CN116375497A - Rock magnesium floating bead plate and preparation method thereof - Google Patents
Rock magnesium floating bead plate and preparation method thereof Download PDFInfo
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- CN116375497A CN116375497A CN202310247778.1A CN202310247778A CN116375497A CN 116375497 A CN116375497 A CN 116375497A CN 202310247778 A CN202310247778 A CN 202310247778A CN 116375497 A CN116375497 A CN 116375497A
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- 238000007667 floating Methods 0.000 title claims abstract description 187
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 117
- 239000011777 magnesium Substances 0.000 title claims abstract description 117
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 239000011435 rock Substances 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title abstract description 7
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims abstract description 228
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims abstract description 114
- 235000019341 magnesium sulphate Nutrition 0.000 claims abstract description 114
- 238000002156 mixing Methods 0.000 claims abstract description 63
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 57
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 57
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000010451 perlite Substances 0.000 claims abstract description 56
- 235000019362 perlite Nutrition 0.000 claims abstract description 56
- 239000002245 particle Substances 0.000 claims abstract description 46
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000010439 graphite Substances 0.000 claims abstract description 42
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 42
- 239000002994 raw material Substances 0.000 claims abstract description 25
- 239000003607 modifier Substances 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims description 55
- 239000002002 slurry Substances 0.000 claims description 39
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 28
- 239000004744 fabric Substances 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 229910052697 platinum Inorganic materials 0.000 claims description 14
- 239000003365 glass fiber Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 8
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- 239000003623 enhancer Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 13
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- 230000000903 blocking effect Effects 0.000 abstract description 2
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- 229910052751 metal Inorganic materials 0.000 description 6
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- 229920006327 polystyrene foam Polymers 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 239000011162 core material Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
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- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- GARPJQVATFLXFO-UHFFFAOYSA-L S(=O)(=O)([O-])[O-].[Mg+2].[O-2].[Mg+2] Chemical compound S(=O)(=O)([O-])[O-].[Mg+2].[O-2].[Mg+2] GARPJQVATFLXFO-UHFFFAOYSA-L 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
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Images
Classifications
-
- 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
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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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)
Abstract
The invention relates to the field of fireproof materials, in particular to a rock magnesium floating bead plate and a preparation method thereof. The main body structure of the rock-magnesium floating bead plate is prepared from the following raw materials in parts by weight: 220-280 parts of magnesium oxide, 380-410 parts of magnesium sulfate solution, 45-60 parts of floating beads, 10-15 parts of expanded perlite, 10-15 parts of graphite particles and 1-1.5 parts of modifier. The fireproof material is glued into a plate through mixing and gelling of various components, magnesium oxide and magnesium sulfate are fully exerted to be matched and gelled to form a main body with good structural strength, floating beads and expanded perlite are utilized to form a large number of tiny void structures, graphite particles are matched to form an interlayer for blocking heat, and the comprehensive performance of structural strength and low heat conductivity is achieved.
Description
Technical Field
The invention relates to a fireproof heat-insulating material, in particular to a rock magnesium floating bead plate and a preparation method thereof, belonging to a fireproof heat-insulating core material formula and a plate.
Background
With the rapid development of global economy, various industries emerge with a large number of high and new technology industries, such as electronic semiconductors, aerospace, biological medicines, new energy sources and the like. The production line of related industry is higher and higher in precision degree, and correspondingly, the requirements on the cleanliness of a factory building are higher and higher, and the production line with extremely high cleanliness requirements is designed into a fully-closed environment, so that the traditional fire safety design can not meet the original design requirements. Therefore, a completely new fire performance optimization process is required for walls, ceilings, etc. of a clean room.
The fireproof materials adopted by the existing factory building design mainly comprise: glass magnesium rock wool sandwich board and rock wool sandwich board. Compared with polystyrene foam boards commonly used in traditional factory building designs, the two fireproof boards are mainly characterized in that inflammable foam particles adopted by interlayers in the foam boards are replaced by rock wool materials.
The polystyrene foam board has the characteristics of light weight and sound insulation, and after being replaced by the rock wool sandwich board, the polystyrene foam board has high energy consumption in the production and processing of the rock wool, and severely limits the effects of energy conservation and emission reduction. In addition, when the glass magnesium rock wool sandwich board and the rock wool board are subjected to high temperature, toxic smoke is generated, and the glass magnesium rock wool sandwich board and the rock wool board have certain fireproof safety performance.
In addition, the rock wool material of the common fireproof heat-insulating material is soft, can not be used for a suspended ceiling structure, and needs to be matched with an independent framework structure, so that the structural bearing performance and the installation of the sandwich plate are limited to a certain extent. For the scene that higher humidity exists in factory building environment, rock wool can form certain restriction because of its hydroscopicity, and after rock wool absorbed in a large number, its fire prevention heat preservation performance all can decay fast, causes the structural failure even.
