FR2681804A1 - Improvement made to closures for the taphole of a converter - Google Patents

Improvement made to closures for the taphole of a converter Download PDF

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Publication number
FR2681804A1
FR2681804A1 FR9111914A FR9111914A FR2681804A1 FR 2681804 A1 FR2681804 A1 FR 2681804A1 FR 9111914 A FR9111914 A FR 9111914A FR 9111914 A FR9111914 A FR 9111914A FR 2681804 A1 FR2681804 A1 FR 2681804A1
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FR
France
Prior art keywords
swimmers
rods
section
installation according
triangular cross
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.)
Granted
Application number
FR9111914A
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French (fr)
Other versions
FR2681804B1 (en
Inventor
Belle Van Marcel
Bodin Gerard
Lerouge Jean-Claude
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.)
BOULONNAIS TERRES REFRACTAIRES
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BOULONNAIS TERRES REFRACTAIRES
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Application filed by BOULONNAIS TERRES REFRACTAIRES filed Critical BOULONNAIS TERRES REFRACTAIRES
Priority to FR9111914A priority Critical patent/FR2681804B1/en
Publication of FR2681804A1 publication Critical patent/FR2681804A1/en
Application granted granted Critical
Publication of FR2681804B1 publication Critical patent/FR2681804B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4653—Tapholes; Opening or plugging thereof
    • 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
    • B22D43/002—Retaining slag during pouring molten metal by using floating means

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Moulds, Cores, Or Mandrels (AREA)

Abstract

Installation for obtaining, in a large series, elongate pieces such as, in particular, rods of "floaters" ("swimmers") serving for closing the taphole for steel in a metallurgical converter when the slag appears, characterised in that: - it comprises one or more moulds (1) making it possible, in a single operation, to produce a series of rods of "floaters" (2) shaped as bars with a cross-section in the shape of a right angle triangle comprising, in their core, a metallic shaft (4), to the end of which a hemispherical bowl (5) is attached, by a known means, with a view to obtaining the complete "floater".

Description

La présente invention est relative à un organe d'un convertisseur sidérurgique. Ce dispositif est destiné à éviter lors de la coulée du métal en fusion le mélange de l'acier et du laitier. Lorsque l'opérateur s'aperçoit de la présence du laitier, il déclenche le redressement du convertisseur et un dispositif faisant office d'obturateur devant le trou de coulée empêchant ainsi au laitier de se mêler à la coulée d'acier.The present invention relates to a member of a steel converter. This device is intended to prevent the pouring of molten metal from mixing steel and slag. When the operator notices the presence of the slag, it triggers the rectification of the converter and a device acting as a shutter in front of the taphole thus preventing the slag from mixing with the steel pouring.

On connait des dispositifs d'arrêt de laitier qui revendiquent cette utilisation, il s'agit notamment - de boule d'acier ou de fonte enrobées de réfractaires flottant à l'interface métal-laitier.Slag arresters are known which claim this use, these are in particular - steel or cast iron balls coated with refractories floating at the metal-slag interface.

- boule à tige de section droite circulaire passant dans le trou de coulée.- rod ball of circular cross section passing through the tap hole.

- dispositif à obturateur réfractaire associé à un dispositif de détection électromagnétique du laitier.- refractory shutter device associated with an electromagnetic slag detection device.

Tous ces précédents obturateurs ou boules sont généralement enfilées sur des tiges de section droite circulaire en béton prémoulé formant, ainsi un nageur
L'inconvénient majeur de cette technologie est qu'il faut procéder par moulage des deux parties semi cylindriques impliquant donc de nombreuses manipulations unitaires et interdisant toute production de série.All of these preceding shutters or balls are generally threaded on rods of circular cross-section made of pre-molded concrete, thus forming a swimmer
The major drawback of this technology is that it is necessary to proceed by molding the two semi-cylindrical parts therefore involving numerous unitary manipulations and prohibiting any mass production.

La présente invention se propose d'apporter une simplification au procédé de fabrication visant à une production en série par l'élaboration par moulage en une seule opération des tiges du "nageur". The present invention proposes to bring a simplification to the manufacturing process aimed at mass production by the development by molding in a single operation of the rods of the "swimmer".

L'invention a donc pour objet une installation pour l'obtention en grande série de pièces allongées telles que notamment des tiges de "nageurs" servant à obturer le trou de coulée d'acier dans un convertisseur sidérurgique lorsque le laitier apparat caractérisé en ce que - elle comprend un ou plusieurs moules permettant de réaliser en une seule opération une série de tiges de "nageurs" conformées en barres de section droite triangulaire comprenant en leur âme un axe métallique sur lesquelles on rapporte de manière connue un bol hémisphérique en vue d'obtenir "le nageur".The invention therefore relates to an installation for obtaining large series of elongated parts such as in particular rods of "swimmers" used to close the steel tap hole in a steel converter when the slag appears, characterized in that - It comprises one or more molds making it possible to produce, in a single operation, a series of "swimmers" rods shaped into bars of triangular cross section comprising in their core a metallic axis on which a hemispherical bowl is reported in a known manner in order to get "the swimmer".

