CN108751957A - A kind of carbon-free high-purity magnalium pressed machine brick of refined steel ladles and preparation method thereof - Google Patents
A kind of carbon-free high-purity magnalium pressed machine brick of refined steel ladles and preparation method thereof Download PDFInfo
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- CN108751957A CN108751957A CN201810749827.0A CN201810749827A CN108751957A CN 108751957 A CN108751957 A CN 108751957A CN 201810749827 A CN201810749827 A CN 201810749827A CN 108751957 A CN108751957 A CN 108751957A
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- 229910001051 Magnalium Inorganic materials 0.000 title claims abstract description 55
- 239000011449 brick Substances 0.000 title claims abstract description 52
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 27
- 239000010959 steel Substances 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 64
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 53
- 239000010431 corundum Substances 0.000 claims abstract description 31
- 239000007767 bonding agent Substances 0.000 claims abstract description 20
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 239000004411 aluminium Substances 0.000 claims abstract description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000008187 granular material Substances 0.000 claims abstract description 7
- 239000000654 additive Substances 0.000 claims abstract description 5
- 230000000996 additive effect Effects 0.000 claims abstract description 5
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 5
- 230000003647 oxidation Effects 0.000 claims abstract 2
- 238000007254 oxidation reaction Methods 0.000 claims abstract 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 28
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 22
- 239000000203 mixture Substances 0.000 claims description 18
- 239000000126 substance Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 229910018134 Al-Mg Inorganic materials 0.000 claims description 12
- 229910018467 Al—Mg Inorganic materials 0.000 claims description 12
- 229910052749 magnesium Inorganic materials 0.000 claims description 7
- 238000005245 sintering Methods 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 37
- 239000002893 slag Substances 0.000 abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 12
- 230000035939 shock Effects 0.000 abstract description 11
- 230000007797 corrosion Effects 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 7
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 42
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 22
- 239000000395 magnesium oxide Substances 0.000 description 21
- 229910052596 spinel Inorganic materials 0.000 description 16
- 239000011029 spinel Substances 0.000 description 16
- 229910052681 coesite Inorganic materials 0.000 description 13
- 229910052906 cristobalite Inorganic materials 0.000 description 13
- 239000000377 silicon dioxide Substances 0.000 description 13
- 229910052682 stishovite Inorganic materials 0.000 description 13
- 229910052905 tridymite Inorganic materials 0.000 description 13
- 230000008569 process Effects 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 10
- 239000011777 magnesium Substances 0.000 description 10
- 229910052799 carbon Inorganic materials 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 6
- 230000001590 oxidative effect Effects 0.000 description 6
- 238000007670 refining Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 230000005496 eutectics Effects 0.000 description 5
- 238000011065 in-situ storage Methods 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000011265 semifinished product Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229920001353 Dextrin Polymers 0.000 description 2
- 239000004375 Dextrin Substances 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 239000006061 abrasive grain Substances 0.000 description 2
- 238000000498 ball milling Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910001593 boehmite Inorganic materials 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 235000019425 dextrin Nutrition 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910001679 gibbsite Inorganic materials 0.000 description 2
- 238000000713 high-energy ball milling Methods 0.000 description 2
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 229930186657 Lat Natural products 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910017970 MgO-SiO2 Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002742 anti-folding effect Effects 0.000 description 1
- 229920005551 calcium lignosulfonate Polymers 0.000 description 1
- RYAGRZNBULDMBW-UHFFFAOYSA-L calcium;3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Ca+2].COC1=CC=CC(CC(CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O RYAGRZNBULDMBW-UHFFFAOYSA-L 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000007306 functionalization reaction Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- TVHALOSDPLTTSR-UHFFFAOYSA-H hexasodium;[oxido-[oxido(phosphonatooxy)phosphoryl]oxyphosphoryl] phosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O TVHALOSDPLTTSR-UHFFFAOYSA-H 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000003202 long acting thyroid stimulator Substances 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 235000014380 magnesium carbonate Nutrition 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004576 sand Substances 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
- 239000002904 solvent Substances 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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
- C04B35/01—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
- C04B35/10—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 aluminium oxide
- C04B35/101—Refractories from grain sized mixtures
-
- 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
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
-
- 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
- C04B2235/3427—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
- C04B2235/40—Metallic constituents or additives not added as binding phase
- C04B2235/401—Alkaline earth metals
-
- 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
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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
- 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
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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)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses carbon-free high-purity magnalium pressed machine bricks of a kind of refined steel ladles and preparation method thereof, wherein carbon-free high-purity magnalium pressed machine brick, in parts by weight, raw material includes：50~75 parts of corundum in granules；15~35 parts of corundum fine powder；1~5 part of active oxidation aluminium powder；1~55 part of calcined oxide aluminium powder；3~7 parts of metal powder additive；4~10 parts of magnalium Ultramicro-powder bonding agent；1.5~4 parts of water.Carbon-free high-purity magnalium pressed machine brick obtained by the present invention have the characteristics that compact structure, room temperature, in mild elevated temperature strength is high, thermal shock resistance can good, slag corrosion resistance and permeance property it is excellent, can increase substantially service life as the resistance to material of ladle working lining.
