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EP1631404A2 - Gas rinser with suitable slot-shaped canals - Google Patents

Gas rinser with suitable slot-shaped canals

Info

Publication number
EP1631404A2
EP1631404A2 EP04739509A EP04739509A EP1631404A2 EP 1631404 A2 EP1631404 A2 EP 1631404A2 EP 04739509 A EP04739509 A EP 04739509A EP 04739509 A EP04739509 A EP 04739509A EP 1631404 A2 EP1631404 A2 EP 1631404A2
Authority
EP
European Patent Office
Prior art keywords
slot
gas
exit
channels
slots
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
EP04739509A
Other languages
German (de)
French (fr)
Other versions
EP1631404B1 (en
Inventor
Jürgen KUHLMANN
Werner SCHÖNWELSKI
Klaus Guido Ruwier
Werner Ritter
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.)
LWB Refractories GmbH
Original Assignee
LWB Refractories GmbH
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 LWB Refractories GmbH filed Critical LWB Refractories GmbH
Priority to PL04739509T priority Critical patent/PL1631404T3/en
Publication of EP1631404A2 publication Critical patent/EP1631404A2/en
Application granted granted Critical
Publication of EP1631404B1 publication Critical patent/EP1631404B1/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
    • C21C5/48—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
    • B22D1/002—Treatment with gases
    • B22D1/005—Injection assemblies therefor

