EP3122492B2 - Coulée semi-continue d'une barre en acier - Google Patents

Coulée semi-continue d'une barre en acier Download PDF

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Publication number
EP3122492B2
EP3122492B2 EP15702712.9A EP15702712A EP3122492B2 EP 3122492 B2 EP3122492 B2 EP 3122492B2 EP 15702712 A EP15702712 A EP 15702712A EP 3122492 B2 EP3122492 B2 EP 3122492B2
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EP
European Patent Office
Prior art keywords
strand
cooling
continuous casting
casting machine
cooling zone
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.)
Not-in-force
Application number
EP15702712.9A
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German (de)
English (en)
Other versions
EP3122492B1 (fr
EP3122492A2 (fr
Inventor
Christian Brugger
Susanne Hahn
Jens Kluge
Hans-Peter KOGLER
Johann Poeppl
Guoxin Shan
Susanne Tanzer
Heinrich Thoene
Franz Wimmer
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Primetals Technologies Austria GmbH
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Primetals Technologies Austria GmbH
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Application filed by Primetals Technologies Austria GmbH filed Critical Primetals Technologies Austria GmbH
Priority to EP17173954.3A priority Critical patent/EP3251773B1/fr
Publication of EP3122492A2 publication Critical patent/EP3122492A2/fr
Publication of EP3122492B1 publication Critical patent/EP3122492B1/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
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • 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
    • B22D11/124—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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1213—Accessories for subsequent treating or working cast stock in situ for heating or insulating strands
    • 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
    • B22D11/055—Cooling the moulds
    • 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
    • B22D11/08—Accessories for starting the casting procedure
    • 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
    • B22D11/1281—Vertical removing
    • 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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/20—Controlling or regulating processes or operations for removing cast stock
    • 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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
    • B22D11/225—Controlling or regulating processes or operations for cooling cast stock or mould for secondary cooling

Definitions

  • the present invention relates to a method for the semi-continuous casting of a strand, preferably a bloom, from steel in a continuous casting machine and a suitable continuous casting machine.
  • the continuous casting machine used is divided into three parts.
  • the cooled continuous mold typically made of copper or a copper alloy, for primary cooling of the strand is followed by a strand guide for supporting and guiding the strand with a secondary cooling, typically comprising a plurality of single-component (mostly so-called water-only nozzles) and / or multi-component nozzles (mostly so-called. airmist nozzles), for cooling the partially solidified strand shell, and a tertiary cooling zone for further cooling the strand.
  • a secondary cooling typically comprising a plurality of single-component (mostly so-called water-only nozzles) and / or multi-component nozzles (mostly so-called. airmist nozzles)
  • the continuous casting machine is designed as a vertical continuous casting machine with a vertical mold, a vertical strand guide and a vertical tertiary cooling zone.
  • liquid steel typically from a metallurgical vessel, such as a ladle or a pouring distributor
  • a metallurgical vessel such as a ladle or a pouring distributor
  • the liquid steel with the cold strand having a solidified beginning of the strand and one forms the partially solidified strand following the strand beginning (ie a solidified strand shell and a liquid core).
  • the flow from the metallurgical vessel into the continuous mold can be set, for example, using a slide valve or a plug drive.
  • the partially solidified strand is pulled out of the continuous mold, the casting level in the mold, which results from the inflow of liquid steel into the mold and the extraction of the partially solidified strand by driven strand guide rollers, being kept approximately constant.
  • the partially solidified strand is supported in the strand guide, guided and further cooled by the secondary cooling.
  • the secondary cooling has several cooling nozzles; at slow casting speeds, however, cooling by radiation can already be sufficient to form a stable strand shell.
  • the cooling intensities in the primary and secondary cooling are adjusted depending on the pull-out speed so that the shell of the partially solidified strand withstands the maximum ferrostatic pressure that occurs in the continuous casting machine.
  • the casting process is ended, for example by closing the metallurgical vessel.
  • a strand end of the strand which is typically not completely solidified, is formed.
  • the end of the strand is now pulled out of the continuous mold at least to such an extent that it comes to rest in the area of the secondary cooling or the tertiary cooling of the continuous casting machine.
  • the secondary cooling is ended at the latest when the end of the strand has passed the secondary cooling zone.
