CN114988891A - Aluminum silicate fiber-containing semi-heavy castable for coke pot cover and preparation method thereof - Google Patents
Aluminum silicate fiber-containing semi-heavy castable for coke pot cover and preparation method thereof Download PDFInfo
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- CN114988891A CN114988891A CN202210498218.9A CN202210498218A CN114988891A CN 114988891 A CN114988891 A CN 114988891A CN 202210498218 A CN202210498218 A CN 202210498218A CN 114988891 A CN114988891 A CN 114988891A
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- Prior art keywords
- aluminum silicate
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- coke
- granularity
- semi
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- 239000000835 fiber Substances 0.000 title claims abstract description 94
- 239000000571 coke Substances 0.000 title claims abstract description 57
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000005266 casting Methods 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 23
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 20
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 16
- 229910052863 mullite Inorganic materials 0.000 claims abstract description 16
- 239000004568 cement Substances 0.000 claims abstract description 15
- 239000002002 slurry Substances 0.000 claims abstract description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 8
- 239000002270 dispersing agent Substances 0.000 claims abstract description 6
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 6
- 239000010703 silicon Substances 0.000 claims abstract description 6
- 238000004806 packaging method and process Methods 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 claims description 6
- FWVCSXWHVOOTFJ-UHFFFAOYSA-N 1-(2-chloroethylsulfanyl)-2-[2-(2-chloroethylsulfanyl)ethoxy]ethane Chemical compound ClCCSCCOCCSCCCl FWVCSXWHVOOTFJ-UHFFFAOYSA-N 0.000 claims description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims 1
- 238000000465 moulding Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 25
- 239000010959 steel Substances 0.000 description 25
- 239000002245 particle Substances 0.000 description 23
- 230000000694 effects Effects 0.000 description 20
- 238000004321 preservation Methods 0.000 description 16
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 14
- 229910052593 corundum Inorganic materials 0.000 description 13
- 239000010431 corundum Substances 0.000 description 13
- 238000009413 insulation Methods 0.000 description 13
- 239000000919 ceramic Substances 0.000 description 11
- 230000008569 process Effects 0.000 description 10
- 238000010276 construction Methods 0.000 description 9
- 229910001570 bauxite Inorganic materials 0.000 description 7
- 238000005245 sintering Methods 0.000 description 7
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 6
- 239000011324 bead Substances 0.000 description 6
- 238000007667 floating Methods 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 230000006378 damage Effects 0.000 description 5
- 239000003292 glue Substances 0.000 description 5
- 235000019832 sodium triphosphate Nutrition 0.000 description 5
- 239000004793 Polystyrene Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 229920002223 polystyrene Polymers 0.000 description 4
- 238000010298 pulverizing process Methods 0.000 description 4
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical class O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 229910010271 silicon carbide Inorganic materials 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 2
- 229910000423 chromium oxide Inorganic materials 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000011863 silicon-based powder Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910052845 zircon Inorganic materials 0.000 description 2
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- GVKDLCPTYCLSQW-YFKNTREVSA-N C(\C=C/C(=O)OC(C)CCCCCC)(=O)OC(C)CCCCCC.[Na] Chemical group C(\C=C/C(=O)OC(C)CCCCCC)(=O)OC(C)CCCCCC.[Na] GVKDLCPTYCLSQW-YFKNTREVSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- RRDQTXGFURAKDI-UHFFFAOYSA-N formaldehyde;naphthalene-2-sulfonic acid Chemical group O=C.C1=CC=CC2=CC(S(=O)(=O)O)=CC=C21 RRDQTXGFURAKDI-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004312 hexamethylene tetramine Substances 0.000 description 1
- 235000010299 hexamethylene tetramine Nutrition 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- 239000011226 reinforced ceramic Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 1
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- 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
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
-
- 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
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/428—Silicon
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- 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
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
- C04B2235/5216—Inorganic
- C04B2235/522—Oxidic
- C04B2235/5228—Silica and alumina, including aluminosilicates, e.g. mullite
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- 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
- C04B2235/5427—Particle size related information expressed by the size of the particles or aggregates thereof millimeter or submillimeter sized, i.e. larger than 0,1 mm
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- 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
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/602—Making the green bodies or pre-forms by moulding
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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- C04B2235/606—Drying
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
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- 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
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- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Products (AREA)
Abstract
The semi-heavy castable material containing aluminum silicate fibers for the coke pot cover comprises the following raw materials in percentage by weight: ceramsite with the granularity of more than or equal to 1-8 mm: 15-20%; ceramsite with granularity less than 1 mm: 3-10%; spherical mullite lightweight aggregate with the granularity of 3-1 mm: 10-20%; mullite powder with the granularity less than or equal to 0.088 mm: 30-45%; silicon micropowder: 3-8%; aluminum silicate fiber: 0.9 to 7.5 percent; high-alumina cement: 15-25%; dispersant FDN: 0.05-0.5%; and (3) penetrant T: 0.01-0.5%; adding water accounting for 5.5-9.0% of the total weight of the raw materials in two times. The preparation method comprises the following steps: mixing aluminum silicate fiber, penetrant T and water; mixing the rest raw materials; preparing into slurry; casting and molding; naturally drying; baking; and (5) packaging for later use. The bulk density of the invention is 1.40-1.6 g/cm 3 The apparent porosity is 30-45%, the normal-temperature compressive strength after drying at 110 ℃ for 24h is 20-40 MPa, the service cycle is not less than 24 months, and the cost can be reduced by more than 40%.
