EP2531623A1 - Gas purging device - Google Patents

Gas purging device

Info

Publication number
EP2531623A1
EP2531623A1 EP10798729A EP10798729A EP2531623A1 EP 2531623 A1 EP2531623 A1 EP 2531623A1 EP 10798729 A EP10798729 A EP 10798729A EP 10798729 A EP10798729 A EP 10798729A EP 2531623 A1 EP2531623 A1 EP 2531623A1
Authority
EP
European Patent Office
Prior art keywords
gas
purging device
line
rinsing
gas line
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.)
Granted
Application number
EP10798729A
Other languages
German (de)
French (fr)
Other versions
EP2531623B1 (en
Inventor
Bernhard Handle
Bojan Zivanovic
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.)
Refractory Intellectual Property GmbH and Co KG
Original Assignee
Refractory Intellectual Property GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Refractory Intellectual Property GmbH and Co KG filed Critical Refractory Intellectual Property GmbH and Co KG
Priority to PL10798729T priority Critical patent/PL2531623T3/en
Publication of EP2531623A1 publication Critical patent/EP2531623A1/en
Application granted granted Critical
Publication of EP2531623B1 publication Critical patent/EP2531623B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • C21C5/48—Bottoms or tuyéres of converters
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/18—Charging particulate material using a fluid carrier

Definitions

  • the invention relates to a gas purging device, as used for example in metallurgical melting vessels (such as converter, pan, Tundish) to inject a gas, optionally in combination with finely divided solids in a metallurgical melt.
  • metallurgical melting vessels such as converter, pan, Tundish
  • Gas purging devices gas purging bricks
  • directed porosity typically consist of a refractory ceramic body in which multiple passages (of small flow area) extend in the axial direction of the gas purging device The gas is fed at one end, passed through the passages and at the other end
  • the path of the gas through a gas purging plug with directed porosity is largely linear and often in the axial direction of the gas purging device, albeit
  • Embodiments are known in which the channels extend obliquely and / or coiled in relation to the axial direction of the gas purging device.
  • the refractory ceramic body has a high open porosity which flows through this body not along defined channels, but flows from pore to pore from the gas inlet side end
  • axial direction of the gas purging device this refers to the main direction in which the gas flows through the purging device
  • the axial direction is identical to the central longitudinal axis of the gas purging device.
  • Breakthrough fuses with the help of penetrating melt targeted away and / or frozen.
  • Breakthrough protection represents an additional component to the gas purging plug.
  • the invention is based on the object to offer a gas purging device of the generic type, which provides a high safety standard and reliable breakthrough of molten metal
  • the basic idea of the invention is to design the gas purging device with at least two rinsing zones which, although they can run directly next to one another, are supplied with gas separately.
  • the further idea of the invention consists in using the purge gas supplied to a purge zone, at the same time cooling a gas conduit associated with a further purge zone. This cooling is not necessary in the regular operation of the gas purging device; but she creates the
  • the invention relates to a gas purging device having a first rinsing zone, which is supplied with gas from a first gas line, and a second rinsing zone, which is supplied with gas by a second gas line, wherein the first and second rinsing zones extend in the axial direction of the gas rinsing device and the first gas conduit has a subsection which extends below a
  • Angle of 90 ° + 45 ° to the axial direction of the gas purging device and is arranged so that this portion is lapped by the gas supplied via the second gas line.
  • the flow direction of the molten metal will basically correspond to the axial direction of the gas purging device.
  • a diversion and thus a slowing down of the flow velocity take place.
  • the reduction of the flow velocity and the increase in the contact surface between said portion and said cooling gas can be optimized if the corresponding portion more or less perpendicular (perpendicular) to
  • the portion of the first gas line may have a ring shape or the shape of a part s of a ring.
  • An alternative embodiment provides to make the section of the first gas line meandering.
  • the affected section of the first gas line to be cooled can be guided through a second gas distribution chamber, into which the second gas line opens and from which the second rinsing zone extends.
