CN1415446A - Pouring material for permanent liner in pouring basket - Google Patents

Pouring material for permanent liner in pouring basket Download PDF

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Publication number
CN1415446A
CN1415446A CN 01132037 CN01132037A CN1415446A CN 1415446 A CN1415446 A CN 1415446A CN 01132037 CN01132037 CN 01132037 CN 01132037 A CN01132037 A CN 01132037A CN 1415446 A CN1415446 A CN 1415446A
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CN
China
Prior art keywords
mullite
pouring
tundish
permanent liner
content
Prior art date
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Granted
Application number
CN 01132037
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Chinese (zh)
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CN1223421C (en
Inventor
田守信
姚金甫
陈荣荣
严永亮
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Baoshan Iron and Steel Co Ltd
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Baoshan Iron and Steel Co Ltd
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Priority to CN 01132037 priority Critical patent/CN1223421C/en
Publication of CN1415446A publication Critical patent/CN1415446A/en
Application granted granted Critical
Publication of CN1223421C publication Critical patent/CN1223421C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

A permanent pouring liner for tundish contains alumine-class mullite, mullite, superfine Si powder, cement, steel fibres, and kyanite and/or silica rock. Its advantages are high heat shock resistance and strength and less line change rate.

Description

The tundish material for permanent liner in pouring
Invention field
The present invention relates to a kind of continuous casting tundish, relate in particular to a kind of continuous casting tundish material for permanent liner in pouring.
Background technology
Continuous casting tundish permanent liner is clay brick or integrated poured material at present.Along with the development of low cement and ultra-low cement deposit material technology, and water material feeding and have characteristics such as good integrity and easy construction be laborsaving, the tundish permanent liner adopts more and more and waters the material feeding construction in recent years, and its material generally adopts Al 2O 3-SiO 2Material feeding is watered by system.
The Al2O that prior art adopted 3-SiO 2Be the basket pouring material, secondary alumina or high grade bauxite that main material adopts flint clay, andalusite, shaft furnace to burn till.Flint clay and high grade bauxite be raw material to water the material feeding thermal shock resistance poor, and the secondary alumina uniformity coefficient that shaft furnace burns till is very poor, performance inconsistency is very big, is difficult to produce the material feeding of watering of function admirable.Import andalusite raw material can make performance good water material feeding, but cost is very high, domestic andalusite is second-rate, be difficult to the stable finished product of manufacturing property, and price is still higher.Al 2O 3-SiO 2Be that the basket pouring material is shorter service life, need usually by repeatedly maintenance.
Similar Al 2O 3-SiO 2System waters material feeding and also is used for clad, heating furnace etc.The principal element that influences these positions service life is to water the thermal shock resistance of material feeding.Now use Al 2O 3-SiO 2The thermal shock resistance that waters material feeding is generally at 20～40 times.The service life that is applied to clad, be 1～3 year service life that is applied to heating furnace at 80～150 times.
The spy opens clear 63-291879 patent, and adopting clay and high alumina is aggregate, and matrix adopts silicon powder and alumina powder, waters the Al of material feeding 2O 3Content is 40～50%.The shortcoming that exists is Al 2O 3Content is on the low side, connects now to water the stove number and be and improve trend year by year, is generally 7～8 stoves, higher more than 10～12 stoves, and there is ladle roughing slag in the beam district, and the working lining magnesia coating is difficult to resist the high slag line erosion of watering the stove number under that connects, particularly the slag line permanent liner in beam district can suffer erosion, above-mentioned Al 2O 3Content obviously can not satisfy erosion-resistant requirement.And, with clay and high alumina be main material water its thermal shock resistance of material feeding certainly not as being the material feeding of watering of main material with the mullite.Aggregate adopts cheap not erosion resistant clay, and matrix adopts expensive alumina powder, and material fit is unreasonable.
Because the thermal shock resistance and the volume stability of existing basket pouring material are relatively poor, in the use, produce cracking at the bottom of external corner, Bao Bi and the bag and peel off, restricted the raising in service life.
Summary of the invention
