EP0746434B1 - Process and device for cooling molten steel - Google Patents
Process and device for cooling molten steel Download PDFInfo
- Publication number
- EP0746434B1 EP0746434B1 EP95910398A EP95910398A EP0746434B1 EP 0746434 B1 EP0746434 B1 EP 0746434B1 EP 95910398 A EP95910398 A EP 95910398A EP 95910398 A EP95910398 A EP 95910398A EP 0746434 B1 EP0746434 B1 EP 0746434B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- strand
- steel
- steel strand
- speed
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 30
- 239000010959 steel Substances 0.000 title claims abstract description 30
- 238000001816 cooling Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims description 53
- 239000011261 inert gas Substances 0.000 claims description 11
- 238000005266 casting Methods 0.000 claims description 8
- 238000007711 solidification Methods 0.000 claims description 5
- 230000008023 solidification Effects 0.000 claims description 5
- 239000000155 melt Substances 0.000 claims description 4
- 238000009749 continuous casting Methods 0.000 abstract description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 229910001338 liquidmetal Inorganic materials 0.000 description 6
- 229910052786 argon Inorganic materials 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000003570 air Substances 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007704 transition Effects 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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0631—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a travelling straight surface, e.g. through-like moulds, a belt
-
- 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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/0697—Accessories therefor for casting in a protected atmosphere
-
- 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
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
Definitions
- the invention relates to a method for cooling molten liquid produced by strip casting Steel, in which at least part of a metal nozzle of a metallurgical vessel emerging melt solidifies by contact with a cooling surface, a one reducing atmosphere forming gas stream or an inert gas stream, on the surface of the freely accessible liquid steel strand immediately after leaving the metal nozzle of the metallurgical vessel, and the strand surface at least up to complete solidification of this gas atmosphere is exposed, as well as a device to carry out the procedure.
- inert gas is proposed in the production of steel blanks by continuously pouring a metal jet into a cooled mold at the upper part of the mold near the surface of the liquid metal above the metal.
- Nitrogen or argon is proposed, which is previously liquefied by compressing and lowering the temperature and is applied in the liquefied state to the surface of the steel blank. From this document it is only known to expose liquid metal to an inert gas atmosphere and to set up the gas jet in such a way that the liquid metal of the pipe body is rotated about a vertical axis.
- the gas used here is introduced into the housing in an undirected manner and is used exclusively for cooling and usually to reduce scale formation.
- the inert gas was brought into contact with either the liquid or the already solidified surface.
- belt casting as is known, for example, from DE 38 10 302, the liquid metal is placed on a cooled endless belt and the free surface of the belt strand cools down during transport on the conveyor belt, so that the free surface is still near the nozzle in the front area is liquid and then solidifies by cooling.
- the invention has set itself the goal of a method and a to create appropriate device with the influence on the Surface of the metallic strand material both on its shape and on its quality is taken.
- a gas stream is released onto the surface of the accessible liquid steel strand immediately after leaving it the metal nozzle of the metallurgical vessel.
- the Strand surface at least until the complete solidification of the Steel strand exposed to a gas that creates an inert atmosphere forms.
- inert gases such as argon or Nitrogen.
- the gas in an amount and a rate in such a way to guide the surface of the steel strand that influence is taken on the shape of the casting strand.
- it can Surface pressed in and the entire strand for example, the profile can be given in the form of a crown.
- the gas can also be controlled in such a way that it complements the gas kinetics has a positive influence in reducing the formation of bumps.
- FIG. 1 shows a metallurgical vessel 11, in which a Metal nozzle 12 flows out of a molten metal M.
- the melt M is guided on a conveyor belt 43, which as Endless belt of a drive drum 41 and a deflection drum 42 is held.
- a cooling device 44 is provided, which the steel strand S, which in Direction of conveyance s is transported, cools.
- the metal strand S is surrounded by a housing 31, of which it is Outlet 32 surrounded by a seal 33 to minimize gas leakage is.
- Gas nozzles 25 are passed through the ceiling of the housing 31. This Nozzles 25 have an angle between 0 and 45 ° on. These gas nozzles 25 are connected to gas distributors 26 which are connected to a compressor 21 via feed lines 23. The Gas nozzles 25 can be shut off individually by shut-off elements 24.
- a heat exchanger 22 is located between the compressor 21 and the nozzles 25 arranged with which the temperature of a reduced atmosphere forming gas or the inert gas can be predetermined.
