EP0620062A1 - Stranggiessverfahren mit Kokillen-Aufsatz und Kokille zur Anwendung - Google Patents

Stranggiessverfahren mit Kokillen-Aufsatz und Kokille zur Anwendung Download PDF

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Publication number
EP0620062A1
EP0620062A1 EP94470007A EP94470007A EP0620062A1 EP 0620062 A1 EP0620062 A1 EP 0620062A1 EP 94470007 A EP94470007 A EP 94470007A EP 94470007 A EP94470007 A EP 94470007A EP 0620062 A1 EP0620062 A1 EP 0620062A1
Authority
EP
European Patent Office
Prior art keywords
riser
ingot mold
cast
solidification
passage
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.)
Granted
Application number
EP94470007A
Other languages
English (en)
French (fr)
Other versions
EP0620062B1 (de
Inventor
Eric Perrin
Jacques Spiquel
Jean-Marc Jolivet
Jacques Legoff
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.)
Unimetal SA
Ascometal SA
Sollac SA
Original Assignee
Unimetal SA
Ascometal SA
Sollac SA
Lorraine de Laminage Continu SA SOLLAC
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 Unimetal SA, Ascometal SA, Sollac SA, Lorraine de Laminage Continu SA SOLLAC filed Critical Unimetal SA
Publication of EP0620062A1 publication Critical patent/EP0620062A1/de
Application granted granted Critical
Publication of EP0620062B1 publication Critical patent/EP0620062B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B22D11/11—Treating the 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/0401—Moulds provided with a feed head

Definitions

  • the present invention relates to the continuous casting of metals, in particular steel.
  • the continuous casting operation consists schematically of pouring a molten metal into an ingot mold, essentially consisting of a tubular element without bottom defining a passage for the cast metal, but the walls of which, in copper or more generally made of copper alloy, are energetically cooled by water circulation, and from which a product already solidified externally over a few centimeters in thickness is also continuously extracted. Solidification then progresses towards the axis of the product and ends during the descent of the latter downstream of the mold in the so-called "secondary cooling" zone under the effect of water spray bars. The product obtained, bloom, billet or slab, is then cut to length, then laminated before shipment to the customer or processing on site, into bars, wires, profiles, plates, sheets, etc ...
  • the volume of cast metal contained in the riser serves as a buffer volume within which the flow turbulences which inevitably develop under the effect of the incoming metal flow are absorbed and therefore have no more effect at the level of the copper element where solidification begins.
  • the subject of the present invention is firstly a process for the continuous casting under load of molten metals, in particular steel, in an ingot mold comprising a metallic tubular element, generally made of copper or a copper alloy, energetically. cooled, defining a passage for molten metal and intended to initiate the solidification of the cast metal on contact with it, process according to which an extension is placed on said body in rigid thermally insulating refractory material which extends said passage upwards, and in this that, at the level of this riser, or at least at its base, a pressurized gas is injected which escapes into the passage for the cast metal in the form of a jet distributed annularly, along the periphery of the mold.
  • the invention also relates to an ingot mold for continuous casting under load of metals, in particular steel, comprising a metallic tubular element, generally made of copper or copper alloy, vigorously cooled, defining a passage for the cast metal and intended to initiate the solidification of the cast metal on contact with it and an extension in rigid heat-insulating refractory material implanted directly on the tubular element and extending it upwards, an ingot mold characterized in that means are provided for creating in the passage for the metal poured at the level of the riser, and preferably at least at the level of the riser-tubular element interface, a gas jet distributed annularly around the periphery of the ingot mold
  • the invention aims to obtain, by virtue of the shearing effect produced by the gas jet on any parasitic solidification in the refractory riser, a start of solidification at the level of the tubular element in copper and only there, and therefore not to start the solidification process of the product already cast within the riser.
  • Figure 1 is shown in 1 the tubular element of copper cooled by a circulation of water from a mold for continuous casting of steel surmounted by an extension 2 of rigid refractory material having thermal insulating properties high, here a mixture of alumina and silica at 90 and 10% by weight respectively.
  • the element 1 of the ingot mold internally defines a passage 3 for the molten metal 4.
  • This metal is brought, from a distributor not shown situated above, by an immersed nozzle 5 with lateral outlet openings 6.
  • the cast product is extract the mold from below at a speed such that the free surface 7 of the metal cast in an ingot mold (meniscus) is established at a medium height level located in the riser 2 at a little more than about ten cm above the copper body 1.
  • the meniscus 7 is conventionally covered with a covering slag 19 formed from a regular supply of powder or granules melting at the temperature of the liquid metal and having the usual properties of protection against thermal losses by radiation and against oxidation of the molten metal.
  • a narrow slot 8 is formed at the interface between the metallic element and the enhancement thanks to a spacing 9 formed by a steel sheet a few tenths thick inserted between the copper body 1 and the enhancement 2 This steel sheet is arranged at the periphery of the interface so as to close the slot 8 towards the outside of the ingot mold and thus authorize its outlet communication only the casting space 3.
  • a sealed box 10 externally envelops the riser 2 and the upper part of the copper element 1 so that the outer surface 16 of the riser 2 constitutes a wall of the box.
  • This box receives, via its supply pipe 11, argon under pressure from a source not shown and supplies this gas with the slot 8, by means of pipes 12 hollowed out in the refractory mass and opening on one side to the external surface. 16 of the riser and the other end of which is stitched onto an annular gas distribution chamber 13 formed at the base of the riser at the end of the injection slot 8.
  • an annularly distributed gas jet can be projected into the interior space 3 of the mold.
  • This jet by its energy, breaks the velocity which the local primers for solidification can present 14 parasites of the metal cast from the refractory riser 2 to constitute the start of the solidification of the product 4.
  • the latter is forced to start under the gas jet against the copper wall of the mold to form a regular and continuous crust which increases in thickness as it progresses down the mold, in accordance with the usual solidification process in conventional continuous casting molds.
  • the pressure of the gas in the box to carry out the injection successfully can amount to 1.5 bar relative. Also, seals 17 have been provided at the junction of the box and the refractory block 2.
  • FIG. 2 Another embodiment of the invention, visible in FIG. 2, consists in replacing the single-slot system at the riser-element interface in copper with a network of parallel slots 18 superimposed in layers according to the height of the riser 2 and crossing it right through.
  • the slots are closer to each other in the lower part of block 2, in order to compensate for the pressure losses due to the higher ferrostatic pressure at this location.
  • a sustained gas flow will be injected into the lower part of the riser 2, because this is where we can intervene one last time before the desired start of solidification of the metal cast in contact with the cold wall. of the copper element 1.
  • the height of the refractory riser 2 is of the order of 20-25 cm, its part containing the liquid metal being at least ten cm, which allows to largely take into account the relative fluctuations in height of the meniscus 7 due to the usual vertical oscillation of the mold.
  • the gas outlet pressure at the base of the riser is therefore preferably of the order of 1.5 to 3 bars.
  • the single low annular slot 8, or the stepped slots 18 formed in the refractory riser can each be replaced by a plurality of channels distributed radially and arranged sufficiently close to one another to ensure a uniform gas jet around the inside periphery of the mold.
  • the general term "slot" will also be kept to designate them.
  • the distribution chamber may be provided machined in the copper of the tubular element 1.
  • the inlet channels 12 will be drilled in the copper element instead of being in the refractory mass of the riser.
  • the invention applies to any continuously cast or pourable product, whatever its format (billets, blooms, slabs).
  • its implementation is not limited to casting with submerged nozzle and cover slag, but may very well be used in free-jet casting, with preferably in this case the presence of a flexible sleeve the air connecting the top of the riser to the bottom of the distributor placed above to avoid reoxidation of the molten metal.
  • the invention is of application reserved for gravity continuous casting installations, that is to say provided with vertical or curved ingot molds, to the exclusion of any other, especially the molds for horizontal continuous casting.
  • cooled tubular element reference 1 in the figure
  • reference 1 is meant not only a monolithic tube for casting blooms or round or quadrangular billets, or a conduit formed by assembling plates for casting elongated formats such as slabs, but it should also be understood for example two cylinders rotating in opposite directions opposite one another to directly pour thin strips, or any other form of ingot mold with accompanying walls.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Casting Devices For Molds (AREA)
  • Manufacture And Refinement Of Metals (AREA)
EP94470007A 1993-03-30 1994-03-28 Stranggiessverfahren mit Kokillen-Aufsatz und Kokille zur Anwendung Expired - Lifetime EP0620062B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9303871 1993-03-30
FR9303871A FR2703609B3 (fr) 1993-03-30 1993-03-30 Procédé de coulée continue en charge des métaux et lingotière pour sa mise en Óoeuvre.

Publications (2)

Publication Number Publication Date
EP0620062A1 true EP0620062A1 (de) 1994-10-19
EP0620062B1 EP0620062B1 (de) 1998-06-03

Family

ID=9445661

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94470007A Expired - Lifetime EP0620062B1 (de) 1993-03-30 1994-03-28 Stranggiessverfahren mit Kokillen-Aufsatz und Kokille zur Anwendung

Country Status (6)

Country Link
EP (1) EP0620062B1 (de)
AT (1) ATE166812T1 (de)
DE (1) DE69410688T2 (de)
DK (1) DK0620062T3 (de)
ES (1) ES2117238T3 (de)
FR (1) FR2703609B3 (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0743114A1 (de) * 1995-05-17 1996-11-20 UNIMETAL Société Française des Aciers Longs Verfahren zur Schmierung der Wände einer Stranggusskokille für Metalle und Kokille zur Durchführung dieses Verfahrens
FR2747062A1 (fr) * 1996-04-05 1997-10-10 Ugine Savoie Sa Lingotiere de coulee continue pour la coulee continue en charge verticale des metaux
FR2747059A1 (fr) * 1996-04-05 1997-10-10 Ugine Savoie Sa Procede de coulee continue des metaux et lingotiere pour sa mise en oeuvre
FR2747063A1 (fr) * 1996-04-05 1997-10-10 Ugine Savoie Sa Lingotiere de coulee continue en charge verticale des metaux
FR2747060A1 (fr) * 1996-04-05 1997-10-10 Ugine Savoie Sa Procede de coulee continue des metaux et installation de coulee pour sa mise en oeuvre
WO1998056521A1 (fr) * 1997-06-12 1998-12-17 Sollac Tete de lingotiere pour la coulee continue verticale en charge de produits metalliques a format allonge
FR2765126A1 (fr) * 1997-06-26 1998-12-31 Lorraine Laminage Procede de coulee de metal liquide dans un conduit comprenant au moins deux pieces refractaires
FR2766394A1 (fr) * 1997-07-23 1999-01-29 Ascometal Sa Reglage de la tete d'une lingotiere de coulee continue en charge des metaux
EP1097762A1 (de) * 1999-11-05 2001-05-09 Usinor Grossflächige Vertikal-Stranggiesskokille mit Aufsatz zum Stranggiessen von Metallen
EP1120180A1 (de) * 2000-01-26 2001-08-01 DANIELI & C. OFFICINE MECCANICHE S.p.A. Verfahren und Vorrichtung zum Stranggiessen von Metall
US20110100582A1 (en) * 2008-06-30 2011-05-05 Nippon Light Metal Company, Ltd. Gas pressure controlled casting mold
WO2013021221A2 (en) 2011-08-11 2013-02-14 Mavroeidis Georgios Watertight handhole for the transit of cables in outdoor areas

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2761282B1 (fr) * 1997-03-26 1999-04-30 Lorraine Laminage Plaque de lingotiere de machine de coulee continue des metaux, et lingotiere incluant de telles plaques
FR2787359B1 (fr) * 1998-12-18 2001-10-12 Aster Lingotiere pluriangulaire de coulee continue en charge d'un produit metallurgique
CN107470573B (zh) * 2017-08-08 2020-05-05 江苏亚太航空科技有限公司 油气润滑结晶器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2422464A1 (fr) * 1978-04-13 1979-11-09 Inst Elektroswarki Patona Lingotiere pour la refusion de metaux sous laitier electroconducteur
CH665575A5 (en) * 1985-06-10 1988-05-31 Jean Lathion One piece sidewall for casting moulds - with integral compressed air and oil supply systems
US4930566A (en) * 1988-09-24 1990-06-05 Showa Denko Kabushiki Kaisha Method for continuous casting of an aluminum-lithium alloy
FR2667002A1 (fr) * 1990-09-21 1992-03-27 Norsk Hydro As Procede et appareil pour la coulee de metaux reactifs dans un moule a partie superieure chaude.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2422464A1 (fr) * 1978-04-13 1979-11-09 Inst Elektroswarki Patona Lingotiere pour la refusion de metaux sous laitier electroconducteur
CH665575A5 (en) * 1985-06-10 1988-05-31 Jean Lathion One piece sidewall for casting moulds - with integral compressed air and oil supply systems
US4930566A (en) * 1988-09-24 1990-06-05 Showa Denko Kabushiki Kaisha Method for continuous casting of an aluminum-lithium alloy
FR2667002A1 (fr) * 1990-09-21 1992-03-27 Norsk Hydro As Procede et appareil pour la coulee de metaux reactifs dans un moule a partie superieure chaude.

