WO2000050190A1 - Support d'impact pour panier de coulee - Google Patents

Support d'impact pour panier de coulee Download PDF

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Publication number
WO2000050190A1
WO2000050190A1 PCT/GB2000/000518 GB0000518W WO0050190A1 WO 2000050190 A1 WO2000050190 A1 WO 2000050190A1 GB 0000518 W GB0000518 W GB 0000518W WO 0050190 A1 WO0050190 A1 WO 0050190A1
Authority
WO
WIPO (PCT)
Prior art keywords
tundish
sidewall
impact pad
impact
gas
Prior art date
Application number
PCT/GB2000/000518
Other languages
English (en)
Inventor
Michael Robert Clark
Original Assignee
Foseco International Limited
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 Foseco International Limited filed Critical Foseco International Limited
Priority to CA002363120A priority Critical patent/CA2363120A1/fr
Priority to EP00903838A priority patent/EP1154871A1/fr
Priority to KR1020017010077A priority patent/KR20010102015A/ko
Priority to PL00349362A priority patent/PL349362A1/xx
Priority to SK1201-2001A priority patent/SK12012001A3/sk
Priority to BR0008398-4A priority patent/BR0008398A/pt
Priority to AU25595/00A priority patent/AU2559500A/en
Publication of WO2000050190A1 publication Critical patent/WO2000050190A1/fr
Priority to US09/917,797 priority patent/US20020011696A1/en
Priority to BG105834A priority patent/BG105834A/xx

Links

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/003—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with impact pads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B22D1/002—Treatment with gases
    • B22D1/005—Injection assemblies therefor

Definitions

  • This invention relates to the handling of molten metal, especially steel.
  • the invention relates to a tundish impact pad, i.e. an article formed from refractory material to be placed on the floor of a tundish to receive an incoming stream of molten metal poured into the tundish from a ladle.
  • the invention has particular utility in the continuous casting of steel.
  • WO 96/14951 discloses a tundish impact pad comprising a body of refractory material capable of withstanding contact with molten steel in a tundish.
  • the impact pad body comprises a base having an impact surface, an outer sidewall extending upwardly from the impact surface, and a top surface connected to the sidewall and defining an opening therein.
  • the top surface has an inner annular portion substantially parallel to the impact surface, and there is a substantially right angled corner between the sidewall and the impact surface, and also between the sidewall and the inner annular portion of the top surface.
  • United States Patent No. 4,468,012 discloses a device for removing inclusions from a molten metal which is poured into a casting tundish.
  • the device comprises long blocks of heat-insulating material which is sinterable at the temperature of the molten metal and which comprises inorganic particles incorporated in an organic binder which is decomposable at the temperature of the molten metal so as to form pores in the heat-insulating material.
  • a duct extends through each long block, for the supply of an inert gas which diffuses into the molten metal through the pores in the heat-insulating material.
  • United States Patent No. 5,054,749 discloses a tundish for the continuous casting of steel, comprising a permanent refractory cast on a sheet metal frame defining an external wall of the tundish.
  • a gas distribution chamber In the bottom of the tundish there is a gas distribution chamber and a porous refractory wear plate surmounting and extending over the chamber.
  • a gas inlet duct extends from an upper edge of the tundish and down through the permanent refractory to the gas distribution chamber.
  • United Kingdom Patent Application No. 2164281A discloses a tundish used in a steel making process, which includes a replaceable refractory lining disposed on the inner surface of the bottom and side walls of the tundish.
  • a porous refractory tile is supported upon the upper surface of the refractory lining and has a major axis extending substantially the entire width of the tundish.
  • the porous tile encapsulates a perforated conduit for supplying inert gas which is allowed to emanate from the tile across the width of the tundish, to remove unwanted inclusions from the steel.
  • the tile has a ramp-like surface for deflecting steel flowing towards it upwardly in the tundish.
  • the tundish also includes an impact pad upstream of the tile.
  • the present invention provides a tundish impact pad formed from refractory material, the impact pad comprising a base having an impact surface which in use faces upwardly to receive molten metal poured onto the impact pad, and a sidewall extending upwardly from at least part of the periphery of the impact surface, characterised in that at least part of the interior, and a surface, of the sidewall are porous, and the impact pad includes means for supplying a gas to the porous interior of the sidewall, to enable the gas to be supplied to the molten metal from the porous surface of the sidewall.
  • the invention provides a kit of parts for assembly to form a tundish impact pad, comprising:
  • a peripheral sidewall part formed from refractory material, for attachment directly or indirectly to the base part to form at least part of a sidewall around at least part of the periphery of the impact surface; characterised in that at least part of the interior, and a surface, of the sidewall part are porous, and the base part and/or the sidewall part include(s) means for supplying a gas to the porous interior of the sidewall part, to enable gas to be supplied to the molten metal from the porous surface of the sidewall part.
  • the invention provides a tundish for containing molten metal, the tundish comprising a floor and sidewalls formed from refractory material, and further comprising an outlet for the molten metal, characterised in that the tundish contains an impact pad according to the first aspect of the invention or assembled from a kit of parts according to the second aspect of the invention, placed on the floor of the tundish.
  • the gas is preferably an inert gas, e.g. argon or nitrogen, and is preferably supplied to the molten metal for the purpose of removing unwanted inclusions from the metal.
  • an inert gas e.g. argon or nitrogen
  • the invention provides a method of removing inclusions from molten metal in a tundish, by means of tundish impact pad according to the first aspect of the invention or assembled from a kit of parts according to the second aspect of the invention, the method comprising supplying a gas to the molten metal from the porous sidewall of the impact pad.
  • pores, channels or other apertures in the sidewall may generally have any shape, for example they may be generally round, or elongate, in cross-section, thus appearing in the form of round holes or slits, respectively, on the surface of the sidewall.
  • the porosity of the sidewall may be in the form of an irregular network of pores, or it may be in the form of a substantially regular structure of channels, for example.
  • the invention has the advantage that because the gas is supplied to the molten metal in the tundish from the sidewall of the impact pad, it may provide a kind of "curtain" of gas bubbles surrounding the impact surface of the pad (or at least part of the impact surface). This means that molten metal poured into, and subsequently flowing out of, the impact pad will normally flow through the gas curtain, and furthermore the gas will come into contact with the molten metal very soon after the metal has been poured into the tundish. The gas therefore has substantially the longest possible contact time with the molten metal, and will generally be carried with the metal as it flows away from the impact pad. This generally leads to a more efficient incorporation of the gas into the metal, and therefore a more efficient removal of unwanted inclusions, for example.
  • the sidewall of the impact pad is porous at least in an upper portion thereof. Preferably, at least part of an upper surface of the sidewall is porous.
  • the sidewall may include an inwardly projecting ledge, which is preferably located substantially at the top of the sidewall (but which may, alternatively, project from the side of the sidewall).
  • inwardly projecting is meant projecting over at least part of the impact surface of the impact pad.
  • At least a central region of the impact surface is preferably substantially planar, and substantially horizontal in use.
  • the ledge is preferably substantially parallel to the planar region of the impact surface.
  • At least part of the porosity of the sidewall may advantageously comprise at least part of the ledge, and preferably at least an upper surface thereof.
  • substantially the entire upper surface of the sidewall, including the upper surface of an inwardly projecting ledge may be porous.
  • the inwardly projecting ledge may, for example, comprise an upper portion which is porous and a lower portion which is substantially non-porous.
  • the ledge may comprise upper and lower porous portions and a substantially non-porous intermediate portion.
  • At least part of the porosity of the sidewall may be provided by a portion of the sidewall located between the base and an upper portion of the sidewall (e.g. a ledge) - i.e. the main body of the sidewall may provide at least part of the porosity of the sidewall.
  • At least part of the inner and/or outer surface(s) of the sidewall may be porous, and therefore supply gas to the molten metal in use.
  • the second aspect of the invention is a kit of parts for assembly to form a tundish impact pad.
  • the sidewall includes an inwardly projecting ledge.
  • the inwardly projecting ledge may comprise an integral part of the sidewall part, or it may comprise a further separate part, i.e. a further sidewall part of the kit.
  • the means for supplying a gas to the interior of the sidewall preferably comprises one or more conduits.
  • the term “conduit” is intended to include “pipe”, “channel”, “duct” and the like.
  • the or each conduit is preferably perforated along at least part of its length, in order to release the gas.
  • the gas is therefore preferably supplied to substantially the entire porous region or regions of the sidewall (or the entire sidewall for embodiments in which the entire sidewall is porous).
  • the impact pad therefore preferably includes one or more conduits (e.g. a network of conduits) for supplying the gas to the porous sidewall.
  • the sidewall preferably includes at least one gas supply conduit extending through the entire length thereof (e.g. an endless conduit).
  • the tundish preferably includes one or more gas supply conduits for supplying the gas to the impact pad.
  • at least one conduit in the tundish is preferably connected to a respective conduit in the impact pad.
  • the connection between a tundish gas supply conduit and an impact pad conduit may, for example, be made at the base of the impact pad, or at the sidewall of the impact pad, depending upon the design of the tundish and the arrangement of the impact pad within the tundish.
  • the conduit connection may conveniently be made at the impact pad sidewall for example, whereas for arrangements in which the impact pad is located a distance from the sides of the tundish, it may be more convenient for the conduit connection to be made at the base of the impact pad.
  • the conduit connection may be underneath the base of the impact pad, but it is generally preferred for the connection to be made at a side of the base of the impact pad, the tundish conduit for example lying on the floor of the tundish and provided in a refractory block or under a refractory cover.
  • the tundish conduit(s) is/are preferably connected to a gas source located to the exterior of the tundish.
  • Figure 1 is a schematic illustration in cross section of a one-piece impact pad according to the invention
  • Figure 2 is a schematic illustration in cross section of a two-piece impact pad according to the invention
  • Figure 3 is a schematic illustration in cross section of a three piece impact pad according to the invention.
  • Figure 4 is a schematic illustration in cross section of a tundish containing an impact pad according to the invention.
  • Figure 1 shows in cross-section a one-piece tundish impact pad 1 formed from concrete.
  • the impact pad comprises a base 3 having an upwardly facing impact surface 5 for receiving molten metal poured onto the impact pad, and a sidewall 7 extending upwardly from the periphery of the impact surface.
  • the impact pad is generally square or rectangular in plan view (but other shapes are of course possible, e.g. other quadrilateral shapes, or round, e.g. circular).
  • An upper portion 9 of the sidewall 7 is formed from a porous concrete material.
  • a gas supply conduit (not shown) in the impact pad supplies a gas to the interior of the porous portion 9, and the gas permeates through the porous portion and is released as a "curtain" of gas bubbles emanating from the upper surface of the sidewall of the impact pad.
  • the sidewall includes an inwardly projecting ledge 11 , and part of the porous upper portion 9 of the sidewall comprises an upper part of this ledge.
  • Figure 2 shows an impact pad similar to that shown in Figure 1 , with a porous upper portion 9, but this impact pad has been assembled from a kit of two main parts, namely a base part 13 comprising a base 3 and a lower region of sidewall 7, and a sidewall part 15 which constitutes an upper region of the sidewall, comprising the porous upper portion 9 and a non-porous portion 16.
  • the two parts of the kit have been assembled and cemented together to form the impact pad.
  • Figure 3 shows an impact pad similar to those shown in figures 1 and 2, except that this impact pad has been assembled from a kit of three main parts, and it contains an additional porous portion in the sidewall.
  • the kit comprised a base part 17, a lower sidewall part 19, and an upper sidewall part 15 (which is the same as that of Figure 2), the parts having been assembled and cemented together to form the complete impact pad.
  • the lower sidewall part 19 comprises a porous portion 23, and the upper sidewall portion comprises an upper porous portion 9 and a lower non-porous portion 16.
  • the lower porous portion 23 releases the gas from its exterior and interior surfaces, i.e. the gas is released both into the interior of the tundish and to the exterior of the tundish.
  • FIG. 4 shows, schematically and in cross-section, a tundish 25 filled with molten steel 27 and containing an impact pad 1 according to the invention.
  • the flow direction of the molten steel from a submerged entry shroud 29 onto the impact surface 5 of the impact pad, through bubbles of gas supplied by the impact pad and towards and through outlets 31 is indicated by the arrows.
  • the gas supply conduits are not shown.

Abstract

L'invention concerne un support d'impact pour panier de coulée, constitué d'un matériau réfractaire, comprenant une base ayant une surface d'impact qui, en service, est orientée vers le haut pour recevoir le métal fondu, acier par exemple, déversé sur ledit support, et une paroi latérale s'étendant vers le haut à partir d'au moins une partie de la périphérie de la surface d'impact. Au moins une partie de l'intérieur, et une surface, de la paroi latérale, sont poreuses, et le support d'impact comprend des moyens d'alimentation d'un gaz, argon par exemple, vers l'intérieur poreux de la paroi latérale, afin que le gaz soit envoyé dans le métal fondu à partir de la surface poreuse de la paroi latérale. Le support d'impact peut être utilisé durant la coulée continue de l'acier.
PCT/GB2000/000518 1999-02-22 2000-02-17 Support d'impact pour panier de coulee WO2000050190A1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
CA002363120A CA2363120A1 (fr) 1999-02-22 2000-02-17 Support d'impact pour panier de coulee
EP00903838A EP1154871A1 (fr) 1999-02-22 2000-02-17 Support d'impact pour panier de coulee
KR1020017010077A KR20010102015A (ko) 1999-02-22 2000-02-17 턴디쉬 임팩트 패드
PL00349362A PL349362A1 (en) 1999-02-22 2000-02-17 Tundish impact pad
SK1201-2001A SK12012001A3 (sk) 1999-02-22 2000-02-17 Nárazová podložka odlievacej panvy
BR0008398-4A BR0008398A (pt) 1999-02-22 2000-02-17 Amortecedor de impacto para distribuidor, distribuidor para conter metal em fusão, conjunto de partes para montagem para formar um amortecedor de impacto para distribuidor e processo de remover inclusões de metal em fusão em um distribuidor
AU25595/00A AU2559500A (en) 1999-02-22 2000-02-17 Tundish impact pad
US09/917,797 US20020011696A1 (en) 1999-02-22 2001-07-31 Tundish impact pad
BG105834A BG105834A (en) 1999-02-22 2001-08-22 Tundish impact pad for molten metal

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9903937.2A GB9903937D0 (en) 1999-02-22 1999-02-22 Tundish impact pad
GB9903937.2 1999-02-22

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US09/917,797 Continuation US20020011696A1 (en) 1999-02-22 2001-07-31 Tundish impact pad

Publications (1)

Publication Number Publication Date
WO2000050190A1 true WO2000050190A1 (fr) 2000-08-31

Family

ID=10848189

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2000/000518 WO2000050190A1 (fr) 1999-02-22 2000-02-17 Support d'impact pour panier de coulee

Country Status (16)

Country Link
US (1) US20020011696A1 (fr)
EP (1) EP1154871A1 (fr)
KR (1) KR20010102015A (fr)
CN (1) CN1341047A (fr)
AR (1) AR022638A1 (fr)
AU (1) AU2559500A (fr)
BG (1) BG105834A (fr)
BR (1) BR0008398A (fr)
CA (1) CA2363120A1 (fr)
CZ (1) CZ20013032A3 (fr)
GB (1) GB9903937D0 (fr)
HU (1) HUP0200132A2 (fr)
PL (1) PL349362A1 (fr)
SK (1) SK12012001A3 (fr)
TR (1) TR200102438T2 (fr)
WO (1) WO2000050190A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013190799A1 (fr) * 2012-06-18 2013-12-27 Ｊｆｅスチール株式会社 Procédé de fabrication d'un acier moulé de grande pureté et panier de coulée
WO2018024495A1 (fr) 2016-08-02 2018-02-08 Thyssenkrupp Steel Europe Ag Pot anti-érosion, système de coulée de métal en fusion et procédé de coulée de métal en fusion

