DE102010036020A1 - Method and device for recovering energy behind a continuous casting plant - Google Patents

Abstract

The invention relates to a method for recovering energy behind a continuous caster (1), the continuous caster (1) being followed by a roller table (2) and at least one flame cutting machine (5) for cutting a cast metal strand (3) to length. In order to achieve optimal use of the energy of the still hot metal strand and to ensure a high functionality of the continuous caster, the invention provides that in an area (4) behind the continuous caster (1) from the metal strand (3) a heat flow (6) at least a heat exchanger and / or thermocouple (7) is allowed to flow, with the heat energy absorbed by the heat exchanger (7) generating electrical energy in an energy conversion system (8) or electrical energy being generated directly with the energy absorbed by the thermocouple (7). The invention also relates to a device for recovering energy behind a continuous caster.

Description

The invention relates to a method for recovering energy behind a continuous casting plant, wherein the continuous casting plant is followed by a roller table and at least one flame cutting machine for cutting to length a cast metal strand. Furthermore, the invention relates to a device for recovering energy behind a continuous casting plant.

From the field of steelmaking is from the WO 2008/075870 A1 known to dissipate the resulting waste heat in the production of liquid iron by reduction in a fluidized bed reactor for high-pressure steam generation, through which then, for example, a steam turbine is operated to generate electricity.

In the EP 0 044 957 B1 For example, there is described a plant for recirculating the latent and sensible heat of exhaust gases from a cast iron cupola or similar melting device for the purpose of obtaining electrical and / or thermal energy in the form of steam and / or warm water. The system consists of a heat unit with a burner and two waste heat boilers through which the flue gases pass, as well as, in the production of electrical energy, a turbine powered by steam from a superheater and an alternator.

From the DE 2 622 722 C3 is a device for cooling of hot steel slabs following the last rolling process is known, in which the steel slabs are placed edgewise between arranged in parallel rows of vertical support columns. The radiated heat from the steel slabs is taken up by arranged between the holding columns cooling walls with cooling water flow through tube bundles and used for steam generation. Here an elaborate slab handling is necessary. Due to the constant change in the slab temperature and the discontinuous operation, the amount of steam generated varies, which adversely affects the steam consumer.

The EP 0 027 787 B1 describes a plant for recovering the sensible heat of slabs cast in the continuous casting process in a cooling chamber by means of air which is brought into direct contact with the slab surfaces by means of a blower. The air heated in this way then serves outside the cooling chamber as a heating medium, in particular for a guided in a thermodynamic cycle process cycle medium. Again, the slab handling is very expensive and by the opening and closing of the sluice gates a discontinuous or varying heat input to the heat exchanger can not be avoided. If water is vaporized in the slab chamber, as a result of slab handling in the storage room, hardly any vapor pressure can be built up. As a result, only relatively low steam temperatures occur at the heat exchanger of the heat consumer.

Furthermore, in DE 30 19 714 A1 presented a plant for the recovery of heat from hot steel slabs during transport on the roller table. For this purpose, between the roller table rollers and over the roller table cooling water flowed through pipes are mounted in which steam is generated by heating water. By this construction, a higher vapor pressure and thus a higher steam temperature can be generated in the pipes. Slabs are usually cut behind the continuous caster, transported on the roller table and stored as quickly as possible in stacks. This is especially true for higher quality slab materials. This results in a discontinuous heating process as a result of the slab transport.

Other similar solutions that deal with the recovery of energy, for example, in the DE 37 23 289 A1 , in the WO 2008/025325 A1 , in the JP 58215255 A , in the JP 60040657 A , in the JP 58215256 A and in the JP 59054454 A disclosed.

The invention is in the light of these prior art concepts the task of proposing a method and system for energy recovery of the cooling heat behind a continuous casting, with the conversion in electrical energy or use of process heat in other heat or steam consumers is possible in an improved manner. Particular emphasis is placed on a uniform transport process of the metal strand or slabs, so that an optimal mode of operation can be flexibly driven depending on the strand or slab material or the target slab stack temperature.