Definitions

  • the present invention relates to a gas powder of a refractory material having an entrance surface and an exit surface, with channels of slot-shaped cross-section having an entrance slot and an exit slot, wherein the gas powder is formed as a truncated cone, at the ends of the entrance surface and the exit surface are arranged wherein the entry slits are disposed in the entry surface and the exit slits are in the exit surface, the channels extending between the entry surface and the exit surface, the slit cross sections of the channels being substantially radially outward from the truncated cone axis and the projection of the exit slit of a channel is offset to the entrance surface opposite the entrance slot of the channel.
  • Such gas powder are used in metallurgical melting vessels such as converters or pans to treat the melt contained therein by blowing gases, for example C0 2 .
  • the effluent gas should in particular lead to a turbulence and thus to a thorough mixing of the melt.
  • the gases flow through the inlet surface, which preferably faces the bottom of the metallurgical vessel, into the gas powder and exit at the exit surface.
  • the gas powder is integrated into the refractory lining of the melting vessel.
  • the gas powder may on the one hand be formed of a porous refractory material, so that the gas flows through the entire flusher and so it comes to a finely divided gas flow within the melt.
  • channels can also be arranged in the gas pulverizer, via which the gas is distributed in the melt.
  • a gas pulverizer which is frusto-conical and has parallel to the truncated cone extending slot-shaped channels, the cross sections have radially star-shaped outward. Furthermore, the channels taper towards the exit surface in such a way that the length of the slot-shaped cross section of the channels decreases.
  • a frusto-conical gas powder is known.
  • This has slot-shaped, parallel to the longitudinal axis of the truncated cone extending channels, each extending between an entrance surface and an exit surface.
  • the slot-shaped channels extend substantially in the radial direction as viewed towards the truncated cone axis, and the projection of the exit slot of a channel onto the entry surface is offset with respect to the entry slot of the channel.
  • a disadvantage of such a gas bubbler is that there is a risk that only a penetration of the gas takes place through the melt column located above the outlet opening. In such a case, there is no turbulence of the melt, but this remains essentially at rest. This leaves the desired mixing effect.
  • the present invention seeks to provide a gas powder, in which the gas exits in such a way that a good mixing of the melt is achieved and a simple penetration of the melt is avoided by the gas.
  • the channels are inclined relative to the truncated cone axis. This results in that the flow direction of the exiting gas is not perpendicular to the exit surface, but rather is inclined to this. Thus, the ferrostatic pressure is not perpendicular to the channels. This has the advantage that the risk of a simple penetration of the melt column located above the exit surface is reduced. On the other hand, a turbulence in the melt is caused by the oblique exit of the gas, so that particularly good An Albanyraten be achieved. The degree of turbulence is further increased by the gases with a "twist" emerge from the slots.
  • the projections of the exit slits on the entry surface are offset relative to the truncated cone axis in a uniform direction of rotation to the inlet slots, results in a rotationally symmetrical.es flow field of the exiting gases, which in turn to an effective turbulence of the melt in the region Gas purifier leads.
  • the rotationally symmetrical flow field leads to a rotating movement of the melt and there is a good mixing.
  • exit slots offset parallel to the entry slots, a simple production of inclined to the truncated cone channels is made possible.
  • a particularly good turbulence in the region of the gas purging device can be achieved if the outlet slots extend radially outward in a star shape from the truncated cone axis.
  • exit slots In order to achieve the largest possible total exit area while maintaining the rotational symmetry, it may be advantageous if the exit slots have different lengths.
  • the slot-shaped cross section of the channels has a constant length along its course. If a higher gas pressure in the region of the outlet slots is to be achieved, it is preferred, however, if the length of the slot-shaped cross section of the channels decreases from the inlet slot to the outlet slot. This may be necessary, in particular, if penetration of the melt into the channels is to be prevented.
