EP0637477B1 - Einlaufsystem für eine Aluminiumstranggussanlage - Google Patents
Einlaufsystem für eine Aluminiumstranggussanlage Download PDFInfo
- Publication number
- EP0637477B1 EP0637477B1 EP94108061A EP94108061A EP0637477B1 EP 0637477 B1 EP0637477 B1 EP 0637477B1 EP 94108061 A EP94108061 A EP 94108061A EP 94108061 A EP94108061 A EP 94108061A EP 0637477 B1 EP0637477 B1 EP 0637477B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- plug
- inlet
- section
- supplying system
- 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
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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
- B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/103—Distributing the molten metal, e.g. using runners, floats, distributors
-
- 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
- the invention relates to an inlet system for continuous aluminum casting plants, consisting of a gutter, one in gutter 1 used inlet nozzle 2, in which a plug 3 for regulation of the melt inlet 4 is inserted, the stopper 3 the narrowest cross section of the feed nozzle 2 is the melt feed closes and a control system with which the immersion depth the stopper is controllable within predetermined limits and a method for regulating an enema system.
- the object of the invention is therefore in the enema system To optimize aluminum continuous casting plants so that under Maintaining the essential installations of negative pressure is minimized at the nozzle inlet and at the nozzle outlet and optimized the flow conditions in the inlet nozzle become.
- a procedure for operating the enema system is said to reduce the vortex formation in the melt, so that both on the melt surface in the gutter as well no melt formation in the mold in the mold occur.
- the nozzle contour according to the invention provides that in the The narrowest cross section is in the middle of the inlet nozzle and thus the highest speed in the middle of the nozzle is produced.
- the nozzle shape prevents flow which could reduce the cross-section through which avoided.
- the nozzle is thus evenly over the flows through the entire cross-section, resulting in a optimal volume flow can be set.
- the inlet system consists of one in the channel 1 used inlet nozzle 2 into which a plug 3 for regulation of the melt inlet 4 is used.
- a metal level H is formed above the inlet nozzle 2 in the Channel 1, which is preferably at least 5 cm.
- the melt reaches the mold 5 via the pouring nozzle, where it is formed into an ingot 6, which is placed on the runner 7 is held.
- a lowering device 9 the ingot 6 is down from the mold 5 pulled out.
- nozzles 2 and plugs 3 are shown in FIG remove. It can be seen that the cross sections at the nozzle inlet (X) and nozzle outlet (Y) in relation to the other cross sections the inlet nozzle are chosen large, so that there are low Flow velocities occur.
- the inlet nozzle according to the invention consists of two Cut A1, A2 from the narrowest cross section of the nozzle to the Nozzle entry or exit are measured.
- section A2 In the upper part of the nozzle 2 (section A2) forms between Plug 3 and inner wall of the inlet nozzle from an annular space D, the narrows in the direction of flow.
- the pressure ratios are also increased by an Level difference - in the example 26 cm and 34 cm - hardly changed.
- the closely spaced curves for different level differences show that the flow conditions are very stable and even with high negative pressure the flow in the nozzle does not stop. It follows that the available cross section is relatively even is flowed through and no speed peaks occur.
- FIGS. 6a, b and 5a, b known inlet systems exemplified.
- a downward closing inlet system according to FIG. 4a the vacuum at the nozzle outlet can no longer be reduced as the available cross section at the nozzle outlet very strong due to the stall under the stopper is reduced.
- FIG. 4b shows a known upward closing inlet system shown.
- the negative pressure increases increasing level difference strongly (see Figure 5b).
- This has the consequence that the above the nozzle inlet in the Gutter standing metal column and the associated static Pressure is insufficient to reach the nozzle inlet to compensate for the resulting negative pressure.
- Pressure curves depend on the position of the measuring points dependent.
- the representations in Figure 5a, b are as look at two-dimensional representations and therefore say nothing about the uniformity of the flow over the Circumference of the inlet nozzle. As shown at the beginning, but can be uneven with conventional infeed systems keiten occur over the circumference of the inlet nozzle, whereby Speed peaks arise, which in turn create the negative pressure increase.