- the compressor 21 is connected to a gas supply station 29.
- a connecting line 28 is provided, which Gas supply station 29 via a gas manifold 27 with the Housing 31 connects in the area of the strand exit 32.
- FIG. 2 shows how using identical position digits
- Figure 1 shows a cross section through a strip caster. Is shown the arrangement of several gas nozzles 25 side by side, each one Have shut-off device 24 and are connected to a distributor 25, which has the lead 23.
- a seal 34 is provided in the upper region of the deflection drum 42, which the Lekagen between the side cheeks of the housing 31 and the Side shields of drum 42 minimized.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Furnace Details (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Kühlen schmelzflüssigen durch Bandgießen erzeugten Stahles, bei dem mindestens ein Teil der aus einer Metalldüse eines metallurgischen Gefäßes austretenden Schmelze durch Kontakt mit einer Kühlfläche erstarrt, wobei ein eine reduzierende Atmosphäre bildender Gasstrom oder ein Inertgasstrom, auf die Oberfläche des frei zugänglichen flüssigen Stahlstranges unmittelbar nach seinem Verlassen der Metalldüse des metallurgischen Gefäßes geleitet, und die Strangoberfläche mindestens bis zum vollständigen Durcherstarren dieser Gasatmosphäre ausgesetzt wird, sowie eine Vorrichtung zur Durchführung des Verfahren.The invention relates to a method for cooling molten liquid produced by strip casting Steel, in which at least part of a metal nozzle of a metallurgical vessel emerging melt solidifies by contact with a cooling surface, a one reducing atmosphere forming gas stream or an inert gas stream, on the surface of the freely accessible liquid steel strand immediately after leaving the metal nozzle of the metallurgical vessel, and the strand surface at least up to complete solidification of this gas atmosphere is exposed, as well as a device to carry out the procedure.
Beim kontinuierlichen Gießen oder Stranggießen wird das flüssige Metall in eine gekühlte Form geführt, wobei sich durch den Kontakt mit der Kühlform eine Erstarrungsfront von außen beginnend zum Inneren des Stranges ausbildet Zur Verbesserung der Qualität der Metallrohlinge ist bekannt, diesen ein inertes Gas zuzuführen.With continuous casting or continuous casting, the liquid metal is cooled led, with the contact with the cooling mold a solidification front from the outside starting to train inside to improve the quality of the Metal blanks are known to supply an inert gas to them.
So wird in der DE OS 21 63 928 vorgeschlagen bei der Herstellung von Stahlrohlingen durch
kontinuierliche Gießen eines Metallstrahls in eine gekühlte Form am oberen Teil der Form in
der Nähe der Oberfläche des flüssigen Metalls über dem Metall inertes Gas einzufahren
Vorgeschlagen wird hierbei Stickstoff oder Argon, welches vorher durch Komprimieren und
Absenken der Temperatur verflüssigt wird und in
verflüssigtem Zustand auf die Oberfläche des Stahlrohlings aufgebracht
wird.
Aus dieser Schrift ist es lediglich bekannt, flüssiges Metall einer
Inertgasatmosphäre auszusetzen und den Gasstrahl so einzurichten, daß
das flüssige Metall des Rohrlings in eine Drehbewegung um eine
senkrechte Achse versetzt wird.In DE OS 21 63 928, for example, in the production of steel blanks by continuously pouring a metal jet into a cooled mold at the upper part of the mold near the surface of the liquid metal above the metal, inert gas is proposed. Nitrogen or argon is proposed, which is previously liquefied by compressing and lowering the temperature and is applied in the liquefied state to the surface of the steel blank.
From this document it is only known to expose liquid metal to an inert gas atmosphere and to set up the gas jet in such a way that the liquid metal of the pipe body is rotated about a vertical axis.
Aus der Schrift DE 32 27 132 A1 ist es bekannt, einen aus einer
Zumeßdüse austretenden Metallstrom in einen Schutzmantel aus inertem
Gas, z. B. Argon oder Stickstoff einzuhüllen, um Luft von der Nähe der
Metallschmelze fernzuhalten. Dieses unter Druck stehende inerte Gas
schirmt den aus der Umgebungsluft stammenden Sauerstoff ab und
verhindert dadurch eine Reoxidierung des freiliegenden
Metallschmelzen-Miniskus. Eine weitergehende Beeinflussung des
flüssigen Metalls entnimmt der Fachmann dieser Schrift nicht.