  • the width of the slot-shaped cross section of the channels and the inlet and outlet slots between 0.125 and 0.5 mm. Then, on the one hand, there is no penetration of the melt into the channels and, on the other hand, a sufficiently large gas volume flow is ensured.
  • FIG. 1 shows a gas blower according to the invention according to a first embodiment in longitudinal section
  • FIG. 2 shows the outlet surface of a gas purging device according to the invention according to a first exemplary embodiment in plan view
  • FIG. 3 shows the entrance surface of a gas purging device according to the invention according to a first exemplary embodiment in plan view
  • Fig. 5 the exit surface of a gas purifier according to the invention according to another embodiment in plan view.
  • the gas blower 1 shown in Fig. 1 in longitudinal section along the line II in Fig. 2 has the shape of a truncated cone.
  • the gas bubbler 1 has an inlet surface 2 and an outlet surface 3, wherein both the inlet surface 2 and the outlet surface 3 extend perpendicular to the truncated cone axis 4.
  • the gas powder 1 consists of a refractory material, in particular of a refractory ceramic. Between the inlet surface 2 and the exit surface 3 run channels 5 with a slot-shaped cross-section.
  • the channels 5 each extend from an entry slot 6, which is arranged in the entry surface 2, to an exit slot 7, which is arranged in the exit surface 3.
  • the width of the cross section of the channels 5 perpendicular to its extension direction is between 0.125 and 0.5 mm.
  • the slot-shaped cross sections of the channels 5 point away from the truncated cone axis 4 substantially radially outwards, as can be seen from FIG.
  • the output slots 7 additionally extend radially star-shaped away from the truncated cone axis 4 to the outside.
  • the length of the slit-shaped cross section of the channels 5 is constant along its course.
  • the projections of the outlet slits 7 are offset relative to the entry surface 2 with respect to the entry slit 6 of each channel 5, so that the projection of the exit slit 7 does not coincide with the entry slit 6.
  • the channels 5 extend inclined to the truncated cone axis 4 and in particular obliquely impinge on the exit surface 3.
  • FIG. 3 shows that all projections of the exit slits 7 are offset to the left relative to the corresponding entry slits 6 in the exemplary embodiment shown and preferred so far. The projections are thus offset in a uniform direction of rotation relative to the truncated cone axis 4 to the inlet slots 6.
  • the projection of the exit slot 7 in each case runs parallel to the entry slot 6. If gas flows from the inlet surface 2 into the gas bubbler 1, it flows from the inlet slits 6 through the channels 5 to the outlet slits 7 arranged in the outlet surface 3.
  • the flow direction of the gas at the outlet slit 7 is inclined to the outlet surface 3
  • a simple penetration of the melt is avoided by the exiting gas, in which the melt would remain essentially at rest.
  • the illustrated in Fig. 4 second embodiment of a gas purging device 1 according to the invention differs from the previously illustrated by the fact that the extension length of the outlet slots 7 is reduced relative to the inlet slots 6.
  • the length of the slot-shaped cross section of the channels 5 decreases from the inlet slot 6 to the outlet slot 7. This results in the flow through the fact that the pressure at the outlet slot 7 is increased in comparison to the inlet slot 6 and penetration of the melt into the channels 5 is difficult.
  • a part of the channels 5 has outlet slots 7 'and inlet slots 6', which have a greater length than the other inlet and outlet slots 6, 7. This ensures that a larger overall exit area for the gas is created without disturbing the rotational symmetry in the area of the exit area 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Mechanical Engineering (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Gas Separation By Absorption (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • External Artificial Organs (AREA)

Abstract

A gas lance made of a fireproof material, having an entry surface and an exit surface, having channels having slit-shaped cross-section, which comprise an entry slit and an exit slit. In order to provide a gas lance in which the gas exits in such a manner that a good thorough mixing of the melt is achieved and a simple penetration of the melt by the gas is avoided, the projection of the exit slit of a channel onto the entry surface may be offset in relation to the entry slit of the channel.

