EP3294470B1 - Method for producing a metallic strip in a casting and rolling process - Google Patents

Description

The invention relates to a method for producing a metallic strip in the continuous casting rolling process, in which first a slab is poured in a casting machine and fed in the conveying direction of the belt downstream rolling mill stands and rolled here.

The present invention is accordingly used in cast-rolling plants which produce a finished strip from liquid metal in continuous operation. For such systems, a strategy is proposed which can be used if an interruption of the rolling operation in rolling mills of the rolling mill occurs intentionally or unintentionally.

Known casting mills convert liquid steel in a compact plant to hot strip. First, slabs of endless length are poured. These slabs are cut by means of scissors which correspond in size to a desired hot-rolled size. In furnaces, often designed as a roller hearth furnace, the slabs are conditioned in temperature. Subsequently, the slabs are individually fed to a rolling train and rolled. Subsequently, the strips are cooled in a cooling section and reeled. The leagues leave the rolling line for further processing.

In the so-called semi-endless process, the slabs are cut so that two or more bundles can be produced from this slab. Behind the rolling mill, flying scissors are additionally arranged, which cuts the long hot strip, so that the desired waist size is achieved. With this method, the number of critical on and off rolling Reduced Ausfädel processes, so that thinner hot strips can be produced safely.

Both process forms have in common that can take place decoupled by the separation, in particular cutting the slab, the casting process and the rolling process. The possible and necessary process speeds of casting machine and rolling train are thus independently adjustable.

Due to the progress in the casting machine and in the process management, z. B. by heaters, it is possible today to dispense with dividing the slab before rolling. A so-called endless manufacturing process has been developed. The slab runs here after solidification in one piece in the rolling mill, while cast in the casting machine still on the same cast strand. The cutting of the material into coils takes place only at the flying shears behind the rolling train, and in front of a reel area.

Thus, in the case of said endless manufacturing process, operating states occur regularly in which the material from the casting machine to the reel is still connected as a physical body. The whole process takes place continuously or endlessly.

Interferences occur sporadically in systems of this size, which can extend over several hundred meters. So z. B. in case of malfunction in the hot strip mill, on a pair of scissors, etc. of the production process are interrupted. The system is then stopped and all movements of the belt or slab come to a standstill. It can happen that over the entire plant length is an undivided strand with different degrees of processing. The fact that in the various units (caster, shears, ovens, rolling mill, reel) of this strand via a Length of 100 m and more, a movement is not possible independently.

Disturbances can basically occur in all subareas, ie. H. in the area of the reel, the flying shear (s), the finishing train, the roller hearth furnace, etc. A Verwalzer in the finishing mill z. B. torn ligament between the last two scaffolding, so within a very short time leads to a jam between these scaffolding, which can only be eliminated by manual activities. This requires time-consuming work with subsequent inspection and, if necessary, repair of the plant components.

The helmsman or the automation system stops rolling in the event of a fault. The scaffolds are generally driven in the shortest possible time, all drives are stopped and the strand comes to a standstill. Since the slab is not divided up to the mold, there are cases where inevitably the casting machine comes to a standstill. This unit is particularly critical to see. If the shutdown takes too long, the steel solidifies in the mold and can only be removed with great effort.

The removal of the solidified casting strand from the casting machine is very time-consuming and often only possible by manual cutting (eg flame cutting). For this purpose, crane work is required and the mold and possibly parts of the continuous casting plant must be replaced. This leads to high downtimes and production losses and is also associated with manual operations.

Out WO 2015/101577 A1 are a method and apparatus for producing a metallic strip in the continuous casting roll method is known in which first a slab cast in a casting machine and fed to a downstream in the conveying direction of the strip finishing mill and rolled here. If a production interruption occurs in the finished rolling mill should, the band is cut at a location between the casting machine and the finish rolling mill by means of a separating device, wherein the part of the strip following the cut, is conveyed in a band memory by means of a driver, which is arranged in the conveying direction behind the separating device , Subsequently, the band is again cut through the separator, and chopped into individual parts. Finally, the tape section stored in the tape store is also shredded by the separating device by feeding this tape section opposite to the conveying direction of the tape to the separating device.

From the EP 2 259 886 B1 It is known to introduce a cut in the band in the event of a disturbance of a Gießwalzverfahrens, to bend in the conveying direction vorvoriegenden band foot up and chop the following band. However, this requires conceptually that the following strip material is still in motion. Other or similar solutions as well as special aspects of the division of the slab or the band are in the DE 198 56 767 A1 , in the DE 42 20 424 A1 , in the JP 0122 4102 A , in the JP 0527 7539 A , in the JP 6315 7750 A and in the JP 2001 276 910 A addressed.

