EP1332813A2 - Refractory nozzle for a metallurgical vessel - Google Patents
Refractory nozzle for a metallurgical vessel Download PDFInfo
- Publication number
- EP1332813A2 EP1332813A2 EP02027793A EP02027793A EP1332813A2 EP 1332813 A2 EP1332813 A2 EP 1332813A2 EP 02027793 A EP02027793 A EP 02027793A EP 02027793 A EP02027793 A EP 02027793A EP 1332813 A2 EP1332813 A2 EP 1332813A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- heater
- steel
- refractory
- thermally insulating
- spout
- 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
Links
Images
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
- B22D41/50—Pouring-nozzles
-
- 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
- B22D41/50—Pouring-nozzles
- B22D41/60—Pouring-nozzles with heating or cooling means
Definitions
- the invention relates to a refractory spout for a metallurgical vessel, in particular for Melting steel, with a through opening having an upper and a lower end and an inner wall enclosing the passage opening on the side.
- Such spouts are widely known in metallurgy (DE 195 26 970 A1, DE 196 18 605 A1, DE 196 51 533 A1, DE 196 51 534 A1, EP 379 647 A2).
- a problem with these spouts it is that when the hot molten metal comes in, thermal stresses can be destroyed or that metal on the inner wall of the spouts is deposited.
- the spouts are usually preheated. Gas burners or induction heaters are used for this. For example with gas burners it is necessary that the preheating phase before the melt flows into the Spout is stopped to remove the burner from the flow area in time can. During this time, however, the spout cools down, so that the mentioned Problems cannot be completely eliminated.
- the invention is based, to improve the known spouts and the task To design preheating in such a way that destruction due to thermal tension or freezing metal melt on the inner wall of the spout can be largely avoided.
- thermal insulating material cardboard or a material with a melting point below the Melting point of steel is. Such material may cause it to freeze Metal melt after dissolving or melting the material with the melt flow the spout is rinsed out and does not clog it.
- thermal insulating material is fibrous or formed by spraying.
- the heater is expediently made of steel. Even metals with a lower one Melting point as steel may be suitable. When the spout is used for molten steel the heater dissolves as it passes through the melt, so that can flow freely through the spout. Possibly freezing on the heater first Material is dissolved again and rinsed out of the spout.
- the heating and / or the thermally insulating material by at least two extending in the longitudinal direction of the passage opening, side by side in the circumferential direction arranged parts is formed, since such an arrangement is easier can be made. It makes sense that the two parts are designed to be uniform to simplify manufacturing. The parts should touch each other or mechanical (or electrical) contact with each other.
- a heater 2 is arranged in the passage opening 1 of the spout.
- the heater has one two-part (see Fig. 2) meandering structure. It is in the spout by means of holding elements 3 hung. These holding elements 3 lie on the upper edge of the spout.
- the stoker 2 is made of steel. The preheating phase can extend in time due to its arrangement until the molten metal runs through the spout. When using the spout for molten steel, the heater 2 can be opened and flushed out of the spout.
- the heater has 2 electrical contacts 4, of which in only one is shown for the sake of simplicity.
- the second contact makes sense arranged at the corresponding end of the second part of the heater 2.
- the division into two the heater 2 can be seen in Fig. 2.
- the two parts of the heater 2 are at the contact point 5 mechanically and electrically connected to each other.
- the inner wall 6 of the spout is formed from zirconium dioxide.
- the electrodes 7 are called electrical Contacts 9 led to the outside.
- the spout has an outer housing 10 made of steel on the at its upper end of a sintered ring 11 made of ceramic material is limited.
- This insulating material 12 and the sintered ring 11 are formed from zirconium dioxide mullite.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Furnace Charging Or Discharging (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Description
Die Erfindung betrifft einen feuerfester Ausguss für ein metallurgisches Gefäß, insbesondere für Stahlschmelzen, mit einer ein oberes und ein unteres Ende aufweisenden Durchlauföffnung und einer die Durchlauföffnung seitlich umschließenden Innenwand.The invention relates to a refractory spout for a metallurgical vessel, in particular for Melting steel, with a through opening having an upper and a lower end and an inner wall enclosing the passage opening on the side.
