EP0010535B1 - Dispositif de fermeture du trou de coulée d'un récipient métallurgique - Google Patents

Dispositif de fermeture du trou de coulée d'un récipient métallurgique Download PDF

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Publication number
EP0010535B1
EP0010535B1 EP79890039A EP79890039A EP0010535B1 EP 0010535 B1 EP0010535 B1 EP 0010535B1 EP 79890039 A EP79890039 A EP 79890039A EP 79890039 A EP79890039 A EP 79890039A EP 0010535 B1 EP0010535 B1 EP 0010535B1
Authority
EP
European Patent Office
Prior art keywords
tap hole
metallurgical vessel
closure
lining
closure body
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
EP79890039A
Other languages
German (de)
English (en)
Other versions
EP0010535A1 (fr
Inventor
Manfred Eysn
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.)
Voestalpine AG
Original Assignee
Voestalpine 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 Voestalpine AG filed Critical Voestalpine AG
Publication of EP0010535A1 publication Critical patent/EP0010535A1/fr
Application granted granted Critical
Publication of EP0010535B1 publication Critical patent/EP0010535B1/fr
Expired 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/12—Opening or sealing the tap holes
    • 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

Definitions

  • a device for closing the tap hole of a metallurgical vessel in which a closure body which can be inserted into the tap hole and leaves an annular gap opposite the tap hole wall and contains a compressed gas line is provided, which preferably has a tapering opening for the discharge of the compressed gas line Has outer jacket.
  • Such a device is used to make a separation of metal and slag when tapping, the known device is particularly easy to use and can be used repeatedly, u. even if the wall of the tap hole is already subject to wear.
  • the known device in the closed position of the closure body, ambient air flows through the annular gap into the tap hole according to the injector principle, the size of the annular gap being of crucial importance with regard to the sealing effect. If the wall of the tap hole wears out, the diameter of the tap hole increases, so that more ambient air is sucked in towards the end of a converter trip, which reduces the sealing effect of the closure device, or is only maintained by an increased blowing of compressed air into the tap hole can.
  • the invention aims to improve the known device, u. in the respect that ongoing repairs to keep the original diameter of the taphole the same during a converter journey are no longer required, so that the lining can be subject to wear and tear without reducing the sealing effect of the closure device.
  • the tap hole is stepped outward widening, the part of the tap hole having a larger diameter than the part of the tap hole delimited by the brickwork of the metallurgical vessel being formed by an annular hollow body, the inner ring wall of which forms the outer casing of the closure body surrounds peripherally with a radial distance and open at least one inlet and outlet for a coolant in the cavity.
  • the hollow body is in the form of an annular plate which lies closely against the brick lining of the metallurgical vessel.
  • the circular ring plate also serves to support the bricking of the tap hole.
  • Fig. 1 shows a section through the fresh vessel while pouring a molten steel into the ladle, also shown in section.
  • Fig. 2 shows a section through the closed tap hole along its axis on an enlarged scale.
  • the steel melt 2 with the slag layer 3 floating on it is located in the fresh vessel designated 1.
  • the steel flows through the tap hole 4 into the ladle 5 below.
  • a closure body 7 fastened to a swivel arm 6 serves to close the pressurized gas line 8 is connected.
  • the swivel arm 6 is articulated on the outer casing 9 of the fresh vessel 1 and can be swiveled by means of a pressure medium cylinder 10 which can be actuated in both directions and which is likewise articulated on the outer casing of the vessel.
  • the closure body 7 has an outer jacket 11 which tapers towards the mouth.
  • the tap hole 4 is stepped outwards in a step-like manner, the part 13 of the tap hole 4, which has a smaller diameter 12 in the newly bricked fresh vessel, being formed by the lining 14 of the fresh vessel 1, and the part 16 having a larger diameter 15 Tap hole 4 is delimited by an annular and plate-shaped hollow body 17 which is fastened to a flange 18 of the outer jacket 9 of the fresh vessel 1.
  • a coolant flows through the cavity 19 of the hollow body 17, the line 20 serving as a feed line and the line 21 serving as a discharge line.
  • the inner ring wall 22 surrounds the outside of the vessel, the pivoted in the closed position (Fig. 2) closure body 7 peripherally with the distance b, so that an annular gap 23 is formed between the closure body 7 and the hollow body 17. Stops 24 provided on the swivel arm 6 secure the closed position of the closure body relative to the tap hole 4 and prevent the shutter body from being pivoted too far into the tap hole.
  • the tap hole is closed as follows: as soon as the steel has flowed into the ladle 5, the slag 3 flows out through the tap hole 4.
  • a ratio pyrometer 25 through which the outflowing beam 26 is observed, a pulse is obtained when changing from steel to slag, which actuates a relay 28 via an amplifier 27, which then switches on an electrical signal the solenoid valves 31, 32, 33 installed in the supply lines 29, 30, 8 of the pressure medium cylinder 10 and the closure body 7.
  • the solenoid valve 32 is opened, whereby the pressure medium cylinder 10 brings the swivel arm 6 into the closed position shown in Fig.
  • the solenoid valve 33 of the supply line of the closure body is actuated, whereby the closure body, in the position shown in Fig.
  • annular gap 23 is always ensured between the tap hole wall and the closure body 7, which, even with worn brick lining 14 of the tap hole, which is shown in FIG. 2 with dashed lines 34, the suction of always the same amount Ambient air guaranteed.
  • the diameter 15 of the inner ring wall 22 of the hollow body 17 is chosen larger than the diameter 12 of the part 13 of the tap hole, which is formed by the lining 14, contact of the inner ring wall 22 with melt or slag and thus damage to the inner ring wall is prevented, so that even at the end of a converter journey, the tap hole can be closed just as well as at the beginning of a newly bricked converter.
  • the dimension a is chosen so large that a difference in the diameter of the inner ring wall 22 and the part 13 of the tap hole is also ensured at the end of the converter journey

