AT523062A4 - Production plant and method for operating such a production plant - Google Patents

Abstract

The invention relates to a production plant and a method for operating such a production plant, wherein a continuous casting plant (55) of a first production line casts a first slab (110) from the metallic melt (105), the first slab (110) from the continuous casting plant (55 ) is fed to a roughing train (60) of the first production line (15) and the roughing train (60) rolls a first roughing strip (116) from the first slab (110), the first roughing strip (116) being fed to the finishing rolling train (80) and the finishing train (80) rolls the first pre-strip into the first finished strip (145), a second slab (130) being fed to a slab heater (95) of the second production line (25) and the slab heater (95) on the second slab (130) heated a roughing temperature, wherein a slab rolling train (100) of the second production line (25) rolls the second slab (130) to the second preliminary strip (155), wherein a transport device (20) the second preliminary strip (155) vo n the second production line (25) is transported to the first production line (15) and the finishing rolling train (80) is supplied with the second preliminary strip (155) instead of the first preliminary strip (116), the finishing rolling train (80) adding the second preliminary strip (155) the second finished strip (170) rolls.

Description

15th

20th

25th

30th

35

201900302

description

Production plant and process for operating such a pro-

production plant

The invention relates to a production plant according to claim 1 and a method for operating such a plant

Production plant according to claim 9.

A production plant with two continuous casting plants is known from EP 1 657 004 A1, one of the two continuous casting plants in line with a finishing mill of the production plant

is aligned.

It is the object of the invention to provide an improved production plant and an improved method for operating such a pro-

production plant to provide.

This object is achieved by means of a production plant according to patent claim 1 and by means of a method according to patent claim 9. Advantageous embodiments are in the dependent

Claims stated.

It was recognized that an improved production system can be provided in that the production system has a first production line, a second production line and a transport device. The first production line has a continuous caster, a roughing mill and a finishing mill. The second production line has a slab rolling train. The transport device is formed between the first production line and the second production line. The continuous caster is designed to cast a first slab from a metallic melt. The first slab is preferably cast in what is known as an endless continuous casting (also ESP - Endless Strip Production). The roughing train is arranged downstream of the continuous caster in relation to a first conveying direction of the first slab. Preferably the

Pre-rolling train directly following the continuous caster. The

15th

20th

25th

30th

35

201900302

The first slab can be fed to the roughing train and the roughing train is designed to roll the first slab into a first roughing strip. The finishing train is downstream of the roughing train in relation to the first conveying direction of the first slab in the roughing train and the first roughing strip can be fed from the roughing train into the finishing train. The second production line has a slab heater, and a second slab can be fed to the slab heater. The slab rolling train is arranged downstream of the slab heating in relation to a second conveying direction of the second slab. The slab heater is designed to heat the second slab to a predefined roughing temperature. The slab rolling train is designed to roll the second slab into a second slab. The transport device is designed to transport the second sliver from the slab rolling train to the first production line and to feed the second sliver to the first production line. The finishing train is designed, the first pre-strip to a first finished strip or the second pre-strip

to roll into a second finished strip.

This refinement has the advantage that, by expanding the production plant with the second production line, the finishing rolling train of the first production line can be operated even when the continuous casting plant is at a standstill, thereby ensuring high capacity utilization of the production plant. Furthermore, the production capacity of the production plant for the production of finished strip can be increased without the need to install an additional continuous caster and, if necessary, if an existing converter cannot produce sufficient liquid metal melt, a further continuous caster and a further converter have to be installed in order to achieve full capacity utilization the finishing mill to increase. Furthermore, the installation space required to expand the production plant is significantly reduced. In particular, the slab rolling mill can be equipped with a reversing roll stand, so that the

Slab rolling train is particularly simple.

15th

20th

25th

30th

35

201900302

It is particularly advantageous if the production plant has a slab store for storing at least one second slab, preferably several second slabs, and a slab conveying device. The slab store is designed to store the second slab at a temperature of -30 ° C. to + 60 ° C. for at least a period of 12, preferably at least 24 hours. The slab conveying device is formed at least in sections between the second production line and the slab store. The slab conveying device is designed to transport the second slab from the slab store to the second production line and to supply it to the second production line. This configuration has the advantage that numerous second slabs can be stored in the second slab store and, due to the long storage time, assume the ambient temperature of the second slab store there. As a result, the second finished strip can be produced with the production system even in the event of a short-term failure, for example in the event of a malfunction in the continuous caster and / or the roughing mill and / or the converter. It is particularly advantageous here if the first slab has a first material, for example a first alloy composition. The second slab can comprise a second material with a second alloy composition. The first material can be different from the second material. For example, the second material can be a special alloy that cannot be produced in the installed steelworks and the first material one that can be produced in the connected steelworks

Be standard alloy.