Description
Technical Field
The invention relates to a castable and a preparation method thereof, in particular to a high-temperature-resistant semi-heavy castable containing aluminum silicate fibers for a coke pot and a preparation method thereof.
Background
In the coking production, a coke tank is a transportation tool from a coke oven to a dry quenching furnace for quality inspection, and when the coke tank is transported to the position below the dry quenching furnace, a coke tank cover is added for lifting in order to protect equipment and a steel structure. Coke can covers have been filled with fiber primarily and have been subject to chalking and burning over long periods of use. The bottom refractory material is easy to fall off, and the internal structure of the coke jar cover is easy to burn after the protection of the refractory material is lost; in addition, the coke tank cover is not tightly sealed, and the outer edge of the coke tank cover can be burnt by exposed red coke flame, so that the steel structure is deformed and burnt, and the operation environment is influenced. And the burnt charcoal volume in the coke drum if surpassing the volume of coke drum, piles up a closed angle, and the lifting machine is when mentioning the coke drum, and coke drum lid bottom can be withstood by the coke of piling up, causes the coke drum lid to close not tightly and takes place crooked, also can arouse the damage of coke drum lid top heat preservation, and the heat preservation drops and can make coke drum lid life-span reduce.
In order to protect the coke tank cover, a manufacturer adopts the technical measure of integrally pouring a layer of pouring material on the inner wall of the tank cover when the coke tank cover is heightened. Although the light castable poured integrally on site has good integrity, can effectively prevent fire from burning out a steel plate of a tank cover through gaps of fiber cotton, and the tank cover is not deformed and damaged, the common use of the light castable is high-aluminum castable or high-aluminum castable containing steel fiber or a small number of clay castable, which has the defects of large volume density and poor heat preservation effect.
After retrieval:
the construction method and the equipment of the steel fiber-containing castable disclosed in the Chinese patent CN1579722A use a jet-casting machine to convey the self-flowing castable containing steel fiber, which is stirred by water or other blending liquid, to a construction position, and the construction is carried out by selecting a casting or wet jet mode. Because of adopting mechanized mixing and conveying, the construction process of the casting material is continuous and uninterrupted, and the continuous and uniform casting construction body is ensured to be formed. Compared with the traditional construction process, the pouring construction of the permanent lining of the tundish shortens the operation time by at least 30 percent. Can reduce the loss of raw materials and is beneficial to the environmental protection of an operation area. Besides constructing a new lining body, the method is particularly suitable for maintaining and repairing the lining body. The convenience advantages of pumping casting and wet spraying are particularly prominent for remote or high operating points. The invention is a heavy castable, so the heat preservation effect is not good, the coke jar cover has small volume and needs less materials, and the pumping time is not easy to control; this document differs from the feedstock of the present invention, mainly in the heavy bauxite-based high-alumina feedstock.