Description

Gasspuler mit geneigten schlitzförmigen Kanälen Gas bubbler with inclined slot-shaped channels
Die vorliegende Erfindung betrifft einen Gasspuler aus einem feuerfesten Material, mit einer Eintrittsfläche und einer Austrittsfläche, mit Kanälen mit schlitzförmigem Querschnitt, die einen Eintrittsschlitz und einen Austrittsschlitz aufweisen, wobei der Gasspuler als Kegelstumpf ausgebildet ist, an dessen Enden die Eintrittsfläche und die Austrittsfläche angeordnet sind, wobei die Eintrittsschlitze in der Eintrittsfläche und die Austrittsschlitze in der Austrittsfläche angeordnet sind, wobei die Kanäle zwischen der Eintrittsfläche und der Austrittsfläche verlaufen, wobei die schlitzförmigen Querschnitte der Kanäle von der Kegelstumpfachse im Wesentlichen radial nach außen weisen und wobei die Projektion des Austrittsschlitzes eines Kanals auf die Eintrittsfläche gegenüber dem Eintrittsschlitz des Kanals versetzt ist.The present invention relates to a gas powder of a refractory material having an entrance surface and an exit surface, with channels of slot-shaped cross-section having an entrance slot and an exit slot, wherein the gas powder is formed as a truncated cone, at the ends of the entrance surface and the exit surface are arranged wherein the entry slits are disposed in the entry surface and the exit slits are in the exit surface, the channels extending between the entry surface and the exit surface, the slit cross sections of the channels being substantially radially outward from the truncated cone axis and the projection of the exit slit of a channel is offset to the entrance surface opposite the entrance slot of the channel.
Derartige Gasspuler werden in metallurgischen Schmelzgefäßen wie Konvertern oder Pfannen eingesetzt, um die darin enthaltene Schmelze durch Einblasen von Gasen, beispielsweise C02, zu behandeln. Das ausströmende Gas soll insbesondere zu einer Verwirbelung und damit zu einer Durchmischung der Schmelze führen. Die Gase strömen dabei über die Eintrittsfläche, die vorzugsweise dem Boden des metallurgischen Gefäßes zugewandt ist, in den Gasspuler ein und treten an der Austrittsfläche wieder aus. Dabei ist der Gasspuler in die feuerfeste Auskleidung des Schmelzgefäßes integriert. Der Gasspuler kann einerseits aus einem porösen feuerfesten Material ausgebildet sein, so dass das Gas durch den gesamten Spüler hindurchströmt und es so zu einer feinverteilten Gasströmung innerhalb der Schmelze kommt. Andererseits können in dem Gasspuler auch Kanäle angeordnet sein, über die das Gas in der Schmelze verteilt wird.Such gas powder are used in metallurgical melting vessels such as converters or pans to treat the melt contained therein by blowing gases, for example C0 2 . The effluent gas should in particular lead to a turbulence and thus to a thorough mixing of the melt. The gases flow through the inlet surface, which preferably faces the bottom of the metallurgical vessel, into the gas powder and exit at the exit surface. The gas powder is integrated into the refractory lining of the melting vessel. The gas powder may on the one hand be formed of a porous refractory material, so that the gas flows through the entire flusher and so it comes to a finely divided gas flow within the melt. On the other hand, channels can also be arranged in the gas pulverizer, via which the gas is distributed in the melt.
Aus der DE 36 25 117 Cl ist ein Gasspuler bekannt, der kegelstumpfförmig ausgebildet ist und parallel zur Kegelstumpfachse verlaufende schlitzförmige Kanäle aufweist, deren Querschnitte radial sternförmig nach außen weisen. Des Weiteren verjüngen sich die Kanäle zur Austrittsfläche hin in der Weise, dass die Länge des schlitzförmigen Querschnitts der Kanäle abnimmt.From DE 36 25 117 Cl a gas pulverizer is known, which is frusto-conical and has parallel to the truncated cone extending slot-shaped channels, the cross sections have radially star-shaped outward. Furthermore, the channels taper towards the exit surface in such a way that the length of the slot-shaped cross section of the channels decreases.
Aus der US 4,938,461, von der die vorliegende Erfindung ausgeht, ist ebenfalls ein kegelstumpfförmiger Gasspuler bekannt. Dieser weist schlitzförmige, parallel zur Längsachse des KegelStumpfs verlaufende Kanäle auf, die sich jeweils zwischen einer Eintrittsfläche und einer Austrittsfläche erstrecken. Die schlitzförmigen Kanäle erstrecken sich im Wesentlichen in zur Kegelstumpfachse gesehen radialer Richtung und die Projektion des Austrittsschlitzes eines Kanals auf die Eintrittsfläche ist gegenüber dem Eintrittsschlitz des Kanals versetzt.From US 4,938,461, from which the present invention proceeds, also a frusto-conical gas powder is known. This has slot-shaped, parallel to the longitudinal axis of the truncated cone extending channels, each extending between an entrance surface and an exit surface. The slot-shaped channels extend substantially in the radial direction as viewed towards the truncated cone axis, and the projection of the exit slot of a channel onto the entry surface is offset with respect to the entry slot of the channel.