  • the partially solidified strand is now slowly, controlled or regulated in the tertiary cooling zone of the continuous casting machine until completely solidified - in comparison to continuous casting.
  • the cooling takes place in a controlled manner - decreasing more strongly in the foot area (ie in the area of the start of the strand) and towards the end of the strand ie in the area of the end of the strand.
  • the center of the partially solidified strand there is either a globular or dendritic structure with only extremely low segregations and porosities. With dendritic solidification, the dendrites cannot grow together in the strand center, thereby avoiding thread porosity in the strand center.
  • the solidified strand is conveyed out of the continuous casting machine.
  • the cooling of the partially solidified strand in the tertiary cooling zone is either controlled or regulated.
  • the target temperature for the cooling can be the surface temperature of the strand, or preferably a - in a 2 or 3-dimensional model containing the heat conduction equation for the strand and possibly taking into account the processes involved in the structural transformation - a structure composition calculated in real time in the center of the strand be used. This allows the cooling and the microstructure formation in the strand to be set very precisely.
  • the strand is cooled primarily by heat radiation and possibly by convection; spray cooling is typically not required.
  • any necessary annealing treatments of the strand for the purpose of relieving tension and further improving the structure can already be carried out in the tertiary cooling zone of the continuous casting machine.
  • the cooling at the start of the strand can be adjusted more than at the end of the strand without additional energy. Through targeted heating of the line, this can be ensured with additional energy. Finally, a slow cooling of the strand, possibly only locally, can be remedied by surface cooling of the strand.
  • the partially solidified strand In order to prevent the partially solidified strand from cooling too quickly in the tertiary cooling zone, it is advantageous if the partially solidified strand, preferably its outer surface, is heated in the tertiary cooling zone by a, preferably inductive, heating device. Alternatively, the strand can also be heated by a burner.
  • cooling of the partially solidified strand according to the invention should not occur too slowly, locally too slow cooling can be prevented if the partially solidified strand is cooled in the tertiary cooling zone by a preferably movable cooling device.
  • the heating device can be moved in the pull-out direction of the continuous casting machine.
  • the temperature of the strand can only be influenced by a single heating device without the need for distributed devices.
  • thermal insulation is preheated before the start of casting.
  • a particularly effective thermal insulation that also promotes the degassing of the melt that has not yet solidified and also protects against scaling consists in holding the strand in a vacuum or in an atmosphere of protective gas.
  • the insulation effect is either preset statically or is controlled or regulated during operation.
  • the setting can e.g. by swiveling insulation slats.
  • the insulation fins can be adjusted to different, but statically constant, swivel angles over the length of the strand.
  • the swivel angle can also be adjusted dynamically during the cooling phase. E.g. the swivel angle below - i.e. in the area of the beginning of the strand - larger than above, whereby the end of the strand is cooled more slowly than the beginning of the strand.
  • the cooled continuous mold preferably the continuous mold and the secondary cooling zone
  • the separated components transverse to the direction of extension of the continuous casting machine to another casting station, ie to another tertiary cooling zone.
  • a further strand can be cast, during which the strand previously produced is slowly cooled in the tertiary cooling zone.
  • the end of the strand is heated by a heating device, in particular an inductive heating device, an electric arc furnace, a plasma heater or by burning off exothermic covering powder.
  • a heating device in particular an inductive heating device, an electric arc furnace, a plasma heater or by burning off exothermic covering powder.
  • a stirring device such as a stirring coil is advantageous. This can advantageously be moved along the strand axis.
  • the partially solidified strand can be rotated in the tertiary cooling zone around its own axis alternately clockwise and counterclockwise. The reversal of direction ensures particularly intimate mixing inside the strand.
  • the cast strand is given a load-bearing shell as quickly as possible and the length of the secondary cooling can thereby be kept as short as possible, it is advantageous if the strand has a round cross section.
  • a similar effect can also be achieved with a strand with a three-round, four-round, etc. cross-section.
  • the continuous casting machine according to the invention is designed according to claim 10.
  • the lateral surface of the strand can be heated by the heating device, as a result of which the cooling (and thus the microstructure formation) in the central region of the partially solidified strand in the tertiary cooling zone of the continuous casting machine can be set very precisely.
