EP0855238A1 - Procédé pour la coulée continue verticale de métaux - Google Patents

Procédé pour la coulée continue verticale de métaux Download PDF

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Publication number
EP0855238A1
EP0855238A1 EP97810035A EP97810035A EP0855238A1 EP 0855238 A1 EP0855238 A1 EP 0855238A1 EP 97810035 A EP97810035 A EP 97810035A EP 97810035 A EP97810035 A EP 97810035A EP 0855238 A1 EP0855238 A1 EP 0855238A1
Authority
EP
European Patent Office
Prior art keywords
level
metal
molds
starting
casting
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.)
Withdrawn
Application number
EP97810035A
Other languages
German (de)
English (en)
Inventor
Eric Vuignier
Etienne Caloz
Jean-Pierre Seppey
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.)
3A Composites International AG
Original Assignee
Alusuisse Lonza Services Ltd
Alusuisse Technology and Management Ltd
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8230140&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0855238(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Alusuisse Lonza Services Ltd, Alusuisse Technology and Management Ltd filed Critical Alusuisse Lonza Services Ltd
Priority to EP97810035A priority Critical patent/EP0855238A1/fr
Priority to US09/355,241 priority patent/US6260603B1/en
Priority to EP98900062A priority patent/EP0959995B1/fr
Priority to DE59802528T priority patent/DE59802528D1/de
Priority to AU53053/98A priority patent/AU716841B2/en
Priority to PCT/CH1998/000004 priority patent/WO1998032559A1/fr
Priority to AT98900062T priority patent/ATE211039T1/de
Priority to CA002277959A priority patent/CA2277959C/fr
Publication of EP0855238A1 publication Critical patent/EP0855238A1/fr
Priority to IS5111A priority patent/IS2026B/is
Priority to NO993589A priority patent/NO993589L/no
Withdrawn 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
    • B22D11/14—Plants for continuous casting
    • B22D11/147—Multi-strand plants
    • 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

