EP0729800B1 - Method of repairing the refractory lining of a steel ladle - Google Patents
Method of repairing the refractory lining of a steel ladle Download PDFInfo
- Publication number
- EP0729800B1 EP0729800B1 EP96101806A EP96101806A EP0729800B1 EP 0729800 B1 EP0729800 B1 EP 0729800B1 EP 96101806 A EP96101806 A EP 96101806A EP 96101806 A EP96101806 A EP 96101806A EP 0729800 B1 EP0729800 B1 EP 0729800B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lining
- permanent
- refractory
- wear
- pan
- 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.)
- Expired - Lifetime
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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
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/02—Linings
Definitions
- the invention relates to a method for restoring the refractory lining of a pan for liquid steel.
- pans which consist of a Steel tanks with an inner refractory lining.
- This refractory lining is subject to, especially in the upper Field of slag formation, a chemical and mechanical Wear, so the pan delivery from time to time Time needs to be renewed.
- the refractory delivery Because the pans fall below a certain minimum thickness the refractory delivery for security reasons not may be used more, but still not one there is insignificant residual layer thickness of the feed the refractory delivery is built up in two layers, that a so-called Permanent food is arranged, which is the inside actual wear lining connects.
- the permanent feed used according to the state of the art exists made of refractory plates, which are about 20 mm thick and to avoid stuck on top of each other offset by continuous joints become.
- DE OS 29 14 686 describes a method and a device described for removing used refractory lining, at least one by means of a cutting device extending continuously along the entire vessel wall Slit made in the feed to be removed to the compressive stresses prevailing in the feed exploit to finally facilitate the removal of the feed.
- a division into a permanent lining and a wear lining is not scheduled.
- the feed must be power tools are broken open.
- the invention is based on the object On the one hand to remove used refractory lining, on the other hand also the application of a new one Simplify wear chuck considerably.
- the permanent lining is monolithic using a formwork template manufacture.
- prefabricated refractory molded parts as they have been used so far become.
- the previously required gluing of the individual refractory plates on the inner pan wall are required.
- the permanent feed applied according to the invention is with the help of Anchor elements arranged on the inner pan wall are firmly connected to it, so that overall the dimensional stability the pan or the permanent feed is raised.
- the layer thickness of the permanent lining is preferably between 60 and 150 mm, is therefore essential compared to the prior art elevated. For this reason, the rest is to be processed Layer of the wear lining relatively thin, so that the amount of residues to be disposed of is also comparatively is low.
- the anchor elements already mentioned are preferably dovetail-shaped trained and are, for example with the well-known stud welding process on the inner pan wall welded. These anchor elements ensure excellent Attachment of the permanent feed and an increase in stability the pan. It is with the refractory lining according to the invention possible between the inner pan wall and to provide a fiber insulation material for the actual permanent feed, which is a significant improvement in the insulation effect has the consequence that the outside temperature of the pan of usual approx. 300 ° C to approx. 200 ° C.
- the fiber insulation mats can in a known manner on the inner surface of the Socket wall between the anchor elements are glued, the anchor elements with the integrated bases of the cast Refractory a compression of the fiber mats prevent.
- the refractory material used for the permanent feed can Contain steel needles, for example, in an amount of approx. 1% can be added. Through this internal reinforcement z. B. thermal stresses are more easily absorbed or reduced, so that the susceptibility to tearing of the feed decreases.
- the wear lining to be applied to the permanent lining exists usually from a spinel-forming casting compound, see above that it is advantageous to the permanent feed before applying the Dry the lining so that the spinel-forming Masses not caused by additional water vapor from the permanent feed can be hydrated.
- the casting compounds used for the permanent and wear lining are preferably set thixotropically, so that they with With the help of well-known pumping and distribution systems in the Gap between the pan wall and the formwork template can be introduced.
- the drawing figure shows a vertical section through a Steel pan 1 with a refractory delivery 2.
- the refractory delivery 2 consists of a wear lining 3, which the Melt is facing and a permanent feed 4 that is the inner pan wall 5 connects.
- the permanent feed 4 is on the pan wall 5 with the help of dovetail anchors 6 attached.
- the permanent lining 4 with the help of the dovetail anchor 6 or them surrounding base 12 supports against the pan wall 5.
