CN1062248C - Refractory for continuous casting and immersion type riser - Google Patents
Refractory for continuous casting and immersion type riser Download PDFInfo
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- CN1062248C CN1062248C CN95110968A CN95110968A CN1062248C CN 1062248 C CN1062248 C CN 1062248C CN 95110968 A CN95110968 A CN 95110968A CN 95110968 A CN95110968 A CN 95110968A CN 1062248 C CN1062248 C CN 1062248C
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Abstract
The present invention discloses a refractory material for continuous casting, which has the advantages of easily acquired raw materials, no hydration through moisture absorption and good storage performance. The refractory material mainly comprises components of 10 to 35% of graphite, 50 to 85% of stable zirconium oxide or zirconium mullite, and 1 to 20% of fluoride. The present invention also relates to an immersion type composite nozzle for continuous casting and with the refractory material as an inner lining, which is used for continuously cast steel, particularly aluminum killed steel with high aluminium content, and can effectively prevent nozzle blocking caused by aluminum attachment in steel melt.
Description
The invention relates to the submerged nozzle that prevented aluminium that continuous casting steel makes with refractory materials and with this material stops up.
The aluminium of submerged nozzle stops up (also claiming the aluminium dross) directly influences the stability of continuous casting process and the raising in mouth of a river work-ing life, and this aluminium is blocked in the aluminium killed steel continuous casting particularly serious.For the aluminium that reduces submerged nozzle adheres to the obstruction that causes, the Japanese Patent spy opens clear 57-71860 and has introduced add calcium oxide (CaO) in refractory materials, stops up certain effect is arranged preventing mouth of a river aluminium.But CaO easily absorbs the water in air branch and digestion reaction takes place, and the refractory materials thermal expansion is risen, and these all are disadvantageous to the mouth of a river.For overcoming above-mentioned deficiency, the spy opens clear 62-288161 and discloses the use calcium zirconate and replace calcium oxide, and the spy opens flat 4-224061 and then further proposes to adopt calcium zirconate to cooperate fluorochemical, and these adhere to result in blockage to the aluminium that suppress submerged nozzle and have all produced positively effect.Yet contain higher CaO in the calcium zirconate, same easily moisture absorption aquation, thereby the refractory materials safe storage influenced by atmospheric moisture bigger, and the calcium zirconate raw material is not easy to obtain, making is had relatively high expectations, the price height makes mouth of a river cost increase.
The objective of the invention is to overcome the deficiency of above-mentioned prior art, provide a kind of raw material to be easy to get, stable not aquation, the continuous casting that anti-storage is good resistive connection knurl refractory materials.
It is good to another object of the present invention is to adopt above-mentioned refractory materials to make anti-blocking performance, and durable submerged nozzle, to improve mouth of a river work-ing life, reduces ton steel refractory consumption rate and manipulation strength.
The realization of the present invention's first purpose, mainly be to adopt stable zirconium oxide or zirconium mullite to replace calcium zirconate, its refractory materials is formed the graphite that mainly comprises 10～35% (weight percentage, as follows), 50～85% stable zirconium oxide or zirconium mullite, the metallic compound of 1～20% fluorine.This refractory materials is when contacting with molten steel, the aluminum oxide reaction that aluminium generates in the metallide of the stable zirconium oxide of its refractory surface or zirconium mullite and fluorine and the molten steel generates the eutectic multipolymer, run off with molten steel, thereby can effectively prevent the obstruction that the aluminium adventitious deposit causes in the molten steel.
The said content range of the present invention is a more appropriate scope, and is not to refer to accurate extreme value, and for example along with the further raising of content of graphite, the intensity of refractory materials will decrease, and wear-resistant performance of flushing also will descend, and can reduce work-ing life; Reduce content, will make the refractory heat bad stability, the anti-degradation of bursting apart.The metallide content of fluorine improves, and the anti-erosion of refractory materials, scour resistance are descended; Less than 1%, anti-aluminium adhesion property descends.Stable zirconium oxide or zirconium mullite content improve, and will make the refractory heat stability decreases, anti-bursting apart property variation; Content reduces, and anti-erosion, scour resistance will be descended.But these deficiencies also can suitably be remedied by adding other compositions.Therefore when suitably losing or reduce some characteristic, its content is suitably slightly to depart from, and this uses under some specific occasion and also is fine, and this also should belong to the present invention and conceive protection domain.
