DE102009052279A1 - Carbon-containing refractory material for use in the casting of steel in the sub-casting process and moldings produced therefrom - Google Patents
Carbon-containing refractory material for use in the casting of steel in the sub-casting process and moldings produced therefrom Download PDFInfo
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Abstract
Dargestellt und beschrieben sind ein Feuerfestmaterial zur Auskleidung des Verteilungssystems einer Stahlschmelze beim Gießen von Stahl im Untergussverfahren und aus einem solchen Feuerfestmaterial hergestellte Formkörper. Um im Untergussverfahren nichtmetallische Einschlüsse im Stahl zuverlässig zu verhindern und zur Erhöhung der Stahlqualität wird vorgeschlagen, dass das Feuerfestmaterial mindestens stahlseitig kohlenstoffhaltige Komponenten enthält, mit diesen Komponenten gebunden ist und/oder beschichtet und/oder getränkt ist. Aus einem solchen Feuerfestmaterial hergestellte Formkörper können entweder als Hohlware stranggezogen oder trockengepresst kohlenstoffgebunden sein.Shown and described are a refractory material for lining the distribution system of a steel melt during the pouring of steel using the pouring method and molded bodies produced from such a refractory material. In order to reliably prevent non-metallic inclusions in the steel in the casting process and to increase the steel quality, it is proposed that the refractory material contain carbon-containing components at least on the steel side, be bonded with these components and / or coated and / or impregnated. Shaped bodies produced from such a refractory material can either be extruded as hollow goods or carbon-bonded in a dry-pressed manner.
Description
Die Erfindung betrifft ein Feuerfestmaterial zur Auskleidung des Verteilersystems einer Stahlschmelze beim Gießen von Stahl im Untergussverfahren sowie daraus hergestellte Formkörper. Es ist aus der Praxis bekannt, dass heute über 90% des weltweit produzierten Stahls im sogenannten Stranggussverfahren verfestigt werden, bei dem das flüssige Metall in eine beidseitig offene, wassergekühlte Kokille gegossen wird. An der unteren Öffnung der Kokille tritt das Metall als erstarrter Strang aus.The invention relates to a refractory material for lining the distribution system of a molten steel during the casting of steel in the sub-casting process and moldings produced therefrom. It is known from practice that today over 90% of the steel produced worldwide is solidified in the so-called continuous casting process, in which the liquid metal is poured into a water-cooled mold open on both sides. At the lower opening of the mold, the metal emerges as a solidified strand.
Daneben werden große Mengen Stahl auch in Blockkokillen gegossen, wenn eine Stahlsorte beispielsweise zu empfindlich auf die beim Strangguss auftretenden Biegespannungen bei hoher Temperatur reagiert oder wenn extreme Blockdicken für Schmiede- und Grobblechanwendungen gefordert sind. Dabei werden über ein feuerfestes keramisches stahlgefaßtes Rohrsystem über einen zentralen Einguß eine unterschiedliche Anzahl Kokillen bodenseitig von unten befüllt.In addition, large quantities of steel are also poured into block molds, if a steel grade, for example, reacts too sensitively to the bending stresses occurring during continuous casting at high temperature, or if extreme block thicknesses are required for forging and heavy plate applications. In this case, a different number of molds are filled on the bottom side of the bottom of a refractory ceramic stahlgefaßtes pipe system via a central sprue.
Hierbei handelt es sich um das an sich klassische Verfahren zum Vergießen von Stahl, kurz Untergussverfahren genannt. Das im Bereich der Verteilerstränge verwendete feuerfeste keramische Material wird aufgrund seiner röhrenförmigen Struktur kurz Hohlware genannt. Das Untergussverfahren erlebte in den letzten Jahren durch Entwicklung neuer Stahllegierungen und durch erhöhte Notwendigkeit endabmessungsnahen Gießens eine Renaissance.This is the classic method for casting steel, in short called submerged casting. Because of its tubular structure, the refractory ceramic material used in the area of the distributor strands is called hollowware for short. The sub-casting process has experienced a renaissance in recent years due to the development of new steel alloys and the increased need for near-net casting.