Description
Die Erfindung betrifft ein Verfahren zur Wiederherstellung der feuerfesten Auskleidung einer Pfanne für flüssigen Stahl.The invention relates to a method for restoring the refractory lining of a pan for liquid steel.
Bei der Herstellung von Stahl wird die erzeugte Stahlschmelze zum Transport, aber auch zur Durchführung metallurgischer Arbeiten wie Legierungseinstellung, Entschwefelung und dergleichen, in sogenannte Pfannen eingefüllt, die aus einem Stahlbehälter mit einer inneren Feuerfestauskleidung bestehen. Diese Feuerfestauskleidung unterliegt, besonders im oberen Bereich der Schlackenbildung, einem chemischen und mechanischen Verschleiß, so daß die Pfannenzustellung von Zeit zu Zeit erneuert werden muß.In the production of steel, the steel melt produced for transport, but also for carrying out metallurgical Work such as alloy adjustment, desulfurization and the like, filled into so-called pans, which consist of a Steel tanks with an inner refractory lining. This refractory lining is subject to, especially in the upper Field of slag formation, a chemical and mechanical Wear, so the pan delivery from time to time Time needs to be renewed.
Während früher die Feuerfestauskleidung hauptsächlich aus gemauerten Feuerfeststeinen bestand, ist man in jüngster Zeit mehr und mehr dazu übergegangen, die Feuerfestauskleidung aus vergossenen und verdichteten Feuerfestmassen herzustellen. Dazu wird in den Innenraum der Pfanne eine sich in der Regel nach unten verjüngende Pfannenschablone derart eingesetzt, daß zwischen der inneren Pfannenwandung und der Schablone ein Spalt entsteht, der der gewünschten Dicke der späteren Feuerfestzustellung entspricht und in dem eine Gießmasse eingefüllt wird. Diese wird durch z. B. Vibration verdichtet und anschließend getrocknet bzw. gebrannt.While the refractory lining used to be mostly masonry refractory bricks, one is in recent times more and more went over to the refractory lining to produce cast and compacted refractory materials. This is usually done in the interior of the pan downward tapering pan template used so that between the inner pan wall and the template Gap arises, the desired thickness of the later refractory delivery corresponds and in which a casting compound is poured becomes. This is by z. B. Vibration compacted and then dried or burned.
Da die Pfannen beim Unterschreiten einer bestimmten Mindestdicke der Feuerfestzustellung aus Sicherheitsgründen nicht mehr verwendet werden dürfen, jedoch nach wie vor eine nicht unerhebliche Restschichtstärke des Futters vorhanden ist, hat man die Feuerfestzustellung zweischichtig derart aufgebaut, daß unmittelbar auf der Pfannenwandung zunächst ein sogenanntes Dauerfutter angeordnet ist, dem sich das innenliegende eigentliche Verschleißfutter anschließt.Because the pans fall below a certain minimum thickness the refractory delivery for security reasons not may be used more, but still not one there is insignificant residual layer thickness of the feed the refractory delivery is built up in two layers, that a so-called Permanent food is arranged, which is the inside actual wear lining connects.
Dadurch muß bei der Neuzustellung der Pfanne lediglich das restliche Verschleißfutter entfernt werden.This means that only when you reload the pan remaining wear lining can be removed.
Das nach dem Stand der Technik verwendete Dauerfutter besteht aus Feuerfestplatten, die etwa 20 mm dick sind und zur Vermeidung von durchgehenden Fugen versetzt übereinander aufgeklebt werden.The permanent feed used according to the state of the art exists made of refractory plates, which are about 20 mm thick and to avoid stuck on top of each other offset by continuous joints become.
Bei einschichtig aufgebauten Feuerfestauskleidungen ist, beispielsweise aus der europäischen Patentschrift 0 514 383, ein Verfahren bekanntgeworden, wonach die verbleibende Auskleidung durch mechanische Bearbeitung teilweise abgetragen bzw. aufgerauht wird, bevor eine Neuzustellung der Pfanne erfolgt. Diese mechanische Bearbeitung der monolithischen Zustellung ist jedoch vergleichsweise aufwendig, außerdem besteht die Gefahr, daß sich im verbleibenden Restfutter Risse bilden.In the case of single-layer refractory linings, for example from European patent 0 514 383 Process became known, after which the remaining lining partially removed or roughened by mechanical processing before the pan is relined. This mechanical processing of the monolithic infeed is however comparatively complex, there is also the risk that cracks form in the remaining feed.
