EP3027330B1 - Continuous casting and rolling installation for producing metal strips - Google Patents

Continuous casting and rolling installation for producing metal strips Download PDF

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Publication number
EP3027330B1
EP3027330B1 EP14744846.8A EP14744846A EP3027330B1 EP 3027330 B1 EP3027330 B1 EP 3027330B1 EP 14744846 A EP14744846 A EP 14744846A EP 3027330 B1 EP3027330 B1 EP 3027330B1
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EP
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Prior art keywords
casting
strip
section
rolling plant
parallel
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German (de)
French (fr)
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EP3027330A1 (en
Inventor
Jörg BAUSCH
Olaf Norman Jepsen
Guido Kleinschmidt
Markus Reifferscheid
Dieter Rosenthal
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SMS Group GmbH
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SMS Group GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/466—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical 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
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • B22D11/1282—Vertical casting and curving the cast stock to the horizontal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/14—Plants for continuous casting
    • B22D11/141—Plants for continuous casting for vertical casting
    • 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

Definitions

  • the plant according to the invention is particularly suitable for steel producers in regions where so far no flat steel production took place and where a specialization to regional requirements should take place.
  • Cast rolling are basically known in the art, such. B. from the EP 2 441 540 A1 , of the DE 196 39 302 A1 , of the WO 2007/039483 , of the DE 41 35 214 A1 and the EP 0 535 368 A1 ,
  • the German patent application DE 41 35 214 A1 discloses a cast roll mill having a vertical exit mold for producing a cast strand and a strand guide for diverting the cast strand from the vertical to the horizontal.
  • the strand guide comprises a vertical part following the mold in the casting direction and a deflecting part adjoining the vertical part.
  • the vertical part in turn comprises a first parallel section following the mold, a reduction section following the parallel section in the casting direction, and a second parallel section following the reduction section in the casting direction, in which the through solidification of the cast strand takes place.
  • Subordinated to the strand guide is a dicing device for dividing the casting strand into metal strips of predetermined length, a tunnel kiln, a Steckel mill for further reduction in thickness of the metal strips, a cooling section and a reel device for winding the rolled metal strip to a collar.
  • the strand guide consists of a plurality of successively connected individual pairs of rollers, these pairs of rollers or the individual roles of the pairs of rollers are each made individually.
  • the EP 0 535 368 A1 discloses a casting and rolling plant for producing metal strips, comprising: a mold with a vertical output for producing a casting strand and at least one strand guide for deflecting the casting strand from the vertical to the horizontal, wherein the strand guide has a mold downstream of the mold in the casting direction and a deflection part.
  • the vertical part has a first parallel section following the mold, a reduction section following the parallel section in the casting direction, and a second parallel section following the reduction section in the casting direction, in which solidification of the cast strand takes place (FIG. 4).
  • a dividing device for dividing the casting strand into metal strips of predetermined length, a tunnel kiln, a Steckel mill, a cooling section and a reel device for winding the rolled metal strip into a collar are connected downstream of the strand guide.
  • the preamble of claim 1 is based on EP 0 535 368 A1 ,
  • the invention has the object of developing a known cast roll mill for the production of metal bands to the effect that they can be made more compact in particular in their height and that they also produce cheaper and easier to use.
  • This object is solved by the subject matter of patent claim 1.
  • the cast roll mill according to the invention is characterized in that the supported length of the casting mill, which extends from the mold level in the mold to the last roll of the vertical part of the strand guide, 2 to 5 m and that the vertical part of the strand guide of a maximum of two, preferably only a single segment is formed with a fixed side and a lot side.
  • the supported length is measured in the casting direction from the casting mirror in the mold to the end of the second parallel part, but not to the end of the vertical part, that is, not to the bending driver. Due to the claimed short supported length, the cast rolling mill also builds in height only briefly compared with other known in the art casting rolling plants.
  • the formation of the vertical part of the strand guide in segmental design with preferably only a single segment with a continuous one-piece fixed side and a multi-part lot side has the advantage that the number of actuators, ie the number of necessary for the roles Anstell is smaller than in a design of the strand guide with a variety of individually controllable roles.
  • the multi-part designed Losseite is therefore required to make the first parallel section, the subsequent reduction section and the second parallel section with their respective roles individually.
  • the diameter of all strand guide rollers is less than 140 mm. This roller size is sufficient, in particular if it is reduced within the reduction section not only with one, but with a plurality of roller pairs.
  • the overall height H2 of the casting rolling mill is less than 7.5 m.
  • the first parallel section has a supported length less than 500 mm and comprises one to three pairs of rollers, which are arranged one behind the other in the casting direction or it is designed in the form of a grid for initially bending-free guidance of the cast strand.
  • the reduction section advantageously comprises three to eight roller pairs, which are arranged one after the other in the casting direction over a length of less than 1.5 m and form a liquid core reduction LCR reduction section.
  • the second parallel section preferably has a length of less than 1.5 m.
  • the two last-mentioned features that is, the number of pairs of rollers in the reduction section and the length of the second parallel section advantageously serve to limit the height of the casting mill.
