WO1993020246A1 - Procede et dispositif visant a eviter la contamination de l'acier de coulee par le laitier de decrassage dans un convertisseur basculant - Google Patents

Procede et dispositif visant a eviter la contamination de l'acier de coulee par le laitier de decrassage dans un convertisseur basculant Download PDF

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Publication number
WO1993020246A1
WO1993020246A1 PCT/DE1993/000311 DE9300311W WO9320246A1 WO 1993020246 A1 WO1993020246 A1 WO 1993020246A1 DE 9300311 W DE9300311 W DE 9300311W WO 9320246 A1 WO9320246 A1 WO 9320246A1
Authority
WO
WIPO (PCT)
Prior art keywords
weight
plug
converter
tap hole
tapping
Prior art date
Application number
PCT/DE1993/000311
Other languages
German (de)
English (en)
Inventor
Berthold Stilkerieg
Friedhelm Breier
Original Assignee
Berthold Stilkerieg
Friedhelm Breier
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
Priority claimed from DE19924211593 external-priority patent/DE4211593C2/de
Priority claimed from DE9213704U external-priority patent/DE9213704U1/de
Application filed by Berthold Stilkerieg, Friedhelm Breier filed Critical Berthold Stilkerieg
Priority to BR9306202A priority Critical patent/BR9306202A/pt
Priority to DE59301739T priority patent/DE59301739D1/de
Priority to AU38871/93A priority patent/AU671447B2/en
Priority to PL93305073A priority patent/PL172861B1/pl
Priority to EP93907776A priority patent/EP0635071B1/fr
Priority to JP50797893A priority patent/JP3252909B2/ja
Publication of WO1993020246A1 publication Critical patent/WO1993020246A1/fr