As slabs here and in the following text thin slabs, blocks, billets, beams or round steel or non-ferrous products can be understood. Generally, these various geometric products are also referred to herein as a metal strand.

The solution of this problem by the invention according to the method is characterized in that in a region behind the continuous casting of the metal strand a heat flow to at least one heat exchanger and / or thermocouple is allowed to flow, which is generated by the heat energy absorbed by the heat energy in an energy conversion plant or with the thermocouple absorbed energy is generated directly electrical energy. Said area is preferably the immediate area behind the continuous casting plant.

The at least one heat exchanger and / or the at least one thermocouple is preferably arranged movably, so that the heat exchanger and / or the thermocouple can be positioned in an operating position near the metal strand and in a non-operating position away from the metal strand, wherein the heat exchanger and / or the thermocouple is selectively moved to the operating position for energy recovery and moved to the non-operating position when not in use.

The flexibility of the system is substantially improved if a second flame cutting machine is optionally arranged at a location upstream in the conveying direction of the metal strand of the flame cutting machine, wherein the second cutting machine is in the non-operating position of the heat exchanger and / or the thermocouple for cutting the metal strand is used. Depending on the cast strand material, the front or rear cutting machine is used.

When using the at least one heat exchanger, the heat energy removed from the metal strand can be converted into a heat transport and / or working medium, wherein the heat energy contained in the heat transport and / or working medium in a steam engine, in particular in a steam turbine, with a connected generator for power generation and / or used for other purposes. In this case it can be provided that the heat transport and / or working medium is water or steam or thermal oil.

As a thermocouple such can be used with at least one doped semiconductor pair. In this case, a number of thermocouples can be used, which are connected together to form a thermoelectric generator (TEG).

A training provides that residual heat of the metal strand, which is not converted by the heat exchanger and / or the thermocouple into electrical energy, is used for another process that requires heat in the continuous casting any continuous casting can be produced, d. H. in particular thick or thin slabs, block, billet, carrier or round steel or non-ferrous products.

The device for recovering energy behind a continuous casting plant, wherein the continuous casting a roller table and at least one cutting machine for cutting a cast metal strand connects, according to the invention provides that in a region behind the continuous casting at least one heat exchanger and / or at least one thermocouple is arranged wherein the at least one heat exchanger and / or the at least one thermocouple is movably arranged so that the heat exchanger and / or the thermocouple can be positioned in an operating position close to the metal strand and in a non-operating position away from the metal strand.

In this case, a second flame cutting machine can be optionally arranged at a location which is upstream in the conveying direction of the metal strand of the flame cutting machine.

The at least one heat exchanger and / or the at least one thermocouple is preferably arranged on at least one support frame, which is arranged pivotable about an axis pointing in the conveying direction of the metal strand.

Alternatively, it is also possible that the at least one heat exchanger and / or the at least one thermocouple is arranged on at least one support frame, which is arranged to be translationally displaceable in a direction transverse to the conveying direction of the metal strand.

It is also possible that the at least one heat exchanger and / or the at least one thermocouple is arranged on at least one support frame, which can be raised by means of a moving element, in particular by means of a crane in the roller table.

The heat exchangers and / or thermocouples can be arranged near an upper side and near an underside of the metal strand, wherein the heat exchangers and / or thermocouples are then arranged as a whole as a unit movable. But it is also possible that heat exchangers and / or thermocouples are arranged near an upper side and near a bottom of the metal strand, wherein the heat exchangers and / or thermocouples near the top and the heat exchanger and / or thermocouples are arranged separately movable near the bottom.

The at least one heat exchanger and / or the at least one thermocouple can be provided at least on one side with a thermal insulation.

The at least one heat exchanger can have inlets and outlets for heat transport and / or working medium, which by means of high-temperature hoses or high pressure steam hoses or stainless steel ring shaft hoses or pressure-resistant pipe joints adjacent lines are connected to allow a positional adjustment of the heat exchanger.