In a further embodiment, the second production line has at least one winding device, the winding device being designed to wind the second pre-strip into a coil. The transport device is designed to transport the coil with the wound up second pre-strip to the first production line, with an unwinder being arranged between the roughing train and the finishing train, which is designed to unwind the coil. The second

The pre-strip is unwound and can be fed to the finishing train. Is this

15th

20th

25th

30th

35

201900302

Second pre-strip wound as a coil, it can be transported particularly well when it is hot. Furthermore, there is little heat loss from the wound coil. The coil can also be thermally insulated with the second pre-strip so that there is little heat loss from the coil during transport from the second production line to the first production line. By hot rolling the second slab to form the second pre-strip, the second

The opening strip can be wound particularly well to the coil.

In a further embodiment, the production plant has a first building, the first production line, the second production line and the transport device being arranged in the first building. The slab store can be arranged outside the first building. The slab store can be enclosed to protect the second slab. This configuration has the advantage that the first building can be kept particularly small and does not have to additionally accommodate the slab store. In an alternative embodiment of the production plant, the production plant has a first building and a second building arranged spatially adjacent to the first building, the first production line being arranged in the first building and the second production line being arranged in the second building. The transport device is arranged at least in sections between the first building and the second building. The transport device is designed to transport the second sliver from the second production line arranged in the second building to the first production line arranged in the first building. This embodiment has the advantage that the first building and the second building in total can have a reduced enclosed volume compared to the first embodiment if the first production line and the second production line are arranged together in the first building. In the alternative embodiment, too, it is advantageous if the slab store is arranged outside the first and the second building. If the slab store is to be enclosed, for example due to environmental influences, for example due to sand drift, so

it makes sense to move the slab store in the second building

15th

20th

25th

30th

35

201900302

bring up. It is advantageous here if the distance between the two buildings is less than 150 m, in particular less than 100 m,

is in particular less than 50 m and at least greater than 10 m.

In a further embodiment, the transport device has a crane and a crane runway, the crane runway being formed at least in sections between the second production line and the first production line. The crane is arranged to be movable on the crane runway. The crane is designed to transport the second pre-strip from the second production line to the first production line, at least in sections. This embodiment has the advantage that no specific means have to be provided in order to transport the pre-strip between the two production lines. The second pre-strip can also be raised by means of the crane, for example during maintenance of the first and / or second production line

and be transported.

In a further embodiment, the slab conveying device has a roller conveyor, the roller conveyor being arranged in front of the slab heating in relation to the second conveying direction of the second slab. The roller conveyor is designed to transport the slab at least in sections between the slab store and the slab heater. This configuration has the advantage that several second slabs can also be transported with the roller conveyor at the same time. The transport can take place sequentially, so that a high cycle rate is possible for the second production line and a replenishment of

second slab is not interrupted.

In a further embodiment, the continuous caster is designed as an endless continuous caster, with the first sliver on

a first side with the first slab and the first sliver on a second side opposite to the first side

connected to the first finished tape.

In a further embodiment is between the roughing train

and an intermediate heater is arranged on the finishing rolling train, wherein

15th

20th

25th

30th

35

201900302

the intermediate heater is designed to heat the first pre-strip to a predefined first finishing-rolling temperature, the second pre-strip being fed to the finishing-rolling train between the intermediate heating and the roughing-rolling train. When the second pre-strip is supplied, the intermediate heater is designed to heat the second pre-strip to a predefined second finishing rolling temperature, the first predefined finishing rolling temperature being different or identical to the first predefined finishing

rolling temperature is.

The production plant described above can be operated particularly well in that the continuous casting plant casts the first slab from the metallic melt, the first slab being fed from the continuous casting plant to the roughing mill. The roughing mill rolls the first slab from the first slab. The first sliver is fed to the finishing train. The finishing train rolls the first pre-strip into the first finished strip. The second slab is fed to the slab heater and the slab heater heats the second slab to the roughing temperature. The slab rolling train rolls the second slab into the second sliver. The transport device transports the second sliver from the second production line to the first production line. The second pre-strip instead of the first pre-strip is fed to the finishing train, with the finishing train

rolls the second pre-strip into the second finished strip.

This refinement has the advantage that even if the continuous caster with the finishing rolling train malfunctions, the second preliminary strip can be rolled into the second finished strip and the first production line does not come to a complete standstill. It is also advisable that the first slab and the second slab each have different materials, so that the second finished strip is rolled with the second material during the failure of the continuous caster. In this way, two different finished strips with different

Materials can be produced inexpensively.

15th

20th

25th

30th

35

201900302

In a further embodiment, the second pre-strip is wound into a coil, the coil being transported from the second production line to the first production line. The coil is unwound and the second sliver becomes the

Finishing mill fed unwound.

In a further embodiment, the second slab is fed to the slab heater at a temperature of -30 ° C. to + 60 ° C., the slab heater being applied to the second slab

Pre-rolling temperature, preferably from 1100 ° C to 1200 ° C, heated. In a further embodiment, the second slab with a completely solidified metallic structure of the slab

heating supplied.

