EP0302040B1 - Verbesserungen an Pfannen zum Giessen von Metall - Google Patents

Verbesserungen an Pfannen zum Giessen von Metall Download PDF

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Publication number
EP0302040B1
EP0302040B1 EP88870124A EP88870124A EP0302040B1 EP 0302040 B1 EP0302040 B1 EP 0302040B1 EP 88870124 A EP88870124 A EP 88870124A EP 88870124 A EP88870124 A EP 88870124A EP 0302040 B1 EP0302040 B1 EP 0302040B1
Authority
EP
European Patent Office
Prior art keywords
ladle
annular chamber
fixed plate
inner nozzle
annular
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
EP88870124A
Other languages
English (en)
French (fr)
Other versions
EP0302040A2 (de
EP0302040A3 (en
Inventor
René Desaar
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.)
Recherches Et Developpements Desaar SA
Original Assignee
Recherches Et Developpements Desaar SA
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 Recherches Et Developpements Desaar SA filed Critical Recherches Et Developpements Desaar SA
Priority to AT88870124T priority Critical patent/ATE80570T1/de
Publication of EP0302040A2 publication Critical patent/EP0302040A2/de
Publication of EP0302040A3 publication Critical patent/EP0302040A3/fr
Application granted granted Critical
Publication of EP0302040B1 publication Critical patent/EP0302040B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 ladles for molten metal and it relates more particularly to an improvement to these ladles for vigorously cooling from the inside the refractory elements which are inside the metal casings or cassettes of the closure closure device. these pockets during use and maintenance.
  • the bottom of the ladles has an internal nozzle forming a pouring channel for the molten metal and a closure device with an external nozzle to prevent or allow the molten metal to flow out of the ladle.
  • the jet of liquid metal flows through the pouring channel of the internal nozzle of refractory material and then passes through a tap hole in the elements of refractory material of the closure device.
  • the molten metal regularly erodes the wall of the pouring channel of the internal nozzle and produces a fairly significant wear of the wall of the tap hole in the refractory elements of the closure device under the effect of the high temperature of the liquid metal, and in particular the fixed plate and the movable plate which are located between the internal nozzle and the external nozzle.
  • This has the effect of bringing the fixed refractory plate of the closure device to a high temperature and of impeding the sliding of the mobile refractory plate on the fixed refractory plate to allow it to flow or stop. the jet of liquid metal at each pour.
  • the high temperature of the fixed plate causes detrimental decarburization of the refractory of this fixed plate.
  • this metal and slag core is burned using a lance with oxygen so as to clean the wall of the internal nozzle.
  • the burner dart then causes at the point of contact, a very significant rise in temperature and a deterioration of the surface of the pouring channel.
  • the object of the invention is precisely an improvement aiming also at ensuring effective continuous cooling of the aforementioned refractory elements so as to avoid the drawbacks mentioned above.
  • a ladle in which the internal nozzle is surrounded by an annular chamber over a part of its length, this annular chamber containing a hollow element whose internal volume is in communication with a pipe.
  • supply line for a cooling fluid said hollow element extending in the annular chamber so as to at least partially surround the internal nozzle, the wall of the hollow element being pierced with several orifices distributed along its length so as to direct cooling jets directly towards the fixed plate of the pocket closure device around the tap hole in this plate.
  • Means are also provided for evacuating the coolant from the annular chamber to the outside atmosphere.
  • the refractory elements of the closure device have a considerably longer lifespan than that of the known devices for closing the ladles.
  • the internal nozzle 12 of refractory material is housed in an opening in the seat brick 11 of refractory material which lines the bottom of the pocket.
  • the closing device 20 comprises a fixed element 22 integral with the bottom of the pocket and a mobile element 23 actuated by a drive device (not shown) in order to bring the external nozzle 21 into alignment with the pouring channel to let a jet of liquid metal flow or to close off the pouring channel.
  • the fixed element 22 comprises a refractory plate, called a fixed plate, housed in a metal case and pierced with a tap hole;
  • the movable element 23 comprises a refractory plate housed in a metal case and pierced with one or more tap holes communicating each with an external nozzle.
  • the entire casting device is shown on a larger scale in FIG. 2.
  • the internal nozzle is here made of two parts: the nozzle body 12A and a wear part 12B adjoining the fixed plate 22 of the closing device at which it is joined by a bead 2.
  • the internal nozzle 12 could of course be in one piece.
  • the wear part 12B of the internal nozzle 12, or the equivalent end part of a nozzle is surrounded by an annular chamber 3 externally limited by a metallic ferrule 4 and in the annular chamber 3 is disposed a hollow element 5 which extends transversely to the axis I of the pouring channel 1 so as to at least partially surround the nozzle 12.
  • the hollow element 5 has a curved shape which extends along a major part of the perimeter of the shell 4 but it can also form a ring.
  • the hollow element 5 is welded inside the shell 4 in several places distributed around its periphery or continuously over the entire length of said element.
  • the interior of the hollow element 5 is in communication with a pipe 6 for the supply of a coolant, and the wall of the hollow element 5 is pierced with several orifices 7 distributed over its entire length so as to direct jets of coolant towards the bottom of the annular chamber and therefore towards the fixed plate 22 all around the taphole in this refractory plate.
  • the wear part 12B of the internal nozzle 12 is formed with a peripheral housing for receiving the cooling element 5 and the fixed plate 22 is profiled so that its part 22A which is located around the tap hole is partially surrounded by the lower part of the annular chamber 3 which receives the cooling jets distributed by the distributor ring 5, which further promotes the cooling efficiency of the fixed plate 22.
  • the coolant is evacuated by channels 9 which extend radially along the surface of the fixed plate 22 between the lower part of the annular chamber 3 and the external atmosphere through orifices 8 formed near the lower edge of the ferrule 4.
  • the jets of coolant directed directly towards the plate 22 energetically and uniformly cool this fixed plate and avoid the too rapid wear of the refractory wall of the taphole in this plate.
  • the coolant is preferably neutral gas, for example argon or dried air, so as to avoid decarburization of the refractory constituting the fixed plate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Continuous Casting (AREA)
  • Cookers (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)
  • Supercharger (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Claims (5)

