EP2352607B1 - Method for exchangeably fastening a refractory purge plug or sleeve and a container for molten metal - Google Patents

Method for exchangeably fastening a refractory purge plug or sleeve and a container for molten metal Download PDF

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Publication number
EP2352607B1
EP2352607B1 EP09760487.0A EP09760487A EP2352607B1 EP 2352607 B1 EP2352607 B1 EP 2352607B1 EP 09760487 A EP09760487 A EP 09760487A EP 2352607 B1 EP2352607 B1 EP 2352607B1
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EP
European Patent Office
Prior art keywords
sleeve
refractory
gap
opening
purge plug
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.)
Not-in-force
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EP09760487.0A
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German (de)
French (fr)
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EP2352607A2 (en
Inventor
Michael Klikovich
Leopold Kneis
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Stopinc AG
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Stopinc AG
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Priority to PL09760487T priority Critical patent/PL2352607T3/en
Publication of EP2352607A2 publication Critical patent/EP2352607A2/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B22D1/002—Treatment with gases
    • B22D1/005—Injection assemblies therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/02—Linings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/08—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like for bottom pouring
    • 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
    • C21C5/48—Bottoms or tuyéres of converters
    • 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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/072—Treatment with gases
    • 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
    • C21C2250/00—Specific additives; Means for adding material different from burners or lances
    • C21C2250/08—Porous plug
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ

Definitions

  • the invention relates to a method for installing and removing a refractory sink or a refractory sleeve in a built-in container refractory hole stone according to the preamble of claim 1, and a container for molten metal for performing the method.
  • conical refractory purging pits via which gas is introduced into the molten metal, or conical refractory pods, each of which forms a pouring opening
  • conical refractory purging pits are conventionally used today in correspondingly formed perforated brick openings. They are separated from them by narrow mortar joints (about 1 to 3 mm wide).
  • narrow mortar joints about 1 to 3 mm wide.
  • a refractory filling of an annular gap according to the document EP-A-0 471 245 is disposed between a refractory lining and a gas purging plug. It is designed as a prefabricated deformable mounting layer adapted to the shape of an annular gap. This is to ensure that the annular gap is filled evenly in the installed state of the molding with this installation layer.
  • JP-A-01 195 240 there is disclosed a method of repairing by replacing the refractory lining and inserting a cylindrical refractory sleeve in which the refractory lining of a round flow tube is drilled out and this refractory sleeve is inserted to have a thickness approximately equal to the size eliminated. Mortar is then placed between the refractory lining and the cylindrical refractory sleeve.
  • This method is limited to the removal of a worn linings, but it is not used to replace a sleeve.
  • the present invention has for its object to provide a cost-effective method for installing and removing a refractory sink or a refractory sleeve or a container for molten metal in and out of a built-in container fireproof hole brick, with which the change of the sink or the sleeve considerably simplified and the risk of a change-induced hole stone damage is largely eliminated.
  • the change can also be automated.
  • the problems associated with so-called mortar joints pre-wear in the joint area, penetration of steel into the joints or even breakthrough risk) are also eliminated.
  • Any Vorverschleiss the perforated stone can be automatically remedied when changing the sinker or the sleeve (the gap between the hole stone opening and the sink or the sleeve filling refractory mass is also distributed to the worn areas of the perforated stone).
  • Fig. 1 and 2 is a part of a container 1 for molten metal, such as a so-called ladle for molten steel, shown, from the container only an outer steel shell 2 and a refractory lining 3 can be seen.
  • a refractory hole block 5 is inserted, which has a cylindrical hole stone opening 6.
  • a refractory purge 10 used according to the invention consists of two in one piece (prefabricated), coaxial parts 11, 12 consists.
  • the inner part 11 with a gas connection 13, which corresponds to a conventional sink, as used to introduce gas into the molten metal, has a conical outer surface 11a, the outer portion 12 a corresponding conical inner surface 12a.
  • the outer part 12, which actually assumes the function of a conventional perforated brick, has a cylindrical outer surface 12b. Between this outer surface 12b and the cylindrical hole stone opening 6 according to the invention an annular gap 15 is present, which is filled with a refractory material.
  • the gap width is preferably 10 to 50 mm.
  • a new purging plug 10 is introduced through a bottom opening 4a of the container 1 into the hole stone opening 6 by means of a suitable device (eg hoist, push rod, robot, etc.) and is positioned and fixed therein.
  • a suitable device eg hoist, push rod, robot, etc.
  • the mechanical introduction allows an exact centering.
  • the positioning of the new sink 10 in the hole stone opening 6 can be supported, for example, by laser measurement and / or optical methods.
  • a bottom plate 17 is placed on the container 1 and the gap 15 is filled with the refractory mass, which preferably takes place by means of a pump, by casting, spraying or impressions.
  • the supply 18 of the refractory mass is indicated. If the hole stone 5 already have worn areas, so no hole stone repair is necessary, since the pumping mass evenly distributed in the annular gap 15 and also on the worn areas of the perforated stone 5.
  • Fig. 3 shows a built in a perforated brick 5 'purging 10', which has a cylindrical outer surface 10a. Between this outer surface 10a and a cylindrical hole stone opening 6 'of the perforated brick 5', in turn, a fillable with a refractory mass gap 15 'is present. The installation and removal of the sink 10 'is carried out in the same manner as described above. In Fig. 3 in turn, a drilling tool 16 'is indicated, with which the refractory mass for the removal of the purge stone 10' from the annular gap 15 'can be drilled out.
  • the cylindrical configuration of the outer surface of the sink on the one hand and the hole stone opening on the other hand, from which results in an annular gap is advantageous, but not essential.
  • the gap could quite conically taper or widen vertically, or be square in horizontal cross-section, which is then to bring out the refractory mass instead of drilling tools 16, 16 'after Fig. 1 and 3 Milling tools such as end mill would use.
  • refractory sleeves that form a spout opening, in corresponding Openings of the container for molten metal or are installed in the hole stones used there.
  • Figure 4 shows a built-in an opening 24 of the container 1 for molten metal hole brick 25 with a hole stone opening 26.
  • a refractory sleeve 30 is inserted, which has a spout opening 31.
  • an annular gap 35 is present, which is filled with a refractory material.
  • the perforated brick opening 26 has an upper, conically widening part 26b which encloses a space 32 which is widened in diameter relative to the sleeve 30 and its spout opening 31.
  • this space 32 ' is provided in the sleeve 30' and the conically widening part 31a 'associated with the spout opening 31'.
  • an annular gap 35' is present, which is filled with a refractory material.
  • Fig. 1 and 2 could also be the sleeve of two in one piece made (prefabricated), coaxial parts, of which the inner would have a conical outer shape and the outer would have a corresponding conical inner shape. The outer part would then take over the function of a conventional hole stone.
  • the built-in container hole stone 5; 5 ';25; 25 ' forms a framing stone, which ensures the stability of the system.
  • the installation and removal of the sleeves 30 and 30 'after Fig. 4 and 5 takes place analogously to the already described installation and removal of the purge stones 10 and 10 'after Fig. 1 to 3 , From an annular gap, the refractory mass is brought out with advantage with a drilling tool 36 to bring out a worn sleeve (see. Fig. 4 ). If the gap has a shape other than an annular shape (eg angled in the horizontal cross section), the mass is milled out.
  • the filling of the gap present around the new sleeve positioned in the perforated brick opening is in turn preferably carried out by means of a pump, by casting, spraying or indenting (cf., Supply 38 in FIG Fig. 5 ).
  • any pre-wearing of the perforated stone can be automatically remedied when changing the sink or the sleeve (the gap between the hole stone opening and the sink or the sleeve filling refractory mass is also distributed to the worn areas of the hole stone).
  • the removal of the refractory mass can be done instead of using a drill or a milling cutter or the like by burning out by means of one or more lances.
  • the refractory mass is chosen in the case that can be burned out relatively easily and even automated.

