CN1298465C - Bottom fire-proof material of large steel ladle - Google Patents
Bottom fire-proof material of large steel ladle Download PDFInfo
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- CN1298465C CN1298465C CNB2004100174813A CN200410017481A CN1298465C CN 1298465 C CN1298465 C CN 1298465C CN B2004100174813 A CNB2004100174813 A CN B2004100174813A CN 200410017481 A CN200410017481 A CN 200410017481A CN 1298465 C CN1298465 C CN 1298465C
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- magnesia
- refractory material
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- 229910000831 Steel Inorganic materials 0.000 title abstract description 31
- 239000010959 steel Substances 0.000 title abstract description 31
- 239000000463 material Substances 0.000 title description 113
- 239000000843 powder Substances 0.000 claims abstract description 24
- 239000011819 refractory material Substances 0.000 claims abstract description 20
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 18
- 229910052596 spinel Inorganic materials 0.000 claims abstract description 15
- 239000011029 spinel Substances 0.000 claims abstract description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000002270 dispersing agent Substances 0.000 claims abstract description 6
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 58
- 239000000395 magnesium oxide Substances 0.000 claims description 34
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 26
- 239000002245 particle Substances 0.000 claims description 19
- 239000011863 silicon-based powder Substances 0.000 claims description 12
- 239000003595 mist Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 6
- 239000001488 sodium phosphate Substances 0.000 claims description 5
- 229910000162 sodium phosphate Inorganic materials 0.000 claims description 5
- 239000013638 trimer Substances 0.000 claims description 5
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 5
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 abstract description 6
- 235000014380 magnesium carbonate Nutrition 0.000 abstract description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract 1
- GANNOFFDYMSBSZ-UHFFFAOYSA-N [AlH3].[Mg] Chemical compound [AlH3].[Mg] GANNOFFDYMSBSZ-UHFFFAOYSA-N 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 230000007547 defect Effects 0.000 abstract 1
- 229910052749 magnesium Inorganic materials 0.000 abstract 1
- 239000011777 magnesium Substances 0.000 abstract 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 abstract 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 abstract 1
- 239000001095 magnesium carbonate Substances 0.000 abstract 1
- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 239000010703 silicon Substances 0.000 abstract 1
- 239000011449 brick Substances 0.000 description 16
- 229910001051 Magnalium Inorganic materials 0.000 description 12
- 239000002893 slag Substances 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 8
- 239000000835 fiber Substances 0.000 description 8
- 239000002994 raw material Substances 0.000 description 8
- 239000004411 aluminium Substances 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 7
- 238000011068 loading method Methods 0.000 description 6
- 229910010271 silicon carbide Inorganic materials 0.000 description 6
- 229910004298 SiO 2 Inorganic materials 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 238000005266 casting Methods 0.000 description 5
- 229910052593 corundum Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 5
- 240000002853 Nelumbo nucifera Species 0.000 description 4
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 4
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 4
- 238000005336 cracking Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 239000010431 corundum Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 2
- 238000009435 building construction Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- UAMZXLIURMNTHD-UHFFFAOYSA-N dialuminum;magnesium;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[Mg+2].[Al+3].[Al+3] UAMZXLIURMNTHD-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000126 substance Chemical group 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- 150000004645 aluminates Chemical class 0.000 description 1
- HIGRAKVNKLCVCA-UHFFFAOYSA-N alumine Chemical compound C1=CC=[Al]C=C1 HIGRAKVNKLCVCA-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical group O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000011010 synthetic spinel Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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Abstract
The present invention relates to a refractory material, particularly to a bottom refractory material of a large-size steel ladle, which solves the defects of the existing steel ladles that the bottom refractory materials are easy to shed, crack and damage by leaked steel. The bottom refractory material of a large-size steel ladle comprises 70 to 85 wt% of special grade bauxite, 3 to 15 wt% of magnesite fine powder, 3 to 10 wt% of aluminium magnesium spinel micro-powder, 0.5 to 5 wt% of silicon micro-powder, 1 to 5 wt% of magnesium combining agents and 0.1 to 0.2 wt% of dispersing agents. The present invention is mainly used for the large-size steel ladles refined by the special steel such as ultra low carbon steel, etc.
Description
Technical field: the present invention relates to a kind of refractory material, refractory material at the bottom of particularly a kind of large-scale ladle bag.
