EP1878519B1 - Tauchrohr - Google Patents

Tauchrohr Download PDF

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Publication number
EP1878519B1
EP1878519B1 EP06014520A EP06014520A EP1878519B1 EP 1878519 B1 EP1878519 B1 EP 1878519B1 EP 06014520 A EP06014520 A EP 06014520A EP 06014520 A EP06014520 A EP 06014520A EP 1878519 B1 EP1878519 B1 EP 1878519B1
Authority
EP
European Patent Office
Prior art keywords
plate
pouring nozzle
nozzle according
stiffening element
pouring
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.)
Not-in-force
Application number
EP06014520A
Other languages
English (en)
French (fr)
Other versions
EP1878519A1 (de
Inventor
Stephen Lee
Ian Proudfoot
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.)
Refractory Intellectual Property GmbH and Co KG
Original Assignee
Refractory Intellectual Property GmbH and Co KG
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
Priority to PL06014520T priority Critical patent/PL1878519T3/pl
Application filed by Refractory Intellectual Property GmbH and Co KG filed Critical Refractory Intellectual Property GmbH and Co KG
Priority to ES06014520T priority patent/ES2300084T3/es
Priority to DE602006000598T priority patent/DE602006000598T2/de
Priority to EP06014520A priority patent/EP1878519B1/de
Priority to AT06014520T priority patent/ATE387276T1/de
Priority to MX2009000332A priority patent/MX2009000332A/es
Priority to BRPI0713922-5A priority patent/BRPI0713922A2/pt
Priority to RU2008152194/02A priority patent/RU2393054C1/ru
Priority to UAA200900173A priority patent/UA93916C2/ru
Priority to PCT/EP2007/005271 priority patent/WO2008006438A1/en
Priority to CNA2007800263096A priority patent/CN101547761A/zh
Priority to US12/305,366 priority patent/US20090173757A1/en
Publication of EP1878519A1 publication Critical patent/EP1878519A1/de
Application granted granted Critical
Publication of EP1878519B1 publication Critical patent/EP1878519B1/de
Priority to ZA200900015A priority patent/ZA200900015B/xx
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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

