CN111470842B - Preparation method of environment-friendly inorganic nonmetal fireproof partition plate material - Google Patents

Preparation method of environment-friendly inorganic nonmetal fireproof partition plate material Download PDF

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CN111470842B
CN111470842B CN202010281938.0A CN202010281938A CN111470842B CN 111470842 B CN111470842 B CN 111470842B CN 202010281938 A CN202010281938 A CN 202010281938A CN 111470842 B CN111470842 B CN 111470842B
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talcum powder
fireproof partition
environment
magnesium sulfate
slurry
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CN111470842A (en
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董连勇
李刚
林华好
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Mg Crystal Construction Technology Chongqing Co ltd
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Mg Crystal Construction Technology Chongqing Co ltd
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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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/16—Drying; Softening; Cleaning
    • B32B38/164—Drying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
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    • 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
    • B32B5/02—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 structural features of 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
    • B32B5/02—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 structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/16—Drying; Softening; Cleaning
    • B32B38/164—Drying
    • B32B2038/166—Removing moisture
    • 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
    • B32B2307/30—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
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • 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
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7246—Water vapor barrier
    • 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
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    • C—CHEMISTRY; METALLURGY
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    • 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
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    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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    • 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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  • Inorganic Chemistry (AREA)
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  • Building Environments (AREA)
  • Fireproofing Substances (AREA)

Abstract

A preparation method of an environment-friendly inorganic nonmetal fireproof partition board is characterized by comprising the following steps: the inorganic nonmetal fireproof partition board is formed by adding water into magnesium sulfate to prepare a magnesium sulfate solution, then sequentially adding magnesium oxide and calcium stearate, stirring, then adding bentonite, fly ash, talcum powder, citric acid monohydrate and sodium citrate, stirring to prepare a slurry, then mixing with medium-alkali or low-alkali glass fiber gray fabric and non-woven fabric, maintaining and cutting after roll forming, and then cutting into a series of components to form the fireproof partition board with standard specification. The raw materials used in the invention are safe and environment-friendly, the formaldehyde emission of the prepared environment-friendly inorganic nonmetal fireproof partition board is as low as 0.1ml/L, the environment-friendly inorganic nonmetal fireproof partition board has a fireproof grade A1 grade, the fire resistance limit can reach 4h, the flame temperature can reach 1300 ℃ and can not deform, the size stability of the board is good, the mechanical strength is high, the breaking strength can reach more than 40Mpa, the moisture resistance is good, the corrosion resistance is good, the etching phenomenon is not easy to occur, the connectability is good, and the continuous installation is easy.

Description

Preparation method of environment-friendly inorganic nonmetal fireproof partition plate material
Technical Field
The invention belongs to the field of preparation of fireproof materials for power cables, channels, tunnels and channels, and particularly relates to a preparation method of an environment-friendly inorganic nonmetal fireproof partition plate material.
Background
The fireproof partition board is used for fireproof isolation between high-voltage cable layers laid in the same channel in a power cable tunnel and supporting a continuous rigid structure body of cables and related connecting devices. The high-voltage cable channels such as tunnels and trenches are provided with fireproof partitions according to the design rule requirements, and the fireproof partitions comprise fireproof partition plates. The common fire-proof partition plates at present comprise organic fire-proof type fire-proof partition plates, metal fire-proof partition plates (made of 304 stainless steel materials) and inorganic non-metal fire-proof partition plates. The invention relates to an inorganic nonmetal fireproof partition board.
Common fire-proof partition plates for power grid systems comprise organic fire-proof type fire-proof partition plates, metal fire-proof partition plates and inorganic non-metal fire-proof partition plates. The fire-retardant fire-proof partition board has the fire performance grade only reaching B1 grade or B2 grade and limited fire-proof effect; the metal fireproof partition board is easy to oxidize and rust, and is quick in heat transfer in case of fire and easy to soften and deform in case of fire. Under the background that the inorganic non-metal fireproof partition plate integrates the advantages of the two materials, but the inorganic fireproof partition plate has certain limitation in a humid environment, the manufacturing method of the environment-friendly inorganic non-metal fireproof partition plate is developed to achieve a safer, more reliable fireproof and flame-retardant effect, and meanwhile, the environment-friendly inorganic non-metal fireproof partition plate can be suitable for various environments.
