EP0495764B1 - Vorwärmvorrichtung für den Ausguss einer Metallgiessanlage - Google Patents

Vorwärmvorrichtung für den Ausguss einer Metallgiessanlage Download PDF

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Publication number
EP0495764B1
EP0495764B1 EP92870003A EP92870003A EP0495764B1 EP 0495764 B1 EP0495764 B1 EP 0495764B1 EP 92870003 A EP92870003 A EP 92870003A EP 92870003 A EP92870003 A EP 92870003A EP 0495764 B1 EP0495764 B1 EP 0495764B1
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EP
European Patent Office
Prior art keywords
nozzle
pouring
hot gaseous
sleeve
casting nozzle
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
EP92870003A
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English (en)
French (fr)
Other versions
EP0495764A1 (de
Inventor
Paul Naveau
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.)
Centre de Recherches Metallurgiques CRM ASBL
Original Assignee
Centre de Recherches Metallurgiques CRM ASBL
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Publication date
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Publication of EP0495764A1 publication Critical patent/EP0495764A1/de
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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
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • B22D41/60—Pouring-nozzles with heating or cooling means

Definitions

  • the present invention relates to a device for preheating a pouring nozzle of a molten metal as used especially in containers for continuous casting of steel.
  • the pouring containers essentially comprise the ladles and the distribution baskets, these being specifically intended for continuous casting.
  • the description which follows will relate, by way of example nonlimiting, on a distributor basket nozzle.
  • the pouring nozzle materializes the taphole by where the steel flows from a first container to a second container, by example of a distribution basket to a continuous casting mold.
  • a pouring nozzle generally has two parts which one after the other.
  • the first part called the pouring brick or nozzle bottom, is in fact a particular refractory brick, housed in the refractory lining at the bottom of the basket and pierced with a channel which constitutes the tap hole.
  • This bottom nozzle is usually extended by a refractory tube of appropriate section, called a nozzle outside or submerged nozzle because its end dips generally in the steel contained in the mold.
  • a pouring nozzle is also provided with various equipment, in particular of a tap hole closure system.
  • This system can simply consist of a profiled or stopper refractory pad, which is applied to a seat, also profiled, formed at the entrance to the bottom nozzle. It can also consist of a set of drawers, possibly rotating, preferably mounted between the bottom nozzle and the outer nozzle.
  • a type of special nozzle with a refractory dome inside of the appropriately enlarged outer nozzle, this dome being intended to form a hollow jet of metal flowing along the wall inside of the outer nozzle.
  • JP-A-61 219 452 discloses a process for preheating a basket nozzle. continuous flow distributor, in which the hot gases sucked through the nozzle are accumulated in a preheating box surrounding the nozzle, before being rejected outside.
  • Patent CH-A-597,949 describes a method and a device for preheating the brick and the pouring pad in a cold distribution basket, without suction of hot gases to across the nozzle.
  • the object of the present invention is to provide a simple and economical device which does not have the aforementioned drawbacks and which can be used without difficulty with all types of pouring nozzle.
  • a device for preheating a nozzle casting a molten metal which comprises means for producing a gaseous medium hot near the inlet of said pouring nozzle and means, located at the outlet end of said pouring nozzle, for circulating said gaseous medium in said pouring nozzle, along its entire length and in the direction of metal flow during casting, is characterized in that said means for circulation include a suction venturi of which the converging part is connected at the orifice of the pouring nozzle, in the extension thereof.
  • This type of device is well known per se in the art. It basically consists of a venturi which comprises, at the end of the converging part, immediately upstream of the neck, a lateral supply of gas under low pressure, for example in slightly compressed air. This lateral injection of low pressure air has the effect to cause the suction of a much greater flow of air, or any other gas, in the converging part of the venturi.
  • the venturi is mounted with its converging part connected, as indicated above, at the outlet orifice of the pouring nozzle, and its divergent part opening out either the open air is in a hot gas collection system.
  • the means for producing a hot gaseous medium are advantageously constituted by at least one burner, in particular by the burners used for preheating the pouring vessel.
  • the device of the invention comprises a sleeve arranged in the pouring container so as to surround the inlet opening of the pouring nozzle.
  • This sleeve is preferably of frustoconical shape; it is placed on its large base around the tap hole and its small base can thus allow passage to the stopper rod sealing the tap hole. It can of course have any other form suitable such as cylinder or pyramid trunk.
  • the sleeve is advantageously provided with lateral holes, preferably located at near its large base. These holes are intended to allow the gaseous medium to pass hot, especially hot air, present in the pouring vessel and drawn through the pouring nozzle by the aforementioned suction means.
  • the device of the invention is essentially removable.
  • the suction means, in especially the venturi, as well as the sleeve are put in place for the preheating of the nozzle and they are removed for the casting of molten metal.
  • the tap hole is closed and opened by a stopper 4.
  • the interior of the basket is preheated by means of burners, not shown; this preheating is symbolized by the scrolls 5, showing the hot air present in the basket.
  • a suction venturi 6 is mounted at the outlet end of the nozzle exterior 3, in the extension thereof, with its converging part connected to the nozzle outlet.
  • This venturi 6 is supplied with compressed air at low pressure through a side opening opening upstream of the neck and connected to a source of compressed air symbolized by arrow 7.
  • the device is advantageously completed by a sleeve 8, preferably frustoconical, placed on the refractory bottom 1, around the tap hole.
  • the section of the sleeve 8 must be sufficient to allow passage stopper 4.
  • the sleeve 8 is further provided with holes 9 to its lower part, that is to say near the surface of the bottom 1.
  • the presence of the sleeve 8 makes it possible to maintain a volume of hot air and thus preventing the cooling of the stopper rod 4 and the pouring if the basket preheating stops.
  • the preheating of various types of pouring nozzles was carried out using a suction venturi made of stainless steel having a diameter of 40 mm at the neck.
  • the air was compressed to 4 bar and its flow rate was 80 Nm 3 / h.
  • the device only requires the consumption of compressed air at low pressure and at low flow.
  • it is suitable to ensure preheating all types of casting nozzles, in particular of the hollow jet nozzle with distribution dome, because the current hot air runs from top to bottom, i.e. in the same sense that metal during casting.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Coating With Molten Metal (AREA)
  • Continuous Casting (AREA)