The Chinese patent publication No. CN1830903 discloses a refractory fiber castable material, which is prepared from refractory fiber cotton, polystyrene particles, floating beads, ultrafine powder, high-alumina powder, pure calcium aluminate cement, sodium tripolyphosphate and polyvinyl alcohol solution in a proportion by adding water, rinsing, pulping, dewatering, pulverizing, mixing with other components, weighing, and packaging. The weight ratio of the components is as follows: refractory cellucotton Al 2 O 3 More than or equal to 45 percent, L less than or equal to 5mm, 65-72 percent; polystyrene particles D is less than or equal to 3mm, 0.5-2%; floating bead Al 2 O 3 More than or equal to 28 percent and 4 to 12 percent; 3-9% of superfine powder; high-aluminium powder material less than or equal to 0.088mm, Al 2 O 3 More than or equal to 80 percent and 6 to 10 percent; pure calcium aluminate cement Al 2 O 3 More than or equal to 72 percent, CaO less than or equal to 22 percent and 10 to 12 percent; 0.1-0.2% of sodium tripolyphosphate; adding: 1.5-2% of polyvinyl alcohol solution 30-45%. The content of the refractory cellucotton is 65-72 percent, the polystyrene particles are 0.5-2 percent, the floating beads are 4-12 percent, the density of the casting material is too small and light, although the heat preservation effect is good, coke in a coke pot is accumulated and is easy to prop through a casting layer, the casting material is easy to burn and damage, and the casting material is not suitable for a coke pot cover.
The self-reinforced ceramic fiber castable disclosed by the document with the Chinese patent publication No. CN101328073A is prepared by mixing ceramic fiber particles with the particle size of 3-8 mm and ceramic fiber particles with the particle size of 1-2 mm into graded ceramic fiber particles through batching, and then mixing the graded ceramic fiber particles with matrix slurry, wherein the content (weight) of each component is 70-10% of the graded ceramic fiber particles and 30-90% of the matrix slurry. The matrix slurry is formed by mixing basic ingredients and polyvinyl alcohol solution with the addition of 30-45% of the basic ingredients, wherein the content ranges of the basic ingredients (by weight, 100%) are 10-40% of short ceramic fibers with the length of less than or equal to 7 mm, 70-40% of ceramic powder with the particle size of less than or equal to 0.088mm, 5-10% of foaming agent, 0.5-5% of plasticizer and 14.5-5% of high-temperature bonding agent. Although the casting material prepared by the invention has the characteristics of high temperature resistance, good heat insulation performance and high strength, and the ceramic fibers in the furnace lining are not pulverized after long-term use at high temperature, the casting material contains 10-40% of short ceramic fibers and 5-10% of foaming agent, foams depending on the forming process, is difficult to control the appearance, has too many internal pores, is easy to push through a casting layer due to coke accumulation in a coke tank, is easy to burn and damage, and is not suitable for coke tank covers.
The Chinese patent publication No. CN101152744A discloses a fiber casting material for a lining of a heating furnace, which is prepared from 58-68% of ceramic fiber and SiO micropowder 2 +ZrO 2 Not less than 97%, 8-10% of floating bead, 18-25% of rho-Al 2 O 3 5-7 percent of sodium tripolyphosphate with the thickness less than or equal to 0.088mm, 0.15-0.2 percent of polystyrene balls with the thickness less than or equal to 2mm, 0.5-1 percent of carboxymethyl cellulose powder with the thickness less than or equal to 0.2-0.3 percent; in the production process, all fibers are carried out in a moisture-preserved state, the process of dry cutting the balls by using a fiber spraying machine in the traditional process is changed, the generation of fiber dust is reduced, the harm to human bodies is avoided, the efficiency is greatly improved, and the prepared fiber castable has the advantages of small shrinkage, difficult pulverization, low volume weight and low cost. The invention has 58 to 68 percent of ceramic fiber and 18 to 25 percent of floating bead, the density of the casting material is too small and light, the heat preservation effect is good, but coke in the coke pot is accumulated and is easy to push through the casting layer, and the fiber is easy to burn and pulverize and is not suitable for the coke pot cover.
