EP0620062B1 - 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
EP0620062B1
EP0620062B1 EP94470007A EP94470007A EP0620062B1 EP 0620062 B1 EP0620062 B1 EP 0620062B1 EP 94470007 A EP94470007 A EP 94470007A EP 94470007 A EP94470007 A EP 94470007A EP 0620062 B1 EP0620062 B1 EP 0620062B1
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EP
European Patent Office
Prior art keywords
gas
pouring bush
cast
metal
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.)
Expired - Lifetime
Application number
EP94470007A
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English (en)
French (fr)
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EP0620062A1 (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
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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 casting continues metals, especially steel according to the preamble of claim 1, which is based on FR-A-2667002.
  • the continuous casting operation consists schematically as we know, to pour a metal into fusion in an ingot mold, essentially constituted a bottomless tubular element defining a passage for cast metal, but whose walls, in copper or more generally made of copper alloy, are energetically cooled by circulation of water, and which also continuously extract a product already solidified externally over a few centimeters thick. Solidification then progresses towards the product axis and ends during the descent of this downstream of the mold in the so-called zone of "secondary cooling" due to ramps water sprinkler. The product obtained, bloom, billet or slab, is then cut to length, then laminated before shipping to customers or processing on square, in bars, wires, profiles, plates, sheets, etc ...
  • the volume of cast metal contained in the extension serves as a buffer volume within which the developing turbulences of flow inevitably under the effect of the incoming metal flow are amortized and therefore no longer have an effect on the copper element where solidification begins.
  • the subject of the present invention is first a continuous casting process under load molten metals, especially steel, in a ingot mold comprising a metallic tubular element, usually copper or copper alloy, energetically cooled, defining a passage for the molten metal and intended to initiate on contact the solidification of the cast metal, process by which has a material extension on said body rigid thermally insulating refractory that extends upward said passage, and in that at the level of this enhancement, or at least at its base, we inject a pressurized gas escaping into the passage for the metal cast as a distributed stream annularly, according to the periphery of the ingot mold.
  • the invention also relates to an ingot mold for continuous casting in charge of metals, in particular steel, comprising a metallic tubular element, usually copper or copper alloy, energetically cooled, defining a passage for the cast metal and intended to initiate contact with the solidification of the cast metal and a rise in rigid heat insulating refractory material implanted directly on the tubular element and extending it upward, ingot mold characterized in that means are provided to create in the passage for the metal cast at the level of the riser, and preferably at least at the level of the enhancer-element interface tubular, a gas jet distributed annularly according to the around the mold
  • the invention aims to obtain, thanks to the shearing effect produced by the gas jet on possible parasitic solidification in the refractory extension, a beginning of solidification at the level of the tubular element copper and only there, and therefore not to start the solidification process of the product already poured 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 V 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 provided at the metal element interface - enhances with a spacing 9 formed by a steel sheet of a few tenths of a thickness inserted between the body in copper 1 and the extension 2. This steel sheet is arranged at the periphery of the interface so as to close the slot 8 towards the outside of the mold and thus authorize its outgoing communication only casting space 3.
  • a sealed box 10 externally envelops the raises 2 and the upper part of the element copper 1 so that the outer surface 16 of the riser 2 constitutes a wall of the box.
  • This box receives by its supply line 11 argon under pressure from a source not shown and supplies in this gas the slot 8, thanks to pipes 12 hollowed out in the refractory mass and emerging from a side to the outer surface 16 of the extension and of which the other end is stuck on an annular chamber gas distribution 13 formed at the base of the extension at the end of the injection slot 8.
  • the pressure of the gas in the box to achieve successful injection can be up 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 Figure 2, consists of replacing the single-slot system at the riser-element interface in copper by a network of parallel slots 18 superimposed in strata according to the height of the riser 2 and crossing it right through.
  • the slots are more close together in the lower part of the block 2, in order to compensate for the pressure losses due at the higher ferrostatic pressure there. In this way, a sustained gas flow will be injected into the lower part of the extension 2, because this is where we can intervene one last time before starting desired solidification of the metal cast in contact of the cold wall of the copper element 1.
  • the height of the riser refractory 2 is of the order of 20-25 cm, its part containing the liquid metal being about ten cm at minimum, which largely takes into account 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 provided in the riser refractory can each be replaced by a plurality of radially distributed channels arranged close enough to each other to provide a homogeneous gas jet around the inside of the ingot mold.
  • slot For convenience, we will keep for refer to the general term "slot" as well.
  • the distribution chamber can be provided machined in the copper of the tubular element 1.
  • the channels 12 will be drilled in the copper element at place of being in the refractory mass of the enhances.
  • the invention applies to any cast product or flowable continuously, whatever its format (billets, blooms, slabs).
  • its implementation is not limited to pouring with submerged nozzle and slag from cover, but can very well be used in casting in free jet, preferably in this case the presence of an airtight flexible sleeve connecting the top of the riser at the bottom of the distributor placed above to prevent reoxidation of the molten metal.

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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)

Claims (11)

  1. Verfahren zum Strangguß schmelzflüssiger Metalle, insbesondere Stahl, in einer vertikalen oder gebogenen Kokille, die ein stark gekühltes röhrenförmiges Metallelement (1) umfaßt, das einen Durchgang (3) für das gegossene Metall (4) definiert und dazu bestimmt ist, bei seiner Berührung die Erstarrung (15) des gegossenen Metalls auszulösen, gemäß dem man auf dem Element (1) einen wärmedämmenden aufgebauten Einguß (2) anordnet, der diesen Durchgang nach oben hin verlängert und aus einem feuerfesten starren Material besteht, um gegossenes schmelzflüssiges Metall aufnehmen zu können, und an dem sich störende Erstarrungshäute (14) bilden können, dadurch gekennzeichnet, daß man in Höhe dieses aufgebauten Eingusses oder wenigstens an seiner Basis ein Gas einbläst, das in Strömen austritt, die in dem Durchgang (3) für das gegossene Metall (4) ringförmig an der Oberfläche des aufgebauten Eingusses (2) verteilt sind, um an diesen störenden Erstarrungshäuten (14) eine Schneidwirkung zu erzielen.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man ein Gas verwendet, das sich gegenüber dem gegossenen schmelzflüssigen Metall chemisch inert verhält.
  3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man das Gas mit einem Austrittsdruck an der Oberfläche des aufgebauten Eingusses einbläst, der um mindestens 20% größer ist als der ferrostatische Druck am Austrittsort.
  4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man durch das röhrenförmige Metallelement (1) ein Schmiermittel in den Durchgang (3) einspritzt.
  5. Vertikale oder gebogene Kokille für den Strangguß schmelzflüssiger Metalle, insbesondere Stahl, umfassend:
    ein stark gekühltes röhrenförmiges Metallelement (1), das einen Durchgang (3) für das Gußerzeugnis (4) definiert und dazu bestimmt ist, bei seiner Berührung den Beginn der Erstarrung (15) des gegossenen Metalls auszulösen,
    einen aufgebauten Einguß (2) aus einem feuerfesten, starren Material mit wärmedämmender Eigenschaft, der direkt auf dem röhrenförmigen Element (1) angebracht ist, wobei er dieses nach oben hin verlängert
       Kokille, dadurch gekennzeichnet, daß sie außerdem Mittel (8, 13, 12, 10) aufweist, um durch die Wand der Kokille ein Druckgas einzublasen, das in Strömen austritt, die in dem Durchgang (3) für das gegossene Metall ringförmig an der Oberfläche des aufgebauten Eingusses verteilt sind.
  6. Kokille nach Anspruch 5, dadurch gekennzeichnet, daß die Mittel zum Einblasen einen einzigen Schlitz (8) umfassen, der an der Grenzfläche zwischen dem aufgebauten Einguß (2) und dem gekühlten Metallelement (1) vorgesehen ist.
  7. Kokille nach Anspruch 5, dadurch gekennzeichnet, daß die Mittel zum Einblasen übereinander angeordnete Schlitze umfassen, die in dem aufgebauten Einguß (2) vorgesehen sind.
  8. Kokille nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß die Schlitze eine Dicke von ein bis drei zehntel mm aufweisen.
  9. Kokille nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß die Schlitze durchgehende ringförmige Schlitze entlang des Umfangs des aufgebauten Eingusses sind.
  10. Kokille nach Anspruch 5, dadurch gekennzeichnet, daß der wärmedämmende aufgebaute Einguß (2) aus einer Mischung aus Aluminium und Siliciumdioxid in einem Verhältnis von 90 zu 10 Gewichtsprozent besteht.
  11. Kokille nach Anspruch 5, dadurch gekennzeichnet, daß die Mittel zum Einblasen außerdem einen Behälter (10) umfassen, der mit einer Zuleitung (11) für Druckgas versehen ist und dicht (17) um den aufgebauten Einguß (2) montiert ist, wobei die Außenseite (16) des aufgebauten Eingusses eine Wand des Behälters bildet, die mit Mitteln (12, 13, 8, 18) versehen ist, um das Gas von dem Behälter bis in den Gießraum (3) zu leiten.
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
FR9303871A FR2703609B3 (fr) 1993-03-30 1993-03-30 Procédé de coulée continue en charge des métaux et lingotière pour sa mise en Óoeuvre.
FR9303871 1993-03-30

Publications (2)

