CN115259871B - Magnesia heat insulation plate and preparation method and application thereof - Google Patents
Magnesia heat insulation plate and preparation method and application thereof Download PDFInfo
- Publication number
- CN115259871B CN115259871B CN202210936840.3A CN202210936840A CN115259871B CN 115259871 B CN115259871 B CN 115259871B CN 202210936840 A CN202210936840 A CN 202210936840A CN 115259871 B CN115259871 B CN 115259871B
- Authority
- CN
- China
- Prior art keywords
- magnesium
- magnesite
- parts
- magnesium insulation
- insulation board
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000009413 insulation Methods 0.000 title claims abstract description 86
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 239000000395 magnesium oxide Substances 0.000 title claims description 20
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 title description 37
- 239000001095 magnesium carbonate Substances 0.000 claims abstract description 81
- 235000014380 magnesium carbonate Nutrition 0.000 claims abstract description 81
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims abstract description 81
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims abstract description 81
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 75
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 75
- 239000011777 magnesium Substances 0.000 claims abstract description 75
- 239000000843 powder Substances 0.000 claims abstract description 30
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000011148 porous material Substances 0.000 claims abstract description 28
- 238000001035 drying Methods 0.000 claims abstract description 26
- 229910052751 metal Inorganic materials 0.000 claims abstract description 22
- 239000002184 metal Substances 0.000 claims abstract description 22
- 239000004927 clay Substances 0.000 claims abstract description 21
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000002994 raw material Substances 0.000 claims abstract description 17
- 239000011819 refractory material Substances 0.000 claims abstract description 10
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 22
- 238000002156 mixing Methods 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 18
- 235000015895 biscuits Nutrition 0.000 claims description 14
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 13
- 229910052710 silicon Inorganic materials 0.000 claims description 13
- 239000010703 silicon Substances 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 8
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 claims description 8
- 229930006000 Sucrose Natural products 0.000 claims description 8
- 239000008103 glucose Substances 0.000 claims description 8
- 239000005720 sucrose Substances 0.000 claims description 8
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 claims description 7
- OWEGMIWEEQEYGQ-UHFFFAOYSA-N 100676-05-9 Natural products OC1C(O)C(O)C(CO)OC1OCC1C(O)C(O)C(O)C(OC2C(OC(O)C(O)C2O)CO)O1 OWEGMIWEEQEYGQ-UHFFFAOYSA-N 0.000 claims description 6
- 229930091371 Fructose Natural products 0.000 claims description 6
- 239000005715 Fructose Substances 0.000 claims description 6
- RFSUNEUAIZKAJO-ARQDHWQXSA-N Fructose Chemical compound OC[C@H]1O[C@](O)(CO)[C@@H](O)[C@@H]1O RFSUNEUAIZKAJO-ARQDHWQXSA-N 0.000 claims description 6
- GUBGYTABKSRVRQ-PICCSMPSSA-N Maltose Natural products O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@@H]1O[C@@H]1[C@@H](CO)OC(O)[C@H](O)[C@H]1O GUBGYTABKSRVRQ-PICCSMPSSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- GUBGYTABKSRVRQ-QUYVBRFLSA-N beta-maltose Chemical compound OC[C@H]1O[C@H](O[C@H]2[C@H](O)[C@@H](O)[C@H](O)O[C@@H]2CO)[C@H](O)[C@@H](O)[C@@H]1O GUBGYTABKSRVRQ-QUYVBRFLSA-N 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 5
- 238000000748 compression moulding Methods 0.000 claims description 3
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 230000003628 erosive effect Effects 0.000 abstract description 10
- 239000011230 binding agent Substances 0.000 abstract description 5
- 238000013012 foaming technology Methods 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 229910052839 forsterite Inorganic materials 0.000 description 4
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 2
- MIDXCONKKJTLDX-UHFFFAOYSA-N 3,5-dimethylcyclopentane-1,2-dione Chemical compound CC1CC(C)C(=O)C1=O MIDXCONKKJTLDX-UHFFFAOYSA-N 0.000 description 2
- 235000013736 caramel Nutrition 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910001629 magnesium chloride Inorganic materials 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- -1 2 parts Chemical compound 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 240000007817 Olea europaea Species 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
-
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
-
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
-
- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/0051—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof characterised by the pore size, pore shape or kind of porosity
-
- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/007—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof characterised by the pore distribution, e.g. inhomogeneous distribution of pores
-
- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M5/00—Casings; Linings; Walls
- F23M5/02—Casings; Linings; Walls characterised by the shape of the bricks or blocks used
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/04—Casings; Linings; Walls; Roofs characterised by the form, e.g. shape of the bricks or blocks used
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/40—Metallic constituents or additives not added as binding phase
- C04B2235/402—Aluminium
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5436—Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, i.e. from 1 to 100 micron
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Thermal Insulation (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention provides a magnesium insulation board, a preparation method and application thereof, wherein pore diameters of pores in the magnesium insulation board are distributed gradually, and the pore sizes and the porosities of the pores are gradually increased from the bottom to the top of the magnesium insulation board; the raw materials of the magnesium insulation board comprise magnesite aggregate, magnesite powder, soft clay, silica micropowder, metal aluminum powder and sugar solution; the invention combines the thermal foaming technology, and utilizes the weight of the blank body to form a structure with gradually changed air holes; the magnesite is used as a main raw material, the sugar solution is used as a binding agent, and a specific drying mode is utilized, so that the production cost is reduced, and the binding strength is improved; the obtained magnesium heat-insulating plate has excellent heat-insulating performance and erosion resistance, high breaking strength, low heat conductivity coefficient, low cost and simple preparation process, and can greatly prolong the service life of the heat-insulating plate by being used as a refractory material, thereby having good application prospect.
