JP2018515344A - Casting and rolling equipment and method for operating the casting and rolling equipment - Google Patents

Abstract

The present invention relates to a casting and rolling equipment 1 for producing a metal strip 2, wherein the metal strip 2 passes through the casting and rolling equipment 1 in the conveying direction F, and the casting and rolling equipment 1 A mold with a vertical outlet for the formation of cast strands, and a strand guide 4 subsequently arranged in the conveying direction F on the mold for turning the cast strands from a vertical state to a horizontal state A casting machine 3, at least one straightening mechanism 6 for drawing the cast strand from the strand guide 4, a separating device 9, in particular a shearing machine, and for heating the cast strand A connection system 5 subsequently arranged in the conveying direction F on the strand guide 4, comprising a furnace 7, and the casting strand to the metal strip 2 For the rolling, the connection system 5 is provided with a rolling mill 8 that is subsequently arranged in the transport direction F. In order to be able to produce high-value metal strips with low investment costs and operating costs, the strand guide 4 has only one or two roller segments and guides the strands of the roller segments The roller provided for this purpose is released from the drive. The invention further relates to a method for the operation of such a casting and rolling installation.

Description

The present invention relates to a casting and rolling facility for the production of metal strips for a small annual production volume,
At that time, the metal strip passes through the casting and rolling equipment in the conveying direction,
This casting and rolling equipment
A mold having a vertical outlet for forming a cast strand, and a strand guide subsequently disposed in the mold in the transport direction for turning the cast strand from a vertical state to a horizontal state. Casting machine,
The transport direction in the strand guide comprising at least one straightening mechanism for drawing the cast strand from the strand guide, a separating device, in particular a shearing machine, and a furnace for heating the cast strand. A connection system subsequently located in the
A rolling mill subsequently arranged in the conveying direction in the connection system for rolling the cast strands onto the metal strip.
The invention further relates to a method for the operation of such a casting and rolling installation.

  A casting and rolling facility of the style described at the beginning is known from US Pat. Similar and other solutions are disclosed in Patent Literature 2, Patent Literature 3, Patent Literature 4, and Patent Literature 5.

  So-called CSP equipment is typically used in embodiments in vertical solid bending (VSB) equipment (Vertical Solid Bending (VSB) -Angelgen) or vertical unsolidified bending (VLB) equipment (Vertical Liquid Bending (VLB) -Angelens. ) And activated. Such equipment is designed for production of over one million tons per year.

  In particular, for a small annual production of less than 800,000 tons, for example, in the dimensions of 1300 mm x 45 mm, producing high quality strips with the lowest possible investment costs and the lowest operating costs Therefore, a special configuration is required.

European Patent No. 0 535 368 B1 Specification European Patent No. 0 099 076 B1 European Patent No. 2 571 640 B1 International Application Publication No. 2013/113832 A1 Pamphlet German Patent Application Publication No. 10 2010 022 003 A1

  Therefore, the problem underlying the present invention is to improve the casting and rolling apparatus of the type described at the beginning so that the functionality of the equipment can be improved, with a high investment cost and a low operating cost. It should in particular be possible to produce metal strips of value.

  The solution to this problem is that, according to the invention, the strand guide has only one or two roller segments, the rollers of the roller segments being provided for guiding the strands being driven by the drive device. Characterized by not having.

  In doing so, the connection system between the steelmaking machine and the rolling mill is configured in particular so that the strands have a sufficiently high average temperature for the subsequent rolling operation, on the furnace entry side. ing. By this, the furnace should no longer be heated in the normal casting operation state for the subsequent rolling operation, or only in unusual requirements.

  If there are two roller segments in the strand guide, these roller segments are advantageously formed essentially in the same structure.

  The strand guide is then advantageously formed to curve the cast strand so that the cast strand has a minimum radius of curvature of 2,100 mm.

  The strand guide is advantageously at least partly in the shape of a clothoid curve.

  The mold is advantageously formed as a vertical or curved mold.

  The length of the mold is preferably a maximum of 1,100 mm, particularly preferably a value between 900 mm and 1,000 mm.

