EP0867239B1 - Method and installation for rolling hot wide strip from continuously cast thin slabs - Google Patents

Method and installation for rolling hot wide strip from continuously cast thin slabs Download PDF

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Publication number
EP0867239B1
EP0867239B1 EP98105061A EP98105061A EP0867239B1 EP 0867239 B1 EP0867239 B1 EP 0867239B1 EP 98105061 A EP98105061 A EP 98105061A EP 98105061 A EP98105061 A EP 98105061A EP 0867239 B1 EP0867239 B1 EP 0867239B1
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EP
European Patent Office
Prior art keywords
surface processing
slab
type oven
production line
sections
Prior art date
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Expired - Lifetime
Application number
EP98105061A
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German (de)
French (fr)
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EP0867239A2 (en
EP0867239A3 (en
Inventor
Werner Mertens
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SMS Siemag AG
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SMS Demag AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/466—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/38—Arrangements of devices for charging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/004—Heating the product
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y10T29/5184—Casting and working

Definitions

  • the invention relates to a method and to a plant for Rolling out hot wide strip from continuously cast thin or medium-thick slabs from about 40 to 100 mm thick, whereby the cast slab strand is divided into sections in a continuous furnace of a temperature treatment subjected and conveyed for rolling into a rolling mill becomes.
  • EP-A2-0 327 854 describes a method and an installation for Rolling of pre-strips cast on a strip caster known a hot wide strip finishing mill, with a thermal treatment of cast and pre-cast length divided supporting strips in a roller hearth furnace, in which the Pre-strips are brought to a homogeneous rolling temperature. Immediately before entering the finishing mill the opening lengths are still descaled.
  • US-A-5 533 248 suggests defective ones Slab sections before they are heat treated in an oven out of the production line and in a side line of a surface treatment undergo after which they are deposited in a buffer zone become.
  • the object of the invention is to continue the aforementioned method to train in a suitably trained facility the processing of faulty surfaces Slab sections improved in simpler, less expensive and can be carried out in a space-saving manner.
  • the task is in a rolling process of hot wide strip made of continuously cast thin or medium-thick slabs from 40 to 100 mm thick at the beginning mentioned type with the characterizing features of claim 1 solved.
  • the surface treatment which is a grinding or may be flaming of the defective surface according to an advantageous embodiment of the invention depending on the distance between the cross-cutting device (scissors) and the Surface treatment device with from the Casting speed of different variable speed be performed.
  • this distance corresponds to one Slab section length, then the Surface processing speed equal to or greater than the casting speed.
  • Fluctuations in the casting speed for example at occurring disturbances or at the end of a sequence have an effect thus advantageously no longer by the method of the invention negatively on the process of surface processing.
  • the surface treatment device with high Transport speed up to a maximum of 90 m / min. be passed through so that only a slight temperature loss arises.
  • the slab sections After the surface treatment, the slab sections further thermally treated to the desired Temperature profile to be brought up for the subsequent Rolling is required. Because this temperature compensation in the Continuous furnace, for example a roller hearth furnace, through the Surface processing was interrupted, especially if is sanded, and now after surface treatment continues, the continuous furnace is extended opposite a continuous furnace without surface treatment, if the same Buffer capacity should be given. That means one additional extension of the continuous furnace according to the Space requirement of the surface processing device. This Space requirements can also be easily achieved with new systems will be realized.
  • Extension of the continuous furnace is not possible necessary extension of the temperature treatment according to the Invention can be carried out in the manner of a ferry a laterally movable segment of the continuous furnace, the is designed as a double ferry, with a slab section filled on the side next to the continuous furnace in an offline position remains for a certain period of time and on this Way the buffer capacity of the continuous furnace in the required amount increased while the other ferry in Inline position is arranged in the production line and forms part of the continuous furnace.
  • the continuous furnace is, for example, a Roller hearth furnace, divided into two segments, between the in Inline position for a surface treatment device Processing defective slab sections is arranged.
  • a continuous furnace designed in this way can further segments can be divided, with a segment as heated double ferry is designed, the individual ferries alternately from the production line across to an offline page position are movable to the buffer capacity of the Increase continuous furnace.
  • a Hot grinding device can be provided, the roller table assigned.
  • the Hot grinding device or associated with the flaming machine Roller table is advantageously shielded against heat loss.
  • the system for Rolling out hot broadband essentially from one Continuous caster (1) for a thin slab strand of approximately 40 up to 100 mm thick, a cross-section device (5), for example scissors, a continuous furnace (2, 3), for example a roller hearth furnace, another pair of scissors (10) and a rolling mill (6).
  • the continuous furnace (2, 3) consists of the segments (2) and (3), between the one Surface processing device (4) is arranged.
  • the front continuous furnace segment (2) is so long that the Distance of the surface processing device (4) from the Cross-section device (5) at least the length of one Slab section (7, Fig. 3) corresponds.
  • the cast one Thin slab strand (11) is deflected into the horizontal production line (x) through the cross dividing device (5) divided into slab sections (7) of the desired length and introduced into the continuous furnace (2, 3).
  • the feed speed within the Surface processing device (4) from the Casting speed may vary, depending on the length of the Distance between the cross-section device (5) and the Surface processing device (4) of at least the Length of a slab section (7) corresponds.
  • the middle segment (3b) is as a heatable double ferry with single ferries, which are each long enough to be a slab section be able to record.
  • the double ferry can be moved laterally, so that in each case a single ferry on the production line (x) in Inline position is arranged while the other ferry (3600) then in an offline position next to the production line (x), i.e. also to the side of the continuous furnace.
  • Fig. 3 there is a single ferry (3b) filled with a slab section (7 '') in this side position (Offline position 3b ''), which increases the buffer capacity around this Slab section (7 '') is enlarged.
  • the other single ferry on the production line (x) and is part of the continuous furnace. After a The ferry is heated up for a certain heating time Slab section (7 '') from the offline position (3b '') in the Move back the production line (x) and the slab section (7 '') in the continuous furnace segment (3c) conveyed to the continue thermal treatment.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Metal Rolling (AREA)
  • Belt Conveyors (AREA)
  • Heat Treatment Of Articles (AREA)