  • the second gas distribution chamber fulfills a plurality of functions. Firstly, it serves to distribute the gas supplied via the second gas line and thus equalize the pressure conditions before the gas is introduced into the second rinse zone.
  • the volume of the gas distribution chamber can be used to receive the partial section of the first gas line to be cooled, so that this partial section can be surrounded on all sides with cooling gas.
  • fluidic connection to the first rinse zone has. This can for example be achieved by the first gas line with the exception of the part to be cooled with respect to the second
  • Gas distribution chamber is sealed. This can be achieved, for example, by providing one or more valves between the affected gas line and adjacent components.
  • the partial section of the first gas line to be cooled can run between sections of the gas line which are aligned with one another.
  • the said section connects, for example, in a design that a
  • Ring section is similar or meandering and opens into another, gas outlet side portion of the gas line, which is aligned with the gas inlet end of the gas line.
  • the gas supplied via the first gas line may be in a first
  • Gas distribution chamber open, from which extends the first rinse zone.
  • the first rinse zone may be made of a refractory ceramic material and may have directional or non-directional porosity. It is also possible to form a first purge zone of directional porosity and a second purge zone of undirected porosity. Likewise, both rinsing zones can each have directional or uneven porosity.
  • Gas flushing device can be installed with more than two rinsing zones, with further rinsing zones either via the gas lines for the first and second rinsing zones are supplied. Or it is possible to provide additional rinse zones via separate gas lines with gas and / or gas / solid mixtures.
  • the arrangement of the individual rinsing zones is basically not
  • Both rinsing zones can be supplied with gas at the gas inlet end via a respectively assigned gas distribution chamber, wherein according to the invention a gas line runs through a gas distribution chamber and is cooled by the gas, which is flushed in via a further gas line there.
  • Figure 1 A first embodiment of an inventive
  • Gas flushing device in longitudinal section and in a view along the line X-X.
  • FIG. 2 shows a second embodiment of the gas purging device in FIG.
  • the gas purging device according to FIG. 1 has a cylindrical shape; si e could be designed analogous frusto-conical. Concentric with the center longitudinal axis M-M is a first cylindrical rinsing zone 10
  • a first rinse zone 10 Below the first rinse zone 10 is a first
  • Gas distribution chamber 14 is arranged.
  • a second rinse zone 20 Concentric with the first rinse zone 10, a second rinse zone 20 with so-called undirected porosity runs around it, the refractory material of this second rinse zone 20 again extending from a gas supply-side end 20u to a gas outlet-side end 20o. Below the annular cylindrical second rinsing zone 20, a second gas distribution chamber 24 runs.
  • the gas purging device is surrounded by a metal jacket 30, which merges into a bottom 32, which simultaneously forms lower boundary walls for the gas distribution chambers 1 4, 24, which are separated by a metal cylinder 34.
  • a second gas line 26 which passes (gas-tight) through the bottom 32 and with
  • the gas in the second gas distribution chamber 24 distributed and from there into the open porosity of the second rinse zone 20 can be introduced.
  • the gas then flows through the second rinse zone 20 (in the figure: from bottom to top, ie in the axial direction of the gas purging device) until it leaves the gas purging device at 20 o.
  • a first gas line 16 also opens into the second
  • said portion carries the reference numeral 16t, and then with another portion 1 6z toward the partition wall 34, passes through this (gas-tight) and then opens in the first gas distribution chamber 14 a.
  • the gas supplied via line 1 6 initially flows in the axial direction of the gas purging device, is then deflected at 16 u and subsequently flows substantially perpendicularly to the previous one
  • the sections 1 6t, 16z have the function of an integrated breakdown protection.
  • the second gas line 1 6 here is not in the manner of a ring section through the second
  • the section to be cooled 1 6t extends at an angle of 90 ° + 45 ° to the axial direction of the gas purging device, wherein the axial direction as the
  • Direction corresponds to the main flow direction of the gas, that is substantially parallel to the central longitudinal axis M-M of the gas purging device, or in other words: the direction between gas inlet side sections l Ou, 20u and gasauslass discourseen
  • Sections 1 0o, 20o of the rinse zones 1 0, 20 are Sections 1 0o, 20o of the rinse zones 1 0, 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Furnace Details (AREA)
  • Furnace Charging Or Discharging (AREA)

