CN215919077U - Long-life tundish - Google Patents
Long-life tundish Download PDFInfo
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- CN215919077U CN215919077U CN202122250540.3U CN202122250540U CN215919077U CN 215919077 U CN215919077 U CN 215919077U CN 202122250540 U CN202122250540 U CN 202122250540U CN 215919077 U CN215919077 U CN 215919077U
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Abstract
A long-life tundish relates to the technical field of refractory materials for steelmaking, in particular to a long-life tundish. The tundish comprises a tundish shell, wherein the tundish shell is of a shell structure with an opening at the upper end, a slag wall is arranged at the upper end in the tundish shell, a permanent lining pouring layer is arranged on the inner wall of the tundish shell, and a working lining dry layer is arranged on the inner wall of the permanent lining pouring layer; the special-shaped magnesia carbon brick is formed by assembling 2 symmetrical special-shaped magnesia carbon half bricks, and a runner hole is formed in the special-shaped magnesia carbon brick; the special-shaped magnesia carbon half bricks are provided with steel flowing grooves, and 2 steel flowing grooves are assembled into steel flowing holes. The utility model has the positive effects of prolonging the service life of the slag wall, effectively purifying molten steel and improving the quality of the molten steel.
Description
Technical Field
The utility model relates to the technical field of refractory materials for steelmaking, in particular to a tundish with a long service life.
Background
The tundish is a refractory container used in short-flow steelmaking. At present, in the traditional process, a steel flowing hole is reserved for flowing molten steel when a slag stopping wall is built, but the aperture of the steel flowing hole is continuously enlarged and is unevenly enlarged under the physical and chemical actions of the molten steel, so that the original aperture and flow of the steel flowing hole through hydraulics simulation and calculation are changed, and the effects of preventing splashing and stably flowing the molten steel cannot be achieved. After the flowing steel hole is continuously enlarged, the strength of the slag blocking wall is reduced, the slag blocking wall is broken and then is damaged by impact, and the service life of the slag blocking wall is 12-15 hours.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a tundish with a long service life, so as to achieve the purposes of prolonging the service life of a slag wall, effectively purifying molten steel and improving the quality of the molten steel.
The long-service-life tundish provided by the utility model comprises a tundish shell, wherein the tundish shell is of a shell structure with an opening at the upper end, the upper end in the tundish shell is provided with a slag-stopping wall, the inner wall of the tundish shell is provided with a permanent lining casting layer, and the inner wall of the permanent lining casting layer is provided with a working lining dry layer; the special-shaped magnesia carbon brick is formed by assembling 2 symmetrical special-shaped magnesia carbon half bricks, and a runner hole is formed in the special-shaped magnesia carbon brick; the special-shaped magnesia carbon half bricks are provided with steel flowing grooves, and 2 steel flowing grooves are assembled into steel flowing holes.
Furthermore, the two symmetrical special-shaped magnesia carbon bricks are symmetrically arranged on the slag blocking wall in an outward splayed shape, and the included angle alpha between the special-shaped magnesia carbon bricks and the slag blocking wall is 35 degrees +/-3 degrees.
Furthermore, the steel flowing groove is semicircular, and the included angle beta between the steel flowing groove and the special-shaped magnesia carbon half brick is 25 +/-5 degrees.
Furthermore, refractory mortar is arranged between the outer side of the special-shaped magnesia carbon brick and the slag-stopping wall; refractory mortar or dry ramming material is arranged between the 2 special-shaped magnesia carbon half bricks.
Further, a flow stabilizer is arranged at the inlet end of the tundish shell, and a porous water gap is formed at the lower end of the tundish shell.
Furthermore, the special-shaped magnesia carbon half-brick is formed by bonding and pressing a magnesia carbon synthetic material with phenolic resin.
Further, the bulk density of the special-shaped magnesia carbon brick is greater than or equal to 2.9g/cm for high-speed harvest.
Furthermore, the special-shaped magnesia carbon half brick is in a cuboid structure with the thickness of 250mm multiplied by 200mm multiplied by 10 mm.
The long-service-life tundish provided by the utility model is characterized in that 2 special-shaped magnesia carbon half bricks are assembled into special-shaped magnesia carbon bricks, and 2 runner steel grooves are assembled into runner steel holes. The special-shaped magnesia carbon bricks are symmetrically arranged on two sides of the slag-stopping wall, the special-shaped magnesia carbon bricks are provided with the steel flowing holes, the special-shaped magnesia carbon bricks have good erosion resistance and corrosion resistance, molten steel flows into the tundish from the steel flowing holes of the special-shaped magnesia carbon bricks, the molten steel is prevented from impacting the slag-stopping wall, the service life of the impacting slag-stopping wall is prolonged to 28-35 hours from 12-15 hours, and the purifying effect of the slag-stopping wall on the molten steel is fully realized. Therefore, the utility model has the positive effects of prolonging the service life of the slag wall, effectively purifying the molten steel and improving the quality of the molten steel.
