CN111590064A - Long-life combined tundish nozzle device - Google Patents
Long-life combined tundish nozzle device Download PDFInfo
- Publication number
- CN111590064A CN111590064A CN202010593367.4A CN202010593367A CN111590064A CN 111590064 A CN111590064 A CN 111590064A CN 202010593367 A CN202010593367 A CN 202010593367A CN 111590064 A CN111590064 A CN 111590064A
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- Prior art keywords
- nozzle
- zirconium core
- upper nozzle
- lower nozzle
- tundish
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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
-
- 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
- B22D41/52—Manufacturing or repairing thereof
- B22D41/54—Manufacturing or repairing thereof characterised by the materials used therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The invention discloses a long-life combined tundish nozzle device, which comprises an upper nozzle, a lower nozzle, a brick cup, a quick-change structure and an upper nozzle, wherein the upper nozzle is divided into an upper nozzle body, an upper nozzle zirconium core, an upper nozzle boss, the lower part of the upper nozzle zirconium core and an upper nozzle molten steel channel, the lower nozzle is divided into a lower nozzle body, a lower nozzle zirconium core, a lower nozzle boss, a lower nozzle convex edge, a lower nozzle bowl opening and a lower nozzle molten steel channel, the central lines of the upper nozzle zirconium core and the lower nozzle zirconium core are superposed, the inner diameter of the bowl opening of the lower nozzle zirconium core is larger than the inner diameter of the lower part of the upper nozzle zirconium core, and the lower nozzle zirconium core is T-shaped. According to the invention, through the design that the diameter of the bowl opening of the lower nozzle is larger than the diameter of the lower part of the zirconium core of the upper nozzle, the contact area of the zirconium cores of the upper nozzle and the lower nozzle is enlarged, the problem of hole expansion of the tundish nozzle caused by molten steel flow velocity is reduced, and the service life of the tundish nozzle is prolonged.
Description
Technical Field
The invention relates to the technical field of continuous casting processing of refractory materials, in particular to a long-life combined tundish nozzle device.
Background
The effective combination area of the upper end surface of the zirconium core of the tundish lower nozzle and the lower end surface of the zirconium core of the upper nozzle in the prior art is small, and the combination part of the upper end surface and the zirconium core of the tundish lower nozzle is easily washed and damaged in the continuous casting process, so that molten steel seeps out from the combination part. On the other hand, when molten steel flows through the inner surfaces of the upper nozzle zirconia core and the lower nozzle zirconia core, erosion can be generated, reaming is caused, the upper nozzle and the lower nozzle can be damaged quickly, the service life of the tundish is short, the tundish needs to be replaced frequently, and the production cost of the continuous casting molten steel is increased.
The invention aims to provide a long-life combined tundish nozzle device to solve the problems.
Disclosure of Invention
The invention aims to solve the technical problems that in the prior art, the effective combination area of a lower nozzle zirconium core and an upper nozzle zirconium core is small, a combination part is easy to wash and damage in the production process, molten steel seeps out from the combination part, and the upper nozzle zirconium core and the lower nozzle zirconium core are quickly damaged due to the fact that the molten steel washes in the inner surfaces of the upper nozzle zirconium core and the lower nozzle zirconium core, so that the service life of a tundish is short. The long-life combined tundish nozzle device has excellent thermal shock resistance of molten steel and erosion resistance of slag and molten steel, can effectively prolong the service life of a tundish and meets the production requirement of continuous casting steel.
In order to achieve the purpose, the invention adopts the technical scheme that: the upper nozzle comprises an upper nozzle 1, a lower nozzle 2, a brick cup 3, a quick change structure 4 and an upper nozzle 5, wherein the upper nozzle 1 comprises an upper nozzle body 6, an upper nozzle zirconium core 7, an upper nozzle boss 8, an upper nozzle zirconium core lower part 15 and an upper nozzle molten steel channel 16, the lower nozzle 2 comprises a lower nozzle body 9, a lower nozzle zirconium core 10, a lower nozzle boss 11, a lower nozzle convex edge 12, a lower nozzle bowl 14 and a lower nozzle molten steel channel 13, the upper nozzle 1 is tightly connected with the lower nozzle 2, the central lines of the upper nozzle zirconium core 7 and the lower nozzle zirconium core 10 are superposed, the upper nozzle zirconium core 7 is fixed in the upper nozzle body 6 in an embedded manner, the lower nozzle zirconium core 10 is fixed in the lower nozzle body 9 in an embedded manner, the diameter of the upper nozzle molten steel channel 16 is larger than that of the lower nozzle molten steel channel 13, and the inner diameter of the lower nozzle bowl 10 is larger than that of the upper nozzle zirconium core lower part 15, the shape of the zirconium core 10 of the lower nozzle is T-shaped.