Accordingly, during continuous casting operation in an endless system, the operation should not be interrupted as much as possible even during a planned roll change. The strand is separated, the severed band is rolled out. Subsequently, slices are cut from the strand and transported away by means of a discharge device as scrap.

The scrapers possibly stacked behind the scissors, as for example in the EP 2 259 886 B1 is proposed, it can not necessarily be returned directly into the oven. The scrap must then rather be divided in an intermediate step. In the event of a malfunction in the system, the scissors can not chop backwards. Furthermore, no scrap chute is present.

WO 2009/121678 A1 shows a method and an apparatus for producing hot-rolled products in a cast-rolling composite plant, wherein the uninterrupted continuous casting process can be maintained even in an unplanned production interruption. For this purpose, for bridging a production stoppage in a plant part, which is downstream of a device for cutting and discharging, the following process or sub-steps are carried out: a) cutting a strand section of a continuously produced starting material by means of a first pair of scissors; b) lifting the foot part of the strand section from the roller table by means of a lifting device; c) Dismembering the primary material passing through the first shears into scrap pieces by means of the first shears, discharging the scrap pieces, removing the strand section, and restoring the operational readiness of the cast-rolling composite plant.

EP 0 625 383 B1 and EP 2 428 288 B1 each show a process for the production of a metallic strip in the cast rolling process, according to the preamble of claim 1.

The invention has for its object to ensure an improved strip quality in a Gießwalzverfahren.

The invention is achieved by a method for producing a metal strip in the casting-rolling process, in which the strip is cast in a casting machine and then rolled in stands which are downstream of the casting machine in the conveying direction of the strip. In this case, at least one first separating device is arranged upstream of at least one first rolling mill stand. An induction heater is disposed upstream of the first separator such that the heater coil is brought into interaction with the induction heater for heating. A part of the strip which has a deviation from a temperature-based setpoint value is separated from the respective subsequent strip by means of the first separating device. Such

Separating a portion of the belt having temperatures deviating from a desired value causes that part to be removed from the production line and thus excluded from further rolling downstream of the induction heating. The remaining portion of the belt that meets the specifications for a desired temperature may then be rolled with predetermined rolling parameters in the mill train downstream of the first separator, with uniform material properties.

In an advantageous embodiment of the invention may be provided upstream of the induction heater, a second separator. In this case, the induction heating is then arranged between the first separation device and the second separation device. A part of the strip which has a deviation from a geometrical desired value is separated from the respective subsequent strip by means of the second separating device, and then removed from the production line. This ensures that components of the production line downstream of the second separating device, in particular the induction heating, are not damaged by such parts of the belt with deviating or faulty geometry.

When carrying out a casting rolling process, unintentional production interruptions may occur in the production line, eg due to faults. In the same way production interruptions can be intentionally brought about, for example due to a roll change. In any case, it is ensured for such cases by the invention that steel emerging from the mold and further from the casting machine or the slabs or the strip cast therefrom are removed as quickly as possible in order to minimize damage to components of the production line and disadvantageous downtimes or at best even exclude. For this purpose, the first separating device and the second separating device are arranged between the first and second rolling stands, which cut through the strip in the region between the first and second rolling stand,
wherein the band is divided into an intermediate portion, a downstream portion and an upstream portion. It is expedient if the first and second separating device are actuated simultaneously.

With respect to the portions into which the band is cut, it should be noted that the intermediate portion of the band is between the first and second separators. The downstream section is that part of the belt that is downstream of the first separator. The upstream section is that part of the belt that is upstream of the second separator.

The invention is based on the essential finding that it is possible in the event of a malfunction or interruption of production in the rolling mill, with a cutting of the tape by means of the separating devices and a subsequent chop-cutting of the respective sections of the strip, or a cutting of the respective sections of the strip into parts with a predetermined length in connection with stacking these band parts, a "jam" of the band within the rolling mill, and thus to prevent damage to rolling stands and other components of the production line. In the same way, this makes it possible to minimize or even avoid downtimes within the production line. Thus, it is possible by the present invention, in the event of malfunction or interruption occurring in the rolling mill to minimize band losses, and - after elimination of the disturbance - to get back to the normal continuous operation in a short time.

In an advantageous embodiment of the invention, the actuations of the separating means can be carried out by means of a control device. This means that by means of the control device, an operation of the separating devices is ensured.

