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EP0248742B1 - Verfahren zum Reinigen der Abstichöffnung bei einem Stahlwerksofen mit Erkerabstich - Google Patents

Verfahren zum Reinigen der Abstichöffnung bei einem Stahlwerksofen mit Erkerabstich Download PDF

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Publication number
EP0248742B1
EP0248742B1 EP87420119A EP87420119A EP0248742B1 EP 0248742 B1 EP0248742 B1 EP 0248742B1 EP 87420119 A EP87420119 A EP 87420119A EP 87420119 A EP87420119 A EP 87420119A EP 0248742 B1 EP0248742 B1 EP 0248742B1
Authority
EP
European Patent Office
Prior art keywords
tap hole
plane
cutting tool
edge
cutting
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.)
Expired
Application number
EP87420119A
Other languages
English (en)
French (fr)
Other versions
EP0248742A1 (de
Inventor
Régis Szezesny
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.)
Vallourec SA
Original Assignee
Vallourec SA
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 Vallourec SA filed Critical Vallourec SA
Priority to AT87420119T priority Critical patent/ATE48186T1/de
Publication of EP0248742A1 publication Critical patent/EP0248742A1/de
Application granted granted Critical
Publication of EP0248742B1 publication Critical patent/EP0248742B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces
    • F27B3/10—Details, accessories or equipment, e.g. dust-collectors, specially adapted for hearth-type furnaces
    • F27B3/19—Arrangements of devices for discharging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/15—Tapping equipment; Equipment for removing or retaining slag

