EP0591056A1 - Vessel for casting a molten metal - Google Patents

Vessel for casting a molten metal Download PDF

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Publication number
EP0591056A1
EP0591056A1 EP93402393A EP93402393A EP0591056A1 EP 0591056 A1 EP0591056 A1 EP 0591056A1 EP 93402393 A EP93402393 A EP 93402393A EP 93402393 A EP93402393 A EP 93402393A EP 0591056 A1 EP0591056 A1 EP 0591056A1
Authority
EP
European Patent Office
Prior art keywords
container
tap hole
container according
projecting
projecting element
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Withdrawn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
EP93402393A
Other languages
German (de)
French (fr)
Inventor
Patrick Tassot
Francis Masse
Bernard Debiesme
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.)
Sollac SA
Original Assignee
Sollac SA
Lorraine de Laminage Continu SA SOLLAC
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 Sollac SA, Lorraine de Laminage Continu SA SOLLAC filed Critical Sollac SA
Publication of EP0591056A1 publication Critical patent/EP0591056A1/en
Withdrawn legal-status Critical Current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
    • B22D41/08—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like for bottom pouring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
    • B22D43/001—Retaining slag during pouring molten metal

Definitions

  • the invention relates to a container for pouring a liquid metal such as steel.
  • liquid steel is poured into a casting machine fitted with a distributor.
  • the liquid steel is transported in a container called a pocket; in this pocket, the liquid steel is covered with a layer of liquid slag which serves in particular to protect against reoxidation by the oxygen in the air.
  • the wall and the bottom of the pocket are covered with refractory bricks, the bottom is almost flat and pierced with a tap hole through which the liquid steel flows to feed the casting machine.
  • the object of the present invention is to remedy this drawback by proposing a pocket in which no vortex is formed during the casting of steel.
  • the invention relates to a container for the casting of a liquid metal such as liquid steel comprising a side wall and a bottom pierced with a tap hole, the bottom comprising an insulated element of form substantially parallelepipedal projecting on its internal surface disposed near the taphole, in an area remote from the wall of the container, so as to oppose the rotation of the liquid metal in the vicinity of the taphole, during the casting.
  • a liquid metal such as liquid steel
  • the bottom comprising an insulated element of form substantially parallelepipedal projecting on its internal surface disposed near the taphole, in an area remote from the wall of the container, so as to oppose the rotation of the liquid metal in the vicinity of the taphole, during the casting.
  • the distance of the projecting element from the edge of the tap hole is less than or equal to 1.5 times the diameter of the tap hole.
  • the height of the protruding element above the bottom of the container is between 100 and 350 mm.
  • the protruding element can for example be made using a refractory brick sealed in the bottom of the container and projecting above the bottom of the container.
  • the container may in particular be a ladle, the wall and bottom of which are covered with refractory materials.
  • the projecting element has the advantage of preventing the formation of a vortex during the pouring of the liquid steel and thus makes it possible to prevent the slag from being entrained with the steel.
  • the pocket generally marked with 1 in FIG. 1 consists of a metal casing 2 covered on its internal face with refractory bricks 3.
  • This hole consists of a refractory piece 7 sealed in a layer of refractory concrete 8 covering at least part of the metal casing 2 of the bottom.
  • a refractory brick 10 is sealed in the concrete 8 and protrudes towards the inside of the pocket 1.
  • the refractory brick 10 of substantially parallelepiped shape forms a projecting element isolated on the bottom of the pocket.
  • the projection which is not symmetrical with respect to the axis of the taphole and which is distant from the wall of the ladle forms a barrier near the hole 6 and prevents the formation of a vortex. It can be placed in various places around the hole 6 provided that it is not against the vertical wall 4. This isolated protruding brick will preferably be located at a distance from the edge 9 of the hole 6 less than or equal to 1.5 times the diameter of the hole.
  • the height of the projection above the flat bottom will be between 100 mm and 350 mm.
  • the protruding element may consist of a pressed or cast piece of refractory material such as tabular alumina or corundum so as to resist erosion.

