CN1283589C - Refractory material in use for continuous casting and usage - Google Patents
Refractory material in use for continuous casting and usage Download PDFInfo
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- CN1283589C CN1283589C CN 200410053219 CN200410053219A CN1283589C CN 1283589 C CN1283589 C CN 1283589C CN 200410053219 CN200410053219 CN 200410053219 CN 200410053219 A CN200410053219 A CN 200410053219A CN 1283589 C CN1283589 C CN 1283589C
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Abstract
The present invention relates to refractory material, particularly to refractory material which is used for a manufacturing anti-blockage immersed nozzle anti-blockage lining in the continuous casting production, which solves the present defects of alumina blockage, molten steel corrosion and poor anti-thermal shock performance which are easily generated. The continuous casting refractory material has the percentage by weight of the components of zirconium mullite of which the percentage by weight is from 30 to 80 percent, beta-sialon of which the percentage by weight is from 5 to 40 percent, and one or a plurality of kinds of aluminum oxide, fused quartz, silicon carbide, metallic silicon and boron carbide with the percentage by weight is from 0 to 30 percent; additionally, a binding agent is one or a plurality of kinds of phenolic resin, aluminum dihydrogen phosphate and silica sol and has the percentage by weight of 4 to 8 percent. The present invention is used for continuous casting steel, particularly the aluminum-killed steel with high aluminum content, and can effectively avoid the nozzle blockage caused by the aluminum adhesion in the steel melt.
Description
Technical field: the present invention relates to refractory materials, particularly a kind of refractory materials that is used to make anti-clogging plug submerged nozzle anti-clogging plug liner in continuous casting production.
Background technology: existing aluminium carbonaceous submerged nozzle also can produce latch up phenomenon in the casting process except the machinery damage and deteriorating.Particularly when cast aluminum killed steel, Al in the Chang Yingang liquid
2O
3Be deposited on mouth of a river inwall and stop up Deng inclusion, and have influence on working continuously of continuous casting.Stick to the inclusion of mouth of a river internal surface simultaneously, in casting cycle, may come off and fall in the molten steel, cause the nonmetal inclusion in the continuously cast bloom, thereby influence the quality of continuous casting steel billet.Be easy to generate the position adhered to of deposition in the mouth of a river and mainly comprise following inwall of submerged nozzle slag line and discharge opening position on every side.
In order to prevent nozzle clogging, mainly now adopt following several modes, 1, the Puffer type mouth of a river, argon gas is to force to be blown into by the ventilative lining at the mouth of a river, forms a layer of inert on the inner hole wall of the mouth of a river, has stoped aluminum oxide to adhere to.Though can alleviate nozzle clogging to a certain extent, there is the problem that billet quality is worsened in blowing argon gas in the mouth of a river, and promptly in the slab process of setting, makes the defective of steel formation pinprick owing to the Decomposition of argon gas.
2, the sub-mouth of a river of the notch cuttype mouth of a river and eddy flow, the inwall at the notch cuttype mouth of a river can change molten steel flow state in the mouth of a river after adopting notch cuttype, thereby improves the aluminum oxide latch up phenomenon; Also the molten steel flow state reduces the aluminum oxide obstruction in the mouth of a river by changing at the eddy flow mouth of a river.Water under the high situation of number of times for connecting, these two kinds of mouth of a river blocking-proof results can't meet the demands.Secondly, there is the big problem of manufacture difficulty in the notch cuttype mouth of a river.