The Chinese patent publication No. CN101734934A discloses a high-strength steel fiber castable, which is prepared from the following raw materials in parts by weight: 2.5 parts of bauxite material with the granularity of 8-5mm, 2.3 parts of bauxite material with the granularity of more than 0.075mm and less than 5mm, 2 parts of brown corundum particle material with the granularity of 3-1mm, 0.8 part of bauxite material with the granularity of less than or equal to 0.075mm, 0.4 part of alumina superfine powder with the granularity of less than or equal to 0.025mm, 0.6 part of silicon carbide powder with the granularity of less than or equal to 0.075mm, 0.3 part of silicon micropowder with the granularity of less than 0.019mm, 0.6 part of CA-70 cement, 0.5 part of brown corundum powder with the granularity of less than 0.053mm 446, 0.2 part of heat-resistant steel fiber, 0.02 part of explosion-proof steel fiber, 0.1% of total material weight of sodium tripolyphosphate and 0.08% of total material weight of sodium hexametaphosphate. The product has the advantages of high compressive strength, high breaking strength, high softening temperature under load, good thermal shock resistance stability, micro-expansion characteristic at high temperature, good wear resistance and the like. The invention is a heavy castable, has poor heat preservation effect and is not suitable for coke jar covers.
The Chinese patent publication No. CN104446268A discloses a steel fiber castable for a torpedo ladle nozzle, which is prepared by mixing the following raw materials in parts by weight: high-alumina aggregate: 15-25 parts of particles with the particle size of more than 5mm and less than or equal to 8mm, 20-30 parts of particles with the particle size of more than 3mm and less than or equal to 5mm, and 20-30 parts of particles with the particle size of more than 0mm and less than or equal to 3 mm; high-alumina powder: 10-15 parts; white alundum powder: 5-10 parts; silicon micropowder SiO 2 More than or equal to 93%: 3-8 parts; aluminum oxide Al 2 O 3 Micro-powder: 2-5 parts; steel fiber: 0.2-1 part; cr (chromium) component 2 O 3 Not less than 99% of chromium oxide green: 0.3-0.8 part; metal aluminum powder: 0.01-0.03 part; the raw materials are uniformly mixed, 5-10 parts of CA-80 pure aluminate cement, 0.02-0.1 part of sodium tripolyphosphate and 0.02-0.08 part of resin are added, and the materials are mixed, ground and uniformly stirred to obtain the steel fiber castable for the torpedo tank opening. The invention is a heavy castable, has poor heat preservation effect and is not suitable for coke pot covers.
The document with Chinese patent publication No. CN2595804Y discloses a granular refractory fiber castable, which is composed of a refractory castable substrate and light waterproof refractory fiber particles; the light waterproof fireproof fiber particles consist of a waterproof layer, a fireproof fiber rod and an air bin. The material has small volume density, light weight and good heat preservation and insulation effects; waterproof and good in thermal stability; the strength is high, the cracking is not easy to occur, and the service life is long; the oven drying time is short, the water drainage is easy, and the operation is convenient. The granular refractory fiber castable disclosed by the invention has the advantages of too low and too light density, good heat insulation effect, easiness in pushing through a casting layer due to coke accumulation in a coke tank, easiness in burning and pulverization of fibers and unsuitability for a coke tank cover.
The Chinese patent publication No. CN110066181A is prepared from the following raw materials in parts by weight: 30-40 parts of compact corundum, 20-35 parts of white corundum, 10-15 parts of silicon carbide, 1-3 parts of silicon oxide micro powder, 5-10 parts of aluminum oxide micro powder, 1-5 parts of modified silica sol, 0.5-3 parts of composite additive, 1-3 parts of chromium oxide, 1-3 parts of magnesium oxide and 3-8 parts of cement; the modified silica sol is modified and added into the raw materials, so that the modified silica sol is combined with the corundum-carbide castable, and the modified silica sol has good construction performance and can be quickly cured and baked; compared with the traditional cement binding material, the material can effectively avoid the bursting property during maintenance and rapid baking, shortens the construction period and the baking period, and has better volume stability, thermal state strength, shock resistance and corrosion resistance. The invention is a heavy castable, has poor heat preservation effect and is not suitable for coke pot covers.
The Chinese patent publication No. CN101805198A discloses a mullite steel fiber castable which comprises 29-40% of brown corundum, 10-15% of bauxite chamotte, 18-32% of sintered mullite, 8-12% of fused mullite, 3-7% of silica micropowder, 2-5% of a coagulant and 1-3% of stainless steel fiber; the process comprises the following steps: the mullite steel fiber castable prepared by the technical scheme of the invention has higher compressive strength and rupture strength and large volume density compared with the existing common high-aluminum castable. The invention has good thermal shock resistance, erosion resistance and volume stability, but the invention is a heavy castable material, has poor heat preservation effect and is not suitable for coke pot covers.
