EP0635071A1 - Process and device for preventing contamination of the tapping steel by flush slag in a tipping converter. - Google Patents

Process and device for preventing contamination of the tapping steel by flush slag in a tipping converter.

Info

Publication number
EP0635071A1
EP0635071A1 EP93907776A EP93907776A EP0635071A1 EP 0635071 A1 EP0635071 A1 EP 0635071A1 EP 93907776 A EP93907776 A EP 93907776A EP 93907776 A EP93907776 A EP 93907776A EP 0635071 A1 EP0635071 A1 EP 0635071A1
Authority
EP
European Patent Office
Prior art keywords
weight
plug
converter
tap hole
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.)
Granted
Application number
EP93907776A
Other languages
German (de)
French (fr)
Other versions
EP0635071B1 (en
Inventor
Berthold Stilkerieg
Friedhelm Breier
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.)
Individual
Original Assignee
Individual
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/en
Priority claimed from DE9213704U external-priority patent/DE9213704U1/de
Application filed by Individual filed Critical Individual
Publication of EP0635071A1 publication Critical patent/EP0635071A1/en
Application granted granted Critical
Publication of EP0635071B1 publication Critical patent/EP0635071B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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)
  • Manufacture And Refinement Of Metals (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

The invention relates to a process and device for relably preventing the contamination of the tapping steel from a converter by flush slag. To this end a plastic, deformable plug (1, 8) of fireproof material containing silicate and oxide components and a suitable binder is used. The plug (1, 8) is inserted with the aid of a fitting device into the tapping until its front surface closed off by a cone-shaped crush-plate (2, 5) is virtually flush with the inside of the converter, on being crushed completely fills the diameter of the tapping aperture (10) and thus provides a plane such that the flush slag is reliably guided over the tapping when the converter is tipped. Owing to the process used, the novel plastic plug (1, 8) fits a wide range of tapping aperture diameters. The plug (1, 8) is rapidly removed by the molten steel flowing off through the cone channel (5) so that the steel flows into the tapping pan.

