JPH0775764B2 - Metal ribbon casting / rolling equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a casting / rolling facility capable of efficiently rolling a metal ribbon obtained by continuous casting from a molten metal according to its type. .

[Conventional technology]

Recently, from molten metal such as molten steel, several mm to several tens, which is close to the final shape
A continuous casting method for directly producing a metal ribbon having a thickness of about mm has attracted attention. According to this method, the rolling process in multiple stages as in the prior art can be omitted, so that the process and equipment can be simplified. In addition, since heat treatment for heating the material to the processing temperature is essentially unnecessary between each process, an energy saving effect can be expected. Various continuous casting methods such as a twin belt method, a single belt method, a twin drum method, and a single drum method have been proposed so far.

FIG. 3 is a diagram showing an outline of a twin-belt type continuous casting machine among them. In this continuous casting machine, the molten metal in the tundish 1 is supplied from the nozzle 2 to the casting space. The casting space is formed by partitioning opposite sides of a pair of belts 4 made of a heat resistant material such as steel running around the pulley 3 with short side molds (not shown). There is. The molten metal poured into this casting space is cooled and solidified by the cooling box 6 and is carried out as the metal ribbon 7.

Further, JP-A-59-153555 discloses that the manufactured metal ribbon is wound into a coil and the coil is heated or soaked in a heating furnace connected to the coil transfer line. .

[Problems to be solved by the invention]

The metal ribbon produced by this continuous casting apparatus has a wide variety of types. Therefore, it is necessary to adjust conditions such as temperature-time history before rolling according to the type of final product. For example, for a material that is continuously annealed, a holding time before rolling of about 20 minutes is required.

However, in conventional equipment, since there is only one transport system from the continuous casting machine to the rolling mill, it is not possible to adjust the pre-rolling conditions that differ depending on the type simply by incorporating the heating furnace in the coil transfer line. . Therefore, this condition adjustment becomes a bottleneck, and the operating efficiency of the continuous casting machine and / or the rolling machine must be lowered, resulting in a decrease in productivity. This problem is not limited to the twin-belt type continuous casting apparatus shown in FIG. 3, and is the same in any of the other single-belt type, twin-drum type, single-drum type and the like.

Therefore, the present invention provides a continuous casting machine due to the adjustment of the conditions before rolling by improving the coil transport system when transporting the metal strip obtained by continuous casting from molten metal to the rolling process. And / or efficiently casting and rolling a metal strip without lowering the operating efficiency of the rolling mill.

[Means for solving problems]

MEANS TO SOLVE THE PROBLEM The metal strip casting / rolling equipment of the present invention has a continuous casting device for continuously casting a metal strip from a molten metal, and a heat insulation for transporting the coiled metal strip after casting. A coil trolley on which a coil box with a device is placed, and a rolling mill that rewinds and rolls a coiled metal strip, and between the continuous casting device and the rolling mill, the continuous casting device and the rolling device. A transport path that directly communicates with the machine,
And a transfer path passing through a coil station having a function of keeping the coil-shaped metal ribbon warm for a long time through a coil carriage on which the coil box with the heat retention device is mounted, and two transfer paths are provided. And

〔Example〕

Hereinafter, the features of the present invention will be specifically described by way of examples with reference to the drawings.

FIG. 1 shows an arrangement from a continuous casting apparatus to a rolling mill in an embodiment of the present invention, and FIG. 2 shows a heating state of a coil-shaped metal ribbon in a coil station.

As the continuous casting apparatus A in this example, a twin belt type apparatus as shown in FIG. 3 was used. The metal ribbon 7 carried out from the continuous casting apparatus A is a coiler B.
After being wound into a coil by, the coil is loaded on the coil carriage D, the coil box C is sealed, and the coil box C is conveyed to the coil station E via the conveying path L ₁ . In this coil station E, the coiled metal ribbon 8 is retained for a holding time determined according to the type of the coiled metal ribbon 8 and is connected to the gas pipe 9 and the air pipe 10 installed in the coil station E. After heating / or heat retention / retention, the coil carriage D equipped with the coiled metal ribbon 8 travels to the rolling mill F via the transport path L ₂ . Then, the coiled metal ribbon 8 is
It is unwound while being taken out from the coil box C, and is rolled into a predetermined shape by the rolling mill F.

As described above, the continuous casting apparatus A is also connected to the rolling mill F by the transfer path L _{3 in addition} to the coil transfer system passing through the transfer paths L ₁ to L ₂ . That is, this is a route for directly carrying the coil-shaped metal ribbon 8 manufactured by the continuous casting apparatus A to the rolling mill F while being loaded on the coil carriage D and sealing the coil box C.

