CN106336231A - Fireproof working lining used for steel refining and preparing method thereof - Google Patents
Fireproof working lining used for steel refining and preparing method thereof Download PDFInfo
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- CN106336231A CN106336231A CN201610745114.8A CN201610745114A CN106336231A CN 106336231 A CN106336231 A CN 106336231A CN 201610745114 A CN201610745114 A CN 201610745114A CN 106336231 A CN106336231 A CN 106336231A
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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
- C04B35/01—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/02—Linings
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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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
- C04B41/5031—Alumina
- C04B41/5032—Aluminates
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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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/87—Ceramics
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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
- C04B2235/02—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
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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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- 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
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- Structural Engineering (AREA)
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- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Ceramic Products (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention relates to a fireproof working lining used for steel refining and a preparing method thereof. The technical scheme is characterized by comprising the steps of using 75-85wt% micropore corundum particles, 5-10w% corundum fine powder, 5-10wt% a-Al2O3 micro powder and 3-10wt% magnesium oxide as raw materials, adding polycarboxylic acid water reducing agent which accounts for 0.08-0.15wt% of the raw materials, and mixing evenly; adding water which accounts for 4-8wt% of the raw materials, stirring, moulding by casting, maintaining for 12-48h under room temperature condition, demoulding, drying for 12-36h at a temperature of 110-200 DEG C to obtain a parent material; covering a layer of coating containing calcium aluminate with a thickness of 3-10mm on the surface of the parent material to obtain an integrally fireproof working lining, roasting the fireproof working lining for 2-12h under condition of 800-1200 DEG C to obtain the fireproof working lining used for steel refining. The fireproof working lining used for steel refining has the advantages of low thermal conductivity, good thermal shock resistance, small pollution to steel liquid and strong anti-erosion ability to medium like steel slag and good applicability.
Description
Technical field
The invention belongs to overall fire resisting working lining technical field.Specifically related to a kind of steel refining with overall fire resisting working lining and
Its preparation method.
Background technology
With the development of external refining and continuous casting technology, ladle is gradually changed by the splendid attire steel in water container of original single function
For the outer liquid steel refining equipment of the complicated stove of function.In order to meet actual production requirement, the commonly used aluminum of current lining material in the ladle
Magnesium/spinel carbon brick, magnalium/spinel carbon brick and magnesia carbon brick.Though had substantially excellent as inner lining material using these refractory materials
Point, but also have and know defect altogether: on the one hand to molten steel recarburization effect substantially, it is unfavorable for the production of ultra-low-carbon steel and mild steel；Another
Aspect, pyroconductivity is higher, and liquid steel temperature declines comparatively fast, is unfavorable for that continuous casting is smoothed out, and not only increases energy consumption, also
Increase the pollution to environment.Fine and close magnalium/spinelle, magnalium/spinel equally exist that energy consumption is big, under liquid steel temperature
The problems such as drop fast.
With economic growing and social progress, energy-saving and emission-reduction become focus of concern.Tradition is heat-insulated resistance to
The insulation effect of fiery material is excellent, but corrosion resistance, intensity and wearability are all poor, generally can not be directly used as work surface,
But as heat-insulation layer or permanent layer.In fact, fireclay insulating refractory is the closer to work surface, its heat-insulating and energy-saving effect is better.
With the raising to energy-saving and emission-reduction requirement, for the high intensity that directly can use in work surface, high temperature resistant, erosion-resistant heat-insulated resistance to
The developmental research of fiery material is increasingly subject to people's attention.Work lining refractories lightweight using porous aggregate is to solve
One important research direction of the problems referred to above.First, due in light weight refractory material, there is more pore, in jump in temperature
Thermal stress can effectively be accommodated, lift material Spalling resistance energy；Second, when light weight aggregate apparent porosity is relatively low, closed pore
Rate is high, average pore size hour, and light weight refractory material slag resistance can significantly reduce, it could even be possible to lifting material slag resistance.
However, current smelting condition is more and more harsher, steel grade and slag system are changeable, lead to the lightweight working lining based on porous aggregate resistance to
The diversity of fiery material slag resistance is larger, the safe and stable operation of impact hot industry.
