EP2881185A1 - Method and device for producing a metallic strip in casting and rolling - Google Patents

Abstract

The invention relates to a method for producing a metallic strip (1) in the cast rolling process, in which first a slab is poured in a casting machine (2) and fed to at least one downstream in the conveying direction (F) of the strip rolling mill (3) and rolled here, wherein the finished rolled strip (1) in the conveying direction (F) behind the rolling mill (3) by means of a reeling device (4) is reeled. In order to increase the system flexibility, the invention provides that a means comprising at least two rotor reels (4 ') or at least one rotor reel (4') and at least one underfloor reel (4 ") is used as the reeling device (4), wherein rewinding of a strip (1) having a thickness of less than 0.7 mm, the at least one rotor bobbin (4 ') is used, Furthermore, the invention relates to a device for producing a metallic strip in the casting-rolling process.

Description

The invention relates to a method for producing a metal strip in Gießwalzverfahren in which first a slab poured in a casting machine and fed to at least one downstream in the conveying direction of the strip rolling mill and rolled here, wherein the finished rolled strip in the conveying direction behind the rolling mill by means of a coiler is reeled. Furthermore, the invention relates to an apparatus for producing a metallic strip in the casting roll process.

For the production of a strip in the Gießwalzverfahren plants are well known in which a slab is first produced in a casting machine. The vertical slab emerging from a mold is deflected in the horizontal and then fed to a rolling mill, in which the strip is rolled out of the casting heat. After the rolling process, the tape is reeled. As required, further ovens and cooling devices are used; Furthermore, the rolling mill can consist of several elements (roughing and finishing mill).

There are various possibilities for coiling. In the DE 603 07 496 T2 Reels are provided which can be designed as underfloor reels. The WO 99/25501 A1 sees at the end of the system, two reels at the same position - in the conveying direction of the tape - before, which are each classically trained and can be designed as underfloor reels. Similar solutions show the EP 1 016 471 A1 and the DE 699 28 559 T2 , An alternative solution shows the EP 1 003 617 B1 where a rotor reel is described and used. This has two on a drum rotatably arranged reels.

A disadvantage of the prior art generic method that there are sometimes inflexibilities with respect to the reeling of a finished strip. This is especially true in the case of the fact that bands of different thickness are produced on the plant.

The invention is in the light of this problem, the task of proposing a generic method for the production of a metallic strip and a corresponding device with which the flexibility of the production or the system can be increased in a simple manner without having to invest significant resources ,

The solution of this problem by the invention is characterized in that a device comprising at least two rotor reels or at least one rotor reel and at least one underfloor reel is used as reel means, wherein for the reeling of a tape having a thickness of less than 0.7 mm, the at least one Rotor reel is used. Preferably, at least one underfloor reel is used for coiling a strip having a thickness of more than 3.0 mm.

The strip production can be done in a continuous casting rolling process in continuous operation or semi-continuous operation; but it is also possible that the tape production takes place in a batch mode. This allows a high system flexibility.

As a reeling device according to a preferred embodiment of the invention, a device with a single rotor reel and a single underfloor reel is used.

However, it is also advantageously possible that a reel device with a single rotor reel and two underfloor reels is used. A separation of the band can take place in front of the reel device, whereby a flying pair of scissors is preferably used for separating the band.

The apparatus for producing a metallic strip in the casting-rolling process comprises a casting machine, at least one rolling mill arranged downstream of the casting machine in the conveying direction, and a coiling device downstream of the rolling mill in the conveying direction. According to the invention, it is provided in such a device that the reeling device comprises at least two rotor reels or at least one rotor reel and at least one underfloor reel.

In front of the reeling device, scissors are preferably arranged, preferably a flying pair of scissors.

The at least one rotor reel preferably has two reel mandrels.

The strip is produced in particular by the hot rolling process.

The rotor reels or underfloor reels provided according to the invention are known as such in the state of the art, for which purpose reference is expressly made to the documents cited above.

With the proposed reel combination in hot rolling mills, an advantageous and flexible production of a metallic strip can take place.

