WO1996000798A1 - Nozzle system for a device for melting iron metallic materials in a coke-heated cupola furnace - Google Patents
Nozzle system for a device for melting iron metallic materials in a coke-heated cupola furnace Download PDFInfo
- Publication number
- WO1996000798A1 WO1996000798A1 PCT/EP1995/002430 EP9502430W WO9600798A1 WO 1996000798 A1 WO1996000798 A1 WO 1996000798A1 EP 9502430 W EP9502430 W EP 9502430W WO 9600798 A1 WO9600798 A1 WO 9600798A1
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- WO
- WIPO (PCT)
- Prior art keywords
- furnace
- nozzle
- nozzle system
- water
- mouthpiece
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/10—Details, accessories or equipment specially adapted for furnaces of these types
- F27B1/16—Arrangements of tuyeres
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B11/00—Making pig-iron other than in blast furnaces
- C21B11/02—Making pig-iron other than in blast furnaces in low shaft furnaces or shaft furnaces
Definitions
- the invention relates to a device for melting ferrous metal materials in a coke-heated Koppo furnace for the production of cast iron according to main patent P 4301322.8.
- the device which feeds the furnace gas and oxygen through the nozzle system above the hearth ensures the setting of the desired furnace atmosphere and the metallurgical effects.
- the furnace jacket in the region of the nozzle action direction is designed as a dome-like extension and the oxygen lances guided centrally in the nozzles are at a controllable distance from the furnace jacket.
- the suction device is an ejector. This ensures that the furnace gas mixes with the oxygen at the nozzle mouth and converts CO + O2 into CO2.
- This nozzle system with its dome-like extension which can only be realized technically with a greater delivery effort, increases the cross-section of the shaft of the cupola furnace and leads to a higher melting capacity, but does not prevent deposits of the pouring column in the dome discontinuous melting process result.
- the present invention relates to a further embodiment of the nozzle system for a device for melting ferrous metal materials in a coke-heated cupola furnace for the production of cast iron according to the main patent application P 4301322.8, which guarantees a continuous melting process with less delivery effort.
- Driving nozzle burners with a nozzle protrusion of at least 10 mm are arranged, which consist of a water-cooled muzzle, a water-cooled ejector center piece and a head piece with a centrically guided driving nozzle and above that at a distance of 0.5 to 2 times the clear Furnace cross section each water-cooled oxygen lances are guided.
- the threefold division of the jet nozzle burner makes it easy to replace the orifice piece during the melting process or, if the orifice pieces are slagged due to melting technology, for example if the slag level in the furnace is too high, also during the melting process by the revision openings are to be cleaned.
- the driving nozzle burners are dimensioned technically so that the flow velocity at the nozzle mouth is greater than the ignition velocity of the cycle gas-oxygen mixture.
- the flow velocity at the nozzle mouth is 120 to 150 m / s, but can be increased to 300 m / s by constructive changes in the mouth and driving nozzle cross-section.
- the ignition speed of the cycle gas is ⁇ 40 m / s.
- a protective layer of CaO with a lubricating effect is deposited in the circulating gas line and in the three assemblies of the propulsion nozzle burners.
- an equilibrium is created between the abrasion of the abrasive coke puddle and the CaO protective layer that builds up, which guarantees a certain layer thickness of the CaO in the driving nozzles. This leads to a minimization of the abrasive wear on the three assemblies, and the driving nozzle burners can therefore advantageously also be used in long-term operation to convey furnace gas (recycle gas) mixed with abrasive components and in high-temperature areas.
- each cycle gas supply line has a heating device.
- the heating can take place electrically and / or by means of hot gases (radiation principle).
- a metallurgical and thermal optimization of the melting process is achieved by the nozzle protrusion of at least 10 mm into the melting zone, because this places the hot nozzle opening in the interior of the shaft furnace. Due to the CO post-combustion of the cycle gas by means of oxygen, temperatures of> 2000 ° Celsius are reached at the nozzle mouth zone. The thermal load on the refractory material in the melting zone area is also reduced.
