EP1893371B1 - Bouchon de fermeture pour cuve de fusion métallurgique - Google Patents

Bouchon de fermeture pour cuve de fusion métallurgique Download PDF

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Publication number
EP1893371B1
EP1893371B1 EP06761977A EP06761977A EP1893371B1 EP 1893371 B1 EP1893371 B1 EP 1893371B1 EP 06761977 A EP06761977 A EP 06761977A EP 06761977 A EP06761977 A EP 06761977A EP 1893371 B1 EP1893371 B1 EP 1893371B1
Authority
EP
European Patent Office
Prior art keywords
opening
gas
channel
stopper according
gas outlet
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
EP06761977A
Other languages
German (de)
English (en)
Other versions
EP1893371A2 (fr
Inventor
Markus Fauhl
Jürgen PERNOT
Helmut Müller
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
Application filed by Refractory Intellectual Property GmbH and Co KG filed Critical Refractory Intellectual Property GmbH and Co KG
Priority to PL06761977T priority Critical patent/PL1893371T3/pl
Publication of EP1893371A2 publication Critical patent/EP1893371A2/fr
Application granted granted Critical
Publication of EP1893371B1 publication Critical patent/EP1893371B1/fr
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
    • B22D41/14—Closures
    • B22D41/16—Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
    • B22D41/18—Stopper-rods therefor
    • B22D41/186—Stopper-rods therefor with means for injecting a fluid into the melt