Description

Verfahren und Vorrichtung zur Vermeidung von Kontamination des Abstichstahles durch Vorlaufschlacke bei einem kippbaren KonverterMethod and device for avoiding contamination of the tapping steel by forward slag in a tiltable converter
B e s c h r e i b u n gDescription
Die Erfindung betrifft eine Vorrichtung zum Ver¬ schließen des Abstichloches eines kippbaren Konverters mit einem Verschlußstopfen, der aus hitzefester Masse, einem zum Konverterinneren weisenden, beim Auftreffen von flüssigem Stahl schmelzenden Stirnblech sowie einem Setz¬ gerät besteht, über das der Stopfen in das Abstichloch einführbar und darin gegen dessen Wandung verformbar ist. Die Erfindung betrifft außerdem ein Verfahren zum Betreiben eines Konverters und dabei zum gleichmäßigen und schlacke¬ freien Ableiten des flüssigen Stahls, wobei ein aus plastischem Material bestehender Stopfen möglichst tief in das Innenwand und Außenwand verbindende Abstichloch einge¬ führt und dort festgesetzt wird.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.
Kippbare Konverter besitzen an geeigneter Stelle in der Konverterwand oberhalb des Badspiegels eine Aus¬ lauföffnung bzw. ein Abstichloch zur Überführung des flüssigen Stahls in die Abstichpfanne. Zum Entleeren wird der Konverter in eine solche Position gekippt, daß der Stahl durch das Abstichloch in die nachgeschaltete Pfanne strömt. Da auf der Metallschmelze stets spezifisch leichtere Schlacke unterschiedlicher Viskosität auf¬ schwimmt, gelangt diese während des Kippvorganges zwangs¬ weise zuerst in das Abstichloch und somit mehr oder weniger große Mengen an Vorlaufschlacke in die Abstichpfanne. Für zahlreiche nachfolgende metallurgische Prozesse ist das Vorhandensein von sauerstoffreicher und häufig mit Phosphor oder Schwefel angereicherter Schlacke von erheblichem Nachteil. Es ergibt sich daher die Forderung möglichst schlackenfrei den Konverterstahl in die Abstichpfanne zu überführen. Dies wird bekannterweise dadurch erreicht, daß das Abstichloch des Konverters vorübergehend verschlossenAt 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
Ersatzblatt wird. Hierzu sind eine Reihe von Systemen bekannt, die erst dann das Abstichloch freigeben sollen, wenn die Schlacke während des Kippvorganges am Abstich vorbeigeführt worden ist. Insbesondere sind Schiebersysteme als Verschlu߬ mechanik bekannt, die jedoch nicht verhindern können, daß Vorlaufsschlacke in den Abstichkanal gerät, weil sie mit der Außenwand des Konverters abschließen. Außerdem werden bisher Stopfen aus verschiedenen Materialien bzw. Materialkombinationen außen im Abstichloch angeordnet oder in den Abstich hineingetrieben (AT-PS-355 070, AT-PS-257 665). Bekannt sind darüber hinaus für die äußere Plazierung Kombinationen aus Faserstoffen mit Feststoffen, plastische Tonmaterialien, Holzstopfen und auch Pechstopfen und für die innere Plastifizierung z.B. Kombinationen aus Blechen mit feuerfester Materialbeschichtung sowie ggf. zusätzlicher Tonmaterialbeschichtung sowie Krallen zum Festsetzen im Abstichloch (EP-A-0 315 311, US-A-4 877 221, WO 90/06377, US-A-4 399 986 und EP-A-0 260 735). Aufgrund der technologisch erforderlichen konischen bzw. trichter¬ artigen Formgebung der Abstichlöcher und des fort¬ schreitenden Verschleißes der feuerfesten Materialien in diesem Bereich, treten mit den bekannten Stopfen un¬ kontrollierbare und demnach nachteilige Verhaltensweisen durch vorzeitigen Ausfall der Schutzfunktion gegen Vorlauf¬ schlackenverunreinigungen auf. Im Ergebnis werden daher häufig größere Mengen Vorlaufschlacke trotz entsprechender Sicherungen in die Pfanne überführt. Letztlich ist je nach Setzvorrichtung eine nicht unerhebliche Gefährdung der Bedienungsmanschaft mit dem Einsatz dieser Verschlu߬ stopfen verbunden.Spare sheet becomes. For this purpose, a number of systems are known which should only release the tap hole when the slag has been led past the tap during the tipping process. In particular, 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. In addition, 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). 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. Ultimately, depending on the setting device, a considerable risk to the operating team is associated with the use of these sealing plugs.
Der Erfindung liegt daher die Aufgabe zugrunde, eine die nutzungsbedingten Veränderungen des Abstichloches aus¬ gleichende, einfach zu handhabende Verschlußvorrichtung und ein Verfahren anzugeben, das die Überführung von größeren Mengen Konvertervorlaufschlacke in die Pfanne zu¬ verlässig verhindert. Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Verschlußstopfen einen zylinderförmigen, hoch¬ plastischen Kern aufweist, daß die Zylinderabdeckflächen von dem Stirnbleph und einer Grundplatte abgedeckt sind, daß das Stirnblech gegen die Grundplatte verschiebbar mit dem Setzgerät verbunden und in einen Trichterkanal übergehend ausgebildet ist, der den Verschlußstopfen bzw. Kern durchörtert und eine auf das Stirnblech einwirkende Ziehkralle aufnehmend geformt ist.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.