Abstract

The vessel includes a bottom (5) covered with refractory material (3, 8) and pierced with a taphole (6). An element (10) projecting from the inner surface of the bottom (5) is placed in the vicinity of the taphole (6). <IMAGE>

Description

L'invention est relative à un récipient pour la coulée d'un métal liquide tel que de l'acier.The invention relates to a container for pouring a liquid metal such as steel.

Pour fabriquer des demi-produits en acier on coule de l'acier liquide dans une machine de coulée munie d'un répartiteur. Pour cela on transporte l'acier liquide dans un récipient appelé poche; dans cette poche, l'acier liquide est recouvert d'une couche de laitier liquide qui sert notamment de protection contre la réoxydation par l'oxygène de l'air. La paroi et le fond de la poche sont recouverts de briques réfractaires, le fond est à peu près plat et percé d'un trou de coulée par lequel l'acier liquide s'écoule pour alimenter la machine de coulée.To make semi-finished steel products, liquid steel is poured into a casting machine fitted with a distributor. For this, the liquid steel is transported in a container called a pocket; in this pocket, the liquid steel is covered with a layer of liquid slag which serves in particular to protect against reoxidation by the oxygen in the air. The wall and the bottom of the pocket are covered with refractory bricks, the bottom is almost flat and pierced with a tap hole through which the liquid steel flows to feed the casting machine.

Cette technique présente un inconvénient. En effet, lorsque l'acier liquide s'écoule par le trou de coulée, il se forme un vortex qui aspire une partie du laitier qui recouvre l'acier, si bien que le répartiteur de la machine de coulée est alimenté par de l'acier contenant du laitier. Ce laitier qui vient de la poche a un effet défavorable sur la qualité de l'acier coulé.This technique has a drawback. In fact, when the liquid steel flows through the taphole, a vortex is formed which sucks out part of the slag which covers the steel, so that the distributor of the casting machine is supplied with steel containing slag. This slag from the pocket has an unfavorable effect on the quality of the cast steel.

Dans d'autres cas, l'effet de vortex peut être recherché. Dans le DE-A-3.444.228, on a décrit une poche qui comporte des plaquettes en saillie disposées symétriquement autour du trou de coulée pour produire un entraînement en rotation du métal, lors de la coulée.In other cases, the vortex effect can be sought. In DE-A-3,444,228, a pocket has been described which has protruding plates arranged symmetrically around the taphole to produce a rotational driving of the metal, during casting.

Il a également été prévu dans les FR-A-2.394.348 et 2.224.230 et dans le US-A-3.470.941 un rebord en saillie autour du trou de coulée pour constituer une réserve de métal ou un siège pour recevoir une quenouille de fermeture du trou de coulée. Dans de tels dispositifs, on n'évite pas la formation d'un vortex.There is also provision in FR-A-2,394,348 and 2,224,230 and in US-A-3,470,941 a ledge projecting around the tap hole to constitute a metal reserve or a seat to receive a stopper for closing the tap hole. In such devices, the formation of a vortex is not avoided.

De même la disposition d'un élément en saillie sur une paroi du récipient de coulée proche du trou de coulée comme décrit dans le NL-A-8503275 ne présente pas une efficacité suffisante pour éviter l'entraînement de laitier.Likewise, the arrangement of a protruding element on a wall of the pouring container close to the tap hole as described in NL-A-8503275 does not have sufficient effectiveness to avoid slag entrainment.

Le but de la présente invention est de remédier à cet inconvénient en proposant une poche dans laquelle il ne se forme pas de vortex lors de la coulée de l'acier.The object of the present invention is to remedy this drawback by proposing a pocket in which no vortex is formed during the casting of steel.