  • the cast last in the last pair of rollers of the second parallel part of the strand guide is advantageously adjustable to a size of the roll gap of 20 to 40 mm.
  • the narrow sides of the mold lead to a casting thickness ex Kokilles from 40 to 60 mm.
  • FIG. 1 shows the casting and rolling system according to the invention in an overall view.
  • the casting rolling mill 100 as seen in the casting direction R comprises the following components: a casting platform 105, a mold 110, a strand guide 120, a dicing device 130, a tunnel kiln 140, a Steckel mill 160, a cooling section 170 and a coiler 180.
  • an inductive heating 150 may be arranged between the Tunnel furnace and the Steckel rolling mill.
  • the individual components are described in more detail below.
  • Casting platform 105 includes a turret or pan for handling pans.
  • a distributor is used for sequence casting, wherein the cast rolling mill and in particular the strand guide are designed for single-strand operation.
  • the casting operation enables concealed casting with ceramic components between pan and distributor (shadow tube) or between distributor and mold (dip tube).
  • the distributor is typically covered with cover powder while the mold is covered with casting powder.
  • the mold 110 is typically a compact strip production CSP mold. It can consist of four individual side walls, typically two broad sides and two narrow sides, or be formed as a frame mold. In training with narrow sides a narrow-side adjustment is advantageously provided for adjusting the G manformates before and during the casting operation; Preferably, the setting is done online.
  • the mold is equipped with an integrated level measurement, which works, for example, radiometrically or based on an eddy current measurement.
  • the mold can be designed as a funnel mold with a crown of 20 to 60 mm on the upper Kokillenkopf.
  • the output can be formed in parallel or also have a Restbomb réelle of less than 10 mm.
  • the mold plate, d. H. the side walls of the mold are made of copper or a copper alloy with or without full or partial wear-reducing coating.
  • the mold is preferably equipped with an oscillation drive for up to 660 oscillation strokes per minute and for amplitudes of up to +/- 5 mm.
  • the mold is typically water cooled with water levels of 1,000 to 4,000 liters per minute per meter of casting width.
  • the length or height of the hopper mold is 0.9 to 1.3 m.
  • the outlet thickness is 40 to 60 mm.
  • the casting speed is between 2.5 and 7.5 m / min.
  • the strand guide 120 following the mold 110 in the casting direction comprises a vertical part 125 and a deflection part 128 adjoining it in the casting direction R. Both parts will be described below with reference to FIG FIG. 2 described in more detail.
  • the vertical part 125 comprises a first parallel section 125-1 following the mold, a reduction section 125-2 following the parallel section in the casting direction, and a reduction section 125-2 following in the casting direction Casting subsequent second parallel section 125-3, in which the solidification of the cast strand.
  • the first parallel part 125-1 comprises a maximum of three roller pairs, which are arranged below the mold and with respect to the casting direction in alignment with the exit of the mold. Alternatively, it may be formed as a guide grid. Regardless of its training, its length in the casting direction is a maximum of 500 mm.
  • the reduction section 125-2 comprises three to eight roller pairs and extends over a length of less than 1.5 m, preferably less than 1 m.
  • the cast strand is reduced in thickness between 33% and 66% according to the Liquid Core Reduction LCR process.
  • a short strand guide, in particular a short reduction part, with a simultaneously large reduction or thickness decrease in the conically set reduction section 125-2 is typical for the plant concept according to the invention; reduction rates > 13 mm m are adjustable.
  • the reduction section 125-2 is followed in the casting direction by the said second parallel section 125-3 with a length of less than 1.5 m, preferably less than 1.0 m.
  • the second parallel section comprises four to ten pairs of rollers.
  • the second parallel section may also be slightly tapered to accommodate the thermal taper, i. H. shrinkage of the material due to cooling.
  • the vertical strand guide region 125 is preferably formed of only one segment with a fixed side and a loose side.
  • the fixed side, left of the cast strand 210 in FIG. 2 the segment is formed in one piece, while the lot side, right of the casting strand 210 in FIG. 2 , is divided into three parts by way of example.
  • the employment of the pairs of rollers or the frame of the segments is carried out, as usual, via position-controlled hydraulic cylinder with force monitoring. Within the segment area can be dispensed with a roller drive.
  • the strand guide rollers are at least simply divided rollers with diameters of less than 180 mm, preferably in axle roller design with internal cooling.
  • the secondary cooling in the region of the vertical part via single-fluid or two-fluid nozzles with specific Wasserbeetzschlagungsêtn of 0.5 to 4 l / kg of cooling medium, z. B. liters of water per kilogram of steel. Secondary cooling is controlled via spray plans or preferably via a process model.
  • the strand drive comprises at the end of the vertical part 125 a bending driver 190, which is in the form of one or at most two roller pairs, in which both rollers are driven.
  • the distance between the end of the second parallel part 125-3, seen in the casting direction, and the bending driver 190, in particular the axes of rotation of the pair of rollers, is less than 1 m.
  • the strand drive includes a directional driver 195 with up to 4 driven rollers in the directional range, ie at the end of the deflection 128.
  • the bending and straightening are individually controllable pairs of rollers, preferably with position and force monitoring. Bending and guide rollers in the deflecting 128 provide sufficient guidance of the metal strip between the bending driver 190 and the straightening driver 195 at the end of the deflection.
  • the total height H2 of the plant which is measured from the casting level to the strand after its deflection into the horizontal, is between 5 and 7.5 m.
  • said inductive heating 150 is arranged to heat the slab or the metal strip and / or to equalize the temperature of the metal strip over its length.
  • the metal strip is rolled in, for example, three, five or seven passes to a predetermined final thickness. Behind the Steckel mill follow the said cooling section 170 and the reel 180th