Description
Technical Field
The invention belongs to the technical field of refractory materials, and particularly relates to a magnesium insulation board and a preparation method and application thereof.
Background
The magnesium heat-insulating plate is a common refractory material at the parts of a tundish and the like, the refractory material at the parts can be directly contacted with molten steel, slag, covering agent and the like in the steelmaking continuous casting production process, and the magnesium heat-insulating plate needs to bear the erosion, scouring and penetration of the molten steel and slag, and has more severe service conditions. The magnesium insulation board has the characteristics of small volume density, high porosity, low heat conductivity, good heat preservation effect and the like, and has the capability of purifying molten steel.
CN101544506B discloses a raw material formulation of a tundish insulation board, wherein the raw materials (mass percent) comprise 30-50% of olive sand, 15-25% of magnesia, 25-40% of waste magnesia bricks, 4-8% of magnesium chloride and 0.2-0.5% of hardener; the method comprises the following steps of adopting the raw material formula of the tundish heat-insulating plate to manufacture the tundish heat-insulating plate: 1) Preparing raw materials, mixing and stirring; 2) Adding water accounting for 5.5-7.5% of the total mass of the raw materials into the stirred raw materials, mixing and stirring for 3-5min, and then placing the raw materials into a mould for vibration molding; 3) Demolding after molding for 1-2 hours; 4) And the demoulded tundish insulating board enters a drying room for baking, wherein the baking temperature is 120-150 ℃ and the baking time is 6-8 hours. The method adopts magnesium chloride as a binding agent, has no smoke and pungent smell in baking and use, is suitable for smelting clean steel and ultra-low carbon steel, and simplifies the production process, reduces operators and reduces the production cost and equipment investment due to the casting molding of the die.
CN110563474B discloses an aluminum-magnesium refractory insulation board, which comprises the following components in mass: 100 parts of refractory fiber, 1-15 parts of calcium aluminate, 1-20 parts of silanol, 1-15 parts of aluminum sulfate, 1-3 parts of oxalic acid, 0.5-2 parts of polyacrylamide and 200-500 parts of water; has the effects of fire resistance and heat insulation, light weight and good construction performance.
However, in the prior art, the magnesia heat insulation plate has high porosity and low heat conductivity coefficient, but the high porosity also reduces the slag erosion and penetration resistance of the refractory material. In addition, the current magnesia heat-insulating plate takes electric melting or sintering magnesia as a main raw material, and a large amount of energy is consumed in the preparation process of the raw materials, so that the preparation cost of the magnesia heat-insulating plate is increased.
In order to solve the problems, there is a need to develop a magnesium insulation board with excellent erosion resistance and penetration resistance, excellent heat insulation performance and low cost, which meets the development requirement of continuous casting production.
Disclosure of Invention
The invention aims to provide a magnesia heat-insulating plate and a preparation method and application thereof, wherein magnesite is used as a main raw material, so that the preparation cost of a refractory material is reduced; the sugar solution is used as a binding agent, so that the binding strength between blanks is improved; the prepared magnesium insulation board has excellent heat insulation performance and erosion resistance, high flexural strength, low heat conductivity coefficient, low cost and simple preparation process, can be used as a refractory material to greatly prolong the service life, and has good application prospect.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
in a first aspect, the invention provides a magnesium insulation board, wherein pore diameters of pores in the magnesium insulation board are distributed gradually, and pore sizes and porosities of the pores are gradually increased from the bottom to the top of the magnesium insulation board;
the raw materials of the magnesium insulation board comprise magnesite aggregate, magnesite powder, soft clay, silica micropowder, metal aluminum powder and sugar solution.
In the magnesium insulation board, the side with smaller air holes is relatively compact, can be directly contacted with molten steel, ensures erosion resistance, is relatively loose, and can further improve the heat insulation performance of the magnesium insulation board.
According to the invention, magnesite is used as a main raw material, magnesium oxide formed by the magnesite in the baking process is in a porous structure, pore diameters of air holes generated by decomposition are small, and the magnesia heat insulation plate is endowed with more excellent heat insulation performance; in addition, the pores generated by the decomposition of magnesite are mostly of closed pore structures, so that slag cannot permeate into the pores, and the integral erosion resistance of the magnesia heat insulation plate is ensured; finally, the magnesite contains a small amount of CaO and SiO 2 、Fe 2 O 3 、Al 2 O 3 The impurities can form a low-melting phase in the service process, so that the sintering of the magnesium insulation board is promoted, and the structural integrity of the material is improved.