The invention is explained in more detail below with the aid of figures

purifies. Show:

1 shows a schematic representation of a production plant

according to a first embodiment;

2 shows a first production line shown in FIG

Production facility.

3 shows a second production line of the one shown in FIG

Production plant;

4 shows a flow chart of a method for operating the in

the production plant shown in Figures 1 to 3; and

5 shows a schematic representation of a production plant

according to a second embodiment.

1 shows a schematic representation of a production

plant 10 according to a first embodiment.

15th

20th

25th

30th

35

201900302

The production plant 10 has a first production line 15, a transport device 20, a second production line 25,

a finished store 30 and a slab store 35.

The production plant 10 is located on a site 40 of a manufacturing company. At least one first building 45, preferably a production hall, is located on the site 40, with at least the first production line 15 and the second production line 25 being housed in the first building 45. In addition, the prefabricated warehouse 30 can also be located in the building 45

are located.

The transport device 20 is formed in the first building 45 at least between the first production line 15 and the second production line 20. The transport device 20 can, for example, have a first crane 21 and a first crane runway 22. The first crane 21 can be designed as a gantry crane in the first building 45. The first crane 21 can be moved along the first crane runway 22. The first crane runway 22 is formed by two traverse paths of the first crane 21 that are offset by 90 °. The first crane runway 22 runs between the first production line 15 and the second production line 25. The transport device 20 could also have a coil transporter, which is designed, for example, as a rail vehicle. The transport device 20 could also have a first

Have roller conveyor.

In the embodiment, the second production line 25 can be arranged offset and at a distance from the first production line 15 in the building 45. A minimum distance a from the first production line 15 to the second production line is less than or equal to 150 m, preferably less than or equal to 100 m, in particular less than or equal to 50 m, in particular less than or equal to 30 m the first production line is 15

at least 10 m.

15th

20th

25th

30th

35

201900302

The slab store 35 is located on the site 40 and can be arranged as an external store, for example outside the first building 45, for example spatially next to the first building 45. The slab store 35 can also be accommodated in the building 45 in which the first and second production lines 15, 25 are located. The slab store 35 can also be accommodated in a further building, not shown in FIG

be.

Furthermore, the production plant 10 can have a slab conveying device 50, the slab conveying device 50 being formed between the slab store 35 and the second production line 25. The slab conveyor device 50 can have, for example, a second crane 51, in particular a gantry crane, and a second crane runway 53. The second crane 51 can be moved along the second crane runway 53. Furthermore, the slab conveyor device 50 can have a second roller conveyor 52 (according to BZL first roller conveyor 52, please check first and second roller conveyor and BZ with search / replace in the entire document, is not specially marked), the second roller conveyor 52, for example, between the slab store 35 and The second

Production line 25 is formed.

The first production line 15 has, for example, a continuous caster 55, a roughing train 60, a first separating device 65, an unwinder 66, a second separating device 70, an intermediate heater 75, a descaler 76, a finishing rolling train 80, a cooling device 85, a third separating device 90 and a first winding device 125

on.

The second production line 25 has at least one slab heater 95 and one slab rolling train 100. In addition, the second production line 25 can have a cleaning device 106 and / or a second coil 160 and / or a fourth separation unit

direction 161.

15th

20th

25th

30th

35

201900302 10

FIG. 2 shows the first production line 15 of the one shown in FIG

Production plant 10.

The continuous caster 55 is designed, for example, as a curved continuous caster. Another embodiment of the continuous casting installation 55 is also possible. During operation of the first production line 15, the continuous casting installation 55 is filled with a metallic melt 105 by means of a pan 144. The metallic melt 105 can for example by means of a converter, for example an electric arc furnace, or in a

Linz-Donawitz process.

The metallic melt 105 can have steel, for example in a first composition, as the first material. The temperatures specified below each relate to the fact that the production plant 10 is charged with steel as the first material and / or the second material. The metallic melt 105 can also predominantly comprise a non-ferrous material. In the continuous caster 55, the metallic melt 105 is at least partially solidified to form a first slab 110. The first slab 110 can be cast in the continuous caster 55, for example in the thin slab format or in the medium slab format. The continuous caster 55 is preferably formed, the first slab 110 in the

Continuous continuous casting to be poured.

In a first conveying direction of the first slab 110, the pre-rolling train 60 is arranged downstream of the continuous caster 55 and in the embodiment directly follows the continuous caster 55. The pre-rolling train 60 can have one or more pre-rolling stands 115, which are arranged one behind the other in the first conveying direction of the first slab 110. The number of roughing stands 115 is essentially freely selectable and essentially dependent

of a format of the first slab 110. The roughing train 60 is formed, which when fed into the

Pre-rolling train 60 hot first slab 110, with the hot first

Slab 110, for example, has a temperature of 1100 ° C to 1200 ° C

15th

20th

25th

30th

35

201900302 11

has to roll to a first sliver 116 in one pass through the roughing train 60. The first sliver 116 preferably has a thickness of 15 to 45 mm when it leaves the roughing train 60. The first sliver 116 leaves the roughing train 60 in the first conveying direction of the first slab 110 on one side

Continuous caster 55 facing away from the rough rolling train 60.