  • the tertiary cooling zone has, in particular statically adjustable or dynamically controlled or regulated, heat insulation.
  • the continuous mold, the secondary and the tertiary cooling zone are arranged in a row (so-called in-line).
  • the productivity of the semi-continuous continuous casting machine is significantly increased if the continuous casting machine has a plurality of tertiary cooling zones which are offset transversely to the direction of extension of the continuous casting machine, the machine head of the continuous casting machine, comprising the continuous mold and preferably the secondary cooling zone, being connectable and separable to a tertiary cooling zone and at least that Machine head can be moved transversely to the direction of extension.
  • the machine head of the continuous casting machine comprising the continuous mold and preferably the secondary cooling zone, being connectable and separable to a tertiary cooling zone and at least that Machine head can be moved transversely to the direction of extension.
  • a single machine head can serve several tertiary cooling zones, so that a high throughput is achieved despite the slow cooling of the partially solidified strands.
  • the machine head is preferably moved to a further tertiary cooling zone, during which the strand is stationary. This does not interfere with the controlled or regulated slow cooling in the central area of the strand.
  • the strand can also be moved away from the machine head, if necessary with tertiary cooling.
  • the adjustable heat insulation has at least one - advantageously several - insulation panels (also called lamella) that can be moved in the pull-out direction of the continuous casting machine or pivoted to the pull-out direction. This allows the cooling rate of the partially solidified strand to be passive, i.e. without additional energy input.
  • a simple and robust continuous casting machine has a continuous pull-off carriage for pulling out the strand, the continuous pull-off carriage being movable in the pull-out direction, for example by spindle, rack or cylinder drives.
  • the beginning of the strand is supported by the cold strand on the strand puller.
  • the continuous draw-off carriage is connected to the machine head, the continuous draw-off carriage being movable with the machine head transversely to the pull-out direction.
  • the cast strand after the end of casting is e.g. parked on a pedestal on the hall floor and the machine head is moved to another tertiary cooling with the strand puller.
  • the slow cooling of the parked strand can e.g. be ensured by a thermal hood placed over the strand.
  • the machine head it would also be possible for the machine head to be stationary and the cast strand is movable transversely to the direction of extension.
  • the cast strand is placed on a pedestal, for example, whereby the pedestal together with the strand can be moved to a further tertiary cooling zone.
  • Fig 1a is poured from a ladle distributor, not shown, of liquid steel via a dip tube into a cooled continuous mold 2, the continuous mold 2 being fluid-tightly closed by the cold strand 6 at the start of casting of the continuous casting machine, so that a mold level M (also called a meniscus) is established in the mold.
  • a mold level M also called a meniscus
  • a solidified strand start 1a is formed (see Fig 1c ) out. Due to the primary cooling of the cooled continuous mold 2, the partially solidified strand 1b following the solidified strand start 1a against the pull-out direction A has not solidified, but rather has only a thin strand shell and a liquid core.
  • the continuous casting machine has a continuous take-off carriage 11, which comprises the cold strand 6 itself, a threaded spindle 12, a threaded nut 13 and a motor 14 for moving the continuous pull-off carriage 11 in the pull-out direction A.
  • the motor 14 is connected via a gear and the threaded spindle 12 to the threaded nut 13 and has a through drive for the threaded spindle 12.
  • strand 1 has already been pulled further out of the continuous mold 2, the strand 1 in the strand guide 3 following the mold 2 being supported by several strand guide rollers 3a, guided and cooled by a plurality of cooling nozzles 4a in the secondary cooling 4.
  • the strand 1 forms a load-bearing strand shell that can withstand the ferrostatic pressure. A breakdown of strand 1 is thus prevented.
  • Fig 1c the beginning of the strand 1a has already passed the secondary cooling 3 of the continuous casting machine and has entered the tertiary cooling zone 5.
  • the strand 1 is further slowly controlled or regulatedly cooled, so that solidification takes place in the center of the partially solidified strand 1b with an upward direction.
  • the tertiary cooling zone 5 has thermal insulation 9 and an in Fig 1f heater 7 shown.
  • thermal insulation 9 for tertiary cooling, the atmosphere between the strand 1 and the heat hood 9 being evacuated by a vacuum pump (here a jet pump 15).