- the melting zone which is restricted in the recycle gas system, is expanded again by the oxygen lances arranged above the motive nozzle burners. These oxygen lances can be delivered as required. It follows that the furnace as a whole can be regulated more precisely as required.
- an oxygen core jet is created in the actual oxygen-cycle mixture, which is based on the higher velocities> the outlet velocity of the oxygen-cycle gas mixture in the interior of the bed with the carbon of the filling coke to CO2 and CO according to the Boudouard
- the mouthpiece and the ejector centerpiece of the propellant nozzle burner have a separate water cooling system.
- the water cooling of the mouthpiece has the task of a combined chemo-thermal wear of the Prevent the mouthpiece in the high-temperature area of the furnace from slag and iron by forming a protective slag layer around the part that protrudes unprotected into the bulk of the nozzle, because the heat is dissipated by the water cooling.
- the water cooling of the ejector center piece is essential in order to prevent the propellant nozzle burners from heating up in this area to the ignition temperature of the cycle gas / oxygen mixture. If the amount of cooling water in a propellant nozzle burner is undershot, the oxygen supply to all propellant nozzles is interrupted, and the amount of circulating gas for everyone
- the propellant nozzle burner can be regulated by measuring the differential pressure (measuring the CO, CO 2 content and the cycle gas temperature) in each cycle gas supply line by changing the position of the associated flap.
- differential pressure measuring the CO, CO 2 content and the cycle gas temperature
- Figure 2 Side view of the nozzle system with a vertically arranged tubular ejector center piece and an integrated oxygen lance in the mouthpiece
- Figure 3 Top view of the nozzle system with a horizontally arranged tubular ejector center piece and an integrated oxygen lance in the mouthpiece
- FIG. 1 shows the side view of the nozzle system according to the invention. It is shown that the propellant nozzle burner, which consists of an orifice piece 22, an ejector center piece 23 and a head piece 24 with a centrally guided propellant nozzle 25, runs horizontally with a nozzle protrusion of 90 mm through the furnace jacket 17 and that Refractory material 20 is arranged and above it is a water-cooled oxygen lance 29 at a distance of 1.5 times the clear furnace cross section.
- the head piece 24 has an inspection opening 26 and is connected to the cycle gas supply line 14, which has a controllable flap (not shown).
- the mouthpiece 22 and the ejector center piece 23 have a separate water cooling 27; 28.
- FIG. 1 shows the side view of the nozzle system according to the invention. It is shown that the propellant nozzle burner, which consists of an orifice piece 22, an ejector center piece 23 and a head piece 24 with a centrally guided propellant nozzle 25, runs horizontally with a nozzle protrusion of
- FIG. 2 is the side view of the nozzle system according to the invention with a tubular ejector center piece 23 and the water cooling 28 and an oxygen lance 12 integrated in the mouth piece 22 with wall contact, which extends into the furnace shaft 15 to the inside of the refractory material 20 , shown.
- the mouthpiece 22 has the water cooling 27.
- An oxygen lance 29 is arranged parallel to the mouthpiece 22 at a distance of 1.5 times the clear furnace cross section.
- Characteristic of this A variant of the nozzle system is that the inspection opening 26 is arranged at the end of the cycle gas supply line 14.
- Figure 3 shows the top view of the nozzle system with a horizontally arranged tubular ejector center piece and an integrated oxygen lance in the mouthpiece. It can be seen that the driving nozzle burner is guided centrally to the furnace axis 21.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
Description
Düsensystem für eine Einrichtung zum Schmelzen von eisenmetallischen Werkstoffen in einem koksbeheiztenNozzle system for a device for melting ferrous metal materials in a coke-heated
Kupolofencupola
Beschreibungdescription
Die Erfindung betrifft eine Einrichtung zum Schmelzen von eisenmetallischen Werkstoffen in einem koksbeheizten Ku- polofen zur Herstellung von Gußeisen nach Hauptpatent P 4301322.8.The invention relates to a device for melting ferrous metal materials in a coke-heated Koppo furnace for the production of cast iron according to main patent P 4301322.8.