The first and second separating devices 65, 70 are arranged downstream of the roughing train 60, based on the first conveying direction of the first preliminary strip 116 or the first slab 110 rolled to form the first preliminary strip 116. The first separating device 65 can be arranged directly downstream of the roughing train 60, whereas the second separating device 70 is arranged at a distance from the first separating device 65 and the roughing train 60, based on the first conveying direction of the first roughing strip 116. The first and / or second separating device 65, 70 can also be dispensed with. The first and / or second separating device 65, 70 can be designed, for example, as drum shears or crank shears. After the first cutting device 65, the first sliver 116 can be removed from the first production line 15, for example if a malfunction occurs in the finishing train 80. The unwinder 66 is between the first separator

direction 65 and the second separating device 70 arranged.

The intermediate heater 75 can be arranged between the second separating device 70 and the finishing rolling train 80. The intermediate heater 75 can be designed, for example, as an induction furnace. Another embodiment of the intermediate heater 75 would also be conceivable. The intermediate heater 75 is arranged upstream of the finishing rolling train 80 and the descaler 76 in relation to the first conveying direction of the first pre-strip 116. The descaler 76 is arranged directly upstream of the finishing train 80 and the

Intermediate heating 75 directly downstream.

The finishing mill train 80 can have one or more finishing stands 120. In the embodiment, five finishing stands 120 are provided, for example, which are related one behind the other

on the conveyor of the first sliver 116 arranged

15th

20th

25th

30th

35

201900302 12

are. In relation to the first conveying direction of the first pre-strip 116, the finishing rolling train 80 is followed by the cooling device 85. The third separating device 90 is arranged on a side of the cooling device 85 facing away from the finishing rolling train 80. The first winding device 125 of the first production line 15 can be arranged downstream of the third separating device 90. The third separating device 90 can, for example, as

Drum shears or crank shears can be designed.

FIG. 3 shows the second production line 25 of the one shown in FIG

Production plant 10.

The second production line 25 does not have a continuous caster 55. As a result, the second production line 25 can be kept particularly short and has, for example, a maximum

Overall length less than 100 m.

At the entrance to the second production line 25, for example, the second roller conveyor 52 ends. A second slab 130 can be removed from the slab store by means of the second roller conveyor 52

35 of the second production line 25 are fed.

If the cleaning device 106 is provided, the second roller conveyor 52 ends at the cleaning device 106. The slab heater 95 is arranged between the slab rolling train 100 and the cleaning device 106 and thus the slab rolling train with respect to a second conveying direction of the second slab 130

100 upstream.

The slab heater 95 can be designed, for example, as a gas-operated heating furnace. The slab heater 95 can also be designed differently. The slab heater 95 is used to heat the second slab 130 from an ambient temperature to a predefined roughing temperature. The roughing temperature for steel as the second material can be 1100 ° C to 1200 ° C

be.

15th

20th

25th

30th

35

201900302 13

In the figures, for example, the first production line 15 and the second production line 25 are aligned parallel to one another with respect to the first conveying direction of the first pre-strip 116 and the second conveying direction of the second pre-strip 155. The second production line 25 can also be connected to the first

onslinie 15 inclined, preferably arranged vertically.

The slab rolling mill 100 has a slab rolling stand. The slab rolling mill 100 can also have several slab rolling stands 135

have, which can be arranged one behind the other.

The second winding device 140 is arranged downstream of the slab rolling train 100 in relation to the second conveying direction of the second slab 130. In addition, the fourth separating device 161 can be arranged between the second winding device 140 and the slab rolling train, which, for example, can be used as a

Drum shears or designed as crank shears.

FIG. 4 shows a flow chart of a method for operating the

Production plant 10 shown in FIGS. 1 to 3.

The production plant 10 can be operated in two operating states 200, 201. In a first operating state 201, in a first method step 205, the continuous casting plant 55 is filled with the metallic melt 105 and the metallic melt

Melt 105 is solidified in the continuous caster 55 to form the first slab 110. The first slab 110 preferably has a thickness of 100 to 600 mm at the end of the continuous caster 55, with the

the first slab 110 is fed directly to the roughing train 60.

In a second method step 210, in the roughing train 60 of the first production line 15, the first slab 110 is hot-rolled through the roughing stands 115 to form the first roughing strip 116. When leaving the roughing train 60, the first sliver 116 can be a

Have a thickness of 15 to 45 mm.

