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EP2352607A2 - 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

Info

Publication number
EP2352607A2
EP2352607A2 EP09760487A EP09760487A EP2352607A2 EP 2352607 A2 EP2352607 A2 EP 2352607A2 EP 09760487 A EP09760487 A EP 09760487A EP 09760487 A EP09760487 A EP 09760487A EP 2352607 A2 EP2352607 A2 EP 2352607A2
Authority
EP
European Patent Office
Prior art keywords
sleeve
refractory
opening
purging plug
gap
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
EP09760487A
Other languages
German (de)
French (fr)
Other versions
EP2352607B1 (en
Inventor
Michael Klikovich
Leopold Kneis
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.)
Stopinc AG
Original Assignee
Stopinc AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stopinc AG filed Critical Stopinc AG
Priority to PL09760487T priority Critical patent/PL2352607T3/en
Publication of EP2352607A2 publication Critical patent/EP2352607A2/en
Application granted granted Critical
Publication of EP2352607B1 publication Critical patent/EP2352607B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00Treatment of fused masses in the ladle or the supply runners before casting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00Treatment of fused masses in the ladle or the supply runners before casting
    • B22D1/002Treatment with gases
    • B22D1/005Injection assemblies therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/02Linings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/08Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like for bottom pouring
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28Manufacture of steel in the converter
    • C21C5/42Constructional features of converters
    • C21C5/46Details or accessories
    • C21C5/48Bottoms or tuyéres of converters
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04Removing impurities by adding a treating agent
    • C21C7/072Treatment with gases
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C2250/00Specific additives; Means for adding material different from burners or lances
    • C21C2250/08Porous plug
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/05Refining 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.
  • BEST ⁇ TIGUNGSKOPK cal refractory sleeves each forming a spout opening, inserted into appropriately trained hole stone 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.
  • 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.
  • This object is achieved according to the invention by a method having the features of claim 1 and by a container according to claim 7.
  • 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-wear of the perforated brick can be automatically remedied when changing the sink or the sleeve (the refractory mass filling a gap between the perforated brick opening and the sink or the sleeve is also distributed to the worn areas of the perforated brick).
  • FIG. 1 shows a part of a container for molten metal with a refractory perforated stone inserted in an opening and a built-in perforated brick refractory purge to be replaced;
  • Fig. 2 shows the container part of Figure 1 with a new refractory sink.
  • Fig. 3 is a representation corresponding to Figure 1 with another variant of a refractory purging plug.
  • FIG. 4 shows a part of a molten metal container with a perforated brick inserted in an opening and a refractory sleeve installed in the perforated brick and forming a pour opening, which is to be replaced;
  • Fig. 5 shows a further imple mentation of the perforated stone and the built-in, forming a spout opening, new refractory sleeve.
  • a part of a container 1 for molten metal for example, 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 sink 10 is used according to the invention consists of two in one piece (prefabricated), coaxial parts 1 1, 12 consists.
  • 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 material, 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 sink 10 'which is installed in a perforated block 5' and which has a cylindrical outer surface 10a. Between this outer surface 10a and a cylindrical perforated stone opening 6 'of the perforated brick 5' there is again a gap 15 'which can be filled with a refractory mass.
  • the installation and removal of the sink 10 ' is carried out in the same manner as described above.
  • a drilling tool 16 ' is indicated, with which the refractory material for the expansion 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 be quite conically tapered or widened in a vertical direction, or angular in horizontal cross section, and then for removing the refractory mass instead of drilling tools 16, 16 'according to FIGS. 1 and 3, milling tools such as e.g. End mill would use.
  • refractory sleeves which form a pouring opening can also be provided in accordance with the invention.
  • chende openings of the container for molten metal or in the hole bricks used there are installed. These are sleeves, to each of which the uppermost closure plate of a sliding closure connects, with which the spout opening can be closed or kept open.
  • FIG. 4 shows a perforated brick 25 with a perforated stone opening 26 installed in an opening 24 of the container 1 for molten metal.
  • a refractory sleeve 30 having a pouring opening 31 is inserted into the perforated brick opening 26.
  • an annular gap 35 is present, which is filled with a refractory material.
  • the perforated stone 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 'is associated with the spout opening 31'.
  • an annular gap 35' is present, which is filled with a refractory material.