- the volume flow can be dosed much more precisely and that Avoid occurrence of instabilities. It showed the glass model that an optimized nozzle also over the Flow is relatively even.
- the known inlet system tends to Turbulence formation. This is shown in FIG. 7 and is explained in more detail below.
- the melt 4 reaches the inlet nozzle in the direction of the arrow through the channel 1 2.
- the resulting at the nozzle inlet and outlet The melt surface becomes underpressure from the air pressure dented, which can tear open the oxide layer and Oxide or dirt particles are sucked into the melt can.
- the non-deformable impurities are in the solidification front installed. In the later rolling process they come to the surface and lead to tearing open of the rolled strip or damage to the rolls.
- FIG 8 is a mechanical control of the mold casting system shown schematically for aluminum ingots. Via a float 14, which on the metal surface of the Barrens is positioned using a mechanical redirector 15 of the stopper 3 by means of a push rod 16 moved up or down.
- the term "swimmer” is used for a piece of refractory material that is on the metal surface floats and the metal stand via a lever reports. In the present case, it becomes the annular gap between nozzle and stopper enlarged or reduced, each after which direction the melt level from the set point deviates. The feed rate of the molten metal is thus regulated by different plug heights.
- the metal level in the mold 5 can be different Reasons fluctuate. For example, the inclination of the Melting furnace not continuously, so that gushing occurs in the channel 1. Even the metal stand in the gutter is usually regulated with a float, so that normally two control systems are coupled together are. This leads to a dynamic control behavior, that during the pouring phase of a constant correction of the each plug height required.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Coating With Molten Metal (AREA)
Description
- Figur 1
- Gesamtansicht eines erfindungsgemäßen Einlaufsystem
- Figur 2
- Erfindungsgemäße Zulaufdüse mit Stopfen im Querschnitt
- Figur 3
- Druckverlauf in einem erfindungusgemäßen Einlaufsystem (Wassermodell)
- Figur 4
- Düsen/Stopfensystem nach dem Stand der Technik
- Figur 5
- Druckverlauf bei einem herkömmlichen Einlaufsystem im Wassermodell
- Figur 6
- Schematische Darstellung einer elektronischen Gießspiegelregelung
- Figur 7
- Gesamtansicht eines Einlaufsystems nach dem Stand der Technik
- Figur 8
- Schematische Darstellung einer mechanischen Gießspiegelregelung
Claims (7)
- Einlaufsystem für Aluminiumstranggußanlagen, bestehend aus einer Rinne, einer in die Rinne (1) eingesetzten Zulaufdüse (2), in die ein Stopfen (3) zur Regulierung des Schmelzezulaufs (4) eingesetzt ist, wobei der Stopfen (3) am engsten Querschnitt der Zulaufdüse (2) den Schmelzezulauf verschließt und einem Regelsystem, mit dem die Eintauchtiefe des Stopfens innerhalb vorgegebener Grenzen steuerbar ist,
dadurch gekennzeichnet,daß vom engsten Querschnitt der Düse (2) zum Düsenein- (X) und Düsenaustritt (Y) ein Abstand (A1, A2) von mindestens 7 cm eingehalten ist,daß am Düseneintritt der Raum zwischen Düse (2) und Stopfen (3) auf einer Länge B verengt wird, die zwischen großer 0 bis 10 cm liegt. - Einlaufsystem nach Anspruch 1,