Disclosure of Invention
The invention aims at: aiming at the defects of low strength, high production energy consumption and toxic smoke generated at high temperature of a rock wool plate structure in the prior art, the rock magnesium floating bead plate and the preparation method thereof are provided.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the main body structure of the rock-magnesium floating bead plate is prepared from the following raw materials in parts by weight: 220-280 parts of magnesium oxide, 380-410 parts of magnesium sulfate solution, 45-60 parts of floating beads, 10-15 parts of expanded perlite, 10-15 parts of graphite particles and 1-1.5 parts of modifier.
According to the invention, the raw materials for preparing the rock-magnesium floating bead plate are magnesium oxide, magnesium sulfate, floating beads and perlite, the magnesium oxide, the magnesium sulfate, the floating beads and the perlite are mixed, gelled and bonded to form a plate, the magnesium oxide and the magnesium sulfate are fully exerted to be matched and gelled to form a main body with good structural strength, a large number of tiny void structures are formed by using the floating beads and the expanded perlite, and a middle layer for blocking heat is formed by matching with graphite particles, so that the comprehensive performance of structural strength and low heat conductivity is achieved.
Further, the rock magnesium floating bead plate is prepared from the following raw materials in parts by weight: 255-265 parts of magnesium oxide, 385-405 parts of magnesium sulfate solution, 50-55 parts of floating beads, 11-14 parts of expanded perlite, 11-14 parts of graphite particles and 1-1.2 parts of modifier.
Further, the magnesium sulfate solution is prepared by adding water into magnesium sulfate powder, stirring and mixing uniformly to prepare slurry with the concentration of 40-60% by weight.
Further, the mixing ratio of the magnesium oxide to the magnesium sulfate is 12-14:20. The weight proportion of magnesium sulfate is calculated according to the weight proportion of solid components, and the weight proportion of magnesium sulfate solute in the magnesium sulfate solution is calculated according to the weight proportion of magnesium sulfate and magnesium oxide when the rock magnesium floating bead plate body is prepared.
Further, the weight ratio of the floating beads to the expanded perlite is 50-55:13. The floating beads and the expanded perlite have different particle sizes and have a large number of void structures, and discontinuous micro cavities which are uniformly distributed can be better formed by controlling the proportion of the floating beads and the expanded perlite, so that the heat insulation performance of the material is enhanced. And the cavity structure is uniformly dispersed, and the influence on the strength of the whole structure is minimal.
Further, the thickness of the rock magnesium floating bead plate main body is 40-150 mm, preferably 50-125 mm. The fireproof performance can reach 1-4 hours, and various fire safety standard requirements are met.
Further, the floating beads are 8-60 mesh floating beads. For example, it may be a floating bead having a particle size of less than 0.5 mm. The floating beads are hollow spheres separated from the fly ash, have light weight, can float on the water surface and are grey-white. Preferably, the floating bead volume weight is 440-700kg/m 3 。
Preferably, the surface of the floating bead is closed and smooth, can resist high temperature of 1800 ℃, has extremely low heat conductivity, and can greatly improve the heat preservation and fire resistance of the rock magnesium floating bead plate.
Preferably, the floating beads are 8-40 mesh floating beads, the hollow particle size is larger, and the fireproof and heat-insulating properties are better.
Further, the modifier is a structural enhancer.
Preferably, the structural reinforcement is a cement. Such as any one or more of cement, fly ash, and calcium carbonate.
Further, the surface of the rock magnesium floating bead plate main body is covered with glass fiber cloth or platinum cloth. The glass fiber cloth or platinum cloth veneers are covered on the surface of the rock-magnesium floating bead plate main body, so that the sealing performance of the main body can be improved, the overall fire resistance is enhanced, and the dust falling of the main body structure is reduced.
Further, the exterior of the rock-magnesium floating bead plate is wrapped with a metal panel, and the compressive strength of the rock-magnesium floating bead plate is more than 800 kg/m 2 。
Preferably, the thickness of the metal panel is 0.5-1mm.
Preferably, the metal panel is a galvanized sheet, a painted panel, a stainless steel sheet.
Further, the rock magnesium floating bead plate is provided with an arc-shaped groove structure, and non-woven fabrics and/or glass fiber cloth are attached to the surface of the arc-shaped groove structure. One surface of the rock magnesium floating bead plate can be provided with a groove to form a cavity in the middle core part, so that the effects of reducing weight and improving fireproof heat preservation performance are achieved.
The preparation method of the rock-magnesium floating bead plate comprises the following steps:
s1, adding water into the magnesium sulfate powder, stirring and mixing uniformly to prepare slurry with the concentration of 40-60% by weight for later use.
S2, mixing the magnesium oxide, the floating beads, the expanded perlite, the graphite particles and the modifier, and uniformly stirring; then, adding the magnesium sulfate solution, and continuously stirring and uniformly mixing to obtain mixed slurry.
S3, introducing the mixed slurry into a mold, covering the surface with glass fiber cloth or platinum cloth, pressurizing for 1-5MPa, and maintaining the pressure for 5-10min for molding.