Abstract

The invention relates to a gas purging device, as is used, for example, in metallurgical melting vessels (such as converters, ladles, and tundishes) to blow a gas, optionally in combination with finely distributed solids, into a metallurgical melt.

Description

Gasspüleinrichtung  gas purging
B e s c h r e i b u n g Description
Die Erfindung betrifft eine Gasspüleinrichtung, wie sie beispielsweise in metallurgischen Schmelzgefäßen (wie Konverter, Pfanne, Tundish) verwendet wird, um ein Gas, gegebenenfalls in Kombination mit fein verteilten Feststoffen, in eine metallurgische Schmelze einzublasen. The invention relates to a gas purging device, as used for example in metallurgical melting vessels (such as converter, pan, Tundish) to inject a gas, optionally in combination with finely divided solids in a metallurgical melt.
Eine Übersicht über verschiedene Bauformen solcher An overview of different types of such
Gasspüleinrichtungen gibt die Radex-Rundschau 1987, Seiten 288 bis 302. Danach unterscheidet man beispielsweise sogenannte Fugenspüler, Spül steine mit„ungerichteter Porosität" und Spülsteine mit„gerichteter Porosität". Gasspüleinrichtungen gives the Radex Rundschau 1987, pages 288 to 302. Thereafter, for example, so-called joint rinse, stones with "undirected porosity" and purging stones with "directed porosity".
Beim Fugenspüler erfolgt die Gaszufuhr beispielsweise über einen Ringspalt zwi schen einem dichten keramischen Körper und einem umfangsseitigen Blechmantel . Gasspüleinrichtungen (Gasspülsteine) mit so genannter„gerichteter Porosität" bestehen üblicherweise aus einem feuerfesten keramischen Körper, in dem mehrere Kanäle (mit geringem Strömungsquerschnitt) in Axialrichtung der Gasspüleinrichtung verlaufen. Das Gas wird an einem Ende zugeführt, durch die Kanäle geleitet und am anderen Ende aus den Kanälen in die Metallschmelze abgegeben. Der Weg des Gases durch einen Gasspülstein mit gerichteter Porosität ist weitestgehend linear und häufig in Axialrichtung der Gasspüleinrichtung, wenngleich When Fugenspüler the gas supply takes place, for example, via an annular gap between a dense ceramic body and a circumferential metal jacket. Gas purging devices (gas purging bricks) of so-called "directed porosity" typically consist of a refractory ceramic body in which multiple passages (of small flow area) extend in the axial direction of the gas purging device The gas is fed at one end, passed through the passages and at the other end The path of the gas through a gas purging plug with directed porosity is largely linear and often in the axial direction of the gas purging device, albeit
Ausführungsformen bekannt sind, bei denen die Kanäle im Verhältnis zur Axialrichtung der Gasspüleinrichtung schräg und/oder gewendelt verlaufen. Embodiments are known in which the channels extend obliquely and / or coiled in relation to the axial direction of the gas purging device.
Bei Gasspülsteinen mit so genannter„ungerichteter Porosität" weist der feuerfeste keramische Körper eine hohe offene Porosität auf. Das Gas durchströmt diesen Körper al so nicht entlang definierter Kanäle, sondern strömt von Pore zu Pore vom gaseinlassseitigen Ende zum In the case of gas purging pits with so-called "undirected porosity", the refractory ceramic body has a high open porosity which flows through this body not along defined channels, but flows from pore to pore from the gas inlet side end
gasauslassseitigen Ende, wobei aber auch dieser Strömungsweg im Gas outlet end, but also this flow path in
Wesentlichen in Axialrichtung der Gasspüleinrichtung erfolgt. Substantially takes place in the axial direction of the gas purging device.
Sofern nachstehend von„Axialrichtung der Gasspüleinrichtung" gesprochen wird, so ist damit die Hauptrichtung gemeint, in der das Gas die Spüleinrichtung durchströmt. Bei einem zylinderförmigen If the term "axial direction of the gas purging device" is used, this refers to the main direction in which the gas flows through the purging device
beziehungsweise kegelstumpfförmigen Gasspülstein ist die Axialrichtung identisch mit der Mittenlängsachse der Gasspüleinrichtung. or truncated conical gas purging plug, the axial direction is identical to the central longitudinal axis of the gas purging device.
Kombinationen der genannten Ausführungsformen von Combinations of said embodiments of
Gasspüleinrichtungen gehören ebenfalls zum Stand der Technik Gas purgers are also state of the art
(DE 37 16 388 C l ) . Insbesondere bei Gasspülsteinen mit gerichteter Porosität besteht die Gefahr einer Infiltration von Metal lschmelze in den Gasspülstein entlang der Kanäle. Analog gilt dies für Fugenspüler. Es sind verschiedene Maßnahmen vorgeschlagen worden, eindringende Metal l schmelze zu stoppen. Dazu gehören so genannte (DE 37 16 388 C l). Especially with gas purging bricks with directed Porosity there is a risk of infiltration of metal melt in the gas purging plug along the channels. Similarly, this applies to joint washer. Various measures have been proposed to stop penetrating metal melt. These include so-called
Durchbruchsicherungen, mit deren Hilfe eindringende Schmelze gezielt weggeführt und/oder eingefroren wird. Breakthrough fuses, with the help of penetrating melt targeted away and / or frozen.
Eine seit Langem bewährte Ausführungsform ergibt sich aus der EP 01 05868 B l . Ein gewi sser Nachteil besteht darin, dass die A long-proven embodiment results from EP 01 05868 B l. A certain disadvantage is that the
