JPH05318054A - Hot reusing equipment for tundish in continuous caster - Google Patents

Abstract

PURPOSE:To improve the operating ratio and the productivity by alternately using two sets of tundishes matching to casting. CONSTITUTION:Just before completing the casting through the tundish 4a loaded on a tundish travelling carriage 5a, heating of the tundish 4b is stopped and also, by working a tilting device 7, the tundish 4b is stood up and a travelling carriage 5b is self-travelled and shifted along a round rail. At the time of completing the casting through the tundish 4a, the travelling carriage 5a is self- travelled and the tundish 4a is shifted to a slag-removal position 2 and on the other hand, the tundish 4b is successively shifted to the casting position 1. The tundish 4a and the tundish 4b are mutually changed to the slag-removal position 2 and the casting position 1, and the tundish 4b is used to the casting and the tundish 4a is tilted sideward by engaging the driven shaft of a tilting frame 6 in the travelling carriage 5a with an output shaft of the tilting device 7. After removing the steel slag in the tundish 4a, the maintenance is executed, and after maintenance, the tundish 4a is heated and prepared to the following casting.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, a tundish used for continuous casting is cooled to near room temperature each time it is used, and then repaired and repaired damaged parts such as a tundish nozzle and lining brick, and then prepared for the next casting. Be reheated. In such cold maintenance of tundish, many tundish must be prepared so as not to hinder casting, and in addition, it takes time to reheat and the tundish does not work even if reheated. The whole dish cannot be heated to a high enough temperature,
At the start of casting, heat absorption by the refractory against the molten steel in the tundish is large, and therefore the molten steel temperature drops, so it is necessary to take care of nozzle clogging and slab quality.

On the other hand, in recent years, in continuous casting, the above problems are solved, the productivity of the continuous casting machine is improved, and the tundish can be effectively used. I am being crushed.

The hot reusing method of this tundish is as follows:
As shown in Fig. 10, in order to discharge the slag that remains in the tundish after casting in the molten state without cooling the tundish, place the slag position 2 near the casting position 1 where the mold is installed. The tundish traveling carriage 12 is mounted on the rail while the traveling rail 18 is laid between the slag position 2 and the casting position 1, and the tundish 4 after casting is cast. The tundish 4 is tilted by moving it from the position 1 to the slag position 2 and using a tilting mechanism provided in the tundish traveling carriage 12 or a tilting device 19 capable of tilting each carriage provided in the slag position 2. While discharging the molten slag in the dish 4, repair the damaged parts such as the tundish nozzle and the lining bricks in a hot state, reheat the inner surface of the tundish if necessary, and then return to the casting position 1. It is intended to be reused. In the figure, T indicates a device for replacing the ladle L for pouring molten steel into the tundish 4 at the casting position 1 during casting.

[0005]

By the way, in the hot reuse of the tundish, one tundish 4 (tundish traveling carriage 12) is moved from the casting position 1 to the slag position 2. Since it is hot-reused, the continuous casting machine cannot perform casting while it is in the slag position 2 and performing operations such as slag, maintenance, and heating. For this reason, the operating rate of the continuous casting machine is reduced, and at the same time, the production amount is reduced. In particular, in recent years, since many types of steel suitable for the purpose have been developed, the slabs produced tend to be of a large variety and small lots, and the frequency of tundish waste and maintenance increases. At the same time as the operating rate of the machine decreases, the production amount will decrease accordingly.

Further, although the replacement frequency is low, when a new tundish is replaced, the operating rate of the continuous casting machine is lowered during the replacement of the new and old tundish. Moreover,
If the replacement takes a long time, the temperature of the preheated tundish decreases, and the preheating efficiency also decreases.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to improve the operating rate of a continuous casting machine even if the cast pieces produced are of a large variety and small lot. It is an object of the present invention to provide a tundish hot reuse facility for a continuous casting machine, which can improve productivity of the continuous casting machine and can be compactly installed in a narrow work space around the continuous casting machine.