Description

Die Erfindung betrifft ein Verfahren zum Ein- und Ausbau eines feuerfesten Spülsteines oder einer feuerfesten Hülse in einen in den Behälter eingebauten feuerfesten Lochstein gemäss dem Oberbegriff des Anspruches 1, sowie ein Behälter für Metallschmelze zur Durchführung des Verfahrens.The invention relates to a method for installing and removing a refractory sink or a refractory sleeve in a built-in container refractory hole stone according to the preamble of claim 1, and a container for molten metal for performing the method.

Üblicherweise werden heutzutage konische feuerfeste Spülsteine (Spülhülsen), über welche Gas in die Metallschmelze eingeleitet wird, oder konische feuerfeste Hülsen, die jeweils eine Ausgussöffnung bilden, in entsprechend ausgebildete Lochsteinöffnungen eingesetzt. Sie sind von diesen durch schmale Mörtelfugen (etwa 1 bis 3 mm breit) getrennt. Beim Ausbruch der verschlissenen Spülsteine oder Hülsen, welcher durch Ziehen, Ausstemmen mittels Presslufthammer, Ausbrennen, Ausdrücken etc. erfolgt, kommt es immer wieder zur Zerstörung dieser Teile, wobei die Reste in der jeweiligen Lochsteinöffnung hängen bleiben. Diese Reste sowie auch Mörtelreste und allfällige Stahlzungen müssen arbeitsaufwändig beseitigt werden. Beim Ausbruch sowie bei den Reinigungsarbeiten kann es zur Beschädigung oder Zerstörung des Lochsteines kommen.Conventionally, conical refractory purging pits (purging sleeves), via which gas is introduced into the molten metal, or conical refractory pods, each of which forms a pouring opening, are conventionally used today in correspondingly formed perforated brick openings. They are separated from them by narrow mortar joints (about 1 to 3 mm wide). At the outbreak of worn purging stones or sleeves, which is done by pulling, prying out by pneumatic hammer, burning out, expressions, etc., it always comes back to the destruction of these parts, the remains stuck in the hole hole hole. These residues as well as mortar residues and any steel tongues must be laboriously eliminated. During the outbreak as well as during the cleaning work it can come to damage or destruction of the perforated stone.