A cet effet, l'invention a pour objet un récipient pour la coulée d'un métal liquide tel que de l'acier liquide comportant une paroi latérale et un fond percé d'un trou de coulée, le fond comportant un élément isolé de forme sensiblement parallélépipédique en saillie sur sa surface interne disposé à proximité du trou de coulée, dans une zone éloignée de la paroi du récipient, de manière à s'opposer à la mise en rotation du métal liquide au voisinage du trou de coulée, lors de la coulée.To this end, the invention relates to a container for the casting of a liquid metal such as liquid steel comprising a side wall and a bottom pierced with a tap hole, the bottom comprising an insulated element of form substantially parallelepipedal projecting on its internal surface disposed near the taphole, in an area remote from the wall of the container, so as to oppose the rotation of the liquid metal in the vicinity of the taphole, during the casting.

De préférence, la distance de l'élément en saillie au bord du trou de coulée est inférieure ou égale à 1,5 fois le diamètre du trou de coulée.Preferably, the distance of the projecting element from the edge of the tap hole is less than or equal to 1.5 times the diameter of the tap hole.

De préférence, la hauteur de l'élément en saillie au-dessus du fond du récipient est comprise entre 100 et 350 mm.Preferably, the height of the protruding element above the bottom of the container is between 100 and 350 mm.

L'élément en saillie peut par exemple être réalisé en utilisant une brique réfractaire scellée dans le fond du récipient et faisant saillie au-dessus du fond du récipient.The protruding element can for example be made using a refractory brick sealed in the bottom of the container and projecting above the bottom of the container.

Le récipient peut notamment être une poche de coulée dont la paroi et le fond sont recouverts de matériaux réfractaires.The container may in particular be a ladle, the wall and bottom of which are covered with refractory materials.

L'élément en saillie a l'avantage d'empêcher la formation d'un vortex lors de la coulée de l'acier liquide et ainsi permet d'éviter que le laitier soit entraîné avec l'acier.The projecting element has the advantage of preventing the formation of a vortex during the pouring of the liquid steel and thus makes it possible to prevent the slag from being entrained with the steel.

L'invention va maintenant être décrite plus en détail en regard des figures annexées dans lesquelles :

  • La figure 1 est une vue en coupe et en élévation d'une poche dont le fond est muni d'un élément en saillie.
  • La figure 2 est une vue de dessus d'une poche dont le fond est muni d'un élément en saillie.
The invention will now be described in more detail with reference to the appended figures in which:
  • Figure 1 is a sectional and elevational view of a pocket whose bottom is provided with a projecting element.
  • Figure 2 is a top view of a pocket whose bottom is provided with a projecting element.

La poche repérée généralement par 1 sur la figure 1 est constituée d'une enveloppe métallique 2 recouverte sur sa face interne de briques réfractaires 3.The pocket generally marked with 1 in FIG. 1 consists of a metal casing 2 covered on its internal face with refractory bricks 3.

Elle comporte une paroi latérale 4 verticale et un fond 5 plat. Le fond 5 est percé d'un trou de coulée 6. Ce trou est constitué par une pièce en réfractaire 7 scellée dans une couche de béton réfractaire 8 recouvrant une partie au moins de l'enveloppe métallique 2 du fond. En bordure de la pièce 7 et à une distance du bord 9 du trou 6 d'environ 1,5 fois le diamètre du trou, une brique réfractaire 10 est scellée dans le béton 8 et fait saillie vers l'intérieur de la poche 1. La brique 10 en réfractaire de forme sensiblement parallélépipédique constitue un élément en saillie isolé sur le fond de la poche. La saillie qui n'est pas symétrique par rapport à l'axe du trou de coulée et qui est éloignée de la paroi de la poche forme un barrage à proximité du trou 6 et empêche la formation d'un vortex. Elle peut être placée à divers endroits autour du trou 6 pourvu qu'elle ne soit pas contre la paroi verticale 4. Cette brique isolée en saillie sera située de préférence à une distance du bord 9 du trou 6 inférieur ou égale à 1,5 fois le diamètre du trou.It has a vertical side wall 4 and a flat bottom 5. The bottom 5 is pierced with a tap hole 6. This hole consists of a refractory piece 7 sealed in a layer of refractory concrete 8 covering at least part of the metal casing 2 of the bottom. At the edge of the part 7 and at a distance from the edge 9 of the hole 6 of approximately 1.5 times the diameter of the hole, a refractory brick 10 is sealed in the concrete 8 and protrudes towards the inside of the pocket 1. The refractory brick 10 of substantially parallelepiped shape forms a projecting element isolated on the bottom of the pocket. The projection which is not symmetrical with respect to the axis of the taphole and which is distant from the wall of the ladle forms a barrier near the hole 6 and prevents the formation of a vortex. It can be placed in various places around the hole 6 provided that it is not against the vertical wall 4. This isolated protruding brick will preferably be located at a distance from the edge 9 of the hole 6 less than or equal to 1.5 times the diameter of the hole.