As a preferable technical scheme of the invention, the raw materials of the magnesium insulation board comprise 60-70 parts by mass of magnesite aggregate, 8-16 parts by mass of magnesite powder, 8-12 parts by mass of soft clay, 6-12 parts by mass of silica micropowder, 2-6 parts by mass of metal aluminum powder and 4-12 parts by mass of sugar solution.
The magnesite aggregate is 60-70 parts, such as 60 parts, 61 parts, 62 parts, 63 parts, 64 parts, 65 parts, 66 parts, 67 parts, 68 parts, 69 parts or 70 parts; the magnesite powder is 8-16 parts, for example, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts or 16 parts; the soft clay is 8-12 parts, for example, 8 parts, 9 parts, 10 parts, 11 parts or 12 parts; the silicon micropowder is 6-12 parts, for example, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts or 12 parts; 2-6 parts of metal aluminum powder, such as 2 parts, 3 parts, 4 parts, 5 parts or 6 parts; the sugar solution may be 4 to 12 parts, for example, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts or 12 parts, but is not limited to the listed values, and other non-listed values within the above-mentioned range are equally applicable.
As a preferable technical scheme of the invention, in the magnesite aggregate, the content of the magnesite aggregate with the grain size of 3-5mm is 35-50wt%, the content of the magnesite aggregate with the grain size of 1-3mm is 25-40wt%, and the content of the magnesite aggregate with the grain size of 0.1-1mm is 10-25wt%.
The magnesite aggregate has a particle size of 3-5mm, the magnesite aggregate content is 35-50wt%, the particle size is 3-5mm, for example, 3mm, 3.2mm, 3.6mm, 4mm, 4.3mm, 4.7mm or 5mm, the magnesite aggregate content is 35-50wt%, for example, 35wt%, 40wt%, 42wt%, 46wt%, 50wt%, 53wt% or 55wt%; the magnesite aggregate with the grain size of 1-3mm is 25-40wt%, the grain size of 1-3mm, such as 1mm, 1.3mm, 1.5mm, 1.8mm, 2mm, 2.2mm, 2.5mm, 2.7mm or 3mm, and the content of 25-40wt%, such as 25wt%, 27wt%, 30wt%, 32wt%, 35wt%, 38wt% or 40wt%; the magnesite aggregate having a particle size of 0.1-1mm is contained in an amount of 10-25wt%, the particle size is 0.1-1mm, for example, 0.1mm, 0.2mm, 0.4mm, 0.5mm, 0.6mm, 0.8mm or 1mm, and the magnesite aggregate having a particle size of 10-25wt%, for example, 10wt%, 12wt%, 14wt%, 18wt%, 20wt%, 22wt% or 25wt%, but the present invention is not limited to the above-mentioned values, and other values not listed in the above-mentioned range are applicable.
It is worth noting that, in the invention, the magnesite aggregate with the grain size of 3-5mm does not comprise the magnesite aggregate with the grain size of 3 mm; the magnesite aggregate with the grain size of 1-3mm comprises magnesite aggregate with the grain size of 3mm and does not comprise magnesite aggregate with the grain size of 1 mm; the magnesite aggregate with the grain size of 0.1-1mm comprises magnesite aggregate with the grain size of 1 mm.
In a preferred embodiment of the present invention, the particle size of the magnesite powder is not more than 0.088mm, and may be, for example, 0.001mm, 0.010mm, 0.020mm, 0.030mm, 0.040mm, 0.050mm, 0.060mm, 0.070mm, 0.080mm or 0.088mm, but the present invention is not limited to the above-mentioned values, and other values not shown in the above-mentioned numerical ranges are equally applicable.
Preferably, the MgO content in the magnesite powder is not less than 50wt%, for example, 50wt%, 53wt%, 56wt%, 60wt%, 65wt%, 70wt%, 72wt%, 77wt%, 80wt%, 83wt%, 86wt%, 90wt%, 92wt% or 96wt%, but is not limited to the recited values, and other non-recited values within the above-mentioned range are equally applicable.
The particle size of the soft clay is preferably not more than 0.088mm, and may be, for example, 0.001mm, 0.010mm, 0.020mm, 0.030mm, 0.040mm, 0.050mm, 0.060mm, 0.070mm, 0.080mm or 0.088mm, but not limited to the above-mentioned values, and other values not mentioned in the above-mentioned numerical ranges are equally applicable.
Preferably, in the soft clay, al 2 O 3 The content of (C) may be 30wt%, 33wt%, 37wt%, 40wt%, 42wt%, 46wt%, 50wt%, 54wt%, 58wt%, 60wt%, 64wt%, 68wt%, 70wt%, 75wt%, 80wt%, 85wt%, 90wt% or 95wt%, for example, but is not limited to the recited values, and other non-recited values within the above-recited ranges may be equally applied.
In a preferred embodiment of the present invention, the particle size of the fine silica powder is not more than 1. Mu.m, for example, 0.1. Mu.m, 0.2. Mu.m, 0.3. Mu.m, 0.4. Mu.m, 0.5. Mu.m, 0.6. Mu.m, 0.7. Mu.m, 0.8. Mu.m, 0.9. Mu.m, or 1. Mu.m, but the fine silica powder is not limited to the above-mentioned values, and other values not listed in the above-mentioned numerical ranges are similarly applicable.
