EP3024601B1 - Method and device for producing a metallic strip in a continuous casting and rolling process - Google Patents

Description

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

The present invention is used in cast-rolling plants that produce a finished strip of liquid metal in continuous operation. For such installations an emergency strategy for disturbances is proposed.

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 their dimensions 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 will Reduces the number of threading and unthreading processes that are critical during rolling, so that thinner hot strips can be produced more safely.

Both process forms have in common that by cutting the slab the casting process and the rolling process can take place decoupled. 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 full-conti-process was 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 division of the material into coils takes place only at the flying shears behind the rolling mill.

So it comes in said full-Konti process regularly operating conditions in which the material from the caster 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 over a length of 100 m and more, a movement is not possible independently.

Disturbances can basically occur in all sub-aggregates, ie in the area of the reel, the flying shears, the finishing train, the roller hearth furnace, etc. A Verwalzer in the finishing mill z. B. by torn ligament between the last two Scaffolding thus quickly leads to a build-up of material between these scaffolds, which can only be remedied by later manual activities. This requires a few minutes of work with subsequent inspection and, if necessary, repair of the system 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 standstill takes too long, the steel solidifies in the mold and can only be removed very expensive or only with damage to the mold. An uncontrolled raising of the mold and the strand guide would usually lead to a strand breakthrough, so that the liquid steel pours over the aggregate and causes considerable damage. In particular, the strand guide rollers are sensitive to thermal overload during prolonged standstill.

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.

The EP 2 259 886 B1 proposes in this regard to introduce a cut in the band, to bend the band foot which protrudes in the conveying direction upwards and to chop the following band. However, this requires conceptually that the following strip material is still in motion. If the band is already completely at rest, the method can not be used, ie if the continuous process has already come to a standstill. Another solution reveals the DE 10 2007 058 709 A1 ,

A concept for a fault with already completely or almost completely stalled production material is not known. When come to a complete halt production material so far there is no way to dispose of the production material in a timely manner, for. B. on chopping on flying or moving scissors. The previous solutions are rather assume that the slab is still moving and thus on a pair of scissors by movement of the slab a chopping operation can be added. However, this is not possible with all types of trouble and especially problematic when the slab or the band has already completely come to rest after a production disruption.

In the light of the problem described above, the invention is based on the object of safely, quickly and economically resetting the production line after the occurrence of a disturbance, and preferably automatically returning it to a state which makes it possible to resume production. Particular attention is paid to removing the slab or solidifying steel as quickly as possible from the mold and further out of the casting machine in order to minimize damage and downtime. Finally, the material lying in the plant should be processed so that as far as possible further processing is possible.

1. a) Durchschneiden des Bandes an einer ersten Stelle;
2. b) Durchschneiden des Bandes an einer zweiten Stelle, wobei die zweite Stelle in Förderrichtung von der ersten Stelle zwischen 0,1 m und 5,0 m, vorzugsweise zwischen 0,2 und 1,0 m, entfernt liegt, wobei das Durchschneiden des Bandes an den beiden Stellen durch eine einzige Trenneinrichtung in Form einer Pendelschere oder einer beweglichen Torschere erfolgt;
3. c) Entfernen, insbesondere Herausfördern des ausgeschnittenen Bandabschnitts aus der Förderlinie zur Schaffung einer Lücke im Band;
4. d) Nachfördern von Bandmaterial aus dem der ersten Stelle in Förderrichtung vorgelagerten Bereich in den Bereich der Lücke;
5. e) Abschneiden von Abschnitten des gemäß Schritt d) nachgeförderten Bandmaterials und Entfernen, insbesondere Herausfördern, der Abschnitte aus der Förderlinie (Häckselbetrieb).

The solution of this problem by the invention is characterized in that the following steps are carried out in the event of a production disturbance and a completely or almost completely stopped production of the slab or strip:

1. a) cutting the tape at a first location;
2. b) cutting the tape at a second location, wherein the second location in the conveying direction from the first location between 0.1 m and 5.0 m, preferably between 0.2 and 1.0 m away, wherein the cutting of the tape in the two places by a single Separating device in the form of a pendulum scissors or a movable scissor takes place;
3. c) removing, in particular conveying out the cut-out band section from the conveyor line to create a gap in the band;
4. d) feeding conveyor belt material from the area upstream of the first location in the conveying direction into the area of the gap;
5. e) cutting off portions of the strip material post-conveyed according to step d) and removing, in particular conveying out, the sections from the conveyor line (chopping operation).