The object of the invention is to provide a kind of raising to water the thermal shock resistance of material feeding, and takes into account volume stability and intensity, thereby prolongs the continuous casting tundish permanent liner tundish material for permanent liner in pouring in service life.
For reaching above-mentioned purpose, tundish material for permanent liner in pouring of the present invention includes aggregate, base-material and additive, and its each composition weight percentage composition is:
Alumina level mullite 30～75%
Mullite 3～67%
Silicon powder 1.5～5%
Cement≤3%
Steel fibre 0.1～3%
Tundish material for permanent liner in pouring of the present invention, also further comprise in kyanite 1.5～5%, the silica 0～5% wherein one or both;
Al in the wherein said alumina level mullite 2O 3Content is 60～80%, critical particle 〉=5mm;
Wherein said mullite is meant mullite fine powder 0～42% and mullite ultra micro powder 3～25%;
Al in the wherein said cement 2O 3Content is 60～80%;
Tundish material for permanent liner in pouring of the present invention, the position of having relatively high expectations applicable to thermal shock resistances such as tundish permanent liner, tundish clad, tap hole of iron-mixing bogie and heating furnaces.
In order to prolong the service life of tundish material for permanent liner in pouring, the present invention mainly is conceived to improve the thermal shock resistance that waters material feeding, keeps volume stability and enough intensity.
The damage of tundish material for permanent liner in pouring mainly is because the cold and hot repeatedly effect of tundish causes, and therefore pays attention to improving watering the thermal shock resistance and the volume stability of material feeding, and the most important thing is to improve thermal shock resistance.
Al with down-draft kiln production 2O 3Content replaces the secondary alumina that performance is inhomogeneous and impurity is high, I level and high grade bauxite, the corundum raw material now produced with the used cured stone of product, flint clay, shaft furnace at 60-80%, alumina level mullite that impurity content is lower.Cured stone and flint clay are because of Al 2O 3Content is low to be influenced its erosion resisting and should not use, high grade bauxite and corundum thermal shock resistance are relatively poor, impurity height, uneven components and the unstable properties of the secondary alumina that shaft furnace is produced, the alumina level mullite that the down-draft kiln that the present invention adopts is produced, have sinter that water absorption rate is low, impurity content is lower, the characteristics of stable performance, cheap, good thermal shock.The alumina level mullite (mullite content is about 75%) of selecting for use the low down-draft kiln of good thermal shock, cost to produce is a characteristic of the present invention as main material.Requiring for alumina level mullite in the present invention is Al 2O 3Content is 60～80%, Fe 2O 3＜1.0%, water absorption rate＜3.5%, particle volume density＞2.75g/cm 3Replace existing secondary alumina and the andalusite raw material of producing with the used flint clay of basket pouring material, high grade bauxite, shaft furnace with this material, make the stable performance and the raising of watering material feeding, cost also descends simultaneously.
Suitably reduce SiO 2Powder content (general silicon ash is 3～6%, and the silicon ash content of basket pouring material of the present invention is 2～3%) can significantly weaken the sintering that infiltration caused owing to ektogenic, thereby improve erosion-resisting characteristics and antistrip performance;
Optimize granularmetric composition: critical particle is increased to 20mm from 5mm, strengthen critical particle size and increase the raising that oarse-grained ratio all helps thermal shock resistance.
It is main that matrix is selected mullite for use, by mullite fine powder and mullite ultra micro powder is formed, its grade is higher than aggregate raw material.Fine powder adopts natural mullite or mullite synthesizing, and adopts mullite ultra micro powder.Like this, both guaranteed that matrix was mainly the mullite composition, and improved and water the thermal shock resistance of material feeding that the ultra micro powder can be guaranteed to water material feeding again and adopt the ultra-low cement combination technology, improves the intensity of watering material feeding.Requirement to mullite miropowder is Al 2O 3Content 68～72%, SiO 2Content 26～31%, granularity d 50Be 0.1～10 μ m.Creep rate be can reduce like this, thermal shock resistance and antistrip performance improved, and, mullite miropowder and Al 2O 3Micro mist is compared, and cost also significantly descends.
Improve volume stability.Tangible contraction has all appearred after 1000 ℃ and 1400 ℃ burnings of comparative example.Example has added a certain amount of kyanite, silica, by they crystal transfer and the expansion that produced of reaction to remedy material contraction at high temperature, can reduce like this and shrink the crackle that produces.