Thus, it is possible with the aid of the control device to carry out the inventive method fully automatically, for example, until the intermediate portion of the tape has been completely removed from the area between the first and second separator, and the disturbance in the rolling mill has been resolved.

In an advantageous embodiment of the invention may be integrated in the rolling mill sensor devices by means of which a fault is detected in the rolling operation. For this case, an operation, in particular the second separating device by means of the control device is carried out fully automatically, or can be confirmed individually by the operator.

In an advantageous embodiment of the invention, the method according to the present invention can be controlled in such a way that extensive algorithms for different incidents in the system control or the aforementioned control device are stored. Upon detection of a system malfunction by the operating personnel or by the integrated in the rolling mill sensor means all available parts of the system are fully automatically or semi-automatically controlled in a manner based on a decision that an optimal for the respective operating case strategy is initiated and maintained.

In an advantageous embodiment of the invention can - viewed in the conveying direction of the belt - upstream of the induction heating a straightening device, for example in the form of a straightening unit or an insertion funnel, be arranged. Before the belt enters the induction heating, this straightening device is brought into contact with the belt, so that the belt rests as flat as possible on the roller table. Such a straightening device is particularly recommended for the case when a front end of the band has a geometric deviation in the manner of a "ski".

In an advantageous embodiment of the invention, the induction heating can be designed for a so-called "boost mode", i. for operation with a short-term overload. Such an operation of induction heating can more intensively heat the strip, and in particular the front end thereof, when a new strip is rolled out, effectively counteracting a transmission loss resulting from a possibly greater distance of the induction heating from the strip.

In an advantageous embodiment of the invention, for example as an alternative to the "boost mode" just mentioned, it is possible to provide induction coils with higher power for the induction heating, and / or to use additional induction coils in the induction heating. As a result, either a more intense heating of the belt with a constant spacing of the induction heating to the belt, or a constant heating of the belt, if a complaint of the induction heating is increased to the band, can be achieved.

• Einsatz einer Induktionsheizung, deren Spulen einzeln oder in Gruppe in der Höhe verstellt werden können;
• Einsatz einer Trommelschere mit mehreren auf den Messertrommeln angeordneten Messerpaaren für das Häckseln des Materialanfangs;
• Entsorgen der Materialanfangs in einer Aufnahmevorrichtung, z.B. einen oder mehrere Schrottbehälter unter der Anlage, die mit einem Kran entleert werden können;
• Einsatz eines übergeordneten Steuerungssystem zur Ermittlung der Eigenschaften am Materialanfang und Bestimmung der Länge des abzutrennenden Materialanfangs;
• Berücksichtigung unterschiedlicher Materialeigenschaften und Materialabmessungen bei der Bestimmung der Länge des abzutrennenden Materialsanfangs durch das Steuerungssystem; und
• Möglichkeit der Beinflussung der Länge des abzutrennenden Materialanfangs durch das Bedienpersonal.

Further advantages of the invention result from the following aspects:

• Use of an induction heater whose coils can be adjusted individually or in groups in height;
• Use of a drum shears with several arranged on the knife drums knife pairs for chopping the beginning of material;
• Disposing of the beginning of the material in a receiving device, for example one or more scrap containers under the plant, which can be emptied by a crane;
• Use of a higher-level control system for determining the properties at the beginning of the material and determination of the length of the material beginning to be separated;
• Consideration of different material properties and material dimensions in determining the length of the material to be separated beginning by the control system; and
• Possibility of influencing the length of the beginning of the material to be separated by the operating personnel.

Embodiments of the invention are described in detail with reference to a schematically simplified drawing.

Fig. 1

eine Seitenansicht eines Teils einer Gieß-Walz-Anlage, zur Durchführung eines Verfahrens gemäß der vorliegenden Erfindung,

Fig. 2

eine schematische Darstellung der Gieß-Walz-Anlage von Fig. 1,

Fig. 3

eine schematische Stirnseitenansicht einer zweiteiligen Induktionsheizung, die in eine Gieß-Walz-Anlage von Fig. 1 integriert sein kann,

Fig. 4

eine schematische Stirnseitenansicht einer Induktionsheizung, die in eine Gieß-Walz-Anlage von Fig. 1 integriert sein kann, und

Fig. 5

eine schematische Seitenansicht eines Teils einer Gieß-Walz-Anlage, zur Durchführung eines erfindungsgemäßen Verfahrens nach einer weiteren Ausführungsform.

