CN105060908B - A kind of ladle corundum spinel castable and preparation method thereof - Google Patents
A kind of ladle corundum spinel castable and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of ladle corundum spinel castable and preparation method thereof.Its technical scheme is：The organic fiber of additional 0.02 ~ 0.15 part of quality, the calcium lignosulfonate of 0.04 ~ 0.08 part of quality, the sodium tripolyphosphate of 0.08 ~ 0.12 part of quality, the aluminium powder of the calgon of 0.03 ~ 0.06 part of quality and 0.01 ~ 0.03 part of quality, are mixed in the substrate material of 20~40 parts of quality；The corundum in granules containing magnesium of 60~80 parts of quality is added, dry-mixed, then the water of additional 4 ~ 6 parts of quality is stirred, installation mold, pour into a mould vibration moulding, 12 ~ 48 hours are incubated under the conditions of 110 ~ 200 DEG C, the demoulding produces ladle corundum spinel castable.The composition of the substrate material is：Particle diameter D50Respectively 5 μm, 3 μm and 1 μm of α Al2O3Micro mist；Fused white corundum fine powder；Fused magnesite fine powder；Alumina gel powder.Castable prepared by the present invention has that volume stability is good, intensity is high, thermal shock resistance is strong and the characteristics of excellent resistance to slag corrosion.
Description
Technical field
The invention belongs to corundum-spinel castable technical field.Specifically related to a kind of ladle is poured into a mould with corundum-spinel
Material and preparation method thereof.
Background technology
With the development of modern steel industry, the smelting condition of ladle is increasingly harsh, refractory material used by ladle liner
Use condition is also increasingly harsher, and the castable of traditional material can not meet the demand of technological progress.So, develop new
The high-performance steel ladle casting material of type is imperative.Corundum-spinel castable is the new varieties grown up in recent years, due to
Its good high-temperature behavior is widely used, and is successively popularized in states such as Japan.With the technological progress and refining of refractory material
The raising that steel technique is required refractory material, corundum-spinel castable has been used for the harsh position of use condition in ladle,
Bottom impact zone, RH pipes, air brick system are such as wrapped, practical application shows that it has good performance and high service life.
Compared to the refractory material of other materials, corundum-spinel castable turns into the ladle liner material of current main flow
Material, but from the point of view of the practical situations of steel mill, still suffer from following defect.First, Al in use2O3And MgO reactions
Though the spinelle of generation can improve the slag resistance of refractory material, it can be difficult to being evenly distributed, cause lining material in the ladle local
It is impaired serious；Secondly, bring larger permanent line to expand in in-situ preparation spinelle course of reaction, cause lining material in the ladle
Antistrip performance declines, and inner lining material seriously ftractures in the middle and later periods, causes large area to be peeled off.
The content of the invention
It is contemplated that overcoming prior art defect, it is therefore an objective to provide that a kind of volume stability is good, intensity is high, thermal shock is stable
Property excellent ladle corundum-spinel castable of strong, resistance to slag corrosion and preparation method thereof.
To realize above-mentioned task, the technical solution adopted in the present invention is：It is additional in the substrate material of 20~40 parts of quality
The organic fiber of 0.02 ~ 0.15 part of quality, the calcium lignosulfonate of 0.04 ~ 0.08 part of quality, the trimerization of 0.08 ~ 0.12 part of quality
The aluminium powder of sodium phosphate, the calgon of 0.03 ~ 0.06 part of quality and 0.01 ~ 0.03 part of quality, mixes, obtains compound；Again
The aggregate of 60~80 parts of quality is added into compound, dry-mixed, then the water of additional 4 ~ 6 parts of quality is stirred, installation mold,
Vibration moulding is poured into a mould, 12 ~ 48 hours are incubated under the conditions of 110 ~ 200 DEG C, the demoulding produces ladle corundum-spinel castable.
