EP1163964B1 - Device for introducing a treatment agent, particularly a gaseous treatment agent, in a vessel filled with molten metal - Google Patents

Device for introducing a treatment agent, particularly a gaseous treatment agent, in a vessel filled with molten metal

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Publication number
EP1163964B1
EP1163964B1 EP01113868A EP01113868A EP1163964B1 EP 1163964 B1 EP1163964 B1 EP 1163964B1 EP 01113868 A EP01113868 A EP 01113868A EP 01113868 A EP01113868 A EP 01113868A EP 1163964 B1 EP1163964 B1 EP 1163964B1
Authority
EP
European Patent Office
Prior art keywords
rods
inner tube
reinforcement
treatment agent
introducing
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
Application number
EP01113868A
Other languages
German (de)
French (fr)
Other versions
EP1163964A1 (en
Inventor
Clemens Fischer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jankowski & Co KG GmbH
Original Assignee
Jankowski & Co KG GmbH
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Filing date
Publication date
Application filed by Jankowski & Co KG GmbH filed Critical Jankowski & Co KG GmbH
Publication of EP1163964A1 publication Critical patent/EP1163964A1/en
Application granted granted Critical
Publication of EP1163964B1 publication Critical patent/EP1163964B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4606—Lances or injectors
    • C21C5/4613—Refractory coated lances; Immersion lances
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B22D1/002—Treatment with gases
    • B22D1/005—Injection assemblies therefor

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Chemical Vapour Deposition (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

Apparatus for introducing a gaseous treating medium into a container filled with liquid metal comprises a metallic inner tube (1) with a metal casing (5) to secure a refractory jacket (4) penetrated by an outlet channel. The casing consists of at least two corrugated rods (6) having a rounded outer cross-section fixed to the inner tube. Preferred Features: The corrugated rods are formed as a helix and have a circular or oval cross-section. The rods are hollow and are shrunk onto the inner tube.

Description

Die Erfindung bezieht sich auf eine Vorrichtung zum Einleiten eines insbesondere gasförmigen Behandlungsmediums in einen mit flüssigem Metall gefüllten Behälter, bestehend aus einem metallischen Innenrohr mit einer Armierung aus Metall zur Sicherung einer von mindestens einem Austrittskanal durchdrungenen, feuerfesten Ummantelung.The invention relates to a device for introducing a particular gaseous treatment medium into a container filled with liquid metal, consisting of a metallic inner tube with a reinforcement made of metal for securing a penetrated by at least one outlet channel, refractory sheath.

Eine derartige Vorrichtung, die auch als Tauchlanze bezeichnet wird, ist aus der EP-PS 0 261 365 bekannt. Mit dieser Vorrichtung werden Behandlungsmedien, wie Gase, insbesondere inerte Gase und/oder Trägergase mit Feststoffen, beispielsweise schlackenbildende Stoffe und Kohlenstoff, in das flüssige Metall eingeleitet. Bei dieser bekannten Vorrichtung ist die auf dem Innenrohr befestigte Armierung aus Metall aus mindestens einem schraubenlinienförmig aufgewickelten Rippenband gebildet, welches rechtwinkligen Querschnitt aufweist und hochkant zur Längsachse des Innenrohres angeordnet ist. Bei einer derartig ausgebildeten Armierung besteht, insbesondere durch den Querschnitt des Rippenbandes bedingt, die Gefahr einer Kerbwirkung. Dies bedeutet, dass - von den Ecken des Rippenbandes ausgehend - Kerben bzw. Risse in der feuerfesten Ummantelung entstehen können, durch die die Vorrichtung entweder unbrauchbar bzw. deren Standzeit erheblich reduziert wird. Zwischen dem Rippenband und derSuch a device, which is also referred to as an immersion lance, is known from EP-PS 0 261 365. With this device treatment media, such as gases, in particular inert gases and / or carrier gases with solids, such as slag-forming substances and carbon, are introduced into the liquid metal. In this known device, the reinforcing metal fastened on the inner tube is formed from at least one helically wound ribbed band, which has a rectangular cross-section and is arranged edgewise to the longitudinal axis of the inner tube. In a reinforcement formed in this way, in particular due to the cross section of the ribbed belt, the risk of a notch effect. This means that - starting from the corners of the ribbed belt - notches or cracks in the refractory shell can occur, by which the device either useless or their life is significantly reduced. Between the ribbed tape and the

