EP1453626B1 - Poche de coulee pour produire une barre metallique de grande purete - Google Patents

Poche de coulee pour produire une barre metallique de grande purete Download PDF

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Publication number
EP1453626B1
EP1453626B1 EP02792874A EP02792874A EP1453626B1 EP 1453626 B1 EP1453626 B1 EP 1453626B1 EP 02792874 A EP02792874 A EP 02792874A EP 02792874 A EP02792874 A EP 02792874A EP 1453626 B1 EP1453626 B1 EP 1453626B1
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EP
European Patent Office
Prior art keywords
tundish
melt
interior space
refractory
lined
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.)
Revoked
Application number
EP02792874A
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German (de)
English (en)
Other versions
EP1453626A2 (fr
Inventor
Markus Brummayer
Gerald Eckerstorfer
Gerald Hohenbichler
Heinz Hödl
Karl Mörwald
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.)
Primetals Technologies Austria GmbH
Original Assignee
Voest Alpine Industrienlagenbau GmbH
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Publication date
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Application filed by Voest Alpine Industrienlagenbau GmbH filed Critical Voest Alpine Industrienlagenbau GmbH
Priority to SI200230319T priority Critical patent/SI1453626T1/sl
Priority to AT02792874T priority patent/ATE318194T1/de
Publication of EP1453626A2 publication Critical patent/EP1453626A2/fr
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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
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/14—Plants for continuous casting
    • B22D11/147—Multi-strand plants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10—Supplying or treating molten metal
    • 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
    • B22D41/08—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like for bottom pouring

