[go: up one dir, main page]

EP0787808A1 - Method and device for in-line-pickling of hot rolled strip in sequence with thin slab production - Google Patents

Method and device for in-line-pickling of hot rolled strip in sequence with thin slab production Download PDF

Info

Publication number
EP0787808A1
EP0787808A1 EP97250023A EP97250023A EP0787808A1 EP 0787808 A1 EP0787808 A1 EP 0787808A1 EP 97250023 A EP97250023 A EP 97250023A EP 97250023 A EP97250023 A EP 97250023A EP 0787808 A1 EP0787808 A1 EP 0787808A1
Authority
EP
European Patent Office
Prior art keywords
strip
pickling
plant
thin slab
tape
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP97250023A
Other languages
German (de)
French (fr)
Other versions
EP0787808B1 (en
Inventor
Dieter Dipl.-Ing. Figge
Helmut Humbs
Michael Dipl.-Ing. Haentjes
Rainer Dipl.-Ing. Lorzen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Siemag AG
Original Assignee
Mannesmann AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of EP0787808A1 publication Critical patent/EP0787808A1/en
Application granted granted Critical
Publication of EP0787808B1 publication Critical patent/EP0787808B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G3/00—Apparatus for cleaning or pickling metallic material
    • C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling
    • 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
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/22—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories for rolling metal immediately subsequent to continuous casting, i.e. in-line rolling of steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0085—Joining ends of material to continuous strip, bar or sheet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0007—Cutting or shearing the product
    • B21B2015/0021—Cutting or shearing the product in the rolling direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B2015/0057—Coiling the rolled product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
    • B21B39/08—Braking or tensioning arrangements
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0278—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular surface treatment
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling

Definitions

  • the invention relates to a working method and a plant for pickling a strip produced in a thin slab plant and subsequently hot-rolled, in particular low-carbon steel strip, in a continuous process immediately following the rolling process.
  • the main problem with the creation of a system according to the task and with the implementation of the working process thereon is the adaptation of the pickling time to the speeds given by the hot strip production; because the stain must be able to use different strip thicknesses and Process speeds in an optimized way.
  • Pickling plants advantageously work with a strip that is approx. 90 ° C cold.
  • a working process for pickling a strip produced in a thin slab plant and subsequently hot-rolled is useful if large batch sizes can be processed, in particular low-carbon steels are suitable for carrying out the process.
  • the working method is characterized by the method steps specified in claim 1.
  • a low-carbon steel strip can be pickled inline, whereby the speeds given by the thin slab caster and the subsequent hot strip mill are suitable, with appropriate coordination, to master the temperature control in preparation for the pickling process as well as the pickling process for the common rolling stock thicknesses and widths.
  • the process can be carried out inline, i.e. that an endless pickling is carried out following an endless rolling of the thin slab material.
  • the abrupt cooling of the strip from 480 ° C to 95 ° C also eliminates the risk of martensite formation because the transformation is complete at 480 ° C, but this cooling helps to form a readily detachable scale.
  • the thus prepared, less than 100 ° C cold strip is passed through a number of pickling containers, the number of which depends on the width and thickness of the strip to be treated, whereby individual containers may be emptied via appropriate pump systems or filled with acid.
  • the working method is designed in such a way that a previously for introducing the tape into the treatment system threaded pilot tape is connected at the end to the beginning of the tape, that the pilot tape is wound on one of two reel mandrels after passing through the treatment system and is separated from the tape after the winding process has ended, and that the tape separated from the pilot tape is wound on the second reel mandrel.
  • the stain threading process is rarely required, for example only twice a year.
  • the pilot strip then guides the beginning of the hot strip through the pickling line and is itself wound onto the one mandrel of a reel. As soon as the hot strip is drawn through the pickling line and the subsequent system parts, the connection point between the pilot strip and the hot strip is separated and the hot strip is wound onto the second mandrel.
  • the pilot tape is removed from the first mandrel and reused at the next start.
  • a pickling plant for performing the working method according to the invention is claimed in claim 6
  • the inline arrangement of the plant parts mentioned there has the significant advantage that double plant parts can be avoided.
  • the system according to the invention has only one winding station with two winding mandrels, while individual systems these plant parts would need double.
  • the system can thus be operated in a very compact and functional manner, so that large batch sizes of a certain material can be optimally treated economically.
  • a loop storage device and a stapling device for joining the pilot strip to the strip to be pickled are preferably provided within the pickling system between the cooling devices, each with a subsequent compensation section and the pickling device.
  • the proposal deliberately dispenses with a welding device with expensive tape storage required, instead a fast-working stitching device is proposed which only requires a short loop storage device.
  • a device for applying the tensile stresses to the belt is provided in front of and behind the pickling device.
  • each of these devices is designed as a circulating chain frame with which the necessary transport and tensile forces can be easily applied.
  • the strip widths within the intended pickling line remain essentially constant; strips with a width of 1300 mm are assumed.
  • the strip width can be changed in the range + 100 mm / - 100 mm via a trimming device for the longitudinal edges of the pickled strip provided behind the pickling device.
  • the winding mandrels are arranged on a carousel reel with a turning mandrel and an empty space.
  • the hot strip begins, the pilot strip is wound onto the mandrel 1 of the turning reel by the pickle, the reel is turned.
  • the connection point between the pilot strip and the hot strip is separated and the hot strip is wound onto the second mandrel of the turning reel.
  • Known turbolence pickling tanks into which treatment acid is injected, are preferably provided as pickling tanks in the pickling system.
  • the containers are passed through by the belt in a horizontal direction, they are over in no time Filling or emptying pump systems, the temperature of the acid in the pickling tanks also being controllable to adapt to different pickling tasks.
  • the pickling plant can be realized particularly advantageously if, according to a preferred feature of the invention, the process parts of the pickling plant are arranged one above the other in at least three levels, in which the strip which is deflected twice by 180 ° is guided.
  • the system is built very compactly, with a correspondingly large spacing of the individual floors from one another of, for example, 4 meters, the belt only has tensions in the elastic range.
  • the present invention solves the task of coupling a thin slab caster, a hot strip mill and a pickle for the production of thin hot strip in a surprisingly simple manner.
  • the system is particularly suitable for processing low-carbon steels (e.g. ST 37, ST 52 and ST10), which can be economically produced in large batch sizes.
  • the system is compact and simple to build and is also inexpensive to manufacture because, due to the inline process, essential system parts are only required once. The handling of the system is simple and safe, so that a good cost-performance ratio can be expected.
  • 1 denotes the last stand of a hot strip rolling mill, which, immediately behind a thin slab caster, rolls the thin slab into a strip with final dimensions in the range between 2.5 mm and 1 mm.
  • a cooling device 3 is provided after the hot strip rolling mill, in which the strip is mildly cooled from approx. 850 ° C. to 680 ° C.
  • a 38 m long compensation section is provided, which with 5 is indicated and in which the strip maintains a temperature of 680 ° C over the entire strip cross-section by balancing the outside and inside temperature.
  • the stapler 12 is preceded by a pair of scissors 14 in which the beginning of the tape can be straightened.
  • the tape B leaves the stapling device, the mode of operation of which will be described later, and is deflected at 16 by 180 ° on a second floor in the previous direction of tape travel in the opposite direction.
  • the strip arrives in a third cooling section, where it is cooled very abruptly from 480 ° C. to approx. 95 ° C.
  • the cooling section is designated 18. Again supported by driver 19, the cooled strip reaches an approximately 25 m long third compensation section 30, in which the temperature of approximately 95 ° C. is evened out over the entire strip cross section.
  • the belt is again deflected by 180 ° in its direction of travel and reaches the pickling plant, which is designated by a total of 22, driven by a circulating chain frame, which is designated by 21.
  • the pickling line is composed of a total of 5 pickling tanks, each 18 m long, which are designed as turbulence pickling with a horizontal pass for the belt.
  • the pickling tanks are designated 23 a to 23 e.
  • the containers can be filled or emptied with acid using pump systems (not shown).
  • the known rinsing of the strip in the rinsing devices 24 follows, followed by drying in the drying device 25 and possibly trimming of the strip edges in the trimming shear 26.
  • a second circulating chain stand 27 is arranged on the output side of the pickling system, in which the necessary strip tension is between this and the first circulating chain frame 21 can be applied.
  • the system ends with a drum shear 28 and the turning reel 29, in which the finished tape or the pilot tape can be wound.
  • the tape is threaded into the stain with the aid of a pilot tape which is wound at 13 and extends in the system and which is connected in the stitching device 12 to the beginning of the tape.
  • the pilot tape is pulled together with the attached tape through the overall system, including the pickling device 22, and is wound onto the first coiler mandrel of the reversible reel 29 at the end of the system.
  • the beginning of the band reaches the area of the reversible reel, it is separated from the pilot band and directed onto the second reel mandrel of the reversible reel 29.
  • the pilot strip can be unwound and returned to the next threading process, while the hot strip is wound up in a known manner on the reversing reel.
  • a good flexible metal fabric tape is expediently used as the pilot tape, which does not require any great forces when being guided through the 180 ° detours.
  • the entire system is 178 m long between the last stand of the hot strip mill and the turning reel.
  • This compact design can be achieved by arranging the entire system on three floors, each 4 m apart.
  • the first cooling section with a length of 10 m enables cooling at the speeds specified in claim 2, the compensation section 1 with a length of 38 m leads to the temperatures indicated.
  • the second cooling section with a length of 15 m is followed by the second exit section, for which a length of 38 m is also provided. 18 m are provided for the pickling tanks, which have proven to be sufficient to pickle even the thickest strip to be produced in the system.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Metal Rolling (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

