EP0444297B1 - Procédé pour démarrer automatiquement une installation de coulée continue - Google Patents

Procédé pour démarrer automatiquement une installation de coulée continue Download PDF

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Publication number
EP0444297B1
EP0444297B1 EP90125000A EP90125000A EP0444297B1 EP 0444297 B1 EP0444297 B1 EP 0444297B1 EP 90125000 A EP90125000 A EP 90125000A EP 90125000 A EP90125000 A EP 90125000A EP 0444297 B1 EP0444297 B1 EP 0444297B1
Authority
EP
European Patent Office
Prior art keywords
stopper
opening
pouring
filling level
controlled
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.)
Revoked
Application number
EP90125000A
Other languages
German (de)
English (en)
Other versions
EP0444297A3 (en
EP0444297A2 (fr
Inventor
Armin Kursfeld
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.)
Stopinc AG
Original Assignee
Stopinc 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=4191298&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0444297(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Stopinc AG filed Critical Stopinc AG
Publication of EP0444297A2 publication Critical patent/EP0444297A2/fr
Publication of EP0444297A3 publication Critical patent/EP0444297A3/de
Application granted granted Critical
Publication of EP0444297B1 publication Critical patent/EP0444297B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/161—Controlling or regulating processes or operations for automatic starting the casting process
    • 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
    • B22D11/10—Supplying or treating molten metal
    • 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
    • B22D11/18—Controlling or regulating processes or operations for pouring
    • B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
    • 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
    • B22D11/18—Controlling or regulating processes or operations for pouring
    • B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
    • B22D11/183—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level by measuring molten metal weight

