CN111545739A - Integrally-formed anti-oxidation long-life iron-clad tundish nozzle - Google Patents
Integrally-formed anti-oxidation long-life iron-clad tundish nozzle Download PDFInfo
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- CN111545739A CN111545739A CN202010521308.6A CN202010521308A CN111545739A CN 111545739 A CN111545739 A CN 111545739A CN 202010521308 A CN202010521308 A CN 202010521308A CN 111545739 A CN111545739 A CN 111545739A
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- nozzle
- lower nozzle
- boss
- upper nozzle
- river
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The invention discloses an integrally formed anti-oxidation long-life iron-clad tundish nozzle, which comprises an upper nozzle (1) and a lower nozzle (2), wherein the upper nozzle (1) consists of an upper nozzle body (3), an upper nozzle zirconia lining (4), an upper nozzle molten steel through hole (5), an upper nozzle boss (6), an upper nozzle bowl opening (7) and an upper nozzle iron shell (8), the lower nozzle (2) consists of a lower nozzle body (9), a lower nozzle zirconia lining (10), a lower nozzle boss (11), a lower nozzle support frame (12), a lower nozzle molten steel through hole (13), a lower nozzle iron shell (14), a lower nozzle bowl opening (15) and a lower nozzle trapezoidal hole (16), and the performances of erosion resistance of molten steel and molten slag corrosion of the ladle nozzle are enhanced through the integral structure of the upper nozzle and the lower nozzle and the addition of an iron shell outside the upper nozzle and the lower nozzle, the lower nozzle body is designed to be a spherical surface body of a bowl mouth, so that air is prevented from entering, and the quality of steel-making production is improved.
Description
Technical Field
The invention relates to the technical field of continuous casting processing of refractory materials, in particular to an integrally-formed anti-oxidation long-life tundish nozzle of an iron shell.
Background
In the continuous steel casting process, molten steel continuously passes through a water-cooled crystallizer, is condensed into a hard shell, is continuously pulled out from an outlet below the crystallizer, and is cooled by water spraying to be completely solidified to form a steel blank with a required shape. The tundish nozzle is an important component in the continuous casting production process. When the steel is continuously cast, a zirconium core is usually embedded into the inner sides of an upper nozzle and a lower nozzle body of the existing tundish nozzle, then a slide plate surface is bonded, the upper nozzle and the lower nozzle of the tundish formed by split molding and bonding are not firmly bonded, the performances of molten steel scouring resistance and slag erosion resistance are poor, and the diameters of the upper end and the lower end of a through hole of the lower nozzle are consistent.
The invention provides an integrally formed anti-oxidation long-life iron-clad tundish nozzle, an upper nozzle and a lower nozzle of the tundish nozzle are integrally formed, the firmness is stronger, a layer of iron shell is additionally arranged on the outer sides of the upper nozzle body and the lower nozzle body, so that the molten steel scouring resistance and the molten slag erosion resistance of the tundish nozzle are excellent, the service life of the tundish nozzle is twice that of the upper nozzle in the prior art, the production requirement of continuous casting steel is met, and through the design of a bowl-mouth spherical body of the lower nozzle, when the tundish nozzle is matched with a bowl-mouth-shaped invasive nozzle, the matching gap between the lower nozzle of the tundish and the invasive nozzle is avoided, the entering oxidation of air is reduced, the generation of oxidation impurities is avoided, and the production quality of steel is improved.
Disclosure of Invention
The invention aims to overcome the technical problems that the existing tundish nozzle formed by split forming and bonding is not firm due to the fact that a zirconium core is usually embedded in the inner side of a nozzle body, a slide plate surface is bonded, the tundish nozzle formed by split forming and bonding is poor in molten steel scouring and slag erosion resistance, and when the tundish nozzle is matched with a bowl-mouth-shaped invasive nozzle, a large gap is always formed, air easily enters the gap, molten steel is oxidized to form oxides and impurities, the formed oxides and impurities are mixed in the molten steel, and the production quality of high-precision steel is affected.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides an anti-oxidation long-life iron-clad tundish nozzle of integrated into one piece which characterized in that: the upper nozzle comprises an upper nozzle body 1 and a lower nozzle body 2, wherein the upper nozzle body 1 comprises an upper nozzle zirconia lining 4, an upper nozzle molten steel through hole 5, an upper nozzle boss 6, an upper nozzle bowl opening 7 and an upper nozzle iron shell 8, the upper nozzle iron shell 8 is positioned on the outer sides of the upper nozzle body 3 and the upper nozzle boss 6, the upper nozzle body 3, the upper nozzle boss 6 and the upper nozzle zirconia lining 4 are integrally formed into an integral structure, the lower nozzle 2 comprises a lower nozzle body 9, a lower nozzle zirconia lining 10, a lower nozzle boss 11, a lower nozzle support frame 12, a lower nozzle molten steel through hole 13, a lower nozzle iron shell 14, a lower nozzle bowl opening 15 and a lower nozzle trapezoidal hole 16, the lower nozzle body 9, the lower nozzle zirconia lining 10, the lower nozzle boss 11 and a lower nozzle support frame 12 are integrally formed into an integral structure, and the lower nozzle iron shell 14 is positioned on the outer sides of the lower nozzle support frame 12 and the lower nozzle body 9, the lower nozzle boss 11 is connected with the lower nozzle support frame 12, the lower end of the lower nozzle body 9 is a bowl opening spherical body, and the lower nozzle trapezoidal hole 12 is located at the lower end of the lower nozzle molten steel through hole 13.
