DE102022209148A1 - Continuous casting device and method for continuously casting a metal strand using a continuous casting mold - Google Patents

Abstract

The invention relates to a continuous casting device (10) and a method for continuously casting a metal strand using a continuous casting mold (11) through which molten metal is passed during the casting process. The continuous casting device (10) comprises a device (14) with at least one electromagnetic coil unit (16; 17) for applying magnetic fields to the melt in the continuous casting mold (11), this device (14) being arranged laterally of the continuous casting mold (11). and the device (14) with the electromagnetic coil unit (16; 17) can be moved translationally and horizontally in the direction of the continuous casting mold (11) or away from it. The electromagnetic coil unit (16; 17) can be moved translationally in the horizontal direction (H) and in the vertical direction (V).

Description

The invention relates to a continuous casting device for the continuous casting of a metal strand with a continuous casting mold according to the preamble of claim 1, and a corresponding method according to the preamble of claim 13.

According to the prior art, it is known to use electromagnetic coil systems for electromagnetically influencing the flow and solidification of the steel melt in specially designed continuous casting molds when continuously casting metallic products. This can be done by mounting coil systems on a continuous casting mold to generate electromagnetic braking and stirring effects and oscillating together with the mold. Such systems have the disadvantage of high oscillating additional masses. The resulting forces require more energy and must be taken into account when locking the mold in a controlled manner. In addition, a large number of electrical connections must be coupled. This also applies to the media connections, for example for the hydraulics.

Another conventional possibility for electromagnetically influencing a molten steel during continuous casting is that electromagnetic coils are moved away from the expansion space of the machine head in a rotational and/or translational manner or on a kinematic coupling curve or are moved onto and into the mold. Such horizontal adjustability of electromagnetic coils, for example, is not possible WO 2011/151105 A1 known. Such systems, which have stationary devices remaining in the system, are usually provided with massive steel yokes that conduct the magnetic flux or require large coupling joint frames and also require considerable investment. Furthermore, the free space within the machine head area is restricted by the surrounding yoke and/or the manipulation frames. This also makes access to the first strand guide segments more difficult, which is also due to the unchangeable final positioning of this arrangement.

Out of JP 4274849 A It is known to move electromagnetic coils up and down in the vertical direction relative to an adjacent continuous casting mold, while the horizontal or lateral distance of the coils from the mold remains unchanged.

Accordingly, the invention is based on the object of optimizing a continuous casting device for the continuous casting of a metal strand and a corresponding method with regard to the casting process.

This object is achieved by a continuous casting device with the features of claim 1 and by a method with the features specified in claim 13. Advantageous developments of the invention are defined in the dependent claims.

A continuous casting device according to the invention is used for the continuous casting of a metal strand with a continuous casting mold through which molten metal is passed during the casting process, and comprises a device with at least one electromagnetic coil unit for applying magnetic fields to the melt in the continuous casting mold, the device being located laterally from the continuous casting mold is arranged and the device with the electromagnetic coil unit can be moved translationally and horizontally in the direction of the continuous casting mold or away from it. The electromagnetic coil unit is translationally movable in the horizontal direction and in the vertical direction.

In the same way, the present invention provides a method for the continuous casting of a metal strand using a continuous casting mold, in which molten metal is passed through the continuous casting mold during the casting process and magnetic fields are applied to the melt in the continuous casting mold by means of at least one electromagnetic coil unit. During the continuous casting process, the electromagnetic coil unit is moved translationally in the horizontal direction and/or in the vertical direction relative to the adjacent continuous casting mold in order to set a predetermined value or distance for the position of the coil unit relative to the continuous casting mold.

The present invention is based on the essential finding that during operation of the continuous casting device according to the invention, at least one electromagnetic coil unit is translationally movable in the horizontal direction and in the vertical direction, or that in a corresponding method according to the invention at least one electromagnetic coil unit is translationally movable in the horizontal direction and in the vertical direction is moved. The internal and external quality of cast slabs can be improved through a targeted and variable adjustment of at least one electromagnetic coil unit with respect to height and/or distance parameters relative to an adjacent oscillating mold. Furthermore, the present invention enables operation with different types of molds, in conjunction with a targeted Movement and positioning of at least one electromagnetic coil unit relative to the mold adjacent to it, as explained above.

With the present invention it is possible to move at least one electromagnetic coil unit horizontally and/or vertically in translation, for example even during the casting of a metal strand. For the purposes of the present invention, this is referred to as an “online” mobility of at least one electromagnetic coil unit.

At this point it is specifically pointed out that, within the meaning of the present invention, a translational movement of at least one electromagnetic coil unit in the horizontal and vertical directions can also be realized by an “oblique” movement, in which the coil unit is moved translationally obliquely upwards or downwards , for example by appropriate actuation of actuators with which the coil unit is in operative connection, and / or with the help of a ramp or a comparable guide device. According to the invention, such an “oblique” translational movement (in the upward or downward direction) means that the horizontal and vertical displacement of the coil unit take place at the same time.

Basically, external coil systems or units, which can be specifically positioned relative to a mold, allow flexible adjustment and an optimal arrangement of brake coils (direct voltage field, or “DC field”) and/or stirring coils (alternating voltage field, or “AC field”). Field"). By means of the present invention, it is possible to move at least one electromagnetic coil unit horizontally in a targeted manner adjacent to a mold or its water tank and thereby to position it at a desired distance relative to the mold. In the case of a hybrid mold construction, at least one electromagnetic coil unit can be moved horizontally into a water box system adjacent to the mold. This applies equally to two or more electromagnetic coil units, which can be arranged one above the other adjacent to the mold. Furthermore, at least one electromagnetic coil unit, or a plurality of such coil units arranged one above the other, can be moved in the vertical direction (i.e. upwards or downwards) during the casting process.

In an advantageous development of the continuous casting device according to the invention, the at least one electromagnetic coil unit can be a brake coil (“DC field”) or a stirring coil (“AC field”). If two electromagnetic coil units are provided, one of these two coil units can be designed in the form of a brake coil (“DC field”), with the other of the two electromagnetic coil units then being designed in the form of a stirring coil (“AC field”).

With the present invention, through the flexible arrangement of at least one electromagnetic coil unit relative to an adjacent continuous casting mold and its online adjustability both in height and in distance from the casting level and the submerged entry nozzle (SEN - "Submerged Entry Nozzle"), it is possible that the continuous casting device according to the invention follows the jet inlet flow of the steel melt in an optimized manner and is adjusted to have the best possible effect in this regard.

In an advantageous development of the continuous casting device according to the invention, the device has a support frame structure on which the at least one electromagnetic coil unit is attached so that it can move at least vertically, with at least one actuator being provided on the support frame structure, which is in operative connection with the electromagnetic coil unit and with which the electromagnetic coil unit can be moved translationally in the vertical direction. The at least one electromagnetic coil unit is attached to the support frame structure in such a way that this coil unit interacts with an actuator and, when actuated, can also be displaced in the horizontal direction in a translational manner towards or away from the continuous casting mold.

Two electromagnetic coil units can also be mounted on the support frame structure, preferably vertically one above the other. In any case, these two coil units are preferably attached to the support frame structure in a vertically displaceable manner independently of one another, with actuators being provided on the support frame structure which are in operative connection with a respective electromagnetic coil unit and with which a respective electromagnetic coil unit can be moved translationally in the horizontal direction and in the vertical direction .

In an advantageous development of the continuous casting device according to the invention, a position detection system with at least one sensor is provided, with which a position of at least one electromagnetic coil unit in the horizontal direction and / or in the vertical direction relative to the adjacent continuous casting mold can be determined.

An advantageous development of the continuous casting device according to the invention comprises a processor unit which is in signal connection both with the position detection system and with an actuator for displacing at least one electromagnetic coil unit. The actuator can be controlled by means of the processor unit depending on a signal from the position detection system and a position of the electromagnetic coil unit determined thereby, so that the position of the electromagnetic coil unit relative to the adjacent continuous casting mold in the horizontal and / or vertical direction is set to a predetermined value or Distance is adjustable.

In the same way, according to an advantageous development of the method according to the invention, it is provided that a position of the electromagnetic coil relative to the continuous casting mold adjacent to it is continuously monitored, the position of the electromagnetic coil relative to the adjacent continuous casting mold is set in the horizontal direction and / or in the vertical direction to a predetermined value or distance.

In an advantageous development of the method according to the invention, two electromagnetic coil units are used to apply magnetic fields to the melt in the continuous casting mold, with a distance between these two coil units relative to each other or relative to the adjacent continuous casting mold translationally in the horizontal direction and / or in the vertical direction predetermined value is set.

In an advantageous development of the method according to the invention, the horizontal and/or vertical translational movement of at least one electromagnetic coil unit takes place during the casting of a metal strand. As already explained elsewhere above, such a movement of the electromagnetic coil unit is referred to as an “online” movement or setting in the sense of the present invention.

In an advantageous development of the method according to the invention, the movement of at least one electromagnetic coil unit takes place in such a way that a continuous adjustment to the filling level and/or to the immersion depth of an immersion tube of the continuous casting mold is carried out.

With regard to the above-mentioned method according to the invention, it should be noted at this point that this method can be carried out with a continuous casting device according to the invention, as also explained above.

• - Geringere oszillierende Massen.
• - Es sind flexible Kokillenkonzepte mit verschiedenen Gießzuständen und Wasserkastenbestückungen möglich.
• - Das zugehörige Kokillensystem ist flexibel zur Aufnahme verschiedener Stützrahmenkonstruktionen mit Öffnungen und Kupferplattendicken geeignet.
• - Das Bewegungsverhalten von zumindest einer elektromagnetischen Spuleneinheit wird nicht durch eine Zusatzmasse beeinflusst.
• - Die Rüstzeiten können verringert werden. In Folge dessen ist es möglich, die Produktion von Metallsträngen kurzfristig umzustellen und eine optimierte Brems- oder Rühreinwirkung auf die in einer Stranggießanlage montierte(n) Kokille(n) zu realisieren.
• - Durch die veränderliche Positionierung von zumindest einer elektromagnetischen Spuleneinheit können verschiedene Kokillenwasserkästen eingesetzt werden, sowohl mit als auch ohne Fensteröffnungen.
• - Durch eine schnelle Variation der Höhenparameter (d.h. in vertikaler Richtung) als auch der Abstandsparameter (d.h. in horizontaler Richtung) von zumindest einer elektromagnetischen Spuleneinheit relativ zu einer angrenzenden Stranggießkokille können verschiedene Air-Gaps für verschiedene Gießdicken bedarfsgerecht eingestellt werden.
• - Die elektromagnetische Feldwirkung von zumindest einer elektromagnetischen Spuleneinheit kann der Positionierung des Tauchausgusses optimiert folgen.
• - Mit Hilfe von mehreren Aktuatoren, die festseitig und losseitig einer Stranggießkokille vorgesehen sind, ist es möglich, eine optimierte Positionierung verschiedener Spulenkonfiguration für verschiedene Gießsituationen und Gießdicken zu erreichen.
• - Mittels der Erfindung wird ein Manipulationssystem mit elektromagnetischen Spuleneinheiten und Kokillenwasserkästen geschaffen, zur Generierung von gezielten magnetischen Feldeinwirkungen auf den Stahlschmelzenfluss in Stranggießkokillen.

Further advantages of the present invention result from the following aspects:

• - Lower oscillating masses.
• - Flexible mold concepts with different casting states and water tank configurations are possible.
• - The associated mold system is flexible to accommodate various support frame constructions with openings and copper plate thicknesses.
• - The movement behavior of at least one electromagnetic coil unit is not influenced by additional mass.
• - The setup times can be reduced. As a result, it is possible to change the production of metal strands at short notice and to realize an optimized braking or stirring effect on the mold(s) mounted in a continuous casting system.
• - Due to the variable positioning of at least one electromagnetic coil unit, different mold water tanks can be used, both with and without window openings.
• - By quickly varying the height parameters (ie in the vertical direction) as well as the distance parameters (ie in the horizontal direction) of at least one electromagnetic coil unit relative to an adjacent continuous casting mold, different air gaps can be set as required for different casting thicknesses.
• - The electromagnetic field effect of at least one electromagnetic coil unit can follow the positioning of the immersion spout in an optimized manner.
• - With the help of several actuators that are provided on the fixed and loose sides of a continuous casting mold, it is possible to achieve optimized positioning of different coil configurations for different casting situations and casting thicknesses.
• - The invention creates a manipulation system with electromagnetic coil units and mold water tanks for generating targeted magnetic field effects on the flow of molten steel in continuous casting molds.

• 1 eine schematisch vereinfachte Perspektivansicht einer erfindungsgemäßen Stranggießvorrichtung gemäß einer ersten Ausführungsform mit einer elektromagnetischen Spuleneinheit, die sich in der hier gezeigten Darstellung in einer Ruheposition befindet,
• 2 die Stranggießvorrichtung von 1, wobei die Spuleneinheit an eine angrenzende Stranggießkokille herangefahren ist (= Betriebsposition), um an eine Metallschmelze in der Stranggießkokille Magnetfelder anzulegen bzw. Magnetfelder in der Metallschmelze zu induzieren,
• 3 die Stranggießvorrichtung von 1 in einer Seitenansicht, wenn sich die Spuleneinheit in einer ersten Betriebsposition befindet,
• 4 die Stranggießvorrichtung von 1 in einer weiteren Seitenansicht, wenn sich die Spuleneinheit in einer zweiten Betriebsposition befindet,
• 5 eine schematisch vereinfachte Perspektivansicht einer erfindungsgemäßen Stranggießvorrichtung gemäß einer zweiten Ausführungsform mit einer elektromagnetischen Spuleneinheit, die sich in der hier gezeigten Darstellung in einer Ruheposition befindet,
• 6 die Stranggießvorrichtung von 5, wobei die Spuleneinheit an den Stützrahmen einer Stranggießkokille herangefahren ist (= Betriebsposition), um an eine Metallschmelze in der Stranggießkokille Magnetfelder anzulegen bzw. Magnetfelder in der Metallschmelze zu induzieren, und
• 7 die Stranggießvorrichtung von 6 in einer Seitenansicht, wenn sich die zugehörigen Spuleneinheiten in Betriebsposition befinden.

Exemplary embodiments of the invention are described in detail below using a schematically simplified drawing. Show it:

• 1 a schematically simplified perspective view of a continuous casting device according to the invention according to a first embodiment with an electromagnetic coil unit, which is in a rest position in the illustration shown here,
• 2 the continuous casting device from 1 , wherein the coil unit is moved to an adjacent continuous casting mold (= operating position) in order to apply magnetic fields to a molten metal in the continuous casting mold or to induce magnetic fields in the molten metal,
• 3 the continuous casting device from 1 in a side view when the coil unit is in a first operating position,
• 4 the continuous casting device from 1 in another side view, when the coil unit is in a second operating position,
• 5 a schematically simplified perspective view of a continuous casting device according to the invention according to a second embodiment with an electromagnetic coil unit, which is in a rest position in the illustration shown here,
• 6 the continuous casting device from 5 , wherein the coil unit is moved to the support frame of a continuous casting mold (= operating position) in order to apply magnetic fields to a molten metal in the continuous casting mold or to induce magnetic fields in the molten metal, and
• 7 the continuous casting device from 6 in a side view when the associated coil units are in the operating position.

Below are with reference to the 1 to 7 preferred embodiments for a continuous casting device 10 according to the invention and a corresponding method for continuously casting a metal strand are shown and explained. The same features in the drawing are each provided with the same reference numbers. At this point it should be noted that the drawing is simply simplified and, in particular, shown without a scale.

The continuous casting device 10 according to the invention is used for the continuous casting of a metal strand with a continuous casting mold 11 through which molten metal is passed during the casting process. In the figures, the pouring direction resulting in the molten metal is labeled “GR” and symbolized with a corresponding arrow.

In detail, the continuous casting device 10 comprises a device 14 with at least one electromagnetic coil unit, by means of which magnetic fields can be applied to the melt in the continuous casting mold 11. In other words, magnetic fields are induced in the molten metal located in the continuous casting mold 11 by means of the electromagnetic coil unit.

The device 14 with at least one coil unit is arranged to the side of the continuous casting mold 11. This device 14 with the at least one electromagnetic coil unit can be moved translationally and horizontally in the direction of the continuous casting mold 11 or away from it. In view of this mobility, the device 14 can be understood as a movable pallet truck unit, the horizontal movement of which is provided by running or guide wheels 23 (cf. 1 , 5 ) is guaranteed. As an alternative to such running or guide wheels 23, sliding strips or round guide rods can also be used, with which a translational movement in the direction of the continuous casting mold 11 (or away from it) is possible for the device 14 or pallet truck unit. This means that a horizontal movement for the at least one electromagnetic coil unit is achieved by means of the device 14 or pallet truck unit.

A coil unit, which is part of the above-mentioned device 14, can in turn comprise either an electromagnetic coil or a plurality of such coils.

In the 1-4 the continuous casting device 10 according to the invention is shown according to a first embodiment.

The 1 shows a simplified perspective view in which the continuous casting device 10 and, adjacent to it, a continuous casting mold 11 are shown.

The continuous casting mold 11 has two support frames, namely a mold support frame 12a on the fixed side of the mold (in 1 shown in the background of the picture), and a mold support frame 12b on the loose side of the mold (in 1 shown in the foreground).

The mold support frame 12a, 12b has an outside 13 on or in which window openings 24 are formed. In the representation of 1 Such window openings 24 can be seen on the outside 13 of the mold support frame 12b (on the loose side of the continuous casting mold 11).

With regard to the two mold support frames 12a, 12b, it goes without saying that these components can be designed identically or symmetrically. This means that at (in the 1 unrecognizable) outside 13 of the mold support frame 12a (on the fixed side of the continuous casting mold 11) such window openings 24 are also formed. The function of these window openings 24 will be explained separately below.

According to the representation of 1 the device 14 has a support frame structure 15 on which at least one electromagnetic coil unit 16 is mounted. At least one actuator 18 is provided on the support frame structure 15, which is in operative connection with the electromagnetic coil unit 16 and with which the electromagnetic coil unit 16 can be moved translationally in the vertical direction V. Thus, the electromagnetic coil unit 16 is attached to the support frame structure 15 in a vertically displaceable manner.

The perspective view of 1 clarifies that two coil units 16 can be attached next to each other on the support frame structure 15. In this case, each of these coil units 16 can be in operative connection with an associated actuator 18, namely for the purpose that when a respective actuator 18 is actuated, the associated coil unit 16 can be moved translationally in the vertical direction.

The support frame structure 15 is equipped with a further actuator 19, which interacts with the coil unit(s) 16. When this further actuator 19 is actuated or actuated, the coil unit(s) 16 in conjunction with the device 14 are translated translationally in the horizontal direction H towards the continuous casting mold 1 or away from it.

If two coil units 16 are arranged side by side on the support frame structure 15, these two coil units 16 are moved in the horizontal direction, preferably together by the actuator 19.

The side view of the continuous casting device 10 according to the invention 3 clarifies that this has a position detection system 20 with at least one sensor 21, with which a position of the electromagnetic coil unit(s) 16 in the horizontal direction H and/or in the vertical direction V relative to the adjacent continuous casting mold 11 can be determined.

Furthermore, the continuous casting device 10 according to the invention is equipped with a processor unit 22, which is in signal connection both with the position detection system 20 and with the actuators 18, 19 for moving the electromagnetic coil unit(s) 16. This applies equally to the first embodiment of the continuous casting device 10 according to the invention according to 1-4 as well as for their second embodiment according to 5-7 .

With regard to the window openings 24, which, as explained, are formed on or in the outside of the mold support frame 12a, 12b, it should be pointed out separately at this point that they are adapted to the external dimensions of the electromagnetic coil unit(s) 16 in this way , so that it is possible to insert the coil unit(s) 16 from the horizontal direction (H) and/or move the coil units (16; 17) in the vertical direction (V) within the window opening (24).

It should be noted at this point that the above explanations regarding the device 14, the support frame construction 15 and - mutatis mutandis - the window openings 24 also apply in the same way to the second embodiment of the continuous casting device 10 (cf. 5-7 ) apply and will therefore not be repeated in detail there.

In the representation of 1 the coil units 16 are in a rest position in which they are positioned against the continuous casting mold 11 in such a way that they are each positioned outside the window openings 24.

In contrast, the coil units 16 are shown in the illustration 2 in an operating position in which they have been moved translationally in the direction of the continuous casting mold 11 by means of an actuation of the actuator 19, such that they have moved into the window openings 24 adapted thereto. This means that the coil unit(s) 16 are located in their respective operating position in the associated window openings 24, and are therefore positioned relatively close to the continuous casting mold 11 and the melt located therein.

By means of the position detection system 20 and the associated sensor 21, a current position of the coil units 16 is recorded. To realize the above-mentioned horizontal movement with which the coil units 16, starting from the rest position according to 1 , translationally in the direction of the continuous casting mold 11 into its operating position 2 are moved, the actuator 19 is controlled by the processor unit 22 with a suitable signal, such that the two coil units 16 have a predetermined position laterally relative to the strand reach casting mold 11. In other words, the actuator 19 can be controlled by means of the processor unit (22) as a function of a signal from the position detection system 20 and a thus determined position of the electromagnetic coil unit(s) 16, so that the position of the electromagnetic coil units 16 is relative to the one adjacent to it Continuous casting mold 11 can be adjusted horizontally to a predetermined value or distance and so that the coil unit (s) 16 reaches or reaches its operating position.

By means of the actuators 18 it is possible to move the coil unit(s) 16 translationally in the vertical direction V. In the same way as with the translational movement in the horizontal direction, the actuators 18 can be controlled by means of the processor unit 22 depending on a signal from the position detection system 20 and a thus determined position of the electromagnetic coil unit (s) 16 in order to thereby control the coil unit (s) 16 to bring it into a desired vertical position or to set a predetermined value for this.

The side views of the 3 and 4 show the coil unit(s) 16 in a first operating position (cf. 3 ) and in a second operating position (cf. 4 ). What the first and second operating positions have in common is that the coil unit(s) 16 has or have reached a predetermined distance in the horizontal direction relative to the adjacent continuous casting mold 11. This will be in the 3 and 4 symbolized by the distance parameter H ₁ . In this regard, it should be emphasized that the coil unit(s) 16 is/are retracted into the window opening(s) 24 when the predetermined distance parameter _H1 has been reached or set.

A comparison of the two operating positions of 3 and 4 clarifies that in the first operating position the vertical distance or height parameter V ₁ that a lower edge of the coil unit 16 has from an upper opening of the continuous casting mold 11 is smaller than its vertical distance or height parameter V ₂ in the second operating position. This is due - in the vertical direction - to the comparatively lower position of the coil unit(s) 16 in the second operating position, which can be achieved by actuating the actuator (or actuators) 18.

With regard to the movability or adjustability of the coil unit(s) 16 in the vertical direction by means of the actuator (or actuators) 18, it is specifically pointed out at this point that this is also possible if the coil unit(s) 16 their operating position in the horizontal direction (cf. distance parameter H ₁ , cf. 3 + 4 ) have already achieved. In other words, a change in the vertical position of the coil unit(s) 16 is also possible if it is already located in the window opening(s) 24.

A change in the operating position of the coil unit(s) 16 in the vertical direction can also be done “online”, i.e. as explained above, also during the casting process. It is possible to set a variety of different positions in the vertical direction for the coil unit(s), preferably by controlling the actuator (or actuators) 18 by the processor unit 22 as a function of a signal from the position detection system 20. This allows for the coil unit(s) 16 can be approached or tracked to a large number of height parameters Hi.

If two electromagnetic coil units 16 are attached next to one another on the support frame structure 15, these coil units 16 can be adjusted independently of one another with respect to a desired or predetermined height parameter V ₁ , V ₂ , V _n by means of a respective associated actuator 18, if necessary. If, on the other hand, a synchronous adjustment of these two coil units 16 in the vertical direction is always desired, it is also possible to move these two coil units 16 in the vertical direction via a common actuator 16 and thus set a desired height parameter V ₁ , V ₂ , V _n .

As already explained elsewhere above, the electromagnetic coil unit 16 can be a brake coil (“DC field”) or a stirring coil (“AC field”).

After the coil unit(s) 16 has reached their operating position as explained, they are suitably energized in order to apply magnetic fields to a molten metal in the continuous casting mold or to induce magnetic fields in the molten metal.

• Bei der zweiten Ausführungsform der erfindungsgemäße Stranggießvorrichtung 10 ist vorgesehen, dass an der Stützrahmenkonstruktion 15 zwei elektromagnetische Spuleneinheiten 16, 17 vertikal übereinander angeordnet sind. Dies ist beispielsweise in der Seitenansicht von 7 zu erkennen, in der diese Spuleneinheiten 16, 17, analog zu den Darstellungen der ersten Ausführungsform von 3 und 4, jeweils in eine Betriebsposition gebracht sind.

Based on 5-7 A second embodiment is shown and explained below for the continuous casting device 10 according to the invention. In detail:

• In the second embodiment of the continuous casting device 10 according to the invention it is provided that two electromagnetic coil units 16, 17 are arranged vertically one above the other on the support frame structure 15. For example, this is in the side view of 7 can be seen in which these coil units 16, 17, analogous to the illustrations of the first th embodiment of 3 and 4 , each brought into an operating position.

In the same way as in the first embodiment, actuators are also provided in the second embodiment with which a translational movement, i.e. displacement of the coil unit(s) in the vertical direction (by means of the actuator 18) and in the horizontal direction (by means of the actuator 19) is possible is.

In the second embodiment of the continuous casting device 10, it can be provided that each of the two coil units 16, 17, which are arranged vertically one above the other, is assigned its own actuator 18. This makes it possible to move the two coil units 16, 17 independently of one another in the vertical direction if necessary and to set a desired predetermined vertical position for this purpose.

As already explained above, it is also provided for the continuous casting device 10 according to the invention according to the second embodiment to be equipped with a position detection system 20 with at least one sensor 21 and also with a processor unit 22. This is simplified in the 7 shown symbolically. With regard to the functionality of these components 20, 21 and 22, reference may be made to the explanations for the first embodiment in order to avoid repetition.

Corresponding to the coil units 16, 17 arranged vertically one above the other, in the second embodiment, window openings 24 adapted to them are formed in the outside 13 of the mold support frames 12a, 12b. This is best done in the perspective view of 5 to recognize.

In connection with the second embodiment of the continuous casting device 10 according to the invention, it should be noted that 5 , analogous to 3 in the first embodiment, which shows coil units 16, 17 in a rest position. In contrast, the coil units 16, 17 are shown in the illustration 6 in an operating position in which they have been moved translationally in the direction of the continuous casting mold 11 by actuating the actuator 19. This corresponds to the representation of 2 in the first embodiment.

In the second embodiment, on the one hand, the translational and horizontal movability of the coil units 16, 17, and on the other hand, their translational adjustment in the vertical direction, mutatis mutandis as in the first embodiment, so that reference is made to the explanations in this regard to avoid repetition.

The side view according to 7 shows further possible operating positions for the coil units, which are identified by the height parameter V ₃ and the two distance parameters H ₂ , H ₃ .

For example, in the second embodiment, the lower coil unit 17 can be adjusted in the vertical direction, which in 7 is symbolized by the double arrow marked “V”. Such a vertical adjustment of the coil unit 17 until it reaches a predetermined position can also take place when the coil unit 17 is already within the window opening 24 and has reached its predetermined position there in the horizontal direction, and / or also during the casting process and thus "On-line". This also applies in the same way to the upper coil unit 16.

Likewise, in the second embodiment, the coil units 16, 17 can also be moved translationally “online” in the horizontal direction, ie during the casting process. The different operating positions that can be set here are expressed, for example, by the different distance parameters H ₂ , H ₃ . As shown in the exemplary illustration in 7 The distance parameter H ₃ for the coil unit 17 on the fixed side of the continuous casting mold 11, ie in the window opening 24 of the mold support frame 12a, can be chosen to be larger than the distance parameter H ₂ for the coil unit 17 on the opposite side or on the loose side of the continuous casting mold 11 , ie in the window opening 24 of the mold support frame 12b.

In the second embodiment, with respect to the two coil units 16, 17 arranged vertically one above the other, it can be provided that the distance between them can also be varied with additional (not shown) optional actuating elements or screw drives. The distance between these coil units can be adjusted to predetermined values both in the vertical direction and in the horizontal direction in order to achieve the desired operating positions for the respective coil units 16, 17.

In the second embodiment of the continuous casting device 10 according to the invention, two coil units 16 can also be attached laterally next to one another on the support frame structure 15 in the same way as in the first embodiment. Four coil units 16, 17 are then provided on each side of the continuous casting mold 11, which are correspondingly positioned on the outside Window openings 24 formed on the sides 13 of the mold support frames 12a, 12b can be retracted to reach their respective operating position.

Alternatively, according to a modification of the second embodiment, it is also possible for only two coil units 16, 17 to be provided on each side of the continuous casting mold 11, which are arranged vertically one above the other as explained.

• - Die Einrichtung 14 (bzw. Hubwageneinheit) ist beiderseits der Stranggießkokille 11 vorgesehen, d.h. jeweils an beiden Seiten der Stranggießkokille 11 (vgl. 1, 5). Wie vorstehend erläutert, kann eine translatorische horizontale Bewegbarkeit bzw. Verschiebung der Einrichtung 14 in Verbindung mit einer daran angebrachten elektromagnetischen Spuleneinheit 16, 17 durch Lauf- oder Führungsräder 23 oder durch vergleichbare und gleichwirkende Gleitleisten oder dergleichen erreicht werden.
• - Die Aktuatoren 18, 19 können hydraulisch oder pneumatisch funktionieren, oder in Form einer Elektrospindel ausgebildet sein.
• - Falls zwei elektromagnetische Spuleneinheiten 16, 17 seitlich nebeneinander und/oder vertikal übereinander angeordnet sind, kann, je nach Bedarf und gewählter Produktionsparameter, eine dieser beiden Spuleneinheiten 16 in Form einer Bremsspule („DC-Field“) ausgebildet sein, wobei dann die andere der beiden elektromagnetischen Spuleneinheiten in Form einer Rührspule („AC-Field“) ausgebildet ist.
• - Die Spuleneinheiten 16, 17 und ggf. eine Mehrzahl hiervon und hierzu gehörende weitere Bauteile, wie beispielsweise ein den Magnetfluss leitendes Joch aus Stahl, sind in der Zeichnung auch mit einer gestrichelten Linie umrandet symbolisiert und jeweils mit „E“ bezeichnet.
• - Die Spuleneinheiten 16, 17 können als Einzelspuleneinheit oder, falls zwei Spulen seitlich nebeneinander oder vertikal übereinander angeordnet bzw. vorgesehen sind, als Doppelspuleneinheit ausgebildet sein.
• - Mittels der vorliegenden Erfindung ist es u.a. möglich, dass die Feldwirkung der elektromagnetischen Spuleneinheiten 16, 17 der Positionierung des Tauchausgusses optimiert folgen kann. Diesbezüglich erlauben die Mehrzahl von Aktuatoren 18, 19 Mehrere Aktuatoren (8,9) erlauben festseitig und losseitig der Stranggießkokille 11 eine optimierte Positionierung der Spuleneinheiten 16, 17 in verschiedenen Konfigurationen, im Hinblick auf jeweils verschiedenen Gießsituationen und Gießdicken (in 3 mit „S₁“ und in 7 mit „S₂ bezeichnet; allgemein: S').
• - Die Betriebsposition der Spuleneinheit(en) 16, 17 lassen sich schnell ändern, wobei durch diese schnelle Variation der Höhenparameter V_i (vgl. V₁-V₃ in den 3, 4, 7) als auch der Abstandsparameter H_i (siehe H₁-H₃ in den 3, 4, 7) verschiedene „Air Gaps“ für verschiedene Gießdicken bedarfsgerecht eingestellt werden können. Bei diesen „Air Gaps“ handelt sich um den horizontalen Abstand von gegenüberliegenden Spuleneinheiten 16, 17, die jeweils auf entgegengesetzten Seiten der Stranggießkokille 11 angeordnet sind. In den Seitenansichten von 3, 4 und 7 ist ein solcher horizontaler Abstand bzw. „Air Gap“ durch einen entsprechenden Bemaßungspfeil symbolisiert.

Finally, with regard to all of the above-explained embodiments of the invention, attention is drawn to the following aspects:

• - The device 14 (or lifting truck unit) is provided on both sides of the continuous casting mold 11, ie on both sides of the continuous casting mold 11 (cf. 1 , 5 ). As explained above, translational horizontal mobility or displacement of the device 14 can be achieved in conjunction with an electromagnetic coil unit 16, 17 attached thereto by running or guide wheels 23 or by comparable and equivalently acting slide strips or the like.
• - The actuators 18, 19 can function hydraulically or pneumatically, or can be designed in the form of an electrospindle.
• - If two electromagnetic coil units 16, 17 are arranged side by side and/or vertically one above the other, one of these two coil units 16 can be designed in the form of a brake coil (“DC field”), depending on requirements and the selected production parameters, in which case the other of the two electromagnetic coil units is designed in the form of a stirring coil (“AC field”).
• - The coil units 16, 17 and possibly a plurality of them and other components belonging to them, such as a steel yoke that conducts the magnetic flux, are also symbolized in the drawing with a dashed line and are each designated by “E”.
• - The coil units 16, 17 can be designed as a single coil unit or, if two coils are arranged or provided laterally next to one another or vertically one above the other, as a double coil unit.
• - By means of the present invention, it is possible, among other things, for the field effect of the electromagnetic coil units 16, 17 to follow the positioning of the immersion spout in an optimized manner. In this regard, the plurality of actuators 18, 19 allow several actuators (8, 9) on the fixed and loose sides of the continuous casting mold 11 to optimize the positioning of the coil units 16, 17 in different configurations, with regard to different casting situations and casting thicknesses (in 3 with “S ₁ ” and in 7 labeled “S ₂ ; generally: S').
• - The operating position of the coil unit(s) 16, 17 can be changed quickly, with this rapid variation of the height parameters V _i (see V ₁ -V ₃ in the 3 , 4 , 7 ) as well as the distance parameter H _i (see H ₁ -H ₃ in the 3 , 4 , 7 ) different “air gaps” can be set as required for different casting thicknesses. These “air gaps” are the horizontal distance between opposing coil units 16, 17, which are each arranged on opposite sides of the continuous casting mold 11. In the side views of 3 , 4 and 7 Such a horizontal distance or “air gap” is symbolized by a corresponding dimension arrow.

Reference symbol list

10

Continuous casting device

11

Continuous casting mold

12a

Mold support frame (fixed side)

12b

Mold support frame (loose side)

13

Outside (of the mold support frame 12a; 12b)

14

Facility (or “pallet truck unit”)

15

Support frame construction

16, 17

electromagnetic coil unit

18

Actuator (for vertical direction)

19

Actuator (for horizontal direction)

20

Path detection system

21

sensor

22

Processor unit

23

Running or guiding wheel

24

Window opening

GR

Pouring direction

E

Unit (comprising at least one coil unit 16, 17)

H

horizontal direction

v

vertical direction

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was 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 2011/151105 A1 [0003]
• JP 4274849 A [0004]

Claims (17)

Continuous casting device (10) for continuously casting a metal strand with a continuous casting mold (11) through which molten metal is passed during the casting process, comprising a device (14) with at least one electromagnetic coil unit (16; 17) for applying magnetic fields to the melt the continuous casting mold (11), wherein the device (14) is arranged laterally from the continuous casting mold (11) and the device (14) with the electromagnetic coil unit (16; 17) can be moved translationally and horizontally in the direction of the continuous casting mold (11) or away from it is, characterized in that the electromagnetic coil unit (16; 17) is translationally movable in the horizontal direction (H) and in the vertical direction (V). Continuous casting device (10). Claim 1 , characterized in that the device (14) has a support frame structure (15) on which the at least one electromagnetic coil unit (16; 17) is attached in an at least vertically displaceable manner, at least one actuator (18) being provided on the support frame structure (15). , which is in operative connection with the electromagnetic coil unit (16; 17) and with which the electromagnetic coil unit (16; 17) can be moved translationally in the vertical direction (V). Continuous casting device (10). Claim 2 , characterized in that at least one electromagnetic coil unit (16; 17) is attached to the support frame structure (15) in such a way that it interacts with an actuator (19) and when actuated translationally in the horizontal direction (H) in the direction of the continuous casting mold ( 11) or can be moved away from it. Continuous casting device (10). Claim 2 or 3 , characterized in that two electromagnetic coil units (16; 17) are mounted on the support frame structure (15) in a vertically displaceable manner, preferably independently of one another, with actuators (18; 19) being provided on the support frame structure (15), which are connected to a respective electromagnetic coil unit ( 16; 17) are in operative connection and with which a respective electromagnetic coil unit (16; 17) can be moved translationally in the horizontal direction (H) and in the vertical direction (V). Continuous casting device (10). Claim 4 , characterized in that the two electromagnetic coil units (16; 17) are arranged vertically one above the other on the support frame structure (15). Continuous casting device (10). Claim 4 or 5 , characterized in that both electromagnetic coil units (16; 17) are attached to the support frame structure (15) in such a way that they interact with a respective associated actuator (19) and, when actuated, preferably independently of one another, also in the horizontal direction (H) translationally can be moved in the direction of the continuous casting mold (11) or away from it. Continuous casting device (10) according to one of the preceding claims, characterized by a position detection system (20) with at least one sensor (21), with which a position of at least one electromagnetic coil unit (16; 17) in the horizontal direction (H) and / or in the vertical Direction (V) can be determined relative to the adjacent continuous casting mold (11). Continuous casting device (10). Claim 7 , characterized by a processor unit (22) which is in signal connection both with the position detection system (20) and with an actuator (18; 19) for displacing at least one electromagnetic coil unit (16; 17), the actuator (18; 19 ) can be controlled by means of the processor unit (22) depending on a signal from the position detection system (20) and a position of the electromagnetic coil unit (16; 17) determined thereby, so that the position of the electromagnetic coil unit (16; 17) relative to the one adjacent to it Continuous casting mold (11) can be adjusted in the horizontal and / or vertical direction (V) to a predetermined value or distance. Continuous casting device (10) according to one of the preceding claims, characterized in that on an outside (13) of a mold support frame (12a; 12b) for the continuous casting mold (11) and opposite the device (14) with at least one electromagnetic coil unit (16; 17) at least one window opening (24) is formed, which is adapted to the external dimensions of the electromagnetic coil unit (s) (16; 17) in such a way that the coil unit (s) (16; 17) can be inserted within the window opening (24). ) from the horizontal direction (H) and / or moving the coil units (16; 17) in the vertical direction (V) is possible. Continuous casting device (10) according to one of the preceding claims, characterized in that the electromagnetic coil unit (16; 17) is a brake coil (DC field) or a stirring coil (AC field). Continuous casting device (10) according to one of the Claims 3 until 10 , characterized , that both electromagnetic coil units (16; 17) are each designed in the form of a brake coil (DC field) or in the form of a stirring coil (AC field). Continuous casting device (10) according to one of the Claims 3 until 10 , characterized in that one of the two electromagnetic coil units (16; 17) is designed in the form of a brake coil (DC field) and the other of the two electromagnetic coil units (17; 16) is designed in the form of a stirring coil (AC field). Method for the continuous casting of a metal strand using a continuous casting device (10), in particular according to one of Claims 1 until 12 , in which molten metal is passed through the continuous casting mold (11) during the casting process and magnetic fields are applied to the melt in the continuous casting mold (11) by means of at least one electromagnetic coil unit (16; 17), characterized in that the electromagnetic coil unit (16; 17) is moved translationally in the horizontal direction (H) and/or in the vertical direction (V) during the continuous casting process relative to the adjacent continuous casting mold (11) in order to thereby determine the position of the coil unit (16; 17) relative to the continuous casting mold (11). to set a predetermined value or distance. Procedure according to Claim 13 , characterized in that a position of the electromagnetic coil relative to the adjacent continuous casting mold (11) is continuously monitored, the position of the electromagnetic coil relative to the adjacent continuous casting mold being determined by actuating an actuator (18) to which the electromagnetic coil is operatively connected (11) is set to a predetermined value or distance in the horizontal direction (H) and/or in the vertical direction (V). Procedure according to Claim 13 or 14 , characterized in that two electromagnetic coil units (16; 17) are used to apply magnetic fields to the melt in the continuous casting mold (11), with a distance between these two coil units (16; 17) relative to one another or relative to the adjacent continuous casting mold (11 ) is set translationally in the horizontal direction (H) and / or in the vertical direction (V) to a respective predetermined value. Procedure according to one of the Claims 13 until 15 , characterized in that the horizontal and/or vertical translational movement of at least one electromagnetic coil unit (16; 17) takes place during the casting of a metal strand. Procedure according to Claim 16 , characterized in that the movement of at least one electromagnetic coil unit (16; 17) takes place in such a way that a continuous adjustment to the filling level and / or to the immersion depth of an immersion tube of the continuous casting mold (11) is carried out.

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