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Furnace Charging Or Discharging (AREA)

Claims (2)

1. Dispositif de fermeture du trou de coulée d'un récipient métallurgique, pour la séparation du métal et du laitier, avec un corps de fermeture pouvant être enfoncé dans le trou de coulée qui laisse libre une fente annulaire par rapport à la paroi du trou de coulée et qui contient une conduite de gaz sous pression, corps qui présente de préférence une paroi extérieure se rétrécissant vers l'orifice de la conduite de gaz sous pression, caractérisé en ce que le trou de coulée (4) est étagé en escalier en s'élargissans vers l'extérieur, la partie (16) du trou de coulée qui présente un plus grand diamètre (15) comparativement à la partie (13) du trou de coulée qui est limitée par le garnissage (14) du récipient métallurgique (1) étant formée par un corps creux annulaire (17) dont la paroi annulaire intérieure (22) entoure la paroi extérieure du corps de fermeture (7) sur sa périphérie, avec un écartement radial (b) et dans la cavité (19) duquel débouchent au moins une conduite d'amenée (20) et une conduite d'évacuation (21) pour un milieu de refroidissement.
2. Dispositif selon la revendication 1, caractérisé en ce que le corps creux (17) présente la forme d'une plaque en couronne de cercle qui est appliquée joint étanche contre le garnissage (14) du récipient métallurgique.
EP79890039A 1978-10-24 1979-10-02 Dispositif de fermeture du trou de coulée d'un récipient métallurgique Expired EP0010535B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT7606/78 1978-10-24
AT760678A AT359535B (de) 1978-10-24 1978-10-24 Einrichtung zum verschliessen des stichloches eines metallurgischen gefaesses

Publications (2)

Publication Number Publication Date
EP0010535A1 EP0010535A1 (fr) 1980-04-30
EP0010535B1 true EP0010535B1 (fr) 1982-06-02

Family

ID=3597746

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79890039A Expired EP0010535B1 (fr) 1978-10-24 1979-10-02 Dispositif de fermeture du trou de coulée d'un récipient métallurgique

Country Status (7)

Country Link
US (1) US4261554A (fr)
EP (1) EP0010535B1 (fr)
JP (1) JPS5558312A (fr)
AT (1) AT359535B (fr)
CA (1) CA1111245A (fr)
DE (1) DE2963022D1 (fr)
SU (1) SU871725A3 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4850001A (en) * 1987-07-20 1989-07-18 Shell Oil Company Orifice blockage detection system
WO1995025209A1 (fr) * 1994-03-14 1995-09-21 John Arnhart Procede et dispositif de positionnement de boulons d'ancrage a l'interieur d'un moule a beton
AT407399B (de) * 1999-05-21 2001-02-26 Voest Alpine Ind Anlagen Verfahren zum verschliessen und öffnen eines stichloches eines metallurgischen gefässes
AT408965B (de) * 2000-01-27 2002-04-25 Voest Alpine Ind Anlagen Einrichtung zum verschliessen eines abstichloches eines metallurgischen gefässes
RU2168390C1 (ru) * 2000-04-04 2001-06-10 Открытое акционерное общество "Новолипецкий металлургический комбинат" Способ и устройство охлаждения затвора сталеразливочного ковша
EP3546599A1 (fr) * 2018-03-29 2019-10-02 Primetals Technologies Austria GmbH Bouchon de scories pneumatique
AT523251A1 (de) * 2019-12-13 2021-06-15 Fill Gmbh Verfahren zum Gießen von Schmelze mittels eines Schmelzebehälters in welchem ein Schmelzeaufnahmeraum ausgebildet ist

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU61204A1 (fr) * 1970-06-26 1972-03-24
CA997142A (en) * 1973-09-27 1976-09-21 Noranda Mines Limited Furnace tapping method and apparatus
AT350090B (de) * 1975-12-17 1979-05-10 Voest Ag Verfahren und einrichtung zum verschliessen des stichloches eines metallurgischen gefaesses
GB1559527A (en) * 1976-08-03 1980-01-23 Flogates Ltd Pouring of molten metals

Also Published As

Publication number Publication date
DE2963022D1 (en) 1982-07-22
ATA760678A (de) 1980-04-15
AT359535B (de) 1980-11-10
CA1111245A (fr) 1981-10-27
US4261554A (en) 1981-04-14
EP0010535A1 (fr) 1980-04-30
SU871725A3 (ru) 1981-10-07
JPS5558312A (en) 1980-05-01

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