JPH04200961A - Continuous casting apparatus - Google Patents

Abstract

PURPOSE:To make casting workability in a continuous casting extremely good by making transporting rails for a tundish car circular rails assembling a mold and arranging a preheating device at one side and a waiting position at the other side in both sides of the mold. CONSTITUTION:The inner and outer circular rails 7 passing the molds 1A, 1B, are arranged as centering one point P to discharging direction of cast slabs in the molds 1A, 1B, and the tundish cars 3A, 3B are freely transported. When casting from the tundish 4A on this circular rails 7 completes, the tundish car 3A is transported to a waiting position at the left side, and the new tundish 4B preheated with a preheating device 6 at the right side is immediately transported above the molds 1A, 1B with the tundish car 3B, and molten steel is poured from a ladle 12B on a ladle turret 11 to execute the casting. Then, parallel rails 8A, 8B for dummy bar cars 9a, 9B are arranged so as to cross at the right angle with the molds 1A, 1B. By this method, the continuous casting work is executed very efficiently.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a continuous casting device, and particularly to a continuous steel casting device that can smoothly carry out individual casting operations and continuous casting operations.
Widely used in continuous steel casting field.

[Conventional technology]

Continuous casting equipment generally used in steelmaking is designed taking into consideration various factors such as the shape of the slab to be manufactured, the number of strands, the type of steel to be manufactured, the height of the building, and the storage area. Various types of continuous casting equipment are used. For example, as shown in Fig. 2, ■ = Vertical type VB = Vertical bending type VPB: Vertical progressive pending type CB: Circular arc curved type cps: Multi-stage arc curved type In Fig. 2, C: Cutting zone S: Indicates the captain.

As described above, in addition to the vertical and curved classifications of continuous casting equipment, there are also many types of tundishes for storing molten steel and evacuation methods, as described below.

For example, in a continuous casting machine having 2 1-land to 1-L land, 2 molds A
, 1B are provided, these templates IA, 1B
Two parallel tracks 2 are provided in a direction perpendicular to the discharge direction of the slab to be pulled from the slab, and these parallel tracks 2
” Two tanditshu cars 3A and 3B were running on the second track.
This is an example in which tandish cars 3A and 3B are loaded with tandishes 4A and 4B, respectively. In this case, one Tanditushka 3A is used for molds IA and IB.
When the casting is finished, the other tan tissue car 3B, which contains molten steel, moves directly above the molds 1A and 1B, and pours two pieces. It is possible to continue casting from each tanditush nozzle, so continuous casting is possible.

In this case, other tanditushka 3B that has finished casting
If you evacuate to the right side in the figure, Tanditushka 3
During the casting of B, the waiting tundish 3A received from the new molten steel ladle is moved to the second part of molds A and 1B, and casting can be continued continuously. However, in this case, the standby devices of Tanditushkar 3A and 3B are the molds IA and I.
There are two places on the left and right with B in between, so Tanditshu 4A
, 4B preheating devices 5 had to be installed in two places on the left and right, and hot recycling devices for hot repairs also had to be installed in two places, which caused problems with the equipment 311 and the difficulty of the work. .

Furthermore, as shown in FIG. 4, there is also a system in which there is a parallel track 2 in the direction of discharge of the slab, and the tandish car 3 runs along this track. In this method, as shown in Fig. 4, the tundish 4 is loaded onto the tundish car 3 at a standby position, and after being preheated by the preheating device 5, the tundish 4 is moved forward and placed in the molds IA and 1-B. The method is to cast each piece from the nozzle, but in this case, the fully cast tundish 4 is taken down at the standby position shown in the figure, and after being sent to the repair yard, a new tundish is placed on it.
After that, the molten steel must be received from the ladle, so
Since this changeover takes a long time, continuous casting is impossible.

Furthermore, as an example of another conventional device, there is a method as shown in FIG. This method uses a tower 1 that revolves around a certain point.
- 〇 is installed, two tundish cars 3A and 3B are loaded on the turret 6'', preheating devices 5 etc. are installed on the left and right in the direction of discharge of the slab, and the tundish 4A containing molten metal is installed in the direction of discharge of the slab. When the tundish 4A has completed casting, the tundish 4A swivels the tundish 1-6 to move aside and is replaced by another tundish containing molten steel. 4B can be rotated directly above the mold to cast molten steel.

