JP2003260541A - Mold for continuous casting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mold for continuous casting which prevents local damages of the mold wall of the position corresponding to the meniscus part by solving overheat phenomena at the meniscus part in the mold of a continuous casting machine, and can reduce breakout of continuous cast blocks or flawed continuous cast blocks by solving the starting point of uneven solidification affecting the initial steel solidification stage. <P>SOLUTION: In the mold for continuous casting in which a water cooled- jacket 4 having longitudinal partition walls 7 built-in for controlling longitudinal water channels 5 is arranged at the wall part of the mold 1, a diversion channel 10 for short paths 9 is arranged at the longitudinal partition walls 7 of the water cooled jacket 4 at positions 8 corresponding to the meniscus part of the molten steel in the mold 1, allowing the positions 8 corresponding to the meniscus part of all the longitudinal water channels 5 horizontally communicating with each other through the diversion channel 10. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a mold cooling mechanism in a continuous casting apparatus.

[0002]

2. Description of the Related Art The cooling mechanism of a mold in a continuous casting apparatus is a very important factor that determines the initial solidification of steel, and it is more uniform for the purpose of reducing breakout of continuous cast steel pieces and defects of continuous cast steel pieces. A cooling mechanism is being sought.

The mold for continuous casting is generally composed of a rectangular or square copper rectangular mold 1, but in these rectangular molds 1, various cooling mechanisms are used at the corners 3 of the mold 1 where uniform cooling is difficult. The measures are taken by. However, as a cooling mechanism for the straight wall portion 2 other than the corner portion 3 of the rectangular mold, for example,
A mechanism for directly cooling the copper plate of the mold 1 with water and cooling it, or providing a water cooling jacket 4 on the copper plate of the wall plate 12 of the mold 1,
Alternatively, as shown in FIG. 4 or FIG. 5, it is provided on the water cooling jacket 4 in the back plate 13 on the back surface of the copper mold 1 and divided into a large number of vertical partition walls 7 to form vertical water channels 5. As a structure lacking, the vertical water channels 5 are communicated in the horizontal direction above the vertical water channels 5, and a drain port 6 is opened in the mold upper wall on each vertical water channel 5 to drain the cooling water in the water cooling jacket 4. In addition, in FIG. 4 or FIG. 5, the mechanism for handling the drainage discharged from the drainage port 6 is omitted. A general method is to flow cooling water through this vertical water passage 5. When the water cooling mechanism by the water cooling jacket 4 of the mold 1 like the latter is continuously used to some extent, a phenomenon in which the meniscus portion of the molten steel in the mold 1 is overheated may be found.

Such an overheating phenomenon not only induces local wear on the mold wall at the position 8 corresponding to the meniscus portion of the mold 1, but also serves as a starting point of non-uniform solidification affecting the initial solidification of steel.

[0005]

The problem to be solved by the present invention is to eliminate the overheating phenomenon of the meniscus portion in the mold of the continuous casting machine as described above.
Prevents local damage on the mold wall at the position corresponding to the meniscus,
Another object of the present invention is to provide a mold for continuous casting, which can eliminate the starting point of non-uniform solidification that affects the initial solidification of steel, and consequently reduce breakout of continuous cast pieces and defects of continuous cast pieces.

[0006]

Means for Solving the Problems The inventor has diligently studied, and as a means for improving the non-uniform solidification of continuous cast pieces in such continuous casting, as shown in FIG. It has been found that it is effective to provide a short path 9 in the vertical water channel 5, particularly in the vertical water channel 5 at the position 8 corresponding to the meniscus portion in the mold 1 so as to make the temperature at the position corresponding to the meniscus portion on the entire wall surface of the mold uniform.

That is, the means of the present invention for solving the above-mentioned problem is, in the invention of claim 1, that the wall of the mold 1 is provided with the water-cooling jacket 4 incorporating the vertical partition wall 7 for regulating the vertical water passage 5. In a mold for continuous casting, a water diversion channel 10 of a short path 9 is provided in a vertical partition wall 7 of a water cooling jacket 4 at a position 8 corresponding to a meniscus portion of molten steel in a mold 1, and a position 8 corresponding to a meniscus portion of all longitudinal water channels 5 is made horizontal. The mold for continuous casting is characterized in that it is made to communicate with each other by a water diversion channel 10 in the direction.

In the invention of claim 2, the water cooling jacket 4 is provided in the wall plate 12 of the mold 1, which is a mold for continuous casting according to the means of claim 1.

In the invention of claim 3, the water cooling jacket 4 is provided in the back plate 13 on the back side of the wall plate 12 of the mold 1, which is the mold for continuous casting according to the means of claim 1. .

