EP0415987B2 - Process for continuous production of steel strip or steel sheet from flat products made by the circular-arc type continuous casting process - Google Patents

Process for continuous production of steel strip or steel sheet from flat products made by the circular-arc type continuous casting process Download PDF

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Publication number
EP0415987B2
EP0415987B2 EP89906038A EP89906038A EP0415987B2 EP 0415987 B2 EP0415987 B2 EP 0415987B2 EP 89906038 A EP89906038 A EP 89906038A EP 89906038 A EP89906038 A EP 89906038A EP 0415987 B2 EP0415987 B2 EP 0415987B2
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EP
European Patent Office
Prior art keywords
rolling
strip
installation according
thin slab
heating
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EP89906038A
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German (de)
French (fr)
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EP0415987A1 (en
EP0415987B1 (en
Inventor
Giovanni Arvedi
Giovanni Gosio
Ulrich Siegers
Klaus BRÜCKNER
Peter Meyer
Ernst Windhaus
Fritz-Peter Pleschiutschnigg
Werner Rahmfeld
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Mannesmann 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
    • B21B1/463—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 continuous process, i.e. the cast not being cut before rolling
    • 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
    • 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
    • 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
    • B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
    • 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
    • B21B1/22—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 plates, strips, bands or sheets of indefinite length
    • B21B1/24—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/26—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
    • 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

Definitions

  • the invention relates to a process for continuous Manufacture of steel strip or sheet steel from according to the Continuous sheet casting process with horizontal outlet direction manufactured flat products.
  • One of the new technologies in terms of the current requirements for steel production currently being processed concerns the processing stages between the melting of the steel and reeling the steel strip in the form of rolls or “coils” or the stacking of sheets and comprises the casting of thin slabs close to their final dimensions Thickness, which then followed in just a few Stitches or deformation steps to the desired one End product can be processed further.
  • This has remarkable improvements in continuous casting technology led, especially in terms of construction the mold and the corresponding immersion spout, as well as improvements in construction of the rolling stands and lines with the aim of in as far as possible a few stitches to achieve the desired deformation.
  • Another solution is to separate the Tape in front of a heating oven, in which subsequently the heat treatment (temperature compensation) of the Band made over its entire cross section becomes.
  • This can e.g. be a gas heated roller oven, with the irrespective of the casting speed to be taken into account a strip temperature at the furnace outlet 1100 degrees C can be set, so an optimal temperature for the subsequent rolling process.
  • the tape is cut to a standard length, for example for a specific coil weight can be at 50 m, for which a corresponding Oven length of approx. 150 m is required if you consider the takes into account the required buffering effect.
  • the aim of the present invention is to create a method of the type described above and a corresponding system for carrying out this Process with which steel strip is continuously made from a flat product coming from a continuous caster can be produced without the aforementioned disadvantages to take over.
  • the aim is to separate the strand between the casting process and at least the first rolling process be dispensed with, tapping the casting strand in the first mill stand at that speed takes place with which the rolling stock the arc section of the continuous caster leaves.
  • the process should therefore be "in line” done with virtually unlimited flexibility so that it becomes possible to use coils of any type Manufacture weight and any length or sheet, without changing the dimensional parameters of the system, since the cutting off of the rolled strip is at least after the first rolling process or after execution all operations immediately before the reel or Stacking device is made.
  • the object is achieved by a method according to claim 1.
  • An essential aspect of the present invention is the inductive reheating of the flat product after descaling to temperatures of approx. 1100 degrees C. with the best possible temperature compensation, because such a Countercooling of the belt counteracted in a favorable manner can be.
  • one or more levels of inductive Intermediate heating of the flat product between the above Deformation stages to be provided Through this Intermediate heating also becomes too strong Cooling of the rolling stock counteracted, so that always the necessary rolling temperatures are set in this way can be that in the last stage of deformation Temperatures not below the limit of 860 degrees Celsius sink.
  • the run-up strand can be run through the roll stands be separated with that facility, those for dividing the rolled strips are available anyway is, or it can by another separation device separated behind the first stage of deformation become.
  • the separating device can be behind the first deformation device be arranged and between the first deformation device and the further deformation device can be a device for opening and closing Uncoiling of the flat product may be provided, which precedes the separating device.
  • the device for winding and unwinding the Flat product behind the device for inductive Heating up and in front of the further shaping device arranged.
  • this system is either a separation device for the rolled strip and downstream of at least one reel for reeling the tape or a separation device for the rolled strip, a cooling device, a straightening machine and a stacking device for the separated sheets.
  • system additionally at least one device for inductive heating for intermediate heating between the other rolling stands.
  • each of these devices is separate controllable heating levels.
  • the system also with adjustment devices of the flow cross section between the roles of first deformation device and the other rolling stands equipped to the flow of the head to enable the starting strand of the casting strand to sit and immediately after its passage the Cross sections back to the usual throughput values attributed.
  • Successive control devices of the individual heating levels of the ovens immediately after passing through the start-up line, the Disconnect device for separating the start-up line is the one that is also used to cut off the rolled strip is used, namely that at the end portion of the Separating device in the system.
  • the Disconnect device for separating the start-up line used which is behind the first stage of deformation located.
  • the invention is roughly schematic System shown, based on which the corresponding Procedure is described.
  • Starting from a continuous casting mold, marked with 1 in the drawing is the flat product 2. That in conventional Support rollers guided and transported flat product 2 goes from the initial vertical direction over the arc path formed by the support rollers in the horizontal position. After solidification, namely in the end area of the arc, that goes through Flat product according to the invention a first stage of deformation 3, for example, to a thickness of is brought to a maximum of 25 mm.
  • Deformation stage 3 can consist of one or more rolling devices, preferably in quarto order.
  • a furnace 5 is subsequently provided for temperature compensation, the one with an inductive heating device Is provided.
  • this oven 5 is done at the same time a temperature compensation over the entire Cross section of the flat product 2, so that this the first frame 6 of the further deformation device reached with sufficient rolling temperature.
  • the tapping speed is too slow, this is appropriate the one driven when exiting the arc Speed to a significant drop the temperature so that in the second Roll stand 7 of the further deformation device a insufficient deformation temperature, so it can if necessary, another intermediate heating in the form of a second induction furnace 8 between the roll stands 6 and 7 can be provided, which can be shorter than the furnace 5.
  • the second induction furnace is only required if the furnace 5 is insufficient, around during the deformation along the whole the three rolling stands 6, 7 and 9 existing others Deformation device the corresponding temperature gradient adjust, in such a way that when tapping in the last mill stand 9 the temperature inside the order of magnitude sufficient for good deformation lies.
  • band 2 ' 2 the desired thickness.
  • the process ends either by reeling the rolled strip 2 'on the reel 11 and the severing at 10 after reaching the desired fret or "Coil" weight or with the severing of the tape 2 ' in the desired lengths and then stacked from a stacking device 14, which is schematic in FIG. 2 is drawn.
  • the device for severing the tape 10 at the beginning of the work cycle also to separate the Start-up string (not shown here) used be turned off after going through the Induction furnace 5 and the disassembled rollers the deformation device 6, 7 and 9, as well as the possibly provided and also switched off Intermediate heating device 8 is separated.
  • Appropriate adjustment devices are provided with those immediately after passing through the starting line the rollers on those needed for the deformation normal roll gap are started again.
  • the heating devices 5 continue to set preferably from mutually independent zones together so that, starting from the state of being turned off Oven the one through which the approach piece passes Oven zones switched on one by one to warm up become.
  • Figure 2 shows the schematic representation of the individual sections for a system according to FIG. 1 (using the same names) the temperature curve of flat product 2 until exit of the band 2 'from the last rolling stand. Below a table is shown from the graph that in accordance with certain sections of the plant and the corresponding sections of the Band the respective speed at the appropriate Thickness can be seen. The recorded values were experimentally with a tape of 1000 mm width and 25 mm thick. Of course, at different dimensions and speeds another Temperature curve to be recorded.
  • the partially rolled strip falls in one intermediate inductive furnace 8 of 1020 degrees C. heated to 1120 degrees C.
  • the first rolling stand is the next Deforming device previous heating and if necessary, between the first and further rolling stands intermediate heating to be set so that heating the flat product or the rolled strip after the first stitch to a temperature of approx. 1100 degrees C takes place and the temperature level like this is held that the final rolling temperature in the last Roll stand does not fall below the limit of 860 degrees C.
  • the an additional induction furnace 8 can be installed.
  • the finished bundle will at 11, e.g. on a downcoiler.