Bei einer derart ausgebildeten Vorrichtung ist die Möglichkeit gegeben, den aufgrund seiner zylinderförrnigen Form ohne Probleme in das Abstichloch einschiebbar und Verschlußstopfen soweit einzuschieben, daß er mit seinem Stirnblech mit der Konverterinnenseite annähernd fluchtend positioniert und dann durch Ziehen der Ziehkralle gesetzt wird. Dabei kann die Ziehkralle und damit das Setzgerät . ohne Probleme von außerhalb her betrieben werden, weil das Stirnblech in einen Trichterkanal übergeht, der den Ver¬ schlußstopfen durchörtert, so daß das Festsetzen des Stopfens auch wirklich konverterinnenseitig erfolgt und nicht an dessen Außenwand. Ist der Verschlußstopfen ent¬ sprechend gesetzt, so versintert das Stirnblech und weder Schlacke noch sonstige Teile können durch das Abstichloch ausfließen. Vielmehr kann der Konverter gekippt werden, wobei mit Berühren des flüssigen Stahls nun das Stirnblech und auch der Trichterkanal schmilzt und der Stahl durch den Trichterkanal genau gezielt in die Pfanne fließen kann. Da der übrige Teil des Verschlußstopfens mit Ausnahme der Ränder nicht versintert ist, wird er schnell und ohne Pro¬ bleme ausgetragen bzw. ausgespült, wobei die geringe Menge an Stopfenmaterial für die weitere Verarbeitung, des Stahls keinerlei Behinderung darstellt. Die unterschiedlichen Betriebsweisen und Betriebsbedingungen eines Konverters haben selbst nach mehrstündigem Verweilen des Verschlu߬ stopfens im Abstichrohr keinerlei negativen Einfluß auf die volle Funktions- und Schutzwirkung desselben. Aufgrund seiner Anordnung im Übergangsbereich zum Konverterinneren wird das, häufig bei neuzugestellten Konvertern, Eindringen von Schlacke in das Abstichloch während des Blasvorganges ebenfalls wirksam verhindert. Die im feuerfesten Material des Verschlußstopfens enthaltenen permanenten und tempo¬ rären Bindemittel verhindern außerdem einen vorzeitigen Zerfall der Restmasse. Die zur Konverterinnenseite hin ge¬ bildete Kappe ist stabil genug, um beim Kippen des Kon¬ verters die Schlacke sicher über den Abstich zu leiten. Sie bricht erst beim Anstehen des ferrostatischen Druckes ein.With a device designed in this way, there is the possibility of inserting the plug into the tap hole and inserting the sealing plug to such an extent that its end plate is positioned approximately flush with the inside of the converter and then set by pulling the pulling claw. The claw and thus the setting tool can. can be operated from the outside without any problems, because the end plate merges into a funnel channel which penetrates the sealing plug, so that the plug is actually fixed on the inside of the converter and not on its outer wall. If the sealing plug is set accordingly, the end plate sinters and neither slag nor other parts can flow out through the tap hole. Rather, 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. by virtue of Due to its arrangement in the transition area to the inside of the converter, the penetration of slag into the tap hole during the blowing process, often in the case of new converters, is also effectively prevented. 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.
Eine vorteilhaft gleichmäßige Masse für den Ver¬ schlußstopfen ist die, bei der der zylinderförmige Kern aus feuerfestem Material mit unter 3 mm Körnung, Binde¬ mittel und Verflüssiger und Plastifizierer besteht.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.
Der zylinderförmige Kern kann aus Rohstoffen auf der Basis von Silicium-, Aluminium-, Magnesiumoxid bzw. -Silikat in geeigneter Zusammensetzung bestehen. Bevorzugt ist allerdings als Feuerfestmaterial ein Gemisch ausThe 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
20 bis 40 Gew.-% Tonerdesilikat 20 bis 40 Gew.-% Bindeton20 to 40 wt .-% alumina silicate 20 to 40 wt .-% binder clay
sowiesuch as
0 bis 30 Gew.-% Wasser0 to 30 wt% water
5 bis 20 Gew.-% Öl5 to 20% by weight oil
0,5 bis 3 Gew.-% Plastifizierer0.5 to 3% by weight plasticizer
0,1 bis 2 Gew.-% Verflüssiger0.1 to 2% by weight of condenser
0,1 bis 2 Gew.-% temporäre Binder0.1 to 2 wt .-% temporary binder
0,1- bis 5 Gew.-% permanente Binder.0.1 to 5% by weight of permanent binder.
Dieses feuerbeständige Material hat eine Raumdichte von 0,8 bis 0,9 kg/dm3 und ist damit wesentlich leichter als herkömmliche, für diesen Zweck eingesetzte Materialien. Vorteilhaft ist es, wenn als permanente Binder Silikate, als temporäre Binder Zellulosematerial, als Plastifizier polyelektrolytische Alkohle und als Ver¬ flüssiger Fettsäure eingesetzt sind. Damit ist ein Material geschaffen, das einmal sicher stellt, daß beim Verformen sich der Stopfen im Abstichloch wirksam festsetzt, ohne daß es zu einer durchgehenden Versinterung kommt. Die Rest¬ masse wird auch bei entsprechender Hitzeeinwirkung vor einem Zerfall geschützt.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.
Das verwendete Stirnblech besteht aus hitzebe¬ ständigem Material und ist trichterförmig und in Richtung auf die kleinere Öffnung konvex ausgebildet, wobei die kleinere Öffnung in den Trichterkanal mündet. Dieser Trichterkanal ist durch den Stopfen hindurch verlängert und dient zur Führung des Setzwerkzeuges für das Quetschen des Verschlußstopfens sowie zur Zentrierung des austreten¬ den Gießstrahles im Moment des Abstiches zur Vermeidung eines Brauseeffektes beim fließenden Stahl. Der Trichter¬ kanal kann unterschiedliche Durchmesser aufweisen. Bei der erfindungsgemäßen Ausführung betragen die Durchmesser 25-38 mm. Der Querschnitt des Trichterkanals kann von der Kreisform abweichen.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.
Der Trichterkanal ist erfindungsgemäß über die Grund¬ platte hinaus in das Setzgerät übergehend ausgebildet, um so das Einschieben der Kralle zu erleichtern.According to the invention, 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.
Weiter sieht die Erfindung vor, daß das Setzgerät eine die Dicke des Reststopfens vorgebende, einstellbare Sperre aufweist, um auf diese Art und Weise das genaue Setzen des Verschlußstopfens in der Übergangszone zum Kon¬ verterinnenraum abzusichern.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.