Further, the thickness of the iron shells of the upper nozzle iron shell 8 and the lower nozzle iron shell 14 is 0.1-1.5 mm.
Further, the lower nozzle body 3, the lower nozzle body 9, the upper nozzle boss 6, the lower nozzle boss 11 and the lower nozzle support frame 12 are made of aluminum-zirconium-carbon materials.
Furthermore, the diameter of the bowl mouth 15 of the lower nozzle is 1.5 to 3 times of the diameter of the lower part of the molten steel through hole 5 of the upper nozzle.
Furthermore, the flatness of the upper nozzle boss 6 and the lower nozzle boss 11 is between 0.1 and 0.5 mm.
Further, the lower nozzle boss 11 and the lower nozzle support frame 12 are rectangular, the width of the lower nozzle boss 11 is the same as that of the lower nozzle support frame 12, and the length of the lower nozzle support frame 12 is 1.5-2.0 times that of the lower nozzle boss 11.
Furthermore, the upper nozzle zirconia lining 4 and the upper nozzle zirconia lining 10 are made of zirconia materials, the apparent porosity is less than or equal to 18%, and the volume density is more than or equal to 5.1 g/cc.
Further, the upper nozzle and the lower nozzle are connected with the upper nozzle boss 6 through the lower nozzle boss 11, and the lower nozzle bowl 15 is connected with the upper nozzle molten steel through hole 5.
Compared with the prior art, the invention has the advantages that: the upper nozzle and the lower nozzle are integrally formed into an integral structure, so that the phenomenon that a tundish nozzle formed by separately forming and bonding is infirm in bonding and easy to cause steel penetration accidents is avoided, and a layer of iron shell is additionally arranged outside the bodies and the bosses of the upper nozzle and the lower nozzle, so that the molten steel erosion resistance and the molten slag erosion resistance of the tundish nozzle are enhanced, and the efficiency and the safety of continuous steel casting production are higher. The frequent replacement of the drainage port is avoided, and the labor intensity and the production cost are reduced. The production requirement of the continuous casting steel is met,
the diameter of the lower nozzle bowl opening is larger than the diameter of the lower part of the upper nozzle molten steel through hole, so that the molten steel can be prevented from entering air when entering the lower water hole from the upper nozzle, the production of oxidation impurities can be avoided, the lower end of the lower nozzle body is designed to be a bowl opening spherical body, when the lower nozzle body is matched with the bowl opening-shaped invasive nozzle, the matching gap between the lower nozzle of the tundish and the invasive nozzle can be avoided, the entering oxidation of air can be reduced, the generation of oxidation impurities can be avoided, and the production quality of steel billets produced by continuous cast steel can be further improved.
Drawings
FIG. 1 is a schematic structural view of an integrally formed anti-oxidation long-life tundish nozzle of an iron casing according to the present invention;
FIG. 2 is a top view of a drain of the integrally formed oxidation-resistant long-life tundish nozzle of the present invention;
in the figure: 1. a water feeding port; 2. a water outlet; 3. a water feeding port body; 4. a zirconia lining of the water feeding port; 5. a molten steel through hole of the water feeding port; 6. a water feeding port boss; 7. a water feeding port bowl opening; 8. a water feeding port iron shell; 9. a lower nozzle body; 10. a zirconia lining at the lower nozzle; 11. a lower nozzle boss; 12. a lower nozzle support frame; 13. a molten steel through hole of a water outlet; 14. a drain iron shell; 15. a lower nozzle bowl opening; 16. the lower water gap is provided with a trapezoidal hole.