3, the anti-clogging plug inwall mouth of a river, Japanese patent laid-open 4-224061 has proposed CaO-ZrO
2-C inner lining material.Chinese patent CN 1062248C discloses the material that a kind of anti-oxidation aluminium stops up, and promptly adds Calcium Fluoride (Fluorspan) in zirconium carbon material or zirconium mullite carbon material.These two kinds of patents all be utilize aluminum oxide easily with inner lining material in CaO or Calcium Fluoride (Fluorspan) reaction formation eutectic, reach the purpose that prevents alumina deposit.Along with the prolongation of pouring time, anti-clogging plug poor effect, secondly CaO-ZrO
2There is the problem of easy aquation in-C inner lining material.The Japanese Patent spy opens 2003-145265 and proposes a kind of carbon-free Al
2O
3-MgO matter anti-clogging plug inner lining material.This patent adopts the inner lining material of low heat conduction, can reduce the roughening with inner lining surface of separating out of steel grade aluminum oxide, stops up thereby reduce aluminum oxide.But still there is the problem of anti-thermal shock difference in this kind material, can not satisfy service requirements fully.About Al in the aluminium carbonaceous submerged nozzle
2O
3The deposition adhesion mechanism, different investigators' description is not quite similar, but is consistent in following view on some.(1) high thermal conductivity of mouth of a river refractory materials can impel separating out of oxide compound in the molten steel and in the deposition of mouth of a river inner-wall surface; (2) dead angle that the molten steel bias current is caused in the mouth of a river and molten steel can promote also that to the chemical wettability of the mouth of a river liner oxide compound is in the deposition of mouth of a river inner-wall surface in the molten steel; (3) redox reaction of each component provides oxygen source for molten steel in the ventilation property at the mouth of a river and the mouth of a river refractory materials, thereby has promoted the oxidation of metallic aluminium in the molten steel, and then causes in the molten steel deoxidation products in the deposition of mouth of a river inner-wall surface; (4) the decarburization roughening of refractory surface also helps in the molten steel oxide compound in the deposition of mouth of a river inner-wall surface.Al from the mouth of a river
2O
3The deposition adhesion mechanism can know since high content of graphite cause the high thermal conductivity at the mouth of a river and easily decarburization be the one of the main reasons that causes nozzle clogging.
Summary of the invention: the purpose of this invention is to provide a kind of refractory for continuous casting and uses thereof, solve the technical problem that submerged nozzle is easy to generate aluminum oxide obstruction, molten steel erosion and thermal shock resistance difference.It is being used for continuous casting steel, and particularly the high aluminium killed steel of aluminum content can prevent effectively that aluminium adheres to the nozzle clogging that causes in the molten steel, and the life-span is quite long.Technical scheme of the present invention is: a kind of refractory for continuous casting, adopting zirconium mullite material, β-sialon material is main raw material, can also add a kind of in refractory materials aluminum oxide commonly used, fused quartz, silicon carbide, Pure Silicon Metal, the norbide or several.The weight percentage of refractory for continuous casting moiety is as follows:
Zirconium mullite: 30～80%
β-Sai Long: 5～40%
A kind of in aluminum oxide, fused quartz, silicon carbide, Pure Silicon Metal, the norbide or several 0～30%
Add wedding agent: resol, aluminium dihydrogen phosphate, silicon sol a kind of or several 4～8%.
Manufacture method is: adopting zirconium mullite, β-Sai Long is main raw material, and adopting a kind of of resol, aluminium dihydrogen phosphate, silicon sol or several is wedding agent.Compound through the granulation of routine, dry back and aluminium carbon body, zirconium carbon slag line, with sintering behind the isostatic pressing, promptly can be made into required submerged nozzle.
Among the present invention, adopting zirconium mullite, β-Sai Long is main raw material, and resol etc. are the prepared anti-clogging plug liner submerged nozzle of wedding agent, has higher antioxidation aluminium deposition and thermal shock resistance.Zirconium mullite material and β-sialon material all have excellent thermal shock resistance and splendid anti-molten steel erosion performance.With zirconium mullite, β-Sai Long is that the carbon-free inner lining material of main raw material has low thermal conductivity and high thermal shock resistance, and it can prevent effectively that when cast aluminum killed steel aluminium adheres to the nozzle clogging that causes in the molten steel, and the life-span is quite long.