In-line pickling process for hot strip, especially low carbon steel, directly behind a thin slab casting and rolling line, with the following process stages: (a) mild cooling of the strip leaving the rolling line at ≥ 880 degrees C to 480 degrees C in two successive cooling sections, each with following recovery sections for temperature equalisation of edges and core; (b) sharp cooling from 480 degrees C to ca. 95 degrees C in a third cooling section, followed by a third recovery section for temperature equalisation at ca. 100 degrees C; (c) passing the strip through a number of chemical pickling tanks according to strip thickness and/or speed at corresponding pickling temperatures; and (d) rinsing, drying and coiling of the pickled strip. Appropriate process equipment is also claimed.

Description

Die Erfindung betrifft eine Arbeitsverfahren und eine Anlage zum Beizen eines in einer Dünnbrammenanlage erzeugten und im Anschluß daran warmgewalzten Bandes, insbesondere kohlenstoffarmen Stahlbandes, in einem unmittelbar an den Walzvorgang anschließenden kontinuierlichen Prozeß.The invention relates to a working method and a plant for pickling a strip produced in a thin slab plant and subsequently hot-rolled, in particular low-carbon steel strip, in a continuous process immediately following the rolling process.

Für bestimmte Einzweck-Produkte in großen Losgrößen ist eine Kopplung zwischen einer Dünnbrammengießanlage, einem Warmbandwalzwerk und einer Beize sinnvoll. Bis heute sind solche Kopplungen nicht bekannt. Der Überlegung zur Schaffung einer solchen Anlage und des zugehörigen Verfahrens liegt die Tatsache zugrunde, daß dünnes Warmband billiger erzeugt werden kann als Kaltband. Bei der Substitution von Kaltband durch Warmband kommt aber nur gebeiztes Warmband in Frage, damit auf das fertige Band Oberflächenschutz und Beschichtung problemlos aufgebracht werden können. Für eine sinnvolle Verbindung von Gießanlage, Warmbandwalzwerk und Beize ist vorauszusetzen, daß die Gesamtanlage Inline arbeiten muß, so daß unter Berücksichtigung des Gieß- und Walzprozeßes eine Abstimmung aller Geschwindigkeiten vorgenommen werden muß. Doppelte Anlagenteile sollen möglichst vermieden werden, damit die Anlage kostengünstig erstellt werden kann und produktiv arbeitet.For certain single-purpose products in large batch sizes, it makes sense to couple between a thin slab caster, a hot strip mill and a pickle. To date, such couplings are not known. The reason for creating such a system and the associated method is based on the fact that thin hot strip can be produced cheaper than cold strip. When cold strip is replaced by hot strip, only pickled hot strip is suitable, so that surface protection and coating can be applied to the finished strip without any problems. For a sensible connection of the casting plant, hot strip rolling mill and pickling line, it must be assumed that the entire plant must work inline, so that all speeds must be coordinated taking the casting and rolling process into account. Duplicate parts of the plant should be avoided as far as possible so that the plant can be constructed cost-effectively and works productively.

Das Hauptproblem bei der Schaffung einer aufgabengemäßen Anlage und bei der Durchführung des darauf betriebenen Arbeitsverfahrens ist die Anpassung der Beizdauer an die durch die Warmbandproduktion vorgegebenen Geschwindigkeiten; denn die Beize muß in der Lage sein, unterschiedliche Bandstärken und Geschwindigkeiten in optimierter Weise zu verarbeiten. Beizanlagen arbeiten günstigerweise mit ca. 90°C kaltem Band.The main problem with the creation of a system according to the task and with the implementation of the working process thereon is the adaptation of the pickling time to the speeds given by the hot strip production; because the stain must be able to use different strip thicknesses and Process speeds in an optimized way. Pickling plants advantageously work with a strip that is approx. 90 ° C cold.

Ein Arbeitsverfahren zum Beizen eines in einer Dünnbrammenanlage erzeugten und im Anschluß daran warmgewalzten Bandes ist dann sinnvoll, wenn große Losgrößen verarbeitet werden können, insbesondere kohlenstoffarme Stähle eignen sich zur Durchführung des Verfahrens.A working process for pickling a strip produced in a thin slab plant and subsequently hot-rolled is useful if large batch sizes can be processed, in particular low-carbon steels are suitable for carrying out the process.