Ummantelung findet darüber hinaus keine innige Verankerung statt. Dies bringt es mit sich, dass durch die kühlere Temperatur eines im Innenrohr strömenden Behandlungsmediums über das Rippenband keine nennenswerte Abkühlung der feuerfesten Ummantelung stattfinden kann.Sheathing, moreover, is not intimately anchored. This entails that due to the cooler temperature of a treatment medium flowing in the inner tube, no appreciable cooling of the refractory casing can take place via the ribbed belt.

Aus der Druckschrift GB 2 101 724 geht weiterhin eine metallurgische Blaslanze hervor, wobei die Blaslanze aus einem rohrförmigen Teil für den Durchfluss eines Gases oder eines Gemisches aus Gasen und Feststoffen besteht, welches in einer Hülle aus feuerfestem Material eingebettet ist, wobei Anordnungen vorgesehen sind, um die feuerfeste Hülle am rohrförmigen Teil festzuhalten, wobei um das rohrförmige Teil eine Anzahl von verstärkungsstäben oder Verstärkungsrohren angeordnet sind, welche sich parallel zum rohrförmigen Teil erstrecken.GB 2 101 724 also discloses a metallurgical lance, the lance consisting of a tubular member for the passage of a gas or a mixture of gases and solids embedded in a shell of refractory material, with arrangements being provided. to hold the refractory sheath to the tubular part, wherein around the tubular part a number of reinforcing bars or reinforcing tubes are arranged, which extend parallel to the tubular part.

Weiterhin ist aus der australischen Patentschrift AU 20 822 70 bekannt, eine Kühllanze mit einem Metallrohr vorzusehen, wobei um das Metallrohr herum angeordnet eine Mehrzahl weiterer Rohre zur Kühlung der Lanze vorgesehen sind.Furthermore, from Australian patent AU 20 822 70 it is known to provide a cooling lance with a metal tube, wherein a plurality of further tubes are provided around the metal tube for cooling the lance.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zum Einleiten eines insbesondere gasförmigen Behandlungsmediums in einen mit flüssigem Metall gefüllten Behälter zu schaffen, bei der die Kerbwirkung erheblich reduziert und damit die Standzeit erhöht wird, wobei ferner die Verbindung zwischen der Armierung und der feuerfesten Ummantelung verbessert werden soll, so dass ein größerer Wärmeübergang von der Armierung an die feuerfeste Ummantelung erreicht wird.The invention has for its object to provide a device for introducing a particular gaseous treatment medium in a container filled with liquid metal container in which the notch effect is significantly reduced and thus the service life is increased, further improving the connection between the reinforcement and the refractory sheath should be, so that one greater heat transfer from the armor to the refractory sheath is achieved.

Zur Lösung dieser Aufgabe wird gemäß der Erfindung bei einer Vorrichtung der eingangs beschriebenen Gattung vorgeschlagen, dass die Armierung aus mindestens zwei gewellten und außen gegeneinander versetzt auf dem Innenrohr befestigten Stäben gebildet ist, die zumindest einen abgerundeten Außenquerschnitt aufweisen, wobei die Stäbe nur an einzelnen Stellen fest mit dem Innenrohr verbunden sind, so dass die Ummantelung die Stäbe teilweise voll umschließt.To achieve this object, it is proposed according to the invention in a device of the type described above, that the reinforcement of at least two corrugated and externally offset from each other on the inner tube fixed rods is formed, which have at least a rounded outer cross section, wherein the rods only at individual points are firmly connected to the inner tube, so that the sheath partially completely encloses the rods.