Durchbruchsicherung ein zusätzliches Bauteil zum Gasspülstein darstellt. Breakthrough protection represents an additional component to the gas purging plug.
Die Erfindung liegt die Aufgabe zu Grunde, eine Gasspüleinrichtung der gattungsgemäßen Art anzubieten, die einen hohen Sicherheitsstandard schafft und einen Durchbruch von Metallschmelze zuverlässig The invention is based on the object to offer a gas purging device of the generic type, which provides a high safety standard and reliable breakthrough of molten metal
verhindert. prevented.
Der Grundgedanke der Erfindung besteht darin, die Gasspüleinrichtung mit mindestens zwei Spülzonen auszubilden, die zwar unmittelbar nebeneinander verlaufen können, aber getrennt mit Gas versorgt werden. Der weitere Erfindungsgedanke besteht darin, das einer Spülzone zugeführte Spülgas zu nutzen, gleichzeitig eine einer weiteren Spülzone zugeordnete Gasleitung zu kühlen. Diese Kühlung ist im Regelbetrieb der Gasspüleinrichtung nicht notwendig; sie schafft aber die The basic idea of the invention is to design the gas purging device with at least two rinsing zones which, although they can run directly next to one another, are supplied with gas separately. The further idea of the invention consists in using the purge gas supplied to a purge zone, at the same time cooling a gas conduit associated with a further purge zone. This cooling is not necessary in the regular operation of the gas purging device; but she creates the
Möglichkeit, im Fall einer Infiltration von Metallschmelze in diese Gasleitung die Metallschmelze einzufrieren und damit ein weiteres Eindringen der Metallschmelze und eine Zerstörung der Gasspüleinrichtung zu verhindern. Die Erfindung hat weiters erkannt, dass dieses Sicherheitsmerkmal nur dann zuverlässig erreicht wird, wenn der gekühlte Teilabschnitt der betroffenen Gasleitung eine Orientierung hat, die von der Axialrichtung der Gasspüleinrichtung abweicht, wobei die Orientierung dieses Teilabschnittes im Wesentlichen senkrecht zur Hauptrichtung der Gasleitung (= Axialrichtung der Gasspüleinrichtung) sein sol lte . Possibility to freeze the molten metal in case of infiltration of molten metal in this gas line and thus further penetration of the molten metal and destruction of the Gas purifier to prevent. The invention has further recognized that this safety feature is only reliably achieved when the cooled section of the gas line concerned has an orientation which deviates from the axial direction of the gas purging device, wherein the orientation of this section substantially perpendicular to the main direction of the gas line (= axial direction of Gas flushing device should be sol lte.
In ihrer allgemeinsten Ausführungsform betrifft die Erfindung eine Gasspüleinrichtung mit einer ersten Spülzone, die von einer ersten Gasleitung mit Gas versorgt wird, und eine zweite Spülzone, die von einer zweiten Gasleitung mit Gas versorgt wird, wobei sich erste und zweite Spülzone in Axialrichtung der Gasspüleinrichtung erstrecken und die erste Gasleitung einen Teilabschnitt aufweist, der unter einem In its most general embodiment, the invention relates to a gas purging device having a first rinsing zone, which is supplied with gas from a first gas line, and a second rinsing zone, which is supplied with gas by a second gas line, wherein the first and second rinsing zones extend in the axial direction of the gas rinsing device and the first gas conduit has a subsection which extends below a
Winkel von 90° + 45 ° zur Axialrichtung der Gasspüleinrichtung verläuft und so angeordnet ist, dass dieser Teilabschnitt von dem über die zweite Gasleitung zugeführten Gas umspült wird. Angle of 90 ° + 45 ° to the axial direction of the gas purging device and is arranged so that this portion is lapped by the gas supplied via the second gas line.
Sofern eine Metallschmelze in die Gasspüleinrichtung eindringt wird die Strömungsrichtung der Metallschmelze grundsätzlich der Axialrichtung der Gasspüleinrichtung entsprechen. Spätestens im Bereich des gekühlten Teilabschnitts der ersten Gasleitung erfolgt dann eine Umlenkung und damit eine Verlangsamung der Strömungsgeschwindigkeit. Durch die Kühlung dieses Teilabschnitts mit Hilfe des Spülgases lässt sich die Viskosität der eingedrungenen Schmelze rasch erhöhen und der weitere Schmelze-Fluss zum Still stand bringen. Die Reduzierung der Strömungsgeschwindigkeit und die Erhöhung der Kontakt-Oberfläche zwischen dem genannten Teilabschnitt und dem genannten Kühlgas kann optimiert werden, wenn der entsprechende Teilabschnitt mehr oder weniger rechtwinklig (senkrecht) zur If a molten metal penetrates into the gas purging device, the flow direction of the molten metal will basically correspond to the axial direction of the gas purging device. At the latest in the area of the cooled subsection of the first gas line, a diversion and thus a slowing down of the flow velocity take place. By cooling this section using the purge gas, the viscosity of the melt penetrated quickly increase and bring the other melt flow to a standstill. The reduction of the flow velocity and the increase in the contact surface between said portion and said cooling gas can be optimized if the corresponding portion more or less perpendicular (perpendicular) to