The first sliver 116 is through the first and second

Separating device 65, 70 out. The first separator 65

15th

20th

25th

30th

35

201900302 14

serves to separate the material rolled to the first pre-strip 116 into strips in a third process step 215, for example when the finishing rolling train 80 is at a standstill, which, for example, are wound up and stored in order to ensure continuous operation of the continuous caster 55 and the pre-rolling train 60 with simultaneous Standstill of

Ensure finishing mill 80.

In the first operating state 201 of the first production line 15, however, the first sliver 116 passes the first and second separating devices 65, 70 and is fed continuously through the intermediate heater 75 in a fourth method step 220. In a fifth method step 225, the intermediate heater 75 heats the first pre-strip 116 from a temperature of approximately 900 ° C., if the metallic melt 105 essentially comprises steel, to a predefined final rolling temperature of, for example, 1100 ° C. to 1200 ° C.,

In the descaler 76 connected downstream of the intermediate heater 75, scale can be removed, in particular, from a surface of the first pre-strip 116 in a sixth method step 230

washed off.

The finishing rolling train 80 rolls the first pre-strip 116 in a seventh method step 235 in a hot forming process from a thickness of, for example, 15 to 45 mm to a first finished strip 145, which, for example, has a thickness of 0.5 to 12.5 mm

Having left the finishing train 80.

In an eighth method step 240, after leaving the finishing rolling train 80, the first finished strip 145 is passed through the cooling

L device 85 out, wherein the cooling device 85 cools the first finished strip 145 from a temperature of 800 to 950 ° C to a temperature of more than 170 ° C with a cooling rate of more than 10 K / s. The first finished strip is with the first pre-strip 116 and

connected to the first slab 110.

15th

20th

25th

30th

35

201900302 15

At the end of the first production line 15, the first winding device 125 winds the first finished strip 145 in a ninth method step 245 into a first coil 150. The winding to form the first coil 150 can take place on a first reel or a first mandrel. A mandrel-free winding is also conceivable.

When the first coil 150 has been completely wound, the third separating device 90 separates the wound first finished strip 145 from the first finished strip 145 running through the cooling device 85 in a tenth method step 250. The first finished strip 145 can be transported as the first coil 150 by means of the transport device 20 into the finished storage 30 and

there to be further cooled to ambient temperature.

In parallel with the first to tenth method steps 205 to 250, a multiplicity of second slabs 130 are stored in the slab store 35. The second slabs 130 can have a thickness of 100 to 600 mm. The second slabs 130 are preferably cast in the thin slab format or in the medium slab format. The second slabs 130 can, for example, have been cast on a further continuous caster (not shown). It is particularly advantageous if the second slabs 130 are purchased, for example, and have been produced by means of a further continuous caster that is located outside the site 40.

The second slabs 130 have the second material, it being possible for the second material to be different from the first material of the first slab 110. The second material of the second slab 130 can also be essentially identical to the material of the first slab 110. It is particularly advantageous if the second material has essentially the same alloy composition as the first material. The second material can be a special alloy and the first

Material is a standard alloy.

15th

20th

25th

30th

35

201900302 16

In the slab store 35 (see FIG. 1), the second slabs 130 are stored at the ambient temperature. The slab store 35 can be open to the environment or designed as a separate building. Depending on the global setup of the production plant 10, the second slabs 130 have a temperature of -30 ° C to + 60 ° C. The second slabs 130 are, for example, at least 12 hours, preferably at least 24 hours, in the slab store 35 and take the ambient temperature,

which prevails in the slab store 35.

The production system 10 is preferably used to switch from the first operating state 201 to the second operating state 202

operated temporarily in both operating states 201, 202.

In the second operating state 202, in an eleventh method step 255, which can be carried out at the same time as the first to tenth method steps 205 to 250, the slab conveying device 50 transports the second slab 130 to the slab heater 95 Lift it out of the slab store 35 and transport it to the second roller conveyor 52. The second crane 51 can place the second slab 130 on the second roller conveyor 52, the second roller conveyor 52 transferring the second slab 130 to the slab heater 95 or, if provided, to the cleaning unit.

direction 106 promotes.

In a twelfth method step 260, which can also take place before the eleventh method step, the slab heater 95 is preheated to a predefined operating temperature. The twelfth method step 260 can also

be waived.

In a thirteenth method step 265 following the twelfth method step 260, the second slab 130 in the cleaning device 106 is cleaned of dirt such as dust and / or sand, for example by a washing process. Excess cleaning fluid

can for example be blown off in the cleaning device 106

15th

20th

25th

30th

35

201900302 17

become. For example, the second slab 130 can also be cleaned by means of compressed air in order to remove deposits of, for example, sand and / or dust. On the thirteenth

Step 265 can also be dispensed with.

In a fourteenth method step 270 following the thirteenth method step 265, the possibly cleaned second slab 130 is fed to the slab heater 95. It is particularly advantageous if the twelfth and / or thirteenth method step 260, 265 is started when it becomes apparent that the continuous caster 55 will be put out of operation and production of the first slab 110 or the first pre-strip 116 will be interrupted. This can take place, for example, when the converter and / or the continuous caster 55 and / or the roughing train 60 have to be serviced, the servicing to be carried out not being carried out during operation

can be.

