EP1172162A1 - Procédé de fermeture et d'ouverture d'un orifice pour décharger un réservoir métallurgique, en particulier pour un four à arc - Google Patents

Procédé de fermeture et d'ouverture d'un orifice pour décharger un réservoir métallurgique, en particulier pour un four à arc Download PDF

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Publication number
EP1172162A1
EP1172162A1 EP01116086A EP01116086A EP1172162A1 EP 1172162 A1 EP1172162 A1 EP 1172162A1 EP 01116086 A EP01116086 A EP 01116086A EP 01116086 A EP01116086 A EP 01116086A EP 1172162 A1 EP1172162 A1 EP 1172162A1
Authority
EP
European Patent Office
Prior art keywords
linear slide
tapping
slide
space
filling compound
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Withdrawn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
EP01116086A
Other languages
German (de)
English (en)
Inventor
Dieter Figge
Reinhard Dr. Fuchs
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.)
SMS Siemag AG
Original Assignee
SMS Demag AG
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 SMS Demag AG filed Critical SMS Demag AG
Publication of EP1172162A1 publication Critical patent/EP1172162A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F27D3/1509—Tapping equipment
    • 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
    • B22D41/44—Consumable closure means, i.e. closure means being used only once
    • B22D41/46—Refractory plugging masses
    • 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
    • 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; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to 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
    • F27D3/1509—Tapping equipment
    • F27D3/1536—Devices for plugging tap holes, e.g. plugs stoppers