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view schematically showing a part of an embodiment of a mold of the present invention by breaking it. 2 is shown in FIG.
It is a figure which shows typically the structure in the water-cooling jacket mainly of the water channel of embodiment of this. FIG. 3 is a perspective view schematically showing a part of another embodiment of the mold of the present invention by breaking it.

An embodiment of the present invention will be described with reference to FIGS. 1 and 2. The mold 1 is made of copper and has a straight wall portion 2 and a corner portion 3. In this embodiment, the water cooling jacket 4 is formed inside the wall plate 12 itself of the mold wall portion. The water cooling jacket 4 is partitioned by a large number of vertical partition walls 7 provided integrally with the wall plate 12 to form a vertical water channel 5 therein. By the way, this vertical channel 5 is a portion corresponding to the meniscus portion 8 of the molten steel poured into the mold 1, and as shown in FIG. A water channel 10 is formed so that all the vertical water channels 5 communicate with each other at the position 8 corresponding to the meniscus portion. Therefore, by forming the vertical water channel 5 at the position 8 corresponding to the meniscus portion as the water diversion channel 10 communicating with the short path 9 in the horizontal direction, the temperature inside the water cooling jacket 4 is made uniform and the mold wall is cooled, whereby the mold 1
It is possible to prevent local heating of the mold wall at the position 8 corresponding to the meniscus portion due to overheating of the molten steel inside, and to eliminate local wear and eliminate the origin of non-uniform solidification affecting the initial solidification of molten steel inside the mold 1, The breakout and flaws of the obtained slab will be reduced. A drain port 6 is formed on the upper wall of the mold 1 above each vertical water channel 5 to allow cooling water to drain. A mechanism for handling the cooling water from the drain port 6 may be any mechanism as appropriate, and the description thereof is omitted.

FIG. 3 shows another embodiment of the present invention. In this embodiment, the copper mold wall plate 1 of the mold wall portion 1
The water cooling jacket 4 is not built in itself, and the wall plate 12
The water cooling jacket 4 has a cooling water passage arranged inside the back plate 13 itself made of, for example, stainless steel.
The structure inside the water cooling jacket 4 is the same as the structure having the water cooling jacket 4 on the wall plate 12 itself of the mold wall portion, so detailed description will be omitted, but the vertical partition wall 7 that defines the vertical water channel 5 is omitted. It is provided integrally with the back plate 13.

[0013]

As described above, according to the present invention, in the mold of the continuous casting machine, the diversion channel is provided at the position corresponding to the meniscus portion of the molten steel in the mold of the vertical channel of the water cooling jacket, and the meniscus portion of all the vertical channels is provided. Since the corresponding positions are communicated in the horizontal direction, the mold wall portion at the corresponding meniscus portion is uniformly cooled and local heating is eliminated, and as a result,
The induction of local damage due to local heating of the mold is eliminated,
Furthermore, by eliminating the overheating of the meniscus portion in the mold, the starting point of non-uniform solidification affecting the initial solidification of molten steel is not generated, so breakout and flaws of the cast piece withdrawn from the mold are reduced, and the present invention Has an unprecedented excellent effect.

[Brief description of drawings]

FIG. 1 is a perspective view schematically showing a part of an embodiment of a mold of the present invention by breaking it.

FIG. 2 is a diagram schematically showing a structure inside a water cooling jacket mainly of a water channel of the embodiment of FIG.

FIG. 3 is a perspective view schematically showing a part of another embodiment of the mold of the present invention by breaking it.

FIG. 4 is a perspective view schematically showing a conventional mold with a part thereof cut away.

5 is a diagram schematically showing a structure inside a water cooling jacket mainly including a water channel of the mold of FIG.

[Explanation of symbols]

1 mold 2 straight wall 3 corners 4 water cooling jacket 5 vertical waterways 6 drainage outlet 7 vertical partition 8 Meniscus corresponding position 9 short pass 10 minute water reactor 11 Upper wall 12 wall boards 13 Back plate

Claims (3)

[Claims] 1. A mold for continuous casting in which a water cooling jacket having a vertical partition for regulating a vertical water channel is provided in a mold wall portion, wherein a short path is formed in the vertical partition of the water cooling jacket at a position corresponding to the meniscus portion of molten steel in the mold. A rectangular mold for continuous casting, which is provided with a diversion channel, and the positions corresponding to the meniscus portion of all the vertical diversion channels are connected in the horizontal diversion channel. 2. The mold for continuous casting according to claim 1, wherein the water cooling jacket is provided in the wall plate of the mold. 3. The water cooling jacket is provided in the back plate on the back of the wall plate of the mold.
A mold for continuous casting as described above.