In der Regel sind aufwändige Lochsteinreparaturen nach jedem Spülstein- bzw. Hülsenwechsel notwendig. Die Reinigungsarbeiten an den heissen feuerfesten Teilen sind gefährlich und bedeuten eine Schwerarbeit. Beim Aufbringen des Mörtels auf den Spülstein bzw. auf die Hülse kann ungleichmässige Mörtelstärke entstehen, oder es kann beim manuell erfolgendem Einbau des Spülsteines bzw. der Hülse der Mörtel örtlich ungleichmässig oder sogar lokal vollständig abgestreift werden. Dies führt zu bekannten Problemen wie Vorverschleiss im Fugenbereich, Eindringen von Stahl in die Fuge und sogar Durchbruchgefahr.As a rule, elaborate perforated stone repairs are necessary after every flushing or sleeve change. The cleaning work in the hot Fireproof parts are dangerous and mean heavy work. When applying the mortar on the sink or on the sleeve uneven mortar strength can arise, or it can be locally locally uneven or even locally completely stripped when installing manually the Spülsteines or the sleeve of the mortar. This leads to known problems such as pre-wear in the joint area, penetration of steel into the joint and even breakthrough risk.

Eine feuerfeste Füllung eines Ringspaltes gemäss der Druckschrift EP-A-0 471 245 ist zwischen einer feuerfesten Auskleidung und einem Gasspülstein angeordnet. Sie ist als eine vorgefertigte verformbare Einbauschicht der Form eines Ringspaltes angepasst ausgebildet. Damit soll sichergestellt werden, dass der Ringspalt im Einbauzustand des Formteils gleichmässig mit dieser Einbauschicht ausgefüllt ist.A refractory filling of an annular gap according to the document EP-A-0 471 245 is disposed between a refractory lining and a gas purging plug. It is designed as a prefabricated deformable mounting layer adapted to the shape of an annular gap. This is to ensure that the annular gap is filled evenly in the installed state of the molding with this installation layer.

Bei einer Ausziehvorrichtung nach der Druckschrift DE 10 2005 018 021 wird ein durch eine Mörtelschicht in einem Lochstein befestigter Gasspülstein durch eine Rüttlereinrichtung gelockert und gelöst. Die Praxis zeigt, dass es schwierig ist, auf diesem Wege die Steine zuverlässig zu entfernen.In an extractor according to the publication DE 10 2005 018 021 For example, a gas purging plug fastened by a layer of mortar in a perforated brick is loosened and released by a vibrating device. Practice shows that it is difficult to reliably remove stones in this way.

In der Druckschrift JP-A-01 195 240 ist ein Verfahren zum Reparieren durch Auswechseln der Feuerfestauskleidung und Einsetzen einer zylindrischen Feuerfesthülse geoffenbart, bei welcher die Feuerfestauskleidung eines runden Durchflussrohres ausgebohrt und diese Feuerfesthülse eingesetzt wird, wobei sie eine Dicke aufweisen soll, die annähernd der eliminierten Grösse entspricht. Sodann wird Mörtel zwischen die Feuerfestauskleidung und die zylindrische Feuerfesthülse eingebracht. Dieses Verfahren beschränkt sich auf das Entfernen eines abgenützten Linings, aber es dient nicht zum Auswechseln einer Hülse.In the publication JP-A-01 195 240 there is disclosed a method of repairing by replacing the refractory lining and inserting a cylindrical refractory sleeve in which the refractory lining of a round flow tube is drilled out and this refractory sleeve is inserted to have a thickness approximately equal to the size eliminated. Mortar is then placed between the refractory lining and the cylindrical refractory sleeve. This method is limited to the removal of a worn linings, but it is not used to replace a sleeve.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein kostengünstiges Verfahren zum Ein- und Ausbau eines feuerfesten Spülsteines oder einer feuerfesten Hülse bzw. einen Behälter für Metallschmelze zu schaffen in einen und aus einem in den Behälter eingebauten feuerfesten Lochstein vorzuschlagen, mit denen der Wechsel des Spülsteines bzw. der Hülse erheblich vereinfacht und die Gefahr einer wechselbedingten Lochsteinbeschädigung weitgehend eliminiert wird.The present invention has for its object to provide a cost-effective method for installing and removing a refractory sink or a refractory sleeve or a container for molten metal in and out of a built-in container fireproof hole brick, with which the change of the sink or the sleeve considerably simplified and the risk of a change-induced hole stone damage is largely eliminated.

Diese Aufgabe wird erfindungsgemäss durch ein Verfahren mit den Merkmalen des Anspruches 1 sowie durch einen Behälter nach Anspruch 6 gelöst.This object is achieved according to the invention by a method having the features of claim 1 and by a container according to claim 6.

Bevorzugte Weitergestaltungen des erfindungsgemässen Behälters sowie des erfindungsgemässen Verfahrens bilden den Gegenstand der abhängigen Ansprüche.Preferred refinements of the container according to the invention and of the method according to the invention form the subject of the dependent claims.