In this case, connections, in particular pipe connections and wiring, between a fixed area and the movably arranged heat exchangers and / or thermocouples with releasable couplings, in particular with hose or pipe couplings and plugs, be provided.

The roller table can have heat-insulated roller table rollers. He may also have roller table rollers, which are free of cooling.

The area provided with heat exchangers and / or thermocouples may be located immediately after the continuous casting plant. However, it is also possible that this area starts at a distance of between 0 and 40 m behind the continuous casting plant.

The invention thus provides that the advantageous arrangement of the heat exchanger for heat or energy recovery or the thermocouples for power generation with TEG modules (TEG: Thermoelectric Generator) directly or in the range 0 m to 40 m behind the continuous casting starts. The said energy recovery is thus still preferably before the separation of the strand to a flame cutting machine and removal. This is the most interesting area for energy recovery because the energy flow is particularly high at the high temperature (average temperature approx. 1,200 ° C). Furthermore, the slab lingers here for a relatively long time. Before leaving the continuous casting plant until the completion of the firing cut, a 250 mm thick slab normally loses approx. 160 ° C.

Furthermore, it is particularly advantageous to use, instead of a fixed energy recovery unit in the area of the roller table, energy recovery units that can be moved out or swiveled on the top and bottom of the transport line or; Alternatively, it is also possible that the complete roller table with the flame cutting machine or the energy recovery unit can be moved laterally. The upper and lower energy recovery elements can be swung up, moved or moved separately or together as a unit.

A simple lifting in case of need of upper and lower heat exchanger units or thermocouples in the roller table with a crane can be advantageously provided. The insertion position of, for example, five to eight meters long individual units can be ensured by a docking centering. The pipe connections are made with quick release hose or pipe couplings (quick couplings). Cabling can be done via plug.

It is also a combination of the mentioned facilities consisting of areas of z. B. pivotable and liftable heat recovery units possible.

The movable heat exchangers or thermocouples (power generation modules TEG) have in particular the following advantages:
First, alternatively, depending on the slab material or the target slab stack temperature used in the conveying direction front cutting machine used or this area can be used as a heat exchanger section. In the second case, a flame cutting machine is provided in the conveying direction behind the heat exchanger section.

A shutdown of the energy recovery units or a prohibition of the heat supply to the heat exchanger can be made possible. This facilitates the commissioning of the energy recovery system and serves to protect the system in the event of a malfunction.

Swinging up the heat exchangers or the power generation unit further allows easy cleaning, maintenance and inspection of the equipment (eg, changing the roller castors or heat exchangers).

A further advantage is that space can be created in the field of cold strand disposal during sprue.

For slab slopes or other problems, the slabs can still be easily lifted by crane.

The use of the described method or device is not limited to conventional hot strip systems with thick or thin slabs, but can also be applied in a similar manner in the block, billet, carrier or round steel production, etc. with roller table or other transport device. Even in non-ferrous systems, the proposed technology can be used advantageously.

A process model determines the cutting machine used and controls the process of energy conversion, position of the heat exchangers or thermocouples, etc.

The invention proposal is preferably used on vertical casting machines, but it is also possible to use it on horizontal casting machines.

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

1 in the side view a continuous casting plant, with behind arranged roller table including energy recovery elements,

2 the top view of a 2-strand continuous casting with arranged behind it roller tables along with energy recovery elements according to 1 .

3 a section of the energy recovery units from an area behind the continuous casting plant,

4 the clipping according to 3 in an alternative embodiment,

5 an embodiment of a pivotable upper energy recovery unit in the area behind the continuous casting, seen in a section perpendicular to the conveying direction of the cast strand, and

6 an analog embodiment in the illustration according to 5 for the bottom.

In the 1 and 2 is a continuous casting plant 1 outlined in the cast metal strand 3 - Leaving vertically from a mold - is gradually redirected from the vertical V in the horizontal H. In the conveying direction F closes to the continuous casting 1 a roller table 2 in which the metal strand 3 here horizontally furthered. The roller table 2 forms a special area 4 in which - which is described in detail below - an energy recovery takes place. At the end of this special area 4 behind the continuous casting plant 1 is a flame cutting machine 5 arranged.