Zum Betreiben eines Konverters auf hochstehendem * sicherheitstechnischen Standart dient ein Verfahren, bei dem der Stopfen bis dicht an die Innenwand des Konverters heran in das Abstichloch eingeführt und dann von der Unter- seite und gleichzeitig durch eine Mittenbohrung hindurch auch von der Oberseite her bis zum dichten Anliegen an die Lochwandung verformt wird. Durch das Verformen des Stopfens von beiden Seiten her ist sichergestellt, daß er an der vorgesehenen Stelle wirklich positioniert wird. Außerdem ist auf diese Art und Weise sichergestellt, daß er sich gleichmäßig an die ja nicht immer gleichförmige Innenwand des Abstichloches anlegt und somit daß Abstich¬ loch auch wirksam verschließt und zwar mit Ausnahme der verbleibenden Mittenbohrung. Durch diese Mittenbohrung hin¬ durch kann .dann der flüssige Stahl austreten, wie weiter vorne erläutert worden ist.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. By deforming the plug from both sides, it is ensured that it is really positioned at the intended location. It is also ensured in this way that it lies evenly against the inner wall of the tap hole, which is not always uniform, and thus that the tap hole also closes effectively, with the exception of the remaining center hole. The liquid steel can then escape through this central bore, as was explained further above.
Eine besonders wirksame Methode ist die, bei der der Stopfen mit Hilfe einer ihn von der Unterseite und der Oberseite erfassenden Sitzvorrichtung in der Übergangszone zum Konverterinnenraum positioniert und unter Offenhaltung der Mittenbohrung durch Verquetschen plaziert wird. Mit Hilfe dieses Verfahrens und mit Hilfe der Setzvorrichtung kann der Stopfen von beiden Seiten her gleichmäßig beauf¬ schlagt werden, so daß das schon weiter oben erwähnte gleichmäßige Anliegen an der Innenwand des Abstichrohres sichergestellt ist.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. With the aid of this method and with the aid of the setting device, 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.
Eine besonders zweckmäßige Ausführung des Verfahrens sieht vor, daß das plastische Material des Stopfens aus 20 bis 40 Gew.-% isolierenden Tonerdesilikat, 20 bis 40 Gew.-% Bindeton, 0 bis 30 Gew.-% Wasser, 5 bis 20 Gew.-% Mineralöl, 0,1 bis 3 Gew.-% Plastifizierer (polyelektro- lytische Alkohle), 0,1 bis 2 Gew.-% Verflüssiger (Fett¬ säure), 0,1 bis 2 Gew.-% temporärer Binder (Zellulose) und 0,1 bis 5 Gew.-% permanente Binder (Silikate) zusammen¬ gemischt, zu einem zylinderförmigen Körper geformt und dann mit dem Trichterkanal eines trichterförmigen Quetsch¬ bleches durchstoßen und dann auf die Setzvorrichtung aufge¬ setzt und in das Abstichloch eingesetzt und festgesetzt wird. Mit einem derart geformten und eingesetzten Ver¬ schlußstopfen ist es vorteilhafterweise möglich, die weiter vorn geschilderten erheblichen Vorteile zu erreichen, so daß bei üblichen Konvertern und zwar auch bei schon länger in Betrieb befindlichen Konvertern ein immer sicheres und weitgehend schlackenfreies Entnehmen des flüssigen Stahls aus dem Konverter gesichert ist.A particularly expedient embodiment of the method provides that 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. With a sealing plug shaped and inserted in this way, it is advantageously possible to extend the Achieving significant advantages described above, so that with conventional converters, even with converters that have been in operation for a long time, an always safe and largely slag-free removal of the liquid steel from the converter is ensured.
Im folgenden wird eine bevorzugte Ausführung der Er¬ findung erläutert. Dabei zeigen in schematisierter Darstel¬ lungA preferred embodiment of the invention is explained below. Show in a schematic representation
Fig. 1 perspektivische Seitenansicht einerFig. 1 perspective side view of a
Ausführungsform eines Verschlußstopfens,Embodiment of a sealing plug,
Fig. 2 Schnitt durch einen Konverter im Bereich des Abstichloches mit eingeschobenem Verschlußstopfen (eine Setzvorrichtung sitzend) undFig. 2 section through a converter in the tap hole with inserted plug (a seated device) and
Fig. 3 Schnitt durch einen Konverter im Bereich des Abstichloches mit eingesetztem und verquetschtem Verschlußstopfen.Fig. 3 section through a converter in the tap hole with inserted and squeezed sealing plug.
Der in den Figuren allgemein mit (1) bezeichnete Schlackenvorlaufstopfen besitzt eine zylindrische Form. Der Querschnitt dieses Verschlußstopfens (8) kann von der Kreis¬ form abweichen. Der Verschlußstopfen (8) besteht aus einem feuerbeständigem Material und besitzt konverterinnenseitig ein trichtförmiges Quetschblech (2), welches einen ver¬ längerten, durch den Verschlußstopfen (8) geführten Trichterkanal (5) besitzt. Das feuerfeste Material des Verschlußstopfens besteht bei der dargestellten Ausführung aus 35 Gew.-% Tonerdesilikat, 35 Gew.-% Bindeton, 20 Gew.-% Wasser, 6,5 Gew.-% Mineralöl, 0,2 Gew.-% Plastifizierer, 0,3 Gew.-% Verflüssiger, 0,5 Gew.-% temporären Binder und 2,5 Gew.-% permanenten Binder. Als permanente Binder sind Silikate, als temporäre Zellulosematerialien, als Plasti- fizierer und Verflüssiger sind polyelektrolytische Alkohole und Fettsäuren verwendet worden. Das Raumgewicht des Ver¬ schlußstopfens beträgt 0,8 bis 0,9 kg/dm3. In der Fig. 2 ist dargestellt, wie der Verschlu߬ stopfen (8) mit Hilfe des Setzgerätes in das Abstichloch (10) eingeführt ist. Die Grundplatte (4) des auf den Durch¬ messer des Abstichloches (10) abgestimmten Setzgerätes liegt auf der, dem Quetschblech bzw. Stirnblech (2) gegen¬ überliegenden Seite (7).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). In the embodiment shown, 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. Silicates have been used as permanent binders, as temporary cellulose materials, as plasticizers and plasticizers, polyelectrolytic alcohols and fatty acids have been used. The density of the sealing plug is 0.8 to 0.9 kg / dm 3 . 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).