Show it:

Fig. 1

a side view of a part of a casting-rolling plant, for carrying out a method according to the present invention,

Fig. 2

a schematic representation of the casting-rolling plant of Fig. 1 .

Fig. 3

a schematic end view of a two-part induction heating, in a casting-rolling plant of Fig. 1 can be integrated

Fig. 4

a schematic end view of an induction heater, which in a casting-rolling plant of Fig. 1 can be integrated, and

Fig. 5

a schematic side view of a portion of a casting-rolling plant, for carrying out a method according to the invention according to a further embodiment.

Fig. 1 shows a side view of a part of a casting-rolling plant, with which a strip 1 is rolled in a production line 2. This production line 2 is provided following a casting machine, wherein such a casting machine belongs to the prior art and is therefore not shown in the drawing.

The conveying direction with which the belt 1 is moved through the production line 2, is in the Fig. 1 indicated by the arrow "F".

The main components of production line 2 are explained below:
Scaffolds are provided, namely a first rolling stand 10 and, downstream thereof, a second rolling stand 11. Between these rolling stands 10, 11 a first separating device 12 and a second separating device 13 are arranged. In this case, the second separating device 3 is located upstream of the first separating device 12 in the conveying direction F of the strip 1.

Below the separating devices 12, 13 collecting spaces 14 are provided, in each of which a receiving device 16 can be introduced. The operation of these recording devices 16 is explained below in detail.

The production line 2 is equipped with a control device 17, with which the essential components of the production line 2 can be suitably controlled. The control device 17 is in the Fig. 1 only symbolically indicated, with signal lines or the like between the controller 17 and the other components of the production line 2 are not shown for simplicity.

In the production line 2 driver devices 18, 19 are provided, by means of which the belt 1 can be transported or conveyed on a roller table 4 of the production line 2.

Downstream of the first separator 12, a scale scrubber 22 is integrated into the production line 2.

The above-mentioned components of production line 2 of Fig. 1 are in the representation of Fig. 2 shown again, namely in a simplified schematic side view. With regard to the rolling stands, it should be noted that the first rolling stand 10 may be part of a roughing mill 6, wherein the second rolling stand 11 may be part of a finishing mill 8. Anyway the second rolling stand 11 is arranged downstream of the first rolling stand 10, wherein the first and second separating means 12, 13 are provided in a region between the first rolling stand 10 and the second rolling stand 11.

A method according to the present invention may be used in a production line 2 according to Fig. 1 or. Fig. 2 and works as follows:
If a disturbance or stoppage of production occurs within the production line 2, or in rolling mills (not shown) or other components of the rolling line downstream thereof, the above-described steps (a) to (d) are performed. Specifically, in step (a), the two separators 12, 13 are preferably operated simultaneously to cut the tape 1 at these locations. Thereby, an intermediate portion Z remaining between the first and second separators 12, 13, a downstream portion I located downstream of the first separator 12, and an upstream portion II located upstream of the second separator 13 are formed , Subsequently, in step (b), the downstream section I of the belt 1 is conveyed away from the first separator 12, namely in the conveying direction F, preferably by an actuation of the driving device 19 arranged downstream of the first separating device 12 Separator 12 "released" from the downstream section I, and then can be operated again. Accordingly, the intermediate portion Z of the belt 1, in step (c), is conveyed by the driving means 18 toward the first separator 12, and then cut by means of the first separator 12. In this cutting through the first separator 12, the intermediate portion Z of the belt 1 can be shredded, in which case the chopped parts of the intermediate portion Z fall down into a receiving device 16 in the form of a scrap container, which is inserted into the provided below the first separator 12 collecting space 14 is.

The upstream portion II of the belt 1, which is located upstream of the second separator 13 and is continuously fed from there in the direction of the second separator 13, is cut through in step (d) by means of the second separator 13. In this cutting, the upstream section II can also be shredded, the band chaff falling down into a receiving device 16 which is inserted into the space provided below the second separator 13 collecting space 14.

With regard to the scrap containers 16, which are introduced into the respective collecting chambers 14 for receiving the chopped strip sections, it is understood that these scrap containers 16, after complete filling, can be replaced.

As an alternative to the just-mentioned chopping of the sections of the belt 1 by means of the first and second separating devices 12, 13, it is also possible to separate these sections of the belt 1 into parts of a predetermined length by means of the separating devices 12, 13 and then to stack them into plates , For this case, in the collecting spaces 14, instead of the scrap container 16, suitable stacking means (not shown in the drawing) may be provided.