Weiterhin ist der Einsatz inerten Gases zur Behandlung bereits
erstarrter oder nur erwärmter metallischer Stränge oder Drähte bekannt.
Erwähnt sei hier beispielsweise die Schrift DE 35 06 597A1, bei der ein
Draht in einem Gehäuse einer Kühlkolonne einem leicht reduzierenden Gas
ausgesetzt wird. Das hier eingesetzte Gas wird ungerichtet in das
Gehäuse eingeführt und dient ausschließlich der Kühlung und
üblicherweise der Verminderung einer Zunderbildung.
Bei den zitierten Gießverfahren wurde das inerte Gas entweder mit der
flüssigen oder der bereits erstarrten Oberfläche in Kontakt gebracht.
Beim Bandgießen, wie es etwa aus der Schrift DE 38 10 302 bekannt ist,
wird das Flüssigmetall auf ein gekühles Endlosband aufgegeben und die
freie Oberfläche des Bandstranges kühlt während seines Transportes auf
dem Förderband ab, so daß im vorderen Bereich in Düsennähe die freie
Oberfläche noch flüssig ist und danach durch Abkühlung erstarrt. From the document DE 32 27 132 A1 it is known that a metal stream emerging from a metering nozzle in a protective jacket made of inert gas, for. B. envelop argon or nitrogen to keep air away from the vicinity of the molten metal. This pressurized inert gas shields the oxygen from the ambient air and thereby prevents re-oxidation of the exposed molten metal miniscus. The person skilled in the art does not take any further influence on the liquid metal from this document. Furthermore, the use of inert gas for the treatment of solidified or only heated metallic strands or wires is known. For example, the document DE 35 06 597A1 should be mentioned, in which a wire in a housing of a cooling column is exposed to a slightly reducing gas. The gas used here is introduced into the housing in an undirected manner and is used exclusively for cooling and usually to reduce scale formation.
In the casting processes cited, the inert gas was brought into contact with either the liquid or the already solidified surface. In the case of belt casting, as is known, for example, from DE 38 10 302, the liquid metal is placed on a cooled endless belt and the free surface of the belt strand cools down during transport on the conveyor belt, so that the free surface is still near the nozzle in the front area is liquid and then solidifies by cooling.
Aus dem gattungsbildenden JP-Abstract vol.10, no.195 (M-497) & JP-A-61-038747 ist ein
Verfahren bekannt, bei dem schmelzflüssiger Stahl durch Kontakt mit einer Kühlzone
erstarrt, wobei ein eine reduzierende Atmosphäre bildender Gasstrom auf die Oberfläche
eines frei zugänglichen flüssigen Stahlstranges unmittelbar nach Verlassen der Düse geleitet
wird, und zwar bis zu dessen Durcherstarrung.
Hieraus ist auch eine Vorrichtung zum Stranggießen bekannt, bei der ein Gefäß zur
Aufnahme der Schmelze eine Düse aufweist, über die die Schmelze einer mindestens eine
Seite des Stahlstranges berührenden Kühlform zuführbar ist. From the generic JP abstract vol.10, no.195 (M-497) & JP-A-61-038747, a method is known in which molten steel solidifies by contact with a cooling zone, a gas stream forming a reducing atmosphere being generated the surface of a freely accessible liquid steel strand is passed immediately after leaving the nozzle, until it solidifies.
From this, a device for continuous casting is also known, in which a vessel for receiving the melt has a nozzle through which the melt can be fed to a cooling mold touching at least one side of the steel strand.
Die Erfindung hat sich das Ziel gesetzt, ein Verfahren und eine entsprechende Vorrichtung zu schaffen, mit der Einfluß auf die Oberfläche des metallischen Stranggutes sowohl auf seine Form wie auf seine Qualität genommen wird.The invention has set itself the goal of a method and a to create appropriate device with the influence on the Surface of the metallic strand material both on its shape and on its quality is taken.
Die Erfindung erreicht dieses Ziel durch die kennzeichnenden Merkmale der Ansprüche 1 und 11.The invention achieves this aim by the characteristic features of claims 1 and 11.