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100530102B1 (ko) * 2001-11-24 2005-11-22 주식회사 포스코 연속주조 턴디쉬의 용강 분배판
ZA200206261B (en) * 2002-03-28 2003-04-07 Foseco Int Metallurgical impact pad.
DE10235867B3 (de) * 2002-08-05 2004-04-08 Refractory Intellectual Property Gmbh & Co.Kg Feuerfestes keramisches Bauteil
ITMI20031356A1 (it) * 2003-07-02 2005-01-03 Danieli Off Mecc Dispositivo di alimentazione di metallo fuso in cristallizzatore.
US7865851B2 (en) * 2006-03-06 2011-01-04 Mentor Graphics Corporation Capacitance extraction of intergrated circuits with floating fill
US8066935B2 (en) 2007-12-14 2011-11-29 The Harrison Steel Castings Company Turbulence inhibiting impact well for submerged shroud or sprue poured castings
CN102398024A (zh) * 2010-09-17 2012-04-04 维苏威高级陶瓷(苏州)有限公司 具有增强的冲击表面的冲击箱
PL2865464T3 (pl) * 2013-10-22 2016-08-31 Refractory Intellectual Property Gmbh & Co Kg Ognioodporna ceramiczna wkładka podstrumieniowa
CN107949446B (zh) * 2015-08-17 2020-03-17 日铁日新制钢株式会社 环形堰
SK892016A3 (sk) * 2016-10-10 2018-07-02 I.P.C. Refractories, Spol. S R.O. Spôsob liatia roztaveného kovu s využitím dopadovej dosky v medzipanve

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4468012A (en) * 1981-11-13 1984-08-28 Daussan Et Compagnie Device for the removal of inclusions contained in molten metals
GB2147837A (en) * 1983-10-06 1985-05-22 Rand Steel Tech Gas distributing tundish barrier
GB2164281A (en) * 1984-09-18 1986-03-19 Dresser Ind Tundish with gas injection tile
US5054749A (en) * 1989-06-16 1991-10-08 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Tundish for continuous casting of steel
EP0558018A1 (fr) * 1992-02-26 1993-09-01 Veitsch-Radex Aktiengesellschaft Für Feuerfeste Erzeugnisse Elément céramique réfractaire préfabriqué pour le montage dans un récipient intermédiaire
EP0576212A2 (fr) * 1992-06-18 1993-12-29 Foseco International Limited Purification de métal fondu
WO1996014951A1 (fr) * 1994-11-09 1996-05-23 Foseco International Limited Dalle d'impact pour panier de coulee

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4468012A (en) * 1981-11-13 1984-08-28 Daussan Et Compagnie Device for the removal of inclusions contained in molten metals
GB2147837A (en) * 1983-10-06 1985-05-22 Rand Steel Tech Gas distributing tundish barrier
GB2164281A (en) * 1984-09-18 1986-03-19 Dresser Ind Tundish with gas injection tile
US5054749A (en) * 1989-06-16 1991-10-08 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Tundish for continuous casting of steel
EP0558018A1 (fr) * 1992-02-26 1993-09-01 Veitsch-Radex Aktiengesellschaft Für Feuerfeste Erzeugnisse Elément céramique réfractaire préfabriqué pour le montage dans un récipient intermédiaire
EP0576212A2 (fr) * 1992-06-18 1993-12-29 Foseco International Limited Purification de métal fondu
WO1996014951A1 (fr) * 1994-11-09 1996-05-23 Foseco International Limited Dalle d'impact pour panier de coulee

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013190799A1 (fr) * 2012-06-18 2013-12-27 Ｊｆｅスチール株式会社 Procédé de fabrication d'un acier moulé de grande pureté et panier de coulée
WO2018024495A1 (fr) 2016-08-02 2018-02-08 Thyssenkrupp Steel Europe Ag Pot anti-érosion, système de coulée de métal en fusion et procédé de coulée de métal en fusion
DE102016214236A1 (de) 2016-08-02 2018-02-08 Thyssenkrupp Ag Pralltopf, Vorrichtung zum Vergießen einer metallischen Schmelze sowie Verfahren zum Vergießen einer metallischen Schmelze

Also Published As

Publication number Publication date
BG105834A (en) 2002-04-30
AU2559500A (en) 2000-09-14
CA2363120A1 (fr) 2000-08-31
SK12012001A3 (sk) 2002-03-05
BR0008398A (pt) 2002-01-29
CN1341047A (zh) 2002-03-20
EP1154871A1 (fr) 2001-11-21
US20020011696A1 (en) 2002-01-31
AR022638A1 (es) 2002-09-04
HUP0200132A2 (en) 2002-05-29
PL349362A1 (en) 2002-07-15
CZ20013032A3 (cs) 2002-05-15
GB9903937D0 (en) 1999-04-14
TR200102438T2 (tr) 2002-01-21
KR20010102015A (ko) 2001-11-15

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