EP0561181B1 - Abstichrohr an einem Konverter oder Lichtbogenofen - Google Patents

Abstichrohr an einem Konverter oder Lichtbogenofen Download PDF

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Publication number
EP0561181B1
EP0561181B1 EP93102819A EP93102819A EP0561181B1 EP 0561181 B1 EP0561181 B1 EP 0561181B1 EP 93102819 A EP93102819 A EP 93102819A EP 93102819 A EP93102819 A EP 93102819A EP 0561181 B1 EP0561181 B1 EP 0561181B1
Authority
EP
European Patent Office
Prior art keywords
tap pipe
converter
flow
tapping
height
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 - Lifetime
Application number
EP93102819A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0561181A2 (de
EP0561181A3 (es
Inventor
Hans Rothfuss
Günther Haubold
Dieter Bach
Werner Glasmacher
Dieter Stüsser
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.)
Didier Werke AG
Original Assignee
Didier Werke 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 Didier Werke AG filed Critical Didier Werke AG
Publication of EP0561181A2 publication Critical patent/EP0561181A2/de
Publication of EP0561181A3 publication Critical patent/EP0561181A3/xx
Application granted granted Critical
Publication of EP0561181B1 publication Critical patent/EP0561181B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F27D3/1518—Tapholes

Definitions

  • the invention relates to a tapping tube for a converter or arc furnace, with flow cross sections which are smaller at the height of the outlet zone than in the heights closer to the interior of the converter or arc furnace.
  • tapping tube is described in EP 0 057 946 B1.
  • the flow cross sections of the tapping tube taper in steps from the inlet zone close to the converter to the outlet zone of the tapping tube.
  • the tapping channel should be adapted to the flow conditions of the tapping jet.
  • the object of the invention is to design a tapping tube of the type mentioned at the outset such that it has the same tapping time as possible in the tapping operations to be carried out with it.
  • the flow profile of the tapping tube is adapted to the flow profile of the melt which is set at an average bath level - between 30% and 70% of the maximum bath level.
  • the flow cross sections adapted to the flow profile of the melt and differing in the different heights of the tapping tube can then be determined.
  • the flow cross-sections of the tapping tube are dimensioned accordingly at least in the outlet zone.
  • tapping tube ensures a fairly constant tapping time during these tapping, whereby a considerably improved constancy of the tapping time during the tapping can be seen here, for example during 80
  • tapping times only change between 3.5 min and 5.5 min.
  • Adjusting the flow cross-sections of the tapping tube in the outlet zone to the flow profile can suffice, since the outlet zone essentially determines the tapping time, at least as long as the length of the tapping tube is not reduced by wear of the lining of the converter itself.
  • a converter 1 has a lining 2, in which a tapping tube 3, which projects above it, is seated. Intermediate layers 4, 5 are provided between the tapping tube 3 and the lining 2.
  • a maximum bath level height xm is set in the converter 1.
  • the outlet opening 7 of the tapping tube 3 is at a height x2.
  • the inlet opening 8 of the tapping tube 3 lies at the inlet height x1.
  • the tapping pipe 3 is also worn, so that its current inlet opening 10 is at the inlet height x3, the tapping tube 3 being between the inlet height x3 and the outlet height x2 only has a length 12 that is less than length 11.
  • the bath level height x0 results, which is 30% to 70%, preferably 40% to 50%, of the maximum bath level height xm above the minimum bath level height xu.
  • FIG. 6 shows a maximum cut-off time To, for example 5.5 minutes, and a minimum cut-off time Tu with about 3.5 minutes. Cut-off times between these cut-off times are not metallurgically problematic.
  • FIG. 6 shows the course of the parting times over 80 partitions when using one of the parting tubes according to the invention with a solid line.
  • 80 taps are possible without the tapping time permissible between the limits Tu and To being exceeded.
  • the corresponding course for tapping through a cylindrical tapping tube is shown in FIG. 6 with "-ooo".
  • the cut-off times for the initial cut-offs - up to about the 10th cut-off - are above the maximum cut-off time To and are then already less the minimum parting-off time Tu for the 50th tapping.
  • the characteristic "- + - + - +" is also shown in FIG. 6, which corresponds to the course of a stepped or a purely conical tapping tube according to the prior art.
  • the cut-off time is above the maximum allowable cut-off time To for many initial taps and then is already about 65 taps below the minimum allowable cut-off time Tu.
  • Figure 7 shows another advantage of the invention. This is based on the fact that in the tapping tube according to the invention the allowed tapping time is essentially the same over a large number of taps. In Figure 7 it is assumed that after about 800 taps, converter 1 or its lining 2 must be replaced. The lines shown correspond to FIG. 6. It can be seen that the tapping tube 3 according to the invention only has to be replaced 9 times at 800 taps, whereas a conventional tapping tube with a purely cylindrical flow cross section has to be replaced 17 times and a tapping tube with a stepped cross section 13 times during the 800 taps should be.
  • the intervals between the replacement of the tapping tube 3 are the same and each can be fixed to an equal number of taps, 80 taps in the example, so that the personnel until the converter 1 or its lining 2 are renewed the tapping tube 3 can be renewed again and again after an equal number of taps, whereas with the tapping tubes according to the prior art these periods are continuously shortened, so that the staff has to replace a tapping tube according to the prior art in the case of a more worn converter, than with an even less worn converter.
  • the tapping tube 3 consists of three components 11, 12, 13.
  • the block 11 forms the outlet zone of the tapping tube 3. It is dimensioned in the flow cross sections in its height H1 in such a way that it corresponds to the flow profile So of the melt at this height at an average bath level height x0 with a free melt outlet (see FIG. 4).
  • the building block 12 forming the inlet zone of the tapping tube 3 is dimensioned in the different heights of its flow cross-section so that its flow cross-sections correspond over its height H2 to the flow profile which occurs at a minimum or lower bath level height xu (cf. double-dash-dotted lines in FIG. 5); that is, when the lining 2 of the converter 1 has been used up so far that the wear of the wear line 9 has approximated.
  • the block 13 is designed as a transition block. There are transition modules 13 with different heights H3, whereby in each case the transition module 13 is designed so that it flows or. forms a smooth transition on the inside between the building blocks 11, 12.
  • FIGS. 3 and 5 each show blocks 11 of the same size for the outlet zone and blocks 12 of the same size for the inlet zone. Only the building blocks 13 of the transition zone are designed differently. The different design of the building blocks 13 lies in their height H3, which progresses in the direction of the wear line 9 Wear of the lining 2 of the converter 1 is adjusted. In the event that, as in the example according to FIG. 7, nine replacements of the tapping tube 3 are provided for a converter trip of 800 taps, transition modules 13 nine or ten different lengths H3 are correspondingly provided, which flow-side can be adjusted as smoothly as possible in all cases Connect the same blocks 11 and 12 of the outlet zone and the inlet zone.
  • This design is also favorable because the manufacturer's comparatively few and easily producible block formats are sufficient to provide the tapping tubes required for a converter trip, which guarantee approximately the same parting times.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Discharge Heating (AREA)
EP93102819A 1992-03-17 1993-02-24 Abstichrohr an einem Konverter oder Lichtbogenofen Expired - Lifetime EP0561181B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4208520A DE4208520C2 (de) 1992-03-17 1992-03-17 Abstichrohr an einem Konverter oder Lichtbogenofen
DE4208520 1992-03-17

