JP2005224808A - Apparatus for cooling continuous casting mold having molten metal level indicator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for cooling a continuous casting mold having a molten metal level indicator, which apparatus can detect a molten metal level without vertically moving the molten metal level indicator in the mold, and does not immerse the molten metal level indicator into the molten metal even when the molten metal level has risen. <P>SOLUTION: The apparatus for cooling the continuous casting mold having the molten metal level indicator comprises a casting mold cooling apparatus 4 for cooling the continuous casting mold 1 into which molten steel 2 is poured, an electromagnetic agitator 3 having an electromagnetic coil for carrying out electromagnetic stirring for the molten steel in the continuous casting mold, and the molten metal level indicator 9 for detecting the molten metal level in the casting mold on the upper portion of the continuous casting mold 1. In the casting mold cooling apparatus 4, a water supplying header 11 for supplying cooling water is arranged in the longitudinal direction on one side surface of the electromagnetic agitator 3, and a water discharging header 12 for collectively discharging the cooling water is arranged in the longitudinal direction on the other side surface of the electromagnetic agitator 3, and the water supplying header 11 and the water discharging header 12 are connected by means of a plurality of cooling water passages 13 arranged in the lateral direction along the continuous casting mold 1, and the cooling water passages 13 are arranged between the electromagnetic agitator 3 and the continuous casting mold 1 so as to abut on the continuous casting mold 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a continuous casting mold cooling apparatus provided with a molten metal level meter for detecting the molten metal level of molten steel in a continuous casting mold.

  In a continuous casting method for steel slabs and billets, non-metallic inclusions and gas contained in the molten steel injected into the mold from the ladle through the tundish are actively levitated to produce a high quality slab. In order to obtain, the technique which carries out electromagnetic stirring of the molten steel in a casting mold with an electromagnetic coil is disclosed by patent document 1 or patent document 2, for example.

  2A and 2B show a conventional continuous casting mold cooling apparatus, wherein FIG. 2A is a schematic front sectional view, and FIG. 2B is a schematic plan sectional view.

  As shown in FIG. 2, the electromagnetic stirring device 3 having an electromagnetic coil for stirring the molten steel 2 injected into the mold 1 is surrounded by the upper and lower sides, and the mold cooling device 4 is in contact with both side surfaces of the mold 1. is set up.

  The mold cooling device 4 allows cooling water to flow through the plurality of cooling water passages 6 provided vertically in the mold from the lower side to the upper side, and collects the cooling water from the lower water supply header 7 to the upper drain header 8. It has a structure to do.

Moreover, in order to perform continuous casting stably, as described in patent document 2, in order to perform the hot_water | molten_metal surface level control which maintains the hot_water | molten_metal surface level of the molten steel inside a casting_mold | template in an appropriate level, A hot water level meter 9 is attached to the support bar 10, and is configured to enter or retreat from the mold 1 by moving the support bar 10 forward, backward, and up and down.
JP-A-54-4241 JP 2000-107847 A

  In the mold 1 provided with the conventional electromagnetic stirring device 3, the cooling water is supplied from the lower water supply header 7, passed through the cooling water flow path 6 in the mold, and the drainage is gathered by the upper drainage header 8. Therefore, since a certain space for disposing the drainage header 8 is necessary on the upper part of the mold 1, a system is adopted in which the hot water level meter 9 enters the mold from the upper part of the mold 1. For this reason, not only a device for moving the molten metal level meter 9 up and down in the mold is required, but the molten metal level in the mold rises for some reason and the molten metal level meter is immersed in the molten steel and is damaged. was there.

  In addition, if a water level meter is installed on the upper part of the mold with a conventional cooling device, not only does the detection accuracy decrease because the water level meter is far from the hot water level, but also the cooling device overhangs the upper part of the mold. This will also narrow the operator's field of view.

  Therefore, the present invention is capable of detecting the oil level without moving the hot water level meter up and down in the mold, and the hot water level meter does not immerse in the molten steel even if the oil level rises. A continuous casting mold cooling apparatus provided with the above is provided.