The flue gas vacuum insulation pipe comprises a steel pipe main body, wherein a vacuum cavity and a castable accommodating cavity are arranged in the pipe wall of the steel pipe main body, the shapes of the vacuum cavity and the castable accommodating cavity correspond to the shape of the steel pipe main body, the vacuum cavity and the castable accommodating cavity are coaxial, the distance from the castable accommodating cavity to the inner pipe wall of the steel pipe main body is less than the distance from the vacuum cavity to the inner pipe wall of the steel pipe main body, and the zirconia fiber refractory castable comprises the following raw materials in parts by weight, namely 40-50 parts of aggregate, 45-50 parts of powder and 5-10 parts of additive, wherein the aggregate is composed of high alumina, corundum, zircon and silicon carbide; the powder material consists of bauxite chamotte powder, alpha-Al 2O3 powder, magnesium oxide, yttrium oxide and silicon micropowder; the additive consists of hexamethylenetetramine, phenolic resin and zirconia fiber, a penetration hole is formed in the inner pipe wall of the steel pipe main body and is communicated with the castable accommodating cavity, and thus, the zirconia fiber refractory castable seeps out of the penetration hole and forms a zirconia fiber refractory castable layer; the outer wall of the annular embedding arm is provided with a heat insulation glue containing annular groove, the outer side wall of the annular embedding groove is provided with a heat insulation glue containing annular groove, the pipe wall of the steel pipe main body is provided with a heat insulation glue injection hole, and the heat insulation glue injection hole is communicated with the heat insulation glue containing annular groove on the outer side wall of the annular embedding groove; the first refractory castable pouring hole penetrates through the isolation arm between the vacuum cavity and the annular embedded groove and then is communicated with the castable containing cavity, and the second refractory castable pouring hole penetrates through the isolation arm between the vacuum cavity and the annular embedded arm and then is communicated with the castable containing cavity. The corundum is one or a mixture of more of plate corundum, fused white corundum, fused brown corundum, fused compact corundum and sub-white corundum in any proportion. Mixing high-alumina bauxite clinker, corundum, zircon and silicon carbide, and processing the mixture into coarse aggregate, medium aggregate and fine aggregate, wherein the particle size of the coarse aggregate is 4.0-3.0 mm; the particle size of each component in the medium aggregate is 1.5-1.0 mm; the particle size of the fine aggregate is 0.4-0.3 mm, and the length of the zirconia fiber is 1.2-1.0 mm; the weight parts of the coarse aggregate, the medium aggregate and the fine aggregate are 25 parts of coarse aggregate, 45 parts of medium aggregate and 30 parts of fine aggregate. A small amount of zirconia fiber is added, but the zirconia fiber is heavy castable, has poor heat preservation effect and is not suitable for coke pot covers.
From literature retrieval, the coke can cover contains the steel fiber heavy castable, has large volume density, poor heat preservation performance and poor heat preservation performance, and is easy to burn; the light castable containing excessive fiber or floating beads has too low volume density, low strength and many air holes, a pouring layer is easily pushed through by coke in a coke tank, and fiber pulverization causes burning loss of a steel structure of the coke tank cover.
Disclosure of Invention
The invention aims to overcome the defect of poor heat insulation performance caused by a castable containing steel fibers in the prior art, and provides a castable with the volume density of 1.40-1.6 g/cm 3 The apparent porosity is 30-45%, the normal-temperature compressive strength after drying at 110 ℃ for 24h is 20-40 MPa, the normal-temperature compressive strength after burning at 1000 ℃ for 3h is 20-35 MPa, the replacement period is prolonged to not less than 24 months, and the cost can be reduced by more than 40%.
The measures for realizing the aim are as follows:
the semi-heavy castable containing the aluminum silicate fiber for the coke pot cover comprises the following raw materials in percentage by weight: ceramsite with the granularity of more than or equal to 1-8 mm: 15-20%; ceramsite with granularity less than 1 mm: 3-10%; spherical mullite lightweight aggregate with the granularity of 3-1 mm: 10-20%; mullite powder with the granularity less than or equal to 0.088 mm: 30-45%; silicon micropowder: 3-8%; aluminum silicate fiber: 0.9 to 7.5 percent; high-alumina cement: 15-25%; dispersant FDN: 0.05-0.5%; and (3) a penetrant T: 0.01-0.5%; adding water accounting for 5.5-9.0% of the total weight of the raw materials in two times.