Dadurch, dass zum Ausbau eines verschlissenen Spülsteines bzw. einer verschlissenen Hülse kein manuell durchgeführter Ausbruch mehr notwendig ist, der eine gefährliche Schwerarbeit bedeutet, sondern diese Teile mit Hilfe von geeigneten Werkzeugen (Bohr- oder Fräswerkzeugen) leicht losgelöst werden können, entfallen nicht nur die aufwändigen Reinigungsarbeiten, sondern auch die Gefahr, dass der Lochstein beschädigt wird. Der Entfall der aufwendigen Reinigungs- und Reparaturarbeiten bedeutet eine enorme Zeitersparnis und zudem wird die Arbeitssicherheit erhöht.The fact that the removal of a worn purging plug or a worn sleeve no manually performed outbreak is more necessary, which means a dangerous heavy work, but these parts with the help of suitable tools (drilling or milling tools) can be easily detached, not only accounts for elaborate cleaning work, but also the danger that the perforated brick will be damaged. The elimination of the costly cleaning and repair work means an enormous time savings and also the work safety is increased.

Der Wechsel kann zudem automatisiert werden. Die mit sogenannten Mörtelfugen zusammenhängenden Probleme (Vorverschleiss im Fugenbereich, Eindringen von Stahl in die Fugen oder sogar Durchbruchgefahr) fallen ebenfalls weg. Allfälliger Vorverschleiss des Lochsteines kann beim Wechsel des Spülsteines bzw. der Hülse automatisch saniert werden (die einen Spalt zwischen der Lochsteinöffnung und dem Spülstein bzw, der Hülse verfüllende feuerfeste Masse wird auch auf die verschlissenen Bereiche des Lochsteines verteilt).The change can also be automated. The problems associated with so-called mortar joints (pre-wear in the joint area, penetration of steel into the joints or even breakthrough risk) are also eliminated. Any Vorverschleiss the perforated stone can be automatically remedied when changing the sinker or the sleeve (the gap between the hole stone opening and the sink or the sleeve filling refractory mass is also distributed to the worn areas of the perforated stone).

Die Erfindung wird nachfolgend anhand der Zeichnung näher erläutert. Es zeigen:

Fig. 1
einen Teil eines Behälters für Metallschmelze mit einem in einer Öffnung eingesetzten feuerfesten Lochstein und einem im Lochstein eingebauten, zu ersetzenden feuerfesten Spülstein;
Fig. 2
den Behälterteil nach Fig. 1 mit einem neuen feuerfesten Spülstein;
Fig. 3
eine der Fig. 1 entsprechende Darstellung mit einer anderen Variante eines feuerfesten Spülsteines;
Fig. 4
einen Teil eines Behälters für Metallschmelze mit einem in einer Öffnung eingesetzten Lochstein und einer im Lochstein eingebauten, eine Ausgussöffnung bildenden feuerfesten Hülse, die zu ersetzen ist; und
Fig. 5
eine weitere Ausführungsform des Lochsteines und der darin eingebauten, eine Ausgussöffnung bildenden, neuen feuerfesten Hülse.
The invention will be explained in more detail with reference to the drawing. Show it:
Fig. 1
a part of a molten metal container having a refractory perforated brick inserted in an opening and a refractory sink installed in the perforated brick to be replaced;
Fig. 2
the container part after Fig. 1 with a new refractory sink;
Fig. 3
one of the Fig. 1 corresponding representation with another variant of a refractory sink;
Fig. 4
a part of a container for molten metal with a perforated stone inserted in an opening and a built-in hole stone, a pouring opening forming refractory sleeve to be replaced; and
Fig. 5
a further embodiment of the perforated stone and the built-in, forming a spout opening, new refractory sleeve.

In Fig. 1 und 2 ist ein Teil eines Behälters 1 für Metallschmelze, beispielsweise einer sogenannten Pfanne für Stahlschmelze, dargestellt, wobei vom Behälter lediglich ein äusserer Stahlmantel 2 sowie eine feuerfeste Auskleidung 3 ersichtlich sind. In einer Öffnung 4 des Behälters 1 ist ein feuerfester Lochstein 5 eingesetzt, der eine zylindrische Lochsteinöffnung 6 aufweist.In Fig. 1 and 2 is a part of a container 1 for molten metal, such as a so-called ladle for molten steel, shown, from the container only an outer steel shell 2 and a refractory lining 3 can be seen. In an opening 4 of the container 1, a refractory hole block 5 is inserted, which has a cylindrical hole stone opening 6.

In die Lochsteinöffnung 6 ist gemäss Fig. 1 und 2 ein feuerfester Spülstein 10 eingesetzt, der erfindungsgemäss aus zwei in einem Stück gefertigten (vorkonfektionierten), koaxialen Teilen 11, 12 besteht. Der innere Teil 11 mit einem Gasanschluss 13, der einem konventionellen Spülstein entspricht, wie sie zum Einleiten von Gas in die Metallschmelze verwendet werden, weist eine konische Aussenfläche 11a auf, der äussere Teil 12 eine entsprechende konische Innenfläche 12a. Der äussere Teil 12, der hier eigentlich die Funktion eines konventionellen Lochsteines übernimmt, weist eine zylindrische Aussenfläche 12b auf. Zwischen dieser Aussenfläche 12b und der zylindrischen Lochsteinöffnung 6 ist erfindungsgemäss ein ringförmiger Spalt 15 vorhanden, der mit einer feuerfesten Masse verfüllt ist. Die Spaltbreite beträgt vorzugsweise 10 bis 50 mm.In the hole stone opening 6 is according to Fig. 1 and 2 a refractory purge 10 used according to the invention consists of two in one piece (prefabricated), coaxial parts 11, 12 consists. The inner part 11 with a gas connection 13, which corresponds to a conventional sink, as used to introduce gas into the molten metal, has a conical outer surface 11a, the outer portion 12 a corresponding conical inner surface 12a. The outer part 12, which actually assumes the function of a conventional perforated brick, has a cylindrical outer surface 12b. Between this outer surface 12b and the cylindrical hole stone opening 6 according to the invention an annular gap 15 is present, which is filled with a refractory material. The gap width is preferably 10 to 50 mm.