Furthermore, the shape of the upper nozzle zirconium core 7 is a truncated cone, and the diameter of the upper end surface of the upper nozzle zirconium core 7 is 0.9-1.0 times of the diameter of the lower end surface.
Further, the upper water gap 5 is divided into two types, one type is that the bottom of the upper water gap 5 is provided with an upper water gap zirconium core 17, and the second type is that the bottom of the upper water gap 5 is not provided with the upper water gap zirconium core 17.
Further, the diameter of the lower nozzle bowl opening 14 is 1.5-2 times of the diameter of the lower end face of the lower nozzle zirconium core 10.
Further, the diameter of the lower nozzle bowl opening 14 is 1.1-1.5 times of the diameter of the lower part 15 of the zirconium core of the upper nozzle.
Furthermore, the flatness of the upper nozzle boss 8 and the lower nozzle flange 12 is between 0.1 and 0.5 mm.
Further, the upper nozzle 1 and the lower nozzle 2 are tightly connected with a convex edge 12 of the lower nozzle through an upper nozzle boss 8.
Furthermore, the apparent porosity of the upper nozzle zirconium core 7 and the lower nozzle zirconium core 10 is less than or equal to 18%, the volume density is greater than or equal to 5.1 g/cc, the apparent porosity of the upper nozzle body 6 and the lower nozzle body 9 is greater than or equal to 22%, and the volume density is greater than or equal to 2.4 g/cc.
Further, the material of the upper nozzle zirconium core 7 and the lower nozzle zirconium core 10 is zirconia.
Further, the upper nozzle body 6 and the lower nozzle body 9 are made of aluminum magnesium material.
Compared with the prior art, the invention has the advantages that: the thickness of the lower nozzle bowl opening is increased, so that the area of the upper end surface of the zirconium core of the lower nozzle bowl opening is larger than that of the lower end surface of the zirconium core of the upper nozzle, the effective combination area of the upper end surface and the lower end surface of the zirconium core of the upper nozzle is increased, the molten steel scouring resistance of a combination part is enhanced, the molten steel is prevented from seeping out from the combination part, the molten steel channel of the lower nozzle is smaller than that of the molten steel channel of the upper nozzle, the flow rate of the molten steel is reduced, the molten steel scouring resistance of the lower nozzle is further enhanced, the lower nozzle is prevented from being reamed and damaged in the molten steel flowing process, the service life of a tundish is further prolonged, in the actual production process, two options can be provided for a customer according to the requirements of the customer, the customer requires that the service life of the upper nozzle is long, the tundish nozzle device with the zirconium core of the upper nozzle at the bottom of the upper nozzle can be provided for the customer, the tundish device with the zirconium core of the, avoiding the waste of cost. The service life of the tundish device provided by the invention is 1.3-1.5 times that of the conventional tundish, so that the tundish is prevented from being frequently replaced, the labor intensity is reduced, the production efficiency is improved, and the service life of continuous casting steel is prolonged.
Drawings
FIG. 1 is a schematic structural diagram of a long-life combined tundish nozzle device of the invention, in which the bottom of an upper nozzle is provided with an upper nozzle zirconium core;
FIG. 2 is a schematic structural view of a long-life combined tundish nozzle device without an upper nozzle zirconium core at the bottom of the upper nozzle
In the figure: 1. a water feeding port; 2. a water outlet; 3. brick setting; 4. a quick-change structure; 5. feeding an upper water gap; 6. a water feeding port body; 7. a water feeding port zirconium core; 8. a water feeding port boss; 9. a lower nozzle body; 10. a zirconium core of the lower nozzle; 11. a lower nozzle boss; 12. a convex edge of the lower nozzle; 13. a molten steel channel at the lower water gap; 14. a lower nozzle bowl opening; 15. the lower part of the zirconium core of the water feeding port; 16. a molten steel channel of the water feeding port; 17. and the upper water gap is a zirconium core.