Die Einrichtung, welche das Ofengas und den Sauerstoff durch das oberhalb des Herdes liegende Düsensystem zu¬ führt, gewährleistet die Einstellung der gewünschten Ofenatmosphäre und der-metallurgischen Wirkungen.The device which feeds the furnace gas and oxygen through the nozzle system above the hearth ensures the setting of the desired furnace atmosphere and the metallurgical effects.
Hierzu ist der Ofenmantel im Bereich der Düsenwirkungs¬ richtung als kalottenartige Erweiterung gestaltet und die in den Düsen zentrisch geführten Sauerstofflanzen haben einen regelbaren Abstand zum Ofenmantel. Charakteristisch für die im Hauptpatent beschriebene Aus¬ führungsform ist auch, daß die Absaugeinrichtung ein Ejek- tor ist. Dadurch wird erreicht, daß sich bereits an der Düsenmündung das Ofengas mit dem Sauerstoff vermischt und eine Umsetzung von CO + O2 in CO2 einsetzt. Dieses Düsensystem mit seiner kalottenartigen Erweiterung, das technisch nur mit einem größeren Zustellungsaufwand realisiert werden kann, vergrößert 'zwar den Schachtquer¬ schnitt des Kupolofens und führt zu einer höheren Schmelz¬ leistung, verhindert jedoch nicht Ablagerungen der Schütt- säule in der Kalotte, die einen diskontinuierlichen Schmelzprozeß zur Folge haben.For this purpose, the furnace jacket in the region of the nozzle action direction is designed as a dome-like extension and the oxygen lances guided centrally in the nozzles are at a controllable distance from the furnace jacket. It is also characteristic of the embodiment described in the main patent that the suction device is an ejector. This ensures that the furnace gas mixes with the oxygen at the nozzle mouth and converts CO + O2 into CO2. This nozzle system with its dome-like extension, which can only be realized technically with a greater delivery effort, increases the cross-section of the shaft of the cupola furnace and leads to a higher melting capacity, but does not prevent deposits of the pouring column in the dome discontinuous melting process result.
Die vorliegende Erfindung betrifft eine weitere Ausfüh¬ rungsform des Düsensystems für eine Einrichtung zum Schmelzen von eisenmetallischen Werkstoffen in einem koks- beheizten Kupolofen zur Herstellung von Gußeisen gemäß der Hauptpatentanmeldung P 4301322.8, welche mit einem gerin¬ geren Zustellungsaufwand einen kontinuierlichen Schmelz¬ prozeß garantiert. Erreicht wird dies dadurch, daß gleich¬ mäßig über den Ofenumfang verteilt, durch den Ofenmantel und das Feuerfestmaterial waagerecht oder zum Herd geneigt und zentrisch oder tangential zur Ofenachse mehrere Treibdüsenbrenner mit einem Düsenüberstand von mindestens 10 mm angeordnet sind, die aus einem wassergekühlten Mün¬ dungsstück, aus einem wassergekühlten Ejektor-Mittelstück sowie aus einem Kopfstück mit einer zentrisch geführten Treibdüse bestehen und oberhalb dazu im Abstand des 0,5 bis 2-fachen des lichten Ofenςuerschnittes jeweils was¬ sergekühlte Sauerstofflanzen geführt sind. Durch die Dreiteilung der Treibdüsenbrenner ist ein ein¬ faches Austauschen des Mündungsstückes während des Schmelzprozesses möglich bzw. kann bei einer schmelztech¬ nisch bedingten Verschlackung der Mündungsstücke, bei¬ spielsweise bei zu hohem Schlackespiegel im Ofen, eben¬ falls während des Schmelzprozesses durch die Revisions¬ öffnungen eine Säuberung vorgenommen werden. Die Treibdü- senbrenner sind technisch so dimensioniert, daß