S4, taking out the pressed plate from the die, and naturally air-drying for 1-7 days to obtain the rock-magnesium floating bead plate.
The preparation method of the rock-magnesium floating bead plate has the advantages of simple process, easy implementation, extremely low carbon emission in the production process, high structural strength of the formed plate, good weather resistance and meeting the requirements of various specifications.
Further, the surface of the rock-magnesium floating bead plate is also wrapped with a metal panel, and the rock-magnesium floating bead plate is wrapped and sealed by the metal panel, so that a finished product of the rock-magnesium floating bead plate with the sealed panel is obtained.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
1. the rock magnesium floating bead plate is scientifically selected, and the mixed slurry is adhered to form the plate, so that the plate has good fireproof heat preservation performance, and the material has good structural strength, and can provide sufficient support for the whole fireproof heat preservation plate. And an additional special structural strength reinforcing piece is not needed, so that the production cost and carbon emission of the fireproof insulation board are greatly reduced.
2. After the rock magnesium floating bead plate is molded, a large number of micro-void structures are arranged in the rock magnesium floating bead plate, the heat insulation performance is outstanding, the matching proportion of various materials is proper, the micro-voids which are discontinuously and uniformly distributed are realized, and the rock magnesium floating bead plate has extremely low heat conductivity and ensures better structural strength.
3. The rock magnesium floating bead plate is covered with a layer of metal panel, so that good overall structural strength can be obtained, an auxiliary bearing or supporting structure is not required to be built after the rock magnesium floating bead plate is used as a wallboard, and the rock magnesium floating bead plate can be used as a main body structure of a non-bearing wall.
Description of the drawings:
FIG. 1 is a photograph of a fire performance test.
Detailed Description
The present invention will be described in detail below.
The present invention will be further described in detail with reference to the following examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
Rock magnesium floating bead plate
Preparing a magnesium sulfate solution: powder magnesium sulfate is purchased externally, water is added according to the proportion of 1:1, and the mixture is stirred and mixed uniformly to prepare 50wt% magnesium sulfate solution (slurry) for standby.
Preparing a rock-magnesium floating bead plate, firstly weighing the following raw materials in parts by weight: 260 kg of magnesium oxide, 398 kg of magnesium sulfate solution, 52 kg of floating beads (about 0.4 cubic meter, granular material floating beads with good fireproof performance), 13 kg of expanded perlite (about 0.15 cubic meter), 13 kg of graphite particles (about 0.55 cubic meter) and 1.1 kg of silicate cement. Wherein, the magnesium oxide is powder, which is the main fireproof component of the plate. The magnesium sulfate solution is prepared as slurry with the concentration of 50% and is used for bonding main fireproof components and playing a key role in fireproof and heat insulation.
Mixing magnesium oxide, floating beads, expanded perlite, graphite particles and silicate cement, and stirring uniformly. Then, the magnesium sulfate solution was added, and stirring and mixing were continued to obtain a viscous slurry. Pouring the thick slurry into a mould, covering the surface with platinum cloth, maintaining the pressure at 1MPa for 6min for molding, compacting to form a 50mm plate, airing in a shade place for 3 days, and airing to obtain the rock-magnesium floating bead plate.
The 50mm rock-magnesium floating bead plate is packaged by a galvanized plate with the thickness of 0.8mm to prepare a 100mm fireproof plate, and the plate with the length multiplied by the width multiplied by 2 multiplied by 1.2 meters is prepared. The strength test is carried out by adopting a fireproof plate pressure tester, and the result shows that the compressive strength of the plate is more than 800 kg/m 2 。
Further carries out fire resistance detection and meets the national safety standard requirement. The performance test result shows that the rock-magnesium floating bead plate is formed by mixing, gelling and bonding magnesium oxide, magnesium sulfate, floating beads and perlite, and fully exerts the advantages of good structural strength of the bonding of magnesium oxide and magnesium sulfate solution, high structural strength, low heat conductivity coefficient and outstanding comprehensive performance, and the floating beads and the expanded perlite form a large number of foaming structures with micro continuous gradation.
Example 2
Rock magnesium floating bead plate
Preparing a magnesium sulfate solution: and (3) outsourcing powdery magnesium sulfate, adding water according to the proportion of 1:1, stirring and uniformly mixing to prepare 50wt% of magnesium sulfate solution for later use.
Preparing a rock-magnesium floating bead plate, firstly weighing the following raw materials in parts by weight: 265 kg of magnesium oxide, 400 kg of magnesium sulfate solution, 53 kg of floating beads, 12 kg of expanded perlite, 13 kg of graphite particles and 1.1 kg of Portland cement.
Mixing magnesium oxide, floating beads, expanded perlite, graphite particles and silicate cement, and stirring uniformly. Then, the magnesium sulfate solution was added, and stirring and mixing were continued to obtain a viscous slurry. Brushing a layer of release agent in a mold, paving a layer of platinum cloth, pouring thick slurry, maintaining the pressure at 1MPa for 10min, compacting to obtain a 50mm plate, and airing in a shade to obtain the rock-magnesium floating bead plate.