PreferablyIn the silicon micropowder, siO 2 The content of (C) may be 95wt%, 95.5wt%, 96wt%, 96.5wt%, 97wt%, 97.5wt%, 98wt%, 98.5wt%, 99wt% or 99.5wt%, for example, but is not limited to the values recited, and other values not recited in the above ranges are equally applicable.
The particle diameter of the metal aluminum powder is preferably not more than 5. Mu.m, and may be, for example, 0.5. Mu.m, 1. Mu.m, 1.5. Mu.m, 2. Mu.m, 2.5. Mu.m, 3. Mu.m, 3.5. Mu.m, 4.5. Mu.m, or 5. Mu.m, but is not limited to the above-mentioned values, and other values not listed in the above-mentioned value ranges are equally applicable.
Preferably, the aluminum content of the metal aluminum powder is equal to or greater than 99wt%, and may be, for example, 99wt%, 99.1wt%, 99.2wt%, 99.3wt%, 99.4wt%, 99.5wt%, 99.6wt%, 99.7wt%, 99.8wt%, or 99.9wt%, but is not limited to the recited values, and other non-recited values within the above-recited values are equally applicable.
In a preferred embodiment of the present invention, the sugar solution has a solute content of 20 to 60wt%, for example, 20wt%, 25wt%, 30wt%, 35wt%, 40wt%, 45wt%, 50wt%, 55wt% or 60wt%, but the present invention is not limited to the above-mentioned values, and other values not mentioned in the above-mentioned ranges are equally applicable.
Preferably, the solute of the sugar solution comprises any one or a combination of at least two of sucrose, glucose, fructose or maltose, typical but non-limiting examples of which include a combination of sucrose and glucose, a combination of sucrose and fructose, a combination of sucrose and maltose, a combination of glucose and fructose, a combination of glucose and maltose, and a combination of fructose and maltose.
Preferably, the solvent of the sugar solution comprises water.
In a second aspect, the present invention provides a method for preparing the magnesium insulation board according to the first aspect, the method comprising the following steps:
(1) Firstly mixing magnesite aggregate and a sugar solution to obtain a first mixed material; carrying out second mixing on magnesite powder, soft clay, silicon micropowder and metal aluminum powder with the first mixed material to obtain a second mixed material;
(2) The second mixed material in the step (1) is subjected to material trapping and compression molding in sequence to obtain a biscuit;
(3) And (3) sequentially carrying out first drying and second drying on the biscuit in the step (2) to obtain the magnesium insulation board.
The invention combines the thermal foaming technology, and utilizes the weight of the blank body to form a gradual change structure with one side of big air holes and one side of small air holes; according to the invention, sugar solution is used as a binding agent, and sugar is dehydrated and condensed to generate caramel and carbon dioxide during first drying, so that the blank body starts to expand to different degrees to form a gradual porous structure; and in the second drying process, the residual caramel is further reacted with air and oxidized into carbon dioxide and water, organic components are completely oxidized, and meanwhile, the metal aluminum powder starts to oxidize and melt, so that the bonding strength between blanks is improved.
In a preferred embodiment of the present invention, the time of the first mixing in the step (1) is 5-15min, for example, 5min, 6min, 7min, 8min, 9min, 10min, 11min, 12min, 13min, 14min, and 15min, but the present invention is not limited to the above-mentioned values, and other values not listed in the above-mentioned value ranges are equally applicable.
Preferably, the second mixing time in step (1) is 15-20min, for example, 15min, 15.5min, 16min, 16.5min, 17min, 17.5min, 18min, 18.5min, 19min, 19.5min or 20min, but not limited to the recited values, and other non-recited values within the above range are equally applicable.
The temperature of the trapped material in the step (2) is preferably 10 to 30 ℃, and may be, for example, 10 ℃, 12 ℃, 14 ℃, 16 ℃, 18 ℃, 20 ℃, 22 ℃, 24 ℃, 26 ℃, 28 ℃ or 30 ℃, but is not limited to the values listed, and other values not listed in the above-mentioned value ranges are equally applicable.
Preferably, the time of the trapping material in the step (2) is 12-24h, for example, 12h, 13h, 14h, 15h, 16h, 17h, 18h, 19h, 20h, 21h, 22h, 23h or 24h, but not limited to the listed values, and other non-listed values in the above range are equally applicable.
Preferably, the pressure of the press molding in the step (2) is 20 to 50MPa, for example, 20MPa, 23MPa, 25MPa, 27MPa, 30MPa, 33MPa, 35MPa, 38MPa, 40MPa, 42MPa, 45MPa, 47MPa or 50MPa, but the pressure is not limited to the above-mentioned values, and other values not mentioned in the above-mentioned value ranges are equally applicable.
In a preferred embodiment of the present invention, the temperature of the first drying in the step (3) is 190 to 240. DegreeC, for example, 190. DegreeC, 195. DegreeC, 200. DegreeC, 205. DegreeC, 210. DegreeC, 215. DegreeC, 220. DegreeC, 225. DegreeC, 230. DegreeC, 235. DegreeC, 240. DegreeC, but not limited to the values listed, and other values not listed in the above-mentioned value range are equally applicable.