Erfindungsgemäß wird ein Gasstrom auf die Oberfläche des frei zugänglichen flüssigen Stahlstranges unmittelbar nach seinem Verlassen der Metalldüse des metallurgischen Gefäßes geleitet. Dabei wird die Strangoberfläche mindestens bis zum vollständigen Durcherstarren des Stahlstranges einem Gas ausgesetzt, das eine inerte Atmosphäre bildet. Neben der Möglichkeit des Einsatzes von sauerstoffarmen Gasen wie Rauchgas kommen hier insbesondere inerte Gase wie Argon oder Stickstoff zum Einsatz. According to the invention, a gas stream is released onto the surface of the accessible liquid steel strand immediately after leaving it the metal nozzle of the metallurgical vessel. The Strand surface at least until the complete solidification of the Steel strand exposed to a gas that creates an inert atmosphere forms. In addition to the possibility of using low-oxygen gases inert gases such as argon or Nitrogen.
Gemäß der Erfindung wird vorgeschlagen, das Gas in einer Menge und einer Geschwindigkeit in der weise auf die Oberfläche des Stahlstranges zu leiten, daß Einfluß auf die Form des Gießstranges genommen wird. Zum einen kann die Oberfläche gezielt eingedrückt werden und dem Gesamtstrang beispielsweise das Profil in Form einer Bombierung gegeben werden. Das Gas kann aber auch so gesteuert werden, das die Gaskinetik ergänzend einen positiven Einfluß bei der Verminderung einer Beulenbildung nimmt. According to the invention it is proposed to use the gas in an amount and a rate in such a way to guide the surface of the steel strand that influence is taken on the shape of the casting strand. For one, it can Surface pressed in and the entire strand for example, the profile can be given in the form of a crown. The gas can also be controlled in such a way that it complements the gas kinetics has a positive influence in reducing the formation of bumps.
Durch den Einsatz dieser Gase wird intensiv Einfluß auf die Oberfläche des Stahlstranges genommen, und zwar sowohl im flüssigen Bereich, wie im erstarrten Bereich, als auch im Übergangsbereich flüssig/fest. Zum einen wird hierdurch jegliche Verzunderung vermieden. Darüber hinaus wird durch den Einsatz des Gases in Düsennähe gezielt die Wärmeabfuhr und die Oberflächenspannung beeinflußt. In Abhängigkeit der gewünschten Qualität des Stahlstranges bzw. des Stahlbandes schlagen die Erfinder vor, das Gas entweder zu erhitzen und hierdurch ein Erstarren der Strangoberfläche für eine vorgebbare Strecke zu verhindern, oder in einer anderen Ausführungsform, das Gas soweit abzukühlen, daß es in flüssiger Form gefördert wird. In beiden extremen Bereichen kann die Temperatur des Gases vorggebar geführt werden. Selbstverständlich kann das Gas auch bei Raumtemperatur eingesetzt werden. The use of these gases intensively influences the surface taken of the steel strand, both in the liquid area, as in solidified area, as well as liquid / solid in the transition area. On the one hand this will avoid any scaling. Beyond that through the use of the gas near the nozzle, the heat dissipation and the Surface tension affected. Depending on the desired quality of the steel strand or steel strip, the inventors propose that To either heat the gas and thereby freeze the To prevent strand surface for a predetermined distance, or in another embodiment, the gas to cool so far that it in is promoted in liquid form. In both extreme areas, the Temperature of the gas can be pre-routed. Of course you can the gas can also be used at room temperature.
Ein Beispiel der Erfindung ist in der beiliegenden Zeichnung dargelegt. Dabei zeigt die
- Figur 1
- schematisch einen Längsschnitt durch die Gießanlage
- Figur 2
- schematisch einen Querschnitt.
- Figure 1
- schematically a longitudinal section through the casting plant
- Figure 2
- schematically a cross section.
Die Figur 1 zeigt ein metallurgisches Gefäß 11, bei dem aus einer
Metalldüse 12 eine Metallschmelze M ausströmt.FIG. 1 shows a metallurgical vessel 11, in which a
Die Schmelze M wird auf ein Transportband 43 geführt, welches als
Endlosband von einer Antriebstrommel 41 und einer Umlenktrommel 42
gehalten wird. Auf der Unterseite des Obertrumms des Transportbandes 43
ist eine Kühleinrichtung 44 vorgesehen, die den Stahlstrang S, der in
Förderrichtung s transportiert wird, kühlt.The melt M is guided on a
Der Metallstrang S ist von einer Einhausung 31 umgeben, von der er am
Austritt 32 durch eine Dichtung 33 zur Minimierung der Gaslekage umgeben
ist.The metal strand S is surrounded by a
Durch die Decke der Einhausung 31 sind Gasdüsen 25 durchgeführt. Diese
Düsen 25 weisen gegenüber dem Stahlstrang S einen Winkel zwischen 0 und
45 ° auf. Diese Gasdüsen 25 sind an Gasverteiler 26 angeschlossen, die
über Zuleitungen 23 mit einem Verdichter 21 in Verbindung stehen. Die
Gasdüsen 25 sind durch Absperrorgane 24 einzeln absperrbar.