Drawings
The accompanying drawings disclose, in part, specific embodiments of the present invention, wherein,
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a schematic structural diagram of the special-shaped magnesia carbon half-brick of the utility model.
Detailed Description
As shown in fig. 1-2, the long-life tundish provided by the utility model comprises a tundish shell 1, wherein the tundish shell 1 is of a shell structure with an opening at the upper end, a slag wall 5 is arranged at the upper end inside the tundish shell 1, a permanent lining pouring layer 3 is arranged on the inner wall of the tundish shell 1, a working lining dry layer 4 is arranged on the inner wall of the permanent lining pouring layer 3, and special-shaped magnesia carbon bricks 6 are symmetrically arranged on two sides of the slag wall 5; the special-shaped magnesia carbon brick 6 is assembled by 2 symmetrical special-shaped magnesia carbon half bricks 7, and the special-shaped magnesia carbon brick 6 is provided with a steel flowing hole; the special-shaped magnesia carbon half-brick 7 is provided with steel flowing grooves 9, and the steel flowing grooves 9 are assembled into steel flowing holes by 2 steel flowing grooves 9.
When the utility model is used, firstly, the special-shaped magnesia carbon half-brick 7 is manufactured. The traditional pouring forming is changed into pressing forming, the pressing forming is carried out by a 650-800 ton electric screw press, the pressing tonnage is about 1000-1500 tons, and the pressing tonnage is 7-9 tons, so that the volume density of the special-shaped magnesia carbon half brick 7 can be kept at 2.9g/cm for carrying out thin year and higher year. Then, the special-shaped magnesia carbon half bricks 7 are installed. The traditional masonry reservation type is changed into masonry filling type, 2 symmetrical special-shaped magnesia carbon half bricks 7 are symmetrically formed into special-shaped magnesia carbon bricks 6, 2 runner channels 9 are assembled into runner holes, and the special-shaped magnesia carbon bricks 6 are masonry-filled on two sides of the slag blocking wall 5. Finally, as the special-shaped magnesia carbon bricks 6 have good erosion resistance and corrosion resistance, the molten steel flows into the tundish from the steel flowing holes of the special-shaped magnesia carbon bricks 6, the molten steel is prevented from impacting the slag-stopping wall 5, the service life of the impacting slag-stopping wall 5 is prolonged from 12-15 hours to 28-35 hours, the purification effect of the slag-stopping wall on the molten steel is fully realized, the service life of the slag-stopping wall is obviously prolonged, the molten steel is effectively purified, and the quality of the molten steel is improved.
The two symmetrical special-shaped magnesia carbon bricks 6 are symmetrically arranged on the slag-stopping wall 5 in an splayed shape, and the included angle alpha between the special-shaped magnesia carbon bricks 6 and the slag-stopping wall 5 is 35 degrees +/-3 degrees. Through the hydraulic simulation and the calculated aperture and flow of the steel flowing hole, the special-shaped magnesia carbon brick 6 is reasonably arranged on the slag blocking wall 5, and the effects of preventing splashing and stably flowing molten steel can be achieved.
The runner grooves 9 are semicircular, and 2 semicircular runner grooves 9 are assembled into a circular runner hole. The included angle beta between the steel flowing groove 9 and the special-shaped magnesia carbon half-bricks 7 is 25 degrees +/-5 degrees, and when the molten steel flows out of the steel flowing groove 9, impurities and the molten steel are favorably separated in the air, so that the impurities float on the upper part of the molten steel, the molten steel is effectively purified, and the quality of the molten steel is improved.
And refractory mortar is arranged between the outer side of the special-shaped magnesia carbon brick 6 and the slag-stopping wall 5, so that the special-shaped magnesia carbon brick 6 and the slag-stopping wall 5 are tightly arranged, molten steel is prevented from impacting the slag-stopping wall, and the service life of the slag-stopping wall is prolonged. Refractory mortar or dry ramming mass is arranged between the 2 special-shaped magnesia carbon half bricks 7, so that the 2 special-shaped magnesia carbon half bricks 7 are tightly assembled into the special-shaped magnesia carbon brick 6, molten steel flows into a tundish from a runner hole of the special-shaped magnesia carbon brick 6, the molten steel is effectively purified, and the quality of the molten steel is improved.
