EP0741854B2 - Process and device for producing steel casting ladle monolithic fire-proof lining - Google Patents

Process and device for producing steel casting ladle monolithic fire-proof lining Download PDF

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Publication number
EP0741854B2
EP0741854B2 EP95908262A EP95908262A EP0741854B2 EP 0741854 B2 EP0741854 B2 EP 0741854B2 EP 95908262 A EP95908262 A EP 95908262A EP 95908262 A EP95908262 A EP 95908262A EP 0741854 B2 EP0741854 B2 EP 0741854B2
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Prior art keywords
template
refractory
lining
wall
members
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EP95908262A
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German (de)
French (fr)
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EP0741854B1 (en
EP0741854A1 (en
Inventor
Heinz Werner Stripp
Horst Tiemann
Roland Kessler
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WUELFRATHER FEUERFEST UND DOLOMITWERKE GMBH & CO.
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Wuelfrather Feuerfest und Dolomitwerke & Co Kg GmbH
Dolomitwerke GmbH
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Application filed by Wuelfrather Feuerfest und Dolomitwerke & Co Kg GmbH, Dolomitwerke GmbH filed Critical Wuelfrather Feuerfest und Dolomitwerke & Co Kg GmbH
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    • 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
    • B22D41/023—Apparatus used for making or repairing linings

Definitions

  • the invention relates to a method for manufacturing a refractory monolithic lining from Wall and bottom of a pan for pouring and treating of steel or similar metallurgical vessels and an apparatus for performing the method.
  • the structure is made of refractory Lining of metallurgical vessels from permanent feed and working feed.
  • Usually are used as permanent feed Firebricks or insulating bricks in one or several layers on the steel jacket of the vessel inside applied.
  • the working feed is applied to it, that later in contact with the molten steel stands and due to erosion, especially when moving the metal bath, as well as by chemical attack, in particular by floating on the molten steel Slag is removed.
  • the working lining can be bricked with refractory bricks are introduced or introduced as a refractory mass that solidify into a monolithic layer. Combinations of these two types of delivery are also possible.
  • the working feed is after repeated filling and emptying the pan either at the end of the pan trip completely broken out and renewed or with only partial leading wear in the affected Zones repaired.
  • the floor wears out frequently faster than the wall, especially in the area of the Pouring jet impacts and in the vicinity of sink blocks. Then the soil must be fed during a pan trip be broken out and renewed several times.
  • the object of the present invention is therefore with a monolithically delivered steel casting and treatment ladle to feed the soil so that a breakout of the floor lining between the wall lining without damaging wall areas in economical is made possible in a favorable manner.
  • the task is solved in that at the beginning of pouring the casting compound into the wall area a tubular, attached to the lower part of the template, inflatable sealing body is inflated so that the template is up to the height of the desired one Floor thickness corresponds, seals. Once the setting the casting compound in the lower wall area is sufficient is advanced, the sealing body is relaxed and removed again. Then the refractory Casting compound in the floor area up to the desired height brought in.
  • the sealing body After inflating the sealing body is first poured the wall lining, the sealing body preventing that the mass runs into the ground. If the wall lining is poured to the edge of the pan is, the lower part of the lining begins, which is the sealing body touches, starting from the surface already easy to solidify so that the sealing body relaxes and can be removed. After that, before the Stencil is drawn, the floor up to the predetermined Poured height. The soil lining builds up this way with the wall lining no monolith more, but there is a predetermined breaking edge. Because joint formation is avoided later in use the pan also has no infiltration of molten steel instead of. After the setting time, which is usually up to can be ten hours, the template is made the pan pulled out and the pan food on Operating temperature warmed up.
  • Fig. 1 shows the perspective view of a steel pouring and treatment pan with (from outside to inside) the Steel jacket, the permanent lining provided with stones, the working lining in the wall with mass and the template (4).
  • the pan bottom is not yet delivered with monolithic mass. It is a dishwashing and a tap hole brick recognizable as well as a cast one Prefabricated component made of high-alumina material as a baffle plate on the permanent feed.
  • the stencil stands on fire-proof support bodies (1), which have the same height as the perforated stones.
  • the bottom edge of the template (4) is on the inside Ledge (3) on the tubular, inflatable Sealing body (2) made of flexible material are attached.
  • the Sealing bodies (2) can, for example, be made of reinforced plastic Rubber.
  • Fig. 2 shows the longitudinal section through the pan Area at the bottom of the template (4).
  • Something above the lower edge of the template (4) is a Ring attached, which carries a bar (3) on the inside.
  • the strip (3) is made of a tubular sealing body (2) attached flexible material.
  • To protect against damage is the sealing body (2) on the refractory Material facing side with a protective strip (5) made of tear-resistant, flexible material.
  • Fig. 3 shows a top view of the pan bottom.
  • the refractory support body (1) is shown in the sectional view, which, for example, be frustoconical can, and two sealing bodies (2) cut to size are that they are inflated without further ado Aid is sufficiently close to the support body (1) invest.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung einer feuerfesten monolithischen Auskleidung von Wand und Boden einer Pfanne zum Vergießen und Behandeln von Stahl oder ähnlichen metallurgischen Gefäßen und eine Vorrichtung zur Durchführung des Verfahrens.The invention relates to a method for manufacturing a refractory monolithic lining from Wall and bottom of a pan for pouring and treating of steel or similar metallurgical vessels and an apparatus for performing the method.