Reduce the steel fibre addition.The steel fibre addition of general basket pouring material is 2～4%, and on the one hand, the thermal coefficient of expansion of steel fibre is more much bigger than refractory material; On the other hand, under the high temperature, steel fibre generates iron oxide, and iron oxide has promoted the generation and the sintering of cast feed liquid phase, thereby has reduced thermal shock resistance, waters material feeding and peels off easily.And the stainless steel fibre addition of basket pouring material of the present invention is controlled at below 3%, thereby has improved thermal shock resistance, anti-strip and the volume stability that waters material feeding.
The specific embodiment
Embodiment
Table 1, table 2 have been listed the proportioning and the performance of embodiments of the invention and comparative example respectively.The contraction of comparative example 1 and comparative example 2 is big (because of there being certain impurity content in the raw material), occur big crackle after the thermal shock, and remaining compressive resistance is lower.Comparative example 1 is because the Al of main material flint clay 2O 3Content is on the low side, and erosion-resisting characteristics is poor, so slag penetration resistance is very poor.Though comparative example 2 is because high Al 2O 3The existence of the high grade bauxite of content make that the slag penetration resistance that waters material feeding is better, but thermal shock resistance is poor, can not meet the demands.Embodiment 1～3, though Al 2O 3The content difference, but because to have guaranteed primary raw material be that mullite is formed, and enough ultra micro powder amounts, the ultra-low cement combination, so thermal shock resistance is obviously better.And because therefore alumina level mullite and the fused mullite raw material sinters, composition is even, impurity content is low shrinks less.Embodiment 4～6, owing to added kyanite and silica, contraction further reduces, controlled volume stability better, and embodiment 4 and embodiment 5 increased critical particle size, so crackle is more tiny after the thermal shock, residual strength is higher, has further improved the thermal shock resistance that waters material feeding.The critical particle of embodiment 6 is less, is applicable to that some critical particle can not very big position.
Table 1 waters the proportioning (wt%) of material feeding
Project Comparative example 1 Comparative example 2 Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4 Embodiment 5 Embodiment 6
Water the Al of material feeding 2O 3Content ????63.9 ????82.2 ???65.8 ???69.7 ???72.7 ???71.4 ???69.1 ???72.0
Flint clay 5-0.088mm ????61
High grade bauxite 8-0.088mm＜0.088mm ? ????13 ????70 ????15
Alumina level mullite 20-0.088mm 10-0.088mm 5-0.088mm ? ? ???33 ? ? ???62 ? ? ???84 ? ???71 ? ???68 ? ? ???71.5
Mullite synthesizing fine powder 3-0.088mm＜0.088mm ? ???31 ???11 ? ???9 ???15 ? ? ???14 ? ? ???14 ? ? ???14
Silicon powder ????4 ????3 ????2 ????2 ????2 ???2 ????2 ???2
Alumina powder ????5
Mullite ultra micro powder ????5 ????8 ????8 ????8 ???7 ????7 ???7
Andalusite (3-0mm) ????10
Kyanite (＜100 order) ???3 ????2 ???2
Silica (＜180 order) ????3
A70 cement ????5 ????5 ????3 ????3 ????3 ???3 ????3 ???3
Steel fibre ????2 ????2 ????1 ????1 ????1 ???1 ????1 ???0.5
Amount of water ????5.4 ????5.0 ????5.0 ????5.2 ????5.2 ????5.2 ????5.2 ????5.2
Table 2 waters the performance of material feeding
Project Embodiment 1 Embodiment 2 Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4 Embodiment 5 Embodiment 6
Burn the back line and change (%) 1000℃ ×3h ????-0.2 ????-0.2 ????-0.2 ???-0.2 ????-0.2 ????-0.1 ????-0.1 ????-0.1
1400℃ ×3h ????-0.4 ????-0.3 ????-0.1 ???-0.1 ????-0.1 ????+0.1 ????0 ????0
1200 ℃ → water-cooled of thermal shock resistance 26 times The crackle situation Big crackle Big crackle Crackle Crackle Crackle Hair check Hair check Hair check
Remaining withstand voltage (MPa) ????50.4 ????52.5 ????75.5 ???72.8 ???＞78 ????＞78 ????＞78 ????＞78
Anti-slag penetration index ????100 ????56 ????61 ????66 ???69 ????67 ????64 ????65
The effect of invention
Material feeding thermal shock resistance＞50 time of watering of the present invention, and the material feeding of watering of comparative example has only 20～30 times; 800 ℃～1500 ℃ sintering strengths are up to more than the 120MPa, and volume stability is good (to be burnt the back line and change in ± 0.1% thermal coefficient of expansion≤4 * 10 -6/ ℃), slag penetration resistance is superior.Water material feeding as the tundish material for permanent liner in pouring with this, crackle can obviously reduce, and peels off thereby can significantly alleviate, and anti-erosion also can significantly be improved.Expectation will improve more than 40% in service life on the tundish.
With the material feeding of watering of watering the present heating of material feeding replacement furnace lining of the present invention, not only can significantly improve service life, but also cost is significantly descended.Of the present inventionly water material feeding and be used in tundish and cover, prediction can reach more than 150 times service life.