Definitions

  • the invention relates to a method for the automatic casting of a continuous casting system, in which metal melt is poured from a vessel in a controlled manner by means of a stopper closure provided therein, and a continuous casting mold which is closed at the bottom by a start-up head is filled with the melt, the stopper being filled according to system-specific program-controlled time intervals is moved open and closed several times, such that the stopper moved open and closed with different, system-specific program-controlled time intervals assigned to the system-specific program-controlled time intervals is controlled in such a way that it moves to full or throttled opening positions during the open movements brought.
  • a method of the type described at the outset is known from DE-A-3 421 344.
  • the opening and closing movements of the stopper are controlled in such a way that it is only fully opened once during pouring and is then only moved into positions in which it no longer closes.
  • Such a method allows only a very rough control of the melt outflow during casting, which can now also be adapted to the respective operating conditions of the continuous caster to a very limited extent.
  • the object of the present invention is therefore to improve the automatic casting with a stopper closure in such a way that great reliability and thus reliable casting can be achieved under the given conditions.
  • the object is achieved in a method of the type described in the introduction in that the stopper is brought into at least one full closed position during the closing movements, the respective closed position being measured and the subsequent opening paths each adaptively starting from the measured effective closed position of the stopper .
  • the method according to the invention enables sensitive control of the melt discharge during casting, because the pouring program is carried out by the or repeated full closing of the stopper closure, possibly in connection with throttled closed positions, can be sensitively adapted to the respective operating conditions of the continuous casting installation.
  • the one or more complete closure of the closure in the pouring phase creates the possibility of determining the subsequent opening paths based on the measured, effective closed position of the stopper, which means that the melt outflow is particularly closely adjusted to the respective operating conditions during the casting process.
  • the stopper is brought approximately into the full opening position in the first or in the first few openings, and its opening paths are consequently reduced with an increasing fill level of the melt in the mold.
  • the stopper is advantageously activated immediately before reaching the desired fill level with one or more opening paths corresponding to a stored average opening position during a pouring controlled at the desired fill level. This results in a continuous transition from controlled to regulated pouring.
  • the stopper is closed again in the measuring range when the fill level of the melt is reached, the start-up head is pulled out after a time interval starting from this stopper of the stopper and the stopper is opened again after the fill level has dropped to a stored fill level.
  • the opening / closing movements of the stopper are to be understood in the sense that these movements open or close the closure fully or throttled, or bring them back into the throttled position.
  • the effective closing position of the stopper is different on the one hand before each start of the pouring because of the insertion of the pouring sleeve (or pouring tube) into the fireproof liner, and on the other hand experience has shown after the first opening of the stopper when pouring on that when the stopper is closed again, its position changes by a certain amount.
  • each effective opening assumes the effective measured closed position, which in turn brings about a more precise definition of the casting process.
  • the invention can also be applied equally well to stopper-like closures.
  • molten metal 11 flows from a vessel 10 through a refractory pouring tube 12 arranged at its pouring opening into a mold 20.
  • the vessel 10 is usually an intermediate container which consists of a refractory lining and a steel jacket.
  • the amount of melt can be poured on in a controlled manner through a stopper closure 15 in the vessel 10 and subsequently poured off in a regulated manner.
  • the refractory stopper 15 is fastened to a support arm 16 and can be adjusted by means of an articulated lever 18 on a linkage 13, especially in an emergency, by hand or by a drive element 17 in the vertical direction.
  • the strand 23 formed by the solidified melt is pulled out by a take-off drive 24 at a take-off speed v.
  • the computer 30 can start the trigger drive 24 via a switch 32.
  • a weight measuring device 33 is also shown, with which the bath level in the vessel 10 can be determined indirectly.
  • a commercially available pressure cell 33 serves as a signal transmitter for the device 33.
  • the automatic casting according to the invention is started after the melt 11 has been poured into the vessel 10, either by manually operating a switch or automatically via the signal supplied by the weight measuring device 33 to the computer 30 as soon as it corresponds to the desired level.
  • the program-controlled casting process begins by briefly fully opening the stopper 15 into a position P2 and thus the first melt flowing into the mold 20. Before a time interval t 2 has elapsed, there is a first closing movement into a closing position P2 ′, in which it has been shown in practice that it sets itself apart from the closing position P1 by a certain amount.
  • This stroke position P2 ' is determined by the computer 30 and the stopper 15 is stored in the following opening paths by one stroke s in each case, which is adaptively based on this effective closed position P2'.
  • the program-controlled casting process then continues with time intervals t 2 ', t 3 , t 3 ', t 4 , t 4 ', t 5 and t 5 ' and the associated opening paths s 3 to s 5 with the positions P3 to P5.
  • the paths s 3 , s 4 and s 5 of the controlled open / close movements are reduced until they approach the average opening path s 7 during the subsequent regulated pouring, the path s 7 being stored in the computer 30 as an experience or calculated value.
  • a larger position P6 is then again provided for the opening path s 6 with the corresponding time interval t 6 , after which the stopper is opened by the path s 7 during the time interval t 6 .
  • the program-controlled casting process is ended by the computer 30; the latter transfers to an automatic fill level control in which a set fill level is adjusted, for example, to 80% of the measuring range by means of a PID controller integrated in the computer 30. Since the measuring range usually only covers the upper part of the mold 20, this takes place Transition from automatic pouring to regulated pouring as soon as the fill level of the melt reaches the measuring range 21.
  • the controller controls the stopper 15 accordingly via the control 36 and the drive 17, after which more or less amount of melt is poured into the mold 20.
  • the drive 17 is, for example, a piston / cylinder unit.
  • a position transmitter 19 and a measured value unit 37 deliver the actual value of the drive position to the computer 30 in a feedback signal.
  • a subordinate position controller in the computer 30 ensures the desired position of the drive 17 and thus of the plug 15.
  • the opening and closing paths s 2 to sn as well as the opening and closing times t 2 to tn are entered into the software 30 as parameters in the computer. These parameters are specifically designed for the respective continuous caster.
  • such a number of open / close movements are also programmed in the computer 30 that if after the sixth movement the actual fill level would not yet be within the measuring range, further program-controlled open / close movements would take place until the fill level reaches the measuring range and the controller can thus adjust it to the target level.
  • the start of the starting head 26 with a speed profile v 1 is indicated.
  • the starting time takes place approximately when the desired fill level h s is reached .
  • the mold 20 fills up during casting in accordance with the actual profile h ist shown.
  • the stopper can be opened into position P7 - provided the filling level has been reached in the measuring range - according to the dashed line according to Fig. 2 again brought under program control in the closed position.
  • the starting head 26 is pulled out in accordance with a take-off speed profile v 2 .
  • the stopper is opened in several partial steps by the opening path s 7 and then the fill level controller in the computer 30 takes over the fill level to the desired level h s . With this deliberate delay in pulling out the starting head 26, the solidification of the melt in the mold can be ensured as an additional measure.
  • FIG. 4 again shows a casting process according to the invention in a path / time diagram.
  • the stopper 15 is moved to the full opening position P2 and then moved to the throttled position P2 'by the closing path s 2 '. Even after the openings in positions P3 and P4 with reduced opening paths, the stopper is brought into throttled and not completely closed positions S 3 'or S 4 '.
  • Corresponding time intervals t 2 , t 2 ', t 3 , t 3 ', t 4 , t 4 ' are assigned to these open / close movements. Only after the opening in the position P5 is the stopper brought into the closed position P5 ', this during a time interval t 5 '.
  • the controller in the computer 30 takes over the casting process and brings the fill level of the melt in the mold to the desired level hs.
  • the process for automatic cast-on according to FIG. 4 makes it clear that the procedure according to the invention allows the plant-specific requirements to be taken into account very well and that a wide variety of filling processes can be achieved.
  • the invention is of course not limited to the casting process shown in the exemplary embodiments, but, as already mentioned, can be variably adapted for continuous casting plants with different requirements or for casting different types of steel by changing the parameters.
  • the invention is also not limited to a conventional stopper closure, but rather can be applied for known stopper-like systems, as is known, for example, in the published patent application (WO 88/04209).
  • the stopper has a cylindrical pin at its lower end, which projects into the pouring opening of the vessel and seals laterally together with the pouring sleeve.
  • the pin has at least one radial inlet opening on its circumference and one longitudinal opening extending from this.
  • the plug has a truncated cone-shaped shut-off surface above the peg, which forms an additional seal together with the end face of the pouring sleeve when the closure is closed.
  • the closure is opened and closed again by adjusting the height of the stopper.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Pinball Game Machines (AREA)