Detailed Description
In view of the defects in the prior art, the technical scheme of the invention is provided through long-term research and massive practice. The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Fig. 1 is a schematic structural view of an integrally formed anti-oxidation long-life tundish nozzle provided in an embodiment of the present invention, and fig. 2 is a top view of an integrally formed anti-oxidation long-life tundish nozzle drain nozzle of the present invention. As shown in fig. 1 and 2, an integrally formed oxidation-resistant long-life tundish nozzle provided in an embodiment of the present invention includes: the upper nozzle comprises an upper nozzle body 1 and a lower nozzle body 2, wherein the upper nozzle body 1 comprises an upper nozzle zirconia lining 4, an upper nozzle molten steel through hole 5, an upper nozzle boss 6, an upper nozzle bowl opening 7 and an upper nozzle iron shell 8, the upper nozzle iron shell 8 is positioned on the outer sides of the upper nozzle body 3 and the upper nozzle boss 6, the upper nozzle body 3, the upper nozzle boss 6 and the upper nozzle zirconia lining 4 are integrally formed into an integral structure, the lower nozzle 2 comprises a lower nozzle body 9, a lower nozzle zirconia lining 10, a lower nozzle boss 11, a lower nozzle support frame 12, a lower nozzle molten steel through hole 13, a lower nozzle iron shell 14, a lower nozzle bowl opening 15 and a lower nozzle trapezoidal hole 16, the lower nozzle body 9, the lower nozzle zirconia lining 10, the lower nozzle boss 11 and a lower nozzle support frame 12 are integrally formed into an integral structure, and the lower nozzle iron shell 14 is positioned on the outer sides of the lower nozzle support frame 12 and the lower nozzle body 9, the lower nozzle boss 11 is connected with the lower nozzle support frame 12, the lower end of the lower nozzle body 9 is a bowl opening spherical body, and the lower nozzle trapezoidal hole 12 is located at the lower end of the lower nozzle molten steel through hole 13.
According to the integrally formed anti-oxidation long-life iron-clad tundish nozzle provided by the embodiment of the invention, the thicknesses of the iron shells of the upper nozzle iron shell 8 and the lower nozzle iron shell 14 are 0.1-1.5mm, so that the molten steel erosion resistance and the molten slag erosion resistance of the tundish nozzle can be further improved.
The integrally formed anti-oxidation long-life tundish nozzle of the iron shell provided by the embodiment of the invention is characterized in that the lower nozzle body 3, the lower nozzle body 9, the upper nozzle boss 6, the lower nozzle boss 11 and the lower nozzle support frame 12 are made of aluminum-zirconium-carbon materials.
According to the integrally formed anti-oxidation long-life tundish nozzle of the iron shell, the diameter of the lower nozzle bowl opening 15 is 1.5-3 times that of the lower part of the molten steel through hole 5 of the upper nozzle, so that air can be prevented from entering and molten steel oxidation can be avoided.
According to the integrally formed anti-oxidation long-life tundish nozzle of the iron shell, the flatness of the upper nozzle boss 6 and the lower nozzle boss 11 is 0.1-0.5mm, so that the contact position of the upper nozzle and the lower nozzle is enhanced in sealing property, air is prevented from entering, and molten steel is prevented from being oxidized.
According to the integrally formed anti-oxidation long-life tundish nozzle, the lower nozzle boss 11 and the lower nozzle support frame 12 are rectangular, the width of the lower nozzle boss 11 is the same as that of the lower nozzle support frame 12, and the length of the lower nozzle support frame 12 is 1.5-2.0 times that of the lower nozzle boss 11.
The integrally formed anti-oxidation long-life tundish nozzle of the iron shell provided by the embodiment of the invention is characterized in that the zirconia lining 4 and the zirconia lining 10 of the upper nozzle are made of zirconia materials, the apparent porosity is less than or equal to 18%, and the volume density is more than or equal to 5.1 g/cc.
According to the integrally formed anti-oxidation long-life tundish nozzle of the iron shell, the upper nozzle 1 and the lower nozzle 2 are connected with the upper nozzle boss 6 through the lower nozzle boss 11, the lower nozzle bowl 15 is connected with the upper nozzle molten steel through hole 5, molten steel enters the lower nozzle bowl 15 through the upper nozzle molten steel through hole 5, then enters the lower nozzle molten steel channel 13, enters the lower nozzle trapezoidal hole 12 and finally flows into the submerged nozzle.
The invention has the beneficial effects that: the upper nozzle and the lower nozzle are integrally formed into an integral structure, so that the phenomenon that a tundish nozzle formed by separately forming and bonding is infirm in bonding and easy to cause steel penetration accidents is avoided, and a layer of iron shell is additionally arranged outside the bodies and the bosses of the upper nozzle and the lower nozzle, so that the molten steel erosion resistance and the molten slag erosion resistance of the tundish nozzle are enhanced, and the efficiency and the safety of continuous steel casting production are higher. The frequent replacement of the drainage port is avoided, and the labor intensity and the production cost are reduced. The production requirement of the continuous casting steel is met,
the diameter of the lower nozzle bowl opening is larger than the diameter of the lower part of the upper nozzle molten steel through hole, so that the molten steel can be prevented from entering air when entering the lower water hole from the upper nozzle, the production of oxidation impurities can be avoided, the lower end of the lower nozzle body is designed to be a bowl opening spherical body, when the lower nozzle body is matched with the bowl opening-shaped invasive nozzle, the matching gap between the lower nozzle of the tundish and the invasive nozzle can be avoided, the entering oxidation of air can be reduced, the generation of oxidation impurities can be avoided, and the production quality of steel billets produced by continuous cast steel can be further improved.