Eine Ziehkralle (6) ist nach Fig. 2 durch den Trichterkanal (5) bis oberhalb des Trichters geführt und hat zunächst die Aufgabe, den Verschlußstopfen (8) bis zu seiner endgültigen Positionierung im Abstichloch (10) zu halten. Der Verschlußstopfen (8) wird mit Hilfe des Setz¬ gerätes soweit in ds Abstichloch (10) eingeführt, daß er mit seiner Quetschblechfläche, d.h. also der Oberfläche des Stirnbleches (2) nahezu mit der Konverterinnenseite (9) fluchtet. -Über das Hebelsystem des Setzgerätes wird die Ziehkralle (6) auf das Stirnblech (2) gezogen, wodurch ein Druck auf das Stopfenmaterial ausgeübt wird, das sich so¬ weit verformt, bis der Durchmesser des Abstichloches (10) vollständig ausgefüllt ist.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.
In Fig. 3 ist ein verquetschter Verschlußstopfen (8) im Abstichloch (10) dargestellt. Die Dicke des Stopfen¬ boden bzw. Reststopfens (12) in Fig. 3 wird für jeden Ab¬ stichdurchmesser eines Konverters mit Hilfe des Setz¬ gerätes stets eingehalten, so daß ein reproduzierbares Öffnungsverhalten sichergestellt ist.In Fig. 3 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.
Nicht zur Ausfüllung des Abstichdurchmessers er¬ forderliche Stopfenmaterial wird mit Hilfe des Quetsch¬ bleches bzw. Stirnbleches (2) an der Abstichwandung gem. Fig. 3 verpreßt.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.
Aufgrund der hohen Strahlungswärem auf der Konverter¬ innenseite schmilzt das Stirnblech (2) und versintert mit dem feuerfesten Material zu einer festen Kappe (siehe Fig. 3). Diese Kappe hält dem Blasdruck und den auftretenden Vibrationen und Erschütterungen stand. Das übrige feuer¬ feste, isolierende Material verfestigt sich soweit, daß es im Abstichloch (8) stabil erhalten bleibt. Eine Versinterung mit der Wandung des Abstichloches (8) findet nicht statt. Die versinterte Kappe ist so stabil, daß sie beim Kippen des Konverters die Vorlaufschlacke sicher über das Abstich¬ loch (8) leitet und erst unter dem ferrostatischen Druck einbricht. Restliches Stopfenmaterial wird innerhalb weniger Sekunden durch den ausfließenden Stahl ausgetragen.Due to the high radiant heat on the inside of the converter, 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.
Aufgrund der geringen Materialmengen gelangen nur wenig Fremdteile in die Abstichpfanne, die hier nicht dar¬ gestellt ist. Bei der erfindungsgemäßen Ausführung und An¬ wendung ist eine hohe Sicherheit in der Funktion des Ver¬ schlußstopfens (8) selbst unter den Bedingungen langer Heißstandzeiten von über zwei Stunden gewährleistet. Bei Schlackenstandsmessungen in Abstichpfannen von 100 bis 250 to Fassungsvermögen konnten bei 200 Versuchszustellungen nennenswerte Mengen Vorlaufschlacken nicht mehr nachge¬ wiesen werden. Due to the small amount of material, only a few foreign parts get into the tapping pan, which is not shown here. In the embodiment and application according to the invention, a high level of safety in the function of the sealing plug (8) is ensured even under the conditions of long hot service lives of over two hours. In the case of slag level measurements in tapping pans with a capacity of 100 to 250 tons, it was no longer possible to detect any significant amounts of preliminary slags in 200 test deliveries.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Vorrichtung zum Verschließen des Abstichloches eines kippbaren Konverters m t einem Verschlußstopfen, der aus hitzefester Masse, e nem zum Konverterinneren weisenden, beim Auftreffen von flüssigem Stahl schmelzenden Stirnblech sowie einem Setzgerät besteht, über das der Stopfen in das Abstichloch einführbar und darin gegen dessen Wandung ver¬ formbar ist, d a d u r c h g e k e n n z e i c h n e t , daß der Verschlußstopfen (8) einen zyl i nderf örmi gen, hoch¬ plastischen Kern (1)' aufweist, daß die Zylinderabdeckfl chen von dem Stirnblech (2) und einer Grundplatte (4) abgedeckt sind, daß das Stirnblech (2) gegen die Grundplatte (4) ver¬ schiebbar mi dem Setzgerät verbunden und in einen Trichter¬ kanal (5) übergehend ausgebildet ist, der den Verschlu߬ stopfen bzw. Kern (1) durchörtert und eine auf das Stirnblech einwirkende Ziehkralle (6) aufnehmend geformt ist.1. Device for closing the tap hole of a tiltable converter with a sealing plug, which consists of heat-resistant mass, e nem facing the converter, when melting liquid steel end plate and a setting tool, through which the plug can be inserted into the tap hole and against the wall thereof is deformable, characterized in that the sealing plug (8) has a cylindrical, highly plastic core (1) ' that the cylinder cover surfaces are covered by the end plate (2) and a base plate (4) that the end plate (2) can be moved against the base plate (4) and connected to the setting tool and is formed into a funnel channel (5) which penetrates the plug or core (1) and a pulling claw acting on the end plate (6) has a receiving shape.
2. Vorrichtung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß der zylinderförmige Kern (1) aus feuerfestem Material mit unter 3 mm Körnung, Bindemittel und Verflüssiger und Pl astifizierer besteht.2. Device according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the cylindrical core (1) consists of refractory material with less than 3 mm grain, binder and plasticizer and plasticizer.
3. Vorrichtung nach Anspruch 2, d a d u r c h g e k e n n z e i c h n e t , daß der zylinderförmige Kern (1) als Feuerfestmaterial ein Gemisch aus 463. Device according to claim 2, characterized in that the cylindrical core (1) as a refractory material from a mixture 46
1111
20 bi s 40 Gew. -% Tonerdesi 1 ikat 20 bi s 40 Gew. ~% Bi ndeton20 to 40 wt.% Alumina silicate 20 to 40 wt
0 bi s 30 Gew. -% Wasser0 to 30% by weight of water
5 bis 20 Gew.- Öl5 to 20% by weight oil