Durch eine derartig ausgebildete Armierung wird die Kerbwirkung, die die Armierung auf die feuerfeste Ummantelung aus-üben kann, erheblich reduziert, was zu einer Erhöhung der Stand-zeit der Vorrichtung beiträgt, und es wird weiterhin eine gute Verbindung der Ummantelung mit der Armierung und damit mit dem Innenrohr bewirkt. Durch den zwangsläufig größeren Querschnitt der Armierung wird der Wärmeübergang von der Armierung auf die feuerfeste Ummantelung verbessert. Dies trägt aber auch zu einer Erhöhung der Biegesteifigkeit und einer Reduzierung der Torsionsgefahr der Vorrichtung bei.By such a trained reinforcement, the notch effect that can exert the armor on the refractory sheath, significantly reduced, which contributes to an increase in the life of the device, and it is still a good connection of the sheath with the reinforcement and thus effected with the inner tube. The inevitably larger cross-section of the reinforcement improves the heat transfer from the reinforcement to the refractory jacket. However, this also contributes to an increase in the flexural rigidity and a reduction in the risk of torsion of the device.

Weitere Merkmale einer Vorrichtung gemäß der Erfindung sind in der Ansprüchen 2 bis 5 offenbart.Further features of a device according to the invention are disclosed in claims 2 to 5.

Die Erfindung wird nachfolgend anhand in einer Zeichnung dargestellter Ausführungsbeispiele näher erläutert. Dabei zeigen

Fig. 1
einen Längsschnitt durch eine Vorrichtung gemäß der Erfindung und
Fig. 2
eine Aufrißdarstellung eines Innenrohres mit einer anders ausgestalteten Armierung.
The invention will be explained in more detail with reference to embodiments shown in a drawing. Show
Fig. 1
a longitudinal section through a device according to the invention and
Fig. 2
an elevational view of an inner tube with a differently designed reinforcement.

In der Figur 1 der Zeichnung ist der untere Bereich einer Vorrichtung, die auch als Tauchlanze bezeichnet wird, gezeigt, die zum Einleiten eines insbesondere gasförmigen Behandlungsmediums in einen mit flüssigem Metall gefüllten Behälter dient. Diese Vorrichtung besteht zunächst aus einem metallischen Rohr, nachfolgend als Innenrohr 1 bezeichnet, mit verhältnismäßig großem Querschnitt, welches in seinem unteren bzw. Eintauchbereich durch eine Platte 2 verschlossen ist. In diese Platte 2 ist ein Austrittsrohr 3 eingesetzt. Der untere Bereich des Innenrohres 1 ist von einer feuerfesten Ummantelung 4 aus keramischem Werkstoff umschlossen, in der sich ein Austrittskanal 3a befindet. Um diese Ummantelung 4 auf dem Innenrohr 1 zu sichern, ist dasselbe mit einer metallischen Armierung 5 versehen.In the figure 1 of the drawing, the lower portion of a device, which is also referred to as immersion lance, shown, which serves for introducing a particular gaseous treatment medium in a container filled with liquid metal container. This device consists first of a metallic tube, hereinafter referred to as the inner tube 1, with a relatively large cross-section, which is closed in its lower or immersion area by a plate 2. In this plate 2, an outlet pipe 3 is inserted. The lower region of the inner tube 1 is enclosed by a refractory sheath 4 of ceramic material, in which an outlet channel 3a is located. In order to secure this casing 4 on the inner tube 1, the same is provided with a metallic reinforcement 5.