Claims (4)

  1. Procédé pour démarrer automatiquement une installation de coulée continue, suivant lequel du métal en fusion est coulé, de façon commandée, à partir d'une cuve au moyen d'un obturateur à tampon prévu dans cette cuve, et une lingotière, obturée dans le bas par un mannequin, est remplie à l'aide du métal en fusion, le tampon étant, pendant le remplissage, déplacé plusieurs fois dans le sens d'ouverture et de fermeture à des intervalles de temps commandés par un programme spécifique de l'installation, de manière que le tampon (15) déplacé lors du démarrage de la coulée dans le sens d'ouverture et de fermeture soit commandé avec des courses d'ouverture et de fermeture (s2 à sn) différentes, associées aux intervalles de temps (t1 à tn) commandés par un programme spécifique de l'installation, de telle sorte qu'il soit amené, pendant les mouvements dans le sens d'ouverture, dans des positions d'ouverture complète ou partielle (P2 à Pn), caractérisé par le fait que le tampon (15) est amené, pendant les mouvements dans le sens de fermeture, dans au moins une position de fermeture complète (P2', P5'), la position de fermeture respective (P2', P5') étant mesurée et les courses d'ouverture subséquentes (sn) étant définies respectivement de façon adaptative à partir de la position de fermeture effective mesurée du tampon (15).
  2. Procédé suivant la revendication 1, caractérisé par le fait que le tampon (15) est amené, pendant la ou les premières ouvertures (s2), sensiblement à la position d'ouverture complète (P2) et que ses courses d'ouverture (s3, s4, s5) sont ensuite réduites avec l'augmentation du niveau de remplissage (h) du métal en fusion dans la lingotière (20).
  3. Procédé suivant la revendication 2, caractérisé par le fait qu'immédiatement avant que le niveau de remplissage de consigne (hs) soit atteint, le tampon (15) est commandé avec une ou plusieurs courses d'ouverture en fonction d'une position d'ouverture moyenne mémorisée (P7) pendant une coulée régulée sur le niveau de remplissage de consigne (hs).
  4. Procédé suivant l'une des revendications précédentes, caractérisé par le fait que lorsque le niveau de remplissage (h) du métal en fusion atteint la zone de mesure, le tampon (15) est encore une fois fermé, que le mannequin (26) est extrait après un intervalle de temps (t7') à partir de cette fermeture du tampon et que le tampon est de nouveau ouvert après abaissement du niveau de remplissage à un niveau de remplissage mémorisé (hx).
EP90125000A 1990-02-28 1990-12-20 Procédé pour démarrer automatiquement une installation de coulée continue Revoked EP0444297B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH622/90A CH682376A5 (de) 1990-02-28 1990-02-28 Verfahren zum automatischen Angiessen von einer Stranggiessanlage.
CH622/90 1990-02-28

Publications (3)

Publication Number Publication Date
EP0444297A2 EP0444297A2 (fr) 1991-09-04
EP0444297A3 EP0444297A3 (en) 1992-06-17
EP0444297B1 true EP0444297B1 (fr) 1996-07-03

Family

ID=4191298

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90125000A Revoked EP0444297B1 (fr) 1990-02-28 1990-12-20 Procédé pour démarrer automatiquement une installation de coulée continue

Country Status (9)