Derartige Ausgüsse sind in der Metallurgie vielfältig bekannt (DE 195 26 970 A1, DE 196 18 605 A1, DE 196 51 533 A1, DE 196 51 534 A1, EP 379 647 A2). Ein Problem bei diesen Ausgüssen ist es, dass sie beim Einlaufen der heißen Metallschmelze durch die entstehenden thermischen Spannungen zerstört werden können oder dass Metall an der Innenwand der Ausgüsse abgeschieden wird. Um dies zu verhindern, werden die Ausgüsse üblicherweise vorgeheizt. Hierzu werden Gasbrenner oder Induktionsheizungen benutzt. Beispielsweise bei Gasbrennern ist es erforderlich, dass die Vorwärmphase vor dem Einfließen der Schmelze in den Ausguss beendet wird, um den Brenner rechtzeitig aus dem Durchflussbereich entfernen zu können. Während dieser Zwischenzeit kühlt der Ausguss jedoch ab, so dass die genannten Probleme nicht vollständig beseitigt werden können.Such spouts are widely known in metallurgy (DE 195 26 970 A1, DE 196 18 605 A1, DE 196 51 533 A1, DE 196 51 534 A1, EP 379 647 A2). A problem with these spouts it is that when the hot molten metal comes in, thermal stresses can be destroyed or that metal on the inner wall of the spouts is deposited. To prevent this, the spouts are usually preheated. Gas burners or induction heaters are used for this. For example with gas burners it is necessary that the preheating phase before the melt flows into the Spout is stopped to remove the burner from the flow area in time can. During this time, however, the spout cools down, so that the mentioned Problems cannot be completely eliminated.
Der Erfindung liegt die Aufgabe zugrunde, die bekannten Ausgüsse zu verbessern und das Vorheizen so zu gestalten, dass Zerstörungen durch thermische Spannungen oder das Anfrieren von Metallschmelze an der Innenwand des Ausgusses weitgehend vermieden werden.The invention is based, to improve the known spouts and the task To design preheating in such a way that destruction due to thermal tension or freezing metal melt on the inner wall of the spout can be largely avoided.
Die Aufgabe wird erfindungsgemäß dadurch gelöst, dass in der Durchlauföffnung entlang der Innenwand entweder ein Heizer oder ein thermisch isolierendes, sich bei Berührung mit flüssigem Stahl auflösendes oder verbrennendes Material oder eine Kombination daraus angeordnet ist. Dadurch wird ein relativ langsamer Temperaturanstieg des Materials des Ausgusses beim Einlaufen der Metallschmelze erreicht. Thermische Spannungen werden verringert und ein zu rasches Abkühlen und Anfrieren der mit der Innenwand in Berührung kommenden Metallschmelze wird weitgehend vermieden. Als zweckmäßig hat es sich erwiesen, dass das thermisch isolierende Material Pappe oder ein Material mit einem Schmelzpunkt, der unterhalb des Schmelzpunktes von Stahl liegt, ist. Ein solches Material bewirkt, dass eventuell an ihm anfrierende Metallschmelze nach Auflösen bzw. Schmelzen des Materials mit dem Schmelzfluss aus dem Ausguss herausgespült wird und ihn nicht zusetzt. Vorteilhafter weise ist das thermisch isolierende Material faserartig oder durch Aufsprühen ausgebildet.The object is achieved in that in the passage opening along the Inner wall either a heater or a thermally insulating, when in contact with liquid Steel dissolving or burning material or a combination thereof is. This will cause a relatively slow rise in the temperature of the spout material Shrinkage of the molten metal reached. Thermal stresses are reduced and one too rapid cooling and freezing of the molten metal coming into contact with the inner wall is largely avoided. It has proven to be expedient that the thermal insulating material cardboard or a material with a melting point below the Melting point of steel is. Such material may cause it to freeze Metal melt after dissolving or melting the material with the melt flow the spout is rinsed out and does not clog it. This is advantageously thermal insulating material is fibrous or formed by spraying.
