CN216192476U - Steel-making ladle capable of improving bottom blowing air permeability - Google Patents
Steel-making ladle capable of improving bottom blowing air permeability Download PDFInfo
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- CN216192476U CN216192476U CN202122538235.4U CN202122538235U CN216192476U CN 216192476 U CN216192476 U CN 216192476U CN 202122538235 U CN202122538235 U CN 202122538235U CN 216192476 U CN216192476 U CN 216192476U
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Abstract
The utility model aims to provide a steel-making ladle capable of improving bottom blowing air permeability, which comprises a ladle, wherein the ladle is of a hollow inverted frustum structure and is used for containing molten steel, the bottom surface of the ladle is formed by laying bottom bricks, seat bricks and air bricks are arranged at intervals on the bottom surface of the ladle, the surfaces of the seat bricks, which are in contact with the molten steel, and the surfaces of the air bricks, which are in contact with the molten steel, are not in the same plane with the inner surfaces of the bottom bricks, and form a concave-convex layout. The problem of current ladle bottom blowing ventilation effect poor is solved.
Description
Technical Field
The utility model belongs to the technical field of steel ladle structures, and particularly relates to a steel-making steel ladle capable of improving bottom blowing air permeability.
Background
In the steel manufacturing industry, the bottom blowing technology of the steel-making ladle is commonly used, and the bottom blowing technology has the important functions of homogenizing the components and the temperature of molten steel, promoting the floating of inclusions, removing gas, providing sufficient dynamic conditions for refining molten steel and the like, and steel-making and molten steel refining technological processes such as converter furnace back tapping, ladle argon blowing station, LF ladle refining furnace, RH vacuum treatment and the like all adopt ladle bottom blowing operation. If the production raw material conditions are general and the slag carrying amount is high, the ladle bottom blowing effect is poor.
The tradition improves blowback method of end-blown permeability, it presss from both sides the steel to air brick brickwork joint to utilize high-pressure air's oxygen, press from both sides the sediment and sweep by force, reach the mediation brickwork joint, improve the purpose of end-blown effect, brickwork joint presss from both sides the steel can be because the oxygen in the air is combustion-supporting, the physical form can be turned into microparticle or liquid by solid-state, clear up more easily, but the slag is because the melting point is high, the adhesion is strong, difficult clearance, the event causes the poor reason of end-blown effect, it causes to get into air brick brickwork joint for the slag mostly.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a steel-making ladle with improved bottom blowing air permeability, which aims to solve the problem of poor bottom blowing effect of the conventional ladle.
The utility model adopts the following technical scheme: a steel-making ladle capable of improving bottom blowing air permeability comprises a ladle, wherein the ladle is of a hollow inverted cone structure and is used for containing molten steel, the bottom surface of the ladle is formed by laying ladle bottom bricks, a brick cup is arranged on the bottom surface of the ladle, and two air bricks are arranged on two sides of the brick cup at intervals; the brick cup is of a cylindrical structure, an upper section through hole for fixing an upper nozzle and a lower section through hole for fixing a lower nozzle are formed in the brick cup, and the upper section through hole is communicated with the lower section through hole; the air brick is of a cylindrical structure, and a conical through hole for introducing argon is formed in the air brick; the surface of the brick cup contacted with the molten steel, the surface of the air brick contacted with the molten steel and the inner surface of the bottom brick are not in the same plane so as to form concave-convex layout. .
Furthermore, the surface of the seat brick contacted with the molten steel is lower than the inner surface of the bottom brick.
Furthermore, the surface of the air brick contacting with the molten steel is lower than the inner surface of the bottom brick.
The utility model has the beneficial effects that: according to the utility model, the concave-convex layout of the ladle bottom is realized through the height difference of the air brick, the nozzle pocket brick and the ladle bottom brick, and the contact between steel slag and the air brick is reduced, so that the steel slag is prevented from entering the air brick seam to block the air brick, and the effect of improving the bottom blowing ventilation of the ladle is finally achieved.
Drawings
FIG. 1 is a schematic structural view of a steelmaking ladle according to the present invention with improved bottom-blown permeability;
fig. 2 is a sectional view a-a of fig. 1.
Wherein, 1, bottom brick wrapping, 2, brick cup and 3, air brick.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The utility model provides a steel-making ladle capable of improving bottom blowing air permeability, which comprises a ladle, wherein the ladle is in a hollow inverted frustum structure and is used for containing molten steel. The ladle is used as an intermediate container between a steel making process and a pouring process, and is a container for transporting and pouring molten steel. The bottom surface of the ladle is formed by laying ladle bottom bricks 1,
a seat brick 2 is arranged on the bottom surface of the ladle, and two air bricks 3 are arranged at two sides of the seat brick 2 at intervals; the brick cup 2 is of a cylindrical structure, an upper section through hole for fixing an upper nozzle and a lower section through hole for fixing a lower nozzle are formed in the brick cup, and the upper section through hole is communicated with the lower section through hole; the air brick 3 is of a cylinder structure, and a conical through hole for introducing argon is formed in the air brick; as shown in fig. 2, the surface of the brick cup 2 contacting the molten steel and the surface of the gas permeable brick 3 contacting the molten steel are not in the same plane with the inner surface of the bottom brick 1, so as to form a concave-convex layout.
In some embodiments, as shown in fig. 2, the surface of the brick cup 2 contacting the molten steel is lower than the inner surface of the bottom brick 1.
In some embodiments, the surface of the gas permeable brick 3 contacting the molten steel is lower than the inner surface of the bottom brick 1. For example, the height of the bottom brick, the height of the seat brick and the height of the air brick may be 430mm, 400mm and 430mm, respectively.