Erfindungsgemäß ist das Arbeitsverfahren gekennzeichnet durch die im Patentanspruch 1 angegebenen Verfahrensschritte. Mit diesen aufeinanderfolgenden Verfahrensschritten läßt sich ein kohlenstoffarmes Stahlband inline beizen, wobei die durch die Dünnbrammengießanlage und das anschließende Warmbandwalzwerk vorgegebenen Geschwindigkeiten bei entsprechender Abstimmung geeignet sind, die Temperaturführung zur Vorbereitung des Beizprozeßes ebenso zu beherrschen, wie den Beizvorgang für die gängigen Walzgutdicken und -breiten. Das Verfahren läßt sich inline durchführen, d.h. daß im Anschluß an eine endlose Walzung des Dünnbrammenvormaterials ein endloses Beizen durchgeführt wird. Durch das Kühlen des Bandes in mehreren Kühlstrecken und dazwischengeschaltetes Erholen läßt sich bei den angegebenen Vefahrensstufen eine Martensit-Bildung im Band sicher vermeiden. Die schroffe Abkühlung des Bandes von 480°C auf 95°C schließt ebenfalls die Gefahr der Bildung von von Martensit aus, weil die Umwandlung bei 480°C beendet ist, doch ist diese Abkühlung zur Bildung eines gut lösbaren Zunders hilfreich. Das so vorbereitete, weniger als 100°C kalte Band wird durch eine Anzahl von Beizbehältern geführt, deren Anzahl abhängig ist von der Breite und Dicke des jeweils zu behandelnden Bandes, wobei gegebenenfalls einzelne Behälter über entsprechende Pumpsysteme entleert oder mit Säure gefüllt sind.According to the invention, the working method is characterized by the method steps specified in claim 1. With these successive process steps, a low-carbon steel strip can be pickled inline, whereby the speeds given by the thin slab caster and the subsequent hot strip mill are suitable, with appropriate coordination, to master the temperature control in preparation for the pickling process as well as the pickling process for the common rolling stock thicknesses and widths. The process can be carried out inline, i.e. that an endless pickling is carried out following an endless rolling of the thin slab material. By cooling the strip in several cooling sections and intervening recovery, the formation of martensite in the strip can be avoided at the specified process stages. The abrupt cooling of the strip from 480 ° C to 95 ° C also eliminates the risk of martensite formation because the transformation is complete at 480 ° C, but this cooling helps to form a readily detachable scale. The thus prepared, less than 100 ° C cold strip is passed through a number of pickling containers, the number of which depends on the width and thickness of the strip to be treated, whereby individual containers may be emptied via appropriate pump systems or filled with acid.

Es hat sich herausgestellt, daß ein mit konstant 1300 mm Breite das Walzwerk verlassendes Band mit bestimmten Durchlaufgeschwindigkeiten behandelt werden muß, die abhängig sind von der Dicke und Breite des jeweils in der Anlage eingefädelten Bandes. Entsprechende Verhältnisse zwischen Banddicke und Durchlaufgeschwindigkeit sind im Patentanspruch 2 angegeben.It has been found that a strip leaving the rolling mill with a constant 1300 mm width has to be treated at certain throughput speeds, which are dependent on the thickness and width of the strip that is threaded into the system. Corresponding relationships between strip thickness and throughput speed are specified in claim 2.

Nach einem anderem Merkmal der Erfindung wird das Arbeitsverfahren dadurch ausgestaltet, daß zum Einführen des Bandes in die Behandlungsanlage ein zuvor eingefädeltes Pilotband endseitig mit dem Bandanfang verbunden wird, daß das Pilotband nach dem Durchlauf durch die Behandlungsanlage auf einem von zwei Haspeldornen aufgewickelt und nach Beendigung des Wickelvorganges vom Band getrennt wird und daß das vom Pilotband getrennte Band auf dem zweiten Haspeldorn aufgewickelt wird.According to another feature of the invention, the working method is designed in such a way that a previously for introducing the tape into the treatment system threaded pilot tape is connected at the end to the beginning of the tape, that the pilot tape is wound on one of two reel mandrels after passing through the treatment system and is separated from the tape after the winding process has ended, and that the tape separated from the pilot tape is wound on the second reel mandrel.

Der Einfädelprozeß für die Beize ist nur selten erforderlich, beispielsweise nur zweimal im Jahr. Dann führt das Pilotband den Warmbandanfang durch die Beize und wird selbst auf den einen Dorn eines Haspels aufgewickelt. Sobald das Warmband durch die Beize und die nachfolgenden Anlagenteile gezogen ist, wird die Verbindungsstelle zwischen Pilotband und Warmband getrennt und das Warmband auf den zweiten Dorn gewickelt.The stain threading process is rarely required, for example only twice a year. The pilot strip then guides the beginning of the hot strip through the pickling line and is itself wound onto the one mandrel of a reel. As soon as the hot strip is drawn through the pickling line and the subsequent system parts, the connection point between the pilot strip and the hot strip is separated and the hot strip is wound onto the second mandrel.

Das Pilotband wird nach einem anderem Merkmal der Erfindung vom ersten Dorn entfernt und beim nächsten Start wiederverwendet.According to another feature of the invention, the pilot tape is removed from the first mandrel and reused at the next start.

Nach jeder Produktionsperiode von ca. 4 Stunden ist ein Aufarbeiten der Arbeitswalzen in der Warmbandstraße erforderlich. Auch müssen die Tauchrohre in der Dünnbrammengießanlage erneuert werden, wozu erfahrungsgemäß eine Pause von ca. 30 Minuten erforderlich ist. In einer Weiterbildung des erfindungsgemäßen Arbeitsverfahrens ist deshalb vorgesehen, daß beim Zustellen von Anlageteilen, beim Walzenwechsel, beim Austausch von Gießrohren in der Gießanlage oder zur Reperaturzwecken das angehaltene Band in der Behandlungsanlage verbleibt und als "Pilotband" für die nächste Beizkampagne verwendet wird.
Auf diese Weise wird ein neues Einfädeln des Bandes mittels eines separaten Pilotbandes über einen sehr langen Zeitraum überflüssig. In einer Produktionsperiode von ca. 4 Stunden wird nur die Banddicke geändert, die Übergangsstücke werden herausgeschnitten.After each production period of approx. 4 hours, the work rolls have to be worked up in the hot strip mill. The immersion pipes in the thin slab caster also have to be replaced, which, based on experience, requires a break of approx. 30 minutes. In a further development of the working method according to the invention, it is therefore provided that when the system parts are delivered, when the rollers are changed, when the pouring tubes are replaced in the casting system or for repair purposes, the belt that is stopped remains in the treatment system and is used as a "pilot belt" for the next pickling campaign.
In this way, a new threading of the tape using a separate pilot tape over a very long period of time is superfluous. In a production period of approx. 4 hours, only the strip thickness is changed, the transition pieces are cut out.

Eine Beizanlage zur Durchführung des erfindungsgemäßen Arbeitsverfahrens ist im Patentanspruch 6 beanspruchtA pickling plant for performing the working method according to the invention is claimed in claim 6

Die Inlineanordnung der dort genannten Anlagenteile beinhaltet den bedeutsamen Vorteil, daß doppelte Anlagenteile vermeidbar sind. So hat die erfindungsgemäße Anlage nur eine Aufwickelstation mit zwei Aufwickeldornen, während Einzelanlagen diese Anlagenteile doppel benötigen würden. Die Anlage läßt sich somit sehr kompakt und funktionell betreiben, so daß große Losgrößen eines bestimmten Werkstoffes wirtschaftlich optimal behandelt werden können.The inline arrangement of the plant parts mentioned there has the significant advantage that double plant parts can be avoided. Thus, the system according to the invention has only one winding station with two winding mandrels, while individual systems these plant parts would need double. The system can thus be operated in a very compact and functional manner, so that large batch sizes of a certain material can be optimally treated economically.