It is suitably higher in aforementioned content range that refractory materials of the present invention, stability in use zirconium white are suitably, more suitable with 64～85%.Use zirconium mullite suitable suitably low, more suitable with 50～70%.The capabilities of refractory materials of making like this is more excellent.For making refractory materials of the present invention that comprehensive performance be arranged, can suitably add some silicon carbide micro-powders, carbon black powder, alumina powder in the refractory materials of the present invention, improve capabilities of refractory materials to reach.
The metallic compound of the said fluorine of the present invention can be as Calcium Fluoride (Fluorspan), magnesium fluoride, manganous fluoride, aluminum fluoride, lithium fluoride etc., and is wherein best with the Calcium Fluoride (Fluorspan) performance especially.
The present invention's second purpose realizes, be will be as the aforementioned the refractory materials aluminium carbon mouth of a river inner body wall that is compounded in aluminium carbon or zirconium carbon or phase embedding zirconium carbon form composite nozzle, the inwall material at the mouth of a river was changed, the nozzle clogging properties is changed, generating low melting component runs off with molten steel, avoid mouth of a river inwall aluminium to adhere to the obstruction that causes, simultaneously mouth of a river inside and outside wall performance all is under a kind of good state, can improve the over-all properties and the work-ing life at the mouth of a river greatly.For mouth of a river inside and outside wall is coordinated work-ing life, the compound bed thickness of mouth of a river inwall is good with 7～10mm.
Embodiment:
Refractory materials embodiment of the present invention and contrast are as following table (wt%)
Annotate: Al
2O
3Adhere to experiment, sample is added 2% aluminium dipping observe Al after 60 minutes in 1600 ℃ of molten steel
2O
3Attachment state.A represents to adhere on a small quantity, and B represents not have and adheres to.
Shelf lives: refer to that finished product store the time that the aquation obscission occurs.
Fig. 1, Fig. 2 are respectively the sectional structure chart of composite nozzle of the present invention, and wherein 1 is aluminum-carbon refractory material, and 2 are refractory materials of the present invention, and 3 is the zirconium carbon refractories.Refractory materials layer thickness wherein of the present invention is 7～10mm.
Refractory for continuous casting of the present invention is because employing contains the low stable zirconium oxide of CaO or zirconium mullite replaces containing the CaO height Calcium zirconate, can not only prevent effectively that the aluminium in the molten steel from adhering to, and overcome prior art and contain the calcium zirconate refractory material and easily inhale Wet aquation, the shortcoming of anti-storage not makes that the capabilities of refractory materials of preparation is stable to be difficult for aquation, and storage characteristic is good, and raw material is easy to get, Especially the zirconium mullite cost of material is low, and economic performance is good. With this composite nozzle of making, it is a kind of that mouth of a river inside and outside wall all is in Excellent condition has not only prevented the dross obstruction, and greatly improves mouth of a river service life, has reduced the ton steel and has consumed a refractory material And manipulation strength.
Claims (6)
1, a kind of refractory for continuous casting is characterized in that containing the graphite of 10～35% (weight percentage, as follows), 50～85% stable zirconium oxide or zirconium mullite, the metallic compound of 1～20% fluorine.
2,, it is characterized in that said stable zirconium oxide is 64～85% according to the described refractory materials of claim 1.
3,, it is characterized in that said zirconium mullite is 50～70% according to the described refractory materials of claim 1.
4, according to claim 1,2 or 3 described refractory materialss, the metallic compound that it is characterized in that said fluorine is a Calcium Fluoride (Fluorspan).