Definitions

  • the invention relates to a pouring nozzle.
  • Such pouring nozzle may be used for the transfer of a metal melt from one (upper) metallurgical vessel to a second (lower) metallurgical vessel, for example for the transfer of a steel melt from a ladle to a tundish.
  • Such pouring nozzles are made of at least one refractory material (to withstand the high melt temperatures) and comprise a tubular region, defining a first part of a pouring channel, and a plate like region with an orifice defining a second part of said (common) pouring channel. Said plate like region which usually is integral with said tubular region is arranged at one end of the tubular member. This leads to a T-like design of the total pouring nozzle.
  • two of said pouring nozzles are arranged in the outflow area of a metallurgical melting vessel.
  • One of said two nozzles being mostly arranged within the refractory lining of the vessel, e.g. within a well block.
  • This so called inner nozzle is mounted with its tubular region at its upper end and the plate like region at its lower end.
  • the plate like region may be used as one part of a sliding gate valve.
  • the plate like region has a flat surface at its free (lower) end, which flat surface running perpendicular to a longitudinal axis of the pouring channel, i. e. more or less horizontal in the mounted position of the pouring nozzle.
  • a second nozzle (often called outer nozzle or exchange nozzle) may be installed below said inner nozzle, e.g. mounted vice versa with its plate like part at its upper end and the tubular part at its lower end.
  • This nozzle often may be moved after installation.
  • the free surface of the plate like region should be flat so as it may be used as a sliding surface within a 2 or 3 plates sliding mechanism.
  • a metallic envelope metal casing
  • This casing stabilizes the nozzle and facilitates the exchange of the nozzle.
  • the metallic can further provides the necessary geometrical accuracy for effective fit with a corresponding operational or exchange mechanism and mechanical support to the relatively brittle refractory ceramic nozzle components.
  • thermo-mechanical forces established during preheat of the nozzle Due to a combination of thermo-mechanical forces established during preheat of the nozzle, exchange motion and/or cast operation stresses are created within the nozzle which may result in cracks through its wall, especially at the transition area where the plate and tubular portions meet.
  • the inventors have analyzed by computer simulation studies the origins of said crack formation. It was noted that for the lower (moving) element the highest stresses occur over the support mechanism for said nozzle and being greatest at the central transverse axis over the loading mechanism. In the classical "T" form of a pouring nozzle these support forces create a highly stressed zone between the support surface and the pouring channel along which a crack may propagate from the exterior to the bore (pouring channel) of the tube section under the support flange (the plate like member).
  • the invention in its most general embodiment relates to a pouring nozzle made of at least one refractory material and comprising a tubular member defining a first part of a pouring channel and a plate like member integral with said tubular member and projecting from the tubular member along its periphery at the one end, said plate like member having an orifice defining a second part of said pouring channel and a flat surface at its free end, which flat surface running perpendicular to a longitudinal axis of said pouring channel, at least part of the plate like member and/or of the tubular member being encapsulated by a metallic envelope, wherein at least one stiffening element is arranged within the refractory material of said plate like member, between said plate like member and the metallic envelope or protruding from said metallic envelope into the said plate like member.
  • the design configuration of the external encapsulation facilitates introduction of integral stiffening within the support can.
  • the extra rigidity provided by such integral, internal stiffening elements introduces the potential to absorb the point loading forces from a corresponding support mechanism and distribute any such forces evenly across a wide area of the encapsulated refractory ceramic material and thereby onto the head and tubular regions of the nozzle.
  • the pouring nozzle comprises two stiffening elements, arranged at opposite ends of said plate like member.
  • the plate like member is shaped as a parallelepiped, especially when used within a sliding gate arrangement. It then comprises two (of four) opposite support flanges against which the support mechanism acts.
  • the stiffening elements may have various shapes. They can be shaped as a rod, as a helical spring, as a bar or the like.
  • the plate like member may have the shape of a ring.
  • the stiffening element may be arranged between the refractory ceramic material and the metallic envelope (alternative 1).
  • the reinforcement member is part of the metallic envelope and arranged like a flange along the inner wall of said envelope. All these three embodiments will be further disclosed by examples hereinafter.
  • the stiffening element may be arranged such that one of its surfaces forms part of the flat surface of the plate like member. It is then preferably arranged at the outer periphery of the flat surface of the plate like member. This minimizes the risk of any deflection in the outer peripheral region of the plate like member according to figure 1 .
  • a shock absorbing interface zone may be arranged between the basic (inner) refractory material and the stiffening element(s) and/or the (outer) metallic envelope.
  • Said shock absorbing interface zone may be made of a second refractory material which becomes deformable at temperatures experienced during use of said pouring nozzle in metal casting.
  • the inventive concept may be applied to pouring nozzles of a strong T-shape, i. e. nozzles comprising a plate like region the supporting surfaces of which running more or less parallel to the flat surface at their free end.