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Description

Die Erfindung betrifft eine Gießwalzanlage zum Herstellen von Metallbändern gemäß dem Oberbegriff des Patentanspruchs 1. Konkret betrifft die Erfindung kleine Gießwalzanlagen, sogenannte Micro-Mill-Anlagen zur Herstellung von Flachstahl mit einer Jahresproduktion zwischen 350.000 und 700.000 t Kohlenstoffstahl. Das erfindungsgemäße Anlagenkonzept zeichnet sich durch geringe Investitions- und Produktionskosten, eine schnelle Projektrealisierung mit guter und kurzfristiger Rentabilität des investierten Kapitals und durch ein kompaktes Anlagenlayout aus. Die erfindungsgemäße Anlage eignet sich besonders für Stahlerzeuger in Regionen, wo bisher keine Flachstahlerzeugung stattfand und wo eine Spezialisierung auf regionale Anforderungen erfolgen soll.Specifically, the invention relates to small caster rolling mills, so-called micro-mill plants for the production of flat steel with an annual production between 350,000 and 700,000 t carbon steel. Die Erfindung wird nachfolgend anhand der Zeichnung näher erläutert. The plant concept according to the invention is characterized by low investment and production costs, a fast project realization with good and short-term profitability of the invested capital and a compact plant layout. The plant according to the invention is particularly suitable for steel producers in regions where so far no flat steel production took place and where a specialization to regional requirements should take place.

Gießwalzanlagen sind im Stand der Technik grundsätzlich bekannt, so z. B. aus der EP 2 441 540 A1 , der DE 196 39 302 A1 , der WO 2007/039483 , der DE 41 35 214 A1 und der EP 0 535 368 A1 .Cast rolling are basically known in the art, such. B. from the EP 2 441 540 A1 , of the DE 196 39 302 A1 , of the WO 2007/039483 , of the DE 41 35 214 A1 and the EP 0 535 368 A1 ,

Die deutsche Offenlegungsschrift DE 41 35 214 A1 offenbart eine Gießwalzanlage mit einer Kokille mit vertikalem Ausgang zum Erzeugen eines Gießstrangs und mit einer Strangführung zum Umlenken des Gießstrangs aus der Vertikalen in die Horizontale. Die Strangführung umfasst einen der Kokille in Gießrichtung nachfolgenden Vertikalteil und einen sich an den Vertikalteil anschließenden Umlenkteil. Der Vertikalteil umfasst seinerseits einen der Kokille nachfolgenden ersten Parallelabschnitt, einen dem Parallelabschnitt in Gießrichtung nachfolgenden Reduktionsabschnitt und einen dem Reduktionsabschnitt in Gießrichtung nachfolgenden zweiten Parallelabschnitt, in welchem die Durcherstarrung des Gießstrangs erfolgt. Der Strangführung nachgeordnet ist eine Zerteileinrichtung zum Teilen des Gießstrangs in Metallbänder vorbestimmter Länge, ein Tunnelofen, ein Steckelwalzwerk zum weiteren Dickenreduzieren der Metallbänder, eine Kühlstrecke sowie eine Haspeleinrichtung zum Aufwickeln des gewalzten Metallbandes zu einem Bund. Die Strangführung besteht aus einer Mehrzahl hintereinander geschalteter einzelner Rollenpaare, wobei diese Rollenpaare bzw. die einzelnen Rollen der Rollenpaare jeweils individuell angestellt werden.
Die EP 0 535 368 A1 offenbart eine Gießwalzanlage zum Herstellen von Metallbändern, aufweisend: eine Kokille mit vertikalem Ausgang zum Erzeugen eines Gießstrangs und mindestens eine Strangführung zum Umlenken des Gießstrangs aus der Vertikalen in die Horizontale, wobei die Strangführung einen der Kokille in Gießrichtung nachfolgenden Vertikalteil und einen Umlenkteil aufweist. Der Vertikalteil weist einen der Kokille nachfolgenden ersten Parallelabschnitt, einen dem Parallelabschnitt in Gießrichtung nachfolgenden Reduktionsabschnitt und einen dem Reduktionsabschnitt in Gießrichtung nachfolgenden zweiten Parallelabschnitt, in welchem die Durcherstarrung des Gießstrangs erfolgt, auf (Fig. 4). Eine Zerteileinrichtung zum Zerteilen des Gießstrangs in Metallbänder vorbestimmter Länge, einen Tunnelofen, ein Steckelwalzwerk, eine Kühlstrecke und eine Haspeleinrichtung zum Aufwickeln des gewalzten Metallbandes zu einem Bund sind der Strangführung nachgeschaltet.The German patent application DE 41 35 214 A1 discloses a cast roll mill having a vertical exit mold for producing a cast strand and a strand guide for diverting the cast strand from the vertical to the horizontal. The strand guide comprises a vertical part following the mold in the casting direction and a deflecting part adjoining the vertical part. The vertical part in turn comprises a first parallel section following the mold, a reduction section following the parallel section in the casting direction, and a second parallel section following the reduction section in the casting direction, in which the through solidification of the cast strand takes place. Subordinated to the strand guide is a dicing device for dividing the casting strand into metal strips of predetermined length, a tunnel kiln, a Steckel mill for further reduction in thickness of the metal strips, a cooling section and a reel device for winding the rolled metal strip to a collar. The strand guide consists of a plurality of successively connected individual pairs of rollers, these pairs of rollers or the individual roles of the pairs of rollers are each made individually.
The EP 0 535 368 A1 discloses a casting and rolling plant for producing metal strips, comprising: a mold with a vertical output for producing a casting strand and at least one strand guide for deflecting the casting strand from the vertical to the horizontal, wherein the strand guide has a mold downstream of the mold in the casting direction and a deflection part. The vertical part has a first parallel section following the mold, a reduction section following the parallel section in the casting direction, and a second parallel section following the reduction section in the casting direction, in which solidification of the cast strand takes place (FIG. 4). A dividing device for dividing the casting strand into metal strips of predetermined length, a tunnel kiln, a Steckel mill, a cooling section and a reel device for winding the rolled metal strip into a collar are connected downstream of the strand guide.