Definitions

  • the method and the device according to the invention relate to the cleaning of the pouring orifice of a steel arc furnace, comprising a lateral zone equipped with a pouring orifice from the bottom.
  • Such ovens include, in the vicinity of the steel melting zone, a pouring zone, arranged laterally, and provided with a pouring orifice which opens out below the furnace.
  • the casting of such an oven is carried out by tilting the oven towards the side of this casting zone, the metal then flowing very quickly, after opening the valve closing the pouring orifice, in a pocket located below. After casting, the oven is returned to its initial position and the bag is removed.
  • casting residues form protuberances which remain attached to the outer annular edge of the casting aperture protrusions which must be removed before closing the shutter valve of the casting aperture for the next use of the furnace .
  • the means used, in the usual way, to remove these growths which require time to be implemented, such as steel bars provided with cutting ends are not very effective and tend to damage the refractory lining of this orifice. casting and all the more so as these growths have time to cool.
  • the internal radiation emitted by this orifice does not facilitate this cleaning work.
  • This method and this device generally apply to steel furnaces comprising a lateral pouring zone provided with a bottom pouring orifice.
  • a cutting tool is passed, below this orifice, so that the cutting edge of this tool moves in a plane substantially parallel to the plane tangent to the outer annular edge of this orifice, as close as possible to this edge, the length of this cutting edge and its course being determined so that it completely crosses the space which is in front of the pouring orifice.
  • the length of the cutting edge is at least equal to the outside diameter of the annular edge of the pouring orifice.
  • the cutting tool is passed in front of the pouring orifice less than 30 seconds and preferably of the order of 10 seconds after the completion of the casting.
  • the device which is also the subject of the invention is used to remove the protuberances formed on the outer annular edge of the pouring orifice.
  • the cutting tool provided with a cutting edge which has just been described, is fixed to one end of an arm, the other end of which is secured to a control rod mounted in rotation on bearings.
  • the axis of this rod is substantially perpendicular to the plane tangent to the outer annular edge of the pouring orifice and the cutting tool is fixed to the arm, so that, as has been said above, its cutting edge is in a plane parallel to said tangent plane and as close as possible to it.
  • An operating means makes it possible to rotate the control rod, thereby driving the arm which carries the cutting tool, so that the cutting edge of the latter completely crosses the space which is in front of the pouring orifice. .
  • the cutting tool cuts the protuberances which adhere to the annular edge of the pouring orifice and extend downwards the plane in which the cutting edge of this cutting tool moves.
  • an adjustment means makes it possible to adjust the distance between the cutting plane and the plane tangent to the outer annular edge of the casting orifice so that the cutting edge of the cutting tool passes just below the orifice. without hitting its annular edge.
  • the means for operating the control rod is at least one actuator which makes it possible to rotate this rod by the desired angle so that the cutting tool cuts through the protuberances fixed to the annular edge of the pouring orifice, and which also allows the same cutting tool to return to its starting position.
  • At least the cutting edge of the preferably bevelled cutting tool is made of any material suitable for cutting out protuberances formed from such solid residues.
  • It can be made of ordinary steel or for example of tool steel, or of stainless or refractory steel. It may also include added cutting parts.
  • Figure 1 is a schematic top view of a steel arc furnace (1) with three electrodes (2) having a lateral casting zone (3).
  • This lateral zone equipped like the melting zone with a cover, comprises a pouring orifice (4) visible in section in FIG. 2.
  • a partial section of the outer envelope (5) reveals the lining. as a refractory (6) which surrounds the pouring orifice (4).
  • the annular outer edge (7) of this orifice is of revolution about the axis (X1-X1).
  • This tool (9) is a kind of knife, as shown in FIG. 3, the cutting edge (10) of which is in a plane parallel to the plane tangent to the annular edge (7) of the pouring orifice. The distance between these two planes is as small as possible, so that the growths can be cut as close as possible to the annular edge (7) to which they are attached.
  • the cutting tool (9) is fixed to an arm (11) rotatably mounted around the axis (X2-X2) of the control rod (12).
  • This axis (X2-X2) is perpendicular to the plane tangent to the annular edge (7).
  • the control rod (12) is rotatably mounted on two bearings (13-14) fixed to the wall (5) of the oven. This rotation is caused by an operating means constituted by a double-acting jack (15), the body of which is connected by a joint, in a known manner to the wall (5) of the furnace and the rod of which is connected by another articulation, in a manner also known to a lever (16) mounted at a right angle on the control rod (12) so as to be able to drive it in rotation.
  • the angular position and the length of the lever (16), the stroke of the jack (15), the angular position and the length of the arm (11), are determined so that the actuation of the jack (15) drives the arm ( 11) which moves in the direction of the arrow (F) the cutting tool from its starting position shown in (9) to its end of stroke position shown in dashes in (17).
  • the cutting edge (10) cuts all the growths which it meets which extend downwards, the plane in which it moves.
  • the length of the arm (11) is such that the cutting edge (10) passes in front of the pouring orifice (4) over its entire section.
  • the length of this cutting edge is at least equal to the diameter of the pouring orifice (4) and preferably greater than this diameter.
  • the length of the cutting edge (10) is greater than the outside diameter (D) of the annular edge (7) of the pouring orifice (4) as seen in FIG. 3. This makes it possible to cut the growths attached to this annular edge (7) particularly effectively.
  • the cutting tool is operated less than 30 seconds and advantageously of the order of 10 seconds after the end of the casting. The cutting tool is then returned to its initial position.
  • the cutting tool is made of beveled ordinary steel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Cleaning In General (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Processing Of Solid Wastes (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Detergent Compositions (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Claims (5)