Aus Stahl und Eisen, BD. 110, Nr. 11, 1. November 1990 ist es bekannt, ein monolithisches Dauerfutter mit Hilfe von Schwalbenschwanzankern an der Innenwandung eines Verteilers mit Hilfe einer Gießschablone zu erzeugen. Dieses Dauerfutter wird nach einer Abarbeitung bis auf eine Reststärke entweder durch sogenanntes Endless-lining teilweise oder völlig entfernt und neu zugestellt.Made of steel and iron, BD. 110, No. 11, November 1, 1990 it is known, a monolithic permanent lining with the help of dovetail anchors on the inner wall of a distributor To create using a casting template. This permanent feed will after processing to a residual thickness either by so-called endless lining partially or completely removed and newly delivered.
Aus der DE OS 29 14 686 sind ein Verfahren und eine Vorrichtung zum Entfernen von verbrauchtem Feuerfestfutter beschrieben, bei dem mittels einer Schneidvorrichtung zumindest ein sich längs der gesamten Gefäßwandung erstreckender ununterbrochener Schlitz in das zu entfernende Futter angebracht wird, um die in dem Futter vorherrschenden Druckspannungen auszunutzen, um schließlich das Entfernen des Futters zu erleichtern. Eine Teilung in ein Dauerfutter und in ein Verschleißfutter ist nicht vorgesehen. Das Futter muß mittels kraftbetriebener Werkzeuge aufgebrochen werden.DE OS 29 14 686 describes a method and a device described for removing used refractory lining, at least one by means of a cutting device extending continuously along the entire vessel wall Slit made in the feed to be removed to the compressive stresses prevailing in the feed exploit to finally facilitate the removal of the feed. A division into a permanent lining and a wear lining is not scheduled. The feed must be power tools are broken open.
Dem gegenüber liegt der Erfindung die Aufgabe zugrunde, das Entfernen von verbrauchtem Feuerfestfutter einerseits zu erleichtern, andererseits aber auch das Aufbringen eines neuen Verschleißfutters wesentlich zu vereinfachen.In contrast, the invention is based on the object On the one hand to remove used refractory lining, on the other hand also the application of a new one Simplify wear chuck considerably.
Die Aufgabe wird gelöst durch die Merkmale des Patentanspruchs
1.The object is achieved by the features of the
Bei dem erfindungsgemäßen Verfahren ist es zunächst möglich, das Dauerfutter mit Hilfe einer Schalungsschablone monolithisch herzustellen. Dadurch kann auf vorgefertigte Feuerfestformteile, wie sie bisher verwendet wurden, verzichtet werden. Auch entfällt das vorher erforderliche Aufkleben der einzelnen Feuerfestplatten auf die innere Pfannenwandung.In the method according to the invention, it is first possible the permanent lining is monolithic using a formwork template manufacture. As a result, prefabricated refractory molded parts, as they have been used so far become. Also, the previously required gluing of the individual refractory plates on the inner pan wall.
Das erfindungsgemäß aufgebrachte Dauerfutter ist mit Hilfe von Ankerelementen, die an der inneren Pfannenwandung angeordnet sind, fest mit dieser verbunden, so daß insgesamt die Formstabilität der Pfanne bzw. des Dauerfutters erhöht ist.The permanent feed applied according to the invention is with the help of Anchor elements arranged on the inner pan wall are firmly connected to it, so that overall the dimensional stability the pan or the permanent feed is raised.
Die Schichtdicke des Dauerfutters liegt vorzugsweise zwischen 60 und 150 mm, ist also gegenüber dem Stand der Technik wesentlich erhöht. Aus diesem Grunde ist die restliche abzuarbeitende Schicht des Verschleißfutters relativ dünn, so daß die Menge der zu entsorgenden Reststoffe ebenfalls vergleichsweise gering ist.The layer thickness of the permanent lining is preferably between 60 and 150 mm, is therefore essential compared to the prior art elevated. For this reason, the rest is to be processed Layer of the wear lining relatively thin, so that the amount of residues to be disposed of is also comparatively is low.