The invention has the beneficial effects as follows: compare with the air blowing mouth of a river, the air blowing mouth of a river forms the defective of pinprick owing to the Decomposition of argon gas makes steel in the slab process of setting, and submerged nozzle of the present invention can not produce and have the problem that billet quality is worsened.Compare with the sub-mouth of a river of staged and eddy flow, the anti-clogging plug effect is better, and manufacture difficulty is little.Same CaO-ZrO
2The zirconium mullite carbon inner lining material of-C inner lining material or interpolation Calcium Fluoride (Fluorspan) is compared, and the anti-clogging plug effect is better, and the life-span is longer.With carbon-free Al
2O
3-MgO matter anti-clogging plug inner lining material is compared, and thermal shock resistance is better, and mouth of a river casualty ratio of accidents is low.With this refractory materials as the submerged nozzle of anti-clogging plug liner stop up at antioxidation aluminium, thermal shock resistance is splendid.It is being used for continuous casting steel, and particularly the high aluminium killed steel of aluminum content can prevent effectively that aluminium adheres to the nozzle clogging that causes in the molten steel.
Embodiment:
The weight percentage and the characteristic of embodiment 1-6 anti-clogging plug submerged nozzle of the present invention inner lining material composition see Table 1, and table 2 has been listed the weight percentage and the characteristic of comparative example composition.
Composition of table 1 present embodiment (weight percentage) and characteristic
| The prescription number | 1 | 2 | 3 | 4 | 5 | 6 | |
| Raw material is formed (%) | Zirconium mullite | 75 | 75 | 65 | 55 | 45 | 35 |
| β-Sai Long | 25 | 10 | 20 | 20 | 25 | 35 | |
| Fused quartz | 9 | 5 | 10 | 6 | - | ||
| Aluminum oxide | - | 4 | 9 | 20 | - | ||
| Silicon carbide | 3 | 2 | 2 | 1 | 2 | ||
| B 4C | 1 | 1 | 1 | 0.5 | 2 | ||
| Si | 2 | 3 | 3 | 2.5 | 2 | ||
| Aluminium dihydrogen phosphate (adding) | 2 | 2 | 2 | 3 | |||
| Silicon sol (adding) | 6 | 2 | 2 | 2 | |||
| Resol (adding) | 5 | 3 | 4 | 4 | |||
| Performance | Apparent pore, % | 17 | 18 | 17 | 18 | 18 | 16 |
| Compressive strength, MPa | 18 | 20 | 22 | 23 | 19 | 21 | |
| Folding strength, MPa | 4.7 | 5.3 | 5.2 | 5.6 | 4.8 | 5.1 | |
| The anti-clogging plug effect | Excellent | Excellent | Excellent | Excellent | Excellent | Excellent | |
| Heat-shock resistance | Excellent | Excellent | Excellent | Excellent | Excellent | Excellent | |
| Work-ing life | Long | Long | Long | Long | Long | Long | |
| Shelf lives | Long | Long | Long | Long | Long | Long | |
The composition (weight percentage) and the characteristic of other anti-clogging plug inner lining material of table 2
| ZrO 2-CaO-C | ZrO 2-CaF 2-C | Al 2O 3-MgO | |
| ZrO 2 | 40～50 | 68 | - |
| CaO | 10～30 | 2 | - |
| Graphite | 15-20 | 18 | - |
| Al 2O 3 | - | - | 80～85 |
| MgO | - | - | 5～10 |
| CaF 2 | - | 17 | - |
| Apparent pore, % | 19 | 16 | 16～18 |
| Compressive strength, MPa | 24.6 | 24.8 | - |
| Folding strength, MPa | 6.5 | 6.0 | - |
| Thermal shock resistance | Excellent | Excellent | In |
| The anti-clogging plug effect | In | In | Excellent |
| Work-ing life | In | In | Long |
| Shelf lives | Short | Long | Long |
Estimate feasibility and prospect that invention is promoted: nozzle clogging is a problem of puzzlement steel mill always.Carbon-free anti-clogging plug liner is to solve the effective means that submerged nozzle stops up.
