JPH08294756A - Hot tundish reuse equipment in continuous casting machine - Google Patents

Abstract

PURPOSE: To shorten the period of time from the removal of slag after casting to the change of a nozzle and to enable the omission of reheating of a tundish by providing a slag removal pot for the slag in a tundish and a refractory maintenance device between a casting position and a preheating position. CONSTITUTION: After completing the casting, a tundish car 16 is shifted from the casting position 1 to a slag discharge position 2, and remaining molten steel and slag in the tundish 8 are discharged into the slag discharge pot with a tilting device. After discharge, the tundish car is shifted to the refractory maintenance device 3 and a tundish refractory maintenance truck 20 shiftable on traveling rails 18 crossed with tundish car traveling rail 5 is sent under the tundish 8 to execute the change and the maintenance of the refractory. The tundish car 16 is returned back tot the casting position 1 and the casting is started, but in the case of executing no continuous casting, the tundish car is shifted to the preheating position 21 and the tundish 8 is heated to prevent the lowering of the temp. In such a way, the time required for changing the nozzle after casting can be shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous casting facility, in particular, a tundish hot reuse facility. More specifically, the tundish is mounted on a tundish car and run between a casting position and a slag position. It relates to equipment for hot reuse.

[0002]

2. Description of the Related Art In continuous casting, in recent years, in order to reduce the cost of the tundish refractory, hot rotary equipment for continuously using the tundish for a plurality of times is introduced. As an example thereof, Japanese Patent Laid-Open No. 5-318052 discloses that
Japanese Patent Laid-Open No. 5-318053 discloses a method of combining a tundish car and a mobile trolley for a tundish car by combining two tundish cars by combining a tundish car and a turntable for a tundish car. The method of alternating use of the tundish of US Pat.

Further, Japanese Patent Application Laid-Open No. 4-332150 discloses a method for removing residual molten steel in a tundish and slag. Further, as an example of a tundish refractory maintenance device, Japanese Patent Laid-Open No. 4-332157 discloses a dipping nozzle and a sealing mortar transfer device.
Japanese Patent No. 2156 discloses a tuyere metal pushing up device.

[0004]

However, the method of the above construction requires two types of devices, a tundish car and a moving device of the tundish car itself, as the tundish moving device. There is a problem that two tundish cars are required to use the same, and the equipment cost is very high.

Further, since the tundish maintenance is carried out at a position outside the tundish car traveling rail connecting the casting position and the slag position with the moving car of the tundish car, it takes time to move the tundish. There was a problem that the temperature of the dish refractory decreased.

An object of the present invention is to solve the above-mentioned problems and to provide a hot reuse facility capable of efficiently maintaining a tundish without lowering the temperature of the tundish refractory. To do.

[0007]

One of the tundish hot reuse equipments in a continuous casting machine according to the present invention is one in which a tundish is mounted on a tundish car and run between a casting position and a preheating position. In the continuous casting equipment, the running rail of the tundish car is laid in the same direction as the casting direction of the equipment, and the preheating device is installed at the end of the running opposite to the casting position.The tundish is placed between the casting position and the preheating device. It is provided with a slag pot for the inner residual molten steel and slag and a tundish refractory maintenance device.

In the above equipment, a device for tilting the tundish to discharge the residual molten steel and slag in the tundish to the slag pot is provided as means for discharging the residual molten steel and slag in the tundish to the slag pot. It may be provided, or a slag device may be installed at the bottom of the tundish.

Further, another one of the tundish hot reuse equipment in the continuous casting machine according to the present invention is a continuous operation in which the tundish is mounted in a tundish car and run between a casting position and a preheating position. In the casting equipment, the running rail of the tundish car is laid in the same direction as the casting direction of the equipment, and the preheating device is arranged at the running end opposite to the casting position.
In the hot reuse facility of the tundish where the residual molten steel in the tundish and the slag slag pot and the tundish refractory maintenance device are installed between the casting position and the preheating device, the direction crossing the running rail of the tundish car. The tundish refractory maintenance truck is laid with running rails.

[0010]

In the present invention, the slag pot and the tundish refractory maintenance device are provided between the casting position and the preheating position, and one tundish car can move the tundish between the devices. That is, one of the most important points in hot reuse of tundish, the time from the end of casting to the end of slag and casting nozzle replacement can be shortened, so continuous use is possible without reheating the tundish. Become.

Further, the movement between the tundish devices is 1
Since it can be done with one tundish car, the equipment cost can be reduced. Furthermore, the casting position, the slag slag position, the tundish refractory maintenance position, and the tundish preheating position are aligned in a straight line, and the running direction of the tundish car is the same as the casting direction of the equipment. Compared with the above, the equipment width can be narrowed, and accordingly, the factory building width can be narrowed, so that the equipment cost of the factory building can be reduced.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a plan view of tundish hot reuse equipment according to the present invention, and FIG. 2 is a sectional view taken along line AA of FIG.
In the figure, 1 is a casting position, 2 is a slag position, 3 is a refractory maintenance and preheating position, 4 is a casting direction, and 5 is a tundish car rail. In addition, 6 is a ladle and 7 is a ladle support stand. A ladle car or a turret may be used instead of the ladle support mount.