Üblicherweise besteht der Aufbau der feuerfesten Auskleidung von metallurgischen Gefäßen aus Dauerfutter und Arbeitsfutter. Als Dauerfutter werden üblicherweise Schamottesteine oder Isoliersteine in einer oder mehreren Lagen auf den Stahlmantel des Gefäßes innen aufgebracht. Darauf wird das Arbeitsfutter aufgebracht, das später mit der Stahlschmelze in Berührung steht und durch Erosion, insbesondere bei Bewegung des Metallbades, sowie durch chemischen Angriff, insbesondere durch die auf der Stahlschmelze schwimmende Schlacke, abgetragen wird.Usually the structure is made of refractory Lining of metallurgical vessels from permanent feed and working feed. Usually are used as permanent feed Firebricks or insulating bricks in one or several layers on the steel jacket of the vessel inside applied. The working feed is applied to it, that later in contact with the molten steel stands and due to erosion, especially when moving the metal bath, as well as by chemical attack, in particular by floating on the molten steel Slag is removed.

Das Arbeitsfutter kann mit feuerfesten Steinen gemauert werden oder als feuerfeste Masse eingebracht werden, die zu einer monolithischen Schicht erstarrt. Kombinationen dieser beiden Zustellungsarten sind ebenfalls möglich.The working lining can be bricked with refractory bricks are introduced or introduced as a refractory mass that solidify into a monolithic layer. Combinations of these two types of delivery are also possible.

Bei Betrachtung der Wirtschaftlichkeit unter Berücksichtigung sowohl der Materialkosten und der Haltbarkeiten, wie auch der Zustellzeiten und der Anforderungen an das Personal erweist sich die monolithische Zustellung häufig als günstiger gegenüber der gemauerten Zustellung. Da in der Regel der Verschleiß in verschiedenen Wand- und Bodenbereichen der Pfanne unterschiedlich ist, wird häufig die Zustellung in Zonen aufgeteilt, die unterschiedliche Stärken des Arbeitsfutters und/oder unterschiedlich resistente Feuerfestsorten aufweisen.When considering the economy taking into account both the material costs and the shelf life, as well as delivery times and requirements the monolithic turns out to the staff Delivery is often cheaper than the brick Delivery. As a rule, the wear in different Wall and floor areas of the pan differ delivery is often divided into zones, the different strengths of the working feed and / or differently resistant refractories exhibit.

Das Arbeitsfutter wird nach mehrmaligem Befüllen und Entleeren der Pfanne entweder am Ende der Pfannenreise vollständig ausgebrochen und erneuert oder bei nurteilweisem voreilendem Verschleiß in den betroffenen Zonen repariert. Der Boden verschleißt häufig schneller als die Wand, insbesondere im Bereich des Gießstrahlaufpralls und in der Umgebung von Spülsteinen. Dann muß das Bodenfutter während einer Pfannenreise mehrmals ausgebrochen und erneuert werden.The working feed is after repeated filling and emptying the pan either at the end of the pan trip completely broken out and renewed or with only partial leading wear in the affected Zones repaired. The floor wears out frequently faster than the wall, especially in the area of the Pouring jet impacts and in the vicinity of sink blocks. Then the soil must be fed during a pan trip be broken out and renewed several times.

