EP1789220B1 - Stopper rod for delivering gas into a molten metal - Google Patents
Stopper rod for delivering gas into a molten metal Download PDFInfo
- Publication number
- EP1789220B1 EP1789220B1 EP05763960A EP05763960A EP1789220B1 EP 1789220 B1 EP1789220 B1 EP 1789220B1 EP 05763960 A EP05763960 A EP 05763960A EP 05763960 A EP05763960 A EP 05763960A EP 1789220 B1 EP1789220 B1 EP 1789220B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- stopper
- stopper rod
- rod according
- gas
- 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.)
- Not-in-force
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
- B22D41/14—Closures
- B22D41/16—Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
- B22D41/18—Stopper-rods therefor
-
- 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
- B22D41/14—Closures
- B22D41/16—Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
- B22D41/18—Stopper-rods therefor
- B22D41/186—Stopper-rods therefor with means for injecting a fluid into the melt
-
- 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
- B22D41/14—Closures
- B22D41/16—Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
Definitions
- This invention relates to a mono-block stopper rod used to control the flow of molten metal from a discharge nozzle in a holding vessel during metal teeming.
- the use of gases injected down the stopper has been shown to have significant benefits on the quality of metal being cast.
- inert gases such as argon or nitrogen can be injected to reduce the problems due to alumina build-up and clogging or to assist in removing solidification products from the vicinity of the discharge nozzle.
- Reactive gases may also be employed when the melt composition needs modifying.
- the stopper - generally made from an alumina carbon refractory composition - is provided with an internal chamber connected to gas supply means on the one end and to a gas discharge port at the other end.
- the carbon present in the composition constituting the stopper body could reduce some of the metal oxides also present in the composition; this reduction is accompanied by the generation of carbon monoxide.
- the carbon monoxide injected into the molten metal will in turn oxidize the aluminum which has been added to calm the steel producing thereby important quantities of alumina contributing thus to the alumina build-up and clogging.
- a stopper rod adapted to deliver gas during pouring of molten metal comprising a stopper body having an internal chamber and a gas discharge port, a bore connecting the internal chamber to the gas discharge port, the internal chamber and the bore defining a gas passageway.
- the walls of the gas passageway are provided with a layer of a material which will not produce carbon monoxide at the temperature of use.
- the layer can be formed as a coating applied on the walls of the gas passageway after the manufacture of the stopper rod.
- a coating can be applied by spraying a liquid, wet or semi-wet composition or simply by filling the inner chamber with the appropriate composition. Once the coating is dried, the stopper rod can then be cured. Alternatively, the curing of the stopper can take place before the coating step.
- the layer is a liner pressed simultaneously with the stopper rod body. In this case, it is indeed possible to reduce the number of manufacturing steps. According to another variant, the layer extends through essentially the whole thickness of the walls of the gas passageway.
- the material constituting the a layer which will not produce carbon monoxide at the temperature of use can be selected from three different categories of materials:
- suitable material of the first category are silica (for example vitreous silica), alumina, mullite or magnesia based material (spinel). In certain cases, these materials can however be somehow difficult to apply as a liner or coating (the lack of carbon in the layer can cause some thermal shock problems) and do not constitute the preferred embodiment of the invention.
- Suitable materials of the second category are for example pure alumina carbon compositions.
- these compositions should contain very low amount of silica or of conventional impurities which are usually found in silica (sodium or potassium oxide).
- the silica and its conventional impurities should be kept under 2 wt. %, preferably under 1 wt. %.
- Suitable materials of the third category comprises for example free metal able to combine with carbon monoxide to form a metal oxide and free carbon.
- Silicon and aluminum are suitable for this application. These materials can also or alternatively comprise carbides or nitrides able to react with carbon monoxide (for example silicon or boron carbides).
- the selected material will belong to the second or third categories, even preferably, it will belong to the second and third category.
- a suitable material constituting the layer which will not produce carbon monoxide at the temperature of use can comprise 60 to 88 wt. % of alumina, 10 to 20 wt. % graphite and 2 to 10 wt. % of silicon carbide.
- Such a material is essentially constituted of non-oxides species or non-reducible oxides and comprises silicon carbide which can react with the carbon monoxide if some is generated in working condition.
- Fig. 1 shows a cross-section of a stopper rod according to the invention.
- Reference 1 depicts respectively the internal chamber and a gas discharge port of the stopper rod.
- a bore 3 connects the internal chamber 1 to the gas discharge port 2.
- the bore 3 and the internal chamber 1 define a passageway for the gas.
- Fig. 1 represents an embodiment wherein the layer 4 has been copressed as a liner with the stopper body.
- the liner 4 can be constituted of several pre-formed tubular portions (41, 42, 43) which are all copressed with the stopper body.
- a portion of the metal rod 5 connecting the stopper rod to the rigging device (not shown) is depicted in working position.
- the metal rod 5 extends beyond the highest point of the layer 4.
