EP0094926B1 - Orifice d'injection d'un gaz de protection dans un tube de coulée - Google Patents

Orifice d'injection d'un gaz de protection dans un tube de coulée Download PDF

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Publication number
EP0094926B1
EP0094926B1 EP83870047A EP83870047A EP0094926B1 EP 0094926 B1 EP0094926 B1 EP 0094926B1 EP 83870047 A EP83870047 A EP 83870047A EP 83870047 A EP83870047 A EP 83870047A EP 0094926 B1 EP0094926 B1 EP 0094926B1
Authority
EP
European Patent Office
Prior art keywords
casting tube
injection
casting
pouring tube
tube
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
Application number
EP83870047A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0094926A1 (fr
Inventor
Tom P. Hamilton
Roberto Grosso
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.)
Vesuvius International Corp
Original Assignee
Vesuvius International Corp
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 Vesuvius International Corp filed Critical Vesuvius International Corp
Publication of EP0094926A1 publication Critical patent/EP0094926A1/fr
Application granted granted Critical
Publication of EP0094926B1 publication Critical patent/EP0094926B1/fr
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/072—Treatment with gases
    • 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
    • B22D41/50—Pouring-nozzles
    • B22D41/58—Pouring-nozzles with gas injecting means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/14—Charging or discharging liquid or molten material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge

Definitions

  • the present invention relates to a pouring tube of refractory material provided with a collar intended to apply it against a bottom plate of a discharge orifice of a ladle, so as to provide, at its upper part, orifices for injection of a shielding gas connected together by an annular channel connected to a source of shielding gas. It relates to a pouring tube provided with injection orifices having a particular arrangement and shape, in order to ensure, in a more secure manner, the protection of the molten metal against oxidation and allow the walls of the tube to cool. casting.
  • the present invention finds wide application in the continuous casting of steel, during which the latter is discharged from a ladle to a degassing enclosure or to a basket, and from the latter to a mold or to an ingot mold.
  • the duration of the casting operation and the large contact surface that the metal presents to the air make the implementation of means inevitable creating a protective atmosphere protecting all the free surfaces of the metal from oxidation.
  • British patent 2,013,856 discloses a method and an apparatus for controlling and regulating, in particular in continuous casting, the discharge rate of a container provided with a sliding closure device and a pouring tube.
  • the upper part of the pouring tube is embedded in a recess provided in the lower face of a fixed lower plate of said sliding closure device.
  • the recess is lined with a metal ring and is connected to an annular channel through which an inert or reducing gas is injected.
  • This metal ring is intended to form a baffle in order to prevent the infiltration of steel into the annular channel while allowing the passage of gas.
  • the object of the present invention is to avoid the drawbacks mentioned above. It relates to a pouring tube of refractory material according to the preamble of claim 1 characterized in that the injection orifices with which it is provided, are injection grooves formed along certain generatrices of an upper part of tapered shape, provided on the inner surface of the pouring tube, on which the assembly collar is fixed.
  • the aforementioned directional grooves are regularly distributed along the aforesaid frustoconical part.
  • the source of shielding gas is a source of inert gas, in particular argon.
  • the gas injection device according to the invention is mounted on the bottom of a ladle, designated as a whole by the reference notation 1 and intended to treat a bath of molten metal.
  • a bottom plate 2 surrounds a discharge orifice 3 of the ladle 1 provided with a closure device 4.
  • the closure device 4 consists of a movable anchor plate 5 made of refractory material, possibly consisting of several elements 6 each having an orifice 7 on which is fixed a pouring tube 8 having a cylindrical flow channel 9 of determined diameter.
  • the upper part of the pouring tube 8 is flared. It carries a fixing collar 10 intended to apply the pouring tube 8 against the bottom plate 2 provided with the orifice 3 for discharging a ladle.
  • the flared part in fact determines a truncated cone, located in the extension of the channel of the pouring tube 8.
  • grooves 11 are provided for injection. These grooves 11 are connected to each other at their upper part by an annular channel 12, possibly embedded in the mass of the fixing collar 10 of the tube 8.
  • a radial duct 13 connects the annular channel 12 to the support ring 14 at the source protective gas 15, possibly by means of oscillating arms 16.
  • the flared part of the pouring tube 8 is arranged below a constriction 17 of the discharge orifice 3 of the ladle 1.
  • the fixing collar 10 of the pouring tube 8 shown in FIG. 1, surrounds the upper edge of the flared part of said pouring tube 8.
  • the circular channel is formed by the annular wall of the fixing collar 10 and the base of a cylindrical or frustoconical part 18 which fits into the pouring tube by forming a constriction 17 in the pouring channel.
  • This constriction 17 which, during the casting operation, acts like a Venturi tube, creates a depression.
  • This depression has the effect of sucking in the pouring tube 8, during the casting operation through the injection grooves provided in the pouring tube 8, a gas or mixture of protective gases and distributing it. along the walls of the pouring tube 8 in order to protect the free surfaces of the metal from oxidation.
  • the presence of air in the pouring tube causes a reduction in the quality of the casting metal due to the formation of exogenous blowing caused by the air driven mechanically during the casting.
  • the oxidized metal tends to stick in the pouring tube 8 and to give a film of oxides which, in the case of an ingot mold, can be the cause of skin defects.
  • the present invention allows above all to keep the injection grooves free even in case of interruption of the casting operation.
  • the injection of a protective gas also makes it possible to cool the internal wall of the pouring tube 8 made of refractory material.
  • This tube 8 is subjected to considerable thermal and chemical attack. Among other things, it is subject to significant erosion.
  • the injection of shielding gas can reduce or partially avoid this erosion.
  • the pouring tube 8 must therefore be replaced less often. It is moreover with a view to frequent replacement of this pouring tube that a support fork is provided to hold it in place.
  • the fixing collar (10) surrounds the entire frustoconical part of the pouring tube so as to form a more solid assembly.
  • This second embodiment gives sufficient solidity even if the annular channel 12 is embedded in the mass of the fixing collar 10.
  • Nitrogen is not suitable as a shielding gas because it causes the formation of nitrides. Generally, argon is used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Continuous Casting (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
EP83870047A 1982-05-13 1983-05-11 Orifice d'injection d'un gaz de protection dans un tube de coulée Expired EP0094926B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE208080 1982-05-13
BE0/208080A BE893168A (fr) 1982-05-13 1982-05-13 Orifice d'injection d'un gaz de protection dans un tube de coulee