Disclosure of Invention
The invention aims to provide a preparation method of an inorganic nonmetal fireproof partition plate.
The invention is realized according to the following technical scheme:
a preparation method of an inorganic nonmetal fireproof partition board is characterized by comprising the following steps: the inorganic non-metal fireproof partition board is prepared by taking magnesium oxide, magnesium sulfate and water as reaction raw materials, adding the magnesium sulfate into the water to prepare a magnesium sulfate solution, then sequentially adding the magnesium oxide and calcium stearate, stirring, then adding bentonite, fly ash, talcum powder, citric acid monohydrate and sodium citrate, stirring to prepare a slurry, irradiating the slurry by adopting Cs-137 for 6-8 hours, then, distributing medium-alkali or low-alkali glass fiber grey cloth and non-woven fabric on the upper surface and the lower surface, adding sizing agent in the middle, curing for 7-12 hours at the temperature of 30-40 ℃ and the humidity of 80-90% after roll forming, curing for 72 hours at the temperature of 35-45 ℃ and the humidity of 65-70% after demoulding, and then, maintaining for 7 days in a normal temperature environment, cutting, and then cutting into a series of assemblies to form the fireproof partition board with the standard specification.
Further, according to the specific gravity, 12-15 parts of magnesium oxide, 6-6.5 parts of magnesium sulfate and 5.5-6 parts of water in the raw materials are calculated according to the total weight percentage of the slurry, 0.7-1.4% of citric acid monohydrate, 0.4-0.7% of sodium citrate, 5-2.8% of calcium stearate, 7-15% of bentonite, 15-28% of fly ash and 17-30% of talcum powder in the filling material.
Further, the medium-alkali or low-alkali glass fiber grey cloth and the non-woven fabric are distributed on the upper surface and the lower surface in a layered structure, specifically 1 layer of non-woven fabric is respectively arranged on the outermost layers of the upper surface and the lower surface, and then 8-14 layers of alkali or low-alkali glass fiber grey cloth are respectively superposed.
In the preparation process, light weight and large bearing capacity are pursued in the field, but when the light weight is ensured, the bearing capacity is relatively reduced, and when the high bearing capacity is ensured, the weight is relatively increased. The invention uses medium-alkali or low-alkali glass fiber grey cloth and non-woven fabric to increase the insulativity and the heat insulation property of the surface of the inorganic non-metal fireproof partition plate, and the glass fiber grey cloth is used as a first defense line for preventing overheating combustion, thereby ensuring the stability of the material. Through the overlapping use of the multiple layers of medium-alkali or low-alkali glass fiber grey cloth, the strength of the material is enhanced, the bearing capacity of the material is improved, and meanwhile, the light weight is ensured.
Citric acid monohydrate and sodium citrate synergistically prolong the reaction crystallization and condensation time of magnesium oxide and magnesium sulfate, prevent water from being evaporated too fast, improve the stability of a crystalline phase of the fireproof partition plate material, and increase the crystallization density, so that the strength and the acid and alkali corrosion resistance of the inorganic nonmetal fireproof partition plate are improved; the calcium stearate is added to improve the water resistance and the water resistance of the material, improve the softening coefficient of the material and reduce the overall deformation of the material after the material is contacted with external water.
Furthermore, the talcum powder is a mixture of talcum powder A with the particle size D of 5.5-6 μm and talcum powder B with the particle size of 9-10 μm, wherein the talcum powder A and the talcum powder B have different thicknesses and comprise the following components in percentage by mass: and talcum powder B is 2: 1-1.5.
The talcum powder is a mixture of talcum powder A with the particle size D being 6 mu m and talcum powder B with the particle size being 9 mu m, wherein the talcum powder A and the talcum powder B have different thicknesses and comprise the following components in percentage by mass: and talcum powder B is 2:1.