    The continuous casting mold cooling apparatus of the present invention is a mold cooling apparatus that cools a continuous casting mold into which molten steel is injected and an electromagnetic stirring apparatus that electromagnetically stirs the molten steel in the mold. A water supply header for supplying cooling water to one side of the electromagnetic stirrer is arranged in the casting direction, and a drainage header for collecting and discharging cooling water is arranged in the casting direction on the other side, and the water supply header and the drainage header are A molten metal level meter that detects the molten metal level of the molten steel in the mold is connected to the upper surface of the cooling device and the upper surface of the mold, which are connected by a cooling water channel of the double water provided along the mold in the lateral direction. It is characterized by being arranged.

  The continuous casting mold cooling apparatus of the present invention supplies water from a vertical water supply header disposed on one side surface of an electromagnetic stirrer, and passes the cooling water through a cooling water passage provided in a horizontal direction. Since the drainage header is assembled to the drainage header arranged on the other side, the drainage header space required in the upper part of the conventional mold is unnecessary, and as a result, the installation surface is lowered on the upper part of the mold. The distance between the surface level meter and the molten steel surface level is reduced, and it is possible to improve the surface level control accuracy. At the same time, the distance between the upper surface of the mold and the tundish can be reduced, and stable casting can be performed which is good for expanding the working space of the casting worker and the monitoring field of view of the molten steel surface.

  The electromagnetic stirrer of the present invention will be described with reference to the example shown in the figure.

  FIG. 1A is a schematic side sectional view of an electromagnetic stirrer, FIG. 1B is a schematic plan sectional view, and FIG. 1C is a schematic front sectional view.

  An electromagnetic stirring device 3 having an electromagnetic coil for electromagnetically stirring the molten steel 2 in the continuous casting mold 1 is installed on a surface facing the mold cooling device 4.

  In the mold cooling device 4, a vertical water supply header 11 and a drainage header 12 for supplying cooling water to both sides of the electromagnetic stirring device 3 are installed in the vertical direction, and the water supply header 11 and the drainage header 12 are lateral to the continuous casting mold 1. They are connected by a plurality of cooling water flow paths 13 provided in the direction. The cooling water flow path 13 is disposed between the electromagnetic stirring device 3 and the continuous casting mold 1 and is disposed in contact with the continuous casting mold 1. The cooling water supplied to the water supply header 11 flows through the cooling water flow path 13 and is collected and discharged by the drainage header 12.

  A hot water level meter for detecting the hot water level in the mold is installed on the upper part of the mold that has become an empty space by installing the water supply header 11 and the drainage header 12 on both sides of the electromagnetic stirring device 3.

  Since the water supply header 11 and the drainage header 12 are installed on both sides of the mold, the upper part of the mold has a small amount of overhang, and the distance between the surface of the hot water level meter installed on the upper surface of the mold and the molten steel level is reduced. It becomes possible to improve the accuracy of the level meter.

The continuous casting mold cooling device of this invention is shown, (a) is a side schematic sectional drawing of an electromagnetic stirrer, (b) is a plane schematic sectional drawing, (c) is a front schematic sectional drawing. The conventional continuous casting mold cooling device is shown, (a) is a schematic front sectional view, (b) is a plane schematic plan sectional view.

Explanation of symbols

1: Mold 2: Molten steel 3: Electromagnetic stirring device 4: Mold cooling device 5: Cooling copper plate 6: Cooling water flow path 7: Water supply header 8: Drainage header 9: Hot water level meter 10: Support bar 11: Water supply header 12: Drainage header 13: Cooling water flow path

Claims (1)

In an electromagnetic stirring device equipped with a mold cooling device for cooling a continuous casting mold into which molten steel is injected and an electromagnetic coil for electromagnetically stirring the molten steel in the mold,
The mold cooling device has a water supply header for supplying cooling water on one side of the electromagnetic stirrer in the casting direction, and a drain header to collect and discharge the cooling water on the other side in the casting direction. The header and the drainage header are connected to each other by a double water cooling channel provided along the mold to detect the level of the molten steel in the mold on the upper surface of the cooling device and the upper surface of the mold forming the cooling channel. A continuous casting mold cooling apparatus having a molten metal level meter.

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