Preferably, the time of the first drying in the step (3) is 3-6h, for example, 3h, 3.2h, 3.7h, 4h, 4.3h, 4.6h, 5h, 5.4h, 5.8h or 6h, but not limited to the recited values, and other non-recited values in the above range are equally applicable.
Preferably, the temperature of the second drying in the step (3) is 400-700 ℃, for example, 400 ℃, 450 ℃, 500 ℃, 550 ℃, 600 ℃, 650 ℃ or 700 ℃, but the second drying is not limited to the listed values, and other non-listed values in the above-mentioned range are equally applicable.
Preferably, the second drying time in step (3) is 3-8h, for example, 3h, 3.5h, 4h, 4.5h, 5h, 5.5h, 6h, 6.5h, 7h, 7.5h or 8h, but not limited to the recited values, and other non-recited values within the above range are equally applicable.
The preparation method of the magnesium insulation board is worth to be explained, and comprises the following steps:
(1) Firstly mixing 60-70 parts of magnesite aggregate and 4-12 parts of sugar solution for 5-15min to obtain a first mixed material; mixing 8-16 parts of magnesite powder with the particle size less than or equal to 0.088mm, 8-12 parts of soft clay with the particle size less than or equal to 0.088mm, 6-12 parts of silicon micro powder with the particle size less than or equal to 1 mu m, 2-6 parts of metal aluminum powder with the particle size less than or equal to 5 mu m with the first mixed material for 15-20min to obtain a second mixed material;
wherein, the content of the magnesite aggregate with the grain diameter of 3-5mm in the magnesite aggregate is 35-50wt%,the content of the magnesite aggregate with the grain size of 1-3mm is 25-40wt%, and the content of the magnesite aggregate with the grain size of 0.1-1mm is 10-25wt%; the content of solute in the sugar solution is 20-60wt%; the solute of the sugar solution comprises any one or a combination of at least two of sucrose, glucose, fructose or maltose, and the solvent comprises water; the MgO content in the magnesite powder is more than or equal to 50wt%; al in soft clay 2 O 3 The content of (2) is more than or equal to 30wt%; siO in the silicon micropowder 2 The content of (2) is more than or equal to 95wt%; the aluminum content of the metal aluminum powder is more than or equal to 99wt%;
(2) The second mixed material is trapped for 12-24 hours at the temperature of 10-30 ℃; pressing and forming at 20-50MPa to obtain a biscuit;
(3) The biscuit in the step (2) is first dried for 3 to 6 hours at the temperature of 190 to 240 ℃; and (3) drying for 3-8 hours at 400-700 ℃ to obtain the magnesium insulation board.
In a third aspect, the present invention provides the use of a magnesium insulation panel according to the first aspect as a refractory material.
The numerical ranges recited herein include not only the above-listed point values, but also any point values between the above-listed numerical ranges that are not listed, and are limited in space and for the sake of brevity, the present invention is not intended to be exhaustive of the specific point values that the stated ranges include.
Compared with the prior art, the invention has the following beneficial effects:
(1) According to the magnesium insulation board and the preparation method thereof, the weight of a blank body is utilized to form a structure with gradually changed air holes by combining a thermal foaming technology; the magnesite is used as a main raw material, the sugar solution is used as a binding agent, and a specific drying mode is utilized, so that the production cost is reduced, and the binding strength between blanks is improved;
(2) The magnesia heat-insulating plate has excellent heat-insulating performance and erosion resistance, high breaking strength, low heat conductivity coefficient, low cost and simple preparation process, can greatly prolong the service life of the magnesia heat-insulating plate by being used as a refractory material, and has good application prospect.
Drawings
FIG. 1 is a cross-sectional view of a magnesium insulation panel according to example 1 of the present invention;
FIG. 2 is a graph showing the pore size distribution of the bottom of the magnesium insulation panel according to example 1 of the present invention;
fig. 3 is a graph showing the pore size distribution of the top of the magnesium insulation panel obtained in example 1 of the present invention.
Detailed Description
The technical scheme of the invention is further described by the following specific embodiments. It will be apparent to those skilled in the art that the examples are merely to aid in understanding the invention and are not to be construed as a specific limitation thereof.
It is worth noting that in the specific embodiment of the invention, the grain size of the magnesite powder is less than or equal to 0.088mm; the particle size of the soft clay is less than or equal to 0.088mm; the grain diameter of the silicon micropowder is less than or equal to 1 mu m; the grain diameter of the metal aluminum powder is less than or equal to 5 mu m.