Vorzugsweise ist innerhalb der Beizanlage zwischen den Kühleinrichtungen mit jeweils anschließender Ausgleichstrecke und der Beizeinrichtung ein Schlingenspeicher und eine Hefteinrichtung zum Zusammenfügen des Pilotbandes mit dem zu beizendem Band vorgesehen. Der Vorschlag verzichtet bewußt auf eine Schweißvorrichtung mit teurem erforderlichen Bandspeicher, statt dessen wird eine schnell arbeitende Heftvorrichtung vorgeschlagen, die nur einen kurzen Schlingenspeicher benötigt.A loop storage device and a stapling device for joining the pilot strip to the strip to be pickled are preferably provided within the pickling system between the cooling devices, each with a subsequent compensation section and the pickling device. The proposal deliberately dispenses with a welding device with expensive tape storage required, instead a fast-working stitching device is proposed which only requires a short loop storage device.

Um die in der Anlage erforderlichen Zug- und Transportkräfte kostengünstig aufbringen zu können, wird jeweils vor und hinter der Beizeinrichtung eine Einrichtung zum Aufbringen der Zugspannungen auf das Band vorgesehen. Jede dieser Einrichtung ist in einer günstigen Ausgestaltung der Erfindung als Umlaufkettengerüst ausgeführt, mit dem die erforderlichen Transport- und Zugkräfte einfach aufbringbar sind.In order to be able to apply the tensile and transport forces required in the system at low cost, a device for applying the tensile stresses to the belt is provided in front of and behind the pickling device. In a favorable embodiment of the invention, each of these devices is designed as a circulating chain frame with which the necessary transport and tensile forces can be easily applied.

Die Bandbreiten innerhalb der vorgesehenen Beizanlage bleiben im wesentlichen konstant, es wird von Bändern mit einer Breite von 1300 mm ausgegangen. Über eine hinter der Beizeinrichtung vorgesehene Besäumeinrichtung für die Längskanten des gebeizten Bandes kann die Bandbreite im Bereich + 100 mm / - 100 mm verändert werden.The strip widths within the intended pickling line remain essentially constant; strips with a width of 1300 mm are assumed. The strip width can be changed in the range + 100 mm / - 100 mm via a trimming device for the longitudinal edges of the pickled strip provided behind the pickling device.

In einer besonders günstigen Ausgestaltung der Erfindung ist vorgesehen, daß die Aufwickeldorne auf einem Karussellhaspel mit Wendedorn und Leerplatz angeordnet sind. Das Pilotband wird beim Einfädeln des Warmbandanfanges durch die Beize auf den Dorn 1 des Wendehaspels aufgewickelt, der Haspel wird gewendet. Sobald der Warmbandanfang kommt, wird die Verbindungsstelle zwischen Pilotband und Warmband getrennt und das Warmband wird auf den zweiten Dorn des Wendehaspels aufgewickelt.In a particularly advantageous embodiment of the invention it is provided that the winding mandrels are arranged on a carousel reel with a turning mandrel and an empty space. When the hot strip begins, the pilot strip is wound onto the mandrel 1 of the turning reel by the pickle, the reel is turned. As soon as the hot strip begins, the connection point between the pilot strip and the hot strip is separated and the hot strip is wound onto the second mandrel of the turning reel.

Als Beizbehälter in der Beizanlage werden vorzugsweise an sich bekannte Turbolenz-Beizbehälter vorgesehen, in die Behandlungssäure eingedüst wird. Die Behälter werden vom Band in horizontaler Richtung durchlaufen, sie sind in kürzester Zeit über Pumpsysteme zu füllen oder zu entleeren, wobei darüberhinaus auch zur Anpassung an unterschiedliche Beizaufgaben die Temperatur der Säure in den Beizbehältern steuerbar ist.Known turbolence pickling tanks, into which treatment acid is injected, are preferably provided as pickling tanks in the pickling system. The containers are passed through by the belt in a horizontal direction, they are over in no time Filling or emptying pump systems, the temperature of the acid in the pickling tanks also being controllable to adapt to different pickling tasks.

Verschiedene innerhalb der Beizanlage vorgesehene Treiber sorgen für den Transport des Bandes durch die gesamte Anlage.Various drivers provided within the pickling line ensure that the strip is transported through the entire line.

Die Beizanlage läßt sich besonders vorteilhaft verwirklichen, wenn nach einem bevorzugten Merkmal der Erfindung die Prozeßteile der Beizanlage in mindestens drei Ebenen übereinander angeordnet sind, in denen das zweifach um 180° umgelenkte Band geführt ist. Durch diese Maßnahme baut die Anlage sehr kompakt, bei entsprechend groß gewähltem Abstand der einzelnen Etagen voneinander von beispielsweise 4 Metern ergeben sich für das Band nur Spannungen im elastischen Bereich.The pickling plant can be realized particularly advantageously if, according to a preferred feature of the invention, the process parts of the pickling plant are arranged one above the other in at least three levels, in which the strip which is deflected twice by 180 ° is guided. As a result of this measure, the system is built very compactly, with a correspondingly large spacing of the individual floors from one another of, for example, 4 meters, the belt only has tensions in the elastic range.

Die vorliegende Erfindung löst die Aufgabe der Kopplung einer Dünnbrammenstranggießanlage, eines Warmbandwalzwerkes und einer Beize zur Herstellung von dünnem Warmband in überraschend einfacher Weise. Die Anlage ist besonders geeignet für die Verarbeitung von kohlenstoffarmen Stählen (z.B. ST 37, ST 52 und ST10), die in großen Losgrößen wirtschaftlich hergestellt werden können. Die Anlage ist kompakt und baut einfach und ist auch kostengünstig herzustellen, weil infolge des Inline-Prozesses wesentliche Anlagenteile nur einmal benötigt werden. Das Handling der Anlage ist einfach und sicher, so daß ein gutes Kosten - Leistungsverhältnis zu erwarten ist.The present invention solves the task of coupling a thin slab caster, a hot strip mill and a pickle for the production of thin hot strip in a surprisingly simple manner. The system is particularly suitable for processing low-carbon steels (e.g. ST 37, ST 52 and ST10), which can be economically produced in large batch sizes. The system is compact and simple to build and is also inexpensive to manufacture because, due to the inline process, essential system parts are only required once. The handling of the system is simple and safe, so that a good cost-performance ratio can be expected.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird nachfolgend beschrieben.An embodiment of the invention is shown in the drawing and is described below.

