CN115572156A - Aluminum-silicon-chromium breathable element without molten steel infiltration and preparation method thereof - Google Patents
Aluminum-silicon-chromium breathable element without molten steel infiltration and preparation method thereof Download PDFInfo
- Publication number
- CN115572156A CN115572156A CN202211197422.3A CN202211197422A CN115572156A CN 115572156 A CN115572156 A CN 115572156A CN 202211197422 A CN202211197422 A CN 202211197422A CN 115572156 A CN115572156 A CN 115572156A
- Authority
- CN
- China
- Prior art keywords
- molten steel
- chromium
- aluminum
- equal
- silicon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 47
- 239000010959 steel Substances 0.000 title claims abstract description 47
- -1 Aluminum-silicon-chromium Chemical compound 0.000 title claims abstract description 23
- 238000001764 infiltration Methods 0.000 title claims abstract description 16
- 230000008595 infiltration Effects 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 37
- 239000010431 corundum Substances 0.000 claims abstract description 37
- 239000002245 particle Substances 0.000 claims abstract description 26
- 239000000843 powder Substances 0.000 claims abstract description 22
- 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 19
- 229910052863 mullite Inorganic materials 0.000 claims abstract description 19
- 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 12
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 238000000465 moulding Methods 0.000 claims abstract description 10
- 238000003825 pressing Methods 0.000 claims abstract description 10
- 238000009423 ventilation Methods 0.000 claims abstract description 8
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000011230 binding agent Substances 0.000 claims abstract description 7
- 229910000423 chromium oxide Inorganic materials 0.000 claims abstract description 7
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 10
- 229910052596 spinel Inorganic materials 0.000 claims description 9
- 239000011029 spinel Substances 0.000 claims description 9
- 239000011651 chromium Substances 0.000 claims description 8
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 7
- 239000007767 bonding agent Substances 0.000 claims description 7
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 2
- 229920005551 calcium lignosulfonate Polymers 0.000 claims description 2
- 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 claims description 2
- RGPUVZXXZFNFBF-UHFFFAOYSA-K diphosphonooxyalumanyl dihydrogen phosphate Chemical compound [Al+3].OP(O)([O-])=O.OP(O)([O-])=O.OP(O)([O-])=O RGPUVZXXZFNFBF-UHFFFAOYSA-K 0.000 claims description 2
- 238000003754 machining Methods 0.000 claims description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 2
- 238000005245 sintering Methods 0.000 claims description 2
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 2
- 229910008458 Si—Cr Inorganic materials 0.000 claims 7
- 238000004519 manufacturing process Methods 0.000 claims 1
- 125000000914 phenoxymethylpenicillanyl group Chemical group CC1(S[C@H]2N([C@H]1C(=O)*)C([C@H]2NC(COC2=CC=CC=C2)=O)=O)C 0.000 claims 1
- 239000000377 silicon dioxide Substances 0.000 claims 1
- 238000009736 wetting Methods 0.000 claims 1
- 239000011449 brick Substances 0.000 abstract description 32
- 230000035939 shock Effects 0.000 abstract description 14
- 239000004568 cement Substances 0.000 abstract description 10
- 238000007664 blowing Methods 0.000 abstract description 5
- 239000011159 matrix material Substances 0.000 abstract description 4
- 238000002844 melting Methods 0.000 abstract description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 abstract description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052726 zirconium Inorganic materials 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 21
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 8
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 6
- 229910052804 chromium Inorganic materials 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 229910052786 argon Inorganic materials 0.000 description 4
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- ULGYAEQHFNJYML-UHFFFAOYSA-N [AlH3].[Ca] Chemical compound [AlH3].[Ca] ULGYAEQHFNJYML-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—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
- C04B35/106—Refractories from grain sized mixtures containing zirconium oxide or zircon (ZrSiO4)
-
- 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
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
- C04B2235/3222—Aluminates other than alumino-silicates, e.g. spinel (MgAl2O4)
-
- 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
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3241—Chromium oxides, chromates, 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
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3244—Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof
- C04B2235/3248—Zirconates or hafnates, e.g. zircon
-
- 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
- C04B2235/50—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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5436—Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, i.e. from 1 to 100 micron
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
- C04B2235/9676—Resistance against chemicals, e.g. against molten glass or molten salts against molten metals such as steel or aluminium
Landscapes
- 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 an aluminum-silicon-chromium breathable element without molten steel infiltration and a preparation method thereof. The aluminum-silicon-chromium breathable element comprises a plate-shaped body, is obtained by machine pressing the following raw materials in percentage by mass, and is provided with a sawtooth-shaped ventilation structure: 51-72% of complex phase corundum particles, 1-10% of zirconium corundum, 7-18% of mullite particles, 10-20% of alumina micropowder, 1-6% of chromium oxide micropowder and 1-3% of binding agent. The invention does not adopt cement, the molding mode is machine pressing molding, the fine powder part of the matrix is a relatively pure aluminum oxide unitary system, the generation of low-melting phase of the air permeable element in a high-temperature state is greatly reduced, and the air permeable element has remarkably lower porosity. The air permeable element has high strength and excellent thermal shock stability and molten steel infiltration resistance, and solves the problems that the service life is restricted by the breakage of a brick core caused by poor thermal shock stability of the traditional air permeable brick, the slit is blocked by the bottom blowing of the air permeable brick due to the easy infiltration of molten steel, and the like.