Nach dem erfindungsgemäßen Verfahren ist vorgesehen, daß das restliche Verschleißfutter mit Hilfe eines Meißels bis zur Fuge zwischen dem Dauerfutter und dem restlichen Verschleißfutter linienförmig von oben nach unten aufgeschlitzt werden kann, so daß sich je nach Anzahl der Schlitze zwei oder mehrere kreissegmentartige Verschleißfutterbereiche ergeben, die, durch Kippen der Pfanne, bequem vom Dauerfutter gelöst werden können.According to the method according to the invention it is provided that remaining wear lining with the help of a Chisel to the joint between the permanent feed and the rest Wear lining slit in a line from top to bottom can be, so that depending on the number of slots two or more circular segment-like wear lining areas result, which, by tilting the pan, is convenient can be detached from the permanent feed.
Auf diese Weise ist eine Neuzustellung des Verschleißfutters in wesentlich kürzerer Zeit möglich als bei den bisher bekannten Feuerfestauskleidungen.In this way, the lining is relined possible in a much shorter time than with the previously known Refractory linings.
Erfahrungsgemäß zeigen die Stahlpfannen in vertikaler Richtung ein unterschiedliches Verschleißverhalten derart, daß der Verschleiß im oberen Pfannenbereich wesentlich erhöht ist. Dies liegt zum einen an der höheren Badtemperatur im oberen Schmelzenbereich, zum anderen schwimmt auf der Stahlschmelze eine chemisch sehr aggressive Schlacke auf, die das Futter in diesem Bereich sehr intensiv angreift. Demzufolge ist es vorteilhaft, die Schichtdicke des Dauerfutters im unteren Pfannenbereich zu erhöhen, so daß durch diese Maßnahme die zu entfernende restliche Verschleißfutterschicht überall relativ dünn ist.Experience has shown that the steel pans point in the vertical direction a different wear behavior such that the Wear in the upper pan area is significantly increased. On the one hand, this is due to the higher bath temperature in the upper one Melting area, on the other hand floats on the molten steel a chemically very aggressive slag, which the feed in attacks this area very intensely. As a result, it is advantageous the layer thickness of the permanent lining in the lower pan area to increase, so that the measure Removing remaining wear lining layer relative everywhere is thin.
Die bereits erwähnten Ankerelemente sind vorzugsweise schwalbenschwanzförmig ausgebildet und werden, beispielsweise mit dem bekannten Bolzenschweißverfahren, an der inneren Pfannenwandung verschweißt. Diese Ankerelemente sorgen für eine hervorragende Befestigung des Dauerfutters und eine Stabilitätserhöhung der Pfanne. Es ist bei der erfindungsgemäßen Feuerfestauskleidung möglich, zwischen der inneren Pfannenwandung und dem eigentlichen Dauerfutter einen Faserdämmstoff vorzusehen, der eine deutliche Verbesserung der Isolationswirkung zur Folge hat, so daß die Außentemperatur der Pfanne von üblicherweise ca. 300 °C auf etwa 200 °C sinkt. Die Faserdämmstoffmatten können in bekannter Weise auf die Innenfläche der Pfannenwandung zwischen den Ankerelementen aufgeklebt werden, wobei die Ankerelemente mit den integrierten Sockeln des gegossenen Feuerfestmaterials ein Zusammendrücken der Fasermatten verhindern.The anchor elements already mentioned are preferably dovetail-shaped trained and are, for example with the well-known stud welding process on the inner pan wall welded. These anchor elements ensure excellent Attachment of the permanent feed and an increase in stability the pan. It is with the refractory lining according to the invention possible between the inner pan wall and to provide a fiber insulation material for the actual permanent feed, which is a significant improvement in the insulation effect has the consequence that the outside temperature of the pan of usual approx. 300 ° C to approx. 200 ° C. The fiber insulation mats can in a known manner on the inner surface of the Socket wall between the anchor elements are glued, the anchor elements with the integrated bases of the cast Refractory a compression of the fiber mats prevent.
Dies war bei den bisherigen Feuerfestauskleidungen nicht möglich, da die Faserdämmstoffmatten durch den Druck des eigentlichen Futters zusammengepreßt und zerstört wurden.This was not possible with the previous refractory linings, because the fiber insulation mats by the pressure of the actual Feed pressed together and destroyed.