0,5 bis 3 Gew.-% Pl asti f izi erer0.5 to 3% by weight plasticizer
0,1 bis 2 Gew.-% Verflüssiger0.1 to 2% by weight of condenser
0,1 bis 2 Gew.-% temporäre Binder0.1 to 2 wt .-% temporary binder
0,1 bis 5 Gew.-% permanente Binder0.1 to 5% by weight of permanent binder
aufwei st.having.
4. Vorrichtung nach Anspruch 3, d a d u r c h g e k e n n z e i c h n e t , daß die permanenten Binder Silikate, die temporären Binder Zellulose-Material, die Pl asti f izi erer polyelektrolytische Alkohole und die Verflüssiger Fettsäuren sind.4. Apparatus according to claim 3, that the permanent binders are silicates, the temporary binders are cellulose material, the plasticizers are polyelectrolytic alcohols and the plasticizers are fatty acids.
5. Vorrichtung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß das Stirnblech (2) trichterförmig und in Richtung auf die kleinere Öffnung konvex und die kleinere Öffnung in den Trichterkanal (5) einmündend ausgebildet ist.5. The device of claim 1, d a d u r c h g e k e n n z e i c h n e t that the end plate (2) is funnel-shaped and convex towards the smaller opening and the smaller opening in the funnel channel (5) opening.
6. Vorrichtung nach Anspruch 1 und Anspruch 5, d a d u r c h g e k e n n z e i c h n e t , daß der Tr chterkanal (5) über die Grundplatte (4) hinaus und in das Setzgerät übergehend ausgebildet ist.6. Apparatus according to claim 1 and claim 5, so that the trench channel (5) is formed beyond the base plate (4) and into the setting tool.
7. Vorrichtung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß das Setzgerät eine die Dicke des Reststopfens (12) vor gebende, einstellbare Sperre aufweist. 7. The device according to claim 1, characterized in that the setting tool has a thickness of the remaining plug (12) before giving, adjustable lock.
8. Vorrichtung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß der Trichterkanal (5) bei rd. 20 cm Abstichlochdurch¬ messer einen Durchmesser von 25 bis 38 mm aufweist.8. The device according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the funnel channel (5) at approx. 20 cm tap hole diameter has a diameter of 25 to 38 mm.
9. Verfahren zum Betreiben eines Konverters und dabei zum gleichmäßigen und schlackefreien Ableiten des flüssigen Stahls, wobei ein aus plastischem Material be¬ stehender Stopfen möglichst tief in das Innenwand und Außenwand verbindende Abstichloch eingeführt und dort festgesetzt wird, d a d u r c h g e k e n n z e i c h n e t , daß der Stopfen bis dicht an die Innenwand des Konverters heran in das Abstichloch eingeführt und dann von der Unter¬ seite und gleichzeitig durch eine Mittenbohrung hindurch auch von der Oberseite her bis zum dichten Anliegen an die Lochwandung verformt wird.9. A method of operating a converter and thereby for the even 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 the outer wall and being fixed there, characterized in that the plug is close to one another the inner wall of the converter is inserted into the tap hole and is then deformed from the underside and at the same time through a central bore from the upper side until it lies tight against the hole wall.
10. Verfahren nach Anspruch 9, d a d u r c h g e k e n n z e i c h n e t , daß der Stopfen mit Hilfe einer ihn von der Unterseite und der Oberseite erfassenden Setzvorrichtung in der Übergangszone zum Konverterinnenraum positioniert und unter Offenhaltung der Mittenbohrung durch Verquetschen plaziert wird.10. The method according to claim 9, so that the stopper is positioned in the transition zone to the converter interior with the aid of a setting device which detects it from the underside and the top side, and is placed by squeezing it while keeping the center hole open.
11. Verfahren nach Anspruch 9 und Anspruch 10, d a d u r c h g e k e n n z e i c h n e t , daß das plastische Material des Stopfens aus11. The method according to claim 9 and claim 10, d a d u r c h g e k e n n z e i c h n e t that the plastic material of the plug
20 bis 40 Gew.-% isolierenden Tonerdesilikat,20 to 40% by weight of insulating clay silicate,
20 bis 40 Gew.-X Bindeton,20 to 40% by weight of binding clay,
0 bis 30 Gew.-% Wasser, _0 to 30% by weight water, _
5 bis 20 Gew.-% Mineralöl,5 to 20% by weight mineral oil,
0,1 bis 3 Gew.-% Plastifizierer (polyelektro¬ lytische Alkohle) ,0.1 to 3% by weight plasticizer (polyelectrolytic alcohol),
0,1 bis 2 Gew.-% Verflüssiger (Fettsäure),0.1 to 2% by weight of plasticizer (fatty acid),
0,1 bis 2 Gew.-% temporärer Binder (Zellulose) und0.1 to 2% by weight of temporary binder (cellulose) and
0,1 bis 5 Gew.- permanente Binder (Silikate)0.1 to 5% by weight of permanent binders (silicates)
zusammengemischt, zu einem zylinderförmigen Körper geformt und dann mit dem Trichterkanal eines trichterförmigen Quetschbleches durchstoßen und dann auf die Setzvor¬ richtung aufgesetzt und in das Abstichloch eingesetzt und festgesetzt wird. 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.
EP93907776A 1992-04-07 1993-04-01 Process and device for preventing contamination of the tapping steel by flush slag in a tipping converter Expired - Lifetime EP0635071B1 (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
DE19924211593 DE4211593C2 (en) 1992-04-07 1992-04-07 Device for closing the tapping hole of a tiltable converter
DE4211593 1992-04-07
DE9213704U 1992-10-10
DE9213704U DE9213704U1 (en) 1992-10-10 1992-10-10
DE9215646U DE9215646U1 (en) 1992-04-07 1992-11-17 Device for avoiding contamination of the tapping steel by preliminary slag in a tiltable converter
DE9215646U 1992-11-17
PCT/DE1993/000311 WO1993020246A1 (en) 1992-04-07 1993-04-01 Process and device for preventing contamination of the tapping steel by flush slag in a tipping converter