  • the sleeve could also consist of two co-manufactured (prefabricated) coaxial parts, of which the inner would have a conical outer shape and the outer 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 'of FIG. 4 and 5 is analogous to the already described installation and removal of the purge stones 10 and 10' of FIG. 1 to 3.
  • the refractory mass with advantage brought out with a drilling tool 36 to bring out a worn sleeve (see Fig. 4).
  • the gap has a shape other than an annular shape (for example, square 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 pressing in (see feeder 38 in FIG.
  • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

A container for molten metal has at least one opening (4; 24) in which a refractory nozzle brick (5; 5'; 25; 25') is mounted. A refractory purge plug (10; 10') or a refractory sleeve (30; 30') defining an outlet opening (31; 31') is inserted in the nozzle brick opening (6; 6'; 26; 26'). A defined gap is formed between the nozzle brick opening (6; 6'; 26; 26') and the purge plug (10; 10') or the sleeve (30; 30') and is filled with a refractory mass, said mass consisting of a material which can be easily bored or milled out of the mass for the purpose of replacing the purge plug (10; 10') or the sleeve (30; 30'). In this manner, laborious cleaning steps can be avoided and the nozzle brick no longer risks being damaged.

Description

Verfahren zur auswechselbaren Befestigung eines feuerfesten Spülsteines oder Hülse sowie ein Behälter für Metallschmelze Method for the interchangeable attachment of a refractory sink or sleeve and a container for molten metal
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 koni-Conventionally, conical refractory purging pits (purging sleeves), via which gas is introduced into the molten metal, or conventionally
BESTÄTIGUNGSKOPK sche 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.BESTÄTIGUNGSKOPK cal refractory sleeves, each forming a spout opening, inserted into appropriately trained hole stone 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 Spülsteinbzw. 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 un- gleichmässige Mörtelstärke entstehen, oder es kann beim manuell erfolgendem Einbau des Spülsteines bzw. der Hülse der Mörtel örtlich un- gleichmässig 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 hole stone repairs after each Spülsteinbzw. Needle change necessary. The cleaning work on the hot refractory parts are dangerous and mean a heavy work. When applying the mortar to the sink or to the sleeve uneven mortar strength may arise, or it may be locally uneven or even locally completely stripped during manual installation of the sink 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.
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. Diese Aufgabe wird erfindungsgemäss durch ein Verfahren mit den Merkmalen des Anspruches 1 sowie durch einen Behälter nach Anspruch 7 gelöst.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. This object is achieved according to the invention by a method having the features of claim 1 and by a container according to claim 7.
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). Die Erfindung wird nachfolgend anhand der Zeichnung näher erläutert. Es zeigen: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-wear of the perforated brick can be automatically remedied when changing the sink or the sleeve (the refractory mass filling a gap between the perforated brick opening and the sink or the sleeve is also distributed to the worn areas of the perforated brick). The invention will be explained in more detail with reference to the drawing. Show it:
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;1 shows a part of a container for molten metal with a refractory perforated stone inserted in an opening and a built-in perforated brick refractory purge to be replaced;
Fig. 2 den Behälterteil nach Fig. 1 mit einem neuen feuerfesten Spülstein;Fig. 2 shows the container part of Figure 1 with a new refractory sink.
Fig. 3 eine der Fig. 1 entsprechende Darstellung mit einer anderen Variante eines feuerfesten Spülsteines;Fig. 3 is a representation corresponding to Figure 1 with another variant of a refractory purging plug.
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; und4 shows a part of a molten metal container with a perforated brick inserted in an opening and a refractory sleeve installed in the perforated brick and forming a pour opening, which is to be replaced; and
Fig. 5 eine weitere Aus führungs form des Lochsteines und der darin eingebauten, eine Ausgussöffnung bildenden, neuen feuerfesten Hülse.Fig. 5 shows a further imple mentation of the perforated stone and the built-in, forming a spout opening, new refractory sleeve.