Description

Die Erfindung betrifft ein Verfahren zur kontinuierlichen Herstellung von Bandstahl oder Stahlblech aus nach dem Bogenstranggießverfahren mit horizontaler Auslaufrichtung hergestellten Flachprodukten.The invention relates to a process for continuous Manufacture of steel strip or sheet steel from according to the Continuous sheet casting process with horizontal outlet direction manufactured flat products.

In der Stahlindustrie, sei es aus einer allgemeinen Tendenz heraus oder mit dem Ziel der Überwindung der Krise, der sich in den vergangenen Jahren besonders die Betreiber überalterter Anlagen gegenübersahen, besteht eine starke Notwendigkeit zur Senkung der Betriebs- und Investitionskosten bei gleichzeitiger Verbesserung der Produktqualität und Steigerung der Flexibilität bezogen auf die produzierten Mengeneinheiten, also die sogenannten "Coils" bzw. Stahlbleche. Mit der Modernisierung bestehender Stahlwerke bzw. der Planung und Realisierung neuer Stahlwerke mit Hilfe neuer technologischer Konzepte und Einrichtungen wird eine Steigerung der Produktivität und der Wirtschaftlichkeit bei gleichzeitiger Verbesserung der Produktqualität sowie ein größerer Spielraum bei der "Stückgröße" angestrebt, in der das Endprodukt zwecks optimaler Streubreite der Verwendungsmöglichkeiten ausgestoßen werden soll. In the steel industry, be it from a general one Tendency out or with the aim of overcoming the Crisis that has been particularly severe in recent years faced the operators of outdated plants, there is a strong need to lower the Operating and investment costs with simultaneous Improve product quality and increase the Flexibility based on the units of measure produced, so the so-called "coils" or steel sheets. With the modernization of existing steelworks or the planning and implementation of new steelworks Help with new technological concepts and facilities will increase productivity and economy while improving the Product quality as well as greater scope at "Piece size" is aimed at in which the end product is intended optimal range of possible uses to be expelled.

Eine der neuen Technologien, die im Hinblick auf die aktuellen Anforderungen an die Stahlproduktion zur Zeit vorangetrieben werden, betrifft die Bearbeitungsstufen zwischen dem Schmelzen des Stahls und dem Aufhaspeln des Bandstahls in Form von Rollen oder "Coils" bzw. dem Stapeln von Blechen und umfaßt das Gießen von Dünnbrammen in endabmessungsnaher Dicke, die sodann in nur wenigen nachfolgenden Stichen bzw. Verformungsschritten zum gewünschten Endprodukt weiterverarbeitet werden können. Dies hat zu beachtenswerten Verbesserungen in der Stranggießtechnik geführt, besonders im Hinblick auf die Konstruktion der Kokille sowie des entsprechenden Tauchausgusses, sowie zu Verbesserungen in der Konstruktion der Walzgerüste und -straßen mit dem Ziel, in möglichst wenigen Stichen die angestrebte Verformung zu erreichen.One of the new technologies in terms of the current requirements for steel production currently being processed concerns the processing stages between the melting of the steel and reeling the steel strip in the form of rolls or "coils" or the stacking of sheets and comprises the casting of thin slabs close to their final dimensions Thickness, which then followed in just a few Stitches or deformation steps to the desired one End product can be processed further. this has remarkable improvements in continuous casting technology led, especially in terms of construction the mold and the corresponding immersion spout, as well as improvements in construction of the rolling stands and lines with the aim of in as far as possible a few stitches to achieve the desired deformation.

Es sind -wenn auch unter der Bezeichnung "Pilotanlagen"-Anlagen zur Herstellung von Bandstahl bekannt geworden, in denen nach dem Stranggießverfahren Dünnbrammen von ca, 50 mm Dicke produziert werden, gegenüber herkömmlichen Brammen mit einem Dickenbereich von 150 bis 320 mm. Diese Dünnbrammen durchlaufen hierbei auf unterschiedliche Weise die aufeinanderfolgenden Walz-/Verarbeitungsschritte; das Endprodukt ist Bandstahl von nur wenigen Millimetern Dicke. Es wurde vorgeschlagen, bereits das Gießprodukt -unmittelbar nach einer Zwischenerwärmung in einem Ofen- auszuwalzen, z.B. in einer Tandemstraße mit sechs Gerüsten. There are - if also under the name "pilot plants" plants known for the production of steel strip, in which thin slabs of approx. 50 mm thick are produced compared to conventional ones Slabs with a thickness range of 150 up to 320 mm. These thin slabs pass through here the successive ones in different ways Rolling / processing steps; is the end product Steel strip only a few millimeters thick. It was already proposed the casting product -immediately after intermediate heating in an oven, e.g. in a tandem mill with six stands.