Die Armierung 5 besteht im dargestellten Ausführungsbeispiel aus zwei Stäben 6 mit kreisförmigem Querschnitt, die als Wendel geformt und auf dem Innenrohr 1 befestigt sind. In der Zeichnung ist jedoch nur ein Stab 6 dargestellt. In vorteilhafter Weise sind die Stäbe 6 gleichmäßig über den Umfang des Innenrohres 1 verteilt angeordnet. Durch die wendelartige Ausgestaltung der Stäbe 6 sind dieselben nur an einzelnen Stellen fest mit dem Innenrohr 1 verbunden. Dies bedeutet, dass die feuerfeste Ummantelung 4 aus keramischem Werkstoff die Stäbe 6 teilweise voll umschließt, was eine gute Verbindung der Ummantelung 4 mit der Armierung 5 und damit mit dem Innenrohr 1 mit sich bringt. Durch den kreisförmigen Querschnitt der Stäbe 6 der Armierung 5 wird von denselben keinerlei Kerbwirkung auf die Ummantelung 4 ausgeübt, wodurch sich die Standzeit der Vorrichtung bzw. Tauchlanze erhöht. Durch den Querschnitt der Stäbe 6 und durch die wendelartige Form wird eine großflächige Berührung der Ummantelung 4 mit den Stäben 6 bzw. der Armierung 5 erreicht. Dies trägt dazu bei, dass die Ummantelung 4 von einem durch das Innenrohr 1 strömenden Gas mit einer niedrigen Temperatur über die Armierung 5 gekühlt werden kann. Durch den Querschnitt und die Form der Armierung 5 wird die Biegesteifigkeit der Vorrichtung erhöht, während sich gleichzeitig die Torsion verringert. Wird zumindest ein Stab 6 der Armierung 5 hohl ausgebildet, kann durch denselben zusätzlich ein Medium zur Kühlung der Ummantelung 4 geleitet werden. Ferner besteht die Möglichkeit, über eine hohle Armierung 5 zusätzlich ein weiteres, insbesondere gasförmiges Medium in das flüssige Metall einzuleiten. Dazu muß die hohle Armierung 2 einen entsprechenden, äußeren Anschluß und im Bereich der Ummantelung 3 einen Auslaßkanal besitzen.The reinforcement 5 consists in the illustrated embodiment of two rods 6 with a circular cross-section, which are formed as a helix and mounted on the inner tube 1. In the drawing, however, only one rod 6 is shown. Advantageously, the rods 6 are distributed uniformly over the circumference of the inner tube 1. Due to the helical configuration of the rods 6, the same are only in individual places firmly connected to the inner tube 1. This means that the refractory sheath 4 made of ceramic material, the bars 6 partially fully encloses, which brings a good connection of the sheath 4 with the reinforcement 5 and thus with the inner tube 1 with it. Due to the circular cross-section of the rods 6 of the reinforcement 5, no notch effect is exerted on the casing 4 by the latter, which increases the service life of the device or immersion lance. Due to the cross section of the rods 6 and the helical shape, a large-area contact of the sheath 4 with the rods 6 and the reinforcement 5 is achieved. This contributes to allowing the jacket 4 to be cooled by the gas 5 flowing through the inner tube 1 at a low temperature. By the cross-section and the shape of the reinforcement 5, the bending stiffness of the device is increased, while at the same time reduces the torsion. If at least one rod 6 of the reinforcement 5 is hollow, a medium for cooling the jacket 4 can additionally be conducted through it. It is also possible to additionally introduce a further, in particular gaseous, medium into the liquid metal via a hollow reinforcement 5. For this purpose, the hollow reinforcement 2 must have a corresponding outer terminal and in the region of the casing 3 an outlet channel.

Der Abstand zwischen den einzelnen Wendeln bzw. Windungen der Stäbe 6 der Armierung 5 beträgt in Abhängigkeit vom Durchmesser des Innenrohres 1 etwa 50 bis 200 mm. Der Durchmesser der Stäbe 6 der Armierung 5 kann zwischen 3 und 20 mm betragen, wobei der Außendurchmesser der Wendeln etwa 15 bis 40 mm ist. Bei einer hohlen Ausgestaltung eines Stabes 6 der Armierung 5 beträgt dessen Wandstärke mindestens 0,5 mm.The distance between the individual coils or turns of the rods 6 of the reinforcement 5 is about 50 to 200 mm depending on the diameter of the inner tube 1. The diameter of the rods 6 of the reinforcement 5 may be between 3 and 20 mm, wherein the outer diameter of the coils is about 15 to 40 mm. In a hollow configuration of a rod 6 of the reinforcement 5 whose wall thickness is at least 0.5 mm.

Aus der Figur 1 der Zeichnung ist ersichtlich, dass die aus mindestens zwei gewellten Stäben 6 gebildete Armierung 5 verschränkt auf dem Innenrohr 1 angeordnet ist. Die Verschränkung erstreckt sich in der Zeichnung um einen Winkel von etwa 45°; diese Verschränkung kann jedoch auch größer, beispielsweise 360° und mehr sein.From the figure 1 of the drawing it can be seen that the reinforcement formed from at least two corrugated rods 6 5th entangled on the inner tube 1 is arranged. The entanglement extends in the drawing by an angle of about 45 °; However, this entanglement can also be larger, for example 360 ° and more.

