CN106336231B - A kind of steel refining whole fire resisting working lining and preparation method thereof - Google Patents
A kind of steel refining whole fire resisting working lining and preparation method thereof Download PDFInfo
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- CN106336231B CN106336231B CN201610745114.8A CN201610745114A CN106336231B CN 106336231 B CN106336231 B CN 106336231B CN 201610745114 A CN201610745114 A CN 201610745114A CN 106336231 B CN106336231 B CN 106336231B
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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
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- 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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- 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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- 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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- 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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- 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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- 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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Abstract
The present invention relates to a kind of steel refining whole fire resisting working linings and preparation method thereof.Its technical solution is: with the micropore corundum in granules of 75 ~ 85wt%, the corundum fine powder of 5 ~ 10wt%, 5 ~ 10wt% α-Al2O3The fine magnesium oxide micro-powder of micro mist and 3 ~ 10wt% are raw material, and the polycarboxylate water-reducer of the additional 0.08 ~ 0.15wt% of raw material is uniformly mixed；The water of the additional 4 ~ 8wt% of raw material again, stirring, moulding by casting conserve 12 ~ 48 hours under room temperature, and demoulding is 12 ~ 36 hours dry under the conditions of 110 ~ 200 DEG C, obtain fertile material；Then the calcium paint containing aluminic acid that a layer thickness is 3 ~ 10mm is coated on fertile material surface, obtains whole fire resisting working lining base, whole fire resisting working lining base is toasted 2 ~ 12 hours under the conditions of 800 ~ 1200 DEG C, steel refining is made with whole fire resisting working lining.The made product of the present invention has the characteristics that low thermal conductivity, good thermal shock stability, pollutes that the erosion medium resistances abilities such as small, anti-steel slag are strong and adaptability is good to molten steel.
Description
Technical field
The invention belongs to whole fire resisting working lining technical fields.More particularly to a kind of whole fire resisting working lining of steel refining and
Preparation method.
Background technique
With the development of external refining and continuous casting technology, ladle is gradually changed by the splendid attire steel in water container having a single function originally
For liquid steel refining equipment outside the furnace of function complexity.In order to meet actual production requirement, lining material in the ladle generallys use aluminium at present
Magnesium/spinel carbon brick, magnalium/spinel carbon brick and magnesia carbon brick.Though being had using these refractory materials as inner lining material obvious excellent
Point, but also have and know defect altogether: on the one hand molten steel recarburization is acted on obviously, is unfavorable for the production of ultra-low-carbon steel and mild steel；It is another
Aspect, pyroconductivity is higher, and liquid steel temperature decline is very fast, is unfavorable for continuous casting and goes on smoothly, and not only increase energy consumption, also
Increase the pollution to environment.Fine and close magnalium/spinelle, magnalium/spinel equally exist that energy consumption is high, under liquid steel temperature
The problems such as fast, drops.
With economic increasingly developed and social progress, energy-saving and emission-reduction become focus concerned by people.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 working face,
But as insulating layer or permanent layer.In fact, fireclay insulating refractory, closer to working face, its heat-insulating and energy-saving effect is better.
With the raising to energy-saving and emission-reduction requirement, for can be in high intensity that working face directly uses, high temperature resistant, erosion-resistant heat-insulated resistance to
The developmental research of fiery material is increasingly valued by people.Work lining refractories lightweight using porous aggregate is to solve
One important research direction of the above problem.First, due to having more stomata in light weight refractory material, in jump in temperature
Thermal stress can be effectively accommodated, material Spalling resistance energy is promoted；Second, when light weight aggregate apparent porosity is lower, closed pore
Rate height, average pore size hour, light weight refractory material slag resistance can significantly reduce, it could even be possible to promoting material slag resistance.
However, current smelting condition is more and more harsher, steel grade and slag system are changeable, cause the lightweight working lining based on porous aggregate resistance to
The otherness of fiery material slag resistance is larger, influences the safe and stable operation of hot industry.
Summary of the invention
The present invention is directed to overcome prior art defect, it is therefore an objective to provide a kind of low thermal conductivity, good thermal shock stability, to molten steel
Pollute the steel refining that erosion medium resistances ability is strong and adaptability is good such as small, anti-steel slag whole fire resisting working lining and preparation method thereof.