Der Heizer ist zweckmäßigerweise aus einem Stahl gebildet. Auch Metalle mit einem niedrigeren Schmelzpunkt als Stahl können geeignet sein. Wenn der Ausguss für Stahlschmelzen eingesetzt wird, löst sich der Heizer während des Durchlaufens der Schmelze auf, so dass diese ungehindert durch den Ausguss fließen kann. Eventuell an dem Heizer zunächst anfrierendes Material wird wieder aufgelöst und aus dem Ausguss herausgespült.The heater is expediently made of steel. Even metals with a lower one Melting point as steel may be suitable. When the spout is used for molten steel the heater dissolves as it passes through the melt, so that can flow freely through the spout. Possibly freezing on the heater first Material is dissolved again and rinsed out of the spout.
Vorteilhaft ist es, dass der Heizen und/oder das thermisch isolierende Material durch mindestens zwei sich in Längsrichtung der Durchlauföffnung erstreckende, in Umfangsrichtung nebeneinander angeordnete Teile gebildet ist, da sich eine derart ausgebildete Anordnung leichter herstellen lässt. Dabei ist es sinnvoll, dass die beiden Teile gleichförmig ausgebildet sind, um die Fertigung zu vereinfachen. Dabei sollten sich die Teile gegenseitig berühren bzw. mechanischen (oder elektrischen) Kontakt zu einander aufweisen.It is advantageous that the heating and / or the thermally insulating material by at least two extending in the longitudinal direction of the passage opening, side by side in the circumferential direction arranged parts is formed, since such an arrangement is easier can be made. It makes sense that the two parts are designed to be uniform to simplify manufacturing. The parts should touch each other or mechanical (or electrical) contact with each other.
Nachfolgende wird ein Ausführungsbeispiel der Erfindung an Hand einer Zeichnung näher erläutert.An exemplary embodiment of the invention is explained in more detail below with reference to a drawing.
In der Zeichnung zeigt:
In der Durchlauföffnung 1 des Ausgusses ist ein Heizer 2 angeordnet. Der Heizer weist eine
zweiteilige (s. Fig. 2) mäanderförmige Struktur auf. Er ist in den Ausguss mittels Halteelementen
3 eingehängt. Diese Halteelemente 3 liegen auf den oberen Rand des Ausgusses auf. Der Heizer
2 ist aus Stahl gebildet. Die Vorheizphase kann durch seine Anordnung zeitlich erstreckt
werden bis die Metallschmelze durch den Ausguss hindurch läuft. Beim Einsatz des Ausgusses
für Stahlschmelze läßt sich der Heizer 2 auf und wird aus dem Ausguss hinausgespült. A
Zu seinem elektrischen Anschluss weist der Heizer 2 elektrische Kontakte 4 auf, von denen in
der Zeichnung der Einfachheit halber nur einer gezeigt ist. Der zweite Kontakt ist sinnvollerweise
an dem entsprechenden Ende des zweiten Teiles der Heizung 2 angeordnet. Die Zweiteilung
der Heizung 2 ist in Fig. 2 erkennbar. Die beiden Teile der Heizung 2 sind an der Kontaktstelle 5
miteinander mechanisch und elektrisch verbunden.For its electrical connection, the heater has 2
Die Innenwand 6 des Ausgusses ist aus Zirkondioxid gebildet. An ihrer äußeren Oberfläche
sind Elektroden 7 angeordnet, wobei zwischen den Elektroden 7 und der Innenwand 6 des
Ausgusses eine Schicht 8 aus Chromdioxidpulver angeordnet ist, mittels derer der Kontakt zwischen
den Elektroden 7 und der Innenwand 6 hergestellt ist. Die Elektroden 7 werden als elektrische
Kontakte 9 nach außen geführt.The