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 diagram of a long-life combined tundish nozzle device of the invention, in which the bottom of an upper nozzle is provided with an upper nozzle zirconium core; fig. 2 is a schematic structural view of a long-life combined tundish nozzle device of the present invention, in which no zirconium core is arranged at the bottom of an upper nozzle, and as shown in fig. 1, an embodiment of the present invention provides a long-life combined tundish nozzle device, including: the upper nozzle 1 comprises an upper nozzle body 6, an upper nozzle zirconium core 7, an upper nozzle boss 8, an upper nozzle zirconium core lower part 15 and an upper nozzle molten steel channel 16, the lower nozzle 2 comprises a lower nozzle body 9, a lower nozzle zirconium core 10, a lower nozzle boss 11, a lower nozzle convex edge 12, a lower nozzle bowl 14 and a lower nozzle molten steel channel 13, the upper nozzle 1 is tightly connected with the lower nozzle 2, the central lines of the upper nozzle zirconium core 7 and the lower nozzle zirconium core 10 are superposed, the upper nozzle zirconium core 7 is fixed in the upper nozzle body 6 in an embedded mode, the lower nozzle zirconium core 10 is fixed in the lower nozzle body 9 in an embedded mode, the diameter of the upper nozzle molten steel channel 16 is larger than that of the lower nozzle molten steel channel 13, and the inner diameter of the lower nozzle bowl 10 is larger than that of the upper nozzle zirconium core lower part 15, the shape of the zirconium core 10 of the lower nozzle is T-shaped.
According to the long-life combined tundish nozzle device provided by the embodiment of the invention, the upper nozzle zirconium core 7 is in a truncated cone shape, and the diameter of the upper end surface of the upper nozzle zirconium core 7 is 0.9-1.0 times of that of the lower end surface.
According to the long-life combined tundish nozzle device provided by the embodiment of the invention, the upper nozzle 5 is divided into two types, wherein one type is that the bottom of the upper nozzle 5 is provided with the upper nozzle zirconium core 17, and the second type is that the bottom of the upper nozzle 5 is not provided with the upper nozzle zirconium core 17.
According to the long-life combined tundish nozzle device provided by the embodiment of the invention, the diameter of the lower nozzle bowl opening 14 is 1.5-2 times that of the lower end surface of the lower nozzle zirconium core 10.
According to the long-life combined tundish nozzle device provided by the embodiment of the invention, the diameter of the lower nozzle bowl opening 14 is 1.1-1.5 times that of the lower part 15 of the upper nozzle zirconium core.
The long-life combined tundish nozzle device provided by the embodiment of the invention has the advantages that the flatness of the upper nozzle boss 8 and the lower nozzle flange 12 is 0.1-0.5 mm.
The embodiment of the invention provides a long-life combined tundish nozzle device, wherein an upper nozzle 1 and a lower nozzle 2 are tightly connected together through an upper nozzle boss 8 and a lower nozzle convex edge 12.
According to the long-life combined tundish nozzle device provided by the embodiment of the invention, the apparent porosity of the upper nozzle zirconium core 7 and the lower nozzle zirconium core 10 is less than or equal to 18%, the volume density is more than or equal to 5.1 g/cc, the apparent porosity of the upper nozzle body 6 and the lower nozzle body 9 is more than or equal to 22%, and the volume density is more than or equal to 2.4 g/cc.
In the combined tundish nozzle device with a long service life provided by the embodiment of the invention, the upper nozzle zirconium core 7 and the lower nozzle zirconium core 10 are made of zirconium oxide.
In the long-life combined tundish nozzle device provided by the embodiment of the invention, the upper nozzle body 6 and the lower nozzle body 9 are made of aluminum-magnesium materials.
The beneficial effects of the invention include: the thickness of the lower nozzle bowl opening is increased, so that the area of the upper end surface of the zirconium core of the lower nozzle bowl opening is larger than that of the lower end surface of the zirconium core of the upper nozzle, the effective combination area of the upper end surface and the lower end surface of the zirconium core of the upper nozzle is increased, the molten steel scouring resistance of a combination part is enhanced, the molten steel is prevented from seeping out from the combination part, the molten steel channel of the lower nozzle is smaller than that of the molten steel channel of the upper nozzle, the flow rate of the molten steel is reduced, the molten steel scouring resistance of the lower nozzle is further enhanced, the lower nozzle is prevented from being reamed and damaged in the molten steel flowing process, the service life of a tundish is further prolonged, in the actual production process, two options can be provided for a customer according to the requirements of the customer, the customer requires that the service life of the upper nozzle is long, the tundish nozzle device with the zirconium core of the upper nozzle at the bottom of the upper nozzle can be provided for the customer, the tundish device with the zirconium core of the, avoiding the waste of cost. The service life of the tundish device provided by the invention is 1.3-1.5 times that of the conventional tundish, so that the tundish is prevented from being frequently replaced, the labor intensity is reduced, the production efficiency is improved, and the service life of continuous casting steel is prolonged.