Nachteilig an einem derartigen Gasspuler ist, dass die Gefahr besteht, dass lediglich eine Penetration des Gases durch die über der Austrittsöffnung befindliche Schmelzesäule stattfindet. In einem solchen Fall kommt es zu keiner Verwirbelung der Schmelze, sondern diese bleibt im Wesentlichen in Ruhe. Damit bleibt der erwünschte Mischeffekt aus. Ausgehend von diesem Stand der Technik liegt der vorliegenden Erfindung die Aufgabe zugrunde, einen Gasspuler bereitzustellen, bei dem das Gas in der Weise austritt, dass eine gute Durchmischung der Schmelze erreicht wird und eine einfache Penetration der Schmelze durch das Gas vermieden wird.A disadvantage of such a gas bubbler is that there is a risk that only a penetration of the gas takes place through the melt column located above the outlet opening. In such a case, there is no turbulence of the melt, but this remains essentially at rest. This leaves the desired mixing effect. Based on this prior art, the present invention seeks to provide a gas powder, in which the gas exits in such a way that a good mixing of the melt is achieved and a simple penetration of the melt is avoided by the gas.
Diese Aufgabe wird dadurch gelöst, dass die Projektionen der Austrittsschlitze auf die Eintrittsfläche relativ zur Kegelstumpfachse in einheitlichem Drehsinn zu den Eintrittsschlitzen versetzt sind.This object is achieved in that the projections of the outlet slots are offset from the entry surface relative to the truncated cone axis in a uniform direction of rotation to the inlet slots.
Dadurch, dass die Projektion des Austrittsschlitzes gegenüber dem Eintrittsschlitz versetzt ist, sind die Kanäle gegenüber der Kegelstumpfachse geneigt. Dies führt dazu, dass die Strömungsrichtung des austretenden Gases nicht senkrecht auf der Austrittsfläche steht, sondern vielmehr zu dieser geneigt ist . Damit steht der ferrostatische Druck nicht senkrecht zu den Kanälen. Dies hat zum einen den Vorteil, dass die Gefahr einer einfachen Penetration der sich oberhalb der Austrittsfläche befindlichen Schmelzesäule reduziert ist. Zum anderen wird durch den schrägen Austritt des Gases eine Verwirbelung in der Schmelze hervorgerufen, so dass besonders gute Anspülraten erreicht werden. Der Grad der Verwirbelung wird außerdem noch dadurch erhöht, dass die Gase mit einem „Drall" aus den Schlitzen austreten.Characterized in that the projection of the exit slot is offset from the entry slot, the channels are inclined relative to the truncated cone axis. This results in that the flow direction of the exiting gas is not perpendicular to the exit surface, but rather is inclined to this. Thus, the ferrostatic pressure is not perpendicular to the channels. This has the advantage that the risk of a simple penetration of the melt column located above the exit surface is reduced. On the other hand, a turbulence in the melt is caused by the oblique exit of the gas, so that particularly good Anspülraten be achieved. The degree of turbulence is further increased by the gases with a "twist" emerge from the slots.
Wenn die Projektionen der Austrittsschlitze auf die Eintrittsfläche relativ zur Kegelstumpfachse in einheitlichem Drehsinn zu den Eintrittsschlitzen versetzt sind, ergibt sich ein rotationssymmetrisch.es Strömungsfeld der austretenden Gase, was wiederum zu einer effektiven Verwirbelung der Schmelze im Bereich des Gasspülers führt. Insbesondere führt das rotationssymmetrische Strömungsfeld zu einer rotierenden Bewegung der Schmelze und es kommt zu einer guten Durchmischung .If the projections of the exit slits on the entry surface are offset relative to the truncated cone axis in a uniform direction of rotation to the inlet slots, results in a rotationally symmetrical.es flow field of the exiting gases, which in turn to an effective turbulence of the melt in the region Gas purifier leads. In particular, the rotationally symmetrical flow field leads to a rotating movement of the melt and there is a good mixing.
Sind die Austrittsschlitze parallel zu den Eintrittsschlitzen versetzt, wird eine einfache Herstellung der zur Kegelstumpfachse geneigten Kanäle ermöglicht .If the exit slots offset parallel to the entry slots, a simple production of inclined to the truncated cone channels is made possible.
Eine besonders gute Verwirbelung im Bereich des Gasspülers kann dann erreicht werden, wenn die Austrittsschlitze sich radial sternförmig nach außen von der Kegelstumpfachse erstrecken.A particularly good turbulence in the region of the gas purging device can be achieved if the outlet slots extend radially outward in a star shape from the truncated cone axis.
Um eine möglichst große Gesamtaustrittsfläche unter Beibehaltung der Rotationssymmetrie zu erreichen, kann es vorteilhaft sein, wenn die Austrittsschlitze unterschiedliche Längen aufweisen.In order to achieve the largest possible total exit area while maintaining the rotational symmetry, it may be advantageous if the exit slots have different lengths.