To realize above-mentioned task, the technical scheme adopted by the invention is that: with the micropore corundum in granules of 75 ~ 85wt%, 5 ~
α-the Al of the corundum fine powder of 10wt%, 5 ~ 10wt%2O3The fine magnesium oxide micro-powder of micro mist and 3 ~ 10wt% are raw material, the additional raw material
The polycarboxylate water-reducer of 0.08 ~ 0.15wt% is uniformly mixed.The water of the additional 4 ~ 8wt% of raw material again, stirring, moulding by casting, room
It conserves 12 ~ 48 hours, demoulds under the conditions of temperature, it is 12 ~ 36 hours dry under the conditions of 110 ~ 200 DEG C, obtain fertile material.Then exist
The fertile material surface coats the calcium paint containing aluminic acid that a layer thickness is 3 ~ 10mm, whole fire resisting working lining base is obtained, by institute
It states whole fire resisting working lining base to toast 2 ~ 12 hours under the conditions of 800 ~ 1200 DEG C, steel refining is made with whole fire resisting working lining.
The preparation method of the calcium paint containing aluminic acid is: with a calcium aluminate micro mist of 94 ~ 98wt%, the α-Al of 1 ~ 4wt%2O3
The Calcium dialuminate micro mist of micro mist and 1 ~ 4wt% are mixture, the polyalcohol of additional 5 ~ 20wt% of mixture and the wood of 0.1 ~ 0.3wt%
Quality sulfoacid calcium is mixed to get calcium paint containing aluminic acid.
The micropore corundum in granules: Al2O3Content > 99wt%；Bulk density < 3.30g/cm3, partial size is 20~0.088mm；
Average pore size is 0.2 ~ 1.0 μm.
The Al of the corundum fine powder2O3Content>99wt%, partial size<88 μm.
α-the Al2O3The Al of micro mist2O3Content > 99wt%, partial size D50 <5μm。
Content of MgO > 98wt% of the fine magnesium oxide micro-powder, partial size D50 <6μm。
The CaAl of the one calcium aluminate micro mist2O4Content > 94wt%, partial size D50 <25μm。
The partial size D of the Calcium dialuminate micro mist50 <10μm。
The polyalcohol be ethylene glycol, sorbierite, the tert-butyl alcohol more than one.
Due to the adoption of the above technical scheme, the present invention has following good effect compared with prior art:
(1) one layer of calcium paint containing aluminic acid that the present invention coats is formed between alumina ceramic crucible and molten steel under high temperature
High viscosity solid-liquid mixed phase becomes stable buffering barrier layer, smelting due to the presence of the capillary force of porous fertile material
Refining initial stage can effectively prevent the infiltration of steel slag.
(2) one layer of calcium paint containing aluminic acid that the present invention coats absorbs simultaneously in conjunction with alumina ceramic crucible reaction in-situ
The impurity such as the alumina inclusion in molten steel, the calcium aluminate in dope layer containing calcium aluminate is gradually changed into Calcium dialuminate until six aluminium
Sour calcium high-melting-point separation layer, makes Al2O3Dissolution spread indirectly from directly becoming, slow down molten steel infiltration corrode, moreover it is possible to
Enough effective cleaning molten steels.
The whole fire resisting work laying-in detection of steel refining prepared by the present invention: 1100 DEG C of flexural strengths after water cooling five times are 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, skin temperature averagely reduce by 10% or more, and nonmetallic inclusionsin steel content reduces 12 ~ 20%.
Therefore, the whole fire resisting working lining of the steel refining prepared by the present invention has low thermal conductivity, good thermal shock stability, right
Molten steel pollutes the feature that erosion medium resistances ability is strong and adaptability is good such as small, anti-steel slag.
Specific embodiment
The invention will be further described With reference to embodiment, not to the limitation of its protection scope.
It is first that raw material Unify legislation involved in present embodiment is as follows to avoid repeating, it is no longer superfluous in embodiment
It states:
The micropore corundum in granules: Al2O3Content > 99wt%；Bulk density < 3.30g/cm3, partial size is 20~0.088mm；
Average pore size is 0.2 ~ 1.0 μm.