Definitions

  • the invention relates to an intermediate vessel with a refractory lining for the production and transfer of molten metal of high purity from a ladle into the mold of a continuous casting plant.
  • an intermediate vessel is usually inserted between the ladle and the continuous casting mold in order to compensate for fluctuations in the supply of melt and at the withdrawal speed of the metal strand from the continuous casting plant.
  • the transfer of the melt from the tundish into the mold of a continuous casting plant is usually carried out by a drain opening in the tundish bottom, which is associated with a controllable closure member such as a slide or a stopper, and further by a submersible pouring tube or a pouring nozzle.
  • the mold may be of various types, for example an oscillating tube or plate mold, a mold formed by a single casting roll or two co-operating casting rolls and side plates or a mold formed by circumferential bands or beads.
  • this intermediate vessel is designed as a distribution vessel and supplies several juxtaposed Schmelzenauslässe several juxtaposed continuous casting molds.
  • V-shaped distribution vessels are known.
  • the tundish usually also serves to calm the molten metal flowing from the ladle and, during the residence time of the molten metal in the tundish, is intended to enable the separation of slag particles and other non-metallic inclusions. To ensure this to a sufficient extent, the flow behavior of the molten metal is often due to flow-conducting internals in the Intermediate vessel specifically influenced.
  • Such shaped trough-shaped intermediate vessels are already known, for example, from EP-B 804 306 and EP-A 376 523.
  • liquid steel from the ladle is introduced via a shadow tube in a distribution or intermediate vessel.
  • the induced steel jet flows in the direction of the intermediate vessel bottom and there impinges on the flat bottom of the intermediate vessel or a device for the flow deflection which deflects the liquid jet in the direction of the bath mirror surface and removes kinetic energy by dissipation.
  • the flow usually returns to the surface of the bath mirror, migrates along it and emerges again along the narrow rear wall and along the side walls of the trough-shaped intermediate vessel.
  • the foreign substances in the molten metal to be separated as efficiently as possible come from the steelmaking process and are flushed out of the ladle into the intermediate vessel when the molten metal is transferred.
  • foreign substances are also introduced into the molten metal in the tundish. These come from the refractory lining material of the tundish or from the most commonly used liquid steel cover slag and are on the one hand eroded and flooded by mechanical erosion due to wall shear stresses or by chemical erosion due to reoxidation.
  • slag inclusions arise due to resuspension because of high bath mirror velocities and increased surface turbulence.
  • the object of the present invention is therefore to avoid the disadvantages described and to propose an intermediate vessel for producing a metal strand, in which the particle introduction into the molten metal within the intermediate vessel is minimized and, overall, the highest possible Separation rate of all inclusions contained in the molten metal is achieved and so the mold is fed a melt with the highest possible purity.
  • these values for the dimensionless ratio ⁇ are between 3.83 and 4.2.
  • the dimensionless ratio ⁇ which defines a volumetric wetting degree, indicates that the contact surface between lining and molten metal should be kept as small as possible in relation to the amount of molten metal in the intermediate vessel. At the same time, however, it must not be disregarded that a corresponding separation surface is necessary for maximum particle separation. Analyzes of various types of intermediate vessels have shown that optimum particle separation rates can be achieved with vessel shapes in which the ratio ⁇ lies in the claimed range.
  • a high particle separation occurs when, in addition, the bricked-up interior of the tundish as a function of the operating-Badador Why (h) satisfies the condition that the ratio ( ⁇ ) of the free surface (A Top ) to the wet molten surface of the molten metal surface (A ref ) is between 0.45 and 1.0.
  • the dimensionless ratio ⁇ which relates the free surface, which acts as a particle deposition surface, to the wetted lining surface, referred to as Particle generation surface acts, can be seen that in the preferred range, a balance in the opposite effects occurs.
  • a favorable particle separation rate sets in at a ratio ⁇ between 0.5 and 0.8.
  • ⁇ and ⁇ values determined above do not take into account additional intermediate vessel installations such as flow deflectors, weirs etc.
  • the operating bath level is between 0.5 m and 1.5 m.
  • the requirement for high particle separation from the molten metal in the tundish is ensured in sequence casting during the phase of ladle change, if the filling volume of the interior of the tundish contains at least 5 times, preferably at least 7 times the amount of molten metal per minute in normal operation is shed.