The talcum powder is added into the system as a filler, plays a role of a framework and can improve the flame retardance of the material. However, the talcum powder has a special rhombic lamellar structure, which directly affects the density of the material, and larger gaps are formed among particles due to the accumulation of the talcum powder, so that the density of the material is reduced, and the corrosion resistance and the deformation resistance of the material are affected. The invention adopts the talcum powder with different thickness degrees as the filling material to realize secondary filling, thereby increasing the material density, reducing the shrinkage rate of the prepared material, simultaneously reducing the hydration heat, preventing high-temperature deformation and ensuring the dimensional stability.
When a plurality of fillers are added into the slurry, the heat inside the prepared material cannot be released, the temperature and the pressure are gradually increased, when the heat reaches a certain degree, the material expands and is easy to crack or even burst, and in addition, the bentonite is easy to absorb water to expand, so that the filling effect and the material strength are influenced; according to the invention, bentonite, talcum powder and fly ash are used as fillers, wherein the bentonite can enhance the fire-proof limit of the material and simultaneously increase the plasticity and cohesiveness of the slurry, the talcum powder promotes the self-hydration reaction of the fly ash to generate calcium silicate, the waterproofness of the material is increased, the talcum powder, the calcium silicate, the citric acid monohydrate and the sodium citrate are used for synergistically reducing hydration heat, so that the temperature stress is reduced, the material is inhibited from generating cracks, the reaction auxiliary agents, namely the citric acid monohydrate and the sodium citrate are used for synergistically prolonging the setting time of a crystalline phase and increasing the stability of the material, and the fly ash is uniformly dispersed in the slurry and combined with the crystalline phase, so that capillary pores in the slurry are refined, the strength of the material is enhanced, the impermeability and durability of the material are improved, and the water absorption expansibility of the bentonite is inhibited. And the Cs-137 irradiation treatment is combined, so that the molecular structure of the slurry is changed, the toughness and tensile strength of the material are enhanced, and the surface cracking and pulverization of the material are inhibited.
The preparation method of the environment-friendly inorganic nonmetal fireproof partition board is characterized by comprising the following steps of:
step (1): mixing 6-6.5 parts of magnesium sulfate and 5.5-6 parts of water according to the proportion, stirring to prepare a magnesium sulfate solution, feeding the magnesium sulfate solution into a stirrer, sequentially adding 12-15 parts of magnesium oxide and calcium stearate into a proportioning bin, conveying the mixture into the stirrer, stirring for 15-20min together with the magnesium sulfate solution, sequentially adding bentonite, fly ash, talcum powder, citric acid monohydrate and sodium citrate, continuously stirring for 10-15min to form slurry, wherein the citric acid monohydrate is 0.7-1.4 percent, the sodium citrate is 0.4-0.7 percent, the calcium stearate is 5-2.8 percent, the bentonite is 7-15 percent, the fly ash is 15-28 percent and the talcum powder is 17-30 percent in the filling material, and the talcum powder is a mixture consisting of talcum powder A with the particle size D of 6 mu m and talcum powder B with the particle size of 9 mu m and different thicknesses, the talcum powder comprises the following components in percentage by mass: talcum powder B is 2: 1;
step (2): performing irradiation treatment on the slurry for 6-8 hours by adopting Cs-137;
and (3): sending the stirred slurry into a spreading machine, distributing medium-alkali or low-alkali glass fiber grey cloth and non-woven fabric on the upper surface and the lower surface, adding the slurry into the middle, rolling and forming, then sending into a drying room, curing for 7-12 hours under the conditions of 30-40 ℃ and 80-90% of humidity, then sending into a demolding system for demolding, curing for 72 hours under the conditions of 35-45 ℃ and 65-70% of humidity, then curing for 7 days at normal temperature, and then sending into a cutting production line;
and (4): and further cutting the cut plate body into a series of components according to the specification of the fireproof partition plate (cutting according to the design specification of a channel), and further combining and assembling at an installation site to form the fireproof partition plate with the standard specification, so that the fireproof partition plate meets the national standard requirement.
In the manufacturing process, the talcum powder is easy to suspend on the surface of the slurry, the bentonite is agglomerated in the slurry, the dispersibility is poor, the surface structure is poor, and the plate is easy to warp, deform, have size deviation and the like. According to the invention, the citric acid monohydrate and the sodium citrate are added after the filler is added, so that the talcum powder and the bentonite are uniformly dispersed in the slurry, and the function of the talcum powder and the bentonite is effectively exerted, so that the environment-friendly fire-resistant cable trough box component material is good in glossiness and uniformity, has good fire resistance and moisture resistance, and simultaneously has good mechanical properties.