  • a vacuum pump here a jet pump 15
  • a pressure connection of the jet pump 15 is connected to a compressed air network and the suction connection of the jet pump 15 to the space inside the heat insulation 9.
  • This measure also prevents oxidation, ie scaling, of strand 1;
  • the vacuum treatment degasses the melt that has not yet solidified in the strand.
  • the heat insulation 9 has a plurality of insulation panels 9a which can be closed independently of one another (opening angle 0 °), opened (opening angle 90 °) or partially opened (90 °> opening angle> 0 °).
  • Fig 1d the casting was ended in the continuous casting machine, so that a strand end 1c is formed.
  • the casting level M lies below the casting level shown in broken lines according to the method steps 1a-1c.
  • the Fig 1e shows the situation after the strand end 1c of strand 1 has passed through the secondary cooling zone 3, the secondary cooling has ended and the strand end 1c is flush with the upper end of the tertiary cooling zone 5.
  • the slow, controlled or regulated cooling of the partially solidified strand 1b is ensured by the heat insulation 9 and the heating of the strand by the heating device 7 which can be moved in the pull-out direction A (see Fig 1f ).
  • the strand end 1c is heated by an inductive head heater 10, so that the strand end 1c is prevented from cooling too quickly.
  • a round steel strand 1 with a diameter of 1200 mm and a length of 10 m was produced.
  • the pull-out speed of the strand 1 from the continuous mold 2 is 0.25 m / min. Due to the thermal insulation 9 and the reheating of the strand 1 by the movable heating device 7, the complete solidification of the strand 1 is only achieved after 13 hours.
  • the casting is ended quickly, it is advantageous to increase the throughput of the semi-continuous continuous casting process if the in Fig 1f Machine head, no longer shown, is separated from the tertiary cooling zone 5 and moved transversely to the pull-out direction A to a further tertiary cooling zone 5.
  • a new strand can be cast there, while the in Fig 1f strand 1 shown is cooled further slowly. After slow cooling of the strand 1 until it has completely solidified, the strand is conveyed out of the continuous casting machine, for example by a device according to the 8a and 8b .
  • FIG. 10 is a first alternative embodiment of the tertiary cooling zone 5 of FIG Fig. 1 shown.
  • the space between the strand 1 and the heat insulation 9 is evacuated by a jet pump 15, as a result of which good heat insulation and slow cooling are achieved.
  • the surface of the strand 1 is protected against scaling and the residual melt is degassed.
  • the jet pump is simple and wear-free; its pressure connection is connected to a compressed air connection P and its suction connection to the room to be evacuated within the tertiary cooling zone.
  • the blowing off can take place against ambient pressure U.
  • the inductive head heater 10 is advantageous compared to a plasma heater, since the magnetic field also acts through the thermal insulation of the strand end 1c.
  • the Fig. 2b shows a second alternative of the tertiary cooling zone 5 of FIG Fig. 1 .
  • the insulation lamellae 9a of the heat insulation 9 can be pivoted to the pull-out direction, so that the air change between the ambient air and the strand 1 can be set inside the tertiary cooling zone 9.
  • the insulation slats 9a on the right side of the strand 1 were closed and on the left side opened by 10 ° to the pull-out direction A.
  • the slats 9a can be adjusted either manually or by actuators.
  • the Fig. 3 shows schematically the time course of the travel path s of the inductive heating device 7 for reheating the outer surface of the strand 1.
  • the heating device 7 is drawn through in the upper region of the strand 1 and shown in dashed lines in the lower region. Since the solidification front shifts from the bottom to the top during cooling (ie from the start of the strand 1a to the end of the strand 1c), the travel s of the heating device 7 also decreases over time.
  • the Fig. 4 shows the temperatures in ° C according to Fig. 1 generated strand 1 in a sectional view 3h after casting start (part figure 1), 8.3h after casting start (part figure 2) and when the strand 1 has solidified, about 13h after casting start (part figure 3).
  • the time course of the temperatures of strand 1 at different positions on the surface and in the center of the strand are shown in Fig. 5 shown. It can be seen from this that the casting of the strand and thus also the primary and secondary cooling is ended 46 minutes after the start of casting and then the strand 1 is cooled in a controlled manner only by the tertiary cooling 5.