Content of the invention
It is contemplated that overcome prior art defect it is therefore an objective to provide that a kind of thermal conductivity is low, good thermal shock stability, to molten steel
Pollute the steel refinings that erosion medium resistance ability is strong and adaptability is good such as little, anti-slag overall fire resisting working lining and preparation method thereof.
For realizing above-mentioned task, the technical solution adopted in the present invention is: with the micropore corundum in granules of 75 ~ 85wt%, 5 ~
The corundum fine powder of 10wt%, the α-al of 5 ~ 10wt%2o3The fine magnesium oxide micro-powder of micropowder and 3 ~ 10wt% is raw material, additional described raw material
The polycarboxylate water-reducer of 0.08 ~ 0.15wt%, mix homogeneously.The water of additional described raw material 4 ~ 8wt% again, stirring, moulding by casting, room
Maintenance 12 ~ 48 hours under the conditions of temperature, the demoulding, it is dried 12 ~ 36 hours under the conditions of 110 ~ 200 DEG C, obtain fertile material.Then exist
Described fertile material surface-coated a layer thickness is the calcium paint containing aluminic acid of 3 ~ 10mm, obtains overall fire resisting working lining base, by institute
State overall fire resisting working lining base to toast 2 ~ 12 hours under the conditions of 800 ~ 1200 DEG C, prepared steel refining entirety fire resisting working lining.
The described preparation method containing aluminic acid calcium paint is: with the α-al of a calcium aluminate micropowder of 94 ~ 98wt%, 1 ~ 4wt%2o3
The Calcium dialuminate micropowder of micropowder and 1 ~ 4wt% is compound, the polyhydric alcohol of additional compound 5 ~ 20wt% and the wood of 0.1 ~ 0.3wt%
Quality sulfoacid calcium, mix and blend, obtain final product calcium paint containing aluminic acid.
Described micropore corundum in granules: al2o3Content > 99wt%；Bulk density < 3.30g/cm3, particle diameter is 20～0.088mm；
Average pore size is 0.2 ~ 1.0 μm.
The al of described corundum fine powder2o3Content>99wt%,<88 μm of particle diameter.
Described α-al2o3The al of micropowder2o3Content > 99wt%, particle diameter d50<5μm.
The mgo content of described fine magnesium oxide micro-powder > 98wt%, particle diameter d50<6μm.
The caal of a described calcium aluminate micropowder2o4Content > 94wt%, particle diameter d50<25μm.
The particle diameter d of described Calcium dialuminate micropowder50<10μm.
Described polyhydric alcohol be ethylene glycol, Sorbitol, the tert-butyl alcohol more than one.
Due to adopting technique scheme, the present invention compared with prior art has a following good effect:
(1) one layer of calcium paint containing aluminic acid of present invention coating forms high gluing under high temperature between alumina ceramic crucible and molten steel
Degree solid-liquid mixed phase, because the presence of the capillary force of porous fertile material is so as to become stable buffering barrier layer, smelts just
Phase can effectively prevent the infiltration of slag.
(2) one layer of calcium paint containing aluminic acid of present invention coating is combined with alumina ceramic crucible reaction in-situ, absorbs simultaneously
The impurity such as the alumina inclusion in molten steel, the calcium aluminate in dope layer containing calcium aluminate is progressively changed into Calcium dialuminate up to six aluminum
Sour calcium high-melting-point sealing coat, makes al2o3Dissolving from being directly changed into indirectly spreading, slow down molten steel infiltration corrode, moreover it is possible to
Enough effective cleaning molten steels.
The overall fire resisting working lining of steel refining prepared by the present invention is after testing: after 1100 DEG C of water-cooleds five times, rupture strength is protected
Holdup is 31 ~ 43%；1500 DEG C of Static crucible method anti-slag experiment erosion index are 5 ~ 20%, and penetration index is 28 ~ 45%；It is applied to
200t refining ladle, its skin temperature averagely reduces by more than 10%, and nonmetallic inclusionsin steel content reduces 12 ~ 20%.