According to the invention, the adjustment can be made according to actual needs, so that the thickness, the compressive strength, the flexural strength and the like of the plate can be adjusted to meet the standard use requirements.
The invention has the following beneficial effects:
the raw materials used in the invention are safe and environment-friendly, no emissive substance is generated, the formaldehyde emission of the prepared environment-friendly inorganic nonmetal fireproof partition board is as low as 0.1ml/L, the formaldehyde emission reaches E0 grade and is greatly lower than European Union standard, the environment-friendly inorganic nonmetal fireproof partition board has a fireproof grade A1 grade, the fire resistance limit can reach 4h, the flame temperature can not deform when reaching 1300 ℃, the dry shrinkage rate is 0.1%, the wet expansion rate is 0.1%, the size stability of the board is good, the mechanical strength is high, the folding strength can reach more than 40Mpa, the moisture resistance is good, the corrosion phenomenon is not easy to occur, the connectivity is good, and the continuous installation is easy.
Detailed Description
The present invention is further described in detail by the following examples, it should be noted that the following detailed description is only for illustrative purposes and is not to be construed as limiting the scope of the present invention, and that the non-essential modifications and variations of the present invention can be made by those skilled in the art according to the above disclosure.
Example 1
A preparation method of an environment-friendly inorganic nonmetal fireproof partition plate is realized according to the following steps:
step (1): taking 6.2 parts of magnesium sulfate and 5.8 parts of water according to the specific weight, mixing and stirring to prepare a magnesium sulfate solution, feeding the magnesium sulfate solution into a stirrer, sequentially putting 14 parts of magnesium oxide and calcium stearate into a proportioning bin, conveying the proportioning bin into the stirrer, stirring for 18min together with the magnesium sulfate solution, sequentially adding bentonite, fly ash, talcum powder, citric acid monohydrate and sodium citrate, and continuously stirring for 12min to form slurry, wherein the citric acid monohydrate is 1 percent, the sodium citrate is 0.4-0.7 percent, the calcium stearate is 5-2.8 percent, the bentonite is 10 percent, the fly ash is 20 percent and the talcum powder is 25 percent, the talcum powder is a mixture consisting of talcum powder A with the particle size D of 6 mu m and talcum powder B with the particle size of 9 mu m, and the talcum powder is a mixture with two different thicknesses, and the mass ratio is that the talcum powder A: talcum powder B is 2: 1;
step (2): performing irradiation treatment on the slurry for 7 hours by adopting Cs-137;
and (3): sending the stirred slurry into a spreading machine, distributing medium-alkali or low-alkali glass fiber grey cloth and non-woven fabrics on the upper surface and the lower surface, adding the slurry into the middle, rolling and forming, then sending into a drying room, curing for 9 hours at 35 ℃ and 85% humidity, then sending into a demolding system for demolding, curing for 72 hours at 40 ℃ and 68% humidity, then curing for 7 days at normal temperature, and then sending into a cutting production line;
and (4): and further cutting the cut plate body into a series of components according to the specification of the fireproof partition plate (cutting according to the design specification of a channel), and further combining and assembling at an installation site to form the fireproof partition plate with the standard specification, so that the fireproof partition plate meets the national standard requirement.
The formaldehyde emission amount of the environment-friendly fireproof partition plate material prepared by the embodiment is 0.1mg/L which is lower than the European standard by 0.5mg/L, the fireproof grade reaches A1 grade, the fire resistance limit can reach 4h, the flame temperature can reach 1300 ℃ without deformation, the dry shrinkage rate is 0.1%, the wet expansion rate is 0.1%, the mechanical strength is high, and the breaking strength can reach more than 40 Mpa.