Ausschließlich für die Wandzustellung ist aus SU-A-178955 eine Vorrichtung bekannt, mit der durch radiales Pressen mittels ausziehbarer und in der Höhe verstellbarer Schablonenringe die eingefüllte Masse zu den Wänden der Pfanne hin verdichtet wird.Exclusively for wall infeed is from SU-A-178955 known a device with which by radial Pressing by means of pull-out and in height adjustable stencil rings to the filled mass the walls of the pan is compressed.

Bekannt ist weiterhin z. B. aus DE-Z Stahl und Eisen Special, Oktober 1992, S. 117-120 ein Zustellverfahren, bei dem das Arbeitsfutter von Stahlgießpfannen mit feuerfestem Beton zugestellt wird. Dafür ist eine Schablone erforderlich, die die Innenkontur des fertig betonierten Arbeitsfutters vorgibt. Die Masse wird in den Spalt zwischen Dauerfutter und Schablone gegossen. Um Arbeitszeit zu sparen und die Verfügbarkeit der Pfannen zu erhöhen, kann der Boden und das Wandfutter in einem Arbeitsgang betoniert werden. Auf diese Weise bilden Boden und Wand ein einziges monolithisches Futter.It is also known, for. B. from DE-Z steel and iron Special, October 1992, pp. 117-120 a delivery procedure, in which the working feed of steel ladles is delivered with refractory concrete. For that is one Stencil required that finished the inside contour of the concrete feed. The mass is in the Gap between permanent food and stencil poured. To save working time and the availability of the Pans can raise the bottom and the wall lining can be concreted in one operation. To this The floor and wall form a single monolithic way Feed.

Zur Durchführung des Gießvorganges werden üblicherweise Mischer, Pumpen sowie Innenrüttler eingesetzt. Das Vergießen über die Dauer von beispielsweise drei Stunden muß kontinuierlich durchgeführt werden, um mögliche Aushärtungen im Oberflächenbereich zu vermeiden. Durch die Vibratoren soll die Bildung von Hohlstellen und Lunkern verhindert werden, um eine gute Verdichtung zu erzielen. Wenn die Masse beispielsweise nach 24 Stunden abgebunden hat, kann die Schablone wieder herausgezogen werden.To carry out the casting process are usually Mixers, pumps and internal vibrators are used. The shedding over the duration of, for example three hours must be done continuously to prevent possible hardening in the surface area avoid. The vibrators are said to form Cavities and cavities are prevented to good To achieve compaction. If the mass, for example has set after 24 hours, the Template be pulled out again.

Bei monolithischer Zustellung von Wand und Boden hat sich als nachteilig herausgestellt, daß bei voreilendem Verschleiß im Boden beim Ausbrechen des restlichen Bodenfutters meistens der untere Teil des sonst noch intakten Wandfutters beschädigt wird, weil Boden-und Wandfutter ein Monolith sind. Dies kann dazu führen, daß ein großer Teil des Wandfutters vorzeitig ausgebrochen werden muß.With monolithic inlay of wall and floor has been found to be disadvantageous in that when leading Wear in the ground when the rest breaks out Soil feed is usually the lower part of the otherwise still intact wall lining is damaged because of floor and Wall linings are a monolith. This can cause that a large part of the wall lining broke out prematurely must become.

