WO2013170847A2 - Procédé et dispositif pour produire un feuillard métallique sur une bande transporteuse en mouvement - Google Patents

Procédé et dispositif pour produire un feuillard métallique sur une bande transporteuse en mouvement Download PDF

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Publication number
WO2013170847A2
WO2013170847A2 PCT/DE2013/000265 DE2013000265W WO2013170847A2 WO 2013170847 A2 WO2013170847 A2 WO 2013170847A2 DE 2013000265 W DE2013000265 W DE 2013000265W WO 2013170847 A2 WO2013170847 A2 WO 2013170847A2
Authority
WO
WIPO (PCT)
Prior art keywords
metal strip
melt
conveyor belt
metal
width direction
Prior art date
Application number
PCT/DE2013/000265
Other languages
German (de)
English (en)
Other versions
WO2013170847A3 (fr
Inventor
Hellfried Eichholz
Karl-Heinz Spitzer
Sven Klawiter
Markus LANGEJÜRGEN
Original Assignee
Sms Siemag 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 Sms Siemag Ag filed Critical Sms Siemag Ag
Publication of WO2013170847A2 publication Critical patent/WO2013170847A2/fr
Publication of WO2013170847A3 publication Critical patent/WO2013170847A3/fr

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Classifications

    • 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
    • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
    • 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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0631—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a travelling straight surface, e.g. through-like moulds, a belt
    • 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
    • B22D11/122—Accessories for subsequent treating or working cast stock in situ using magnetic fields