Die dazu verwendete Hohlware wurde und wird wegen der teilweise komplexen Geometrien der Bauteile vorwiegend im Strangziehverfahren in Form gebracht. Die für dieses Formgebungsverfahren notwendige Plastizität der Grünmasse wird regulär durch hohe Anteile an Ton und Wasser erreicht. Zusätzlich war traditionell der Grobkornanteil dieser Massen Schamotte, also vorgebrannter Ton, so dass insgesamt die Zusammensetzung der Hohlware meist den SiO2- reicheren Bereichen des Systems Al2O3- SiO2 zuzuordnen war. Inder Literatur sind zahlreiche Hinweise auf Wechselwirkungen zwischen Stahllegierungselementen (vorwiegend Mangan und Chrom) und Feuerfestbestandteilen (vorwiegend freies SiO2) zu finden. Aufgrund dieser Wechselwirkungen und der unvermeidbaren thermomechanischen Erosion gehen Partikel des Feuerfestmaterials in die. Stahlschmelze über, was in vielen Fällen zu nichtmetallischen Einschlüssen im finalen Gussstück führt und dessen Weiterverarbeitung verhindert oder zu fehlerhaften Stahlbauteilen mit schlechten mechanischen Eigenschaften führt. Dies ist insbesondere bei oft sehr großen Gussstücken mit erheblichen Mehrkosten verbunden.The hollowware used for this purpose was and is brought into shape mainly in the pultrusion because of the sometimes complex geometries of the components. The plasticity of the green mass necessary for this shaping process is regularly achieved by high proportions of clay and water. In addition, the coarse grain fraction of these masses was traditionally chamotte, ie prebaked clay, so that overall the composition of the hollowware was generally attributable to the SiO 2 -rich regions of the system Al 2 O 3 -SiO 2 . Numerous references to interactions between steel alloy elements (predominantly manganese and chromium) and refractory constituents (predominantly free SiO 2 ) can be found in the literature. Due to these interactions and the unavoidable thermomechanical erosion, particles of the refractory material enter the. Molten steel, which in many cases leads to non-metallic inclusions in the final casting and prevents its further processing or leads to faulty steel components with poor mechanical properties. This is associated with considerable extra costs, especially for very large castings.
Mit steigenden Qualitätsanforderungen auch an im Untergussverfahren vergossenem Stahl musste deshalb im Rahmen der Weiterentwicklung von Hohlware zunächst der Gehalt an freiem SiO2 möglichst reduziert werden. Das gelang durch
- – Einsatz eines Al2O3- reicheren Grobkorns (beispielsweise Sinterbauxit),
- – in den 1990er Jahren durch Herstellung bestimmter Formate im Halbtrockenverfahren an hydraulischen Pressen durch Reduzierung des Tonanteils und
- – durch Optimierung des Bindekonzepts in den vergangenen Jahren.
- Use of an Al 2 O 3 -rich coarse grain (for example sintered bauxite),
- - In the 1990s by producing certain formats in the semi-dry process on hydraulic presses by reducing the clay content and
- - by optimizing the binding concept in recent years.
Durch diese Maßnahmen konnte bereits die Gefahr durch nichtmetallische Einschlüsse (Lunker) im Stahlblock weitgehend minimiert werden. Als gebranntes keramisches Material verblieben für die Hohlware aber immer noch die Nachteile einer nur mäßigen Temperaturwechselbeständigkeit. Dies führt zur Rissbildung bei Gießbeginn und zum Ankleben der Keramik an den verbleibenden Metallresten (sog. „Gießknochen”) nach dem Gießen. Dadurch werden die Trennung und Wiederverwertung der Stahlteile erschwert.These measures have already minimized the risk of non-metallic inclusions (voids) in the steel block. As a fired ceramic material remained for the hollowware but still the disadvantages of only moderate thermal shock resistance. This leads to the formation of cracks at the start of casting and to the sticking of the ceramic to the remaining metal residues (so-called "casting bones") after casting. This makes it difficult to separate and reuse the steel parts.
Es ist auch bereits vorgeschlagen worden (
Die Vorteile kohlenstoffhaltiger und kohlenstoffgebundener feuerfester Materialien in Anwendungen der Eisen- und Stahlindustrie sind für sich seit langem bekannt. Dabei werden die Eigenschaften von Kohlenstoffmaterialien ausgenutzt, dass sie von Stahl schlechter benetzbar sind als Keramik und meist noch flüchtige Bestandteile enthalten, die bei Temperatureinwirkung ein Dampfpolster bilden und dadurch Thermoschock mildern und Infiltration verhindern. Sekundär wird dadurch die Erosion des Feuerfestmaterials verhindert, nichtmetallische Einschlüsse im Stahl werden vermieden und die Stahlqualität wird verbessert. Die Wiederverwendung der Gießknochen wird deutlich erleichtert.The benefits of carbonaceous and carbon-bonded refractory materials in iron and steel industry applications have long been known per se. The properties of carbon materials are exploited to the extent that they are less wettable by steel than ceramics and usually contain volatile constituents which form a vapor cushion when exposed to heat, thereby reducing thermal shock and preventing infiltration. Secondarily, this prevents erosion of the refractory material, prevents non-metallic inclusions in the steel and improves the steel quality. The reuse of the casting bones is greatly facilitated.