The Al of the corundum fine powder2O3Content>99wt%, partial size<88 μm.
α-the Al2O3The Al of micro mist2O3Content > 99wt%, partial size D50 <5μm。
Content of MgO > 98wt% of the fine magnesium oxide micro-powder, partial size D50 <6μm。
The CaAl of the one calcium aluminate micro mist2O4Content > 94wt%, partial size D50 <25μm。
The partial size D of the Calcium dialuminate micro mist50 <10μm。
Embodiment 1
A kind of steel refining whole fire resisting working lining and preparation method thereof.Preparation method described in the present embodiment is:
With the micropore corundum in granules of 75 ~ 79wt%, the corundum fine powder of 7 ~ 10wt%, 7 ~ 10wt% α-Al2O3Micro mist and 6 ~
The fine magnesium oxide micro-powder of 10wt% is raw material, and the polycarboxylate water-reducer of the additional 0.08 ~ 0.15wt% of raw material is uniformly mixed.It is outer again
Add the water of the 4 ~ 8wt% of raw material, stir, moulding by casting, conserves 12 ~ 48 hours under room temperature, demoulding, in 110 ~ 200 DEG C of items
It is 12 ~ 36 hours dry under part, obtain fertile material.Then coating a layer thickness on the fertile material surface is containing for 3 ~ 10mm
Aluminic acid calcium paint obtains whole fire resisting working lining base, and the whole fire resisting working lining base is toasted 2 under the conditions of 800 ~ 1200 DEG C
~ 12 hours, steel refining is made with whole fire resisting working lining.
The preparation method of the calcium paint containing aluminic acid is: with a calcium aluminate micro mist of 94 ~ 96wt%, the α-Al of 2 ~ 4wt%2O3
The Calcium dialuminate micro mist of micro mist and 2 ~ 4wt% are mixture, the polyalcohol of additional 5 ~ 15wt% of mixture and the wood of 0.1 ~ 0.3wt%
Quality sulfoacid calcium is mixed to get calcium paint containing aluminic acid.
The polyalcohol is ethylene glycol.
The whole fire resisting work laying-in detection of steel refining prepared by the present embodiment: 1100 DEG C of flexural strengths after water cooling 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%；Using
In 200t refining ladle, skin temperature averagely reduces by 10% or more, and nonmetallic inclusionsin steel content reduces 12 ~ 15%.
Embodiment 2
A kind of steel refining whole fire resisting working lining and preparation method thereof.The present embodiment removes the preparation side of the calcium paint containing aluminic acid
Outside method, remaining is the same as embodiment 1.
The preparation method of the calcium paint containing aluminic acid is: with a calcium aluminate micro mist of 96 ~ 98wt%, the α-Al of 1 ~ 2wt%2O3
The Calcium dialuminate micro mist of micro mist and 1 ~ 2wt% are mixture, the polyalcohol of additional 10 ~ 20wt% of mixture and the wood of 0.1 ~ 0.3wt%
Quality sulfoacid calcium is mixed to get calcium paint containing aluminic acid.
The polyalcohol is sorbierite.
The whole fire resisting work laying-in detection of steel refining prepared by the present embodiment: 1100 DEG C of flexural strengths after water cooling 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%；Using
In 200t refining ladle, skin temperature averagely reduces by 10% or more, and nonmetallic inclusionsin steel content reduces 12 ~ 15%.
Embodiment 3
A kind of steel refining whole fire resisting working lining and preparation method thereof.Preparation method described in the present embodiment is:
With the micropore corundum in granules of 78 ~ 81wt%, the corundum fine powder of 7 ~ 10wt%, 5 ~ 8wt% α-Al2O3Micro mist and 6 ~
The fine magnesium oxide micro-powder of 10wt% is raw material, and the polycarboxylate water-reducer of the additional 0.08 ~ 0.15wt% of raw material is uniformly mixed.It is outer again
Add the water of the 4 ~ 8wt% of raw material, stir, moulding by casting, conserves 12 ~ 48 hours under room temperature, demoulding, in 110 ~ 200 DEG C of items
It is 12 ~ 36 hours dry under part, obtain fertile material.Then coating a layer thickness on the fertile material surface is containing for 3 ~ 10mm
Aluminic acid calcium paint obtains whole fire resisting working lining base, and the whole fire resisting working lining base is toasted 2 under the conditions of 800 ~ 1200 DEG C
~ 12 hours, steel refining is made with whole fire resisting working lining.