  • the concept may as well be applied to nozzles according to figure 3 of EP 1 133 373 B1 (identical to nozzles according to EP 1 590 114 B1 ) comprising bearing surfaces (opposite the free flat surface) which bearing surfaces form an angle unequal 90° with the longitudinal axis of the pouring channel.
  • part(s) of the stiffening element(s) form part of the chamfered surface sections (bearing surfaces).
  • the stiffening element(s) may be made of any material improving the manufacturing, use or exchange of a pouring nozzle for metal casting.
  • One of the most favourite materials is metal but a ceramic of high modulus of rupture may be favourite as well.
  • Figure 1 shows an inner nozzle 10 and an outer nozzle 12 of a generally T-shaped design with flanges of similar geometric design but both nozzles 10, 12 could as well be characterised by identical designs.
  • Nozzle 12 of figure 2 comprises a tubular region 12t defining a first part of pouring channel 14.
  • Said tubular part 12t is made from a common refractory ceramic material and is integral with a plate like region 12p following upwardly.
  • Said plate like region 12p is of larger cross sectional area than part 12t and comprises an inner part 12pi made of the same refractory material as tubular member 12t and two metallic parts 12pm running alongside two opposite sides of the inner part 12pi. While the inner surfaces of the metallic parts 12pm are touching the corresponding outer surface areas of the refractory part 12pi the outer surfaces of part 12m are in contact with an envelope 16, as described hereinafter.
  • Said plate like member 12p provides a flat upper surface 12s at its free end (opposite tubular part 12t) which surface 12s being defined by a combination of corresponding surfaces of the refractory part 12pi and said two metal reinforcement inserts 12pm, presenting stiffening elements.
  • the said stiffening elements are characterised by an upper vertical outer surface 12pmo, followed by an inclined surface portion 12pmi while the respective inner walls are running vertical from upper surface 12s to the respective lower ends.
  • a metallic can 16 encapsulates the plate like member 12p and the annexed area of tubular member 12t.
  • the longitudinal axis of this nozzle 12 is marked as "L”.
  • nozzle 12 of figure 1 When nozzle 12 of figure 1 is replaced by one incorporating the design shown in figure 2 with the integral stiffening members, the temperature conditions arising from service again generate a differential thermal deflection across the plate surface 12s. However the said stiffening elements 12pm bear the pressures from the closing mechanism and prevent them from establishing any bending stress moment across the refractory material of the nozzle 12.
  • nozzle 12 according to figure 2 provides the further advantage that its chamfered bearing surfaces, provided by the can sections opposite surface sections 12pmi present increased mechanical stability because the stiffening elements 12pm are arranged directly behind this bearing surfaces.
  • a similar effect may be achieved by a pouring nozzle 12 according to figure 4 which differs from that of figure 2 just in the arrangement of said two stiffening elements 12pm.
  • Both stiffening elements 12pm are designed as rods (bars) and placed within the refractory ceramic material of plate like member 12p, i.e. they are fully surrounded by said refractory material.
  • the respective cross sectional area is adapted to the outer design of plate like member 12p.
  • Especially said stiffening element 12pm provides inclined lower surface sections 12pmi running parallel to corresponding inclined bearing surfaces 16b of metal can 16.
  • Figure 3 represents a pouring nozzle 10 used as an inner nozzle according to inner nozzle 10 of figure 1 .
  • Nozzle 10 again comprises a tubular part 10t followed (here: at its lower end) by a plate like part 10p.
  • the transition area between tubular part 10t and plate like part 10p is marked as "T”.
  • Figure 3 shows that tubular part 10t is - at its lower end - surrounded by a sleeve 18, made of a refractory material different to that of part 10t.
  • This sleeve 18 continues around the plate like member 10p and in turn is encapsulated by an outer metallic envelope 16 which ends shortly before the free and flat surface area 10s at the lower end of nozzle 10.
  • a shock absorbing interface layer "S" made from a material which becomes deformable at the temperatures experienced during use of said pouring nozzle, may be introduced between the refractory pouring nozzle element 10p and the second surrounding refractory sleeve 18.
  • can 16 Following the shape of sleeve 18 can 16 is characterised by a cylindrical part at its upper end, followed by an inclined (outwardly extending) portion 16b and an outwardly extending horizontal part 16h followed by a final vertically running portion 16v.
  • That part of envelope 16 provided by horizontal part 16h and vertical portion 16v is mechanically reinforced by two stiffening elements 10pm, protruding from opposing inner wall of envelope 16.
  • Both of said stiffening elements are designed as rods with a rectangular square section. They are replacing part of encapsulating material of sleeve 18.
  • the refractory material of tubular part 10t extends into the area of plate like member 10p and is characterised by an outwardly tapered portion 10pi providing the inner part of surface section 10s around the pouring channel 14.
  • the two metal bars 10pm again act as stiffening elements similar to stiffening elements in figures 2 . According to the embodiment of figure 3 theses stiffening elements 10pm are integral part of the outer metallic envelope 16.
  • the shape of the can and any adjacent stiffening means like 12pm or 10pm in any of the embodiments shown may have a profile suited to any specific mechanism configuration.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Continuous Casting (AREA)
  • Supply Of Fluid Materials To The Packaging Location (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Nozzles (AREA)
  • Glass Compositions (AREA)
  • Resistance Heating (AREA)
  • Lift Valve (AREA)