Definitions

  • the invention relates to a method for closing or opening the tap hole a metallurgical vessel, in particular an electric arc furnace, which is in a vertical vessel position for tapping the molten metal, below Use of a slide lock and the associated floor cut.
  • Electric arc furnace vessels are currently equipped with an oriel attachment, in which the tap hole is outside. Tapping the molten metal (liquid steel) can only be done by tilting the vessel towards the Oriel attachment, with a slider being opened at the tap hole. Before the Slider plate is sand as a filling compound, which the metal melt before Freezing to the slide plate should prevent. The sand gets into the tapping channel from above (usually by hand), as long as the oven has not yet tilted, if it has to be tilted at all for parting off.
  • Another method of closing the bottom of a metallurgical Vessel consists in introducing one mixed with a binder flowable material in the bottom tapping opening (EP 0 624 769 A1).
  • the Combustion residue from the binder clogs the tap hole and becomes prevented from trickling out by a mechanical shut-off device. at the shut-off device is, however, only a conventional plate.
  • the invention has for its object the sealing and reopening of the tapping channel, i.e. to make it clearer and repeatable.
  • the object is achieved according to the invention in that after exiting of a parting process, an upper linear slide is first closed and then Drain the rest of the molten metal under the upper linear slide lower linear slide is closed and then the Space between the upper linear slide and the lower linear slide with pourable filling compound filled in a short time and after filling the upper linear slide is opened again.
  • the filled in mass does not have to be to displace a liquid steel column.
  • the introduction of the filling compound e.g. of Sands, takes place only after overcoming the frictional resistance in a transport channel a grant.
  • the tapping channel always remains fully open.
  • the energy expenditure is small for the conveying of the filling mass and the effect achieved in contrast, very large.
  • the problem of damage to slide plates described above occurs therefore not on because between the slide plate and the molten steel Layer of the filling compound lies.
  • the service life of a slide plate is at least an entire week with an electric arc furnace operation.
  • the main advantage of the invention is that if the described are observed Procedure, using the upper slide plate only for a very short time Liquid steel comes into contact, then the storage space is filled with filling compound and the upper slide can be opened so that it does not damage the upper slide plate can come.
  • the lower slide plate is through anyway the filling compound protected.
  • a time saving in the sense of undesired wetting of the upper linear slide is achieved after further steps in that the filling compound under High pressure is fed into the space between the linear slides.
  • the desired temperature equalization over the upper linear slide can also be supported by other measures by Perforated brick heater switched on in addition to the introduction of inert gas becomes.
  • the task at hand is for a bottom tapping for a metallurgical vessel, especially for an electric arc furnace, which occurs when tapping the molten metal is in a vertical vessel position, with a closure device, which has a slide plate, solved according to the invention in that two independently operable linear slides with one under the tap opening vertical distance arranged one above the other in a common housing are with their tapping channels on a common tapping axis.
  • the upper linear slide is only exposed to the molten metal and protects the lower linear slide until one is inserted on the lower linear slide to be filled.
  • the space between the linear slides with filling compound is refillable. This allows the load of the metal column from the upper linear slide be collected until the filling compound builds up on the lower linear slide is, after which only the lower linear slide is protected by the Filling mass, the load of the metal column and the upper linear slide again remains in its protected location.
  • the time for transferring the load of the metal column from the upper linear slide The lower linear slide can be built up quickly thanks to the filling compound on the lower linear slide can be shortened by adding to the space between a high-pressure conveyor for a free-flowing filling compound is connected to the linear slides is.
  • the high pressure conveyor for the free-flowing filling compound to a storage container in a conveyor channel connected screw conveyor has that in the conveying direction behind the screw conveyor a shut-off device that blocks or releases the delivery channel is arranged and that in a perpendicular to the conveyor channel High-pressure duct, which is connected to the space between the linear slides, A high-pressure piston-cylinder unit is arranged opposite the room is. This enables the filling compound to enter the space between the linear slides in the shortest possible time be fed in, which relieves the load on the upper linear slide can be. The upper linear slide protects the lower linear slide during this time before the influence of the molten metal.
  • a heating device and / or one or more sink stones in the perforated brick intended for the introduction of inert gas for the purpose of bath mixing and bath movement are. This can provide supportive protection for the upper linear slide in the short period of time when the filling mass is built up in the space between the linear slides be achieved.
  • the bottom tapping is operated in a process that involves closing or opening the tap hole 2 for tapping the molten metal 3 in a vertical direction Vessel position allowed. After a parting process is finished first the upper linear slide 5 closed and after leakage of the remaining molten metal 3 the lower linear slide 6. Then the space 7 between the upper linear slide 5 and the lower linear slide 6 with free-flowing Filling compound 8, e.g. Sand, filled in a short time and after filling the upper linear slide 5 opened again. The one in the vessel 1 during melting Metal melt 3 formed is then based on that located in room 7 Filling compound 8 and thus onto the lower linear slide 6.
  • free-flowing Filling compound 8 e.g. Sand
  • the time for closing the upper linear slide 5 is considerably reduced, by pressing the filling compound 8 into space 7 under high pressure.
  • a Flush 9 which are used as one of the perforated stones 10 in the bottom of the vessel can, inert gas for a bath movement of the molten metal 3 from top to bottom blown in for heat exchange.
  • Temperature conditions can one of the perforated bricks 10 with a heating device 11 be equipped so that heat is still supplied by means of the heating device 11 can be to freeze the tap hole and thus bake to avoid solidifying molten metal 3.
  • the space 7 under the tap opening 12 is separated by a vertical distance 13 formed between the upper linear slide 5 and the lower linear slide 6, both linear slides 5 and 6 from a common housing 14 are enclosed.
  • the space 7 is formed by the column of the tap opening 12 and is (Fig. 1) connected to a high pressure conveyor 16.
  • the high pressure conveyor 16 is shown in more detail in FIG. 2.
  • a Shut-off device 20 is provided, which is designed as a slide plate 20a. In the There is a through opening 20b in the slide plate 20a.
  • the slide plate 20a is by means of a first lever mechanism 24 via a hydraulic cylinder 23 moved back and forth on a frame in the direction of the arrow.
  • Fig. 2 the closed position is drawn.
  • Arrives in the open position of the slide plate 20a the sand or another filling compound 8 in a high-pressure channel 21, which via a Pressure pipe 25 shoots the sand into room 7.
  • a high-pressure piston-cylinder unit 22 which also has a second lever gear 26 and a second piston-cylinder unit 27 the acceleration Sand transfers.
  • the liquid steel can be the feed channel 18 for the filling compound 8 do not damage.
  • Fast filling is among other things through the mutual Delivery channels 18 guided to the center axis are reached when the closing piston 28 is moved in the direction of the arrow. In the open position, the filling compound 8 enter the tap channel 3a and fill it.
  • the closing piston 28 is used for Closing the compaction of the filling compound 8.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
EP01116086A 2000-07-14 2001-07-03 Procédé de fermeture et d'ouverture d'un orifice pour décharger un réservoir métallurgique, en particulier pour un four à arc Withdrawn EP1172162A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2000134370 DE10034370A1 (de) 2000-07-14 2000-07-14 Verfahren zum Verschließen oder Öffnen des Abstichloches eines metallurgischen Gefäßes, insbesondere eines Elektrolichtbogenofens und zugehöriger Bodenabstich
DE10034370 2000-07-14