Da die Gießgeschwindigkeit nicht viel schneller als ca. 5 m/min. sein kann, ergeben sich dementsprechend am letzten Gerüst der Walzstraße zu niedrige Walzgeschwindigkeiten, um die erforderlichen Endwalztemperaturen von mindestens ca. 865 Grad C beibehalten zu können. D.h., das Band erfährt zwischen einer Walzstufe und der darauffolgenden eine zu starke Abkühlung aufgrund der mit der Gießgeschwindigkeit identischen geringen Geschwindigkeit beim Eintritt in die Walzstraße. Man ist deshalb von dieser Lösung abgerückt, weil auch mit Wärmeschutzeinrichtungen und beheizten Walzen das Problem nicht wirtschaftlich lösbar war; denn dies hätte einen erheblichen Anstieg der Investitions-und Betriebskosten zur Folge.Since the casting speed is not much faster than approx. 5 m / min. can arise accordingly too low rolling speeds on the last stand of the rolling mill, the required final rolling temperatures of at least approx. 865 degrees C. to be able to. That is, the strip experiences between a rolling stage and the subsequent cooling down too much due to the identical with the casting speed low speed when entering the rolling mill. So you moved away from this solution because also with heat protection devices and heated Rolling the problem was not economically solvable; because this would have a significant increase in investment and Operating costs.

Ein anderer Lösungsvorschlag sieht das Abtrennen des Bandes vor einem Wärmeofen vor, in dem anschließend die Wärmebehandlung (Ausgleich der Temperatur) des Bandes über seinen gesamten Querschnitt vorgenommen wird. Dies kann z.B. ein gasbeheizter Rollenofen sein, mit dem unabhängig von der zu berücksichtigenden Gießgeschwindigkeit am Ofenaustritt eine Bandtemperatur von ca. 1100 Grad C eingestellt werden kann, also eine für den nachfolgenden Walzprozeß optimale Temperatur. Das Band wird auf eine Standardlänge geschnitten, die beispielsweise für ein bestimmtes Coilgewicht bei 50 m liegen kann, wofür eine entsprechende Ofenlänge von ca. 150 m benötigt wird, wenn man die erforderliche Pufferwirkung in Betracht zieht. Another solution is to separate the Tape in front of a heating oven, in which subsequently the heat treatment (temperature compensation) of the Band made over its entire cross section becomes. This can e.g. be a gas heated roller oven, with the irrespective of the casting speed to be taken into account a strip temperature at the furnace outlet 1100 degrees C can be set, so an optimal temperature for the subsequent rolling process. The tape is cut to a standard length, for example for a specific coil weight can be at 50 m, for which a corresponding Oven length of approx. 150 m is required if you consider the takes into account the required buffering effect.

Durch Entkopplung der Walzstraße vom eigentlichen Gießvorgang, kann das Auswalzen der Dünnbramme bzw. des "Vorbandes" bei höheren Geschwindigkeiten durchgeführt werden, und somit ist ein Abfallen der Temperatur unter die für die Endwalzstufe zulässige Mindesttemperatur nicht zu befürchten. Dabei ergibt sich aus der Überlänge des Ofens -die ungefähr das 3-fache der Länge des Bandabschnittes beträgt- außer dem erheblichen Anstieg der Anlagen-Investitionskosten noch ein enormer Platzbedarf, auf den viele Stahlwerke nicht eingerichtet sind.By decoupling the rolling mill from the actual one Pouring process, the rolling of the thin slab or of the "opening act" at higher speeds become, and thus there is a drop in temperature below the permissible for the final rolling stage Minimum temperature not to be feared. Here results from the excess length of the furnace -that about that 3 times the length of the band section is - except the considerable increase in investment costs for the plant another enormous space requirement, on which many Steelworks are not set up.

Darüber hinaus setzen die Abmessungen der Anlage und somit des Ofens der Länge der aufeinanderfolgenden zu behandelnden Bandabschnitte Grenzen und damit auch für das endgültige Bundgewicht, was wiederum den Nutzungsspielraum im Hinblick auf die Fertigung von Coils mit größtem Durchmesser begrenzen. Dementsprechend bietet sich bei einer Anlage dieser Art auch nicht die Möglichkeit, noch dünnere Ausgangsbrammen einzusetzen, sollte dies durch die technologische Weiterentwicklung des Stranggießverfahrens möglich werden. Bei Annahme einer Ausgangsdicke von 25 mm -wie dies bereits hypothetisch getan wurde-an Stelle von 50 mm müßte zur Verwirklichung desselben Bund-Endgewichtes das Band in Längen von ca. 100 m aufgeteilt werden, wofür für den Behandlungsofen eine Länge in der Größenordnung von ca. 300 m vorgesehen werden müßte, was praktisch und wirtschaftlich nicht durchführbar ist. In addition, the dimensions of the system and hence the length of the successive furnace band sections to be treated limits and thus also for the final coil weight, which in turn is the Freedom of use with regard to the production of Limit coils with the largest diameter. Accordingly offers itself with a plant of this kind also not the possibility of even thinner starting slabs should use this through the technological Further development of the continuous casting process become possible. Assuming an initial thickness of 25 mm - as already hypothetically done Place of 50 mm would have to be realized Final weight of the belt in lengths of approx. 100 m can be divided, for what for the treatment furnace a length of the order of about 300 m should be provided, which is practical and economical is not feasible.

Das Ziel der vorliegenden Erfindung ist die Schaffung eines Verfahrens der eingangs beschriebenen Art sowie einer entsprechenden Anlage zur Durchführung dieses Verfahrens, mit der kontinuierlich Stahlband aus von einer Bogenstranggießanlage kommenden Flachprodukt hergestellt werden kann, ohne die vorgenannten Nachteile zu übernehmen.The aim of the present invention is to create a method of the type described above and a corresponding system for carrying out this Process with which steel strip is continuously made from a flat product coming from a continuous caster can be produced without the aforementioned disadvantages to take over.

Insbesondere soll auf ein Trennen des Strangs zwischen dem Gießvorgang und mindestens dem ersten Walzvorgang verzichtet werden, wobei der Anstich des Gießstranges im ersten Walzgerüst mit derjenigen Geschwindigkeit erfolgt, mit dem das Walzgut die Bogenstrecke der Stranggießanlage verläßt. Das Verfahren soll somit "in line" mit praktisch unbegrenzter Flexibilität durchgeführt werden, so daß es möglich wird, Coils von beliebigem Gewicht und beliebiger Länge oder Bleche herzustellen, ohne die Dimensionsparameter der Anlage zu verändern, da das Abtrennen des ausgewalzten Bandes mindestens nach dem ersten Walzvorgang oder nach Durchführung aller Arbeitsgänge unmittelbar vor der Aufhaspel- oder Stapelvorrichtung vorgenommen wird.In particular, the aim is to separate the strand between the casting process and at least the first rolling process be dispensed with, tapping the casting strand in the first mill stand at that speed takes place with which the rolling stock the arc section of the continuous caster leaves. The process should therefore be "in line" done with virtually unlimited flexibility so that it becomes possible to use coils of any type Manufacture weight and any length or sheet, without changing the dimensional parameters of the system, since the cutting off of the rolled strip is at least after the first rolling process or after execution all operations immediately before the reel or Stacking device is made.

Gelöst wird die Aufgabe durch ein Verfahren, gemäß Anspruch 1. The object is achieved by a method according to claim 1.

