DE2849897A1 - SPOUT FOR CONTINUOUS METAL CASTING - Google Patents
SPOUT FOR CONTINUOUS METAL CASTINGInfo
- Publication number
- DE2849897A1 DE2849897A1 DE19782849897 DE2849897A DE2849897A1 DE 2849897 A1 DE2849897 A1 DE 2849897A1 DE 19782849897 DE19782849897 DE 19782849897 DE 2849897 A DE2849897 A DE 2849897A DE 2849897 A1 DE2849897 A1 DE 2849897A1
- Authority
- DE
- Germany
- Prior art keywords
- refractory
- spout
- added
- granulate
- metals
- 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.)
- Withdrawn
Links
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
- B22D41/52—Manufacturing or repairing thereof
- B22D41/54—Manufacturing or repairing thereof characterised by the materials used therefor
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/101—Refractories from grain sized mixtures
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
- C04B35/482—Refractories from grain sized mixtures
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/71—Ceramic products containing macroscopic reinforcing agents
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Composite Materials (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Ceramic Products (AREA)
Description
Ausguss für das Stranggiessen von Metallen Spout for the continuous casting of metals
Die Erfindung betrifft einen Ausguss für das Stranggiessen von Metallen und insbesondere von Stahl.The invention relates to a nozzle for the continuous casting of metals and especially of steel.
Bekanntlich wird beim Stranggiessen von Metallen, insbesondere von Stahl, das meistens in einem Konverter aufbereitete Metall in einen sogenannten Zwischenbehälter abgegossen, aus dem es kontinuierlich über ein besonderes Auslassrohr, der Ausguss genannt ist, in die Kokille fliesst; während der gesamten Giessdauer taucht das untere Ende dieses Ausgusses im allgemeinen in das in der Kokille befindliche Metall ein.It is known that in the continuous casting of metals, in particular of Steel, the metal usually processed in a converter into a so-called The intermediate container is poured off from which it is continuously discharged via a special outlet pipe, the spout is named, flows into the mold; during the entire casting period The lower end of this spout generally dips into that in the mold Metal one.
Der Ausguss besteht meistens aus einer Kombination von feuerfesten Materialien und in der Hauptsache aus Korund, Tonerdesilikat und Graphit sowie in einem geringeren Anteil aus Ton, Silizium und Siliziumkarbid, wobei ausserdem noch weitere Feuerfeststoffkomponenten in geringen Mengen vorhanden sein können. Eine derartige Zusammensetzung wird nachfolgend als "herkömmliche Zusammensetzung bezeichnet und präsentiert sich in Form eines Granulats.The sink mostly consists of a combination of refractories Materials and mainly made of corundum, alumina silicate and graphite as well as in a smaller proportion of clay, silicon and silicon carbide, with also still other refractory components may be present in small quantities. One such a composition is hereinafter referred to as "conventional composition and is presented in the form of granules.
Ein derartiger Ausguss muss nicht nur den durch die Temperatur des vergossenen Metalls bedingten thermischen Beanspruchungen standhalten können, sondern auch jeder Art von chemischem Angriff durch das Metall, mechanischen Beanspruchungen infolge der Kokillen-Schwingbewegungen sowie schliesslich den chemischen Angriffen durch die Schlacke, die durch den Prozess des Schmelzens des üblicherweise auf die Oberfläche des in der Kokille befindlichen flüssigen Metalls aufgebrachten Abdeckpulvers bedingt sind.Such a spout not only has to be affected by the temperature of the cast metal can withstand thermal stresses, but also any kind of chemical attack by the metal, mechanical stresses as a result of the mold oscillating movements and finally the chemical attacks by the slag that goes through the process of melting the commonly used on the Covering powder applied to the surface of the liquid metal located in the mold are conditional.
Diese Pulver, deren chemische Reaktionen zuweilen exotherm ablaufen, bestehen in der Hauptsache aus Kieselsäure, Tonerde, CaO, MgO, alkalischen Stoffen, Kohlenstoff usw.These powders, the chemical reactions of which are sometimes exothermic, consist mainly of silica, alumina, CaO, MgO, alkaline substances, Carbon etc.