In der einzigen Zeichnungsfigur ist mit 1 das letzte Gerüst einer Warmbandwalzstraße bezeichnet, die, unmittelbar hinter einer Dünnbrammengießanlage angeordnet, die Dünnbramme zu einem Band mit Endabmessungen im Bereich zwischen 2,5 mm und 1 mm auswalzt. Gefolgt von einem Treiber 2 für das Band ist im Anschluß an die Warmbandwalzstraße eine Kühleinrichtung 3 vorgesehen, in der das Band von ca. 850°C auf 680°C mild abgekühlt wird. Auslaufseitig der Kühleinrichtung 3, gefolgt von einem Walzentreiber 4 ist eine 38 m lange Ausgleichstrecke vorgesehen, die mit 5 bezeichnet ist und in der das Band über den gesamten Bandquerschnitt durch den Ausgleich von Außen- und Innentemperatur eine Temperatur von 680°C erhält. Nach einem weiterem Treiber 6 für das Band folgt eine weitere Kühlstrecke 7 für eine milde Kühlung des Bandes von 680°C auf 480°C, mit dem das Band, unterstützt durch einen weiteren Treiber 8 in die zweite Ausgleichstrecke 9 eingeführt wird. In dieser Ausgangsstecke wird der Bandquerschnitt auf eine Temperatur von 480°C vergleichmäßig, bevor das Band, unterstützt von einem weiterem Treiber 10 in einem Schlingenspeicher geleitet wird, wo es in bekannter Weise unter mehrfacher Umlenkung um in ihren Abständen veränderbare Rollen geführt wird. Am Ausgang dieses Schlingenspeichers 11 ist die Hefteinrichtung 12 vorgesehen, in der der Bandanfang des Bandes mit dem Ende eines bei 13 zugeführten Pilotbandes durch Heftung verbunden werden kann. Der Hefteinrichtung 12 ist eine Schere 14 vorgeordnet, in der Bandanfang begradigt werden kann. Unterstützt von einem weiteren Treiber 15 verläßt das Band B die Hefteinrichtung, deren Wirkweise später noch beschrieben wird, und wird bei 16 um 180° umgelenkt in einer zweiten Etage in der bisherigen Bandlaufrichtung entgegengesetzter Richtung zurückgeführt. Erneut durch Treiber 17 unterstützt gelangt das Band in eine dritte Kühlstrecke, wo es sehr schroff von 480° °C auf ca. 95°C abgekühlt wird. Die Kühlstrecke ist mit 18 bezeichnet. Erneut durch Treiber 19 unterstützt, gelangt das abgekühlte Band in eine ca. 25 m lange dritte Ausgleichstrecke 30, in der die Temperatur von ca. 95°C über dem gesamten Bandquerschnitt vergleichmäßigt wird. Bei 20 wird das Band erneut um 180° in seiner Durchlaufrichtung umgelenkt und gelangt, getrieben durch ein Umlaufkettengerüst, das mit 21 bezeichnet ist, in die Beizanlage, die insgesamt mit 22 bezeichnet ist. Die Beizanlage ist zusammengesetzt aus insgesamt 5 jeweils 18 m langen Beizbehältem, die als Turbulenzbeizen mit horizontalem Durchlauf für das Band ausgebildet sind. Die Beizbehälter sind mit 23 a bis 23 e bezeichnet. Über nicht dargestellte Pumpensysteme sind die Behälter wahlweise mit Säure füll- bzw. entleerbar.In the single drawing figure, 1 denotes the last stand of a hot strip rolling mill, which, immediately behind a thin slab caster, rolls the thin slab into a strip with final dimensions in the range between 2.5 mm and 1 mm. Followed by a driver 2 for the strip, a cooling device 3 is provided after the hot strip rolling mill, in which the strip is mildly cooled from approx. 850 ° C. to 680 ° C. On the outlet side of the cooling device 3, followed by a roller driver 4, a 38 m long compensation section is provided, which with 5 is indicated and in which the strip maintains a temperature of 680 ° C over the entire strip cross-section by balancing the outside and inside temperature. After a further driver 6 for the belt, there is another cooling section 7 for a mild cooling of the belt from 680 ° C. to 480 ° C., with which the belt is introduced into the second compensation section 9, supported by a further driver 8. In this outlet, the strip cross-section is evened out to a temperature of 480 ° C. before the strip, supported by a further driver 10, is passed into a loop store, where it is guided in a known manner with multiple deflection around rolls that can be changed in their intervals. At the exit of this loop storage 11, the stapling device 12 is provided, in which the beginning of the tape can be connected to the end of a pilot tape fed at 13 by stapling. The stapler 12 is preceded by a pair of scissors 14 in which the beginning of the tape can be straightened. Supported by a further driver 15, the tape B leaves the stapling device, the mode of operation of which will be described later, and is deflected at 16 by 180 ° on a second floor in the previous direction of tape travel in the opposite direction. Supported again by driver 17, the strip arrives in a third cooling section, where it is cooled very abruptly from 480 ° C. to approx. 95 ° C. The cooling section is designated 18. Again supported by driver 19, the cooled strip reaches an approximately 25 m long third compensation section 30, in which the temperature of approximately 95 ° C. is evened out over the entire strip cross section. At 20, the belt is again deflected by 180 ° in its direction of travel and reaches the pickling plant, which is designated by a total of 22, driven by a circulating chain frame, which is designated by 21. The pickling line is composed of a total of 5 pickling tanks, each 18 m long, which are designed as turbulence pickling with a horizontal pass for the belt. The pickling tanks are designated 23 a to 23 e. The containers can be filled or emptied with acid using pump systems (not shown).

Anschließend an die Beizeinrichtung folgt die bekannte Spülung des Bandes in den Spüleinrichtungen 24 mit darauf folgendem Trocknen in der Trockeneinrichtung 25 und ggf. ein Besäumen der Bandkanten in der Besäumschere 26. Ausgangsseitig der Beizanlage ist ein zweites Umlaufkettengerüst 27 angeordnet, in der der notwendige Bandzug zwischen diesem und dem ersten Umlaufkettengerüst 21 aufbringbar ist. Die Anlage endet mit einer Trommelteilschere 28 und dem Wendehaspel 29, in dem das fertige Band oder das Pilotband aufwickelbar ist.Following the pickling device, the known rinsing of the strip in the rinsing devices 24 follows, followed by drying in the drying device 25 and possibly trimming of the strip edges in the trimming shear 26. A second circulating chain stand 27 is arranged on the output side of the pickling system, in which the necessary strip tension is between this and the first circulating chain frame 21 can be applied. The The system ends with a drum shear 28 and the turning reel 29, in which the finished tape or the pilot tape can be wound.

Wie bereits bei der allgemeinen Beschreibung der Erfindung angedeutet, erfolgt das Einfädeln des Bandes in die Beize mit Hilfe eines bei 13 aufgewickelten, sich in der Anlage erstreckenden Pilotbandes, das in der Hefteinrichtung 12 mit dem Anfang des Bandes verbunden wird. Das Pilotband wird zusammen mit dem angehefteten Band durch die Gesamtanlage, einschließlich die Beizeinrichtung 22 gezogen und am Ende der Anlage auf den ersten Haspeldorn des Wendehaspels 29 aufgewickelt. Sobald der Anfang des Bandes in den Bereich des Wendehaspels gelangt, wird dieser vom Pilotband abgetrennt und auf den zweiten Haspeldorn des Wendehaspels 29 geleitet. Das Pilotband kann abgewickelt und zum nächsten Einfädelvorgang zurückgeführt werden, während das Warmband in bekannter Weise auf dem Wendehaspel aufgehaspelt wird. AlsPilotband wird zweckmäßigerweise ein gut biegsames Metallgewebeband verwendet, das beim Umführen durch die 180°-Umführungen keine großen Kräfte erfordert.As already indicated in the general description of the invention, the tape is threaded into the stain with the aid of a pilot tape which is wound at 13 and extends in the system and which is connected in the stitching device 12 to the beginning of the tape. The pilot tape is pulled together with the attached tape through the overall system, including the pickling device 22, and is wound onto the first coiler mandrel of the reversible reel 29 at the end of the system. As soon as the beginning of the band reaches the area of the reversible reel, it is separated from the pilot band and directed onto the second reel mandrel of the reversible reel 29. The pilot strip can be unwound and returned to the next threading process, while the hot strip is wound up in a known manner on the reversing reel. A good flexible metal fabric tape is expediently used as the pilot tape, which does not require any great forces when being guided through the 180 ° detours.