Man kann das ausgewalzte Band entsprechend dem gewünschten Bundgewicht im Anschluß an das Verformen des Flachproduktes aufhaspeln oder nach Abtrennen des ausgewalzten Bandes im Anschluß an die Verformung des Flachproduktes in vorgegebenen Längen zu Stahlblechpaketen stapeln, ggf. nach Abkühlen und Richten. Das Flachprodukt wird also zunächst in einem ersten Walzgerüst mit der Ausgangsgeschwindigkeit des Produktes aus der Bogenstranggießanlage angestochen und durchläuft die aufeinanderfolgenden Walzstufen jeweils mit Geschwindigkeiten, die den Verformungen in den einzelnen Stichen entsprechen. Das derartig gewalzte Band wird anschließend entweder aufgehaspelt und, nachdem das gewünschte Coil-Gewicht erreicht ist, abgetrennt oder das Band wird in gewünschte Längen unterteilt und zu Blechen gestapelt. You can do the rolled out Tape according to the desired coil weight in the connection reel on the deformation of the flat product or after cutting off the rolled strip to the deformation of the flat product in given Stack lengths into sheet steel packages, if necessary after cooling and straightening. So the flat product is first in a first roll stand at the initial speed of the product from the continuous sheet caster stabbed and runs through the successive Rolling stages each with speeds that correspond to the deformations in the individual stitches. The strip thus rolled is then either coiled up and after the desired coil weight is reached, cut off or the tape is in desired Lengths divided and stacked into sheets.

Ein wesentlicher Aspekt der vorliegenden Erfindung ist das induktive Wiederaufheizen des Flachproduktes nach dem Entzundern auf Temperaturen von ca. 1100 Grad C mit bestmöglichem Temperaturausgleich, weil so einer Unterkühlung des Bandes in günstiger Weise entgegengewirkt werden kann.An essential aspect of the present invention is the inductive reheating of the flat product after descaling to temperatures of approx. 1100 degrees C. with the best possible temperature compensation, because such a Countercooling of the belt counteracted in a favorable manner can be.

In einer weiteren Ausgestaltung der Erfindung ist vorgesehen, eine oder mehrere Stufen der induktiven Zwischenerwärmung des Flachproduktes zwischen den genannten Verformungsstufen vorzusehen. Durch diese Zwischenerwärmung wird ebenfalls einer zu starken Abkühlung des Walzgutes entgegengewirkt, so daß stets die notwendigen Walztemperaturen derart eingestellt werden können, daß in der letzten Verformungsstufe die Temperaturen nicht unter den Grenzwert von 860 Grad C absinken.In a further embodiment of the invention, one or more levels of inductive Intermediate heating of the flat product between the above Deformation stages to be provided. Through this Intermediate heating also becomes too strong Cooling of the rolling stock counteracted, so that always the necessary rolling temperatures are set in this way can be that in the last stage of deformation Temperatures not below the limit of 860 degrees Celsius sink.

Nach einem anderen Vorschlag der Erfindung sind zusätzlich folgende Schritte vorgesehen;

  • Einstellen der Verformungsstufen nach Durchlauf eines Anfahrstranges, der beim Gießvorgang vorgesehen wird;
  • Abtrennen des Anfahrstranges unmittelbar vor dem Aufhaspeln des Bandes oder vor dem Stapeln der Bleche;
  • Differenzierte Heizregelung in aufeinanderfolgenden Stufen/Zonen nach Durchlauf des Anfahrstranges.
According to another proposal of the invention, the following steps are additionally provided;
  • Setting the deformation levels after passing through a start-up strand, which is provided during the casting process;
  • Cutting off the start-up strand immediately before reeling up the strip or before stacking the sheets;
  • Differentiated heating control in successive stages / zones after passing through the start-up line.

Der Anfahrstrang kann nach Durchlauf durch die Walzgerüste mit derjenigen Einrichtung abgetrennt werden, die zum Unterteilen der gewalzten Bänder ohnehin vorhanden ist, oder er kann durch eine weitere Trennvorrichtung hinter der ersten Verformungsstufe abgetrennt werden.The run-up strand can be run through the roll stands be separated with that facility, those for dividing the rolled strips are available anyway is, or it can by another separation device separated behind the first stage of deformation become.

Die Anlage zur Durchführung des erfindungsgemäßen Verfahrens ist im Anspruch 7 angegeben. The plant for performing the method according to the invention is specified in claim 7.

Die Trennvorrichtung kann hinter der ersten Verformungseinrichtung angeordnet sein und zwischen der ersten Verformungseinrichtung und der weiteren Verformungseinrichtung kann eine Einrichtung zum Auf- und Abhaspeln des Flachproduktes vorgesehen sein, der die Trenneinrichtung vorgeordnet ist. Vorzugsweise ist die Einrichtung zum Auf- und Abhaspeln des Flachproduktes hinter der Vorrichtung zum induktiven Aufheizen und vor der weiteren Verformungseinrichtung angeordnet.The separating device can be behind the first deformation device be arranged and between the first deformation device and the further deformation device can be a device for opening and closing Uncoiling of the flat product may be provided, which precedes the separating device. Preferably is the device for winding and unwinding the Flat product behind the device for inductive Heating up and in front of the further shaping device arranged.

Alternativ ist erfindungsgemäß dieser Anlage entweder eine Abtrennvorrichtung für das Walzband und mindestens ein Haspel zum Aufhaspeln des Bandes nachgeordnet oder eine Abtrenneinrichtung für das Walzband, eine Kühleinrichtung, eine Richtmaschine und eine Stapelvorrichtung für die abgetrennten Bleche.Alternatively, according to the invention, this system is either a separation device for the rolled strip and downstream of at least one reel for reeling the tape or a separation device for the rolled strip, a cooling device, a straightening machine and a stacking device for the separated sheets.

In einer weiteren Ausgestaltung der Erfindung umfaßt die Anlage zusätzlich mindestens eine Vorrichtung zum induktiven Aufheizen zur Zwischenerwärmung zwischen den weiteren Walzgerüsten.In a further embodiment of the invention the system additionally at least one device for inductive heating for intermediate heating between the other rolling stands.

Günstigerweise ist jede dieser Vorrichtungen mit separat steuerbaren Heizstufen versehen. Conveniently, each of these devices is separate controllable heating levels.