Description
Technical field
The invention belongs to Refractory For Steelmaking technical fields, relate generally to a kind of carbon-free high-purity magnalium of refined steel ladles
Pressed machine brick and preparation method thereof.
Background technology
Ladle is the important Thermal Equipment of metallurgical industry, and most original, most basic function are access, transhipment and cast steel
Water.With the fast development and technological progress of metallurgical industry, the requirement of every profession and trade and each field to steel product quality and performance is also got over
Come it is higher, molten steel pour into a mould it is previous as to carry out double refining outside stove, include mainly that desulfurization, degassing, removal are mingled with, adjust molten steel
Ingredient and temperature etc., the main process for making being related to has LF, RH, RH+OB, VD, VOD, LATS etc..Above-mentioned refining process base
This is all completed in ladle so that ladle becomes more functionalization by previous unification in use.
Refining ladle working lining is using traditional carbonaceous article (aluminium-magnesia carbon brick, magnesia-alumina-carbon brick etc.), during use in resistance to material
Carbon can be dissolved into molten steel and lead to the problem of " carburetting ", to influence the smelting process of mild steel, ultra-low-carbon steel steel grade.For
Meet the needs of ladle service life and steel grade are smelted, the resistance to material of refining ladle working lining from carbonaceous article before gradually to low-carbon,
Ultra-low carbon and carbon-free direction are developed.At present both at home and abroad refining ladle working lining using it is more be that cement or gel combine
Magnalium matter or corundum spinel prefabricated section or castable, production and during mainly there is also for the use of following the shortcomings that：
1) carbon free precast block belongs to manpower-intensive in process of production, and low production efficiency, noise are big, mold amount is big, give production management
Process brings big inconvenience；2) for castable, range request height is crossed to Contraction in Site, such environmental effects fluctuate
Larger, early period, baking cycle was long, and the problem of be susceptible to explosion, the problems such as causing ladle turnover unfavorable under abnormal conditions；
3) prefabricated section and castable all have that apparent porosity is high, bulk density is relatively low, use molten steel and slag under process high temperature
The problem of being easy to happen process of osmosis, causing to be easy to happen structure spalling using middle and later periods hot junction position.