Description

Die Erfindung ist auf ein Verfahren und auf eine Anlage zum Auswalzen von Warmbreitband aus stranggegossenen dünnen bzw. mitteldicken Brammen von etwa 40 bis 100 mm Dicke gerichtet, wobei der gegossene Brammenstrang in Abschnitte unterteilt wird, in einem Durchlaufofen einer Temperaturbehandlung unterworfen und zum Auswalzen in eine Walzstraße gefördert wird.The invention relates to a method and to a plant for Rolling out hot wide strip from continuously cast thin or medium-thick slabs from about 40 to 100 mm thick, whereby the cast slab strand is divided into sections in a continuous furnace of a temperature treatment subjected and conveyed for rolling into a rolling mill becomes.

Ein Verfahren gemäß Oberbegriff von Anspruch 1 sowie eine Anlage gemäß Oberbegriff von Anspruch 5 sind der EP-A- 0 665 296 zu entrehmen.A method according to the preamble of claim 1 and an installation according to the preamble of claim 5 EP-A-0 665 296.

Aus der EP-A2-0 327 854 ist ein Verfahren und eine Anlage zum Walzen von auf einer Bandgießanlage gegossenen Vorbändern in einer Warmbreitbandfertigwalzstraße bekannt, mit einer thermischen Behandlung der gegossenen und auf Vorbandlänge unterteilten Vorbänder in einem Rollenherdofen, in dem die Vorbänder auf eine homogene Walztemperatur gebracht werden. Unmittelbar vor ihrem Eintritt in die Fertigwalzstraße werden die Vorbandlängen noch entzundert.EP-A2-0 327 854 describes a method and an installation for Rolling of pre-strips cast on a strip caster known a hot wide strip finishing mill, with a thermal treatment of cast and pre-cast length divided supporting strips in a roller hearth furnace, in which the Pre-strips are brought to a homogeneous rolling temperature. Immediately before entering the finishing mill the opening lengths are still descaled.

Bei der Herstellung von Dünnbrammen ist es oft schwierig, die geforderte Oberflächenqualität über die gesamte Länge des Dünnbrammenstranges zu gewährleisten. Insbesondere die beim Gießbeginn oder nach einer Gießunterbrechung gegossenen ersten Abschnitte der Dünnbrammen können Mängel in ihrer When making thin slabs, it is often difficult to required surface quality over the entire length of the To ensure thin slab strand. In particular the Start of pouring or first poured after a pouring interruption Sections of thin slabs can have defects in their

Oberflächenbeschaffenheit aufweisen, die sich als Qualitätsminderung auch im gewalzten Blech auswirken.Have surface quality, which can also be seen as a reduction in quality impact rolled sheet.

Um diesen Mangel zu beheben, wird in der US-A-5 533 248 vorgeschlagen, fehlerhafte Brammenabschnitte bereits vor ihrer Temperaturbehandlung in einem Ofen aus der Fertigungslinie herauszuschleusen und in einer Seitenlinie einer Oberflächenbehandlung zu unterziehen, wonach sie in einer Pufferzone abgelagert werden.To remedy this deficiency, US-A-5 533 248 suggests defective ones Slab sections before they are heat treated in an oven out of the production line and in a side line of a surface treatment undergo after which they are deposited in a buffer zone become.