The steel-making ladle with the improved bottom blowing air permeability provided by the utility model is used in the following process: in the ferrous metallurgy process, one end of the steel ladle is connected with an external bottom blowing pipe of the air brick 3 through a metal hose, and the other end is communicated with medium-pressure argon. When the ladle blows argon, argon enters the molten steel through the air brick 3 to form a large amount of small bubbles, and the molten steel is pushed to move up and down in the upward floating process of the argon bubbles to stir the molten steel, so that the components and the temperature of the molten steel are uniform. The surface of the finely dispersed argon bubble is in contact with nonmetallic inclusions in molten steel, the inclusions are adsorbed by the argon bubble and float to the molten steel surface to be removed, and when the argon bubble drives the molten steel to flow, the inclusions in the molten steel flow along with the molten steel and are continuously absorbed at the interface of steel and slag, which is also a main mode for removing the inclusions in a steel ladle.
The ladle bottom repairing process in the prior art is parallel construction, namely, a ladle bottom brick 1, a gas permeable brick 3, a seat brick 2 and the upper end surface of a water gap are in the same plane. Because the densities and melting points of the molten steel and the steel slag are different, the molten steel and the steel slag in the steel ladle are in a layered state, the molten steel and the slag liquid can be adhered to the surface of the bottom-blowing air brick along with the reduction of the liquid level of the molten steel in the last stage of continuous casting and steel pouring of the steel ladle containing the molten steel, and simultaneously, the steel slag is more easily in a solid state because the melting point of the steel slag is higher than that of the molten steel, solid steel slag particles which are difficult to melt can be formed when the steel slag enters the brick joints of the bottom-blowing air brick, so that the brick joints are blocked, and the argon blowing effect is influenced. In addition, as the molten steel and the steel slag are in an integral plane, the ladle bottom is easy to form large solidified slag and is difficult to pour out, slag accumulation of a ladle can be caused in the long term, the end point temperature and the component control of the converter are influenced, and even production interruption can be caused.
The concave-convex layout of the ladle bottom of the ladle is realized through the height difference of the air brick 3, the seat brick 2 and the ladle bottom brick 1. By utilizing the characteristic of separating the molten steel from the steel slag in the steel ladle, the pits of the air brick 3 can store certain molten steel to cover the surface of the air brick, so that the contact between the steel slag and the air brick is reduced, and the air brick is protected. Molten steel flows through the pocket of the nozzle of the brick cup under the gravity state, which is beneficial to the outflow of the molten steel at the later stage of pouring and reduces the residual pouring phenomenon of the ladle. In addition, the pit design is equivalent to the partition of the ladle bottom of the ladle, the local stress of the ladle is uneven, the pit has the function of dividing the ladle bottom slag, the formation of large steel slag is reduced, the slag pouring of the ladle is facilitated, the quality of molten steel is improved, and the production rhythm is stabilized.
The utility model achieves the purpose of improving the air permeability of the bottom blowing effect of the steel ladle by changing the structural layout of the ladle bottom under the condition of no additional equipment investment. The steel ladle bottom building process is ingeniously optimized by utilizing the separation characteristic of the molten steel and the steel slag in the steel ladle to form a concave-convex layout, the purposes of isolating the steel slag, protecting the air brick and improving the air permeability benefit are achieved, the flowing of the molten steel is promoted, the residual pouring of the steel ladle is reduced, the accumulation of the steel slag caused by the formation of large steel slag is avoided, the quality of the molten steel is improved, and the smooth production is ensured.
Claims (3)
1. The steelmaking ladle capable of improving the bottom blowing air permeability is characterized by comprising a ladle, wherein the ladle is of a hollow inverted frustum cone structure and is used for containing molten steel, the bottom surface of the ladle is formed by paving bottom brick (1), the bottom surface of the ladle is provided with a seat brick (2), and two sides of the seat brick (2) are provided with two air bricks (3) at intervals; the brick cup (2) is of a cylindrical structure, an upper section through hole for fixing an upper nozzle and a lower section through hole for fixing a lower nozzle are formed in the brick cup, and the upper section through hole is communicated with the lower section through hole; the air brick (3) is of a cylindrical structure, and a conical through hole for introducing argon is formed in the air brick; the surface of the brick cup (2) contacted with the molten steel, the surface of the gas permeable brick (3) contacted with the molten steel and the inner surface of the bottom covering brick (1) are not in the same plane, so as to form a concave-convex layout.
2. The steelmaking ladle with improved bottom-blown permeability according to claim 1, characterized in that the surface of said brick cup (2) in contact with said molten steel is lower than the inner surface of said brick cup (1).
3. The steelmaking ladle with improved bottom-blown permeability according to claim 1 or 2, characterized in that the surface of the gas permeable brick (3) in contact with the molten steel is lower than the inner surface of the ladle bottom brick (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122538235.4U CN216192476U (en) | 2021-10-21 | 2021-10-21 | Steel-making ladle capable of improving bottom blowing air permeability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122538235.4U CN216192476U (en) | 2021-10-21 | 2021-10-21 | Steel-making ladle capable of improving bottom blowing air permeability |
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| Publication Number | Publication Date |
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| CN216192476U true CN216192476U (en) | 2022-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122538235.4U Active CN216192476U (en) | 2021-10-21 | 2021-10-21 | Steel-making ladle capable of improving bottom blowing air permeability |
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| CN (1) | CN216192476U (en) |
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2021
- 2021-10-21 CN CN202122538235.4U patent/CN216192476U/en active Active
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