Entsprechend einer Ausgestaltung der Erfindung ist die Anlage außerdem mit Vorrichtungen zur Einstellung des Durchlaufquerschnittes zwischen den Rollen der ersten Verformungseinrichtung und den weiteren Walzgerüsten ausgestattet, um den Durchlauf des am Kopf des Gießstranges sitzenden Anfahrstranges zu ermöglichen und unmittelbar nach dessen Durchlauf die Querschnitte wieder auf die üblichen Durchlaufwerte zurückzuführen. Vorrichtungen zur sukzessiven Steuerung der einzelnen Aufheizstufen der Öfen unmittelbar nach dem Durchlauf des Anfahrstranges, wobei die Trennvorrichtung zum Abtrennen des Anfahrstranges diejenige ist, die auch zum Abtrennen des Walzbandes eingesetzt wird, nämlich die am Endabschnitt der Anlage befindliche Trennvorrichtung.According to an embodiment of the invention the system also with adjustment devices of the flow cross section between the roles of first deformation device and the other rolling stands equipped to the flow of the head to enable the starting strand of the casting strand to sit and immediately after its passage the Cross sections back to the usual throughput values attributed. Successive control devices of the individual heating levels of the ovens immediately after passing through the start-up line, the Disconnect device for separating the start-up line is the one that is also used to cut off the rolled strip is used, namely that at the end portion of the Separating device in the system.

Nach einem anderen Vorschlag der Erfindung wird die Trennvorrichtung zum Abtrennen des Anfahrstranges verwendet, die sich hinter der ersten Verformungsstufe befindet.According to another proposal of the invention, the Disconnect device for separating the start-up line used, which is behind the first stage of deformation located.

Zur Erläuterung der Erfindung wird nachfolgend ein Ausführungsbeispiel beschrieben, das in Zeichnungen dargestellt ist.To explain the invention, a Embodiment described that in drawings is shown.

Es zeigt:

  • Fig. 1 eine schematische Teildarstellung der erfindungsgemäßen Anlage und
  • Fig. 2 den Temperaturverlauf des Stahlbandes.
    • It shows:
  • Fig. 1 is a schematic partial representation of the system according to the invention and
  • Fig. 2 shows the temperature profile of the steel strip.

    • In der Zeichnung ist grob schematisch die erfindungsgemäße Anlage dargestellt, anhand der das entsprechende Verfahren beschrieben wird. Ausgehend von einer Strangguß-Kokille, die in der Zeichnung mit 1 gekennzeichnet ist, entsteht das Flacherzeugnis 2. Das in herkömmlichen Stützrollen geführte und transportierte Flachprodukt 2 geht von der anfänglichen vertikalen Richtung über die von den Stützrollen gebildete Bogenstrecke in die horizontale Lage über. Nach Durcherstarrung, nämlich im Endbereich der Bogenstrecke, durchläuft das Flachprodukt gemäß der Erfindung eine erste Verformungsstufe 3, in der es beispielsweise auf eine Dicke von maximal 25 mm gebracht wird. Die Verformungsstufe 3 kann aus einer oder mehreren Walzeinrichtungen, vorzugsweise in Quarto-Anordnung, bestehen.In the drawing, the invention is roughly schematic System shown, based on which the corresponding Procedure is described. Starting from a continuous casting mold, marked with 1 in the drawing is the flat product 2. That in conventional Support rollers guided and transported flat product 2 goes from the initial vertical direction over the arc path formed by the support rollers in the horizontal position. After solidification, namely in the end area of the arc, that goes through Flat product according to the invention a first stage of deformation 3, for example, to a thickness of is brought to a maximum of 25 mm. Deformation stage 3 can consist of one or more rolling devices, preferably in quarto order.

    Zum Temperaturausgleich ist im Anschluß ein Ofen 5 vorgesehen, der mit einer induktiven Aufheizvorrichtung ausgestattet ist. In diesem Ofen 5 erfolgt gleichzeitig ein Temperaturausgleich über den gesamten Querschnitt des Flachproduktes 2, so daß dieses das erste Gerüst 6 der weiteren Verformungseinrichtung mit ausreichender Walztemperatur erreicht. A furnace 5 is subsequently provided for temperature compensation, the one with an inductive heating device Is provided. In this oven 5 is done at the same time a temperature compensation over the entire Cross section of the flat product 2, so that this the first frame 6 of the further deformation device reached with sufficient rolling temperature.

    Sollte eine zu langsame Anstichgeschwindigkeit entsprechend der beim Austritt aus der Bogenstrecke gefahrenen Geschwindigkeit zu einem beträchtlichen Absinken der Temperatur führen, so daß sich im zweiten Walzgerüst 7 der weiteren Verformungseinrichtung eine unzureichende Verformungstemperatur ergibt, so kann ggfs. eine weitere Zwischenerwärmung in Form eines zweiten Induktionsofens 8 zwischen den Walzgerüsten 6 und 7 vorgesehen werden, der kürzer sein kann als der Ofen 5. Der zweite Induktionsofen ist jedoch nur dann erforderlich, wenn der Ofen 5 nicht ausreicht, um während der Verformung entlang der gesamten, aus den drei Walzgerüsten 6, 7 und 9 bestehenden weiteren Verformungseinrichtung das entsprechende Temperaturgefälle einzustellen, und zwar derart, daß beim Anstich in das letzte Walzgerüst 9 die Temperatur innerhalb der für eine gute Verformung ausreichenden Größenordnung liegt. Beim Austritt aus dem letzten Walzgerüst 9 weist das nun als Band 2' bezeichnete Flachprodukt 2 die gewünschte Dicke auf.If the tapping speed is too slow, this is appropriate the one driven when exiting the arc Speed to a significant drop the temperature so that in the second Roll stand 7 of the further deformation device a insufficient deformation temperature, so it can if necessary, another intermediate heating in the form of a second induction furnace 8 between the roll stands 6 and 7 can be provided, which can be shorter than the furnace 5. However, the second induction furnace is only required if the furnace 5 is insufficient, around during the deformation along the whole the three rolling stands 6, 7 and 9 existing others Deformation device the corresponding temperature gradient adjust, in such a way that when tapping in the last mill stand 9 the temperature inside the order of magnitude sufficient for good deformation lies. When leaving the last roll stand 9 shows the flat product now referred to as band 2 ' 2 the desired thickness.

    Das Verfahren schließt entweder mit dem Aufhaspeln des gewalzten Bandes 2' auf dem Haspel 11 und dem Abtrennen bei 10 nach Erreichen des gewünschten Bund- oder "Coil"-Gewichts oder mit den Abtrennen des Bandes 2' in gewünschten Längen und anschließendem Stapeln auf einer Stapeleinrichtung 14 ab, die in Fig. 2 schematisch eingezeichnet ist. The process ends either by reeling the rolled strip 2 'on the reel 11 and the severing at 10 after reaching the desired fret or "Coil" weight or with the severing of the tape 2 ' in the desired lengths and then stacked from a stacking device 14, which is schematic in FIG. 2 is drawn.