Der Ausbau eines verschlissenen Spülsteines erfolgt nicht mehr durch Ausbruch bzw. Ausstemmen, Ausbrennen, Ausdrücken, Ziehen etc., sondern es wird erfindungsgemäss aus dem Spalt 15 die feuerfeste Masse herausgebohrt und dabei der Spülstein 10 losgelöst. Bei einem ringförmigen Spalt 15 können dazu handelsübliche Bohrer 16, z.B. Kronenbohrer, verwendet werden, wie in Fig. 1 angedeutet. Durch den Bohrvorgang erhält man eine saubere Oberfläche am Lochstein 5 sowie eine exakte geometrische Form. Die aufwendigen Reinigungs- und Reparaturarbeiten entfallen.The removal of a worn purging plug is no longer carried out by outbreak or Ausstemmen, burning out, expressions, pulling, etc., but it is inventively drilled out of the gap 15, the refractory mass while the purging 10 detached. For an annular gap 15, commercially available drills 16, eg, crown drills, can be used, as in FIG Fig. 1 indicated. The drilling process gives a clean surface on the perforated brick 5 as well as an exact geometric shape. The costly cleaning and repair work accounts.

Nachdem der verschlissene Spülstein ausgebohrt wurde, wird ein neuer Spülstein 10 mittels einer geeigneten Vorrichtung (z.B. Hebezeug, Schubstange, Roboter etc.) durch eine Bodenöffnung 4a des Behälters 1 in die Lochsteinöffnung 6 eingeführt und in dieser positioniert und fixiert. Das maschinelle Einbringen erlaubt dabei eine exakte Zentrierung. Die Positionierung des neuen Spülsteines 10 in der Lochsteinöffnung 6 kann beispielsweise durch Laservermessung und/oder optische Methoden unterstützt werden.After the worn purging plug has been drilled out, a new purging plug 10 is introduced through a bottom opening 4a of the container 1 into the hole stone opening 6 by means of a suitable device (eg hoist, push rod, robot, etc.) and is positioned and fixed therein. The mechanical introduction allows an exact centering. The positioning of the new sink 10 in the hole stone opening 6 can be supported, for example, by laser measurement and / or optical methods.

Wie in Fig. 2 angedeutet, wird dann eine Bodenplatte 17 an den Behälter 1 gesetzt und der Spalt 15 mit der feuerfesten Masse verfüllt, was vorzugsweise mittels einer Pumpe, durch Vergiessen, Spritzen oder Eindrücken erfolgt. In Fig. 2 ist die Zufuhr 18 der feuerfesten Masse angedeutet. Sollte der Lochstein 5 bereits verschlissene Bereiche aufweisen, so ist keine Lochsteinreparatur notwendig, da sich die Pumpmasse gleichmässig im ringförmigen Spalt 15 und auch auf die verschlissenen Bereiche des Lochsteines 5 verteilt.As in Fig. 2 indicated, then a bottom plate 17 is placed on the container 1 and the gap 15 is filled with the refractory mass, which preferably takes place by means of a pump, by casting, spraying or impressions. In Fig. 2 the supply 18 of the refractory mass is indicated. If the hole stone 5 already have worn areas, so no hole stone repair is necessary, since the pumping mass evenly distributed in the annular gap 15 and also on the worn areas of the perforated stone 5.

Fig. 3 zeigt einen in einem Lochstein 5' eingebauten Spülstein 10', der eine zylindrische Aussenfläche 10a aufweist. Zwischen dieser Aussenfläche 10a und einer zylindrischen Lochsteinöffnung 6' des Lochsteines 5' ist wiederum ein mit einer feuerfesten Masse ausfüllbarer Spalt 15' vorhanden. Der Ein- und Ausbau des Spülsteines 10' erfolgt in gleicher Weise wie vorstehend beschrieben. In Fig. 3 ist wiederum ein Bohrwerkzeug 16' angedeutet, mit dem die feuerfeste Masse für den Ausbau des Spülsteines 10' aus dem ringförmigen Spalt 15' herausgebohrt werden kann. Fig. 3 shows a built in a perforated brick 5 'purging 10', which has a cylindrical outer surface 10a. Between this outer surface 10a and a cylindrical hole stone opening 6 'of the perforated brick 5', in turn, a fillable with a refractory mass gap 15 'is present. The installation and removal of the sink 10 'is carried out in the same manner as described above. In Fig. 3 in turn, a drilling tool 16 'is indicated, with which the refractory mass for the removal of the purge stone 10' from the annular gap 15 'can be drilled out.