The percentage composition that the composition of the substrate material and each composition account for substrate material is：Fused white corundum fine powder accounts for 30 ~
48wt%, fused magnesite fine powder accounts for 3 ~ 8wt%, particle diameter D50For 5 μm of α-Al2O3Micro mist accounts for 5 ~ 15wt%, particle diameter D50For 3 μm of α-
Al2O3Micro mist accounts for 5 ~ 15wt%, particle diameter D50For 1 μm of α-Al2O3Micro mist accounts for 5 ~ 15wt%, and alumina gel powder accounts for 12 ~ 20wt%.
The aggregate is corundum in granules containing magnesium, and the content of MgO of the corundum in granules containing magnesium is 1 ~ 3wt%；The corundum in granules containing magnesium
Grain composition be：Wherein particle diameter accounts for 0 ~ 5wt% for 25mm ~ 15mm, particle diameter be less than or equal to 10mm and more than 5mm account for 30 ~
35wt%, particle diameter is less than or equal to 5mm and accounts for 20 ~ 25wt% more than 3mm, and particle diameter is less than or equal to 3mm and accounts for 15 more than 1mm
~ 20wt%, particle diameter is less than or equal to 1mm and accounts for 20 ~ 25wt% more than 0.088mm.
The Al of described fused white corundum fine powder2O3Content>99wt%, particle diameter<0.088mm.
The content of MgO of the fused magnesite fine powder>97wt%, particle diameter<0.088mm.
α-the Al2O3The Al of micro mist2O3Content>99wt%.
The Al of the alumina gel powder2O3Content is 60~80wt%, particle diameter<1um.
Wooden cellulose content≤55% of the calcium lignosulfonate, pH value is 4.5 ~ 6.5, water part≤9%.
The Al content of the aluminium powder>99wt%, particle diameter<0.088mm.
Due to using above-mentioned technical proposal, the present invention has following good effect compared with prior art：
（1）MgO to be introduced in the form of corundum containing magnesium, on the one hand can be reduced in-situ preparation spinelle course of reaction by the present invention
In bring permanent line expansion, on the other hand, being avoided that causes spinelle skewness because of in situ spinel
Situation, therefore improve the volume stability and resistance to slag corrosion of material.
（2）Present invention introduces corundum in granules containing magnesium, high-temperature lower part point magnesia is solidly soluted into corundum, and activated alumina is brilliant
Lattice, in use aluminum oxide can more absorb calcium oxide, magnesium aluminate spinel can be in balanced solid solution slag longer
Mn, Fe component, so as to reduce viscosity coefficient of dross, slow down its speed for corroding infiltration.
（3）α-the Al that the present invention is arranged in pairs or groups using three-level particle diameter2O3Micro mist, can realize that gradient reaction in-situ is generated in substrate material
Spinelle, its size distribution is suitable, it is ensured that matrix close mode.
（4）Ladle prepared by the present invention with corundum spinel castable after testing：The anti-folding of normal temperature after 1500 DEG C × 3h burnings
Intensity is 15 ~ 22MPa, and compressive resistance is 90 ~ 110MPa；Rupture strength conservation rate is 21 ~ 27% after 1100 DEG C of water-cooleds five times；
1500 DEG C of Static crucible method anti-slag experiment erosion index are 10 ~ 15%, and penetration index is 31 ~ 36%.
Therefore, the ladle corundum-spinel castable for preparing of the present invention has that volume stability is good, intensity is high, heat resistanceheat resistant
The characteristics of pinking is by force and resistance to slag corrosion is excellent.
Embodiment
With reference to embodiment, the invention will be further described, not to the limitation of its protection domain.
To avoid repeating, by the technical parameter Unify legislation of the raw material involved by present embodiment and additive such as first
Under, repeated no more in embodiment：
The Al of the fused white corundum fine powder2O3Content>99wt%, particle diameter<0.088mm.
The content of MgO of the fused magnesite fine powder>97wt%, particle diameter<0.088mm.
α-the Al2O3The Al of micro mist2O3Content>99wt%.
The Al of the alumina gel powder2O3Content is 60~80wt%, particle diameter<1um.
Wooden cellulose content≤55% of the calcium lignosulfonate, pH value is 4.5 ~ 6.5, water part≤9%.