Description
Technical Field
The invention relates to the technical field of refractory materials, in particular to an aluminum-silicon-chromium breathable element without infiltration of molten steel and a preparation method thereof.
Background
Along with the development of steel products, particularly the development of low-carbon steel, ultra-low-carbon steel, various alloy steels and special steels, more severe requirements are put on ladle refining.
The air brick is a key functional refractory material for a molten steel refining bottom argon blowing process. Argon is blown into a steel ladle through the air brick to stir molten steel, so that the effects of mass transfer, heat transfer and the like are achieved, the temperature and the components of the molten steel are homogenized, and gas and non-metallic inclusions in the molten steel are removed through the principle of a bubble pump.
At present, the conventional air brick material (casting molding chromium corundum brick core) is broken due to repeated cold and hot impact in the use process, and meanwhile, the molten steel permeates into the slit to cause the phenomena of argon blowing failure and the like, so that the blowing rate of the air brick is seriously influenced, and the refining effect of the air brick is influenced.
The patent specification with the publication number of CN 112897994A discloses a preparation method of a corundum spinel complex phase material capable of being used as a basic raw material of a breathable brick, and the grain size of each raw material of the corundum spinel complex phase material is smaller than 0.2mm.
The castable material of the air brick in the prior art usually adopts cement as a bonding agent, wherein the cement contains calcium oxide and aluminum oxide, and is poured and molded after being stirred by adding water. For example, patent specification No. CN 107188576A discloses a high-strength breathable anti-quenching refractory castable, which takes mullite as one of main raw materials, and is added with corundum-zirconia bricks and CA-75 pure calcium aluminum cement.
The cement used as the binding agent of the casting material has good construction performance, and the cement combined with the chromium corundum air brick obtains excellent use effect. However, the material system generates a large amount of low-melting phase in the use process due to the introduction of calcium oxide in cement, so that the brick core is broken, the wettability of molten steel is increased, the molten steel permeates into a slit, argon blowing failure is caused, and the service life of the air brick is seriously influenced. With the improvement of the performance requirements of the air brick, the air brick material with better service life and air-blow-through rate needs to be developed.
Disclosure of Invention
In order to solve the problems that the service life of the air brick is limited by the fracture of a brick core due to poor thermal shock stability of the traditional air brick, the slit is blocked and the bottom of the air brick is blocked due to the fact that the air brick is easy to be infiltrated by molten steel, and the like, the invention provides the aluminum-silicon-chromium material which does not contain cement, the aluminum-silicon-chromium material has good thermal shock stability and molten steel infiltration resistance, and the prepared air element has good blow-through rate (can realize non-fired oxygen operation) and remarkably prolonged service life.