die Strö¬ mungsgeschwindigkeit an der Düsenmündung größer als die Zündgeschwindigkeit des Kreislaufgas-Sauerstoffgemisches ist. Die Strömungsgeschwindigkeit an der Düsenmündung be¬ trägt 120 bis 150 m/s, kann aber durch konstruktive Verän- derungen des Mündungs- und Treibdüsenquerschnittes auf 300 m/s erhöht werden. Die Zündgeschwindigkeit des Kreis¬ laufgases beträgt < 40 m/s. Durch d e Förderung des Kreislaufgases, welches Anteile an CaO enthält, lagert sich in der Kreislaufgasleitung und in den drei Baugrup- pen der Treibdüsenbrenner eine schmierend wirkende Schutz¬ schicht aus CaO ab. Bei längerem Betrieb entsteht zwischen dem Abrieb des abrasiv wirkenden Koksgruses und der sich aufbauenden CaO-Schutzschicht ein Gleichgewicht, das eine bestimmte Schichtdicke des CaO in den Treibdüsen garan- tiert. Dies führt zur Minimierung des abrasiven Ver¬ schleißes an den drei Baugruppen, und damit sind die Treibdüsenbrenner vorteilhafterweise auch im Langzeitbe¬ trieb zur Förderung von mit abrasiven Bestandteilen ver¬ setztem Ofengas (Kreislaufgas) und in Hochtemperaturberei- chen einsetzbar.The present invention relates to a further embodiment of the nozzle system for a device for melting ferrous metal materials in a coke-heated cupola furnace for the production of cast iron according to the main patent application P 4301322.8, which guarantees a continuous melting process with less delivery effort. This is achieved in that evenly distributed over the circumference of the furnace, horizontally through the furnace shell and the refractory material or inclined towards the stove and several centrally or tangentially to the furnace axis Driving nozzle burners with a nozzle protrusion of at least 10 mm are arranged, which consist of a water-cooled muzzle, a water-cooled ejector center piece and a head piece with a centrically guided driving nozzle and above that at a distance of 0.5 to 2 times the clear Furnace cross section each water-cooled oxygen lances are guided. The threefold division of the jet nozzle burner makes it easy to replace the orifice piece during the melting process or, if the orifice pieces are slagged due to melting technology, for example if the slag level in the furnace is too high, also during the melting process by the revision openings are to be cleaned. The driving nozzle burners are dimensioned technically so that the flow velocity at the nozzle mouth is greater than the ignition velocity of the cycle gas-oxygen mixture. The flow velocity at the nozzle mouth is 120 to 150 m / s, but can be increased to 300 m / s by constructive changes in the mouth and driving nozzle cross-section. The ignition speed of the cycle gas is <40 m / s. By pumping the circulating gas, which contains portions of CaO, a protective layer of CaO with a lubricating effect is deposited in the circulating gas line and in the three assemblies of the propulsion nozzle burners. During long periods of operation, an equilibrium is created between the abrasion of the abrasive coke puddle and the CaO protective layer that builds up, which guarantees a certain layer thickness of the CaO in the driving nozzles. This leads to a minimization of the abrasive wear on the three assemblies, and the driving nozzle burners can therefore advantageously also be used in long-term operation to convey furnace gas (recycle gas) mixed with abrasive components and in high-temperature areas.
