EP0057946B1 - Abstichvorrichtung für Konverter - Google Patents

Abstichvorrichtung für Konverter Download PDF

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Publication number
EP0057946B1
EP0057946B1 EP82200053A EP82200053A EP0057946B1 EP 0057946 B1 EP0057946 B1 EP 0057946B1 EP 82200053 A EP82200053 A EP 82200053A EP 82200053 A EP82200053 A EP 82200053A EP 0057946 B1 EP0057946 B1 EP 0057946B1
Authority
EP
European Patent Office
Prior art keywords
tapping
blocks
tap hole
converter
disks
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
EP82200053A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0057946A1 (de
Inventor
Rupert Dipl.-Ing. Steinwider
Paul Dipl.-Ing. Weitzer
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.)
Veitscher Magnesitwerke AG
Original Assignee
Veitscher Magnesitwerke 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
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Application filed by Veitscher Magnesitwerke AG filed Critical Veitscher Magnesitwerke AG
Publication of EP0057946A1 publication Critical patent/EP0057946A1/de
Application granted granted Critical
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Expired 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
    • 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
    • C21C5/44—Refractory linings
    • C21C5/445—Lining or repairing the taphole

Definitions

  • the invention relates to a converter tapping with a closed tapping channel, which is composed of refractory blocks or disks, the blocks or disks having openings forming sections of the tapping channel.
  • the tapping channel is arranged in the upper part, usually in the transition area between the cylindrical and the conical converter area.
  • the converter is tilted, the bath level and the layer of slag lying above it lying at a low height above the tapping channel. This bath height is kept essentially constant by tilting the converter during tapping.
  • the conventional converter taps are designed with a continuous cylindrical tapping channel.
  • Such cylindrical tapping channels known from DE-A-1 583 306 and AT-B-326 164 have the disadvantage that disproportionately long tapping times result at the beginning of each new tapping step, which initially decrease rapidly and then proportionally to the final durability.
  • the reason for this is the constriction of the outflowing steel when entering the tapping channel, which is caused by the sharp-edged tapping inlet, according to which the tapping jet separates from the wall of the tapping channel.
  • the tapping beam is accelerated by gravity, which leads to a further reduction in the cross-section of the tapping beam.
  • since essentially only the fire-side part appears as wear resistance in a cylindrical tapping channel there is a high uneven wear and thus a relatively short service life of the entire converter tapping.
  • the tapping channel has a block or a disk on the inlet side with a continuously narrowing funnel-shaped opening and the diameter of the opening of the block or the disk on the cold side of the tapping channel is smaller than on the fire side.
  • the funnel-shaped design of the pouring spout is known, for example from US-A-2193 365, according to which the pouring nozzle is designed with a conically tapered or with a cylindrical, gradually tapered inner cross-section in order to cut through the narrower nozzle parts during the pouring process to achieve an enlargement of the outflow cross-section.
  • DE-B-1 086 402 discloses a floor spout which interacts with a stopper head and which, in order to even out the pouring jet, has a zone which is concave in longitudinal section between the inlet zone which is convex in longitudinal section and the conically tapered outlet zone.
  • the outflow conditions for converter racking and floor spouts of pans and the like differ significantly from one another.
  • the converter tapping has an essentially constant bath height and outflow rate as well as a short outflow time.
  • the floor drain has a strongly changing, i.e. H. initially large and then continuously decreasing bath height and outflow rate as well as a long outflow time and the problem of slag inclusions does not exist.
  • the tapping channel is adapted to the flow conditions of the tapping jet. This considerably reduces wear and the durability of the racking is significantly increased. In particular, there is less widening of the tap run-in towards the end of the tap life, so that the risk of slag being entrained is reduced. Furthermore, the tapping time is shortened by the tapping design according to the invention; H. the tapping cross section can be reduced, which also counteracts the suction effect on the slag. According to the invention, an optimally bundled tapping jet is obtained during the first tapping operations of a new infeed. The better bundling results in less oxidation of the rack jet. This results in a lower consumption of deoxidizing agents and the quality of the jet is improved because it now has fewer inclusions.
  • the diameters of the openings in the blocks or disks of the tapping channel narrow conically in the direction of the cold side.
  • a preferred embodiment of the invention consists in that, with the exception of the block or the disk on the inlet side, the openings of the blocks or disks, as known per se, are cylindrical, but the diameters of the openings narrow in a step-like manner towards the cold side . This results in a tapping channel that is staggered in diameter and that can be assembled from common refractory blocks or disks. The stages in the tapping channel are removed by the first tapping processes wear so that a tapping channel with a completely smooth inner surface is obtained within a very short time.
  • the drawing shows two exemplary embodiments for a converter tapping according to the invention.
  • the top tapping disc 1 consists of several refractory tapping disks.
  • the top tapping disc 1 is designed as an inlet funnel.
  • the two adjoining disks 2 have cylindrical openings, the inside diameter of which is equal to the outlet diameter of the uppermost plate 1.
  • the lower plate 2 is followed by three further disks 3, the openings of which are identical with one another. che diameter.
  • the diameter of the opening of the disks 3 is, however, smaller than that of the opening of the disks 2.
  • only one disk 2, two disks 3 and additionally two disks 4 are used, in which the diameter of the openings is again smaller is that of the perforations of the disks 3.
  • the disks 2, 3 and 4 are common standard products, so that the converter tapping according to the invention is easy to manufacture.
  • the stages 5 resulting between the disks 2, 3 and 4 are removed quickly when the delivery is started during the first tapping operations, so that a conical tapping is obtained within a very short time, which adapts optimally to the tapping jet.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Furnace Charging Or Discharging (AREA)
EP82200053A 1981-02-05 1982-01-18 Abstichvorrichtung für Konverter Expired EP0057946B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT524/81 1981-02-05
AT0052481A AT387039B (de) 1981-02-05 1981-02-05 Abstichvorrichtung fuer konverter