Der Oberbegriff von Anspruch 1 basiert auf der EP 0 535 368 A1 . Der Erfindung liegt die Aufgabe zugrunde, eine bekannte Gießwalzanlage zum Herstellen von Metallbändern dahingehend weiterzubilden, dass sie insbesondere in ihrer Höhe kompakter gebaut werden kann und dass sie darüber hinaus preiswerter herzustellen und einfacher zu bedienen ist.
Diese Aufgabe wird durch den Gegenstand des Patentanspruchs 1 gelöst. Demnach ist die erfindungsgemäße Gießwalzanlage dadurch gekennzeichnet, dass die gestützte Länge der Gießwalzanlage, welche sich von dem Gießspiegel in der Kokille bis zur letzten Rolle des Vertikalteils der Strangführung erstreckt, 2 bis 5 m beträgt und dass der Vertikalteil der Strangführung aus maximal zwei, vorzugsweise nur einem einzigen Segment mit einer Festseite und einer Losseite gebildet ist.The preamble of claim 1 is based on EP 0 535 368 A1 , The invention has the object of developing a known cast roll mill for the production of metal bands to the effect that they can be made more compact in particular in their height and that they also produce cheaper and easier to use.
This object is solved by the subject matter of patent claim 1. Accordingly, the cast roll mill according to the invention is characterized in that the supported length of the casting mill, which extends from the mold level in the mold to the last roll of the vertical part of the strand guide, 2 to 5 m and that the vertical part of the strand guide of a maximum of two, preferably only a single segment is formed with a fixed side and a lot side.

Die gestützte Länge bemisst sich in Gießrichtung vom Gießspiegel in der Kokille bis zum Ende des zweiten Parallelteils, nicht jedoch bis zum Ende des Vertikalteils, das heißt, nicht bis zu dem Biegetreiber.
Aufgrund der beanspruchten kurzen gestützten Länge baut die Gießwalzanlage auch in ihrer Höhe nur kurz im Vergleich mit anderen im Stand der Technik bekannten Gießwalzanlagen. Die Ausbildung des Vertikalteils der Strangführung in Segmentbauweise mit vorzugsweise nur einem einzigen Segment mit einer durchgehenden einteiligen Festseite und einer mehrteiligen Losseite bietet den Vorteil, dass die Anzahl der Aktuatoren, d. h. die Anzahl der für die Rollen notwendigen Anstell kleiner ist als bei einer Ausbildung der Strangführung mit einer Vielzahl einzeln ansteuerbarer Rollen. Die mehrteilig gestaltete Losseite ist deshalb erforderlich, um den ersten Parallelabschnitt, den nachfolgenden Reduktionsabschnitt sowie den zweiten Parallelabschnitt mit ihren jeweiligen Rollen individuell anstellen zu können.The supported length is measured in the casting direction from the casting mirror in the mold to the end of the second parallel part, but not to the end of the vertical part, that is, not to the bending driver.
Due to the claimed short supported length, the cast rolling mill also builds in height only briefly compared with other known in the art casting rolling plants. The formation of the vertical part of the strand guide in segmental design with preferably only a single segment with a continuous one-piece fixed side and a multi-part lot side has the advantage that the number of actuators, ie the number of necessary for the roles Anstell is smaller than in a design of the strand guide with a variety of individually controllable roles. The multi-part designed Losseite is therefore required to make the first parallel section, the subsequent reduction section and the second parallel section with their respective roles individually.

Der Durchmesser aller Strangführungsrollen ist kleiner als 140 mm. Diese Rollengröße ist ausreichend, insbesondere wenn innerhalb des Reduktionsabschnitts nicht nur mit einem, sondern mit einer Mehrzahl von Rollenpaaren reduziert wird. Die gesamte Bauhöhe H2 der Gießwalzanlage beträgt weniger als 7,5 m.
Gemäß einem ersten Ausführungsbeispiel hat der erste Parallelabschnitt eine gestützte Länge kleiner als 500 mm und umfasst ein bis drei Rollenpaare, die in Gießrichtung hintereinander angeordnet sind oder ist er in Form eines Gitters ausgebildet zum zunächst biegungsfreien Führen des Gießstrangs.
Der Reduktionsabschnitt umfasst vorteilhafterweise drei bis acht Rollenpaare, welche in Gießrichtung über eine Länge von weniger als 1,5 m hintereinander angeordnet sind und eine Liquid-Core-Reduction LCR-Reduktionsstrecke bilden.
Der zweite Parallelabschnitt weist vorzugsweise eine Länge von weniger als 1,5 m auf.The diameter of all strand guide rollers is less than 140 mm. This roller size is sufficient, in particular if it is reduced within the reduction section not only with one, but with a plurality of roller pairs. The overall height H2 of the casting rolling mill is less than 7.5 m.
According to a first embodiment, the first parallel section has a supported length less than 500 mm and comprises one to three pairs of rollers, which are arranged one behind the other in the casting direction or it is designed in the form of a grid for initially bending-free guidance of the cast strand.
The reduction section advantageously comprises three to eight roller pairs, which are arranged one after the other in the casting direction over a length of less than 1.5 m and form a liquid core reduction LCR reduction section.
The second parallel section preferably has a length of less than 1.5 m.

