CN112756598A - Flushing-resistant wear-resistant ultra-long-life tundish water feeding port - Google Patents
Flushing-resistant wear-resistant ultra-long-life tundish water feeding port Download PDFInfo
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- CN112756598A CN112756598A CN202110074279.8A CN202110074279A CN112756598A CN 112756598 A CN112756598 A CN 112756598A CN 202110074279 A CN202110074279 A CN 202110074279A CN 112756598 A CN112756598 A CN 112756598A
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- China
- Prior art keywords
- sliding plate
- resistant
- zirconium
- upper body
- 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
- B22D41/14—Closures
- B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
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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
- B22D41/14—Closures
- B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
- B22D41/28—Plates therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a rinsing-resistant and wear-resistant tundish water feeding port with an ultra-long service life, which comprises: comprises a tundish upper nozzle body and an iron shell, wherein the tundish upper nozzle body is divided into a slide plate surface body, a slide plate surface zirconium surface and an upper body, an upper body zirconia core and a molten steel channel, the upper body zirconia core is positioned in the inner cavity of the tundish upper nozzle body, the bottom of the upper nozzle is clamped in an inner cavity of the zirconium surface of the sliding plate, the zirconium surface of the sliding plate is of a circular structure, and the flatness of the zirconium surface of the sliding plate, the zirconia core of the upper body and the assembled sliding plate body is 0.05-0.2.
Description
Technical Field
The invention relates to the technical field of continuous casting processing of refractory materials, in particular to a flushing-resistant wear-resistant tundish water feeding port with an ultra-long service life.
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. The tundish nozzle is composed of an upper nozzle, a lower nozzle, a stopper rod and an immersion nozzle, when steel is continuously cast, a zirconium core is usually embedded in the inner sides of bodies of the upper nozzle and the lower nozzle in the prior art, the contact area of the zirconium core of the upper nozzle and the lower nozzle is small, the performances of molten steel scouring resistance, wear resistance and molten slag erosion resistance are poor, the contact position of the upper nozzle and the lower nozzle is easily damaged due to the scouring of the molten steel, the service life is short, the steel splitting event is easily caused, and potential safety hazards exist.
The invention solves the technical problems by providing the rinsing-resistant and wear-resistant tundish water feeding port with the ultra-long service life, has the advantages of molten steel scouring resistance, slag erosion resistance and excellent wear resistance, solves the node problem which puzzles long-time continuous casting of a continuous casting machine, reduces the labor intensity and the steel-making production cost, and meets the production requirement of steel-making continuous casting.
Disclosure of Invention
The invention aims to overcome the technical problems that in the prior art, zirconium cores are usually embedded in the inner sides of bodies of an upper nozzle and a lower nozzle, the contact area of the zirconium cores of the upper nozzle and the lower nozzle is small, the performances of molten steel scouring resistance, wear resistance and molten slag erosion resistance are poor, the contact positions of the upper nozzle and the lower nozzle are easily damaged due to the scouring of molten steel, the service life is short, steel splitting events are easily caused, and potential safety hazards exist.
In order to achieve the purpose, the invention adopts the technical scheme that: the tundish upper nozzle comprises a tundish upper nozzle body 1 and an iron shell 2, wherein the tundish upper nozzle body 1 is divided into a sliding plate surface body 3, a sliding plate surface zirconium surface 4, an upper body 5, an upper body zirconium oxide core 6 and a molten steel channel 7, the upper body zirconium oxide core 6 is positioned in the inner cavity of the tundish upper nozzle body 1, the bottom of the upper body zirconium oxide core is clamped in the inner cavity of the sliding plate surface zirconium surface 3, the sliding plate surface zirconium surface 4 is of a circular structure, the sliding plate surface zirconium surface 4 is positioned in the inner cavity of the sliding plate surface body 3, the sliding plate surface zirconium surface 4 is connected with the upper body zirconium oxide core 6, the side view shows a T-shaped structure, the inner cavity of the upper body zirconium oxide core 5 and the inner cavity of the sliding plate surface 3 form the molten steel channel 7, and the flatness of the assembled sliding plate surface zirconium surface 3, the upper body zirconium oxide core 6 and the sliding plate surface body 2 is between 0.
Further, the iron shell 2 is located outside the skateboard surface body 3 and extends to the outside of the upper body 5.
Furthermore, the zirconium surface 4 of the slide plate and the zirconium oxide core 6 of the upper body are made of zirconium oxide material or high-purity zirconium oxide material.
Further, the slide plate surface body 3 and the upper body 5 are of an integral structure.
Further, the diameter of the top opening of the zirconium face 4 of the slide plate is 1 to 3 times of the diameter of the bottom opening, the diameter of the top of the upper body zirconia core 6 is 1 to 3 times of the diameter of the bottom of the zirconium face 4 of the slide plate, and the diameter of the top of the upper body zirconia core 6 is 1 to 3 times of the diameter of the bottom of the upper body zirconia core 6.