Links

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

Definitions

  • the invention relates to a device for closing the tap hole of a tiltable converter with a sealing plug which consists of a heat-resistant mass, a front plate facing towards the inside of the converter, which melts when liquid steel strikes it, and a setting device via which the plug can be inserted into the tap hole and is deformable against the wall thereof.
  • the invention also relates to a method for operating a converter and thereby for the uniform and slag-free discharge of the liquid steel, a plug consisting of plastic material being inserted as deep as possible into the tap hole connecting the inner wall and outer wall and being fixed there.
  • tiltable converters At a suitable point in the converter wall above the bath level, tiltable converters have an outlet opening or a tap hole for transferring the liquid steel into the tap pan. For emptying, the converter is tilted into such a position that the steel flows through the tap hole into the downstream pan. Since specifically lighter slag of different viscosities always floats on the molten metal, it necessarily reaches the tap hole during the tipping process and thus more or less large amounts of feed slag into the tapping pan. For numerous subsequent metallurgical processes, the presence of slag which is rich in oxygen and often enriched with phosphorus or sulfur is a considerable disadvantage. There is therefore a requirement to transfer the converter steel into the tapping pan with as little slag as possible. As is known, this is achieved in that the tap hole of the converter is temporarily closed
  • Spare sheet becomes.
  • a number of systems which should only release the tap hole when the slag has been led past the tap during the tipping process.
  • slide systems are known as a closure mechanism, but they cannot prevent feed slag from getting into the tapping channel because they are flush with the outer wall of the converter.
  • plugs made of different materials or material combinations have previously been arranged outside in the tap hole or driven into the tap hole (AT-PS-355 070, AT-PS-257 665).
  • Combinations of fibrous materials with solids, plastic clay materials, wooden plugs and pitch plugs are also known for the outer placement, and combinations of sheet metal with a refractory material coating and possibly additional clay material coating and claws for fixing in the tap hole (EP-A-0 315 311, US-A-4 877 221, WO 90/06377, US-A-4 399 986 and EP-A-0 260 735).
  • the known plugs Due to the technically required conical or funnel-like shape of the tap holes and the progressive wear of the refractory materials in this area, the known plugs cause uncontrollable and consequently disadvantageous behavior due to premature failure of the protective function against preliminary slag contamination. As a result, larger quantities of preliminary slag are often transferred to the pan despite the appropriate safeguards.
  • a considerable risk to the operating team is associated with the use of these sealing plugs.
  • the invention is therefore based on the object of specifying an easy-to-use closure device which compensates for the changes in the tap hole and a method which reliably prevents the transfer of large amounts of converter feed slag into the pan.
  • the object is achieved in that the sealing plug has a cylindrical, highly plastic core, that the cylinder cover surfaces are covered by the face plate and a base plate, that the face plate is displaceably connected to the setting device against the base plate and is formed into a funnel channel, which pierces the sealing plug or core and is shaped to receive a pulling claw acting on the end plate.
  • the converter can be tilted, the end plate and also the funnel channel now melting when the molten steel is touched, and the steel can flow through the funnel channel in a precisely targeted manner into the pan. Since the remaining part of the sealing plug, with the exception of the edges, is not sintered, it is discharged or rinsed out quickly and without problems, the small amount of plug material for the further processing of the steel not being a hindrance.
  • the different operating modes and operating conditions of a converter have no negative influence on the full functional and protective effect of the converter even after the sealing plug has remained in the tapping tube for several hours.
  • the permanent and temporary binders contained in the refractory material of the sealing plug also prevent premature decomposition of the residual mass.
  • the cap formed towards the inside of the converter is stable enough to safely guide the slag over the rack when the converter is tilted. It only breaks when the ferrostatic pressure is applied.
  • An advantageously uniform mass for the sealing plug is that in which the cylindrical core consists of refractory material with a grain size of less than 3 mm, binding agent and plasticizer and plasticizer.
  • the cylindrical core can consist of raw materials based on silicon, aluminum, magnesium oxide or silicate in a suitable composition. However, a mixture of is preferred as the refractory material
  • plasticizer 0.5 to 3% by weight plasticizer
  • This fire-resistant material has a bulk density of 0.8 to 0.9 kg / dm 3 and is therefore much lighter than conventional materials used for this purpose. It is advantageous if silicates are used as permanent binders, cellulose material as temporary binders, polyelectrolytic alcohol as plasticizers and as a liquefied fatty acid. This creates a material that ensures that the stopper is effectively fixed in the tap hole during deformation without any continuous sintering. The residual mass is protected against disintegration even when exposed to appropriate heat.
  • the end plate used is made of heat-resistant material and is funnel-shaped and convex in the direction of the smaller opening, the smaller opening opening into the funnel channel.
  • This funnel channel is extended through the stopper and is used to guide the setting tool for squeezing the sealing plug and to center the emerging pouring stream at the moment of tapping to avoid a shower effect on the flowing steel.
  • the funnel channel can have different diameters. In the embodiment according to the invention, the diameters are 25-38 mm.
  • the cross section of the funnel channel can deviate from the circular shape.
  • the funnel channel is designed to merge beyond the base plate into the setting tool in order to make it easier to insert the claw.
  • the invention further provides that the setting tool has an adjustable lock which specifies the thickness of the remaining plug, in order in this way to ensure the exact setting of the sealing plug in the transition zone to the converter interior.
  • a method is used to operate a converter of the high * safety standard, in which the stopper is inserted into the tap hole up to the inner wall of the converter and then from the bottom side and at the same time is deformed through a center hole from the top side until it lies tight against the hole wall.
  • a particularly effective method is that in which the stopper is positioned in the transition zone to the converter interior with the aid of a seating device which grips it from the underside and the top, and is placed by squeezing while keeping the center hole open.
  • the stopper can be loaded evenly from both sides, so that the uniform abutment on the inner wall of the tapping tube already mentioned above is ensured.
  • the plastic material of the stopper is made of 20 to 40% by weight of insulating clay silicate, 20 to 40% by weight of binder clay, 0 to 30% by weight of water, 5 to 20% by weight.
  • % Mineral oil 0.1 to 3% by weight plasticizer (polyelectrolytic alcohol), 0.1 to 2% by weight plasticizer (fatty acid), 0.1 to 2% by weight temporary binder (cellulose) and 0.1 to 5% by weight of permanent binders (silicates) mixed together, formed into a cylindrical body and then pierced with the funnel channel of a funnel-shaped squeeze plate and then placed on the setting device and inserted and fixed in the tap hole becomes.
  • FIG. 1 perspective side view of a
  • Fig. 2 section through a converter in the tap hole with inserted plug (a seated device)
  • Fig. 3 section through a converter in the tap hole with inserted and squeezed sealing plug.
  • the slag feed stopper generally designated (1) in the figures, has a cylindrical shape.
  • the cross section of this sealing plug (8) can deviate from the circular shape.
  • the sealing plug (8) consists of a fire-resistant material and has a funnel-shaped baffle plate (2) on the inside of the converter, which has an elongated funnel channel (5) guided through the sealing plug (8).
  • the refractory material of the sealing plug consists of 35% by weight of alumina silicate, 35% by weight of binder clay, 20% by weight of water, 6.5% by weight of mineral oil, 0.2% by weight of plasticizer, 0.3% by weight of plasticizer, 0.5% by weight of temporary binder and 2.5% by weight of permanent binder.
  • FIG. 2 shows how the plug (8) is inserted into the tap hole (10) with the aid of the setting tool.
  • the base plate (4) of the setting tool which is matched to the diameter of the tap hole (10), lies on the side (7) opposite the crushing plate or end plate (2).
  • a claw (6) is guided according to FIG. 2 through the funnel channel (5) to above the funnel and initially has the task of holding the sealing plug (8) until it is finally positioned in the tap hole (10).
  • the sealing plug (8) is inserted with the aid of the setting device into the tap hole (10) to such an extent that it has a squish plate surface, i.e. that is, the surface of the end plate (2) is almost flush with the inside of the converter (9).
  • the pulling claw (6) is pulled onto the end plate (2) via the lever system of the setting tool, whereby pressure is exerted on the plug material, which deforms until the diameter of the tap hole (10) is completely filled.
  • a crushed plug (8) in the tap hole (10) is shown.
  • the thickness of the stopper bottom or remaining stopper (12) in FIG. 3 is always maintained for each tapping diameter of a converter with the aid of the setting device, so that a reproducible opening behavior is ensured.
  • Stopper material not required to fill the tapping diameter is attached to the tapping wall with the help of the baffle plate or end plate (2). Fig. 3 pressed.
  • the end plate (2) melts and sinters with the refractory material to form a solid cap (see FIG. 3).
  • This cap keeps the blowing pressure and the occurring Vibrations and shocks stood.
  • the remaining refractory, insulating material solidifies to such an extent that it remains stable in the tap hole (8). Sintering with the wall of the tap hole (8) does not take place.
  • the sintered cap is so stable that, when the converter is tilted, it reliably guides the forward slag over the tap hole (8) and only breaks in under the ferrostatic pressure. Remaining plug material is discharged through the flowing steel within a few seconds.

