EP0867239A2 - 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
EP0867239A2
EP0867239A2 EP98105061A EP98105061A EP0867239A2 EP 0867239 A2 EP0867239 A2 EP 0867239A2 EP 98105061 A EP98105061 A EP 98105061A EP 98105061 A EP98105061 A EP 98105061A EP 0867239 A2 EP0867239 A2 EP 0867239A2
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EP
European Patent Office
Prior art keywords
continuous furnace
slab
production line
surface processing
rolling
Prior art date
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.)
Granted
Application number
EP98105061A
Other languages
German (de)
French (fr)
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EP0867239B1 (en
EP0867239A3 (en
Inventor
Werner Mertens
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Siemag AG
Original Assignee
SMS Schloemann Siemag AG
Schloemann Siemag AG
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Publication of EP0867239A2 publication Critical patent/EP0867239A2/en
Publication of EP0867239A3 publication Critical patent/EP0867239A3/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-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
    • B21B1/46Metal-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
    • B21B1/466Metal-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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B45/00Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/38Arrangements of devices for charging
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B45/00Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/004Heating the product
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/51Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y10T29/5184Casting 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.
  • the slab sections to be treated are marked by heated this movable furnace section, transversely into one Side position of the roller hearth furnace brought under Longitudinal conveyor machined on the surfaces, then into the Promoted side heating position and heated transversely into the Main production line returned. According to this procedure can now process slab sections on their surface without disturbing the rest of the manufacturing process.
  • 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 in that the temperature treatment of a Slab section in the continuous furnace of one Surface treatment is interrupted and the Surface treatment of the slab section in the Production line between the casting machine and the rolling mill is carried out.
  • 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 through furnace without surface treatment, if the same Buffer capacity should be given. That means one additional extension of the through 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 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 (3b ⁇ ) 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)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)
  • Heat Treatment Of Articles (AREA)
  • Belt Conveyors (AREA)

Abstract

The method proposed can be used with slabs 40-100 mm thick. Such slabs are divided into sections, and are subjected to a heat treatment in a pass-through furnace (2, 3) before they are delivered into a rolling mill (6). Heat treatment of slab sections in the furnace is interrupted for surface treatment which takes place in the production line (x) between the casting station (1) and the rolling mill. The installation includes a surface treatment station (4) between the furnace sections (2, 3). Such a station houses a grinder or a flame treatment unit.

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.

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 Lange des Dünnbrammenstranges zu gewährleisten. Insbesondere die beim Gießbeginn oder nach einer Gießunterbrechung gegossenen ersten Abschnitte der Dünnbrammen können Mängel in ihrer Oberflächenbeschaffenheit aufweisen, die sich als Qualitätsminderung auch im gewalzten Blech auswirken.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 Have surface texture that turns out to be Impact on quality also in the rolled sheet.

Um diesen Mangel zu beheben, wird in einer nicht vorveröffentlichten deutschen Patentanmeldung (Anmelde-Nr. P 196 21 259.6) deshalb 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 ihre Oberfläche bearbeitet werden, ohne den übrigen Herstellungsablauf zu stören.To remedy this shortcoming, one will not Pre-published German patent application (application no. P 196 21 259.6) is therefore proposed, if necessary the corresponding faulty slab sections from the Pull out main production line, one Surface treatment by grinding or by flaming to carry out and then the treated in this way Slab sections back into the main production line infiltrate. For this purpose, the roller hearth furnace in which the slab sections to a homogeneous rolling temperature brought over a partial length of at least one in a transverse position of a side position is formed, where the side position with the surface finishing line flees. The slab sections to be treated are marked by heated this movable furnace section, transversely into one Side position of the roller hearth furnace brought under Longitudinal conveyor machined on the surfaces, then into the Promoted side heating position and heated transversely into the Main production line returned. According to this procedure can now process slab sections 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 one for surface treatment Machining line must be installed in which the Move slab sections forwards and then backwards again have to be 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 dadurch gelöst, dass die Temperaturbehandlung eines Brammenabschnitts im Durchlaufofen von einer Oberflächenbehandlung unterbrochen wird und die Oberflächenbehandlung des Brammenabschnitts in der Fertigungslinie zwischen der Gießanlage und der Walzstraße durchgeführt wird.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 in that the temperature treatment of a Slab section in the continuous furnace of one Surface treatment is interrupted and the Surface treatment of the slab section in the Production line between the casting machine and the rolling mill is carried out.

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 eject. 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 Durch Laufofen ohne Oberflächenbearbeitung, wenn gleiche Pufferkapazität gegeben sein soll. Das bedeutet eine zusätzliche Verlängerung des Durch Laufofens 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 through furnace without surface treatment, if the same Buffer capacity should be given. That means one additional extension of the through 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 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 in order to shorten the length of the continuous furnace.

