EP2496373B1 - Agencement de remplissage de métal pour équipement de coulée continue - Google Patents

Agencement de remplissage de métal pour équipement de coulée continue Download PDF

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Publication number
EP2496373B1
EP2496373B1 EP10828596.6A EP10828596A EP2496373B1 EP 2496373 B1 EP2496373 B1 EP 2496373B1 EP 10828596 A EP10828596 A EP 10828596A EP 2496373 B1 EP2496373 B1 EP 2496373B1
Authority
EP
European Patent Office
Prior art keywords
metal
mould
casting
box
filling box
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
EP10828596.6A
Other languages
German (de)
English (en)
Other versions
EP2496373A1 (fr
EP2496373A4 (fr
Inventor
Arild HÅKONSEN
Jr. Harald Naess
Terje Iveland
John Olav Fagerlie
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.)
Norsk Hydro ASA
Original Assignee
Norsk Hydro ASA
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 Norsk Hydro ASA filed Critical Norsk Hydro ASA
Publication of EP2496373A1 publication Critical patent/EP2496373A1/fr
Publication of EP2496373A4 publication Critical patent/EP2496373A4/fr
Application granted granted Critical
Publication of EP2496373B1 publication Critical patent/EP2496373B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B22D11/10—Supplying or treating molten metal
    • B22D11/103—Distributing the molten metal, e.g. using runners, floats, distributors