The development of the carbon-free pressed machine brick of ladle receives universal attention in recent years, such as patent of invention document CN
107117949 A, CN 106747509 A, CN 103539467 A, CN 102515974 all have been reported that in A etc..But above-mentioned biography
Ladle magnalium matter of uniting or corundum spinel pressed machine brick generally use organic bond such as calcium lignosulfonate, dextrin, carboxylic first
Base cellulose, glycan etc. or inorganic bonding agent aluminous cement, calgon, Quadrafos, magnesium chloride solution, magnalium glue
Agent etc. is tied, the introducing of organic bond can make carbon-free pressed machine brick obtain preferable intensity at normal temperatures, but be organically combined under high temperature
Agent volatilization leaves stomata, and the intensity of material also relative reduction.Inorganic bonding agent can make carbon-free pressed machine brick obtain at normal temperatures compared with
Eager to do well in everything degree, inorganic bonding agent is decomposed under high temperature so that the intensity of material is relatively low.Meanwhile above-mentioned inorganic bonding agent can band
Enter to be corrosive or the fugitive constituent of toxicity (such as Cl, P element), while can also introduce K in the material2O、N2O、CaO、SiO2Deng
Al in impurity, with carbon-free pressed machine brick2O3, the reactions such as MgO form eutectic phase, to the high-temperature behavior for reducing material and anti-steel
Water and slag corrosion performance.On the other hand, the carbon-free pressed machine brick of tradition is typically led to magnesia particle or fine powder to improve slag corrosion resistance
And permeance property, but big problem is expanded in order to reduce reaction in-situ under high temperature and be formed produced by spinelle, by introducing SiO2
Micro mist is alleviated, SiO2Introducing can form Al in the material2O3-MgO-SiO2Etc. low melting points phase, to also reduce material
High-temperature behavior and anti-molten steel and slag corrosion performance.
Invention content
The present invention is directed to overcome prior art defect, carbon-free high-purity magnalium pressed machine brick of one kind and preparation method thereof, institute are provided
Carbon-free high-purity magnalium pressed machine brick obtained have compact structure, room temperature, in mild elevated temperature strength is high, thermal shock resistance can be good, anti-
The features such as scouring and excellent permeance property, can significantly prolong the service life as the resistance to material of ladle working lining.
To achieve the goals above, the technical solution adopted by the present invention is：
A kind of carbon-free high-purity magnalium pressed machine brick of refined steel ladles, in parts by weight, raw material includes：
It is high-purity in high-purity magnalium pressed machine brick in the present invention, on the one hand raw material used in magnalium pressed machine brick is described
Middle CaO, SiO2Etc. low melting points phase impurity component content it is very low, low-melting-point material phase will not be formed in material internal, to will not drop
The slag-resistant of low material corrodes and the performances such as infiltration.On the other hand the purity for also referring to magnalium pressed machine brick is higher, and low-melting-point material mutually contains
Amount is seldom.
In the carbon-free fine and close magnalium pressed machine brick of the present invention, using magnalium Ultramicro-powder as bonding agent, except the green compact for improving material
With outside intensity, magnalium Ultramicro-powder bonding agent will not introduce eutectic phase and toxic fugitive constituent in the material, and make in material after drying
With in the process, micro/nano level Spinel can be formed in situ in magnalium Ultramicro-powder bonding agent at a lower temperature, and it is micro- swollen to generate volume
The stomata of swollen closed material matrix makes material have excellent slag corrosion resistance and permeance property, while also having very excellent
Thermal shock resistance energy.
On the other hand, the present invention introduces metal powder additive (Al-Mg alloyed powders) in carbon-free high-purity magnalium pressed machine brick,
Al-Mg alloy powder generates moulding phase and bond strength in material matrix inner molten during mild applied at elevated temperature in, assigns material
Expect excellent high temperature intensity and thermal shock resistance energy.Al and Mg elements are co-existed in a manner of solid solution in Al-Mg alloy powder,
During materials'use, under oxidizing atmosphere, micro/nano level Spinel is generated in very low temperature, imparting material is very excellent to be resisted
Scouring and permeance property.
It is of the invention compared with Spinel is formed in situ in addition magnesia particle or fine powder in the carbon-free steel wrapping machine pressure brick of tradition
Because using magnalium Ultramicro-powder bonding agent and Al-Mg alloy powder in carbon-free high-purity magnalium pressed machine brick, it is formed by Spinel size and exists
Micro/nano level, and generation temperature is lower, generates volume microdilatancy and is filled with stomata in material matrix.Magnesium is added in traditional pressed machine brick
Sand particle and fine powder, with Al2O3Particle and fine powder, which react, to form that swell increment caused by Spinel is big, leads to the volume of product
Stability is poor, needs to introduce SiO2Mutually part eutectic is formed in material internal and carry out alleviation expansion, to reduce material
High-temperature behavior and anti-scour property.