    Ohne die Notwendigkeit zusätzlicher Trennvorrichtungen kann die Vorrichtung zum Abtrennen des Bandes 10 zu Beginn des Arbeitstaktes auch zum Abtrennen des (hier nicht dargestellten) Anfahrstranges benutzt werden, der nach Durchlaufen des ausgeschalteten Induktionsofens 5 und der auseinandergefahrenen Walzen der Verformungseinrichtung 6, 7 und 9 -sowie der eventuell vorgesehenen und ebenfalls abgeschalteten Zwischenerwärmungseinrichtung 8- abgetrennt wird. Es sind entsprechende Anstellvorrichtungen vorgesehen, mit denen unmittelbar nach Durchlaufen des Anfahrstranges die Walzen auf den für die Verformung benötigten normalen Walzspalt wieder angestellt werden. Weiterhin setzen sich die Aufheizvorrichtungen 5 vorzugsweise aus untereinander unabhängigen Zonen zusammen, so daß ausgehend vom Zustand des abgeschalteten Ofens die jeweils vom Anfahrstück durchlaufenen Ofenzonen nacheinander zum Aufwärmen eingeschaltet werden.Without the need for additional separators the device for severing the tape 10 at the beginning of the work cycle also to separate the Start-up string (not shown here) used be turned off after going through the Induction furnace 5 and the disassembled rollers the deformation device 6, 7 and 9, as well as the possibly provided and also switched off Intermediate heating device 8 is separated. Appropriate adjustment devices are provided with those immediately after passing through the starting line the rollers on those needed for the deformation normal roll gap are started again. The heating devices 5 continue to set preferably from mutually independent zones together so that, starting from the state of being turned off Oven the one through which the approach piece passes Oven zones switched on one by one to warm up become.

    Figur 2 zeigt anhand der schematischen Darstellung der einzelnen Abschnitte für eine Anlage gemäß der Figur 1 (unter Verwendung gleicher Bezeichnungen) den Temperaturverlauf des Flachproduktes 2 bis zum Austritt des Bandes 2' aus dem letzten Walzgerüst. Unterhalb des Kurvenbildes ist eine Tabelle dargestellt, aus der in Übereinstimmung mit bestimmten Abschnitten der Anlage und den entsprechenden Abschnitten des Bandes die jeweilige Geschwindigkeit bei entsprechender Dicke ersichtlich ist. Die aufgezeichneten Werte wurden versuchsweise mit einem Band von 1000 mm Breite und 25 mm Dicke erzielt. Selbstverständlich wird bei anderen Abmessungen und Geschwindigkeiten ein anderer Temperaturverlauf zu verzeichnen sein.Figure 2 shows the schematic representation of the individual sections for a system according to FIG. 1 (using the same names) the temperature curve of flat product 2 until exit of the band 2 'from the last rolling stand. Below a table is shown from the graph that in accordance with certain sections of the plant and the corresponding sections of the Band the respective speed at the appropriate Thickness can be seen. The recorded values were experimentally with a tape of 1000 mm width and 25 mm thick. Of course, at different dimensions and speeds another Temperature curve to be recorded.

    Aus der Figur ergibt sich, daß das aus dem Gießwalzvorgang hervorgegangene Flacherzeugnis 2 beim Austritt aus der ersten Verformungsstufe 3 eine Temperatur von 1075 Grad C aufweist, die auf dem Weg zur Entzunderungsvorrichtung 4 auf 1049 Grad C absinkt. Bedingt durch die bei dieser Anordnung vorgesehene Preßwasser-Entzunderung sinkt die Temperatur jäh auf 969 Grad C ab und kühlt bis zum Ofen 5 weiter auf 934 Grad C ab.From the figure it follows that this is from the casting and rolling process resulting flat product 2 at the exit a temperature from the first deformation stage 3 of 1075 degrees C on the way to the descaling device 4 drops to 1049 degrees C. Due to the provided in this arrangement Press water descaling suddenly drops the temperature to 969 degrees C and continue cooling to oven 5 to 934 degrees C.

    In der induktiven Aufheizvorrichtung 5 steigt die Temperatur wieder bis auf 1134 Grad C an, wobei ein Temperaturausgleich über den gesamten Querschnitt des Flachproduktes erfolgt. Letzteres erfährt vor Erreichen des Walzgerüstes 6 eine Abnahme der Temperatur auf 1104 Grad C, die infolge des Kontaktes mit den Walzen im Walzgerüst beim Austritt aus dem Walzgerüst nur noch 1063 Grad C beträgt. Im geschilderten Fall wird das teilgewalzte Band in einem zwischengeschalteten induktiven Ofen 8 von 1020 Grad C auf 1120 Grad C aufgeheizt. In the inductive heating device 5 the temperature rises again to 1134 degrees C, temperature compensation across the entire cross-section of the flat product. The latter experiences before reaching the rolling stand 6, a decrease in Temperature to 1104 degrees C resulting from the contact with the rollers in the roll stand as it exits the Roll stand is only 1063 degrees C. In the described The partially rolled strip falls in one intermediate inductive furnace 8 of 1020 degrees C. heated to 1120 degrees C.

    Beim Anstich in das zweite Walzgerüst 7 liegt die Temperatur bei 1090 Grad C und sinkt beim Verlassen des Walzgerüstes wieder auf 1053 Grad C ab, bis sie bei Eintritt in das dritte und letzte Walzgerüst 9 auf 988 Grad C abgefallen ist. Diese Temperatur ist als Anstichtemperatur für den letzten Walzvorgang ausreichend; das Walzgut 2' verläßt das letzte Walzgerüst 9 mit einer Temperatur von 953 Grad C und wird danach bei noch weiter abgesunkener Temperatur in gewünschten Längen abgetrennt und gestapelt oder wie in Fig. 1 dargestellt aufgehaspelt.When tapping into the second roll stand 7 is the Temperature at 1090 degrees C and decreases when leaving of the rolling stand again to 1053 degrees C until it when entering the third and last roll stand 9 has dropped to 988 degrees C. This temperature is as the piercing temperature for the last rolling process sufficient; the rolling stock 2 'leaves the last rolling stand 9 with a temperature of 953 degrees C and will then at a further reduced temperature in the desired Lengths separated and stacked or as in Fig. 1 shown coiled.

    Was den Geschwindigkeitsverlauf anbelangt, so liegt im Ausführungsbeispiel die beim Verlassen der ersten Verformungsstufe 3 gefahrene Geschwindigkeit bei 0,08 m/sec. oder 4,8 m/min. Dies entspricht der Anstichgeschwindigkeit beim Eintritt in das Walzgerüst der weiteren Verformungseinrichtung, wo die Dicke des Flacherzeugnisses noch 25 mm beträgt. Die Anstichgeschwindigkeit bei Eintritt in das Walzgerüst 7 liegt bei 10,2 m/min. bei gleichzeitiger Verformung des Flachproduktes von 25 mm auf 12,3 mm. In das letzte Walzgerüst tritt das Walzgut mit einer Geschwindigkeit von 19,8 m/min. und einer Dicke von 6,2 mm ein und verläßt das Walzgerüst mit einer Fertigdicke von 4,05 mm und einer Geschwindigkeit von 30,6 m/min. As far as the speed curve is concerned in the exemplary embodiment when leaving the first Deformation level 3 speed at 0.08 m / sec. or 4.8 m / min. This corresponds to the piercing speed when entering the mill stand another deformation device where the thickness of the Flat product is still 25 mm. The tapping speed upon entry into the roll stand 7 at 10.2 m / min. while deforming the Flat product from 25 mm to 12.3 mm. In the last one Roll stand enters the rolling stock at a speed of 19.8 m / min. and a thickness of 6.2 mm and leaves the mill stand with a finished thickness of 4.05 mm and a speed of 30.6 m / min.

