EP1373583B1 - Vorrichtung zur verhinderung des mitfliessens von schlacke beim abstich einer metallschmelze - Google Patents

Vorrichtung zur verhinderung des mitfliessens von schlacke beim abstich einer metallschmelze Download PDF

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Publication number
EP1373583B1
EP1373583B1 EP02735019A EP02735019A EP1373583B1 EP 1373583 B1 EP1373583 B1 EP 1373583B1 EP 02735019 A EP02735019 A EP 02735019A EP 02735019 A EP02735019 A EP 02735019A EP 1373583 B1 EP1373583 B1 EP 1373583B1
Authority
EP
European Patent Office
Prior art keywords
pipe
channels
vessel
alternate
tapping
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
EP02735019A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1373583A1 (de
Inventor
Horst Siek
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.)
Georgsmarienhuette GmbH
Original Assignee
Georgsmarienhuette GmbH
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 Georgsmarienhuette GmbH filed Critical Georgsmarienhuette GmbH
Publication of EP1373583A1 publication Critical patent/EP1373583A1/de
Application granted granted Critical
Publication of EP1373583B1 publication Critical patent/EP1373583B1/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
    • B22D43/001—Retaining slag during pouring molten metal
    • 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
    • F27D3/1545—Equipment for removing or retaining slag
    • F27D3/159—Equipment for removing or retaining slag for retaining slag during the pouring of the metal or retaining metal during the pouring of the slag
    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/0003—Linings or walls
    • F27D1/003—Linings or walls comprising porous bricks
    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
    • F27D1/1621—Making linings by using shaped elements, e.g. bricks
    • 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
    • F27D3/16—Introducing a fluid jet or current into the charge
    • F27D2003/161—Introducing a fluid jet or current into the charge through a porous element
    • 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