The said removal also includes, for example, the dropping of cut band sections into a receptacle provided for this purpose.

The chopping operation also allows outfeed of the casting strand from the casting machine.

The second position is preferably in the conveying direction before the first digit.

The first and second locations are preferably between the caster and the finishing mill. However, it is also advantageously possible for the first and second points to lie between a roughing mill immediately following the casting machine in the conveying direction and a furnace following the rough rolling mill in the conveying direction. The first and second location may be between a furnace downstream of the casting machine in the conveying direction and the finished rolling mill.

The concept can be used in all plant concepts with any combination of casting machine, roughing mill, furnace, intermediate rolling mill and finishing mill.

The abovementioned steps d) and e) are preferably repeated until the casting machine is freed from the strip material or in the casting machine a defined length section is free of strip material.

The abovementioned steps a) to c) can be carried out by means of a first separation device and steps d) and e) by means of a second separation device, the two separation devices being arranged at different locations in the conveying direction.

Furthermore, a special development of the method provides that strip material is conveyed from the finished rolling mill counter to the conveying direction into the region of at least one separating device and in the at least one separating device a cutting of portions of conveyed strip material and a conveying out of the sections from the conveying line (chopping operation) takes place ,

Adjacent to the at least one separating device, means for applying a straightening force to the strip material can be arranged with which a force can be exerted perpendicular to the surface of the strip material. Thus, the band foot can be addressed in the given case.

The gap can be made with two, but also with more than two cuts of the separator.

It can also be provided that, in the presence of a furnace in the plant, a gap is first cut into the strand as described, and then the strip material located in the furnace is shortened to the desired length with the at least one separating device, but otherwise remains in the furnace. This can be achieved that the shortened strip material is kept in the oven at a high temperature and then rolled in a simple manner after the elimination of the disturbance. The separator is in this case preferably in front of or behind the oven.

The apparatus for producing a metallic strip in the continuous casting-rolling process comprises a casting machine, at least one furnace, first and second separating means for the strip from which the strip is made, a finishing mill, a cooling section and at least two Reels, wherein a central fault signaling system is present, which is in communication with said plant components and can monitor their process state, wherein the first and / or the second separating device is formed, the tape or the slab, from which the tape is made to to be able to separate two adjacent in the conveying direction points, which is provided according to the invention that the fault annunciator is designed to activate the first and / or second separator as soon as a detection of abnormalities with respect to the mass flow of the system components over a predetermined tolerance frame is done that the first parting device is designed as pendulum scissors or movable scissors and that in the conveying direction behind the first and / or the second separating device at least one vertically movable roller is arranged.

The adjacent locations are preferably at least 200 mm apart in the conveying direction.

The furnace is preferably designed as a tunnel oven or other type of heating device. Furthermore, flying scissors may be present. The central fault message system (fault reporting system) covers all system parts. It receives error messages regarding mass flow disturbances of all system parts. In the event of a critical mass flow disturbance on a part of the plant, an alarm is triggered which causes all individual parts of the plant to control the mass flow in a controlled manner. In this case, there is preferably a direct connection to the first separating device, wherein a signal for immediate separation of the material is transmitted.

The first separating device arranged in the material flow behind the casting machine can separate the cast slab at two different points when it is at a standstill. In this case, the scrap removal system of this pair of scissors is preferably dimensioned such that the material present in the strand in the material flow upstream of the first separation device can be completely absorbed and the separator can divide a slab in Häckselbetrieb.

The time interval of the separations of the first separator is preferably at most 20 s.

The vertically movable roller arranged behind the first separating device is provided to provide an adjustable gap perpendicular to the transporting direction of the To form materials; By closing the gap towards the slab, a straightening process can be performed on the slab end.

The proposed reporting system has the advantage that a manageable system can be created for an operator. The entire system is generally operated with a constant mass flow. The central reporting system makes it possible to control the process in case of a malfunction on a partial unit and to stop it in the given case with a defined ramp.

For the first separation device is a direct line. Thus, in the given case, the material can be separated immediately, so that the casting machine can be made as quickly as possible.

The cut-out parts of the slab or strip are taken up in a container. Its size is adapted to the requirement that the casting machine must be emptied quickly, without having to change receptacle.