Preferably: the weight percentage content of the aluminum silicate fiber is 1.3-7.1%.
Preferably: the aluminum silicate fiber comprises the components of alumina with the weight percentage content not less than 65% and the use temperature not less than 1100 ℃.
Preferably: the weight percentage content of the penetrating agent T is 0.05-0.35%.
It is characterized in that: the bulk density of the ceramsite is not more than 900kg/m 3 Not less than 600kg/m 3 The using temperature is not lower than 1100 ℃.
It is characterized in that: the volume density of the spherical mullite lightweight aggregate is not more than 1.6g/cm 3 Not less than 1.4g/cm 3 The using temperature is not lower than 1300 ℃.
It is characterized in that: the mass percentage content of alumina in the high-alumina cement is not less than 50%.
A preparation method of a semi-heavy castable material containing aluminum silicate fiber for a coke oven cover comprises the following steps:
1) mixing and uniformly stirring aluminum silicate fibers, a penetrant T and added water, wherein the added water added for the first time accounts for 65-75% of the total added water, and uniformly stirring;
2) mixing and uniformly stirring the other raw materials;
3) uniformly adding the mixture formed in the step 2) into the mixture in the step 1), and adding the rest 35-25% for the second time
Adding water and stirring into uniform slurry;
4) placing the slurry formed in the step 3) into a forming mold for casting forming;
5) naturally drying for 24h or longer;
6) demolding, baking at 110 deg.C for not less than 24 hr;
7) and (5) packaging for later use.
The action and mechanism of each raw material and main process in the invention
The invention adopts the ceramsite with the granularity of more than or equal to 1 to 8mm and controls the adding amount to be 15 to 20 percent, because the ceramsite with the size has higher strength, certain hardness, a certain amount of hollow air holes, good heat insulation performance and low cost, can be used as the aggregate of the casting material and plays a role in supporting a framework; the amount is less than 15%, the amount is too small and more than 20%, and the amount of the aggregate is too large, which is not beneficial to improving the integral strength.
The invention adopts the ceramsite with the granularity less than 1mm, and controls the adding amount to be 3-10%, because the ceramsite with the fine granularity has certain strength and hardness and good heat insulation performance, the ceramsite can be used as the fine aggregate of the castable to play a role in close packing and filling; the amount is less than 3%, the filling effect is poor and more than 10%, and the filling material is too much to be beneficial to compact packing.
The spherical mullite lightweight aggregate with the granularity of 3-1mm is adopted, and the adding amount is controlled to be 10-20%, because the spherical mullite lightweight aggregate with the granularity of 3-1mm has high strength, certain hardness, high refractoriness and good heat preservation performance, can be used as the aggregate of the castable, and plays a role in supporting a framework; the amount is less than 10%, the aggregate is too little and more than 20%, and the aggregate is too much, which is not beneficial to improving the integral strength.
The mullite powder with the granularity of less than or equal to 0.088mm is adopted, and the addition amount is controlled to be 30-45%, so that the mullite powder with the granularity of less than or equal to 0.088mm has high refractoriness and good thermal destruction resistance, and can play a role in dense sintering of a substrate. The amount is less than 30%, the coating of the aggregate is insufficient and more than 45%, and the fine powder is excessive, so that shrinkage cracks of sintering can be generated.
The silicon powder is adopted, and the addition amount is controlled to be 3-8%, because the silicon powder has good dispersion effect, the sintering is facilitated, and the function of promoting the dense sintering of the matrix can be achieved. The amount is less than 3%, the sintering promoting effect is poor, and more than 8%, the ultra-fine powder is too much, and shrinkage cracks of sintering may occur.