Die beiden zuletzt angesprochenen Merkmale, das heißt die Anzahl der Rollenpaare in dem Reduktionsabschnitt sowie die Länge des zweiten Parallelabschnitts dienen vorteilhafterweise dazu, die Höhe der Gießwalzanlage zu begrenzen.The two last-mentioned features, that is, the number of pairs of rollers in the reduction section and the length of the second parallel section advantageously serve to limit the height of the casting mill.

Das in Gießrichtung letzte Rollenpaar des zweiten Parallelteils der Strangführung ist vorteilhafterweise auf eine Größe des Walzspaltes von 20 bis 40 mm einstellbar.The cast last in the last pair of rollers of the second parallel part of the strand guide is advantageously adjustable to a size of the roll gap of 20 to 40 mm.

Die Schmalseiten der Kokille führen zu einer Gießdicke ex Kokille von 40 bis 60 mm.The narrow sides of the mold lead to a casting thickness ex Kokilles from 40 to 60 mm.

Der Beschreibung sind 2 Figuren beigefügt, wobei

Figur 1
die erfindungsgemäße Gießwalzanlage; und
Figur 2
eine Detailansicht der Strangführung der erfindungsgemäßen Gießwalzanlage
zeigt.The description is attached to 2 figures, wherein
FIG. 1
the cast roll mill according to the invention; and
FIG. 2
a detailed view of the strand guide of the cast roll mill according to the invention
shows.

Die Erfindung wird nachfolgend unter Bezugnahme auf die genannten Figuren in Form von Ausführungsbeispielen detailliert beschrieben. In allen Figuren sind gleiche technische Elemente mit gleichen Bezugszeichen bezeichnet.The invention will be described in detail below with reference to the said figures in the form of embodiments. In all figures, the same technical elements are designated by the same reference numerals.

Figur 1 zeigt die erfindungsgemäße Gießwalzanlage in einer Gesamtansicht. Demnach umfasst die Gießwalzanlage 100 in Gießrichtung R gesehen die folgenden Komponenten: Eine Gießbühne 105, eine Kokille 110, eine Strangführung 120, eine Zerteileinrichtung 130, einen Tunnelofen 140, ein Steckelwalzwerk 160, eine Kühlstrecke 170 sowie eine Haspeleinrichtung 180. Darüber hinaus kann zwischen dem Tunnelofen und dem Steckelwalzwerk optional noch eine induktive Heizung 150 angeordnet sein. Die einzelnen Komponenten werden nachfolgend genauer beschrieben. FIG. 1 shows the casting and rolling system according to the invention in an overall view. Accordingly, the casting rolling mill 100 as seen in the casting direction R comprises the following components: a casting platform 105, a mold 110, a strand guide 120, a dicing device 130, a tunnel kiln 140, a Steckel mill 160, a cooling section 170 and a coiler 180. In addition, between the Tunnel furnace and the Steckel rolling mill optionally still an inductive heating 150 may be arranged. The individual components are described in more detail below.

Die Gießbühne 105 umfasst einen Drehturm oder einen Pfannenwagen zum Handhaben von Pfannen. Ein Verteiler dient zum Sequenzgießen, wobei die Gießwalzanlage und insbesondere die Strangführung für Einstrang-Betrieb ausgebildet sind. Der Gießbetrieb ermöglicht ein verdecktes Gießen mit keramischen Bauelementen zwischen Pfanne und Verteiler (Schattenrohr) bzw. zwischen Verteiler und Kokille (Tauchrohr). Der Verteiler wird typischerweise mit Abdeckpulver abgedeckt, während die Kokille mit Gießpulver abgedeckt wird.Casting platform 105 includes a turret or pan for handling pans. A distributor is used for sequence casting, wherein the cast rolling mill and in particular the strand guide are designed for single-strand operation. The casting operation enables concealed casting with ceramic components between pan and distributor (shadow tube) or between distributor and mold (dip tube). The distributor is typically covered with cover powder while the mold is covered with casting powder.

Bei der Kokille 110 handelt es sich typischerweise um eine Compact-Strip-Production CSP-Kokille. Sie kann aus vier einzelnen Seitenwänden, typischerweise zwei Breitseiten und zwei Schmalseiten, bestehen oder als Rahmenkokille ausgebildet sein. Bei Ausbildung mit Schmalseiten ist vorteilhafterweise eine Schmalseitenverstelleinrichtung vorgesehen zur Einstellung des Gießformates vor und während des Gießbetriebs; vorzugsweise erfolgt die Einstellung online. Die Kokille ist mit einer integrierten Füllstandsmessung ausgerüstet, welche beispielsweise radiometrisch oder auf Basis einer Wirbelstrommessung arbeitet.The mold 110 is typically a compact strip production CSP mold. It can consist of four individual side walls, typically two broad sides and two narrow sides, or be formed as a frame mold. In training with narrow sides a narrow-side adjustment is advantageously provided for adjusting the Gießformates before and during the casting operation; Preferably, the setting is done online. The mold is equipped with an integrated level measurement, which works, for example, radiometrically or based on an eddy current measurement.