  • a vertical continuous casting machine according to the invention is shown in two views.
  • the liquid steel is poured from a pan 30 into the pouring distributor 31 via a shadow pipe, and then the melt flows into the continuous mold 2 via a dip pipe ( SEN ), not shown.
  • the primary cooling in the mold 2 forms a partially solidified strand 1 with a load-bearing strand shell.
  • the melt is influenced even further by an optional stirring device 32.
  • the strand 1 is supported in the strand guide 3, guided and further cooled in the secondary cooling zone 4.
  • At least the continuous mold 2, the stirring coil 32, the strand guide 3 with the secondary cooling zone 4, and optionally also the tertiary cooling zone 5, can be moved on a casting carriage 33 on the casting platform G.
  • the strand 1 with the cold strand 6 is pulled out of the continuous mold 2 via the strand withdrawal carriage 11.
  • the strand take-off carriage 11 is driven via four threaded spindles 12 and guided by additional guide rails 34, a motor being connected to the threaded nut 13 via a gear and the threaded spindle 12.
  • the casting carriage 33 can be moved transversely to the pull-out direction A to a further casting station, since the casting of the partially solidified strand, ie without the tertiary cooling of the strand 1, takes considerably less time than the tertiary cooling of strand 1 until it solidifies.
  • the strand 1 is slowly cooled by the thermal insulation 9 and possibly by a heating device, not shown here, so that the solidification takes place in the center of the strand with an upward-oriented solidification front.
  • FIG. 7 A more detailed representation of the machine head of the continuous casting machine from the Fig. 6a , 6b is in Fig. 7 shown.
  • the Fig. 8a, 8b schematically show an embodiment for the discharge of the solidified strand 1 from the tertiary cooling zone.
  • the strand 1 is laterally supported by two brackets 38, so that on the continuous casting machine there are also very different diameters (see floor plan of Fig 8a ) can be shed.
  • Fig 8a the strand 1 has already been swung out with respect to the vertical and lies on the brackets 38.
  • the strand 1 is placed on the roller drive 39 on a roller table 37, where it can be removed in the direction of the arrow.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Claims (17)

  1. Procédé de coulée semi-continue d'une barre (1) en acier dans une machine de coulée continue, la machine de coulée continue comprenant
    - une lingotière à base ouverte (2) refroidie pour le refroidissement primaire de la barre (1), avec ensuite
    - un guidage de barre (3) pour soutenir et guider la barre (1), comprenant un refroidissement secondaire (4) pour le refroidissement de la barre (1), et ensuite encore
    - un refroidissement tertiaire (5) pour poursuivre le refroidissement de la barre (1), comprenant les étapes de procédé suivantes :
    - démarrage de la coulée par la machine de coulée continue, de l'acier liquide étant coulé dans la lingotière à base ouverte (2) fermée par une fausse barre (6) et l'acier liquide formant avec la fausse barre une tête de barre (1a) entièrement solidifiée et ensuite une barre (1b) partiellement solidifiée ;
    - retrait de la barre (1b) partiellement solidifiée hors de la lingotière à base ouverte (2) ;
    - soutien et guidage de la barre (1b) partiellement solidifiée dans le guidage de barre (3), la barre (1b) partiellement solidifiée étant refroidie par le refroidissement secondaire (4) ;
    - fin de la coulée par la machine de coulée continue, la coulée d'acier liquide dans la lingotière à base ouverte (2) étant terminée et une queue de barre (1c) se formant ;
    - retrait de la queue de barre (1c) hors de la lingotière à base ouverte (2) ;
    - arrêt du retrait, de sorte que la queue de barre (1c) se trouve à l'extérieur de la lingotière à base ouverte (2) ;
    - arrêt du refroidissement secondaire (4) ;
    - refroidissement contrôlé ou régulé de la barre (1b) partiellement solidifiée jusqu'à la solidification totale de la barre (1) dans la zone de refroidissement tertiaire (5) de la machine de coulée continue, le refroidissement s'effectuant plus intensément au niveau de la tête de barre (1a) et de manière décroissante jusqu'à la queue de barre (1c) ;
    - extraction de la barre (1) hors de la machine de coulée continue.