The specific technical scheme is as follows:
the aluminum-silicon-chromium breathable element without infiltration of molten steel comprises a plate-shaped body, is obtained by machine pressing the following raw materials in percentage by mass, and is provided with a sawtooth-shaped ventilation structure:
the granularity of the complex phase corundum particles is more than 0.088mm and less than 5mm;
the main phases in the complex phase corundum particles are 75-95 wt% of corundum phase and 5-12 wt% of aluminum-magnesium spinel phase;
the zirconia corundum is added in the form of fine powder with the granularity of less than or equal to 0.088mm, or added in the form of mixture of particles with the granularity of more than 0.088mm and less than 5mm and fine powder with the granularity of less than or equal to 0.088 mm;
the granularity of the mullite grains is more than 0.088mm and less than 5mm;
the binding agent is one or more than two of phosphoric acid, aluminum dihydrogen phosphate, PVA (polyvinyl alcohol) and calcium lignosulfonate;
the aluminum-silicon-chromium breathable component which is not infiltrated by the molten steel has the breaking strength of more than 35MPa at 1600 ℃ for 3h and the compressive strength of more than 150MPa at 1600 ℃ for 3 h.
The invention adopts specific complex phase corundum particles as aggregate, no spinel fine powder exists, the corundum phase and the aluminum-magnesium spinel phase complex phase structure in the aggregate in a specific proportion provide good strength and crack propagation resistance for the whole material, specific amount of mullite particles and zirconium corundum particles are introduced, and microcracks formed by the transformation of the acicular crystal structure of mullite and the crystal phase of zirconium corundum are utilized to provide excellent thermal shock stability for the material, thereby solving the problem of fracture of a brick core caused by cold and hot impact in the using process. In addition, cement is not used as a bonding agent, the molding mode is adjusted from conventional casting molding to machine pressing molding, the fine powder part of the matrix is relatively pure alumina, calcium oxide which is commonly used in the material of the traditional air brick is not introduced, and the generation of low-melting phase of the air element in a high-temperature state is greatly reduced. Meanwhile, the invention adopts machine pressing molding, and has obviously lower porosity compared with the traditional air brick material. The factors are coupled, so that the high strength, the excellent thermal shock stability and the molten steel resistance of the breathable element are endowed.
In a preferable example, in the aluminum-silicon-chromium breathable element which is not wetted by molten steel, the aluminum oxide content is 60wt% -90 wt%, the silicon oxide content is 1wt% -10 wt%, the chromium oxide content is 1wt% -6 wt%, and the zirconium oxide content is 1wt% -5 wt%.
In a preferred embodiment, the aluminum-silicon-chromium breathable element which is not infiltrated by the molten steel, and the Al in the complex phase corundum particles 2 O 3 The content is more than or equal to 94.0wt percent, the MgO content is less than or equal to 5wt percent, and Al 2 O 3 The content of MgO is more than or equal to 98.5wt percent.
In a preferred embodiment, the aluminum-silicon-chromium breathable element is not infiltrated by molten steel, and Al in the zirconia corundum 2 O 3 Content is more than or equal to 70.0wt%, zrO 2 The content is more than or equal to 20.0wt percent.
In a preferable example, the aluminum-silicon-chromium breathable element which is not wetted by molten steel, and the mullite grains are one or two of 70-grade pure electric mullite or sintered mullite.
In a preferred embodiment, the aluminum-silicon-chromium-based air-permeable element that does not infiltrate molten steel is formed by calcining alumina fine powder having a median particle diameter D50 of 0.5 to 1 μm, 1 to 2 μm, or 4 to 5 μm.
In a preferred embodiment, theAluminum-silicon-chromium breathable element without infiltration of molten steel, and Cr in chromium oxide micro powder 2 O 3 The content is more than or equal to 98.0wt percent, and the median particle diameter D50 is less than or equal to 10 mu m.
