EP1900460B1 - Submerged multi nozzle - Google Patents
Submerged multi nozzle Download PDFInfo
- Publication number
- EP1900460B1 EP1900460B1 EP07016955A EP07016955A EP1900460B1 EP 1900460 B1 EP1900460 B1 EP 1900460B1 EP 07016955 A EP07016955 A EP 07016955A EP 07016955 A EP07016955 A EP 07016955A EP 1900460 B1 EP1900460 B1 EP 1900460B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- transverse channel
- channel
- base
- shaft axis
- longitudinal
- 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.)
- Active
Links
- 238000009749 continuous casting Methods 0.000 claims abstract description 5
- 230000007717 exclusion Effects 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims description 6
- 230000005499 meniscus Effects 0.000 claims description 2
- 238000005266 casting Methods 0.000 abstract description 11
- 229910000831 Steel Inorganic materials 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 239000010959 steel Substances 0.000 abstract description 4
- 238000007654 immersion Methods 0.000 description 9
- 239000000155 melt Substances 0.000 description 4
- 230000009189 diving Effects 0.000 description 2
- 230000001914 calming effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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
Definitions
- the invention relates to a submersible nozzle for introducing a molten metal, in particular a liquid steel material with exclusion of air below the casting level of a continuous casting mold.
- the immersion nozzle described therein comprises a shaft with a longitudinal channel extending along its shaft axis and a transverse channel extending at least approximately perpendicular to the shaft axis with at least two lateral outlet openings.
- the longitudinal channel opens with its outlet-side mouth in the transverse channel.
- the bottom on the inside of the transverse channel has a trough opposite the mouth of the longitudinal channel.
- a molten metal is deflected within a pouring tube via a trough in the bottom of the pouring tube and thereby braked so strong that the molten metal emerges almost laminar with correspondingly greatly reduced speed from lateral openings in the Gellorohrwandung in a slab mold.
- the invention is based on the object to further develop a known immersion nozzle so that he also allows the introduction of the melt in deeper areas farther away from the casting mirror.
- the immersion nozzle described above is characterized in that the bottom of the transverse channel in each of the two sections between its two maxima and the lateral outlet openings of the transverse channel has a slot, the slots act as additional outlet openings for the transverse channel.
- the claimed geometric design of the inner contour of the immersion nozzle has the advantage that the casting level still remains quieter even at high casting speeds than in the known from the prior art Tauchausguss, because the velocities or turbulence of the melt in the meniscus due to the claimed embodiment also are much lower than in the prior art.
- the claimed embodiment advantageously ensures a consistently high quality of the resulting cast products even at high casting speeds.
- dip tube geometries are limited in their optimal flow behavior and allow only a limited use within the required width and thickness spectrum.
- the present dip tube geometry increases the range of use under further optimal flow conditions to a volume flow ratio of 1: 7.
- the Figures 1 and 2 show a submersible nozzle 100 according to the present invention for introducing a molten metal, in particular a liquid steel material, under exclusion of air below the casting level of a continuous casting mold (not shown here).
- the immersion nozzle 100 comprises a shaft 110 with a longitudinal channel 112 running along its shaft axis S and a transverse channel 114 extending at least approximately perpendicular to the shaft axis S.
- the transverse channel has two lateral outlet openings 114-1, 114-2.
- the longitudinal channel 112 opens with its outlet-side mouth M in the transverse channel 114th
- the immersion nozzle has a multiplicity of geometric design features, which substantially all serve to keep the casting mirror calm when introducing additional melt.
- the trough M of the longitudinal channel 112 opposite trough Mu is formed in the form of a groove whose longitudinal axis R L at least approximately both transverse to the shaft axis S as well as transverse to the longitudinal axis Q L of the transverse channel 114.
- the trough slows down the speed of the melt as it is redirected from the vertical longitudinal channel 112 into the transverse channel 114.
- the flow direction of the melt is in FIG. 2 indicated by arrows.
- the bottom B is flat in the width direction, ie transverse to the longitudinal axis Q L of the transverse channel 114.
- the profile V of the bottom B is sinusoidal and mirror-inverted to the shaft axis S, wherein the cross section of the trough Mu in the course V represents a minimum at the height of the shaft axis.
- the course V of the ground has on the right and left symmetrically to the minimum represented by the trough each a continuously extending maximum M1, M2.
- the transverse channel 114 and its bottom B each have a straight line with a negative inclination angle ⁇ 1 , ⁇ 2 with respect to the horizontal and mirror image of the shaft axis
- the bottom B has in the region of the two sections I, II in each case a slot 116-1.1 116-2 in the longitudinal direction Q L of the transverse channel 114.