De préférence la hauteur de la saillie au dessus du fond plat sera comprise entre 100 mm et 350 mm.Preferably the height of the projection above the flat bottom will be between 100 mm and 350 mm.

L'élément en saillie peut être constitué d'une pièce de forme pressée ou coulée en matériau réfractaire tel que l'alumine tabulaire ou le corindon de manière à résister à l'érosion.The protruding element may consist of a pressed or cast piece of refractory material such as tabular alumina or corundum so as to resist erosion.

Claims (6)

Récipient pour la coulée d'un métal liquide tel que de l'acier liquide comportant un fond (5) recouvert de matériau réfractaire (3, 8) percé d'un trou de coulée (6), caractérisé en ce que le fond (5) comporte un élément isolé de forme sensiblement parallélépipédique (10) en saillie sur sa surface interne et disposé à proximité du trou de coulée (6) dans une zone éloignée de la paroi (3) du récipient, de manière à s'opposer à la mise en rotation du métal liquide au voisinage du trou de coulée, lors de la coulée.Container for pouring a liquid metal such as liquid steel comprising a bottom (5) covered with refractory material (3, 8) pierced with a tap hole (6), characterized in that the bottom (5 ) comprises an insulated element of substantially parallelepiped shape (10) projecting from its internal surface and disposed near the taphole (6) in an area remote from the wall (3) of the container, so as to oppose the rotation of the liquid metal in the vicinity of the tap hole, during casting. Récipient selon la revendication 1, caractérisé en ce que la distance entre l'élément en saillie (10) et le bord du trou de coulée (6) est inférieure à 1,5 fois le diamètre du trou de coulée (6).Container according to claim 1, characterized in that the distance between the projecting element (10) and the edge of the tap hole (6) is less than 1.5 times the diameter of the tap hole (6). Récipient selon l'une quelconque des revendications 1 et 2 caractérisé en ce que la hauteur de la saillie (10) au-dessus du fond de la poche est comprise entre 100 et 350 mm.Container according to either of Claims 1 and 2, characterized in that the height of the projection (10) above the bottom of the pocket is between 100 and 350 mm. Récipient selon l'une quelconque des revendications 1, 2 ou 3, caractérisé en ce que l'élément en saillie (10) est constitué par une pièce en matériau réfractaire coulée ou pressée, scellée dans le fond du récipient.Container according to any one of Claims 1, 2 or 3, characterized in that the projecting element (10) consists of a piece of cast or pressed refractory material, sealed in the bottom of the container. Récipient selon l'une quelconque de revendications 1 à 4, caractérisé en ce que l'élément en saillie (10) est constitué par une brique en matériau réfractaire scellée dans le fond du récipient.Container according to any one of Claims 1 to 4, characterized in that the projecting element (10) consists of a brick of refractory material sealed in the bottom of the container. Récipient selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'élément en saillie (10) est en alumine tabulaire ou en corindon.Container according to any one of Claims 1 to 5, characterized in that the projecting element (10) is made of tabular alumina or of corundum.
EP93402393A 1992-10-01 1993-09-30 Vessel for casting a molten metal Withdrawn EP0591056A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9211783A FR2696368B1 (en) 1992-10-01 1992-10-01 Container for pouring a liquid metal.
FR9211783 1992-10-01