Compressive resistance of the carbon-free high-purity magnalium pressed machine brick provided by the invention at 110 DEG C of * 3h is 120~160MPa, is resisted
Folding intensity is 20~30MPa；Through 1000 DEG C × 3h treated compressive resistances it is 80~120MPa under oxidizing atmosphere, anti-folding is strong
Degree is 15~25MPa；Through 1600 DEG C × 3h treated compressive resistances it is 90~130MPa under oxidizing atmosphere, flexural strength is
10~20MPa.Under 1450 DEG C × 1h oxidizing atmospheres, high temperature break resistant intensity is 8~12MPa.
Anti-thermal shock experiment shows：Strength retention under 1100 DEG C of water cooling conditions after thermal shock 1 time is 50~60%, thermal shock
Strength retention after 2 times is 40~50%, and the strength retention after thermal shock 3 times is 30~40%, and the intensity after thermal shock 4 times is protected
Holdup is 25~30%.
Residual line under 1600 DEG C × 3h oxidizing atmospheres is expanded to+0.20~+0.60%, from room temperature to 1500 DEG C of line
Expansion rate is 1.10~1.60%.It is in the slag penetration depth of 1600 DEG C of heat preservations 3 hours under conditions of basicity of slag is 2.0
1.5~3.5mm, slag-resistant erosion index are 6.5~9.5%, and performance is better than prior art products.
Preferably, the parts by weight group of the raw material of carbon-free high-purity magnalium pressed machine brick becomes：
Preferably, the corundum in granules uses at least one of fused white corundum or sintering plate corundum, it is described rigid
Al in beautiful particle2O3>=99.0wt%；
The corundum fine powder uses at least one of fused white corundum or sintering plate corundum, in the corundum fine powder
Al2O3>=99.0wt%.
In parts by weight, the grain size distribution of the corundum in granules is：
10~15 parts of 5~3mm；
20~35 parts of 2.999~1mm；
20~25 parts of 0.999~0.089mm；
In parts by weight, the grain size distribution of the corundum fine powder is：
10~20 parts of 0.088~0.045mm；
<5~15 parts of 0.045mm.
Preferably, the chemical composition and mass percentage of the activated alumina are Al2O3>=98.00wt%, SiO2
≤ 0.4wt%, Fe2O3≤ 0.4wt%, Na2O≤0.6wt%.
The granularity of the activated alumina fine powder is<2μm.
Preferably, the chemical composition and mass percentage of the calcined alumina micro mist are Al2O3>=98.50wt%,
SiO2≤ 0.3wt%, Fe2O3≤ 0.2wt%, Na2O≤0.4wt%.
The granularity of the calcined alumina fine powder is<4μm.
Preferably, the metal powder additive is Al-Mg alloyed powders, chemical composition and mass percentage are Al
+ Mg >=98.00wt%, and Al and Mg element wt ratios are 1:3~3:1.
The granularity of the Al-Mg alloyed powders is<0.088mm.
Preferably, the preparation method of the magnalium Ultramicro-powder bonding agent is：By light-burned MgO and ρ-Al2O3In the ball mill
Total mill is carried out to obtain.
Preferably, the light-burned MgO and ρ-Al2O3Weight ratio is 1:3~3:1.
Preferably, the rotating speed of ball mill is 100~300r/min, Ball-milling Time 1-4h.
The granularity of the magnalium Ultramicro-powder bonding agent is<0.5μm.
The chemical composition and mass percentage of the light-burned MgO be：MgO >=90.00wt%, SiO2≤ 3.00%,
Fe2O3≤ 0.60%, CaO≤2.00%, IL≤5.00%.
ρ-the Al2O3Chemical composition and mass percentage be：Al2O3>=90.00wt%, Na2O≤0.50%, IL
≤ 7.00%.