Claims (2)
1, a kind of refractory for continuous casting, the weight percentage of its moiety is as follows:
Zirconium mullite: 30～80%
β-Sai Long: 5～40%
A kind of in aluminum oxide, fused quartz, silicon carbide, Pure Silicon Metal, the norbide or several 0～30%;
Add the weight percentage of wedding agent: resol, aluminium dihydrogen phosphate, silicon sol a kind of or several 4～8%.
2, the described refractory for continuous casting of claim 1 is used to make the application of anti-clogging plug submerged nozzle anti-clogging plug liner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410053219 CN1283589C (en) | 2004-07-28 | 2004-07-28 | Refractory material in use for continuous casting and usage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410053219 CN1283589C (en) | 2004-07-28 | 2004-07-28 | Refractory material in use for continuous casting and usage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1727309A CN1727309A (en) | 2006-02-01 |
| CN1283589C true CN1283589C (en) | 2006-11-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200410053219 Expired - Fee Related CN1283589C (en) | 2004-07-28 | 2004-07-28 | Refractory material in use for continuous casting and usage |
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Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100369866C (en) * | 2006-07-24 | 2008-02-20 | 孙邢哲 | Heat repairing quartzy material and its usage |
| CN101337820B (en) * | 2008-08-15 | 2012-07-04 | 上海宝明耐火材料有限公司 | Locked coil rope fire-resistant material for continuous casting tundish crystallizer dummy ingot head and method for preparing same |
| FR2953512B1 (en) * | 2009-12-09 | 2017-03-31 | Saint Gobain Centre De Rech Et D'etudes Europeen | REFRACTORY PRODUCT WITH DIA BORE SIAION MATRIX |
| CN102336573B (en) * | 2010-07-26 | 2013-05-29 | 宝山钢铁股份有限公司 | Aluminum titanate-sialon-silicon carbide composite molten steel feeding port, and manufacturing method thereof |
| CN102391005A (en) * | 2011-08-03 | 2012-03-28 | 河北联合大学 | Impacted slurry material used for repairing blast furnace body cracks, and preparation method thereof |
| CN102432314B (en) * | 2011-09-15 | 2013-01-30 | 华耐国际（宜兴）高级陶瓷有限公司 | Special additive, energy-efficient continuous casting refractory material containing additive, and preparation technology of refractory material |
| CN105537575A (en) * | 2012-08-06 | 2016-05-04 | 沈光辉 | Integral lining of continuous casting tundish |
| CN103204688A (en) * | 2013-04-11 | 2013-07-17 | 湖南华科机械有限公司 | Novel refractory material for aluminum smelting industry and preparation method of novel refractory material |
| CN103351168B (en) * | 2013-05-10 | 2014-08-13 | 郑州瑞泰耐火科技有限公司 | Novel mullite brick and preparation method thereof |
| CN106588005B (en) * | 2016-10-25 | 2020-08-25 | 江苏嘉耐高温材料股份有限公司 | Refractory material for homogeneous slag-stopping ball for continuous casting ladle and method for manufacturing slag-stopping ball by using refractory material |
| CN107252886A (en) * | 2017-06-08 | 2017-10-17 | 中钢集团洛阳耐火材料研究院有限公司 | A kind of long nozzle for continuous casting inner lining material |
| CN107892569B (en) * | 2017-11-21 | 2020-08-28 | 淄博双马新材料科技股份有限公司 | Composite submerged nozzle lining material for continuous casting |
| CN110293219B (en) * | 2019-06-28 | 2020-10-30 | 中天钢铁集团有限公司 | Method for reducing large-size calcium aluminate inclusion in steel |
| CN110963810A (en) * | 2019-12-30 | 2020-04-07 | 长兴兴鹰新型耐火建材有限公司 | Zirconium-mullite castable for waste incineration kiln and preparation process thereof |
| CN113277861B (en) * | 2021-05-18 | 2022-06-21 | 江苏泰瑞耐火有限公司 | Refractory material for submerged nozzle and application thereof |
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Granted publication date: 20061108 Termination date: 20160728 |