Zur Gewährleistung der Funktionssicherheit des Düsensy- stems sind Unterschreitungen des Kondensationspunktes des Kreislaufgases während des Kreislaufgastransportes von der Absaugebene zu den Treibdüsenbrennern zu vermeiden. Des¬ halb hat jede Kreislaufgaszuführungsleitung eine Behei- zungseinrichtung. Die Beheizung kann elektrisch und/oder mittels heißer Gase (Radiationsprizip) erfolgen. Eine metallurgische und wärmetechnische Optimierung des Schmelzprozesses wird durch den Düsenüberstand von minde¬ stens 10 mm in die Schmelzzone erreicht, weil dadurch die heiße Düsenmündungsöffnung in das Schüttungsinnere des Schachtofens verlegt wird. Auf Grund der CO-Nachverbren- nung des Kreislaufgases mittels Sauerstoff werden an der Düsenmündungszone Temperaturen von > 2000° Celsius er¬ reicht. Ebenfalls verringert sich die thermische Belastung des Feuerfestmaterials im SchmelzZonenbereich. DieTo ensure the functional reliability of the nozzle system Stems should be avoided to fall below the condensation point of the cycle gas during the cycle gas transport from the suction level to the propellant nozzle burners. Therefore, each cycle gas supply line has a heating device. The heating can take place electrically and / or by means of hot gases (radiation principle). A metallurgical and thermal optimization of the melting process is achieved by the nozzle protrusion of at least 10 mm into the melting zone, because this places the hot nozzle opening in the interior of the shaft furnace. Due to the CO post-combustion of the cycle gas by means of oxygen, temperatures of> 2000 ° Celsius are reached at the nozzle mouth zone. The thermal load on the refractory material in the melting zone area is also reduced. The
Schmelzzone, die beim Kreislaufgassystem eingeengt ist, wird durch die oberhalb der Treibdüsenbrenner angeordneten Sauerstofflanzen wieder erweitert. Diese Sauerstofflanzen sind je nach Bedarf zustellbar. Daraus folgt, daß der Ofen je nach Erfordernis insgesamt genauer geregelt werden kann Mit einer integrierten zentrisch, ..wahlweise mit oder ohne Wandkontakt zum wassergekühlten Mündungsstück der Treib¬ düsenbrenner geführten Sauerstofflanze entsteht ein Sauerstoffkernstrahl im eigentlichen Sauerstoff-Kreis- laufgemisch, der sich auf Grund der höheren Geschwindig¬ keiten > der Mündungsgeschwindigkeit des Sauerstoff- Kreislaufgasgemisches im Schüttungsinneren mit dem Koh¬ lenstoff des Füllkokses zu CO2 und CO gemäß der Boudouard-The melting zone, which is restricted in the recycle gas system, is expanded again by the oxygen lances arranged above the motive nozzle burners. These oxygen lances can be delivered as required. It follows that the furnace as a whole can be regulated more precisely as required. With an integrated centric, .. optionally with or without wall contact to the water-cooled nozzle of the propellant nozzle burner, an oxygen core jet is created in the actual oxygen-cycle mixture, which is based on the higher velocities> the outlet velocity of the oxygen-cycle gas mixture in the interior of the bed with the carbon of the filling coke to CO2 and CO according to the Boudouard
Reaktion unter Energiefreisetzung umsetzt. Dadurch kommt es zu einer Temperaturerhöhung in der Füllkokssäule und zu verbesserten ther o-chemischen und metallurgischen Reak¬ tionen. Für das erfindungsgemäße Düsensystem ist weiterhin kennzeichnend, daß das Mündungsstück und das Ejektor-Mit¬ telstück der Treibdüsenbrenner eine separate Wasserkühlung haben. Die Wasserkühlung des MündungsStückes hat die Auf¬ gabe, einen kombinierten chemo-thermischen Verschleiß des MündungsStückes im Hochtemperaturbereich des Ofens durch Schlacke und Eisen zu verhindern, indem sich um das durch den Düsenüberstand ungeschützt in die Schüttung ragende Teil eine schützende Schlackenschicht bildet, weil durch die Wasserkühlung die Wärme abgeführt wird. Die Wasserküh¬ lung des Ejektor-Mittelstückes ist unumgänglich, um ein Aufheizen der Treibdüsenbrenner in diesem Bereich auf Zündtemperatur des Kreislaufgas-Sauerstoffgemisches zu verhindern. Bei Unterschreitung der Kühlwassermenge eines Treibdüsenbrenners wird die Sauerstoffzufuhr aller Treib¬ düsen unterbrochen, und die Kreislaufgasmenge für jedenReaction with release of energy. This leads to an increase