Country Link
US (1) US5174361A (fr)
EP (1) EP0444297B1 (fr)
JP (1) JPH08224644A (fr)
KR (1) KR910021273A (fr)
AT (1) ATE139918T1 (fr)
CA (1) CA2037171A1 (fr)
CH (1) CH682376A5 (fr)
DE (1) DE59010404D1 (fr)
ZA (1) ZA91153B (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2677284B1 (fr) * 1991-06-07 1993-08-27 Pechiney Aluminium Procede et appareillage pour la coulee automatique de demi-produits.
FR2698806B1 (fr) * 1992-12-07 1995-01-06 Lorraine Laminage Procédé de remplissage automatique d'une lingotière de coulée continue, en début de coulée, et dispositif pour sa mise en Óoeuvre.
EP0611618A1 (fr) * 1993-02-13 1994-08-24 Inteco Internationale Technische Beratung Gesellschaft mbH Procédé et dispositif pour coulée continue d'un lingot
CH689728A5 (de) * 1995-03-28 1999-09-30 Concast Standard Ag Vorrichtung zum Regeln eines Zuflusses einer Metallschmelze mittels eines Stopfens.
US5709260A (en) * 1995-08-22 1998-01-20 Wagstaff, Inc. Molten metal admission control in casting
EP0855238A1 (fr) * 1997-01-24 1998-07-29 Alusuisse Technology & Management AG Procédé pour la coulée continue verticale de métaux
FR2766113B1 (fr) * 1997-07-16 1999-09-17 Usinor Procede de demarrage d'une operation de coulee continue des metaux
US6513571B1 (en) 1998-05-27 2003-02-04 Hayes Lemmerz International, Inc. Apparatus for automatic refilling of a low pressure casting machine
FR2843056B1 (fr) * 2002-07-31 2004-09-03 Realisations Tech Sert Soc Et Procede de demarrage automatique d'une installation de coulee continu et ensemble pour la mise en oeuvre de ce procede
US6896032B1 (en) 2002-09-26 2005-05-24 Hayes Lemmerz International, Inc. Stopper-poured molten metal casting vessel with constant head height
FR2859929B1 (fr) * 2003-09-23 2007-01-26 Realisations Tech Sert Soc Et Procede de demarrage automatique d'une installation de coulee continue et ensemble pour la mise en oeuvre de ce procede
KR101299094B1 (ko) * 2010-08-30 2013-08-27 현대제철 주식회사 래들 교환시 용강 오염범위 예측 방법
CN102133633B (zh) * 2011-04-21 2013-08-07 马鞍山钢铁股份有限公司 一种连铸机中间罐塞棒开闭机构
WO2014164911A1 (fr) * 2013-03-12 2014-10-09 Novelis Inc. Distribution de métal fondu intermittent
CN108145112B (zh) * 2016-12-05 2020-01-21 上海梅山钢铁股份有限公司 基于液位自动控制的板坯连铸塞棒控流自动开浇工艺

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Publication number Priority date Publication date Assignee Title
DE2928901C2 (de) * 1979-07-13 1983-12-15 Mannesmann AG, 4000 Düsseldorf Verfahren zum Angießen von Metallen und Vorrichtung dazu
JPS5668570A (en) * 1979-11-07 1981-06-09 Kobe Steel Ltd Method of controlling molten metal surface when starting up continuous casting
DE3010811C2 (de) * 1980-03-20 1984-08-09 Vsesojuznyj naučno-issledovatel'skij institut avtomatizacii černoj metallurgii, Moskva Einrichtung zum Regeln der Schmelzenzufuhr während des Anfahrens einer Stranggießanlage
DE3344127A1 (de) * 1982-06-09 1985-06-20 Brown, Boveri & Cie Ag, 6800 Mannheim Verfahren und vorrichtung zum fuellen einer stranggiesskokille beim angiessen eines stranges
DE3421344C2 (de) * 1984-06-08 1993-04-29 Krupp Stahl Ag, 4630 Bochum Verfahren und Vorrichtung zum automatischen Füllen einer Stranggießkokille beim Angießen eines Stranges
DE3509932A1 (de) * 1985-03-19 1986-10-02 Metacon AG, Zürich Verfahren zum anfahren einer stranggiessanlage
JPS61226157A (ja) * 1985-03-30 1986-10-08 Sumitomo Light Metal Ind Ltd 溶融金属の連続的鋳造方法
LU85878A1 (de) * 1985-05-07 1986-12-05 Arbed Verfahren zur automatischen steuerung des anfahrbetriebes einer metall-stanggiessanlage
DE3679950D1 (de) * 1985-09-02 1991-08-01 Nippon Steel Corp Verfahren zum regeln des anfangsstadiums beim stranggiessen.
DE3608503C2 (de) * 1986-03-14 1994-09-01 Stopinc Ag Verfahren zum automatischen Angießen eines Stranges einer Stranggießanlage
JPS6321586A (ja) * 1986-07-16 1988-01-29 Komatsu Ltd 地中探査装置の信号処理方法
BR8707558A (pt) * 1986-12-01 1989-02-21 Arva Ag Dispositivo de controle de fluxo e saida pra recipientes metalurgicos e processo de fundicao de metais derretidos

Also Published As

Publication number Publication date
US5174361A (en) 1992-12-29
KR910021273A (ko) 1991-12-20
JPH08224644A (ja) 1996-09-03
EP0444297A3 (en) 1992-06-17
CH682376A5 (de) 1993-09-15
EP0444297A2 (fr) 1991-09-04
CA2037171A1 (fr) 1991-08-29
ATE139918T1 (de) 1996-07-15
ZA91153B (en) 1991-11-27
DE59010404D1 (de) 1996-08-08

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