Axialrichtung der Gasspüleinrichtung verläuft und möglichst lang ist. Axialrichtung the gas purging device runs and is as long as possible.
Zu diesem Zweck kann der Teilabschnitt der ersten Gasleitung eine Ringform oder die Form eines Teil s eines Rings aufweisen. Eine alternative Ausführungsform sieht vor, den Teilabschnitt der ersten Gasleitung mäanderförmig zu gestalten. For this purpose, the portion of the first gas line may have a ring shape or the shape of a part s of a ring. An alternative embodiment provides to make the section of the first gas line meandering.
Der betroffene, zu kühlende Teilabschnitt der ersten Gasleitung kann durch eine zweite Gasverteilkammer geführt sein, in die die zweite Gasleitung einmündet und von der sich die zweite Spülzone erstreckt. Bei dieser Ausführungsform erfüllt die zweite Gasverteilkammer mehrere Funktionen : Zum einen dient sie der Verteilung des über die zweite Gasleitung zugeführten Gases und damit einer Vergleichmäßigung der Druckverhältnisse bevor das Gas in die zweite Spülzone eingeführt wird. Zum anderen kann das Volumen der Gasverteilkammer genutzt werden, den zu kühlenden Teilabschnitt der ersten Gasleitung aufzunehmen, so dass dieser Teilabschnitt allseitig mit Kühlgas umspült werden kann. The affected section of the first gas line to be cooled can be guided through a second gas distribution chamber, into which the second gas line opens and from which the second rinsing zone extends. In this embodiment, the second gas distribution chamber fulfills a plurality of functions. Firstly, it serves to distribute the gas supplied via the second gas line and thus equalize the pressure conditions before the gas is introduced into the second rinse zone. On the other hand, the volume of the gas distribution chamber can be used to receive the partial section of the first gas line to be cooled, so that this partial section can be surrounded on all sides with cooling gas.
Die Kühlwirkung und damit die Sicherheit der Gasspüleinrichtung wird erhöht, wenn die zweite Gasverteilkammer keine unmittelbare The cooling effect and thus the safety of the gas purging device is increased if the second gas distribution chamber no immediate
strömungstechnische Verbindung zur ersten Spülzone hat. Dies kann beispielsweise dadurch erreicht werden, indem die erste Gasleitung mit Ausnahme des zu kühlenden Teilabschnitts gegenüber der zweiten fluidic connection to the first rinse zone has. This can for example be achieved by the first gas line with the exception of the part to be cooled with respect to the second
Gasverteilkammer abgedichtet wird. Dies kann beispielswei se dadurch erreicht werden, indem zwischen der betroffenen Gasleitung und benachbarten Bauteilen eine oder mehrere Di chtungen vorgesehen werden . Gas distribution chamber is sealed. This can be achieved, for example, by providing one or more valves between the affected gas line and adjacent components.
Der zu kühlende Teilabschnitt der ersten Gasleitung kann zwischen Abschnitten der Gasleitung verlaufen, die miteinander fluchten. Mit anderen Worten : An ein erstes, mehr oder weniger geradliniges, gaszuführseitiges Ende der Gasleitung schließt sich der genannte Teilabschnitt beispielsweise in einer Bauform an, die einem The partial section of the first gas line to be cooled can run between sections of the gas line which are aligned with one another. In other words, to a first, more or less straight, gas supply side end of the gas line, the said section connects, for example, in a design that a
Ringabschnitt ähnelt oder mäanderförmig ist und in einen weiteren, gasauslassseitigen Abschnitt der Gasleitung einmündet, der fluchtend zum gaseinlassseitigen Ende der Gasleitung verläuft. Ring section is similar or meandering and opens into another, gas outlet side portion of the gas line, which is aligned with the gas inlet end of the gas line.
Das über die erste Gasleitung zugeführte Gas kann in eine erste The gas supplied via the first gas line may be in a first
Gasverteilkammer münden, von der sich die erste Spülzone erstreckt. Dies gilt selbstverständlich analog für andere Ausführungsformen der ersten Gasleitung. Gas distribution chamber open, from which extends the first rinse zone. Of course, this applies analogously to other embodiments of the first gas line.
Die erste Spülzone kann ebenso wie die zweite Spülzone aus einem feuerfesten keramischen Werkstoff bestehen und eine gerichtete oder ungerichtete Porosität aufweisen. Es ist auch möglich, eine erste Spülzone mit gerichteter Porosität und eine zweite Spülzone mit ungerichteter Porosität auszubilden. Ebenso können beiden Spülzonen jeweil s gerichtete oder ungeri chtete Porosität aufweisen. Die The first rinse zone, like the second rinse zone, may be made of a refractory ceramic material and may have directional or non-directional porosity. It is also possible to form a first purge zone of directional porosity and a second purge zone of undirected porosity. Likewise, both rinsing zones can each have directional or uneven porosity. The
Gasspüleinrichtung gemäß der Erfindung kann mit mehr als zwei Spül zonen ausgebil det werden, wobei weitere Spülzonen entweder über die Gasl eitungen für die erste und zweite Spülzone mit versorgt werden. Oder ist es möglich, weitere Spülzonen über getrennte Gasleitungen mit Gas und/oder Gas-/Feststoffgemischen zu versorgen. Gas flushing device according to the invention can be ausgebil det with more than two rinsing zones, with further rinsing zones either via the gas lines for the first and second rinsing zones are supplied. Or it is possible to provide additional rinse zones via separate gas lines with gas and / or gas / solid mixtures.