Der Ausguss weist ein äußeres Gehäuse 10 aus Stahl auf das an seinem oberen Ende von
einem Sinterring 11 aus keramischem Material begrenzt wird.The spout has an
Der verbleibende Raum innerhalb des Gehäuses 10 wird von einem isolierenden Material 12
ausgefüllt. Dieses isolierende Material 12 und der Sinterring 11 sind aus Zirkondioxid-Mullit gebildet.The remaining space within the
Claims (7)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10204305 | 2002-02-01 | ||
DE10204305A DE10204305B4 (en) | 2002-02-01 | 2002-02-01 | Refractory spout for a metallurgical vessel |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1332813A2 true EP1332813A2 (en) | 2003-08-06 |
EP1332813A3 EP1332813A3 (en) | 2003-11-26 |
EP1332813B1 EP1332813B1 (en) | 2008-01-30 |
Family
ID=7713610
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02027793A Expired - Lifetime EP1332813B1 (en) | 2002-02-01 | 2002-12-12 | Refractory nozzle for a metallurgical vessel |
Country Status (10)
Country | Link |
---|---|
US (1) | US6832707B2 (en) |
EP (1) | EP1332813B1 (en) |
JP (1) | JP4316897B2 (en) |
KR (1) | KR100870162B1 (en) |
CN (1) | CN1286601C (en) |
AT (1) | ATE385208T1 (en) |
BR (1) | BR0300169B1 (en) |
CA (1) | CA2413492C (en) |
DE (2) | DE10204305B4 (en) |
ES (1) | ES2296871T3 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1275452A3 (en) * | 2001-07-13 | 2003-12-10 | Heraeus Electro-Nite International N.V. | Refractory nozzle |
DE102007034426B3 (en) * | 2007-07-20 | 2008-12-04 | HAGENBURGER Feuerfeste Produkte für Gießereien und Stahlwerke KG | Component of a casting system through which a molten metal can flow |
MX2016012571A (en) * | 2014-05-05 | 2016-12-14 | Refractory Intellectual Property Gmbh & Co Kg | Refractory ceramic casting nozzle. |
KR101951805B1 (en) * | 2017-05-12 | 2019-02-25 | 손인철 | Melt discharging device |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3435992A (en) * | 1966-03-11 | 1969-04-01 | Tisdale Co Inc | Pouring nozzle for continuous casting liquid metal or ordinary steel |
JPS546816A (en) * | 1977-06-20 | 1979-01-19 | Kobe Steel Ltd | Prevention of pouriggnozzle blockade |
EP0407786A1 (en) * | 1989-07-10 | 1991-01-16 | General Electric Company | Transfer tube with insitu heater |
JPH05337635A (en) * | 1992-06-05 | 1993-12-21 | Aichi Steel Works Ltd | Molten metal holding vessel |
DE19526970A1 (en) * | 1995-07-25 | 1997-01-30 | Didier Werke Ag | Method and device for inductively heating a refractory molded part |
DE19603317A1 (en) * | 1995-08-28 | 1997-03-06 | Didier Werke Ag | Method for operating an inductor and inductor for carrying out the method |
DE19603607A1 (en) * | 1995-10-05 | 1997-04-10 | Didier Werke Ag | Multi-region inductor unit |
DE10132575C1 (en) * | 2001-07-10 | 2002-07-04 | Heraeus Electro Nite Int | Refractory outlet used in the wall of a metallurgical vessel for steel melts has electrodes made from metal having a high melting point and/or formed from one of its oxides |
DE10160070A1 (en) * | 2001-12-06 | 2003-06-18 | Sms Demag Ag | Outlet used for steel melts comprises a casing arranged on outer surfaces enclosing an insulating material, and flow channels for the melt facing the insulating material |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE830039A (en) * | 1975-06-09 | 1975-10-01 | IMPROVEMENTS TO CASTING BUSETTES | |
DE3903210C1 (en) * | 1989-01-31 | 1990-06-28 | Mannesmann Ag, 4000 Duesseldorf, De | |