- the bottom B may be at an angle ⁇ with preferably ⁇ 55 ° with respect to the horizontal be chilled.
- the slots 116-1, 116-2 act as additional or enlarged outlet openings of the transverse channel 114. Through them, the additionally introduced by the immersion nozzle molten metal is passed into deeper areas of the existing melt and thus away from the casting mirror; the pouring mirror is not disturbed and remains calm.
- transverse channel 114 is preferably formed with a rectangular cross-section.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Continuous Casting (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Nozzles (AREA)
Abstract
Description
Die Erfindung betrifft einen Tauchausguss zum Einbringen einer Metallschmelze, insbesondere eines flüssigen Stahlwerkstoffs unter Luftabschluss unter den Gießspiegel einer Stranggießkokille.The invention relates to a submersible nozzle for introducing a molten metal, in particular a liquid steel material with exclusion of air below the casting level of a continuous casting mold.
Ein derartiger Tauchausguss ist zum Beispiel in der nicht vorveröffentlichten Druckschrift
Ebenfalls ist ein derartiger Tauchausguss in der Druckschrift
Ausgehend von diesem Stand der Technik liegt der Erfindung die Aufgabe zu Grunde, einen bekannten Tauchausguss dahingehend weiterzubilden, dass er auch das Einbringen der Schmelze in tiefere Bereiche weiter entfernt vom Gießspiegel ermöglicht.Based on this prior art, the invention is based on the object to further develop a known immersion nozzle so that he also allows the introduction of the melt in deeper areas farther away from the casting mirror.
Diese Aufgabe wird durch den Gegenstand des Patentanspruchs 1 gelöst. Demnach ist der oben beschriebenen Tauchausguss dadurch gekennzeichnet, dass der Boden des Querkanals in den beiden Abschnitten zwischen seinen beiden Maxima und den seitlichen Auslassöffnungen des Querkanals jeweils einen Schlitz aufweist, wobei die Schlitze als zusätzliche Auslassöffnungen für den Querkanal fungieren.This object is solved by the subject matter of patent claim 1. Accordingly, the immersion nozzle described above is characterized in that the bottom of the transverse channel in each of the two sections between its two maxima and the lateral outlet openings of the transverse channel has a slot, the slots act as additional outlet openings for the transverse channel.
Die beanspruchte geometrische Ausgestaltung der inneren Kontur des Tauchausgusses bietet den Vorteil, dass der Gießspiegel auch bei hohen Gießgeschwindigkeiten noch ruhiger bleibt als bei dem aus dem Stand der Technik bekannten Tauchausguss, weil die Geschwindigkeiten beziehungsweise Turbulenzen der Schmelze im Bereich des Meniskus aufgrund der beanspruchten Ausgestaltung ebenfalls wesentlich geringer sind als im Stand der Technik. So gewährleistet die beanspruchte Ausgestaltung vorteilhafterweise eine gleichbleibende hohe Qualität der resultierenden Gießprodukte auch bei hohen Gießgeschwindigkeiten.The claimed geometric design of the inner contour of the immersion nozzle has the advantage that the casting level still remains quieter even at high casting speeds than in the known from the prior art Tauchausguss, because the velocities or turbulence of the melt in the meniscus due to the claimed embodiment also are much lower than in the prior art. Thus, the claimed embodiment advantageously ensures a consistently high quality of the resulting cast products even at high casting speeds.
Herkömmliche Tauchrohrgeometrien sind in ihrem optimalen Strömungsverhalten begrenzt und erlauben nur einen begrenzten Einsatz innerhalb des geforderten Breiten- und Dickenspektrums. Die vorliegende Tauchrohrgeometrie erhöht den Einsatzbereich unter weiterhin optimalen Strömungsbedingungen auf ein Volumenstromverhältnis von 1:7.Conventional dip tube geometries are limited in their optimal flow behavior and allow only a limited use within the required width and thickness spectrum. The present dip tube geometry increases the range of use under further optimal flow conditions to a volume flow ratio of 1: 7.
Weitere konstruktive Ausgestaltungen, die ihrerseits jeweils zu einer noch weitergehenden Beruhigung des Gießspiegels und damit zu einer noch weiter verbesserten Produktqualität beitragen, sind in den abhängigen Ansprüchen beschrieben.Further constructive embodiments, which in turn each contribute to an even further calming of the casting mirror and thus to a further improved product quality, are described in the dependent claims.