In einer nicht vorveröffentlichten deutschen Patentanmeldung (DE 196 21 259.6) wird vorgeschlagen, bei Bedarf die entsprechenden fehlerhaften Brammenabschnitte aus der Hauptproduktionslinie herauszuziehen, eine Oberflächenbehandlung durch Schleifen oder durch Flämmen durchzuführen und daran anschließend die so behandelten Brammenabschnitte wieder in die Hauptproduktionslinie einzuschleusen. Zu diesem Zweck ist der Rollenherdofen, in dem die Brammenabschnitte auf eine homogene Walztemperatur gebracht werden, über eine Teillänge aus mindestens einem in einer Seitenposition quer verfahrbaren Abschnitt gebildet, wobei die Seitenposition mit der Oberflächenbearbeitungslinie fluchtet. Die zu behandelnden Brammenabschnitte werden durch diesen verfahrbaren Ofenabschnitt beheizt, quer in eine Seitenposition des Rollenherdofens gebracht, unter Längsförderung an den Oberflächen bearbeitet, danach in die Seitenheizposition zurückgefördert und beheizt quer in die Hauptproduktionslinie zurückgebracht. Nach diesem Verfahren können nun Brammenabschnitte an ihrer Oberfläche bearbeitet werden, ohne den übrigen Herstellungsablauf zu stören.In a unpublished German patent application (DE 196 21 259.6) it is suggested, if necessary, the corresponding faulty slab sections pulling out of the main production line, a surface treatment to be carried out by grinding or by flaming and then on to feed the slab sections treated in this way back into the main production line. For this purpose is the roller hearth furnace in which the slab sections brought to a homogeneous rolling temperature over a partial length formed from at least one section which can be moved transversely in a side position, where the side position is aligned with the surface treatment line. The too treating slab sections are through this movable furnace section heated, placed transversely in a side position of the roller hearth, below Longitudinal conveyor machined on the surfaces, then in the side heating position conveyed back and heated across the main production line. Using this process, slab sections can now be processed on their surface without disturbing the rest of the manufacturing process.

Nachteilig ist, dass zur Oberflächenbearbeitung eine separate Bearbeitungslinie installiert werden muss, in die die Brammenabschnitte vorwärts und dann wieder rückwärts verfahren werden müssen, mit einem entsprechend hohen apparativen Aufwand und hohem Platzbedarf.The disadvantage is that a separate processing line for surface processing must be installed in which the slab sections move forward and then again must be moved backwards with a correspondingly high apparatus Effort and high space requirements.

Aufgabe der Erfindung ist es, das vorgenannte Verfahren weiter auszubilden, um so in einer entsprechend ausgebildeten Anlage die Bearbeitung fehlerhafter Oberflächen von Brammenabschnitten verbessert in einfacher, kostengünstiger und platzsparender Weise durchführen zu können.The object of the invention is to continue the aforementioned method to train in a suitably trained facility the processing of faulty surfaces Slab sections improved in simpler, less expensive and can be carried out in a space-saving manner.

Die gestellte Aufgabe wird bei einem Verfahren zum Auswalzen von Warmbreitband aus stranggegossenen dünnen bzw. mitteldicken Brammen von 40 bis 100 mm Dicke der eingangs genannten Art mit den Kennzeichnungsmerkmalen des Anspruchs 1 gelöst.The task is in a rolling process of hot wide strip made of continuously cast thin or medium-thick slabs from 40 to 100 mm thick at the beginning mentioned type with the characterizing features of claim 1 solved.

Gemäß der Erfindung ist somit eine Inline-Oberflächenbearbeitung von mangelhaften Brammenabschnitten möglich, ohne die Brammenabschnitte aus der Fertigungslinie auszuschleusen. Die Oberflächenbearbeitung, die ein Schleifen oder ein Flämmen der mangelhaften Oberfläche sein kann, kann nach einer vorteilhaften Ausgestaltung der Erfindung je nach dem Abstand zwischen der Querteilvorrichtung (Schere) und der Oberflächenbearbeitungsvorrichtung mit von der Gießgeschwindigkeit abweichender variabler Geschwindigkeit durchgeführt werden.According to the invention is therefore an inline surface treatment of defective slab sections possible without the slab sections from the production line auszuschleusen. The surface treatment, which is a grinding or may be flaming of the defective surface according to an advantageous embodiment of the invention depending on the distance between the cross-cutting device (scissors) and the Surface treatment device with from the Casting speed of different variable speed be performed.

Entspricht beispielsweise dieser Abstand einer Brammenabschnittslänge, dann kann die Oberflächenbearbeitungsgeschwindigkeit gleich oder größer als die Gießgeschwindigkeit sein. For example, this distance corresponds to one Slab section length, then the Surface processing speed equal to or greater than the casting speed.

Entspricht der Abstand zwischen der Oberflächenbearbeitungsvorrichtung und der Querteileinrichtung beispielsweise der zweifachen Brammenabschnittslänge, dann könnte ein einzelner Brammenabschnitt auch mit halber Gießgeschwindigkeit bearbeitet werden oder aber auch zwei Brammenabschnitte mit drei Viertel der Gießgeschwindigkeit.Corresponds to the distance between the Surface processing device and the cross-cutting device for example twice the slab section length, then could a single slab section with half Casting speed can be edited or two Slab sections at three quarters of the casting speed.