Definitions

  • the invention relates to a method and an apparatus for producing a metal strip on a moving conveyor belt.
  • EP 1 827 720 B1 discloses a production process and a production plant for the endless production of hot-rolled thin flat products.
  • a melt of a high manganese-containing lightweight steel number is poured in a horizontal strip casting plant close to the final dimensions in a range between 6 to 20 mm on a conveyor belt and cooled under controlled inert gas atmosphere before reaching the monolithic roughing train.
  • the pre-rolled hot strip is selectively controlled in a substraight downstream device cooled, heated or maintained at temperature and reheated the edges of the hot strip.
  • the single-storey roughing road is followed by a single or multi-level finishing mill, a
  • Outlet roller table with a device for cooling the hot strip and upstream and downstream winding machines for winding the hot strip.
  • DE-OS 2023900, DE-OS 2202764 and DE 3008207 A1 disclose stripping techniques for equalizing the thickness distribution of the melt, which use magnetic fields for stripping liquid metal layers from other bodies made of metal. These Stripping techniques use electromagnetically induced forces to move the liquid
  • the proposed stripping methods preferably utilize stationary magnetic fields and are proposed for methods of galvanizing elongate metallic bodies.
  • the metal surface to be coated does not serve as a conveyor belt.
  • a method for uniforming a molten metal layer on a moving conveyor belt in which a stationary at least predominantly perpendicular to the surface of the metal layer magnetic field is generated, which is spatially and temporally variable and at least one in the transport direction of the Transport belt has moving magnetic traveling field.
  • Thickness distribution of the metal strip advantageously to achieve a constant thickness distribution of the metal strip in the width direction of the strip.
  • This object is achieved in a method for producing a metal strip by applying a molten metal to a moving ferromagnetic conveyor belt, via a magnet system formed by a magnetic yoke and coils an at least predominantly or substantially perpendicular to the surface of the molten metal
  • alternating electromagnetic field is generated, which is characterized in that the alternating field is formed by a widthwise direction of the metal strip extending and arranged parallel to each other electrically connected coil pair, which stationary-stationary over the entire width of the resulting metal strip acts on the melt in such a way that in the width direction of the metal strip a
  • This object is also achieved by a device for producing a
  • the electrically connected coil pair arranged in the width direction of the conveyor belt with an air gap over the molten metal or the resulting metal strip is subjected to an exciter current.
  • the coils are wound around poles of a yoke, which advantageously extends over the entire width of the melt or the solidifying metal strip, so that the coils have an elongated shape.
  • the yoke and the coils are designed so that even in the edge region of the metal strip results in a uniform magnetic field distribution.
  • the coils of the coil pair and the magnetic yoke form the magnet system, which should advantageously have a distance of about 5 to 40 mm to the surface of the molten metal, so that a sufficiently large magnetic field strength can form in the resulting air gap.
  • the field strength should not fall below 100 mT.
  • the excitation current of the coils is therefore advantageous per coil winding about 500 to 2000 A at frequencies of about 30 to 100 Hz. B. three existing coil windings, the exciting current is thus 1500 to 6000 A.
  • Conveyor belt forms a magnetic circuit.
  • the field lines under the magnetic poles of the yoke orthogonally dip into the liquid molten metal.
  • eddy currents in the width direction of the metal strip are induced in opposite directions thereto. These in turn generate their own magnetic field, which reacts with the acting alternating field in such a way that in the width direction of the metal strip vertical and horizontal forces acting on the molten metal magnetic forces are exerted.
  • the vertical force component presses perpendicular to the surface of the
  • the horizontally acting on the melt force component also has a
  • the stepless adjustability of current, frequency and current waveform allows the geometry of the forming weir and thus the melt currents to be influenced in a targeted manner with a view to equalizing the metal strip thickness.
  • a metal strip of high quality can be produced whose properties, such. B. the thickness distribution over the cross section, can be adjusted.
  • the metal band can be directly on the conveyor without the use of additional
  • Auxiliary devices such as. As mechanical stripping, and be prepared without a post-treatment.
  • alternating field which is perpendicular to the surface of the liquid metal layer or is perpendicular to the conveyor belt and is formed stationary over the entire width of the metal strip.
  • a weir in the width direction of the conveyor belt is constructed by this stationary alternating field due to the forces acting perpendicularly on the melt, which leads to a homogenization of the liquid metal layer in the width direction of the conveyor belt.
  • Current, frequency and waveform of the current are advantageously variably adjustable, so that a selective influence on the profile shape of the metal strip, for. B. in the edge regions, is possible.
  • the magnetic system according to the invention is connected to a cooling device.
  • the magnet system has cooling channels through which cooling fluid can flow and dissipate heat.
  • Conveyor belt are arranged in a cascade, so that the thickness profile can be further optimized.
  • An improved embodiment of the invention also provides that the magnet system is modular, and thereby manufacturing costs for differently designed
  • Magnetic systems can be lowered.
  • several modules can be arranged side by side.
  • Figure 1 is a schematic representation of a strip casting with a
  • FIG. 2 is a schematic detail view of the device according to the invention in one
  • FIG 3 as Figure 2 in a side view Figure 1 shows a schematic representation of a strip casting 1 with a device according to the invention for equalizing the melt, consisting of a circulating conveyor belt 2 and two pulleys 3, 3 * .
  • a side seal 4 which prevents the abandoned melt 5 can flow down to the right and left of the conveyor belt 2.
  • the melt 5 is transported by means of a pan 6 to the strip casting plant 1 and flows through an opening 7 located in the bottom of the pan into a feed vessel 8.
  • This feed vessel 8 is designed as an overflow vessel.
  • the discontinuous melt 5 is equalized according to the invention by an acting in the width direction of the metal strip and arranged at a distance from the surface of the discontinued melt 5 electromagnetic smoothing unit G.
  • a homogenization zone 10 at. This consists of a thermally insulated housing 1 1 and a roller table, not shown here.
  • the then following first stand 12 is formed either only as a pure drive unit, possibly with a small puncture or as a roll unit with a predetermined puncture.
  • an intermediate heating advantageously here as inductive heating z. B. in the form of a coil 13 is formed.
  • the actual hot forming of the pre-strip 9 to a hot strip 18 takes place in the following frame scale 14, wherein the first three stands 15, 15 ', 15 "effect the actual stitch reduction, while the last frame 16 is formed as a smoothing mill. After the last pass follows a cooling zone 17, in which the finished hot strip 18 is cooled down to coiler temperature.
  • a pair of scissors 20 is arranged between the end of the cooling section 17 and reel 19, 19 '.
  • This scissors 20 has the task of dividing the hot strip 18 transversely as soon as one of the two reels 19, 19 'is fully wound.
  • the beginning of the subsequent hot strip 18 is then passed to the second vacant reel 19, 19 '. This ensures that the tape tension is maintained over the entire tape length. This is particularly important in the production of thin hot strips.
  • FIG. 2 shows, in plan view, a schematic detail of the device according to the invention for equalizing the melt.
  • the electromagnetic smoothness unit G which consists of the yoke G1 and wound around the poles of the magnet yoke G1 coils G2 and G2 ', at a distance from the surface of the discontinued on the conveyor belt 2 melt 5 over the entire width of the conveyor belt second is arranged.
  • the conveyor belt 2 is laterally provided with boundaries 4, which thus pretend the width of the resulting pre-strip 9.
  • the magnet system itself is designed as a compact, modular, preferably gas-tight unit.
  • the eddy currents that form when a field alternating current is applied can be seen in the melt.
  • FIG. 3 shows in a side view of FIG. 2 the device according to the invention for equalizing the melt.
  • the vertical force component F presses here, especially below the turns of the coils G2 and G2 'perpendicular to the surface of the molten metal, so that the
  • Melt film in this area becomes thinner. This creates in the width direction of the metal strip from above "weir" for the flowing melt in the form that this is dammed in front of the weir with the effect that a portion of the melt 5 is deflected in the width direction of the conveyor belt 2, thereby homogenizing the Thickness of the melt film takes place.