Example 1
The embodiment provides a magnesium insulation board and a preparation method thereof, wherein the preparation method of the magnesium insulation board comprises the following steps:
(1) Carrying out first mixing on 60 parts of magnesite aggregate and 12 parts of sugar solution for 15min to obtain a first mixed material; mixing 10 parts of magnesite powder, 10 parts of soft clay, 8 parts of silicon micropowder and 2 parts of metal aluminum powder with the first mixed material for 20min to obtain a second mixed material;
wherein, in the magnesite aggregate, the content of the magnesite aggregate with the grain size of 3-5mm is 50wt%, the content of the magnesite aggregate with the grain size of 1-3mm is 40wt%, and the content of the magnesite aggregate with the grain size of 0.1-1mm is 10wt%; the content of solute in the sugar solution was 50wt%; the solute of the sugar solution is sucrose, and the solvent is water; the MgO content in the magnesite powder is 70wt%; al in soft clay 2 O 3 The content of (2) is 35wt%; siO in the silicon micropowder 2 The content of (2) is 98wt%; the aluminum content of the metal aluminum powder is 99wt%;
(2) The second mixed material is trapped for 24 hours at 20 ℃ in the step (1); pressing and forming at 50MPa to obtain a biscuit;
(3) The biscuit in the step (2) is first dried for 6 hours at 220 ℃; and (5) drying for 5 hours at 550 ℃ to obtain the magnesium insulation board.
The cross-sectional morphology of the magnesium insulation board obtained in the embodiment is shown in fig. 1, and as can be seen from fig. 1, the pore diameter of the top air hole is obviously larger than that of the bottom air hole, and the pore diameters of the magnesium insulation board are distributed gradually from top to bottom; the pore size distribution of the bottom of the obtained magnesium insulation board is shown in figure 2, and as can be obtained from figure 2, the average pore size of the bottom of the magnesium insulation board is 2.4 mu m; the pore size distribution of the top of the obtained magnesium insulation panel is shown in fig. 3, and as can be seen from fig. 3, the average pore size of the top of the magnesium insulation panel is 19.6 μm.
Example 2
The embodiment provides a magnesium insulation board and a preparation method thereof, wherein the preparation method of the magnesium insulation board comprises the following steps:
(1) Carrying out first mixing on 70 parts of magnesite aggregate and 10 parts of sugar solution for 10min to obtain a first mixed material; carrying out second mixing on 16 parts of magnesite powder, 12 parts of soft clay, 12 parts of silica micropowder and 3 parts of metal aluminum powder with the first mixed material for 15min to obtain a second mixed material;
wherein, in the magnesite aggregate, the content of the magnesite aggregate with the grain size of 3-5mm is 50wt%, the content of the magnesite aggregate with the grain size of 1-3mm is 25wt%, and the content of the magnesite aggregate with the grain size of 0.1-1mm is 25wt%; the content of solute in the sugar solution was 60wt%; the solute of the sugar solution is glucose, and the solvent is water; the MgO content in the magnesite powder is 50wt%; al in soft clay 2 O 3 The content of (2) is 30wt%; siO in the silicon micropowder 2 The content of (2) is 95wt%; the aluminum content of the metal aluminum powder is 99wt%;
(2) The second mixed material is trapped for 12 hours at the temperature of 30 ℃; pressing and forming at 20MPa to obtain a biscuit;
(3) The biscuit in the step (2) is first dried for 3 hours at 240 ℃; and (5) performing secondary drying at 400 ℃ for 8 hours to obtain the magnesium insulation board.
Example 3
The embodiment provides a magnesium insulation board and a preparation method thereof, wherein the preparation method of the magnesium insulation board comprises the following steps:
(1) Carrying out first mixing on 65 parts of magnesite aggregate and 4 parts of sugar solution for 5min to obtain a first mixed material; carrying out second mixing on 8 parts of magnesite powder, 8 parts of soft clay, 6 parts of silicon micropowder and 6 parts of metal aluminum powder with the first mixed material for 20min to obtain a second mixed material;
wherein, in the magnesite aggregate, the content of the magnesite aggregate with the grain size of 3-5mm is 35wt%, the content of the magnesite aggregate with the grain size of 1-3mm is 40wt%, and the content of the magnesite aggregate with the grain size of 0.1-1mm is 25wt%; the content of solute in the sugar solution was 20wt%; the solute of the sugar solution is sucrose and glucose, and the solvent is water; the MgO content in the magnesite powder is 80wt%; al in soft clay 2 O 3 The content of (2) is 50wt%; siO in the silicon micropowder 2 The content of (2) is 95wt%; the aluminum content of the metal aluminum powder is 99wt%;
(2) The second mixed material is trapped for 20 hours at the temperature of 10 ℃; compacting and forming at 40MPa to obtain a biscuit;
(3) The biscuit in the step (2) is first dried for 6 hours at 190 ℃; and (3) drying for 3 hours at 700 ℃ to obtain the magnesium insulation board.
Comparative example 1
This comparative example provides a magnesium insulation board and a method for manufacturing the same, which is different from the method for manufacturing example 1 only in that: the equal mass of the sugar solution in the step (1) is replaced by phenolic resin.
Comparative example 2
This comparative example provides a magnesium insulation board and a method for manufacturing the same, which is different from the method for manufacturing example 1 only in that: in the step (1), the equal mass of the magnesite aggregate is replaced by forsterite aggregate, and the equal mass of the magnesite powder is replaced by forsterite powder.