Zwischen dem Verdichter 21 und den Düsen 25 ist ein Wärmetauscher 22
angeordnet, mit dem die Temperatur des eine reduzierte Atmosphäre
bildenden Gases bzw. des Inertgases vorgebbar einstellbar ist.
Der Verdichter 21 ist an eine Gasversorgungsstation 29 angeschlossen.
In der Figur 1 ist eine Verbindungsleitung 28 vorgesehen, die die
Gasversorgungsstation 29 über eine Gassammelleitung 27 mit der
Einhausung 31 im Bereich des Strangaustrittes 32 verbindet.A
Die Figur 2 zeigt unter Verwendung identischer Positionsziffern wie
Figur 1 einen Querschnitt durch eine Bandgießanlage. Dargestellt ist
die Anordnung mehrerer Gasdüsen 25 nebeneinander, die jeweils ein
Absperrorgan 24 aufweisen und an einen Verteiler 25 angeschlossen sind,
der die Zuleitung 23 aufweist.FIG. 2 shows how using identical position digits
Figure 1 shows a cross section through a strip caster. Is shown
the arrangement of
Im oberen Bereich der Umlenktrommel 42 ist eine Dichtung 34 vorgesehen,
die die Lekagen zwischen den Seitenwangen der Einhausung 31 und den
Seitenschildern der Trommel 42 minimiert. A
- 1010th
- MetallzuführungMetal feeder
- 1111
- metallurgisches Gefäßmetallurgical vessel
- 1212th
- MetalldüseMetal nozzle
- 2020th
- GaszuführungGas supply
- 2121
- Verdichtercompressor
- 2222
- WärmetauscherHeat exchanger
- 2323
- ZuleitungSupply
- 2424th
- AbsperrorganShut-off device
- 2525th
- GasdüseGas nozzle
- 2626
- VerteilerDistributor
- 2727
- GassammelleitungGas manifold
- 2828
- VerbindungsleitungConnecting line
- 2929
- GasversorgungsstationGas supply station
- 3030th
- GasatmosphäreGas atmosphere
- 3131
- EinhausungEnclosure
- 3232
- Austritt StrangExit strand
- 3333
- Dichtung (32)Gasket (32)
- 3434
- Dichtung (42)Gasket (42)
- 4040
- GießmaschineCasting machine
- 4141
- AntriebstrommelDrive drum
- 4242
- UmlenktrommelDeflection drum
- 4343
- TransportbandConveyor belt
- 4444
- KühleinrichtungCooling device
- SS
- MetallstrangMetal strand
- ss
- FörderrichtungDirection of conveyance
- MM
- Schmelzemelt
Claims (12)
- Method for cooling molten steel produced by strip casting, in which at least some of the melt emerging from a metal nozzle of a metallurgical vessel solidifies through contact with a cooling surface, wherein a gas stream creating a reducing atmosphere or an inert gas stream is directed onto the surface of the freely accessible liquid steel strand immediately after it leaves the metal nozzle of the metallurgical vessel, and the strand surface is exposed to this gaseous atmosphere at least until it has completely solidified right through,
characterised in that the gas strikes the surface of the steel strand at an angle which is greater than 0 and smaller than 50°, and that the gas strikes the surface of the steel strand in a quantity which is so great and at a speed which is so high that the strand is indented at the surface while undergoing a reduction in cross section. - Method according to claim 1,
characterised in that the temperature of the gas is controlled such that it can be preset. - Method according to claim 2,
characterised in that the gas is heated to a temperature which prevents the strand surface from solidifying for a while. - Method according to claim 3,
characterised in that the hot gas is applied to the strand surface in the strand conveying direction in a region in which the solidification contour commencing on the opposite side has not yet penetrated the strand in the thickness direction. - Method according to claim 2,
characterised in that the gas is cooled to an extent such that it is conveyed in liquid form. - Method according to claim 5,
characterised in that, in order to reduce the surface tension of the steel strand, the gas is applied to the latter at an impact speed corresponding approximately to the strand withdrawal speed and at an angle of < 10°. - Method according to claim 1,