Die gesamte Anlage ist in der bevorzugten Ausführung zwischen dem letzten Gerüst der Warmbandwalzstraße und dem Wendehaspel 178 m lang. Diese kompakte Bauweise läßt sich erreichen, indem die Gesamtanlage in drei Etagen angeordnet ist, die jeweils 4 m von einander beabstandet sind. Die erste Kühlstrecke mit 10 m Länge ermöglicht ein Abkühlen mit den im Patentanspruch 2 angegebenen Geschwindigkeiten, die Ausgleichstrecke 1 mit 38 m Länge führt zu den angegebenen Temperaturen. Die zweite Kühlstrecke mit 15 m Länge wird von der zweiten Ausgangsstrecke gefolgt, für die ebenfalls eine Länge von 38 m vorgesehen ist. Für die Beizbehälter sind jeweils 18 m vorgesehen, die sich als ausreichend erwiesen haben, um selbst das dickste in der Anlage herzustellenden Band zu beizen.In the preferred embodiment, the entire system is 178 m long between the last stand of the hot strip mill and the turning reel. This compact design can be achieved by arranging the entire system on three floors, each 4 m apart. The first cooling section with a length of 10 m enables cooling at the speeds specified in claim 2, the compensation section 1 with a length of 38 m leads to the temperatures indicated. The second cooling section with a length of 15 m is followed by the second exit section, for which a length of 38 m is also provided. 18 m are provided for the pickling tanks, which have proven to be sufficient to pickle even the thickest strip to be produced in the system.

Mit einer solchen Anlage gelingt es erstmals, einen Inlineprozeß mit Dünnbrammen-Gießen, Walzen und Beizen kontinuierlich zu betreiben und damit ein verkaufsfähiges Warmband zu erzeugen, und zwar in großen Losgrößen, am günstigsten mit kohlenstoffarmen Stahlqualitäten. Als Walzstraße kommt jede beliebige, für die Verarbeitung von Dünnbrammen bekannte Anordnung von Verformungsgerüsten in Frage, so z.B. auch ein sog. PlanetenwalzgerüstWith such a system, it is possible for the first time to continuously operate an inline process with thin slab casting, rolling and pickling and thus to produce a salable hot strip in large batch sizes, preferably with low-carbon steel qualities. Any arrangement of deformation stands known for processing thin slabs can be considered as a rolling mill, e.g. also a so-called planetary mill stand

Claims (12)