Definitions

  • the invention relates to a device for preventing the co-flow of sips when tapping a molten metal from a metallurgical vessel.
  • These vessels may be, for example, but not exclusively, those for steel production so one. Converter or act around the vessel of an electric furnace.
  • Such a vessel offers in plan view a roughly oval or pear shape, wherein the tapping opening is provided in the tapered front bottom area. In the normal position, i. before tapping, the melt level is about 1 m to 1.50 m above the tapping opening.
  • This tap hole is clogged with a filler and closed at the bottom by means of a slider.
  • the filling material forms over the tapping opening a projecting into the container interior hill.
  • the vessel For the tapping, ie for the transfer of the melt into the ladle, in which the steel is subjected to secondary metallurgy process, the vessel is pivoted to the tapping position, so that the tapping now the deepest portion of the vessel forms. In this position, the slide is opened and the backfill material removed in the tap hole.
  • the effluent melt forms a vortex (vortex effect) above the tapping opening, which entrains the slag floating on the melt by the suction effect, which is undesirable for metallurgical reasons.
  • the invention is therefore based on the object, a Vorrichung of the type mentioned and as they are approximately from the EP 0 097 610 A1 emerges so educate that the elimination of the aforementioned whirl effect is possible in a simple manner.
  • the invention solves the problem according to the characterizing part of claim 1, characterized in that in the tube wall at least in the opening in the vessel interior exchange tube axially extending, opening at the two end faces of the tube channels are provided on the side facing away from the Geäßinnenraum pipe end with a gas supply are connected.
  • gas is introduced from below through the bottom of the pan into the Blow melt injected to produce a circulation process of the melt, so that a homogenization of the melt temperature and dissolved in the melt alloy components is achieved.
  • these purging stones are surrounded by a metal shell.
  • the height of the steel mirror in the ladle above the sinks is up to 4 m.
  • the tapping opening in the vessel of an electric furnace is formed by so-called exchange tubes, of which a plurality of one above the other form the downwardly narrowing opening.
  • exchange tubes are made of magnesite, corundum concrete or similar refractory materials.
  • Abstichumraungssteine Surround these exchange tubes by Abstichumraungssteine, between the exchangeable tubes and Abstichumraungssteinen a gap exists, which is filled with a refractory material.
  • This system is completed by a so-called cup stone.
  • the opening of the cupstone is closed by means of a slider.
  • the gas supply begins.
  • the gas exiting the channels removes the mound formed from backfill above the tap hole.
  • the slider is pivoted away below the cupstone and the backfill material is removed within the tap hole.
  • the melt can now flow out into the pan, with the mentioned vortex forming above the tapping opening.
  • the gas flowing into the melt similar to the rinsing process in the ladle above the channel openings, forms the described "bald head", which means that in this area the slag is forced outwards and is prevented from flowing through the tapping opening into the ladle.
  • the channels are all arranged one above the other. Pull through the exchange tubes, however, is preferably provided to provide only the top or the top two of the exchange tubes with channels. These two uppermost exchange tubes can also be integrally formed and thus form a unit.
  • the lowest channel leading exchange tube is provided on its underside with an annular space in which all channels open, and in which the gas supply pipe opens, for example, in the area between the exchangeable pipes and the surrounding Abstichumrahmungssteinen is guided.
  • the existing gap between the two elements can be used or it is provided a groove in the outside of the channelless exchange tubes.
  • claims 10 and 11 suggest alternatively either to place the metallic shell of the metallurgical vessel at the same electrical potential as the gas supply pipes or according to claim 11, the gas supply pipes against the metallurgical Isolate vessel potential.
  • the vessel of an electric furnace for steelmaking is shown in longitudinal section and generally designated by the reference numeral 1.
  • the vessel 1 in about pear shape, with the tapping opening 4 is located at the tapered end 2 in the bottom 3 of the vessel 1.
  • the anode 5 is arranged in the approximately central region of the bottom 3. The cathode and the lid of the vessel are not shown.
  • the vessel 1 is tiltable about an axis perpendicular to the paper passing through the axis.
  • this vessel 1 mainly scrap is melted down, wherein the melt reaches the designated 6 height after the melting process.
  • FIG. 2 shows the tapping system with the tapping opening 4 on a larger scale.
  • This tapping system is constructed of five superimposed alternating tubes 7, 7 'in the present case, whose opening diameter becomes smaller towards the bottom.
  • the tapping is completed below by means of a cup block 10, the opening of which is closed by means of a slide, not shown.
  • the top two exchangeable tubes 7 ' have axially extending channels 11 arranged in the tube wall, which establish a connection between the interior of the vessel 1 and an annular space 12 which is provided on the underside of the lower exchangeable tube 7'.
  • annular space 12 opens a gas supply line 13 which leads between the exchangeable tubes 7 and the Abstichumrahmungssteinen 8 down and is guided obliquely outwards between the bottom Abstichumrahmungsstein 8 and the cup stone.
  • FIG. 3 shows a possible embodiment of an exchangeable tube 7 'is shown.
  • This exchange tube 7 ' is constructed in two parts, namely an inner part 14 which is conical, wherein the outer shell of this cone narrows upwards.
  • This inner cone 14 is inserted in an outer part 15 whose inner surface is complementary to the outer surface of the inner cone 14.
  • FIG. 4c A plan view of such a removable tube 7 'is shown in Fig. 4c.
  • the channels 11 for the gas guide are formed here by molded into the outer surface of the inner cone 14 grooves.
  • FIGS. 4a and 4b Further possible embodiments of the channels can be seen in FIGS. 4a and 4b.
  • the channels 11 are formed as radially arranged slots, while the channels 11 are formed in the example of Fig. 4b by a plurality of holes.
  • channels in star form or the like are possible, for example channels in star form or the like.
  • the vessel 1 is tilted forward, so that the tapping opening 4 forms the lowest part of the vessel 1.
  • a so-called "bald head" i. an area where the slag is forced sideways.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Furnace Details (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Continuous Casting (AREA)
  • Discharge Heating (AREA)
EP02735019A 2001-04-05 2002-03-27 Vorrichtung zur verhinderung des mitfliessens von schlacke beim abstich einer metallschmelze Expired - Lifetime EP1373583B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10117181A DE10117181C1 (de) 2001-04-05 2001-04-05 Verfahren und Vorrichtung zur Verhinderung des Mitfließens von Schlacke beim Abstich einer Stahlschmelze
DE10117181 2001-04-05
PCT/DE2002/001117 WO2002081759A1 (de) 2001-04-05 2002-03-27 Verfahren und vorrichtung zur verhinderung des mitfliessens von schlacke beim abstich einer metallschmelze

Publications (2)

Publication Number Publication Date
EP1373583A1 EP1373583A1 (de) 2004-01-02
EP1373583B1 true EP1373583B1 (de) 2007-06-20

Family

ID=7680629

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02735019A Expired - Lifetime EP1373583B1 (de) 2001-04-05 2002-03-27 Vorrichtung zur verhinderung des mitfliessens von schlacke beim abstich einer metallschmelze

Country Status (27)