Das für das Dauerfutter verwendete Feuerfestmaterial kann Stahlnadeln enthalten, die beispielsweise in einer Menge von ca. 1 % zugemischt werden. Durch diese innere Bewehrung können z. B. Wärmespannungen leichter aufgefangen bzw. abgebaut werden, so daß die Rißanfälligkeit des Futters sinkt.The refractory material used for the permanent feed can Contain steel needles, for example, in an amount of approx. 1% can be added. Through this internal reinforcement z. B. thermal stresses are more easily absorbed or reduced, so that the susceptibility to tearing of the feed decreases.
Das auf das Dauerfutter aufzubringende Verschleißfutter besteht üblicherweise aus einer Spinell-bildenden Gießmasse, so daß es vorteilhaft ist, das Dauerfutter vor dem Aufbringen des Verschleißfutters zu trocknen, damit die Spinell-bildenden Massen nicht durch zusätzlichen Wasserdampf des Dauerfutters hydratisiert werden können.The wear lining to be applied to the permanent lining exists usually from a spinel-forming casting compound, see above that it is advantageous to the permanent feed before applying the Dry the lining so that the spinel-forming Masses not caused by additional water vapor from the permanent feed can be hydrated.
Die für das Dauer- und das Verschleißfutter verwendeten Gießmassen sind vorzugsweise thixotrop eingestellt, so daß sie mit Hilfe bekannter Pump- und Verteilungssysteme problemlos in den Spalt zwischen der Pfannenwandung und der Schalungsschablone eingebracht werden können.The casting compounds used for the permanent and wear lining are preferably set thixotropically, so that they with With the help of well-known pumping and distribution systems in the Gap between the pan wall and the formwork template can be introduced.
Die Erfindung ist in der Zeichnung beispielsweise veranschaulicht und wird im nachfolgenden anhand der Zeichnung im einzelnen erläutert.The invention is illustrated in the drawing, for example and is in the following with reference to the drawing in detail explained.
Die Zeichnungsfigur zeigt einen vertikalen Schnitt durch eine
Stahlpfanne 1 mit einer Feuerfestzustellung 2. Die Feuerfestzustellung
2 besteht aus einem Verschleißfutter 3, das der
Schmelze zugewandt ist und einem Dauerfutter 4, das sich an
die innere Pfannenwandung 5 anschließt. Das Dauerfutter 4 ist
an der Pfannenwandung 5 mit Hilfe von Schwalbenschwanzankern
6 befestigt.The drawing figure shows a vertical section through a
Beim Abgießen der Pfannenzustellung 2 werden im Bodenbereich
7 der Pfanne Kerne eingesetzt, um entsprechende Freiräume bzw.
Freiflächen zum Einsetzen eines Gasspülsteins 8 bzw. eines
Gießlochsteins 9 zu schaffen. Beim dargestellten Ausführungsbeispiel
endet das Dauerfutter 4 kurz unterhalb der
Schlackenzone 10.When pouring the
Zwischen der inneren Pfannenwandung 5 und dem Dauerfutter 4
sind Faserdämmstoffmatten 11 vorgesehen, wobei sich das Dauerfutter
4 mit Hilfe der Schwalbenschwanzanker 6 bzw. der sie
umgebenden Sockel 12 gegen die Pfannenwandung 5 abstützt.Between the
Claims (1)
- Method of repairing the refractory lining of a ladle for liquid steel, wherein the lining comprises a permanent lining (4) which adjoins the inner container wall (5) and a wear lining (3) which adjoins the permanent lining by means of a joint, and the permanent lining comprises a monolithic refractory mass which is cast by means of a shuttering template and which is connected to the inner ladle wall (5) by means of anchor elements (6), wherein the worn-away wear lining, before the fresh application of a wear lining, is slit open by means of a chisel in a linear manner as far as the joint between the permanent lining and the remaining wear lining and the resulting segment-like wear lining regions are detached from the permanent lining by tilting the ladle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29503495U DE29503495U1 (en) | 1995-03-02 | 1995-03-02 | Refractory lining for steel pans |