  The height of the non-molded strand guide is then advantageously at a maximum of 3 m. Therefore, it is basically lower than known comparable equipment.

  The connection system advantageously has a separating device, in particular a shear, which is provided between the straightening mechanism and the furnace. The straightening unit and the shearing machine are structurally assembled as a “straightening shearing machine”.

  Since the furnace does not require the strands to be heated in normal casting operations, the furnace can be configured very short (less than 100 m). The furnace should be at least long enough to allow the slab to be entirely contained within it and be accelerated from the casting speed to the rolling speed (furnace length = slab length + acceleration length). ).

  The furnace therefore advantageously has a minimal length. This length consists of a slab length, an acceleration length and an additional heating length for heat loss compensation.

  The connection system further comprises a dummy bar carry-out unit, preferably a dummy bar rocking base, with integrated insulation.

  The strand guide is advantageously terminated before the tangent point, which is advantageous at low production volumes in order to maintain a minimum energy requirement.

  The strand guide can likewise terminate at the tangent point or behind this tangent point. This is advantageous at relatively high production volumes.

  The straightening and drive mechanism unit advantageously has driven rollers on the upper and lower sides of the slab. This is advantageous because it doubles the pulling force.

  The furnace is advantageously shorter than 100 m. The furnace has at least one inductive heating element according to one embodiment. Furthermore, the furnace is provided with at least one thermal hood in the transport direction, before or after.

  The heating unit is therefore specially adapted to the requirements of short casting machines. This heating unit is advantageously derived from a short furnace (shorter than 100 m, for example 60 m in a 50 m strip length as well) or optionally with a subsequent passive thermal hood. Consists of a typical heating device.

  The dummy bar can be separated and conveyed upward between the separation device and the furnace. In casting operations, this space is protected against heat loss by a movable heat hood. In order to carry out the dummy bar, the thermal hood is slid onto the subsequent furnace.

  In accordance with the present invention, a method for the operation of such a casting and rolling installation is provided in which the cast strands cast in the casting machine are fed to the rolling mill without further heating in the furnace, and in the rolling mill. Is performed by rolling.

  In this case, advantageously, the cast cast strand is cooled in the strand guide to the extent that the cast cast strand is completely solidified when it reaches the straightening mechanism.

Advantageously, the cast strands cast are controlled by controlling the amount of cooling water and / or the casting speed to the extent that they are completely solidified in the conveying direction 500 mm to 10 mm before the last roller of the strand guide. It is cooled in the strand guide.
This treatment method is particularly advantageous with regard to low investment costs and operating costs.

  The solidification fraction FS (= solid fraction = solid fraction) in the final solidification zone is then preferably precisely FS = 1.0 in the range from FS = 0.9 to 1.0. .

  The puddle tip is therefore placed within the target interval for the purpose, which is done by controlling the casting speed and / or the cooling volume flow.

  The strand guide segments can be exchanged to increase the radius of curvature, which is advantageous for crack sensitive steels or relatively thick thicknesses. Thus, simple expansion of the micro CSP facility is possible for relatively high value steel or relatively high production volumes.

  The furnace entry side temperature is then advantageously higher than 1,050 ° C. Due to the short casting machine and the compact structure of the connection system, at this furnace entry temperature, the strand is prepared in an optimized state, so that this strand is subsequently rolled in the furnace. Therefore, no further heating is required.

  Advantageously, carbon steel having a low and moderate carbon content is treated. The dimensions are then advantageously between 40 and 60 mm, preferably between 45 and 55 mm, but likewise other steels with comparable dimensions are also advantageously treated. Is done.

  The present invention therefore relates to the coupling of a steelmaking machine with a rolling mill by means of a small casting machine (microcasting machine) and a connection system.

The compact structure of the casting machine with the connection system realizes low investment costs with low operating costs. This is achieved by components having small dimensions and short spacing. In addition, due to the low cost production conditions, high run temperatures of the cast strands at the end of the casting machine are necessary.
Due to the compact construction according to the invention, a little energy is lost, so that it must be supplied only in special production conditions in the subsequent furnace system.

In this case, a carbon steel having a low and medium carbon content, mainly having an exit thickness from the strand guide of the casting equipment of between 40 mm and 60 mm, preferably 45 mm to 55 mm. However, other steels with comparable dimensions should be cast as well.

