, 4-10% of plant fiber, namely bamboo powder and 6-13% of high-resistant Wen Zhenzhu rock; the rest of water; totaling 100%; a step of
The preparation of the fiber reinforced magnesium sulfate fireproof plate comprises the following specific steps:
a) Taking light burned magnesia powder, a magnesium sulfate heptahydrate solution, citric acid and water accounting for 10% of the raw materials, and putting the materials into a stirrer to stir into slurry serving as a base material; mixing light burned magnesia powder, magnesium sulfate heptahydrate solution and citric acid water accounting for 90% of the rest raw materials, and adding plant fiber, namely bamboo powder, high temperature resistant perlite and water in proportion, and stirring into slurry by a stirrer; as a middle material and a fabric; filtering the base material with a 20-mesh sieve; filtering the fabric by using a sieve with 5mm multiplied by 5mm sieve holes; the middle material is not required to be filtered; the density was controlled at: and (3) backing materials: 1.8-1.82g/cm of the wave, medium: 1.0-1.02g/cm of the fabric: 1.4-1.42g/cm of vigour;
b) Pouring the base material into a template, wherein the thickness of the template is 0.3-0.4mm, and paving a layer of glass fiber mesh cloth; pouring a middle material, and paving two layers of glass fiber mesh cloth; pouring the fabric, and paving a layer of glass fiber mesh cloth, wherein the overall thickness of the glass fiber mesh cloth is 0.5-0.7mm greater than the preset thickness of the product; performing slurry forming to obtain a first plate blank;
c) And (3) primary curing: the first slab is sent into a curing kiln, a curing kiln door is closed, steam and water vapor are introduced into the curing kiln after 3-5 hours, the temperature is raised, the slab reacts spontaneously, and the temperature of the curing kiln is controlled at 25-35 ℃; curing for 20-24 hours, and demolding to obtain a second plate blank;
d) And (3) curing for the second time: the second slab is sent into a curing kiln, the temperature of the curing kiln is controlled at 45-53 ℃ and the curing time is 40-48 hours, and a third slab is prepared;
e) And (3) curing for the third time: the third slab is sent into a curing kiln, the temperature of the curing kiln is controlled between 32 ℃ and 43 ℃ and kept stable; curing for 48-72 hours in a heat-preserving environment, wherein the strength meets the cutting requirement, and a fourth plate blank is prepared;
f) Trimming and sanding: the diagonal error of the manufactured fourth plate blank is less than or equal to 2mm; the length-width error is less than or equal to 2mm; before sanding, measuring the thickness of the plate by using a caliper, and then adjusting the sanding thickness, wherein the sanding amount is not more than 0.3mm each time; after sanding, checking thickness deviation to be +/-0.15 mm by using a caliper; the fiber reinforced magnesium sulfate fireproof plate is prepared.
2. The fiber reinforced magnesium sulfate fire protection plate according to claim 1, wherein the fineness of the light burned magnesia powder is 80 [ mu ] m, the active MgO content is not less than 85%, and the setting time is: the initial setting is not earlier than 45min, and the final setting is not later than 6h; the concentration of the magnesium sulfate heptahydrate solution is more than or equal to 99.5%; the citric acid content of the water citric acid is 99.5%; the plant fiber is bamboo powder, the grain diameter is mesh number is 40-60, the water content is less than or equal to 8% by weight, and the humidity is 17% +/-3%; the glass fiber net, the bottom surface and the surface are made of glass fiber cloth, and no splicing section is allowed; the two middle layers are reinforced with glass fiber mesh cloth, and the allowable deviation of the width is +/-1.0%; the allowable deviation of the warp and weft densities is +/-8.0 percent; the combustible content is not less than 20%; the retention rate of the alkali-resistant tensile breaking strength is not less than 50%; the grain size of the high-temperature-resistant perlite powder is 20-30 meshes.
CN202410264991.8A 2024-03-08 2024-03-08 Fiber reinforced magnesium sulfate fireproof plate and preparation method thereof Pending CN118047589A (en)

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