| DE29503495U | 1995-03-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0729800A1 EP0729800A1 (en) | 1996-09-04 |
| EP0729800B1 true EP0729800B1 (en) | 2003-10-29 |
Family
ID=8004717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96101806A Expired - Lifetime EP0729800B1 (en) | 1995-03-02 | 1996-02-08 | Method of repairing the refractory lining of a steel ladle |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0729800B1 (en) |
| DE (2) | DE29503495U1 (en) |
| ES (1) | ES2211920T3 (en) |
| PT (1) | PT729800E (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102896308A (en) * | 2012-11-02 | 2013-01-30 | 河南海格尔高温材料有限公司 | Cold-state repair method for torpedo ladle impact area |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004511347A (en) | 2000-02-08 | 2004-04-15 | フォセコ・インターナショナル・リミテッド | Container for handling molten metal |
| DE102010016128B4 (en) | 2010-03-24 | 2017-08-24 | Calderys France S.A.S. | Refractory lining |
| CN103785820B (en) * | 2014-02-17 | 2016-02-10 | 莱芜钢铁集团有限公司 | A kind of ladle permanent liner and preparation method thereof |
| CN104759611B (en) * | 2015-04-22 | 2017-01-04 | 山东钢铁股份有限公司 | What a kind of ladle was combined working lining and slag lining thereof builds by laying method |
| BR102019024046A2 (en) * | 2019-11-14 | 2021-05-25 | Saint-Gobain do Brasil Produtos Industriais e para Construção Ltda. | method for coating steel pan bottoms |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4122642A (en) * | 1977-07-14 | 1978-10-31 | Plibrico (Canada) Limited | Refractory liner block |
| DE2914686A1 (en) * | 1979-04-11 | 1980-10-23 | Gerwin Holtmann | Removing worn refractory linings and/or slag deposits - from long vessels, esp. torpedo transporter:mixers for molten iron, where lining is cut, and then shattered by vibration |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57187162A (en) * | 1981-05-14 | 1982-11-17 | Nippon Kokan Kk <Nkk> | Bed applicating method for molten metal vessel |
| JPS5844960A (en) * | 1981-09-09 | 1983-03-16 | Nippon Puraiburiko Kk | Vessel for containing molten metal and its production |
| FR2619323B2 (en) * | 1987-04-03 | 1989-12-29 | Daussan & Co | METHOD AND INSTALLATION FOR PROJECTING A MULTILAYER INSULATING AND REFRACTORY COVERING AND COATING THUS OBTAINED |
| DE4003646C1 (en) * | 1990-02-07 | 1990-12-13 | Intocast Gmbh Feuerfestprodukte Und Giesshilfsmittel, 4030 Ratingen, De | |
| JPH04165291A (en) * | 1990-08-28 | 1992-06-11 | Kawasaki Steel Corp | Anchor structure for unshaped refractory lining material of melted iron, steel vessel |
-
1995
- 1995-03-02 DE DE29503495U patent/DE29503495U1/en not_active Expired - Lifetime
-
1996
- 1996-02-08 DE DE59610792T patent/DE59610792D1/en not_active Expired - Fee Related
- 1996-02-08 EP EP96101806A patent/EP0729800B1/en not_active Expired - Lifetime
- 1996-02-08 ES ES96101806T patent/ES2211920T3/en not_active Expired - Lifetime
- 1996-02-08 PT PT96101806T patent/PT729800E/en unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4122642A (en) * | 1977-07-14 | 1978-10-31 | Plibrico (Canada) Limited | Refractory liner block |
| DE2914686A1 (en) * | 1979-04-11 | 1980-10-23 | Gerwin Holtmann | Removing worn refractory linings and/or slag deposits - from long vessels, esp. torpedo transporter:mixers for molten iron, where lining is cut, and then shattered by vibration |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102896308A (en) * | 2012-11-02 | 2013-01-30 | 河南海格尔高温材料有限公司 | Cold-state repair method for torpedo ladle impact area |
| CN102896308B (en) * | 2012-11-02 | 2014-10-01 | 河南海格尔高温材料有限公司 | Cold-state repair method for torpedo ladle impact area |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2211920T3 (en) | 2004-07-16 |
| DE59610792D1 (en) | 2003-12-04 |
| PT729800E (en) | 2004-03-31 |
| DE29503495U1 (en) | 1995-04-13 |
| EP0729800A1 (en) | 1996-09-04 |
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