Magnalium Ultramicro-powder bonding agent of the present invention, by by light-burned MgO and ρ-Al2O3Total mill is carried out in high energy ball mill, is made
The two is uniformly mixed, and abrasive grain degree altogether<0.5μm.Light-burned MgO Ultramicro-powders used and ρ-Al2O3Ultramicro-powder is in pug mixed grind
It is reacted with water after being molded in the process with semi-finished product and is respectively formed Mg (OH)2, gibbsite and boehmite gel combination phase, assign nothing
The very high blank strength of the high-purity magnalium pressed machine brick semi-finished product of carbon.On the other hand, light-burned MgO and ρ-Al2O3In Process During High Energy Ball Milling
Two kinds of powder surfaces, which can react, generates micro/nano level Spinel nucleus, and Spinel can be greatly lowered in the formation of the nucleus
The temperature of generation.
Preferably, the water is at least one of ordinary tap water, deionized water.
The present invention also provides a kind of preparation methods of carbon-free high-purity magnalium pressed machine brick of refined steel ladles, including
Each raw material is pressed into green compact after mixing, then green compact are placed at 150~220 DEG C and toasts 6~12h and carbon-free aluminium is made
Magnesium pressed machine brick.
Each raw material itself, such as magnalium Ultramicro-powder bonding agent can be previously prepared as needed.
Compared with prior art, the invention has the advantages that：
1) by by high-purity light-burned MgO and ρ-Al2O3Total mill is carried out in high energy ball mill, and the two is made uniformly to be mixed,
And total abrasive grain degree<0.5μm.Light-burned MgO Ultramicro-powders and ρ-Al2O3Ultramicro-powder during pug mixed grind and semi-finished product molding after with
Water reaction is respectively formed Mg (OH)2, gibbsite and boehmite gel combination phase, assign carbon-free high-purity magnalium pressed machine brick semi-finished product
Very high blank strength.On the other hand, high-purity light-burned MgO and ρ-Al2O3Two kinds of powder surfaces can react in Process During High Energy Ball Milling
Micro/nano level Spinel nucleus is generated, the temperature of Spinel generation can be greatly lowered in the formation of the nucleus.
2) magnalium Ultramicro-powder bonding agent will not introduce eutectic phase and toxic fugitive constituent in the material, and in materials'use process
In, micro/nano level Spinel can be formed in situ in magnalium Ultramicro-powder bonding agent at a lower temperature, generate volume microdilatancy closing
The stomata of material matrix makes material have excellent slag corrosion resistance and permeance property.
3) present invention introduces Al-Mg alloy powder in carbon-free high-purity magnalium pressed machine brick, aluminium during mild applied at elevated temperature in
Magnesium alloy powder generates moulding phase and bond strength in material matrix inner molten, assigns material excellent high temperature intensity and thermal shock
Stable phase.Al and Mg elements are co-existed in a manner of solid solution in Al-Mg alloy powder, during materials'use under oxidizing atmosphere
Very low temperature is easy to form micro/nano level Spinel, assigns material very excellent slag corrosion resistance and permeance property.
Compared with Spinel is formed in situ in addition magnesia particle or fine powder in the carbon-free steel wrapping machine pressure brick of tradition, this project system
Because using magnalium Ultramicro-powder bonding agent and Al-Mg alloy powder in standby carbon-free fine and close magnalium machine pressure, it is formed by Spinel size
In micro/nano level, and generation temperature is lower, generates volume microdilatancy and is filled with stomata in material matrix.It is added in traditional pressed machine brick
Magnesia particle and fine powder, with Al2O3Fine powder, which reacts, to form that swell increment caused by Spinel is big, leads to the volume stability of product
Property it is poor, need introduce SiO2Mutually part eutectic is formed in material internal and carry out alleviation expansion, to reduce the high temperature of material
Performance and anti-scour property.
Specific implementation mode
The present invention is further described with reference to each embodiment and comparative example.
Examples 1 to 5
Carbon-free high-purity magnalium pressed machine brick preparation method is as follows in each embodiment：
1) by light-burned MgO and ρ-Al2O3Total mill, light-burned MgO and ρ-Al are carried out in high energy ball mill2O3Weight ratio is 2:
1, the rotating speed of ball mill is 250r/min, and Ball-milling Time is that 3h obtains magnalium Ultramicro-powder bonding agent, and granularity is<0.5μm.