D'autres caractéristiques et avantages de la présente invention ressortiront de la description faite ci-après en référence aux dessins annexés qui en illustrent un exemple de réalisation dépourvu de tout caractère limitatif. Sur les dessins - La figure 1 est une perspective d'un moule servant à l'obtention en série de tiges de "nageurs" conformées en barres allongées de section triangulaire.Other characteristics and advantages of the present invention will emerge from the description given below with reference to the appended drawings which illustrate an embodiment thereof devoid of any limiting character. In the drawings - Figure 1 is a perspective of a mold used for obtaining in series rods of "swimmers" shaped into elongated bars of triangular section.

- La figure 2 est une vue en perspective d'une tige de "nageur" munie en son âme d'un axe métallique.- Figure 2 is a perspective view of a "swimmer" rod provided in its core with a metal axis.

- La figure 3 est une vue en perspective d'une tige de "nageur" munie du bol hémisphérique plein réalisant ainsi le "nageur" complet.- Figure 3 is a perspective view of a "swimmer" rod provided with the full hemispherical bowl thus achieving the complete "swimmer".

~ La figure 4 est une vue plane en élévation frontale d'une partie du moule comprenant une tige de "nageur". ~ Figure 4 is a plan view in front elevation of part of the mold comprising a "swimmer" rod.

En se référant aux dessins et notamment aux figures 1 - 2 - 3 et 4 on voit que 1 l'installation objet de cette invention comporte principalement un ou plusieurs moules (1) possédant une série d'empreintes de forme triangulaire à flanc deux à deux parallèles qui débouchent à chaque extrémité dudit moule. On prévoit sur chaque flanc de l'empreinte des rainures (6) de forme arrondie destinées à retenir le ciment de jointoiemententre le bol hémisphérique (5) et la tige.Referring to the drawings and in particular to Figures 1 - 2 - 3 and 4 we see that 1 the installation object of this invention mainly comprises one or more molds (1) having a series of imprints of triangular shape flank two by two parallels which open at each end of said mold. Grooves (6) of rounded shape are provided on each side of the imprint intended to retain the jointing cement between the hemispherical bowl (5) and the rod.

Cette configuration des moules (1) permet d'inclure par des moyens connus un axe métallique (4) au centre de chacune des empreintes.This configuration of the molds (1) makes it possible to include, by known means, a metal axis (4) at the center of each of the cavities.

L'obtention des tiges conformées en barres allongées de section droite triangulaire comme (2) munies en leur âme d'un axe métallique est réalisée par coulage d'un béton prémoulé. On aura pris soin d'interposer avant coulage du béton un film (7) par exemple en caoutchouc sur les surfaces du moule afin de faciliter le démoulage des tiges de "nageur". Il suffit ensuite de surfacer la face apparente de la barre (2) contenue dans le moule (1).Obtaining the rods shaped into elongated bars of triangular cross section as (2) provided in their soul with a metallic axis is carried out by pouring a pre-molded concrete. Care will have been taken to interpose a concrete film (7), for example rubber, on the mold surfaces before pouring the concrete in order to facilitate demolding of the "swimmer" rods. It then suffices to surface the visible face of the bar (2) contained in the mold (1).

Après démoulage des tiges de "nageur" (2), par l'intermédiaire des orifices (8) circulaires prévus dans le fond de chaque empreinte, on réalise l'assemblage par un moyen connu d'un bol hémisphérique (5) sur l'axe métallique (4) en vue d'obtenir le "nageur" complet (3)
La lecture de la description montre que l'invention apporte effectivement un mode d'obtention économique en grande série de "nageurs" pour convertisseur.After release of the "swimmer" rods (2), via the circular holes (8) provided in the bottom of each imprint, the assembly is carried out by known means of a hemispherical bowl (5) on the metal shaft (4) to obtain the complete "swimmer" (3)
Reading the description shows that the invention effectively provides an economical method of obtaining large numbers of "swimmers" for converters.

Bien entendu, l'invention vise également les "nageurs" obtenus pour la mise en oeuvre de l'installation selon la description ci-dessus et qui se caractérise par une tige de section droite triangulaire. Of course, the invention also relates to the "swimmers" obtained for the implementation of the installation according to the description above and which is characterized by a rod of triangular cross section.