As in 2 you can see two continuous casters 1 arranged parallel to each other.

A second flame cutting machine 9 is also optional at the beginning of the special area 4 behind the continuous casting plant and is indicated in the figures with dotted lines.

The end of the continuous casting plant 1 where the area 4 in particular, is the place where the metal strand emerging vertically from the mold is completely deflected into the horizontal.

At the beginning of the special area 4 behind the continuous casting plant is also a cold strand disposal 13 intended. Behind the flame cutting machine 5 there is an area 14 , are arranged in the other facilities for strand processing, which, however, are not relevant in the context of the present invention. In conveying direction F behind this area 14 is for example a lift-off position 15 for the slabs (or billets etc.).

In the special area 4 behind the continuous caster is the cast and still very hot metal strand 3 on roller table rollers 16 promoted. The roller table rollers 16 can be thermally insulated and internally cooled (analogous to a roller hearth furnace). It is essential that in the special area 4 at least one heat exchanger 7 or a thermocouple or a thermoelectric generator 7 is arranged. The special area 4 serves as a heat exchanger section. Furthermore, it is essential that the heat exchanger 7 or the thermocouple or the thermoelectric generator 7 not stationary in the special area 4 is placed, but can be moved out of the production line or swung out. This mobility of the heat exchanger / thermocouple 7 is by arrows 17 in 2 indicated.

The heat exchanger 7 promotes a heated medium (eg thermal oil or similar medium as a heat carrier, preferably used at a relatively low pressure level of less than 10 bar) via a heat transport line 18 to an energy conversion plant 8th (Power generation plant, eg ORC plant, Kalina plant or conventional steam cycle plant) in which electrical energy is generated and introduced into a power grid. Excess waste heat can be in a cooler 19 be dissipated or via a line 20 be supplied to another heat consumer (for example, with a temperature of 80 ° C).

Some details of the facility are in 3 outlined. Here is the metal strand 3 (Slab, billets, blocks, beams, round steel, non-ferrous cast products) in conveying direction F on thermally insulated roller table rollers 16 promoted. Above the metal strand 3 There is a heat exchanger unit that contains a number of heat exchangers 7 having. The heat exchanger unit is with a thermal insulation 12 Mistake. Accordingly, a heat flow 6 from the hot metal strand 3 to the heat exchanger 7 and heat a heat transfer medium (eg thermal oil) in the same. In an analogous manner are in the area below the metal strand 3 heat exchangers 7 arranged, in each case between two roller table rollers 16 , which are each at a distance a. Again, there is a thermal insulation 12 intended. In addition to the above and below the metal strand 3 illustrated heat exchangers 7 can also be arranged side of the slab such elements.

At the entrance of the metal strand 3 in the heat exchanger section 7 (and analogous to the exit of the metal strand 3 from the heat exchanger section) is a foreclosure 21 , If necessary, by means of a fan 22 for a sufficient convection between metal strand 3 and heat exchangers 7 be taken care of to improve the heat transfer.

The double arrows 29 in 3 indicate in turn that the entire heat exchanger unit is arranged translationally displaceable or pivotable and can be moved out if necessary from the operating position to a non-operating position.

In 4 is outlined an alternative solution. Here are the elements for obtaining electricity as thermocouples 7 formed, which are interconnected to thermoelectric generators (TEG). In front of the thermocouples 7 are - the metal strand 3 facing - heat exchanger plates 23 arranged. The entire arrangement for energy, as far as this above the metal strand 3 is arranged by a support frame 10 held. On the support frame 10 also run cooling tubes 24 to cool the thermoelectric generators. The liquid cooling medium is via a pipeline 25 fed.