Country Link
US (1) US6951296B2 (zh)
EP (1) EP1373583B1 (zh)
JP (1) JP4029046B2 (zh)
KR (1) KR100544529B1 (zh)
CN (1) CN1204274C (zh)
AT (1) ATE365230T1 (zh)
AU (1) AU2002311073B2 (zh)
BR (1) BR0204753B1 (zh)
CA (1) CA2410799C (zh)
CY (1) CY1106838T1 (zh)
CZ (1) CZ301430B6 (zh)
DE (3) DE10117181C1 (zh)
DK (1) DK1373583T3 (zh)
DZ (1) DZ3348A1 (zh)
EA (1) EA004341B1 (zh)
ES (1) ES2289105T3 (zh)
HU (1) HUP0300903A2 (zh)
MX (1) MXPA02011714A (zh)
NO (1) NO20025825L (zh)
NZ (1) NZ522964A (zh)
PL (1) PL197434B1 (zh)
PT (1) PT1373583E (zh)
SK (1) SK286449B6 (zh)
TW (1) TW528806B (zh)
UA (1) UA73994C2 (zh)
WO (1) WO2002081759A1 (zh)
ZA (1) ZA200210336B (zh)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004027440B3 (de) * 2004-06-04 2005-06-16 Refractory Intellectual Property Gmbh & Co. Kg Abstichrohr
US8210402B2 (en) 2009-02-09 2012-07-03 Ajf, Inc. Slag control shape device with L-shape loading bracket
EP2998672A1 (de) * 2014-09-17 2016-03-23 Refractory Intellectual Property GmbH & Co. KG Abstich an einem metallurgischen Gefäss, insbesondere einem Elektrolichtbogenofen
CN106978519A (zh) * 2017-04-21 2017-07-25 东北大学 一种吹氩气防止钢包出钢过程中漩涡卷渣的方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU84213A1 (fr) * 1982-06-18 1983-11-23 Arbed Dispositif pour vidanger des recipients metallurgiques
CA1206752A (fr) 1982-06-18 1986-07-02 Jean Goedert Procede et dispositif pour vidanger des recipients metallurgiques
JPS59126713A (ja) 1983-01-08 1984-07-21 Tokyo Yogyo Co Ltd 炉底出鋼式電炉
DE3743575A1 (de) * 1987-12-22 1989-07-13 Krupp Gmbh Verfahren zum abstechen einer metallschmelze und metallurgisches gefaess zur durchfuehrung des verfahrens
JPH01201410A (ja) 1988-02-08 1989-08-14 Nkk Corp 精錬炉からの出鋼時における溶融スラグの流出防止方法
US4840355A (en) * 1988-07-13 1989-06-20 Labate M D Slag controlling device for basic oxygen furnaces
JPH10176212A (ja) * 1996-12-18 1998-06-30 Sumitomo Metal Ind Ltd 溶鋼の排出時におけるスラグ流出防止方法
JPH11279620A (ja) * 1998-03-31 1999-10-12 Kawasaki Steel Corp 転炉の出鋼時間調整方法
DE19916232A1 (de) * 1999-04-10 2000-10-12 Sms Demag Ag Verfahren und Vorrichtung zum Abstechen von Metallschmelzen aus metallurgischen Schmelzgefäßen
DE10034370A1 (de) 2000-07-14 2002-01-24 Sms Demag Ag Verfahren zum Verschließen oder Öffnen des Abstichloches eines metallurgischen Gefäßes, insbesondere eines Elektrolichtbogenofens und zugehöriger Bodenabstich

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
ZA200210336B (en) 2003-04-17
PT1373583E (pt) 2007-08-28
PL358060A1 (en) 2004-08-09
DE50210350D1 (de) 2007-08-02
NO20025825D0 (no) 2002-12-04
US6951296B2 (en) 2005-10-04
NO20025825L (no) 2002-12-04
CA2410799C (en) 2009-09-22
US20030137085A1 (en) 2003-07-24
CZ20024002A3 (cs) 2003-06-18
CY1106838T1 (el) 2012-05-23
UA73994C2 (en) 2005-10-17
DE10291492D2 (de) 2004-04-15
WO2002081759A1 (de) 2002-10-17
EP1373583A1 (de) 2004-01-02
CN1460124A (zh) 2003-12-03
BR0204753B1 (pt) 2011-09-06
SK286449B6 (sk) 2008-10-07
PL197434B1 (pl) 2008-03-31
KR100544529B1 (ko) 2006-01-23
KR20030016280A (ko) 2003-02-26
NZ522964A (en) 2004-09-24
WO2002081759A9 (de) 2003-02-06
DE10117181C1 (de) 2002-10-31
DK1373583T3 (da) 2007-11-26
SK17002002A3 (sk) 2003-05-02
MXPA02011714A (es) 2004-05-17
AU2002311073B2 (en) 2005-04-07
JP2004518940A (ja) 2004-06-24
ATE365230T1 (de) 2007-07-15
BR0204753A (pt) 2003-04-29
ES2289105T3 (es) 2008-02-01
EA200201265A1 (ru) 2003-04-24
JP4029046B2 (ja) 2008-01-09
EA004341B1 (ru) 2004-04-29
TW528806B (en) 2003-04-21
DZ3348A1 (fr) 2002-10-17
CN1204274C (zh) 2005-06-01
WO2002081759A8 (de) 2002-12-19
CZ301430B6 (cs) 2010-02-24
CA2410799A1 (en) 2002-11-27
HUP0300903A2 (en) 2003-07-28

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