Definitions

  • the invention relates to a sealing plug for a metallurgical melting vessel.
  • Such plugs serve to regulate the outflow quantity of a molten metal in the region of an outlet opening of an associated melting vessel, for example a tundish.
  • Such a sealing plug is usually constructed as follows: It has a rod-shaped body of at least one refractory ceramic material, which has a first upper end and a second lower end respectively. From the first end, a bag-like opening extends in the axial direction of the rod-shaped body towards the second end, this opening terminating at a bottom spaced from the second end of the body. A gas outlet channel having a smaller cross-sectional area than the opening connects the bottom of the opening to a surface portion in the region of the second end of the body. Adjacent to the first end, the opening has peripherally fixing means which for fixing a corresponding holding device, usually a support rod serve, via which the closure plug is attached to a manipulator. With the help of the manipulator, the plug is moved up and down to either seal the outlet opening of the melting vessel or release to an adjustable opening width.
  • a known plug of the generic type is known from EP 0 358 535 B2 known. The disclosure is referred to.
  • the opening and the subsequent gas outlet channel serve (also) to guide a gas through the closure plug into the molten metal.
  • the gas serves for the secondary metallurgical treatment of the melt. For example, it is intended to remove metallic inclusions in the melt by flotation. Important in this context is a constant flow of the treatment gas.
  • sealing plug If the sealing plug is in a position away from the outflow opening of the melting vessel, molten metal flows out. In this case, by the flow of the molten metal, a negative pressure below the lower end of the sealing plug arise. This negative pressure can become so great that the gas flow breaks off. At the same time, air can be sucked in. Both are undesirable.
  • the EP 1 401 600 B1 describes a generic plug (there called monoblock plug), in which a calibration device is installed in the gas outlet. This consists of a rod which has one or more axial gas channels. In this way, a certain flow resistance should be set.
  • the known device is complicated to manufacture. In addition, it is difficult to set a certain flow resistance.
  • the post-published WO 2005/059185 describes a plug with an insert in the plug opening through which a tube is passed. From the FR 2787045 a stopper is known in the sack-shaped opening a Venturi nozzle is designed for a gas passage.
  • the invention has for its object to offer a sealing plug, which is easy to manufacture and with the transport and the supply of gas, in particular inert gas, can be done effectively and safely in a molten metal.
  • the aforementioned bag-like opening in the plug body usually has a circular cross-sectional area with a diameter of several centimeters.
  • the gas outlet channel adjoining the opening has a much smaller cross-sectional area, usually with a diameter of only a few millimeters.
  • the large opening usually extends over much more than half the total length of the plug body, while the gas outlet channel extends only in the second lower end portion and is correspondingly short.
  • the invention is based on the idea to move the means for adjusting the gas flow resistance from the region of the gas outlet channel at the lower, second end of the sealing plug in the overlying opening.
  • the opposite the gas outlet very much larger opening must be at least partially filled with a corresponding filler.
  • This filler body can extend over a corresponding partial length of the opening (viewed in the axial direction of the plug body) and thereby fills the entire cross-sectional area of the opening.
  • the displacement of the means for adjusting the gas flow resistance in the opening provides numerous opportunities to adjust the flow resistance individually, depending on where the opening over which Length of the filling body is formed and how many channels are arranged in which form within the filling body.
  • the invention in its most general embodiment relates to a sealing plug for a metallurgical melting vessel having the features of claim 1.
  • the said bottom of the opening can be designed arbitrarily. It can be more or less perpendicular to the axial direction of the body. It can also be curved, for example concave or convex. It is also possible, funnel-shaped view of the bottom portion - viewed in the axial direction of the sealing plug, with direct connection to the following gas outlet.
  • the filler (with the gas channels running therein) can - as stated - have almost any length. Its length will depend on, among other things, how large the flow resistance is, which is desired for the gas flow in the particular application. Normally, the filler - viewed in the axial direction of the body - have a length which is at least 5% of the length of the opening. This value can be increased according to various embodiments also> 10%,> 15%, to values> 25%.
  • the arrangement of the filling body within the opening is almost arbitrary.
  • the packing may be tight except for the gas passage area.
  • An arrangement of the filling body immediately adjacent to the bottom of the opening has fluidic advantages. For this purpose, it is to be ensured that the bottom-side opening of the gas channel, which runs in the filler body or in the contact region between filler body and body of the sealing plug, is in fluid communication with the gas inlet-side opening of the gas outlet channel at the bottom end of the plug body (at the so-called plug head).
  • closure plugs of the type mentioned are produced by isostatic pressing.
  • the opening and the gas outlet channel is formed in situ.
  • the filler can be subsequently poured. A possible manufacturing method for this is shown in the context of the subsequent description of the figures.
  • the filler may also be a pressed part, which is used during manufacture or subsequently in the opening of the pre-pressed stopper body.
  • the gas channel can run through the filler. It can also be formed on the outer wall of the filler in the form of a groove.
  • the wall of the opening delimits the gas channel on the outside.
  • the wall of the opening may have a groove and the filler (its peripheral surface) then bounds the groove on the inside, so that a gas channel is formed.
  • the gas channel may be arranged spirally around the central longitudinal axis.
  • the length of the filling body can be increased.
  • a particular advantage of the design according to the invention is that the filler is disposed within the large opening and thus has a considerable cross-sectional area, which makes it possible to guide the gas channel, for example, meandering or helical through the filler or between filler and body. Thus, its length is sometimes much greater than the shortest distance between its end (bottom and top) outlet openings.
  • a porous filter such as a porous, temperature-resistant filter paper or with a porous plug.
  • a porous, sponge-like element can also be provided as part of the filling body.
  • FIG. 1 is to recognize a lower portion 10 of a rod-shaped body of a sealing plug.
  • the rod-shaped body consists of a refractory material of conventional type.
  • an opening 12 extends in the body 10 and extends from an upper end (not shown) of the body 10 towards a second lower end 14 and at a distance to this end in the area of a floor 16 ends.
  • a gas outlet channel 20 extends coaxially to the central longitudinal axis M - M as far as the lowermost section of the second end 14.
  • FIG. 1 shows a step of producing the closure body, wherein the body 10 was first prepared in a conventional manner by isostatic pressing.
  • a wire 22 is drawn in via the gas outlet channel 20, wherein the wire 22 at its free lower end has a thickening 22 d, while the portion in the gas outlet channel 20 rests, has a larger diameter (the gas outlet channel 20 largely fills) than the overlying portion 22a, which extends through the opening 12 to the first upper end of the closure body and is temporarily fixed there in a manner not shown.
  • a refractory concrete is poured into the opening 12 and advanced by means of a plunger until about the hatched area above the gas outlet channel 20 is filled with the still viscous concrete, which encloses the wire 22 in the section 22a.
  • the wire 22 is again removed against its feed direction. For this purpose, the wire 22 can be gripped on the thickening 22d and pulled down.
  • a corresponding gas channel 26 is formed which continues into the gas outlet channel 20.
  • burnable bodies can also be used. During the subsequent firing of the sealing plug, burning out of these inserts results in the formation of the desired gas channels in the desired arrangement and geometry.
  • the pressed filler insert 24 has a spiral-shaped gas channel 26, whose lower outlet-side end extends coaxially to the central longitudinal axis M-M of the body 10.
  • the gas channel 26 is formed in the transition region of packing 24 and body 10.
  • the filling body 24 has a helical groove 26n on its circumferential surface 24u, which is bounded on the outside by the boundary wall 12i of the opening 12. Together of filler 24 and body 10 while the gas channel 26 is formed, which creates a fluidic connection from the opening 12 to the gas outlet 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Claims (9)