JPH05337645A (en) * | 1992-06-08 | 1993-12-21 | Ishikawajima Harima Heavy Ind Co Ltd | Welding arc oscillating method |
US5902509A (en) * | 1995-07-25 | 1999-05-11 | Dider-Werke Ag | Method and apparatus for inductively heating a refractory shaped member |
-
2002
- 2002-02-01 DE DE10204305A patent/DE10204305B4/en not_active Expired - Fee Related
- 2002-12-03 CA CA002413492A patent/CA2413492C/en not_active Expired - Fee Related
- 2002-12-12 DE DE50211632T patent/DE50211632D1/en not_active Expired - Lifetime
- 2002-12-12 ES ES02027793T patent/ES2296871T3/en not_active Expired - Lifetime
- 2002-12-12 EP EP02027793A patent/EP1332813B1/en not_active Expired - Lifetime
- 2002-12-12 AT AT02027793T patent/ATE385208T1/en active
-
2003
- 2003-01-03 CN CNB031001564A patent/CN1286601C/en not_active Expired - Fee Related
- 2003-01-17 KR KR1020030003185A patent/KR100870162B1/en not_active IP Right Cessation
- 2003-01-20 JP JP2003010827A patent/JP4316897B2/en not_active Expired - Fee Related
- 2003-01-30 BR BRPI0300169-5A patent/BR0300169B1/en not_active IP Right Cessation
- 2003-01-31 US US10/355,712 patent/US6832707B2/en not_active Expired - Fee Related
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3435992A (en) * | 1966-03-11 | 1969-04-01 | Tisdale Co Inc | Pouring nozzle for continuous casting liquid metal or ordinary steel |
JPS546816A (en) * | 1977-06-20 | 1979-01-19 | Kobe Steel Ltd | Prevention of pouriggnozzle blockade |
EP0407786A1 (en) * | 1989-07-10 | 1991-01-16 | General Electric Company | Transfer tube with insitu heater |
JPH05337635A (en) * | 1992-06-05 | 1993-12-21 | Aichi Steel Works Ltd | Molten metal holding vessel |
DE19526970A1 (en) * | 1995-07-25 | 1997-01-30 | Didier Werke Ag | Method and device for inductively heating a refractory molded part |
DE19603317A1 (en) * | 1995-08-28 | 1997-03-06 | Didier Werke Ag | Method for operating an inductor and inductor for carrying out the method |
DE19603607A1 (en) * | 1995-10-05 | 1997-04-10 | Didier Werke Ag | Multi-region inductor unit |
DE10132575C1 (en) * | 2001-07-10 | 2002-07-04 | Heraeus Electro Nite Int | Refractory outlet used in the wall of a metallurgical vessel for steel melts has electrodes made from metal having a high melting point and/or formed from one of its oxides |
DE10160070A1 (en) * | 2001-12-06 | 2003-06-18 | Sms Demag Ag | Outlet used for steel melts comprises a casing arranged on outer surfaces enclosing an insulating material, and flow channels for the melt facing the insulating material |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 018, no. 168 (M-1580), 22. März 1994 (1994-03-22) & JP 05 337635 A (AICHI STEEL WORKS LTD;OTHERS: 01), 21. Dezember 1993 (1993-12-21) * |
Also Published As
Publication number | Publication date |
---|---|
ATE385208T1 (en) | 2008-02-15 |
US20030146553A1 (en) | 2003-08-07 |
ES2296871T3 (en) | 2008-05-01 |
BR0300169A (en) | 2003-09-09 |
EP1332813A3 (en) | 2003-11-26 |
KR20030066342A (en) | 2003-08-09 |
CA2413492A1 (en) | 2003-08-01 |
DE50211632D1 (en) | 2008-03-20 |
CA2413492C (en) | 2009-09-29 |
US6832707B2 (en) | 2004-12-21 |
CN1286601C (en) | 2006-11-29 |
DE10204305A1 (en) | 2003-08-21 |
JP4316897B2 (en) | 2009-08-19 |
CN1435288A (en) | 2003-08-13 |
JP2003245772A (en) | 2003-09-02 |
EP1332813B1 (en) | 2008-01-30 |
KR100870162B1 (en) | 2008-11-25 |
BR0300169B1 (en) | 2011-11-16 |
DE10204305B4 (en) | 2004-04-29 |
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