The Al content of described aluminium powder>99wt%, particle diameter<0.088mm.
Embodiment 1
A kind of ladle corundum-spinel castable and preparation method thereof.It is additional in the substrate material of 35~40 parts of quality
The organic fiber of 0.02 ~ 0.15 part of quality, the calcium lignosulfonate of 0.04 ~ part quality, the tripolyphosphate of 0.08 ~ 0.12 part of quality
The aluminium powder of sodium, the calgon of 0.03 ~ 0.06 part of quality and 0.01 ~ 0.03 part of quality, mixes, obtains compound；Again to mixed
The aggregate that 60~65 parts of quality are added in material is closed, dry-mixed, then the water of additional 5.5 ~ 6 parts of quality is stirred, and installation mold is poured
Vibration moulding is noted, 12 ~ 48 hours are incubated under the conditions of 110 ~ 200 DEG C, the demoulding produces ladle corundum-spinel castable.
The percentage composition that the composition of substrate material described in the present embodiment and each composition account for substrate material is：Fused white corundum fine powder is accounted for
30 ~ 48wt%, fused magnesite fine powder accounts for 3 ~ 8wt%, particle diameter D50For 5 μm of α-Al2O3Micro mist accounts for 5 ~ 15wt%, particle diameter D50For 3 μm
α-Al2O3Micro mist accounts for 5 ~ 15wt%, particle diameter D50For 1 μm of α-Al2O3Micro mist accounts for 5 ~ 15wt%, and alumina gel powder accounts for 12 ~ 20wt%.
Aggregate described in the present embodiment is corundum in granules containing magnesium, and the content of MgO of the corundum in granules containing magnesium is 1 ~ 3wt%；It is described to contain magnesium
The grain composition of corundum in granules is：Wherein particle diameter is the 25mm ~ 15mm 0.5 ~ 5wt% that accounts for, and particle diameter is less than or equal to 10mm and is more than
5mm's accounts for 30 ~ 35wt%, and particle diameter is less than or equal to 5mm and accounts for 20 ~ 25wt% more than 3mm, and particle diameter is less than or equal to 3mm and big
In the 1mm 15 ~ 20wt% that accounts for, particle diameter is less than or equal to 1mm and accounts for 20 ~ 25wt% more than 0.088mm.
Ladle prepared by the present embodiment with corundum-spinel castable after testing：Normal temperature after 1500 DEG C × 3h burns resists
Folding intensity is 15 ~ 18MPa, and compressive resistance is 90 ~ 100MPa；Rupture strength conservation rate is 21 ~ 23% after 1100 DEG C of water-cooleds five times；
1500 DEG C of Static crucible method anti-slag experiment erosion index are 11 ~ 13%, and penetration index is 33 ~ 35%.
Embodiment 2
A kind of ladle corundum-spinel castable and preparation method thereof.It is additional in the substrate material of 30~35 parts of quality
The organic fiber of 0.02 ~ 0.15 part of quality, the calcium lignosulfonate of 0.04 ~ 0.08 part of quality, the trimerization of 0.08 ~ 0.12 part of quality
The aluminium powder of sodium phosphate, the calgon of 0.03 ~ 0.06 part of quality and 0.01 ~ 0.03 part of quality, mixes, obtains compound；Again
The aggregate of 65~70 parts of quality is added into compound, dry-mixed, then the water of additional 4.5 ~ 5.0 parts of quality is stirred, installed
Mould, pours into a mould vibration moulding, and 12 ~ 48 hours are incubated under the conditions of 110 ~ 200 DEG C, and the demoulding produces ladle and poured with corundum-spinel
Material feeding.
The percentage composition that the composition of substrate material described in the present embodiment and each composition account for substrate material is same as Example 1.