The cutting length is - as mentioned - at least 200 mm in order to remove as much material per time can, but at the same time need not unnecessarily enlarge the separator.

The separation time is the smallest possible within technically feasible limits and is preferably less than 20 s. So that the casting machine should be able to be emptied as quickly as possible.

The vertically adjustable rollers allow the further use of the slabs while avoiding damage to the downstream equipment (such as the oven). The knife shape is formed in the material, ie a roof knife shape is found in the slab again. This elevation is advantageously directed by means of the rollers from the slab.

Weiterbildungsgemäße is provided as that a central fault reporting system for the entire casting-rolling process is available and is used. Detection and reporting of a fault affecting the entire system takes place automatically or by a helmsman in the system. After detecting a fault affecting the entire system, the individual system components are purposefully stopped by the system automation. The sequence of the proposed or required measures for the removal of the strip material, in particular from the casting machine, preferably takes place automatically by the plant automation, at least in parts.

The invention thus provides a method for an emergency strategy in the processing of material in a continuous casting-rolling process, namely when a complete cessation of the movement of the cast and rolled metal strip has already taken place.

Advantageously, the proposed method is applicable to all cuttable strip dimensions, as occur, for example, directly behind the caster. It can be used commonly available cutting devices, which no additional space in the system is needed.

In the present case, it is therefore assumed that a fault occurs in full-continuous operation. The cast strand is present in different processing stages over the entire length in the rolling mill. By dividing the strand according to the invention and by removing the sections, the resulting strand sections can be moved again in the system, these strand sections can be further processed so that as much material as possible remains for further processing. The individual aggregates of the plant experience no significant damage and operation can be resumed as quickly as possible.

Training can be provided that the measures described at different points of the system - as seen in the conveying direction - done in parallel. Thus, a first separating device before the finishing train to separate the strand and create a gap. The chaffing can be done on a second separator and is only possible here through the gap section.

The strand is shortened in the Häckselverfahren - in an existing furnace - at the separator until the remaining slab undercuts the furnace length. It can then be placed in the oven for further processing, d. H. The remaining slab is placed in the oven to be rolled out after the reel stand is restored.

It is preferably provided that the slab end is directed by moving rollers in the region of the shears. The movable rollers may be arranged in front of and / or behind the separating device in order to properly align the slab head and / or the slab base.

The strip material can also be conveyed back out of the finishing train against the conveying direction (conventional material direction) and also cut in the separating device according to a process supplement.

However, this piece of material of the band can also be conveyed from the finishing train in the direction of the reel and there removed from the roller table, optionally connected with a manual cutting and crane operations.

It is advantageous to lower the first roller behind the separating device in order to support the first cut or the gap cut.

Furthermore, the use of a scrap transport belt on the separating device is advantageous in order to be able to remove separated scrap.

The separating devices are preferably designed as pendulum scissors or as movable gate scissors, which allow the cutting of a gap in a particularly simple manner.

Accordingly, it is advantageously possible to quickly restore the operational readiness after a failure in the endless operation. It can damage and thus downtime for the change of components can be avoided.

It is a quick outfeeding the strand from the casting machine possible. As a result, mold damage and a high thermal load on the strand guide rollers can be avoided.

When shredding the tape replenishment corresponds in the conveying direction between two separations of the separated tape length. When creating a gap, the tape length, which is nachgeschoben between two separations in the direction of tape travel, preferably shorter than the tape length, which is separated with two successive divisions. The limit case with a maximum gap is that of the stationary band. For this it is necessary that the separations can take place at different locations.

Fig. 1

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

Fig. 2

einen Abschnitt des Bandes mit einer Trenneinrichtung in Form einer Pendelschere während eines ersten Teilschritts des vorgeschlagenen Verfahrens,

Fig. 3

den Abschnitt des Bandes mit der Trenneinrichtung während eines zweiten Teilschritts des vorgeschlagenen Verfahrens,

Fig. 4

den Abschnitt des Bandes mit der Trenneinrichtung während eines dritten Teilschritts des vorgeschlagenen Verfahrens,

Fig. 5

den Abschnitt des Bandes mit der Trenneinrichtung während eines vierten Teilschritts des vorgeschlagenen Verfahrens,