Two magnesium rock floating bead plates with the thickness of 50mm are stacked, and then the surfaces of the magnesium rock floating bead plates are packaged by galvanized plates with the thickness of 0.8mm, so that the 100mm fireproof plate is manufactured. The national MAC detection unit is tested to be qualified, and reports show that the fire resistance of the fireproof plate exceeds 4 hours, and the fireproof plate belongs to a high-quality fireproof partition wall.
Example 3
Rock magnesium floating bead plate
Preparing a magnesium sulfate solution: and (3) outsourcing powdery magnesium sulfate, adding water according to the proportion of 1:1, stirring and uniformly mixing to prepare 50wt% of magnesium sulfate solution for later use.
Preparing a rock-magnesium floating bead plate, firstly weighing the following raw materials in parts by weight: 230 kg of magnesium oxide, 460 kg of magnesium sulfate solution, 53 kg of floating beads, 12 kg of expanded perlite, 13 kg of graphite particles and 1.1 kg of Portland cement.
Mixing magnesium oxide, floating beads, expanded perlite, graphite particles and silicate cement, and stirring uniformly. Then, the magnesium sulfate solution was added, and stirring and mixing were continued to obtain a viscous slurry. Brushing a layer of release agent in a mold, paving a layer of platinum cloth, pouring thick slurry, maintaining the pressure at 2MPa for 5min, compacting to obtain a 50mm plate, and airing in a shade to obtain the rock-magnesium floating bead plate.
Example 4
Rock magnesium floating bead plate
Preparing a magnesium sulfate solution: and (3) outsourcing powdery magnesium sulfate, adding water according to the proportion of 1:1, stirring and uniformly mixing to prepare 50wt% of magnesium sulfate solution for later use.
Preparing a rock-magnesium floating bead plate, firstly weighing the following raw materials in parts by weight: 241 kg of magnesium oxide, 438 kg of magnesium sulfate solution, 53 kg of floating beads, 12 kg of expanded perlite, 13 kg of graphite particles and 1.1 kg of Portland cement.
Mixing magnesium oxide, floating beads, expanded perlite, graphite particles and silicate cement, and stirring uniformly. Then, the magnesium sulfate solution was added, and stirring and mixing were continued to obtain a viscous slurry. Brushing a layer of release agent in a mold, paving a layer of platinum cloth, pouring thick slurry, maintaining the pressure at 1MPa for 5min, compacting to obtain a 50mm plate, and airing in a shade to obtain the rock-magnesium floating bead plate.
Example 5
Rock magnesium floating bead plate
Preparing a magnesium sulfate solution: and (3) outsourcing powdery magnesium sulfate, adding water according to the proportion of 1:1, stirring and uniformly mixing to prepare 50wt% of magnesium sulfate solution for later use.
Preparing a rock-magnesium floating bead plate, firstly weighing the following raw materials in parts by weight: 250.9 kg of magnesium oxide, 418.2 kg of magnesium sulfate solution, 53 kg of floating beads, 12 kg of expanded perlite, 13 kg of graphite particles and 1.1 kg of Portland cement.
Mixing magnesium oxide, floating beads, expanded perlite, graphite particles and silicate cement, and stirring uniformly. Then, the magnesium sulfate solution was added, and stirring and mixing were continued to obtain a viscous slurry. Brushing a layer of release agent in a mold, paving a layer of platinum cloth, pouring thick slurry, maintaining the pressure at 1MPa for 5min, compacting to obtain a 50mm plate, and airing in a shade to obtain the rock-magnesium floating bead plate.
Example 6
Rock magnesium floating bead plate
Preparing a magnesium sulfate solution: and (3) outsourcing powdery magnesium sulfate, adding water according to the proportion of 1:1, stirring and uniformly mixing to prepare 50wt% of magnesium sulfate solution for later use.
Preparing a rock-magnesium floating bead plate, firstly weighing the following raw materials in parts by weight: 260 kg of magnesium oxide, 400 kg of magnesium sulfate solution, 53 kg of floating beads, 12 kg of expanded perlite, 13 kg of graphite particles and 1.1 kg of Portland cement.
Mixing magnesium oxide, floating beads, expanded perlite, graphite particles and silicate cement, and stirring uniformly. Then, the magnesium sulfate solution was added, and stirring and mixing were continued to obtain a viscous slurry. Brushing a layer of release agent in a mold, paving a layer of platinum cloth, pouring thick slurry, maintaining the pressure at 1MPa for 5min, compacting to obtain a 50mm plate, and airing in a shade to obtain the rock-magnesium floating bead plate.
Example 7
Rock magnesium floating bead plate
Preparing a magnesium sulfate solution: and (3) outsourcing powdery magnesium sulfate, adding water according to the proportion of 1:1, stirring and uniformly mixing to prepare 50wt% of magnesium sulfate solution for later use.
