JPS6245801Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a tundish for continuous casting, and its purpose is to provide a tundish for continuous casting that can be commonly used for casting different strands such as beam blanks, slags, blooms, and billets. Still another object is to provide a tundish for continuous casting (hereinafter simply referred to as tundish) which can quickly prepare for injection when casting different types of strands and has excellent birthability.

As shown in FIG. 1, a conventional well-known tundish 100 has, for example, three injection nozzles 3a, 3b, 3c and 3d, 3e, 3f centered on central axis extension lines 2, 2 of beam blank molds 1, 1, respectively.
are arranged symmetrically, and when casting beam blank strands, injection nozzles 3b and 3e are closed and blinded as shown in Fig. 2, and beam blanks are poured from injection nozzles 3a, 3c, 3d, and 3f. Inject into molds 1, 1, and when injecting bloom strands, turn 3b, 3e open and 3a, 3c, 3d, 3f closed, as shown in Figure 3, and inject into bloom molds 4, 4. 20 indicated by a dashed line is a ladle, and 21 is a ladle injection nozzle.

By the way, if there are a large number of injection nozzles, not only equipment costs but also maintenance costs will increase, and it will take time and effort to attach and remove the stopper or sliding nozzle (not shown) provided for each injection nozzle. This method has the disadvantage that a complicated device must be installed in the space, which impairs work efficiency.

Therefore, the present inventors provided support beams 6a, 6b on the tundish side walls 5, 5 as shown in FIG.
The tundish 100 is movably supported by support stands 8a and 8b having 7b, and then a drive device 9 (for example, a hydraulic cylinder) that can be pulled freely is attached to one end of the support beam 6a so that the tundish 100 can be moved left and right as shown in the figure. It has a structure in which the positions of 100 injection nozzles can be varied. FIG. 4 shows the injection nozzle 10 centered on the central axis extension lines 2, 2 of the beam blank molds 1, 1.
In the case of a beam blank strand, in which molten steel is simultaneously injected into the symmetrically arranged strands a, 10b, 10c, and 10d, stable quality can be obtained by injecting the molten steel into the respective flange-corresponding parts of the beam blank. After casting the beam blank strand in this way, when casting the bloom strand, as shown in FIG.
A shift device consisting of support beams 6a, 6b and a drive device 9 moves the tundish 100 to the left in the figure, closes the injection nozzles 10a, 10c, and moves the injection nozzles 10b, 10d to the center axis extension lines 11, 11 of the bloom molds 4, 4. Place it in place.
In other words, the central axis extension lines 11, 11 coincide with the center position (cross-sectional center) of the bloom strand, and the best quality result can be obtained by injecting molten steel at this center position. At this time, the injection nozzle 10a, 1
0c is removed in advance and the injection port of the tundish 100 is closed to facilitate the work. The center position is referred to as the set injection position in the present invention. In the present invention, the space for closing the injection port is wider than that in the example shown in FIG. 1, which has the effect of making the work much easier.

Therefore, the shift device of the present invention is not limited to the above-mentioned embodiments, and can be applied to, for example, the tundish tray 100.
A rail can be provided in the longitudinal direction on the side wall of the tundish, and the tundish 100 can be suspended and moved via a hanging ring, or a hydraulic cylinder can be used to slide the tundish 100 mounted on the rail. I can do it.

As mentioned above, the present invention is convenient for casting specific casting strands such as beam blanks and slag.
In addition, it has the advantage of being able to quickly handle the casting of cast strands such as blooms and billets, and has low equipment costs and excellent workability.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of a conventional tundish for continuous casting, FIGS. 2 and 3 are schematic illustrations of conventional casting procedures, respectively, and FIG. Figure 5 is a schematic explanatory diagram of the casting procedure. In the figure, 1, 1: beam blank mold, 3a
~3f: injection nozzle, 4, 4: bloom mold, 5: side wall, 6a, 6b: support beam, 7a,
7b: Support roller, 8a, 8b: Support stand, 9: Drive device, 10a to 10d: Injection nozzle, 20: Ladle.

Claims (1)

[Scope of utility model registration request] A continuous casting tundish equipped with a plurality of injection nozzles capable of simultaneously injecting into a specific casting strand, wherein a shift device is provided so that any one of the injection nozzles can be positioned at a set injection position of a different casting strand. A tundish for continuous casting that is movably supported through.