Schwankungen in der Gießgeschwindigkeit, beispielsweise bei auftretenden Störungen oder am Ende einer Sequenz, wirken sich somit mit Vorteil durch das Verfahren der Erfindung nicht mehr negativ auf den Ablauf der Oberflächenbearbeitung aus.Fluctuations in the casting speed, for example at occurring disturbances or at the end of a sequence have an effect thus advantageously no longer by the method of the invention negatively on the process of surface processing.

Da bei Beginn der Oberflächenbearbeitung die entsprechenden Brammenabschnitte einen Teil der Heizvorrichtung bereits durchlaufen haben, ist bereits ein gleichmäßiges Temperaturprofil über die Breite und Länge der Brammenabschnitte vorhanden, was sich vorteilhaft für einen gleichmäßigen Schleifabtrag auswirkt, wenn die Oberflächenbearbeitung durch Schleifen erfolgt.Because at the beginning of the surface processing the corresponding Slab sections already have part of the heater have gone through is a steady one Temperature profile across the width and length of the Slab sections available, which is advantageous for one uniform abrasion affects when the Surface processing is done by grinding.

Für den Fall, dass Brammenabschnitte nicht bearbeitet werden sollen, kann die Oberflächenbearbeitungsvorrichtung mit hoher Transportgeschwindigkeit bis etwa maximal 90 m/min. durchfahren werden, so dass nur ein geringer Temperaturverlust entsteht.In the event that slab sections are not processed should, the surface treatment device with high Transport speed up to a maximum of 90 m / min. be passed through so that only a slight temperature loss arises.

Nach der Oberflächenbearbeitung werden die Brammenabschnitte weiter thermisch behandelt, um auf das gewünschte Temperaturprofil gebracht zu werden, das für das anschließende Walzen erforderlich ist. Da dieser Temperaturausgleich in dem Durchlaufofen, beispielsweise einem Rollenherdofen, durch die Oberflächenbearbeitung unterbrochen wurde, insbesondere wenn geschleift wird, und nun nach der Oberflächenbearbeitung weiter erfolgt, verlängert sich der Durchlaufofen gegenüber einem Durchlaufofen ohne Oberflächenbearbeitung, wenn gleiche Pufferkapazität gegeben sein soll. Das bedeutet eine zusätzliche Verlängerung des Durchlaufofens entsprechend dem Platzbedarf der Oberflächenbearbeitungsvorrichtung. Dieser Platzbedarf kann in einfacher Weise bei Neuanlagen auch realisiert werden.After the surface treatment, the slab sections further thermally treated to the desired Temperature profile to be brought up for the subsequent Rolling is required. Because this temperature compensation in the Continuous furnace, for example a roller hearth furnace, through the Surface processing was interrupted, especially if is sanded, and now after surface treatment continues, the continuous furnace is extended opposite a continuous furnace without surface treatment, if the same Buffer capacity should be given. That means one additional extension of the continuous furnace according to the Space requirement of the surface processing device. This Space requirements can also be easily achieved with new systems will be realized.

Wenn das Verfahren der Erfindung, der Inline-Oberflächenbearbeitung, dagegen in eine gegebene Anlagenkonfiguration integriert werden soll, in der eine Verlängerung des Durchlaufofens nicht möglich ist, kann die erforderliche Verlängerung der Temperaturbehandlung gemäß der Erfindung in der Weise durchgeführt werden, dass eine Fähre eines seitlich verfahrbaren Segmentes des Durchlaufofens, das als Doppelfähre ausgebildet ist, mit einem Brammenabschnitt gefüllt seitlich neben dem Durchlaufofen in einer Offline-Position über einen gewissen Zeitraum verbleibt und auf dieser Weise die Pufferkapazität des Durchlaufofens auf die erforderliche Menge vergrößert, während die andere Fähre in Inline-Position in der Fertigungslinie angeordnet ist und einen Teil des Durchlaufofens bildet. Selbstverständlich kann diese Möglichkeit der Ausbildung eines Duchlaufofensegmentes als beheizbare Doppelfähre auch bei Neuanlagen eingeplant werden, um die Anlagenlänge des Durchlaufofens zu verkürzen.If the method of the invention, inline surface finishing, against a given Plant configuration should be integrated in the one Extension of the continuous furnace is not possible necessary extension of the temperature treatment according to the Invention can be carried out in the manner of a ferry a laterally movable segment of the continuous furnace, the is designed as a double ferry, with a slab section filled on the side next to the continuous furnace in an offline position remains for a certain period of time and on this Way the buffer capacity of the continuous furnace in the required amount increased while the other ferry in Inline position is arranged in the production line and forms part of the continuous furnace. Of course you can this possibility of forming a continuous furnace segment also planned as a heatable double ferry for new systems to shorten the length of the continuous furnace.