Light-burned MgO chemical compositions and mass percentage are MgO >=90.00wt%, SiO2≤ 3.00%, Fe2O3≤
0.60%, CaO≤2.00%, IL (igloss)≤5.00%.
ρ-Al2O3Chemical composition and mass percentage are Al2O3>=90.00wt%, Na2O≤0.50%, IL≤
7.00%.
2) by each raw material of carbon-free high-purity magnalium pressed machine brick, such as each aggregate, fine powder, bonding agent and water is suppressed after mixing
At green compact, then green compact are placed at 200 DEG C and toasts 10h and carbon-free high-purity magnalium pressed machine brick is made.
The parts by weight of raw materials composition of Examples 1 to 5 is shown in Table 1, carbon-free high-purity magnalium machine pressure that Examples 1 to 5 prepares
Brick the performance test results are shown in Table 2.
Table 1
Corundum in granules uses fused white corundum or sintering plate corundum, Al in table 12O3>=99.0wt%.
Corundum fine powder uses fused white corundum or sintering plate corundum, Al in table 12O3>=99.0wt%.
The chemical composition of activated alumina and mass percentage are Al in table 12O3>=98.00wt%, SiO2≤
0.4wt%, Fe2O3≤ 0.4wt%, Na2O≤0.6wt%.The granularity of the activated alumina fine powder is<2μm.
The chemical composition of calcined oxide aluminium powder and mass percentage are Al in table 12O3>=98.50wt%, SiO2≤
0.3wt%, Fe2O3≤ 0.2wt%, Na2O≤0.4wt%.The granularity of the calcined oxide aluminium powder is<4μm.
Metal powder additive in table 1 is Al-Mg alloyed powders, chemical composition and mass percentage be Al+Mg >=
98.00wt%, and Al and Mg element wt ratios are 2:1.The granularity of Al-Mg alloyed powders is<0.045mm.
Water in table 1 is ordinary tap water or deionized water.
Comparative example 1
The preparation method of comparative example 1 is that various aggregates, fine powder, the bonding agent in dispensing are pressed into green compact after mixing,
Then green compact are placed at 200 DEG C and toast 10h and carbon-free corundum spinelle pressed machine brick is made, the parts by weight of raw materials group of comparative example 1
At as shown in table 1.
The chemical composition of fused magnesite used in comparative example 1 and percentage composition MgO >=97.0wt%, CaO≤
1.8wt%, SiO2≤ 0.9wt%.
The chemical composition of electric smelting spinelle used in comparative example 1 and percentage composition Al2O3For 60~80wt%, Al2O3+
MgO is >=97.0wt%.
SiO used in comparative example 12The chemical composition and percentage composition SiO of micro mist2>=96.0wt%.
MgCl used in comparative example 12It is 2.5, MgCl that solution, which adds parts by weight,2Solvent is water, MgCl in solution2Matter
It is 30% to measure percentage solubility；The addition parts by weight of dextrin used in comparative example 1 are 1.
The performance test results that each embodiment and comparative example 1 prepare product are as shown in table 2.
Table 2
As can be seen from Table 2, carbon-free high-purity magnalium pressed machine brick that prepared by the present invention, compared to traditional ladle corundum spinelle machine
Press for brick after there is room temperature and high temperature processing intensity is high, high temperature break resistant intensity is big, thermal shock resistance can it is more excellent, burn after
Affter-expansion and the advantage that high-temperature heat expansion rate is significant lower, anti-scour property is more excellent are applied to refining ladle and work
Lining can increase substantially its service life.
Disclosed above is only specific embodiments of the present invention, but the present invention is not limited to this, the technology of this field
Various changes and modifications can be made to the invention by personnel without departing from the spirit and scope of the present invention.Obviously these changes and change
Type should all belong to the present invention claims protection domain protection in.In addition, although having used some specific terms in this specification,
These terms are merely for convenience of description, is not constituted to the present invention any specifically limited.