Therefore, even with this method, two Tanditshu cars 3A and 3
If two tandishes 4A and 4B by B are loaded, continuous casting is possible. However, this turret system has a large turning radius in the case of a Taku 1-land continuous casting machine or a 2-strand continuous casting machine with a wide 1-land spacing. The driving device in the center of the tower I is large, and this system itself is difficult to implement when considering the work space and the arrangement with other equipment.

[Problem to be solved by the invention]

We have discussed whether or not continuous casting is possible in the case where the above-mentioned continuous casting equipment has one or two strands of upper equipment such as the two-part tanditsuka, mold, and preheating device, but the conventional equipment Even if continuous casting is possible, there are disadvantages such as increased equipment costs such as the need to install double preheating equipment and hot recycling equipment due to temporary repair of the tundish, or poor workability. There is.

The object of the present invention is to provide a continuous casting device for tanditushka;
The object of the present invention is to provide a continuous casting device at a low cost that enables continuous casting in the connection of molds and auxiliary equipment, and allows the casting work to be carried out smoothly.

[Means to solve the problem]

The gist of the present invention is as follows.

That is, a tundish that accommodates the molten metal transported in a ladle, a water-cooled vibratory mold that receives the molten metal contained in the tundish, and a secondary cooling device that cools the slab formed in the mold. In a continuous casting apparatus comprising a pinch roll for pulling out the slab, a one-to-one cutter for cutting the slab pulled out by the pinch roll, and a tummy bar table for retracting the dummy bar, the tundish is A closed-loop circular orbit on which a loaded tanditsu car runs with wheels, a mold installed in the circular orbit, a tanditsu preheating device provided on one side of the circular orbit that sandwiches the mold, and a tanditsu preheating device installed on one side of the circular orbit that sandwiches the mold. a shelter place for another tanditshuker provided on the other side of the circular orbit, and a dummy bar top charge charging device provided movably across the circular orbit in a direction orthogonal to the mold; This is a continuous casting device characterized by having.

An embodiment of the continuous casting apparatus according to the present invention will be described with reference to FIG. 1 in the case of a two-slot one-land type.

An inner and outer circular track 7 is provided that passes through the molds IA and 1B, centered at a point P in the slab discharge direction of the two-strand molds IA and IB, and a tanditshu car that can freely move on this circular track 71- is provided. 3A and 3B are provided,
Each is loaded with tanditshu 4A and 4B. A preheating device 5 is provided only on one side of the circular orbit 7, on the right side in the figure.

On the other hand, in the slab discharge direction of molds LA and IB,
Orthogonal to the molds 1-A and IB, parallel orbits 8A,
8B, and dummy barkers 9A and 9B are configured to run on the parallel tracks.

Further, on the outer peripheries of the molds IA and 1B, openings 10 are provided to be used for replacing the molds A and IB and the secondary cooling segment 1 directly below each mold. Mold IA,
There is a ladle in the direction opposite to the slab discharge direction of 1B],
A dollar turret 11 is provided on which 2A and 12B are placed.

The upper device of the continuous casting device according to the present invention is constructed as described above, and the other devices are the same as the conventional device.

The second problem of "design of the device of the present invention" will be explained.

The size of the inner and outer diameters of the circular orbit 7 is determined by the mold IA at the casting position,
1B and the size of the opening where the secondary cooling segment 1- directly under the mold can be replaced]-0. In this case, there are Tanditushkas 3A and 3B waiting on the left and right,
Naturally, it is necessary to prevent the dummy barkers 9A and 9B from interfering with each other. In addition, the center P of the circular orbit 7 is preferably in the discharge direction of the slab from the positions of the molds IA and IB as shown in the figure, and in the case of the opposite discharge direction,
This is not preferable because it interferes with the foundations of the ladle turrets 1 to 11 or the support columns of the ladle car.

In Fig. 1, the preheating device 5 is located at one place on the right side of the circular track 7, but in a continuous casting machine using a dummy bar tube charging method, it needs to be outside the running range of the dummy barker. This does not apply to other charging methods.