Fig. 6

den Abschnitt des Bandes mit der Trenneinrichtung während eines fünften Teilschritts des vorgeschlagenen Verfahrens,

Fig. 7

den Abschnitt des Bandes mit der Trenneinrichtung während eines sechsten Teilschritts des vorgeschlagenen Verfahrens,

Fig. 8

den Abschnitt des Bandes mit der Trenneinrichtung während eines siebten Teilschritts des vorgeschlagenen Verfahrens,

Fig. 9

den Abschnitt des Bandes mit der Trenneinrichtung während eines achten Teilschritts des vorgeschlagenen Verfahrens,

Fig. 10

den Abschnitt des Bandes mit der Trenneinrichtung während eines neunten Teilschritts des vorgeschlagenen Verfahrens und

Fig. 11

den Abschnitt des Bandes mit der Trenneinrichtung während eines zehnten Teilschritts des vorgeschlagenen Verfahrens.

In the drawing, an embodiment of the invention is shown. Show it:

Fig. 1

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

Fig. 2

a section of the belt with a separating device in the form of a pendulum scissors during a first substep of the proposed method,

Fig. 3

the section of the strip with the separator during a second step of the proposed method;

Fig. 4

the section of the strip with the separator during a third step of the proposed method;

Fig. 5

the section of the strip with the separator during a fourth substep of the proposed method;

Fig. 6

the section of the belt with the separator during a fifth substep of the proposed process,

Fig. 7

the section of the strip with the separator during a sixth step of the proposed method;

Fig. 8

the section of the strip with the separator during a seventh step of the proposed method;

Fig. 9

the section of the strip with the separator during an eighth step of the proposed method;

Fig. 10

the section of the belt with the separator during a ninth substep of the proposed method and

Fig. 11

the portion of the belt with the separator during a tenth substep of the proposed method.

In Fig. 1 an example of a casting-rolling plant is sketched, which is designed as Voll-Konti-plant and which includes a casting machine 2 and a finish rolling mill 3 as central elements. Behind the casting machine 2, a roughing mill 7 is provided, to which - depending on the system concept - a furnace 8 (Verbindungsrollgang with heating function). Behind the furnace 8 is the finished rolling mill 3. Behind the finish rolling mill 3 is a cooling section 12 and a flying shears 13. In the conveying direction F, then at least one reel 14 and 15 connects.

Between the roughing mill 7 and the furnace 8, a first separator 9 for the band 1 is arranged in the form of a pendulum scissors. A second separator 10 of the same kind is located between the oven 8 and the finishing mill 3.

Of course, the proposed method can also be used in a deviating plant concept of a casting-rolling plant.

The complete system is monitored via a central fault reporting system 16 by means of sensors which are not shown.

For continuous rolling, the system is complete with one strand, i. H. with a continuous volume 1, occupied. In case of failure, the strand or the tape comes to a halt. Due to the length of the system, the operator does not have an overview of the entire system. A fault is triggered only in one part of the plant and usually triggers an immediate stop of this part of the plant. This leads to uncontrolled material jams or material pull in the other parts of the system if a controlled stop with a suitable deceleration rate is not triggered there. This can cause damage to system components. In addition, a jam may form until its elimination no production operation is possible.

Due to the coupling of all plant parts, a movement of the complete strand or strip 1 is impossible with a material stop. According to the invention, a gap is selectively generated so that movements of the slab become possible again. Next, the casting machine 2 must be released from the material as quickly as possible not to "freeze". Furthermore, the material which is still in the plant and which can still be used should possibly be able to be fed to a subsequent further processing.

The solution according to the invention is based on the following units in the system:
It is - as described - essentially provided a system equipment, as in Fig. 1 is shown. A typical element of such a full-continuous continuous casting plant is the central fault reporting system 16 and the separating devices 9, 10 and 13.

In the higher-level central fault reporting system 16 there is a collection of fault messages, so that targeted initiation of the necessary measures in a specific accident is possible.

The separating device 9 lying in the conveying direction F is designed, for example, as a pendulum scissors or movable scissors. The separator 9 has the property to be able to perform several separations in stationary and / or moving material at different positions in the conveying direction within the separator in a short time. The separator also includes a scrap removal system 17 (see eg. Fig. 2 ).

Advantageous in a further separating device 10, which is arranged behind the furnace 8 and before the finished rolling mill 3; This separating device 10 is thus arranged downstream of the separating device 9 in the production line, but can be embodied in exactly the same way as the separating device 9, including the scrap removal system 17.