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)
  • Furnace Details (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

L'invention concerne un procédé et un dispositif visant à éviter de manière efficace que l'acier de coulée d'un convertisseur ne soit contaminé par le laitier de décrassage. On utilise à cet effet un bouchon de fermeture (1, 8) déformable et plastique, réalisé dans un matériau réfractaire, contenant silicales et des oxydes ainsi que des liants appropriés. Le bouchon (1, 8) est inséré à l'aide d'un appareil de positionnement dans la coulée, de sorte que sa surface avant, fermée par une tôle déformable (2, 5) en cône soit pratiquement à fleur de la face intérieure du convertisseur, qu'il remplisse complètement le diamètre du trou de coulée (10) par déformation et constitue de ce fait un plan tel que le laitier de décrassage présent lors du basculage du convertisseur est acheminé en toute efficacité au-dessus de la coulée. Le nouveau bouchon (1, 8) plastique convient, en raison du procédé utilisé, à une vaste gamme de diamètres de trous de coulée. L'acier liquide qui s'écoule ensuite par le canal du cône enlève rapidement le bouchon, de manière que l'acier s'écoule de façon ciblée dans la poche de coulée.
PCT/DE1993/000311 1992-04-07 1993-04-01 Procede et dispositif visant a eviter la contamination de l'acier de coulee par le laitier de decrassage dans un convertisseur basculant WO1993020246A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BR9306202A BR9306202A (pt) 1992-04-07 1993-04-01 Processo e dispositivo para prevençao de contaminaçao do aço de sangria por escorias precursoras em um conversor basculável
DE59301739T DE59301739D1 (de) 1992-04-07 1993-04-01 Verfahren und vorrichtung zur vermeidung von kontamination des abstichstahles durch vorlaufschlacke bei einem kippbaren konverter
AU38871/93A AU671447B2 (en) 1992-04-07 1993-04-01 Process and device for preventing contamination of the tapping steel by flush slag in a tipping converter
PL93305073A PL172861B1 (pl) 1992-04-07 1993-04-01 splywajacym zuzlem w konwertorze przechylnym PL
EP93907776A EP0635071B1 (fr) 1992-04-07 1993-04-01 Procede et dispositif visant a eviter la contamination de l"acier de coulee par le laitier de decrassage dans un convertisseur basculant
JP50797893A JP3252909B2 (ja) 1992-04-07 1993-04-01 転炉のフラッシュスラグで湯出し鋼の汚染を防止する方法と装置