Publications (2)

Publication Number Publication Date
EP0635071A1 true EP0635071A1 (en) 1995-01-25
EP0635071B1 EP0635071B1 (en) 1996-02-28

Family

ID=27203617

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93907776A Expired - Lifetime EP0635071B1 (en) 1992-04-07 1993-04-01 Process and device for preventing contamination of the tapping steel by flush slag in a tipping converter

Country Status (10)

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008039142A1 (en) 2008-08-21 2010-02-25 Stilkerieg, Berthold, Dipl.-Ing. Sealing plug for tilting converters
DE102013002623A1 (en) 2013-02-18 2014-08-21 Veronica Stilkerieg Stopper, useful for temporarily closing a tap hole of a converter, where the stopper is inserted from outer side of converter into tap hole and fixed in a region of inner side after the overflow of a liquid ash from liquid steel
DE102020102105A1 (en) 2020-01-29 2021-07-29 Veronica Stilkerieg Sealing plugs for converter tap holes

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19848004B4 (en) * 1998-10-17 2006-10-12 Stilkerieg, Berthold, Dipl.-Ing. Apparatus for preventing contamination of the tapping steel by feed slag in a tiltable converter with improved material composition
DE102005015469A1 (en) * 2005-04-04 2006-10-05 Stilkerieg, Berthold, Dipl.-Ing. Cylindrical plug, for the temporary closure of a converter tap hole, is composed of a mixture of clay components and hydrocarbon compounds and a thermo set resin
JP4989422B2 (en) * 2007-10-30 2012-08-01 ニコー物産株式会社 Slag outflow prevention plug
CN107324822A (en) * 2017-07-15 2017-11-07 山西建龙实业有限公司 A kind of slag and slag basin release agent

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT257665B (en) 1964-08-03 1967-10-25 Voest Ag Device for closing the tap in inflatable crucibles or other metallurgical furnaces
LU71494A1 (en) * 1974-12-16 1976-11-11
DE2549728C2 (en) 1975-11-06 1977-10-06 Stahlwerke Peine-Salzgitter Ag, 3150 Peine Device for closing the tapping hole of a converter
US4399986A (en) 1981-12-14 1983-08-23 Collins William J Device for plugging a taphole in a furnace
NL8602255A (en) 1986-09-08 1988-04-05 Hoogovens Groep Bv STOP FOR A CONVERTER TAP HOLE.
US4828226A (en) 1987-10-16 1989-05-09 Foseco International Limited Tap hole plugs for metallurgical vessels
DE8805975U1 (en) 1988-05-05 1988-06-23 Wertz, Heinz, 4000 Duesseldorf, De
AU625800B2 (en) 1988-12-01 1992-07-16 Goricon Metallurgical Services Limited Improvements relating to steel-making vessels
US4877221A (en) 1988-12-05 1989-10-31 Tri-Star Manufacturing & Service, Inc. Expandable tap hole plug

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9320246A1 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008039142A1 (en) 2008-08-21 2010-02-25 Stilkerieg, Berthold, Dipl.-Ing. Sealing plug for tilting converters
DE102013002623A1 (en) 2013-02-18 2014-08-21 Veronica Stilkerieg Stopper, useful for temporarily closing a tap hole of a converter, where the stopper is inserted from outer side of converter into tap hole and fixed in a region of inner side after the overflow of a liquid ash from liquid steel
DE102020102105A1 (en) 2020-01-29 2021-07-29 Veronica Stilkerieg Sealing plugs for converter tap holes
EP3859257A1 (en) 2020-01-29 2021-08-04 Veronica Stilkerieg Stopper for converter tap holes

Also Published As

Publication number Publication date
PL172861B1 (en) 1997-12-31
BR9306202A (en) 1998-06-23
EP0635071B1 (en) 1996-02-28
WO1993020246A1 (en) 1993-10-14
AU3887193A (en) 1993-11-08
JP3252909B2 (en) 2002-02-04
ES2085154T3 (en) 1996-05-16
ATE134708T1 (en) 1996-03-15
JPH07508070A (en) 1995-09-07
DE59301739D1 (en) 1996-04-04
HUT67839A (en) 1995-05-29
AU671447B2 (en) 1996-08-29
HU217016B (en) 1999-11-29