The electricity generated by the thermoelectric generators is via a power line 26 derived. As in the case of the solution 3 not only above and below the metal strand 3 thermoelectric generators 7 be arranged, but also the side of the metal strand 3 , In the embodiment according to 4 you can see that below the metal strand 3 between the roller table rollers 16 thermoelectric generators are arranged in the form of modules that control the distance between the roller table rollers 16 essentially complete.

There are three different ways of designing these modules outlined. Far left is below the metal strand 3 a module shown with a heat exchanger plate 23 is provided. Inside the module run cooling tubes 24 , In the middle is below the metal strand 3 to see a module in which the cooling of the TEG modules with ribs 27 takes place, which can be water or air cooled. Again, there is a heat exchanger plate 23 intended. On the far right below the metal strand is a module, which acts as a self-supporting module 28 is formed and works without heat exchanger plate. The ones here below the metal strand 3 Outlined possibilities can of course also above the metal strand 3 be used.

Also in 4 is by double arrows 29 indicated the direction of movement in which the heat exchanger or thermocouples (TEG) process, ie either translationally moved or can be pivoted to place the energy harvesting elements either in the illustrated operating position or to arrange in a non-operating position (not shown) outside a working position.

In 5 is outlined in this regard, a concrete solution, ie an arrangement with which the heat exchanger or thermocouples 7 between said operating position (in 5 represented) or a non-operating position, not shown, can be arranged. In 5 this is shown for the part of the plant, which is above the metal strand or the slab 3 located.

The energy recovery elements (here heat exchanger 7 ) are in turn on a support frame 10 attached. This is with a thermal insulation 12 provided at the of the slab 3 remote side of the heat exchanger are arranged. Structural elements of the construction are the heat exchangers or thermocouples 7 and through the thermal insulation 12 from the radiant heat 6 of the metal strand 3 shielded.

Depending on the type of energy harvesting elements 7 are power connections or - as shown - high temperature hoses 32 present, leading to heat transport lines 33 lead, which in turn lead to the power generation plant. Through the connection by means of hoses, the mobility of the support frame 10 ensured. Pipe joints, stainless steel ring shaft hoses and high-temperature high-pressure hoses can also be used.

The internally cooled roller table rollers 16 be from a drive 30 driven. Between the load-bearing windows of the roller table rollers 16 , is a roll insulation 31 arranged. The small contact area of the metal strand 3 with the roller table rollers 16 as well as the roll insulation between them 31 significantly reduce the temperature losses in this particular area 4 ,

The support frame 10 is arranged pivotally. This is about an axis 11 rotatably suspended. An actuator 34 , which can work pneumatically, hydraulically or electrically, can the support frame 10 in the direction of movement 17 pivot.

In 6 is an analogous arrangement for the heat exchangers or thermocouples 7 outlined below the metal strand or slab 3 are arranged. Again, the support frame 10 by means of the actuating element 34 be pivoted, s. direction 17 , The between the roller table rollers 16 arranged heat exchanger or thermocouples 7 can be swung upwards. Alternatively, a folding down to the side or to the front and / or in the sintering trough is possible.

The axes 11 the pivoting movement for the upper and the lower support frame 10 can on one side of the metal strand 3 or on different sides of the metal strand 3 lie. The carrying racks 10 can, seen in the conveying direction F, be segmented, ie, it can be arranged behind one another several support frames 10 be used.

Alternatively, the upper and lower support frame can be used together with an actuating element 34 be pivoted.

In addition to the illustrated possibility of movement of energy harvesting elements 7 it is, as already stated, of course, also possible, a translational displacement of the elements 7 to bring them either in working position or out of this.

In general, therefore, are pivotable or movable or simply liftable into the production line heat exchanger or thermocouples 7 provided that give the procedure a high flexibility.