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

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EP94470007A Expired - Lifetime EP0620062B1 (de) 1993-03-30 1994-03-28 Stranggiessverfahren mit Kokillen-Aufsatz und Kokille zur Anwendung

Country Status (6)

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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 (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5682942A (en) * 1995-05-17 1997-11-04 Unimetal Societe Francaise Des Aciers Longs Method of lubricating the walls of a mold for the continuous casting of metals and mold for its implementation
US6016940A (en) * 1997-06-26 2000-01-25 Sollac Process for casting molten metal in a conduit comprising at least two refractory parts
US6050324A (en) * 1996-04-05 2000-04-18 Societe Anonyme Des Forges Et Aciers De Dilling Continuous casting mold for the vertical casting of metals
FR2787359A1 (fr) * 1998-12-18 2000-06-23 Aster Lingotiere pluriangulaire de coulee continue en charge d'un produit metallurgique
US6102100A (en) * 1997-03-26 2000-08-15 Sollac Continuous casting mold for metals
US6109335A (en) * 1996-04-05 2000-08-29 Ugine Savoie Ingot mould for the continuous vertical casting of metals
US6260605B1 (en) 1996-04-05 2001-07-17 Ugine-Savoie Imphy Facility and method for the continuous casting of metals
US6318449B1 (en) 1997-06-12 2001-11-20 Sollac Mould head for the vertical hot-top continuous casting of metal products elongate cross section
US6419004B1 (en) 1999-11-05 2002-07-16 Usinor Mold or wide cross section for the hot-top vertical continuous casting of metals

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2747059B1 (fr) * 1996-04-05 1998-06-12 Ugine Savoie Sa Procede de coulee continue des metaux et lingotiere pour sa mise en oeuvre
FR2766394B1 (fr) 1997-07-23 1999-09-03 Ascometal Sa Reglage de la tete d'une lingotiere de coulee continue en charge des metaux
IT1316299B1 (it) * 2000-01-26 2003-04-10 Danieli Off Mecc Procedimento e dispositivo per migliorare la qualita' di corpimetallici colati in continuo
CN102076443B (zh) * 2008-06-30 2013-11-06 日本轻金属株式会社 气体压控制式铸造用铸型
GR1007933B (el) 2011-08-11 2013-07-04 Γεωργιος Αλεξανδρου Μαυροειδης Στεγανο φρεατιο εξωτερικου χωρου για τη διελευση καλωδιων
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

Family Cites Families (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
JP2707288B2 (ja) * 1988-09-24 1998-01-28 昭和電工株式会社 アルミニウム−リチウム系合金の連続鋳造方法
NO171303C (no) * 1990-09-21 1993-02-24 Norsk Hydro As Fremgangsmaate og anordning for hot-top stoeping av reaktive metaller

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5682942A (en) * 1995-05-17 1997-11-04 Unimetal Societe Francaise Des Aciers Longs Method of lubricating the walls of a mold for the continuous casting of metals and mold for its implementation
US6050324A (en) * 1996-04-05 2000-04-18 Societe Anonyme Des Forges Et Aciers De Dilling Continuous casting mold for the vertical casting of metals
US6109335A (en) * 1996-04-05 2000-08-29 Ugine Savoie Ingot mould for the continuous vertical casting of metals
US6260605B1 (en) 1996-04-05 2001-07-17 Ugine-Savoie Imphy Facility and method for the continuous casting of metals
US6102100A (en) * 1997-03-26 2000-08-15 Sollac Continuous casting mold for metals
US6318449B1 (en) 1997-06-12 2001-11-20 Sollac Mould head for the vertical hot-top continuous casting of metal products elongate cross section
US6016940A (en) * 1997-06-26 2000-01-25 Sollac Process for casting molten metal in a conduit comprising at least two refractory parts
FR2787359A1 (fr) * 1998-12-18 2000-06-23 Aster Lingotiere pluriangulaire de coulee continue en charge d'un produit metallurgique
WO2000037197A1 (fr) * 1998-12-18 2000-06-29 Usinor Lingotiere pluriangulaire de coulee continue en charge d'un produit metallurgique
US6354363B1 (en) 1998-12-18 2002-03-12 Usinor Ingot mould with multiple angles for loaded continuous casting of metallurgical product
US6419004B1 (en) 1999-11-05 2002-07-16 Usinor Mold or wide cross section for the hot-top vertical continuous casting of metals

Also Published As

Publication number Publication date
ES2117238T3 (es) 1998-08-01
ATE166812T1 (de) 1998-06-15
FR2703609B3 (fr) 1995-02-10
DE69410688T2 (de) 1999-02-25
EP0620062A1 (de) 1994-10-19
FR2703609A3 (fr) 1994-10-14
DE69410688D1 (de) 1998-07-09
DK0620062T3 (da) 1999-03-22

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