Definitions

  • the invention relates to a method for automatic vertical continuous casting metals, especially aluminum alloys, in a multi-mold Casting plant, in which process the liquid metal from in an oven through a trough to the molds and via nozzles with adjustable flow into the from on one lowerable casting table arranged approach floors first closed molds is passed, the metal flow rate each nozzle, starting from an initial time and an initial level of the metal at which the metal level control begins individually regulated in each mold is that the metal in all molds to a predetermined Starting time is essentially the same starting level has, in which the lowering of the casting table for generation the metal strands begins.
  • Crucial for the trouble-free operation of a multi-strand Casting system is mastery of the start-up process, i.e. the optimal control of the metal feed to the individual casting units until the actual casting start, which is initiated by lowering the casting table.
  • the metal flow rate by means of a motor-driven Plug rod can be set changeable can At the same time in a known manner about level measuring devices the metal level in each mold is measured continuously, compared with the setpoint and the difference between actual and setpoint by appropriate control of the plug rod drive in the associated Inject the speed of the metal feed into the mold customized.
  • From GB-A-2 099 189 is a metal level control for a multi-strand casting system known, with the reaching of a first metal level in a mold linearly increasing setpoint to a common for all molds second level is specified.
  • the regulation of Metal level in the individual molds is due to the increasing target value as soon as this in the individual molds is reached.
  • EP-B-0 517 629 discloses a method of the aforementioned Type in which the individual metal level control in every mold as soon as the incoming metal a predetermined minimum height above the respective approach floor has reached. Starting from this minimum height above the Approach floor, the level control takes place in each mold individual, linearly increasing setpoint curves, so that a predetermined, common level in all molds are reached at the same time.
  • a major disadvantage of the state of the art Technology with different filling curves for each mold is in danger of the system getting out of control, if one of the ingot molds becomes frozen due to premature solidification Metal melt not to be filled or with a great delay begins.
  • there can be big differences in the filling kinetics occur when lowering the casting table, if individual Fill molds too late and therefore towards the end of the filling process have a steep filling curve.
  • the algorithm also makes filling curves much more complicated.
  • the invention is therefore based on the object of a method to create the type mentioned, in which the metal stand in the individual molds during start-up and Chill filling phase in a simple way and in as much as possible a short time to start lowering the casting table predetermined level can be regulated without there is a risk of metal freezing.
  • the metal level during the filling process between the initial level at the start time and the start level at the start time in all molds simultaneously and as a function of time according to a setpoint curve that is identical for all molds N f (t) is regulated, the slope dN / dt of the setpoint curve being greater in a region starting from the starting level and smaller in an area against the starting level than the mean gradient between the starting and starting levels.
  • the part of the setpoint curve preferably extends with the major slope, starting from the initial level, in one Range from about 10 to 70%, preferably 30 to 60%, of the total Level increase.
  • the part of the setpoint curve with the a smaller slope against the starting level preferably extends over a range of 10 to 40%, preferably 15 up to 25% of the total level increase.
  • the method according to the invention starts the metal level control in all molds at the same time, as soon as in one mold the initial level has been reached. Conveniently also starts lowering the casting table with the approach floors, as soon as the start level is reached in a mold.
  • the metal level in the launder is also preferred Start of the filling phase of the start-up floors and the molds up to and with the stationary casting phase at a constant level held.
  • the metal feed into the molds based on the setpoint curve is preferably PID-controlled.
  • the setpoint curve shown in FIG. 2 can be divided into an area A starting from the initial value N o and into an adjoining area B running against the starting level N s . It is readily apparent that the area A of the setpoint curve is opposite the mean slope Ns-No ts-to has a larger slope. Accordingly, there is a smaller slope for area B.
  • the setpoint curve is formed by 6 pairs of measured values N x , t x .
  • the embodiment shown in the drawing relates to the continuous casting of an aluminum alloy in a conventional mold.
  • the inventive the process is also the same for other casting processes for example when casting in an electromagnetic Alternating field (EMC) applicable.
  • EMC electromagnetic Alternating field
  • the process is also not based on the casting of aluminum alloys limited.
  • Other materials with the inventive Processes can be cast into strands are e.g. Magnesium or copper alloys.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Manufacture And Refinement Of Metals (AREA)
EP97810035A 1997-01-24 1997-01-24 Procédé pour la coulée continue verticale de métaux Withdrawn EP0855238A1 (fr)

Priority Applications (10)

Application Number Priority Date Filing Date Title
EP97810035A EP0855238A1 (fr) 1997-01-24 1997-01-24 Procédé pour la coulée continue verticale de métaux
CA002277959A CA2277959C (fr) 1997-01-24 1998-01-07 Procede pour la coulee continue verticale de metaux
AU53053/98A AU716841B2 (en) 1997-01-24 1998-01-07 Method for vertical,continuous casting of metals
EP98900062A EP0959995B1 (fr) 1997-01-24 1998-01-07 Procede pour la coulee continue verticale de metaux
DE59802528T DE59802528D1 (de) 1997-01-24 1998-01-07 Verfahren zum vertikalstranggiessen von metallen
US09/355,241 US6260603B1 (en) 1997-01-24 1998-01-07 Method for vertical continuous casting of metals
PCT/CH1998/000004 WO1998032559A1 (fr) 1997-01-24 1998-01-07 Procede pour la coulee continue verticale de metaux
AT98900062T ATE211039T1 (de) 1997-01-24 1998-01-07 Verfahren zum vertikalstranggiessen von metallen
IS5111A IS2026B (is) 1997-01-24 1999-07-06 Aðferð við að steypa málma á lóðréttan og samfelldan hátt
NO993589A NO993589L (no) 1997-01-24 1999-07-22 FremgangsmÕte for vertikal, kontinuerlig stöping av metaller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP97810035A EP0855238A1 (fr) 1997-01-24 1997-01-24 Procédé pour la coulée continue verticale de métaux

Publications (1)

Publication Number Publication Date
EP0855238A1 true EP0855238A1 (fr) 1998-07-29

Family

ID=8230140

Family Applications (2)