[0008]

In order to achieve the above object, one of the tundish hot reuse equipment in the continuous casting machine according to the present invention is to enclose the lower part of the standing ladle changing device. A circular orbit is laid so that the casting position and the slag position are placed in this orbit, and on this orbit,
Two tundish traveling carriages equipped with a tundish and equipped with a mechanism for rolling the tundish are arranged, while a rollover drive device that can be attached to and detached from the rollover mechanism is arranged outside the circular track at the slag position. It will be.

Further, another one of the tundish hot reuse equipment in the continuous casting machine according to the present invention is to install a circular orbit so as to surround the lower portion of the standing ladle changing device,
A casting position is placed in this track, and a slag position is placed outside the track, while a tundish is mounted on a tundish carriage, and a tundish traveling carriage that can mount this tundish carriage is mounted on the circular track. Two tundish are installed in the tundish, and a rollover device that rolls the tundish together with the tundish carriage is disposed at the slag position, and the tundish traveling carriage is equipped with a tundish in a direction intersecting the tundish traveling direction. A rail for mounting a cart for a dish is provided, and further, a rail that is connected to a rail on the tundish traveling cart is laid on the rollover device.

[0010]

In the present invention, two tundishes can be provided between the casting position and the slag position, and the two tundishes can be alternately used for casting. In other words, if one is casting, the other one can be slagged and serviced during that time. After the maintenance, the tundish is heated to the extent that the temperature does not drop significantly in preparation for the next casting. Can be done.
In this way, since two tundish can be used alternately and with good timing in accordance with casting, it is possible to improve the operation rate of the continuous casting machine even if the produced slab is a large variety of small lots. The productivity of the continuous casting machine is increased.

Further, the equipment is such that a circular track is laid so as to surround the standing ladle changing device, and the casting position is arranged in this track, while the slag position is arranged in the track or near the outside of the track. This is a possible structure, and the distance between the casting position and the slag position can be narrowed, and the installation area can be set in a relatively small work area around the continuous casting machine without taking up a large installation area.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

Example 1 FIG. 1 is a plan view of a tundish hot reuse facility according to the present invention. In the figure, 1 is a casting position, 2 is a slag position, and 3 is a circular orbit. In addition, T shows the exchange device of the ladle L standing inside the circular orbit 3.

The casting position 1 and the slag position 2 are arranged in a circular orbit 3, and a mold (not shown) is installed in the casting floor of the casting position 1. Further, a pit (not shown) for accommodating a waste pot for receiving the waste is provided on the floor at the waste position 2.

The circular track 3 includes two circular rails 3a inside and outside,
Tundish traveling trolley which is composed of 3b and has two tundish 4a, 4b on its rails 3a, 3b.
5a and 5b are movably arranged, and at the casting position 1, the tundish traveling carriage 5 stops at a predetermined position so that the tundish 4 can receive the hot water from the ladle L and simultaneously pour it into the mold. It has become.

The tundish traveling carriage 5 mounts the tundish 4 in a detachable manner, and is equipped with a frame 6 which laterally rolls over the tundish 4 with the longitudinal direction of the tundish 4 as a support shaft. Self-propelled by a motor.

A tundish rollover device 7 is arranged outside the circular orbit 3 at the slag position 2, and the tundish rollover device 7 is composed of a drive motor 8 and a speed reducer 9 provided on the machine base. In addition, the output shaft of the speed reducer 9 can be disengaged from the driven shaft of the tundish rollover frame 6 of the traveling carriage 5. In the figure, 10 is a trolley equipped with an exchanging device for advancing to the outer bottom side of the tundish 4 in the overturned state to replace a damaged sliding valve, and 11 is a tumbler which has been discharged and has completed maintenance. The trolley | bogie equipped with the heating apparatus which advances to the outer side of the tundish lid of the tundish 4 of a state, and heats the inside of the tundish 4 is shown.

2 to 4 showing the procedure of using the tundish hot reuse equipment having the above-described structure.
Will be described.