Aggregate described in the present embodiment is corundum in granules containing magnesium, and the content of MgO of the corundum in granules containing magnesium is 1 ~ 3wt%；It is described to contain magnesium
The grain composition of corundum in granules is：Wherein particle diameter is less than or equal to 10mm and accounts for 30 ~ 35wt% more than 5mm, and particle diameter is less than or waited
Account for 20 ~ 25wt% in 5mm and more than 3mm, particle diameter is less than or equal to 3mm and accounts for 15 ~ 20wt% more than 1mm, particle diameter be less than or
20 ~ 25wt% is accounted for equal to 1mm and more than 0.088mm.
Ladle obtained by the present embodiment with corundum-spinel castable after testing：Normal temperature after 1500 DEG C × 3h burns resists
Folding intensity is 17 ~ 20MPa, and compressive resistance is 95 ~ 105MPa；Rupture strength conservation rate is 23 ~ 25% after 1100 DEG C of water-cooleds five times；
1500 DEG C of Static crucible method anti-slag experiment erosion index are 10 ~ 12%, and penetration index is 31 ~ 33%.
Embodiment 3
A kind of ladle corundum-spinel castable and preparation method thereof.It is additional in the substrate material of 25~30 parts of quality
The organic fiber of 0.02 ~ 0.15 part of quality, the calcium lignosulfonate of 0.04 ~ 0.08 part of quality, the trimerization of 0.08 ~ 0.12 part of quality
The aluminium powder of sodium phosphate, the calgon of 0.03 ~ 0.06 part of quality and 0.01 ~ 0.03 part of quality, mixes, obtains compound；Again
The aggregate of 70~75 parts of quality is added into compound, dry-mixed, then the water of additional 5.0 ~ 5.5 parts of quality is stirred, installed
Mould, pours into a mould vibration moulding, and 12 ~ 48 hours are incubated under the conditions of 110 ~ 200 DEG C, and the demoulding produces ladle and poured with corundum-spinel
Material feeding.
In the present embodiment：The percentage composition that the composition of the substrate material and each composition account for substrate material is same as Example 1；Institute
State aggregate same as Example 1.
Ladle obtained by the present embodiment with corundum-spinel castable after testing：Normal temperature after 1500 DEG C × 3h burns resists
Folding intensity is 18 ~ 21MPa, and compressive resistance is 100 ~ 110MPa；Rupture strength conservation rate is 22 ~ 24% after 1100 DEG C of water-cooleds five times；
1500 DEG C of Static crucible method anti-slag experiment erosion index are 13 ~ 15%, and penetration index is 34 ~ 36%.
Embodiment 4
A kind of ladle corundum-spinel castable and preparation method thereof.It is additional in the substrate material of 20~25 parts of quality
The organic fiber of 0.02 ~ 0.15 part of quality, the calcium lignosulfonate of 0.04 ~ 0.08 part of quality, the trimerization of 0.08 ~ 0.12 part of quality
The aluminium powder of sodium phosphate, the calgon of 0.03 ~ 0.06 part of quality and 0.01 ~ 0.03 part of quality, mixes, obtains compound；Again
The aggregate of 75~80 parts of quality is added into compound, dry-mixed, then the water of additional 4 ~ 4.5 parts of quality is stirred, mould is installed
Tool, pours into a mould vibration moulding, and 12 ~ 48 hours are incubated under the conditions of 110 ~ 200 DEG C, and the demoulding produces ladle and poured into a mould with corundum-spinel
Material.
In the present embodiment：The percentage composition that the composition of the substrate material and each composition account for substrate material is same as Example 1；Institute
State aggregate same as Example 2.
Ladle obtained by the present embodiment 4 with corundum-spinel castable after testing：Normal temperature after 1500 DEG C × 3h burns resists
Folding intensity is 19 ~ 22MPa, and compressive resistance is 105 ~ 110MPa；Rupture strength conservation rate is 25 ~ 27% after 1100 DEG C of water-cooleds five times；
1500 DEG C of Static crucible method anti-slag experiment erosion index are 10 ~ 12%, and penetration index is 31 ~ 33%.
Present embodiment has following good effect compared with prior art：
（1）MgO to be introduced in the form of corundum containing magnesium, on the one hand can be reduced in-situ preparation spinelle by present embodiment
The permanent line expansion brought in course of reaction, on the other hand, is avoided that and cause spinelle point because of in situ spinel
The uneven situation of cloth, therefore improve the volume stability and resistance to slag corrosion of material.