The aluminum silicate fibers are adopted, and the adding amount is controlled to be 0.9-7.5%, because the aluminum silicate fibers have a certain length-diameter ratio, the aluminum silicate fibers can be dispersed in a casting material matrix to play a role in enhancing, the strength is favorably improved, the cracking is reduced, and the heat preservation effect is improved. The content is less than 0.9 percent, the fiber dispersion reinforcing effect is not obvious and is more than 7.5 percent, the fiber is too much, the fiber is easy to stack and is not easy to disperse, and the reinforcing effect cannot be realized. The aluminum silicate fiber adopted by the invention has the composition that the weight percentage content of aluminum oxide is not less than 65 percent, the use temperature is not less than 1100 ℃, and the aluminum silicate fiber is easy to disperse into fiber slurry in the stirring process due to the surface performance of the aluminum silicate fiber treated by the penetrant T, so that a uniform fiber reinforced material is formed in the castable.
The high-alumina cement is adopted, and the addition amount is controlled to be 15-25%, because the high-alumina cement has high bonding strength, the bonding of the lightweight aggregate is facilitated, and the effect of promoting the sintering of the matrix can be achieved. The content is less than 15 percent, the strength is low and is more than 25 percent, and impurities are easily brought in to influence the high-temperature performance.
The dispersant FDN is adopted, and the addition amount is controlled to be 0.05-0.5%, because the dispersant is a beta-naphthalenesulfonate formaldehyde condensate, the dispersant has good cement dispersing effect, and the water consumption for cement combination is reduced. Less than 0.05%, poor water reducing effect, more than 0.5%, high cost and little change of dispersing effect.
The invention adopts the penetrant T, and the addition amount is controlled to be 0.01-0.5%, because the penetrant T is sodium di-sec-octyl maleate sulfonate, belongs to an anionic surfactant, has good surface modification effect on fibers, and is beneficial to dispersion in water. The amount is less than 0.01 percent, the penetrating and dispersing effect is poor and is more than 0.5 percent, the cost is high, and the penetrating and dispersing effect is not changed greatly.
The invention adopts the penetrating agent T, and the preferable adding amount is controlled to be 0.05-0.35%, because the aluminum silicate fiber, the penetrating agent T and the added water are mixed and stirred to form uniform fiber slurry; the other raw materials are mixed and stirred uniformly, then the two mixtures are mixed again, and the rest added water is added to be stirred uniformly to form the casting material, because if all the materials are put together to be mixed, the fibers are easy to be piled up and difficult to disperse uniformly, and the function of fiber reinforcement cannot be achieved. The penetrant T, the aluminum silicate fiber and the added water are uniformly mixed and broken into slurry, the fibers are dispersed, other mixtures are added, the mixture is easily stirred into a uniform castable with certain fluidity, the castable can be formed in a mould by vibration, and the castable is baked for standby after maintenance.
Compared with the prior art, the bulk density of the invention is 1.40-1.6 g/cm 3 The apparent porosity is 30-45%, the normal-temperature compressive strength after drying at 110 ℃ for 24h is 20-40 MPa, the service life is prolonged from 12 months to not less than 24 months, and the cost can be reduced by more than 40%.
Detailed Description
The present invention is described in detail below:
table 1 is a table of raw material contents for each example of the invention;
table 2 is a table of the main process parameters of each embodiment of the present invention;
table 3 is a table of performance testing scenarios for various embodiments of the present invention.
The examples of the invention were produced as follows
1) Mixing and uniformly stirring aluminum silicate fibers, a penetrant T and added water, wherein the added water added for the first time accounts for 65-75% of the total added water, and stirring to form uniform slurry;
2) mixing and uniformly stirring the other raw materials;
3) uniformly adding the mixture formed in the step 2) into the mixture in the step 1), adding the rest 35-25% of the added water for the second time, and stirring to form a uniform castable with certain fluidity;
4) placing the slurry formed in the step 3) into a forming mold for casting forming;
5) naturally drying for 24h or longer;
6) demolding, baking at 110 deg.C for not less than 24 hr;
7) and (5) packaging for later use.
TABLE 1 list of chemical components (wt%) of inventive examples and comparative examples
TABLE 2 List of the main process parameters of the examples of the invention and the comparative examples
Description of the drawings: comparative example 1 the prior art used.
TABLE 3 test result list of mechanical properties of each example and comparative example of the present invention
As can be seen from table 3: the volume density of the castable is 1.40-1.6 g/cm 3 The apparent porosity is 30-45%, the density is about half of that of the alumina steel fiber castable, the coke can cover with the same volume only needs half of the amount of the castable by weight, and the high porosity means good heat insulation performance. The normal-temperature compressive strength after drying at 110 ℃ for 24h is 20-40 MPa, the strength is high, the coke impact resistance is strong, the service cycle is prolonged from 12 months to not less than 24 months, and the use cost is greatly reduced.