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DEP4211593.0 1992-04-07
DE19924211593 DE4211593C2 (de) 1992-04-07 1992-04-07 Vorrichtung zum Verschließen des Abstichloches eines kippbaren Konverters
DE9213704U DE9213704U1 (de) 1992-10-10 1992-10-10 Konverter mit plastischem Schlackenvorlaufstopfen
DEG9213704.0U 1992-10-10
DEG9215646.0U 1992-11-17
DE9215646U DE9215646U1 (de) 1992-04-07 1992-11-17 Vorrichtung zur Vermeidung von Kontamination des Abstichstahles durch Vorlaufschlacke bei einem kippbaren Konverter

Publications (1)

Publication Number Publication Date
WO1993020246A1 true WO1993020246A1 (fr) 1993-10-14

Family

ID=27203617

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1993/000311 WO1993020246A1 (fr) 1992-04-07 1993-04-01 Procede et dispositif visant a eviter la contamination de l'acier de coulee par le laitier de decrassage dans un convertisseur basculant

Country Status (10)

Country Link
EP (1) EP0635071B1 (fr)
JP (1) JP3252909B2 (fr)
AT (1) ATE134708T1 (fr)
AU (1) AU671447B2 (fr)
BR (1) BR9306202A (fr)
DE (1) DE59301739D1 (fr)
ES (1) ES2085154T3 (fr)
HU (1) HU217016B (fr)
PL (1) PL172861B1 (fr)
WO (1) WO1993020246A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2344159A (en) * 1998-10-17 2000-05-31 Berthold Stilkerieg Deformable tap hole sealing plug for a tiltable converter
EA008129B1 (ru) * 2005-04-04 2007-04-27 Бертхольд Стилкериг Устройство для эпизодического запирания лётки конвертера с улучшенными свойствами заглушки
RU212669U1 (ru) * 2022-04-22 2022-08-02 Игорь Александрович Ложкин Стопор для отсечки первичного конвертерного шлака

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4989422B2 (ja) * 2007-10-30 2012-08-01 ニコー物産株式会社 スラグ流出防止用プラグ
DE102008039142A1 (de) 2008-08-21 2010-02-25 Stilkerieg, Berthold, Dipl.-Ing. Verschlussstopfen für kippbare Konverter
DE102013002623A1 (de) 2013-02-18 2014-08-21 Veronica Stilkerieg Stopfen für das zeitweise Verschließen des Konverterabstichloches
CN107324822A (zh) * 2017-07-15 2017-11-07 山西建龙实业有限公司 一种钢渣与渣盆分离剂
DE102020102105A1 (de) 2020-01-29 2021-07-29 Veronica Stilkerieg Verschlussstopfen für Konverterabstichlöcher

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT257665B (de) 1964-08-03 1967-10-25 Voest Ag Vorrichtung zum Verschließen des Abstiches bei Aufblasetiegeln oder sonstigen metallurgischen Öfen
LU71494A1 (fr) * 1974-12-16 1976-11-11
DE2549728B1 (de) 1975-11-06 1977-03-03 Salzgitter Peine Stahlwerke Vorrichtung zum verschliessen des abstichloches eines konverters
US4399986A (en) 1981-12-14 1983-08-23 Collins William J Device for plugging a taphole in a furnace
EP0260735A1 (fr) 1986-09-08 1988-03-23 Hoogovens Groep B.V. Fermeture pour trou de coulée d'un convertisseur d'aciérie et procédé pour son opération
DE8805975U1 (de) 1988-05-05 1988-06-23 Wertz, Heinz, 4000 Düsseldorf Verschlußvorrichtung für das Abstichloch eines kippbaren Abstichkonverters
EP0315311A1 (fr) 1987-10-16 1989-05-10 Foseco International Limited Procédé et dispositif pour boucher le trou de coulée d'un récipient métallurgique
US4877221A (en) 1988-12-05 1989-10-31 Tri-Star Manufacturing & Service, Inc. Expandable tap hole plug
WO1990006377A1 (fr) 1988-12-01 1990-06-14 Goricon Metallurgical Services Limited Perfectionnements apportes a des cuves d'acierie