Die Kokille kann als Trichterkokille mit einer Bombierung von 20 bis 60 mm am oberen Kokillenkopf ausgebildet sein. Der Ausgang kann parallel ausgebildet sein oder auch eine Restbombierung von kleiner 10 mm aufweisen. Die Kokillenplatte, d. h. die Seitenwände der Kokille sind aus Kupfer oder einer Kupferlegierung gefertigt mit oder ohne voll- oder teilflächiger verschleißmindernder Beschichtung. Die Kokille ist vorzugsweise mit einem Oszillationsantrieb ausgerüstet für bis zu 660 Oszillationshübe pro Minute und für Amplituden von bis zu +/- 5 mm. Die Kokille ist typischerweise wassergekühlt mit Wassermengen von 1.000 bis 4.000 Litern pro Minute je Meter Gießbreite. Die Länge bzw. Höhe der Trichterkokille beträgt 0,9 bis 1,3 m. Die Auslassdicke beträgt 40 bis 60 mm. Die Gießgeschwindigkeit liegt zwischen 2,5 und 7,5 m/min.The mold can be designed as a funnel mold with a crown of 20 to 60 mm on the upper Kokillenkopf. The output can be formed in parallel or also have a Restbombierung of less than 10 mm. The mold plate, d. H. the side walls of the mold are made of copper or a copper alloy with or without full or partial wear-reducing coating. The mold is preferably equipped with an oscillation drive for up to 660 oscillation strokes per minute and for amplitudes of up to +/- 5 mm. The mold is typically water cooled with water levels of 1,000 to 4,000 liters per minute per meter of casting width. The length or height of the hopper mold is 0.9 to 1.3 m. The outlet thickness is 40 to 60 mm. The casting speed is between 2.5 and 7.5 m / min.

Die der Kokille 110 in Gießrichtung nachfolgende Strangführung 120 umfasst einen Vertikalteil 125 und einen sich daran in Gießrichtung R anschließenden Umlenkteil 128. Beide Teile werden nachfolgend unter Bezugnahme auf Figur 2 näher beschrieben.The strand guide 120 following the mold 110 in the casting direction comprises a vertical part 125 and a deflection part 128 adjoining it in the casting direction R. Both parts will be described below with reference to FIG FIG. 2 described in more detail.

Der Vertikalteil 125 umfasst einen der Kokille nachfolgenden ersten Parallelabschnitt 125-1, einen dem Parallelabschnitt in Gießrichtung nachfolgenden Reduktionsabschnitt 125-2 und einen dem Reduktionsabschnitt in Gießrichtung nachfolgenden zweiten Parallelabschnitt 125-3, in welchem die Durcherstarrung des Gießstrangs erfolgt.The vertical part 125 comprises a first parallel section 125-1 following the mold, a reduction section 125-2 following the parallel section in the casting direction, and a reduction section 125-2 following in the casting direction Casting subsequent second parallel section 125-3, in which the solidification of the cast strand.

Der erste Parallelteil 125-1 umfasst maximal drei Rollenpaare, welche unterhalb der Kokille und bezüglich der Gießrichtung in Flucht zum Ausgang der Kokille angeordnet sind. Alternativ kann er als Führungsgitter ausgebildet sein. Unabhängig von seiner Ausbildung beträgt seine Länge in Gießrichtung maximal 500 mm.The first parallel part 125-1 comprises a maximum of three roller pairs, which are arranged below the mold and with respect to the casting direction in alignment with the exit of the mold. Alternatively, it may be formed as a guide grid. Regardless of its training, its length in the casting direction is a maximum of 500 mm.

Der Reduktionsabschnitt 125-2 umfasst drei bis acht Rollenpaare und erstreckt sich über eine Länge von weniger als 1,5 m, vorzugsweise weniger als 1 m. Innerhalb des Reduktionsabschnittes wird der Gießstrang gemäß dem Liquid-Core-Reduction LCR-Verfahren in seiner Dicke zwischen 33 % und 66 % reduziert. Beispielhaft erfolgt dort eine Dickenreduktion ausgehend von 40 bis 60 mm auf 20 bis 40 mm. Typisch für das erfindungsgemäße Anlagenkonzept ist demnach eine kurze Strangführung, insbesondere ein kurzer Reduktionsteil, bei gleichzeitig großer Reduktion bzw. Dickenabnahme in dem konisch angestellten Reduktionsabschnitt 125-2; Reduktionsraten > 13 mm m

Figure imgb0001
sind einstellbar.The reduction section 125-2 comprises three to eight roller pairs and extends over a length of less than 1.5 m, preferably less than 1 m. Within the reduction section, the cast strand is reduced in thickness between 33% and 66% according to the Liquid Core Reduction LCR process. By way of example, there is a reduction in thickness starting from 40 to 60 mm to 20 to 40 mm. Accordingly, a short strand guide, in particular a short reduction part, with a simultaneously large reduction or thickness decrease in the conically set reduction section 125-2 is typical for the plant concept according to the invention; reduction rates > 13 mm m
Figure imgb0001
 are adjustable.

An den Reduktionsabschnitt 125-2 schließt sich in Gießrichtung der besagte zweite Parallelabschnitt 125-3 an mit einer Länge von weniger als 1,5 m, vorzugsweise weniger als 1,0 m. Der zweite Parallelabschnitt umfasst vier bis zehn Rollenpaare. In der Praxis kann der zweite Parallelabschnitt auch leicht konisch angestellt sein, um dem thermischen Taper, d. h. dem Schrumpf des Materials aufgrund der Abkühlung, Rechnung zu tragen.The reduction section 125-2 is followed in the casting direction by the said second parallel section 125-3 with a length of less than 1.5 m, preferably less than 1.0 m. The second parallel section comprises four to ten pairs of rollers. In practice, the second parallel section may also be slightly tapered to accommodate the thermal taper, i. H. shrinkage of the material due to cooling.