It should be understood that the above-mentioned embodiments are only illustrative of the technical concepts 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 not to limit the protection scope of the present invention. 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 (10)
1. The utility model provides a long-life combination formula middle package mouth of a river device which characterized in that: the rapid-change nozzle comprises an upper nozzle (1), a lower nozzle (2), a brick cup (3), a rapid-change structure (4) and an upper nozzle (5), wherein the upper nozzle (1) is divided into an upper nozzle body (6), an upper nozzle zirconium core (7), an upper nozzle boss (8), an upper nozzle zirconium core lower part (15) and an upper nozzle molten steel channel (16), the lower nozzle (2) is divided into a lower nozzle body (9), a lower nozzle zirconium core (10), a lower nozzle boss (11), a lower nozzle convex edge (12), a lower nozzle bowl opening (14) and a lower nozzle molten steel channel (13), the upper nozzle (1) is tightly connected with the lower nozzle (2), the central lines of the upper nozzle zirconium core (7) and the lower nozzle zirconium core (10) are superposed, the upper nozzle zirconium core (7) is fixed in the upper nozzle body (6) in an embedded manner, and the lower nozzle zirconium core (10) is fixed in the lower nozzle body (9) in an embedded manner, the diameter of the upper nozzle molten steel channel (16) is larger than that of the lower nozzle molten steel channel (13), the inner diameter of the lower nozzle bowl opening (10) is larger than that of the lower part (15) of the upper nozzle zirconium core, and the lower nozzle zirconium core (10) is T-shaped.
2. The long life modular tundish nozzle assembly of claim 1, wherein: the shape of the upper nozzle zirconium core (7) is a truncated cone, and the diameter of the upper end surface of the upper nozzle zirconium core (7) is 0.9-1.0 times of that of the lower end surface.
3. The long life modular tundish nozzle assembly of claim 1, wherein: the upper water gap (5) is divided into two types, one type is that the bottom of the upper water gap (5) is provided with an upper water gap zirconium core (17), and the second type is that the bottom of the upper water gap (5) is not provided with the upper water gap zirconium core (17).
4. The long life modular tundish nozzle assembly of claim 1, wherein: the diameter of the lower nozzle bowl opening (14) is 1.5-2 times of the diameter of the lower end face of the lower nozzle zirconium core (10).
5. The long life modular tundish nozzle assembly of claim 1, wherein: the diameter of the lower nozzle bowl opening (14) is 1.1-1.5 times of the diameter of the lower part (15) of the upper nozzle zirconium core.
6. The long life modular tundish nozzle assembly of claim 1, wherein: the flatness of the upper nozzle boss (8) and the lower nozzle convex edge (12) is between 0.1 and 0.5 mm.
7. The long life modular tundish nozzle assembly of claim 1, wherein: the upper nozzle (1) and the lower nozzle (2) are tightly connected together through an upper nozzle boss (8) and a lower nozzle convex edge (12).
8. The long life modular tundish nozzle assembly of claim 1, wherein: the apparent porosity of the upper nozzle zirconium core (7) and the lower nozzle zirconium core (10) is less than or equal to 18%, the volume density is more than or equal to 5.1 g/cc, the apparent porosity of the upper nozzle body (6) and the lower nozzle body (9) is more than or equal to 22%, and the volume density is more than or equal to 2.4 g/cc.
9. The long life modular tundish nozzle assembly of claim 1, wherein: the upper nozzle zirconium core (7) and the lower nozzle zirconium core (10) are made of zirconium oxide.
10. The long life modular tundish nozzle assembly of claim 1, wherein: the upper nozzle body (6) and the lower nozzle body (9) are made of aluminum-magnesium materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010593367.4A CN111590064A (en) | 2020-06-27 | 2020-06-27 | Long-life combined tundish nozzle device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010593367.4A CN111590064A (en) | 2020-06-27 | 2020-06-27 | Long-life combined tundish nozzle device |
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| Publication Number | Publication Date |
|---|---|
| CN111590064A true CN111590064A (en) | 2020-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010593367.4A Pending CN111590064A (en) | 2020-06-27 | 2020-06-27 | Long-life combined tundish nozzle device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113458376A (en) * | 2021-07-14 | 2021-10-01 | 湖州屹鑫节能材料科技有限公司 | Preparation process of quick-change water gap combined structure and machining die thereof |
-
2020
- 2020-06-27 CN CN202010593367.4A patent/CN111590064A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113458376A (en) * | 2021-07-14 | 2021-10-01 | 湖州屹鑫节能材料科技有限公司 | Preparation process of quick-change water gap combined structure and machining die thereof |
| CN113458376B (en) * | 2021-07-14 | 2022-09-30 | 湖州屹鑫节能材料科技有限公司 | Preparation process of quick-change water gap combined structure and machining die thereof |
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