Furthermore, the apparent porosity of the slide plate surface body 3 and the apparent porosity of the upper body 5 are less than or equal to 14 percent, and the volume density is more than or equal to 2.6 g/cubic centimeter.
Furthermore, the apparent porosity of the zirconium face 4 and the upper body zirconia core 6 of the slide plate face is less than or equal to 16 percent, and the volume density is more than or equal to 5.1 g/cubic centimeter.
Compared with the prior art, the invention has the advantages that: the advantages of low zirconia gas-developing rate, wear resistance and strong molten steel scouring resistance are utilized, the slide plate surface is designed to be composed of two parts, the middle position of the slide plate surface where the upper nozzle is scoured by molten steel and has more serious wear resistance is manufactured by adopting high-purity zirconia material or zirconia material, other positions of the rest slide plate surface are manufactured by adopting original material with relatively low price, the contact area of the upper nozzle and the lower nozzle is made of zirconia material, the wear resistance and the molten steel scouring resistance of the lower nozzle are enhanced, the occurrence of molten steel chopping events is avoided, the service life of the upper nozzle is prolonged, the whole upper nozzle is manufactured by adopting zirconia in the prior art, the service life is long, the manufacturing cost is high, and the requirements of the prior market can not be met, the tundish upper nozzle provided by the invention solves the node trouble problem of long-time continuous casting of a continuous casting machine, the labor intensity and the steel-making production cost are reduced, the production requirement of steel-making continuous pouring is met, and the potential safety hazard is eliminated.
In conclusion, the service life of the water feeding port is ensured, so that the service life of the water feeding port is consistent with that of a long-time continuous casting tundish in steelmaking continuous casting, the manufacturing cost is saved, the production cost is reduced, the production requirement of steelmaking continuous casting is met, the labor intensity and the steelmaking production cost are reduced, and the production requirement of long-time continuous casting of a steelmaking continuous casting machine is met.
Drawings
FIG. 1 is a schematic view of a structure of a rinsing-resistant and wear-resistant tundish water feeding port of the invention with an ultra-long service life;
FIG. 2 is a schematic view of a quick-change tundish nozzle structure using the rinsing and wear resistant ultra-long life tundish nozzle of the present invention;
in the figure: 1. a tundish upper nozzle body; 2. an iron shell; 3. a skateboard deck body; 4. a zirconium surface of the slide plate; 5. an upper body; 6. an upper bulk zirconia core; 7. a molten steel channel.
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 a rinsing-resistant and wear-resistant super-long-life tundish upper nozzle provided in an embodiment of the present invention, fig. 2 is a schematic structural view of a quick-change tundish upper nozzle using the rinsing-resistant and wear-resistant super-long-life tundish upper nozzle of the present invention, and as shown in fig. 1 and fig. 2, the rinsing-resistant and wear-resistant super-long-life tundish upper nozzle provided in an embodiment of the present invention: the tundish upper nozzle comprises a tundish upper nozzle body 1 and an iron shell 2, wherein the tundish upper nozzle body 1 is divided into a sliding plate surface body 3, a sliding plate surface zirconium surface 4, an upper body 5, an upper body zirconium oxide core 6 and a molten steel channel 7, the upper body zirconium oxide core 6 is positioned in the inner cavity of the tundish upper nozzle body 1, the bottom of the upper body zirconium oxide core is clamped in the inner cavity of the sliding plate surface zirconium surface 3, the sliding plate surface zirconium surface 4 is of a circular structure, the sliding plate surface zirconium surface 4 is positioned in the inner cavity of the sliding plate surface body 3, the sliding plate surface zirconium surface 4 is connected with the upper body zirconium oxide core 6, the side view shows a T-shaped structure, the inner cavity of the upper body zirconium oxide core 5 and the inner cavity of the sliding plate surface 3 form the molten steel channel 7, and the flatness of the assembled sliding plate surface zirconium surface 3, the upper body zirconium oxide core 6 and the sliding plate surface body 2 is between 0.
Preferably, the iron shell 2 is positioned outside the skateboard surface body 3 and extends to the outside of the upper body 5,
preferably, the slide plate zirconium face 4 and the upper body zirconia core 6 are made of zirconia material or high-purity zirconia material.
Preferably, the slide plate surface body 3 and the upper body 5 are of an integral structure.
Preferably, the diameter of the top opening of the zirconium face 4 of the slide plate is 1 to 3 times the diameter of the bottom opening, the diameter of the top of the upper bulk zirconia core 6 is 1 to 3 times the diameter of the bottom of the zirconium face 4 of the slide plate, and the diameter of the top of the upper bulk zirconia core 6 is 1 to 3 times the diameter of the bottom of the upper bulk zirconia core 6.
Preferably, the apparent porosity of the slide plate surface body 3 and the apparent porosity of the upper body 5 are less than or equal to 14 percent, and the volume density is more than or equal to 2.6 g/cubic centimeter.
Preferably, the apparent porosity of the zirconium face 4 and the upper body zirconia core 6 of the slide plate face is less than or equal to 16 percent, and the volume density is more than or equal to 5.1 g/cubic centimeter.