Die zylindrische Ausgestaltung der Aussenfläche des Spülsteines einerseits und der Lochsteinöffnung anderseits, aus der sich ein Ringspalt ergibt, ist von Vorteil, jedoch nicht zwingend notwendig. Der Spalt könnte sich durchaus vertikal konisch verjüngen oder erweitern, oder im horizontalen Querschnitt eckig sein, wobei man dann zum Herausbringen der feuerfesten Masse anstelle von Bohrwerkzeugen 16, 16' nach Fig. 1 und 3 Fräswerkzeuge wie z.B. Fingerfräser verwenden würde.The cylindrical configuration of the outer surface of the sink on the one hand and the hole stone opening on the other hand, from which results in an annular gap is advantageous, but not essential. The gap could quite conically taper or widen vertically, or be square in horizontal cross-section, which is then to bring out the refractory mass instead of drilling tools 16, 16 'after Fig. 1 and 3 Milling tools such as end mill would use.

In der gleichen Art und Weise, wie die Spülsteine, können erfindungsgemäss auch feuerfeste Hülsen, die eine Ausgussöffnung bilden, in entsprechende Öffnungen der Behälter für Metallschmelze bzw. in die dort eingesetzten Lochsteine eingebaut werden. Es handelt sich um Hülsen, an welche jeweils die oberste Verschlussplatte eines Schiebeverschlusses anschliesst, mit dem die Ausgussöffnung geschlossen oder geöffnet gehalten werden kann.In the same way as the sinks, according to the invention also refractory sleeves that form a spout opening, in corresponding Openings of the container for molten metal or are installed in the hole stones used there. These are sleeves, to each of which the uppermost closure plate of a sliding closure connects, with the spout opening can be kept closed or opened.

Fig.4 zeigt einen in eine Öffnung 24 des Behälters 1 für Metallschmelze eingebauten Lochstein 25 mit einer Lochsteinöffnung 26. In die Lochsteinöffnung 26 ist eine feuerfeste Hülse 30 eingesetzt, die eine Ausgussöffnung 31 aufweist. Zwischen der Lochsteinöffnung 26 bzw. einem zylindrischen Teil 26a derselben und einer zylindrischen Aussenfläche 30a der Hülse 30 ist ein ringförmiger Spalt 35 vorhanden, der mit einer feuerfesten Masse verfüllt ist. Die Lochsteinöffnung 26 weist einen oberen, sich konisch erweiternden Teil 26b auf, der einen im Durchmesser gegenüber der Hülse 30 und ihrer Ausgussöffnung 31 erweiterten Raum 32 umschliesst. Figure 4 shows a built-in an opening 24 of the container 1 for molten metal hole brick 25 with a hole stone opening 26. In the hole stone opening 26, a refractory sleeve 30 is inserted, which has a spout opening 31. Between the perforated brick opening 26 or a cylindrical part 26 a thereof and a cylindrical outer surface 30 a of the sleeve 30, an annular gap 35 is present, which is filled with a refractory material. The perforated brick opening 26 has an upper, conically widening part 26b which encloses a space 32 which is widened in diameter relative to the sleeve 30 and its spout opening 31.

Bei einer in Fig. 5 dargestellten Variante ist dieser Raum 32' in der Hülse 30' vorgesehen und der sich konisch erweiternde Teil 31a' der Ausgussöffnung 31' zugeordnet. Zwischen der zylindrischen Aussenfläche 30a' der Hülse 30' und der zylindrischen Lochsteinöffnung 26' ist wiederum ein ringförmiger Spalt 35' vorhanden, der mit einer feuerfesten Masse verfüllt ist.At an in Fig. 5 variant shown, this space 32 'is provided in the sleeve 30' and the conically widening part 31a 'associated with the spout opening 31'. Between the cylindrical outer surface 30a 'of the sleeve 30' and the cylindrical hole stone opening 26 ', in turn, an annular gap 35' is present, which is filled with a refractory material.

Ähnlich wie der Spülstein 10 nach Fig. 1 und 2 könnte auch die Hülse aus zwei in einem Stück gefertigten (vorkonfektionierten), koaxialen Teilen bestehen, von denen der innere eine konische Aussenform und der äussere eine entsprechende konische Innenform aufweisen würde. Der äussere Teil würde dann die Funktion eines konventionellen Lochsteines übernehmen. Der im Behälter eingebaute Lochstein 5; 5'; 25; 25' bildet einen Umrahmungsstein, der die Stabilität des Systems gewährleistet.Similar to the sink 10 after Fig. 1 and 2 could also be the sleeve of two in one piece made (prefabricated), coaxial parts, of which the inner would have a conical outer shape and the outer would have a corresponding conical inner shape. The outer part would then take over the function of a conventional hole stone. The built-in container hole stone 5; 5 ';25; 25 'forms a framing stone, which ensures the stability of the system.