Die Anordnung der einzelnen Spülzonen ist grundsätzlich nicht The arrangement of the individual rinsing zones is basically not
entscheidend. Eine kompakte Ausführungsform ergibt sich j edoch, wenn die zweite Spülzone die erste Spülzone konzentrisch umgibt. Dabei kann beispielsweise die mittig, axial verlaufende erste Spülzone mit crucial. However, a compact embodiment results when the second rinsing zone concentrically surrounds the first rinsing zone. In this case, for example, the center, axially extending first rinse zone with
gerichteter Porosität ausgebildet sein und von einer mehr oder weniger zylinderförmigen zweiten Spülzone mit ungerichteter Porosität umgeben sein. Beide Spülzonen können am gaseinlassseitigen Ende über eine jeweils zugeordnete Gasverteilkammer mit Gas versorgt werden, wobei erfindungsgemäß eine Gasleitung durch eine Gasverteilkammer läuft und von dem Gas, welches über eine weitere Gasleitung dort eingespült wird, gekühlt wird. directed porosity and be surrounded by a more or less cylindrical second rinsing zone with undirected porosity. Both rinsing zones can be supplied with gas at the gas inlet end via a respectively assigned gas distribution chamber, wherein according to the invention a gas line runs through a gas distribution chamber and is cooled by the gas, which is flushed in via a further gas line there.
Weitere Merkmale der Erfindung ergeben sich aus den Merkmalen der Unteransprüche sowie den sonstigen Anmeldungsunterlagen. Other features of the invention will become apparent from the features of the claims and the other application documents.
Die Erfindung wird nachstehend anhand verschiedener The invention will be described below with reference to various
Ausführungsbeispiele näher erläutert. Dabei zeigen, jeweils in Embodiments explained in more detail. Show, each in
schematisierter Darstellung: schematic representation:
Figur 1 : Eine erste Ausführungsform einer erfindungsgemäßen Figure 1: A first embodiment of an inventive
Gasspüleinrichtung im Längsschnitt und in einer Ansicht entlang der Linie X-X.  Gas flushing device in longitudinal section and in a view along the line X-X.
Figur 2 : Eine zweite Ausführungsform der Gasspüleinrichtung im FIG. 2 shows a second embodiment of the gas purging device in FIG
Längsschnitt. In den Figuren sind gleiche oder gleichwirkende Bauteile mit gleichen Bezugsziffern dargestellt. Longitudinal section. In the figures, the same or equivalent components are shown with the same reference numerals.
Die Gasspüleinrichtung gemäß Figur 1 weist eine Zylinderform auf; si e könnte analog auch kegelstumpfförmig gestaltet sein. Konzentrisch zur Mittenlängsachse M-M ist eine erste zylindrische Spülzone 1 0 The gas purging device according to FIG. 1 has a cylindrical shape; si e could be designed analogous frusto-conical. Concentric with the center longitudinal axis M-M is a first cylindrical rinsing zone 10
vorgesehen, entlang der eine Vielzahl von schlitzartigen Kanälen 12 von einem gaszuführseitigen Ende l Ou zu einem gasauslassseitigen Ende 1 0ο verlaufen. Unterhalb der ersten Spülzone 10 ist eine erste provided along which a plurality of slit-like channels 12 extend from a gaszuführseitigen end l Ou to a gas outlet end 1 to. Below the first rinse zone 10 is a first
Gasverteilkammer 14 angeordnet. Gas distribution chamber 14 is arranged.
Konzentrisch zur ersten Spülzone 1 0 verläuft um diese herum eine zweite Spülzone 20 mit so genannter ungerichteter Porosität, wobei sich das Feuerfestmaterial dieser zweiten Spülzone 20 wiederum von einem gaszuführseitigen Ende 20u bis zu einem gasauslassseitigen Ende 20o erstreckt. Unterhalb der ringartigen zylindrischen zweiten Spülzone 20 verläuft eine zweite Gasverteilkammer 24. Concentric with the first rinse zone 10, a second rinse zone 20 with so-called undirected porosity runs around it, the refractory material of this second rinse zone 20 again extending from a gas supply-side end 20u to a gas outlet-side end 20o. Below the annular cylindrical second rinsing zone 20, a second gas distribution chamber 24 runs.
Umfangsseitig wird die Gasspüleinrichtung von einem Blechmantel 30 eingefasst, der in einen Boden 32 übergeht, der gleichzeitig untere Begrenzungswände für die Gasverteilkammern 1 4, 24 bildet, die über einen Blechzylinder 34 voneinander getrennt sind. On the periphery, the gas purging device is surrounded by a metal jacket 30, which merges into a bottom 32, which simultaneously forms lower boundary walls for the gas distribution chambers 1 4, 24, which are separated by a metal cylinder 34.
In die zweite Gasverteilkammer 24 mündet eine zweite Gasleitung 26, die entsprechend (gasdicht) durch den Boden 32 verläuft und mit In the second gas distribution chamber 24 opens a second gas line 26, which passes (gas-tight) through the bottom 32 and with