Bei einer Anlage zur Durchführung des erfindungsgemäßen Verfahrens, die aus einer Stranggießanlage für Dünnbrammen, einer Ouerteileinrichtung, 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, an Ouerteileinrichtung, 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 plant 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 (3b∩∩) 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 (3b∩∩) 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 werdenAround 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 (8)

Verfahren zum Auswalzen von Warmbreitband aus stranggegossenen dünnen bzw. mitteldicken Brammen von etwa 40 bis 100 mm Dicke, wobei der gegossene Brammenstrang in Abschnitten unterteilt wird, in einem Durch Laufofen einer Temperaturbehandlung unterworfen und zum Auswalzen in eine Walzstraße gefördert wird, dadurch gekennzeichnet, dass die Temperaturbehandlung eines Brammenabschnitts (7) in dem Durchlaufofen (2, 3) zu einer Oberflächenbearbeitung unterbrochen wird und die Oberflächenbearbeitung des Brammenabschnitts (7) in der Fertigungslinie (x) zwischen der Gießanlage (1) und der Walzstraße (6) durchgeführt wird.Process for rolling out hot wide strip from continuously cast thin or medium-thick slabs of approximately 40 to 100 mm thick, the cast slab being divided into sections, subjected to a thermal treatment in a continuous furnace and conveyed for rolling into a rolling train, characterized in that the Temperature treatment of a slab section (7) in the continuous furnace (2, 3) is interrupted to a surface processing and the surface processing of the slab section (7) in the production line (x) between the casting machine (1) and the rolling train (6) is carried out. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Oberflächenbearbeitung mit von der Gießgeschwindigkeit abweichender Geschwindigkeit durchgeführt wird.A method according to claim 1, characterized in that the surface processing is carried out at a speed different from the casting speed. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Oberflächenbearbeitung ein Schleifvorgang ist.A method according to claim 1 or 2, characterized in that the surface treatment is a grinding process. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Oberflächenbearbeitung durch Flämmen erfolgt.A method according to claim 1 or 2, characterized in that the surface treatment is carried out by flaming. Verfahren nach einem oder mehreren der vorhergehenden Ansprüche 1 bis 4, dadurch gekennzeichnet, dass nach erfolgter Oberflächenbearbeitung der Brammenabschnitte (7) die weitere thermische Behandlung der Brammenabschnitte (7) teilweise in einem Teilbereich des Durchlaufofens (3) seitlich neben der Fertigungslinie (x) in einem als beheizbarer Doppelfähre ausgebildeten Segment (3b) des Durchlaufofens (2, 3) durchgeführt wird.Method according to one or more of the preceding claims 1 to 4, characterized in that after the surface treatment of the slab sections (7) has been carried out, the further thermal treatment of the slab sections (7) partly in a partial region of the continuous furnace (3) to the side next to the production line (x) in a segment (3b) of the continuous furnace (2, 3) designed as a heatable double ferry is carried out. Anlage zum Auswalzen von Warmbreitband aus stranggegossenen dünnen, bzw. mitteldicken Brammen von etwa 40 bis 100 mm Dicke nach dem Verfahren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Durch Laufofen (2, 3) in die Segmente (2) und (3) aufgeteilt ist und zwischen den Segmenten (2) und (3) eine Oberflächenbearbeitungsvorrichtung (4) angeordnet ist, die als Schleifvorrichtung oder Flämmeinrichtung ausgebildet ist.Plant for rolling out hot wide strip from continuously cast thin or medium-thick slabs of approximately 40 to 100 mm thickness according to the method of the preceding claims, characterized in that the continuous furnace (2, 3) is divided into segments (2) and (3) is and between the segments (2) and (3) a surface processing device (4) is arranged, which is designed as a grinding device or flame device. An Lage nach Anspruch 6, dadurch gekennzeichnet, dass der Abstand zwischen der in förderrichtung vor der Oberflächenbearbeitungsvorrichtung (4) angeordneten Querteileinrichtung (5), beispielsweise eine Schere, und der Oberflächenbearbeitungsvorrichtung (4) mindestens der Länge eines Brammenabschnitts (7) entspricht.A position according to claim 6, characterized in that the distance between the cross-section device (5), for example scissors, arranged upstream of the surface processing device (4) and the surface processing device (4) corresponds to at least the length of one slab section (7). Anlage nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass das Durchlaufofensegment (3) in Segmente (3a, 3b, 3c) weiter unterteilt ist und das Durchlaufofensegment (3b) in Form einer beheizbaren Doppelfähre ausgebildet ist, die parallel zur Fertigungslinie (x) so verfahrbar ist, dass sich jeweils eine der beiden beheizbaren Fähren in einer seitlichen Position (3b', 3b'') neben der Fertigungslinie (x) und jeweils die andere der beiden Fähren sich in der Fertigungslinie (x) befindet.System according to claim 6 or 7, characterized in that the continuous furnace segment (3) is further divided into segments (3a, 3b, 3c) and the continuous furnace segment (3b) is designed in the form of a heatable double ferry which runs parallel to the production line (x) It is movable that one of the two heated ferries is in a lateral position (3b ', 3b'') next to the production line (x) and the other of the two ferries is located 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)

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

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