The preparation method of the calcium paint containing aluminic acid is: with a calcium aluminate micro mist of 94 ~ 96wt%, the α-Al of 2 ~ 4wt%2O3
The Calcium dialuminate micro mist of micro mist and 2 ~ 4wt% are mixture, the polyalcohol of additional 5 ~ 15wt% of mixture and the wood of 0.1 ~ 0.3wt%
Quality sulfoacid calcium is mixed to get calcium paint containing aluminic acid.
The polyalcohol is the tert-butyl alcohol.
The whole fire resisting work laying-in detection of steel refining prepared by the present embodiment: 1100 DEG C of flexural strengths after water cooling 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%；Using
In 200t refining ladle, skin temperature averagely reduces by 12% or more, and nonmetallic inclusionsin steel content reduces 13 ~ 16%.
Embodiment 4
A kind of steel refining whole fire resisting working lining and preparation method thereof.The present embodiment removes the preparation side of the calcium paint containing aluminic acid
Outside method, remaining is the same as embodiment 3.
The preparation method of the calcium paint containing aluminic acid is: with a calcium aluminate micro mist of 96 ~ 98wt%, the α-Al of 1 ~ 2wt%2O3
The Calcium dialuminate micro mist of micro mist and 1 ~ 2wt% are mixture, the polyalcohol of additional 10 ~ 20wt% of mixture and the wood of 0.1 ~ 0.3wt%
Quality sulfoacid calcium is mixed to get calcium paint containing aluminic acid.
The polyalcohol is the mixture of ethylene glycol and sorbierite.
The whole fire resisting work laying-in detection of steel refining prepared by the present embodiment: 1100 DEG C of flexural strengths after water cooling 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%；Using
In 200t refining ladle, skin temperature averagely reduces by 11% or more, and nonmetallic inclusionsin steel content reduces 13 ~ 17%.
Embodiment 5
A kind of steel refining whole fire resisting working lining and preparation method thereof.Preparation method described in the present embodiment is:
With the micropore corundum in granules of 80 ~ 83wt%, the corundum fine powder of 5 ~ 8wt%, 7 ~ 10wt% α-Al2O3Micro mist and 3 ~ 7wt%
Fine magnesium oxide micro-powder be raw material, the polycarboxylate water-reducer of the additional 0.08 ~ 0.15wt% of raw material, be uniformly mixed.It is additional described again
The water of 4 ~ 8wt% of raw material, stirring, moulding by casting conserve 12 ~ 48 hours under room temperature, and demoulding is done under the conditions of 110 ~ 200 DEG C
Dry 12 ~ 36 hours, obtain fertile material.Then coating a layer thickness on the fertile material surface is 3 ~ 10mm containing calcium aluminate
Coating obtains whole fire resisting working lining base, and it is small that the whole fire resisting working lining base is toasted 2 ~ 12 under the conditions of 800 ~ 1200 DEG C
When, steel refining is made with whole fire resisting working lining.
The preparation method of the calcium paint containing aluminic acid is: with a calcium aluminate micro mist of 94 ~ 96wt%, the α-Al of 2 ~ 4wt%2O3
The Calcium dialuminate micro mist of micro mist and 2 ~ 4wt% are mixture, the polyalcohol of additional 5 ~ 15wt% of mixture and the wood of 0.1 ~ 0.3wt%
Quality sulfoacid calcium is mixed to get calcium paint containing aluminic acid.
The polyalcohol is the mixture of ethylene glycol and the tert-butyl alcohol.
The whole fire resisting work laying-in detection of steel refining prepared by the present embodiment: 1100 DEG C of flexural strengths after water cooling 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%；Using
In 200t refining ladle, skin temperature averagely reduces by 12% or more, and nonmetallic inclusionsin steel content reduces 14 ~ 17%.
Embodiment 6
A kind of steel refining whole fire resisting working lining and preparation method thereof.The present embodiment removes the preparation side of the calcium paint containing aluminic acid
Outside method, remaining is the same as embodiment 5.