Preparing a rock-magnesium floating bead plate, firstly weighing the following raw materials in parts by weight: 268.3 kg of magnesium oxide, 383.4 kg of magnesium sulfate solution, 53 kg of floating beads, 12 kg of expanded perlite, 13 kg of graphite particles and 1.1 kg of Portland cement.
Mixing magnesium oxide, floating beads, expanded perlite, graphite particles and silicate cement, and stirring uniformly. Then, the magnesium sulfate solution was added, and stirring and mixing were continued to obtain a viscous slurry. Brushing a layer of release agent in a mold, paving a layer of platinum cloth, pouring thick slurry, maintaining the pressure at 1MPa for 5min, compacting to obtain a 50mm plate, and airing in a shade to obtain the rock-magnesium floating bead plate.
Example 8
Rock magnesium floating bead plate
Preparing a magnesium sulfate solution: and (3) outsourcing powdery magnesium sulfate, adding water according to the proportion of 1:1, stirring and uniformly mixing to prepare 50wt% of magnesium sulfate solution for later use.
Preparing a rock-magnesium floating bead plate, firstly weighing the following raw materials in parts by weight: 276 kg of magnesium oxide, 368 kg of magnesium sulfate solution, 53 kg of floating beads, 12 kg of expanded perlite, 13 kg of graphite particles and 1.1 kg of Portland cement.
Mixing magnesium oxide, floating beads, expanded perlite, graphite particles and silicate cement, and stirring uniformly. Then, the magnesium sulfate solution was added, and stirring and mixing were continued to obtain a viscous slurry. Brushing a layer of release agent in a mold, paving a layer of platinum cloth, pouring thick slurry, maintaining the pressure at 1MPa for 5min, compacting to obtain a 50mm plate, and airing in a shade to obtain the rock-magnesium floating bead plate.
Example 9
Rock magnesium floating bead plate
Preparing a magnesium sulfate solution: and (3) outsourcing powdery magnesium sulfate, adding water according to the proportion of 1:1, stirring and uniformly mixing to prepare 50wt% of magnesium sulfate solution for later use.
Preparing a rock-magnesium floating bead plate, firstly weighing the following raw materials in parts by weight: 283.1 kg of magnesium oxide, 353.8 kg of magnesium sulfate solution, 53 kg of floating beads, 12 kg of expanded perlite, 13 kg of graphite particles and 1.1 kg of Portland cement.
Mixing magnesium oxide, floating beads, expanded perlite, graphite particles and silicate cement, and stirring uniformly. Then, the magnesium sulfate solution was added, and stirring and mixing were continued to obtain a viscous slurry. Brushing a layer of release agent in a mold, paving a layer of platinum cloth, pouring thick slurry, maintaining the pressure at 1MPa for 5min, compacting to obtain a 50mm plate, and airing in a shade to obtain the rock-magnesium floating bead plate.
Test example 1
The magnesium rock floating bead plates prepared in examples 3-9 were subjected to strength test, and the fireproof plate was subjected to pressure strength test by using a tester conforming to the standard of GB/T16825.1 test and calibration of a static force uniaxial tester for metallic materials, and the results are shown in the following table. The flame-spraying method is adopted to test the fire resistance of the rock magnesium floating bead plate, and the testing method is as follows: the obtained rock magnesium floating bead plate (50 mm thick) is vertically clamped and fixed, flame spraying and heating are carried out on the front surface of the rock magnesium floating bead plate at the position of about 10cm by adopting a spraying flame burner, temperature sensors are respectively arranged on the front surface and the back surface of the plate, heating is continued until the front surface temperature reaches 410+/-5 ℃, the temperature is kept for 3min, and the back surface temperature value of the rock magnesium floating bead plate is recorded, so that the results are shown in the following table.
TABLE 1 compression strength and fire resistance of rock magnesium floating bead plates with different magnesium oxide and magnesium sulfate solution ratios
| Magnesium oxide/kg | Magnesium sulfate solution/kg | Compressive Strength/MPa | Temperature/. Degree.C | |
| Example 3 | 230 | 460 | 756 | 27.9 |
| Example 4 | 241 | 438 | 813 | 28.0 |
| Example 5 | 250.9 | 418.2 | 802 | 27.9 |
| Example 6 | 260 | 400 | 814 | 28.0 |
| Example 7 | 268.3 | 383.4 | 807 | 27.9 |
| Example 8 | 276 | 368 | 743 | 28.4 |
| Example 9 | 283.1 | 353.8 | 541 | 27.9 |
The test results show that the refractory properties of the rock-magnesium floating bead plates are not greatly different due to different raw material mixing ratios, and the heat insulation properties of the rock-magnesium floating bead plates cannot be shown due to the fact that the heating time of the materials is shorter in the test process. The structural strength of the materials is greatly different, mainly due to the difference of the mixing proportion of magnesium oxide and magnesium sulfate solutions.
Although the total amount of magnesium oxide and magnesium sulfate (in terms of solids) was comparable in each example, the greater amount of magnesium oxide produced resulted in less magnesium sulfate slurry and lower structural strength for the fire-protection panel even though the cement portland cement was used in the same amount.