  1. Bouchon de fermeture pour une cuve de fusion métallurgique présentant les caractéristiques suivantes :
    a) un corps (10) en forme de barreau en au moins un matériau céramique réfractaire, avec une première extrémité supérieure et une seconde extrémité inférieure (14),
    b) de la première extrémité une ouverture (12) de type sac s'étend dans le sens axial du corps (10) en direction de la seconde extrémité (14),
    c) l'ouverture (12) se termine par un fond (16) à distance de la seconde extrémité (14) du corps (10),
    d) un canal d'évacuation de gaz (20) relie l'ouverture (12) à une section de surface dans la zone de la seconde extrémité (14) du corps (10),
    e) le canal d'évacuation de gaz (20) présente une aire de section qui est plus petite que l'aire de section de l'ouverture (12),
    f) dans le sens axial du corps (10) un corps de remplissage (24) s'étend sur une partie de l'ouverture (12),
    g) par le corps de remplissage (24) ou entre le corps de remplissage (24) et le corps (10) s'étend au moins un canal de gaz (26) qui relie en écoulement l'ouverture (12) au canal d'évacuation de gaz (20),
    h) l'au moins un canal de gaz (26) présente une longueur qui est plus grande que la distance la plus courte entre les ouvertures de sortie côté extrémités du canal de gaz (26).
  2. Bouchon de fermeture selon la revendication 1, dans lequel le corps de remplissage (24), dans le sens axial du corps (10), présente une longueur qui s'élève à au moins 0,05 fois la longueur de l'ouverture (12).
  3. Bouchon de fermeture selon la revendication 1, dans lequel le corps de remplissage (24) est un élément coulé.
  4. Bouchon de fermeture selon la revendication 1, dans lequel le corps de remplissage (24) est un élément réalisé par pressage.
  5. Bouchon de fermeture selon la revendication 1, dans lequel l'au moins un canal de gaz (26) est réalisé en forme de méandres ou de filetage.
  6. Bouchon de fermeture selon la revendication 1, dans lequel le corps de remplissage (24) est réalisé au moins par endroits de manière spongieuse.
  7. Bouchon de fermeture selon la revendication 1, dans lequel le canal d'évacuation de gaz (20) sort coaxialement à l'axe médian longitudinal du corps (10) au niveau de la seconde extrémité (14) du corps (10).
  8. Bouchon de fermeture selon la revendication 1, dans lequel l'au moins un canal de gaz (26) est formé au moins en partie par une cavité de surface du corps de remplissage (24).
  9. Bouchon de fermeture selon la revendication 1, dans lequel l'au moins un canal de gaz (26) est formé au moins en partie par une cavité de surface sur une paroi de délimitation (12i) de l'ouverture (12).
EP06761977A 2005-06-21 2006-06-14 Bouchon de fermeture pour cuve de fusion métallurgique Not-in-force EP1893371B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06761977T PL1893371T3 (pl) 2005-06-21 2006-06-14 Zatyczka zamykająca do metalurgicznego naczynia do topienia

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005029033A DE102005029033B4 (de) 2005-06-21 2005-06-21 Verschlussstopfen für ein metallurgisches Schmelzgefäß
PCT/EP2006/005395 WO2006136285A2 (fr) 2005-06-21 2006-06-14 Bouchon de fermeture pour cuve de fusion métallurgique

