EP0302040A2 - Verbesserungen an Pfannen zum Giessen von Metall - Google Patents

Verbesserungen an Pfannen zum Giessen von Metall Download PDF

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Publication number
EP0302040A2
EP0302040A2 EP88870124A EP88870124A EP0302040A2 EP 0302040 A2 EP0302040 A2 EP 0302040A2 EP 88870124 A EP88870124 A EP 88870124A EP 88870124 A EP88870124 A EP 88870124A EP 0302040 A2 EP0302040 A2 EP 0302040A2
Authority
EP
European Patent Office
Prior art keywords
annular chamber
internal nozzle
hollow element
fixed plate
plate
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.)
Granted
Application number
EP88870124A
Other languages
English (en)
French (fr)
Other versions
EP0302040B1 (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 pouring.
  • 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 dart of the burner 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 aimed 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 service life 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 each communicating 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 core born 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 down the annular chamber and therefore towards the plate fixed 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 provided near the lower edge of the ferrule 4.
  • the cooling fluid is preferably in neutral gas, for example argon or desiccated 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)
  • Laminated Bodies (AREA)
  • Cookers (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Supercharger (AREA)
  • Continuous Casting (AREA)
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 true EP0302040A2 (de) 1989-02-01
EP0302040A3 EP0302040A3 (en) 1990-03-07
EP0302040B1 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)

Cited By (1)

* 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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Citations (4)

* 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
US3460609A (en) * 1964-07-23 1969-08-12 Erik Allan Olsson Nozzle for supplying melt to a mould in a continuous casting machine
US3596804A (en) * 1969-03-07 1971-08-03 Westinghouse Electric Corp Pouring spout for continuous casting of molten metals
WO1986003147A1 (fr) * 1984-11-23 1986-06-05 Desaar Rene Perfectionnements aux poches de coulee pour metal en fusion

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JPS6243656Y2 (de) * 1985-04-01 1987-11-13

Patent Citations (4)

* 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
US3460609A (en) * 1964-07-23 1969-08-12 Erik Allan Olsson Nozzle for supplying melt to a mould in a continuous casting machine
US3596804A (en) * 1969-03-07 1971-08-03 Westinghouse Electric Corp Pouring spout for continuous casting of molten metals
WO1986003147A1 (fr) * 1984-11-23 1986-06-05 Desaar Rene Perfectionnements aux poches de coulee pour metal en fusion

Cited By (1)

* 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

Also Published As

Publication number Publication date
JPH01104462A (ja) 1989-04-21
EP0302040B1 (de) 1992-09-16
BE1000777A7 (fr) 1989-04-04
US4844303A (en) 1989-07-04
DE3874648D1 (de) 1992-10-22
EP0302040A3 (en) 1990-03-07
ATE80570T1 (de) 1992-10-15

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