LIST OF REFERENCE NUMBERS

1

continuous casting plant

2

roller table

3

metal strand

4

special area behind the continuous caster

5

Cutting machine

6

heat flow

7

Heat exchanger / thermocouple

8th

Energy conversion plant (conventional steam engine, ORC plant)

9

second flame cutting machine

10

supporting frame

11

axis

12

thermal insulation

13

Cold leg disposal

14

Area for other facilities

15

lift-off

16

Roller conveyor roll

17

movement direction

18

Heat transport line

19

cooler

20

management

21

isolation

22

fan

23

heat exchanger plate

24

cooling pipe

25

pipeline

26

power line

27

rib

28

self-supporting module

29

movement direction

30

drive

31

roll insulation

32

High temperature hose

33

Heat transport line

34

actuator

V

vertical

H

horizontal

F

conveying direction

a

distance

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2008/075870 A1 [0002]
• EP 0044957 B1 [0003]
• DE 2622722 C3 [0004]
• EP 0027787 B1 [0005]
• DE 3019714 A1 [0006]
• DE 3723289 A1 [0007]
• WO 2008/025325 A1 [0007]
• JP 58215255 A [0007]
• JP60040657A [0007]
• JP 58215256 A [0007]
• JP 59054454 A [0007]

Claims (27)