characterised in that the gas stream is controlled such that a speed and pressure profile is obtained in the direction transversely to the direction in which the steel strand is conveyed. - Method according to claim 7,
characterised in that the speed and pressure profile has the shape of a bow. - Device for continuously casting steel, in particular metal strips, with a vessel comprising a metal nozzle via which melt can be conveyed to a cooling mould contacting at least one side of the steel strand, for carrying out the method according to claim 1,
characterised in that a housing (31) is provided which encases the steel strand (S) in the region up to its complete solidification right through, that gas nozzles (25) are arranged inside the housing in the strand conveying direction (s) parallel to the metal nozzle (12) of the vessel (11) and at least in the immediate vicinity of this nozzle, which nozzles (25) are connected to a gas supply station (29) and are at an angle of between 0 and 45° with respect to the steel strand (S), that the housing (31) comprises substantially at the strand exit opening (32) a seal (33) which minimises gas leakages, and that the number and the arrangement of the gas nozzles (25) in the strand conveying direction (s) and in the strand width direction are determined in accordance with the desired gas volume and/or the gas exit speed onto the steel strand. - Device according to claim 9,
characterised in that a heat exchanger is provided between the gas supply station (29) and the gas nozzles (25). - Device according to claim 9,
characterised in that a compressor (21) is connected to the supply station. - Device according to claim 9,
characterised in that a gas collecting main (27) is provided at the housing (31) at the strand exit end (32) and is connected to the gas supply station (29) for the gas.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4407873 | 1994-03-04 | ||
| DE4407873A DE4407873C2 (en) | 1994-03-04 | 1994-03-04 | Method and device for cooling molten steel |
| PCT/DE1995/000196 WO1995023661A1 (en) | 1994-03-04 | 1995-02-10 | Process and device for cooling molten steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0746434A1 EP0746434A1 (en) | 1996-12-11 |
| EP0746434B1 true EP0746434B1 (en) | 1998-12-30 |
Family
ID=6512282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95910398A Expired - Lifetime EP0746434B1 (en) | 1994-03-04 | 1995-02-10 | Process and device for cooling molten steel |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US5836377A (en) |
| EP (1) | EP0746434B1 (en) |
| JP (1) | JP3016594B2 (en) |
| KR (1) | KR100295950B1 (en) |
| CN (1) | CN1046447C (en) |
| AT (1) | ATE175136T1 (en) |
| AU (1) | AU679342B2 (en) |
| BR (1) | BR9506980A (en) |
| CA (1) | CA2184719C (en) |
| DE (1) | DE4407873C2 (en) |
| RU (1) | RU2122919C1 (en) |
| WO (1) | WO1995023661A1 (en) |
| ZA (1) | ZA951664B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010063093A1 (en) | 2010-12-15 | 2012-06-21 | Sms Siemag Ag | Device and method for horizontal strip casting |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19811434C2 (en) * | 1998-03-17 | 2002-05-16 | Mannesmann Ag | Method and device for uniformizing a molten metal film |
| DE19823440C1 (en) * | 1998-05-19 | 1999-12-09 | Mannesmann Ag | Method and device for the near-dimensional casting of metal |
| US6527043B2 (en) * | 2001-05-01 | 2003-03-04 | Antaya Technologies Corporation | Apparatus for casting solder on a moving strip |
| ITMI20021506A1 (en) * | 2002-07-10 | 2004-01-12 | Danieli Off Mecc | BELT TEMPERATURE ADJUSTMENT DEVICE IN A METAL BELT CONTINUOUS CASTING SYSTEM |
| KR100537429B1 (en) * | 2003-05-13 | 2005-12-19 | 한국기계연구원 | Apparatus for manufacturing the plate of magnesium alloys by wheel-band continuous casting, and manufacturing method thereof |
| US7451804B2 (en) * | 2006-11-22 | 2008-11-18 | Peterson Oren V | Method and apparatus for horizontal continuous metal casting in a sealed table caster |