Definitions

  • the present invention relates to metal filling equipment for continuous casting moulds, in particular moulds for the semi-continuous direct chill (DC) casting of aluminium sheet ingot or slabs of different dimensions.
  • Moulds of the above type includes a mould frame with a pair of facing side walls and a pair of facing end walls, the walls defining a mould with an upwardly open inlet for the supply of metal and a downwardly facing outlet provided with a starter block on a movable support to extend the ingot to be cast and which prior to each casting closes the downwardly facing opening.
  • the equipment further includes means for cooling the metal during casting.
  • metal is usually supplied to the mould from a holding furnace by means of a launder or open supply channel.
  • the furnace is tilted depending on the number of casting moulds, casting velocity etc. and thereby the amount of metal required to maintain the level in the launder is supplied in a controllable manner.
  • the metal level in the casting mould on the other hand is commonly controlled by means of a spout and stopper where the stopper in turn is activated and controlled by a float (Early solution) or an electric actuator.
  • This known type of transfer and metal filling equipment is encumbered with disadvantages, among other things poor metal distribution and oxide formation due to turbulent melt flow.
  • EP-A- 995523 is known a filling system for continuous casting equipment for aluminium sheet ingot where metal is transported to the casting mould from an furnace by means of a launder system and where a measuring apparatus for determining a metal melt level and a through flow regulator to control the metal supply in the mould depending on the difference of a pre-described theoretical value progression and the measured time-dependent metal melt level.
  • the measuring apparatus consists of two physically different working measuring systems each with a separate sensor fixed in a predetermined position with respect to the mould.
  • EP-B1 1648635 shows a low pressure continuous casting system where metal is transported from a holding furnace to the mould via a closed siphon type channel and where the metal level is controlled in the mould such that the metallostatic pressure is basically zero in the solidification zone.
  • a metal filling equipment for continuous casting moulds in particular equipment for the semi-continuous direct chill (DC) casting of aluminium sheet ingots or slabs which is cheap and simple to manufacture and use and which has excellent metal distribution, is reliable as regards metal level control and has low maintenance costs.
  • the equipment may easily be adapted to existing casting moulds (retrofit installations) as well as greenfield installations.
  • the invention is characterized by the features as defined in the attached independent claim1.
  • a conventional known apparatus 1 for casting aluminium sheet ingot may, as is shown in Figs. 1 and 2 , consist of one or more moulds 2.
  • An insulated launder or channel (not shown) is provided to transport hot liquid aluminium metal 8 from a holding furnace (not shown) to an insulated 9 distributor launder 3 provided above the moulds 2.
  • Metal is, during casting, supplied to the moulds 2 through a spout 5 and stopper 4 arrangement.
  • the opening and closing of the stopper 4 and thereby the amount of metal supplied to the moulds 2 is accomplished by an actuator 6 on the basis of signals from a metal level detector 7, striving to maintain the metal level in the mould at a desired constant height.
  • the disadvantage with this conventional spout and stopper casting equipment is further discussed above.
  • Figs. 3 and 4 shows casting equipment 1 according to the invention including four casting moulds 2 for sheet ingot.
  • Each mould 2 is equipped with indirect and direct water cooling arrangements (not shown) and are provided in a common frame construction (neither not shown).
  • the equipment is provided with a closed metal filling box or container 10.
  • the box 10 is preferably provided on a separate frame construction (not shown) above the moulds 2.
  • For each mould metal distributor outlets in the form of insulated pipe stubs 18 are protruding downwardly from the container 10.
  • at least two pipe stubs 18 are provided for each mould.
  • a lid17 is further provided in a sealing relation on top of the filling box 10 and is attached to it by means of a hinge 19 to obtain easy access for cleaning and maintenance.
  • Metal is supplied to the filling box 10 by means of a launder 11 from a holding furnace (not shown) and is admitted to the filling box through an inlet being controlled by a valve device 16 in the form of a stopper plug (spindle) 14 and seat 15.
  • the stopper 14 of the valve device 16 is in turn controlled by means of an electrically driven actuator 13 based on signals from a PLC control device (see later section).
  • a vacuum valve 20 with a hose connector (not shown) for connection to a vacuum source, whereby the hollow space 24 of the box may be set with a pressure (vacuum) below the atmospheric pressure.
  • the filling box as such is hinged to the frame construction at the connection 21 with the launder 11 and is thereby tiltable upwards in relation to the casting moulds 2 (see later section).
  • a dam or gate closure 22 is provided in the launder 11 up-stream of the filling box to hold back the metal from the holding furnace in an initial phase of the casting operation.
  • a metal level detector 23 is provided in relation to the mould/s to detect the metal level providing signals to a Programmable Logic Control (PLC - not shown) that controls the complete casting operation from beginning to end.
  • PLC Programmable Logic Control
  • the filling box as described above may be designed to supply metal to one, two or more casting moulds 2.
  • only one detector 23 for detecting the metal level in the moulds and only valve device for the control of the metal flow to the metal fillings box and the moulds is needed for the filling operation.
  • the equipment according to the invention is quite simple and cheap to manufacture and operate.
  • Figs. 5 - 13 show in cross sections of one of the moulds with the filling box 10 according to the invention in a sequence from the start to the end of a casting operation.
  • Fig. 5 shows the initial starting point of a casting operation where the mould 2 is ready for casting as the mould starter block 25 is in its upper position resting against the mould wall 26.
  • the holding furnace (not shown) is already tilted whereby liquid melt is filled in the launder 11 and is closed off by the dam 22 being in a lower position.
  • Fig. 6 shows a further step where the dam 22 of the launder 11 is lifted and the stopper 14 for the valve device 16 is open to enable metal entering the filling box 10.
  • the metal starts filling up the starter block 25 and the level in the box 10 is raised to the lower end of the metal distributor pipe stubs 18. At this point the pressure outside the box 10 and inside it is the same, atmospheric pressure.
  • the PLC initiates opening of the vacuum valve 20 and air is evacuated from the hollow space of the filling box 10.
  • the metal level will now raise inside the filling box to a desired level above the level in the launder 11 to obtain sufficient charge and even distribution of metal to the moulds.
  • the desired metal level in the mould/s is maintained and controlled by the flow of metal through the valve device 16 and stopper 14, as well as the pressure inside the metal filling box 10.
  • the starter block 25 starts moving downwards as is shown in Fig. 7 , and the cast aluminium ingot 28 is formed by solidification of the melted metal 27.
  • the stopper 14 based on signals from the PLC, closes and the metal flow to the filling box 10 is stopped. At the same time the vacuum inside the filling box is cotrolled such that the pressure inside the box approaches atmospheric pressure.
  • the PLC is programmed to calculate when to close the stopper 14 in relation to the remaining metal in the filling box 10 and the needed amount of metal to complete the casting operation such that no melt is left in the filling box or pipe stubs 18 when the ingot is fully cast.
  • the metal being left in the launder11 is tapped to a crucible through a hole in the launder, as shown in Fig. 9 , by removing a plug therein (not shown), or preferably, the melt is transferred back to the furnace.
  • the filling box 10 After tapping of most of the metal from the launder, the filling box 10 is tilted upwards about the hinge connection 21 as shown in Fig. 10 and the remaining metal is tapped from the launder as well as the filling box as the stopper 14 now also is opened. By doing this the filling box is drained such that freezing of metal in and around the piping stubs is prevented.
  • Fig. 11 shows the final position of the equipment after casting and prior to a new casting operation where the lid 17 is opened about the hinge 19 and the filling box is ready for cleaning and inspection and possible maintenance.
  • the metal filling box may be designed to supply metal to more or less than four casting moulds.
  • the lid 17 may not be hinged to the equipment, but may be just lifted off after each casting operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Continuous Casting (AREA)