Abstand zum unteren Ende 20u der zweiten Spülzone 20 endet, so dass das Gas in der zweiten Gasverteilkammer 24 verteilt und von dort in die offene Porosität der zweiten Spülzone 20 eingeführt werden kann. Das Gas durchströmt dann die zweite Spülzone 20 (in der Figur: von unten nach oben, also in Axialrichtung der Gasspüleinrichtung), bis es die Gasspüleinrichtung bei 20o verlässt. Distance to the lower end 20u of the second rinse zone 20 ends, so that the gas in the second gas distribution chamber 24 distributed and from there into the open porosity of the second rinse zone 20 can be introduced. The gas then flows through the second rinse zone 20 (in the figure: from bottom to top, ie in the axial direction of the gas purging device) until it leaves the gas purging device at 20 o.
Eine erste Gasleitung 16 mündet ebenfalls in die zweite A first gas line 16 also opens into the second
Gasverteilkammer 24, wobei auch sie (gasdicht) den Boden 32 Gas distribution chamber 24, whereby they (gas-tight) the bottom 32nd
durchgreift, verläuft dann aber kontinuierlich weiter und zwar goes through, but then continues to run and that
halbkreisförmig in der zweiten Gasverteilkammer 24, wobei dieser Teilabschnitt das Bezugszeichen 16t trägt, und anschließend mit einem weiteren Abschnitt 1 6z in Richtung auf die Trennwand 34, durchgreift diese (gasdicht) und mündet dann in der ersten Gasverteilkammer 14 ein. semicircular in the second gas distribution chamber 24, said portion carries the reference numeral 16t, and then with another portion 1 6z toward the partition wall 34, passes through this (gas-tight) and then opens in the first gas distribution chamber 14 a.
Das über die Leitung 1 6 zugeführte Gas strömt demnach zunächst in Axialrichtung der Gasspüleinrichtung, wird dann, bei 16u umgelenkt, strömt im Weiteren im Wesentlichen senkrecht zur bisherigen Accordingly, the gas supplied via line 1 6 initially flows in the axial direction of the gas purging device, is then deflected at 16 u and subsequently flows substantially perpendicularly to the previous one
Strömungsrichtung durch die zweite Gasverteilkammer 24 bevor das Gas in der ersten Gasverteilkammer 1 4 austritt, sich dort verteilt und durch die Kanäle 1 2 der ersten Spülzone 1 0 vom gaseinlassseitigen Ende l Ou zum gasauslassseitigen Ende 1 0ο diese Spülzone 10 durchströmt und anschließend verlässt. Flow direction through the second gas distribution chamber 24 before the gas exits in the first gas distribution chamber 1 4, distributed there and flows through the channels 1 2 of the first rinsing zone 1 0 gaseinlassseitigen end of the gas inlet end 10 oo this rinsing zone 10 and then leaves.
Aus der beschriebenen Anordnung ergibt sich, dass das über die zweite Gasleitung 26 zugeführte Gas die erste Gasleitung 16, speziell den Teilabschnitt 1 6t in der zweiten Gasverteilkammer 24 umströmt und damit kühlt. Dies schafft die Möglichkeit Metallschmelze, die über die Gaskanäle 1 2 eindringt, im Bereich 1 6t, 1 6z mit Hilfe des über di e Gasl eitung 26 zugeführten Gases zu kühlen und einzufrieren und damit die It results from the arrangement described that the gas supplied via the second gas line 26 flows around the first gas line 16, specifically the partial section 16t in the second gas distribution chamber 24, and thus cools it. This creates the possibility of molten metal, which penetrates via the gas channels 1 2, to cool and freeze in the region 1 6t, 1 6z by means of the gas supplied via the gas line 26 and thus to freeze
Metallschmelze-Infiltration zu stoppen. Die Abschnitte 1 6t, 16z haben die Funktion einer integrierten Durchbruchsicherung. Stop molten metal infiltration. The sections 1 6t, 16z have the function of an integrated breakdown protection.
Das gleiche Prinzip wird bei der in Figur 2 dargestellten The same principle is shown in the illustrated in Figure 2
Ausführungsform angewendet. Die zweite Gasleitung 1 6 ist hier allerdings nicht nach Art eines Ringabschnitts durch die zweite Embodiment applied. However, the second gas line 1 6 here is not in the manner of a ring section through the second
Gasverteilkammer 24 geführt. Der Teilabschnitt 1 6t verläuft vielmehr geradlinig durch die zweite Gasverteilkammer 24 und die Trennwand 34 in die erste Gasverteilkammer 14, an die sich nach oben die erste Gas distribution chamber 24 out. Rather, the section 1 6t runs in a straight line through the second gas distribution chamber 24 and the dividing wall 34 into the first gas distribution chamber 14, to which the first one upwards
Spülzone 1 0 mit gerichteter Porosität anschließt. Rinsing zone 1 0 followed by directed porosity.
Wesentlich bei beiden Ausführungsformen ist, dass der zu kühlende Teilabschnitt 1 6t unter einem Winkel von 90° + 45 ° zur Axialrichtung der Gasspüleinrichtung verläuft, wobei die Axialrichtung als die It is essential in both embodiments that the section to be cooled 1 6t extends at an angle of 90 ° + 45 ° to the axial direction of the gas purging device, wherein the axial direction as the
Richtung definiert ist, die der Hauptströmungsrichtung des Gases entspricht, also im Wesentlichen parallel zur Mittenl ängsachse M-M der Gasspüleinrichtung, oder anders ausgedrückt: Der Richtung zwischen gaseinlassseitigen Abschnitten l Ou, 20u und gasauslassseitigen Direction is defined, which corresponds to the main flow direction of the gas, that is substantially parallel to the central longitudinal axis M-M of the gas purging device, or in other words: the direction between gas inlet side sections l Ou, 20u and gasauslassseitigen
Abschnitten 1 0ο, 20o der Spülzonen 1 0, 20. Sections 1 0o, 20o of the rinse zones 1 0, 20.