Um die Schwierigkeiten beim Ausbrechen des Bodens zu vermeiden, kann man auch so verfahren, daß mit einer bis auf das Dauerfutter des Bodens reichenden Schablone in einem ersten Arbeitsgang nur die Wand zugestellt wird. Nach dem Abbinden der Gießmasse und anschließendem Ziehen der Schablone wird der Boden in einem zweiten Arbeitsgang gegossen. Dadurch ergibt sich beim späteren Ausbruch des Bodens eine Sollbruchkante, welche Beschädigungen im Wandbereich verhindert. Nachteilig ist, daß danach für den Boden der Abbindevorgang noch einmal abgewartet werden muß, bevor die Pfanne wieder in Betrieb gehen kann, so daß die Zustellzeit sich insgesamt fast verdoppelt.The difficulty of breaking out the ground to avoid, you can also do that with one reaching down to the permanent lining of the soil In a first step, only stencil the wall is delivered. After the casting compound has set and then dragging the template Soil poured in a second pass. Thereby results from the later eruption of the soil a predetermined breaking edge, which damage in the wall area prevented. The disadvantage is that after that for the Wait for the bottom of the setting process again must be in place before the pan can be used again can, so that the delivery time almost doubles overall.

Aufgabe der vorliegenden Erfindung ist es daher, bei einer monolithisch zugestellten Stahlgieß- und Behandlungspfanne das Bodenfutter so zuzustellen, daß ein Ausbrechen des Bodenfutters zwischen dem Wandfutter ohne Beschädigung von Wandbereichen in wirtschaftlich günstiger Weise ermöglicht wird.The object of the present invention is therefore with a monolithically delivered steel casting and treatment ladle to feed the soil so that a breakout of the floor lining between the wall lining without damaging wall areas in economical is made possible in a favorable manner.

Die Aufgabe wird dadurch gelöst, daß bei Beginn des Einbringens der Gießmasse in den Wandbereich ein am unteren Teil der Schablone befestigter schlauchförmiger, aufblasbarer Dichtkörper so aufgeblasen wird, daß er die Schablone bis zur Höhe, die der gewünschten Bodenstärke entspricht, abdichtet. Sobald das Abbinden der Gießmasse im unteren Wandbereich genügend fortgeschritten ist, wird der Dichtkörper entspannt und wieder entfernt. Anschließend wird die feuerfeste Gießmasse im Bodenbereich bis zur gewünschten Höhe eingebracht.The task is solved in that at the beginning of pouring the casting compound into the wall area a tubular, attached to the lower part of the template, inflatable sealing body is inflated so that the template is up to the height of the desired one Floor thickness corresponds, seals. Once the setting the casting compound in the lower wall area is sufficient is advanced, the sealing body is relaxed and removed again. Then the refractory Casting compound in the floor area up to the desired height brought in.

Eine zur Durchführung des Verfahrens geeignete Vorrichtung besteht nach dem Kennzeichung des Ansprüchs 2 darin, daß die Schablone auf drei über den Umfang verteilten feuerfesten Körpern (1) steht, die die gleiche Höhe haben wie die gewünschte Stärke für das Bodenfutter. In den Zwischenräumen zwischen diesen feuerfesten Körpern sind schlauchförmige Dichtkörper (2) am unteren, nach innen eingezogenen Rand der Schablone angebracht, die aufgeblasen und wieder entfernt werden können.One to carry out Device suitable for the method exists according to the characterization of claim 2 in that the template was distributed over the circumference in three refractory bodies (1) stands at the same height have the desired thickness for the floor lining. In the gaps between these refractories Bodies are tubular sealing bodies (2) on lower, retracted edge of the stencil attached, which inflated and can be removed again.

Nach dem Aufblasen der Dichtkörper wird zuerst das Wandfutter gegossen, wobei die Dichtkörper verhindern, daß die Masse in den Boden hineinläuft. Wenn das Wandfutter bis zum Pfannenrand fertig gegossen ist, beginnt der untere Teil des Futters, der die Dichtkörper berührt, sich von der Oberfläche ausgehend bereits leicht zu verfestigen, so daß die Dichtkörper entspannt und entfernt werden können. Danach wird, bevor die Schablone gezogen wird, der Boden bis zur vorbestimmten Höhe gegossen. Das Bodenfutter bildet auf diese Weise mit dem Wandfutter keinen Monolithen mehr, sondern es entsteht eine Sollbruchkante. Da Fugenbildung vermieden wird, findet später beim Einsatz der Pfanne auch keine Infiltration von Stahlschmelze statt. Nach der Abbindezeit, die üblicherweise bis zu zehn Stunden betragen kann, wird die Schablone aus der Pfanne herausgezogen und das Pfannenfutter auf Betriebstemperatur aufgeheizt.After inflating the sealing body is first poured the wall lining, the sealing body preventing that the mass runs into the ground. If the wall lining is poured to the edge of the pan is, the lower part of the lining begins, which is the sealing body touches, starting from the surface already easy to solidify so that the sealing body relaxes and can be removed. After that, before the Stencil is drawn, the floor up to the predetermined Poured height. The soil lining builds up this way with the wall lining no monolith more, but there is a predetermined breaking edge. Because joint formation is avoided later in use the pan also has no infiltration of molten steel instead of. After the setting time, which is usually up to can be ten hours, the template is made the pan pulled out and the pan food on Operating temperature warmed up.