In the fourteenth method step 270, the slab heater 95 heats the second slab 130 from the ambient temperature, for example -30 ° C. to + 60 ° C., to the predefined roughing temperature, which is dependent on the second material. For example, in the case of steel, the predefined roughing temperature can be 1100 ° C to 1200 ° C, for example. The slab heater 95 heats the second slab 130 to the predefined roughing temperature in such a way that the second slab 130 is substantially heated through and is essentially at the predefined roughing temperature

having.

The second slab 130 is heated to the predefined roughing temperature in a fifteenth method step 275 of the slab rolling that follows the fourteenth method step 270.

street 100 fed.

The slab rolling train 100 can be operated in a reversing manner, so that the second slab 130 to be rolled into a second pre-strip 155 multiple times in the second conveying device and in opposite directions.

set to the second conveyor by the slab rolling

15th

20th

25th

30th

35

201900302 18

street 100 is led. As a result, the number of rolling stands of the slab rolling train 100 can be reduced compared to the roughing rolling train 60. The second slab 130 can also be guided through the slab rolling train 100 only once, so that the second slab 130 is finish-rolled to form the second pre-strip 155

Exits slab rolling mill 100.

When leaving the slab rolling train 100, the second sliver 155 can have a temperature of approximately 900 ° C. After the (hot) rolling in the slab rolling train 100, the second pre-strip 155 has a thickness between 15 and 45 mm. The second pre-strip 155 can be wound up by means of the second winding device 140 to form a second coil 160 in a sixteenth method step 280

become. The winding of the second pre-strip 155 by means of the second winding device 140 can take place without a mandrel. The second sliver 155 can also be on a second mandrel or a second reel

be wound up.

If the continuous caster 55 and / or the pre-rolling train 60 is at a standstill, for example if there is not enough metallic melt 105 or the continuous caster 55 and / or the pre-rolling train 60 and / or the converter are being serviced, the transport device 20 transports the in a seventeenth method step 285 Second pre-strip 155 wound to the second coil 160 from the second production line 25 to the first production line 15. It is advantageous if the second coil 160 is transported in a thermally insulated manner during transport in order to prevent the second coil 160 from cooling down. The transport can, for example, by means of the first crane 21 and / or the first roller conveyor and / or the coil transporter

respectively.

In an eighteenth method step 290, the second coil 160 is unwound on the first production line 15 by means of the unwinder 66 and the second pre-strip 155 is unwound before the second

Separating device 70 in a transport plane of the first pre-strip

116 introduced. The second sliver 155 is through the second

15th

20th

25th

30th

35

201900302 19

Separating device 70 instead of the first sliver 116 of

Intermediate heater 75 supplied.

In the following, the fifth to tenth method steps 225 to 250 described above for the second sliver 155 are used

Production of a second finished strip 170 also carried out.

In the fifth method step 225, the intermediate heater 75 heats the second sliver 155 to a further predefined finishing rolling temperature. The first finishing rolling temperature and the further finishing rolling temperature can be different or identical. In addition, the descaler 76 removes scale from the second roughing strip 155 in the sixth method step 230. The second roughing strip 155 is rolled in the finishing train 80 to the second finishing strip 170 in the seventh method step 235, the second roughing strip 155 being finish-rolled by the multiple second finishing stands 120 becomes. In this case, the finishing rolling train 80 is not reversing, for example, both in the case of the first pre-strip 116 and in the second pre-strip 155, but with the first conveying direction, namely from the continuous caster 55

in the direction of the first winding device 125, rolled.

After passing through the finishing rolling train 80, the second finished strip 170 is cooled in the cooling device 85 in the eighth method step 240 and wound up using the first winding device 125 to form a third coil 175 in the ninth method step 245. When the third coil 175 has been completely wound, the third separating device 90 separates the wound, second finished strip 170 in the tenth method step 250 from the second finished strip 170 running in the transport plane.

The second operating state 202 of the production plant 10 is maintained or the fifth to eighteenth method steps 225 to 290 are carried out or repeated until the production plant 10 can be operated again in the first operating state 201 and the first to fourth method steps 205 to 220 can be carried out . This can

15th

20th

25th

30th

35

201900302 20

for example after completion of the maintenance work on the continuous caster 55 and / or the roughing mill 60 and / or the

Be converter.

This embodiment and the operating method of the production plant 10 described above have the advantage that a second continuous casting plant can be dispensed with, so that the production plant 10 is particularly cost-effective and effective

can be operated.