The performance of the magnesium insulation panels obtained in the above examples and comparative examples was tested as follows:
pore diameters of pores at the top and the bottom of the magnesium insulation board: measured using an Autopore 9501 type IV mercury porosimeter from Mickey corporation;
volume density of top and bottom of magnesium insulation panel: measuring by adopting an Archimedes drainage method;
thermal conductivity of the top and the bottom of the magnesium insulation board: measuring by adopting a flat plate heat conduction method;
flexural strength of magnesium insulation board: the three-point bending method is adopted for measurement;
the results of the above tests are shown in Table 1.
TABLE 1
From table 1, the following points can be found:
(1) It can be seen from examples 1 to 3 that the top and bottom of the magnesium insulation panel obtained by the present invention have different pore sizes, bulk densities and thermal conductivities; the top air hole has large size, small volume density, low heat conductivity and excellent heat insulation performance; the bottom air hole has small size, large volume density, high heat conductivity and excellent erosion resistance; not only meets the corrosion resistance requirement of the magnesium heat-insulating plate, but also realizes the heat-insulating performance;
(2) Comparing example 1 with comparative example 1, the comparative example 1 replaces the equal mass of the sugar solution with phenolic resin, so that the difference of the pore structures at the top and the bottom of the magnesium insulation board is not large, and the requirements of corrosion resistance, heat insulation and heat preservation of the magnesium insulation board cannot be met at the same time;
(3) Comparing example 1 with comparative example 2, the top heat insulation performance and bottom erosion resistance of the composite material are reduced because the comparative example 2 replaces the equal mass of magnesite aggregate with forsterite aggregate and the equal mass of magnesite powder with forsterite powder.
The applicant declares that the above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be apparent to those skilled in the art that any changes or substitutions that are easily conceivable within the technical scope of the present invention disclosed by the present invention fall within the scope of the present invention and the disclosure.
Claims (21)
1. The magnesium insulation board is characterized in that pore diameters of pores in the magnesium insulation board are distributed gradually, and the pore sizes and the porosities of the pores are gradually increased from the bottom to the top of the magnesium insulation board;
the raw materials of the magnesium insulation board comprise 60-70 parts by mass of magnesite aggregate, 8-16 parts by mass of magnesite powder, 8-12 parts by mass of soft clay, 6-12 parts by mass of silica micropowder, 2-6 parts by mass of metal aluminum powder and 4-12 parts by mass of sugar solution;
in the magnesite aggregate, the content of the magnesite aggregate with the grain size of 3-5mm is 35-50wt%, the content of the magnesite aggregate with the grain size of 1-3mm is 25-40wt%, and the content of the magnesite aggregate with the grain size of 0.1-1mm is 10-25wt%;
the magnesium insulation board is prepared by adopting the following preparation method, and the preparation method comprises the following steps:
(1) Firstly mixing magnesite aggregate and a sugar solution to obtain a first mixed material; carrying out second mixing on magnesite powder, soft clay, silicon micropowder and metal aluminum powder with the first mixed material to obtain a second mixed material;
(2) The second mixed material in the step (1) is subjected to material trapping and compression molding in sequence to obtain a biscuit;
(3) Sequentially carrying out first drying and second drying on the biscuit in the step (2) to obtain a magnesium insulation board;
the temperature of the first drying in the step (3) is 190-240 ℃;
the temperature of the second drying in the step (3) is 400-700 ℃.
2. A magnesium insulation panel according to claim 1 wherein the particle size of the magnesite powder is less than or equal to 0.088mm.
3. A magnesium insulation panel according to claim 1 wherein the MgO content of the magnesite powder is greater than or equal to 50wt%.
4. The magnesium insulation panel according to claim 1, wherein the particle size of the soft clay is 0.088mm or less.
5. The magnesium insulation panel according to claim 1, wherein Al in the soft clay 2 O 3 The content of (2) is more than or equal to 30wt%.
6. A magnesium insulation panel according to claim 1 wherein the particle size of the fine silica powder is 1 μm or less.
7. A magnesium insulation panel according to claim 1, wherein said fine silica powder comprises SiO 2 The content of (2) is more than or equal to 95 weight percent.
8. The magnesium insulation panel according to claim 1, wherein the particle size of the metal aluminum powder is 5 μm or less.
9. The magnesium insulation panel according to claim 1, wherein the aluminum content of the metal aluminum powder is not less than 99wt%.
10. A magnesium insulation panel according to claim 1 wherein the solute content of the sugar solution is 20-60wt%.
11. The magnesium insulation panel of claim 1 wherein the solute of the sugar solution comprises any one or a combination of at least two of sucrose, glucose, fructose or maltose.
12. A magnesium insulation panel according to claim 1 wherein the solvent of the sugar solution comprises water.
13. A method of producing a magnesium insulation panel according to any one of claims 1 to 12, wherein the method comprises the steps of:
(1) Firstly mixing magnesite aggregate and a sugar solution to obtain a first mixed material; carrying out second mixing on magnesite powder, soft clay, silicon micropowder and metal aluminum powder with the first mixed material to obtain a second mixed material;
(2) The second mixed material in the step (1) is subjected to material trapping and compression molding in sequence to obtain a biscuit;
(3) Sequentially carrying out first drying and second drying on the biscuit in the step (2) to obtain a magnesium insulation board;
the temperature of the first drying in the step (3) is 190-240 ℃;
the temperature of the second drying in the step (3) is 400-700 ℃.