  • the filling volume of the interior of the tundish is at least 0.75m 3 , but preferably at least 1.0 m 3 . This ensures a sufficient residence time of the melt in the tundish at casting rates of 60 to 100 t steel / h. For higher casting rates, higher minimum volumes are recommended.
  • Preferred forms of the tundish arise when the bricked interior of the tundish is formed essentially by a generator rotating about a vertical vessel axis. This creates rotationally symmetrical vessel interiors.
  • the optimum shape which for a given tundish volume has a maximum surface area for the deposition of inclusions in the bath covering slag and at the same time forms a minimal molten metal wetted attack surface for mechanical and chemical erosion, is formed by a hemisphere or a hemisphere segment.
  • tundish arise when the tundish at least partially has a hemispherical, frusto-conical, nadoloidförmigen or cylindrical interior and in this case the cross section of the tundish interior is at least partially circular or elliptical formed in a normal plane to the vertical vessel axis cutting plane.
  • a dip tube projecting into the intermediate vessel is provided for the supply of melt, a flow guide and the outlet opening at the intermediate vessel bottom below the dip tube a flow guide and the outlet at a location of the tundish bottom spaced from the flow guide and at least half the bottom diameter arranged.
  • the intermediate vessel according to the invention can also be operated in short-circuit operation, whereby in particular the entry of harmful particles from the Swissgefäßausmautation is kept low.
  • Short-circuit operation is understood to mean a procedure in which the molten metal flowing from the ladle into the intermediate vessel or the interior of an intermediate vessel flows through it over a short path and out through the outlet opening of the intermediate vessel or the interior of the intermediate vessel.
  • a flow path in this interior in which a large proportion of the inflowing molten metal is not subject to Umisselzströmungen in the tundish, but undergoes little flow deflections on the largely direct path from the melt inlet to the melt outlet. This is achieved by setting the horizontal distance between the molten metal jet entering the melt volume substantially vertically and the molten metal jet emerging essentially vertically from the melt volume to less than half the bottom diameter of the interior space.
  • the intermediate vessel comprises a melt feed basin and at least one melt-discharge basin, each melt discharge basin by a transport channel, preferably an overflow, is separated from the melt supply tank and each melt-discharge basin defines an interior of the intermediate vessel.
  • This type of intermediate vessel in which the melt flows through two tanks arranged in series, not only spatially but also structurally separates the region of the melt feed from the casting ladle from the region of the melt discharge into the mold and thus allows an additional continuity in the flow behavior.
  • the connection area between the melt supply basin and the melt discharge basin can be provided by an overflow or by a transport channel, which can also be arranged below the bath level.
  • the above-described geometric conditions for the design of the interior must be fulfilled at least by the melt discharge basin.
  • a reduction in the introduction of foreign substances from the lining of the tundish is additionally contributed if the melt supply basin delimits an interior of the tundish and satisfies the conditions of the dimensionless ratio ( ⁇ ) and optionally also the dimensionless ratio ( ⁇ ).
  • the melt feed basin is a Flow control arm and the melt discharge basin is at least one outlet opening zugeorgnet.
  • the tundish is supported on a preferably lifting and / or tilting distribution van having a traction drive and on a roadway between an operating position and a Waiting position procedure is formed.
  • FIG. 1 the arrangement of an inventive tundish 1 in its operating position between a ladle 2 and a mold 3 in a continuous casting plant, which is indicated by the mold 3 and the outflowed from her casting 13, shown schematically.
  • the ladle 2 is deposited in fork arms 4 of a ladle turret, which is indicated by the vertical turret axis 5.
  • a submersible pouring tube 6, which adjoins the outlet opening 7 of the ladle 2 and projects into the intermediate vessel 1, flows molten metal from the ladle 2 into the intermediate vessel 1 and exits there below the bath level 8. From here, the molten metal is passed through an outlet opening 9 and another immersion pouring tube 10 into the mold 3 and exits there below the mold bath level 11.
  • the melt flow in the immersion casting tube 10 is controlled by a controllable closure member 12, for example a slide.
  • a controllable closure member 12 for example a slide.
  • the molten metal solidifies into a cast strand 13, which is continuously conveyed out in a roll guide, not shown, of a continuous casting plant.