Claims (6)

1. the tundish material for permanent liner in pouring includes aggregate, base-material and additive, it is characterized in that, its each constituent content is: below be weight percent,
Alumina level mullite 30～75%
Mullite 3～67%
Silicon powder 1.5～5%
Cement≤3%
Steel fibre 0.1～3%.
2. tundish material for permanent liner in pouring as claimed in claim 1 is characterized in that, also further comprise in kyanite 1.5～5%, the silica 0～5% wherein one or both.
3. tundish material for permanent liner in pouring as claimed in claim 1 or 2 is characterized in that, Al in the wherein said alumina level mullite 2O 3Content is 60～80%, critical particle 〉=5mm.
4. tundish material for permanent liner in pouring as claimed in claim 1 or 2 is characterized in that, wherein said mullite is meant mullite fine powder 0～42% and mullite ultra micro powder 3～25%.
5. tundish material for permanent liner in pouring as claimed in claim 1 or 2 is characterized in that, Al in the wherein said cement 2O 3Content is 60-80%.
6. tundish material for permanent liner in pouring as claimed in claim 1 or 2 is characterized in that, wherein saidly waters material feeding and is used for the position that tundish permanent liner, tundish clad, tap hole of iron-mixing bogie and heating furnace thermal shock resistance are had relatively high expectations.
CN 01132037 2001-10-29 2001-10-29 Pouring material for permanent liner in pouring basket Expired - Fee Related CN1223421C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 01132037 CN1223421C (en) 2001-10-29 2001-10-29 Pouring material for permanent liner in pouring basket

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 01132037 CN1223421C (en) 2001-10-29 2001-10-29 Pouring material for permanent liner in pouring basket

Publications (2)

Publication Number Publication Date
CN1415446A true CN1415446A (en) 2003-05-07
CN1223421C CN1223421C (en) 2005-10-19