dadurch gekennzeichnet,daß die Verengung über eine Länge von 1 - 10 cm erfolgt. - Einlaufsystem nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,daß sich oberhalb des engsten Düsenquerschnittes zwischen Düse (2) und Stopfen (3) ein sich in Strömungsrichtung verengender Ringraum D ausbildet, während unterhalb des engsten Düsenquerschnittes der Raum zwischen Düse (2) und Stopfen (3) mit einem Öffnungswinkel von mindestens 4° erweitert wird, wobei die Stopfenspitze S mit einem Radius von 10 - 14 mm abgerundet ist. - Einlaufsystem nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,daß die Kanten am Ein- und Auslauf mit einem Radius von 5 - 25 mm gerundet sind. - Einlaufsystem nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,daß der Ringraum D von einem Ringspalt zwischen Düse (2) und Stopfen (3) gebildet wird, wobei die den Ringspalt bildenden Seitenwände nahezu parallel verlaufen. - Einlaufsystem nach Anspruch 5,
dadurch gekennzeichnet,daß die nahezu parallel verlaufenden Seitenwände des Ringraumes D sich mit einer Winkeldifferenz von ca. 1° in Strömungsrichtung verengen. - Verfahren zur Regelung eines Einlaufsystems für Aluminiumstranggußanlagen nach einem der vorhergehenden Ansprüche 1-6,
dadurch gekennzeichnet,daß ein Metallstand H in der Rinne (1) von mindestens 5 cm über dem Düseneintritt X und eine Eintauchtiefe T der Düse (2) von mindestens 2 cm eingestellt wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4322316A DE4322316C1 (de) | 1993-07-05 | 1993-07-05 | Einlaufsystem für eine Aluminiumstranggußanlage |
DE4322316 | 1993-07-05 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0637477A2 EP0637477A2 (de) | 1995-02-08 |
EP0637477A3 EP0637477A3 (de) | 1996-04-03 |
EP0637477B1 true EP0637477B1 (de) | 1999-03-24 |
Family
ID=6491984
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94108061A Expired - Lifetime EP0637477B1 (de) | 1993-07-05 | 1994-05-26 | Einlaufsystem für eine Aluminiumstranggussanlage |
Country Status (16)
Country | Link |
---|---|
US (1) | US5490554A (de) |
EP (1) | EP0637477B1 (de) |
KR (1) | KR970005376B1 (de) |
AU (1) | AU674749B2 (de) |
BR (1) | BR9402624A (de) |
CA (1) | CA2127321C (de) |
CZ (1) | CZ285017B6 (de) |
DE (2) | DE4322316C1 (de) |
ES (1) | ES2133443T3 (de) |
HU (1) | HU216124B (de) |
NO (1) | NO300034B1 (de) |
PL (1) | PL177723B1 (de) |
RU (1) | RU2091193C1 (de) |
SK (1) | SK78394A3 (de) |
TW (1) | TW289002B (de) |
YU (1) | YU41294A (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19504009A1 (de) * | 1995-02-08 | 1996-08-14 | Vaw Ver Aluminium Werke Ag | Einlaufsystem für eine Aluminiumstranggußanlage |
DE19706151C2 (de) * | 1997-02-18 | 2000-12-07 | Sms Demag Ag | Verfahren und Tauchrohr zum Metallstranggießen |
KR100330352B1 (ko) * | 1999-07-02 | 2002-04-01 | 유현식 | 내충격성이 우수한 신디오탁틱 폴리스티렌 수지 조성물 |
NL1014024C2 (nl) * | 2000-01-06 | 2001-07-09 | Corus Technology Bv | Inrichting en werkwijze voor het continu of semi-continu gieten van aluminium. |
US7041171B2 (en) * | 2003-09-10 | 2006-05-09 | Kastalon, Inc. | Nozzle for use in rotational casting apparatus |
US7270711B2 (en) * | 2004-06-07 | 2007-09-18 | Kastalon, Inc. | Nozzle for use in rotational casting apparatus |
US6989061B2 (en) * | 2003-08-22 | 2006-01-24 | Kastalon, Inc. | Nozzle for use in rotational casting apparatus |
JP5621737B2 (ja) * | 2011-09-15 | 2014-11-12 | 新日鐵住金株式会社 | 連続鋳造における流量調整方法 |