Ist ein möglichst großer Gasvolumenstrom erforderlich, ist es vorteilhaft, wenn der schlitzförmige Querschnitt der Kanäle entlang ihres Verlaufs eine konstante Länge aufweist. Soll ein höherer Gasdruck im Bereich der Austrittsschlitze erreicht werden, ist es hingegen bevorzugt, wenn die Länge des schlitzförmigen Querschnitts der Kanäle vom Eintrittsschlitz zum Austrittsschlitz hin abnimmt. Dies kann insbesondere dann erforderlich sein, wenn ein Eindringen der Schmelze in die Kanäle verhindert werden soll .If the largest possible gas volume flow is required, it is advantageous if the slot-shaped cross section of the channels has a constant length along its course. If a higher gas pressure in the region of the outlet slots is to be achieved, it is preferred, however, if the length of the slot-shaped cross section of the channels decreases from the inlet slot to the outlet slot. This may be necessary, in particular, if penetration of the melt into the channels is to be prevented.
Ferner hat es sich als vorteilhaft erwiesen, wenn die Breite des schlitzförmigen Querschnitts der Kanäle sowie der Eintritts- und Austrittsschlitze zwischen 0,125 und 0,5 mm beträgt. Dann kommt es einerseits nicht zu einem Eindringen der Schmelze in die Kanäle und andererseits ist ein hinreichend großer Gasvolumenstrom gewährleistet .Furthermore, it has proven to be advantageous if the width of the slot-shaped cross section of the channels and the inlet and outlet slots between 0.125 and 0.5 mm. Then, on the one hand, there is no penetration of the melt into the channels and, on the other hand, a sufficiently large gas volume flow is ensured.
Die vorliegende Erfindung wird nachfolgend anhand einer lediglich bevorzugte Ausführungsbeispiele darstellenden Zeichnung erläutert. In der Zeichnung zeigen:The present invention will be explained below with reference to a purely preferred embodiments illustrative drawing. In the drawing show:
Fig. 1 einen erfindungsgemäßen Gasspuler gemäß einem ersten Ausführungsbeispiel im Längsschnitt,1 shows a gas blower according to the invention according to a first embodiment in longitudinal section,
Fig. 2 die Austrittsfläche eines erfindungsgemäßen Gasspülers gemäß einem ersten Ausführungsbeispiel in Draufsicht,2 shows the outlet surface of a gas purging device according to the invention according to a first exemplary embodiment in plan view,
Fig. 3 die Eintrittsfläche eines erfindungsgemäßen Gasspülers gemäß einem ersten Ausführungsbeispiel in Draufsicht,3 shows the entrance surface of a gas purging device according to the invention according to a first exemplary embodiment in plan view,
Fig. 4 die Austrittsfläche eines erfindungsgemäßen Gasspülers gemäß einem zweiten Ausführungsbeispiel in Draufsicht undFig. 4, the exit surface of a gas purging device according to the invention according to a second embodiment in plan view and
Fig. 5 die Austrittsfläche eines erfindungsgemäßen Gasspülers gemäß einem weiteren Ausführungsbeispiel in Draufsicht.Fig. 5, the exit surface of a gas purifier according to the invention according to another embodiment in plan view.
Der in Fig. 1 im Längsschnitt entlang der Linie I-I in Fig. 2 dargestellte Gasspuler 1 hat die Form eines Kegelstumpfes. Der Gasspuler 1 weist eine Eintrittsfläche 2 und eine Austrittsfläche 3 auf, wobei sowohl die Eintrittsfläche 2 als auch die Austrittsfläche 3 senkrecht zur Kegelstumpfachse 4 verlaufen. Der Gasspuler 1 besteht dabei aus einem feuerfesten Material, insbesondere aus einer feuerfesten Keramik. Zwischen der Eintrittsfläche 2 und der Austrittsfläche 3 verlaufen Kanäle 5 mit einem schlitzförmigen Querschnitt. Die Kanäle 5 verlaufen jeweils von einem Eintrittsschlitz 6, der in der Eintrittsfläche 2 angeordnet ist, bis zu einen Austrittsschlitz 7, der in der Austrittsfläche 3 angeordnet ist. Die Breite des Querschnitts der Kanäle 5 senkrecht zu seiner Erstreckungsrichtung liegt zwischen 0.125 und 0.5 mm. Die schlitzförmigen Querschnitte der Kanäle 5 weisen im Wesentlichen radial nach außen von der Kegelstumpfachse 4 weg, wie aus Fig. 2 hervorgeht. In dem in den Fig. 1 bis 3 dargestellten Ausführungsbeispiel erstrecken sich die Ausgangsschlitze 7 zusätzlich radial sternförmig von der Kegelstumpfachse 4 weg nach außen. Außerdem ist die Länge des schlitzförmigen Querschnitts der Kanäle 5 entlang ihres Verlaufes konstant.The gas blower 1 shown in Fig. 1 in longitudinal section along the line II in Fig. 2 has the shape of a truncated cone. The gas bubbler 1 has an inlet surface 2 and an outlet surface 3, wherein both the inlet surface 2 and the outlet surface 3 extend perpendicular to the truncated cone axis 4. The gas powder 1 consists of a refractory material, in particular of a refractory ceramic. Between the inlet surface 2 and the exit surface 3 run channels 5 with a slot-shaped cross-section. The channels 5 each extend from an entry slot 6, which is arranged in the entry surface 2, to an exit slot 7, which is arranged in the exit surface 3. The width of the cross section of the channels 5 perpendicular to its extension direction is between 0.125 and 0.5 mm. The slot-shaped cross sections of the channels 5 point away from the truncated cone axis 4 substantially radially outwards, as can be seen from FIG. In the embodiment shown in FIGS. 1 to 3, the output slots 7 additionally extend radially star-shaped away from the truncated cone axis 4 to the outside. In addition, the length of the slit-shaped cross section of the channels 5 is constant along its course.