The preferable aluminum-silicon-chromium breathable element without infiltration of molten steel comprises a plate-shaped body, is obtained by machine pressing the following raw materials in percentage by mass, and is provided with a sawtooth-shaped ventilation structure:
the granularity of the complex phase corundum particles is more than 0.088mm and less than 5mm;
the main phases in the complex phase corundum particles are 75-95 wt% of corundum phase and 5-12 wt% of aluminum-magnesium spinel phase;
al in the complex phase corundum particles 2 O 3 The content is more than or equal to 94.0wt percent, the MgO content is less than or equal to 5wt percent, and Al 2 O 3 The content of MgO is more than or equal to 98.5wt%;
the zirconia alumina is added in the form of fine powder with the granularity less than or equal to 0.088 mm;
al in the zirconia corundum 2 O 3 Content is more than or equal to 70.0wt%, zrO 2 The content is more than or equal to 20.0wt%;
the granularity of the mullite grains is more than 0.088mm and less than 5mm;
the mullite grains are Al 2 O 3 Fused mullite with the content more than or equal to 70.0 wt%;
the alumina micro powder is active alumina micro powder with D50 of 2 mu m;
cr in the chromium oxide micro powder 2 O 3 The content is more than or equal to 98.0wt%, and the median particle diameter D50 is less than or equal to 10 mu m;
the binding agent is PVA.
The preferable aluminum-silicon-chromium breathable element without infiltration of molten steel has more excellent thermal shock stability (the water-cooling thermal shock fracture frequency is 12 times) and slag resistance, and can still maintain high mechanical strength, wherein the breaking strength at 1600 ℃ for 3h is more than 35MPa, and the compressive strength at 1600 ℃ for 3h is more than 150MPa.
The invention also provides a preparation method of the aluminum-silicon-chromium breathable element without infiltration of molten steel, which comprises the following steps: the method comprises the steps of uniformly mixing all raw materials except the bonding agent, adding the bonding agent, uniformly mixing, then adopting machine pressing for molding to prepare a breathable element body, sintering at a high temperature of more than 1600 ℃, and machining on a single surface of the breathable element body to obtain a plurality of zigzag ventilation grooves.
In a preferred embodiment, in the preparation method, the number of the zigzag ventilation grooves is 20 to 60.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention adopts specific complex phase corundum particles as aggregate, provides good strength and crack expansion resistance by a corundum phase and aluminum magnesium spinel phase complex phase structure with specific proportion, introduces specific amount of mullite particles and zirconia corundum fine powder, utilizes microcracks formed by the transformation of a needle crystal structure of mullite and a crystal phase of zirconia corundum, provides excellent thermal shock stability for materials, and solves the problem of fracture of a brick core caused by cold and hot impact in the using process. The fracture frequency of the water-cooling thermal shock is 12 times, which is obviously higher than that of the traditional cement-bonded chromium corundum air brick (the fracture frequency of the water-cooling thermal shock is 6 times).
2. The invention does not adopt cement as a bonding agent, i.e. does not introduce Al with a calcium oxide matrix fine powder part being relatively simple 2 O 3 The unary system greatly reduces the generation of low-melting phase of the breathable element in a high-temperature use state.
3. The invention adopts machine pressing molding, and has obviously lower porosity compared with the material of the traditional air brick. The porosity of the material is reduced to 14.8 percent from 18.9 percent of the traditional chrome corundum material.
The gas permeable element of the invention is endowed with high strength, excellent thermal shock stability and molten steel infiltration resistance by the coupling effect of the factors, and solves the problems that the service life is restricted by the fracture of the brick core caused by poor thermal shock stability of the traditional gas permeable brick, the slit is easy to be infiltrated by molten steel to block the bottom of the gas permeable brick and the like.
Drawings
FIG. 1 is a photograph showing the results of a molten steel infiltration resistance test (1650 ℃ C.. Times.0.5 h) for the aluminum-silicon-chromium material (a) that is not infiltrated with molten steel of example 1 and the chromium corundum material (b) that is a conventional air brick of comparative example 1.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention.
The following examples are conducted under conditions not specified, usually according to conventional conditions, or according to conditions recommended by the manufacturer.
The following examples and comparative examples are described with respect to a part of the raw materials as follows:
the main phases of the complex phase corundum particles are 75-95 wt% of corundum phase and 5-12 wt% of aluminum-magnesium spinel phase, wherein Al 2 O 3 The content is more than or equal to 94.0wt percent, the MgO content is less than or equal to 5wt percent, and Al 2 O 3 The content of MgO is more than or equal to 98.5wt%;
al in zirconia corundum 2 O 3 Content is more than or equal to 70.0wt%, zrO 2 The content is more than or equal to 20.0wt%;
the mullite grains are Al 2 O 3 The content of the fused mullite is more than or equal to 70.0 wt%;
the alumina micro powder is active alumina micro powder with D50 of 2 mu m;
cr in chromium oxide micro powder 2 O 3 The content is more than or equal to 98.0wt%, and the median particle diameter D50 is less than or equal to 10 mu m;
the binder is PVA.