The present embodiments are to be considered in all respects as illustrative and not restrictive.
Claims (8)
1. A semi-heavy castable material containing aluminum silicate fibers for a coke oven cover comprises the following raw materials in percentage by weight: ceramsite with the granularity of more than or equal to 1-8 mm: 15-20%; ceramsite with granularity less than 1 mm: 3-10%; spherical mullite lightweight aggregate with the granularity of 3-1 mm: 10-20%; mullite powder with the granularity less than or equal to 0.088 mm: 30-45%; silicon micropowder: 3-8%; aluminum silicate fiber: 0.9 to 7.5 percent; high-alumina cement: 15-25%; dispersant FDN: 0.05-0.5%; and (3) penetrant T: 0.01 to 0.5 percent; adding water accounting for 5.5-9.0% of the total weight of the raw materials in two times.
2. The semi-heavy castable material containing aluminum silicate fibers for coke drum covers as claimed in claim 1, wherein: the weight percentage content of the aluminum silicate fiber is 1.3-7.1%.
3. The semi-heavy castable material containing the alumina silicate fiber for the coke oven cover as claimed in claim 1 or 2, wherein: the aluminum silicate fiber comprises the components of alumina with the weight percentage content not less than 65% and the use temperature not less than 1100 ℃.
4. The semi-heavy castable material for coke drum covers, comprising aluminum silicate fibers, according to claim 1, wherein: the weight percentage content of the penetrating agent T is 0.05-0.35%.
5. The semi-heavy castable material for coke drum covers, comprising aluminum silicate fibers, according to claim 1, wherein: the bulk density of the ceramsite is not more than 900kg/m 3 Not less than 600kg/m 3 The using temperature is not lower than 1100 ℃.
6. The semi-heavy castable material containing aluminum silicate fibers for coke drum covers as claimed in claim 1, wherein: the volume density of the spherical mullite lightweight aggregate is not more than 1.6g/cm 3 Not less than 1.4g/cm 3 The using temperature is not lower than 1300 ℃.
7. The semi-heavy castable material containing aluminum silicate fibers for coke drum covers as claimed in claim 1, wherein: the mass percentage content of alumina in the high-alumina cement is not less than 50%.
8. The method for preparing the aluminum silicate fiber-containing semi-heavy castable material for coke pot covers as claimed in claim 1, comprising the steps of:
1) mixing and uniformly stirring aluminum silicate fibers, a penetrant T and added water, wherein the added water added for the first time accounts for 65-75% of the total added water, and uniformly stirring;
2) mixing and uniformly stirring the other raw materials;
3) uniformly adding the mixture formed in the step 2) into the mixture in the step 1), adding the rest 35-25% of the added water for the second time, and stirring to form uniform slurry;
4) placing the slurry formed in the step 3) into a forming mold for casting forming;
5) naturally drying for 24h or longer;
6) demolding, baking at 110 deg.C for not less than 24 hr;
7) and (5) packaging for later use.
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| CN102351547A (en) * | 2011-07-06 | 2012-02-15 | 马鞍山市泰来冶金炉料有限责任公司 | High strength high temperature resistance semi-lightweight high alumina castable and its preparation method |
| CN103553687A (en) * | 2013-11-09 | 2014-02-05 | 宁夏天纵泓光余热发电技术有限公司 | Heat-insulating fireproof pouring material |
| CN105622112A (en) * | 2014-11-06 | 2016-06-01 | 姚和平 | High-strength lightweight insulating castable |
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2022
- 2022-05-09 CN CN202210498218.9A patent/CN114988891A/en active Pending
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| CN102351547A (en) * | 2011-07-06 | 2012-02-15 | 马鞍山市泰来冶金炉料有限责任公司 | High strength high temperature resistance semi-lightweight high alumina castable and its preparation method |
| CN103553687A (en) * | 2013-11-09 | 2014-02-05 | 宁夏天纵泓光余热发电技术有限公司 | Heat-insulating fireproof pouring material |
| CN105622112A (en) * | 2014-11-06 | 2016-06-01 | 姚和平 | High-strength lightweight insulating castable |
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Application publication date: 20220902 |