    Wie aus dem vorgenannten Ausführungsbeispiel, das im Prinzip auf andere Bandquerschnitte übertragbar ist, hervorgeht, ist die dem ersten Walzgerüst der weiteren Verformungseinrichtung vorausgehende Erwärmung und ggfs. zwischen dem ersten und weiteren Walzgerüsten erfolgende Zwischenerwärmung so einzustellen, daß eine Aufheizung des Flachproduktes bzw. des Walzbandes nach dem ersten Stich auf eine Temperatur von ca. 1100 Grad C stattfindet und das Temperaturniveau so gehalten wird, daß die Endwalztemperatur im letzten Walzgerüst den Grenzwert von 860 Grad C nicht unterschreitet. As from the aforementioned embodiment, which in Principle can be transferred to other belt cross-sections, the first rolling stand is the next Deforming device previous heating and if necessary, between the first and further rolling stands intermediate heating to be set so that heating the flat product or the rolled strip after the first stitch to a temperature of approx. 1100 degrees C takes place and the temperature level like this is held that the final rolling temperature in the last Roll stand does not fall below the limit of 860 degrees C.

    Falls erforderlich, kann zwischen den Walzgerüsten der weiteren Verformungseinrichtung ein zusätzlicher Induktionsofen 8 eingebaut werden. Der fertige Bund wird bei 11, z.B. auf einem Downcoiler, erzeugt.If necessary, the an additional induction furnace 8 can be installed. The finished bundle will at 11, e.g. on a downcoiler.

    Selbstverständlich lassen sich alle Parameter der Anlage durch entsprechende Einstellung der Gießgeschwindigkeit, der Walzgeschwindigkeiten sowie der Verformungen untereinander beeiflussen.Of course, all parameters of the system can be by setting the casting speed accordingly, the rolling speeds and the deformations among each other influence.

    Die vorstehende Beschreibung der Erfindung erläutert ein Verfahren sowie die für die Durchführung erforderliche Anlage, die ein kontinuierliches Gießen und Endwalzen eines Ausgangsproduktes bei geringen Anlagenkosten und Energieaufwand ermöglichen. Es wurde festgestellt, daß die für die induktive Erwärmung erforderliche Heizleistung die Grenzen von ca. 8 MW nicht übersteigt, was für ein Stahlwerk entsprechender Größenordnung als durchaus wirtschaftlich angesehen werden kann.The foregoing description of the invention has been explained a procedure as well as the one necessary for the implementation Plant that has a continuous casting and finish rolling an output product with low system costs and enable energy consumption. It was determined, that the necessary for inductive heating Heating output does not exceed the limits of approx. 8 MW, what a steel mill of the right size are considered to be quite economical can.

    Claims (15)

    1. A process for the continuous production of strip steel or steel sheet from thin slabs approximately 50 mm thick made by the circular arc-type continuous casting process with horizontal run-out direction, which process exhibits the following phases:
      a) rolling of the thin slabs (2) after the billet has rigidified without prior separation in a first rolling stage (3) in an arc-shaped guide stand at temperatures higher than 1100°C,
      b) inductive re-heating to a temperature of approximately 1100°C with the best possible temperature equalization over the whole cross-section of the thin slab,
      c) rolling of the thin slab in at least one further rolling stage at rolling speeds corresponding to the respective reduction per pass.
    2. A process according to claim 1, characterized by winding up of the rolled out strip and separation in accordance with the desired coil weight subsequent to rolling of the thin slab.
    3. A process according to claim 1, characterized by separation of the rolled out strip, subsequent to rolling of the thin slab, into predetermined lengths and stacks to form steel sheet bundles optionally after cooling and dressing.
    4. A process according to any one of claims 1 to 43 characterized by one or more stages of intermediate inductive heating of the thin slab between the subsequent rolling stages.
    5. A process according to any one of the preceding claims, including the following further stages:
      adjustment of the rolling stages after passage of a starting billet, which is provided in the casting process;
      separation of the starting billet immediately before winding up of the strip or separation of the sheets;
      differentiated heat regulation in successive stages/zones after passage of the starting billet.
    6. An installation for implementing the process according to claim 1, having the installation parts described below in the sequence indicated:
      a) a mould (1) for continuous casting of thin slabs (2) of approximately 50 mm with adjacent guide stand in the form of an arc,
      b) a first rolling stage for deforming the thin slab in the guide stand,
      c) a device (5) for inductive heating and temperature equalization over the cross-section of the thin slab (2),
      d) at least one further roll stand (6, 7, 9) and
      e) a separating device (S; 10) either after b) or after d).
    7. An installation according to claim 6, characterized in that the separating device (S) is arranged downstream of the first rolling stage (3).
    8. An installation according to either one of claims 6 and 7, characterized in that an apparatus (12) is provided between the first rolling stage (3) and the further roll stands (6, 7, 9) for winding up and unwinding the thin slab, the separating apparatus (S) being arranged upstream of said apparatus (12).
    9. An installation according to claim 8, characterized in that the apparatus (12) for winding up and unwinding the thin slab is arranged downstream of the device (5) for inductive heating and upstream of the further roll stands (6, 7, 9).
    10. An installation according to claim 6, characterized by the downstream arrangement of a separating device (10) for the strip (2') and at least one coiler (11) for winding up the strip (2').
    11. An installation according to claim 6, characterized in that a separating device (10) for the rolled strip (2), a cooling apparatus, a dressing roller and a stacking device (14) for the separated sheets are arranged downstream thereof.
    12. An installation according to claim 6, characterized in that, in addition, at least one device (8) for inductive heating is provided for intermediate heating between the further roll stands (6, 7, 9).
    13. An installation according to claim 12, characterized in that each device (5, 8) for inductive heating comprises separately controllable heating stages.
    14. An installation according to claim 10, characterized by an additional device for adjusting the flow cross-section between the rollers of the rolling apparatus (3) and the further roll stands (6, 7, 9), to enable passage of the starting billet positioned at the head of the cast billet and, immediately after passage of the starting billet, to return the flow cross-section to the values necessary for the rolling processes;
      by devices for control of the individual heating stages of the devices (5, 8) for inductive heating in succession for respective activation immediately after passage of the starting billet
      and, through use of the separating device (10), also for separation of the starting billet from the rolled strip (2').
    15. An installation according to claim 7, characterized by use of the separating device (S) for separation of the starting billet.
    EP89906038A 1988-05-26 1989-05-23 Process for continuous production of steel strip or steel sheet from flat products made by the circular-arc type continuous casting process Expired - Lifetime EP0415987B2 (en)

    Priority Applications (1)

    Application Number Priority Date Filing Date Title
    AT89906038T ATE83409T1 (en) 1988-05-26 1989-05-23 PROCESS FOR THE CONTINUOUS PRODUCTION OF STEEL STRIP OR SHEET FROM FLAT PRODUCTS MADE BY THE ARC CONTINUOUS CASTING PROCESS.