The amount of magnesium oxide is not preferably less than 240kg or more than 280kg, and the amount of magnesium sulfate solution is not preferably more than 440kg or less than 380kg. Otherwise, the structural strength of the rock-magnesium floating bead plate can be greatly deteriorated. Or, the mass ratio of the magnesium oxide to the magnesium sulfate in the rock-magnesium floating bead plate is in the range of 11-14:20, so that the cooperation of the magnesium oxide and the magnesium sulfate serving as fireproof main components can be better exerted, and the optimization and improvement of the structural strength are achieved.
Example 10
Rock magnesium floating bead plate
Preparing a magnesium sulfate solution: and (3) outsourcing powdery magnesium sulfate, adding water according to the proportion of 1:1, stirring and uniformly mixing to prepare 50wt% of magnesium sulfate solution for later use.
Preparing a rock-magnesium floating bead plate, firstly weighing the following raw materials in parts by weight: 260 kg of magnesium oxide, 400 kg of magnesium sulfate solution, 45 kg of floating beads, 20 kg of expanded perlite, 13 kg of graphite particles and 1.1 kg of Portland cement.
Mixing magnesium oxide, floating beads, expanded perlite, graphite particles and silicate cement, and stirring uniformly. Then, the magnesium sulfate solution was added, and stirring and mixing were continued to obtain a viscous slurry. Brushing a layer of release agent in a mold, paving a layer of glass fiber cloth, pouring viscous slurry, maintaining the pressure at 1MPa for 5min, compacting to obtain a 50mm plate, and airing in a shade to obtain the rock-magnesium floating bead plate.
Example 11
Rock magnesium floating bead plate
Preparing a magnesium sulfate solution: and (3) outsourcing powdery magnesium sulfate, adding water according to the proportion of 1:1, stirring and uniformly mixing to prepare 50wt% of magnesium sulfate solution for later use.
Preparing a rock-magnesium floating bead plate, firstly weighing the following raw materials in parts by weight: 260 kg of magnesium oxide, 400 kg of magnesium sulfate solution, 50.5 kg of floating beads, 13 kg of expanded perlite, 13 kg of graphite particles and 1.1 kg of Portland cement.
Mixing magnesium oxide, floating beads, expanded perlite, graphite particles and silicate cement, and stirring uniformly. Then, the magnesium sulfate solution was added, and stirring and mixing were continued to obtain a viscous slurry. Brushing a layer of release agent in a mold, paving a layer of glass fiber cloth, pouring viscous slurry, maintaining the pressure at 1MPa for 5min, compacting to obtain a 50mm plate, and airing in a shade to obtain the rock-magnesium floating bead plate.
Example 12
Rock magnesium floating bead plate
Preparing a magnesium sulfate solution: and (3) outsourcing powdery magnesium sulfate, adding water according to the proportion of 1:1, stirring and uniformly mixing to prepare 50wt% of magnesium sulfate solution for later use.
Preparing a rock-magnesium floating bead plate, firstly weighing the following raw materials in parts by weight: 260 kg of magnesium oxide, 400 kg of magnesium sulfate solution, 52 kg of floating beads, 13.5 kg of expanded perlite, 13 kg of graphite particles and 1.1 kg of Portland cement.
Mixing magnesium oxide, floating beads, expanded perlite, graphite particles and silicate cement, and stirring uniformly. Then, the magnesium sulfate solution was added, and stirring and mixing were continued to obtain a viscous slurry. Brushing a layer of release agent in a mold, paving a layer of glass fiber cloth, pouring viscous slurry, maintaining the pressure at 1MPa for 5min, compacting to obtain a 50mm plate, and airing in a shade to obtain the rock-magnesium floating bead plate.
Example 13
Rock magnesium floating bead plate
Preparing a magnesium sulfate solution: and (3) outsourcing powdery magnesium sulfate, adding water according to the proportion of 1:1, stirring and uniformly mixing to prepare 50wt% of magnesium sulfate solution for later use.
Preparing a rock-magnesium floating bead plate, firstly weighing the following raw materials in parts by weight: 260 kg of magnesium oxide, 400 kg of magnesium sulfate solution, 52.5 kg of floating beads, 12.5 kg of expanded perlite, 13 kg of graphite particles and 1.1 kg of Portland cement.
Mixing magnesium oxide, floating beads, expanded perlite, graphite particles and silicate cement, and stirring uniformly. Then, the magnesium sulfate solution was added, and stirring and mixing were continued to obtain a viscous slurry. Brushing a layer of release agent in a mold, paving a layer of glass fiber cloth, pouring viscous slurry, maintaining the pressure at 1MPa for 5min, compacting to obtain a 50mm plate, and airing in a shade to obtain the rock-magnesium floating bead plate.
Example 14
Rock magnesium floating bead plate
Preparing a magnesium sulfate solution: and (3) outsourcing powdery magnesium sulfate, adding water according to the proportion of 1:1, stirring and uniformly mixing to prepare 50wt% of magnesium sulfate solution for later use.