Der Beschreibung sind zwei Figuren beigefügt, wobei
- Figur 1
- den Tauchausguss gemäß der vorliegenden Erfindung in einer Aufrissdarstellung; und
- Figur 2
- den Tauchausguss gemäß
Figur 1 in einer Querschnittsdarstellung
- FIG. 1
- the immersion nozzle according to the present invention in an elevational view; and
- FIG. 2
- the immersion nozzle according to
FIG. 1 in a cross-sectional view
Die Erfindung wird nachfolgend in Form von Ausführungsbeispielen unter gleichzeitige Bezugnahme auf die beiden genannten Figuren detailliert beschrieben. In den Figuren sind gleiche technische Merkmale mit gleichen Bezugszeichen bezeichnet.The invention will now be described in detail in the form of embodiments with simultaneous reference to the two mentioned figures. In the figures, the same technical features are designated by the same reference numerals.
Die
Erfindungsgemäß weist der Tauchausguss eine Vielzahl von geometrischen Gestaltungsmerkmalen auf, welche im Wesentlichen alle dazu dienen, den Gießspiegel beim Einbringen von zusätzlicher Schmelze ruhig zu halten.According to the invention, the immersion nozzle has a multiplicity of geometric design features, which substantially all serve to keep the casting mirror calm when introducing additional melt.
Ein erstes dieser Gestaltungsmerkmale besteht darin, dass die der Mündung M des Längskanals 112 gegenüberliegende Mulde Mu in Form einer Rinne ausgebildet ist, deren Längsachse RL zumindest näherungsweise sowohl quer zu der Schaftachse S wie auch quer zu der Längsachse QL des Querkanals 114 verläuft. Die Mulde bremst die Geschwindigkeit der Schmelze, wenn diese aus dem vertikal verlaufenden Längskanal 112 kommend in den Querkanal 114 umgeleitet wird. Die Flussrichtung der Schmelze ist in
Der Boden B ist in Breitenrichtung, das heißt quer zur Längsachse QL des Querkanals 114 eben ausgebildet.The bottom B is flat in the width direction, ie transverse to the longitudinal axis Q L of the
Im Querschnitt entlang der Längsachse QL des Querkanals 114 gesehen, ist der Verlauf V des Bodens B sinusförmig und spiegelbildlich zur Schaftachse S ausgebildet ist, wobei der Querschnitt der Mulde Mu in dem Verlauf V ein Minimum auf Höhe der Schaftachse repräsentiert.Seen in cross-section along the longitudinal axis Q L of the
Der Verlauf V des Bodens weist rechts und links symmetrisch zu dem durch die Mulde repräsentierten Minimum jeweils ein stetig verlaufendes Maximum M1, M2 auf.The course V of the ground has on the right and left symmetrically to the minimum represented by the trough each a continuously extending maximum M1, M2.
In den beiden Abschnitten I, II zwischen den Maxima M1, M2 und seinen Auslassöffnungen 114-1, 114-2 verläuft der Querkanal 114 und sein Boden B jeweils geradlinig mit einem negativen Neigungswinkel α1, α2 gegenüber der Horizontalen und spiegelbildlich zu der Schaftachse S. Für die beiden Neigungswinkel α1, α2 gilt beispielsweise: α1 = α2 = -20°.In the two sections I, II between the maxima M1, M2 and its outlet openings 114-1, 114-2, the
Der Boden B weist im Bereich der beiden Abschnitte I, II jeweils einen Schlitz 116-1,1 116-2 in Längsrichtung QL des Querkanals 114 auf. Im Bereich der der Schaftachse S zugewandten Schmalseiten 117-1, 117-2 der Schlitze kann der Boden B mit einem Winkel β mit vorzugsweise β≈55° gegenüber der Horizontalen angefast sein. Die Schlitze 116-1, 116-2 wirken als zusätzliche beziehungsweise vergrößerte Auslassöffnungen des Querkanals 114. Durch sie wird die zusätzlich durch den Tauchausguss eingebrachte Metallschmelze in tiefere Bereiche der bereits vorhandenen Schmelze und damit weg von dem Gießspiegel geleitet; der Gießspiegel wird dadurch nicht gestört und bleibt ruhig.The bottom B has in the region of the two sections I, II in each case a slot 116-1.1 116-2 in the longitudinal direction Q L of the
Schließlich ist der Querkanal 114 vorzugsweise mit einem rechteckförmigen Querschnitt ausgebildet.Finally, the
Claims (5)