Therefore, the steel refining entirety fire resisting working lining prepared by the present invention have that thermal conductivity is low, good thermal shock stability, right
Molten steel pollutes the features that erosion medium resistance ability is strong and adaptability is good such as little, anti-slag.
Specific embodiment
With reference to specific embodiment, the invention will be further described, not the restriction to its protection domain.
For avoiding repeating, first will be as follows for the raw material Unify legislation involved by this specific embodiment, no longer superfluous in embodiment
State:
Described micropore corundum in granules: al2o3Content > 99wt%；Bulk density < 3.30g/cm3, particle diameter is 20～0.088mm；Averagely
Aperture is 0.2 ~ 1.0 μm.
The al of described corundum fine powder2o3Content>99wt%,<88 μm of particle diameter.
Described α-al2o3The al of micropowder2o3Content > 99wt%, particle diameter d50<5μm.
The mgo content of described fine magnesium oxide micro-powder > 98wt%, particle diameter d50<6μm.
The caal of a described calcium aluminate micropowder2o4Content > 94wt%, particle diameter d50<25μm.
The particle diameter d of described Calcium dialuminate micropowder50<10μm.
Embodiment 1
A kind of steel refining overall fire resisting working lining and preparation method thereof.Described in the present embodiment, preparation method is:
With the micropore corundum in granules of 75 ~ 79wt%, the corundum fine powder of 7 ~ 10wt%, 7 ~ 10wt% α-al2o3Micropowder and 6 ~ 10wt%
Fine magnesium oxide micro-powder be raw material, the polycarboxylate water-reducer of additional described raw material 0.08 ~ 0.15wt%, mix homogeneously.Additional described again
The water of raw material 4 ~ 8wt%, stirring, moulding by casting, maintenance 12 ~ 48 hours under room temperature condition, the demoulding, dry under the conditions of 110 ~ 200 DEG C
Dry 12 ~ 36 hours, obtain fertile material.Then described fertile material surface-coated a layer thickness be 3 ~ 10mm containing calcium aluminate
Coating, obtains overall fire resisting working lining base, described overall fire resisting working lining base is toasted 2 ~ 12 under the conditions of 800 ~ 1200 DEG C little
When, prepared steel refining entirety fire resisting working lining.
The described preparation method containing aluminic acid calcium paint is: with the α-al of a calcium aluminate micropowder of 94 ~ 96wt%, 2 ~ 4wt%2o3
The Calcium dialuminate micropowder of micropowder and 2 ~ 4wt% is compound, the polyhydric alcohol of additional compound 5 ~ 15wt% and the wood of 0.1 ~ 0.3wt%
Quality sulfoacid calcium, mix and blend, obtain final product calcium paint containing aluminic acid.
Described polyhydric alcohol is ethylene glycol.
The overall fire resisting working lining of steel refining prepared by the present embodiment is after testing: rupture strength after 1100 DEG C of water-cooleds five times
Conservation rate is 31 ~ 34%；1500 DEG C of Static crucible method anti-slag experiment erosion index are 16 ~ 20%, and penetration index is 37 ~ 45%；Application
In 200t refining ladle, its skin temperature averagely reduces by more than 10%, and nonmetallic inclusionsin steel content reduces 12 ~ 15%.
Embodiment 2
A kind of steel refining overall fire resisting working lining and preparation method thereof.The present embodiment removes the preparation method containing aluminic acid calcium paint
Outward, remaining is with embodiment 1.
The described preparation method containing aluminic acid calcium paint is: with the α-al of a calcium aluminate micropowder of 96 ~ 98wt%, 1 ~ 2wt%2o3
The Calcium dialuminate micropowder of micropowder and 1 ~ 2wt% is compound, the polyhydric alcohol of additional compound 10 ~ 20wt% and the wood of 0.1 ~ 0.3wt%
Quality sulfoacid calcium, mix and blend, obtain final product calcium paint containing aluminic acid.
Described polyhydric alcohol is Sorbitol.