Application Number Title Priority Date Filing Date
EP97810035A Withdrawn EP0855238A1 (fr) 1997-01-24 1997-01-24 Procédé pour la coulée continue verticale de métaux
EP98900062A Expired - Lifetime EP0959995B1 (fr) 1997-01-24 1998-01-07 Procede pour la coulee continue verticale de metaux

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP98900062A Expired - Lifetime EP0959995B1 (fr) 1997-01-24 1998-01-07 Procede pour la coulee continue verticale de metaux

Country Status (9)

Country Link
US (1) US6260603B1 (fr)
EP (2) EP0855238A1 (fr)
AT (1) ATE211039T1 (fr)
AU (1) AU716841B2 (fr)
CA (1) CA2277959C (fr)
DE (1) DE59802528D1 (fr)
IS (1) IS2026B (fr)
NO (1) NO993589L (fr)
WO (1) WO1998032559A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0995523A1 (fr) * 1998-10-23 2000-04-26 Alusuisse Technology & Management AG Installation de coulée continue verticale avec mesure optimisée du niveau de métal liquide
EP1486347A1 (fr) * 2003-06-12 2004-12-15 Fuji Photo Film B.V. Substrat en alliage d'aluminium pour une plaque d'impression lithographique et procédé de fabrication
JP6634542B2 (ja) * 2016-09-27 2020-01-22 ハイドロ アルミニウム ロールド プロダクツ ゲゼルシャフト ミット ベシュレンクテル ハフツングＨｙｄｒｏ Ａｌｕｍｉｎｉｕｍ Ｒｏｌｌｅｄ Ｐｒｏｄｕｃｔｓ ＧｍｂＨ 金属ストランドの複数鋳造のための方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2099189A (en) 1981-05-26 1982-12-01 Kaiser Aluminium Chem Corp Molten metal level control in continuous casting
EP0223078A1 (fr) * 1985-10-26 1987-05-27 Metacon AG Procédé de démarrage d'une installation de coulée continue à plusieurs lignes
EP0517629B1 (fr) 1991-06-07 1996-01-24 Aluminium Pechiney Procédé et appareillage pour la coulée automatique de demi-produits

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4567935A (en) 1981-05-26 1986-02-04 Kaiser Aluminum & Chemical Corporation Molten metal level control in continuous casting
US4730660A (en) 1984-09-05 1988-03-15 Metacon Aktiengesellschaft Process for casting molten metal into several strands
CH682376A5 (de) * 1990-02-28 1993-09-15 Stopinc Ag Verfahren zum automatischen Angiessen von einer Stranggiessanlage.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2099189A (en) 1981-05-26 1982-12-01 Kaiser Aluminium Chem Corp Molten metal level control in continuous casting
DE3205480A1 (de) * 1981-05-26 1982-12-16 Kaiser Aluminum & Chemical Corp., 94643 Oakland, Calif. Verfahren und einrichtung zum regeln des metallbadpegels in einer mehrzahl von vertikalen kontinuierlichen oder halbkontinuierlichen giesseinheiten
EP0223078A1 (fr) * 1985-10-26 1987-05-27 Metacon AG Procédé de démarrage d'une installation de coulée continue à plusieurs lignes
EP0517629B1 (fr) 1991-06-07 1996-01-24 Aluminium Pechiney Procédé et appareillage pour la coulée automatique de demi-produits

Also Published As

Publication number Publication date
NO993589D0 (no) 1999-07-22
EP0959995B1 (fr) 2001-12-19
AU716841B2 (en) 2000-03-09
NO993589L (no) 1999-09-24
IS5111A (is) 1999-07-06
EP0959995A1 (fr) 1999-12-01
AU5305398A (en) 1998-08-18
DE59802528D1 (de) 2002-01-31
WO1998032559A1 (fr) 1998-07-30
CA2277959A1 (fr) 1998-07-30
IS2026B (is) 2005-08-15
ATE211039T1 (de) 2002-01-15
CA2277959C (fr) 2004-03-16
US6260603B1 (en) 2001-07-17

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