（2）Present embodiment introduces corundum in granules containing magnesium, and high-temperature lower part point magnesia is solidly soluted into corundum, activates oxygen
Change aluminium lattice, aluminum oxide can more absorb calcium oxide in use, magnesium aluminate spinel being capable of balanced solid solution longer
Mn, Fe component in slag, so as to reduce viscosity coefficient of dross, slows down its speed for corroding infiltration.
（3）Present embodiment uses the α-Al that three-level particle diameter is arranged in pairs or groups2O3Micro mist, can realize that gradient is in situ in substrate material
Reaction generation spinelle, its size distribution is suitable, it is ensured that matrix close mode.
（4）Present embodiment prepare ladle with corundum-spinel castable after testing：After 1500 DEG C × 3h burns
Strength at normal temperature is 15 ~ 22MPa, and compressive resistance is 90 ~ 110MPa；Rupture strength conservation rate is 21 after 1100 DEG C of water-cooleds five times
~27%；1500 DEG C of Static crucible method anti-slag experiment erosion index are 10 ~ 15%, and penetration index is 31 ~ 36%.
Therefore, the ladle corundum-spinel castable that prepared by present embodiment has that volume stability is good, intensity
The characteristics of high, strong thermal shock resistance and excellent resistance to slag corrosion.
Claims (8)
1. a kind of preparation method of ladle corundum-spinel castable, it is characterised in that the preparation method is：20~40
The organic fiber of additional 0.02 ~ 0.15 part of quality in the substrate material of part quality, the calcium lignosulfonate of 0.04 ~ 0.08 part of quality,
The aluminium of the sodium tripolyphosphate of 0.08 ~ 0.12 part of quality, the calgon of 0.03 ~ 0.06 part of quality and 0.01 ~ 0.03 part of quality
Powder, mixes, obtains compound；The aggregate of 60~80 parts of quality, dry-mixed, then additional 4 ~ 6 parts of quality are added into compound again
Water be stirred, installation mold, pour into a mould vibration moulding, under the conditions of 110 ~ 200 DEG C be incubated 12 ~ 48 hours, the demoulding, produce steel
Bag corundum-spinel castable；
The percentage composition that the composition of the substrate material and each composition account for substrate material is：Fused white corundum fine powder accounts for 30 ~ 48wt%, electricity
Fused magnesia fine powder accounts for 3 ~ 8wt%, particle diameter D50For 5 μm of α-Al2O3Micro mist accounts for 5 ~ 15wt%, particle diameter D50For 3 μm of α-Al2O3Micro mist
Account for 5 ~ 15wt%, particle diameter D50For 1 μm of α-Al2O3Micro mist accounts for 5 ~ 15wt%, and alumina gel powder accounts for 12 ~ 20wt%；
The aggregate is corundum in granules containing magnesium, and the content of MgO of the corundum in granules containing magnesium is 1 ~ 3wt%；Of the corundum in granules containing magnesium
Grade is matched somebody with somebody：Wherein particle diameter accounts for 0 ~ 5wt% for 25mm ~ 15mm, particle diameter be less than or equal to 10mm and more than 5mm account for 30 ~
35wt%, particle diameter is less than or equal to 5mm and accounts for 20 ~ 25wt% more than 3mm, and particle diameter is less than or equal to 3mm and accounts for 15 more than 1mm
~ 20wt%, particle diameter is less than or equal to 1mm and accounts for 20 ~ 25wt% more than 0.088mm.
2. the preparation method of ladle corundum-spinel castable according to claim 1, it is characterised in that described electricity
The Al of molten white fused alumina fine powder2O3Content>99wt%, particle diameter<0.088mm.
3. the preparation method of ladle corundum-spinel castable according to claim 1, it is characterised in that the electric smelting
The content of MgO of magnesia powder>97wt%, particle diameter<0.088mm.