Table 1 shows the raw material composition of the permeable elements of the comparative examples.
TABLE 1
Method for the preparation of the permeable elements of the comparative examples: for the raw materials in the corresponding examples in the above table 1, the particles and the matrix fine powder are first mixed uniformly, then the binder is added, after mixing uniformly, the mixture is pressed by a machine and is sintered at a high temperature of more than 1600 ℃.
The performance of the air permeable elements of the comparative examples is compared as shown in table 2 below.
TABLE 2
As can be seen from the comparison of the performances of the examples in the table 2, the aluminum-silicon-chromium breathable element which is not wetted by the molten steel has the advantages of high strength, obviously enhanced thermal shock stability and obviously enhanced slag resistance.
Fig. 1 shows the result of the molten steel infiltration resistance test (1650 ℃ x 0.5 h), and the aluminum-silicon-chromium material of the invention has significantly less molten steel penetration depth compared with the traditional cement-bonded chromium corundum material under the same gap width.
Furthermore, it should be understood that various changes or modifications can be made by those skilled in the art after reading the above description of the present invention, and equivalents also fall within the scope of the invention defined by the appended claims.
Claims (9)
1. The aluminum-silicon-chromium breathable element which is not infiltrated by molten steel is characterized by comprising a plate-shaped body, and is obtained by machine pressing the following raw materials in percentage by mass, and a sawtooth-shaped ventilation structure is arranged:
the granularity of the complex phase corundum particles is more than 0.088mm and less than 5mm;
the main phases in the complex phase corundum particles are 75-95 wt% of corundum phase and 5-12 wt% of aluminum-magnesium spinel phase;
the zirconia corundum is added in the form of fine powder with the granularity of less than or equal to 0.088mm, or added in the form of mixture of particles with the granularity of more than 0.088mm and less than 5mm and fine powder with the granularity of less than or equal to 0.088 mm;
the granularity of the mullite grains is more than 0.088mm and less than 5mm;
the binding agent is one or more than two of phosphoric acid, aluminum dihydrogen phosphate, PVA and calcium lignosulfonate;
the aluminum-silicon-chromium breathable component which is not infiltrated by the molten steel has the breaking strength of more than 35MPa at 1600 ℃ for 3h and the compressive strength of more than 150MPa at 1600 ℃ for 3 h.
2. The molten steel non-infiltrating Al-Si-Cr permeable element according to claim 1, wherein the molten steel non-infiltrating Al-Si-Cr permeable element contains 60-90 wt% of alumina, 1-10 wt% of silica, 1-6 wt% of chromium oxide, and 1-5 wt% of zirconium oxide.
3. The Al-Si-Cr gas permeable member not infiltrated by molten steel of claim 1, wherein Al is in said complex phase corundum particles 2 O 3 The content is more than or equal to 94.0wt percent, the MgO content is less than or equal to 5wt percent, and Al 2 O 3 The content of MgO is more than or equal to 98.5wt percent.
4. The Al-Si-Cr gas permeable member not infiltrated by molten steel of claim 1, wherein Al is contained in the zirconia alumina 2 O 3 Content is more than or equal to 70.0wt%, zrO 2 The content is more than or equal to 20.0wt percent.
5. The aluminum-silicon-chromium-based breathable element without infiltration of molten steel of claim 1, wherein the mullite grains are one or both of 70-grade high-purity mullite or sintered mullite.
6. The Al-Si-Cr gas permeable element not infiltrated by molten steel according to claim 1, wherein said fine alumina powder is one or more kinds of calcined fine alumina powders having a median particle diameter D50 of 0.5 to 1 μm, 1 to 2 μm, and 4 to 5 μm.
7. The Al-Si-Cr gas permeation structure of claim 1, which is non-wetting to molten steelThe element is characterized in that Cr in the chromium oxide micro powder 2 O 3 The content is more than or equal to 98.0wt percent, and the median particle diameter D50 is less than or equal to 10 mu m.