Publications (1)

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EP0591056A1 true EP0591056A1 (en) 1994-04-06

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EP93402393A Withdrawn EP0591056A1 (en) 1992-10-01 1993-09-30 Vessel for casting a molten metal

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EP (1) EP0591056A1 (en)
FR (1) FR2696368B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1172447A1 (en) * 2000-06-28 2002-01-16 SMS Demag AG Method and device for slag free pouring of metal, especially steel, from an upright metallurgical vessel
CN112658237A (en) * 2020-12-11 2021-04-16 北京首钢股份有限公司 Steel ladle capable of inhibiting eddy current
CN113042725A (en) * 2021-03-11 2021-06-29 马鞍山钢铁股份有限公司 Slag entrapment prevention dam blocking control method for ladle nozzle

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2134009A1 (en) * 1971-04-22 1972-12-01 Kloeckner Werke Ag
FR2169899A1 (en) * 1971-12-30 1973-09-14 Maximilianshuette Eisenwerk
FR2214544A1 (en) * 1973-01-18 1974-08-19 Jones & Laughlin Steel Corp
EP0175132A1 (en) * 1984-08-15 1986-03-26 Inland Steel Company Fluid flow control structure for tundish
NL8503275A (en) * 1985-11-27 1987-06-16 Hoogovens Groep Bv Refractory lined continuous steel casing ladle with bottom tap hole - adjacent to sidewall and having inward projection to reduce hole to wall distance and delay onset of vortexing
EP0417898A1 (en) * 1989-08-15 1991-03-20 Magneco/Metrel, Inc. Gunning composition

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3470941A (en) * 1966-01-10 1969-10-07 Thompson Mfg Co Earl A Apparatus for casting metal into each of a series of molds
DE2316757C3 (en) * 1973-04-04 1978-08-03 Thermo-Industrie Gmbh & Co Kg, 3300 Braunschweig Ladle for steel
FR2394348A2 (en) * 1977-06-16 1979-01-12 Daussan & Co Tundish for continuous casting - where exothermic bush is located above stopper outlet bush
DE3444228C2 (en) * 1984-11-30 1986-12-18 Mannesmann AG, 4000 Düsseldorf Method and device for generating a directed flow

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2134009A1 (en) * 1971-04-22 1972-12-01 Kloeckner Werke Ag
FR2169899A1 (en) * 1971-12-30 1973-09-14 Maximilianshuette Eisenwerk
FR2214544A1 (en) * 1973-01-18 1974-08-19 Jones & Laughlin Steel Corp
EP0175132A1 (en) * 1984-08-15 1986-03-26 Inland Steel Company Fluid flow control structure for tundish
NL8503275A (en) * 1985-11-27 1987-06-16 Hoogovens Groep Bv Refractory lined continuous steel casing ladle with bottom tap hole - adjacent to sidewall and having inward projection to reduce hole to wall distance and delay onset of vortexing
EP0417898A1 (en) * 1989-08-15 1991-03-20 Magneco/Metrel, Inc. Gunning composition

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1172447A1 (en) * 2000-06-28 2002-01-16 SMS Demag AG Method and device for slag free pouring of metal, especially steel, from an upright metallurgical vessel
CN112658237A (en) * 2020-12-11 2021-04-16 北京首钢股份有限公司 Steel ladle capable of inhibiting eddy current
CN113042725A (en) * 2021-03-11 2021-06-29 马鞍山钢铁股份有限公司 Slag entrapment prevention dam blocking control method for ladle nozzle

Also Published As

Publication number Publication date
FR2696368B1 (en) 1994-12-23
FR2696368A1 (en) 1994-04-08

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