Example 2
The preparation method of the environment-friendly inorganic nonmetal fireproof partition board is characterized by comprising the following steps of:
step (1): taking 6 parts of magnesium sulfate and 6 parts of water according to the specific weight, mixing and stirring to prepare a magnesium sulfate solution, feeding the magnesium sulfate solution into a stirrer, sequentially adding 12 parts of magnesium oxide and calcium stearate into a proportioning bin, conveying the mixture into the stirrer, stirring the mixture together with the magnesium sulfate solution for 20min, sequentially adding bentonite, fly ash, talcum powder, citric acid monohydrate and sodium citrate, and continuously stirring for 10min to form slurry, wherein the citric acid monohydrate is 1.4 percent, the sodium citrate is 0.7 percent, the calcium stearate is 5 percent, the bentonite is 7 percent, the fly ash is 28 percent and the talcum powder is 30 percent in the filling material, the talcum powder is a mixture consisting of talcum powder A with the particle size D being 5.5 mu m and talcum powder B with the particle size being 10 mu m and different in thickness, and the composition mass ratio is that the talcum powder A: talcum powder B is 2: 1.5;
step (2): performing irradiation treatment on the slurry for 6 hours by adopting Cs-137;
and (3): sending the stirred slurry into a spreading machine, distributing medium-alkali or low-alkali glass fiber grey cloth and non-woven fabrics on the upper surface and the lower surface, adding the slurry into the middle, rolling and forming, then sending into a drying room, curing for 12 hours at 30 ℃ and 90% humidity, then sending into a demolding system for demolding, curing for 72 hours at 35 ℃ and 65% humidity, then curing for 7 days at normal temperature, and then sending into a cutting production line;
and (4): and further cutting the cut plate body into a series of components according to the specification of the fireproof partition plate (cutting according to the design specification of a channel), and further combining and assembling at an installation site to form the fireproof partition plate with the standard specification, so that the fireproof partition plate meets the national standard requirement.
Example 3
The preparation method of the environment-friendly inorganic nonmetal fireproof partition board is characterized by comprising the following steps of:
step (1): taking 6 parts of magnesium sulfate and 5.5 parts of water according to the specific weight, mixing and stirring to prepare a magnesium sulfate solution, feeding the magnesium sulfate solution into a stirrer, sequentially putting 15 parts of magnesium oxide and calcium stearate into a proportioning bin, conveying the proportioning bin into the stirrer, stirring for 15min together with the magnesium sulfate solution, sequentially adding bentonite, fly ash, talcum powder, citric acid monohydrate and sodium citrate, continuously stirring for 15min to form slurry, wherein the citric acid monohydrate is 0.7 percent, the sodium citrate is 0.4 percent, the calcium stearate is 2.8 percent, the bentonite in the filling material is 15 percent, the fly ash is 15 percent and the talcum powder is 17 percent, the talcum powder is a mixture consisting of talcum powder A with the grain diameter D being mu m and talcum powder B with the grain diameter being 9.5 mu m and different in thickness, and the composition mass ratio is that the talcum powder A: talcum powder B is 2: 1.2;
step (2): performing irradiation treatment on the slurry for 8 hours by adopting Cs-137;
and (3): sending the stirred slurry into a spreading machine, distributing medium-alkali or low-alkali glass fiber grey cloth and non-woven fabrics on the upper surface and the lower surface, adding the slurry into the middle, rolling and forming, then sending into a drying room, curing for 7 hours at 40 ℃ and 80% humidity, then sending into a demolding system for demolding, curing for 72 hours at 45 ℃ and 70% humidity, then curing for 7 days at normal temperature, and then sending into a cutting production line;
and (4): and further cutting the cut plate body into a series of components according to the specification of the fireproof partition plate (cutting according to the design specification of a channel), and further combining and assembling at an installation site to form the fireproof partition plate with the standard specification, so that the fireproof partition plate meets the national standard requirement.
The environmental-friendly inorganic non-metal fireproof partition plate material sample prepared by the invention is subjected to various index detection, and the detection results are shown in tables 1 and 2.
Table 1:
Figure BDA0002446916020000091
table 2:
Figure BDA0002446916020000092
according to the detection result, the prepared environment-friendly inorganic nonmetal fireproof partition board has the advantages of qualified indexes, low dry shrinkage rate and wet expansion rate and good waterproof performance. High breaking strength, impact strength, holding screw strength and size stability. Low formaldehyde release, no toxicity and high environmental protection performance of the product. The quality loss rate is low after animal setting.