Background technology:
The working lining of anti-material complex structure at the bottom of the large-scale ladle bag, the setting of bag end impact zone prefabricated section, air brick and pocket block has restricted the change of the anti-equipment structure of underwrite lining work, makes the Temperature Distribution of underwrite lining work and stress distribution complicated.Because the anti-material of ladle underwrite lining work is in the plane that is subjected to the strict restriction of ladle shell, therefore, the use of anti-material damage at the bottom of the ladle bag, the erosion of washing away except high-temperature molten steel and slag, also existence is peeled off, is ftractureed and oozes the damage that steel causes, anti-material produces the reason of peeling off, ftractureing and oozing steel at the bag end, the bulk effect that physical-chemical reaction produces under violent variations in temperature and the high temperature of anti-the material in being to use.For large-scale ladle, the cumulative function of the high temperature of anti-material lower volume effect makes the bag easier generation in the end peel off, ftracture and oozes steel and damages.Generally speaking, anti-material should satisfy the performance requirement of following two aspects at the bottom of the ladle bag:
1) has rational hot expansion rate, avoid cracking to produce, prevent to ooze steel.
2) have higher anti-slag and scour resistance, make underwrite lining work have the high life.
The anti-material of underwrite lining work in the past is high alumina matter, magnalium carbonaceous, alabaster-SiC matter and high-purity aluminate or magnalium matter.The anti-material refractoriness under load of high alumina matter height, existing Al
2O
3-SiO
2The system's carbon-free non-sintered high aluminium of anti-material brick in the bag end expands because of the secondary mullite reaction produces between 1350 ~ 1600 ℃, and the refractoriness under load of material all is higher than 1450 ℃.In temperature-rise period, have only after the highest expansion temperature of crossing between 1500 ~ 1600 ℃, high-alumina brick just shows tangible contraction and loading softening occurs, and its loading softening curve is as shown in Figure 2.Easily peel off damage in the use, service life is low and influence the safe handling of underwrite lining work.Magnalium carbonaceous hot strength of anti-material the and coefficient of thermal expansion are all high, easily cause the cracking damage of ladle involucrum bottom in the use, also cause molten steel recarburization and should not smelt as ultra-low-carbon steel and use.Alabaster-anti-material of SiC matter has hot microdilatancy performance, and the lotus softening temperature is lower, and as bag during bottom material, that can effectively avoid wrapping the end peels off the damage phenomenon.But shortcomings such as alabaster-SiC brick exists, and melting loss speed is fast, service life is short, and cause the remarkable carburetting of molten steel when the carborundum melting loss decomposes in the material, so alabaster-SiC brick should not be as the bag bottom material of clean steel hydrometallurgys such as ultra-low-carbon steel refining.Rafifinal spinelle or the anti-material of magnalium matter ladle underwrite lining work that heat-resistant steel fiber strengthens also can obtain good result of use, but the material cost height.Existing rafifinal spinel or magnalium pouring materialfor steel ladle are with Al
2O
3-SiO
2Based material is similar, and the rafifinal magnesian generates the spinelle reaction and causes the volume rapid expanding between about 1100 ~ 1300 ℃.And material is often made bond with aluminous cement, the Al in the material
2O
3And the CaO in the cement reacts between about 1400 ~ 1500 ℃ and generates CA
6Also can produce bigger volumetric expansion, so Al
2O
3-MgO based material often has up to the refractoriness under load more than 1600 ℃, and the loading softening curve of typical high-purity corundum spinel pouring material also is shown among Fig. 2.When rafifinal spinelle or magnalium material are used to wrap the end, often adopt and in material, introduce the antistrip performance that heat-resistant steel fiber improves material.Heat-resistant steel fiber improves the antistrip performance of material by the cracking resistance toughness that improves material, but heat-resistant steel fiber is not just having castering action to material cracking resistance toughness more than 1200 ℃, oxidation generation volumetric expansion reduces the high volume stability of material under the steel fibre high temperature, also in refractory material, produce the iron oxide impurity of concentrating after the steel fibre oxidation, reduce the fire resistance of material.Therefore, there is certain limitation in heat-resistant steel fiber raising refractory material antistrip performance.
Summary of the invention:
The technical issues that need to address of the present invention are: improve the high volume behavior stability of the anti-material in the bag end, reduce its refractoriness under load, improve the service life of underwrite lining work and reduce material consumption.A kind of slag corrosion resistance and anti-molten steel scouring function admirable are provided, satisfy and do not have carbon refractory at the bottom of ultra-low-carbon steel is smelted the ladle bag of needs.