Bei einer Anlage zur Durchführung des erfindungsgemäßen Verfahrens, die aus einer Stranggießanlage für Dünnbrammen, einer Querteileinrichtung, einem Durchlaufofen und einer Walzstraße besteht, ist der Durchlaufofen, beispielsweise ein Rollenherdofen, in zwei Segmente unterteilt, zwischen die in Inline-Position eine Oberflächenbearbeitungsvorrichtung zur Bearbeitung mangelhafter Brammenabschnitte angeordnet ist.In a system for performing the invention Process consisting of a continuous caster for thin slabs, a cross-cutting device, a continuous furnace and one Rolling mill exists, the continuous furnace is, for example, a Roller hearth furnace, divided into two segments, between the in Inline position for a surface treatment device Processing defective slab sections is arranged.

Zusätzlich kann ein derart ausgebildeter Durchlaufofen in weitere Segmente unterteilt sein, wobei ein Segment als beheizbare Doppelfähre ausgestaltet ist, deren einzelne Fähren abwechselnd aus der Fertigungslinie quer in je eine Offline-Seitenposition verfahrbar sind, um die Pufferkapazität des Durchlaufofens zu erhöhen.In addition, a continuous furnace designed in this way can further segments can be divided, with a segment as heated double ferry is designed, the individual ferries alternately from the production line across to an offline page position are movable to the buffer capacity of the Increase continuous furnace.

Als Oberflächenbearbeitungsvorrichtung kann eine Heißschleifvorrichtung vorgesehen sein, der ein Rollgang zugeordnet ist. Alternativ kann als Oberflächenbearbeitungsvorrichtung eine Flämmmaschine mit zugeordnetem Rollgang eingesetzt werden. Der der Heißschleifvorrichtung bzw. der Flämmmaschine zugeordnete Rollgang ist vorteilhaft gegen Wärmeverluste abgeschirmt.As a surface processing device, a Hot grinding device can be provided, the roller table assigned. Alternatively, as Surface treatment device with a flame machine assigned roller table can be used. The the Hot grinding device or associated with the flaming machine Roller table is advantageously shielded against heat loss.

Weitere Vorteile, Einzelheiten und Merkmale der Erfindung ergeben sich aus den nachfolgenden Erläuterungen der in schematischen Zeichnungsfiguren dargestellten Ausführungsbeispiele.Further advantages, details and features of the invention result from the following explanations of the in illustrated schematic drawing figures Embodiments.

Es zeigen:

Fig. 1
eine Seitenansicht einer Anlage zum Auswalzen von Warmbreitband,
Fig. 2
eine Draufsicht auf eine Anlage gemäß Fig. 1,
Fig. 3
eine Draufsicht auf eine Anlage zum Auswalzen von Warmbreitband mit in dem Durchlaufofen integrierter Doppelfähre.
Show it:
Fig. 1
a side view of a plant for rolling out hot wide strip,
Fig. 2
2 shows a plan view of a system according to FIG. 1,
Fig. 3
a plan view of a system for rolling out hot wide strip with double ferry integrated in the continuous furnace.

Entsprechend der Figuren 1 und 2 besteht die Anlage zum Auswalzen von Warmbreitband im wesentlichen aus einer Stranggießanlage (1) für einen Dünnbrammenstrang von etwa 40 bis 100 mm Dicke, einer Querteileinrichtung (5), beispielsweise einer Schere, einem Durchlaufofen (2, 3), beispielsweise einem Rollenherdofen, einer weiteren Schere (10) sowie einer Walzstraße (6). Der Durchlaufofen (2, 3) besteht aus den Segmenten (2) und (3), zwischen die eine Oberflächenbearbeitungsvorrichtung (4) angeordnet ist. Das vordere Durchlaufofensegment (2) ist dabei so lang, dass der Abstand der Oberflächenbearbeitungsvorrichtung (4) von der Querteileinrichtung (5) mindestens der Länge eines Brammenabschnittes (7, Fig. 3) entspricht. Der gegossene Dünnbrammenstrang (11) wird nach seiner Umlenkung in die horizontale Fertigungslinie (x) durch die Querteileinrichtung (5) in Brammenabschnitte (7) gewünschter Länge unterteilt und in den Durchlaufofen (2, 3) eingeführt.According to Figures 1 and 2, the system for Rolling out hot broadband essentially from one Continuous caster (1) for a thin slab strand of approximately 40 up to 100 mm thick, a cross-section device (5), for example scissors, a continuous furnace (2, 3), for example a roller hearth furnace, another pair of scissors (10) and a rolling mill (6). The continuous furnace (2, 3) consists of the segments (2) and (3), between the one Surface processing device (4) is arranged. The front continuous furnace segment (2) is so long that the Distance of the surface processing device (4) from the Cross-section device (5) at least the length of one Slab section (7, Fig. 3) corresponds. The cast one Thin slab strand (11) is deflected into the horizontal production line (x) through the cross dividing device (5) divided into slab sections (7) of the desired length and introduced into the continuous furnace (2, 3).