Publications (2)

Publication Number Publication Date
EP1893371A2 EP1893371A2 (fr) 2008-03-05
EP1893371B1 true EP1893371B1 (fr) 2009-08-05

Family

ID=37227105

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06761977A Not-in-force EP1893371B1 (fr) 2005-06-21 2006-06-14 Bouchon de fermeture pour cuve de fusion métallurgique

Country Status (11)

Country Link
US (1) US7910050B2 (fr)
EP (1) EP1893371B1 (fr)
CN (1) CN101203342B (fr)
AT (1) ATE438472T1 (fr)
BR (1) BRPI0612520A2 (fr)
DE (2) DE102005029033B4 (fr)
ES (1) ES2328957T3 (fr)
PL (1) PL1893371T3 (fr)
RU (1) RU2384387C2 (fr)
UA (1) UA87754C2 (fr)
WO (1) WO2006136285A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2209056B1 (fr) * 2009-01-16 2012-01-04 Refractory Intellectual Property GmbH & Co. KG Dispositif de contrôle du flux dans un processus de coulée d'acier en continu
PL2233227T3 (pl) 2009-03-23 2011-05-31 Refractory Intellectual Property Gmbh & Co Kg Ogniotrwała zatyczka ceramiczna
PL2653248T3 (pl) * 2012-04-16 2014-07-31 Refractory Intellectual Property Gmbh & Co Kg Ceramiczna zatyczka ogniotrwała
CN107498033B (zh) * 2017-06-27 2019-08-23 益阳紫荆福利铸业有限公司 一种陶塞杆芯棒
CN107385153B (zh) * 2017-09-05 2022-09-20 武汉科技大学 一种能将冶金炉内金属熔体的运动状态搅拌呈螺旋流的透气砖制作方法
US12023730B2 (en) * 2018-12-25 2024-07-02 Krosakiharima Corporation Stopper for continuous casting and continuous casting method

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8411596D0 (en) * 1984-05-05 1984-06-13 Thor Ceramics Ltd Stopper
HU891288D0 (en) * 1988-02-19 1990-03-28 Veitscher Magnesitwerke Ag Gasflushing apparatus
US4946083A (en) * 1988-12-29 1990-08-07 Vesuvius Crucible Company One-piece stopper rod
CN2114523U (zh) * 1992-03-26 1992-09-02 淄博市淄川区洪山特殊耐火材料厂 塞棒
CN1284019A (zh) * 1997-11-27 2001-02-14 福塞科国际有限公司 塞杆
FR2787045B1 (fr) * 1998-12-10 2001-02-09 Lorraine Laminage Piece refractaire d'injection de gaz dans un circuit de coulee de metal liquide
GB9917888D0 (en) * 1999-07-30 1999-09-29 Foseco Int Stopper rod
AU2002315577B2 (en) * 2001-06-12 2006-08-03 Vesuvius Usa Corporation Stopper for reliable gas injection
WO2005059185A1 (fr) * 2003-12-16 2005-06-30 Vesuvius Crucible Company Quenouille permettant de mesurer la temperature
DE602005002359T2 (de) * 2005-06-21 2008-05-29 Refractory Intellectual Property Gmbh & Co. Kg Stopfenstange

Also Published As

Publication number Publication date
WO2006136285A3 (fr) 2007-03-15
CN101203342A (zh) 2008-06-18
WO2006136285A2 (fr) 2006-12-28
DE102005029033B4 (de) 2007-10-11
ES2328957T3 (es) 2009-11-19
DE102005029033A1 (de) 2006-12-28
EP1893371A2 (fr) 2008-03-05
BRPI0612520A2 (pt) 2010-11-23
US7910050B2 (en) 2011-03-22
CN101203342B (zh) 2010-11-24
RU2384387C2 (ru) 2010-03-20
ATE438472T1 (de) 2009-08-15
DE502006004455D1 (de) 2009-09-17
UA87754C2 (ru) 2009-08-10
RU2007145936A (ru) 2009-07-27
US20100044402A1 (en) 2010-02-25
PL1893371T3 (pl) 2009-11-30

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