CN101486092A - Continuous casting tundish stopper - Google Patents
Continuous casting tundish stopper Download PDFInfo
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- CN101486092A CN101486092A CNA2008100430428A CN200810043042A CN101486092A CN 101486092 A CN101486092 A CN 101486092A CN A2008100430428 A CNA2008100430428 A CN A2008100430428A CN 200810043042 A CN200810043042 A CN 200810043042A CN 101486092 A CN101486092 A CN 101486092A
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- stopper rod
- continuous casting
- stopper
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Abstract
The invention relates to a continuous casting tundish stopper rod, in particular to design of a slag line part composition of the tundish stopper rod, which mainly solves the problem of slag corrosion cracking of a slag line part of the stopper rod. The continuous casting tundish stopper rod adopts a technical proposal that the continuous casting tundish stopper rod with long service life comprises a stopper rod body and a stopper rod slag line. The continuous casting tundish stopper rod is characterized in that the slag line part adopts refractory materials which comprise the following compositions in percentage by weight: 8 to 15 percent of SiO2, 0.5 to 1 percent of Al2O3, 0.1 to 0.5 percent of Fe2O3, 1 to 3 percent of CaO, 0.1 to 0.3 percent of MgO, 60.8 to 64.0 percent of ZrO2 and 20 to 27 percent of graphite. The continuous casting tundish stopper rod is mainly used for improving the reliability and the service life of steel teeming equipment.
Description
Technical field:
The present invention relates to a kind of continuous casting tundish stopper, particularly tundish stopper slag lining component design.
Background technology:
In recent years, along with the quickening of China's economic construction developing steps, the first in the world is continued to hold a post or title in the iron and steel annual production for years.The steel annual production of China in 2005 reaches 3.49 hundred million tons, and continuous casting steel billet output reaches 1.43 hundred million tons.Meanwhile, world's manufacturing industry has more increased the weight of the burden of China's energy, resource and environment to the transfer of China.Adopt advanced production technology, improve the quality and reduce production costs, not only help improving the market competitiveness of Iron and Steel Enterprises in China, the more important thing is the principle that meets the long-term sustainable development.The normal unusual whole situation of watering that occurs in the casting process; thereby increased the refractory consumption cost because of using refractory material not reach predetermined pour steel weight on the one hand, needed a large amount of times to lose the conticaster production capacity thereby start shooting again because of cancel closedown on the other hand.Doing many effort aspect raising and the stabilizing continuous casting casting cycle both at home and abroad for this reason, as adopting advanced electrical control means to strengthen the reliability of control, adopt digital machine processing continuous casting plant equipment to improve equipment precision, the reliability that adopts advanced refractory technology to improve to contain steel equipment and service life or the like.
For the reliability of improve containing steel equipment and the technology in service life, the particularly reliability of tundish stopper and service life the aspect, had similar techniques to occur at present both at home and abroad, but implementation method and approach differ widely.As, a patent part of having applied for mainly is to reach anti-disconnected long-life purpose by the physical dimension that changes the stopper slag lining both at home and abroad, as patent JP03198955A; Some is to reach the corrosion purpose of slowing down stopper by changing molten steel composition in addition, as JP07223058A; Some is by reaching the corrosion purpose of slowing down stopper at the oxidation resistant coating of stopper surface spray skim, as patent JP10058099A.The service condition of these methods all has strict requirement, thereby these technology are not generally promoted.The related article of publishing rests on mostly and improves the tundish covering flux performance and control the effect that ladle roughing slag reaches the raising stopper life-span, as adopting bale slag-blanking detection system etc. except foregoing.In a word, improving the tundish stopper life-span is the key that improves the tundish life-span, and improving the anti-fracture energy of slag lining is to improve the stopper center of gravity in casting life-span.
Summary of the invention:
The purpose of this invention is to provide a kind of long-life tundish stopper, mainly solve stopper slag lining slag corrosion breakage problem.
Thinking of the present invention is the purpose that improves stopper slag lining opposing tundish bits corrosive power by changing the component of stopper slag lining refractory material, reaching, thereby has solved because of the too fast stopper breakage problem that causes of stopper slag lining corrosion.Theoretical foundation of the present invention is the ability that ZrO2 has very strong anti-slag corrosion, and this material is placed into the stopper slag lining, can improve stopper slag line anti-corrosion capability, simultaneously owing to be that local the use can not cause the stopper manufacturing cost significantly to rise.
Technical scheme of the present invention is: a kind of long-life continuous casting tundish stopper, comprise stopper body, stopper slag line, and it is characterized in that: slag lining adopts refractory material, and the percentage by weight of each component of refractory material is: SiO
28～15%, Al
2O
30.5～1%, Fe
2O
30.1～0.5%, CaO 1～3%, MgO 0.1～0.3%, ZrO
260.8～64.0%, graphite 20～27%.
Select suitable slag line material gauge, make the anti-erosion time of slag line material meet stopper requirement projected life, to guarantee its service life.Determine the spot size of stopper slag line material at last.Determine the spot size of stopper slag line material according to the tundish liquid level of continuous casting tundish working control, this size of different tundish may be different.
The invention has the beneficial effects as follows: the present invention is by changing the component of stopper slag lining refractory material, adopt rational preparation method, reach the purpose that improves stopper slag lining opposing tundish bits corrosive power, thereby solved because of the too fast stopper breakage problem that causes of stopper slag lining corrosion.Form following advantage:
1, the present invention has improved the service life of stopper, thereby has improved the service life of tundish, reduces the cost consumption of anti-the material.