The overall fire resisting working lining of steel refining prepared by the present embodiment is after testing: rupture strength after 1100 DEG C of water-cooleds five times
Conservation rate is 32 ~ 35%；1500 DEG C of Static crucible method anti-slag experiment erosion index are 17 ~ 20%, and penetration index is 35 ~ 43%；Application
In 200t refining ladle, its skin temperature averagely reduces by more than 10%, and nonmetallic inclusionsin steel content reduces 12 ~ 15%.
Embodiment 3
A kind of steel refining overall fire resisting working lining and preparation method thereof.Described in the present embodiment, preparation method is:
With the micropore corundum in granules of 78 ~ 81wt%, the corundum fine powder of 7 ~ 10wt%, 5 ~ 8wt% α-al2o3Micropowder and 6 ~ 10wt%'s
Fine magnesium oxide micro-powder is raw material, the polycarboxylate water-reducer of additional described raw material 0.08 ~ 0.15wt%, mix homogeneously.Additional described former again
The water of material 4 ~ 8wt%, stirring, moulding by casting, maintenance 12 ~ 48 hours under room temperature condition, the demoulding, it is dried under the conditions of 110 ~ 200 DEG C
12 ~ 36 hours, obtain fertile material.Then the applying containing calcium aluminate for 3 ~ 10mm in described fertile material surface-coated a layer thickness
Material, obtains overall fire resisting working lining base, described overall fire resisting working lining base is toasted 2 ~ 12 hours under the conditions of 800 ~ 1200 DEG C,
Prepared steel refining entirety fire resisting working lining.
The described preparation method containing aluminic acid calcium paint is: with the α-al of a calcium aluminate micropowder of 94 ~ 96wt%, 2 ~ 4wt%2o3
The Calcium dialuminate micropowder of micropowder and 2 ~ 4wt% is compound, the polyhydric alcohol of additional compound 5 ~ 15wt% and the wood of 0.1 ~ 0.3wt%
Quality sulfoacid calcium, mix and blend, obtain final product calcium paint containing aluminic acid.
Described polyhydric alcohol is the tert-butyl alcohol.
The overall fire resisting working lining of steel refining prepared by the present embodiment is after testing: rupture strength after 1100 DEG C of water-cooleds five times
Conservation rate is 33 ~ 37%；1500 DEG C of Static crucible method anti-slag experiment erosion index are 10 ~ 17%, and penetration index is 31 ~ 40%；Application
In 200t refining ladle, its skin temperature averagely reduces by more than 12%, and nonmetallic inclusionsin steel content reduces 13 ~ 16%.
Embodiment 4
A kind of steel refining overall fire resisting working lining and preparation method thereof.The present embodiment removes the preparation method containing aluminic acid calcium paint
Outward, remaining is with embodiment 3.
The described preparation method containing aluminic acid calcium paint is: with the α-al of a calcium aluminate micropowder of 96 ~ 98wt%, 1 ~ 2wt%2o3
The Calcium dialuminate micropowder of micropowder and 1 ~ 2wt% is compound, the polyhydric alcohol of additional compound 10 ~ 20wt% and the wood of 0.1 ~ 0.3wt%
Quality sulfoacid calcium, mix and blend, obtain final product calcium paint containing aluminic acid.
Described polyhydric alcohol is the mixture of ethylene glycol and Sorbitol.
The overall fire resisting working lining of steel refining prepared by the present embodiment is after testing: rupture strength after 1100 DEG C of water-cooleds five times
Conservation rate is 33 ~ 37%；1500 DEG C of Static crucible method anti-slag experiment erosion index are 9 ~ 16%, and penetration index is 33 ~ 41%；Application
In 200t refining ladle, its skin temperature averagely reduces by more than 11%, and nonmetallic inclusionsin steel content reduces 13 ~ 17%.