Der Erfindung liegt daher die Aufgabe zu Grunde, das eingangs genannte Feuerfestmaterial und daraus hergestellte Formkörper vorzuschlagen, bei denen nichtmetallische Einschlüsse im Stahl zuverlässig verhindert werden, um die Stahlqualität zu erhöhen.The invention is therefore based on the object to propose the initially mentioned refractory material and moldings produced therefrom, in which non-metallic inclusions are reliably prevented in the steel in order to increase the steel quality.
Ein entsprechendes erfindungsgemäßes Feuerfestmaterial zeichnet sich dadurch aus, dass das Feuerfestmaterial mindestens stahlseitig kohlenstoffhaltige Komponenten enthält, mit diesen Komponenten gebunden ist und/oder beschichtet und/oder getränkt ist.A corresponding refractory material according to the invention is characterized in that the refractory material contains carbon-containing components at least on the steel side, with these Components is bound and / or coated and / or soaked.
Ein aus dem erfindungsgemäßen Feuerfestmaterial hergestellter Formkörper ist dadurch gekennzeichnet, dass der Formkörper als Hohlware stranggezogen oder, alternativ, trockengepresst kohlenstoffgebunden ist.A molded article produced from the refractory material according to the invention is characterized in that the shaped article is extruded as hollowware or, alternatively, dry-pressed carbon-bonded.
Gemäß einer weiteren Lehre der Erfindung ist Bindekomponente und/oder die Tränk- und/oder Beschichtungskomponente ein Kunstharz, Teer, Pech, Teer- oder Pechersatz oder ein sonstiges für feuerfeste Zwecke geeignetes kohlenstoffhaltiges Binde-, Tränk- oder Imprägniermittel.According to another teaching of the invention, the binding component and / or the impregnating and / or coating component is a synthetic resin, tar, pitch, tar or pitch substitute or another suitable carbonaceous binding, impregnating or impregnating agent suitable for refractory purposes.
In weiterer Ausgestaltung der Erfindung können in dem Feuerfestmaterial weitere kohlenstoffhaltige Feststoffkomponenten wie Ruß, Graphit, Harzpulver, feingemahlene Kohle oder dergleichen enthalten sein.In a further embodiment of the invention may be included in the refractory material further carbonaceous solid components such as carbon black, graphite, resin powder, finely ground coal or the like.
Eine weitere Lehre der Erfindung sieht vor, dass das Feuerfestmaterial vor dem Beschichten, Tränken oder Imprägnieren ein keramisch gebundenes gebranntes Feuerfestmaterial ist. Dies ist besonders dann von Interesse, wenn das Feuerfestmaterial für Formkörper mit aufwändigeren Geometrien handelt.Another teaching of the invention provides that the refractory material prior to coating, impregnation or impregnation is a ceramic bonded fired refractory material. This is of particular interest when the refractory material for moldings involves more complex geometries.
Nach dem Beschichten, Tränken oder Imprägnieren kann das Feuerfestmaterial einer geeigneten Temperaturbehandlung unterzogen werden.After coating, impregnating or impregnating, the refractory material may be subjected to a suitable temperature treatment.
Eine weitere Ausgestaltung der Erfindung sieht vor, dass Feuerfestmaterial weitere nicht kohlenstoffhaltige Bestandteile aufweist, wie beispielsweise Schamotte, Andalusit, Sinterbauxit, Tabular, Tonerde, Schmelkorunde, Magnesia und ähnliche Füllstoffe.A further embodiment of the invention provides that refractory material has other non-carbonaceous constituents, such as chamotte, andalusite, Sinterbauxit, Tabular, alumina, Schmelkorunde, magnesia and similar fillers.
Mit dem erfindungsgemäßen Feuerfestmaterial lassen sich neben Rohr- und Kanalsteinen auch „besondere” Formkörper herstellen, wie Einlauftrichter, König- oder Steigersteine.With the refractory material according to the invention can be in addition to pipe and channel stones also "special" moldings produced, such as inlet funnel, king or Steigersteine.
Bei stranggezogenen Formkörpern erfolgt nach einer weiteren Lehre der Erfindung das Beschichten und/oder Tränken Stahl- oder allseitig, je nach spezifischem Einbauort und gewünschter Standzeit.In extruded moldings is carried out according to another teaching of the invention, the coating and / or impregnation steel or on all sides, depending on the specific installation location and desired life.