The preparation method of the calcium paint containing aluminic acid is: with a calcium aluminate micro mist of 96 ~ 98wt%, the α-Al of 1 ~ 2wt%2O3
The Calcium dialuminate micro mist of micro mist and 1 ~ 2wt% are mixture, the polyalcohol of additional 10 ~ 20wt% of mixture and the wood of 0.1 ~ 0.3wt%
Quality sulfoacid calcium is mixed to get calcium paint containing aluminic acid.
The polyalcohol is sorbierite and the tert-butyl alcohol.
The whole fire resisting work laying-in detection of steel refining prepared by the present embodiment: 1100 DEG C of flexural strengths after water cooling 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%；Using
In 200t refining ladle, skin temperature averagely reduces by 12% or more, and nonmetallic inclusionsin steel content reduces 15 ~ 18%.
Embodiment 7
A kind of steel refining whole fire resisting working lining and preparation method thereof.Preparation method described in the present embodiment is:
With the micropore corundum in granules of 82 ~ 85wt%, the corundum fine powder of 5 ~ 8wt%, 5 ~ 8wt% α-Al2O3Micro mist and 3 ~ 7wt%
Fine magnesium oxide micro-powder be raw material, the polycarboxylate water-reducer of the additional 0.08 ~ 0.15wt% of raw material, be uniformly mixed.It is additional described again
The water of 4 ~ 8wt% of raw material, stirring, moulding by casting conserve 12 ~ 48 hours under room temperature, and demoulding is done under the conditions of 110 ~ 200 DEG C
Dry 12 ~ 36 hours, obtain fertile material.Then coating a layer thickness on the fertile material surface is 3 ~ 10mm containing calcium aluminate
Coating obtains whole fire resisting working lining base, and it is small that the whole fire resisting working lining base is toasted 2 ~ 12 under the conditions of 800 ~ 1200 DEG C
When, steel refining is made with whole fire resisting working lining.
The preparation method of the calcium paint containing aluminic acid is: with a calcium aluminate micro mist of 94 ~ 96wt%, the α-Al of 2 ~ 4wt%2O3
The Calcium dialuminate micro mist of micro mist and 2 ~ 4wt% are mixture, the polyalcohol of additional 5 ~ 15wt% of mixture and the wood of 0.1 ~ 0.3wt%
Quality sulfoacid calcium is mixed to get calcium paint containing aluminic acid.
The polyalcohol is the mixture of ethylene glycol, sorbierite and the tert-butyl alcohol.
The whole fire resisting work laying-in detection of steel refining prepared by the present embodiment: 1100 DEG C of flexural strengths after water cooling 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%；Using
In 200t refining ladle, skin temperature averagely reduces by 14% or more, and nonmetallic inclusionsin steel content reduces 15 ~ 20%.
Embodiment 8
A kind of steel refining whole fire resisting working lining and preparation method thereof.The present embodiment removes the preparation side of the calcium paint containing aluminic acid
Outside method, remaining is the same as embodiment 7.
The preparation method of the calcium paint containing aluminic acid is: with a calcium aluminate micro mist of 96 ~ 98wt%, the α-Al of 1 ~ 2wt%2O3
The Calcium dialuminate micro mist of micro mist and 1 ~ 2wt% are mixture, the polyalcohol of additional 10 ~ 20wt% of mixture and the wood of 0.1 ~ 0.3wt%
Quality sulfoacid calcium is mixed to get calcium paint containing aluminic acid.
The polyalcohol is the mixture of ethylene glycol, sorbierite and the tert-butyl alcohol.
The whole fire resisting work laying-in detection of steel refining prepared by the present embodiment: 1100 DEG C of flexural strengths after water cooling 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%；Using
In 200t refining ladle, skin temperature averagely reduces by 13% or more, and nonmetallic inclusionsin steel content reduces 16 ~ 20%.
Present embodiment has following good effect compared with prior art:
(1) one layer of calcium paint containing aluminic acid of present embodiment coating is under high temperature in alumina ceramic crucible and molten steel
Between form high viscosity solid-liquid mixed phase stable buffering become due to the presence of the capillary force of porous fertile material
Barrier layer, smelting initial stage can effectively prevent the infiltration of steel slag.