Preparing a rock-magnesium floating bead plate, firstly weighing the following raw materials in parts by weight: 260 kg of magnesium oxide, 400 kg of magnesium sulfate solution, 53 kg of floating beads, 12 kg of expanded perlite, 13 kg of graphite particles and 1.1 kg of Portland cement.
Mixing magnesium oxide, floating beads, expanded perlite, graphite particles and silicate cement, and stirring uniformly. Then, the magnesium sulfate solution was added, and stirring and mixing were continued to obtain a viscous slurry. Brushing a layer of release agent in a mold, paving a layer of glass fiber cloth, pouring viscous slurry, maintaining the pressure at 1MPa for 5min, compacting to obtain a 50mm plate, and airing in a shade to obtain the rock-magnesium floating bead plate.
Example 15
Rock magnesium floating bead plate
Preparing a magnesium sulfate solution: and (3) outsourcing powdery magnesium sulfate, adding water according to the proportion of 1:1, stirring and uniformly mixing to prepare 50wt% of magnesium sulfate solution for later use.
Preparing a rock-magnesium floating bead plate, firstly weighing the following raw materials in parts by weight: 260 kg of magnesium oxide, 400 kg of magnesium sulfate solution, 53.5 kg of floating beads, 11 kg of expanded perlite, 13 kg of graphite particles and 1.1 kg of Portland cement.
Mixing magnesium oxide, floating beads, expanded perlite, graphite particles and silicate cement, and stirring uniformly. Then, the magnesium sulfate solution was added, and stirring and mixing were continued to obtain a viscous slurry. Brushing a layer of release agent in a mold, paving a layer of glass fiber cloth, pouring viscous slurry, maintaining the pressure at 1MPa for 5min, compacting to obtain a 50mm plate, and airing in a shade to obtain the rock-magnesium floating bead plate.
Example 16
Rock magnesium floating bead plate
Preparing a magnesium sulfate solution: and (3) outsourcing powdery magnesium sulfate, adding water according to the proportion of 1:1, stirring and uniformly mixing to prepare 50wt% of magnesium sulfate solution for later use.
Preparing a rock-magnesium floating bead plate, firstly weighing the following raw materials in parts by weight: 260 kg of magnesium oxide, 400 kg of magnesium sulfate solution, 57 kg of floating beads, 9 kg of expanded perlite, 13 kg of graphite particles and 1.1 kg of Portland cement.
Mixing magnesium oxide, floating beads, expanded perlite, graphite particles and silicate cement, and stirring uniformly. Then, the magnesium sulfate solution was added, and stirring and mixing were continued to obtain a viscous slurry. Brushing a layer of release agent in a mold, paving a layer of glass fiber cloth, pouring viscous slurry, maintaining the pressure at 1MPa for 5min, compacting to obtain a 50mm plate, and airing in a shade to obtain the rock-magnesium floating bead plate.
Test example 2
The magnesium-rock floating bead plates prepared in examples 10 to 16 were subjected to strength test by the method of reference test example 1, and the strength test was performed using a fire-proof plate pressure tester conforming to GBT 16825.1 standard, and the results are shown in the following table. The flame-retardant property of the magnesium rock floating bead plate is tested by adopting a flame spraying method, and the results are shown in the following table.
Table 2 compressive strength and fire resistance properties of magnesium-rock floating bead plates obtained from different floating bead and expanded perlite ratios
| Floating beads/kg | Expanded perlite/kg | Compressive Strength/MPa | Fire resistance/°c | |
| Example 10 | 45 | 20 | 723 | 29.1 |
| Example 11 | 50.5 | 13 | 792 | 28.6 |
| Example 12 | 52 | 13.5 | 833 | 28.7 |
| Example 13 | 52.5 | 12.5 | 821 | 27.9 |
| Example 14 | 53 | 12 | 816 | 28.0 |
| Example 15 | 53.5 | 11 | 792 | 27.9 |
| Example 16 | 57 | 9 | 752 | 34.2 |
The test results show that the amount of the floating beads and the expanded perlite added and applied in the rock-magnesium floating bead plate has less influence on the compressive strength and the fire resistance of the material, but better structural strength and fire resistance can be obtained by properly optimizing the proportion of the floating beads and the expanded perlite. The proportion of the floating beads is increased, so that the structural strength can be improved to a certain extent, but after the using amount of the floating beads is too high, the structural strength is reduced instead, probably due to the fact that the coarse particles and the fine particles in the material mixing proportion are mutually matched in a synergistic manner.
Meanwhile, the fire resistance of the material also fluctuates to a certain extent, mainly because of whether the floating beads and the expanded perlite form continuous gradation or not to block heat. From the above test results, it was found that it is advantageous to select a ratio of floating beads to expanded perlite between 52:13.2 and 53:12. Alternatively, 50-53.5 parts of floating beads are preferred, and 52-53 parts of floating beads are preferred. Alternatively, 11-13.2 parts of expanded perlite is preferred, and 12-13.2 parts of expanded perlite is preferred.