14. The method of claim 13, wherein the first mixing in step (1) is for a period of time ranging from 5 to 15 minutes.
15. The method of claim 13, wherein the second mixing in step (1) is for a period of 15-20 minutes.
16. The method of claim 13, wherein the temperature of the trapped material in step (2) is 10-30 ℃.
17. The method of claim 13, wherein the time for the trapping in step (2) is 12-24 hours.
18. The method according to claim 13, wherein the pressure of the press molding in the step (2) is 20 to 50MPa.
19. The method of claim 13, wherein the first drying in step (3) is for a period of 3 to 6 hours.
20. The method of claim 13, wherein the second drying in step (3) is performed for a period of 3 to 8 hours.
21. Use of a magnesium insulation panel according to any of claims 1-12, wherein the magnesium insulation panel is used as a refractory material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210936840.3A CN115259871B (en) | 2022-08-05 | 2022-08-05 | Magnesia heat insulation plate and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210936840.3A CN115259871B (en) | 2022-08-05 | 2022-08-05 | Magnesia heat insulation plate and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115259871A CN115259871A (en) | 2022-11-01 |
| CN115259871B true CN115259871B (en) | 2023-05-12 |
Family
ID=83748446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210936840.3A Active CN115259871B (en) | 2022-08-05 | 2022-08-05 | Magnesia heat insulation plate and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115259871B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1323985C (en) * | 2004-06-02 | 2007-07-04 | 武汉科技大学 | Periclase-olivine light thermal-insulated fireproof materials and method for preparing same |
| US20070111878A1 (en) * | 2005-11-16 | 2007-05-17 | Bilal Zuberi | Extrudable mixture for forming a porous block |
| CN101328071B (en) * | 2008-07-31 | 2011-05-18 | 武汉科技大学 | Magnesia-calcia dry type working liner for tundish and preparation thereof |
| RO128489B1 (en) * | 2011-11-28 | 2018-04-27 | Universitatea Tehnică Din Cluj-Napoca | Settling device for preparing gradual sintered porous materials |
| CN102795870B (en) * | 2012-09-10 | 2013-09-11 | 武汉科技大学 | Light-weight magnesia brick and preparation method thereof |
| CN103030415A (en) * | 2013-01-17 | 2013-04-10 | 武汉科技大学 | High-performance forsterite refractory raw material and preparation method thereof |
| CN105777187B (en) * | 2016-03-24 | 2018-05-04 | 西安建筑科技大学 | A kind of magnesia light weight refractory material and preparation method thereof |
| CN108101544B (en) * | 2017-12-14 | 2020-07-28 | 西安交通大学 | Lamellar gradient porous silicon carbide ceramic and preparation method thereof |
-
2022
- 2022-08-05 CN CN202210936840.3A patent/CN115259871B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN115259871A (en) | 2022-11-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101172868A (en) | ZrO* containing magnesium carbon brick and method for producing the same | |
| CN106542843B (en) | A method for preparing lightweight thermal insulation wall material by using solid waste | |
| EP3237356B1 (en) | Use of refractory products | |
| JP2018505834A (en) | Refractories and their use | |
| CN112194465B (en) | Tundish dry material and preparation method thereof | |
| CN113999027B (en) | Corundum-mullite castable for zinc oxide rotary kiln and preparation method thereof | |
| CN106518043B (en) | The preparation method of the siliceous bottom brick of molten tin bath of low-cost aluminum calcium | |
| CN113582714B (en) | Heat insulation ceramic with high closed porosity and preparation method and application thereof | |
| CN108530090B (en) | Light tundish working lining and preparation method thereof | |
| CN102424595A (en) | Preparation method of hard corrosion-resistant alumina fiberboard furnace material | |
| CN115259871B (en) | Magnesia heat insulation plate and preparation method and application thereof | |
| DE19702254A1 (en) | Highly porous moulding especially light construction block | |
| DE3613697A1 (en) | MONOLITHIC, FIRE-RESISTANT HONEYCOMB FILTERS FOR METAL MELTING | |
| CN115304384B (en) | Alkali return prevention aluminum-silicon castable and preparation method thereof | |
| CN103449830A (en) | Light-weight aluminum-silicon aggregate and preparation method thereof | |
| CN109320280B (en) | Air-permeable material for converter and preparation method thereof | |
| CN107365150A (en) | One kind is low to lead magnesium-aluminum-zirconium composite brick and preparation method thereof | |
| CN1069563C (en) | Magnesium tundish paint for conticasting steel | |
| CN117843352B (en) | Casting material for blast furnace tapping channel | |
| CN1418853A (en) | Method for preparing light ceramic material and use thereof | |
| CN109133987A (en) | A kind of corundum-spinel gas permeable material and preparation method thereof | |
| CN115650702A (en) | Environment-friendly continuous casting tundish dry material and preparation method thereof | |
| WO2006051793A1 (en) | Fire brick for bottom portion of float bath and method for production thereof | |
| CN1262973A (en) | Conticasting tundish composite material block stopper and its production method | |
| CN112573899A (en) | Low-frequency sound insulation brick and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |