EP1991379B1 - Continuous casting plant and method of operating a continuous casting plant - Google Patents
Continuous casting plant and method of operating a continuous casting plant Download PDFInfo
- Publication number
- EP1991379B1 EP1991379B1 EP07723100.9A EP07723100A EP1991379B1 EP 1991379 B1 EP1991379 B1 EP 1991379B1 EP 07723100 A EP07723100 A EP 07723100A EP 1991379 B1 EP1991379 B1 EP 1991379B1
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- EP
- European Patent Office
- Prior art keywords
- strip
- continuous casting
- casting plant
- driving
- strand
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
- B22D11/1282—Vertical casting and curving the cast stock to the horizontal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/043—Curved moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/14—Plants for continuous casting
- B22D11/142—Plants for continuous casting for curved casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/20—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes with supporting couples provided by walls of buildings or like structures
- B66C23/201—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes with supporting couples provided by walls of buildings or like structures with supporting couples provided from above, e.g. by ceilings of buildings
Definitions
- the invention relates to a continuous casting plant, in particular for continuous casting of thin slabs, which has a vertically disposed below a mold strand guide, wherein below the strand guide means for driving the cast strand and bending thereof are arranged in the horizontal. Furthermore, the invention relates to a method for operating a continuous casting plant.
- Starting point for this type of continuous casting plants are sheet plants or vertical turning plants with a casting radius usually between seven and twelve meters for larger casting thicknesses, in which the strand is bent or directed with liquid core.
- CSP C ompact S P roduction trip
- a thickness usually between 45 and 70 mm, occasionally up to 90 mm is.
- the design of the vertical plant is widespread, in which the cast strand is bent and directed only after the solidification.
- An advantage of the CSP systems is that the design of the system can be kept simple, especially regarding the strand guide. For example, in a strand breakthrough below the mold, the mold and the affected strand guide elements can be removed or replaced with a crane upwards. The cost of the change and thus the loss of production here are much lower than when using conventional arc segments that can not be upgraded.
- a further advantage is that the strand is not bent or straightened until its final solidification. Therefore, the strand elongations are smaller; it is not to be feared that the sensitive inner side of the strand ruptures.
- Fig. 1 Such a prior art continuous casting plant 1 is shown. From a mold 2, cast steel passes vertically downwards, the strand 6 thus produced being guided along a strand guide 3. Until the strand 6 leaves the strand guide 3 down, it is essentially solidified. It passes below the strand guide 3 in an area which are equipped with means 4, 5 for the combined driving and bending of the strand 6. To recognize are in the conveying direction of the strand 6, first two bending drivers that drive the strand 6 both in the conveying direction than apply it also with bending forces. The rollers of the bending driver 4, 5 are provided by moving means 11. The following rollers bend the strand 6 further in the direction of the horizontal H. Finally, the strand 6 leaves the system in the horizontal direction H to corresponding downstream devices. Only schematically illustrated is the cooling chamber 12 for cooling the strand 6.
- the available height of the strand guide it is desirable for the available height of the strand guide to be as large as possible and - for a given system height - the height of the bend of the strand to be as small as possible. Then that is the maximum way for the solidification of the strand before along the strand guide 3 before.
- the object of the present invention to develop a continuous casting of the type mentioned above and to provide a corresponding method for operating a continuous casting that it is possible, the maximum height of the strand guide at the smallest height for driving, bending and straightening the cast Strand to use.
- the range of driving and bending should therefore be shortened in favor of a prolonged strand management.
- the solution of this object by the invention is device technology characterized in that below the lower end of the strand guide of the continuous casting a means for exclusively driving the cast strand and below the means for driving a means for exclusively bending the cast strand is arranged.
- the means for exclusively driving the cast strand has at least one pair of rollers, which along the direction transverse to the conveying direction of the strand a plurality of successive and mounted by center bearings part rolls.
- the means for exclusively driving the cast strand preferably consists only of a single pair of driven rollers. Only a single pair of rollers has proven sufficient and saves height for the driver, in favor of strand leadership.
- the means for exclusively driving the cast strand are fastened to a segment frame situated above this means, preferably releasably (eg by a screw connection) is.
- a segment frame situated above this means preferably releasably (eg by a screw connection) is.
- the means for exclusively driving the cast strand is housed according to a very advantageous development, at least partially in a cassette which is arranged detachably in the continuous casting.
- the at least one pair of rollers is completely housed in the cassette.
- At least one roller of the roller pair or the roller pair can be moved in total via a moving means in the direction normal to the surface of the strand.
- a moving means in the direction normal to the surface of the strand.
- the role of the fixed side can be moved by hydraulic cylinders.
- the said movement may be required both to place the driver just below the strand guide and in alignment with the casting strand.
- this movement means but also a loading of the rollers carried on the strand surface.
- the rollers of the means for driving the strand can be subjected to force, optionally via separate force-generating elements, in the direction normal to the surface of the strand.
- the required contact force is generated, which is necessary for the transmission of a conveying movement.
- the force generating elements can be supported on the framework of the continuous casting plant or on a component firmly connected thereto. But it is possible that the force-generating elements are supported on the cassette.
- the cylinders for pressing the driver rollers to the strand can thus be fixed alternatively in the cassette or on the mainland, in particular in the cooling chamber of the continuous casting plant.
- the cylinder can be flanged to the cassette. This results in the advantage that without a cylinder, the driver cartridge fits through the tightly inserted 4-eccentric oscillation frame, which facilitates assembly and disassembly.
- the continuous casting plant further comprises a cooling chamber - as it is usual, as is said - and the means for exclusively driving the cast strand is arranged in the cooling chamber. It can be provided in particular that the lower bottom of the cooling chamber extends below the means for driving the cast strand and above the means for bending the cast strand.
- the method for operating such a continuous casting plant, in particular for producing thin slabs is characterized in that the cast strand is first guided vertically down through the strand guide and then the strand below the lower end of the strand guide by means of exclusively driving the strand is downwardly conveyed, wherein the strand is then bent by a means for exclusively bending the strand from the vertical to the horizontal.
- the strand is preferably cooled in the region below the strand guide up to its outlet into the horizontal only in the region of the means for exclusive driving.
- the means for driving therefore only serve to drive the hot and cold strand.
- the means for bending only perform the functions of bending the strand, separating the hot strand from the cold strand, driving the dummy strand and supporting the hot strand.
- the strand In the field of strand guidance, the strand is not conveyed by driven rollers.
- the promotion is carried out exclusively by means of exclusive activity.
- the driver cassette By accommodating the means for driving only in a cassette and placing the cassette in the cooling chamber, the driver cassette can be changed up like a segment of the strand guide through the opening of the oscillating frame. This is easier and faster possible than the horizontal change of the individual driver roles, as has been done so far.
- the bending roller does not always have to be changed together with the driver role. This is advantageous because the driver rollers are subject to higher wear. It can be done with the solution according to the invention proposal rather needs a change of roles of drivers (especially by changing the vertical cartridge) and benders (namely by horizontal change of bending rollers). Furthermore, the driver cartridge can be changed as needed, regardless of the segments arranged above the strand guide.
- the driver rolls are thus in the proposed solution before the strand arc.
- the additional space for the strand guide is obtained by reducing the diameter of the preferably multiply divided rollers and by reducing the distances, in particular also by the fact that the driver rollers are arranged in the cooling chamber.
- the bending forces are absorbed by the driver rollers and do not get into the strand guide.
- the bending segment can be expanded upwards like the strand guide segments.
- FIGS. 2 and 3 is in synopsis the previously known solution according to Fig. 1 (in Fig. 2 ) and an inventive embodiment of a continuous casting 1 (in Fig. 3 to see). It can be seen first that at the same height of the plant, the length of the strand guide 3 below the mold 2 in the new solution is greater, whereby the above advantages are achieved. In the exemplary embodiment results in a 1,000 mm longer strand guide. This is achieved by immediately below the strand guide 3, a means 4 for exclusively driving the strand 6 is arranged, below which there is a means 5 for exclusively bending the strand 6. It is therefore - in contrast to the previously known solutions - no bending driver for the combined driving and bending of the strand longer available.
- the bending radius is also between 2.5 and 3.5 meters, making it significantly smaller than in bowing machines or vertical turn-off systems.
- Fig. 4 shows, only a single pair of rollers 7, 8 in the means 4 for exclusively driving the strand 6 is present. Still goes out Fig. 4 clearly shows that the cooling chamber 12 is placed here so that the means 4 are arranged above the bottom 13 of the cooling chamber 12, wherein the means 5 are positioned below the bottom 13, ie outside the cooling chamber.
- Fig. 5 results, the entire deflection of the strand 6 from the vertical V in the horizontal H free of means for driving. Only after the strand 6 has substantially reached the horizontal H, driver or rolling stands 14 are present. This means that the strand 6 from the strand guide 3, in which there are no driven rollers themselves, are expelled only by the means 4 and no further drivers are present until the deflection of the strand 6 into the horizontal H.
- FIGS. 6 and 7 are still some details of the means 4 for exclusively driving the strand 6 shown. Shown is the lowest part of the strand guide 3, below which immediately connect the means 4 for driving. Only indicated are the rollers 7 and 8 of the means 4, that is, the rollers of the single pair of rollers in the means 4th
- rollers 7, 8 are basically constructed in the same way as the rollers 15, 16 of the strand guide 3 to be seen above.
- the rolls of the strand guide consist of several sub-rolls 15 ', 15 ", 15” arranged transversely to the strand 6 in the direction Q transverse to one another. or 16 ', 16 ", 16"'.
- the roles are supported by center bearings 9. This results in the possibility that the diameter of the rollers can be made smaller without having to accept disadvantages with respect to the deflection of the rollers. While usually rollers with a diameter of about 300 to 420 mm are common, can be used hereby rolls having a diameter of less than 300 mm. The higher (bending) forces in the rollers due to the smaller distances are easily absorbed by the center bearings 9.
- the rollers 7, 8 of the means 4 are housed in a cassette 10.
- This cassette can be assembled and disassembled as a whole.
- the adjustment of the position of the rollers 7, 8 takes place with means of movement 11, of which only one is shown in the form of a hydraulic piston-cylinder system.
- the productivity of the continuous casting machine can be substantially increased. It is also possible to set the system faster to other production conditions or to assemble and disassemble components of the system.
- the mentioned extension of the strand guide by 1,000 millimeters provided the opportunity to work with a higher casting speed, wherein in one embodiment a casting speed of up to 6 m / min was achieved.
- the thickness of the strand was in the range between 52 and 62 mm.
- the productivity could be increased by more than 10%.
- the said vertical change possibility by the Oszillationsrahmen has proved to be particularly advantageous.
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Description
Die Erfindung betrifft eine Stranggießanlage, insbesondere zum Stranggießen von Dünnbrammen, die eine unterhalb einer Kokille angeordnete vertikal ausgerichtete Strangführung aufweist, wobei unterhalb der Strangführung Mittel zum Treiben des gegossenen Strangs und Biegen desselben in die Horizontale angeordnet sind. Des Weiteren betrifft die Erfindung ein Verfahren zum Betreiben einer Stranggießanlage.The invention relates to a continuous casting plant, in particular for continuous casting of thin slabs, which has a vertically disposed below a mold strand guide, wherein below the strand guide means for driving the cast strand and bending thereof are arranged in the horizontal. Furthermore, the invention relates to a method for operating a continuous casting plant.
Stranggießanlagen der genannten Art sind im Stand der Technik hinlänglich bekannt.Continuous casting of the type mentioned are well known in the art.
Ausgangspunkt für diese Art von Stranggießanlagen sind Bogenanlagen oder Senkrecht-Abbiegeanlagen mit einem Gießradius meist zwischen sieben und zwölf Metern für größere Gießdicken, bei denen der Strang mit flüssigem Kern gebogen bzw. gerichtet wird.Starting point for this type of continuous casting plants are sheet plants or vertical turning plants with a casting radius usually between seven and twelve meters for larger casting thicknesses, in which the strand is bent or directed with liquid core.
Unter der Bezeichnung "CSP" (Compact Strip Production) ist ein Stranggießprozess für Dünnbrammen bekannt, deren Dicke meist zwischen 45 und 70 mm, gelegentlich auch bis 90 mm, beträgt. Hier ist die Bauform der Senkrechtanlage verbreitet, bei der der gegossene Strang erst nach der Durcherstarrung gebogen und gerichtet wird. Vorteilhaft bei den CSP-Anlagen ist, dass die Konstruktion der Anlage einfach gehalten werden kann, insbesondere betreffend die Strangführung. Beispielsweise bei einem Strangdurchbruch unterhalb der Kokille können die Kokille und die betroffenen Strangführungselemente mit einem Kran nach oben ausgebaut bzw. ausgetauscht werden. Der Aufwand für den Wechsel und damit der Produktionsausfall sind hier wesentlich geringer als beim Einsatz üblicher Bogensegmente, die nicht nach oben ausgebaut werden können.The term "CSP" (C ompact S P roduction trip) is a continuous casting process for thin slabs is known, having a thickness usually between 45 and 70 mm, occasionally up to 90 mm, is. Here, the design of the vertical plant is widespread, in which the cast strand is bent and directed only after the solidification. An advantage of the CSP systems is that the design of the system can be kept simple, especially regarding the strand guide. For example, in a strand breakthrough below the mold, the mold and the affected strand guide elements can be removed or replaced with a crane upwards. The cost of the change and thus the loss of production here are much lower than when using conventional arc segments that can not be upgraded.
Vorteilhaft ist weiterhin, dass der Strang bis zu seiner Enderstarrung nicht gebogen bzw. gerichtet wird. Daher sind die Strangdehnungen geringer; es ist nicht zu befürchten, dass die empfindliche Innenseite des Strangs aufreißt.A further advantage is that the strand is not bent or straightened until its final solidification. Therefore, the strand elongations are smaller; it is not to be feared that the sensitive inner side of the strand ruptures.
In
Im Sinne der obigen Erläuterungen ist es wünschenswert, dass die zur Verfügung stehende Höhe der Strangführung möglichst groß und - bei vorgegebener Anlagenhöhe - die Höhe der Umbiegung des Strangs möglichst klein ist. Dann nämlich liegt der maximale Weg für die Durcherstarrung des Strangs vor entlang der Strangführung 3 vor.For the purposes of the above explanations, it is desirable for the available height of the strand guide to be as large as possible and - for a given system height - the height of the bend of the strand to be as small as possible. Then that is the maximum way for the solidification of the strand before along the
Daher ist es die Aufgabe der vorliegenden Erfindung, eine Stranggießvorrichtung der eingangs genannten Art so weiterzubilden und ein entsprechendes Verfahren zum Betrieben einer Stranggießanlage zu schaffen, dass es möglich wird, die größtmögliche Höhe der Strangführung bei kleinster Höhe für das Treiben, Biegen und Richten des gegossenen Strang zu nutzen. Der Bereich des Treibens und Biegens soll also zu Gunsten einer verlängerten Strangführung verkürzt werden. Ferner soll eine möglichst günstige Möglichkeit geschaffen werden, um im Falle von Störungsbeseitigungen bzw. von Reparatur- und Instandhaltungsarbeiten ein möglichst effizientes und schnelles Arbeiten zu ermöglichen. Durch die Verlängerung der Strangführung soll eine wesentliche Erhöhung der Produktivität der Anlage erreicht werden.Therefore, it is the object of the present invention to develop a continuous casting of the type mentioned above and to provide a corresponding method for operating a continuous casting that it is possible, the maximum height of the strand guide at the smallest height for driving, bending and straightening the cast Strand to use. The range of driving and bending should therefore be shortened in favor of a prolonged strand management. Furthermore, the best possible way to create in order to facilitate the most efficient and rapid work in the event of troubleshooting or repair and maintenance work. By extending the strand guide a substantial increase in the productivity of the system should be achieved.
Die Lösung dieser Aufgabe durch die Erfindung ist vorrichtungstechnisch dadurch gekennzeichnet, dass unterhalb des unteren Endes der Strangführung der Stranggießanlage ein Mittel zum ausschließlichen Treiben des gegossenen Strangs und unterhalb des Mittels zum Treiben ein Mittel zum ausschließlichen Biegen des gegossenen Strangs angeordnet ist.The solution of this object by the invention is device technology characterized in that below the lower end of the strand guide of the continuous casting a means for exclusively driving the cast strand and below the means for driving a means for exclusively bending the cast strand is arranged.
Erfindungsgemäß wird also das vorbekannte kombinierte Mittel zum Treiben einerseits und zum Biegen andererseits - also der "Biegetreiber" - in separate Elemente unterteilt. Wie noch zu sehen sein wird, ergeben sich damit nicht nur spezifische Vorteile, auch die obige Aufgabe wird hierdurch gelöst.According to the invention, therefore, the previously known combined means for driving on the one hand and for bending on the other - ie the "bending driver" - divided into separate elements. As will be seen, this not only gives specific advantages, but also the above object is achieved by this.
Vorzugsweise ist vorgesehen, dass das Mittel zum ausschließlichen Treiben des gegossenen Strangs mindestens ein Rollenpaar aufweist, das entlang der zur Förderrichtung des Strangs quer verlaufenden Richtung mehrere aufeinander folgende und durch Mittenlagerungen gelagerte Teilrollen aufweist. Hierdurch wird in vorteilhafter Weise erreicht, dass hinsichtlich des Durchmessers kleinere Rollen als bislang üblich für den Treiber eingesetzt werden können. Dies verringert die für den Treiber benötigte Bauhöhe.It is preferably provided that the means for exclusively driving the cast strand has at least one pair of rollers, which along the direction transverse to the conveying direction of the strand a plurality of successive and mounted by center bearings part rolls. As a result, it is advantageously achieved that, with regard to the diameter, smaller rolls than hitherto customary can be used for the driver. This reduces the height required for the driver.
Das Mittel zum ausschließlichen Treiben des gegossenen Strangs besteht dabei vorzugsweise nur aus einem einzigen Paar angetriebener Rollen. Nur ein einziges Rollenpaar hat sich aus ausreichend herausgestellt und spart Höhe für den Treiber ein, zu Gunsten der Strangführung.The means for exclusively driving the cast strand preferably consists only of a single pair of driven rollers. Only a single pair of rollers has proven sufficient and saves height for the driver, in favor of strand leadership.
Ferner kann vorgesehen werden, dass das Mittel zum ausschließlichen Treiben des gegossenen Strangs an einem sich oberhalb dieser Mittel befindlichen Segmentrahmen vorzugsweise lösbar (z. B. durch eine Verschraubung) befestigt ist. Mit dieser Ausgestaltung ist es möglich, eine Versteifung der Strangführung zu erreichen. Weiterhin wird dadurch ein vereinfachtes Wechseln der Mittel möglich.It can further be provided that the means for exclusively driving the cast strand are fastened to a segment frame situated above this means, preferably releasably (eg by a screw connection) is. With this embodiment, it is possible to achieve a stiffening of the strand guide. Furthermore, this makes a simplified change of funds possible.
Das Mittel zum ausschließlichen Treiben des gegossenen Strangs ist gemäß einer sehr vorteilhaften Weiterbildung zumindest teilweise in einer Kassette untergebracht, die lösbar in der Stranggießanlage angeordnet ist. Bevorzugt ist das mindestens eine Rollenpaar vollständig in der Kassette untergebracht.The means for exclusively driving the cast strand is housed according to a very advantageous development, at least partially in a cassette which is arranged detachably in the continuous casting. Preferably, the at least one pair of rollers is completely housed in the cassette.
Dabei kann vorgesehen sein, dass mindestens eine Rolle des Rollenpaars bzw. auch das Rollenpaar insgesamt über ein Bewegungsmittel in Richtung normal zur Oberfläche des Strangs bewegt werden kann. Von den Rollen kann auch nur eine mittels der Bewegungsmittel bewegbar sein, z. B. kann die Rolle der Festseite per Hydraulikzylinder bewegbar sein.It can be provided that at least one roller of the roller pair or the roller pair can be moved in total via a moving means in the direction normal to the surface of the strand. Of the roles only one can be moved by means of the movement means, for. B., the role of the fixed side can be moved by hydraulic cylinders.
Die genannte Bewegung kann sowohl erforderlich sein, um den Treiber genau unterhalb der Strangführung und fluchtend mit dem Gießstrang zu platzieren. Gegebenenfalls kann mit diesem Bewegungsmittel aber auch eine Beaufschlagung der Rollen auf die Strangoberfläche erfolgen.The said movement may be required both to place the driver just below the strand guide and in alignment with the casting strand. Optionally, with this movement means but also a loading of the rollers carried on the strand surface.
Die Rollen des Mittels zum Treiben des Strangs können jedenfalls über gegebenenfalls separate Krafterzeugungselemente in Richtung normal zur Oberfläche des Strangs kraftbeaufschlagt werden. Hierdurch wird die erforderliche Anpresskraft erzeugt, die zur Übertragung einer Förderbewegung nötig ist. Dabei können sich die Krafterzeugungselemente am Gerüst der Stranggießanlage oder an einem mit diesem fest verbundenen Bauteil abstützen. Es ist aber möglich, dass sich die Krafterzeugungselemente an der Kassette abstützen.In any case, the rollers of the means for driving the strand can be subjected to force, optionally via separate force-generating elements, in the direction normal to the surface of the strand. As a result, the required contact force is generated, which is necessary for the transmission of a conveying movement. In this case, the force generating elements can be supported on the framework of the continuous casting plant or on a component firmly connected thereto. But it is possible that the force-generating elements are supported on the cassette.
Die Zylinder zum Andrücken der Treiberrollen an den Strang können also alternativ in der Kassette oder auf dem Festland, insbesondere in der Kühlkammer der Stranggießanlage, befestigt werden. Zum Wechseln der Kassette können die Zylinder an der Kassette angeflanscht sein. Hieraus ergibt sich der Vorteil, dass ohne Zylinder die Treiberkassette durch den üblicherweise eingesetzten engen 4-Exzenter-Oszillationsrahmen passt, was die Montage und Demontage erleichtert.The cylinders for pressing the driver rollers to the strand can thus be fixed alternatively in the cassette or on the mainland, in particular in the cooling chamber of the continuous casting plant. To change the cassette, the cylinder can be flanged to the cassette. This results in the advantage that without a cylinder, the driver cartridge fits through the tightly inserted 4-eccentric oscillation frame, which facilitates assembly and disassembly.
Vorzugsweise ist vorgesehen, dass die Stranggießanlage weiterhin eine Kühlkammer aufweist - wie es, wie gesagt, üblich ist - und das Mittel zum ausschließlichen Treiben des gegossenen Strangs in der Kühlkammer angeordnet ist. Dabei kann insbesondere vorgesehen werden, dass der untere Boden der Kühlkammer unterhalb der Mittel zum Treiben des gegossenen Strangs und oberhalb der Mittel zum Biegen des gegossenen Strangs verläuft.It is preferably provided that the continuous casting plant further comprises a cooling chamber - as it is usual, as is said - and the means for exclusively driving the cast strand is arranged in the cooling chamber. It can be provided in particular that the lower bottom of the cooling chamber extends below the means for driving the cast strand and above the means for bending the cast strand.
Das Verfahren zum Betreiben einer solchen Stranggießanlage, insbesondere zum Herstellen von Dünnbrammen, zeichnet sich dadurch aus, dass der gegossene Strang zunächst vertikal nach unten durch die Strangführung geführt wird und dass der Strang dann unterhalb des unteren Endes der Strangführung durch Mittel zum ausschließlichen Treiben des Strangs nach unten gefördert wird, wobei der Strang dann durch ein Mittel zum ausschließlichen Biegen des Strangs von der Vertikalen in die Horizontale umgebogen wird.The method for operating such a continuous casting plant, in particular for producing thin slabs, is characterized in that the cast strand is first guided vertically down through the strand guide and then the strand below the lower end of the strand guide by means of exclusively driving the strand is downwardly conveyed, wherein the strand is then bent by a means for exclusively bending the strand from the vertical to the horizontal.
Dabei ist bevorzugt vorgesehen, dass im Biegebereich des Strangs von der Vertikalen bis in die Horizontale kein Fördern des Strangs erfolgt. Dies soll erst wieder nach der weitgehenden Umbiegung in die Horizontale erfolgen.It is preferably provided that in the bending region of the strand from the vertical to the horizontal no conveying of the strand takes place. This should be done again after the extensive bend in the horizontal.
Der Strang wird dabei vorzugsweise im Bereich unterhalb der Strangführung bis zu seinem Auslauf in die Horizontale nur im Bereich der Mittel zum ausschließlichen Treiben gekühlt.The strand is preferably cooled in the region below the strand guide up to its outlet into the horizontal only in the region of the means for exclusive driving.
Mit der vorgeschlagenen Anlage bzw. mit dem vorgeschlagenen Verfahren werden verschiedene Vorteile erreicht.With the proposed system and the proposed method, various advantages are achieved.
Es erfolgt eine Separierung der zumeist heute gebräuchlichen zwei oder vier Treiber-Rollen des Biegetreibers in die genannten Mittel zum ausschließlichen Treiben und ausschließlichen Biegen. Damit kann Bauhöhe der Anlage gespart werden, wie sich aus den nachstehenden Erläuterungen ergibt. Die Mittel zum Treiben dienen daher nur noch zum Antreiben des Warm- und Kaltstrangs. Die Mittel zum Biegen führen nur noch die Funktionen Abbiegen des Strangs, Trennen des Warmstrangs vom Kaltstrang, Antreiben des Kaltstrangs und Stützen des Warmstrangs aus.There is a separation of the usually used today two or four driver roles of the bending driver in the said means for exclusive Drifting and exclusive bending. This height of the system can be saved, as can be seen from the following explanations. The means for driving therefore only serve to drive the hot and cold strand. The means for bending only perform the functions of bending the strand, separating the hot strand from the cold strand, driving the dummy strand and supporting the hot strand.
Im Bereich der Strangführung wird der Strang nicht durch angetriebene Rollen gefördert. Die Ausförderung erfolgt ausschließlich durch die Mittel zum ausschließlichen Treiben.In the field of strand guidance, the strand is not conveyed by driven rollers. The promotion is carried out exclusively by means of exclusive activity.
Durch das Unterbringen der Mittel zum ausschließlichen Treiben in einer Kassette und das Anordnen der Kassette in der Kühlkammer kann die Treiber-Kassette wie ein Segment der Strangführung durch die Öffnung des Oszillationsrahmens nach oben gewechselt werden. Dies ist einfacher und schneller möglich als das horizontale Wechseln der einzelnen Treiberrollen, wie es bislang erfolgt.By accommodating the means for driving only in a cassette and placing the cassette in the cooling chamber, the driver cassette can be changed up like a segment of the strand guide through the opening of the oscillating frame. This is easier and faster possible than the horizontal change of the individual driver roles, as has been done so far.
Beim Einsatz von Rollen mit geringerem Durchmesser im Treiber wird ebenfalls Bauhöhe gespart. Realisiert werden kann dies durch mehrere nebeneinander angeordnete Teilrollen mit Mittenlagerungen.When using rollers with a smaller diameter in the driver also height is saved. This can be realized by several juxtaposed sub-rollers with center bearings.
Sehr vorteilhaft ist des weiteren, dass bei der vorgeschlagenen Lösung die Biegerolle nicht stets gemeinsam mit der Treiberrolle gewechselt werden muss. Dies ist deshalb von Vorteil, weil die Treiberrollen einem höheren Verschleiß unterliegen. Es kann mit der Lösung gemäß dem Erfindungsvorschlag vielmehr bedarfsgerecht ein Wechsel der Rollen von Treiber (insbesondere durch vertikales Wechseln der Kassette) und Bieger (namentlich durch horizontalen Wechsel der Biegerollen) erfolgen. Weiterhin kann die Treiberkassette nach Bedarf unabhängig von den darüber angeordneten Segmenten der Strangführung gewechselt werden.It is also very advantageous that in the proposed solution, the bending roller does not always have to be changed together with the driver role. This is advantageous because the driver rollers are subject to higher wear. It can be done with the solution according to the invention proposal rather needs a change of roles of drivers (especially by changing the vertical cartridge) and benders (namely by horizontal change of bending rollers). Furthermore, the driver cartridge can be changed as needed, regardless of the segments arranged above the strand guide.
Die Treiberrollen befinden sich also bei der vorgeschlagenen Lösung vor dem Strangbogen. Der zusätzliche Raum für die Strangführung wird durch die Reduzierung des Durchmessers der vorzugsweise mehrfach geteilten Rollen und durch Verringerung der Abstände gewonnen, insbesondere auch dadurch, dass die Treiberrollen in der Kühlkammer angeordnet sind.The driver rolls are thus in the proposed solution before the strand arc. The additional space for the strand guide is obtained by reducing the diameter of the preferably multiply divided rollers and by reducing the distances, in particular also by the fact that the driver rollers are arranged in the cooling chamber.
Damit ist es möglich, den Strang bis zur Enderstarrung nicht zu biegen und zu richten, was die Innenqualität des Strangs erhöht.This makes it possible not to bend and straighten the strand until solidification, which increases the internal quality of the strand.
Die Biegekräfte werden von den Treiberrollen aufgenommen und gelangen nicht in die Strangführung.The bending forces are absorbed by the driver rollers and do not get into the strand guide.
Das Biegesegment kann wie die Strangführungssegmente nach oben ausgebaut werden.The bending segment can be expanded upwards like the strand guide segments.
In der Zeichnung sind Ausführungsbeispiele gemäß dem Stand der Technik und gemäß der Erfindung dargestellt.In the drawings, exemplary embodiments according to the prior art and according to the invention are shown.
Es zeigen:
- Fig. 1
- die Seitenansicht einer Stranggießanlage nach dem Stand der Technik,
- Fig. 2
- nochmals die Seitenansicht gemäß
Fig. 1 und in - Fig. 3
- daneben die Seitenansicht einer Stranggießanlage gemäß der Erfindung,
- Fig. 4
- die Seitenansicht einer Stranggießanlage gemäß der Erfindung mit dargestellter Kühlkammer,
- Fig. 5
- einen vergrößerten Ausschnitt aus der Stranggießanlage gemäß
Fig. 3 , - Fig. 6
- in vergrößerter Ansicht das untere Ende der Strangführung der Stranggießanlage mit sich anschließenden Mitteln zum ausschließlichen Treiben des Stranges und
- Fig. 7
- in perspektivischer Ansicht die in
Fig. 6 gezeigte Einheit.
- Fig. 1
- the side view of a continuous casting machine according to the prior art,
- Fig. 2
- again the side view according to
Fig. 1 and in - Fig. 3
- next to it the side view of a continuous casting plant according to the invention,
- Fig. 4
- the side view of a continuous casting plant according to the invention with illustrated cooling chamber,
- Fig. 5
- an enlarged section of the continuous casting according to
Fig. 3 . - Fig. 6
- in an enlarged view, the lower end of the strand guide of the continuous casting with adjoining means for exclusively driving the strand and
- Fig. 7
- in perspective view the in
Fig. 6 shown unit.
In
Wie bei Senkrechtanlagen bekannt, liegt auch hier der Biegeradius im Bereich zwischen 2,5 bis 3,5 Metern, er ist damit deutlich kleiner als bei Bogenanlagen bzw. Senkrecht-Abbiegeanlagen.As is the case with vertical installations, the bending radius is also between 2.5 and 3.5 meters, making it significantly smaller than in bowing machines or vertical turn-off systems.
Wie aus der mit mehr Details versehenen
Wie sich aus
In den
Diese Rollen 7, 8 sind grundsätzlich genauso aufgebaut wie die weiter oben zu sehenden Rollen 15, 16 der Strangführung 3. Die Rollen der Strangführung bestehen nämlich aus mehreren in Richtung Q quer zum Strang 6 hintereinander angeordneten Teilrollen 15', 15", 15"' bzw. 16', 16", 16"'. Abgestützt werden die Rollen durch Mittenlagerungen 9. Hiermit ergibt sich die Möglichkeit, dass der Durchmesser der Rollen kleiner gewählt werden kann, ohne Nachteile bezüglich der Durchbiegung der Rollen in Kauf nehmen zu müssen. Während zumeist Rollen mit einem Durchmesser von ca. 300 bis 420 mm gebräuchlich sind, können hiermit Rollen eingesetzt werden, die einen Durchmesser von unter 300 mm aufweisen. Die infolge der geringeren Abstände höheren (Biege-)Kräfte in den Rollen werden problemlos durch die Mittenlagerungen 9 aufgenommen.These
Die Rollen 7, 8 der Mittel 4 sind in einer Kassette 10 untergebracht. Diese Kassette kann als Ganzes montiert und demontiert werden. Die Einstellung der Position der Rollen 7, 8 erfolgt mit Bewegungsmitteln 11, von denen nur eines in Form eines hydraulischen Kolben-Zylinder-Systems dargestellt ist.The
Mit der vorgeschlagenen Ausgestaltung kann die Produktivität der Stranggießanlage wesentlich erhöht werden. Es ist weiterhin möglich, die Anlage schneller auf andere Fertigungsbedingungen einzustellen bzw. Komponenten der Anlage zu montieren und zu demontieren.With the proposed embodiment, the productivity of the continuous casting machine can be substantially increased. It is also possible to set the system faster to other production conditions or to assemble and disassemble components of the system.
Die genannte Verlängerung der Strangführung um 1.000 Millimeter erbrachte die Möglichkeit, mit einer höheren Gießgeschwindigkeit zu arbeiten, wobei in einem Ausführungsbeispiel eine Gießgeschwindigkeit von bis zu 6 m/min erreicht wurde. Die Dicke des Strangs lag dabei im Bereich zwischen 52 und 62 mm. Die Produktivität ließ sich damit um mehr als 10 % erhöhen. Die genannte vertikale Wechselmöglichkeit durch den Oszillationsrahmen hat sich als besonders vorteilhaft erwiesen.The mentioned extension of the strand guide by 1,000 millimeters provided the opportunity to work with a higher casting speed, wherein in one embodiment a casting speed of up to 6 m / min was achieved. The thickness of the strand was in the range between 52 and 62 mm. The productivity could be increased by more than 10%. The said vertical change possibility by the Oszillationsrahmen has proved to be particularly advantageous.
- 11
- Stranggießanlagecontinuous casting plant
- 22
- Kokillemold
- 33
- Strangführungstrand guide
- 4, 54, 5
- Mittel zum Treiben und BiegenMeans for driving and bending
- 44
- Mittel zum ausschließlichen TreibenMeans of exclusive activity
- 55
- Mittel zum ausschließlichen BiegenMeans for exclusive bending
- 66
- gegossener Strangcast strand
- 7,87.8
- Rollenpaarroller pair
- 77
- Rollerole
- 88th
- Rollerole
- 99
- Mittenlagerungcenter bearing
- 1010
- Kassettecassette
- 1111
- Bewegungsmittelmeans
- 1212
- Kühlkammercooling chamber
- 1313
- Boden der KühlkammerBottom of the cooling chamber
- 1414
- Walz-/TreibergerüsteRolling / driver frameworks
- 15', 15", 15'"15 ', 15 ", 15'"
- Rolle der StrangführungRole of strand guide
- 16', 16", 16'"16 ', 16 ", 16'"
- Rolle der StrangführungRole of strand guide
- HH
- Horizontalehorizontal
- VV
- Vertikalevertical
- Richtung quer zur Förderrichtung des StrangsDirection transverse to the conveying direction of the strand
- NN
- Normalenrichtung auf die StrangoberflächeNormal direction on the strand surface
Claims (11)
- Continuous casting plant (1) comprising a vertically oriented strip guide (3) arranged below a mould (2), wherein means (4, 5) for driving the cast strip (6) and bending thereof into the horizontal (H) are arranged below the strip guide (3), a means (4) for exclusive driving of the cast strip (6) is arranged below the lower end of the strip guide (3), and a means (4) for exclusive bending of the cast strip (6) is arranged below the means (4) for driving, the continuous casting plant (1) comprising a cooling device, which is in the form of a cooling chamber (12), in the region of the strip guide (3),
characterised in that
the means (4) for exclusive driving and the means for exclusive bending of the cast strip (6) are divided into separate elements, wherein the means (4) for exclusive driving is arranged in the cooling chamber (12) and consists of a single pair of driven rollers (7, 8) accommodated at least partly in a cassette (10), the cassette (10) being detachably arranged within the continuous casting plant (1). - Continuous casting plant according to claim 1, characterised in that the means (4) for exclusive driving of the cast strip (6) comprises at least one roller pair (7, 8) which has, along the direction (Q) extending transversely to the conveying direction of the strip (6), a plurality of successive part rollers mounted by centre mounts (9).
- Continuous casting plant according to one of claims 1 to 2, characterised in that the means (4) for exclusive driving of the cast strip (6) is detachably fastened to a segment frame disposed above the means (4).
- Continuous casting plant according to any one of claims 1 to 3, characterised in that the at least one roller pair (7, 8) is completely accommodated in the cassette (10).
- Continuous casting plant according to any one of claims 1 to 4, characterised in that at least one roller (7, 8) of the roller pair can be moved in a direction (N) normal to the surface of the strip (6) by way of a movement means (11).
- Continuous casting plant according to any one of claims 1 to 4, characterised in that the rollers (7, 8) of the means (4) for driving the strip (6) can be loaded with force in a direction (N) normal to the surface of the strip (6) by way of force generating elements.
- Continuous casting plant according to claim 6, characterised in that the force generating elements are supported on the frame of the continuous casting plant or on a component fixedly connected therewith.
- Continuous casting plant according to claim 6, characterised in that the force generating elements are supported on the cassette (10).
- Continuous casting plant according to any one of claims 1 to 8, characterised in that the lower base (13) of the cooling chamber (12) extends below the means (4) for driving the cast strip (6) and above the means (5) for bending the cast strip (6).
- Method of operating a continuous casting plant (1) according to any one of claims 1 to 9 for producing a cast strip (6), wherein the continuous casting plant (1) comprises a vertically oriented strip guide (3) arranged below a mould (2),
wherein means (4, 5) for driving the cast strip (6) and bending the same into the horizontal (H) are arranged below the strip guide (3),
and a cooling device in the form of a cooling chamber (12),
wherein the cast strip (6) is initially guided vertically downwardly through the strip guide (3), the strip (6) is then conveyed downwardly below the lower end of the strip guide (3) by the means (4) for exclusive driving of the strip (6), and the strip (6) is then bent over from the vertical (V) into the horizontal (H) by the means (5) for exclusive bending of the strip (6),
characterised in that
the means (4) for exclusive driving and the means for exclusive bending of the strip (3) are divided into separate elements,
the single means (4) is arranged in the cooling chamber and
the means (4), which consists of only a pair of driven rollers (7, 8), conveys the strip (6), wherein the one pair of rollers (7, 8) is accommodated at least partly in a cassette (10), which is mounted and demounted as a whole in the continuous casting plant (1), and the strip (6) is cooled in the region below the strip guide (3) up to its running-out into the horizontal (H) only in the region of the means (4) for exclusive driving. - Method according to claim 10, characterised in that no conveying of the strip (6) takes place in the bending region of the strip (6) from the vertical (V) up to the horizontal (H).
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006011385 | 2006-03-09 | ||
DE102006053016 | 2006-11-10 | ||
DE102006055443 | 2006-11-24 | ||
DE102007005778A DE102007005778A1 (en) | 2006-03-09 | 2007-02-06 | Continuous casting plant and method for operating a continuous casting plant |
PCT/EP2007/002005 WO2007101685A1 (en) | 2006-03-09 | 2007-03-08 | Continuous casting plant and method of operating a continuous casting plant |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1991379A1 EP1991379A1 (en) | 2008-11-19 |
EP1991379B1 true EP1991379B1 (en) | 2017-01-04 |
Family
ID=38055334
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07723100.9A Not-in-force EP1991379B1 (en) | 2006-03-09 | 2007-03-08 | Continuous casting plant and method of operating a continuous casting plant |
Country Status (8)
Country | Link |
---|---|
US (1) | US8100166B2 (en) |
EP (1) | EP1991379B1 (en) |
JP (1) | JP2009529426A (en) |
KR (1) | KR20080103522A (en) |
CA (1) | CA2642919A1 (en) |
DE (1) | DE102007005778A1 (en) |
MX (1) | MX2008011463A (en) |
WO (1) | WO2007101685A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101482334B1 (en) * | 2012-12-21 | 2015-01-13 | 주식회사 포스코 | Segment for continuous casting process |
DE102014224390A1 (en) * | 2014-11-28 | 2016-06-02 | Sms Group Gmbh | Continuous casting plant for thin slabs |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1222337A (en) | 1969-01-27 | 1971-02-10 | Fives Lille Cail | Continuous casting installation |
USB396916I5 (en) | 1973-09-13 | 1976-03-02 | ||
JPS5850156A (en) | 1981-09-04 | 1983-03-24 | Nippon Steel Corp | Continuous casting machine of low machine height and multipoints setting and curving type |
AT372025B (en) | 1982-01-12 | 1983-08-25 | Voest Alpine Ag | CONTINUOUS CASTING PLANT |
ES2089317T3 (en) | 1991-09-19 | 1996-10-01 | Schloemann Siemag Ag | PROCEDURE AND INSTALLATION FOR THE MANUFACTURE OF STEEL BELT. |
DE19637545B4 (en) | 1996-09-14 | 2007-10-18 | Sms Demag Ag | Device for diverting a cast in a continuous casting thin slab strand from the vertical in a horizontal Ausförderrichtung |
DE19838774A1 (en) * | 1998-08-26 | 2000-03-02 | Schloemann Siemag Ag | Casting of steel strip comprises locating the guide roll below the circular arc section and detecting the break between strip and guide roll |
DE10024508A1 (en) | 2000-05-18 | 2001-11-22 | Sms Demag Ag | Continuous casting of thin steel slabs uses a mold with a strand guiding device having additionally oscillating rollers for guiding and conveying a cast strand |
DE10049445A1 (en) * | 2000-10-06 | 2002-04-18 | Sms Demag Ag | Device for the continuous casting of metals, in particular steel, for the solidified bending process |
DE10206243A1 (en) * | 2002-02-15 | 2003-08-28 | Sms Demag Ag | Process for the continuous rolling of a metal strand, in particular a steel strand, which is dimensioned as a thin slab and has a casting speed, and associated continuous casting machine |
-
2007
- 2007-02-06 DE DE102007005778A patent/DE102007005778A1/en not_active Withdrawn
- 2007-03-08 WO PCT/EP2007/002005 patent/WO2007101685A1/en active Application Filing
- 2007-03-08 MX MX2008011463A patent/MX2008011463A/en active IP Right Grant
- 2007-03-08 JP JP2008557666A patent/JP2009529426A/en not_active Withdrawn
- 2007-03-08 KR KR1020087019703A patent/KR20080103522A/en not_active Application Discontinuation
- 2007-03-08 EP EP07723100.9A patent/EP1991379B1/en not_active Not-in-force
- 2007-03-08 US US12/224,700 patent/US8100166B2/en not_active Expired - Fee Related
- 2007-03-08 CA CA002642919A patent/CA2642919A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
US20090020259A1 (en) | 2009-01-22 |
MX2008011463A (en) | 2008-09-24 |
KR20080103522A (en) | 2008-11-27 |
JP2009529426A (en) | 2009-08-20 |
CA2642919A1 (en) | 2007-09-13 |
DE102007005778A1 (en) | 2007-09-13 |
EP1991379A1 (en) | 2008-11-19 |
WO2007101685A1 (en) | 2007-09-13 |
US8100166B2 (en) | 2012-01-24 |
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