  In response to the above, the present invention makes the connection between the steelmaking machine and the rolling mill by bundling a suitable casting machine with a connection system as a key component. This connection comprises the basic components: ladle rotating column, distributor, casting machine with mold, straightening mechanism unit, shearing machine, dummy bar unloading system, and furnace system. The key component is a casting machine with a short strand guide and a small spacing to the furnace.

  In particular, then, in the present invention, the components behind the casting machine, such as the straightening mechanism unit, the shearing machine, the dummy bar unloading system and the furnace system, are called the connection system.

  In the figure, an embodiment of the invention is illustrated.

1 is a schematic view of a casting and rolling facility in which a driven segmentless casting machine is used. FIG. 6 is a table in which allowed elongation, minimum radius of curvature, and maximum strand thickness are presented for different materials. It is a figure of a strand guide which has a casting_mold | template and the 1st correction mechanism roller before the tangent point T. FIG. FIG. 2 is a view of a strand guide having a mold and a first straightening mechanism roller at a tangent point T; It is a figure of a strand guide which has a 1st correction mechanism roller behind a casting_mold | template and the tangent point T. FIG. FIG. 3 is a diagram of a strand guide having one segment and two segments. FIG. 2 is a diagram of the structure of the strand guide, which is roughly dependent on the production volume. FIG. 5 is a diagram of a connection system as a structural unit with a compact straightening mechanism and shearing machine. FIG. 6 is a diagram of a dummy bar swinging table as a passive extension of a furnace in a casting operation. It is a figure of the dummy bar rocking | fluctuation stand as a passive extension part in the case of transfer of a dummy bar. It is a figure of the movable heat | fever hood at the time of carrying out a dummy bar. FIG. 3 is a diagram of a movable thermal hood during production. It is a figure of the progress plan for process control at the time of roll exchange.

  In FIG. 1 a casting and rolling installation 1 for the production of a metal strip 2 can be seen. This equipment comprises a casting machine 3 in which liquid metal flows out of the mold 14 downward in the vertical direction and along the strand guide 4 from a vertical state to a horizontal position. Turned in the direction of the state. The material of the strip or the strip itself is transported through the equipment 1 in the transport direction F.

  The facility 1 further has a rolling mill 8. A connection system 5 is provided between the casting machine 3 and the rolling mill 8. This connection system 5 comprises a straightening mechanism 6, a subsequent separation device, preferably a shearing machine 9 and a furnace 7, and further provided with a dummy bar oscillating table (Kaltstreng-Wipe) 10. Yes.

  In FIG. 1, a tangential point T is further entered, and the cast metal strip 2 enters the horizontal state at this tangential point.

  The strand guide 4 has only one roller segment or only two roller segments, the rollers of the roller segment provided for guiding the strands having no drive device That is important. Rather, the cast metal strip is withdrawn from the casting machine 3 by the straightening mechanism 6.

  Due to the small (annual) production that is being achieved, a ladle with a relatively small volume, and concomitantly, a compact ladle rotating column and a dispensing device can be used.

  Optionally, for this purpose ladle transfer is possible via a ladle trolley; and yet another alternative possibility is advantageously two for these ladles: It exists by means of a fixed storage space as well as in transport using steelworks cranes.

  Regarding the mold 14, the following is commented: In a standard CSP facility for production of more than 1 million tonnes per year, a hopper-shaped mold with a length of 1,100 mm in most cases is 8 m. Used for casting speeds up to / min.

  For casting machines in a compact construction mode, shortened hopper molds can be used, the length of these hopper molds being between 900 and 1,100 mm, depending on the respective advantageous casting speed. is there. In some cases, the mold can be made even smaller. At the same time, therefore, investment costs and operating costs are saved.

  With respect to the strand guide 4, the following is important: the immediate problem which is now a problem in the context of the compact structure of the mold and the strand guide according to the invention. Accordingly, one casting machine 3 is advantageously provided which is shorter than before. The strand guide 4 terminates in the curved portion of the strand guide before the correction mechanism 6, that is, inside the strand guide 4. This is necessary. This is because otherwise the pulling force required for the transfer of the strands cannot be transmitted.

  In order to keep the investment and operating costs, especially low, the average temperature of the strands at the end of the strand guide should be as high as possible. This is achieved by the smallest possible spacing of the final solidification position relative to the last roller of the strand guide, as well as by the most balanced temperature profile within the strand.

Based on the dependence on different production busy periods, for reasons of fluctuating process parameters such as casting temperature, cooling volume flow, radial roller spacing (= Mulweiten) and casting speed However, however, due to analytical variability, the position of complete clotting invariant position der Durcherrunning is prevented.
Therefore, final solidification must be achieved in the range of 10 mm to 500 mm, i.e. within the target interval, before the last roller of the strand guide.
This range of final solidification is defined by a solidification rate of FS = 0.9 to 1.0, ideally FS = 1.0.

  Since the furnace run-in temperature decreases in strength at relatively short puddle lengths (see the description of the furnace below), the puddle tip was given in advance to keep the furnace length short. Should be located within the target interval. This is achieved by controlling the casting speed and / or the cooling volume flow.

  The structure of the hopper-like mold—vertically or curved—has an influence on the configuration of the upper part of the strand guide.

  A possible form of construction of the mold is a vertical mold, i.e. the strand guide starts vertically or with a large radius of curvature (clothoid curve). Furthermore, curved molds are possible, i.e. the strand guides have the same radius of curvature or a decreasing radius of curvature.

  The radius of curvature of the strand guide is advantageously reduced starting from the radius present on the mold exit side, until reaching the minimum radius of curvature (see FIG. 2). Subsequently, there is the possibility of expanding this radius of curvature again to the end of the strand guide, for example in a double clothoid curve.

  The use of a minimum radius of curvature inside the strand guide induces a minimally reduced structural height. In addition, this gives a short strand guide length and thus a small spacing to the correction mechanism.

  The minimum radius of curvature within the strand guide depends on the material and the strand thickness. This radius of curvature depends on the maximum allowable elongation of the outer fiber of the curved strand (Aussenfaser). In this regard, please refer to the illustration in FIG.

  Similarly, for this purpose, a relatively thick strand thickness can be cast because of the relatively large radius of curvature in the strand guide.

  In doing so, it is important that the structure of the strand guide is defined by the production volume or casting speed, the strand thickness to be cast, and the material to be cast.

  At low production volumes (eg 500,000 tons per year), the strand guide 4 terminates before the tangent point T; and this situation is illustrated in FIG.

  At relatively high production volumes (eg 800,000 tonnes per year), the strand guide 4 terminates at or behind the tangent point T; and this situation is illustrated in FIGS. Has been. Here, in the strand guide, for example, the course of the radius of curvature is used in the manner of a double clothoid curve.

  Due to the small construction style, it is worth considering that the strand guide 4 is produced from only one segment. In a relatively large structural manner, however, two segments are provided. In FIG. 6, both of these possibilities are illustrated.

  A drive device inside the strand guide is not necessarily required. This is because the withdrawal of the strip 2 is undertaken by the straightening and drive mechanism unit present at the end of the strand guide 4.

  A relatively small strand guide length is required for relatively low production or casting speed.

  A somewhat longer strand guide length is required for intermediate production or casting speed.

  A relatively long strand guide length is required for relatively large production volumes or casting speeds.

  In FIG. 7, advantageous arrangements of the strand guide 4 and the straightening mechanism 6, respectively, are illustrated in dependence on the production capacity and with respect to the tangent point T.

  In order to lose as little temperature as possible by radiation, the spacing between the last supported roller and the straightening unit should be as small as possible. The fact that the strand guide 4 does not have any driven rollers is a cost reduction. In addition, the structurally necessary spacing between the last roller and the straightening unit can be protected against energy loss by insulation and radiation protection components.

  In order to expand product diversity and increase production, the following is commented: The production diversity of existing micro CSP facilities for low and medium carbon is In a simple manner, it should be expanded to crack-sensitive steel or relatively thick thickness (which corresponds to a relatively large production volume), and therefore the minimum curvature The radius should be expanded by exchanging segments.

This is illustrated in the following example:
At the maximum possible elongation, for a thickness of 40 mm, a radius of curvature of 2,100 mm is sought to be achieved.
2,100 mm / 40 mm≈2,400 mm / 45 mm.

  In accordance with the above, at the same elongation, a minimum radius of curvature of 2,400 mm is required for a 45 mm thick crack sensitive steel.

  The strand guide should be designed with the pre-given equipment height and the position of the straightening mechanism. This can be accomplished using an already curved hopper-like mold and a modified strand guide.

  The straightening mechanism 6 and the separating device (shearing machine) can be configured as a straightening mechanism-shearing machine structural unit 11 (see FIG. 8 in this regard).

  For yet another general cost reduction and to achieve a fast segment exchange time, the straightening and drive mechanism units and segments can advantageously be exchanged separately from one another, and thus this straightening And the drive mechanism unit does not need to be replaced together when the segment is replaced.

  The straightening and drive mechanism unit 6 consists of at least two roller pairs with a drive for force transmission for strand transfer. In order to double the pulling force, these rollers are driven on the upper and lower sides.

  In order to reduce the spacing between the straightening unit and the shearing machine, the straightening mechanism and the shearing machine can be integrated as a compact structural unit 11 (as a “straightening shearing machine”) (see FIG. 8). Optionally, the “straightening shear” can likewise be constituted by a driven straightening roller in front of the shearing machine and a straightening roller behind the shearing machine. In that case, based on the relatively high strand temperature, the shearer requires a relatively small shear force. As a result, the shearing machine and the driving device of the shearing machine can be configured to be relatively small and relatively compact by themselves.

  If a dummy bar feed-delivery zone is located between the straightening mechanism 6 and the shear 9, this region can also be configured as short as possible, and the insulation and radiation protection components Can be provided.

  In the region of the intermediate space of the equipment component, energy loss is reduced by the incorporation of insulation and radiation protection components. The shear 9 can be protected against high surface temperature thermal radiation of the strands by insulation and radiation protection components.

  The proposed installation further comprises a dummy bar carry-out unit, preferably a dummy bar rocking base 10 (in this regard, see FIGS. 9 and 10).

  A dummy bar feeding unit can be present between the straightening mechanism unit 6 and the shearing machine 9 or advantageously behind the shearing machine 9.

  If the dummy bar is separated from the strand head by a shearing machine 9, this area should likewise be as short as possible in order to lose as little energy as possible. All free sections can be covered by insulation and radiation protection components.

In a possible embodiment, the dummy bar is transferred above the furnace 7 via the rocking table 10 and removed there. In this case, the oscillating base 10 is configured such that the oscillating base 10 is positioned above the furnace 7 in a normal casting operation (see FIG. 9).
The length of this oscillating platform that extends beyond the furnace 7 in the direction of the casting machine 3 is protected downwards by insulation and radiation protection components. This insulation serves on the one hand to protect the rocking table 10 against the high temperature of the strands and on the other hand to reduce the energy loss of the strands.
Further insulating materials and radiation protection components are provided on the side wall of the oscillating table 10 and extend to the vicinity of the hall floor. By this, the space between the shearing machine 9 and the furnace 7 is formed as a kind of thermal hood: this allows a passive extension of the furnace 7.

  In an alternative embodiment (in this regard, see FIGS. 11 and 12), the dummy bar 12 is transported away from the shearing machine 9 and the furnace entry side towards the hall ceiling. Similarly, even in this embodiment, the distance between the shearing machine 9 and the furnace entry side can be protected against energy loss depending on the feeding and unloading of the dummy bar 12. Here, the thermal hood 13 is moved over the furnace 7, for example, or rotated onto the furnace 7 by a tilting device. In addition, protections for adjacent mechanical or electrical devices, such as, for example, shearing machine 9, against the high heat radiation of the furnace can be fitted.

  For all transfer rollers between the casting machine and the furnace entry side, no cooled rollers, preferably furnace rollers, are used. These rollers remove some energy from the lower side of the strands during roller contact.