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Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1590345A (en) * 2003-09-02 2005-03-09 北京瑞泰高温材料科技股份有限公司 High volume stabilized aluminium silicon series ultralow cement fire proofing pouring material
CN100351209C (en) * 2005-11-03 2007-11-28 武汉钢铁(集团)公司 Refractory pouring material used for melten iron desulfur agitator
CN101805198A (en) * 2010-04-29 2010-08-18 巩义市科恒耐火材料有限公司 Mullite steel fiber castable
CN101921130A (en) * 2010-09-04 2010-12-22 潘起雄 Corundum-mullite crucible
CN101020334B (en) * 2006-12-31 2011-01-05 西安重型机械研究所 Integral pouring system for refractory lining of pouring basket
CN101293778B (en) * 2008-06-25 2011-03-23 河南省耕生耐火材料有限公司 Pouring material for air guide wall for vertical furnace and prefabricated component
CN101240125B (en) * 2008-02-04 2011-08-10 洛阳科耐高温材料有限公司 High-temperature wearable composite dope for electric power boiler flue
CN102161212A (en) * 2011-01-18 2011-08-24 北京利尔高温材料股份有限公司 Method for manufacturing low-cost slag blocking dam
CN102276263A (en) * 2011-04-28 2011-12-14 河南鑫诚耐火材料股份有限公司 Manufacturing method of seal cover for operation observation aperture on carbon calciner fire wall
CN102503486A (en) * 2011-11-07 2012-06-20 宜兴市泰科耐火材料有限公司 Pouring material for maintaining steel fiber-reinforced cement kiln
CN102672154A (en) * 2012-04-17 2012-09-19 莱芜钢铁集团有限公司 Continuous-casting tundish comprehensive permanent liner and preparation method thereof
CN103008632A (en) * 2012-11-27 2013-04-03 浙江铭德新材科技有限公司 Split combined type tundish cover and manufacturing method thereof
CN106495717A (en) * 2016-10-27 2017-03-15 北京利尔高温材料股份有限公司 A kind of environment-friendly type KR agitator castable
CN107140999A (en) * 2017-06-02 2017-09-08 湖州知维技术服务有限公司 A kind of industrial kiln recycling type basket pouring material
CN107140998A (en) * 2017-06-02 2017-09-08 湖州知维技术服务有限公司 Industrial kiln recycling type basket pouring material and its preparation technology
CN107759212A (en) * 2017-11-01 2018-03-06 安徽马钢耐火材料有限公司 A kind of middle clad mullite castable and its production method
CN108503373A (en) * 2017-02-27 2018-09-07 宝山钢铁股份有限公司 Blast furnace taphole reparation castable refractory
CN108530089A (en) * 2017-03-02 2018-09-14 上海安可科技股份有限公司 Castable refractory and burning nozzle for heating intermediate ladle for burning nozzle for heating intermediate ladle
CN108975930A (en) * 2018-09-07 2018-12-11 云南濮耐昆钢高温材料有限公司 A kind of lower shrinkage steel flat flanges enhancing castable
CN110256090A (en) * 2019-06-24 2019-09-20 武汉钢铁有限公司 A kind of tundish permanent layer lightweight insulated pouring material
CN110467472A (en) * 2019-08-27 2019-11-19 北京利尔高温材料股份有限公司 A kind of continuous casting production permanent layer castable

