CN101096311A - Immersion type water gap noumenon material containing calcium oxide - Google Patents
Immersion type water gap noumenon material containing calcium oxide Download PDFInfo
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- CN101096311A CN101096311A CNA2006100282501A CN200610028250A CN101096311A CN 101096311 A CN101096311 A CN 101096311A CN A2006100282501 A CNA2006100282501 A CN A2006100282501A CN 200610028250 A CN200610028250 A CN 200610028250A CN 101096311 A CN101096311 A CN 101096311A
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- calcium oxide
- river
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- submerged nozzle
- aluminium
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Abstract
The invention discloses an immersing nozzle bulk material with calcium oxide, which comprises the following parts: 5-70% one or two of wollastonite and calcium titanate, 10-30% graphite, 5-60% one or two of fused magnesia sand and spinel and 2-10% one or more of carborundum, silicon metal and boron carbide. The invention is fit for fusing aluminium killed-steel with high aluminium quantity, which prevents block for nozzle due to aluminium effectively.
Description
Technical field: the present invention relates to a kind of submerged nozzle bulk material, particularly a kind of submerged nozzle bulk material that contains calcium oxide.With this refractory materials as the submerged nozzle of bulk material stop up at antioxidation aluminium, thermal shock resistance is splendid.It is being used for continuous casting steel, when aluminium killed steel that particularly aluminum content is high is smelted, can prevent effectively in the molten steel that aluminium adheres to the mouth of a river of the causing hole plug that spues.
Background technology: 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 spue the hole and stop up Deng inclusion, and have influence on working continuously of continuous casting.Stick to mouth of a river internal surface simultaneously and the inclusion in the hole that spues, 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.
The submerged nozzle bulk material adopts aluminium carbon material (CN 02135497) usually, is main raw material with corundum, fused quartz and graphite, has good thermal shock resistance and anti-molten steel scouring aggressiveness.The hole site can produce the latch up phenomenon of ubi supra but this mouth of a river spues when cast aluminum killed steel.
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 (in the slab process of setting, making the defective of steel formation pinprick owing to the Decomposition of argon gas) that billet quality is worsened in blowing argon gas in the mouth of a river.
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 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.CaO-ZrO wherein
2It is raw material that-C material mainly adopts high temperature synthetic calcium zirconate, and calcium zirconate materials theory calcium oxide content only is 31.2%, and has shortcomings such as price height, thermal shock performance difference.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.Though but this kind material can solve the blockage problem of mouth of a river inwall, can not solve the submerged nozzle hole plug problem that spues.
Summary of the invention: the purpose of this invention is to provide a kind of prevent submerged nozzle spue hole plug bulk material and adopt the submerged nozzle of this body, it has, and splendid antioxidation aluminium stops up, anti-molten steel corrodes and thermal shock resistance.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 hole plug that spues that causes in the molten steel, and the life-span is quite long.Mainly solve the spue technical problem of hole plug of submerged nozzle.Technical scheme of the present invention is: a kind of submerged nozzle bulk material that contains calcium oxide, and the weight percent proportioning of its moiety is:
In wollastonite and the calcium titanate one or both: 5～70%
Graphite: 10～30%
In electrosmelted magnesite clinker and the spinel one or both: 5～60%
A kind of in silicon carbide, Pure Silicon Metal, the norbide or several: 2～10%.
Wherein calcium oxide content is greater than 40% in the wollastonite, and calcium oxide content is greater than 35% in the calcium titanate.
Add the wedding agent resol that accounts for bulk material weight 4～8% again at the making submerged nozzle.When carrying out the submerged nozzle making, in employing wollastonite and the calcium titanate material one or both and graphite are main raw material, all the other also add a kind of or several compositions in the materials such as electrosmelted magnesite clinker, spinel, silicon carbide, Pure Silicon Metal, norbide, and employing resol is wedding agent.Compound through granulation, dry back and anti-clogging plug liner, zirconium carbon slag line, with sintering behind the isostatic pressing, promptly can be made into required submerged nozzle.
The invention has the beneficial effects as follows: adopting wollastonite or calcium titanate and graphite is main raw material, and resol is the prepared anti-clogging plug body submerged nozzle bulk material of wedding agent, has higher antioxidation aluminium deposition, the erosion of anti-molten steel and thermal shock resistance.Be rich in the wollastonite of calcium oxide and calcium titanate easily with molten steel in the low-melting calcium aluminate of alumina inclusion reaction generation.Employing is with the submerged nozzle of such material as body, and it can prevent effectively when cast aluminum killed steel in the molten steel that aluminium adheres to the mouth of a river of the causing hole plug that spues, and the life-span is quite long.Compare with the air blowing mouth of a river, 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
2-C inner lining material is compared, and the anti-clogging plug effect is better, and price is more cheap; The logical zirconium mullite carbon inner lining material of Calcium Fluoride (Fluorspan) and the carbon-free Al of adding
2O
3-MgO matter anti-clogging plug inner lining material is compared, and has solved the hole plug problem that spues.
Embodiment: embodiment of the invention 1-6 sees Table 1, and table 1 is listed the composition (weight percentage) and the characteristic of bulk material of the present invention, and wherein the theoretical calcium oxide content of wollastonite is 48%, and the theoretical calcium oxide content of calcium titanate is 41.2%.