Claims (4)

1. A preparation method of an environment-friendly inorganic nonmetal fireproof partition board is characterized by comprising the following steps: the inorganic non-metal fireproof partition board is prepared by taking magnesium oxide, magnesium sulfate and water as reaction raw materials, adding magnesium sulfate into the water to prepare a magnesium sulfate solution, sequentially adding magnesium oxide and calcium stearate, stirring, adding bentonite, fly ash, talcum powder, citric acid monohydrate and sodium citrate, stirring to prepare a slurry, irradiating the slurry for 6-8 hours by adopting Cs-137, then distributing medium-alkali or low-alkali glass fiber grey cloth and non-woven fabric on the upper surface and the lower surface, adding the slurry in the middle, curing for 7-12 hours under the conditions of 30-40 ℃ and 80-90% humidity after roll forming, curing for 72 hours under the conditions of 35-45 ℃ and 65-70% humidity after demolding, curing for 7 days in a normal temperature environment, cutting into a series of components, and forming the fireproof partition board with standard specification, the talcum powder is a mixture of talcum powder A with the particle size D =5.5-6 μm and talcum powder B with the particle size of 9-10 μm, wherein the talcum powder A and the talcum powder B have different thicknesses and comprise the following components in percentage by mass: talc B =2: 1-1.5.
2. The method for preparing an environment-friendly inorganic non-metallic fire barrier as claimed in claim 1, wherein: the raw materials comprise, by weight, 12-15 parts of magnesium oxide, 6-6.5 parts of magnesium sulfate and 5.5-6 parts of water, wherein the raw materials comprise, by weight, 0.7-1.4% of citric acid monohydrate, 0.4-0.7% of sodium citrate, 5-2.8% of calcium stearate, and the filling material comprises, by weight, 7-15% of bentonite, 15-28% of fly ash and 17-30% of talcum powder.
3. The method for preparing an environment-friendly inorganic non-metallic fire barrier as claimed in claim 1 or 2, wherein: the medium-alkali or low-alkali glass fiber grey cloth and the non-woven fabric are distributed on the upper surface and the lower surface in a layered structure, specifically 1 layer of non-woven fabric is respectively arranged on the outermost layers of the upper surface and the lower surface, and then 8-14 layers of alkali or low-alkali glass fiber grey cloth are respectively superposed.
4. The preparation method of the environment-friendly inorganic nonmetal fireproof partition board is characterized by comprising the following steps of:
step (1): taking 6-6.5 parts of magnesium sulfate and 5.5-6 parts of water according to the specific weight, mixing and stirring to prepare a magnesium sulfate solution, feeding the magnesium sulfate solution into a stirring machine, sequentially adding 12-15 parts of magnesium oxide and calcium stearate into a proportioning bin, conveying the mixture into the stirring machine, stirring for 15-20min together with the magnesium sulfate solution, sequentially adding bentonite, fly ash, talcum powder, citric acid monohydrate and sodium citrate, and continuously stirring for 10-15min to form a slurry, wherein the citric acid monohydrate accounts for 0.7-1.4 percent, the sodium citrate accounts for 0.4-0.7 percent, the calcium stearate accounts for 5-2.8 percent, and the bentonite accounts for 7-15 percent, the fly ash accounts for 15-28 percent and the talcum powder accounts for 17-30 percent in the filling material;
step (2): performing irradiation treatment on the slurry for 6-8 hours by adopting Cs-137;
and (3): sending the stirred slurry into a spreading machine, distributing medium-alkali or low-alkali glass fiber grey cloth and non-woven fabric on the upper surface and the lower surface, adding the slurry into the middle, rolling and forming, then sending into a drying room, curing for 7-12 hours under the conditions of 30-40 ℃ and 80-90% of humidity, then sending into a demolding system for demolding, curing for 72 hours under the conditions of 35-45 ℃ and 65-70% of humidity, then curing for 7 days at normal temperature, and then sending into a cutting production line;
and (4): and the cut plate body is further cut into a series of components according to the specification of the fireproof partition plate, and the components are further combined and assembled on an installation site to form the fireproof partition plate with the standard specification, so that the fireproof partition plate meets the national standard requirement.
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