In Fig. l 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. L and 2, a part of a container 1 for molten metal, for example, 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 1 1, 12 besteht. Der innere Teil 1 1 mit einem Gasanschluss 13, der einem konventionellen Spülstein ent- spricht, wie sie zum Einleiten von Gas in die Metallschmelze verwendet werden, weist eine konische Aussenfläche I Ia 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 1 and 2, a refractory sink 10 is used according to the invention consists of two in one piece (prefabricated), coaxial parts 1 1, 12 consists. The inner part 11 with a gas connection 13, which corresponds to a conventional sink speaks, as they are used to introduce gas into the molten metal, has a conical outer surface I Ia, the outer part 12 has 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, e.g. Crown drill, are used, as indicated in Fig. 1. 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. 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.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. As indicated in Fig. 2, then a bottom plate 17 is placed on the container 1 and the gap 15 is filled with the refractory material, 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 Aussenflä- che 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 sink 10 'which is installed in a perforated block 5' and which has a cylindrical outer surface 10a. Between this outer surface 10a and a cylindrical perforated stone opening 6 'of the perforated brick 5' there is again a gap 15 'which can be filled with a refractory mass. 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 material for the expansion 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 be quite conically tapered or widened in a vertical direction, or angular in horizontal cross section, and then for removing the refractory mass instead of drilling tools 16, 16 'according to FIGS. 1 and 3, milling tools such as e.g. End mill would use.
In der gleichen Art und Weise, wie die Spülsteine, können erfindungsge- mäss auch feuerfeste Hülsen, die eine Ausgussöffnung bilden, in entspre- chende 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 an- schliesst, mit dem die Ausgussöffnung geschlossen oder geöffnet gehalten werden kann.In the same way as the purging blocks, according to the invention, refractory sleeves which form a pouring opening can also be provided in accordance with the invention. chende openings of the container for molten metal or in the hole bricks used there are installed. These are sleeves, to each of which the uppermost closure plate of a sliding closure connects, with which the spout opening can be closed or kept open.
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 um- schliesst.FIG. 4 shows a perforated brick 25 with a perforated stone opening 26 installed in an opening 24 of the container 1 for molten metal. A refractory sleeve 30 having a pouring opening 31 is inserted into the perforated brick opening 26. 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 stone 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.In a variant shown in FIG. 5, this space 32 'is provided in the sleeve 30' and the conically widening part 31a 'is 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 of Figures 1 and 2, the sleeve could also consist of two co-manufactured (prefabricated) coaxial parts, of which the inner would have a conical outer shape and the outer 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 'of FIG. 4 and 5 is analogous to the already described installation and removal of the purge stones 10 and 10' of FIG. 1 to 3. From an annular gap, the refractory mass with advantage brought out 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 (for example, square 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 pressing in (see feeder 38 in FIG.
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

PATENTANSPRÜCHE
1. Verfahren zum Ein- und Ausbau eines feuerfesten Spülsteines (10; 10') oder einer eine Ausgussöffnung (31, 31 ') bildenden feuerfesten Hülse (30; 30') in einen und aus einem Lochstein (5; 5'; 25; 25'), der in einer Öffnung (4; 24) eines Behälters (1) für Metallschmelze eingesetzt ist und eine Lochsteinöffnung (6; 6'; 26; 26') aufweist, dadurch gekennzeichnet, dass ein neuer Spülstein (10; 10') bzw. eine neue Hülse (30; 30') in die Lochsteinöffnung (6; 6'; 26; 26') eingeführt und in dieser positioniert und fixiert wird, wonach ein zwischen der Lochsteinöffnung (6; 6'; 26; 26') und dem Spülstein (10; 10') bzw. der Hülse (30; 30') vorhandener Spalt (15; 15'; 35; 35') mit einer feuerfesten Masse gefüllt wird, wobei zum Ausbau eines verschlissenen Spülsteines (10; 10') bzw. einer verschlissenen Hülse (30; 30') die feuerfeste Masse aus dem Spalt (15; 15'; 35; 35') entfernt wird und der dadurch losgelöste Spülstein bzw. die Hülse ersetzt werden kann. A method for installing and removing a refractory purge plug (10, 10 ') or a refractory sleeve (30, 30') forming a spout opening (31, 31 ') into and out of a perforated brick (5, 5', 25; 25 ') which is inserted in an opening (4; 24) of a container (1) for molten metal and has a perforated brick opening (6; 6';26; 26 '), characterized in that a new flushing brick (10; ) or a new sleeve (30; 30 ') is introduced into the perforated stone opening (6; 6';26; 26 ') and is positioned and fixed therein, after which a perforation between the perforated brick opening (6; 6';26; ) and the purging plug (10, 10 ') or the sleeve (30, 30') existing gap (15, 15 ', 35, 35') is filled with a refractory material, wherein for removing a worn purging plug (10; ') or a worn sleeve (30, 30'), the refractory material from the gap (15, 15 ', 35, 35') is removed and the thereby detached purging plug or the sleeve can be replaced.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass aus einem ringförmigen Spalt (15; 15'; 35; 35') zwischen dem verschlissenen Spülstein (10; 10') bzw. der Hülse (30; 30') und dem Lochstein (5; 5'; 25; 25') die feuerfeste Masse mittels eines Bohrers (16; 16'; 36) , vorzugsweise eines Kronenbohrers, herausgebohrt bzw. herausgefräst und/oder mittels einer oder mehreren Lanzen ausgebrannt wird.2. The method according to claim 1, characterized in that from an annular gap (15, 15 ', 35, 35') between the worn purging plug (10, 10 ') or the sleeve (30, 30') and the perforated brick ( 5; 5 '; 25; 25') the refractory mass is drilled or burned out by means of a drill (16; 16 '; 36), preferably a crown drill, and / or burnt out by means of one or more lances.