Abstract

L'invention concerne un procédé pour produire un feuillard métallique, selon lequel un métal en fusion est déposé sur une bande transporteuse ferromagnétique en mouvement, un champ électromagnétique alternatif au moins majoritairement ou sensiblement perpendiculaire à la surface du métal en fusion étant généré au moyen d'un système magnétique formé par une culasse magnétique et une bobine. Ce champ alternatif est formé par une paire de bobines s'étendant dans le sens de la largeur du feuillard métallique et disposées parallèlement l'une à l'autre, ladite paire de bobines agissant de manière géostationnaire sur le métal en fusion sur toute la largeur du feuillard métallique en formation de façon à générer un flux électromagnétique dans le métal en fusion dans le sens de la largeur du feuillard métallique et de sorte qu'une force se superposant au champ alternatif s'exerce perpendiculairement au métal en fusion.
PCT/DE2013/000265 2012-05-16 2013-05-07 Procédé et dispositif pour produire un feuillard métallique sur une bande transporteuse en mouvement WO2013170847A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012010038.8 2012-05-16
DE102012010038.8A DE102012010038B4 (de) 2012-05-16 2012-05-16 Verfahren zum Herstellen eines Metallbandes auf einem bewegten Transportband

Publications (2)

Publication Number Publication Date
WO2013170847A2 true WO2013170847A2 (fr) 2013-11-21
WO2013170847A3 WO2013170847A3 (fr) 2015-01-29

Family

ID=49084707

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2013/000265 WO2013170847A2 (fr) 2012-05-16 2013-05-07 Procédé et dispositif pour produire un feuillard métallique sur une bande transporteuse en mouvement

Country Status (2)

Country Link
DE (1) DE102012010038B4 (fr)
WO (1) WO2013170847A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017104279A1 (de) 2017-03-01 2018-09-06 Salzgitter Flachstahl Gmbh Horizontale Bandgießanlage mit optimierter Kühlung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2023900A1 (en) 1969-05-19 1970-11-26 Allmänna Svenska Elektriska AB, Västeras (Schweden) Wiping excess metal from elongated metal - bodies
DE2202764A1 (de) 1972-01-21 1973-07-26 Demag Ag Verfahren zur regelung der ueberzugsdichte von mit fluessigem metall beschichteten baendern
DE3008207A1 (de) 1979-03-07 1980-09-11 Arbed Verfahren und anlage zur reglung der staerke von durch heissgalvanisierung aufgebrachten metallschichten
DE19917250B4 (de) 1999-04-16 2004-04-29 Mannesmann Ag Verfahren und Vorrichtung zum Vergleichmäßigen einer schmelzflüssigen Metallschicht
EP1827720B1 (fr) 2004-12-21 2008-04-09 Salzgitter Flachstahl GmbH Procede pour produire des feuillards a chaud en acier de construction leger

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6012265A (ja) * 1983-07-01 1985-01-22 Nippon Kokan Kk <Nkk> 凝固層厚さの測定方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2023900A1 (en) 1969-05-19 1970-11-26 Allmänna Svenska Elektriska AB, Västeras (Schweden) Wiping excess metal from elongated metal - bodies
DE2202764A1 (de) 1972-01-21 1973-07-26 Demag Ag Verfahren zur regelung der ueberzugsdichte von mit fluessigem metall beschichteten baendern
DE3008207A1 (de) 1979-03-07 1980-09-11 Arbed Verfahren und anlage zur reglung der staerke von durch heissgalvanisierung aufgebrachten metallschichten
DE19917250B4 (de) 1999-04-16 2004-04-29 Mannesmann Ag Verfahren und Vorrichtung zum Vergleichmäßigen einer schmelzflüssigen Metallschicht
EP1827720B1 (fr) 2004-12-21 2008-04-09 Salzgitter Flachstahl GmbH Procede pour produire des feuillards a chaud en acier de construction leger

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Publication number Publication date
WO2013170847A3 (fr) 2015-01-29
DE102012010038B4 (de) 2020-11-19
DE102012010038A1 (de) 2013-11-21

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