Claims (14)

  1. Gießrohr aus mindestens einem feuerfesten Material, welches ein rohrförmiges Teil (10t, 12t) umfasst, welches einen ersten Abschnitt eines Gießkanals (14) bildet und ein plattenförmiges Teil (10p, 12p), das mit dem rohrförmigen Teil (10t, 12t) integral ist und von dem rohrförmigen Teil (10t, 12t) umfangsseitig an einem Ende absteht, wobei das plattenförmige Teil (10p, 12p) eine Öffnung aufweist, die einen zweiten Abschnitt des Gießkanals (14) bildet sowie eine flache Oberfläche (10s, 12s) an seinem freien Ende, und die flache Oberfläche (10s, 12s) senkrecht zu einer Längsachse (L) des Gießkanals (14) verläuft, wobei mindestens ein Abschnitt des plattenförmigen Teils (10p,12p) und/oder des rohrförmigen Teils (10t, 12t) von einer metallischen Umhüllung (16) eingefasst ist, und mindestens ein Versteifungselement (10pm, 12pm) zwischen dem genannten plattenförmigen Teil (10p, 12p) und der metallischen Umhüllung (16) verläuft oder Teil der metallischen Umhüllung ist und flanschartig entlang der Innenwand der metallischen Umhüllung (16) verläuft.
  2. Gießrohr nach Anspruch 1 mit zwei Versteifungselementen (10pm, 12pm), die auf gegenüberliegenden Seiten des genannten plattenförmigen Teils (10p, 12p) angeordnet sind.
  3. Gießrohr nach Anspruch 1, dessen Versteifungselement die Form eines Stabes aufweist.
  4. Gießrohr nach Anspruch 1, dessen Versteifungselement die Form einer Spirale aufweist.
  5. Gießrohr nach Anspruch 1, dessen Versteifungselement die Form eines Rings besitzt.
  6. Gießrohr nach Anspruch 1, dessen Versteifungselement (10pm) Teil der Umhüllung (16) ist, wobei das Versteifungselement (10pm) von der inneren Wand der Umhüllung in das feuerfeste Material des plattenförmigen Teils (10p) vorsteht.
  7. Gießrohr nach Anspruch 1, dessen Versteifungselement (12pm) so angeordnet ist, dass eine seiner Oberflächen einen Teil der flachen Oberfläche (12s) des plattenförmigen Teils (12p) bildet.
  8. Gießrohr nach Anspruch 7, dessen Versteifungselement (12pm) an der äußeren Peripherie der flachen Oberfläche (12s) des plattenförmigen Teils (12p) verläuft.
  9. Gießrohr nach Anspruch 1, wobei abgeschrägte Oberflächenabschnitte des plattenförmigen Teils, der flachen Oberfläche gegenüberliegend, einen Winkel α zwischen 20 und 85° mit der Längsachse (L) des Gießkanals bilden.
  10. Gießrohr nach Anspruch 9, bei dem (ein) Abschnitt(e) des Versteifungselementes/der Versteifungselemente Teil der schrägen Oberflächenabschnitte bildet (bilden).
  11. Gießrohr nach Anspruch 1 mit einer zweiten feuerfesten Zone (18) zwischen der Umhüllung (16), dem/den Versteifungselement(en) (10pm) und dem plattenförmigen Teil (10p).
  12. Gießrohr nach Anspruch 11 mit einer schockabsorbierenden Zwischenzone (S) zwischen Zone (18) und plattenförmigem Teil (10p) aus einem feuerfesten Material, das bei Temperaturen deformierbar wird, die bei der Benutzung des Gießrohrs herrschen.
  13. Gießrohr nach Anspruch 1 mit mindestens einem metallischen Versteifungselement (10pm, 12pm).
  14. Gießrohr nach Anspruch 1 mit mindestens einem hochdichten keramischen Versteifungselement (10pm, 12pm).
EP06014520A 2006-07-13 2006-07-13 Tauchrohr Not-in-force EP1878519B1 (de)

Priority Applications (13)