Claims

Gasspüleinrichtung P at e n t an s p r ü c h e Gas flushing device P at ent sprich
1. Gasspüleinrichtung mit einer ersten Spülzone (10), die von einer 1. Gas flushing device with a first rinsing zone (10) of a
ersten Gasleitung (16) mit Gas versorgt wird, und einer zweiten Spülzone (20), der von einer zweiten Gasleitung (26) mit Gas versorgt wird, wobei sich erste und zweite Spülzone (10, 20) in Axialrichtung der Gasspüleinrichtung erstrecken und die erste Gasleitung (16) einen Teilabschnitt (16t) aufweist, der unter einem Winkel von 90 +/- 45 Grad zur Axialrichtung der Gasspüleinrichtung verläuft und so angeordnet ist, dass dieser Teilabschnitt (16t) von dem über die zweite Gasleitung (26) zugeführten Gas umspült wird.  first gas line (16) is supplied with gas, and a second rinsing zone (20) which is supplied with gas from a second gas line (26), wherein the first and second rinsing zones (10, 20) extend in the axial direction of the gas rinsing device and the first Gas line (16) has a portion (16t) which extends at an angle of 90 +/- 45 degrees to the axial direction of the gas purging device and is arranged so that this portion (16t) of the via the second gas line (26) supplied gas flows around becomes.
2. Gasspüleinrichtung nach Anspruch 1, bei der der Teilabschnitt (16t) der ersten Gasleitung (16) durch eine zweite Gasverteilkammer (24) geführt ist, in die die zweite Gasleitung (26) einmündet und von der sich die zweite Spülzone (20) erstreckt. 2. Gas purging device according to claim 1, wherein the portion (16t) of the first gas line (16) through a second gas distribution chamber (24) is guided, in which the second gas line (26) opens and from which extends the second rinsing zone (20) ,
3. Gasspüleinrichtung nach Anspruch 2, bei der die zweite Gasverteilkammer (24) keine unmittelbare strömungstechnische Verbindung zur ersten Spülzone (10) hat. 3. Gas purging device according to claim 2, wherein the second gas distribution chamber (24) has no direct fluidic connection to the first rinsing zone (10).
4. Gasspüleinrichtung nach Anspruch 1, bei der der Teilabschnitt (16t) der ersten Gasleitung (16) eine Ringform oder die Form eines Teils eines Rings aufweist. 4. A gas purging device according to claim 1, wherein the partial section (16t) of the first gas conduit (16) has an annular shape or the shape of a part of a ring.
5. Gasspüleinrichtung nach Anspruch 1, bei der der Teilabschnitt (16t) der ersten Gasleitung (16) einen mäanderförmigen Verlaufhat. 5. Gas purging device according to claim 1, wherein the portion (16t) of the first gas line (16) has a meandering course.
6. Gasspüleinrichtung nach Anspruch 1, bei der der Teilabschnitt (16) der ersten Gasleitung (16) zwischen Abschnitten der Gasleitung (16) verläuft, die miteinander fluchten. 6. Gas purging device according to claim 1, wherein the portion (16) of the first gas line (16) extends between sections of the gas line (16) which are aligned with each other.
7. Gasspüleinrichtung nach Anspruch 1, deren erste Gasleitung (16) in eine erste Gasverteilkammer (14) mündet, von der sich die erste Spülzone (10) erstreckt. 7. Gas purging device according to claim 1, whose first gas line (16) opens into a first gas distribution chamber (14) from which the first rinsing zone (10) extends.
8. Gasspüleinrichtung nach Anspruch 1, deren erste Spülzone (10) aus einem feuerfesten keramischen Werkstoff besteht und eine gerichtete und/oder ungerichtete Porosität aufweist. 8. Gas purging device according to claim 1, whose first rinsing zone (10) consists of a refractory ceramic material and has a directional and / or non-directional porosity.
9. Gasspüleinrichtung nach Anspruch 1, deren zweite Spülzone (20) aus einem feuerfesten keramischen Werkstoff besteht und eine gerichtete und/oder ungerichtete Porosität aufweist. 9. Gas purging device according to claim 1, whose second rinsing zone (20) consists of a refractory ceramic material and has a directional and / or non-directional porosity.
10. Gasspüleinrichtung nach Anspruch 1, deren zweite Spülzone (20) die erste Spülzone (10) konzentrisch umgibt. 10. Gas purging device according to claim 1, whose second rinsing zone (20) concentrically surrounds the first rinsing zone (10).
EP10798729.9A 2010-02-05 2010-12-11 Gas purging device Active EP2531623B1 (en)

Priority Applications (1)

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DE102010007126A DE102010007126B3 (en) 2010-02-05 2010-02-05 gas purging
PCT/EP2010/007568 WO2011095193A1 (en) 2010-02-05 2010-12-11 Gas purging device

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EP2531623B1 EP2531623B1 (en) 2014-10-08

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KR (1) KR20120116456A (en)
CN (1) CN102725427B (en)
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JP5711269B2 (en) 2015-04-30
EP2531623B1 (en) 2014-10-08
ES2522532T3 (en) 2014-11-14
PL2531623T3 (en) 2015-01-30
JP2013519061A (en) 2013-05-23
CN102725427A (en) 2012-10-10
CN102725427B (en) 2015-04-15

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