- a sealing gasket 6 is inserted around the lower end of the metal rod 5.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Furnace Charging Or Discharging (AREA)
- Continuous Casting (AREA)
- Furnace Details (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Manufacture And Refinement Of Metals (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL05763960T PL1789220T3 (pl) | 2004-07-20 | 2005-07-15 | Żerdź zatyczkowa do dostarczania gazu do roztopionego metalu |
EP05763960A EP1789220B1 (en) | 2004-07-20 | 2005-07-15 | Stopper rod for delivering gas into a molten metal |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04447179 | 2004-07-20 | ||
PCT/BE2005/000116 WO2006007672A2 (en) | 2004-07-20 | 2005-07-15 | Stopper rod for delivering gas into a molten metal |
EP05763960A EP1789220B1 (en) | 2004-07-20 | 2005-07-15 | Stopper rod for delivering gas into a molten metal |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1789220A2 EP1789220A2 (en) | 2007-05-30 |
EP1789220B1 true EP1789220B1 (en) | 2007-12-19 |
Family
ID=34933070
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05763960A Not-in-force EP1789220B1 (en) | 2004-07-20 | 2005-07-15 | Stopper rod for delivering gas into a molten metal |
Country Status (20)
Country | Link |
---|---|
US (1) | US20070210494A1 (ja) |
EP (1) | EP1789220B1 (ja) |
JP (1) | JP4933430B2 (ja) |
KR (1) | KR101128610B1 (ja) |
CN (1) | CN1988972A (ja) |
AR (1) | AR050257A1 (ja) |
AT (1) | ATE381402T1 (ja) |
AU (1) | AU2005263118B2 (ja) |
BR (1) | BRPI0513258B1 (ja) |
CA (1) | CA2572497C (ja) |
DE (1) | DE602005003968T2 (ja) |
ES (1) | ES2299056T3 (ja) |
MX (1) | MX2007000764A (ja) |
MY (1) | MY141417A (ja) |
PL (1) | PL1789220T3 (ja) |
RU (1) | RU2375150C2 (ja) |
TW (1) | TWI357837B (ja) |
UA (1) | UA89642C2 (ja) |
WO (1) | WO2006007672A2 (ja) |
ZA (1) | ZA200700750B (ja) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202007019036U1 (de) * | 2007-01-26 | 2010-06-17 | Innotec Ltd. | Stopfen für die Regelung des Zuflusses von flüssigem Metall von einem Behälter in eine Gussanlage |
ES2351075T3 (es) * | 2008-11-19 | 2011-01-31 | REFRACTORY INTELLECTUAL PROPERTY GMBH & CO. KG | Cuerpo de tapón. |
PL2209056T3 (pl) * | 2009-01-16 | 2012-05-31 | Refractory Intellectual Property Gmbh & Co Kg | Urządzenie kontroli przepływu w ciągłym procesie wytapiania stali odlewniczej |
CN101513670B (zh) * | 2009-03-18 | 2010-12-01 | 山东中齐耐火材料集团有限公司 | 一种整体塞棒丝杆连接装置及其制作方法 |
EP2572813B1 (en) * | 2011-09-23 | 2013-08-07 | Refractory Intellectual Property GmbH & Co. KG | Ceramic refractory stopper |
ES2464149T3 (es) * | 2012-04-16 | 2014-05-30 | Refractory Intellectual Property Gmbh & Co. Kg | Tapón refractario cerámico |
CN104368804B (zh) * | 2014-09-25 | 2016-08-24 | 武汉重工铸锻有限责任公司 | 塞头与喷嘴接头的整体加工方法 |
JP7022095B2 (ja) * | 2019-03-28 | 2022-02-17 | 日本製鋼所M&E株式会社 | ストッパ |
JP2022552257A (ja) | 2019-10-10 | 2022-12-15 | リフラクトリー インテレクチュアル プロパティ ゲーエムベーハー ウント コ カーゲー | 溶融金属の処理に使用するための静水圧プレス製造物および製造方法 |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3200457A (en) * | 1964-03-09 | 1965-08-17 | United States Steel Corp | Method of regulating the discharge of molten metal from ladles |
US3565412A (en) * | 1968-12-03 | 1971-02-23 | Dresser Ind | Device for stirring molten metal |
IT1156736B (it) * | 1978-05-12 | 1987-02-04 | Centro Speriment Metallurg | Metodo per l'introduzione di sostanze disossi-desolforanti sotto battente di metalli liquidi senza impiego di veicoli gassosi |
US4682718A (en) * | 1983-08-16 | 1987-07-28 | Toshiba Ceramics Co., Ltd. | Nozzle for continuous casting of molten steel |
JPS6246167A (ja) * | 1985-08-22 | 1987-02-28 | 株式会社東芝 | 除霜装置 |
US4870037A (en) * | 1987-09-23 | 1989-09-26 | Vesuvius Crucible Company | Prevention of Al2 O3 formation in pouring nozzles and the like |