The stable coiling of ultra-thin hot strip with a thickness of less than 0.7 mm can be done by means of the rotor reel. Equally, the combination of rotor reel and underfloor reel has proven itself.

1. a) 1 Rotorhaspel und 1 Unterflurhaspel;
2. b) 1 Rotorhaspel und 2 Unterflurhaspel;
3. c) 2 Rotorhaspel;
4. d) 1 Unterflurhaspel und 1 Rotorhaspel;
5. e) 2 Unterflurhaspel und 1 Rotorhaspel.

In contrast to a conventional reel (eg an underfloor reel), no deflection of the hoop tip is required for insertion into the rotor reel. The rotor reel is preferably operated in combination with an underfloor reel. This can maximize plant availability. Possible variants are (in this order):

1. a) 1 rotor reel and 1 underfloor reel;
2. b) 1 rotor reel and 2 underfloor reel;
3. c) 2 rotor reels;
4. d) 1 underfloor reel and 1 rotor reel;
5. e) 2 underfloor reels and 1 rotor reel.

In the case of the solution a) (1 rotor reel and 1 underfloor reel) there is the advantage that in the case of failure of a rotor reel continues to produce bands with a thickness greater than or equal to 0.7 mm in batch mode - even with 2 underfloor reels can. This enables a high system availability.

In the case of the solution b) (1 rotor reel and 2 underfloor reels) there is the advantage that in the case of failure of a rotor reel further bands with a thickness of greater than or equal to 0.7 mm in the endless or semi-endless operation with the two Underfloor coiler can be produced. This in turn allows a high system availability.

In the case of solution c) (2 rotor reels) there is the advantage that a minimum system length can be achieved. Furthermore, there is a redundancy, which is advantageous in the case of failure of a rotor reel. In the case of the solution d) and e) (1 or 2 underfloor reels and 1 rotor reel) is a simple structural design. The use of Füllrollgängen may optionally be provided. Furthermore, the possibility of extending the rotor reel can be provided.

Tapes less than 0.7 mm thick and up to 3.0 mm thick can be wound with the rotor reel (or multiple reels). However, strips of thickness greater than or equal to 3 mm are preferably wound with a conventional underfloor reel (or with several underfloor reels).

The highest process stability is achieved by the shortest possible distance between the rotor reel and the flying shears. An advantageously used high speed shear can cut the tape at full speed.

The tape can be wound at maximum rolling speed.

The single rotor reel already fulfills the tasks of two conventional reels. 2 reel mandrels, 1 Anwickelsystem, 1 Treibapparat, 1 inlet guide and 1 Bundausfahrwagen can be used.

Advantageously, all bands can be wound under exactly the same conditions.

The Anwickelsystem can consist of the following elements: 3 pressure rollers, 3 deflection shells, 3 control cylinder with step control.

After Anwickeln the Anwickelsystem can be driven out of the reel.

The finish winding and discharge of the coils can always be done in the same position.

The tape end rollers can be used to hold the outer turns while braking the tape to a stop.

Fig. 1

schematisch eine Gieß-Walz-Anlage für die Herstellung eines Stahlbandes im Warmwalzverfahren,

Fig. 2

die Haspeleinrichtung der Anlage gemäß Fig. 1 gemäß einer ersten alternativen Ausgestaltung,

Fig. 3

die Haspeleinrichtung der Anlage gemäß Fig. 1 gemäß einer zweiten alternativen Ausgestaltung,

Fig. 4

die Haspeleinrichtung der Anlage gemäß Fig. 1 gemäß einer dritten alternativen Ausgestaltung,

Fig. 5

die Haspeleinrichtung der Anlage gemäß Fig. 1 gemäß einer vierten alternativen Ausgestaltung.

In the drawings, embodiments of the invention are shown. Show it:

Fig. 1

schematically a casting-rolling plant for the production of a steel strip in the hot rolling process,

Fig. 2

the reel device of the system according to Fig. 1 according to a first alternative embodiment,

Fig. 3

the reel device of the system according to Fig. 1 according to a second alternative embodiment,

Fig. 4

the reel device of the system according to Fig. 1 according to a third alternative embodiment,

Fig. 5

the reel device of the system according to Fig. 1 according to a fourth alternative embodiment.