Die Erkenntnisse wurden in praktischen Versuchen in Stahlwerken erprobt und bestätigt. Dabei brachten Sorten mit Kohlenstoffbindung vergleichbare Ergebnisse wie keramisch gebundene und gebrannte Hohlware mit einseitiger (stahlseitiger) oder allseitiger Beschichtung und Tränkung mit kohlenstoffhaltigen Komponenten. Die Gefahr des Aufkohlens des Stahls („carbon pick up”) wurde in den bisher untersuchten Fällen als vernachlässigbar beurteilt.The findings were tested and confirmed in practical tests in steel mills. Carbonaceous grades produced comparable results as ceramic bonded and fired hollowware with one-sided (steel-sided) or all-sided coating and impregnation with carbon-containing components. The risk of carburizing the steel ("carbon pick-up") was assessed as negligible in the cases investigated so far.
Die Erfindung beruht hauptsächlich auf der Tatsache, dass kohlenstoffhaltige Bauteile im Stahlunterguss bisher nicht verwendet werden. Erfindungsgemäß ist erreicht worden, derartige Materialien für die Herstellung von Hohlware anzupassen und anzuwenden.The invention is mainly based on the fact that carbonaceous components in the steel substructure have not yet been used. According to the invention has been achieved to adapt and apply such materials for the production of hollowware.
Die Erfindung wird nachfolgend anhand einer lediglich ein schematisches Ausführungsbeispiel darstellenden Zeichnung näher erläutert. In der Zeichnung zeigenThe invention will be explained in more detail with reference to a drawing showing only a schematic embodiment. In the drawing show
In
Erfindungsgemäß bestehen sämtliche mit der flüssigen Stahlschmelze in Kontakt tretenden Steine des Untergussgespanns, nämlich Einlauftrichter
In
Noch deutlicher wird dies in
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 10140019 C1 [0007] DE 10140019 C1 [0007]
Claims (15)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009052279A DE102009052279A1 (en) | 2009-11-09 | 2009-11-09 | Carbon-containing refractory material for use in the casting of steel in the sub-casting process and moldings produced therefrom |
PCT/EP2010/066743 WO2011054872A1 (en) | 2009-11-09 | 2010-11-03 | Carbonaceous fireproof material for use when casting steel in a bottom casting process and formed parts produced thereof |
TW099137951A TW201125835A (en) | 2009-11-09 | 2010-11-04 | Carbon-containing refractory material for use in the casting of steel by the bottom pour method and shaped bodies produced therefrom |
ARP100104127A AR078932A1 (en) | 2009-11-09 | 2010-11-05 | REFRACTORY MATERIAL CONTAINING CARBON FOR USE IN THE STEEL MOLDING BY THE PROCEDURE OF DISCHARGE BY THE FUND AND PROFILED BODIES PRODUCED OF THE SAME |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009052279A DE102009052279A1 (en) | 2009-11-09 | 2009-11-09 | Carbon-containing refractory material for use in the casting of steel in the sub-casting process and moldings produced therefrom |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102009052279A1 true DE102009052279A1 (en) | 2011-06-01 |
Family
ID=43640540
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102009052279A Ceased DE102009052279A1 (en) | 2009-11-09 | 2009-11-09 | Carbon-containing refractory material for use in the casting of steel in the sub-casting process and moldings produced therefrom |
Country Status (4)
Country | Link |
---|---|
AR (1) | AR078932A1 (en) |
DE (1) | DE102009052279A1 (en) |
TW (1) | TW201125835A (en) |
WO (1) | WO2011054872A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107876700A (en) * | 2016-09-29 | 2018-04-06 | 宝山钢铁股份有限公司 | One kind molding apparatus for pouring |
DE102018115066A1 (en) * | 2018-06-22 | 2019-12-24 | Steuler Korrosionsschutz Holding GmbH | Deflection device for deflecting a melt stream in a casting group during block casting, casting group, pressing tool and manufacturing method |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103204687B (en) * | 2013-03-28 | 2015-02-25 | 安徽马钢耐火材料有限公司 | Steel-casting brick for producing high-grade special alloy steel and production method thereof |
