EP0620062B1 - Procédé de coulée continue en charge des métaux et lingotière pour sa mise en oeuvre - Google Patents
Procédé de coulée continue en charge des métaux et lingotière pour sa mise en oeuvre Download PDFInfo
- 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
- Authority
- 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
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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
- B22D11/11—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.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Casting Devices For Molds (AREA)
- Manufacture And Refinement Of Metals (AREA)
Description
- la figure 1 représente schématiquement, en coupe longitudinale partielle, la partie haute d'une lingotière de coulée continue, conforme à une forme de réalisation de l'invention ;
- la figure 2 représente une autre forme de réalisation de l'invention.
Claims (11)
- Procédé de coulée continue des métaux en fusion, notamment de l'acier, dans une lingotière verticale ou courbe, comprenant un élément tubulaire métallique (1) énergiquement refroidi définissant un passage (3) pour le métal coulé (4), et destiné à initier à son contact la solidification (15) du métal coulé, selon lequel on dispose sur ledit élément (1) une rehausse thermiquement isolante (2) qui prolonge vers le haut ledit passage, constituée de matière réfractaire rigide pour être capable de contenir du métal en fusion coulé et sur laquelle sont susceptibles de se former des croûtes (14) de solidification parasites, caractérisé en ce que, au niveau de cette rehausse, ou au moins à sa base, on injecte un gaz débouchant en jets répartis annulairement à la surface de la rehausse (2) dans le passage (3) pour le métal coulé (4) de manière à obtenir un effet de cisaillage desdites croûtes (14) de solidification parasites.
- Procédé selon la revendication 1, caractérisé en ce qu'on utilise un gaz chimiquement inerte à l'égard du métal en fusion coulé.
- Procédé selon la revendication 1, caractérisé en ce qu'on injecte ledit gaz sous une pression de sortie à la surface de la rehausse supérieure d'au moins 20 % à la pression ferrostatique à l'endroit de la sortie.
- Procédé selon la revendication 1, caractérisé en ce qu'on injecte un lubrifiant dans ledit passage (3) à travers ledit élément tubulaire métallique (1).
- Lingotière verticale ou courbe pour la coulée continue des métaux en fusion, notamment de l'acier, comprenant :un élément tubulaire métallique (1) énergiquement refroidi définissant un passage (3) pour le produit coulé (4) et destiné à provoquer à son contact le début de la solidification (15) du métal coulé,une rehausse (2) en matériau réfractaire rigide à propriété thermoisolante implantée directement sur l'élément tubulaire (1) en le prolongeant vers le haut,
- Lingotière selon la revendication 5, caractérisée en ce que lesdits moyens d'injection comprennent une fente unique (8) ménagée à l'interface entre la rehausse (2) et l'élément métallique refroidi (1).
- Lingotière selon la revendication 5, caractérisée en ce que lesdits moyens d'injection comprennent des fentes étagées ménagées dans la rehausse (2).
- Lingotière selon les revendications 6 ou 7 caractérisée en ce que les fentes présentent une épaisseur de un à trois dixièmes de mm.
- Lingotière selon les revendications 6 ou 7, caractérisée en ce que lesdites fentes sont des fentes annulaires continues selon tout le pourtour de la rehausse.
- Lingotière selon la revendication 5, caractérisée en ce que la rehausse réfractaire thermoisolante (2) est constituée d'un mélange d'alumine et de silice à raison de 90 et 10 % en poids respectivement.
- Lingotière selon la revendication 5, caractérisée en ce que les moyens d'injection comprennent en outre un caisson (10), pourvu d'une conduite (11) d'arrivée de gaz sous pression, monté étanche (17) autour de la rehausse (2) et dont la surface extérieure (16) de la dite rehausse constitue une paroi du caisson pourvue de moyens (12,13,8,18) pour conduire le gaz depuis le caisson jusque dans l'espace de coulée (3).
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 (fr) | 1994-10-19 |
EP0620062B1 true EP0620062B1 (fr) | 1998-06-03 |
Family
ID=9445661
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94470007A Expired - Lifetime EP0620062B1 (fr) | 1993-03-30 | 1994-03-28 | Procédé de coulée continue en charge des métaux et lingotière pour sa mise en oeuvre |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0620062B1 (fr) |
AT (1) | ATE166812T1 (fr) |
DE (1) | DE69410688T2 (fr) |
DK (1) | DK0620062T3 (fr) |
ES (1) | ES2117238T3 (fr) |
FR (1) | FR2703609B3 (fr) |
Cited By (9)
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)
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 |
EP2292351B1 (fr) * | 2008-06-30 | 2021-05-12 | Nippon Light Metal, Co., Ltd. | Moule de coulée à commande de pression de gaz |
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)
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 |
-
1993
- 1993-03-30 FR FR9303871A patent/FR2703609B3/fr not_active Expired - Lifetime
-
1994
- 1994-03-28 AT AT94470007T patent/ATE166812T1/de active
- 1994-03-28 DE DE69410688T patent/DE69410688T2/de not_active Expired - Lifetime
- 1994-03-28 DK DK94470007T patent/DK0620062T3/da active
- 1994-03-28 EP EP94470007A patent/EP0620062B1/fr not_active Expired - Lifetime
- 1994-03-28 ES ES94470007T patent/ES2117238T3/es not_active Expired - Lifetime
Cited By (11)
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 |
FR2703609A3 (fr) | 1994-10-14 |
EP0620062A1 (fr) | 1994-10-19 |
DK0620062T3 (da) | 1999-03-22 |
DE69410688D1 (de) | 1998-07-09 |
ATE166812T1 (de) | 1998-06-15 |
DE69410688T2 (de) | 1999-02-25 |
FR2703609B3 (fr) | 1995-02-10 |
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