The composition of table 1 embodiment (weight percentage) and characteristic
| The prescription number | 1 | 2 | 3 | 4 | 5 | 6 | |
| Raw material is formed (%) | Wollastonite | 40 | 55 | 20 | - | - | 5 |
| Calcium titanate | 30 | - | 20 | 25 | 10 | - | |
| Electrosmelted magnesite clinker | 6 | - | 15 | 19 | 15 | - | |
| Graphite | 20 | 24 | 15 | 10 | 20 | 30 | |
| Spinel | - | 15 | 21 | 40 | 50 | 60 | |
| Silicon carbide | - | 2 | 5 | 3 | 2 | 2 | |
| B 4C | 0.5 | 1 | 1 | 0.5 | 1 | 1 | |
| Si | 2.5 | 3 | 3 | 2.5 | 2 | 2 | |
| Resol (adding) | 6 | 7 | 7 | 5 | 7 | 7 | |
| Performance | Apparent porosity, % | 13 | 14 | 14 | 1 5 | 16 | 17 |
| Compressive strength, MPa | 24 | 28 | 27 | 25 | 23 | 24 | |
| Folding strength, MPa | 6.3 | 8.5 | 8.1 | 6.8 | 5.6 | 6.9 | |
| The anti-clogging plug effect | Excellent | Excellent | Excellent | Excellent | Very | Generally | |
| Heat-shock resistance | Excellent | Excellent | Very | Generally | Excellent | Excellent | |
| Work-ing life | Long | Long | Long | Long | Short | Short | |
Claims (2)
1, a kind of submerged nozzle bulk material that contains calcium oxide, the weight percent proportioning of its moiety is: one or both in wollastonite and the calcium titanate: 5～70%
Graphite: 10～30%
In electrosmelted magnesite clinker and the spinel one or both: 5～60%
A kind of in silicon carbide, Pure Silicon Metal, the norbide or several: 2～10%.
2, a kind of submerged nozzle bulk material that contains calcium oxide according to claim 1 is characterized in that wherein calcium oxide content is greater than 40% in the wollastonite, and calcium oxide content is greater than 35% in the calcium titanate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100282501A CN100447107C (en) | 2006-06-28 | 2006-06-28 | Immersion type water gap noumenon material containing calcium oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100282501A CN100447107C (en) | 2006-06-28 | 2006-06-28 | Immersion type water gap noumenon material containing calcium oxide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101096311A true CN101096311A (en) | 2008-01-02 |
| CN100447107C CN100447107C (en) | 2008-12-31 |
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ID=39010424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100282501A Expired - Fee Related CN100447107C (en) | 2006-06-28 | 2006-06-28 | Immersion type water gap noumenon material containing calcium oxide |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489696A (en) * | 2011-12-15 | 2012-06-13 | 北京利尔高温材料股份有限公司 | Oxide and non-oxide composite tundish nozzle |
| CN105985122A (en) * | 2015-02-28 | 2016-10-05 | 宝山钢铁股份有限公司 | Refractory material for submersed nozzle inner hole body |
| CN106986654A (en) * | 2017-03-28 | 2017-07-28 | 常州大学 | A kind of preparation method of slag corrosion resistance type refractory for continuous casting |
| CN107935611A (en) * | 2018-01-03 | 2018-04-20 | 武汉科技大学 | A kind of calcium zirconium carbon refractory and preparation method thereof |
| CN115246742A (en) * | 2021-04-28 | 2022-10-28 | 宝山钢铁股份有限公司 | Long nozzle for high-oxygen steel continuous casting |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04224061A (en) * | 1990-12-27 | 1992-08-13 | Kurosaki Refract Co Ltd | Refractory for continuous casting |
| JP4118058B2 (en) * | 2001-08-30 | 2008-07-16 | 黒崎播磨株式会社 | Immersion nozzle for casting |
-
2006
- 2006-06-28 CN CNB2006100282501A patent/CN100447107C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489696A (en) * | 2011-12-15 | 2012-06-13 | 北京利尔高温材料股份有限公司 | Oxide and non-oxide composite tundish nozzle |
| CN105985122A (en) * | 2015-02-28 | 2016-10-05 | 宝山钢铁股份有限公司 | Refractory material for submersed nozzle inner hole body |
| CN106986654A (en) * | 2017-03-28 | 2017-07-28 | 常州大学 | A kind of preparation method of slag corrosion resistance type refractory for continuous casting |
| CN107935611A (en) * | 2018-01-03 | 2018-04-20 | 武汉科技大学 | A kind of calcium zirconium carbon refractory and preparation method thereof |
| CN115246742A (en) * | 2021-04-28 | 2022-10-28 | 宝山钢铁股份有限公司 | Long nozzle for high-oxygen steel continuous casting |
| CN115246742B (en) * | 2021-04-28 | 2023-09-12 | 宝山钢铁股份有限公司 | Long nozzle for high oxygen steel continuous casting |
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| Publication number | Publication date |
|---|---|
| CN100447107C (en) | 2008-12-31 |
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Granted publication date: 20081231 Termination date: 20130628 |