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1590345A (en) * 2003-09-02 2005-03-09 北京瑞泰高温材料科技股份有限公司 High volume stabilized aluminium silicon series ultralow cement fire proofing pouring material
CN100351209C (en) * 2005-11-03 2007-11-28 武汉钢铁(集团)公司 Refractory pouring material used for melten iron desulfur agitator
CN101020334B (en) * 2006-12-31 2011-01-05 西安重型机械研究所 Integral pouring system for refractory lining of pouring basket
CN101240125B (en) * 2008-02-04 2011-08-10 洛阳科耐高温材料有限公司 High-temperature wearable composite dope for electric power boiler flue
CN101293778B (en) * 2008-06-25 2011-03-23 河南省耕生耐火材料有限公司 Pouring material for air guide wall for vertical furnace and prefabricated component
CN101805198A (en) * 2010-04-29 2010-08-18 巩义市科恒耐火材料有限公司 Mullite steel fiber castable
CN101805198B (en) * 2010-04-29 2011-07-06 巩义市科恒耐火材料有限公司 Mullite steel fiber castable
CN101921130A (en) * 2010-09-04 2010-12-22 潘起雄 Corundum-mullite crucible
CN102161212B (en) * 2011-01-18 2013-06-05 北京利尔高温材料股份有限公司 Method for manufacturing low-cost slag blocking dam
CN102161212A (en) * 2011-01-18 2011-08-24 北京利尔高温材料股份有限公司 Method for manufacturing low-cost slag blocking dam
CN102276263B (en) * 2011-04-28 2013-06-12 河南鑫诚耐火材料股份有限公司 Manufacturing method of seal cover for operation observation aperture on carbon calciner fire wall
CN102276263A (en) * 2011-04-28 2011-12-14 河南鑫诚耐火材料股份有限公司 Manufacturing method of seal cover for operation observation aperture on carbon calciner fire wall
CN102503486A (en) * 2011-11-07 2012-06-20 宜兴市泰科耐火材料有限公司 Pouring material for maintaining steel fiber-reinforced cement kiln
CN102672154B (en) * 2012-04-17 2014-01-15 莱芜钢铁集团有限公司 Continuous-casting tundish comprehensive permanent liner and preparation method thereof
CN102672154A (en) * 2012-04-17 2012-09-19 莱芜钢铁集团有限公司 Continuous-casting tundish comprehensive permanent liner and preparation method thereof
CN103008632A (en) * 2012-11-27 2013-04-03 浙江铭德新材科技有限公司 Split combined type tundish cover and manufacturing method thereof
CN103008632B (en) * 2012-11-27 2014-10-22 浙江铭德新材科技有限公司 Split combined type tundish cover and manufacturing method thereof
CN106495717A (en) * 2016-10-27 2017-03-15 北京利尔高温材料股份有限公司 A kind of environment-friendly type KR agitator castable
CN106495717B (en) * 2016-10-27 2019-11-29 北京利尔高温材料股份有限公司 A kind of environment-friendly type KR blender castable
CN108503373A (en) * 2017-02-27 2018-09-07 宝山钢铁股份有限公司 Blast furnace taphole reparation castable refractory
CN108530089A (en) * 2017-03-02 2018-09-14 上海安可科技股份有限公司 Castable refractory and burning nozzle for heating intermediate ladle for burning nozzle for heating intermediate ladle
CN108530089B (en) * 2017-03-02 2021-08-06 上海安可科技股份有限公司 Refractory castable for tundish baking burner and tundish baking burner
CN107140998A (en) * 2017-06-02 2017-09-08 湖州知维技术服务有限公司 Industrial kiln recycling type basket pouring material and its preparation technology
CN107140999A (en) * 2017-06-02 2017-09-08 湖州知维技术服务有限公司 A kind of industrial kiln recycling type basket pouring material
CN107759212A (en) * 2017-11-01 2018-03-06 安徽马钢耐火材料有限公司 A kind of middle clad mullite castable and its production method
CN108975930A (en) * 2018-09-07 2018-12-11 云南濮耐昆钢高温材料有限公司 A kind of lower shrinkage steel flat flanges enhancing castable
CN110256090A (en) * 2019-06-24 2019-09-20 武汉钢铁有限公司 A kind of tundish permanent layer lightweight insulated pouring material
CN110256090B (en) * 2019-06-24 2022-04-29 武汉钢铁有限公司 Lightweight thermal insulation castable for permanent layer of tundish
CN110467472A (en) * 2019-08-27 2019-11-19 北京利尔高温材料股份有限公司 A kind of continuous casting production permanent layer castable

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