  • the tundish 1 consists, as shown in FIGS. 2a and 2b, of a steel tub 15, which forms an outer stable vessel frame and a refractory lining 16 as an insulating layer whose inner surface forms the contact surface to the molten metal 17 and forms the interior 14 of the tundish.
  • the intermediate vessel wall 19 protrudes upwards about a vertical vessel axis 20 and forms a spherical-segment-shaped interior space 14.
  • the interior space 14 is geometrically formed by a generator E rotating at a constant distance r around the vertical vessel axis 20.
  • a Flow guide 21 is arranged below the immersion casting tube 6.
  • a filling volume (V) is filled in the interior 14 of the intermediate vessel 1, wherein the free surface (A Top ) of the molten metal forms the bath level 8, which is at the operating level of the bath level (h) and covered by a slag layer 22 is, in which from the molten metal continuously foreign particles are deposited.
  • the intermediate vessel 1 a portion of the surface of the refractory lining 16 is wetted by molten metal 17 and this wetted bricked surface (A ref ) is exposed to particularly high thermal stress and chemical and mechanical erosion. Particles are continuously flushed out of the lining 16 into the molten metal 17 and released again with the melt flow at the transition to the dead zone 22.
  • FIGS. 3a and 3b show a further embodiment of a possible intermediate vessel, in which each cross-sectional area normal to the vertical vessel axis 20 is formed by an ellipse as can be seen in the plan view.
  • the inner contour results geometrically by rotation of a generatrix (E) around the vertical vessel axis 20, wherein the radius distance (r) of the generatrix of the vertical vessel axis as a function of the rotation angle ( ⁇ ) varies.
  • the flow guide 21 and the outlet opening 9 are as far away as possible from each other to create favorable flow conditions in the interior 14 and to ensure a high P sieabscheiderate.
  • the intermediate vessel may also be formed by a plurality of receiving tanks for molten metal.
  • FIGS. 4a and 4b show in plan and elevation an intermediate vessel or distribution vessel for a two-strand casting installation, wherein the two casting taps 23 are indicated by dashed lines.
  • the intermediate vessel is formed in plan V-shaped by three contiguous receiving basin.
  • a Schmetzen feed basin 25 is centrally located and connected to two melt diverters 26 to form a unit.
  • a flow guide 21 is embedded in the bottom of the refractory lining.
  • the intermediate vessel is in this case, as shown in Fig. 1, during operation so positioned that the immersion nozzle 6 of the ladle 2 is located exactly above the flow control arm 21.
  • Each melt discharge basin 26 is penetrated at the bottom of the vessel by an outlet opening 9, which is positioned above the mold 3 in the casting operation.
  • the submersible pouring tube 10 adjoining the outlet opening 9 projects into the mold cavity of the mold 3.
  • the vertical section through the intermediate vessel along the line AB shows an overflow 27 formed by a refractory lining between the melt feed basin 25 and the melt drainage basin 26.
  • the bath level 8 of the molten metal 17 projects beyond the overflow 27, so that the molten metal pre-soaked in the melt feed basin 25 can flow in a slow flow into the melt discharge basin 26 and there can be further particle separation before the molten metal flows through the outlet opening 9 into the continuous casting mold 3 ,
  • Both the melt supply tank 25 and the two melt discharge basins 26 form a spherical segment-shaped interior 14.
  • the intermediate vessel according to the invention is height-adjustable and possibly also tiltably supported on a distribution truck 30 by means of lifting and / or tilting devices 31 and between an operating position in which the immersion casting tube protrudes into the mold. and a maintenance position in which the intermediate vessel is heated and prepared for its use, usually rail-bound on a roadway 32 movable (Fig. 5).
  • the distribution truck 30 is equipped with a travel drive 33.
  • the intermediate vessel is usually closed with a lid to largely prevent cooling of the melt by thermal radiation. If necessary, additional internals are possible in the tundish, which favorably influence the melt flow.
  • the passing of the molten metal between the adjacent melting tanks can also be done below the bath level of the filled melts through one or more tubular transport channels, with the advantage that the slag layer is subject to a flow movement only to a very small extent.
  • FIG. 6 clearly shows the short-circuit operation already described above on the intermediate vessel.
  • the molten metal flows through the immersion nozzle 6 of the ladle into the interior 14 and flows on a short path, which is indicated by flow lines 35, to the outlet opening 9 and leaves there again the intermediate vessel.
  • the horizontal distance H between the entering in the vertical direction in the interior 14 and also again in the vertical direction from the interior 14 emerging molten metal is less than half the diameter d of the tundish 18th

