JPS58100954A - Electromagnetic stirrer for mold inside - Google Patents

Abstract

PURPOSE:To make the selection of stirring in horizontal and vertical directions easy and to permit optimum stirring that meets steel kinds by mounting electromagnetic coils having mounting surfaces of an approximately square shape to the side parts of a mold in such a way that the coil directions can be changed to 90 deg. directions at the mounting position. CONSTITUTION:When electromagnetic coils 4' are arrayed in the side parts of a mold for continuous casting by unifying the directions of the coils 4 horizontally, the molten steel in the mold is stired in a vertical direction. When the coils 4' are changed 90 deg. in such a way as to position the coils 4 vertically, the molten steel in the mold is stirred in a horizontal direction. In this case, cooling systems are constituted in the respective coils 4' separately from the mold and since screw holes for mounting and other piping systems are provided in point symmetry, the selecting operation is carried out relatively easily.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an in-mold electromagnetic stirring device for continuous casting.

In the mold part for continuous casting, horizontal stirring is required to prevent the generation of 00 bubbles in the molten steel, or vertical stirring is required to prevent the generation of inclusions such as Al2O.

In order to perform such stirring, a method has been adopted in which an electromagnetic field is generated within the mold to cause convection and stirring of the molten steel within the mold.

Conventionally used stirring devices are molds with built-in coils that share the cooling water inside the mold and the cooling water for the electromagnetic stirring coil.In both cases, the coils are installed only in a certain direction from the viewpoint of efficiency, etc. It had become a thing.

For this reason, if the stirring direction changes depending on the type of steel to be cast, it is necessary to replace all the molds containing the coils, and it is necessary to prepare as many molds as the total number of coil molds on the surface side. Also,
As shown in Figures 1 and 2, there are many cases in which the coil and mold are integrated in structure, and when the copper plate of the mold is removed, the electromagnetic coil may fall apart, or when the electromagnetic coil is removed and replaced with another mold. Each part had to be removed and installed. As a result, there were problems such as laborious work and long equipment downtime.

Therefore, the purpose of this invention is to solve the above problems and horizontally
In the mold, it is relatively easy to switch between agitation and vertical agitation, allowing for optimal agitation depending on the type of steel! A magnetic stirring device is provided.

According to the present invention, a plurality of square electromagnetic coils are attached to the mold in a structure that is easy to remove, and the direction can be changed by 90 degrees as necessary, so that the coil can be stirred in both vertical and horizontal directions.

The following description will be made based on the illustrated embodiments.

As shown in FIG. 6, electromagnetic coils 41 are attached to the side of the continuous casting mold 1 shown in FIG. 1, with the coil directions aligned.

The structure of the electromagnetic coil 4' is shown in Fig. 5.6.7, and the electromagnetic coil 41 is made of non-magnetic metal such that the coil 4 is wound around an iron core 3 having a core layer of silica steel plate, and the entire path is square. It is covered with an outer cover 5 made of The iron core 3 is supported by a strong yoke, and the power source is supplied from the outside by passing the entire power cable through the storage tube 7 to the yoke 6'! is supplied to the coil 4.

The electromagnetic coil 41 generates heat because the large 111 current flows continuously, and in order to cool this, cooling water is supplied through the cooling water pipe 8f. The cooling water passes through six yokes and is led to the electromagnetic coil terminal processing section and water supply jacket, and from the water supply jacket to the cooling channels 9, 9'? The water flows through the drain jacket 12 and is discharged from the drain pipe 10. Here, the cooling water channel 9 is formed by the iron core 3 and the coil 4, and the cooling water channel 9'' is a gap formed by the electromagnetic coil 41 and the outer cover 5.

On the back side of the electromagnetic coil, bolt holes 12 are formed so as to be symmetrical about the center position 0, as shown in FIG.
The electromagnetic coil is configured so that it can be installed by rotating it by 90 degrees.In addition, there are a power cable protection pipe 7, a water supply pipe 8, a drain pipe 10, and a measurement cable protection pipe 11 in the surrounding area.
Similarly, they are arranged symmetrically with respect to the center 0 and have the same diameter.

FIG. 8 shows the state in which the electromagnetic coil 4' is attached to the mold 1. Mold 1 includes a copper plate 13, a front partition plate 14, and an upper frame 1.
5, a lower frame 16, and a back frame 17. The electromagnetic coil 4' is bolted to the back frame 17. The wiring protection pipe 7 and the water supply pipe 8 pass through the back frame 17 and exit to the outside, and are supplied with power and water via a readable cable 18 and a flexible hose 19, and the electromagnetic coil is rotated 90 degrees from its current direction. Even after installation, connections can be easily changed. Here, the front partition plate 14 is made of non-magnetic metal. In addition, the copper plate 1S and the front partition plate 1
4 is a mold cooling water channel 20, and cooling water different from the electromagnetic coil 41 cooling water is supplied from outside the mold.

In the example shown in FIG. 3, the tWi coil 41 having such a configuration cools the heat flowing from the molten steel 21 through the copper plate 13t. Stir vertically. Further, if the electromagnetic coil 4'i is turned 90 degrees so that the coil 4 becomes vertical as shown in FIG. 4, stirring in the horizontal direction can be performed completely. These,'
As already described when converting the alli coil 4', each electromagnetic coil 4' has a cooling system separate from the mold 1.
The mold-type electromagnetic stirring device according to the present invention is as described above, and has the following effects. The electromagnetic coil is designed to be easily attached and detached, and stirring can be performed in any vertical or horizontal direction, making it possible to perform optimal stirring according to the type of steel using a minimum number of expensive electromagnetic coils.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional example in which an electromagnetic coil is incorporated into a mold, Fig. 2 is a front view of a conventional electromagnetic coil, and Figs. 3 and 4 are an in-mold electromagnetic stirring device according to the present invention. A front view showing an example of installing the electromagnetic coil, Fig. 5 is a view showing the front side of the electromagnetic coil, Fig. 6 is a cross-sectional view of the electromagnetic coil, Fig. 7 is a view showing the back side, and Fig. 8 is a view showing the electromagnetic coil in the mold. It is an attachment sectional view. 1. Mold, 2. Electromagnetic coil, 6. Iron core, 4. Coil, 4°. Electromagnetic coil, 5. Outer cover, 6. Yoke, 7. Power cable protection tube, 8.・Cooling water pipe, 9,
91... Cooling water channel, 10... Drain pipe, 11... Measurement cable protection tube, 12... Bolt hole, 16... Copper plate, 14...
・Front partition plate, 15.. Upper frame, 16.. Lower frame, 17.. Back frame, 18.. Flexible cable, 19.. Flexible hose, 20.. Mold cooling channel, 21.
... Popular, 0... Center. % Applicant Sumitomo Metal Industries Co., Ltd. Agent Satoshi Hisakado (7) -255=

Claims (1)

[Claims] 1 with almost square mounting surface! An in-mold electromagnetic stirring device characterized in that a magnetic coil is attached to the side of the mold so that the coil direction can be changed by 90 degrees depending on the mounting position.