In addition, second slabs 130 that have already been produced can be used to utilize the finishing rolling train 80. As a result, during maintenance of the continuous caster 55 and / or the pre-rolling train 60 and / or the converter, only part of the first production line 15 is idle, while the second production line 25 and the further part of the first production line 15 downstream of the second separating device 70 can be kept in operation. As a result, cooling, in particular the intermediate heater 75 and the finishing train 80, can be avoided. Furthermore, the production plant 10 shown in FIGS. 1 to 3 is also particularly suitable for production plants in which there is not enough liquid metal capacity available for the operation of a further continuous casting plant.

hand is.

FIG 5 shows a schematic representation of a production

plant 10 according to a second embodiment.

The production plant 10 is designed essentially identical to the production plant 10 shown in FIGS. 1 to 3. In the following, only the differences between the production plant 10 shown in FIG. 5 and that in FIGS

3 shown production plant 10 received.

The first production line 15 is housed in the first building 45 on the site 40. Spatially adjacent to the first building 45 is a second building 180 on the site 40

arranged. Spatially adjacent is understood to mean that the

15th

20th

201900302 21

second building 180 is located on site 40 and / or another minimum distance a2 between buildings 40, 180 is less than or equal to 150 m, preferably less than or equal to 100 m, in particular less than or equal to 50 m, in particular less than or equal to 30 m . The further minimum distance a

is at least 10 m.

The second production line 25 is housed in the further building 180. The transport device 20 runs between the first production line 15 arranged in the first building 45 and the second production line 25 arranged in the second building 180.

The production plant 10 shown in FIG. 5 can be operated with the method described in FIG. This refinement has the advantage that the enclosed volume of the buildings 45, 180 is particularly small and, as a result, the production plant 10

is particularly inexpensive.

15th

20th

25th

30th

35

201900302

22nd

List of reference symbols

10 production plant

15 first production line

20 Transport device

21 first crane

22 first crane runway

25 second production line

30 prefabricated stores

35 slab store

40 terrain

45 first building

50 slab conveyor

51 second crane

52 second roller conveyor

53 second crane runway

55 continuous caster

60 roughing mill

65 first separator

66 unwinder

70 second separator

75 intermediate heating

76 Descalers

80 finishing mill

85 cooling device

90 third separator

95 Slab heating

100 slab rolling mill

105 metallic melt

106 cleaning device

110 first slab

115 roughing mill

116 first opening act

120 finishing mill stands

125 first winding device

130 second slab

135 Slab Mill

140 second winding device

15th

20th

25th

30th

201900302

144 145 150 155 160 161 165 170 175 180 201 202 205 210 215 220 225 230 235 240 245 250 255 260 265 270 275 280 285 290

pan

23

first finished tape

first coil

second opening act

second coil

fourth separator

Interim storage

second finished tape

third coil

second building

first operating status

second operating state

first procedural step

second procedural step

third process step

fourth procedural step

fifth procedural step

sixth procedural step

seventh procedural step

eighth procedural step

ninth process step

tenth procedural step

eleventh procedural step

twelfth process step

thirteenth, fourteenth, fifteenth, sixteenth, seventeenth

eighteenth

Process step Process step Process step Process step Process step

Process step

24/34

Claims (12)