Publications (2)

Publication Number Publication Date
EP0057946A1 EP0057946A1 (de) 1982-08-18
EP0057946B1 true EP0057946B1 (de) 1986-05-14

Family

ID=3492905

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82200053A Expired EP0057946B1 (de) 1981-02-05 1982-01-18 Abstichvorrichtung für Konverter

Country Status (12)

Country Link
US (1) US4427184A (da)
EP (1) EP0057946B1 (da)
JP (1) JPS57145919A (da)
AT (1) AT387039B (da)
BR (1) BR8200598A (da)
CA (1) CA1170450A (da)
DE (2) DE3271083D1 (da)
DK (1) DK151104C (da)
DZ (1) DZ375A1 (da)
ES (1) ES271921Y (da)
TR (1) TR21471A (da)
ZA (1) ZA82358B (da)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4208520A1 (de) * 1992-03-17 1993-09-23 Didier Werke Ag Abstichrohr an einem konverter oder lichtbogenofen
DE102004027440B3 (de) * 2004-06-04 2005-06-16 Refractory Intellectual Property Gmbh & Co. Kg Abstichrohr
DE102004050701B3 (de) * 2004-10-18 2006-04-06 Refractory Intellectual Property Gmbh & Co. Kg Abstichrohr für ein metallurgisches Schmelzgefäß

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4653677A (en) * 1985-04-16 1987-03-31 The Dow Chemical Company Vessel having a molten material outlet
EP0249647B1 (de) * 1986-06-18 1989-05-03 Radex West Gesellschaft mit beschränkter Haftung Feuerfester Ausguss
DE3830342A1 (de) * 1988-09-07 1990-03-15 Radex Heraklith Zweigeteilter endstein
DE3843545A1 (de) * 1988-12-23 1990-06-28 Didier Werke Ag Abstichkanal fuer metallurgische gefaesse
GB9108038D0 (en) * 1991-04-16 1991-06-05 Forgemaster Steels Limited Improved taphole design and method
US6663825B2 (en) 1999-07-19 2003-12-16 Louis A. Grant, Inc. Method and apparatus for installing or replacing a furnace tap hole insert
US8240524B2 (en) * 2008-03-14 2012-08-14 Krosakiharima Corporation Upper nozzle
JP2011062722A (ja) * 2009-09-16 2011-03-31 Kurosaki Harima Corp 溶融金属排出用ノズル
JP5156141B1 (ja) * 2012-07-13 2013-03-06 黒崎播磨株式会社 上ノズルの使用方法
JP6335052B2 (ja) * 2014-07-08 2018-05-30 黒崎播磨株式会社 出鋼口スリーブ
WO2017157444A1 (en) * 2016-03-17 2017-09-21 Refractory Intellectual Property Gmbh & Co. Kg Taphole assembly
CN110195982B (zh) * 2019-06-27 2024-05-10 米易锦秀机械制造有限公司 两段式可拆卸堵头
CN110174001B (zh) * 2019-06-27 2024-07-05 米易锦秀机械制造有限公司 三段式可拆卸堵头

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2193365A (en) * 1937-03-31 1940-03-12 Electrochimie Electrometallurg Pouring nozzle
DE1086402B (de) * 1958-03-20 1960-08-04 Siderurgie Fse Inst Rech Abflussduese fuer Giesspfannen oder sonstige Metallschmelzgefaesse
AT219634B (de) * 1960-07-20 1962-02-12 Voest Ag Tiegel zur Durchführung metallurgischer Prozesse
US3396961A (en) * 1965-08-09 1968-08-13 Gen Refractories Co Precast taphole assembly
AT266892B (de) * 1966-05-27 1968-12-10 Veitscher Magnesitwerke Ag Abstich für metallurgische Gefäße und Verfahren zu seiner Herstellung
DE1984685U (de) * 1967-11-30 1968-05-02 Hagenburger Chamotte Ton Feuerfester ausguss fuer giesspfannen od. dgl.
DE6608495U (de) * 1968-05-22 1971-09-09 Didier Werke Ag Rohrfoermiger formstein fuer abstichkanaele an metallurgischen gefaessen, oefen u. dgl.
AT335492B (de) * 1973-12-20 1977-03-10 Veitscher Magnesitwerke Ag Auswechselbarer abstich fur ein feuerfest ausgekleidetes gefass

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4208520A1 (de) * 1992-03-17 1993-09-23 Didier Werke Ag Abstichrohr an einem konverter oder lichtbogenofen
DE102004027440B3 (de) * 2004-06-04 2005-06-16 Refractory Intellectual Property Gmbh & Co. Kg Abstichrohr
DE102004050701B3 (de) * 2004-10-18 2006-04-06 Refractory Intellectual Property Gmbh & Co. Kg Abstichrohr für ein metallurgisches Schmelzgefäß

Also Published As

Publication number Publication date
DK151104B (da) 1987-11-02
DZ375A1 (fr) 2004-09-13
TR21471A (tr) 1984-06-28
DK48182A (da) 1982-08-06
DK151104C (da) 1988-06-20
JPS57145919A (en) 1982-09-09
ATA52481A (de) 1982-05-15
ES271921Y (es) 1984-04-16
BR8200598A (pt) 1982-12-14
DE8202727U1 (de) 1982-07-08
EP0057946A1 (de) 1982-08-18
AT387039B (de) 1988-11-25
ES271921U (es) 1983-10-16
US4427184A (en) 1984-01-24
JPH0211651B2 (da) 1990-03-15
DE3271083D1 (en) 1986-06-19
ZA82358B (en) 1982-12-29
CA1170450A (en) 1984-07-10

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