Der Ein- und Ausbau der Hülsen 30 bzw. 30' nach Fig. 4 und 5 erfolgt analog zum bereits beschriebenen Ein- und Ausbau der Spülsteine 10 bzw. 10' nach Fig. 1 bis 3. Aus einem Ringspalt wird die feuerfeste Masse mit Vorteil mit einem Bohrwerkzeug 36 herausgebracht, um eine verschlissene Hülse herauszuholen (vgl. Fig. 4). Weist der Spalt eine andere als ringförmige Form auf (z.B. im horizontalen Querschnitt eckig), so wird die Masse herausgefräst. Das Füllen des um die neue, in der Lochsteinöffnung positionierte Hülse vorhandenen Spaltes wird wiederum vorzugsweise mittels einer Pumpe, durch Vergiessen, Spritzen oder Eindrücken durchgeführt (vgl. Zufuhr 38 in Fig. 5).The installation and removal of the sleeves 30 and 30 'after Fig. 4 and 5 takes place analogously to the already described installation and removal of the purge stones 10 and 10 'after Fig. 1 to 3 , From an annular gap, the refractory mass is brought out with advantage with a drilling tool 36 to bring out a worn sleeve (see. Fig. 4 ). If the gap has a shape other than an annular shape (eg angled in the horizontal cross section), the mass is milled out. The filling of the gap present around the new sleeve positioned in the perforated brick opening is in turn preferably carried out by means of a pump, by casting, spraying or indenting (cf., Supply 38 in FIG Fig. 5 ).

Dadurch, dass zum Ausbau eines verschlissenen Spülsteines bzw. einer verschlissenen Hülse kein manuell durchgeführter Ausbruch mehr notwendig ist, der eine gefährliche Schwerarbeit bedeutet, sondern diese Teile mit Hilfe von geeigneten Werkzeugen (Bohr- oder Fräswerkzeugen) leicht losgelöst werden können, entfallen nicht nur die aufwendigen Reinigungsarbeiten, sondern auch die Gefahr, dass der Lochstein beschädigt wird. Der Entfall der aufwendigen Reinigungs- und Reparaturarbeiten bedeutet eine enorme Zeitersparnis. Die Arbeitssicherheit wird erhöht. Der Wechsel kann zudem automatisiert werden. Die mit sogenannten Mörtelfugen zusammenhängenden Probleme (Vorverschleiss im Fugenbereich, Eindringen von Stahl in die Fugen oder sogar Durchbruchgefahr) fallen ebenfalls weg. Allfälliger Vorverschleiss des Lochsteines kann beim Wechsel des Spülsteines bzw. der Hülse automatisch saniert werden (die den Spalt zwischen der Lochsteinöffnung und dem Spülstein bzw. der Hülse verfüllende feuerfeste Masse wird auch auf die verschlissenen Bereiche des Lochsteines verteilt).The fact that the removal of a worn purging plug or a worn sleeve no manually performed outbreak is more necessary, which means a dangerous heavy work, but these parts with the help of suitable tools (drilling or milling tools) can be easily detached, not only accounts for consuming cleaning work, but also the risk that the perforated brick is damaged. The elimination of the costly cleaning and repair work means an enormous time savings. Occupational safety is increased. The change can also be automated. The problems associated with so-called mortar joints (pre-wear in the joint area, penetration of steel into the joints or even breakthrough risk) are also eliminated. Any pre-wearing of the perforated stone can be automatically remedied when changing the sink or the sleeve (the gap between the hole stone opening and the sink or the sleeve filling refractory mass is also distributed to the worn areas of the hole stone).

Das Entfernen der feuerfesten Masse kann anstelle der Benutzung eines Bohrers bzw. eines Fräsers oder dergleichen auch durch Ausbrennen mittels einer oder mehreren Lanzen erfolgen. Die feuerfeste Masse ist in dem Falle so gewählt, dass relativ leicht und sogar automatisiert ausgebrannt werden kann.The removal of the refractory mass can be done instead of using a drill or a milling cutter or the like by burning out by means of one or more lances. The refractory mass is chosen in the case that can be burned out relatively easily and even automated.

Claims (10)