Below, further components are explained for the production line 2, on the basis of which the inventive method can be carried out according to a further embodiment.

In the area between the first separator 12 and the second separator 13, an induction heater 20 is arranged. In interaction with this induction heater 20, the band 1 can be specifically heated within the production line 2. The induction heater 20 may be formed divided: As shown schematically simplified front view of Fig. 3 are then above the belt 1, an upper induction coil 20.1 and below the belt 1, a lower induction coil 20.2 arranged. As indicated by the double arrows in Fig. 3 indicated, a distance of the induction coils 20.1, 20.2 (either individually, or synchronously with each other) can be changed to the band 1 to set a resulting height H of the induction coils 20.1, 20.2 with respect to the belt 1. The electrical connections for the induction heater 20 are in the Fig. 3 simplified by "21" indicated.

According to an alternative embodiment, the induction heater 20 may also be integrally formed, as schematically simplified in the end view of Fig. 4 illustrated. Here, too, the electrical connections for the induction heater 20 are simplified by the reference numeral "21" indicated.

Before a production stoppage occurs in the production line 2 if necessary and then the steps (a) to (d) are carried out as described, rolling of the strip 1 in the production line 2, according to a further embodiment of the method according to the invention, can be optimized by a portion of the belt 1 having a temperature deviating from a predetermined target value is cut out by the first separator 12. This has the consequence that such a type cut out part of the strip 1 in the rolling stands downstream of the first separator 12 is no longer rolled, but instead falls into the plenum below the first separator 12. This ensures that, downstream of the first separating device 12, the following part of the strip 1 is rolled exclusively at a predetermined temperature, which leads to an increased product quality.

Furthermore, it can be provided that a part of the belt 1, which has a deviation from a geometrical desired value, is separated by means of the second separating device 13 from the respectively subsequent belt 1. This ensures that geometric deviations of the belt 1, the may occur in the form of a wedge, saber or ski in particular at a front end of the belt 1, are cut out of the belt 1, so that a possible damage to system components of the rolling train is excluded by these deviations, or the rolling process downstream of the second separator 13 by these deviations are not affected.

With respect to an operation of the first separator 12, namely for separating a part of the belt 1, which has a deviation from a temperature-desired value, and the second separator 13, namely for separating a part of the belt 1, the deviation from a geometric setpoint It should be noted that this is also possible independently of the implementation of steps (a) to (b).

Fig. 5 shows - schematically simplified - a side view of a part of a production line 2, with which the inventive method can be carried out according to a further embodiment. In the Fig. 5 are compared to the representation of Fig. 2 identical components provided with the same reference numerals, and therefore not explained again in detail.

For production line 2 according to Fig. 5 At least one first separating device 12 is provided, which is arranged upstream of a rolling stand 11 and which is viewed in the conveying direction F of the strip 1. Upstream of the first separator 12, an induction heater 20 is arranged. If a part of the belt 1 should have a deviation from a temperature-based setpoint value, the first separation device 12, in the same manner as above with respect to the Fig. 2 explained, are actuated to cut out this part of the tape 1.

By operating the first separator 12, for the purpose of severing a portion of the belt 1, which has a deviation from a temperature setpoint, the negative effects on the subsequent rolling process by a colder initial material of a by a preferably divided induction heating of spilled material can be minimized. As a result, uniform material properties are obtained over the direction of the material. In the course of this, the stability and reliability of the subsequent rolling process are also increased, as well as the losses due to transition areas with, for example, decreasing material thickness reduced. In case of plant failure, the reaction time for the completion of the casting operation is increased in a continuous rolling mill.

The induction heater 20 according to Fig. 5 can be either in two parts (as in Fig. 3 ) or in one piece as in Fig. 4 ) be formed. To avoid repetition, the above explanation of the FIG. 3 and FIG. 4 directed.

Upstream of the induction heater 20 may be in the production line 2 according to Fig. 5 a straightening unit 24 may be arranged, the distance - as in Fig. 5 indicated by the double arrow - relative to the roller table 4 is variable. By lowering this straightening unit 24 in the direction of the roller table 4, it can be brought into contact with the belt 1. This makes it possible that a front end of the belt 1 rests as flat as possible on the roller table 4, and thereby compensate for example, a geometric deviation in the form of a ski.

For production line 2 according to Fig. 5 , alternatively or in addition to the straightening unit 24, it can be provided that a second separating device 13 is arranged upstream of the induction heater 24, namely in the same way as in the Fig. 2 shown and explained in detail in the appropriate place.