The beneficial effects of the invention include: the advantages of low zirconia gas-developing rate, wear resistance and strong molten steel scouring resistance are utilized, the slide plate surface is designed to be composed of two parts, the middle position of the slide plate surface where the upper nozzle is scoured by molten steel and has more serious wear resistance is manufactured by adopting high-purity zirconia material or zirconia material, other positions of the rest slide plate surface are manufactured by adopting original material with relatively low price, the contact area of the upper nozzle and the lower nozzle is made of zirconia material, the wear resistance and the molten steel scouring resistance of the lower nozzle are enhanced, the occurrence of molten steel chopping events is avoided, the service life of the upper nozzle is prolonged, the whole upper nozzle is manufactured by adopting zirconia in the prior art, the service life is long, the manufacturing cost is high, and the requirements of the current market can not be met, the service life of the tundish upper nozzle provided by the invention is more than 120H, and the production requirement of continuous casting steel is completely met, and potential safety hazards are eliminated.
In conclusion, the service life of the upper nozzle is ensured to be consistent with that of the upper nozzle which is integrally made of zirconia, the manufacturing cost is saved, the production cost is reduced, and the production requirement of continuous casting steel is met.
It should be understood that the above-mentioned embodiments are only illustrative of the technical concept and features of the present invention, and the present invention is not limited to the embodiment, but the present invention can be realized by those skilled in the art. 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 (7)
1. Resistant dashing wear-resisting super long-life package mouth of a river of feeding of rinsing, its characterized in that: comprises a tundish upper nozzle body (1) and an iron shell (2), wherein the tundish upper nozzle body (1) is divided into a slide plate surface body (3), a slide plate surface zirconium surface (4), an upper body (5), an upper body zirconium oxide core (6) and a molten steel channel (7), the zirconia core (6) of the upper body is positioned in the inner cavity of the tundish upper nozzle body (1), the bottom of the slide plate is clamped in the inner cavity of the slide plate zirconium surface (3), the slide plate zirconium surface (4) is of a circular structure, the sliding plate zirconium surface (4) is positioned in the inner cavity of the sliding plate main body (3), the sliding plate zirconium surface (4) is connected with the upper main body zirconia core (6) together, the side view is of a T-shaped structure, the inner cavity of the upper body zirconia core (5) and the inner cavity of the sliding plate surface (3) form a molten steel channel (7), the flatness of the assembled sliding plate surface zirconium surface (3), the upper body zirconium oxide core (6) and the sliding plate surface body (2) is between 0.05 and 0.2.
2. The rinsing-resistant wear-resistant ultra-long life tundish upper nozzle according to claim 1, characterized in that: the iron shell (2) is located on the outer side of the sliding plate surface body (3) and extends to the outer side of the upper body (5).
3. The rinsing-resistant wear-resistant ultra-long life tundish upper nozzle according to claim 1, characterized in that: the sliding plate surface (4) and the upper body zirconia core (6) are made of zirconia materials or high-purity zirconia materials.
4. The rinsing-resistant wear-resistant ultra-long life tundish upper nozzle according to claim 1, characterized in that: the slide plate surface body (3) and the upper body (5) are of an integral structure.
5. The rinsing-resistant wear-resistant ultra-long life tundish upper nozzle according to claim 1, characterized in that: the diameter of the top opening of the zirconium surface (4) of the sliding plate is 1-3 times of the diameter of the bottom opening, the diameter of the top of the upper body zirconia core (6) is 1-3 times of the diameter of the bottom of the zirconium surface (4) of the sliding plate, and the diameter of the top of the upper body zirconia core (6) is 1-3 times of the diameter of the bottom of the upper body zirconia core (6).
6. The rinsing-resistant wear-resistant ultra-long life tundish upper nozzle according to claim 1, characterized in that: the apparent porosity of the sliding plate surface body (3) and the upper body (5) is less than or equal to 14 percent, and the volume density is more than or equal to 2.6 g/cubic centimeter.
7. The rinsing-resistant wear-resistant ultra-long life tundish upper nozzle according to claim 1, characterized in that: the apparent porosity of the zirconium surface (4) of the sliding plate surface and the zirconium oxide core (6) of the upper body is less than or equal to 16 percent, and the volume density is more than or equal to 5.1 g/cc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110074279.8A CN112756598A (en) | 2021-01-22 | 2021-01-22 | Flushing-resistant wear-resistant ultra-long-life tundish water feeding port |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110074279.8A CN112756598A (en) | 2021-01-22 | 2021-01-22 | Flushing-resistant wear-resistant ultra-long-life tundish water feeding port |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112756598A true CN112756598A (en) | 2021-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110074279.8A Pending CN112756598A (en) | 2021-01-22 | 2021-01-22 | Flushing-resistant wear-resistant ultra-long-life tundish water feeding port |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112756598A (en) |
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2021
- 2021-01-22 CN CN202110074279.8A patent/CN112756598A/en active Pending
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