    Applications Claiming Priority (7)

    Application Number Priority Date Filing Date Title
    IT2075288 1988-05-26
    IT20752/88A IT1224318B (en) 1988-05-26 1988-05-26 PROCESS AND PLANT FOR THE CONTINUOUS PRODUCTION OF STEEL BELT
    DE8800629 1988-10-10
    WOPCT/DE88/00629 1988-10-10
    DE3840812A DE3840812A1 (en) 1988-05-26 1988-11-30 METHOD AND SYSTEM FOR THE CONTINUOUS PRODUCTION OF STEEL STRIP OR STEEL SHEET BY THE CONTINUOUS CASTING PROCESS
    DE3840812 1988-11-30
    PCT/DE1989/000332 WO1989011363A1 (en) 1988-05-26 1989-05-23 Process for continuous production of steel strip or steel sheet from flat products made by the circular-arc type continuous casting process

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    EP0415987A1 EP0415987A1 (en) 1991-03-13
    EP0415987B1 EP0415987B1 (en) 1992-12-16
    EP0415987B2 true EP0415987B2 (en) 1999-11-24

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    EP (1) EP0415987B2 (en)
    KR (1) KR950014488B1 (en)
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    BG (1) BG51443A3 (en)
    DE (2) DE3840812A1 (en)
    DK (1) DK171539B1 (en)
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    IT (1) IT1224318B (en)
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    KR100353570B1 (en) * 1996-12-19 2002-09-19 코루스 스타알 베.뷔. Process and device for producing a steel strip or sheet
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    AT504782B1 (en) 2005-11-09 2008-08-15 Siemens Vai Metals Tech Gmbh METHOD FOR PRODUCING A HOT-ROLLED STEEL STRIP AND COMBINED CASTING AND ROLLING MACHINE TO PERFORM THE METHOD
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    CN101336307A (en) * 2006-01-26 2008-12-31 乔瓦尼·阿尔维迪 Hot-rolled bi-phase steel band material having characteristic of cold-rolled band
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    AT506065B1 (en) * 2007-11-22 2009-06-15 Siemens Vai Metals Tech Gmbh METHOD FOR THE CONTINUOUS AUSTENITIC ROLLING OF A PRECONDUCT MADE IN A CONTINUOUS PLANTING PROCESS, AND A COMBINED CASTING AND ROLLING MACHINE TO PERFORM THE METHOD
    PL2346625T3 (en) 2008-10-30 2013-10-31 Siemens Ag Method for setting a run-off thickness for a milled item that passes through a multiple scaffold mill train, control and/or regulating device and mill train
    DE102009018683A1 (en) 2009-04-23 2010-10-28 Sms Siemag Ag Method and device for continuous casting of a slab
    IT1400002B1 (en) 2010-05-10 2013-05-09 Danieli Off Mecc PROCEDURE AND PLANT FOR THE PRODUCTION OF FLAT LAMINATED PRODUCTS
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    ITMI20112292A1 (en) * 2011-12-16 2013-06-17 Arvedi Steel Engineering S P A SUPPORT AND OSCILLATION DEVICE FOR LINGOTTER IN CONTINUOUS CASTING SYSTEMS
    ITMI20120760A1 (en) * 2012-05-07 2013-11-08 Arvedi Steel Engineering S P A PLANT AND PROCEDURE FOR THE PRODUCTION OF A HOT-LAMINATED STEEL RIBBON IN A WIDE DIMENSIONAL RANGE
    RU2643003C1 (en) * 2013-12-26 2018-01-29 Поско Device and method of continuous casting and steel sheet rolling
    DE102014221068A1 (en) 2014-10-16 2016-04-21 Sms Group Gmbh Plant and method for the production of heavy plates
    DE102015223787A1 (en) 2015-10-09 2017-04-13 Sms Group Gmbh Method and device for producing a metallic strip by endless rolling
    US20220002829A1 (en) * 2018-11-14 2022-01-06 Nippon Steel Corporation Apparatus for manufacturing thin steel sheet and method for manufacturing thin steel sheet

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    CN1972764B (en) * 2005-04-07 2011-12-07 乔瓦尼·阿尔韦迪 Process and system for manufacturing metal strips and sheets without solution of continuity between continuous casting and rolling
    CN101107085B (en) * 2006-01-10 2012-11-14 西马克·西马格公司 Method for continuous casting and rolling with an increased casting rate and subsequent hot-rolling of relatively thin metal strands, especially steel strands, and continuous casting and rolling devic
    DE102008020412A1 (en) 2007-08-24 2009-02-26 Sms Demag Ag Method and device for producing a metal strip by casting rolls
    DE102009037278A1 (en) 2009-08-12 2011-02-17 Sms Siemag Ag Apparatus and method for producing a thin hot strip
    WO2011018217A2 (en) 2009-08-12 2011-02-17 Sms Siemag Aktiengesellschaft Device and method for producing a thin hot-rolled strip
    DE102011006357A1 (en) 2010-10-08 2012-04-12 Sms Siemag Ag Rolling mill for producing a metal strip and method for producing a rolling mill
    CN103313812A (en) * 2010-10-12 2013-09-18 西门子Vai金属科技有限责任公司 Energy- and yield-optimized method and plant for producing hot steel strip
    CN103313812B (en) * 2010-10-12 2015-03-25 西门子Vai金属科技有限责任公司 Energy- and yield-optimized method and plant for producing hot steel strip
    DE102012224531A1 (en) 2012-07-27 2014-01-30 Sms Siemag Ag Method for manufacturing hot-rolled strip of casting product e.g. thin slab made of silicon-alloyed steels, involves subjecting casting product to rolling process in hot-rolling roads, before heating casting product

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    DK279290A (en) 1990-11-23
    BG51443A3 (en) 1993-05-14
    AU3686289A (en) 1989-12-12
    FI92161B (en) 1994-06-30
    DK279290D0 (en) 1990-11-23
    IT8820752A0 (en) 1988-05-26
    DE58903052D1 (en) 1993-01-28
    DE3840812A1 (en) 1990-04-05
    KR900701437A (en) 1990-12-03
    FI92161C (en) 1994-10-10
    KR950014488B1 (en) 1995-12-02
    EP0415987A1 (en) 1991-03-13
    TR25630A (en) 1993-05-03
    FI904757A0 (en) 1990-09-27
    AU624831B2 (en) 1992-06-25
    ZA893835B (en) 1990-02-28
    EP0415987B1 (en) 1992-12-16
    IT1224318B (en) 1990-10-04
    DK171539B1 (en) 1996-12-30

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