Arbeitsverfahren zum Beizen eines in einer Dünnbrammenanlage erzeugten und im Anschluß daran warmgewalzten Bandes, insbesondere kohlenstoffarmen Stahlbandes, in einem unmittelbar an den Walzvorgang anschließenden kontinuierlichen Prozeß, der durch die Abfolge der folgenden Verfahrensschritte gekennzeichnet ist: a) mildes Kühlen des den Walzvorgang mit ≥ 880°C verlassenden Bandes in einer ersten Kühlstrecke auf 850° bis 680°C, b) Ausgleich von Rand- und Kerntemperaturen in einer ersten Erholstrecke auf eine gleichmäßige Querschnittstemperatur von ca. 680°C, c) mildes Kühlen des Bandes in einer unmittelbar folgenden zweiten Kühlstrecke von 680° bis auf 480°C, d) Ausgleich von Rand- und Kerntemperaturen in einer zweiten Erholstrecke auf eine gleichmäßige Querschnittstemperatur von ca. 480°C, e) schroffes Abkühlen des Bandes von 480°C auf ca. 95°C in einer dritten Kühlstrecke, f) Ausgleich von Rand- und Kerntemperaturen in einer dritten Erholstrecke auf eine gleichmäßige Querschnittstemperatur von ca. 100°C, g) Führen des Bandes durch eine der Banddicke und/oder der Bandlaufgeschwindigkeit angepaßten Anzahl von zu- und abschaltbaren chemischen Beizbehältern bei entsprechend angepaßten Beiztemperaturen und f) Spülen, Trocknen und Aufhaspeln des gebeizten Bandes. Working method for pickling a strip produced in a thin slab plant and subsequently hot-rolled, in particular low-carbon steel strip, in a continuous process immediately following the rolling process, which is characterized by the sequence of the following process steps: a) mild cooling of the strip leaving the rolling process with ≥ 880 ° C in a first cooling section to 850 ° to 680 ° C, b) compensation of marginal and core temperatures in a first recovery route to a uniform cross-sectional temperature of approx. 680 ° C, c) mild cooling of the strip in an immediately following second cooling section from 680 ° to 480 ° C, d) compensation of marginal and core temperatures in a second recovery section to a uniform cross-sectional temperature of approx. 480 ° C, e) abrupt cooling of the strip from 480 ° C. to approx. 95 ° C. in a third cooling section, f) compensation of marginal and core temperatures in a third recovery section to a uniform cross-sectional temperature of approx. 100 ° C, g) guiding the strip through a number of chemical pickling containers which can be switched on and off and which is adapted to the strip thickness and / or the strip running speed, with appropriately adapted pickling temperatures and f) rinsing, drying and reeling the pickled strip. Arbeitsverfahren zum Beizen eines in einer Dünnbrammenanlage erzeugten und im Anschluß daran warmgewalzten Bandes nach Anspruch 1,
dadurch gekennzeichnet,
daß bei im wesentlichen konstanter gewalzter Bandbreite von 1300 mm die Endwalzgeschwindigkeiten des Bandes und damit dessen Durchlaufgeschwindigkeiten durch die Behandlungsanlage auf die Enddicke des gewalzten Bandes abgestimmt ist, wobei gilt: Enddicke des Bandes 1,0 mm ≙ Endwalzgeschwindigkeit von 4,0 m/s. Enddicke des Bandes 1,5 mm ≙ Endwalzgeschwindigkeit von 2,7 m/s Enddicke des Bandes 2,0 mm ≙ Endwalzgeschwindigkeit von 2,0 m/s Enddicke des Bandes 2,5 mm ≙ Endwalzgeschwindigkeit von 1,6 m/s Working method for pickling a strip produced in a thin slab plant and subsequently hot-rolled according to claim 1,
characterized,
that with an essentially constant rolled strip width of 1300 mm, the final rolling speeds of the strip and thus its passage speeds through the treatment plant are matched to the final thickness of the rolled strip, the following applies: Final strip thickness 1.0 mm ≙ final rolling speed of 4.0 m / s. Final strip thickness 1.5 mm ≙ final rolling speed of 2.7 m / s Final strip thickness 2.0 mm ≙ final rolling speed of 2.0 m / s Final strip thickness 2.5 mm ≙ final rolling speed of 1.6 m / s Arbeitsverfahren zum Beizen eines in einer Dünnbrammenanlage erzeugten und im Anschluß daran warmgewalzten Bandes nach Anspruch 1 und 2, dadurch gekennzeichnet, daß zum Einführen des Bandes in die Behandlungsanlage ein zuvor eingefädeltes Pilotband endseitig mit dem Bandanfang verbunden wird, daß das Pilotband nach dem Durchlauf durch die Behandlungsanlage auf einem von zwei Haspeldomen aufgewickelt und nach Beendigung des Wickelvorganges vom Band getrennt wird, und daß das vom Pilotband getrennte Band auf dem zweiten Haspeldom aufgewickelt wird.Working method for pickling a strip produced in a thin slab plant and subsequently hot-rolled according to claims 1 and 2, characterized in that for introducing the strip into the treatment plant, a pilot strip previously threaded is connected at the end to the strip beginning, so that the pilot strip after passing through the Treatment system is wound on one of two reel domes and is separated from the tape after the winding process has ended, and that the tape separated from the pilot tape is wound on the second reel dome. Arbeitsverfahren zum Beizen eines in einer Dünnbrammenanlage erzeugten und im Anschluß daran warmgewalzten Bandes nach Anspruch, dadurch gekennzeichnet, daß das Pilotband wiederverwendbar ist.Working method for pickling a strip produced in a thin slab plant and subsequently hot-rolled according to claim, characterized in that the pilot strip is reusable. Arbeitsverfahren zum Beizen eines in einer Dünnbrammenanlage erzeugten und im Anschluß daran warmgewalzten Bandes nach Anspruch 1, dadurch gekennzeichnet, daß beim Zustellen von Anlagenteilen, wie Walzenwechsel, Austausch von Gießrohren oder zu Reparaturzwecken das angehaltene Band in der Behandlungsanlage verbleibt und als Pilotband für die nächste Beizkampagne verwendet wird.Working method for pickling a strip produced in a thin slab plant and hot-rolled thereafter according to claim 1, characterized in that when the parts of the plant are delivered, such as changing rolls, exchanging pouring pipes or for repair purposes, the stopped strip remains in the treatment plant and as a pilot strip for the next pickling campaign is used. Beizanlage zur Durchführung des Arbeitsverfahrens nach den Ansprüchen 1 bis 5 , die aus der Hintereinanderanordnung folgender kontinuierlich betreibbarer Prozeßteile besteht: a) mindestens eine Kühleinrichtung (3,7,18) mit jeweils anschließender Ausgleichsstrecke (5, 9, 30) b) eine Beizeinrichtung (22) mit mehreren zu- und abschaltbaren Beizbehältem (23a bis 23 e), die das Band (B) horizontal durchläuft c) Spül- (24) und Trockeneinrichtungen (25) für das gebeizte Band (B) d) eine Querteilschere (28) und e) mindestens zwei Aufwickeldorne (29) für das Fertigband, wobei zwischen den Prozeßteilen a) und b) ein Schlingenspeicher (11) und eine Hefteinrichtung (12) zum Zusammenfügen eines Pilotbandes mit dem zu beizenden Band (B) vorgesehen ist, das als Metallgewebeband mit guter Kurvenfähigkeit ausgebildet ist. Pickling plant for carrying out the working method according to claims 1 to 5, which consists of the sequential arrangement of the following continuously operable process parts: a) at least one cooling device (3, 7, 18), each with a subsequent compensation section (5, 9, 30) b) a pickling device (22) with several pickling containers (23a to 23e) which can be switched on and off and which runs horizontally through the belt (B) c) rinsing (24) and drying devices (25) for the pickled strip (B) d) a cross cutting shear (28) and e) at least two winding mandrels (29) for the finished tape, wherein between the process parts a) and b) a loop storage (11) and a stitching device (12) for joining a pilot tape with the tape to be pickled (B) is provided, which is a metal fabric tape is trained with good cornering ability. Beizanlage für ein in einer Dünnbrammenanlage erzeugtes und im Anschluß daran warmgewalztes Band nach Anspruch 6,
dadurch gekennzeichnet,
daß jeweils vor und hinter der Beizeinrichtung (22) eine Einrichtung (21,27) zum Aufbringen von Zugspannung auf das Band (B) vorgesehen ist, die aus Umlaufkettengerüsten besteht.Pickling plant for a strip produced in a thin slab plant and subsequently hot-rolled according to claim 6,
characterized,
that in front of and behind the pickling device (22) a device (21, 27) for applying tensile stress to the belt (B) is provided, which consists of circulating chain frames. Beizanlage für ein in einer Dünnbrammenanlage erzeugtes und im Anschluß daran warmgewalztes Band nach einem der Ansprüche 6 und 7 ,
dadurch gekennzeichnet,
daß hinter der Beizeinrichtung (22) eine Besäumeinrichtung (26) für die Längskanten des gebeizten Bandes (B) vorgesehen ist.Pickling plant for a strip produced in a thin slab plant and subsequently hot-rolled according to one of claims 6 and 7,
characterized,
that behind the pickling device (22) a trimming device (26) is provided for the longitudinal edges of the pickled strip (B). Beizanlage für ein in einer Dünnbrammenanlage erzeugtes und im Anschluß daran warmgewalztes Band nach Anspruch 6,
dadurch gekennzeichnet,
daß die Aufwickeldorne e) auf einem Karusselhaspel (29) mit Wendedom und Leerplatz für das Pilotband angeordnet sind.Pickling plant for a strip produced in a thin slab plant and subsequently hot-rolled according to claim 6,
characterized,
that the winding mandrels e) are arranged on a carousel reel (29) with turning freedom and empty space for the pilot tape. Beizanlage für ein in einer Dünnbrammenanlage erzeugtes und im Anschluß daran warmgewalztes Band nach Anspruch 6,
dadurch gekennzeichnet,
daß als Beizbehälter (23a bis 23e) ansich bekannte Turbulenz-Beizbehälter vorgesehen sind.Pickling plant for a strip produced in a thin slab plant and subsequently hot-rolled according to claim 6,
characterized,
that known turbulence pickling tanks are provided as pickling tanks (23a to 23e). . Beizanlage für ein in einer Dünnbrammenanlage erzeugtes und im Anschluß daran warmgewalztes Band nach Anspruch 8,
dadurch gekennzeichnet,
daß innerhalb der Anlage verschiedene Treiber (2, 4, 6, 10, 15, 17, 19,) für das Band (B) vorgesehen sind.. Pickling plant for a strip produced in a thin slab plant and subsequently hot-rolled according to claim 8,
characterized,
that various drivers (2, 4, 6, 10, 15, 17, 19,) are provided for the belt (B) within the system. . Beizanlage für ein in einer Dünnbrammenanlage erzeugtes und im Anschluß daran warmgewalztes Band nach Anspruch 6 ,
dadurch gekennzeichnet,
daß die Prozeßteile der Anlage in mindestens drei Etagen übereinander angeordnet sind, in denen das zweifach um 180° umgelenkte Band (B) geführt ist.. Pickling plant for a strip produced in a thin slab plant and subsequently hot-rolled according to claim 6,
characterized,
that the process parts of the system are arranged one above the other in at least three floors, in which the belt (B) deflected twice by 180 ° is guided.
EP97250023A 1996-02-08 1997-02-04 Method and device for in-line-pickling of hot rolled strip in sequence with thin slab production Expired - Lifetime EP0787808B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19606305A DE19606305C1 (en) 1996-02-08 1996-02-08 Method and device for in-line pickling of hot strips behind thin slab production plants
DE19606305 1996-02-08

Publications (2)

Publication Number Publication Date
EP0787808A1 true EP0787808A1 (en) 1997-08-06
EP0787808B1 EP0787808B1 (en) 2001-11-07