Publications (1)

Publication Number Publication Date
EP1172162A1 true EP1172162A1 (fr) 2002-01-16

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EP01116086A Withdrawn EP1172162A1 (fr) 2000-07-14 2001-07-03 Procédé de fermeture et d'ouverture d'un orifice pour décharger un réservoir métallurgique, en particulier pour un four à arc

Country Status (2)

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EP (1) EP1172162A1 (fr)
DE (1) DE10034370A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002081759A1 (fr) * 2001-04-05 2002-10-17 Georgsmarienhütte Gmbh Procede et dispositif pour eviter que des scories ne soient entrainees lors de la percee d'un metal en fusion
WO2011009579A1 (fr) 2009-07-20 2011-01-27 Fuchs Technology Holding Ag Dispositif d’étanchéification et de remplissage d’un four métallurgique, four métallurgique et procédé de percée d’un four métallurgique
DE102009033934B3 (de) * 2009-07-20 2011-02-03 Fuchs Technology Holding Ag Abdicht- und Verfüllvorrichtung für einen metallurgischen Ofen, metallurgischer Ofen und Verfahren zum Abstechen eines metallurgischen Ofens
DE102012209504A1 (de) 2012-06-05 2013-12-05 Sms Siemag Ag Verfahren zum Öffnen und Schließen einer Abstichöffnung eines metallurgischen Schmelzgefäßes und metallurgisches Schmelzgefäß

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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2737691A1 (de) * 1977-08-20 1979-03-01 Didier Werke Ag Schiebeverschluss
DE2834643A1 (de) * 1978-08-08 1980-02-28 Detalle Abflussregulierender schieberverschluss
DE3230646C1 (de) * 1982-08-13 1983-10-20 Mannesmann AG, 4000 Düsseldorf Verfahren und Vorrichtung zum Verschließen des Abstichloches eines feststehenden, nicht kippbaren Elektro-Metallschmelzofens
EP0624769A1 (fr) * 1993-05-13 1994-11-17 MANNESMANN Aktiengesellschaft Procédé et dispositif pour fermer le trou de coulée dans le fond d'un récipient métallurgique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2737691A1 (de) * 1977-08-20 1979-03-01 Didier Werke Ag Schiebeverschluss
DE2834643A1 (de) * 1978-08-08 1980-02-28 Detalle Abflussregulierender schieberverschluss
DE3230646C1 (de) * 1982-08-13 1983-10-20 Mannesmann AG, 4000 Düsseldorf Verfahren und Vorrichtung zum Verschließen des Abstichloches eines feststehenden, nicht kippbaren Elektro-Metallschmelzofens
EP0624769A1 (fr) * 1993-05-13 1994-11-17 MANNESMANN Aktiengesellschaft Procédé et dispositif pour fermer le trou de coulée dans le fond d'un récipient métallurgique

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002081759A1 (fr) * 2001-04-05 2002-10-17 Georgsmarienhütte Gmbh Procede et dispositif pour eviter que des scories ne soient entrainees lors de la percee d'un metal en fusion
US6951296B2 (en) 2001-04-05 2005-10-04 Georgsmarienhütte Gmbh Method and device for preventing slag from flowing along when tapping a molten metal
WO2011009579A1 (fr) 2009-07-20 2011-01-27 Fuchs Technology Holding Ag Dispositif d’étanchéification et de remplissage d’un four métallurgique, four métallurgique et procédé de percée d’un four métallurgique
DE102009033934B3 (de) * 2009-07-20 2011-02-03 Fuchs Technology Holding Ag Abdicht- und Verfüllvorrichtung für einen metallurgischen Ofen, metallurgischer Ofen und Verfahren zum Abstechen eines metallurgischen Ofens
DE102012209504A1 (de) 2012-06-05 2013-12-05 Sms Siemag Ag Verfahren zum Öffnen und Schließen einer Abstichöffnung eines metallurgischen Schmelzgefäßes und metallurgisches Schmelzgefäß
WO2013182395A1 (fr) 2012-06-05 2013-12-12 Sms Siemag Ag Procédé d'ouverture et de fermeture d'un trou de coulée d'une cuve de fusion métallurgique et cuve de fusion métallurgique
US9200846B2 (en) 2012-06-05 2015-12-01 Sms Group Gmbh Method for opening and closing a tapping opening of a metallurgical smelting vessel and metallurgical smelting vessel

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