The inlet end of the tundish shell 1 is provided with the flow stabilizer 2, and the flow stabilizer 2 can improve the flowing state of the molten steel, slow down the erosion and the scouring of the molten steel to the tundish working lining dry layer, effectively purify the molten steel and improve the quality of the molten steel.
The lower end of the tundish shell 1 is provided with a hole type water gap 8, and the hole type water gap 8 can prevent secondary oxidation and molten steel splashing of tundish injection flow and improve the quality of the molten steel.
The special-shaped magnesia carbon half-brick 7 is formed by bonding and pressing magnesia carbon synthetic materials through phenolic resin. Adopt material and water to stir the mixture than traditional brick, the phenolic resin adhesive is inside to be the network state under high temperature toasts, closely lets the bonding of magnesium carbon synthetic material to promote bulk density, can make the bulk density of firebrick brick body be greater than 2.9g/cm year, strengthen the ability that the steel slag that strikes district work lining dry-type layer corrodes and resists molten steel and erode.
Phenolic resin is used as an adhesive, the phenolic resin adhesive is baked for 13 hours at a high temperature of 200 ℃ to tightly adhere materials, so that the volume density of the special-shaped magnesia carbon half brick 7 is improved, the volume density of the special-shaped magnesia carbon brick 6 is greater than or equal to 2.9g/cm through thin-wall forging, and the special-shaped magnesia carbon brick is strengthened to have good erosion resistance and corrosion resistance.
The special-shaped magnesia carbon half brick 7 has a cuboid structure of 250mm multiplied by 200mm multiplied by 100 mm. By combining the specification design of the slag-stopping wall 5, the special-shaped magnesia carbon half bricks 7 can be better laid and filled on the slag-stopping wall 5, the service life of the slag-stopping wall is prolonged, molten steel is effectively purified, and the quality of the molten steel is improved.
Claims (8)
1. A long-service-life tundish comprises a tundish shell (1), wherein the tundish shell (1) is of a shell structure with an opening at the upper end, a slag blocking wall (5) is arranged at the upper end inside the tundish shell (1), a permanent lining pouring layer (3) is arranged on the inner wall of the tundish shell (1), and a working lining dry layer (4) is arranged on the inner wall of the permanent lining pouring layer (3), and the tundish is characterized in that special-shaped magnesia carbon bricks (6) are symmetrically arranged on two sides of the slag blocking wall (5); the special-shaped magnesia carbon brick (6) is formed by assembling 2 symmetrical special-shaped magnesia carbon half bricks (7), and a steel flowing hole is formed in the special-shaped magnesia carbon brick (6); and the special-shaped magnesia carbon half bricks (7) are provided with steel flowing grooves (9), and 2 steel flowing grooves (9) are assembled into steel flowing holes.
2. A long-life tundish according to claim 1, wherein the two symmetrical special-shaped magnesia carbon bricks (6) are symmetrically arranged on the slag-stopping wall (5) in an outward splayed shape, and the included angle α between the special-shaped magnesia carbon bricks (6) and the slag-stopping wall (5) is 35 ° ± 3 °.
3. A long-life tundish according to claim 1, wherein the runner (9) is semicircular and forms an angle β of 25 ° ± 5 ° with the shaped magnesia carbon half-bricks (7).
4. The long-life tundish according to claim 1, wherein refractory mortar is arranged between the outer side of the special-shaped magnesia carbon brick (6) and the slag-stopping wall (5); refractory mortar or dry ramming mass is arranged between the 2 special-shaped magnesia carbon half bricks (7).
5. A long-life tundish according to claim 1, wherein the inlet end of the tundish housing (1) is provided with a flow stabilizer (2), and the lower end of the tundish housing (1) is provided with a hole-type nozzle (8).
6. The long-life tundish according to claim 1, wherein the shaped magnesia carbon half-bricks (7) are formed by bonding and pressing magnesia carbon composite materials with phenolic resin.
7. The long-life tundish according to claim 1, wherein the profiled magnesia carbon bricks (6) are produced by high-speed rolling at a bulk density of 2.9g/cm or higher.
8. A long-life tundish according to claim 1, wherein the shaped magnesia carbon half-bricks (7) have a rectangular parallelepiped configuration of 250mm x 200mm x 100 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122250540.3U CN215919077U (en) | 2021-09-17 | 2021-09-17 | Long-life tundish |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122250540.3U CN215919077U (en) | 2021-09-17 | 2021-09-17 | Long-life tundish |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215919077U true CN215919077U (en) | 2022-03-01 |
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ID=80417152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122250540.3U Active CN215919077U (en) | 2021-09-17 | 2021-09-17 | Long-life tundish |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215919077U (en) |
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2021
- 2021-09-17 CN CN202122250540.3U patent/CN215919077U/en active Active
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