The present invention's mentality of designing of filling a prescription: anti-material high-purity, high performance technological development direction are all emphasized in anti-material exploitation at the bottom of the ladle bag in the past.The present invention is according to the actual service conditions of the anti-material of steel underwrite lining work, break through conventional material mentality of designing, do not pursue the high-performance of ladle bottom material merely, anti-material hangs down refractoriness under load, the appropriate performance combination technique thinking that expands and take into account the anti-molten steel scouring performance of anti-slag at the bottom of proposing ladle, from the above-mentioned performance combination of material, designing by alumine is main aggregate, the anti-material of large-scale ladle underwrite lining work that cooperates magnesia powder, spinelle micro mist, ultrafine silica powder and magnesia bond manufacturing to form.
The present invention adopts to be different from and introduce the method that steel fibre improves material in castable refractory, but to the alumina aluminum-spinel material of alumina-magnesia-silica system, adjust the composition point of material by the change of material furnish component and bond, make material at high temperature produce a certain amount of high-temperature liquid-phase and high-temp plastic, formation has low refractoriness under load and still can keep the material of higher fire resistance to form simultaneously, thereby make under the ladle underwrite lining work material at high temperature of exploitation and have the ability that cushions thermal stress preferably, this material can be directly used in the casting and constructing at the bottom of the ladle, also can be made into building construction behind the casting preformed block.
Realize that the softening key technology of the low lotus of magnalium material is to select suitable raw material and proportioning thereof, the refractoriness under load of material is reduced.For realizing the target of above-mentioned material performance design, determining of bag bottom material raw material type of the present invention and proportioning is described below:
1) main material
Select the high grade bauxite (Al2O3 〉=89wt%) of cheap, better performances from product of the present invention.Alumina is mainly as granulated aggregate, and part adds less than 180 purpose fine powder form with particle diameter, and be used to change matrix and form, thus the refractoriness under load of more effectively regulating material.The high grade bauxite addition is 70～85wt%.
2) magnesia powder
For making material form the good original position spinelle of slag resistance in high temperature uses, product of the present invention adds magnesia powder in prescription.The introducing of magnesia powder has the effect of two aspects: the one, and the aluminium oxide reaction during high temperature and in the material produces volumetric expansion, makes material keep the hot expansion of appropriateness; The 2nd, generate original position aluminum-spinel with the aluminium oxide reaction with good anti-slag melting loss and slag penetration resistance energy, improve the slag resistance of material.But the addition of magnesia powder has remarkable influence to material property.With the raising of magnesia powder addition, the expansion rate that the refractoriness under load of material and aluminum-spinel reaction cause all will obviously improve.Therefore, to the essential restriction of the addition of magnesia powder.Magnesia powder is controlled at 3～15wt% scope for well.Fig. 1 is the situation that the hot expansion rate of material sample changes with content of magnesia.
3) spinelle micro mist
The reaction of aluminium oxide and magnesia generates significant expansion of process generation of spinelle in the matrix of materials fine powder, and unfavorable to the high volume stability of material, the reaction swell increment of magnesia and aluminium oxide should be controlled in the scope of appropriateness.Therefore, can be in the material by produce the limited amount system of original position spinelle by the adding magnesia powder, need in watering material feeding matrix fine powder, introduce the micro mist of the pre-synthetic spinel preparation of a part, improve the content of magnesia of material, satisfying the needs of material slag resistance, and keep to satisfy the hot strength of instructions for use and high volume stability preferably.On the other hand, the adding of spinelle micro mist can reduce mixing and stirring moisture and increasing flowability of material casting and constructing, improves the density and the intensity of material.Aluminum-spinel micro mist addition is generally 3～10wt%.It is not obvious to be lower than 3% effect, is higher than 10%, to water material feeding reduce mix and stir moisture, to improve construction mobile unfavorable, also increases cost of material.
4) silicon powder
Silicon powder is silica content during the adjustment matrix of materials is formed, reduces the important furnish component of material refractoriness under load that silicon powder also has the stronger effect that helps combination and inhibition material at high temperature to expand.The silicon powder addition should accurately be controlled, and too much adds slag resistance and service life that silicon powder will obviously reduce material.The silicon powder addition should be controlled at 0.5～5wt%.
5) bond
CaO or chemical bond in cement are introduced impurity in material, the consistent magnesia of employing of the present invention and material batching composition is greater than 75% magnesia bond, makes material can form higher intensity and more convenient the matrix composition of controlling material.The bond addition is 1～5wt%.It is not enough to be lower than 1% o'clock strength of materials, be higher than 5% after, it is not obvious that the strength of materials increases.