Der vertikale Strangführungsbereich 125 ist vorzugsweise aus nur einem Segment mit einer Festseite und einer Losseite gebildet. Die Festseite, links vom Gießstrang 210 in Figur 2, des Segmentes ist einteilig ausgebildet, während die Losseite, rechts vom Gießstrang 210 in Figur 2, beispielhaft dreigeteilt ist. Dies bedeutet, es sind individuell anstellbare Segmentrahmen vorgesehen für den ersten Parallelteil 125-1, für den Reduktionsabschnitt 125-2 und für den zweiten Parallelabschnitt 125-3. Die Anstellung der Rollenpaare bzw. der Rahmen der Segmente erfolgt, wie üblich, über positionsgeregelte Hydraulikzylinder mit Kraftüberwachung. Innerhalb des Segmentbereiches kann auf einen Rollenantrieb verzichtet werden. Bei den Strangführungsrollen handelt es sich um mindestens einfach geteilte Rollen mit Durchmessern von weniger als 180 mm, vorzugsweise in Achsrollenausführung mit Innenkühlung. Die Sekundärkühlung im Bereich des Vertikalteils erfolgt über Einstoff- oder Zweistoffdüsen mit spezifischen Wasserbeaufschlagungsdichten von 0,5 bis 4 l/kg Kühlmedium, z. B. Liter Wasser pro Kilogramm Stahl. Die Regelung der Sekundärkühlung erfolgt über Spritzpläne oder bevorzugt über ein Prozessmodell.The vertical strand guide region 125 is preferably formed of only one segment with a fixed side and a loose side. The fixed side, left of the cast strand 210 in FIG. 2 , the segment is formed in one piece, while the lot side, right of the casting strand 210 in FIG. 2 , is divided into three parts by way of example. This means there are individually engageable segment frame provided for the first parallel part 125-1, for the reduction section 125-2 and for the second parallel section 125-3. The employment of the pairs of rollers or the frame of the segments is carried out, as usual, via position-controlled hydraulic cylinder with force monitoring. Within the segment area can be dispensed with a roller drive. The strand guide rollers are at least simply divided rollers with diameters of less than 180 mm, preferably in axle roller design with internal cooling. The secondary cooling in the region of the vertical part via single-fluid or two-fluid nozzles with specific Wasserbeaufschlagungsdichten of 0.5 to 4 l / kg of cooling medium, z. B. liters of water per kilogram of steel. Secondary cooling is controlled via spray plans or preferably via a process model.

Wie in Figur 2 dargestellt, umfasst der Strangantrieb am Ende des Vertikalteils 125 einen Biegetreiber 190, welcher in Form von ein oder maximal zwei Rollenpaaren ausgebildet ist, bei denen jeweils beide Rollen angetrieben sind. Der Abstand zwischen dem Ende des zweiten Parallelteils 125-3, in Gießrichtung gesehen, und dem Biegetreiber 190, insbesondere den Drehachsen von dessen Rollenpaar, beträgt weniger als 1 m. Darüber hinaus umfasst der Strangantrieb einen Richttreiber 195 mit bis zu 4 angetriebene Rollen im Richtbereich, d. h. am Ende des Umlenkbereiches 128. Bei dem Biege- und Richttreiber handelt es sich um einzeln ansteuerbare Rollenpaare, bevorzugt mit Positions- und Kraftüberwachung. Biege- und Führungsrollen im Umlenkteil 128 sorgen für eine ausreichende Führung des Metallbandes zwischen dem Biegetreiber 190 und dem Richttreiber 195 am Ende des Umlenkteils.As in FIG. 2 illustrated, the strand drive comprises at the end of the vertical part 125 a bending driver 190, which is in the form of one or at most two roller pairs, in which both rollers are driven. The distance between the end of the second parallel part 125-3, seen in the casting direction, and the bending driver 190, in particular the axes of rotation of the pair of rollers, is less than 1 m. In addition, the strand drive includes a directional driver 195 with up to 4 driven rollers in the directional range, ie at the end of the deflection 128. The bending and straightening are individually controllable pairs of rollers, preferably with position and force monitoring. Bending and guide rollers in the deflecting 128 provide sufficient guidance of the metal strip between the bending driver 190 and the straightening driver 195 at the end of the deflection.

Die gesamte Bauhöhe H2 der Anlage, die sich vom Gießspiegel bis zum Strang nach dessen Umlenkung in die Horizontale bemisst, liegt zwischen 5 und 7,5 m.The total height H2 of the plant, which is measured from the casting level to the strand after its deflection into the horizontal, is between 5 and 7.5 m.

Wie gesagt, schließt sich nach dem Umlenkteil 128 eine Zerteileinrichtung 130 und ein Tunnelofen an, zur Entkopplung des bis dahin stattgefundenen Gießprozesses von dem nachfolgend stattfindenden Walzprozess. Optional ist hinter dem Tunnelofen 140 die besagte induktive Heizung 150 angeordnet, um die Bramme bzw. das Metallband aufzuheizen und/oder die Temperatur des Metallbandes über seiner Länge zu vergleichmäßigen.As I said, after the deflection part 128 is followed by a dicing device 130 and a tunnel kiln, for the decoupling of the hitherto taken place Casting process from the subsequent rolling process. Optionally, behind the tunnel kiln 140, said inductive heating 150 is arranged to heat the slab or the metal strip and / or to equalize the temperature of the metal strip over its length.