Family

ID=7785919

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97250023A Expired - Lifetime EP0787808B1 (en) 1996-02-08 1997-02-04 Method and device for in-line-pickling of hot rolled strip in sequence with thin slab production

Country Status (4)

Country Link
US (1) US5876522A (en)
EP (1) EP0787808B1 (en)
DE (2) DE19606305C1 (en)
ES (1) ES2163094T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0882804A1 (en) * 1997-06-05 1998-12-09 DANIELI & C. OFFICINE MECCANICHE S.p.A. Method for heat treating rolled stock and device to achieve the method
EP1789491B1 (en) 2004-09-16 2017-07-12 Evonik Röhm GmbH Use of polyalkyl(meth)acrylate bead polymers and moulding material for producing extruded moulded parts with a matt surface

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT407755B (en) 1998-07-15 2001-06-25 Andritz Patentverwaltung METHOD FOR STAINLESSING STAINLESS STEEL

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1093867A (en) * 1953-02-24 1955-05-10 Wuppermann Gmbh Theodor Process for hot manufacturing of strip iron totally or largely free of scale and device for carrying out this process
GB895889A (en) * 1960-01-05 1962-05-09 Thyssen Huette Ag Improved pickling plant for strip rolling mills
JPS5997705A (en) * 1982-11-26 1984-06-05 Hitachi Ltd Continuous rolling method
EP0370575A1 (en) * 1988-11-24 1990-05-30 Hoogovens Groep B.V. Method for the manufacture of formable steel
WO1995002706A1 (en) * 1993-07-13 1995-01-26 Andritz-Patentverwaltungs-Gesellschaft M.B.H. Method and plant for the manufacture of special steel blanks
JPH08294707A (en) * 1995-04-21 1996-11-12 Nippon Steel Corp Hot rolled steel strip manufacturing method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3623532A (en) * 1969-03-20 1971-11-30 Southwire Co Continuous pickling of cast rod
BE843167A (en) * 1975-06-24 1976-10-18 COOLING AND PICKLING OF A CONTINUOUS ROLLED MACHINE WIRE
US4007750A (en) * 1975-07-14 1977-02-15 Armco Steel Corporation Continuous sheet pickling apparatus
NL8702050A (en) * 1987-09-01 1989-04-03 Hoogovens Groep Bv METHOD AND APPARATUS FOR THE MANUFACTURE OF TIRE-DEFORMING STEEL WITH GOOD MECHANICAL AND SURFACE PROPERTIES.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1093867A (en) * 1953-02-24 1955-05-10 Wuppermann Gmbh Theodor Process for hot manufacturing of strip iron totally or largely free of scale and device for carrying out this process
GB895889A (en) * 1960-01-05 1962-05-09 Thyssen Huette Ag Improved pickling plant for strip rolling mills
JPS5997705A (en) * 1982-11-26 1984-06-05 Hitachi Ltd Continuous rolling method
EP0370575A1 (en) * 1988-11-24 1990-05-30 Hoogovens Groep B.V. Method for the manufacture of formable steel
WO1995002706A1 (en) * 1993-07-13 1995-01-26 Andritz-Patentverwaltungs-Gesellschaft M.B.H. Method and plant for the manufacture of special steel blanks
JPH08294707A (en) * 1995-04-21 1996-11-12 Nippon Steel Corp Hot rolled steel strip manufacturing method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 210 (M - 328) 26 September 1984 (1984-09-26) *
PATENT ABSTRACTS OF JAPAN vol. 097, no. 003 31 March 1997 (1997-03-31) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0882804A1 (en) * 1997-06-05 1998-12-09 DANIELI & C. OFFICINE MECCANICHE S.p.A. Method for heat treating rolled stock and device to achieve the method
US6096146A (en) * 1997-06-05 2000-08-01 Danieli & C. Officine Meccanichi Spa Method for heat treating rolled stock and device to achieve the method
EP1789491B1 (en) 2004-09-16 2017-07-12 Evonik Röhm GmbH Use of polyalkyl(meth)acrylate bead polymers and moulding material for producing extruded moulded parts with a matt surface

Also Published As

Publication number Publication date
EP0787808B1 (en) 2001-11-07
ES2163094T3 (en) 2002-01-16
US5876522A (en) 1999-03-02
DE19606305C1 (en) 1997-10-02
DE59705232D1 (en) 2001-12-13

Similar Documents

Publication Publication Date Title
DE69102280T2 (en) METHOD AND SYSTEM FOR THE PRODUCTION OF STEEL TAPE COILS DIRECTLY GENERATED FROM A HOT ROLLING MILL WITH COLD ROLLING PROPERTIES.
DE3241745C2 (en) Process for the production of hot-rolled steel strip from continuously cast raw material in directly successive work steps
EP1148956B1 (en) Working method and installation for the flexible and economical pickling and cold-rolling of metal strips
EP0264459A1 (en) Production of hot-rolled steel strip from continuously cast slabs
DE2256024A1 (en) PROCESS FOR ROLLING HOT METAL WORKS
DE69330683T2 (en) Process for descaling and cold rolling metal strip
EP0761326A1 (en) Installation for producing hot rolled thin strip
EP1519798A1 (en) Method and casting roller plant for the semi-endless or endless rolling by casting of a metal in particular a steel strip which may be transversely separated as required after solidification
DE60109846T2 (en) Method and plant for cold rolling
DE4041206C2 (en) Process and plant for the production of hot-rolled steel strip, in particular for stainless steels from continuously cast primary material
DE19606305C1 (en) Method and device for in-line pickling of hot strips behind thin slab production plants
DE4445716C2 (en) Process and production line for producing cold-rolled, stainless steel strip
EP1525060B1 (en) Method and device for the continuous production of metallic strips
DE3919836A1 (en) METHOD AND SYSTEM FOR COUPLING THE INITIAL WINDINGS AND / OR FINAL TURNS OF A WIRE HARNESS
WO1999058263A1 (en) System and method for producing steel strip
DE102018207026A1 (en) Multiflexible rolling mill
EP0560115A1 (en) Method and rolling mill for precision rolling wire or stock having a circular cross-section
DE1123879B (en) Process and plant for the continuous descaling of broadband in a continuous pickling plant
EP1107834A1 (en) Method and device for producing hot-rolled wide strip, notably from thin slabs
DE3816469A1 (en) Multi-strand continuous casting installation with a downstream continuous rolling mill
DE3513831C2 (en)
DE670460C (en) Process for cold rolling metal sheets and strips
DE2829058C2 (en) Method and device for pulling off a steel pipe wound into a pipe bundle for the purpose of further processing it on a straight pipe string
DE10109056B4 (en) Plant and method for treating a metal strip or sheet
DE2134405C3 (en) Method and device for reducing sheet metal strips in strip lines

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB IT

17P Request for examination filed

Effective date: 19970620

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SMS DEMAG AG

17Q First examination report despatched

Effective date: 20000418

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20011107

REF Corresponds to:

Ref document number: 59705232

Country of ref document: DE

Date of ref document: 20011213

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2163094

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20120227

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20120221

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20120221

Year of fee payment: 16

Ref country code: IT

Payment date: 20120224

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20120224

Year of fee payment: 16

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20130204

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20131031

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59705232

Country of ref document: DE

Effective date: 20130903

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130204

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130204

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130228

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130903

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20140409

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130205