Claims (8)

  1. Vorwärmvorrichtung eines Ausgusses (2, 3) für eine Metallschmelze, die Mittel zur Erzeugung eines heißen gasförmigen Mediums (5) in der Nähe der Einlaßöffnung des Ausgusses (2) und sich am Auslaßende des Ausgusses (2, 3) befindende Mittel (6) zur Zirkulierung des heißen gasförmigen Mediums (5) im Ausguß (2, 3) über dessen gesamte Länge und in Fließrichtung des Metalls während des Gießens umfaßt, dadurch gekennzeichnet, daß die Zirkulierungsmittel (6) eine Venturisaugdüse umfassen, deren konvergierender Teil mit der Öffnung des Ausgusses (2, 3) in dessen Verlängerung verbunden ist.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Mittel zur Erzeugung des heißen gasförmigen Mediums (5) mindestens einen Brenner umfassen.
  3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß sie eine um die Einlaßöffnung des Ausgusses (2, 3) herum in dessen Verlängerung angeordnete Muffe (8) aufweist.
  4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Muffe (8) mit Löchern (9) ausgebildet ist, die das heiße gasförmige Medium (5) passieren lassen sollen.
  5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß sich die Löcher (9) am unteren Teil der Muffe (8) befinden.
  6. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Venturidüse (6) aus nicht rostendem Stahl hergestellt ist.
  7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Venturidüse (6) von der Seite mit Druckluft mit einem Druck von ca. 4 bar versorgt wird.
  8. Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Auslaßöffnung des Ausgusses (2, 3) bzw. der Zirkulierungsmittel (6) mit einem System zum Auffangen des heißen gasförmigen Mediums (5) verbunden ist.
EP92870003A 1991-01-16 1992-01-07 Vorwärmvorrichtung für den Ausguss einer Metallgiessanlage Expired - Lifetime EP0495764B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE9100033 1991-01-16
BE9100033A BE1004612A6 (fr) 1991-01-16 1991-01-16 Dispositif de prechauffage d'une busette de coulee d'un metal en fusion.

Publications (2)

Publication Number Publication Date
EP0495764A1 EP0495764A1 (de) 1992-07-22
EP0495764B1 true EP0495764B1 (de) 1998-12-09

Family

ID=3885280

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92870003A Expired - Lifetime EP0495764B1 (de) 1991-01-16 1992-01-07 Vorwärmvorrichtung für den Ausguss einer Metallgiessanlage

Country Status (5)

Country Link
EP (1) EP0495764B1 (de)
JP (1) JPH0623519A (de)
AT (1) ATE174238T1 (de)
BE (1) BE1004612A6 (de)
DE (1) DE69227789T2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007016018A1 (de) 2007-04-03 2008-10-09 Sms Demag Ag Brenneranordnung

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7263942B1 (en) 2006-07-28 2007-09-04 Mitsubishi Heavy Industries, Ltd. Fin stabilizer for vessel and control method and control program therefor
JP2013169560A (ja) * 2012-02-20 2013-09-02 Akechi Ceramics Co Ltd ロングノズル予熱用吸引加熱装置およびそれを用いたロングノズルの予熱方法
CN106862548A (zh) * 2017-03-24 2017-06-20 石家庄钢铁有限责任公司 一种连铸中间包水口在线烘烤底抽风装置及方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH597949A5 (en) * 1976-07-27 1978-04-14 Concast Ag Preheating bottom outlet stopper of cold tundish
GB2123726A (en) * 1982-07-01 1984-02-08 James Menzies Thornton Ladle etc. stopper
BE1004282A6 (fr) * 1989-06-27 1992-10-27 Centre Rech Metallurgique Dispositif de prechauffage d'une busette de coulee d'un metal en fusion et installation de coulee d'un metal equipee de ce dispositif.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007016018A1 (de) 2007-04-03 2008-10-09 Sms Demag Ag Brenneranordnung

Also Published As

Publication number Publication date
JPH0623519A (ja) 1994-02-01
ATE174238T1 (de) 1998-12-15
BE1004612A6 (fr) 1992-12-22
EP0495764A1 (de) 1992-07-22
DE69227789T2 (de) 1999-07-01
DE69227789D1 (de) 1999-01-21

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