Based on above consideration, raw material of the present invention are alumina particle and fine powder, magnesia powder, spinelle micro mist, silicon powder and magnesia bond, change the composition of material by the adjusting raw material ratio, thereby material physical chemistry performance and high-temperature behavior are controlled.
Technical scheme of the present invention is: refractory material at the bottom of a kind of large-scale ladle bag, and proportioning consists of: high grade bauxite 70 ~ 85wt%, magnesia powder 3 ~ 15wt%, aluminum-spinel micro mist 3 ~ 10wt%, silicon powder 0.5 ~ 5wt%, magnesia bond 1～5% adds dispersant 0.1～0.2%.
High grade bauxite is formed with the alumina particle and the fine powder of different-grain diameter, specifically forms proportioning and is:
High grade bauxite 10 ~ 30wt% of particle diameter 15 ~ 7mm
High grade bauxite 5 ~ 25wt% of particle diameter 7 ~ 3mm
High grade bauxite 10 ~ 25wt% of particle diameter 3 ~ 1mm
High grade bauxite 10 ~ 25wt% of particle diameter 1 ~ 0mm
High grade bauxite 2 ~ 15wt% of particle diameter≤0.088mm
Magnesia bond selects for use east, Yixing, Jiangsu to contain the DMG75 of ceramic industry new material company; Dispersant is selected a kind of in sodium phosphate trimer and the calgon for use, preferred sodium phosphate trimer; Particle diameter≤the 0.088mm of magnesia powder, aluminum-spinel grain size of micropowder≤3.0 μ m, silicon powder particle diameter≤1.0 μ m.
The invention has the beneficial effects as follows: the material that the present invention obtains has the advantage of low-cost and high life, and the cost performance of material obviously is better than anti-material at the bottom of in the past the large-scale ladle bag.Material property is characteristics with lower refractoriness under load and an amount of hot expansion rate, and the working condition that can be adapted to the ladle underwrite lining work is preferably eliminated the service life of peeling off damage, prolonging the anti-material in the bag end effectively to the requirement of anti-wood property energy.Carbon containing not in the material that the present invention obtains can satisfy the requirement of special steel grade such as ultra-low-carbon steel to the anti-material in the bag end, avoided carbon containing or carborundum bag at the bottom of anti-material molten steel is caused remarkable carburetting.Material is formed as shown in table 1 to the influence of refractoriness under load, and the material property of the present invention and alumina-magnesia brick relatively sees Table 2, and table 2 shows that material property of the present invention is better than alumina-magnesia brick.The loading softening curve of each sample is shown among Fig. 2, as a comparison, has also listed the loading softening curve of existing non-sintered high aluminium brick and high-purity corundum spinel pouring material preformed bricks.Fig. 2 shows that the pre-brick of magnalium all has lower refractoriness under load at the bottom of the ladle of exploitation, and all there are obviously high refractoriness under load in existing non-sintered high aluminium brick and high-purity corundum spinel pouring material preformed bricks.In sum, can reach the raw material of the refractory material of ladle underwrite lining work serviceability requirement.
The MgO of table 1 sample, SiO
2Content and performance
| Specimen coding | 1 | 2 | 3 | 4 | 5 | 6 |
| Content of magnesia, % | 10.6 | 11.8 | 13.9 | 15.6 | 17.1 | 17.3 |
| -180 order alumina amounts, % | 13 | 10.5 | 7.5 | 3 | 9 | 6 |
| SiO 2Content, % | 5.4 | 5.7 | 5.6 | 7.1 | 6.5 | 5.8 |
| Refractoriness under load, T2 0.2MPa | 1310 | 1340 | 1360 | 1390 | 1400 | 1410 |
Table 2 the present invention and the contrast of magnalium material property
| Data Source | Material | Chemical analysis, % | Performance | ||||||
| Al 2O 3 | MgO | SiO 2 | Bulk density g/cm 3 | Compressive resistance MPa | Porosity % | 1500 ℃ * 3h line rate of change % | Soft ℃ of lotus | ||
| The present invention | Al-mg-si | 70-85 | 8-20 | 3.5-8. 4 | 2.8-3.1 | 50-100 | 15-21 | +0.2-+0.8 | 1300-1400 |
| Shandong metallurgy, 1999. No.3, P.71 | Magnalium | 90-95 | 5-7 | ≤0.5 | 3.0-3.2 | 20-35 | 14-16 | 0.01-0.05 | 1600-1650 |
| Refractory material, 1998. No.1, P.37-39 | Magnalium | Al2O3+MgO： 97.1 | ≤0.5 | No detailed data | 53.5 | 18.3 | +0.6 | No detailed data | |
| Refractory material 1998. No.4, P. 189-191,203 | Magnalium | No detailed data | 6 | No detailed data | ＞1400 | ||||
Description of drawings:
Fig. 1 is a material sample thermal expansion curve
Fig. 2 is the loading softening curve of bag bottom material
The specific embodiment:
The raw material proportioning of embodiment 1-4 material is as shown in table 3, and magnesia bond selects for use east, Yixing, Jiangsu to contain the DMG75 of ceramic industry new material company, and conventional compound method is adopted in the preparation of bag end refractory material, and is as shown in table 4 with the performance comparison of existing non-sintered high aluminium brick.Produce the bag bottom material by table 3 proportioning and at the bottom of 300 tons of ladle bags, carried out the real stove test of cast-in-site.Test products reached more than 100 heats in the following life-span of condition that cost is lower than the non-sintered high aluminium brick, was more than 3 times of life-span at the bottom of the former non-sintered high aluminium brick bag, did not peel off the damage phenomenon in the real stove test.