Die Erfindung wird nachstehend anhand der Zeichnungen Fig. 1 bis Fig. 3 näher erläutert. Fig. 1 zeigt die perspektivische Darstellung einer Stahlgieß- und Behandlungspfanne mit (von außen nach innen) dem Stahlmantel, dem mit Steinen zugestellten Dauerfutter, dem mit Masse zugestellten Arbeitsfutter in der Wand und der Schablone (4). Der Pfannenboden ist noch nicht mit monolithischer Masse zugestellt. Es sind ein Spül-und ein Abstichlochstein erkennbar sowie ein gegossenes Fertigbauteil aus tonerdereichem Material als Prallplatte auf dem Dauerfutter.The invention is described below with reference to the drawings Fig. 1 to Fig. 3 explained in more detail. Fig. 1 shows the perspective view of a steel pouring and treatment pan with (from outside to inside) the Steel jacket, the permanent lining provided with stones, the working lining in the wall with mass and the template (4). The pan bottom is not yet delivered with monolithic mass. It is a dishwashing and a tap hole brick recognizable as well as a cast one Prefabricated component made of high-alumina material as a baffle plate on the permanent feed.

Die Schablone steht auf feuerfesten Stützkörpern (1), die die gleiche Höhe wie die Lochsteine haben. Am unteren Rand der Schablone (4) befindet sich innen eine Leiste (3), an der schlauchförmige, aufblasbare Dichtkörper (2) aus flexiblem Material befestigt sind. Die Dichtkörper (2) können beispielsweise aus kunststoffverstärktem Gummi bestehen.The stencil stands on fire-proof support bodies (1), which have the same height as the perforated stones. At the The bottom edge of the template (4) is on the inside Ledge (3) on the tubular, inflatable Sealing body (2) made of flexible material are attached. The Sealing bodies (2) can, for example, be made of reinforced plastic Rubber.

Fig. 2 zeigt im Längsschnitt durch die Pfanne den Bereich am unteren Ende der Schablone (4). Etwas oberhalb des unteren Randes der Schablone (4) ist ein Ring angebracht, der innen eine Leiste (3) trägt. An der Leiste (3) ist ein schlauchförmiger Dichtkörper (2) aus flexiblem Material befestigt. Zum Schutz vor Beschädigungen ist der Dichtkörper (2) an der dem feuerfesten Material zugewandten Seite mit einem Schutzstreifen (5) aus reißfestem, biegsamen Material versehen.Fig. 2 shows the longitudinal section through the pan Area at the bottom of the template (4). Something above the lower edge of the template (4) is a Ring attached, which carries a bar (3) on the inside. At the The strip (3) is made of a tubular sealing body (2) attached flexible material. To protect against damage is the sealing body (2) on the refractory Material facing side with a protective strip (5) made of tear-resistant, flexible material.

Fig. 3 zeigt eine Aufsicht auf den Pfannenboden. Gezeigt ist im Schnittbild der feuerfeste Stützkörper (1), der zum Beispiel kegelstumpfförmig ausgebildet sein kann, und zwei Dichtkörper (2), die so zugeschnitten sind, daß sie im aufgeblasenen Zustand ohne weitere Hilfsmittel sich genügend dicht an den Stützkörper (1) anlegen.Fig. 3 shows a top view of the pan bottom. The refractory support body (1) is shown in the sectional view, which, for example, be frustoconical can, and two sealing bodies (2) cut to size are that they are inflated without further ado Aid is sufficiently close to the support body (1) invest.