- Submerged nozzle (100) for introducing a metal melt, with air exclusion, below the meniscus of a continuous casting mould, comprising:a shaft (110) with a longitudinal channel (112), which extends along the shaft axis (S) thereof, and a transverse channel (114), which extends perpendicularly to the shaft axis (S), with at least two lateral outlet openings (114-1, 114-2);wherein the longitudinal channel (112) opens by its mouth (M) at the outlet side into the transverse channel (114);wherein the base (B) on the inner side of the transverse channel (114) has a trough (Mu) opposite the mouth of the longitudinal channel (112);wherein the course (V) of the base as seen in cross-section along the longitudinal axis (QL) of the transverse channel (114) is formed to be sinusoidal and in mirror image to the shaft axis (S), wherein the cross-section of the trough (Mu) represents a minimum in the course (V) of the base at the level of the shaft axis and wherein the course (V) of the base has a constantly extending maximum (M1, M2) respectively on the right and the left symmetrically to the minimum represented by the trough;wherein the trough (Mu) is constructed in the form of a channel, the longitudinal axis (RL) of which extends not only transversely to the shaft axis (S), but also transversely to the longitudinal axis (QL) of the transverse channel (114); andwherein the transverse channel (114) inclusive of the base (B) thereof in the two sections (I, II) between the maxima (M1, M2) in the base and its lateral outlet openings is formed in each instance rectilinearly with a negative angle of inclination α1, α2 relative to the horizontal and in mirror image to the shaft axis (S),characterised in that the base (B) of the transverse channel (114) in each of the two sections (I, II) between its two maxima (M1, M2) and the lateral outlet openings (114-1, 114-2) of the transverse channel has a respective slot (116-1, 116-2), wherein the slots function as additional outlet openings for the transverse channel.
- Submerged nozzle (100) according to claim 1, characterised in that the base (B) is formed to be planar transversely to the longitudinal axis (QL) of the transverse channel.
- Submerged nozzle (100) according to claim 1 or 2, characterised in that for the angle of inclination α1, α2, there applies: α1 = α2 ≈ -20°.
- Submerged nozzle (100) according to any one of the preceding claims, characterised in that the base (B) is chamfered in the region of the narrow side of the slot, for example at an angle β of 55° relative to the horizontal.
- Submerged nozzle (100) according to any one of the preceding claims, characterised in that the transverse channel (114) has a rectangular cross-section.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL07016955T PL1900460T3 (en) | 2006-09-18 | 2007-08-30 | Submerged multi nozzle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006044350A DE102006044350A1 (en) | 2006-09-18 | 2006-09-18 | Multi-submerged nozzle |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1900460A1 EP1900460A1 (en) | 2008-03-19 |
EP1900460B1 true EP1900460B1 (en) | 2010-07-28 |
Family
ID=38895732
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07016955A Active EP1900460B1 (en) | 2006-09-18 | 2007-08-30 | Submerged multi nozzle |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1900460B1 (en) |
AT (1) | ATE475501T1 (en) |
DE (2) | DE102006044350A1 (en) |
ES (1) | ES2348892T3 (en) |
PL (1) | PL1900460T3 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008048025A1 (en) | 2008-09-19 | 2010-03-25 | Sms Siemag Aktiengesellschaft | Dip tube for introduction of molten metal such as fluid steel material under air exclusion under the meniscus of strand casting mold, comprises a shaft in which a longitudinal channel runs along the shaft longitudinal axis |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3839214A1 (en) | 1988-11-19 | 1990-05-23 | Schloemann Siemag Ag | Method and apparatus for introducing metal melt into a slab mould |
-
2006
- 2006-09-18 DE DE102006044350A patent/DE102006044350A1/en not_active Withdrawn
-
2007
- 2007-08-30 DE DE502007004543T patent/DE502007004543D1/en active Active
- 2007-08-30 AT AT07016955T patent/ATE475501T1/en active
- 2007-08-30 EP EP07016955A patent/EP1900460B1/en active Active
- 2007-08-30 PL PL07016955T patent/PL1900460T3/en unknown
- 2007-08-30 ES ES07016955T patent/ES2348892T3/en active Active
Also Published As
Publication number | Publication date |
---|---|
ATE475501T1 (en) | 2010-08-15 |
DE102006044350A1 (en) | 2008-03-27 |
PL1900460T3 (en) | 2011-01-31 |
EP1900460A1 (en) | 2008-03-19 |
DE502007004543D1 (en) | 2010-09-09 |
ES2348892T3 (en) | 2010-12-16 |
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