Table 3 embodiment raw material proportioning wt%
| Raw material | Particle diameter | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| The high-quality alumina | 15~7mm | 29 | 20 | 20 | 12 |
| 7~3mm | 7 | 18 | 18 | 20 | |
| 3~1mm | 20 | 15 | 15 | 20 | |
| 1~0mm | 13.5 | 17.5 | 17.5 | 18 | |
| ≤0.088mm | 13 | 10.5 | 7.5 | 3 | |
| 97 fused magnesites | ≤0.088mm | 6 | 8 | 10 | 12 |
| The aluminum-spinel micro mist | ≤3.0μm | 6 | 6 | 7 | 9 |
| Silicon powder | ≤1.0μm | 1.5 | 2 | 2 | 4 |
| Magnesia bond | 4 | 3 | 3 | 2 | |
| Sodium phosphate trimer adds | 0.12 | 0.15 | 0.15 | 0.20 | |
The performance of table 4 embodiment material
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Prior art (non-sintered high aluminium brick) | |
| Strength at normal temperature, MPa | 110℃×24h | 9.5 | 7.3 | 7.8 | 6.2 | 5.9 |
| 1600℃×3h | 6.9 | 7.8 | 8.2 | 7.9 | 17.8 | |
| Cold crushing strength, MPa | 110℃×24h | 72.3 | 77.2 | 70.1 | 73.3 | 96.4 |
| 1600℃×3h | 51.2 | 55.6 | 61.3 | 63.9 | 92.2 | |
| High temperature break resistant intensity, MPa | 1400℃×1h | 4.8 | 4.6 | 4.1 | 3.8 | 4.7 |
| The soft T2 of lotus, ℃ | 1310 | 1340 | 1360 | 1390 | 1620 | |
| Remaining line changes % | 1600℃×3h | +0.1 | +0.3 | +0.3 | +1.0 | +1.7 |
What the present invention designed and developed is the large-scale ladle bag of the alumina aluminum-spinel matter bottom material of feature with low refractoriness under load, adopt middle-grade formula for raw stock combination to make, service life, more original material can significantly improve, and the cost performance of material obviously is better than the anti-material of original ladle underwrite lining work.This material can be directly used in the casting and constructing at the bottom of the ladle, also can be made into building construction behind the casting preformed block, also can satisfy ultra-low-carbon steel and general pure steel grade and smelt requirement to the anti-material of ladle.Have general adaptability, similar at home and abroad steel mill all can promote the use of.
Claims (6)
1, refractory material at the bottom of a kind of large-scale ladle bag, proportioning consists of: high grade bauxite 70 ~ 85wt%, magnesia powder 3 ~ 15wt%, aluminum-spinel micro mist 3 ~ 10wt%, silicon powder 0.5 ~ 5wt%, magnesia bond 1～5%, add dispersant 0.1～0.2%, wherein alundum (Al content is more than or equal to 89% in the high grade bauxite, and content of magnesia is greater than 75% in the magnesia bond, and dispersant is a kind of in sodium phosphate trimer and the calgon.
2, refractory material at the bottom of a kind of large-scale ladle bag according to claim 1 is characterized in that alumina particle and the fine powder composition of described high grade bauxite with different-grain diameter, specifically forms proportioning and is:
High grade bauxite 10 ~ 30wt% of particle diameter 15 ~ 7mm
High grade bauxite 5 ~ 25wt% of particle diameter 7 ~ 3mm
High grade bauxite 10 ~ 25wt% of particle diameter 3 ~ 1mm
High grade bauxite 10 ~ 25wt% of particle diameter 1 ~ 0mm
High grade bauxite 2 ~ 15wt% of particle diameter≤0.088mm.