Bei dem Ausführungsbeispiel der Figur 2 sind die Stäbe 6 der Armierung 5 nicht verschränkt, sondern verlaufen genau parallel zur Achse des Innenrohres 1.In the embodiment of Figure 2, the rods 6 of the reinforcement 5 are not entangled, but extend exactly parallel to the axis of the inner tube. 1

In Abänderung der erläuterten Ausführungsbeispiele ist es möglich, die Stäbe 6, die die Armierung 5 bilden, als in einer Ebene gewellt auszubilden. Diese gewellten Stäbe 6 können dann entweder entsprechend der Figur 1 verschränkt oder entsprechend der Figur 2 axial zur Achse des Innenrohres 1 verlaufend auf dem Innenrohr 1 befestigt sein. Die Wellen der Stäbe 6 nehmen dann eine radiale Lage zum Innenrohr 1 ein.In a modification of the illustrated embodiments, it is possible to form the rods 6, which form the reinforcement 5, as corrugated in a plane. These corrugated rods 6 can then be entangled either according to the figure 1 or according to the figure 2 axially fixed to the axis of the inner tube 1 extending on the inner tube 1. The waves of the rods 6 then take a radial position to the inner tube 1 a.

Claims (5)

  1. An appliance for introducing an in particular gaseous treatment medium into a container filled with fluid metal, consisting of a metal inner tube with a metal reinforcement for the protection of a refractory encasement penetrated by at least one outlet channel, characterised as a reinforcement member (5) consisting of at least two undulated rods (6) staggered against one another and fixed to the inner tube (1), showing at least one rounded cross-section, wherein the rods (6) are only fixed to the inner tube in some individual spots, so that the encasement (4) partially encloses the rods (6) completely.
  2. An appliance as in claim 1, wherein the undulated rods (6) are constructed as a helix.
  3. An appliance as in claim 1 or 2, characterised by rods (6) having circular or oval cross-sections.
  4. An appliance as described in at least one of claims 1 to 3, wherein the rods are constructed hollowly.
  5. An appliance as described in at least one of claims 1 to 4, wherein the rods (6) are arranged interlacingly on the inner tube (1).
EP01113868A 2000-06-17 2001-06-07 Device for introducing a treatment agent, particularly a gaseous treatment agent, in a vessel filled with molten metal Expired - Lifetime EP1163964B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10029995 2000-06-17
DE10029995A DE10029995A1 (en) 2000-06-17 2000-06-17 Device for introducing an especially gaseous treatment medium into a container filled with liquid metal

Publications (2)

Publication Number Publication Date
EP1163964A1 EP1163964A1 (en) 2001-12-19
EP1163964B1 true EP1163964B1 (en) 2006-10-04

Family

ID=7646163

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01113868A Expired - Lifetime EP1163964B1 (en) 2000-06-17 2001-06-07 Device for introducing a treatment agent, particularly a gaseous treatment agent, in a vessel filled with molten metal

Country Status (3)

Country Link
EP (1) EP1163964B1 (en)
AT (1) ATE341411T1 (en)
DE (2) DE10029995A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004054026B4 (en) * 2004-11-05 2008-12-04 Jankowski Gmbh & Co. Kg Lance for introducing a particular gaseous medium into a liquid metal and method for the production

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2082270A (en) * 1970-10-07 1972-04-13 Monzino Riotinto Of Australia Limited Cooling of lances
ZA822007B (en) * 1981-04-02 1983-02-23 Monoconstruction Ltd Metallurgical lance
DE3534975A1 (en) * 1985-10-01 1987-04-02 Plibrico Co Gmbh Lance for treating crude iron or steel
DE3628185A1 (en) * 1986-08-20 1988-02-25 Plibrico Co Gmbh Immersion lance
DE20010803U1 (en) * 2000-06-17 2000-10-26 Jankowski Gmbh & Co Kg Device for introducing an especially gaseous treatment medium into a container filled with liquid metal

Also Published As

Publication number Publication date
EP1163964A1 (en) 2001-12-19
DE50111126D1 (en) 2006-11-16
ATE341411T1 (en) 2006-10-15
DE10029995A1 (en) 2001-12-20

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