  2. Procédé selon la revendication 1, caractérisé en ce que le refroidissement de la barre (1b) partiellement solidifiée dans la zone de refroidissement tertiaire (5) est réglé par l'influence d'au moins un moyen du groupe :
    - isolation thermique de la barre (1, 1b),
    - chauffage de la barre (1, 1b),
    - refroidissement superficiel de la barre (1, 1b).
  3. Procédé selon la revendication 2, caractérisé en ce que la barre (1b) partiellement solidifiée est chauffée grâce à un dispositif de chauffage (7) dans la zone de refroidissement tertiaire (5).
  4. Procédé selon la revendication 3, caractérisé en ce que le dispositif de chauffage (7) peut être déplacé dans la direction de retrait (A) de la machine de coulée continue.
  5. Procédé selon l'une des revendications 2 à 4, caractérisé en ce que la barre (1b) partiellement solidifiée est protégée d'un refroidissement trop rapide par une isolation thermique (9) dans la zone de refroidissement tertiaire (5).
  6. Procédé selon la revendication 5, caractérisé en ce que l'effet isolant de l'isolation thermique (9) est ajusté.
  7. Procédé selon l'une des revendications 2 à 6, caractérisé en ce que la queue de barre (1c) est réchauffée par un chauffage de tête (10).
  8. Procédé selon l'une des revendications 2 à 7, caractérisé en ce que la surface de la barre (1b) partiellement solidifiée est refroidie par un dispositif de refroidissement (4a) dans la zone de refroidissement tertiaire (5).
  9. Procédé selon l'une des revendications précédentes, caractérisé en ce que la barre (1b) partiellement solidifiée est brassée par un brasseur électromagnétique (32) fixe ou déplaçable dans la direction de retrait (A) dans la zone de refroidissement tertiaire (5), ou la barre (1b) partiellement solidifiée est tournée alternativement dans le sens horaire et dans le sens anti-horaire autour de son propre axe dans la zone de refroidissement tertiaire (5).
  10. Machine de coulée continue pour l'exécution du procédé selon l'une des revendications 1 à 9, comprenant
    - un dispositif pour le retrait d'une barre (1) hors d'une lingotière à base ouverte (2) et un dispositif (37, 38, 39) pour l'extraction de la barre (1) hors de la machine de coulée continue,
    - la lingotière à base ouverte (2) refroidie pour le refroidissement primaire de la barre (1), et ensuite
    - un guidage de barre (3) pour le soutien et le guidage de la barre (1), comprenant une zone de refroidissement secondaire (4) pour le refroidissement de la barre (1), et ensuite encore
    - une zone de refroidissement tertiaire (5) pour poursuivre le refroidissement de la barre (1), la lingotière à base ouverte (2) pour le refroidissement primaire, la zone de refroidissement secondaire (4) et la zone de refroidissement tertiaire (5) étant disposées de manière coaxiale dans une direction de retrait (A), caractérisée
    en ce que la zone de refroidissement tertiaire (5) comprend un dispositif de chauffage (8) pour le refroidissement contrôlé ou régulé de la barre (1b) partiellement solidifiée, dispositif qui agit sur une surface externe de la barre et est déplaçable dans la direction de retrait (A) dans la zone de refroidissement tertiaire (5).
  11. Machine de coulée continue selon la revendication 10, caractérisée en ce que la zone de refroidissement tertiaire (5) comprend une isolation thermique (9) à réglage statique ou à réglage contrôlé ou régulé.
  12. Machine de coulée continue selon l'une des revendications 10 à 11, caractérisée par plusieurs zones de refroidissement tertiaire (5) décalées perpendiculairement à la direction de retrait (A) de la machine de coulée continue, la tête de la machine de coulée continue, y compris la lingotière à base ouverte (2) et la zone de refroidissement secondaire (4), pouvant être reliées à une zone de refroidissement tertiaire (5) et séparées de celle-ci.
  13. Machine de coulée continue selon la revendication 12, caractérisée en ce que plusieurs zones de refroidissement tertiaire (5) sont disposées en arc ou linéairement les unes derrière les autres.