Embodiment 5
A kind of steel refining overall fire resisting working lining and preparation method thereof.Described in the present embodiment, preparation method is:
With the micropore corundum in granules of 80 ~ 83wt%, the corundum fine powder of 5 ~ 8wt%, 7 ~ 10wt% α-al2o3Micropowder and 3 ~ 7wt%'s
Fine magnesium oxide micro-powder is raw material, the polycarboxylate water-reducer of additional described raw material 0.08 ~ 0.15wt%, mix homogeneously.Additional described former again
The water of material 4 ~ 8wt%, stirring, moulding by casting, maintenance 12 ~ 48 hours under room temperature condition, the demoulding, it is dried under the conditions of 110 ~ 200 DEG C
12 ~ 36 hours, obtain fertile material.Then the applying containing calcium aluminate for 3 ~ 10mm in described fertile material surface-coated a layer thickness
Material, obtains overall fire resisting working lining base, described overall fire resisting working lining base is toasted 2 ~ 12 hours under the conditions of 800 ~ 1200 DEG C,
Prepared steel refining entirety fire resisting working lining.
The described preparation method containing aluminic acid calcium paint is: with the α-al of a calcium aluminate micropowder of 94 ~ 96wt%, 2 ~ 4wt%2o3
The Calcium dialuminate micropowder of micropowder and 2 ~ 4wt% is compound, the polyhydric alcohol of additional compound 5 ~ 15wt% and the wood of 0.1 ~ 0.3wt%
Quality sulfoacid calcium, mix and blend, obtain final product calcium paint containing aluminic acid.
Described polyhydric alcohol is the mixture of ethylene glycol and the tert-butyl alcohol.
The overall fire resisting working lining of steel refining prepared by the present embodiment is after testing: rupture strength after 1100 DEG C of water-cooleds five times
Conservation rate is 35 ~ 39%；1500 DEG C of Static crucible method anti-slag experiment erosion index are 7 ~ 13%, and penetration index is 29 ~ 34%；Application
In 200t refining ladle, its skin temperature averagely reduces by more than 12%, and nonmetallic inclusionsin steel content reduces 14 ~ 17%.
Embodiment 6
A kind of steel refining overall fire resisting working lining and preparation method thereof.The present embodiment removes the preparation method containing aluminic acid calcium paint
Outward, remaining is with embodiment 5.
The described preparation method containing aluminic acid calcium paint is: with the α-al of a calcium aluminate micropowder of 96 ~ 98wt%, 1 ~ 2wt%2o3
The Calcium dialuminate micropowder of micropowder and 1 ~ 2wt% is compound, the polyhydric alcohol of additional compound 10 ~ 20wt% and the wood of 0.1 ~ 0.3wt%
Quality sulfoacid calcium, mix and blend, obtain final product calcium paint containing aluminic acid.
Described polyhydric alcohol is Sorbitol and the tert-butyl alcohol.
The overall fire resisting working lining of steel refining prepared by the present embodiment is after testing: rupture strength after 1100 DEG C of water-cooleds five times
Conservation rate is 31 ~ 43%；1500 DEG C of Static crucible method anti-slag experiment erosion index are 5 ~ 20%, and penetration index is 32 ~ 36%；Application
In 200t refining ladle, its skin temperature averagely reduces by more than 12%, and nonmetallic inclusionsin steel content reduces 15 ~ 18%.
Embodiment 7
A kind of steel refining overall fire resisting working lining and preparation method thereof.Described in the present embodiment, preparation method is:
With the micropore corundum in granules of 82 ~ 85wt%, the corundum fine powder of 5 ~ 8wt%, 5 ~ 8wt% α-al2o3Micropowder and the oxygen of 3 ~ 7wt%
Change magnesium micropowder is raw material, the polycarboxylate water-reducer of additional described raw material 0.08 ~ 0.15wt%, mix homogeneously.Additional described raw material again
The water of 4 ~ 8wt%, stirring, moulding by casting, maintenance 12 ~ 48 hours under room temperature condition, the demoulding, it is dried 12 under the conditions of 110 ~ 200 DEG C
~ 36 hours, obtain fertile material.Then the applying containing calcium aluminate for 3 ~ 10mm in described fertile material surface-coated a layer thickness
Material, obtains overall fire resisting working lining base, described overall fire resisting working lining base is toasted 2 ~ 12 hours under the conditions of 800 ~ 1200 DEG C,
Prepared steel refining entirety fire resisting working lining.