in temperature in the filling coke column and to improved thermochemical and metallurgical reactions. It is also characteristic of the nozzle system according to the invention that the mouthpiece and the ejector centerpiece of the propellant nozzle burner have a separate water cooling system. The water cooling of the mouthpiece has the task of a combined chemo-thermal wear of the Prevent the mouthpiece in the high-temperature area of the furnace from slag and iron by forming a protective slag layer around the part that protrudes unprotected into the bulk of the nozzle, because the heat is dissipated by the water cooling. The water cooling of the ejector center piece is essential in order to prevent the propellant nozzle burners from heating up in this area to the ignition temperature of the cycle gas / oxygen mixture. If the amount of cooling water in a propellant nozzle burner is undershot, the oxygen supply to all propellant nozzles is interrupted, and the amount of circulating gas for everyone
Treibdüsenbrenner ist über eine Differenzdruckmessung (Messung des CO-, Cθ2~Gehaltes und der Kreislaufgastempe¬ ratur) in jeder Kreislaufgaszuführungsleitung durch Ver- änderung der Stellung der zugehörigen Klappe regelbar. Derzeitig sind keine technischen Lösungen beim Schmelzen bekannt, die die Steuerung von Klappen über eine durch die Kreislaufgasanalyse und Kreislaufgastemperatur korri¬ gierte Differenzdruckmessung in einer üblichen Meßein- richtung, wie beispielsweise einer Venturidüse, vorsehen und somit die Treibdüsenbrenner bei Unterschreitung einer festgelegten Kühlwassermenge durch --Unterbrechen des Sauer¬ stoffStromes abgestellt werden. Eine derartige Steuerung des Schmelzprozesses bewirkt, daß dieser schlagartig un- terbrochen wird. Da keine Spülluft wie beim klassischen Kupolofenschmelzen als Sicherheitsvariante eingesetzt wer¬ den muß, erfolgt beim Kreislaufgasofen auch kein Nach- sch eizen nach Unterbrechung der SauerstoffVersorgung. Die Abstellzeit ist nur von den Wärmeverlusten/Zeiteinheit, welche das Warmhalten der Schüttung im Ofen bis zum Ein¬ frieren begrenzen, abhängig. Nach einer Abstellphase ist kein zusätzlicher Koks notwendig.The propellant nozzle burner can be regulated by measuring the differential pressure (measuring the CO, CO 2 content and the cycle gas temperature) in each cycle gas supply line by changing the position of the associated flap. There are currently no known technical solutions for melting that provide for the control of flaps by means of a differential pressure measurement corrected by the cycle gas analysis and cycle gas temperature in a conventional measuring device, such as a Venturi nozzle, and thus the propellant nozzle burners when the amount of cooling water falls below a predetermined level. Interruption of the oxygen flow can be stopped. Controlling the melting process in this way causes it to be abruptly interrupted. Since no purge air, as in classic cupola melting, has to be used as a safety variant, there is also no re-heating in the cycle gas furnace after an interruption of the oxygen supply. The shutdown time is only dependent on the heat losses / time unit which limit the keeping of the bed in the furnace until it freezes. No additional coke is required after a shutdown phase.
Das erfindungsgemäße Düsensystem soll an zwei Ausfüh¬ rungsbeispielen näher erläutert werden.The nozzle system according to the invention will be explained in more detail using two exemplary embodiments.
Hierzu zeigen die zugehörigen Zeichnungen in Figur 1: Seitenansicht des DüsensystemsThe associated drawings in Figure 1: Side view of the nozzle system
Figur 2: Seitenansicht des Düsensystems mit einem ver¬ tikal angeordneten rohrförmigen Ejektor-Mit¬ telstück und integrierter Sauerstofflanze im MündungsstückFigure 2: Side view of the nozzle system with a vertically arranged tubular ejector center piece and an integrated oxygen lance in the mouthpiece
Figur 3: Draufsicht des Düsensystems mit einem horizon¬ tal angeordneten rohrförmigen Ejektor-Mittel¬ stück und integrierter Sauerstofflanze im Mün¬ dungsstückFigure 3: Top view of the nozzle system with a horizontally arranged tubular ejector center piece and an integrated oxygen lance in the mouthpiece