Wie Fig. 3 zu entnehmen ist, sind die Projektionen der Austrittsschlitze 7 auf die Eintrittsfläche 2 gegenüber dem Eintrittsschlitz 6 eines jeden Kanals 5 versetzt, so dass die Projektion des Austrittsschlitzes 7 jeweils nicht mit dem Eintrittsschlitz 6 zusammenfällt. Daraus resultiert, dass die Kanäle 5 geneigt zur Kegelstumpfachse 4 verlaufen und insbesondere schräg auf die Austrittsfläche 3 auftreffen. Fig. 3 zeigt zudem, dass im dargestellten und insoweit bevorzugten Ausführungsbeispiel alle Projektionen der Austrittsschlitze 7 jeweils nach links relativ zu den korrespondierenden Eintrittsschlitzen 6 versetzt sind. Die Projektionen sind somit in einem einheitlichen Drehsinn relativ zur Kegelstumpfachse 4 zu den Eintrittsschlitzen 6 versetzt. Außerdem verläuft die Projektion des Austrittsschlitzes 7 jeweils parallel zum Eintrittsschlitz 6. Strömt Gas von der Eintrittsfläche 2 in den Gasspuler 1 ein, so strömt dieses von den Eintrittsschlitzen 6 durch die Kanäle 5 zu den in der Austrittsfläche 3 angeordneten Austrittsschlitzen 7. Dabei ist die Strömungsrichtung des Gases am Austrittschlitz 7 geneigt zur Austrittsfläche 3. Aufgrund des einheitlichen Drehsinns, mit dem die Projektionen der Austrittsschlitze 7 gegenüber den Eintrittsschlitzen 6 versetzt sind, kommt es außerdem zu einem rotationssymmetrischen Strδmungsfeld oberhalb der Austrittsfläche 3, was zu einer rotierenden Bewegung der Schmelze in diesem Bereich führt. Diese rotierende Bewegung führt zu einer guten Durchmischung der Schmelze. Außerdem wird eine einfache Penetration der Schmelze durch das austretende Gas vermieden, bei der die Schmelze im Wesentlichen in Ruhe bliebe.As can be seen from FIG. 3, the projections of the outlet slits 7 are offset relative to the entry surface 2 with respect to the entry slit 6 of each channel 5, so that the projection of the exit slit 7 does not coincide with the entry slit 6. As a result, the channels 5 extend inclined to the truncated cone axis 4 and in particular obliquely impinge on the exit surface 3. In addition, FIG. 3 shows that all projections of the exit slits 7 are offset to the left relative to the corresponding entry slits 6 in the exemplary embodiment shown and preferred so far. The projections are thus offset in a uniform direction of rotation relative to the truncated cone axis 4 to the inlet slots 6. In addition, the projection of the exit slot 7 in each case runs parallel to the entry slot 6. If gas flows from the inlet surface 2 into the gas bubbler 1, it flows from the inlet slits 6 through the channels 5 to the outlet slits 7 arranged in the outlet surface 3. The flow direction of the gas at the outlet slit 7 is inclined to the outlet surface 3 Direction of rotation with which the projections of the outlet slots 7 are offset from the inlet slots 6, it also leads to a rotationally symmetrical flow field above the exit surface 3, which leads to a rotating movement of the melt in this area. This rotating movement leads to a good mixing of the melt. In addition, a simple penetration of the melt is avoided by the exiting gas, in which the melt would remain essentially at rest.
Das in Fig. 4 dargestellte zweite Ausführungsbeispiel eines erfindungsgemäßen Gasspülers 1 unterscheidet sich von dem vorher Dargestellten dadurch, dass die Erstreckungslänge der Austrittsschlitze 7 gegenüber der der Eintrittsschlitze 6 reduziert ist. Damit nimmt die Länge des schlitzförmigen Querschnitts der Kanäle 5 vom Eintrittsschlitz 6 zum Austrittsschlitz 7 ab. Dies führt beim Durchströmen dazu, dass der Druck am Austrittsschlitz 7 im Vergleich zum Eintrittsschlitz 6 erhöht ist und ein Eindringen der Schmelze in die Kanäle 5 erschwert wird.The illustrated in Fig. 4 second embodiment of a gas purging device 1 according to the invention differs from the previously illustrated by the fact that the extension length of the outlet slots 7 is reduced relative to the inlet slots 6. Thus, the length of the slot-shaped cross section of the channels 5 decreases from the inlet slot 6 to the outlet slot 7. This results in the flow through the fact that the pressure at the outlet slot 7 is increased in comparison to the inlet slot 6 and penetration of the melt into the channels 5 is difficult.
Bei dem dritten, in Fig. 5 dargestellten Ausführungsbeispiel weist ein Teil der Kanäle 5 Austrittsschlitze 7' und Eintrittsschlitze 6' auf, die im Vergleich zu den übrigen Eintritts- und Austrittsschlitzen 6, 7 eine größere Länge aufweisen. Hierdurch wird erreicht, dass eine größere Gesamtaustrittsfläche für das Gas geschaffen wird, ohne dabei die Rotationssymmetrie im Bereich der Austrittsfläche 3 zu stören. In the third exemplary embodiment illustrated in FIG. 5, a part of the channels 5 has outlet slots 7 'and inlet slots 6', which have a greater length than the other inlet and outlet slots 6, 7. This ensures that a larger overall exit area for the gas is created without disturbing the rotational symmetry in the area of the exit area 3.