15 20 25 30 35 201900302 24 claims 1. Production line (10) - Having a first production line (15), a second production line (25) and a transport device (20), - wherein the first production line (15) has a continuous caster (55), a roughing train (60) and a finishing train (80), - wherein the second production line (25) has a slab rolling train (100), - wherein the transport device (20) is formed between the first production line (15) and the second production line (25), - The continuous caster (55) being designed to cast a first slab (110) from a metallic melt (105), - The pre-rolling train (60) being arranged downstream of the continuous caster in relation to a first conveying direction of the first slab (110), - The first slab (110) can be fed to the roughing train (60) and the roughing train (60) is designed to roll the first slab (110) to form a first roughing strip (116), - wherein the finishing train (80) is arranged downstream of the roughing train (60) in relation to the first conveying direction of the first slab (110) in the roughing train (60) and the first pre-strip (116) from the roughing train (60) into the finishing train (80) can be fed, characterized in that - the second production line (25) has a slab heating device (95) and a second slab (130) can be fed to the slab heater (95), - The slab rolling train (100) of the slab heater (95) based on a second conveying direction of the second Slab (130) is downstream, 15th 20th 25th 30th 35 201900302 25 - wherein the slab heater (95) is designed to heat the second slab (130) to a predefined roughing temperature, - wherein the slab rolling train (100) is designed to roll the second slab (130) to a second pre-strip (155), - wherein the transport device (20) is designed to transport the second pre-strip (155) from the slab rolling train (100) to the first production line (15) and to feed the second pre-strip to the finishing rolling train (80), - wherein the finishing rolling train (80) is designed, the first preliminary strip (116) to a first finished strip (145) or the second preliminary strip (155) to a second finished strip (170) to roll. 2. Production plant (10) according to claim 1, - Having a slab store (35) for storing at least one second slab (130), preferably several second slabs (130), and a slab conveying device (50), - wherein the slab store (35) is designed to store the second slab (130) at a temperature of -30 ° C to + 60 ° C for at least a period of 12 hours, preferably at least 24 hours, - wherein the slab conveying device (50) is formed at least in sections between the second production line (25) and the slab store (35), - wherein the slab conveyor (50) is designed to transport the second slab (130) from the slab store (35) to the second production line and the second production line (25) to be fed. 3. Production plant (10) according to one of the preceding claims, - wherein the second production line (25) has at least one winding device (140), - wherein the winding device (140) is designed that winding up the second pre-strip (155) into a coil (160), 15th 20th 25th 30th 35 201900302 26 - wherein the transport device (20) is designed to transport the coil (160) with the wound up second pre-strip (155) to the first production line (15), - An unwinder (66) which is designed to unwind the coil (160) is arranged between the roughing train (60) and the finishing train (80), - The second pre-strip (155) unwound the Fer- tigwalzstrasse (80) can be fed. 4, production plant (10) according to one of the preceding Expectations, - having a first building (45), - The first production line (15), the second production line (25) and the transport device (20) being arranged in the first building (45), - or - Having a first building (45) and a second building (180) arranged spatially adjacent to the first building (45), - The first production line (15) being arranged in the first building (45) and the second production line (25) being arranged in the second building (180), - wherein the transport device (20) is arranged and designed at least in sections between the first building (45) and the second building (180), the second pre-belt (155) from the second production line (25) arranged in the second building (180) to the in the first building (45) arranged first production line (15) to transport. 5. Production plant (10) according to one of the preceding claims, - wherein the transport device (20) has a crane (21) and a crane runway (22), - wherein the crane runway (22) at least in sections between the second production line (25) and the first Production line (15) is formed, 15th 20th 25th 30th 35 201900302 27 - The crane (21) being arranged to be movable on the crane runway (22), - wherein the crane (21) is designed, at least in sections, the second pre-strip (155) from the second production line (25) to the first production line (15) to transport. 6. Production plant according to one of claims 2 to 5, - wherein the slab conveyor (50) has a roller conveyor (52), - The roller conveyor (52) being arranged in front of the slab heater (95) in relation to the second conveying direction of the second slab (130), - The roller conveyor (52) being designed to close the second slab (130) at least in sections between the slab store (35) and the slab heater (95) transport. 7. Production plant (10) according to one of the preceding claims, - wherein the continuous caster (55) is designed as an endless continuous caster, - wherein the first pre-strip (116) on a first side with the first slab (110) and the first pre-strip (116 ) on a second side opposite to the first side is connected to the first finished strip (145). 8. Production plant (10) according to one of the preceding Expectations, - An intermediate heater (75) being arranged between the roughing train (60) and the finishing train (80), - wherein the intermediate heater (75) is designed to heat the first pre-strip (116) to a predefined first finishing rolling temperature, - wherein the second pre-strip (155) of the finishing train (80) between the intermediate heater (75) and the roughing train (60) is supplied, 15th 20th 25th 30th 35 201900302 28 - With the supply of the second pre-strip (155), the intermediate heater (75) is designed to heat the second pre-strip (155) to a predefined second finishing rolling temperature, - wherein the first predefined finishing rolling temperature is different or identical to the second prede- Finished finishing rolling temperature is. 9. The method for operating a production plant (10) according to one of the preceding claims, - The continuous caster (55) pouring the first slab (110) from the metallic melt (105), - wherein the first slab (110) from the continuous caster (55) is fed to the roughing train (60) and the roughing train rolls the first roughing strip (116) from the first slab (110), - wherein the first preliminary strip (116) is fed to the finishing rolling train (80) and the finishing rolling train (80) rolls the first preliminary strip (116) into the first finishing strip (145), - wherein the second slab (130) is fed to the slab heater (95) and the slab heater (95) heats the second slab (130) to the roughing temperature, - wherein the slab rolling train (100) rolls the second slab (130) to the second sliver (155), - wherein the transport device (20) transports the second pre-strip (155) from the second production line (25) to the first production line (15) and the second pre-strip (155) is fed to the finishing rolling train (80) instead of the first pre-strip (116), - wherein the finishing train (80) is the second pre-strip (155) rolled to the second finished strip (170). 10. The method according to claim 9, - wherein the second pre-strip (155) is wound into a coil (160), - wherein the coil (160) is transported from the second production line (25) to the first production line (15) becomes, 15th 20th 201900302 29 - The coil (160) being unwound and the second pre-strip (155) of the finishing rolling train (80) being unwound is fed. 11. The method according to claim 9 or 10, - The second slab (130) is fed to the slab heater (95) at a temperature of -30 ° C to + 60 ° C, - The slab heater (95) heating the second slab (130) to the roughing temperature, preferably from 1100 ° C to 1200 ° C. 12. The method according to any one of claims 9 to 11, - wherein the second slab (130) with a completely solidified metallic structure of the slab heater (95) is fed.