Examples 17 to 20
Referring to the method of test example 2 after the above example 16, according to the mixing proportion relation of the raw material components in the following table, the rock-magnesium floating bead fireproof layers with different proportions are prepared. Two rock magnesium floating bead plates are stacked to form a 100mm plate, a 0.8mm galvanized plate is adopted to package the plate to form a 100mm fireproof plate, and the compressive strength of the plate is tested.
| Magnesium oxide | Magnesium sulfate solution | Floating bead | Expanded perlite | Graphite particles | Modifying agent | Compressive Strength/MPa | |
| Example 17 | 245 | 386 | 56 | 13 | 13 | 1.1 | 865 |
| Example 18 | 250 | 396 | 53 | 12 | 12.5 | 1.1 | 878 |
| Example 19 | 243 | 405 | 50 | 11 | 12 | 1.1 | 872 |
| Example 20 | 248 | 410 | 51 | 12 | 14 | 1.1 | 885 |
The rock magnesium floating bead plate prepared by the raw materials in the proportion has good overall structural strength, and meets the fireproof and heat-insulating requirements. Two rock magnesium floating bead plates are stacked to form a 100mm plate, a 0.8mm galvanized plate is adopted to be packaged to form a 100mm fireproof plate, and the 100mm fireproof plate is conveyed to a urban river weir fireproof detection center to be detected to be qualified, and the fireproof performance exceeds 4 hours.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. The rock magnesium floating bead plate is characterized in that the main body structure of the rock magnesium floating bead plate is prepared from the following raw materials in parts by weight: 220-280 parts of magnesium oxide, 380-410 parts of magnesium sulfate solution, 45-60 parts of floating beads, 10-15 parts of expanded perlite, 10-15 parts of graphite particles and 1-1.5 parts of modifier.
2. The rock-magnesium floating bead plate according to claim 1, wherein the rock-magnesium floating bead plate is prepared from the following raw materials in parts by weight: 255-265 parts of magnesium oxide, 385-405 parts of magnesium sulfate solution, 50-55 parts of floating beads, 11-14 parts of expanded perlite, 11-14 parts of graphite particles and 1-1.2 parts of modifier.
3. The rock-magnesium floating bead plate according to claim 1, wherein the magnesium sulfate solution is prepared by adding water into magnesium sulfate powder, stirring and mixing uniformly to obtain slurry with the concentration of 40-60% by weight.
4. The rock-magnesium floating bead plate according to claim 1, wherein the mixing ratio of the magnesium oxide to the magnesium sulfate is 12-14:20.
5. The magnesium rock floating bead plate according to claim 1, wherein the weight ratio of the floating beads to the expanded perlite is 50-55:13.
6. The magnesium rock floating bead plate according to claim 1, wherein the thickness of the magnesium rock floating bead plate body is 40-150 mm.
7. A magnesium rock floating bead plate according to claim 1, wherein said floating beads are 8-60 mesh floating beads.
8. A magnesium rock floating bead panel according to claim 1, wherein the modifier is a structural enhancer.
9. The magnesium rock floating bead plate according to claim 1, wherein glass fiber cloth or platinum cloth is covered on the surface of the magnesium rock floating bead plate main body.
10. The method for preparing the rock-magnesium floating bead plate according to any one of claims 1 to 9, comprising the following steps:
s1, adding water into magnesium sulfate powder, stirring and mixing uniformly to prepare slurry with the concentration of 40-60% by weight for later use;
s2, mixing the magnesium oxide, the floating beads, the expanded perlite, the graphite particles and the modifier, and uniformly stirring; then adding the magnesium sulfate solution, and continuously stirring and uniformly mixing to obtain mixed slurry;
s3, introducing the mixed slurry into a mold, covering the surface with glass fiber cloth or platinum cloth, pressurizing for 1-5MPa, and maintaining the pressure for 5-10min for molding;
s4, taking out the pressed plate from the die, and naturally air-drying for 1-7 days to obtain the rock-magnesium floating bead plate.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103242025A (en) * | 2013-04-12 | 2013-08-14 | 张家港长盛伟业建材有限公司 | Magnesium board |
| CN111268999A (en) * | 2020-03-09 | 2020-06-12 | 上海香飘防火板制造有限公司 | Special PLASTIC LAMINATED in tunnel top |
| CN111892376A (en) * | 2020-07-28 | 2020-11-06 | 刘雪军 | Magnesium sulfate board and preparation method thereof |
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| CN103242025A (en) * | 2013-04-12 | 2013-08-14 | 张家港长盛伟业建材有限公司 | Magnesium board |
| CN111268999A (en) * | 2020-03-09 | 2020-06-12 | 上海香飘防火板制造有限公司 | Special PLASTIC LAMINATED in tunnel top |
| CN111892376A (en) * | 2020-07-28 | 2020-11-06 | 刘雪军 | Magnesium sulfate board and preparation method thereof |
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