Claims (10)
1. a kind of carbon-free high-purity magnalium pressed machine brick of refined steel ladles, which is characterized in that in parts by weight, raw material includes：
2. carbon-free high-purity magnalium pressed machine brick of refined steel ladles as described in claim 1, which is characterized in that the parts by weight of raw material
Group becomes：
3. carbon-free high-purity magnalium pressed machine brick of refined steel ladles as described in claim 1, which is characterized in that the corundum in granules
Using at least one of fused white corundum or sintering plate corundum, Al in the corundum in granules2O3>=99.0wt%；
The corundum fine powder uses at least one of fused white corundum or sintering plate corundum, Al in the corundum fine powder2O3≥
99.0wt%.
4. carbon-free high-purity magnalium pressed machine brick of refined steel ladles as described in claim 1, which is characterized in that in parts by weight,
The grain size distribution of the corundum in granules is：
10~15 parts of 5~3mm；
20~35 parts of 2.999~1mm；
20~25 parts of 0.999~0.089mm；
In parts by weight, the grain size distribution of the corundum fine powder is：
10~20 parts of 0.088~0.045mm；
<5~15 parts of 0.045mm.
5. carbon-free high-purity magnalium pressed machine brick of refined steel ladles as described in claim 1, which is characterized in that the active oxidation
The granularity of aluminium fine powder is<2μm.
6. carbon-free high-purity magnalium pressed machine brick of refined steel ladles as described in claim 1, which is characterized in that the calcined oxide
The granularity of aluminium fine powder is<4μm.
7. carbon-free high-purity magnalium pressed machine brick of refined steel ladles as described in claim 1, which is characterized in that the metal powder
Last additive is Al-Mg alloyed powders, and chemical composition and mass percentage are Al+Mg >=98.00wt%, and Al and Mg element weights
Amount is than being 1:3~3:1.
8. carbon-free high-purity magnalium pressed machine brick of refined steel ladles as described in claim 1, which is characterized in that the magnalium ultra micro
The preparation method of powder bonding agent is：By light-burned MgO and ρ-Al2O3Total mill is carried out in the ball mill to obtain.
9. carbon-free high-purity magnalium pressed machine brick of refined steel ladles as claimed in claim 8, which is characterized in that the light-burned MgO
With ρ-Al2O3Weight ratio is 1:3~3:1.
10. a kind of preparation side of such as carbon-free high-purity magnalium pressed machine brick of claim 1~9 any one of them refined steel ladles
Method, which is characterized in that including each raw material is pressed into green compact after mixing, then green compact are placed at 150~220 DEG C and are toasted
6~12h and be made carbon-free magnalium pressed machine brick.
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| CN112321282A (en) * | 2020-11-05 | 2021-02-05 | 山东瑞泰新材料科技有限公司 | High-strength magnesium oxide crucible and preparation method thereof |
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| CN112341167A (en) * | 2020-11-06 | 2021-02-09 | 浙江自立高温科技股份有限公司 | Aluminum-magnesium precast block for refined steel ladle and preparation method thereof |
| CN112341167B (en) * | 2020-11-06 | 2022-08-12 | 浙江自立高温科技股份有限公司 | Aluminum-magnesium precast block for refined steel ladle and preparation method thereof |
| CN113233906A (en) * | 2021-06-16 | 2021-08-10 | 浙江自立高温科技股份有限公司 | Magnesium-calcium gunning mix suitable for smelting clean steel and preparation method and application thereof |
| CN113233906B (en) * | 2021-06-16 | 2022-04-08 | 浙江自立高温科技股份有限公司 | Magnesium-calcium gunning mix suitable for smelting clean steel and preparation method and application thereof |
| CN114262232A (en) * | 2021-12-18 | 2022-04-01 | 河南竹林庆州耐火材料有限公司 | Preparation method of carbon-free castable added with graphite raw material for refining ladle working lining |
| CN114276126A (en) * | 2022-01-05 | 2022-04-05 | 浙江自立高温科技股份有限公司 | Carbon-free aluminum-magnesium mechanical pressed brick with excellent thermal shock resistance and erosion resistance and preparation method thereof |
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