(2) present embodiment coating one layer of calcium paint containing aluminic acid in conjunction with alumina ceramic crucible reaction in-situ,
The impurity such as the alumina inclusion in molten steel are absorbed simultaneously, and the calcium aluminate in dope layer containing calcium aluminate is gradually changed into Calcium dialuminate
Until calcium hexaluminate high-melting-point separation layer, makes Al2O3Dissolution spread indirectly from directly becoming, slow down molten steel infiltration corrode, this
Outside, additionally it is possible to effective cleaning molten steel.
The whole fire resisting work laying-in detection of steel refining prepared by present embodiment: 1100 DEG C resist after water cooling five times
Rolling over 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%；Applied to 200t refining ladle, skin temperature averagely reduces by 10% or more, and nonmetallic inclusionsin steel content reduces 12
~20%。
Therefore, steel refining prepared by present embodiment is low with thermal conductivity with whole fire resisting working lining, thermal shock is steady
It is qualitative it is good, pollute that the erosion medium resistances abilities such as small, anti-steel slag are strong to molten steel and the characteristics of adaptability is good.
Claims (8)
1. a kind of steel refining preparation method of whole fire resisting working lining, it is characterised in that with the micropore corundum of 75~85wt%
α-the Al of grain, the corundum fine powder of 5~10wt%, 5~10wt%2O3The fine magnesium oxide micro-powder of micro mist and 3~10wt% are raw material, outside
Add the polycarboxylate water-reducer of the 0.08~0.15wt% of raw material, is uniformly mixed；The water of the additional 4~8wt% of raw material again, is stirred
It mixes, moulding by casting, conserves 12~48 hours under room temperature, demoulding is 12~36 hours dry under the conditions of 110~200 DEG C, obtains
To fertile material；Then the calcium paint containing aluminic acid that a layer thickness is 3~10mm is coated on the fertile material surface, obtains entirety
The whole fire resisting working lining base is toasted 2~12 hours under the conditions of 800~1200 DEG C, steel essence is made by fire resisting working lining base
The whole fire resisting working lining of refining；
The preparation method of the calcium paint containing aluminic acid is: with a calcium aluminate micro mist of 94~98wt%, the α-Al of 1~4wt%2O3
The Calcium dialuminate micro mist of micro mist and 1~4wt% are mixture, the polyalcohol of additional 5~20wt% of mixture and 0.1~
The calcium lignosulfonate of 0.3wt% is mixed to get calcium paint containing aluminic acid；
The micropore corundum in granules: Al2O3Content > 99wt%；Bulk density < 3.30g/cm3, partial size is 20~0.088mm；It is flat
Equal aperture is 0.2~1.0 μm.
2. the steel refining according to claim 1 preparation method of whole fire resisting working lining, it is characterised in that the corundum
The Al of fine powder2O3Content>99wt%, partial size<88 μm.
3. the steel refining according to claim 1 preparation method of whole fire resisting working lining, it is characterised in that the α-
Al2O3The Al of micro mist2O3Content > 99wt%, partial size D50<5μm。
4. the steel refining according to claim 1 preparation method of whole fire resisting working lining, it is characterised in that the oxidation
Content of MgO > 98wt% of magnesium micro mist, partial size D50<6μm。
5. according to the preparation method of whole fire resisting working lining of steel refining described in claim l, it is characterised in that an aluminium
The CaAl of sour calcium micro mist2O4Content > 94wt%, partial size D50<25μm。
6. according to the preparation method of whole fire resisting working lining of steel refining described in claim l, it is characterised in that two aluminium
The partial size D of sour calcium micro mist50<10μm。
7. according to the preparation method of whole fire resisting working lining of steel refining described in claim l, it is characterised in that described polynary
Alcohol be ethylene glycol, sorbierite, the tert-butyl alcohol more than one.
8. a kind of whole fire resisting working lining of steel refining, it is characterised in that the steel refining is according to power with whole fire resisting working lining
Benefit require any one of 1~7 described in steel refining prepared by preparation method of the steel refining with whole fire resisting working lining with whole
Body fire resisting working lining.
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