  1. A method for mounting and removing a refractory purge plug (10; 10') or a refractory sleeve (30; 30') forming an outlet opening (31, 31') in or from a nozzle brick (5; 5'; 25; 25'), which is inserted into an opening (4; 24) of a container (1) for molten metal and has a nozzle brick opening (6; 6'; 26; 26'), a new purge plug (10; 10') respectively a new sleeve (30; 30') is introduced into the nozzle brick opening (6; 6'; 26; 26') and positioned and fixed in the latter, after which a gap (15; 15'; 35; 35') between the nozzle brick opening (6; 6'; 26; 26') and the purge plug (10; 10') respectively the sleeve (30; 30') is filled with a refractory mass, characterised in that
    in order to remove a worn purge plug (10; 10') respectively a worn sleeve (30; 30') the refractory mass being removed from the gap (15; 15'; 35; 35') and it being possible to replace the purge plug respectively the sleeve, where the refractory mass being removed from the annular gap (15; 15'; 35; 35') using a drill (16; 16'; 36), preferably a cup saw, being drilled out or cut out and/or burned out by one or more lances.
  2. The method according to Claim 1, characterised in that the refractory mass is milled out, preferably with end mills, from a vertically conically tapering or extending gap or a gap with a rectangular horizontal cross-section between the worn nozzle brick and the purge plug respectively the sleeve.
  3. The method according to Claim 1 or 2, characterised in that the introduction of the new purge plug (10; 10') respectively the new sleeve (30; 30') into the nozzle brick opening (6; 6'; 26; 26') is implemented by means of an apparatus, such as for example a robot, a lifting tool or a push rod.
  4. The method according to any of the Claims 1 to 3, characterised in that the positioning of the new purge plug (10; 10') respectively the new sleeve (30; 30') in the nozzle brick opening (6; 6'; 26; 26') is supported by laser measurement and/or optical methods.
  5. The method according to any of the Claims 1 to 4, characterised in that the gap (15; 15'; 35; 35') between the nozzle brick (5; 5'; 25; 25') and the new purge plug (10; 10') respectively the new sleeve (30; 30') is filled with the refractory mass by means of a pump, by pouring, spraying or pushing in.
  6. A container for molten metal for implementing the method according to any of the Claims 1 to 5, comprising at least one opening (4; 24) in which a refractory nozzle brick (5; 5'; 25; 25') is mounted, and comprising a refractory purge plug (10; 10') inserted into a nozzle brick opening (6; 6'; 26; 26') or a refractory sleeve (30; 30') forming an outlet opening (31; 31'), characterised in that
    a gap (15; 15'; 35; 35') defined between the nozzle brick opening (6; 6'; 26; 26') and the purge plug (10; 10') respectively the sleeve (30; 30') filled with a refractory mass is formed, whereas the refractory mass of the annular gap (15; 15'; 35; 35') is removable for the purpose of changing the purge plug (10; 10') respectively the sleeve (30; 30') using a drill (16; 16'; 36), preferably a cup saw and/or by one or more lances, for this purpose the purge plug (10, 10') respectively the sleeve (30; 30') has a cylindrical outer surface (12b; 10a; 30a; 30a'), and the gap (15; 15'; 35; 35') is annular.
  7. The container according to Claim 6, characterised in that the gap (15; 15'; 35; 35') has a width of 10 to 100 mm.
  8. The container according to Claim 6 or 7, characterised in that the purge plug (10) respectively the sleeve consists of two coaxial parts (11, 12) produced as one piece, the inner of which has a conical outer shape, and the outer of which has a corresponding conical inner shape, the gap (15) filled with the refractory mass being formed between an outer surface (12b) of the outer part (12) and the nozzle brick opening (6).
  9. The container according to Claim 8, characterised in that the outer surface (12b) of an outer part (12) is cylindrical, and the gap (15) is annular.
  10. The container according to any of the Claims 6 to 9, characterised in that the nozzle brick opening (6; 6'; 26; 26') is cylindrical.
EP09760487.0A 2008-11-17 2009-11-17 Method for exchangeably fastening a refractory purge plug or sleeve and a container for molten metal Not-in-force EP2352607B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09760487T PL2352607T3 (en) 2008-11-17 2009-11-17 Method for exchangeably fastening a refractory purge plug or sleeve and a container for molten metal

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH01801/08A CH699948A2 (en) 2008-11-17 2008-11-17 Container for molten metal, and a method for an interchangeable connection of a refractory porous plug or a refractory sleeve.
PCT/EP2009/008180 WO2010054853A2 (en) 2008-11-17 2009-11-17 Method for exchangeably fastening a refractory purge plug or sleeve and a container for molten metal

Publications (2)

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EP2352607A2 EP2352607A2 (en) 2011-08-10
EP2352607B1 true EP2352607B1 (en) 2014-10-08

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EP09760487.0A Not-in-force EP2352607B1 (en) 2008-11-17 2009-11-17 Method for exchangeably fastening a refractory purge plug or sleeve and a container for molten metal

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EP (1) EP2352607B1 (en)
JP (1) JP5620394B2 (en)
KR (1) KR101580005B1 (en)
CN (2) CN105880545A (en)
CH (1) CH699948A2 (en)
ES (1) ES2525808T3 (en)
PL (1) PL2352607T3 (en)
WO (1) WO2010054853A2 (en)

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EP2783773B1 (en) 2013-03-28 2017-02-01 SMS group GmbH Device and method for extracting a gas purging plug from the wall of a metallurgical container
DE102013020732C9 (en) * 2013-12-10 2020-08-06 Refratechnik Holding Gmbh Using a heavy clay, refractory product
CN104028740B (en) * 2014-06-18 2017-01-18 莱芜钢铁集团有限公司 Upper pocket block for argon blowing of continuous casting tundish and mounting method and application of upper pocket block
AT14854U1 (en) * 2015-07-03 2016-07-15 Plansee Se Tank made of refractory metal
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CN113695563B (en) * 2021-10-27 2022-01-18 北京利尔高温材料股份有限公司 Hot patching die and hot patching method for ladle nozzle pocket brick

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JP2013510718A (en) 2013-03-28
EP2352607A2 (en) 2011-08-10
PL2352607T3 (en) 2015-03-31
CH699948A2 (en) 2010-05-31
ES2525808T3 (en) 2014-12-30
WO2010054853A3 (en) 2010-07-08
US8906290B2 (en) 2014-12-09
JP5620394B2 (en) 2014-11-05
WO2010054853A2 (en) 2010-05-20
CN105880545A (en) 2016-08-24
KR101580005B1 (en) 2015-12-24
KR20110084443A (en) 2011-07-22
CN102281966A (en) 2011-12-14
US20110241268A1 (en) 2011-10-06

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