5, a kind of immersion water gap for continuously casting, comprise aluminium carbon or zirconium carbon or be embedded with the aluminium carbon mouth of a river body of zirconium carbon mutually, it is characterized in that said mouth of a river inner body wall has 10～35% (weight percentage, as follows) graphite, 50～85% stable zirconium oxide or zirconium mullite, the refractory composite layer that the metallic compound of 1～20% fluorine is formed.
6, according to the described formula mouth of a river that enters of claim 5, it is characterized in that said compound bed thickness 7～10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95110968A CN1062248C (en) | 1995-03-13 | 1995-03-13 | Refractory for continuous casting and immersion type riser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95110968A CN1062248C (en) | 1995-03-13 | 1995-03-13 | Refractory for continuous casting and immersion type riser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1112909A CN1112909A (en) | 1995-12-06 |
| CN1062248C true CN1062248C (en) | 2001-02-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95110968A Expired - Fee Related CN1062248C (en) | 1995-03-13 | 1995-03-13 | Refractory for continuous casting and immersion type riser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1062248C (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1070465C (en) * | 1996-12-10 | 2001-09-05 | 济南钢铁集团总公司钢铁研究所 | Gate material for continuous casting and preparing process thereof |
| CN1076718C (en) * | 1996-12-10 | 2001-12-26 | 济南钢铁集团总公司钢铁研究所 | Hydration-proof zirconium oxide-calcium oxide material and its preparing process |
| CN1060752C (en) * | 1997-02-27 | 2001-01-17 | 宝山钢铁(集团)公司 | Production method of refractory material for immersed sprue |
| CN1084313C (en) * | 1997-10-24 | 2002-05-08 | 冶金部洛阳耐火材料研究院 | Method for preparing refractory raw material for immerseable gate |
| CN1323781C (en) * | 2003-03-14 | 2007-07-04 | 上海宝湘耐火材料有限公司 | Manufacture of zirconium mullite runner for continuous casting bakie |
| CN100354228C (en) * | 2006-04-27 | 2007-12-12 | 鞍山市耘路耐火材料有限公司 | Novel zirconium metering nozzle for tundish |
| CN100457321C (en) * | 2007-04-30 | 2009-02-04 | 山东中齐耐火材料有限公司 | Non-fabric heat-proof coating material for continuous casting nozzle |
| CN102531652A (en) * | 2012-01-11 | 2012-07-04 | 浙江大学 | Aluminium-repellent basalt and preparation method thereof |
| CN102584270A (en) * | 2012-01-11 | 2012-07-18 | 浙江大学 | Non-stick aluminum alumina hollow balls and preparation method thereof |
| CN102699317B (en) * | 2012-04-19 | 2013-11-27 | 济南麦哈勃冶金技术开发有限公司 | Combined elongated upper nozzle |
| CN106735158B (en) * | 2017-02-24 | 2019-03-15 | 山东钢铁股份有限公司 | A kind of crystallizer submersed nozzle and its application method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5771860A (en) * | 1980-10-24 | 1982-05-04 | Kurosaki Refractories Co | Cao-containing graphitic casting nozzle |
| JPS62288161A (en) * | 1986-06-05 | 1987-12-15 | 黒崎窯業株式会社 | Manufacture of dipping nozzle containing zro2-cao for continuous casting |
| JPH04224061A (en) * | 1990-12-27 | 1992-08-13 | Kurosaki Refract Co Ltd | Refractory for continuous casting |
-
1995
- 1995-03-13 CN CN95110968A patent/CN1062248C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5771860A (en) * | 1980-10-24 | 1982-05-04 | Kurosaki Refractories Co | Cao-containing graphitic casting nozzle |
| JPS62288161A (en) * | 1986-06-05 | 1987-12-15 | 黒崎窯業株式会社 | Manufacture of dipping nozzle containing zro2-cao for continuous casting |
| JPH04224061A (en) * | 1990-12-27 | 1992-08-13 | Kurosaki Refract Co Ltd | Refractory for continuous casting |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1112909A (en) | 1995-12-06 |
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