3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass aus einem sich vertikal konisch verjüngenden oder erweiternden oder einem im horizontalen Querschnitt eckigen Spalt zwischen dem verschlissenen Lochstein und dem Spülstein bzw. der Hülse die feuerfeste Masse herausgefräst wird, vorzugsweise mit Fingerfräsern.3. The method according to claim 1, characterized in that the refractory material is milled out of a vertically conically tapered or widening or in a horizontal cross-section gap between the worn hole stone and the sink or the sleeve, preferably with end mills.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Einführen des neuen Spülsteines (10; 10') bzw. der neuen Hülse (30; 30') in die Lochsteinöffnung (6; 6'; 26; 26') mittels einer Vorrichtung, wie beispielsweise eines Roboters, eines Hebezeuges oder einer Schubstange, erfolgt.4. The method according to any one of claims 1 to 3, characterized in that the introduction of the new purging plug (10; 10 ') or the new sleeve (30; 30') in the hole stone opening (6; 6 '; 26; 26' ) by means of a device, such as a robot, a hoist or a push rod occurs.
5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Positionierung des neuen Spülsteines (10; 10') bzw. der neuen Hülse (30; 30') in der Lochsteinöffnung (6; 6'; 26; 26') durch Laservermessung und/oder optische Methoden unterstützt wird. 5. The method according to any one of claims 1 to 4, characterized in that the positioning of the new purging plug (10; 10 ') or the new sleeve (30; 30') in the perforated brick opening (6; 6 ';26;26' ) is supported by laser measurement and / or optical methods.
6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Spalt (15; 15'; 35; 35') zwischen dem Lochstein (5; 5'; 25; 25') und dem neuen Spülstein (10; 10') bzw. der neuen Hülse (30; 30') mit der feuerfesten Masse mittels einer Pumpe, durch Vergiessen, Spritzen oder Eindrücken ausgefüllt wird.6. The method according to any one of claims 1 to 5, characterized in that the gap (15, 15 ', 35, 35') between the perforated brick (5, 5 ', 25, 25') and the new sink (10, 10 ') or the new sleeve (30, 30') is filled with the refractory material by means of a pump, by casting, spraying or pressing.
7. Behälter für Metallschmelze zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 6, mit mindestens einer Öffnung (4; 24), in welche ein feuerfester Lochstein (5; 5'; 25; 25') eingebaut ist, und mit einem in eine Lochsteinöffnung (6; 6'; 26; 26') eingesetzten feuerfesten Spülstein (10; 10') oder einer eine Ausgussöffnung (31 ; 31 ') bildenden feuerfesten Hülse (30; 30'), dadurch gekennzeichnet, dass zwischen der Lochsteinöffnung (6; 6'; 26; 26') und dem Spülstein (10; 10') bzw. der Hülse (30; 30') ein mit einer feuerfesten Masse gefüllter definierter Spalt (15; 15'; 35; 35') gebildet ist, wobei die Masse aus einem solchen Material besteht, dass sie zwecks Auswechseln des Spülsteines (10; 10') bzw. der Hülse (30; 30') entfernbar werden kann.7. A molten metal container for carrying out the method according to one of claims 1 to 6, having at least one opening (4; 24), in which a refractory perforated brick (5; 5 '; 25; 25') is installed, and having a a refractory purging plug (10; 10 ') or a pouring opening (31; 31') forming a perforated brick opening (6; 6 '; 26; 26'), characterized in that between the perforated brick opening ( 6; 6 '; 26; 26') and the purging plug (10; 10 ') or the sleeve (30; 30') is a defined gap (15; 15 '; 35; 35') filled with a refractory mass in that the mass consists of such a material that it can be removed in order to replace the purging plug (10; 10 ') or the sleeve (30; 30').