8. The method for manufacturing an Al-Si-Cr gas permeable member that is not wetted by molten steel according to any one of claims 1 to 7, comprising: the method comprises the steps of uniformly mixing all raw materials except the bonding agent, adding the bonding agent, uniformly mixing, then adopting machine pressing for molding to prepare a breathable element body, sintering at a high temperature of more than 1600 ℃, and machining on a single surface of the breathable element body to obtain a plurality of zigzag ventilation grooves.
9. The method as set forth in claim 8, wherein the number of the zigzag ventilation grooves is 20 to 60.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211197422.3A CN115572156A (en) | 2022-09-29 | 2022-09-29 | Aluminum-silicon-chromium breathable element without molten steel infiltration and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211197422.3A CN115572156A (en) | 2022-09-29 | 2022-09-29 | Aluminum-silicon-chromium breathable element without molten steel infiltration and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115572156A true CN115572156A (en) | 2023-01-06 |
Family
ID=84582354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211197422.3A Pending CN115572156A (en) | 2022-09-29 | 2022-09-29 | Aluminum-silicon-chromium breathable element without molten steel infiltration and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115572156A (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001059114A (en) * | 1999-08-18 | 2001-03-06 | Kurosaki Harima Corp | Porous plug |
| US6352951B1 (en) * | 1997-07-01 | 2002-03-05 | Didier-Werke Ag | Refractory material based on chromium corundum, a chromium corundum brick and the use of said brick |
| CN1515372A (en) * | 2003-01-07 | 2004-07-28 | 武汉科技大学 | Preparation method of Al2O3-MgO-ZrO2 ladle air plug |
| CN1970502A (en) * | 2006-12-08 | 2007-05-30 | 鞍山市耘路耐火材料厂 | Argon-blowing narrow brick |
| CN104211420A (en) * | 2014-09-15 | 2014-12-17 | 武汉科技大学 | Light-weight aluminum-magnesium casting material and preparation method thereof |
| CN105645979A (en) * | 2016-01-15 | 2016-06-08 | 浙江自立高温科技有限公司 | Steel ladle air brick and manufacturing method thereof |
| CN106747365A (en) * | 2017-01-17 | 2017-05-31 | 重庆钢铁集团矿业有限公司冶金材料厂 | The low high-strength zirconia-chromia corundum brick of stomata and its manufacture method |
| CN107285787A (en) * | 2017-07-28 | 2017-10-24 | 武汉科技大学 | A kind of lightweight corundum fireproof magnesia alumina spinel material and preparation method thereof |
| CN107311679A (en) * | 2017-07-28 | 2017-11-03 | 武汉科技大学 | A kind of lightweight corundum magnesium aluminum spinel pouring material and preparation method thereof |
| CN108083782A (en) * | 2017-11-22 | 2018-05-29 | 武汉钢铁集团耐火材料有限责任公司 | Ladle integral pouring working lining castable |
| WO2018126937A1 (en) * | 2017-01-09 | 2018-07-12 | 武汉科技大学 | Dispersion-type corundum-spinel air-permeable brick and preparation method therefor |
| CN110746180A (en) * | 2019-11-25 | 2020-02-04 | 浙江自立高温科技股份有限公司 | Sintered aluminum-chromium-zirconium sliding plate brick for copper smelting anode furnace and preparation method thereof |
| CN112897994A (en) * | 2019-11-19 | 2021-06-04 | 江苏晶鑫新材料股份有限公司 | Preparation method of corundum spinel complex phase material |
-
2022
- 2022-09-29 CN CN202211197422.3A patent/CN115572156A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6352951B1 (en) * | 1997-07-01 | 2002-03-05 | Didier-Werke Ag | Refractory material based on chromium corundum, a chromium corundum brick and the use of said brick |
| JP2001059114A (en) * | 1999-08-18 | 2001-03-06 | Kurosaki Harima Corp | Porous plug |
| CN1515372A (en) * | 2003-01-07 | 2004-07-28 | 武汉科技大学 | Preparation method of Al2O3-MgO-ZrO2 ladle air plug |
| CN1970502A (en) * | 2006-12-08 | 2007-05-30 | 鞍山市耘路耐火材料厂 | Argon-blowing narrow brick |
