JPH0750040Y2 - Tundish for continuous casting - Google Patents

Description

[Detailed description of the device]

[0001]

[Field of Industrial Application] The present invention relates to a tundish used for continuous casting, and when the residual molten steel and molten slag after casting are overturned and discharged, through a gap formed on a mating surface between a container body and a lid. The present invention relates to a tundish for continuous casting having a structure capable of preventing steel leakage.

[0002]

2. Description of the Related Art In continuous casting, molten steel and slag remaining in the tundish are generally discharged after being solidified. Or in the hot repeated use of tundish,
Generally, the tundish is tilted in the longitudinal direction with molten steel and slag, or is discharged from a slide valve installed in the tundish. In these cases,
Even if there is a gap between the tundish body and the lid, the steel and slag that have melted in this part will not flow.

[0003]

On the other hand, there is a method of discharging the residual molten steel and slag by overturning the tundish during hot repeated use of the tundish. With this method,
Since the residual molten steel and slag tilts laterally and at the same time it flows out over a wide area on the lateral inner surface of the tundish, it is necessary to enlarge the slag outlet. The degree (sealing property) deteriorates. On the contrary, if the slag outlet 3 is made smaller as shown in FIG.
However, there is a possibility that residual molten steel and slag will leak from the mating surfaces other than the slag outlet 3 of the main body 2 and the lid 1, which is unsafe and may cause a fire.

The present invention has been made to solve the above problems, and its purpose is to prevent leakage of molten steel and slag from the mating surfaces of the container body and the lid. As a result, it is possible to smoothly discharge the residual molten steel and slag from the slag port having an appropriate cross-sectional area, and to improve the degree of sealing and the sealing property.

[0005]

In order to achieve the above object, the continuous casting tundish according to the present invention is made of iron skin and refractory, and has a short tubular slag outlet at the upper edge of the side wall. A container provided with a projecting eave-shaped top wall integrally formed with the side wall for guiding the residual steel at the time of rollover and slag to the slag port, and an opening at the side thereof. The main body and a lid that is flush with the top wall and seals the opening are formed.

[0006]

According to the present invention, the lid does not cover the entire top surface, but the top wall is flush with the top surface to cover a part of the top surface. Since it is located on the upper surface side, molten steel and slag will not leak from this mating surface when the tundish is rolled over.

Further, since the intersecting surface of the top wall and the inner wall functions as a guide for guiding the residual molten steel and slag to the slag port, the slag port can be discharged smoothly even if it is small. Therefore, it is possible to improve the degree of sealing and the sealing property.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view of a tundish according to an embodiment of the present invention, in which a is an external perspective view and b is a sectional side view of the tundish shown in a.

The tundish comprises a lid 1 and a container body 2. The container main body 2 is made of iron skin and refractory, and a short cylindrical slag outlet 3 is provided at the upper edge of the lateral inner wall, and the residual molten steel and slag at the time of rollover slag is removed from the slag outlet 3 Eave-shaped top wall 4 integrated with the side wall for guiding
And an opening 5 is formed at the side of the top.

The top wall 4 extends inward from the side wall provided with the slag outlet 3 in an eaves-like shape, and its end edge portion is located substantially at the center of the top portion. On the other hand, the lid 1 is formed in a rectangular flat plate, and is placed on the opening 5 so as to be flush with the top wall 4 and seal the opening 5.

The tundish having such a structure is used for continuous casting. After the molten steel is poured from the slide nozzle and the predetermined continuous casting is completed, the tundish is rolled over and the residual molten steel and molten slag are discharged from the slag outlet 3. Since the mating surface between the lid 1 and the top wall 4 is located above the slag outlet 3 when discharging the slag, no leakage of the residual molten steel or slag from this point occurs.

On the other hand, with respect to the slag port 3, the intersection of the top wall 4 and the inner wall functions as a guide for guiding the residual molten steel and slag to the slag port 3, so that the slag port 3 is small. It can be discharged smoothly. In this way, there is no leakage and the slag outlet 3
It is possible to reliably and smoothly guide the residual molten steel and molten slag.

[0013]

As described above, according to the present invention, it is possible to eliminate steel leakage from the mating surface of the container body and the lid of the tundish. Further, the slag outlet of the tundish can be formed small, and the degree of sealing and the sealing property can be improved.

[Brief description of drawings]

1 is an explanatory view of a tundish according to an embodiment of the present invention, in which a is an external perspective view and b is a sectional side view of the tundish shown in a.

FIG. 2 is a front view of a conventional tundish.

FIG. 3 is a perspective view showing a state in which the tundish shown in FIG.

[Explanation of symbols]

1: Tundish lid 2: Tundish container body 3: Dust outlet 4: Top wall 5: Opening 6: Sliding nozzle

Claims (1)

[Scope of utility model registration request] 1. A steel pipe and a refractory material, and a short-tube-shaped slag outlet is projectingly provided on an upper edge portion of the sidewall, and the side wall is introduced to the residual steel at the time of rollover slag to the slag outlet. A container main body having an integrally formed eave-shaped top wall and an opening formed at the side thereof at the top, and a lid that is flush with the top wall and seals the opening. Tundish for continuous casting characterized by