Brammenabschnitte (7) mit unzureichender Oberflächenqualität werden in der zwischen den Durchlaufofensegmenten (2) und (3) angeordneten Oberflächenbearbeitungsvorrichtung (4) bearbeitet, wobei die Vorschubgeschwindigkeit innerhalb der Oberflächenbearbeitungsvorrichtung (4) von der Gießgeschwindigkeit abweichen kann, je nach der Länge des Abstandes zwischen der Querteileinrichtung (5) und der Oberflächenbearbeitungsvorrichtung (4) der mindestens der Länge eines Brammenabschnittes (7) entspricht. Slab sections (7) with insufficient surface quality are in the between the continuous furnace segments (2) and (3) arranged surface processing device (4) processed, the feed speed within the Surface processing device (4) from the Casting speed may vary, depending on the length of the Distance between the cross-section device (5) and the Surface processing device (4) of at least the Length of a slab section (7) corresponds.

Brammenabschnitte (7) mit ausreichender Oberflächenqualität werden hingegen mit erhöhter Geschwindigkeit durch die Oberflächenbearbeitungsvorrichtung (4) in das nächste Durchlaufofensegment (3) gefördert. Die im Durchlaufofen (2, 3) auf homogene Walztemperatur erwärmten Brammenabschnitte (7) werden anschließend in der Walzstraße (6) fertig gewalzt, wobei sie je nach Bedarf mittels der Schere (10) vorher nochmals geteilt werden können.Slab sections (7) with sufficient surface quality are, however, with increased speed by the Surface processing device (4) in the next Continuous furnace segment (3) promoted. The in the continuous furnace (2, 3) slab sections (7) heated to homogeneous rolling temperature are then finished rolled in the rolling mill (6), depending on the need using the scissors (10) beforehand can be shared again.

In der in der Figur 3 schematisch dargestellten Anlage ist zum Unterschied zur Anlage gemäß der Figuren 1 und 2 das Durchlaufofensegment (3) in insgesamt drei Segmente (3a, 3b, 3c) weiter unterteilt. Das mittlere Segment (3b) ist dabei als eine beheizbare Doppelfähre mit Einzelfähren ausgebildet, die jeweils so lang sind, dass sie einen Brammenabschnitt aufnehmen können. Die Doppelfähre ist seitlich verfahrbar, so dass jeweils eine Einzelfähre auf der Fertigungslinie (x) in Inline-Position angeordnet ist, während sich die andere Fähre (3600) dann in eine Offline-Position neben der Fertigungslinie (x), also auch seitlich neben dem Durchlaufofen, befindet.In the system shown schematically in FIG Difference to the system according to Figures 1 and 2 that Continuous furnace segment (3) in a total of three segments (3a, 3b, 3c) further divided. The middle segment (3b) is as a heatable double ferry with single ferries, which are each long enough to be a slab section be able to record. The double ferry can be moved laterally, so that in each case a single ferry on the production line (x) in Inline position is arranged while the other ferry (3600) then in an offline position next to the production line (x), i.e. also to the side of the continuous furnace.

In Fig. 3 befindet sich eine Einzelfähre (3b), gefüllt mit einem Brammenabschnitt (7'') in dieser Seitenposition (Offline-Position 3b''), wodurch die Pufferkapazität um diesen Brammenabschnitt (7'') vergrößert wird. Gleichzeitig befindet sich die andere Einzelfähre auf der Fertigungslinie (x) und stellt einen Teil des Durchlaufofens dar. Nach einer bestimmten Heizdauer wird die Fähre mit dem nun aufgeheizten Brammenabschnitt (7'') aus der Offline-Position (3b'') in die Fertigungslinie (x) zurückverfahren und der Brammenabschnitt (7'') in das Durchlaufofensegment (3c) gefördert, um die thermische Behandlung fortzusetzen. Gleichzeitig verläßt die andere Einzelfähre, gefüllt mit einem Brammenabschnitt (7') oder je nach Bedarf auch leer, die Fertigungslinie (x) und gelangt in die Offline-Position (3b'). Auf diese Weise kann je nach der Aufheizdauer außerhalb der Fertigungslinie (x) die Pufferkapazität des Durchlaufofens (2, 3) bei einem nachträglichen Einbau der Oberflächenbearbeitungsvorrichtung in einen vorhandenen Durchlaufofen den thermischen Bedürfnissen zur Erzielung einer homogenen Walztemperatur angepaßt werden.In Fig. 3 there is a single ferry (3b) filled with a slab section (7 '') in this side position (Offline position 3b ''), which increases the buffer capacity around this Slab section (7 '') is enlarged. Located at the same time the other single ferry on the production line (x) and is part of the continuous furnace. After a The ferry is heated up for a certain heating time Slab section (7 '') from the offline position (3b '') in the Move back the production line (x) and the slab section (7 '') in the continuous furnace segment (3c) conveyed to the continue thermal treatment. At the same time the leaves other single ferry filled with a slab section (7 ') or, if required, also empty, the production line (x) and reaches the offline position (3b '). That way, ever after the heating-up time outside the production line (x) Buffer capacity of the continuous furnace (2, 3) at one subsequent installation of the surface treatment device the thermal in an existing continuous furnace Needs to achieve a homogeneous rolling temperature be adjusted.