| CN104211420A (en) * | 2014-09-15 | 2014-12-17 | 武汉科技大学 | Light-weight aluminum-magnesium casting material and preparation method thereof |
| CN105645979A (en) * | 2016-01-15 | 2016-06-08 | 浙江自立高温科技有限公司 | Steel ladle air brick and manufacturing method thereof |
| WO2018126937A1 (en) * | 2017-01-09 | 2018-07-12 | 武汉科技大学 | Dispersion-type corundum-spinel air-permeable brick and preparation method therefor |
| CN106747365A (en) * | 2017-01-17 | 2017-05-31 | 重庆钢铁集团矿业有限公司冶金材料厂 | The low high-strength zirconia-chromia corundum brick of stomata and its manufacture method |
| CN107311679A (en) * | 2017-07-28 | 2017-11-03 | 武汉科技大学 | A kind of lightweight corundum magnesium aluminum spinel pouring material and preparation method thereof |
| CN107285787A (en) * | 2017-07-28 | 2017-10-24 | 武汉科技大学 | A kind of lightweight corundum fireproof magnesia alumina spinel material and preparation method thereof |
| CN108083782A (en) * | 2017-11-22 | 2018-05-29 | 武汉钢铁集团耐火材料有限责任公司 | Ladle integral pouring working lining castable |
| CN112897994A (en) * | 2019-11-19 | 2021-06-04 | 江苏晶鑫新材料股份有限公司 | Preparation method of corundum spinel complex phase material |
| CN110746180A (en) * | 2019-11-25 | 2020-02-04 | 浙江自立高温科技股份有限公司 | Sintered aluminum-chromium-zirconium sliding plate brick for copper smelting anode furnace and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 徐平坤, 中国建材工业出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107746258B (en) | Ultralow-linear-change baking-free air brick and preparation method and application thereof | |
| CN100462327C (en) | Method for preparing electro-fused magnesia alumina spinel | |
| CN108610027B (en) | High-performance cement-bonded castable and preparation method thereof | |
| EP1612196B1 (en) | Unshaped refractories | |
| CN111704474A (en) | Mullite refractory castable for ultrahigh-temperature smelting | |
| EP4349797A1 (en) | Ca6-based refractory material with medium volume density, preparation method therefor, and use thereof | |
| US6548435B1 (en) | Basic free-flowing casting material and preforms produced thereform | |
| CN114538921A (en) | Glass-combined large-size zirconia compact sintered product | |
| CN111957951B (en) | Preparation method and application of modified aluminum powder for refractory castable | |
| CN112745134A (en) | Air brick containing corundum ceramic balls and preparation method thereof | |
| CN112194495A (en) | Steel ladle wall integral castable | |
| CN115572156A (en) | Aluminum-silicon-chromium breathable element without molten steel infiltration and preparation method thereof | |
| CN114873996B (en) | Slag-corrosion-resistant ladle castable and preparation method thereof | |
| CN114380577B (en) | Low-silicon tundish dry material for high-quality steel | |
| JP2001302364A (en) | Alumina-magnesia-based castable refractory containing zirconium oxide and molten metal vessel for metal refining | |
| CN112321281B (en) | Composite brick cup and preparation process thereof | |
| CA1331631C (en) | Rebonded fused brick | |
| JPH06345550A (en) | Castable refractory | |
| CN111777409A (en) | Brick for molten iron ladle with high slag corrosion resistance and preparation method thereof | |
| CN111111320A (en) | Magnesium oxide-based filter with multi-pore structure and preparation method thereof | |
| CN115745579B (en) | Composite air brick with high strength and low heat conductivity coefficient and preparation method thereof | |
| CN116199504B (en) | Refractory castable capable of being baked quickly and preparation method thereof | |
| JP4588239B2 (en) | Alumina cement, alumina cement composition, and amorphous refractory using the same | |
| JP3027721B2 (en) | Porous plug refractory and manufacturing method thereof | |
| JP2007099562A (en) | Air permeable refractory and method of producing the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20230106 |