Furthermore, 2 facilities are provided in the casting machine, which allow a brief stoppage of the casting process and allow for a defined maximum time further transport of the cast strand.

The planned central fault message and fault reaction system 16 advantageously includes the entire system. If, for example, a material flow disturbance occurs in the finishing mill 3 or if it becomes recognizable, a signal must be transmitted directly to all units and controls in the plant, so that the individual aggregates and drives are stopped in a controlled manner at the same time.

After the signal "disturbance" has occurred, the casting machine 2 is stopped in a controlled manner, that is, no liquid steel may enter the mold and the machine must come to a standstill.

The detection of a fault is carried out either by the system automation via suitable sensors (speedometer, tape tension detection, looper, etc.) or by the operating personnel in a plant area.

The proposed method and the necessary equipment of the plant will provide to allow the separation of a standing or almost stationary strand of material (conveying speed of less than 1 m / min) in a short time and thus to allow emptying of the casting machine 2.

The specific sequence of the method is exemplary in the FIGS. 2 to 11 shown. The essential idea here is the creation of a possibility to cut a gap in the standing material or band 1. Through this, the tape transport is made possible again, so that the strip material can be removed from the plant in Häckselbetrieb.

In Fig. 2 is a separator 9, 10 outlined, which may be, for example, the second separator 10. The separator is designed as pendulum scissors.

The scissors support 18 of the pendulum scissors 10 is initially as in Fig. 2 represented (around the axis, which in Fig. 2 perpendicular to the plane) is pivoted, so that the scissors elements 19 and 20 are located at a first point 4 of the system. The belt 1 is here completely at rest, ie the conveying speed in the conveying direction is practically zero.

In Fig. 3 It can be seen how the scissor elements 19, 20 are driven towards each other to cut through the band 1 at the first location 5. The scissor elements 19, 20 are - according to Fig. 4 moved apart again; the band 1 is now divided in the first place 4.

Now - as in Fig. 5 can be seen - the scissors support 18 is pivoted so that the scissors elements 19, 20 come to rest at a second point 5 of the system. Here is now - according to Fig. 6 - Performed a further cut and thus a band portion 21 cut out of the band 1. The first and the second place 5, 4 are usually between 0.2 m and 1.5 m apart.

This band part 21 falls as in Fig. 7 down to the area of a scrap removal system 17 (shown only very schematically). In band 1, a gap 6 remains.

In the created gap 6 can now retract the band 1 from the left, while the band 1 remains right at rest. This is in Fig. 8 illustrated. The retraction of the tape in the gap is carried out by the casting machine 2 at creep speed and is the start of the chopping process, with which the coming from the left band 1 is cut into band parts 21 and disposed of in the region of the casting machine 2.

As in Fig. 9 can be seen, another band portion 21 is cut out after sufficient tape has come from the left into the area of the gap 6. After cutting off the band part 21 is - as in Fig. 10 see again - the gap 6 available to continue to chop band material.

The chopping process is continued until the strip or slab coming from the casting machine 2 is cut into strip parts 21 and disposed of via the scrap removal system 17. In this way, the casting machine 2 is freed from the strip material 1 or the residual strand is disposed of as far as desired.

In Fig. 11 can still be seen how the band foot of the still resting band 1 can be addressed in the right area of the figure. For this purpose, means 11 for applying a straightening force are present, so that the band foot can be straightened. Central part of the means 11 are vertically movable rollers that can press against the belt surface.

Depending on the design of the casting plant then the casting process can be continued.

The separating devices 9 and 10 can be used alternatively or additionally as described.

As a combined method variant, it is also possible to the extent that a gap 6 is cut by the separator 10 and is subsequently disposed of at the separator 9 of the residual strand from the casting machine 2 in Häckselbetrieb in the scrap removal.