Publications (3)

Publication Number Publication Date
EP0561181A2 EP0561181A2 (de) 1993-09-22
EP0561181A3 EP0561181A3 (es) 1994-02-02
EP0561181B1 true EP0561181B1 (de) 1996-10-02

Family

ID=6454282

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93102819A Expired - Lifetime EP0561181B1 (de) 1992-03-17 1993-02-24 Abstichrohr an einem Konverter oder Lichtbogenofen

Country Status (6)

Country Link
US (1) US5310164A (es)
EP (1) EP0561181B1 (es)
AT (1) ATE143702T1 (es)
DE (2) DE4208520C2 (es)
ES (1) ES2094946T3 (es)
ZA (1) ZA931903B (es)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19504654A1 (de) * 1995-02-13 1996-08-22 Didier Werke Ag Verfahren und Vorrichtung zur Reparatur eines metallurgischen Gefäßes
GB9819191D0 (en) * 1998-09-04 1998-10-28 Mills Stephen D Unibore interchangable nozzle system
US6350293B1 (en) 1999-02-23 2002-02-26 General Electric Company Bottom pour electroslag refining systems and methods
DE102004027440B3 (de) 2004-06-04 2005-06-16 Refractory Intellectual Property Gmbh & Co. Kg Abstichrohr
CN101959630B (zh) * 2008-03-14 2013-03-27 黑崎播磨株式会社 上浇注嘴
CN115537497B (zh) * 2022-10-20 2023-03-10 营口理工学院 抗涡流冲刷的电炉用ebt出钢口尾砖及其制备方法和应用

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT387039B (de) * 1981-02-05 1988-11-25 Veitscher Magnesitwerke Ag Abstichvorrichtung fuer konverter
US4634106A (en) * 1984-06-18 1987-01-06 Labate Ii Michael D Device for placing slag retention means in tapping converter
US4756452A (en) * 1986-11-13 1988-07-12 Shinagawa Refractories Co., Ltd. Molten metal pouring nozzle
DE3843545A1 (de) * 1988-12-23 1990-06-28 Didier Werke Ag Abstichkanal fuer metallurgische gefaesse
NL8902101A (nl) * 1989-08-21 1991-03-18 Hoogovens Groep Bv Metallurgisch vat, alsmede een daarbij toe te passen ringvormige steen.

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
G.Wahrig, Deutsches Wörterbuch, 1991 (Jubiläumsausgabe) Bertelsmann-Lexikonverlag, Gütersloh DE, seite 898 *
STAHL UND EISEN. Bd. 105, Nr. 14 , 22. Juli 1985 , DUSSELDORF DE Seiten 765 - 769 DIETRICH SUCKER ET AL. 'Strömungsuntersuchungen für schmelzmetallurgische Prozesse' *

Also Published As

Publication number Publication date
EP0561181A2 (de) 1993-09-22
EP0561181A3 (es) 1994-02-02
DE59304013D1 (de) 1996-11-07
ES2094946T3 (es) 1997-02-01
US5310164A (en) 1994-05-10
DE4208520C2 (de) 1994-10-27
ATE143702T1 (de) 1996-10-15
ZA931903B (en) 1993-10-06
DE4208520A1 (de) 1993-09-23

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