Es wurde festgestellt, dass bei gleichzeitigem Vorhandensein dieser Pulver und von Flüssigmetall in Kontakt mit dem Ausguss oft ein schneller chemischer Angriff an demselben erfolgte, der sich in den meisten Fällen bis zur Zerstörung des angegriffenen Ausgussteils fortsetzte.It was found that the coexistence of this Powder and liquid metal in contact with the sink is often a quick chemical Attack took place on the same, which in most cases extended to destruction of the attacked spout continued.
Es wurden bereits die verschiedensten Versuche unternommen, um die Auswirkungen solcher Angriffe zu reduzieren, doch können die bisher erzielten Ergebnisse noch nicht als zufriedenstellend angesehen werden.A wide variety of attempts have been made to the Reduce the impact of such attacks, however, can reduce the results achieved so far cannot yet be considered satisfactory.
Die Erfindung betrifft einen Ausguss, dessen Zusammensetzung zumindest in der Zone des kombinierten Kontakts mit dem vergossenen Metall und dem Abdeckpulver klar besser dem Angriff durch die Oxyde bzw. Silikate des Pulvers standzuhalten vermag.The invention relates to a spout, the composition of which at least in the zone of combined contact with the encapsulated metal and the covering powder clearly better the attack through the oxides or silicates of the powder able to withstand.
Der erfindungsgemässe Ausguss ist im wesentlichen dadurch gekennzeichnet, dass sein Granulat von herkömmlicher Zusammensetzung anstelle seines vollen oder teilweisen Graphitanteils ein oder mehrere Feuerfestoxyde (beispielsweise Zr, Al) und ein oder mehrere Feuerfestmetalle (beispielsweise Mo, Cr) enthält, wobei sich Oxyde) und Metall(e) im Stadium ihrer Aufbereitung vorzugsweise als ein Gemisch mit feiner Teilchenverteilung präsentieren.The spout according to the invention is essentially characterized in that that its granules of conventional composition instead of its full or partial graphite content one or more refractory oxides (e.g. Zr, Al) and contains one or more refractory metals (e.g. Mo, Cr), where Oxides) and metal (s) at the stage of their preparation, preferably as a mixture present with a fine particle size distribution.
Im Augenblick der Herstellung des Ausgusses können diese beiden Materialien entweder in dem gesamten aus verschiedenen Bestandteilen bestehenden Gemisch oder lediglich in derjenigen Zone desselben vorhanden sein, die später in Kontakt mit dem Flüssigbad gelangt.At the moment of making the sink, these two materials can be used either in the entire mixture consisting of different ingredients, or only be present in that zone of the same which is later in contact with reaches the liquid bath.
Hinsichtlich der jeweils gewünschten Endzusammensetzung des Ausgusses bieten sich verschiedene als zweckmässig anzusehende Möglichkeiten an.With regard to the desired final composition of the spout there are various options that can be regarded as useful.
Nach einer ersten Ausgestaltung befindet sich das Beuerfestoxyd direkt im Granulat von herkömmlicher Zusammensetzung anstelle des gesamten oder teilweisen Graphitanteils, während das Feuerfestmetall erst später dem so hergestellten Granulat zugesetzt wird. Wie an anderer Stelle bereits erwähnt, besteht das Feuerfestoxyd zweckmässigerweise zum Beispiel aus ZIXO2 bzw. AL203 in feiner Verteilung.According to a first embodiment, the solid oxide is located directly in granules of conventional composition instead of all or part Graphite, while the refractory metal is added later to the granulate produced in this way is added. As already mentioned elsewhere, there is the refractory oxide expediently, for example, from ZIXO2 or AL203 in fine distribution.
beine zweite Ausgestaltung sieht vor, Feuerfestoxyd und Feuerfestmetall vorher u einem Cermet zu vereinen, das sodann vor der Zugabe ,.um crnnulat gemahlen wird. Im letzteren pille ist nicht ausgeschlossen, dass dem Granulat ausserdem ein oder mehrere Feuerfestmetalle bzw. ein oder mehrere Feuerfestoxyde separat zugesetzt werden.a second embodiment provides refractory oxide and refractory metal to combine beforehand in a cermet, which is then ground to granulate before addition will. In the latter pill it cannot be ruled out that the granules also a or several refractory metals or one or more refractory oxides added separately will.