The described preparation method containing aluminic acid calcium paint is: with the α-al of a calcium aluminate micropowder of 94 ~ 96wt%, 2 ~ 4wt%2o3
The Calcium dialuminate micropowder of micropowder and 2 ~ 4wt% is compound, the polyhydric alcohol of additional compound 5 ~ 15wt% and the wood of 0.1 ~ 0.3wt%
Quality sulfoacid calcium, mix and blend, obtain final product calcium paint containing aluminic acid.
Described polyhydric alcohol is the mixture of ethylene glycol, Sorbitol and the tert-butyl alcohol.
The overall fire resisting working lining of steel refining prepared by the present embodiment is after testing: rupture strength after 1100 DEG C of water-cooleds five times
Conservation rate is 38 ~ 42%；1500 DEG C of Static crucible method anti-slag experiment erosion index are 5 ~ 10%, and penetration index is 28 ~ 30%；Application
In 200t refining ladle, its skin temperature averagely reduces by more than 14%, and nonmetallic inclusionsin steel content reduces 15 ~ 20%.
Embodiment 8
A kind of steel refining overall fire resisting working lining and preparation method thereof.The present embodiment removes the preparation method containing aluminic acid calcium paint
Outward, remaining is with embodiment 7.
The described preparation method containing aluminic acid calcium paint is: with the α-al of a calcium aluminate micropowder of 96 ~ 98wt%, 1 ~ 2wt%2o3
The Calcium dialuminate micropowder of micropowder and 1 ~ 2wt% is compound, the polyhydric alcohol of additional compound 10 ~ 20wt% and the wood of 0.1 ~ 0.3wt%
Quality sulfoacid calcium, mix and blend, obtain final product calcium paint containing aluminic acid.
Described polyhydric alcohol is the mixture of ethylene glycol, Sorbitol and the tert-butyl alcohol.
The overall fire resisting working lining of steel refining prepared by the present embodiment is after testing: rupture strength after 1100 DEG C of water-cooleds five times
Conservation rate is 38 ~ 43%；1500 DEG C of Static crucible method anti-slag experiment erosion index are 5 ~ 11%, and penetration index is 28 ~ 31%；Application
In 200t refining ladle, its skin temperature averagely reduces by more than 13%, and nonmetallic inclusionsin steel content reduces 16 ~ 20%.
This specific embodiment compared with prior art has a following good effect:
(1) this specific embodiment coating one layer of calcium paint containing aluminic acid under high temperature between alumina ceramic crucible and molten steel
Form high viscosity solid-liquid mixed phase, the presence due to the capillary force of porous fertile material intercepts so as to become stable buffering
Layer, the smelting initial stage can effectively prevent the infiltration of slag.
(2) one layer of calcium paint containing aluminic acid of this specific embodiment coating is combined with alumina ceramic crucible reaction in-situ,
The impurity such as alumina inclusion in absorption molten steel simultaneously, the calcium aluminate in dope layer containing calcium aluminate is progressively changed into Calcium dialuminate
Until calcium hexaluminate high-melting-point sealing coat, make al2o3Dissolving from being directly changed into indirectly spreading, slow down molten steel infiltration corrode, this
Outer additionally it is possible to effective cleaning molten steel.
Steel refining entirety fire resisting working lining prepared by this specific embodiment is after testing: resists after 1100 DEG C of water-cooleds five times
Folding strength retention is 31 ~ 43%；1500 DEG C of Static crucible method anti-slags experiment erosion index are 5 ~ 20%, penetration index is 28 ~
45%；It is applied to 200t refining ladle, its skin temperature averagely reduces by more than 10%, and nonmetallic inclusionsin steel content reduces 12
~20%.
Therefore, the steel refining entirety fire resisting working lining prepared by this specific embodiment has that thermal conductivity is low, thermal shock is steady
Qualitative good, molten steel is polluted with the erosion medium resistance ability such as little, anti-slag is strong and adaptability is good feature.