[For production]

The tongue tissue 3A, which has finished casting two strands in the circular orbit 7'' on the mold L A, 1-B, moves counterclockwise on the circular orbit 7 and retracts to the left side of the figure. The new tongue tissue 4B preheated by the preheating device 5 on the right side immediately travels counterclockwise and fills the molds 1A and IB.
It stops at the top and receives injection of molten steel from the ladle 12B placed on the ladle talent 11.

In the case of the same steel type as the previous tundish 4A, while the molten steel from tandish 4A still remains in molds IA and 1B, continuous casting can be continued by injecting new molten steel of the same steel type from tandish 4B. can.

In the case of different types of steel, while a small amount of the 7s steel from the previous tundish 4A remaining in the molds 1A and 1B remains in the molds 1A and 1B, coolant etc. is poured from the second part of the mold. After solidifying, a tundish of different types of molten steel is placed on top of it.
Continuous casting can be performed by pouring the molten steel from B.

As described above, according to the apparatus of the present invention, the tundish can be replaced within a few minutes and continuous casting can be carried out.

While casting is being carried out by Tanditshu 4B, Tanditshu 4A, which was on standby, discharges the remaining steel and residue, completes minor repairs, moves counterclockwise on circular orbit 7'' by Tanditshu Car 3A, and moves to the right. It is preheated by a preheating device 5 provided in the ladle 12A, and waits on a circular orbit 7'' on the right side of the figure to receive molten steel of a different steel type from the next ladle 12A.

In addition, even in a continuous casting machine using the dummy bar 1 to tube charging method in the initial stage of casting, the parallel tracks 8A and 8B are connected to the mold 1A.
, 1B, the tundish preheating device 5 is located on the right side of the circular orbit 7, and the tundish preheating device 5 is installed on the right side of the circular orbit 7 without interfering with the dummy bar tube charging work.
, 4B preheating is possible.

Furthermore, since the Tanditshu cars 3A and 3B according to the present invention have an independent driving device, they can travel to any position on any circular track 7-. , 4B, it is desirable to supply the various materials used for repairing using an en-1-less cable carrier.

〔Effect of the invention〕

Since the continuous casting apparatus of the present invention is constructed as described below, it has been able to achieve the following effects.

(a) According to the present invention, since the running track of the Tanditshukar is made into a circular track by incorporating a mold, it is possible to provide a preheating device on one side that holds the mold and use the other side as a shelter place for the Tanditshukar. As a result, the workability of casting in continuous casting was extremely good, and equipment costs could be kept to a minimum.

(b) Since the top charge charging device of the dummy bar can be moved in a direction perpendicular to the mold, it does not interfere with the preheating work of the tundish, and the workability is extremely good.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an upper device in an embodiment of the continuous casting device according to the present invention, FIG. 2 is a schematic sectional view showing the concept of various conventional continuous casting devices, and FIGS. 3, 4, and 5. FIG. 2 is a plan view showing an upper device similar to FIG. 1 in a conventional continuous casting apparatus. IA, 1B ・・・・・・Mold 2.8A, 8
B・・・・・・・・・Parallel orbit 3 (3A, 3B)
・・・・・・・・・Tanditshukar 4 (4A, 4
B)・・・・・・Tandish 5・・・・・・
...Preheating device, 7...Circular orbit 9
・・・・・・・・・Dummy Barker】O・・・・・・・・・Opening

Claims (1)

[Claims] (1) A tundish that accommodates the molten metal transported in a ladle, a water-cooled vibrating mold that receives the molten metal contained in the tundish, and a secondary cooling device that cools the slab formed in the mold. , a continuous casting apparatus comprising a pinch roll for pulling out the slab, a torch car for cutting the slab pulled out by the pinch roll, and a dummy bar table for retracting the dummy bar; A closed-loop circular orbit on which a date shuttle runs with wheels, a mold installed in the circular orbit, a tundish preheating device installed on one side of the circular orbit sandwiching the mold, and a circle sandwiching the mold. a shelter place for another tandem dumpster provided on the other side of the track; a dummy bar top charge charging device provided movably across the circular track in a direction orthogonal to the mold;
A continuous casting device characterized by having: