EP0440899A1 - Feuerfeste Ausgussvorrichtung - Google Patents

Feuerfeste Ausgussvorrichtung Download PDF

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Publication number
EP0440899A1
EP0440899A1 EP90122591A EP90122591A EP0440899A1 EP 0440899 A1 EP0440899 A1 EP 0440899A1 EP 90122591 A EP90122591 A EP 90122591A EP 90122591 A EP90122591 A EP 90122591A EP 0440899 A1 EP0440899 A1 EP 0440899A1
Authority
EP
European Patent Office
Prior art keywords
pouring device
immersion
immersion nozzle
refractory pouring
refractory
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.)
Withdrawn
Application number
EP90122591A
Other languages
German (de)
English (en)
French (fr)
Inventor
Udo Weber
Ernst Lührsen
Albert Ott
Steve Lee
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.)
Didier Werke AG
Original Assignee
Didier Werke AG
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 Didier Werke AG filed Critical Didier Werke AG
Publication of EP0440899A1 publication Critical patent/EP0440899A1/de
Withdrawn legal-status Critical Current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
    • B22D41/505—Rings, inserts or other means preventing external nozzle erosion by the slag

Definitions

  • the invention relates to a refractory pouring device with an immersion nozzle and with an external reinforcement, which is defined as a separate component on the immersion nozzle and which, in operation, projects upwards and downwards over a casting powder cover of a molten steel.
  • Such a pouring device is described in DE-PS 20 42 897.
  • the external reinforcement is held by means of a thread or bayonet lock or stops on the immersion spout.
  • the immersion nozzle and the outer reinforcement obviously consist of the same refractory material.
  • DE-AS 29 36 480 describes an immersion spout in which a refractory layer is integrated in the area of the melt level. This should include 70% to 90% Contain zirconium oxide and 2% to 10% carbon. This layer would have to be made in one piece with the immersion nozzle. In practice, this is difficult. The carbon content of the layer is unfavorable because it can burn out during operation, which increases the porosity of the layer and makes it susceptible to erosion. It is also unfavorable that the one-piece production of the layer with the immersion spout creates mechanical stresses that cause the layer to burst under temperature stress.
  • the refractory material of the immersion nozzle contains aluminum oxide and carbon.
  • the carbon contributes to the binding of the aluminum oxide and leads to an advantageous thermal conductivity of the immersion nozzle. This is erosion resistant to molten steel.
  • DE-33 41 524 C3 describes a refractory molded body made from partially stabilized zirconium dioxide. This molded body is carbon-free. CaO, MgO or Y2O3 is provided for stabilization. The molding is bonded directly without carbon and binder by firing at high temperatures between 1600 ° C and 2000 ° C.
  • the object of the invention is to propose a pouring device of the type mentioned which, with good erosion resistance of the immersion spout against molten steel, has an improved erosion resistance of the external reinforcement against casting powder to extend the service life.
  • immersion spouts made of carbon-bonded magnesium oxide which on the one hand have excellent corrosion resistance to molten steel, in particular also against oxygen-rich calcium and / or silicon-alloyed steels, but on the other hand are very sensitive to corrosion in the casting powder area, in principle with the aid of the inventive To make external reinforcement possible.
  • the above object is achieved in a pouring device of the type mentioned at the outset in that the outer reinforcement consists of a zirconium oxide which is directly bonded carbon-free by firing at high temperature, and in that the immersion nozzle essentially consists of carbon-bonded magnesium oxide, or also of carbon-bonded aluminum oxide or quartz material .
  • the immersion nozzle and the outer reinforcement are made of different materials, the material of the immersion nozzle being adapted to the stress of the immersion nozzle by the melt, while the material of the external reinforcement is adapted to the stress caused by the casting powder.
  • Both parts, namely the immersion nozzle and the outer reinforcement are manufactured separately, so that the respective manufacturing conditions do not influence each other.
  • the external reinforcement can be pushed onto the immersion nozzle. Accordingly, it can also be replaced if necessary.