Es wurde festgestellt, dass Ausgüsse, bei denen der vorbeschriebene Austausch vorgenommen wurde, deutlich besser den verschiedenen mechanischen, thermischen und chemischen Beanspruchungen durch das vergossene Metall bzw.It was found that spouts where the above Replacement was made, significantly better the various mechanical, thermal and chemical stresses caused by the encapsulated metal or
das Abdeckpulver standhalten können.the covering powder can withstand.
J PATENTANSPRÜCHE J,J PATENT CLAIMS J,
Claims (7)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE6046236A BE861127A (en) | 1977-11-23 | 1977-11-23 | IMPROVEMENT OF CONTINUOUS METAL CASTING BUSES |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2849897A1 true DE2849897A1 (en) | 1979-05-31 |
Family
ID=3874758
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19782849897 Withdrawn DE2849897A1 (en) | 1977-11-23 | 1978-11-17 | SPOUT FOR CONTINUOUS METAL CASTING |
Country Status (3)
Country | Link |
---|---|
BE (1) | BE861127A (en) |
DE (1) | DE2849897A1 (en) |
GB (1) | GB2008565B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2486429A1 (en) * | 1980-07-10 | 1982-01-15 | Flocon Italiana | METHOD FOR REPAIRING OR REPLACING REFRACTORY WEAR PARTS OF SLIDING SHUTTER DEVICES |
FR2517997A1 (en) * | 1981-12-10 | 1983-06-17 | Shinagawa Refractories Co | IMMERSION TUBE FOR CONTINUOUS CASTING |
DE2936480C2 (en) * | 1979-09-10 | 1983-11-03 | Akechi Taikarenga K.K., Ena, gifu | Refractory material for an immersion nozzle |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2464769A1 (en) * | 1979-09-10 | 1981-03-20 | Akechi Taikarenga Kk | Casting pipe for continuous casting of steel - with refractory coating resisting erosion by molten casting powder, so pipe has long working life |
DE3507876A1 (en) * | 1985-03-06 | 1986-09-11 | Didier-Werke Ag, 6200 Wiesbaden | USE OF CEMENT-FREE VIBRATION MATERIALS BASED ON ALUMINUM OXIDE AND / OR ZIRCONIUM DIOXIDE FOR THE PRODUCTION OF WEARING PARTS |
-
1977
- 1977-11-23 BE BE6046236A patent/BE861127A/en unknown
-
1978
- 1978-11-17 DE DE19782849897 patent/DE2849897A1/en not_active Withdrawn
- 1978-11-23 GB GB7845735A patent/GB2008565B/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2936480C2 (en) * | 1979-09-10 | 1983-11-03 | Akechi Taikarenga K.K., Ena, gifu | Refractory material for an immersion nozzle |
FR2486429A1 (en) * | 1980-07-10 | 1982-01-15 | Flocon Italiana | METHOD FOR REPAIRING OR REPLACING REFRACTORY WEAR PARTS OF SLIDING SHUTTER DEVICES |
FR2517997A1 (en) * | 1981-12-10 | 1983-06-17 | Shinagawa Refractories Co | IMMERSION TUBE FOR CONTINUOUS CASTING |
Also Published As
Publication number | Publication date |
---|---|
BE861127A (en) | 1978-03-16 |
GB2008565B (en) | 1982-03-24 |
GB2008565A (en) | 1979-06-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8139 | Disposal/non-payment of the annual fee |