US5185300A (en) * | 1991-03-11 | 1993-02-09 | Vesuvius Crucible Company | Erosion, thermal shock and oxidation resistant refractory compositions |
GB2263427A (en) * | 1992-01-09 | 1993-07-28 | Thor Ceramics Ltd | Refractory stopper rod with a lined channel |
JP2627473B2 (ja) * | 1992-07-15 | 1997-07-09 | 新日本製鐵株式会社 | 連続鋳造用ロングストッパー |
FR2695848B1 (fr) * | 1992-09-21 | 1994-12-09 | Lorraine Laminage | Busette de coulée de métal et procédés de fabrication de cette busette. |
US5370370A (en) * | 1993-02-19 | 1994-12-06 | Vesuvius Crucible Company | Liner for submerged entry nozzle |
IN191421B (ja) * | 1994-06-15 | 2003-11-29 | Vesuvius Frnance Sa | |
US5681499A (en) * | 1994-06-15 | 1997-10-28 | Vesuvius Crucible Company | Method and compositions for making refractory shapes having dense, carbon free surfaces and shapes made therefrom |
JP2796524B2 (ja) * | 1996-04-11 | 1998-09-10 | 品川白煉瓦株式会社 | 複合浸漬ノズル |
CZ20011647A3 (cs) * | 1998-11-20 | 2001-10-17 | Vesuvius Crucible Company | Zátková tyč |
AU5542700A (en) * | 1999-06-22 | 2001-01-09 | Foseco International Limited | Article formed from carbon-bonded refractory material |
JP3426177B2 (ja) * | 1999-12-28 | 2003-07-14 | 明智セラミックス株式会社 | 鋳造用ストッパー |
KR20020054132A (ko) * | 2000-12-27 | 2002-07-06 | 이구택 | 연속주조용 가스 채널형 스토퍼 및 이를 이용한연속주조방법 |
US6475426B1 (en) * | 2001-03-27 | 2002-11-05 | Vesuvius Crucible Company | Resin-bonded liner |
-
2005
- 2005-07-15 RU RU2007100205/02A patent/RU2375150C2/ru not_active IP Right Cessation
- 2005-07-15 WO PCT/BE2005/000116 patent/WO2006007672A2/en active IP Right Grant
- 2005-07-15 UA UAA200701790A patent/UA89642C2/ru unknown
- 2005-07-15 DE DE602005003968T patent/DE602005003968T2/de active Active
- 2005-07-15 BR BRPI0513258A patent/BRPI0513258B1/pt not_active IP Right Cessation
- 2005-07-15 MX MX2007000764A patent/MX2007000764A/es active IP Right Grant
- 2005-07-15 AT AT05763960T patent/ATE381402T1/de active
- 2005-07-15 ES ES05763960T patent/ES2299056T3/es active Active
- 2005-07-15 KR KR1020077001592A patent/KR101128610B1/ko not_active IP Right Cessation
- 2005-07-15 EP EP05763960A patent/EP1789220B1/en not_active Not-in-force
- 2005-07-15 CA CA2572497A patent/CA2572497C/en not_active Expired - Fee Related
- 2005-07-15 PL PL05763960T patent/PL1789220T3/pl unknown
- 2005-07-15 US US11/630,633 patent/US20070210494A1/en not_active Abandoned
- 2005-07-15 ZA ZA200700750A patent/ZA200700750B/xx unknown
- 2005-07-15 AU AU2005263118A patent/AU2005263118B2/en not_active Ceased
- 2005-07-15 CN CNA2005800244202A patent/CN1988972A/zh active Pending
- 2005-07-15 JP JP2007521753A patent/JP4933430B2/ja not_active Expired - Fee Related
- 2005-07-19 AR ARP050102974A patent/AR050257A1/es not_active Application Discontinuation
- 2005-07-19 MY MYPI20053295A patent/MY141417A/en unknown
- 2005-07-19 TW TW094124292A patent/TWI357837B/zh not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
PL1789220T3 (pl) | 2008-07-31 |
DE602005003968T2 (de) | 2008-12-04 |
JP4933430B2 (ja) | 2012-05-16 |
ZA200700750B (en) | 2008-08-27 |
AU2005263118B2 (en) | 2009-02-19 |
MY141417A (en) | 2010-04-30 |
DE602005003968D1 (de) | 2008-01-31 |
MX2007000764A (es) | 2007-03-28 |
AR050257A1 (es) | 2006-10-11 |
CA2572497C (en) | 2012-05-01 |
EP1789220A2 (en) | 2007-05-30 |
TWI357837B (en) | 2012-02-11 |
CN1988972A (zh) | 2007-06-27 |
KR101128610B1 (ko) | 2012-03-26 |
RU2007100205A (ru) | 2008-08-27 |
BRPI0513258A (pt) | 2008-04-29 |
CA2572497A1 (en) | 2006-01-26 |
UA89642C2 (ru) | 2010-02-25 |
ES2299056T3 (es) | 2008-05-16 |
BRPI0513258B1 (pt) | 2016-09-27 |
WO2006007672A3 (en) | 2006-03-02 |
KR20070030913A (ko) | 2007-03-16 |
JP2008506536A (ja) | 2008-03-06 |
WO2006007672A2 (en) | 2006-01-26 |
AU2005263118A1 (en) | 2006-01-26 |
RU2375150C2 (ru) | 2009-12-10 |
US20070210494A1 (en) | 2007-09-13 |
TW200615062A (en) | 2006-05-16 |
ATE381402T1 (de) | 2008-01-15 |
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