WO2009012994A1 - Dispositif de purification d'acier liquide - Google Patents

Dispositif de purification d'acier liquide Download PDF

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Publication number
WO2009012994A1
WO2009012994A1 PCT/EP2008/006081 EP2008006081W WO2009012994A1 WO 2009012994 A1 WO2009012994 A1 WO 2009012994A1 EP 2008006081 W EP2008006081 W EP 2008006081W WO 2009012994 A1 WO2009012994 A1 WO 2009012994A1
Authority
WO
WIPO (PCT)
Prior art keywords
tundish
projections
melt
use according
plate
Prior art date
Application number
PCT/EP2008/006081
Other languages
German (de)
English (en)
Inventor
Peter Schrader
Günter Böcking
Andreas Viertauer
Original Assignee
Pa-Ha-Ge Feuerfeste Erzeugnisse Gmbh & 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
Application filed by Pa-Ha-Ge Feuerfeste Erzeugnisse Gmbh & Co. Kg filed Critical Pa-Ha-Ge Feuerfeste Erzeugnisse Gmbh & Co. Kg
Publication of WO2009012994A1 publication Critical patent/WO2009012994A1/fr

Links

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
    • B22D11/10—Supplying or treating molten metal
    • B22D11/11—Treating the molten metal
    • B22D11/116—Refining the metal
    • B22D11/118—Refining the metal by circulating the metal under, over or around weirs
    • 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
    • B22D11/11—Treating the molten metal
    • B22D11/116—Refining the metal
    • B22D11/119—Refining the metal by filtering
    • 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
    • B22D41/003—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with impact pads

Definitions

  • the present invention relates to a weir plate for cleaning a molten steel in a tundish with the features of the preamble of claim 1.
  • the removal of non-metallic impurities from a molten steel is essential to the quality of the melt-cast billet or billet.
  • liquid steel is poured from a ladle into a tundish distributor (intermediate vessel), on the underside of which, in turn, a discharge opening for the melt is provided.
  • a tundish distributor intermediate vessel
  • a first removal of non-metallic impurities occurs already in that slags and other materials due to the lower density in the tundish rise to the surface, while the specific denser melt is present at the bottom disposed opening and runs there.
  • a weir divides the tundish into a first area into which the melt is filled and a second area containing the outlet.
  • a plate may be provided with flow openings and protrudes upward beyond the level of the melt.
  • the melt can run from the first region of the tundish, in which the material is filled, only through these openings or under the plate into the second region of the tundish, so that there is a limitation of the flow cross-section and thus a calming of the melt.
  • Non-metallic impurities remain in the area and are deposited especially on the surface which has flown over, but especially at the holes and around the holes.
  • the tundish weir plate has a textured, raised or dimpled surface, flow parallel to the surface is slowed down and non-metallic contaminants contained in the flow are likely to be deposited on the surface structure thus formed.
  • the built-in part is used in the form of a baffle plate or weir in the tundish, so that a forced flow from one side of the insert to the other side of the insert takes place.
  • the surface structure is then provided in particular near the openings through which flows on the side of the tundish into which the melt is introduced.
  • the structure is preferably formed by projections, in particular hemispherical projections or frustoconical projections.
  • the projections can also cuboid or cube-shaped, which is however more expensive to manufacture, especially during demolding.
  • a particularly preferred embodiment is a weir plate, which is installed trapezoidally over the cross section of the tundish and provided with flow openings.
  • the weir plate is made in a conventional manner from a refractory material.
  • Fig. 1 an insert in the form of a weir plate in a plan view
  • Fig. 2 the weir plate in a perspective view in cross section along the line II-II of Fig. 1; such as
  • FIG. 3 shows a weir plate according to the invention without flow openings.
  • FIG. 1 shows an insert in the form of a weir plate for a tundish.
  • the weir plate 1 has an upper side 2, a lower side 3 and two outer side surfaces 4 and 5. Together with a visible in Fig. 1 front 6 and a non-visible back 7, these surfaces define a substantially plane-parallel plate with trapezoidal shape.
  • the plate is designed so that it can be inserted into a tundish as a separation between two adjacent areas of the interior.
  • the outer shape is accordingly adapted to the specifications of the tundish, in which the plate is to be used.
  • the plate carries a number of through holes, indicated generally at 10.
  • the passage openings 10 have a circular cross-section and extend from the front side 6, which in operation is the flowed surface, to the back 7 of the plate.
  • a semicircular recess 11 is provided which represents a breakthrough between the front 6 and the back 7 in the region of the bottom 3.
  • the front side 6 of the plate 1 is provided with a structure comprising a plurality of frusto-conical projections 13.
  • the projections 13 are evenly distributed over the front side 6 of the plate. They rise above the front 6 and thus are in the installed position of the plate 1 in the tundish into the first area, which is bounded by the plate 1.
  • Fig. 2 shows a cross section along the line II-II of Fig. 1 in a perspective view.
  • the same components bear the same reference numbers.
  • the main body of the plate 1 has a uniform thickness throughout perpendicular to the front side 6, apart from the knob-shaped projections 13 which rise above this surface.
  • the plate 1 is made entirely of a refractory material, as is known in the art.
  • the plate 1 is installed in a tundish in such a manner that the front side 6 is aligned with the area in which the molten metal is filled.
  • the side facing away from the flow may be smooth or in any way fully or partially napped.
  • FIG. 3 shows an inventive weir plate in eienr embodiment without fürströmo réelleen. Otherwise, this weir plate corresponds to the embodiment shown in FIG.
  • the impurities are trapped on the surface structure 13, while the melt can flow under the weir plate due to the distance between the underside 3 of the weir plate 1.
  • the surface structure of the front side 6 can alternatively be configured differently. For example, it is not absolutely necessary for the projections 13 to be distributed over the entire surface. It is sufficient if a number of projections 13 are arranged around the passage openings 10 and the aperture 11, although the embodiment described is preferred.
  • the projections 13 may also have a different shape, for example, be hemispherical, cylindrical or truncated pyramidal.
  • the projections are oriented at right angles to the surface of the weir plate within the manufacturing accuracy.
  • the projections are then cuboid or cube-shaped. With this geometry, a particularly high degree of separation of non-metallic impurities is achieved.
  • the surface structure of the front side 6 may be formed so that no protrusions are formed, which extend beyond the plane of the front 6 addition, but that on the contrary recesses or indentations are provided, the depressions in the plane of the front 6 inside represent. Even such depressions slow the flow in the region of the openings 10 and 11. However, in this embodiment there is no "baffle surface" beyond the front side 6, which in the case of that described in FIGS Embodiment protrudes into the flow parallel to the front side 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Abstract