Claims (9)
1. a kind of steel refining with the preparation method of overall fire resisting working lining it is characterised in that micropore corundum with 75 ~ 85wt%
Grain, the α-al of the corundum fine powder of 5 ~ 10wt%, 5 ~ 10wt%2o3The fine magnesium oxide micro-powder of micropowder and 3 ~ 10wt% is raw material, additional described
The polycarboxylate water-reducer of raw material 0.08 ~ 0.15wt%, mix homogeneously；The water of additional described raw material 4 ~ 8wt% again, stirring, pour into
Type, maintenance 12 ~ 48 hours under room temperature condition, the demoulding, it is dried 12 ~ 36 hours under the conditions of 110 ~ 200 DEG C, obtain fertile material；
Then the calcium paint containing aluminic acid for 3 ~ 10mm in described fertile material surface-coated a layer thickness, obtains overall fire resisting working lining
Base, described overall fire resisting working lining base is toasted 2 ~ 12 hours under the conditions of 800 ~ 1200 DEG C, the entirety fire resisting of prepared steel refining
Working lining；
The described preparation method containing aluminic acid calcium paint is: with the α-al of a calcium aluminate micropowder of 94 ~ 98wt%, 1 ~ 4wt%2o3Micropowder
Calcium dialuminate micropowder with 1 ~ 4wt% is compound, the polyhydric alcohol of additional compound 5 ~ 20wt% and the lignin of 0.1 ~ 0.3wt%
Sulfoacid calcium, mix and blend, obtain final product calcium paint containing aluminic acid.
2. steel refining according to claim 1 with the preparation method of overall fire resisting working lining it is characterised in that described micropore
Corundum in granules: al2o3Content > 99wt%；Bulk density < 3.30g/cm3, particle diameter is 20～0.088mm；Average pore size be 0.2 ~
1.0μm.
3. steel refining according to claim 1 with the preparation method of overall fire resisting working lining it is characterised in that described corundum
The al of fine powder2o3Content>99wt%,<88 μm of particle diameter.
4. steel refining according to claim 1 with the preparation method of overall fire resisting working lining it is characterised in that described α-
al2o3The al of micropowder2o3Content > 99wt%, particle diameter d50<5μm.
5. steel refining according to claim 1 with the preparation method of overall fire resisting working lining it is characterised in that described oxidation
The mgo content of magnesium micropowder > 98wt%, particle diameter d50<6μm.
6. steel refining according to claim l with the preparation method of overall fire resisting working lining it is characterised in that a described aluminum
The caal of sour calcium micropowder2o4Content > 94wt%, particle diameter d50<25μm.
7. steel refining according to claim l with the preparation method of overall fire resisting working lining it is characterised in that described two aluminum
The particle diameter d of sour calcium micropowder50<10μm.
8. steel refining according to claim l with the preparation method of overall fire resisting working lining it is characterised in that described polynary
Alcohol be ethylene glycol, Sorbitol, the tert-butyl alcohol more than one.
9. a kind of steel refining entirety fire resisting working lining is it is characterised in that described steel refining entirety fire resisting working lining is according to power
Profit requires the steel refining prepared by preparation method of the overall fire resisting working lining of steel refining any one of 1～8 with whole
Body fire resisting working lining.
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| CN108558377A (en) * | 2018-06-25 | 2018-09-21 | 武汉科技大学 | A kind of high nitrogen steel smelting pouring materialfor steel ladle and preparation method thereof |
| CN110317069A (en) * | 2018-03-28 | 2019-10-11 | 宝山钢铁股份有限公司 | A kind of coating material and coating method for blast branch pipe of blast furnace liner |
| CN113149621A (en) * | 2021-05-28 | 2021-07-23 | 武汉科技大学 | Energy-saving ladle working lining castable and preparation method thereof |
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| CN114044690A (en) * | 2021-12-17 | 2022-02-15 | 江苏鑫烻高温新材料科技有限公司 | Steel ladle air brick and preparation method thereof |
| CN114736007A (en) * | 2022-02-23 | 2022-07-12 | 上海利尔耐火材料有限公司 | Low-heat-conductivity high-performance aluminum-magnesia-carbon molten pool brick and preparation method thereof |
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