WO2014164911A1 (en) | 2013-03-12 | 2014-10-09 | Novelis Inc. | Intermittent molten metal delivery |
JP2018536085A (ja) * | 2015-09-15 | 2018-12-06 | リテック システムズ エルエルシー | 炉式溶鉱炉などの溶融物制御のためのレーザセンサ |
RU2721258C1 (ru) | 2017-11-15 | 2020-05-18 | Новелис Инк. | Уменьшение превышения или недостающего значения уровня металла при переходе с изменением требования к скорости потока |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB917565A (en) * | 1960-05-13 | 1963-02-06 | Didier Werke Ag | Improvements relating to pouring nozzles for liquid metal |
US4523624A (en) * | 1981-10-22 | 1985-06-18 | International Telephone And Telegraph Corporation | Cast ingot position control process and apparatus |
FR2639267B1 (fr) * | 1988-11-23 | 1991-02-22 | Clecim Sa | Procede et ensemble d'alimentation en metal fondu de la lingotiere d'une installation de coulee continue d'ebauches minces |
US5205343A (en) * | 1989-06-03 | 1993-04-27 | Sms Schloemann-Siemag Aktiengesellschaft | Pouring tube for feeding molten steel into a continuous casting mold |
US5339885A (en) * | 1993-05-07 | 1994-08-23 | Wagstaff Inc. | Integrated non-contact molten metal level sensor and controller |
-
1993
- 1993-07-05 DE DE4322316A patent/DE4322316C1/de not_active Expired - Fee Related
-
1994
- 1994-05-06 KR KR1019940009905A patent/KR970005376B1/ko not_active IP Right Cessation
- 1994-05-19 NO NO941868A patent/NO300034B1/no unknown
- 1994-05-26 DE DE59407993T patent/DE59407993D1/de not_active Expired - Fee Related
- 1994-05-26 EP EP94108061A patent/EP0637477B1/de not_active Expired - Lifetime
- 1994-05-26 ES ES94108061T patent/ES2133443T3/es not_active Expired - Lifetime
- 1994-06-09 HU HUP9401732A patent/HU216124B/hu not_active IP Right Cessation
- 1994-06-16 PL PL94303861A patent/PL177723B1/pl unknown
- 1994-06-28 YU YU41294A patent/YU41294A/sh unknown
- 1994-06-29 SK SK783-94A patent/SK78394A3/sk unknown
- 1994-07-01 TW TW083106018A patent/TW289002B/zh active
- 1994-07-01 CZ CZ941606A patent/CZ285017B6/cs not_active IP Right Cessation
- 1994-07-01 AU AU66132/94A patent/AU674749B2/en not_active Ceased
- 1994-07-04 BR BR9402624A patent/BR9402624A/pt not_active Application Discontinuation
- 1994-07-04 CA CA002127321A patent/CA2127321C/en not_active Expired - Fee Related
- 1994-07-04 RU RU9494024564A patent/RU2091193C1/ru active
- 1994-07-05 US US08/271,890 patent/US5490554A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
SK78394A3 (en) | 1995-09-13 |
EP0637477A3 (de) | 1996-04-03 |
DE4322316C1 (de) | 1995-03-16 |
YU41294A (sh) | 1996-10-09 |
CZ285017B6 (cs) | 1999-05-12 |
NO300034B1 (no) | 1997-03-24 |
KR950002888A (ko) | 1995-02-16 |
RU94024564A (ru) | 1996-04-20 |
RU2091193C1 (ru) | 1997-09-27 |
BR9402624A (pt) | 1995-04-04 |
EP0637477A2 (de) | 1995-02-08 |
CZ160694A3 (en) | 1997-05-14 |
HU9401732D0 (en) | 1994-09-28 |
TW289002B (de) | 1996-10-21 |
KR970005376B1 (ko) | 1997-04-15 |
HU216124B (hu) | 1999-04-28 |
CA2127321A1 (en) | 1995-01-06 |
ES2133443T3 (es) | 1999-09-16 |
HUT67850A (en) | 1995-05-29 |
US5490554A (en) | 1996-02-13 |
AU674749B2 (en) | 1997-01-09 |
PL303861A1 (en) | 1995-01-09 |
NO941868L (no) | 1995-01-06 |
AU6613294A (en) | 1995-01-12 |
CA2127321C (en) | 1999-05-11 |
DE59407993D1 (de) | 1999-04-29 |
NO941868D0 (no) | 1994-05-19 |
PL177723B1 (pl) | 2000-01-31 |
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