| DE102009031236B3 (en) * | 2009-06-26 | 2010-12-02 | Salzgitter Flachstahl Gmbh | Producing steel strip by strip casting, comprises placing metal melt from feed vessel to rotating casting strip of horizontal strip casting system by casting groove and siphon-like outlet area formed as casting nozzle under protective gas |
| DE102017103046A1 (en) | 2017-02-15 | 2018-08-16 | Salzgitter Flachstahl Gmbh | Horizontal strip caster with optimized casting atmosphere |
| DE102017104279A1 (en) * | 2017-03-01 | 2018-09-06 | Salzgitter Flachstahl Gmbh | Horizontal strip caster with optimized cooling |
| DE102017105570A1 (en) | 2017-03-15 | 2018-09-20 | Salzgitter Flachstahl Gmbh | Horizontal strip caster with optimized casting belt |
| CN110355339B (en) * | 2019-07-26 | 2024-03-26 | 武汉高智达连铸智能科技有限公司 | Device and method for removing iron scales at tail end of sector section |
| CN113245528B (en) * | 2021-05-11 | 2025-07-25 | 大连交通大学 | Vacuum liquid continuous rheological extrusion complete equipment and forming method |
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| JPS59150646A (en) * | 1983-02-17 | 1984-08-28 | Kawasaki Steel Corp | Method and device for continuous casting of metallic plate |
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| JPS60199552A (en) * | 1984-03-23 | 1985-10-09 | Nippon Steel Corp | Production of thin metallic strip |
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| GB8426804D0 (en) * | 1984-10-23 | 1984-11-28 | Ciba Geigy Ag | Pyridazinones preparations |
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| BE1000490A4 (en) * | 1987-04-22 | 1988-12-27 | O C C Company Ltd | concasting of strip or wire to produce mono-directional grain growth - by heating support substrate to above metal m.pt. prior to flowing metal onto support, preventing nuclei growth between support and metal |
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1994
- 1994-03-04 DE DE4407873A patent/DE4407873C2/en not_active Revoked
-
1995
- 1995-02-10 AU AU17535/95A patent/AU679342B2/en not_active Ceased
- 1995-02-10 BR BR9506980A patent/BR9506980A/en not_active IP Right Cessation
- 1995-02-10 CA CA002184719A patent/CA2184719C/en not_active Expired - Fee Related
- 1995-02-10 AT AT95910398T patent/ATE175136T1/en active
- 1995-02-10 KR KR1019960704524A patent/KR100295950B1/en not_active Expired - Fee Related
- 1995-02-10 JP JP7522613A patent/JP3016594B2/en not_active Expired - Fee Related
- 1995-02-10 EP EP95910398A patent/EP0746434B1/en not_active Expired - Lifetime
- 1995-02-10 US US08/702,503 patent/US5836377A/en not_active Expired - Lifetime
- 1995-02-10 WO PCT/DE1995/000196 patent/WO1995023661A1/en not_active Ceased
- 1995-02-10 RU RU96120164A patent/RU2122919C1/en not_active IP Right Cessation
- 1995-02-10 CN CN95191938A patent/CN1046447C/en not_active Expired - Fee Related
- 1995-02-28 ZA ZA951664A patent/ZA951664B/en unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010063093A1 (en) | 2010-12-15 | 2012-06-21 | Sms Siemag Ag | Device and method for horizontal strip casting |
| WO2012080191A1 (en) | 2010-12-15 | 2012-06-21 | Sms Siemag Ag | Device and method for the horizontal casting of metal strips |
| DE102010063093B4 (en) | 2010-12-15 | 2023-07-06 | Sms Group Gmbh | Device and method for horizontal casting of metal strips |
Also Published As
| Publication number | Publication date |
|---|---|
| US5836377A (en) | 1998-11-17 |
| EP0746434A1 (en) | 1996-12-11 |
| DE4407873A1 (en) | 1995-09-07 |
| CN1143340A (en) | 1997-02-19 |
| AU1753595A (en) | 1995-09-18 |
| ATE175136T1 (en) | 1999-01-15 |
| WO1995023661A1 (en) | 1995-09-08 |
| CA2184719A1 (en) | 1995-09-08 |
| BR9506980A (en) | 1997-09-16 |
| CA2184719C (en) | 2005-05-10 |
| CN1046447C (en) | 1999-11-17 |
| JPH09511451A (en) | 1997-11-18 |
| DE4407873C2 (en) | 1997-04-10 |
| RU2122919C1 (en) | 1998-12-10 |
| ZA951664B (en) | 1996-02-09 |
| AU679342B2 (en) | 1997-06-26 |
| KR100295950B1 (en) | 2001-10-24 |
| JP3016594B2 (en) | 2000-03-06 |
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