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Claims (14)

  1. Panier de coulée doté d'une maçonnerie réfractaire (16), pour la préparation et le transfert de métal en fusion, de préférence de l'acier en fusion, de haute pureté, depuis une poche de coulée (2) jusque la lingotière (3) d'une installation de coulée continue, caractérisé en ce que pour une hauteur (h) du niveau du bain en fonctionnement, l'espace intérieur (14) maçonné du panier de coulée (1) satisfait la condition que le rapport sans dimension (κ) entre la surface maçonnée (Aref) mouillée par le métal en fusion et le volume de remplissage (V) délimité par cette surface maçonnée et la surface libre (ATop), qui dépend de la hauteur du niveau du bain, et défini par la relation κ = A ref ( V ) 2 3
    Figure imgb0006
     est compris entre 3,83 et 4,39.
  2. Panier de coulée selon la revendication 1, caractérisé en ce que le rapport sans dimension (κ) est compris entre 3,83 et 4,20.
  3. Panier de coulée selon les revendications 1 ou 2, caractérisé en ce que l'espace intérieur (14) maçonné du panier de coulée satisfait, pour la hauteur (h) du bain en fusion en fonctionnement, la condition que le rapport (ζ) entre la surface libre (ATop) et la surface maçonnée (Aref) mouillée par le métal en fusion est compris entre 0,4 et 1,0.
  4. Panier de coulée selon la revendication 3, caractérisé en ce que le rapport (ζ) est compris entre 0,5 et 0,8.
  5. Panier de coulée selon l'une des revendications précédentes, caractérisé en ce que le volume de remplissage (V) de l'espace intérieur (14) du panier de coulée est d'au moins 0,75 m3 et de préférence d'au moins 1,0 m3.
  6. Panier de coulée selon l'une des revendications précédentes, caractérisé en ce que l'espace intérieur maçonné (14) du panier de coulée est essentiellement formé d'une génératrice (E) qui tourne autour d'un axe vertical (20) du panier.
  7. Panier de coulée selon l'une des revendications précédentes, caractérisé en ce que l'espace intérieur maçonné (14) du panier de coulée est essentiellement formé par une génératrice (E) qui tourne autour d'un axe vertical (20) du panier et qui présente une distance variable, de préférence pulsée harmoniquement, par rapport à l'axe vertical (20) du panier.
  8. Panier de coulée selon l'une des revendications précédentes, caractérisé en ce que le panier de coulée présente au moins par parties un espace intérieur (14) en forme de demi-sphère, de tronc de cône, de paraboloïde de révolution ou de cylindre.
  9. Panier de coulée selon la revendication 7, caractérisé en ce que dans un plan de coupe perpendiculaire à l'axe vertical (20) du panier, au moins certaines parties de la section transversale de l'espace intérieur (14) du panier de coulée ont une forme circulaire ou elliptique.
  10. Panier de coulée selon l'une des revendications précédentes, caractérisé en ce qu'un tube immergé (6) qui pénètre dans le panier de coulée (1) est prévu pour l'amenée du bain en fusion, en ce qu'un dispositif (21) de déviation d'écoulement est prévu dans le fond (18) du panier de coulée en dessous du tube immergé (6) et en ce que l'ouverture de soutirage (9) est disposée en un emplacement du fond (18) du panier de coulée écarté du dispositif (21) de déviation d'écoulement d'une distance (d) qui est d'au moins la moitié du diamètre du fond.
  11. Panier de coulée selon l'une des revendications précédentes, caractérisé en ce que le panier de coulée (1) comporte une cuve (25) d'amenée du bain en fusion et au moins une cuve (26) de soutirage du bain en fusion, en ce que chaque cuve (26) de soutirage du bain en fusion est séparée de la cuve (25) d'amenée du bain en fusion par un canal de transport, de préférence une surverse (27), et en ce que chaque cuve (26) de soutirage du bain en fusion délimite un espace intérieur (14) du panier de coulée (1).
  12. Panier de coulée selon la revendication 11, caractérisé en ce que la cuve (25) d'amenée de bain en fusion délimite l'espace intérieur (14) du panier de coulée.
  13. Panier de coulée selon les revendications 11 ou 12, caractérisé en ce qu'un dispositif (21) de déviation d'écoulement est associé à la cuve (25) d'amenée de bain en fusion et en ce qu'une ouverture de soutirage (9) est associée à la cuve (26) de soutirage du bain en fusion.
  14. Panier de coulée selon l'une des revendications précédentes, caractérisé en ce que le panier de coulée est soutenu sur un chariot de répartition (30) qui présente de préférence des dispositifs (31) de relèvement et/ou de basculement et un entraînement de déplacement (33) et qui est configuré de manière à pouvoir se déplacer sur une piste de déplacement (32) entre une position de fonctionnement et une position d'attente.
EP02792874A 2001-12-14 2002-12-04 Poche de coulee pour produire une barre metallique de grande purete Revoked EP1453626B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI200230319T SI1453626T1 (sl) 2001-12-14 2002-12-04 Vmesna posoda za izdelavo kovinske gredice vecje cistoce
AT02792874T ATE318194T1 (de) 2001-12-14 2002-12-04 Zwischengefäss zur herstellung eines metallstranges hoher reinheit

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT0196101A AT411024B (de) 2001-12-14 2001-12-14 Zwischengefäss und verfahren zur herstellung eines metallstranges hoher reinheit
AT19612001 2001-12-14
PCT/EP2002/013687 WO2003051560A2 (fr) 2001-12-14 2002-12-04 Panier de coulee et procede pour produire une barre metallique de grande purete