  1. Gießpfanne für geschmolzenes Metall mit folgenden Merkmalen:
       eine innen liegende Düse bildet einen Gußkanal und eine Schließvorrichtung der Pfanne besteht aus einem festen Element und einem beweglichen Element;
       die innen liegende Düse wird von einer ringförmigen Kühlkammer auf einem Teil seiner Länge umgeben,
    gekennzeichnet durch folgende Merkmale:
       die ringförmige Kammer (3) enthält ein hohles Element (5), dessen Innenvolumen in Verbindung mit einer Zuführleitung (6) für Kühlflüssigkeit steht;
       das hohle Element (5) erstreckt sich in der ringförmigen Kammer, um mindestens teilweise die innen liegende Düse (12) zu umgeben;
       die Wand des hohlen Elements (5) ist mit mehreren kleinen öffnungen (7) durchbrochen, die auf der Länge des Elements in der Weise verteilt sind, daß Kühlflüssigkeitsstrahlen auf die feste Platte (22) der Schließvorrichtung der Pfanne um das Gießloch in der Platte (22) gerichtet werden.
  2. Gießpfanne nach Anspruch 1,
    dadurch gekennzeichnet, daß sie Einrichtungen zum Entleeren der in der ringförmigen Kammer (3) verteilten Kühlflüssigkeit zur Außenatmosphäre aufweist und daß diese Einrichtungen Kanäle (9) umfassen, die sich radial entlang der Oberfläche der festen Platte (22) vom Umfang der ringförmigen Kammer (3) aus erstrecken.
  3. Gießpfanne nach Anspruch 1 oder 2,
    dadurch gekennzeichnet, daß die ringförmige Kammer (3) nach außen durch einen metallischen Reif oder Ring (4) begrenzt ist.
  4. Gießpfanne nach Anspruch 1, 2 oder 3,
    dadurch gekennzeichnet, daß der Teil der festen Platte (22), welcher das Gießloch umgibt, in der Weise profiliert ist, daß es teilweise durch den unteren Teil der ringförmigen Kammer 3 umgeben wird.
  5. Gießpfanne nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, daß das Ende der innen liegenden Düse (12), die neben bzw. über der festen Platte (22) der Schließeinrichtung angeordnet ist, mit einem Unterbringungsraum am Rande zur Aufnahme des hohlen Elements (5) geformt ist.
EP88870124A 1987-07-31 1988-07-15 Verbesserungen an Pfannen zum Giessen von Metall Expired - Lifetime EP0302040B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88870124T ATE80570T1 (de) 1987-07-31 1988-07-15 Verbesserungen an pfannen zum giessen von metall.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE8700855A BE1000777A7 (fr) 1987-07-31 1987-07-31 Perfectionnement aux poches de coulee de metal.
BE8700855 1987-07-31

Publications (3)

Publication Number Publication Date
EP0302040A2 EP0302040A2 (de) 1989-02-01
EP0302040A3 EP0302040A3 (en) 1990-03-07
EP0302040B1 true EP0302040B1 (de) 1992-09-16

Family

ID=3882798

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88870124A Expired - Lifetime EP0302040B1 (de) 1987-07-31 1988-07-15 Verbesserungen an Pfannen zum Giessen von Metall

Country Status (6)

Country Link
US (1) US4844303A (de)
EP (1) EP0302040B1 (de)
JP (1) JPH01104462A (de)
AT (1) ATE80570T1 (de)
BE (1) BE1000777A7 (de)
DE (1) DE3874648D1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3927468A1 (de) * 1989-08-19 1991-03-21 Cerafer Sarl Ausguss fuer metallurgische giessgefaesse
CH684937A5 (de) * 1991-11-19 1995-02-15 Stopinc Ag Verschlussplatte für einen Schiebeverschluss an einem Metallschmelze enthaltenden Behälter.
JP4885061B2 (ja) * 2007-05-28 2012-02-29 東京窯業株式会社 取鍋
CN101462154B (zh) * 2008-11-28 2011-05-18 苏州明志科技有限公司 插入式热芯盒用水冷射嘴结构

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2517931A (en) * 1947-05-15 1950-08-08 Rossi Irving Apparatus for the continuous casting of metal
BE667322A (de) * 1964-07-23
US3596804A (en) * 1969-03-07 1971-08-03 Westinghouse Electric Corp Pouring spout for continuous casting of molten metals
DE2548854A1 (de) * 1975-10-31 1977-05-05 Metacon Ag Feuerfester stein mit einer durchlassoeffnung fuer fluessiges metall und verfahren zu dessen herstellung
GB2093169B (en) * 1981-02-12 1984-11-21 Flogates Ltd Metal pouring apparatus and method
DE3562572D1 (en) * 1984-11-23 1988-06-16 Rene Desaar Improvements to molten metal ladles
JPS6243656Y2 (de) * 1985-04-01 1987-11-13

Also Published As

Publication number Publication date
US4844303A (en) 1989-07-04
ATE80570T1 (de) 1992-10-15
JPH01104462A (ja) 1989-04-21
DE3874648D1 (de) 1992-10-22
EP0302040A2 (de) 1989-02-01
EP0302040A3 (en) 1990-03-07
BE1000777A7 (fr) 1989-04-04

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