In Fig. 1 a casting-rolling plant is sketched, which is designed as a full-Konti plant and which includes a casting machine 2 and a rolling mill 3 as central elements. In the conveying direction F behind the casting machine 2, the rolling mill 3 is arranged, which may also be a roughing mill and a downstream finishing mill. Commonly used furnace equipment and cooling systems are not shown. Behind the rolling mill 3 is a flying shears 5. In the conveying direction F then closes a Coiler 4 on. With the system, a band 1 can be made, which is wound in the coiler 4 to form a coil.

To increase the flexibility of the system, the reeling device 4 comprises at least two rotor reels 4 'or at least one rotor reel 4' and at least one underfloor reel 4 ".

It generally applies that the rotor reel 4 'is provided for the winding of a strip 1 with a thickness of less than 0.7 mm.

In Fig. 1 is a first embodiment to see, in which the reeling device 4, first a single rotor reel 4 'and then a single underfloor reel 4 "has.

In the FIGS. 2 to 5 For this purpose, alternative embodiments can be seen.

In Fig. 2 the reeling device 4 has two rotor reels 4 'following one another in the conveying direction.

On the other hand, the reel device 4 has according to the embodiment Fig. 3 first a rotor reel 4 ', to which two underfloor reels 4 "connect.

In the solution according to Fig. 4 follows a underfloor reel 4 "a rotor reel 4 'after.

Finally, according to the further alternative embodiment Fig. 5 provided that initially two Unterflurhaspeln 4 "are present, to which in the conveying direction F a rotor reel 4 'is connected.

Optionally, a tape 1 can be rewound from a rotor reel 4 'if its thickness is between 0.6 and 0.8 mm.

LIST OF REFERENCE NUMBERS

1

tape

2

casting machine

3

rolling mill

4

coiler

4 '

Rotary coiler

4 '

Downcoilers

5

Separating device (flying shears)

F

conveying direction

Claims (10)

Process for the production of a metallic strip (1) in the casting rolling process, in which first a slab is cast in a casting machine (2) and fed to at least one downstream rolling mill (3) in the conveying direction (F) of the strip (1) and rolled here, wherein the finished rolled strip (1) in the conveying direction (F) behind the rolling mill (3) by means of a reeling device (4) is reeled,
characterized,
in that a device comprising at least two rotor reels (4 ') or at least one rotor reel (4') and at least one underfloor reel (4 ") is used as the reeling device (4), wherein for reeling a tape (1) with a thickness of less than 0.7 mm, the at least one rotor reel (4 ') is used. A method according to claim 1, characterized in that for rewinding a tape (1) with a thickness of more than 3.0 mm, the at least one underfloor reel (4 ") is used. A method according to claim 1 or 2, characterized in that the strip production takes place in a continuous casting rolling process in continuous operation or semi-continuous operation. A method according to claim 1 or 2, characterized in that the strip production takes place in a batch mode. Method according to one of claims 1 to 4, characterized in that a means with a single rotor reel (4 ') and a single underfloor reel (4 ") is used as a reeling device (4). Method according to one of claims 1 to 4, characterized in that a device with a single rotor bobbin (4 ') and with two underfloor reels (4 ") is used as a reeling device (4). Method according to one of claims 1 to 6, characterized in that before the reel device (4) a separation of the belt (1), wherein for separating the belt (1) preferably a flying shears (5) is used. Apparatus for producing a metallic strip (1) in the casting-rolling process, comprising a casting machine (2), at least one rolling mill (3) arranged downstream of the casting machine (2) in the conveying direction (F) and a coiling device downstream of the rolling mill (3) in the conveying direction (F) (4), in particular for carrying out the method according to one of claims 1 to 7,
characterized in that
the reel device (4) comprises at least two rotor reels (4 ') or at least one rotor reel (4') and at least one underfloor reel (4 "). Apparatus according to claim 8, characterized in that in front of the reeling device (4) a pair of scissors (5) is arranged, preferably a flying scissors. Apparatus according to claim 8 or 9, characterized in that the at least one rotor reel (4 ') has two reel mandrels.

Images