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT257665B (de) 1964-08-03 1967-10-25 Voest Ag Vorrichtung zum Verschließen des Abstiches bei Aufblasetiegeln oder sonstigen metallurgischen Öfen
LU71494A1 (fr) * 1974-12-16 1976-11-11
DE2549728B1 (de) 1975-11-06 1977-03-03 Salzgitter Peine Stahlwerke Vorrichtung zum verschliessen des abstichloches eines konverters
AT355070B (de) 1975-11-06 1980-02-11 Salzgitter Peine Stahlwerke Vorrichtung zum verschliessen des abstichloches eines konverters
US4399986A (en) 1981-12-14 1983-08-23 Collins William J Device for plugging a taphole in a furnace
EP0260735A1 (fr) 1986-09-08 1988-03-23 Hoogovens Groep B.V. Fermeture pour trou de coulée d'un convertisseur d'aciérie et procédé pour son opération
EP0315311A1 (fr) 1987-10-16 1989-05-10 Foseco International Limited Procédé et dispositif pour boucher le trou de coulée d'un récipient métallurgique
DE8805975U1 (de) 1988-05-05 1988-06-23 Wertz, Heinz, 4000 Düsseldorf Verschlußvorrichtung für das Abstichloch eines kippbaren Abstichkonverters
WO1990006377A1 (fr) 1988-12-01 1990-06-14 Goricon Metallurgical Services Limited Perfectionnements apportes a des cuves d'acierie
US4877221A (en) 1988-12-05 1989-10-31 Tri-Star Manufacturing & Service, Inc. Expandable tap hole plug

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2344159A (en) * 1998-10-17 2000-05-31 Berthold Stilkerieg Deformable tap hole sealing plug for a tiltable converter
TR199902386A3 (tr) * 1998-10-17 2000-11-21 Stilkerieg Dipl.-Ing.Berthold Daha iyi hale getirilmis malzeme karisimi ile egilebilen konverterde ön ayrisan maden posasi araciligi tarafindan döküm çeliginin radyoaktif maddelerle kirlenmesinin azaltilmasi için düzenek.
GB2344159B (en) * 1998-10-17 2002-11-06 Berthold Stilkerieg Sealing device for a tiltable converter
DE19848004B4 (de) * 1998-10-17 2006-10-12 Stilkerieg, Berthold, Dipl.-Ing. Vorrichtung zur Vermeidung von Kontamination des Abstichstahles durch Vorlaufschlacke bei einem kippbaren Konverter mit verbesserter Materialzusammensetzung
CN100354434C (zh) * 1998-10-17 2007-12-12 伯索尔德·施蒂尔克里希 用材料成分的改善来避免初渣混入排出钢水的装置
EA008129B1 (ru) * 2005-04-04 2007-04-27 Бертхольд Стилкериг Устройство для эпизодического запирания лётки конвертера с улучшенными свойствами заглушки
RU212669U1 (ru) * 2022-04-22 2022-08-02 Игорь Александрович Ложкин Стопор для отсечки первичного конвертерного шлака

Also Published As

Publication number Publication date
EP0635071A1 (fr) 1995-01-25
HU217016B (hu) 1999-11-29
JPH07508070A (ja) 1995-09-07
PL172861B1 (pl) 1997-12-31
DE59301739D1 (de) 1996-04-04
ES2085154T3 (es) 1996-05-16
ATE134708T1 (de) 1996-03-15
HUT67839A (en) 1995-05-29
AU3887193A (en) 1993-11-08
JP3252909B2 (ja) 2002-02-04
BR9306202A (pt) 1998-06-23
EP0635071B1 (fr) 1996-02-28
AU671447B2 (en) 1996-08-29

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