In dem Steckelwalzwerk 160 mit zwei Wickelöfen 162, 164 wird das Metallband in beispielsweise drei, fünf oder sieben Stichen auf eine vorgegebene Enddicke gewalzt. Hinter dem Steckelwalzwerk folgen die besagte Kühlstrecke 170 und der Haspel 180.In the Steckel mill 160 with two coiler ovens 162, 164, the metal strip is rolled in, for example, three, five or seven passes to a predetermined final thickness. Behind the Steckel mill follow the said cooling section 170 and the reel 180th

BezugszeichenlisteLIST OF REFERENCE NUMBERS

100100
Gießwalzanlagecontinuous casting and rolling
105105
Gießbühnecasting platform
110110
Kokillemold
120120
Strangführungstrand guide
123123
Rollenpaarroller pair
125125
Vertikalteilvertical part
125-1125-1
erster Parallelabschnittfirst parallel section
125-2125-2
Reduktionsabschnittreduction section
125-3125-3
zweiter Parallelabschnittsecond parallel section
128128
Umlenkteildeflecting
130130
ZerteileinrichtungZerteileinrichtung
140140
Tunnelofentunnel kiln
150150
induktive Heizunginductive heating
160160
SteckelwalzwerkSteckel mill
162162
Wickelofen (Steckel)Winding furnace (Steckel)
164164
Wickelofen (Steckel)Winding furnace (Steckel)
170170
Kühlstreckecooling section
180180
Haspeleinrichtungcoiler
190190
Biegetreiberbending driver
195195
Richttreiberstraightening
210210
Gießstrangcast strand
220220
Metallbändermetal bands
250250
BundFederation
RR
Gießrichtungcasting
H1H1
gestützte Länge/Höhesupported length / height
H2H2
Bauhöheheight
DD
Durchmesserdiameter

Claims (6)

  1. Casting-and-rolling plant (100) for producing metal strips (220), comprising:
    a mould (110) with a vertical outlet for producing a cast strip (210),
    at least one strip guide (12) for deflecting the cast strip from the vertical to the horizontal,
    wherein the strip guide (120) has a vertical part (125), which follows the mould in casting direction (R), and a deflecting part (128), wherein the vertical part has a first parallel section (125-1) following the mould, a reduction section (125-2) following the parallel section in casting direction and a second parallel section (125-3), which follows the reduction section in casting direction and in which hardening-through of the cast strip takes place;
    a dividing-up device (130) for dividing up the cast strip (210) into metal strips (220) of predetermined length;
    a tunnel furnace (140);
    a Steckel rolling mill (160);
    a cooling path (170); and
    a coiler (180) for coiling the rolled metal strip (220) to form a coil (250);
    characterised in that
    the supported length (H1) of the casting-and-rolling plant (100), which extends from the casting surface in the mould to the last roller of the second parallel part (135-3) of the strip guide (120), is 2 to 5 metres;
    the vertical part (125) of the strip guide is formed from at most two segments with a fixed side and a movable side;
    the diameter (D) of all strip guide rollers (122) in the strip guide is less than 140 millimetres; and
    the overall constructional height (H2) of the casting-and-rolling plant (100) is less than 7.5 metres.
  2. Casting-and-rolling plant (100) according to claim 1, characterised in that the first parallel section (125-1) is smaller than 500 millimetres and comprises one to three roller pairs, which are arranged in succession in casting direction, or a grating for initial bending-free guidance of the cast strip (210).
  3. Casting-and-rolling plant (100) according to one of the preceding claims, characterised in that the reduction section (125-2) comprises three to eight roller pairs, which are arranged in succession in casting direction over a length of less than 1.5 metres and form a liquid core reduction (LCR) path.
  4. Casting-and-rolling plant (100) according to any one of the preceding claims, characterised in that the second parallel section (125-3) has a length of less than 1.5 metres.
  5. Casting-and-rolling plant (100) according to any one of the preceding claims, characterised in that the gap of at least the roller pair (123), which is last in casting direction, of the second parallel part (125-3) of the strip guide is settable to a casting thickness for the cast strip of 20 to 40 millimetres.
  6. Casting-and-rolling plant (100) according to any one of the preceding claims, characterised in that the narrow sides of the mould (110) form a casting thickness of the cast strip of 40 to 60 millimetres.
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DE102015210863A1 (en) 2015-04-15 2016-10-20 Sms Group Gmbh Casting-rolling plant and method for its operation
DE102018207137A1 (en) * 2018-05-08 2019-11-14 Sms Group Gmbh Casting-rolling plant, and method for its operation
IT201800006563A1 (en) * 2018-06-21 2019-12-21 PLANT AND PROCEDURE FOR THE PRODUCTION OF A HOT ROLLED METAL TAPE
CN110653259A (en) * 2018-06-29 2020-01-07 宝山钢铁股份有限公司 Continuous production device and method for metal composite plate strip

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US5803155A (en) * 1995-05-18 1998-09-08 Danieli & C. Officine Meccaniche Spa Casting line for slabs
US5743125A (en) 1995-09-06 1998-04-28 Sms Schloemann-Siemag Aktiengesellschaft Hot strip production plant for rolling thin rolled strip
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WO2015014865A1 (en) 2015-02-05
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DE102013214939A1 (en) 2015-02-05
CN105492132A (en) 2016-04-13

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