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0743114A1 (de) * 1995-05-17 1996-11-20 UNIMETAL Société Française des Aciers Longs Verfahren zur Schmierung der Wände einer Stranggusskokille für Metalle und Kokille zur Durchführung dieses Verfahrens
FR2734186A1 (fr) * 1995-05-17 1996-11-22 Unimetall Sa Procede de lubrification des parois d'une lingotiere de coulee continue des metaux et lingotiere pour sa mise en oeuvre
WO1997037793A1 (fr) * 1996-04-05 1997-10-16 Ugine Savoie Lingotiere de coulee continue pour la coulee continue en charge verticale des metaux
FR2747059A1 (fr) * 1996-04-05 1997-10-10 Ugine Savoie Sa Procede de coulee continue des metaux et lingotiere pour sa mise en oeuvre
FR2747063A1 (fr) * 1996-04-05 1997-10-10 Ugine Savoie Sa Lingotiere de coulee continue en charge verticale des metaux
FR2747060A1 (fr) * 1996-04-05 1997-10-10 Ugine Savoie Sa Procede de coulee continue des metaux et installation de coulee pour sa mise en oeuvre
WO1997037795A1 (fr) * 1996-04-05 1997-10-16 Ugine Savoie Procede et installation de coulee continue des metaux
WO1997037794A1 (fr) * 1996-04-05 1997-10-16 Ugine Savoie Procede de coulee continue des metaux et lingotiere pour sa mise en oeuvre
WO1997037792A1 (fr) * 1996-04-05 1997-10-16 Ugine Savoie Lingotiere de coulee continue en charge verticale des metaux
FR2747062A1 (fr) * 1996-04-05 1997-10-10 Ugine Savoie Sa Lingotiere de coulee continue pour la coulee continue en charge verticale des metaux
KR100449675B1 (ko) * 1996-04-05 2005-01-15 아스꼬메탈 금속의연속주조방법및장치
CN1086613C (zh) * 1997-06-12 2002-06-26 洛林连续轧钢公司 用于细长截面金属产品的立式热顶连铸的铸型顶部
WO1998056521A1 (fr) * 1997-06-12 1998-12-17 Sollac Tete de lingotiere pour la coulee continue verticale en charge de produits metalliques a format allonge
FR2764533A1 (fr) * 1997-06-12 1998-12-18 Lorraine Laminage Tete de lingotiere pour la coulee continue verticale en charge de produits metalliques a format allonge
FR2765126A1 (fr) * 1997-06-26 1998-12-31 Lorraine Laminage Procede de coulee de metal liquide dans un conduit comprenant au moins deux pieces refractaires
US6311762B1 (en) * 1997-07-23 2001-11-06 Ascometal Method and device for continuous metal charge casting
WO1999004918A1 (fr) * 1997-07-23 1999-02-04 Ascometal Procede et dispositif pour la coulee continue en charge des metaux
FR2766394A1 (fr) * 1997-07-23 1999-01-29 Ascometal Sa Reglage de la tete d'une lingotiere de coulee continue en charge des metaux
EP1097762A1 (de) * 1999-11-05 2001-05-09 Usinor Grossflächige Vertikal-Stranggiesskokille mit Aufsatz zum Stranggiessen von Metallen
FR2800654A1 (fr) * 1999-11-05 2001-05-11 Lorraine Laminage Lingotiere a section large pour la coulee continue verticale en charge des metaux
KR100734793B1 (ko) * 1999-11-05 2007-07-03 아르셀러 프랑스 금속의 압탕 수직 연속 주조용 넓은 단면의 몰드
EP1120180A1 (de) * 2000-01-26 2001-08-01 DANIELI & C. OFFICINE MECCANICHE S.p.A. Verfahren und Vorrichtung zum Stranggiessen von Metall
US20110100582A1 (en) * 2008-06-30 2011-05-05 Nippon Light Metal Company, Ltd. Gas pressure controlled casting mold
US9561539B2 (en) * 2008-06-30 2017-02-07 Nippon Light Metal Company, Ltd. Gas pressure controlled casting mold
WO2013021221A2 (en) 2011-08-11 2013-02-14 Mavroeidis Georgios Watertight handhole for the transit of cables in outdoor areas

Also Published As

Publication number Publication date
FR2703609A3 (fr) 1994-10-14
DK0620062T3 (da) 1999-03-22
DE69410688T2 (de) 1999-02-25
FR2703609B3 (fr) 1995-02-10
ATE166812T1 (de) 1998-06-15
DE69410688D1 (de) 1998-07-09
ES2117238T3 (es) 1998-08-01
EP0620062B1 (de) 1998-06-03

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