The induction heater 20 may already be switched on when a front end of the belt 1 or a material beginning is passed through the induction heater 20. If the induction heater 20 is formed in two parts and their induction coils 20.1, 20.2 at a greater distance from the band. 1 If the distance of the induction coils 20.1, 20.2 relative to the belt 1 can possibly not be reduced because of its geometry, then a short-term operation of the induction heater 20 in the so-called "boost mode" is optional. possible to achieve a desired heating of the belt 1.

The first separating device 12, which is arranged downstream of the induction heater 20, may be in the form of a so-called "flying shears" which completely separates the front end of the strip 1 or the beginning of the material in a desired length, or in individual pieces. Mutatis mutandis this also applies to the second separator 13, which may be provided upstream of the induction heater.

An activation of the separating devices 12, 13, the driver devices 18, 19 and also of the induction coils 20.1, 20.2 for their height adjustment is possible in each case by means of the control device 17 by the control device 17 is connected by signal technology with these components.

Finally, it should be noted separately that the control device 17 may be integrated in a (not shown) central control of the production line 2. In this case, the different processes or processes that take place when carrying out steps (a) to (d) and / or at the first or second separating device 12, 13, on the other processes in the production line 2 or the entire Casting-rolling plant tuned. If the control device 17 should be a separate module, it is understood that the control device 17 communicates suitably with the overall control of the cast-rolling plant in order to coordinate the different operating cases that take place in the production line 2.

LIST OF REFERENCE NUMBERS

1

tape

2

production line

4

roller table

6

roughing mill

8th

Finishing mill

10

first rolling stand

11

second rolling stand

12

first separator

13

second separator

14

plenum

16

cradle

17

control device

18, 19

driving means

20.1

Inductor / above

20.2

Inductor / below

22

descaling

24

leveler

F

conveying direction

H

Height (of the induction coils, with respect to the band 1)

Z

Intermediate section of the tape 1

I

Downstream section of the tape 1

II

Upstream section of the belt 1

Claims (7)

1. Method of producing a metallic strip (1) in a casting and rolling method, in which the strip (1) is cast in a casting machine and subsequently rolled in rolling mill stands downstream of the casting machine in conveying direction (F) of the strip (1), wherein at least one first separating device (12) arranged upstream of at least a first roll stand (10) is provided, wherein an induction heating means (20) is so arranged upstream of the first separating device (12) in conveying direction (F) of the strip (1) that, for heating, the strip (1) is brought into interaction with the induction heating means (20), characterised in that a part of the strip (1) having a deviation from a target value in terms of temperature is separated from the respective succeeding strip (1) by means of the first separating device (12).
2. Method according to claim 1, characterised in that a second separating device (13) is arranged upstream of the induction heating means (20), wherein the induction heating means (20) is arranged between the first separating device (12) and the second separating device (13) and wherein a part of the strip (1) having a deviation from a geometric target value is separated from the respective succeeding strip (1) by means of the second separating device (13).
3. Method according to claim 1 or 2, characterised in that the induction heating means (20) is of divided construction, wherein induction coils of the induction heating means (20) are arranged not only above (20.1), but also below (20.2) the strip (1), the induction coils (20.1, 20.2) preferably being adjustable above and below the strip (1) respectively independently of one another in the spacing thereof from the strip (1) so as to set a predetermined height (H) from the strip (1).
4. Method according to any one of claims 1 to 3, characterised in that a straightening device (24) is arranged upstream of the induction heating means (20) in conveying direction (F) of the strip (1) and can be brought into contact with the strip (1), preferably with a front end of the strip (1), in such a way that the strip (1), preferably the front end thereof, through the contact with the straightening device (24) rests flatly on a roller path (4) of the rolling mill, the straightening device (24) preferably being constructed in the form of a straightening unit or an introducing funnel.
5. Method according to any one of claims 1 to 4, characterised in that the induction heating means (20) is temporarily operated in an overload mode so as to sufficiently heat the strip (1), preferably a front end thereof.
6. Method according to any one of claims 1 to 5, characterised in that additional induction coils (20.1, 20.2) are integrated in the induction heating means (20).
7. Method according to any one of claims 1 to 6, characterised in that the first separating device (12) is activated in dependence on a temperature of the strip (1) or the second separating device (13) is activated in dependence on geometric dimensions of the strip (1), the strip (1) preferably being cut by the first separating device (12) and/or by the second separating device (13) into parts each with a predetermined defined length.

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