  • immersion spouts made in a known manner can also be subsequently provided with the external reinforcement.
  • the external reinforcement is erosion-resistant against the influence of the mold powder. This can be attributed to the fact that the zirconium oxide is bound carbon-free.
  • the external reinforcement also has a high resistance to temperature changes due to its geometry.
  • the external reinforcement can be easily combined with such immersion spouts which consist of carbon-bound magnesium oxide, carbon-bound aluminum oxide or quartz material and are therefore erosion-resistant to the melt.
  • annular gap is provided between the immersion nozzle and the external reinforcement in the cold state, which absorbs different thermal expansions of the immersion nozzle and the external reinforcement.
  • the pouring device is cold, there is an annular gap.
  • the immersion nozzle expands in the direction of the external reinforcement without blowing it up.
  • An immersion nozzle (1) is made on the basis of carbon-bound magnesium oxide or in a manner known per se on the basis of carbon-bound aluminum oxide or quartz.
  • the immersion spout (1) according to FIG. 1 has outlet openings (3) formed on its periphery in the region of an outlet end (2).
  • an outlet opening (3) is provided at the outlet end (2).
  • a step (4) is formed on the immersion spout (1).
  • the outer circumference of the immersion spout (1) is cylindrical between the step (4) and the outlet end (2).
  • a sleeve (5) is pushed onto the immersion spout (1) from its outlet end (2) as external reinforcement.
  • the step (4) forms an axial stop. It is arranged and the length (L) of the sleeve (5) is such that the sleeve (5) extends above and below a casting powder cover of the respective molten bath during operation.
  • the sleeve (5) lies above the outlet openings (3).
  • the cuff (5) extends to the outlet end (2).
  • annular gap (6) between the cylindrical outer circumference of the immersion spout (1) and the cylindrical, dimensionally stable sleeve (5).
  • the cuff (5) is fixed axially axially to the immersion spout (1) by a putty or mortar layer (7) provided in the annular gap (6).
  • the putty or mortar layer (7) is deformable in such a way that it gives way to the sleeve (5) when the immersion spout (1) expands. It can partially emerge from the annular gap (6).
  • the sleeve (5) is made of a material which contains 94% by weight to 97% by weight of zirconium dioxide, no carbon and 2% to 4% by weight of calcium oxide, magnesium oxide or yttrium oxide or mixtures thereof for stabilization.
  • the sleeve (5) is fired at temperatures between 1600 ° C and 2000 ° C.
  • the sleeve (5) could also be fixed against displacement by means of projections on the immersion spout (1).
  • Protrusions of the immersion spout (1) can protrude individually on its outer circumference or be designed in a ring or thread. This makes it possible to fix the sleeve (5) to the immersion spout (1) by means of a bayonet-type or thread-type connecting means.
  • the projection for fixing the sleeve (5) to the immersion nozzle (1) is a ring which forms a third separate component of the pouring device, then this can consist of the same refractory material as the immersion nozzle (1) and onto the immersion nozzle (1). to be firmly cemented on.
  • the annular gap (6) remains free. In this case, first the sleeve (5) is loosely pushed onto the immersion spout (1) up to step (4). Then the ring is pushed from below via the outlet end (2) until it almost hits the cuff (5). In this position the ring is cemented with the immersion nozzle (1).
  • a separate ring can also be provided as an annular projection on the immersion spout (1). Like the aforementioned ring, this can be cemented onto the immersion spout (1) or connected to it in the manner of a thread or a bayonet lock.
  • the ring or rings can be made of the same refractory material as the immersion spout (1), since they lie outside the area of the mold powder, so they are not used by it. The choice of the same material is favorable because the ring or rings then have the same properties as the immersion nozzle.
  • the ring or ring-shaped projection can itself be formed from refractory putty or mortar. The cuff then advantageously has a chamfered edge (8).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Compositions Of Oxide Ceramics (AREA)
EP90122591A 1990-02-07 1990-11-27 Feuerfeste Ausgussvorrichtung Withdrawn EP0440899A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4003608 1990-02-07
DE4003608A DE4003608C1 (enrdf_load_stackoverflow) 1990-02-07 1990-02-07

Publications (1)

Publication Number Publication Date
EP0440899A1 true EP0440899A1 (de) 1991-08-14

Family

ID=6399599

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90122591A Withdrawn EP0440899A1 (de) 1990-02-07 1990-11-27 Feuerfeste Ausgussvorrichtung

Country Status (5)

Country Link
US (1) US5092500A (enrdf_load_stackoverflow)
EP (1) EP0440899A1 (enrdf_load_stackoverflow)
JP (1) JPH0751817A (enrdf_load_stackoverflow)
CA (1) CA2035787A1 (enrdf_load_stackoverflow)
DE (1) DE4003608C1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10689616B1 (en) 2009-10-29 2020-06-23 The Trustees Of Dartmouth College T-cell receptor-deficient t cell compositions

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4221618A1 (de) * 1992-07-01 1994-01-13 Didier Werke Ag Eintauchausguss mit Schutzhülse und Verfahren zu deren Verbinden
US5590681A (en) * 1993-07-02 1997-01-07 Frank W. Schaefer, Inc. Valve assembly
AU7321694A (en) * 1993-07-02 1995-01-24 Frank W. Schaefer, Inc. Low pressure casting process and apparatus
DE19637960C2 (de) * 1996-09-18 1999-08-19 Didier Werke Ag Mehrschichtiger feuerfester Verschleißkörper
US5866022A (en) * 1997-03-24 1999-02-02 North American Refractories Company Refractory pour tube with cast plate
DE19856992C2 (de) * 1997-06-28 2000-11-02 Didier Werke Ag Keramischer Verbundkörper
WO1999057077A1 (de) 1998-05-05 1999-11-11 Didier-Werke Ag Keramischer verbundkörper
US6168753B1 (en) * 1998-08-07 2001-01-02 Alphatech, Inc. Inert pump leg adapted for immersion in molten metal
US6116079A (en) * 1999-01-05 2000-09-12 Asarco Incorporated Liquid copper hydrogen sample probe
US6932250B2 (en) * 2003-02-14 2005-08-23 Isg Technologies Inc. Submerged entry nozzle and method for maintaining a quiet casting mold
AU2008310427B2 (en) * 2007-10-09 2011-03-31 Krosakiharima Corporation Nozzle for continuous casting and method for manufacturing the same
US8172114B2 (en) * 2008-07-28 2012-05-08 Krosakiharima Corporation Refractory material for nozzle for use in continuous casting, and continuous casting nozzle
CN112536431A (zh) * 2020-10-08 2021-03-23 江苏高鑫高温新材料科技有限公司 一种耐高温氧化锆渣线环组合侵入式水口
CN112122605A (zh) * 2020-10-15 2020-12-25 江苏高鑫高温新材料科技有限公司 热稳定性优良抗侵蚀性好的中间包进水口

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH500790A (de) * 1969-09-16 1970-12-31 Concast Ag Vorrichtung zum Giessen mit Giessrohren auf einer Stranggiessanlage für Stahl
DE2459601B1 (de) * 1974-12-13 1976-03-04 Mannesmann Ag Feuerfeste keramische masse
FR2500773A1 (fr) * 1981-01-16 1982-09-03 Didier Werke Ag Busette de coulee immergee refractaire
BE904489A (nl) * 1986-03-26 1986-07-16 Hopchet Ivan Oppervlaktestruktuur voor afsluiters en dergelijke voor vloeibare metalen, en afsluiters hierdoor bekomen.
WO1989007985A1 (en) * 1988-03-03 1989-09-08 Vesuvius Crucible Company Plasma spray coated ceramic bodies and method of making same