Process for the recovery of energy behind a continuous casting plant ( 1 ), whereby the continuous casting plant ( 1 ) a roller table ( 2 ) and at least one flame cutting machine ( 5 ) for cutting a cast metal strand ( 3 ), characterized in that in one area ( 4 ) behind the continuous casting plant ( 1 ) of the metal strand ( 3 ) a heat flow ( 6 ) to at least one heat exchanger and / or thermocouple ( 7 ), with the heat exchanger ( 7 ) absorbed heat energy in an energy conversion plant ( 8th ) electrical energy is generated or with the thermocouple ( 7 ) absorbed energy is generated directly electrical energy. A method according to claim 1, characterized in that the at least one heat exchanger and / or the at least one thermocouple ( 7 ) is movably arranged so that the heat exchanger and / or the thermocouple in an operating position near the metal strand ( 3 ) and in a non-operating position away from the metal strand ( 3 ) is positionable, wherein the heat exchanger and / or the thermocouple ( 7 ) is selectively moved to the operating position for energy recovery and is moved to the non-operating position when not in use. A method according to claim 2, characterized in that at a location in the conveying direction (F) of the metal strand ( 3 ) of the flame cutting machine ( 5 ), a second flame cutting machine ( 9 ), wherein the second flame cutting machine ( 9 ) in the non-operating position of the heat exchanger and / or the thermocouple for cutting the metal strand ( 3 ) is used. A method according to claim 3, characterized in that alternatively the flame cutting machine ( 5 ) or the second flame cutting machine ( 9 ) for cutting the metal strand ( 3 ) is used. Method according to one of claims 1 to 4, characterized in that when using the at least one heat exchanger ( 7 ) from the metal strand ( 3 ) removed heat energy is transferred into a heat transport and / or working medium, wherein the heat energy contained in the heat transport and / or working medium in a steam engine ( 8th ), in particular in a steam turbine, with a connected generator for generating electricity and / or used for other purposes. A method according to claim 5, characterized in that the heat transport and / or working medium is water or steam or thermal oil. A method according to claim 5, characterized in that as a steam engine ( 8th ) a conventional steam turbine, an ORC plant or a Kalina plant is used. Method according to one of claims 1 to 4, characterized in that as a thermocouple ( 7 ) Such is used with at least one doped semiconductor pairing. Method according to one of claims 1 to 4 or claim 8, characterized in that a number of thermocouples ( 7 ), which are interconnected to a thermoelectric generator (TEG). Method according to one of claims 1 to 9, characterized in that residual heat of the metal strand ( 3 ), not by means of the heat exchanger and / or the thermocouple ( 7 ) is converted into electrical energy, used for another process that requires heat. Method according to one of claims 1 to 10, characterized in that in the continuous casting plant ( 1 ) Thick or thin slabs, block, billet, carrier or round steel or non-ferrous products are produced. Method according to one of claims 1 to 11, characterized in that the area ( 4 ) equipped with heat exchangers and / or thermocouples ( 7 ), immediately after the continuous casting plant ( 1 ) is arranged. Method according to one of claims 1 to 11, characterized in that the area ( 4 ) equipped with heat exchangers and / or thermocouples ( 7 ) at a distance of between 0 and 40 m behind the continuous caster ( 1 ) begins. Apparatus for recovering energy behind a continuous casting plant ( 1 ), whereby the continuous casting plant ( 1 ) a roller table ( 2 ) and at least one flame cutting machine ( 5 ) for cutting a cast metal strand ( 3 ), in particular for carrying out the method according to one of claims 1 to 13, characterized in that in one area ( 4 ) behind the continuous casting plant ( 1 ) at least one heat exchanger and / or at least one thermocouple ( 7 ), wherein the at least one heat exchanger and / or the at least one thermocouple ( 7 ) is movably arranged so that the heat exchanger and / or the thermocouple in an operating position near the metal strand ( 3 ) and in a non-operating position away from the metal strand ( 3 ) is positionable. Apparatus according to claim 14, characterized in that at a location in the conveying direction (F) of the metal strand ( 3 ) of the flame cutting machine ( 5 ), a second flame cutting machine ( 9 ) is arranged. Apparatus according to claim 14 or 15, characterized in that the at least one heat exchanger and / or the at least one thermocouple ( 7 ) on at least one support frame ( 10 ) arranged around a in the conveying direction (F) of the metal strand ( 3 ) pointing axis ( 11 ) is arranged pivotably. Device according to one of claims 14 to 16, characterized in that heat exchangers and / or thermocouples ( 7 ) near a top and near a bottom of the metal strand ( 3 ), wherein the heat exchangers and / or thermocouples ( 7 ) are arranged in total as a unit movable. Device according to one of claims 14 to 16, characterized in that heat exchangers and / or thermocouples ( 7 ) near a top and near a bottom of the metal strand ( 3 ), wherein the heat exchangers and / or thermocouples ( 7 ) near the top and the heat exchangers and / or thermocouples ( 7 ) are arranged separately movable near the bottom. Device according to claim 14, 15, 17 or 18, characterized in that the at least one heat exchanger and / or the at least one thermocouple ( 7 ) on at least one support frame ( 10 ) arranged in a direction transverse to the conveying direction (F) of the metal strand ( 3 ) is arranged translationally displaceable. Device according to claim 14, 15, 17 or 18, characterized in that the at least one heat exchanger and / or the at least one thermocouple ( 7 ) on at least one support frame ( 10 ) is arranged, which by means of a moving element, in particular by means of a crane, in the roller table ( 2 ) can be lifted into it. Device according to one of claims 14 to 20, characterized in that connections, in particular pipe connections and cabling, between a fixed area and the movably arranged heat exchangers and / or thermocouples ( 7 ) are provided with releasable couplings, in particular with hose or pipe couplings and plugs. Device according to one of claims 14 to 21, characterized in that the at least one heat exchanger and / or the at least one thermocouple ( 7 ) at least on one side with a thermal insulation ( 12 ) are provided. Device according to one of claims 14 to 22, characterized in that the at least one heat exchanger ( 7 ) Has supply and discharge lines for heat transport and / or working medium, which are connected by means of high-temperature hoses or high-pressure steam hoses or stainless steel ring tube or pressure-resistant pipe joints with adjacent lines to a position adjustment of the heat exchanger ( 7 ). Device according to one of claims 14 to 23, characterized in that the roller table ( 2 ) has heat-insulated roller table rollers. Device according to one of claims 14 to 24, characterized in that the roller table ( 2 ) Roller blocks, which are free of cooling. Device according to one of claims 14 to 25, characterized in that the area ( 4 ) equipped with heat exchangers and / or thermocouples ( 7 ), immediately after the continuous casting plant ( 1 ) is arranged. Device according to one of claims 14 to 25, characterized in that the area ( 4 ) equipped with heat exchangers and / or thermocouples ( 7 ) at a distance of between 0 and 40 m behind the continuous caster ( 1 ) begins.

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