3, refractory material at the bottom of a kind of large-scale ladle bag according to claim 1 is characterized in that described dispersant is a sodium phosphate trimer.
4, refractory material at the bottom of a kind of large-scale ladle bag according to claim 1 is characterized in that the particle diameter≤0.088mm of described magnesia powder.
5, refractory material at the bottom of a kind of large-scale ladle bag according to claim 1 is characterized in that described aluminum-spinel grain size of micropowder≤3.0 μ m.
6, refractory material at the bottom of a kind of large-scale ladle bag according to claim 1 is characterized in that described silicon powder particle diameter≤1.0 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100174813A CN1298465C (en) | 2004-04-05 | 2004-04-05 | Bottom fire-proof material of large steel ladle |
Applications Claiming Priority (1)
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| CNB2004100174813A CN1298465C (en) | 2004-04-05 | 2004-04-05 | Bottom fire-proof material of large steel ladle |
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| CN1680059A CN1680059A (en) | 2005-10-12 |
| CN1298465C true CN1298465C (en) | 2007-02-07 |
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| CNB2004100174813A Expired - Fee Related CN1298465C (en) | 2004-04-05 | 2004-04-05 | Bottom fire-proof material of large steel ladle |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101602611B (en) * | 2009-04-17 | 2012-01-25 | 陈红良 | Raw material formulation of ladle heat insulation cover and preparation method of ladle heat insulation cover |
| CN101921120B (en) * | 2010-07-07 | 2012-10-10 | 德清县凯瑞新材料有限公司 | Refractory material of intermediate container for steel making |
| CN101934550B (en) * | 2010-08-02 | 2013-07-31 | 成都府天新材料科技有限公司 | Manufacturing method of fired steel fibre gas permeable bricks |
| 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 |
| CN106810218A (en) * | 2016-12-28 | 2017-06-09 | 江苏苏嘉集团新材料有限公司 | Carbon-free ladle brick of high intensity and preparation method thereof |
| CN106735146B (en) * | 2016-12-28 | 2018-09-14 | 安徽工业大学 | A kind of preparation process of the assembly method of tundish prestress application mechanism and anti-downwarp tundish |
| CN107540356A (en) * | 2017-09-04 | 2018-01-05 | 河南鑫诚耐火材料股份有限公司 | A kind of carbon baking furnace flame path wall novel energy-conserving prefabricated component and preparation method thereof |
| CN109111235A (en) * | 2018-09-05 | 2019-01-01 | 云南濮耐昆钢高温材料有限公司 | A kind of alumina-spinel castable |
| CN111548129A (en) * | 2020-05-12 | 2020-08-18 | 唐山市国亮特殊耐火材料有限公司 | Anti-corrosion aluminum magnesium castable |
| CN115340395A (en) * | 2021-05-14 | 2022-11-15 | 宝山钢铁股份有限公司 | High-strength tundish magnesium slag-stopping weir plate |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0547619A1 (en) * | 1991-12-19 | 1993-06-23 | Didier-Werke Ag | Steel ladle |
| CN1100706A (en) * | 1993-09-22 | 1995-03-29 | 冶金工业部洛阳耐火材料研究院 | Method for producing refractory brick by adding chromium ore |
| CN1104190A (en) * | 1993-12-25 | 1995-06-28 | 首钢总公司 | Spinel carbon brick and its making method |
| EP0686611A1 (en) * | 1994-06-08 | 1995-12-13 | Taiko Refractories Co., Ltd. | Castable refractory material |
-
2004
- 2004-04-05 CN CNB2004100174813A patent/CN1298465C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0547619A1 (en) * | 1991-12-19 | 1993-06-23 | Didier-Werke Ag | Steel ladle |
| CN1100706A (en) * | 1993-09-22 | 1995-03-29 | 冶金工业部洛阳耐火材料研究院 | Method for producing refractory brick by adding chromium ore |
| CN1104190A (en) * | 1993-12-25 | 1995-06-28 | 首钢总公司 | Spinel carbon brick and its making method |
| EP0686611A1 (en) * | 1994-06-08 | 1995-12-13 | Taiko Refractories Co., Ltd. | Castable refractory material |
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| CN1680059A (en) | 2005-10-12 |
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