Um die Dopplelfähre, gefüllt mit einem Brammenabschnitt, seitlich verfahren zu können, ist das Durchlaufofensegment (3a) erforderlich, denn hierdurch kann nach der Oberflächenbearbeitung eine Lücke zum nächstfolgenden noch zu bearbeitenden Brammenabschnitt (7') erzeugt werden und die Doppelfähre ungehindert durch eine aus der Oberflächenbearbeitungsvorrichtung (4) austretenden Brammenabschnitt (7) verfahren werden.Around the double ferry, filled with a slab section, To be able to move laterally is the continuous furnace segment (3a) required, because this can lead to the Surface processing still has a gap to the next one processing slab section (7 ') are generated and the Double ferry unhindered by one from the Surface processing device (4) emerging Slab section (7) to be moved.

In den Ausführungsbeispielen werden jeweils nur eine Produktionslinie dargestellt. Es kann sich hierbei gemäß der Erfindung auch um einen Strang einer 2 x 1 Stranggießanlage oder auch um einen Strang einer Zweistranggießanlage handeln.In the exemplary embodiments, only one is used Production line shown. According to the Invention also for a strand of a 2 x 1 continuous caster or also be a strand of a two-strand casting plant.

Claims (7)

  1. Method of rolling hot wide strip from continuously cast thin or medium-thickness slabs of 40 to 100 mm thickness, wherein the cast slab strip is subdivided in a cross-cutting device (5) into sections (7), subjected to a temperature treatment in a through-type oven (2, 3) and conveyed to a roll train for rolling out, characterised in that the temperature treatment of a deficient slab section (7) in the through-type oven (2, 3) is interrupted for a surface processing in a surface treatment device (4) and the surface processing of the slab section (7) is carried out in the production line (x) between the casting plant (1) and the roll train (6) at a speed which is decoupled from the casting speed and which is variable according to the respective length of a slab section (7) with respect to the spacing between the cross-cutting device (5) and the surface treatment device (4).
  2. Method according to claim 1, characterised in that the surface processing is a grinding process.
  3. Method according to claim 1, characterised in that the surface processing is carried out by flame scarfing.
  4. Method according to claim 1, 2 or 3, characterised in that after surface processing of the slab sections (7) has been carried out the further thermal treatment of the slab sections is undertaken partly in a part region of the through-type oven (3) laterally adjacent to the production line (x) in a segment (3b), which is formed as a double ferry, of the through-type oven (2, 3).
  5. Plant for rolling hot wide strip from continuously cast thin or medium-thickness slabs of 40 to 100 mm thickness, according to the method of the preceding claims, with a casting plant (1), a cross-cutting device (5), a through-type oven (2, 3) and a roll train, characterised in that the through-type oven (2, 3) is divided up into segments (2 and 3) and a surface processing device (4), which is constructed as a grinding device or flame scarfing equipment, with an associated roller path is arranged between the segments (2 and 3).
  6. Plant according to claim 5, characterised in that, in use, the spacing between the cross-cutting device (5), for example shears, arranged in front of the surface processing device (4) in conveying direction and the surface processing device (4) corresponds with at least the length of a slab section (7).
  7. Plant according to claim 5 or 6, characterised in that the through-type oven segment (3) is further subdivided into segments (3a, 3b, 3c) and the through-type oven segment (3b) is constructed in the form of a heatable double ferry which is so movable parallel to the production line (x) that in each case one of the two heatable ferries is disposed in a lateral position (3b', 3b") near the production line (x) and the respective other one of the two ferries is disposed in the production line (x).
EP98105061A 1997-03-24 1998-03-20 Method and installation for rolling hot wide strip from continuously cast thin slabs Expired - Lifetime EP0867239B1 (en)

Applications Claiming Priority (2)

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DE19712212 1997-03-24
DE19712212A DE19712212A1 (en) 1997-03-24 1997-03-24 Process and plant for rolling out hot wide strip from continuously cast slabs

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EP0867239A2 EP0867239A2 (en) 1998-09-30
EP0867239A3 EP0867239A3 (en) 1999-03-31
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EP (1) EP0867239B1 (en)
JP (1) JP4263266B2 (en)
KR (1) KR100604111B1 (en)
CN (1) CN1118341C (en)
AR (1) AR012143A1 (en)
AT (1) ATE227614T1 (en)
BR (1) BR9800938A (en)
CA (1) CA2232853C (en)
DE (2) DE19712212A1 (en)
ES (1) ES2186937T3 (en)
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DE102009060824A1 (en) 2009-12-29 2011-06-30 SMS Siemag AG, 40237 Transport device for slabs
DE102010004563A1 (en) 2010-01-14 2011-07-21 SMS Siemag AG, 40237 Method and device for inline surface treatment of slabs