The tundish 8 has a nozzle stopper 9
Is installed to control the amount of molten steel supplied to the mold 13. Instead of this stopper, a sliding nozzle device may be installed, or the injection amount may be controlled by a molten steel head in the tundish.

An immersion nozzle 10 is attached to the bottom of the tundish 8 to prevent the molten steel supplied to the mold 13 from being oxidized. This immersion nozzle 10
Open casting may be performed without using.

A long nozzle 12 is mounted on the tundish 8 by a long nozzle supporting device 11 to prevent the molten steel supplied from the ladle 7 to the tundish 8 from being oxidized. This long nozzle 12
Open casting may be performed without using.

An overflow pot 14 for receiving molten steel overflowing from the tundish 8 is arranged behind the mold 13. Further, a rounder 15 used during open casting is installed between the mold 13 and the pot 14.

Immediately after the completion of casting, the tundish car 16 moves from the casting position 1 to the slag position 2 and the tilting device (not shown) provided in the tundish car 16 is used to remove the residual molten steel in the tundish 8. And the slag is discharged to the slag pot 17. This tilting device may be disposed outside the tundish car 16.

The tilting device uses a cylinder, a gear or the like, and the tundish may be rotated in the casting direction or tilted in the direction perpendicular to the casting direction. The residual molten steel and the slag may be discharged by a discharging device installed at the bottom of the tundish 8 without tilting the tundish 8.

After discharging, the tundish car 16 moves to the refractory maintenance position 3 and the tundish refractory maintenance cart 2
Refractory replacement and maintenance will be performed at 0. In this tundish refractory maintenance vehicle 20, a soaking nozzle preheating device, a soaking nozzle replacing device, a nozzle hole cleaning device and the like are incorporated for one strand or a plurality of strands. The traveling rail 18 of the tundish refractory maintenance truck 20 is laid in a direction intersecting with the tundish car traveling rail 5,
After the tundish car 16 arrives at the refractory maintenance position 3, it enters under the tundish 8 to perform refractory maintenance. The tundish refractory maintenance truck 20 is disposed on one side or both sides of the refractory maintenance position 3.

The dipping nozzle 10 is used for open casting.
If the tundish car 16 is not used and the tundish car 16 has sufficient lifting ability and there is no interference between the dipping nozzle 10 and the tundish refractory maintenance trolley 20 during traveling, the tundish refractory will be shortened to shorten the refractory maintenance time. Maintenance truck 2
It is also possible that 0 stands by at a predetermined position before the tundish car 16. After the refractory replacement and maintenance, the tundish car 16 returned to casting position 1 again,
Start casting.

When there is no continuous casting due to the restrictions of the converter or electric furnace in the preceding process of the continuous casting equipment, the tundish car 16 moves to the preheating position 21 and the tundish 8 is heated by the preheating device 19. And prevent the refractory temperature from decreasing.

When it is necessary to replace the whole tundish 8 due to the life of the tundish refractories, the tundish 8 is replaced with a new tundish heated by a tundish preheating device installed at an off-line tundish maintenance facility or the like. This allows continuous casting.

[0023]

As described above, according to the hot reuse facility for tundish in the continuous casting machine according to the present invention,
One tundish casting position, slag slag removal position, tundish refractory equipment position and tundish preheating position can be moved between devices, so it is the most important point for hot reuse of tundish. As one, the time from the end of casting to the end of slag and replacement of the casting nozzle can be shortened, so continuous use is possible without reheating the tundish. Further, since the tundish can be moved between the respective devices by one tundish car, the equipment cost can be reduced.

Further, the casting position, the slag slag position, the tundish refractory maintenance position and the tundish preheating position are arranged in a straight line, and the running direction of the tundish car is the same as the casting direction of the equipment. Compared with a casting machine, the equipment width can be made narrower, and since the factory building width can be made narrower, the equipment cost of the factory building can also be reduced.

[Brief description of drawings]

FIG. 1 is a plan view of a tundish hot reuse facility according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

 1 Casting position 2 Slag position 3 Refractory maintenance 4 Casting direction 5 Tundish car rail 6 Ladle 7 Ladle support stand 8 Tundish 9 Nozzle stopper 10 Immersion nozzle 11 Long nozzle support device 12 Long nozzle 13 Mold 14 Overflow pot 15 Rounder 16 Tundish Car 17 Dust Pot 18 Traveling Rail for Refractory Maintenance Truck 19 Preheating Device 20 Tundish Refractory Maintenance Truck 21 Preheating Position

Claims (3)

[Claims] 1. In a continuous casting facility in which a tundish is mounted on a tundish car and run between a casting position and a preheating position, the traveling rail of the tundish car is laid in the same direction as the casting direction of the facility to perform casting. It is characterized in that a preheating device is arranged at a traveling end opposite to the position, and a slag slag pot for remaining molten steel in the tundish and a tundish refractory maintenance device are arranged between the casting position and the preheating device. Tundish hot reuse facility. 2. The hot reuse facility for a tundish in a continuous casting machine according to claim 1, further comprising a device for discharging the residual molten steel in the tundish and the slag to a slag pot. 3. The tundish refractory maintenance device is mounted on a trolley, and the traveling rail for the tundish refractory maintenance trolley is laid in a direction intersecting with the traveling rail of the tundish car. Item 1. A hot reuse facility for a tundish according to item 1.