In FIG. 2, one of the tundish 4a and the tundish traveling carriage 5a is in a casting position 1 and is in a casting state, and the other tundish 4b and a tundish traveling carriage 5b are in a waste position 2 and rolls over. The device 7 is in the state of being heated after the maintenance in the overturned state.

Immediately before the completion of casting by the tundish 4a mounted on the tundish traveling carriage 5a, the heating of the tundish 4b is stopped and the overturning device 7 is activated to wake it up, and the tundish traveling carriage 5b is self-propelled into a circular shape. Move in the direction of arrow X along the orbit. Next, when casting by the tundish 4a is completed, the tundish traveling carriage 5a is self-propelled to move the tundish 4a to the slag position 2, while the tundish 4b continues to move to the casting position 1 (Fig. 3).

By the above movement, the tundish 4a and the tundish 4b are exchanged between the casting position 1 and the slag position 2, after which the tundish 4b is used for casting, while the tundish 4a is running in the tundish. The driven shaft of the tundish rollover frame 6 of the trolley 5a is engaged with the output shaft of the tundish rollover device 7 so that it can be rolled over by the rollover drive, and the steel slag and the like in the tundish 4a are discharged, and then maintained in the rollover state. Is performed, and after maintenance, it is heated to prepare for the next casting (see FIG. 4).

Since the two tundishes 4a and 4b are alternately used by repeating the above-mentioned use procedure, the tundish 4 after casting can be used for the next casting without significantly lowering the temperature, and The tundish 4 can be quickly replaced with the casting position 1 and the operating rate of the continuous casting machine can be improved.

[Embodiment 2] FIG. 5 is a plan view of a tundish hot reuse facility according to another embodiment of the present invention. The same parts as those in the first embodiment are designated by the same reference numerals.

In the tundish hot reuse facility shown in this figure, the casting position 1 is located inside the circular track 3 and the slag position 2 is located outside the circular track 3. In addition, two tundish traveling carriages 12a and 12b are mounted on the circular track 3.
The tundish traveling carriage 12 is provided with rails 13 in a direction intersecting the traveling direction. Further, at the slag position 2, a tundish 4 in which a rail 15 that can be connected to the rail 13 via a fixed rail 14 is laid.
A rollover device 16 for rolling over is provided.

On the other hand, the tundish 4 is mounted on a tundish truck 17 and the tundish truck 17 is used.
Is mounted on the rail 13 of the tundish traveling carriage 12 so that the tundish 4 can travel and the long axis direction of the tundish 4 is parallel to the rail 13. In this embodiment, the equipment other than the above is the same as the equipment having the configuration shown in the first embodiment.

The procedure for using the tundish hot reuse equipment having the above-mentioned structure will be described with reference to FIGS. 6 to 9.

In FIG. 6, one tundish 4a is integrally provided on the tundish carriage 17a, is mounted on the tundish traveling carriage 12a, is in the casting position 1 and is in a casting state. The other tundish 4b is provided integrally with the tundish carriage 17b, is in the slag position 2, and is in the state of being overturned by the overturning device 16 while being heated after maintenance. Also, tundish trolley 12b
Is stopped and is in a standby state with the rail 13 connected to the fixed rail 14.

Immediately before the completion of casting by the tundish 4a mounted on the tundish traveling carriage 12a, the heating of the tundish 4b is stopped and the overturning device 16 is activated to raise the rail 15 of the overturning device 16 to the fixed rail 14. Once connected, the tundish carriage 17b is allowed to self-propel and move onto the tundish carriage 12b (see FIG. 7).

Next, when the casting by the tundish 4a is completed, the tundish traveling carriage 12a and the tundish traveling carriage 12b are self-propelled in the direction of the arrow X, and the rail 13 connects the tundish traveling carriage 12a to the fixed rail 14. While moving to the place, Tundish traveling carriage 12b
Is moved to the casting position 1 (see FIG. 8).

After this, the tundish 4b is used for casting, while the tundish 4a is a tundish carriage 17
By self-propelled a, the tundish carriage 17a moves together on the overturning device 16 and is overturned by the overturning drive.After the steel slag and the like in the tundish 4a are discharged, maintenance is performed in the overturned state, and after maintenance. It is heated and ready for the next casting (see FIG. 9).

In this embodiment, like the first embodiment, two tundish 4 are prepared by repeating the use procedure as described above.
Since a and 4b can be used alternately, it can be used for the next casting without significantly lowering the temperature of the tundish 4 after casting, and the tundish 4 can be quickly replaced with the casting position 1 and the continuous casting machine can be used. The operating rate of can be improved.

The above-described first and second embodiments are described by showing typical examples, and the present invention is not limited to these examples. For example, in the first embodiment, the fixed rail 14 is used. However, the rails 13 of the tundish traveling carriage 12 and the rails 15 of the overturning device 16 may be directly connected to each other.

[0033]

As described above, according to the hot reuse equipment for tundish in the continuous casting machine according to the present invention, two tundish can be alternately used for casting. After casting one tundish as described above, the operating rate of the continuous casting machine is greatly improved and the productivity of the continuous casting machine is increased, rather than immediately slagging, servicing and hot reuse. Further, in the case where a trouble occurs due to maintenance or the like with one tundish, the time loss during the replacement with the preheated tundish becomes large, but in the present invention, while one is used for casting, In addition, since it is possible to perform work such as slag and maintenance on the other one, even if there is a problem, the influence on the operation of the continuous casting machine can be minimized.

[Brief description of drawings]

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

FIG. 2 is an explanatory diagram of a procedure for using a tundish hot reuse facility.

FIG. 3 is an explanatory diagram of a procedure for using the hot reuse facility of the tundish.

FIG. 4 is an explanatory diagram of a procedure of using the hot reuse facility of the tundish.

FIG. 5 is a plan view of a tundish hot reuse facility according to another embodiment of the present invention.

FIG. 6 is an explanatory diagram of a procedure for using the hot reuse facility of the tundish.

FIG. 7 is an explanatory diagram of a procedure of using the hot reuse facility of the tundish.

FIG. 8 is an explanatory diagram of a procedure for using the tundish hot reuse facility.

FIG. 9 is an explanatory diagram of a procedure for using the tundish hot reuse facility.

FIG. 10 is a plan view of a conventional tundish hot reuse facility.

[Explanation of symbols]

1: Casting position 2: Slag position 3: Circular track 3a, 3b: Circular rail 4, 4a, 4b: Tundish 5,5a, 5b: Tundish traveling carriage 6: Rolling frame 7: Rolling device 8: Drive motor 9 : Reducer 10: Sliding valve exchange device 11: Tundish heating device 12, 12a, 12b: Tundish traveling carriage 13, 14, 15: Rail 16: Rolling device 17, 17a, 17b: Tundish carriage

Claims (2)

[Claims] 1. A circular orbit is laid so as to surround the lower part of the standing ladle changing device, and a casting position and a slag position are arranged in this orbit, and a tundish is mounted on this orbit. And a tundish traveling trolley provided with a mechanism for overturning the tundish, while a rollover drive device that can be attached to and detached from the rollover mechanism is arranged outside the circular orbit at the slag position. Tundish hot reuse facility in. 2. A circular orbit is laid so as to surround the lower part of the standing ladle changing device, and a casting position is arranged in this orbit and a slag position is arranged outside the orbit, while a tundish is tundish. Two tundish traveling trolleys, which are mounted on the trolley for the tundish, can be mounted on the circular track, and at the slag position, roll over the tundish with the trolley for the tundish. The tundish traveling carriage is provided with a rail for mounting a tundish carriage in a direction intersecting the tundish traveling direction, and further, the rolling device is mounted on the tundish traveling carriage. A tundish hot reuse facility in a continuous casting machine, characterized in that a rail connected to the rail is laid.