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1995109U (de) * 1967-10-23 1968-10-24 Stoecker & Kunz Gmbh Feuerfester ausguss fuer giesspfannen od. dgl.
US3934640A (en) * 1969-09-16 1976-01-27 Concast Ag Submerged nozzle for continuous casting
DE2019541C3 (de) * 1970-04-23 1975-02-06 Didier-Werke Ag, 6200 Wiesbaden Als Verbundkörper ausgebildeter Ausguß an flüssige Metallschmelze enthaltenden Behältern
DE2500478A1 (de) * 1975-01-08 1976-07-15 Didier Werke Ag Eintauchausguss fuer stranggussanlagen
DE2646707C3 (de) * 1976-10-13 1984-01-26 Mannesmann AG, 4000 Düsseldorf Tauchausguß aus feuerfestem Werkstoff für das Stranggießen von Stahl
DE2936480C2 (de) * 1979-09-10 1983-11-03 Akechi Taikarenga K.K., Ena, gifu Feuerfester Werkstoff für einen Tauchausguß
DE3300166C2 (de) * 1983-01-05 1986-07-17 ARBED Saarstahl GmbH, 6620 Völklingen Mehrteiliger Tauchausguß für Stranggießanlagen
DE3339586A1 (de) * 1983-11-02 1985-05-23 Didier-Werke Ag, 6200 Wiesbaden Eintauchausguss
DE3341524A1 (de) * 1983-11-17 1985-05-30 Didier-Werke Ag, 6200 Wiesbaden Feuerfester formkoerper aus teilstabilisiertem zirkoniumdioxid
DE3420835C2 (de) * 1984-06-05 1989-11-23 Chamotte- und Tonwerk Kurt Hagenburger, 6718 Grünstadt Keramischer Ausguß
GB8704764D0 (en) * 1987-02-28 1987-04-01 Thor Ceramics Ltd Tubular refractory product
JPS63303679A (ja) * 1987-06-05 1988-12-12 Toshiba Ceramics Co Ltd 鋳造用浸漬ノズル
JPH066256A (ja) * 1992-06-19 1994-01-14 Matsushita Electric Ind Co Ltd 送受信システム

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH500790A (de) * 1969-09-16 1970-12-31 Concast Ag Vorrichtung zum Giessen mit Giessrohren auf einer Stranggiessanlage für Stahl
DE2459601B1 (de) * 1974-12-13 1976-03-04 Mannesmann Ag Feuerfeste keramische masse
FR2500773A1 (fr) * 1981-01-16 1982-09-03 Didier Werke Ag Busette de coulee immergee refractaire
BE904489A (nl) * 1986-03-26 1986-07-16 Hopchet Ivan Oppervlaktestruktuur voor afsluiters en dergelijke voor vloeibare metalen, en afsluiters hierdoor bekomen.
WO1989007985A1 (en) * 1988-03-03 1989-09-08 Vesuvius Crucible Company Plasma spray coated ceramic bodies and method of making same

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 6, Nr. 150 (M-148)[1028], 10. August 1982; & JP-A-57 068 254 (MASAO NANBU) 26-04-1982 *
PATENT ABSTRACTS OF JAPAN, Band 6, Nr. 236 (M-173)[1114], 25. November 1982; & JP-A-57 134 252 (SHIN NIPPON SEITETSU K.K.) 19-08-1982 *
PATENT ABSTRACTS OF JAPAN, Band 9, Nr. 121 (M-382)[1844], 25. Mai 1985; & JP-A-60 006 256 (TOSHIBA CERAMICS K.K.) 12-01-1985 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10689616B1 (en) 2009-10-29 2020-06-23 The Trustees Of Dartmouth College T-cell receptor-deficient t cell compositions

Also Published As

Publication number Publication date
JPH0751817A (ja) 1995-02-28
DE4003608C1 (enrdf_load_stackoverflow) 1991-06-27
US5092500A (en) 1992-03-03
CA2035787A1 (en) 1991-08-08

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