Claims (5)

REVENDICATIONS 1 - Installation pour l'obtention en grande série de pièces allongées , telles que notamment des tiges de "nageurs" servant à obturer le trou de coulée d'acier dans un convertisseur sidérurgique lorsque le laitier apparat caractérisé en ce que - elle comprend un ou plusieurs moules (1) permettant de réaliser en une seule opération une série de tiges de "nageurs" (2) conformés en barres de section droite triangulaire comprenant en leur âme un axe métallique (4) à l'extrémité desquelles on rapporte par un moyen connu un bol hémisphérique (5) en vue d'obtenir le "nageur" complet.1 - Installation for obtaining large series of elongated parts, such as in particular rods of "swimmers" used to close the steel pouring hole in a steel converter when the slag appears, characterized in that - it comprises one or several molds (1) making it possible to produce, in a single operation, a series of "swimmers" rods (2) shaped into bars of triangular cross section comprising in their soul a metallic axis (4) at the end of which is brought back by means known a hemispherical bowl (5) in order to obtain the complete "swimmer". 2 - Installation selon la revendication 1 caractérisée en ce que l'on réalise deux rainures (6) longitudinales de forme arrondie dans le moule métallique destinées à retenir le ciment de jointoiement dans le bol (5).2 - Installation according to claim 1 characterized in that one carries out two longitudinal grooves (6) of rounded shape in the metal mold intended to retain the jointing cement in the bowl (5). 3 - Installation selon la revendication 1 caractérisée en ce que les "nageurs" conformés en barres de section droite triangulaire et munies de deux rainures longitudinales sont réalisées en béton pré-moulé.3 - Installation according to claim 1 characterized in that the "swimmers" shaped bars of triangular cross section and provided with two longitudinal grooves are made of pre-molded concrete. 4 - Installation selon les revendications précédentes caractérisée en ce que l'on insère sur la surface du moule un film (7) par exemple en caoutchouc afin de faciliter le démoulage des "nageurs".4 - Installation according to the preceding claims characterized in that one inserts on the surface of the mold a film (7), for example rubber to facilitate the release of "swimmers". 5 - "Nageurs" servant à obtenir le trou de coulée d'un convertisseur sidérurgique obtenu par la mise en oeuvre de l'installation selon l'une quelconque des revendications précédentes caractérisés en ce qu'ils comportent une tige de section droite triangulaire. 5 - "Swimmers" used to obtain the taphole of a steel converter obtained by the implementation of the installation according to any one of the preceding claims, characterized in that they comprise a rod of triangular cross section.
FR9111914A 1991-09-27 1991-09-27 IMPROVEMENTS TO THE SHUTTERS OF A CONVERTER CAST. Expired - Fee Related FR2681804B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9111914A FR2681804B1 (en) 1991-09-27 1991-09-27 IMPROVEMENTS TO THE SHUTTERS OF A CONVERTER CAST.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9111914A FR2681804B1 (en) 1991-09-27 1991-09-27 IMPROVEMENTS TO THE SHUTTERS OF A CONVERTER CAST.

Publications (2)

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FR2681804A1 true FR2681804A1 (en) 1993-04-02
FR2681804B1 FR2681804B1 (en) 1993-11-19

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0625391A1 (en) * 1993-05-15 1994-11-23 Thor Ceramics Limited Fluted stopper
US5400930A (en) * 1993-04-19 1995-03-28 Vesuvius France Slide gate valve having a cementless joint between the valve and a metallurgical vessel
EP1811046A1 (en) 2001-01-16 2007-07-25 Tetron, Inc. Vortex inhibitor with sacrificial rod

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1875256A (en) * 1931-02-02 1932-08-30 George E Nagel Gang mold for fence post construction
EP0037803A1 (en) * 1980-04-01 1981-10-14 Zanda Ab Mold intended for use in the manufacture of concrete roof tiles
GB2188132A (en) * 1986-03-19 1987-09-23 Labate Michael D Slag retaining device for use in converters or ladles
US4799650A (en) * 1987-09-23 1989-01-24 Labate Michael D Slag retaining device with vortex inhibitor
EP0381466A2 (en) * 1989-02-02 1990-08-08 Naphtali Marcus Improvements relating to the production of concrete beams or the like

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1875256A (en) * 1931-02-02 1932-08-30 George E Nagel Gang mold for fence post construction
EP0037803A1 (en) * 1980-04-01 1981-10-14 Zanda Ab Mold intended for use in the manufacture of concrete roof tiles
GB2188132A (en) * 1986-03-19 1987-09-23 Labate Michael D Slag retaining device for use in converters or ladles
US4799650A (en) * 1987-09-23 1989-01-24 Labate Michael D Slag retaining device with vortex inhibitor
EP0381466A2 (en) * 1989-02-02 1990-08-08 Naphtali Marcus Improvements relating to the production of concrete beams or the like

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IRON AND STEEL ENGINEER. vol. 62, no. 5, Mai 1985, PITTSBURGH US pages 55 - 57; G.H. VON DEHN ET AL: 'BOF SLAG RETAINING SYSTEM' *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5400930A (en) * 1993-04-19 1995-03-28 Vesuvius France Slide gate valve having a cementless joint between the valve and a metallurgical vessel
USRE36364E (en) * 1993-04-19 1999-11-02 Vesuvius France Slide gate valve having a cementless joint between the valve and the metallurgical vessel
EP0625391A1 (en) * 1993-05-15 1994-11-23 Thor Ceramics Limited Fluted stopper
EP1811046A1 (en) 2001-01-16 2007-07-25 Tetron, Inc. Vortex inhibitor with sacrificial rod

Also Published As

Publication number Publication date
FR2681804B1 (en) 1993-11-19

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