  14. Machine de coulée continue selon l'une des revendications 11 à 13, caractérisée en ce que l'isolation thermique réglable (9) comprend au moins un panneau isolant (9a) qui peut être déplacé dans la direction de retrait (A) ou pivoté par rapport à la direction de retrait (A).
  15. Machine de coulée continue selon l'une des revendications 11 à 14, caractérisée en ce que la machine de coulée continue comprend un chariot d'enlèvement de barre (11) pour le retrait de la barre (1), le chariot d'enlèvement de barre (11) pouvant être déplacé dans la direction de retrait (A).
  16. Machine de coulée continue selon les revendications 11 et 15, caractérisée en ce que le chariot d'enlèvement de barre (11) est relié à la tête de machine et les deux peuvent être déplacés transversalement à la direction de retrait (A).
  17. Machine de coulée continue selon l'une des revendications 11 à 15, caractérisée en ce que la tête de machine est fixe et la barre (1) peut être déplacée transversalement à la direction de retrait (A).
EP15702712.9A 2014-03-27 2015-01-27 Coulée semi-continue d'une barre en acier Not-in-force EP3122492B2 (fr)

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EP14162061 2014-03-27
PCT/EP2015/051619 WO2015079071A2 (fr) 2014-03-27 2015-01-27 Coulée semi-continue d'une barre en acier

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EP3122492B1 EP3122492B1 (fr) 2017-07-05
EP3122492B2 true EP3122492B2 (fr) 2020-06-10

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EP (2) EP3251773B1 (fr)
CN (1) CN106457371B (fr)
AT (3) AT515731B1 (fr)
RU (1) RU2675880C2 (fr)
WO (1) WO2015079071A2 (fr)

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EP3437757A1 (fr) 2017-08-04 2019-02-06 Primetals Technologies Austria GmbH Coulée continue d'une barre métallique
EP3437756B1 (fr) 2017-08-04 2021-12-22 Primetals Technologies Austria GmbH Coulée continue d'une barre métallique
EP3437759B1 (fr) 2017-08-04 2022-10-12 Primetals Technologies Austria GmbH Coulée continue d'une barre métallique
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KR102586739B1 (ko) * 2018-11-28 2023-10-06 프리메탈스 테크놀로지스 오스트리아 게엠베하 금속 스트랜드의 연속 주조
CN110369686A (zh) * 2019-07-03 2019-10-25 西安理工大学 一种铸铁水平连铸三次喷冷装置
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EP3885060A1 (fr) * 2020-03-25 2021-09-29 Primetals Technologies Austria GmbH Système de coulée en continu et procédé de fonctionnement du système de coulée en continu
WO2021231124A1 (fr) * 2020-05-13 2021-11-18 Corning Incorporated Appareils de moulage de verre avec buses de refroidissement réglables et leurs procédés d'utilisation
CN111468691B (zh) * 2020-06-12 2021-08-20 江苏隆达超合金股份有限公司 一种铜镍合金半连续圆铸锭引锭头
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CN113695545B (zh) * 2021-08-18 2023-03-24 中天钢铁集团有限公司 一种满足生产大规格线材冷镦钢的小方坯连铸方法
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CN114905016B (zh) * 2022-06-13 2024-01-12 武汉大西洋连铸设备工程有限责任公司 一种应用于铸坯凝固过程中的机械旋转搅拌装置

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Publication number Publication date
CN106457371B (zh) 2019-05-07
AT515731B1 (de) 2018-08-15
AT15223U1 (de) 2017-03-15
EP3251773B1 (fr) 2020-05-06
EP3122492B1 (fr) 2017-07-05
WO2015079071A3 (fr) 2015-07-30
EP3251773A1 (fr) 2017-12-06
EP3122492A2 (fr) 2017-02-01
RU2675880C2 (ru) 2018-12-25
AT515731A3 (de) 2017-01-15
RU2016141648A3 (fr) 2018-06-29
US10307819B2 (en) 2019-06-04
RU2016141648A (ru) 2018-04-27
AT515731A2 (de) 2015-11-15
WO2015079071A2 (fr) 2015-06-04
CN106457371A (zh) 2017-02-22
US20170216908A1 (en) 2017-08-03
AT15215U1 (de) 2017-03-15

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