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US6296047B1 (en) 1999-05-21 2001-10-02 Danieli Technology, Inc. Endless casting rolling system with single casting stand
US6289972B1 (en) * 1999-05-21 2001-09-18 Danieli Technology Inc. Integrated plant for the production of rolled stock
DE10252246A1 (en) * 2002-11-07 2004-05-27 Sms Demag Ag Process for surface treating a thin slab to remove surface defects and impurities inside a continuous casting plant comprises completely cooling, surface treating, bringing to a rolling temperature, and feeding to a rolling mill
DE10304318C5 (en) * 2003-02-04 2015-10-15 Sms Group Gmbh Process for rolling thin and / or thick slabs of steel materials to hot strip
ATE461763T1 (en) * 2004-10-28 2010-04-15 Giovanni Arvedi METHOD AND PRODUCTION SYSTEM FOR PRODUCING HOT ULTRA-THIN STEEL STRIPS WITH TWO CONTINUOUS CASTING SYSTEMS FOR A SINGLE CONTINUOUS ROLLING LINE
DE102005010243A1 (en) * 2005-03-05 2006-09-07 Sms Demag Ag Method and plant for producing a lightweight steel with a high manganese content
DE102008020412A1 (en) * 2007-08-24 2009-02-26 Sms Demag Ag Method and device for producing a metal strip by casting rolls
DE102007057423A1 (en) * 2007-11-29 2009-06-04 Sms Demag Ag Milling machine for milling a slab
AT507475B1 (en) * 2008-10-17 2010-08-15 Siemens Vai Metals Tech Gmbh METHOD AND DEVICE FOR PRODUCING HOT-ROLLED SILICON STEEL ROLLING MATERIAL
KR101189516B1 (en) * 2010-02-08 2012-10-10 주식회사 포스코 Slab processing method and slab processing system
DE102016216727A1 (en) 2016-09-05 2018-03-08 Sms Group Gmbh In continuous operation operable production plant and method for operating the production plant in case of failure
DE102017210850A1 (en) * 2016-11-17 2018-05-17 Sms Group Gmbh Furnace for heating metal strips, and apparatus and method for the production of metal strips in the casting-rolling process
CN106440773B (en) * 2016-11-21 2024-07-30 艾伯纳工业炉(太仓)有限公司 Flow guiding injection system for bottom of vertical pushing furnace
KR101998966B1 (en) 2017-11-03 2019-07-10 주식회사 포스코 Continuous casting and rolling apparatus and method
IT201800004170A1 (en) * 2018-04-03 2019-10-03 CONTINUOUS CASTING AND LAMINATION PLANT FOR THE PRODUCTION OF METALLURGIC PRODUCTS
CN109870026A (en) * 2019-03-13 2019-06-11 一汽-大众汽车有限公司 A kind of heating system and the method for preparing partition heating high strength steel plate
DE102020206176A1 (en) * 2019-12-11 2021-06-17 Sms Group Gmbh Device and method for flexibly influencing the process control, in particular the temperature control, of a metal product passed along a single flow line by means of at least two adjacent segments

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DE102009060824A1 (en) 2009-12-29 2011-06-30 SMS Siemag AG, 40237 Transport device for slabs
WO2011080064A2 (en) 2009-12-29 2011-07-07 Sms Siemag Ag Transport device for slabs
DE102010004563A1 (en) 2010-01-14 2011-07-21 SMS Siemag AG, 40237 Method and device for inline surface treatment of slabs
WO2011086040A2 (en) 2010-01-14 2011-07-21 Sms Siemag Ag Method and device for in-line surface treatment of slabs
US8572826B2 (en) 2010-01-14 2013-11-05 Sms Siemag Aktiengesellschaft Method and device for in-line surface treatment of slabs

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EP0867239A2 (en) 1998-09-30
RU2211100C2 (en) 2003-08-27
ATE227614T1 (en) 2002-11-15
DE59806228D1 (en) 2002-12-19
TW376336B (en) 1999-12-11
JP4263266B2 (en) 2009-05-13
US6071362A (en) 2000-06-06
CN1118341C (en) 2003-08-20
ES2186937T3 (en) 2003-05-16
DE19712212A1 (en) 1998-10-01
AR012143A1 (en) 2000-09-27
MY120227A (en) 2005-09-30
CN1210765A (en) 1999-03-17
CA2232853A1 (en) 1998-09-24
KR100604111B1 (en) 2006-09-22
CA2232853C (en) 2008-06-10
BR9800938A (en) 1999-09-28
ID20917A (en) 1999-03-25
KR19980080592A (en) 1998-11-25
JPH10296318A (en) 1998-11-10
EP0867239A3 (en) 1999-03-31

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