4. the preparation method of ladle corundum-spinel castable according to claim 1, it is characterised in that the α-
Al2O3The Al of micro mist2O3Content>99wt%.
5. the preparation method of ladle corundum-spinel castable according to claim 1, it is characterised in that the aluminium coagulates
The Al of rubber powder2O3Content is 60~80wt%, particle diameter<1μm.
6. the preparation method of ladle corundum-spinel castable according to claim 1, it is characterised in that described wooden
Wooden cellulose content≤55% of plain sulfoacid calcium, pH value is 4.5 ~ 6.5, water part≤9%.
7. the preparation method of ladle corundum-spinel castable according to claim 1, it is characterised in that the aluminium powder
Al content>99wt%, particle diameter<0.088mm.
8. a kind of ladle corundum-spinel castable, it is characterised in that the ladle is basis with corundum-spinel castable
Ladle prepared by the preparation method of ladle corundum-spinel castable any one of claim 1~7 is with just
Jade-spinel pouring material.
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| CN106588056A (en) * | 2016-12-22 | 2017-04-26 | 武汉科技大学 | Spinel-calcium hexaluminate castable used for catalytic coal gasification furnace, and preparation method thereof |
| CN108046769A (en) * | 2017-12-21 | 2018-05-18 | 鞍山澳海耐火材料有限公司 | A kind of medium temperature wear-resistant castable for light-burned MgO electrical kilns heating zone inner wall |
| CN108046770A (en) * | 2017-12-21 | 2018-05-18 | 鞍山澳海耐火材料有限公司 | A kind of low temperature wear-resistant castable for light-burned MgO electrical kilns forced heat-exchanging device liner |
| CN110272268A (en) * | 2018-03-17 | 2019-09-24 | 鞍山盛晨耐火材料有限公司 | A kind of preparation method of ladle corundum lining brick |
| CN108610027B (en) * | 2018-07-16 | 2021-09-24 | 武汉科技大学 | High-performance cement-bonded castable and preparation method thereof |
| CN110451998A (en) * | 2019-08-27 | 2019-11-15 | 北京利尔高温材料股份有限公司 | A kind of bottom of steel ladle castable |
| CN111635220A (en) * | 2020-06-15 | 2020-09-08 | 武汉钢铁有限公司 | Refractory material for preventing slag entrapment of steel ladle, steel ladle slag entrapment prevention product and preparation method of steel ladle slag entrapment prevention product |
| CN113943167B (en) * | 2021-12-02 | 2022-12-27 | 湖南湘钢瑞泰科技有限公司 | RH dip pipe castable and preparation method thereof |
| CN116041050B (en) * | 2023-01-12 | 2023-11-17 | 浙江自立高温科技股份有限公司 | Anti-stripping complex-phase corundum spinel castable for refining ladle and preparation method thereof |
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| CN101462886B (en) * | 2008-12-31 | 2012-10-31 | 武汉科技大学 | Al2O3-MgO fire-resistant material pouring casting material and preparation thereof |
| CN102718512B (en) * | 2012-06-28 | 2014-07-02 | 洛阳利尔耐火材料有限公司 | Thermal-shock-resistant corundum-spinel refractory castable and preparation method thereof |
| CN104446543B (en) * | 2014-11-26 | 2016-08-17 | 武汉科技大学 | A kind of micro-closed pore of lightweight is containing magnesium corundum fireproof aggregate and preparation method thereof |
| CN104557078B (en) * | 2014-12-12 | 2016-08-24 | 长兴优联马科技有限公司 | A kind of high fine and close resistance to thermal shock refractory castable for ladle |
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Application publication date: 20151118 Assignee: Wuhan University of science and Technology Business Incubator Co.,Ltd. Assignor: WUHAN University OF SCIENCE AND TECHNOLOGY Contract record no.: X2020420000003 Denomination of invention: A corundum spinel castable for ladle and its preparation method Granted publication date: 20170711 License type: Common License Record date: 20201021 |
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