  The furnace system can be heated with fossil fuels or electrically, in particular inductively. Similarly, a combination of both variations is possible. Optionally, an inductive heating device with a subsequent passive thermal hood or only one passive thermal hood can be used for the balance of the temperature profile.

  The furnace has at least the required rolling speed (about approx. 4 to 5 m / min), at least from the casting speed at which the slab can be entirely accommodated, and the slab subsequently enters further. , 18 m / min) should be long enough to be accelerated. For this purpose, a 60 m long furnace is sufficient for a slab length of about 50 m.

  It is important that the acceleration length is a length for accelerating the slab from the casting speed to the rolling speed.

  Regarding the furnace length, it is important that the minimum furnace length is the slab length plus the acceleration length.

  In order to adjust the roll change time, this minimum furnace length must be extended in some cases (see the theme of roll change time below).

  The furnace should actively heat the slab to this temperature only if the furnace entry temperature is below the lowest allowable rolling temperature.

In this regard, the following example is given:
For heating at 1,050 ° C., a high temperature slab requires the following additional furnace length at a furnace temperature of 1,100 ° C .:
1 m relatively short puddle length ≒ 28 m additional furnace length 1 m casting machine and uninsulated spacing between furnace entry side ≒ 5 m additional furnace length 1 m casting machine The distance between the insulation and the furnace entry side ≒ 2m additional furnace length where
d _puddle : = cooled puddle length d _spacing : = non- _insulated spacing between end of rolling mill and furnace d _{spacing insulation} : = insulation between end of rolling mill and furnace From these, regarding the furnace length additionally required for heating:
Additional required furnace length ≒ 28 x d _puddle + 5 x d _interval + 2 x d _{interval insulation}
Is given by

  From this approximation, the following becomes clear: the distance between the end of the casting machine, in particular the end of the target distance, and the furnace entry side should be kept as small as possible. .

  The sump point can be at the end of the casting machine (at the target interval).

  Between the end of the casting machine, in particular the end of the target spacing, and the furnace entry side, the strands or slabs can be protected against energy loss by insulation or radiation protection components.

  This induces the strands or slabs to enter the furnace at a relatively high temperature.

  Thus, the furnace can be configured to be relatively short (lower investment costs).

  In standard-manufacturing operating conditions, the strands or slabs should not be actively heated, or should be heated only slightly (less operating costs).

  A mathematical-physical model can be used for accurate temperature course calculations in the furnace.

  Due to the roll change time, the following is commented: In the rolling process, the roll wears and must be changed, for example every 5 hours, depending on the respective productivity and roll material. Don't be. The goal is to carry out this roll change without interruption of casting. This is because, in renewed casting, the risk of breakout increases and the mechanism unit must be replaced early.

  Sufficient time should be provided between the end of the preceding strip and the rolling of the new slab to perform the roll change without casting interruption. For this purpose, on the one hand the preceding strip rolling can be accelerated and on the other hand the casting of a new slab can be slowed. For this purpose, the casting speed is reduced.

  In order not to reduce the temperature excessively, the cooling in the casting machine is reduced corresponding to the casting speed. If the slab nevertheless cools in the furnace so that it can no longer be brought to the required rolling temperature, the slab must be chopped with a shearing machine. The required roll change time is a criterion for calculating the required furnace length.

  With knowledge of the required rolling speed, the casting speed and temperature control within the casting machine can be optimized so that the highest possible strand temperature is achieved. This reduces the energy requirement in the furnace and reduces operating costs.

  In this regard, the progress plan for process control during the roll change is illustrated in this regard.

DESCRIPTION OF SYMBOLS 1 Casting and rolling equipment 2 Metal strip / slab 3 Casting machine 4 Strand guide 5 Connection system 6 Straightening mechanism / straightening and drive mechanism unit 7 Furnace 8 Rolling mill 9 Separation device (shearing machine)
DESCRIPTION OF SYMBOLS 10 Dummy bar oscillating base 11 Correction mechanism-Shearing machine structural unit 12 Dummy bar 13 Movable thermal hood F Conveyance direction T Tangent point

Claims (21)