It should be understood that the above-mentioned embodiments are only illustrative of the technical concept and features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the contents of the present invention and to implement the same, and the protection scope of the present invention is not limited thereby. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (8)
1. The utility model provides an anti-oxidation long-life iron-clad tundish nozzle of integrated into one piece which characterized in that: the upper nozzle comprises an upper nozzle body (3), an upper nozzle zirconia lining (4), an upper nozzle molten steel through hole (5), an upper nozzle boss (6), an upper nozzle bowl opening (7) and an upper nozzle iron shell (8), wherein the upper nozzle iron shell (8) is positioned outside the upper nozzle body (3) and the upper nozzle boss (6), the upper nozzle body (3), the upper nozzle boss (6) and the upper nozzle zirconia lining (4) are integrally formed into an integral structure, the lower nozzle (2) comprises a lower nozzle body (9), a lower nozzle zirconia lining (10), a lower nozzle boss (11), a lower nozzle support frame (12), a lower nozzle molten steel through hole (13), a lower nozzle iron shell (14), a lower nozzle bowl opening (15) and a lower nozzle trapezoidal hole (16), and the lower nozzle body (9), Lower mouth of a river zirconia inside lining (10), lower mouth of a river boss (11) and lower mouth of a river support frame (12) are integrated into one piece's structure, lower mouth of a river iron-clad (14) are located lower mouth of a river support frame (12) and lower mouth of a river body (9) outside, lower mouth of a river boss (11) link to each other with lower mouth of a river support frame (12), the lower extreme of lower mouth of a river body (9) is the bowl mouth sphere, lower mouth of a river trapezoidal hole (12) are located the lower extreme of lower mouth of a river through-hole (13).
2. The integrally formed oxidation-resistant long-life tundish nozzle of claim 1, wherein: the thickness of the iron shells of the upper nozzle iron shell (8) and the lower nozzle iron shell (14) is 0.1-1.5 mm.
3. The integrally formed oxidation-resistant long-life tundish nozzle of claim 1, wherein: the lower nozzle body (3), the lower nozzle body (9), the upper nozzle boss (6), the lower nozzle boss (11) and the lower nozzle support frame (12) are made of aluminum-zirconium-carbon materials.
4. The integrally formed oxidation-resistant long-life tundish nozzle of claim 1, wherein: the diameter of the lower part of the lower nozzle bowl opening (15) is 1.5-3 times that of the lower part of the upper nozzle molten steel through hole (5).
5. The integrally formed oxidation-resistant long-life tundish nozzle of claim 1, wherein: the flatness of the upper nozzle boss (6) and the lower nozzle boss (11) is between 0.1 and 0.5 mm.
6. The integrally formed oxidation-resistant long-life tundish nozzle of claim 1, wherein: the lower nozzle boss (11) and the lower nozzle support frame (12) are rectangular, the width of the lower nozzle boss (11) is the same as that of the lower nozzle support frame (12), and the length of the lower nozzle support frame (12) is 1.5-2.0 times that of the lower nozzle boss (11).
7. The integrally formed oxidation-resistant long-life tundish nozzle of claim 1, wherein: the upper nozzle zirconia lining (4) and the upper nozzle zirconia lining (10) are made of zirconia materials, the apparent porosity is less than or equal to 18%, and the volume density is more than or equal to 5.1 g/cc.
8. The integrally formed oxidation-resistant long-life tundish nozzle of claim 1, wherein: the upper nozzle and the lower nozzle are connected with the upper nozzle boss (6) through the lower nozzle boss (11), and the lower nozzle bowl opening (15) is connected with the upper nozzle molten steel through hole (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010521308.6A CN111545739A (en) | 2020-06-13 | 2020-06-13 | Integrally-formed anti-oxidation long-life iron-clad tundish nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010521308.6A CN111545739A (en) | 2020-06-13 | 2020-06-13 | Integrally-formed anti-oxidation long-life iron-clad tundish nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111545739A true CN111545739A (en) | 2020-08-18 |
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ID=71997273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010521308.6A Pending CN111545739A (en) | 2020-06-13 | 2020-06-13 | Integrally-formed anti-oxidation long-life iron-clad tundish nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111545739A (en) |
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2020
- 2020-06-13 CN CN202010521308.6A patent/CN111545739A/en active Pending
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