As described above, the continuous casting apparatus A and the rolling mill F are connected by the two-passage paths, so that the coil-shaped thin metal strip 8 is formed.
The degree of freedom in adjusting the conditions before rolling increases according to the type of.
For example, when rolling a thin metal strip 8 made of a material such as a tin plate material, a cold-rolled material without continuous annealing, or a hot-rolled final material that does not require special adjustment of conditions before rolling, a conveying path is used.
By moving the coil carriage D via L ₃ , the coiled metal ribbon 8 is transferred to the rolling mill F. On the other hand, in the case of materials that require adjustment of conditions before rolling, such as extension for continuous annealing, the materials are conveyed by the conveyance path L ₁ and the conveyance path L ₂ ,
The coil station E is allowed to stay for the required time.

Here, the coil carriage D is equipped with a heat retaining device sufficient to heat and retain the coiled metal ribbon 8 during the transportation time from the continuous casting device A to the rolling mill F. This is because even if the continuous casting apparatus A directly conveys it to the rolling mill F via the conveyance path L ₃ , the coil-shaped metal strip 8 necessary for rolling.
This is useful for securing the temperature of and uniforming. Also, as shown in FIG.
9. It has a device which is connected to the air pipe 10 and heats / or keeps the temperature of the coil-shaped thin metal strip 8.

Therefore, even in the case where the coil-shaped metal thin strip 8 that needs to be retained is manufactured first, the time required for the retention can be taken sufficiently. Further, while the coil-shaped metal ribbon 8 is retained, the coil-shaped metal ribbon 8 that is cast later and does not require retention is first transferred to the rolling mill F via the transport path L _3.
It can be transported to and rolled. As a result, rolling mill F
It is possible to eliminate the play time.

Further, if the rolling mill F fails for some reason, the coiled metal strip 8 is heated and kept warm at the coil station E while the work-in-process coil is mounted until restoration, which hinders rolling after restoration. The temperature can be maintained at a non-existing temperature, and can also serve as a buffer for matching the production of the continuous casting apparatus A and the rolling mill F.

Further, the coil-shaped metal ribbon 8 is provided to the rolling mill F, and the coil carriage D on which the empty coil box C is placed is the next coil-shaped metal ribbon 8 cast from the continuous casting apparatus A.
Although it is returned to the continuous casting apparatus A for carrying, the coil box C can be preheated via the coil station E on the way. In the preheated coil box C, the next coil-shaped metal ribbon 8 is mounted in a high temperature state. It also helps save energy.

In the embodiment of the present invention, the coil carriage D uses a self-propelled coil carriage, but it does not matter even if it is a traveling type using another power unit.

〔The invention's effect〕

As described above, in the casting / rolling equipment of the present invention, the rolling conditions according to the type of the continuously cast metal strip without affecting the operation of the continuous casting device and / or the rolling mill. Can be adjusted to. Therefore, the continuous casting device and the rolling mill can be operated efficiently, and since there is a sufficient margin for adjusting the conditions, rolling can be easily performed, and the obtained product also has excellent quality. .

[Brief description of drawings]

FIG. 1 shows an arrangement from a continuous casting apparatus to a rolling mill in an embodiment of the present invention, and FIG. 2 shows a heating state of a coil-shaped metal ribbon in a coil station. FIG. 3 shows a conventional twin belt type continuous casting apparatus.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Noriyuki Kanai No. 1 Nishinosu, Oita, Oita, Oita Pref. Nippon Steel Co., Ltd. Oita Works (72) Hideyuki Takahama No. 1 Nishinosu, Oita, Oita, Japan Steel Works Co., Ltd. Oita Works (56) References Japanese Patent Publication Sho 60-16848 (JP, B2)

Claims (1)

[Claims] 1. A continuous casting device for continuously casting a thin metal strip from molten metal, a coil carriage on which a coil box with a heat retaining device for transporting a coiled thin metal strip after carrying is mounted, and a coiled carrier. It consists of a rolling mill that rewinds and rolls the metal strip, and between the continuous casting device and the rolling mill, a conveying path that directly connects the continuous casting device and the rolling mill, and the heat retaining device. Two types of transport paths are provided: a transport path passing through a coil station having a function of keeping a coil-shaped metal ribbon warm for a long time via a coil carriage on which a coil box is mounted. Casting / rolling equipment.