JPH0724556A - Continuous casting equipment - Google Patents

Abstract

PURPOSE:To shorten an interrupting time of the casting by quickly changing a tundish and a ladle. CONSTITUTION:A connection shifting means having a connecting plate 11 and a connecting lever 1 is arranged between a ladle truck 3 and a tundish truck 13. The connecting lever 1 is turned with a hydraulic cylinder 4 and can be connected or released to or from the connecting plate 11. When the life of the refractory in the tundish approaches the using permissible limit time, the standby tundish truck loading the new tundish beforehand and the ladle truck loading the ladle 51 fully filled with molten metal are connected and leaving them standing while pouring the molten metal into the new tundish 61. When the molten metal in the present ladle and tundish 61 is used up, the new ladle 51 and tundish 61 are changed over during waiting and the continuous casting is reopened.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to continuous casting equipment,
In particular, the present invention relates to a continuous casting facility equipped with a device for rapidly changing the tundish and the ladle.

[0002]

2. Description of the Related Art It is common knowledge that a recent continuous casting facility makes full use of ladle exchange and tundish exchange to carry out continuous operation for a long time, which is useful for improving productivity and economic efficiency. FIG. 3 is a side view showing the main part of the continuous casting equipment as described above. A plurality of nozzles 62 are mounted on a tundish carriage 63 that is self-propelled on a rail 66 and a plurality of nozzles 62 are arranged on the lower surface in a moving direction at right angles to the paper surface. Lined tundish 61
And a mold 70 arranged in the same interval and direction as the nozzle 62, and a mold 52 mounted on a ladle carriage 53 which is self-propelled on a rail 56 on the frames 54 and 55, and the nozzle 52 is provided on the lower surface.
And the ladle 51 to which is attached is shown.

The tundish 61 is moved by a tundish carriage 63 so that each nozzle 62 is set to match the position of each mold 70. Then, on the ladle truck 53 set above the tundish 61,
A ladle 51 full of molten metal 50 is placed on the nozzle 52.
Is opened and the molten metal 50 is supplied to the tundish 61.
When the molten metal 50 is accumulated in the tundish 61 by a predetermined amount, the nozzles 62 are opened, the molten metal 50 is distributed and supplied to each mold 70, and continuous casting is started.

The life of the refractory material of the tundish 61 is exhausted in about 10 hours, so that the continuous use time is about 10 hours, and the molten metal 5 in the tundish 61 and the ladle 51 is used.
When 0 is lost, continuous casting is temporarily stopped, a new tundish 61 waiting on another tundish carriage 63 is replaced, and the empty ladle 51 is melted by a ladle exchange device such as a turret (not shown). Replace the new ladle 51 with 50, and replace the nozzle 5
2 is opened and the molten metal 50 is supplied to the tundish 61. After a predetermined amount of this molten metal 50 has accumulated in the tundish 61, each nozzle 62 is opened to open each mold 7.
The pouring to 0 is restarted, the slab remaining in the mold 70 is connected, and continuous casting is restarted.

In the above-mentioned conventional equipment, the time until the tundish 61 and the ladle 51 are replaced and the molten metal 50 supplied from the ladle 51 is accumulated in the new tundish 61 in a predetermined amount is the interruption time of the continuous casting. If the interruption time becomes long, the connection between the residual cast piece and the new molten metal 50 in the mold 70 becomes incomplete, and the restart of casting fails. In particular, when the slab is a billet having a small cross section, the solidification time is short, which is a serious problem.

[0006]

DISCLOSURE OF THE INVENTION The present invention rapidly replaces the tundish and the ladle, restarts continuous casting within a short time, shortens the interruption time of continuous casting, and eliminates the residual cast pieces in the mold. An object of the present invention is to provide a continuous casting facility capable of reliably connecting with molten metal.

[0007]

According to the present invention, a tundish for supplying molten metal to a mold, a tundish truck for moving the tundish, a ladle for supplying molten metal to the tundish, and a ladle for moving the ladle. In a continuous casting apparatus equipped with a ladle carriage, in order to solve the above problems, a connecting and moving means for connecting the tundish carriage and the ladle carriage to simultaneously move in the same direction is adopted.

[0008]

Function: The molten metal is supplied from the ladle to the tundish set above the mold, and continuous casting is started. When the allowable use time of the refractory material of the tundish approaches, a tundish trolley equipped with a new tundish waiting in advance and a ladle trolley equipped with a ladle waiting to be loaded with new molten metal are provided by the present invention. The tundish is connected by the connecting and moving means provided, and the supply of the molten metal from the ladle to this tundish is started and the system is on standby.

When the molten metal in the tundish and ladle being poured into the mold is exhausted, continuous casting is interrupted, and the tundish and ladle are removed from the mold by a tundish carriage and a ladle carriage. The ladle on the ladle carriage and the tundish carriage, which are connected to each other by the connecting means, and the new tundish poured from the ladle are moved and set on the mold. A predetermined amount of molten metal is accumulated in this new tundish, and pouring into the mold can be immediately restarted to connect with the residual cast pieces in the mold, and continuous casting can be restarted in a short time.

[0010]

EXAMPLES The continuous casting equipment according to the present invention will be described below in detail with reference to the examples shown in FIGS. 1 and 2, the same parts as those of the conventional equipment shown in FIG. 3 are designated by the same reference numerals, and a duplicate description will be omitted. In FIG. 1 and FIG. 2, reference numeral 1 denotes a connecting lever, which is rotated by a hydraulic cylinder 4 so that the frame 5
It is pivotally mounted 1'on a ladle truck 3 which runs on rails 56 on 4,55. Reference numeral 11 denotes a connecting plate, which is a tundish cart 1 that is self-propelled on the frame 54 and the rail 16 on the floor.
3 is fixed to engage with the connecting lever 1.
The other structure is substantially the same as the conventional device shown in FIG.

Next, the operation of this apparatus will be described. The tundish 61 is moved by the tundish carriage 13, and each nozzle 62 is set so as to match the position of each mold 70. And the tundish 61
The ladle 51 full of the molten metal 50 is placed on the ladle trolley 3 set above the nozzle, the nozzle 52 is opened, and the molten metal 5
0 is supplied to the tundish 61. When the molten metal 50 is accumulated in the tundish 61 by a predetermined amount, the nozzles 62 are opened, the molten metal 50 is distributed and supplied to each mold 70, and continuous casting is started.

When the permissible time for using the refractory material of the tundish 61 approaches, the tundish carriage 13 and the molten metal 50 equipped with a new tundish 61 that is waiting in advance are placed.
Ladle truck 3 equipped with a ladle 51 packed with
Are connected by the connecting lever 1 and the connecting plate 11 by operating the hydraulic cylinder 4, the nozzle 52 of this new ladle 51 is opened, and the molten metal 50 is replaced by a new tundish 61.
Wait for it while pouring it into the pool.

Then, when the old ladle 51 and the molten metal 50 in the tundish 61 requiring replacement are exhausted, continuous casting is interrupted, and the ladle 51, the tundish 61, the tundish carriage 13 and the connected ladle carriage 3 are interrupted. When the new ladle 51 and the tundish 61 are replaced, the nozzles 52 of the new ladle 51 and the tundish 61 are set on the respective molds 70, and the nozzles 52 are opened, a predetermined amount of the molten metal 50 is accumulated in the new tundish 61. Therefore, pouring into the mold 70 is immediately restarted to connect with the residual cast pieces in the mold 70, and continuous casting is restarted in a short time.

The present invention has been specifically described above based on the illustrated embodiments, but the present invention is not limited to these embodiments and the shape and structure thereof are within the scope of the present invention shown in the claims. It goes without saying that various changes may be added to the. For example, in the above-described embodiment, as the connecting and moving means for connecting the tundish truck and the ladle truck, the connecting plate attached to the tundish truck, the connecting lever pivotally attached to the ladle truck, and the hydraulic cylinder for rotating the connecting lever. However, as long as there is one that can connect the tundish carriage and the ladle carriage and move them in the same direction at the same time, any other suitable structure may be adopted.

[0015]

As described above in detail, in the continuous casting equipment according to the present invention, since the tundish carriage and the ladle carriage are connected to each other, the connecting and moving means for moving the tundish carriage and the ladle carriage simultaneously in the same direction are provided. The tundish trolley with the new tundish and the ladle trolley with the ladle waiting full of molten metal are connected by this connecting and moving means to allow the use of the old tundish refractory material during continuous casting. When the ladle that was waiting as time approached started pouring the molten metal into the new tundish, when the old tundish and the molten metal in the ladle were exhausted, the new tundish and this tundish that had accumulated to near the specified amount Move the ladle pouring into the dish with it and quickly replace it with this new tundish. Immediately supplying molten metal to the mold is connected to the remaining cast piece in the mold from the can resume continuous casting in a short time.

Therefore, even if the slab is a billet having a small cross section, the success rate of restarting the continuous casting after the tundish replacement is high, and the continuous operation time can be extended, so that the productivity and the economical efficiency are improved. Can be achieved.

[Brief description of drawings]

FIG. 1 is a side view showing a main part of a continuous casting facility, which is an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a side view showing a main part of a conventional continuous casting facility.

[Explanation of symbols]

 1 Connection Lever 3 Ladle Truck 4 Hydraulic Cylinder 11 Connecting Plate 13 Tundish Truck 50 Molten Metal 51 Ladle 61 Tundish 70 Mold

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Kenji Iwashita, 3-1-1, Oike, Nakamiya Oike, Hirakata-shi, Osaka, Kyoei Steel Co., Ltd. Mitsubishi Heavy Industries, Ltd. Hiroshima Works (72) Inventor Yasushi Fujikawa 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City Hishiju Steel Engineering Co., Ltd. Hiroshima branch office

Claims (1)

[Claims] 1. A continuous casting facility comprising a tundish for supplying molten metal to a mold, a tundish carriage for moving the tundish, a ladle for supplying molten metal to the tundish, and a ladle carriage for moving the ladle. Continuous casting equipment provided with a connecting and moving means for connecting the tundish truck and the ladle truck to simultaneously move them in the same direction.