Claims (7)

  1. Equipement de remplissage de métal pour une/des coquille(s) de coulée continue (2) pour la coulée semi-continue à refroidissement direct (DC) de lingots ou brames de feuilles d'aluminium de différentes dimensions où le métal est transféré d'un four de maintien via un chenal de coulée ou un canal de transfert de métal (11), où l'équipement comprend une boîte ou un contenant (10) de remplissage de métal fermé (10) fourni au-dessus de la/des coquille(s) (2), la boîte recevant du métal du four de maintien via le chenal de coulée ou le canal de transfert de métal (11), caractérisé en ce que le métal s'écoule vers la boîte (10) via une entrée contrôlée par un actionneur/dispositif de vanne (16) qui est contrôlé au moyen d'un capteur (23) qui détecte le niveau dans le/les coquille(s) de coulée (2), moyennant quoi la boîte de remplissage de métal est dotée de moyens d'évacuation d'air (20) pour obtenir un niveau de métal élevé à l'intérieur de la boîte pendant la coulée, et que des sorties de distribution de métal sous la forme de tronçons de conduite isolés (18) sont fournies pour chaque coquille, faisant saillie vers le bas depuis le fond de la boîte de remplissage de métal (10), en obtenant une distribution du métal améliorée, une température homogène du métal et un contrôle de niveau de métal à travers les coquilles.
  2. Equipement selon la revendication 1,
    caractérisé en ce que
    la boîte de remplissage de métal (10), par rapport à la/aux coquille(s) de coulée, est fournie sur une structure de cadre séparée.
  3. Equipement selon la revendication 1 et 2,
    caractérisé en ce que
    chaque coquille(2) est dotée de deux ou davantage de tronçons de conduite isolés (18).
  4. Equipement selon les revendications 1 - 3,
    caractérisé en ce que
    la boîte de remplissage de métal (10) est inclinable par rapport à la structure de cadre et à la/aux coquille(s).
  5. Equipement selon les revendications 1 - 4,
    caractérisé en ce que
    la boîte de remplissage de métal (1) est dotée d'un couvercle (11) facile à enlever.
  6. Equipement selon la revendication 5,
    caractérisé en ce que
    le couvercle (17) est articulé par rapport à la boîte de remplissage de métal (10) au moyen d'un agencement formant charnière (19).
  7. Equipement selon les revendications 1 - 6,
    caractérisé en ce que
    l'opération de coulée est contrôlée du début à la fin au moyen d'un contrôleur à logique programmable.
EP10828596.6A 2009-11-06 2010-11-05 Agencement de remplissage de métal pour équipement de coulée continue Not-in-force EP2496373B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20093305A NO333382B1 (no) 2009-11-06 2009-11-06 Metallfyllingsarrangement for kontinuerlig stopeutstyr
PCT/NO2010/000403 WO2011056078A1 (fr) 2009-11-06 2010-11-05 Agencement de remplissage de métal pour équipement de coulée continue