Claims (2)

  1. A method of producing a refractory lining for the wall and bottom of the steel casting and handling ladle by sealing the annular space between a template (4) and the outer lining with a refractory casting composition, characterised in that, at the start of the introduction of the casting composition into the wall area, an inflatable tubular sealing member (2) attached to the lower part of the template (4) is inflated in such a way that it seals the template (4) up to the level corresponding to the desired thickness of the bottom and in that, as soon as the casting composition in the lower wall area is sufficiently set, the sealing member (2) is deflated and removed and the refractory casting composition is then introduced into the bottom area up to the desired level.
  2. A device comprising a template (4) as well as mixers, pumps and internal vibrators and an inflatable tubular sealing member (2) for carrying out the method according to claim 1, characterised in that the template (4) stands on at least three refractory members (1) distributed about the circumference, which members (1) extend to the same level as the desired thickness of the bottom lining, and in that tubular sealing members (2), which may be inflated and subsequently removed, are attached to the lower, inwardly flanged edge of the template (4) in the interspaces between these refractory members (1).
EP95908262A 1994-02-03 1995-02-03 Process and device for producing steel casting ladle monolithic fire-proof lining Expired - Lifetime EP0741854B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4403270A DE4403270C2 (en) 1994-02-03 1994-02-03 Method and device for producing a monolithic refractory lining of steel ladles
DE4403270 1994-02-03
PCT/EP1995/000399 WO1995021364A1 (en) 1994-02-03 1995-02-03 Process and device for producing steel casting ladle monolithic fire-proof lining

Publications (3)

Publication Number Publication Date
EP0741854A1 EP0741854A1 (en) 1996-11-13
EP0741854B1 EP0741854B1 (en) 1998-04-15
EP0741854B2 true EP0741854B2 (en) 2002-08-28

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US (1) US5993703A (en)
EP (1) EP0741854B2 (en)
CZ (1) CZ284816B6 (en)
DE (2) DE4403270C2 (en)
ES (1) ES2116728T5 (en)
FI (1) FI111878B (en)
PL (1) PL178274B1 (en)
WO (1) WO1995021364A1 (en)
ZA (1) ZA95856B (en)

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DE19724509A1 (en) * 1997-06-11 1998-12-24 Gft Ges Fuer Feuerfest Technik Component refractory lining production and repair
DE19802207C2 (en) * 1998-01-22 2002-12-19 Intocast Ag Feuerfest Produkte Template for lining ladles
DE19802222C2 (en) * 1998-01-22 2002-08-08 Intocast Ag Feuerfest Produkte Metallurgical smelting containers
CN101700572B (en) * 2009-11-20 2011-08-03 武汉钢铁(集团)公司 Method for building container bottom of carbon-containing molten steel container
DE202013012201U1 (en) * 2013-12-10 2015-08-03 Refratechnik Holding Gmbh Heavy clay fireproof product
JP6493449B2 (en) * 2016-06-23 2019-04-03 Ｊｆｅスチール株式会社 Construction method and formwork of molten steel pan
CN112643018A (en) * 2020-12-09 2021-04-13 攀枝花钢城集团有限公司 Method for building long-life ladle bottom of ladle

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JPH0389392U (en) † 1989-12-27 1991-09-11

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Stahl und Eisen Special", Oktober 1992, S. 103-108 †

Also Published As

Publication number Publication date
ES2116728T5 (en) 2003-04-01
FI111878B (en) 2003-09-30
WO1995021364A1 (en) 1995-08-10
PL178274B1 (en) 2000-03-31
PL315680A1 (en) 1996-11-25
DE59501914D1 (en) 1998-05-20
US5993703A (en) 1999-11-30
DE4403270C2 (en) 2000-02-24
EP0741854B1 (en) 1998-04-15
ZA95856B (en) 1996-02-20
FI963061A0 (en) 1996-08-02
FI963061A (en) 1996-10-01
CZ228696A3 (en) 1997-03-12
EP0741854A1 (en) 1996-11-13
CZ284816B6 (en) 1999-03-17
ES2116728T3 (en) 1998-07-16
DE4403270C1 (en) 1995-05-04

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