Publications (2)

Publication Number Publication Date
EP1453626A2 EP1453626A2 (fr) 2004-09-08
EP1453626B1 true EP1453626B1 (fr) 2006-02-22

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EP02792874A Revoked EP1453626B1 (fr) 2001-12-14 2002-12-04 Poche de coulee pour produire une barre metallique de grande purete

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US (1) US7108048B2 (fr)
EP (1) EP1453626B1 (fr)
JP (1) JP2005511321A (fr)
KR (1) KR101003940B1 (fr)
CN (1) CN1273247C (fr)
AT (1) AT411024B (fr)
AU (1) AU2002358590B2 (fr)
BR (1) BR0214948A (fr)
CA (1) CA2470022A1 (fr)
DE (1) DE50205885D1 (fr)
MX (1) MXPA04005703A (fr)
PL (1) PL370528A1 (fr)
RU (1) RU2004121465A (fr)
WO (1) WO2003051560A2 (fr)
ZA (1) ZA200404536B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20031356A1 (it) 2003-07-02 2005-01-03 Danieli Off Mecc Dispositivo di alimentazione di metallo fuso in cristallizzatore.
AT413084B (de) 2003-12-02 2005-11-15 Voest Alpine Ind Anlagen Sequenzgiessverfahren zur herstellung eines gegossenen metallstranges hoher reinheit
DE102014119109B4 (de) * 2014-12-18 2018-12-13 Voestalpine Stahl Gmbh Verteiler für Stranggießanlagen

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3333746A (en) * 1966-05-19 1967-08-01 Harbison Walker Refractories Tundish ladles
JPS57115949A (en) * 1981-01-05 1982-07-19 Nippon Steel Corp Production of clean steel in continuous casting
IT1214396B (it) * 1984-05-08 1990-01-18 Centro Speriment Metallurg Paniera di colata continua con funzioni di reattore per trattamenti fuori forno
US4715586A (en) * 1987-02-18 1987-12-29 Bethlehem Steel Corporation Continuous caster tundish having wall dams
US4995592A (en) * 1988-12-22 1991-02-26 Foseco International Limited Purifying molten metal
KR960006043B1 (ko) * 1991-03-27 1996-05-08 가와사끼세이데쓰 가부시끼가이샤 용융금속의 비금속 개재물의 제거장치와, 그에 사용되는 전자 코일장치, 턴디시, 그의 이동장치 및, 이들 장치들을 이용한 주조방법
US5551672A (en) * 1995-01-13 1996-09-03 Bethlehem Steel Corporation Apparatus for controlling molten metal flow in a tundish to enhance inclusion float out from a molten metal bath
FI108852B (fi) * 2000-02-18 2002-04-15 Timo Jorma Juhani Lohikoski Jatkuvatoiminen menetelmä epäpuhtausaineen poistamiseksi

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Publication number Publication date
RU2004121465A (ru) 2006-01-10
EP1453626A2 (fr) 2004-09-08
US7108048B2 (en) 2006-09-19
WO2003051560A2 (fr) 2003-06-26
KR101003940B1 (ko) 2010-12-30
ZA200404536B (en) 2005-07-04
BR0214948A (pt) 2004-11-30
JP2005511321A (ja) 2005-04-28
US20050067134A1 (en) 2005-03-31
PL370528A1 (en) 2005-05-30
CN1273247C (zh) 2006-09-06
AU2002358590B2 (en) 2007-05-31
WO2003051560A3 (fr) 2004-01-29
CA2470022A1 (fr) 2003-06-26
ATA19612001A (de) 2003-02-15
MXPA04005703A (es) 2004-12-06
AU2002358590A1 (en) 2003-06-30
KR20040063173A (ko) 2004-07-12
AT411024B (de) 2003-09-25
CN1604828A (zh) 2005-04-06
DE50205885D1 (de) 2006-04-27

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