Publications (2)

Publication Number Publication Date
EP0094926A1 EP0094926A1 (fr) 1983-11-23
EP0094926B1 true EP0094926B1 (fr) 1986-02-26

Family

ID=3843530

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83870047A Expired EP0094926B1 (fr) 1982-05-13 1983-05-11 Orifice d'injection d'un gaz de protection dans un tube de coulée

Country Status (5)

Country Link
US (1) US4519438A (enrdf_load_stackoverflow)
EP (1) EP0094926B1 (enrdf_load_stackoverflow)
JP (1) JPS58209453A (enrdf_load_stackoverflow)
BE (1) BE893168A (enrdf_load_stackoverflow)
DE (1) DE3362258D1 (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3634893C1 (en) * 1986-10-14 1988-03-31 Didier Werke Ag Casting-pipe arrangement, particularly for launders in continuous casting installations
RU2200645C2 (ru) * 2001-06-08 2003-03-20 Открытое акционерное общество "Новолипецкий металлургический комбинат" Устройство для непрерывной разливки стали

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3342071C2 (de) * 1983-11-22 1986-08-07 Didier-Werke Ag, 6200 Wiesbaden Vorrichtung zum Abschirmen eines metallischen Gießstrahls
GB8521536D0 (en) * 1985-08-29 1985-10-02 British Steel Corp Molten metal teeming practice
EP0240482B1 (fr) * 1986-04-02 1990-09-19 CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif Dispositif pour la coulée de l'acier
DE3624320A1 (de) * 1986-07-18 1988-01-28 Dahlhoff Friedrich Wilhelm Abdichtung fuer giesseinrichtungen mittels schutzgaszufuehrung
US4836508A (en) * 1988-05-03 1989-06-06 Vesuvius Crucible Company Ladle shroud with co-pressed gas permeable ring
IT1226006B (it) * 1988-12-14 1990-12-10 Sirma Nuova Perfezionamento nei processi e nei dispositivi di colata continua di metalli
US5067552A (en) * 1989-07-26 1991-11-26 Ltv Steel Company, Inc. Shrouding for top pouring of ingots
FR2694221B1 (fr) * 1992-07-29 1994-10-21 Lorraine Laminage Busette interne en matériau réfractaire pour récipients métallurgiques.
US5404929A (en) * 1993-05-18 1995-04-11 Liquid Air Corporation Casting of high oxygen-affinity metals and their alloys
CA2119963A1 (en) * 1994-03-25 1995-09-26 Christopher J. Beveridge Smelt spout for a recovery furnace
DE10009790C1 (de) * 2000-03-01 2001-09-20 Degussa Verfahren zur Herstellung von Organosilylalkylpolysulfanen
RU2260498C1 (ru) * 2004-08-09 2005-09-20 ОАО Челябинский металлургический комбинат Быстроразъемное соединение для подвода инертного газа к сталеразливочному ковшу
US20080184848A1 (en) * 2006-08-23 2008-08-07 La Sorda Terence D Vapor-Reinforced Expanding Volume of Gas to Minimize the Contamination of Products Treated in a Melting Furnace
US20090064821A1 (en) * 2006-08-23 2009-03-12 Air Liquide Industrial U.S. Lp Vapor-Reinforced Expanding Volume of Gas to Minimize the Contamination of Products Treated in a Melting Furnace
US8403187B2 (en) * 2006-09-27 2013-03-26 Air Liquide Industrial U.S. Lp Production of an inert blanket in a furnace
RU2391179C2 (ru) * 2008-09-03 2010-06-10 Открытое акционерное общество "Северский трубный завод" Способ защиты струи металла при разливке
JP5505969B2 (ja) * 2010-03-15 2014-05-28 黒崎播磨株式会社 ロングノズル
JP5459851B2 (ja) * 2010-03-31 2014-04-02 黒崎播磨株式会社 ロングノズル
CN103350222A (zh) * 2013-07-12 2013-10-16 抚顺特殊钢股份有限公司 新型模铸氩气保护装置
CN106141159A (zh) * 2015-04-13 2016-11-23 天工爱和特钢有限公司 一种高速钢模具炼钢浇注用的氩气保护罩

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1404505A (fr) * 1964-04-29 1965-07-02 Air Liquide Procédé et installation de dégazage sous vide pour la coulée continue de l'acier
US3558256A (en) * 1964-10-21 1971-01-26 Paderwerk Gebruder Benteler Apparatus for the continuous casting of metals
JPS5213293Y2 (enrdf_load_stackoverflow) * 1971-10-12 1977-03-25
US3908734A (en) * 1973-03-05 1975-09-30 Jones & Laughlin Steel Corp Method and apparatus for gas shrouding of liquids
DE2557726C3 (de) * 1975-12-20 1980-09-11 Stopinc Ag, Zug (Schweiz) Vorrichtung zum Auswechseln von Gießrohren
US4199087A (en) * 1978-01-25 1980-04-22 United States Steel Corporation Apparatus for injection of inert gas to prevent superspeed effect

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3634893C1 (en) * 1986-10-14 1988-03-31 Didier Werke Ag Casting-pipe arrangement, particularly for launders in continuous casting installations
RU2200645C2 (ru) * 2001-06-08 2003-03-20 Открытое акционерное общество "Новолипецкий металлургический комбинат" Устройство для непрерывной разливки стали

Also Published As

Publication number Publication date
DE3362258D1 (en) 1986-04-03
JPS58209453A (ja) 1983-12-06
BE893168A (fr) 1982-11-16
EP0094926A1 (fr) 1983-11-23
US4519438A (en) 1985-05-28
JPH0142787B2 (enrdf_load_stackoverflow) 1989-09-14

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