Publications (3)

Publication Number Publication Date
EP2496373A1 EP2496373A1 (fr) 2012-09-12
EP2496373A4 EP2496373A4 (fr) 2016-12-21
EP2496373B1 true EP2496373B1 (fr) 2018-06-06

Family

ID=43970129

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10828596.6A Not-in-force EP2496373B1 (fr) 2009-11-06 2010-11-05 Agencement de remplissage de métal pour équipement de coulée continue

Country Status (4)

Country Link
EP (1) EP2496373B1 (fr)
CN (1) CN102665965B (fr)
NO (1) NO333382B1 (fr)
WO (1) WO2011056078A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102430732B (zh) * 2011-11-29 2013-09-11 东北大学 内外双向冷却连铸镁合金和铝合金锭坯装置与工艺
CN103921074A (zh) * 2014-04-28 2014-07-16 明达铝业科技(太仓)有限公司 一种用于vvt上的阀体的锻造工艺
CN104148623B (zh) * 2014-07-14 2016-05-25 湖州织里荣华铝业有限公司 一种再生铝熔流槽
NO341337B1 (en) * 2015-07-03 2017-10-16 Norsk Hydro As Equipment for continuous or semi-continuous casting of metal with improved metal filling arrangement
WO2018060246A1 (fr) * 2016-09-27 2018-04-05 Hydro Aluminium Rolled Products Gmbh Procédé de coulée multiple de barres métalliques
CN107116207A (zh) * 2017-06-20 2017-09-01 重庆科技学院 一种铁水接斗防溅装置
CN112548055A (zh) * 2020-12-11 2021-03-26 西南铝业（集团）有限责任公司 用于超宽幅铝合金扁锭的半连续铸造的装置和方法

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
BE794857A (fr) * 1972-02-03 1973-05-29 Voest Ag Procede de separation d'inclusions non metalliques dans les metaux en fusion, et tubes de coulee pour l'accomplissement du procede
US3837614A (en) * 1973-06-12 1974-09-24 Femipari Kutato Intezet Casting apparatus with slidably mounted branch runners
DE2646707C3 (de) * 1976-10-13 1984-01-26 Mannesmann AG, 4000 Düsseldorf Tauchausguß aus feuerfestem Werkstoff für das Stranggießen von Stahl
JPS53138926A (en) * 1977-05-12 1978-12-04 Nippon Steel Corp Continuous casting method
JPS5835051A (ja) * 1981-08-26 1983-03-01 Kawasaki Steel Corp 連続鋳造機におけるタンデイツシユ
JPS5838645A (ja) * 1981-08-31 1983-03-07 Kawasaki Steel Corp 連続鋳造における鋳型への給湯設備および給湯方法
DE3328586C2 (de) * 1983-08-08 1985-09-05 Didier-Werke Ag, 6200 Wiesbaden Feuerfeste Kanalverbindung für Horizontal-Stranggießanlagen
DE19758142A1 (de) * 1997-12-19 1999-07-01 Mannesmann Ag Einrichtung zur Zuführung von Metallschmelze
NO320254B1 (no) * 2003-06-30 2005-11-14 Norsk Hydro As Metode og utstyr for kontinuerlig eller semikontinuerlig stoping av metall
NO333512B1 (no) * 2007-12-03 2013-06-24 Norsk Hydro As Anordning ved utstyr for kontinuerlig eller semi-kontinuerlig stoping av metall

Non-Patent Citations (1)

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Also Published As

Publication number Publication date
WO2011056078A1 (fr) 2011-05-12
CN102665965A (zh) 2012-09-12
EP2496373A1 (fr) 2012-09-12
CN102665965B (zh) 2016-06-15
NO20093305A1 (no) 2011-05-09
EP2496373A4 (fr) 2016-12-21
NO333382B1 (no) 2013-05-21

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