1. Verfahren zum Reinigen der Abstichöffnung (4) am Boden eines Stahlwerksofens (1), mit einer seitlichen Abstichzone (3), die eine Beseitigung der durch Gießrückstände gebildeten Auswüchse ermöglicht, die an der äußeren Ringkante (7) dieser Abstichöffnung haften, dadurch gekennzeichnet, daß man ein Schneidwerkzeug (9) direkt unterhalb dieser Abstichöffnung derart durchtreten läßt, daß sich die Schneidkante (10) dieses Schneidwerkzeugs in einer zur äußeren Ringkante (7) dieser Abstichöffnung tangentialen Ebene (18) parallelen Ebene verlagert und vor dieser Abstichöffnung über deren ganzen Querschnitt vorbeistreicht.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man das Schneidwerkzeug vor der Abstichöffnung weniger als 30 Sekunden nach dem Ende des Abstichs vorbeistreichen läßt.
3. Vorrichtung zum Reinigen der Abstichöffnung (4) am Boden eines Stahlwerksofens (1) mit einer seitlichen Abstichzone (3), die eine Beseitigung der durch Gießrückstände gebildeten Auswüchse ermöglicht, die an der äußeren Ringkante (7) dieser Abstichöffnung haften, dadurch gekennzeichnet, daß sie ein Schneidwerkzeug (9) aufweist, das an einem der Enden eines Arms (11) befestigt ist, dessen anderes Ende kraftschlüssig mit einer auf Lagern (13, 14) drehbar montierten Steuerstange (12) verbunden ist, wobei die Achse (X2-X2) dieser Steuerstange ungefähr senkrecht zur äußeren Ringkante (7) der Abstichöffnung tangentialen Ebene (18) ist und das Werkzeug am Arm derart befestigt ist, daß seine Schneidkante (10) ebenfalls in einer zur Achse (X2-X2) der Steuerstange senkrechten Ebene ist, und daß ein Betätigungsmittel (15) es ermöglicht, die Steuerstange sich derart drehen zu lassen, daß das Schneidwerkzeug (9) mithilfe des Arms (11) angetrieben wird, so daß seine Schneidkante (10) völlig den Ringraum der sich vor der Abstichöffnung (4) befindet, durchqueren kann, um die Auswüchse abzutrennen, die nach unten die Ebene überschreiten, in der sich diese Schneidkante verschieben kann.
4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß ein Mittel zur Höhenregulierung des Arms (11) parallel zur Achse (X2-X2) ermöglicht, den Abstand zwischen der Ebene, die die Schneidkante des Schneidwerkzeugs enthält, und der zur Ringkante der Abstichöffnung tangentialen Ebene (18) zu justieren.
3. Vorrichtung nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß das Betätigungsmittel, das das Drehenlassen der Steuerstange ermöglicht, eine Winde (15) ist.
EP87420119A 1986-05-06 1987-05-04 Verfahren zum Reinigen der Abstichöffnung bei einem Stahlwerksofen mit Erkerabstich Expired EP0248742B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87420119T ATE48186T1 (de) 1986-05-06 1987-05-04 Verfahren zum reinigen der abstichoeffnung bei einem stahlwerksofen mit erkerabstich.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8607012A FR2598437B1 (fr) 1986-05-06 1986-05-06 Procede et dispositif pour le nettoyage de l'orifice de coulee d'un four d'acierie a coulee laterale par le fond
FR8607012 1986-05-06

Publications (2)

Publication Number Publication Date
EP0248742A1 EP0248742A1 (de) 1987-12-09
EP0248742B1 true EP0248742B1 (de) 1989-11-23

Family

ID=9335285

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87420119A Expired EP0248742B1 (de) 1986-05-06 1987-05-04 Verfahren zum Reinigen der Abstichöffnung bei einem Stahlwerksofen mit Erkerabstich

Country Status (5)

Country Link
EP (1) EP0248742B1 (de)
AT (1) ATE48186T1 (de)
DE (1) DE3761031D1 (de)
ES (1) ES2011817B3 (de)
FR (1) FR2598437B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007058446A1 (de) * 2007-12-05 2009-06-10 Siemens Ag Ofen und Reinigungseinrichtung für einen Ofen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8231869U1 (de) * 1982-11-10 1983-10-13 Mannesmann Ag, 4000 Duesseldorf Kippbarer Lichtbogenofen
FR2555719B1 (fr) * 1983-11-24 1988-05-13 Clecim Sa Dispositif de fermeture d'un trou de coulee
AT381583B (de) * 1984-06-01 1986-11-10 Voest Alpine Ag Kippbares metallurgisches gefaess

Also Published As

Publication number Publication date
ES2011817B3 (es) 1990-02-16
FR2598437B1 (fr) 1989-05-26
DE3761031D1 (en) 1989-12-28
FR2598437A1 (fr) 1987-11-13
ATE48186T1 (de) 1989-12-15
EP0248742A1 (de) 1987-12-09

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