8. Behälter nach Anspruch 7, dadurch gekennzeichnet, dass der Spalt (15; 15'; 35; 35') eine Breite von 10 bis 100 mm aufweist.8. A container according to claim 7, characterized in that the gap (15, 15 ', 35, 35') has a width of 10 to 100 mm.
9. Behälter nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass der Spülstein (10; 10') bzw. die Hülse (30; 30') eine zylindrische Aussenflä- che (12b; 10a; 30a; 30a') aufweist und der Spalt (15; 15'; 35; 35') ringförmig ist. 9. Container according to claim 7 or 8, characterized in that the purging plug (10; 10 ') or the sleeve (30; 30') has a cylindrical outer surface (12b; 10a; 30a; 30a ') and the gap (15; 15 ';35;35') is annular.
10. Behälter nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass der Spülstein (10) bzw. die Hülse aus zwei in einem Stück gefertigten koaxialen Teilen (1 1, 12) besteht, von denen der innere eine konische Aussen- form und der äussere eine entsprechende konische Innenform aufweist, wobei der mit der feuerfesten Masse ausgefüllte Spalt (15) zwischen einer Aussenfläche (12b) des äusseren Teiles (12) und der Lochsteinöffnung (6) gebildet ist.10. A container according to claim 7 or 8, characterized in that the purging plug (10) or the sleeve consists of two coaxial parts (1 1, 12) made in one piece, of which the inner a conical outer shape and the outer a corresponding conical inner shape, wherein the filled with the refractory mass gap (15) between an outer surface (12b) of the outer part (12) and the perforated brick opening (6) is formed.
11. Behälter nach Anspruch 10, dadurch gekennzeichnet, dass die Aussenfläche (12b) eines äusseren Teiles (12) zylindrisch und der Spalt (15) ringförmig ist.11. A container according to claim 10, characterized in that the outer surface (12b) of an outer part (12) is cylindrical and the gap (15) is annular.
12. Behälter nach einem der Ansprüche 7 bis 11, dadurch gekennzeichnet, dass die Lochsteinöffnung (6; 6'; 26; 26') zylindrisch ist.12. A container according to any one of claims 7 to 11, characterized in that the perforated brick opening (6; 6 '; 26; 26') is cylindrical.
13. Feuerfester Spülstein für einen Behälter nach einem der Ansprüche 7 bis 12, dadurch gekennzeichnet, dass der Spülstein (10; 10') eine annähernd zylindrische Aussenfläche (12b; 10a; 30a; 30a') aufweist.13. Refractory purging plug for a container according to one of claims 7 to 12, characterized in that the purging plug (10, 10 ') has an approximately cylindrical outer surface (12b, 10a, 30a, 30a').
14. Feuerfester Spülstein für einen Behälter nach einem der Ansprüche 7 bis 12, dadurch gekennzeichnet, dass der Spülstein (10) aus zwei in einem Stück gefertigten Teilen (1 1, 12) besteht, von denen der innere eine konische Aussenform und der äussere eine entsprechende konische Innenform aufweist.14. Refractory purging plug for a container according to one of claims 7 to 12, characterized in that the purging plug (10) consists of two parts made in one piece (1 1, 12), of which the inner a conical outer shape and the outer one having corresponding conical inner shape.
15. Feuerfeste Hülse für einen Behälter nach einem der Ansprüche 7 bis 12, dadurch gekennzeichnet, dass die Hülse (30; 30') eine annähernd zylindrische Aussenfläche (12b; 10a; 30a; 30a') aufweist. 15. A refractory sleeve for a container according to one of claims 7 to 12, characterized in that the sleeve (30, 30 ') has an approximately cylindrical outer surface (12b; 10a; 30a; 30a').
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)

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