2, the present invention has stablized the service life of stopper, has avoided that the disconnected rod cause unusually is disconnected to water accident because of the stopper slag line corrodes, and has improved the production capacity of conticaster and has reduced continuous casting accident cost.
Description of drawings:
Accompanying drawing is a structural representation of the present invention
Among the figure: 1-stopper body, 2-stopper slag line.
The specific embodiment:
With reference to accompanying drawing, long-life continuous casting tundish stopper comprises stopper body 1, stopper slag line 2.
1, the composition of slag lining refractory material and physicochemical property see the following form:
Slag lining refractory material main component table
| Title | Symbol | Unit | Embodiment 1 | |
Embodiment 3 |
| Silica | SiO 2 | ％ | 9 | 13 | 10.18 |
| Aluminium oxide | Al 2O 3 | ％ | 0.6 | 0.8 | 0.65 |
| Iron oxide | Fe 2O 3 | ％ | 0.3 | 0.4 | 0.27 |
| Calcium oxide | CaO | ％ | 3 | 2 | 1.33 |
| Magnesia | MgO | ％ | 0.1 | 0.25 | 0.15 |
| Zirconia | ZrO 2 | ％ | 63 | 61.55 | 61.90 |
| Graphite | C | ％ | 24 | 22 | 25.52 |
Slag lining refractory material physical index table
| Title | Unit | Specification requirement | Representative value |
| Break modulus: | N/mm 2 | 8.6～9.3 | 9.1 |
| Apparent porosity: | ％ | 11.5～16.0 | 13.8 |
| Bulk density: | g/cm 3 | 3.54～3.88 | 3.72 |
| Scaling loss | ％ | 19～25 | 21.62 |
Note: stopper bulk material composition and physicochemical property table thereof:
| Project | Unit | Index |
| Al 2O 3 | ％ | 49—54 |
| C | ％ | 29.2—34.2 |
| SiO 2 | ％ | 10.0-16.0 |
| Fe 2O 3 | ％ | ≤1.0 |
| MgO | ％ | - |
| CaO | ％ | - |
| ZrO 2 | ％ | ≤1.5 |
| Rupture strength (room temperature) | MPa | 5.6—9.9 |
| Apparent porosity | ％ | 15.7—19.4 |
| Bulk density | g/cm 3 | 2.31—2.42 |
2, conticaster tundish level control height is in 1100～1200mm scope, middle cinder inclusion floats on the molten steel, slag is thick usually between 50～100mm, so slag lining is between 1090～1390mm, so the slag line slag lining uses slag line material length to be 300mm; Slag line material thickness 30～40mm; Adopt conventional isostatic compaction mode to make.
Claims (1)
1, a kind of long-life continuous casting tundish stopper comprises stopper body, stopper slag line, it is characterized in that: slag lining adopts refractory material, and the percentage by weight of each component of refractory material is: SiO
28～15%, Al
2O
30.5～1%, Fe
2O
30.1～0.5%, CaO 1～3%, MgO 0.1～0.3%, ZrO
260.8～64.0%, graphite 20～27%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100430428A CN101486092A (en) | 2008-01-18 | 2008-01-18 | Continuous casting tundish stopper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100430428A CN101486092A (en) | 2008-01-18 | 2008-01-18 | Continuous casting tundish stopper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101486092A true CN101486092A (en) | 2009-07-22 |
Family
ID=40889239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100430428A Pending CN101486092A (en) | 2008-01-18 | 2008-01-18 | Continuous casting tundish stopper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101486092A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102515798A (en) * | 2011-12-12 | 2012-06-27 | 辽宁科大东方巨业高级陶瓷有限公司 | High corrosion resistant integral stopper for continuous casting |
| CN106513654A (en) * | 2016-11-16 | 2017-03-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Stopper rod with ventilation ring |
| CN108863415A (en) * | 2018-08-21 | 2018-11-23 | 北京利尔高温材料股份有限公司 | A kind of stopper being compounded with useless ladle slag line brick particle |
| CN111054911A (en) * | 2019-12-27 | 2020-04-24 | 泰州市旺鑫耐火材料有限公司 | Stopper rod with reinforced slag line part |
-
2008
- 2008-01-18 CN CNA2008100430428A patent/CN101486092A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102515798A (en) * | 2011-12-12 | 2012-06-27 | 辽宁科大东方巨业高级陶瓷有限公司 | High corrosion resistant integral stopper for continuous casting |
| CN102515798B (en) * | 2011-12-12 | 2013-09-25 | 辽宁科技大学 | High corrosion resistant integral stopper for continuous casting |
| CN106513654A (en) * | 2016-11-16 | 2017-03-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Stopper rod with ventilation ring |
| CN106513654B (en) * | 2016-11-16 | 2018-11-16 | 成都先进金属材料产业技术研究院有限公司 | The stopper of the ventilative ring of band |
| CN108863415A (en) * | 2018-08-21 | 2018-11-23 | 北京利尔高温材料股份有限公司 | A kind of stopper being compounded with useless ladle slag line brick particle |
| CN111054911A (en) * | 2019-12-27 | 2020-04-24 | 泰州市旺鑫耐火材料有限公司 | Stopper rod with reinforced slag line part |
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| PB01 | Publication | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20090722 |