Un insert en matériau réfractaire pour un avant-creuset, comprenant lors de l'utilisation une surface en contact avec un métal en fusion, est amélioré pour l'élimination d'impuretés non métalliques car la surface est structurée par des reliefs et/ou des creux.
PCT/EP2008/006081 2007-07-26 2008-07-24 Dispositif de purification d'acier liquide WO2009012994A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE202007014729.5 2007-07-26
DE202007014729 2007-07-26
DE102007050467A DE102007050467A1 (de) 2007-07-26 2007-10-19 Vorrichtung zum Reinigen einer Stahlschmelze
DE102007050467.7 2007-10-19

Publications (1)

Publication Number Publication Date
WO2009012994A1 true WO2009012994A1 (fr) 2009-01-29

Family

ID=40157454

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/006081 WO2009012994A1 (fr) 2007-07-26 2008-07-24 Dispositif de purification d'acier liquide

Country Status (2)

Country Link
DE (1) DE102007050467A1 (fr)
WO (1) WO2009012994A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102000796B (zh) * 2010-08-27 2012-05-30 济南钢铁股份有限公司 中间包柱状多支流过滤器
WO2018231533A1 (fr) * 2017-06-12 2018-12-20 Southwire Company, Llc Dispositifs, systèmes et procédés d'élimination d'impuretés

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63207457A (ja) * 1987-02-20 1988-08-26 Asahi Glass Co Ltd タンデイツシユ用堰
US5018710A (en) * 1990-10-15 1991-05-28 Magneco/Metrel, Inc. Method and devices for removing alumina and other inclusions from steel contained in tundishes
US5064175A (en) * 1990-10-15 1991-11-12 Magneco/Metrel, Inc. Method and devices for removing alumina and other inclusions from steel contained in tundishes
US5088686A (en) * 1990-07-16 1992-02-18 Magneco/Metrel, Inc. Bubble pack plastic films as patterns for producing dimpled effects in cast ceramic pieces
WO1995006534A1 (fr) * 1993-08-28 1995-03-09 Foseco International Limited Purification de metal fondu
US5511766A (en) * 1993-02-02 1996-04-30 Usx Corporation Filtration device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5935614A (ja) 1982-08-21 1984-02-27 Kobe Steel Ltd 溶鋼中の非金属介在物を「ろ」過し浮上させる方法および装置
JPH07268437A (ja) 1994-03-31 1995-10-17 Kawasaki Steel Corp セラミックフィルタ板による溶融金属中の非金属介在物除去方法および装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63207457A (ja) * 1987-02-20 1988-08-26 Asahi Glass Co Ltd タンデイツシユ用堰
US5088686A (en) * 1990-07-16 1992-02-18 Magneco/Metrel, Inc. Bubble pack plastic films as patterns for producing dimpled effects in cast ceramic pieces
US5018710A (en) * 1990-10-15 1991-05-28 Magneco/Metrel, Inc. Method and devices for removing alumina and other inclusions from steel contained in tundishes
US5064175A (en) * 1990-10-15 1991-11-12 Magneco/Metrel, Inc. Method and devices for removing alumina and other inclusions from steel contained in tundishes
US5511766A (en) * 1993-02-02 1996-04-30 Usx Corporation Filtration device
WO1995006534A1 (fr) * 1993-08-28 1995-03-09 Foseco International Limited Purification de metal fondu

Also Published As

Publication number Publication date
DE102007050467A1 (de) 2009-01-29

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