Claims

P AT E NTAN S P RÜ C H E P AT E NTAN SP RU CHE
1. Gasspuler aus einem feuerfesten Material, mit einer Eintrittsfläche und einer Austrittsfläche, mit Kanälen mit schlitzförmigem Querschnitt, die einen Eintrittsschlitz und einen Austrittsschlitz aufweisen, wobei der Gasspuler als Kegelstumpf ausgebildet ist, an dessen Enden die Eintrittsfläche und die Austrittsfläche angeordnet sind, wobei die Eintrittsschlitze in der Eintritts läche und die Austrittsschlitze in der Austrittsfläche angeordnet sind, wobei die Kanäle zwischen der Eintrittsfläche und der Austrittsfläche verlaufen, wobei die schlitzförmigen Querschnitte der Kanäle von der Kegelstumpfachse im Wesentlichen radial nach außen weisen und wobei die Projektion des Austrittsschlitzes eines Kanals auf die Eintrittsfläche gegenüber dem Eintrittsschlitz des Kanals versetzt ist, d a du r c h g e k e n n z e i c h n e t, d a s s die Projektionen der Austrittsschlitze (7) auf die Eintrittsfläche (2) relativ zur Kegelstumpfachse (4) in einheitlichem Drehsinn zu den Eintrittsschlitzen (6) versetzt sind.A gas flasher of a refractory material, having an entrance surface and an exit surface, with channels of slit-shaped cross-section, having an entry slot and an exit slot, the gas coiler being formed as a truncated cone, at the ends of which the entry surface and the exit surface are arranged Entry slots in the entrance surface and the exit slots are arranged in the exit surface, wherein the channels between the entry surface and the exit surface, wherein the slot-shaped cross sections of the channels from the truncated cone axis substantially radially outward and wherein the projection of the exit slit of a channel on the Entrance surface is offset from the entrance slot of the channel, as characterized hchgekennzeichnet that the projections of the exit slits (7) on the entrance surface (2) relative to the truncated cone axis (4) in a uniform direction of rotation to the Ein truncation slots (6) are offset.
2. Gasspuler nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, d a s s die Projektionen der Austrittsschlitze (7) auf die Eintrittsfläche (2) parallel zu den Eintrittsschlitzen (6) versetzt sind. 2. Gas blower according to claim 1, characterized in that the projections of the outlet slots (7) on the entry surface (2) are offset parallel to the inlet slots (6).
3. Gasspuler nach Anspruch 1 oder 2 , d a d u r c h g e k e n n z e i c h n e t, d a s s sich die Austrittschlitze (7) radial sternförmig nach außen von der Kegelstumpfachse (4) erstrecken.3. Gas bubbler according to claim 1 or 2, d a d u r c h e c e n e c e s in that the outlet slots (7) radially outwardly extend radially outward from the truncated cone axis (4).
4. Gasspuler nach einem der Ansprüche 1 bis 3, d a d u r c h g e k e n n z e i c h n e t, d a s s die Austrittschlitze (7) unterschiedliche Längen aufweisen.4. Gas bubbler according to one of claims 1 to 3, d a d u r c h e k e n e c i n e t e, s e s the outlet slots (7) have different lengths.
5. Gasspuler nach einem der Ansprüche 1 bis 4, d a d u r c h g e k e n n z e i c h n e t, d a s s der schlitzförmige Querschnitt der Kanäle (5) entlang ihres Verlaufs eine konstante Länge aufweist .5. Gas bubbler according to one of claims 1 to 4, d a d u r c h e c e n e c e s in that the slot-shaped cross-section of the channels (5) has a constant length along its course.
6. Gasspuler nach einem der Ansprüche 1 bis 4, d a d u r c h g e k e n n z e i c h n e t, d a s s die Länge des schlitzförmigen Querschnitts der Kanäle (5) vom Eintrittsschlitz (6) zum Austrittsschlitz (7) abnimmt.6. Gas blower according to one of claims 1 to 4, d a d u r c h e c e n e c e n e, that s a the length of the slot-shaped cross section of the channels (5) from the inlet slot (6) to the outlet slot (7) decreases.
7. Gasspuler nach einem der Ansprüche 1 bis 6, d a d u r c h g e k e n n z e i c h n e t, d a s s die Breite des schlitzförmigen Querschnitts der Kanäle (5) sowie der Eintritts- und Austrittsschlitze (6,7) zwischen 0,125 mm und 0,5 mm beträgt. 7. The gas bubbler according to claim 1, wherein the width of the slot-shaped cross section of the channels and the inlet and outlet slots is between 0.125 mm and 0.5 mm.
EP04739509A 2003-06-06 2004-06-02 Gas rinser with suitable slot-shaped canals Expired - Lifetime EP1631404B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04739509T PL1631404T3 (en) 2003-06-06 2004-06-02 Gas rinser with suitable slot-shaped canals

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10326113A DE10326113B3 (en) 2003-06-06 2003-06-06 Gasspüler with inclined slit-shaped channels
PCT/EP2004/005925 WO2004108328A2 (en) 2003-06-06 2004-06-02 Gas rinser with suitable slot-shaped canals

Publications (2)

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EP1631404A2 true EP1631404A2 (en) 2006-03-08
EP1631404B1 EP1631404B1 (en) 2006-12-13

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EP (1) EP1631404B1 (en)
CN (1) CN100360260C (en)
AT (1) ATE347950T1 (en)
DE (2) DE10326113B3 (en)
ES (1) ES2279382T3 (en)
PL (1) PL1631404T3 (en)
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US7377497B2 (en) * 2005-09-16 2008-05-27 Philadelphia Gear Corporation Aeration system and method
KR102504133B1 (en) * 2018-02-20 2023-02-28 삼성디스플레이 주식회사 Display apparatus and the fabrication method thereof

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DE3625117C1 (en) * 1986-07-25 1987-11-26 Didier Werke Ag Gas-flushing cone
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US20040245683A1 (en) 2004-12-09
WO2004108328A3 (en) 2005-03-10
ES2279382T3 (en) 2007-08-16
TWI324183B (en) 2010-05-01
DE502004002317D1 (en) 2007-01-25
CN1809434A (en) 2006-07-26
CN100360260C (en) 2008-01-09
ATE347950T1 (en) 2007-01-15
US20060220282A1 (en) 2006-10-05
TW200523371A (en) 2005-07-16
DE10326113B3 (en) 2004-12-16
US7384593B2 (en) 2008-06-10
WO2004108328A2 (en) 2004-12-16
EP1631404B1 (en) 2006-12-13
PL1631404T3 (en) 2007-05-31

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