Similar Documents

Publication Publication Date Title
DE3334914A1 (en) EXPANDABLE, EDIBLE STOPPER PLUG FOR STEEL EXTRACTION AND TREATMENT VESSELS
DE2842505B1 (en) Process for discharging a borosilicate glass melt in batches from a ceramic glass melting furnace with a heated floor outlet and a device for carrying out the process
EP1097246B1 (en) Method and device for sealing a tap hole in metallurgical containers
EP0635071B1 (en) Process and device for preventing contamination of the tapping steel by flush slag in a tipping converter
EP0375897A1 (en) Tapping channel for metallurgical vessels
DE2549728B1 (en) DEVICE FOR CLOSING THE TAPPING HOLE OF A CONVERTER
DE3230646C1 (en) Process and apparatus for closing the taphole of a stationary, non-tiltable electric metal-melting furnace
WO1997018050A1 (en) Process and device for closing a tap hole
DE3840161C2 (en) Device for opening an operational sequence of a slide valve device and method for opening such a device
DE19848004B4 (en) Apparatus for preventing contamination of the tapping steel by feed slag in a tiltable converter with improved material composition
EP0204076B1 (en) Arrangement of a sleeve for the injection of gases or solids into a ladle containing a metallurgical melt
DE4039477A1 (en) FREE-LOCKING SECURITY FOR METALLURGICAL VESSELS WITH BOTTOM LOCK
DE1758681A1 (en) Device and method for casting metals
EP2315859B1 (en) Seal plug for a tiltable converter
DE4211593C2 (en) Device for closing the tapping hole of a tiltable converter
EP0974801A1 (en) Method and apparatus for slag-free tapping
US5972281A (en) Process and device to avoid contamination of tapping steel by flush slag with a tiltable converter
DE2607379A1 (en) DEVICE FOR FLUSHING STEEL
EP2704871B1 (en) Reaction crucible for aluminothermic welding operations, having a refractory shutoff element
DE2219407C3 (en) Tap hole tamping compound for blast furnaces and other metallurgical furnaces
WO2020038662A1 (en) Removing a metal sample from a sample probe
DD258952A5 (en) METHOD AND DEVICE FOR IMPRESSING SUBSTANCES IN HIGH-TEMPERATURE FLUIDS
DE3641035C1 (en) Casting ladle for holding molten steel
EP3859257B1 (en) Stopper for converter tap holes
DE2162100C3 (en) Shaped body of inoculant for inoculating cast iron melts

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19941001

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE

17Q First examination report despatched

Effective date: 19940110

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19960228

Ref country code: DK

Effective date: 19960228

REF Corresponds to:

Ref document number: 134708

Country of ref document: AT

Date of ref document: 19960315

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: PATENTANWAELTE GEORG ROEMPLER UND ALDO ROEMPLER

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: 67422

REF Corresponds to:

Ref document number: 59301739

Country of ref document: DE

Date of ref document: 19960404

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19960430

ITF It: translation for a ep patent filed

Owner name: ING. C. GREGORJ S.P.A.

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2085154

Country of ref document: ES

Kind code of ref document: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Effective date: 19960528

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19960425

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Effective date: 19960531

ET Fr: translation filed
REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

Ref document number: 67422

Country of ref document: IE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
BECA Be: change of holder's address

Free format text: 19981208 *STILKERIEG BERTHOLD:56651 NIEDERZISSEN

REG Reference to a national code

Ref country code: CH

Ref legal event code: PUEA

Free format text: STILKERIEG, BERTHOLD;BREIER, FRIEDHELM TRANSFER- BERTHOLD STILKERIEG

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

REG Reference to a national code

Ref country code: ES

Ref legal event code: PC2A

Owner name: BERTHOLD STILKERIEG

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19990707

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000430

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000430

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20110518

Year of fee payment: 19

Ref country code: FR

Payment date: 20110426

Year of fee payment: 19

Ref country code: SE

Payment date: 20110412

Year of fee payment: 19

Ref country code: GB

Payment date: 20110330

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20110420

Year of fee payment: 19

Ref country code: AT

Payment date: 20110328

Year of fee payment: 19

Ref country code: BE

Payment date: 20110411

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20110414

Year of fee payment: 19

BERE Be: lapsed

Owner name: *STILKERIEG BERTHOLD

Effective date: 20120430

REG Reference to a national code

Ref country code: NL

Ref legal event code: V1

Effective date: 20121101

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 134708

Country of ref document: AT

Kind code of ref document: T

Effective date: 20120401

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20120401

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20121228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120430

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120401

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120401

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20121030

Year of fee payment: 20

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120430

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120402

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120401

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121101

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 59301739

Country of ref document: DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 59301739

Country of ref document: DE

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20130715

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20130403

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120402

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 59301739

Country of ref document: DE

Representative=s name: PATENTANWAELTE SCHULTE & SCHULTE, DE

Effective date: 20140109

Ref country code: DE

Ref legal event code: R081

Ref document number: 59301739

Country of ref document: DE

Owner name: STILKERIEG, VERONICA, DIPL.-ING., DE

Free format text: FORMER OWNER: STILKERIEG, BERTHOLD, DIPL.-ING., 56651 NIEDERZISSEN, DE

Effective date: 20140109