Application Number Priority Date Filing Date Title
ES06014520T ES2300084T3 (es) 2006-07-13 2006-07-13 Boquilla de colada.
DE602006000598T DE602006000598T2 (de) 2006-07-13 2006-07-13 Gießrohr
EP06014520A EP1878519B1 (de) 2006-07-13 2006-07-13 Tauchrohr
AT06014520T ATE387276T1 (de) 2006-07-13 2006-07-13 Tauchrohr
PL06014520T PL1878519T3 (pl) 2006-07-13 2006-07-13 Wylew kadziowy
BRPI0713922-5A BRPI0713922A2 (pt) 2006-07-13 2007-06-15 válvula de lingotamento
MX2009000332A MX2009000332A (es) 2006-07-13 2007-06-15 Boquilla surtidora.
RU2008152194/02A RU2393054C1 (ru) 2006-07-13 2007-06-15 Разливочный стакан
UAA200900173A UA93916C2 (en) 2006-07-13 2007-06-15 Pouring nozzle
PCT/EP2007/005271 WO2008006438A1 (en) 2006-07-13 2007-06-15 Pouring nozzle
CNA2007800263096A CN101547761A (zh) 2006-07-13 2007-06-15 浇注喷嘴
US12/305,366 US20090173757A1 (en) 2006-07-13 2007-06-15 Pouring nozzle
ZA200900015A ZA200900015B (en) 2006-07-13 2009-01-05 Pouring nozzle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06014520A EP1878519B1 (de) 2006-07-13 2006-07-13 Tauchrohr

Publications (2)

Publication Number Publication Date
EP1878519A1 EP1878519A1 (de) 2008-01-16
EP1878519B1 true EP1878519B1 (de) 2008-02-27

Family

ID=37460121

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06014520A Not-in-force EP1878519B1 (de) 2006-07-13 2006-07-13 Tauchrohr

Country Status (13)

Country Link
US (1) US20090173757A1 (de)
EP (1) EP1878519B1 (de)
CN (1) CN101547761A (de)
AT (1) ATE387276T1 (de)
BR (1) BRPI0713922A2 (de)
DE (1) DE602006000598T2 (de)
ES (1) ES2300084T3 (de)
MX (1) MX2009000332A (de)
PL (1) PL1878519T3 (de)
RU (1) RU2393054C1 (de)
UA (1) UA93916C2 (de)
WO (1) WO2008006438A1 (de)
ZA (1) ZA200900015B (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MX2015002196A (es) * 2012-09-11 2015-05-08 Refractory Intellectual Prop Dispositivo refractario de colada.
CN104249210A (zh) * 2013-06-28 2014-12-31 鸿富锦精密工业（深圳）有限公司 多点焊治具
JP6122393B2 (ja) * 2014-02-25 2017-04-26 黒崎播磨株式会社 浸漬ノズル
EP3140066B1 (de) * 2014-05-05 2018-07-04 Refractory Intellectual Property GmbH & Co. KG Feuerfeste keramische giessdüse
UA123573U (uk) * 2017-11-10 2018-02-26 Товариство З Обмеженою Відповідальністю "Шеффілд Рефракторіс Україна" Стакан-дозатор для розливання металів і сплавів

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62124071A (ja) * 1985-11-21 1987-06-05 Nippon Steel Corp 溶融金属注入用ノズル
JPH11104793A (ja) * 1997-10-02 1999-04-20 Akechi Ceramics Kk 連続鋳造用ロングノズル
BE1013024A3 (fr) * 1998-12-15 2001-08-07 Internat Ind Engineering S A Tube de coulee.
JP3506655B2 (ja) * 2000-04-28 2004-03-15 明智セラミックス株式会社 連続鋳造ノズル

Also Published As

Publication number Publication date
BRPI0713922A2 (pt) 2012-11-27
ES2300084T3 (es) 2008-06-01
DE602006000598T2 (de) 2009-03-26
ATE387276T1 (de) 2008-03-15
DE602006000598D1 (de) 2008-04-10
EP1878519A1 (de) 2008-01-16
WO2008006438A1 (en) 2008-01-17
ZA200900015B (en) 2009-12-30
PL1878519T3 (pl) 2008-06-30
MX2009000332A (es) 2009-01-29
RU2393054C1 (ru) 2010-06-27
CN101547761A (zh) 2009-09-30
UA93916C2 (en) 2011-03-25
US20090173757A1 (en) 2009-07-09

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