CN105149530B (en) * | 2015-08-20 | 2017-07-07 | 攀钢集团西昌钢钒有限公司 | The knotting method of vanadium iron ingot mould |
DE102016100810A1 (en) | 2016-01-19 | 2017-07-20 | Deutsche Edelstahlwerke Gmbh | Refractory material and its use |
CN107150120B (en) * | 2017-04-14 | 2019-07-26 | 洛阳鹏飞耐磨材料股份有限公司 | A kind of preparation process of alloy-silicate complex matrix ceramic wafer |
Citations (8)
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DE2000004A1 (en) * | 1970-01-02 | 1971-07-08 | Correcta Werke Gmbh | Profiled moulded casting channel pattern |
DE3036178A1 (en) * | 1979-10-09 | 1981-04-23 | Siltec Corp., Menlo Park, Calif. | PIPE FOR TRANSMITTING A LIQUID FLOW FROM MOLTEN SEMICONDUCTOR MATERIAL |
ATE13829T1 (en) * | 1980-11-26 | 1985-07-15 | Daussan & Co | THERMAL INSULATION TUBE FOR METALLURGICAL VESSEL. |
DE3439954C2 (en) * | 1984-11-02 | 1988-10-27 | Didier-Werke Ag, 6200 Wiesbaden, De | |
DE19856992C2 (en) * | 1997-06-28 | 2000-11-02 | Didier Werke Ag | Ceramic composite body |
DE10140019C1 (en) | 2001-08-16 | 2003-01-23 | Thyssenkrupp Stahl Ag | Casting system used for ingot casting or continuous casting comprises a casting mold and baffles connected to the molds to remove aluminum impurities and arranged in a channel system which leads to the casting mold |
DE112005000027T5 (en) * | 2004-02-20 | 2007-01-04 | Hoei Shokai Co., Ltd., Toyota | Container, storage bath and method for producing the container |
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 |
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DE3827424A1 (en) * | 1988-08-12 | 1990-02-15 | Didier Werke Ag | SUBMERSIBLE SPOUTS FOR METAL MELTING |
US5151200A (en) * | 1988-10-14 | 1992-09-29 | Dresser Industries, Inc. | High aluminia tar-impregnated pressure pouring tubes |
JP3155217B2 (en) * | 1995-12-13 | 2001-04-09 | 品川白煉瓦株式会社 | Carbon-containing refractory and production method thereof |
JP3615400B2 (en) * | 1998-09-30 | 2005-02-02 | 品川白煉瓦株式会社 | Unfired carbon-containing refractories and molten metal containers |
-
2009
- 2009-11-09 DE DE102009052279A patent/DE102009052279A1/en not_active Ceased
-
2010
- 2010-11-03 WO PCT/EP2010/066743 patent/WO2011054872A1/en active Application Filing
- 2010-11-04 TW TW099137951A patent/TW201125835A/en unknown
- 2010-11-05 AR ARP100104127A patent/AR078932A1/en unknown
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2000004A1 (en) * | 1970-01-02 | 1971-07-08 | Correcta Werke Gmbh | Profiled moulded casting channel pattern |
DE3036178A1 (en) * | 1979-10-09 | 1981-04-23 | Siltec Corp., Menlo Park, Calif. | PIPE FOR TRANSMITTING A LIQUID FLOW FROM MOLTEN SEMICONDUCTOR MATERIAL |
ATE13829T1 (en) * | 1980-11-26 | 1985-07-15 | Daussan & Co | THERMAL INSULATION TUBE FOR METALLURGICAL VESSEL. |
DE3439954C2 (en) * | 1984-11-02 | 1988-10-27 | Didier-Werke Ag, 6200 Wiesbaden, De | |
DE19856992C2 (en) * | 1997-06-28 | 2000-11-02 | Didier Werke Ag | Ceramic composite body |
DE10140019C1 (en) | 2001-08-16 | 2003-01-23 | Thyssenkrupp Stahl Ag | Casting system used for ingot casting or continuous casting comprises a casting mold and baffles connected to the molds to remove aluminum impurities and arranged in a channel system which leads to the casting mold |
DE112005000027T5 (en) * | 2004-02-20 | 2007-01-04 | Hoei Shokai Co., Ltd., Toyota | Container, storage bath and method for producing the container |
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 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107876700A (en) * | 2016-09-29 | 2018-04-06 | 宝山钢铁股份有限公司 | One kind molding apparatus for pouring |
CN107876700B (en) * | 2016-09-29 | 2019-09-20 | 宝山钢铁股份有限公司 | A kind of molding casting device |
DE102018115066A1 (en) * | 2018-06-22 | 2019-12-24 | Steuler Korrosionsschutz Holding GmbH | Deflection device for deflecting a melt stream in a casting group during block casting, casting group, pressing tool and manufacturing method |
Also Published As
Publication number | Publication date |
---|---|
AR078932A1 (en) | 2011-12-14 |
WO2011054872A1 (en) | 2011-05-12 |
TW201125835A (en) | 2011-08-01 |
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