A casting and rolling facility (1) for the production of a metal strip (2),
The metal strip (2) passes through the casting and rolling equipment (1) in the conveying direction (F),
This casting and rolling equipment (1)
A mold with a vertical outlet for the formation of cast strands, and a strand guide subsequently arranged in the conveying direction (F) in the mold for turning the cast strands from a vertical state to a horizontal state A casting machine (3) having (4);
At least one straightening mechanism (6) for drawing the cast strand from the strand guide (4), a separating device (9), in particular a shearing machine, and a furnace (7) for heating the cast strand. And a connection system (5) disposed on the strand guide (4) in the transport direction (F).
The casting and rolling equipment (1) comprising a rolling mill (8) subsequently arranged in the transport direction (F) in the connection system (5) for rolling the cast strand onto the metal strip (2) In
The strand guide (4) has only one or two roller segments;
A casting and rolling facility, wherein a roller provided for guiding the strand of the roller segment does not have a driving device.   Casting and rolling equipment according to claim 1, characterized in that, in the strand guide (4), when two roller segments are present, these roller segments are basically formed in the same structure.   3. The strand guide (4) according to claim 1 or 2, wherein the strand guide (4) is formed to curve the cast strand so that the cast strand has a minimum radius of curvature of 2,100 mm. Casting and rolling equipment.   Casting and rolling equipment according to any one of claims 1 to 3, characterized in that the strand guide (4) is at least partly in the shape of a clothoid curve.   The casting mold facility according to any one of claims 1 to 4, wherein the mold is formed as a curved mold.   Casting and rolling equipment according to any one of claims 1 to 5, characterized in that the length of the mold is a maximum of 1,100 mm, advantageously between 900 and 1,000 mm. .   Casting and rolling equipment according to any one of claims 1 to 6, characterized in that the strand guide (4) without the mold has a height of at most 3 m.   The connection system (5) includes the straightening and driving mechanism unit (6) and the furnace (7), and a separating device is provided between the straightening and driving mechanism unit (6) and the furnace (7). (9) In particular, a shearing machine is provided, and the straightening and drive mechanism unit (6) and the separating device (9) are advantageously structurally formed as a unit of assembly. The casting and rolling equipment according to any one of claims 1 to 7, wherein   Casting and rolling equipment according to any one of claims 1 to 8, characterized in that the connection system (5) comprises a dummy bar swinging base (10) comprising an integrated insulating material.   Casting and rolling equipment according to any one of claims 1 to 9, characterized in that the strand guide (4) terminates before the tangent point (T).   Casting and rolling equipment according to any one of claims 1 to 9, characterized in that the strand guide (4) terminates at or behind the tangent point (T).   12. The straightening and driving mechanism unit (6) has driven rollers on the upper and lower sides of the slab (the metal strip) (2). Casting and rolling equipment described in 1.   Casting and rolling equipment according to any one of claims 1 to 12, characterized in that the furnace (7) is shorter than 100 m.   Casting and rolling installation according to any one of claims 1 to 13, characterized in that the furnace (7) has at least one inductive heating element.   Casting and rolling equipment according to claim 14, characterized in that at least one thermal hood is provided in the furnace (7) before or after in the conveying direction (F). A method for the operation of a casting and rolling installation according to claim 1-15,
The cast strand cast in the casting machine (3) is supplied to the rolling mill (8) without further heating in the furnace (7), and
A method characterized by rolling in the rolling mill.   The cast cast strand is cooled in the strand guide to such an extent that the cast cast strand is completely solidified when it reaches the straightening mechanism (6). 16. The method according to 16.   The amount of cooling water and / or the casting speed is such that the cast strand thus cast is completely solidified in the conveying direction (F) from 500 mm to 10 mm before the last roller of the strand guide (4). The method according to claim 15, wherein the cooling is performed in the strand guide by the control of the method.   The method according to any one of claims 15 to 18, wherein the furnace entry side temperature is higher than 1,050 ° C.   20. A method according to any one of claims 15 to 19, characterized in that carbon steel having a low and moderate carbon content is treated.   21. One of the claims 15 to 20, characterized in that the cast strand having a thickness between 40 and 60 mm, preferably 45 to 55 mm, runs from the strand guide of the casting facility. The method described in one.

Images