LIST OF REFERENCE NUMBERS

1

tape

2

casting machine

3

Finish-rolling mill

4

first place

5

second place

6

gap

7

roughing mill

8th

oven

9

first separating device (pendulum scissors / scissors)

10

second separating device (pendulum scissors / scissors)

11

Means for applying a straightening force

12

cooling section

13

flying scissors

14

reel

15

reel

16

annunciator

17

Scrap discharge system / scrap receptacle

18

scissors carrier

19

scissors element

20

scissors element

21

band part

F

conveying direction

Claims (12)

1. Method of producing a metallic strip (1) in a continuous casting and rolling process, in which initially a slab is cast in a casting machine (2) and fed to a finishing rolling mill (3), which is downstream of the strip in conveying direction (F), and rolled therein, characterised in that
   in the case of disruption to production and coming to a complete or almost complete stopping of conveying of the slab or strip (1), the following steps are undertaken:

   a) cutting through the strip (1) at a first location (4);

   b) cutting through the strip (1) at a second location (5), wherein the second location (5)
   lies at a distance in conveying direction (F) from the first location (5) of 0.1 metres and 5.0 metres, wherein the cutting through of the strip (1) at the two locations (4, 5) is carried by a single separating device (9) in the form of pendulating shears or movable gate shears;

   c) removing, in particular conveying out, the cut-out strip section from the conveying line in order to create a gap (6) in the strip (1);

   d) subsequent conveying of strip material from the region, which is upstream of the first location (4) in conveying direction (F), into the region of the gap (6); and

   e) cutting off sections of the strip material, which is subsequently conveyed in accordance with step d), and removing, particularly conveying out, the sections from the conveying line.
2. Method according to claim 1, characterised in that the second location (5) lies in front of the first location (4) in conveying direction (F).
3. Method according to claim 1 or 2, characterised in that the first and second locations (4, 5) lie between the casting machine (2) and the finishing rolling mill (3).
4. Method according to claim 3, characterised in the first and second locations (4, 5) lie between a roughing mill (7), which is arranged directly downstream of the casting machine (2) in conveying direction (F), and a furnace (8), which is downstream of the roughing mill (7) in conveying direction.
5. Method according to claim 3, characterised in that the first and second locations (4, 5) lie between a furnace (8), which is downstream of the casting machine (2) in conveying direction (F), and the finishing rolling mill (3).
6. Method according to any one of claims 1 to 5, characterised in that the steps d) and e) of claim 1 are repeated until the casting machine (2) is free of strip material or a defined length section in the casting machine (2) is free of strip material.
7. Method according to any one of claims 1 to 6, characterised in that steps a) to c) of claim 1 are carried out by means of a first separating device (9) and steps d) and e) of claim 1 are carried out by means of a second separating device (10), wherein the two separating devices (9, 10) as seen in conveying direction (F) are arranged at different places.
8. Method according to any one of claims 1 to 7, characterised in that strip material from the finishing rolling mill (3) is conveyed oppositely to the conveying direction (F) into the region of at least one separating device (9, 10) and cutting-off of sections of conveyed strip material and conveying of the sections out of the conveying line are carried out in the at least one separating device (9, 10).
9. Method according to any one of claims 1 to 8, characterised in that means (11) for application of a straightening force to the strip material, by which a force can be exerted perpendicularly to the surface of the strip material, are arranged adjacent to the at least one separating device (9, 10).
10. Method according to any one of claims 1 to 9, characterised in that the gap (6) is produced by more than two cuts of the separating device (9).
11. Device for producing a metallic strip (1) in a continuous casting and rolling method, comprising a casting machine (2), at least one furnace (8), a first and a second separating device (9, 10) for the strip (1) or for the slab from which the strip (1) is produced, a finishing rolling mill (3), a cooling path (12), cantilever shears (13) and coiling devices (14, 15),
    wherein a central disruption reporting system (16) is connected with the said plant components (2, 8, 9, 10, 3, 12, 13, 14, 15) and can monitor the process state thereof, and wherein the first and/or the second separating device (9, 10) is or are constructed to be able to separate the strip (1) or the slab, from which the strip (1) is produced, at two locations adjacent in conveying direction (F).
    characterised in that
    the disruption reporting system (16) is constructed to activate the first and/or second separating device (9, 10) as soon as detection of abnormalities with respect to the mass flow at the plant components (2, 8, 9, 10, 3, 12, 14, 15) beyond a predetermined scope of tolerance has taken place,
    the first separating device (9) is constructed as pendulating shears or movable gate shears and
    at least one vertically movable roller is arranged behind the first and/or second separating device (9, 10) in conveying direction (F).
12. Device according to claim 11, characterised in that the adjacent locations are spaced by at least 200 millimetres in conveying direction (F).

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