Figur 1 zeigt die Seitenansicht des erfindungsgemäßen Dü- sensystems. Es ist dargestellt, daß der Treibdüsenbrenner, der aus einem Mündungsstück 22, aus einem Ejektor-Mittel¬ stück 23 und aus einem Kopfstück 24 mit einer zentrisch geführten Treibdüse 25 besteht, waagerecht mit einem Dü- senüberstand von 90 mm durch den Ofenmantel 17 und das Feuerfestmaterial 20 angeordnet ist und oberhalb dazu im Abstand des 1,5-fachen des lichten Ofenquerschnittes eine wassergekühlte Sauerstofflanze 29 liegt. Das Kopfstück 24 hat eine Revisionsöffnung 26 und ist mit der Kreislaufgas- zuführungsleitung 14, die eine nicht dargestellte regel- bare Klappe hat, verbunden. Zum funktionssicheren Betrei¬ ben des Treibdüsenbrenners haben das Mündungsstück 22 und das Ejektor-Mittelstück 23 eine separate Wasserkühlung 27; 28. In Figur 2' ist die Seitenansicht des erfindungsgemäßen Dü- sensystems mit einem rohrförmigen Ejektor-Mittelstück 23 und der Wasserkühlung 28 sowie einer mit Wandkontakt im Mündungsstück 22 integrierten Sauerstofflanze 12, die in den Ofenschacht 15 bis zur Innenseite des Feuerfestmate¬ rials 20 reicht, dargestellt. Das Mündungsstück 22 hat die Wasserkühlung 27. Parallel zum Mündungsstück 22 im Abstand des 1,5-fachen des lichten Ofenquerschnittes ist eine Sauerstofflanze 29 angeordnet. Charakteristisch für diese Variante des Düsensystems ist, daß die Revisionsöffnung 26 am Ende der KreislaufgasZuführungsleitung 14 angeordnet ist.FIG. 1 shows the side view of the nozzle system according to the invention. It is shown that the propellant nozzle burner, which consists of an orifice piece 22, an ejector center piece 23 and a head piece 24 with a centrally guided propellant nozzle 25, runs horizontally with a nozzle protrusion of 90 mm through the furnace jacket 17 and that Refractory material 20 is arranged and above it is a water-cooled oxygen lance 29 at a distance of 1.5 times the clear furnace cross section. The head piece 24 has an inspection opening 26 and is connected to the cycle gas supply line 14, which has a controllable flap (not shown). For reliable operation of the propellant nozzle burner, the mouthpiece 22 and the ejector center piece 23 have a separate water cooling 27; 28. In FIG. 2 'is the side view of the nozzle system according to the invention with a tubular ejector center piece 23 and the water cooling 28 and an oxygen lance 12 integrated in the mouth piece 22 with wall contact, which extends into the furnace shaft 15 to the inside of the refractory material 20 , shown. The mouthpiece 22 has the water cooling 27. An oxygen lance 29 is arranged parallel to the mouthpiece 22 at a distance of 1.5 times the clear furnace cross section. Characteristic of this A variant of the nozzle system is that the inspection opening 26 is arranged at the end of the cycle gas supply line 14.
Figur 3 zeigt die Draufsicht des Düsensystems mit einem horizontal angeordneten rohrförmigen Ejektor-Mittelstück und integrierter Sauerstofflanze im Mündungsstück. Erkennbar ist, daß der Treibdüsenbrenner zentrisch zur Ofenachse 21 geführt ist. Figure 3 shows the top view of the nozzle system with a horizontally arranged tubular ejector center piece and an integrated oxygen lance in the mouthpiece. It can be seen that the driving nozzle burner is guided centrally to the furnace axis 21.
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU33423/95A AU3342395A (en) | 1994-06-29 | 1995-06-22 | Nozzle system for a device for melting iron metallic materials in a coke-heated cupola furnace |
| MX9606496A MX9606496A (en) | 1995-06-22 | 1995-06-22 | Nozzle system for a device for melting iron metallic materials in a coke-heated cupola furnace. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4422694.2 | 1994-06-29 | ||
| DE19944422694 DE4422694C2 (en) | 1993-01-20 | 1994-06-29 | Nozzle system for a device for melting ferrous metal materials in a coke-heated cupola furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1996000798A1 true WO1996000798A1 (en) | 1996-01-11 |
Family
ID=6521765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1995/002430 Ceased WO1996000798A1 (en) | 1994-06-29 | 1995-06-22 | Nozzle system for a device for melting iron metallic materials in a coke-heated cupola furnace |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU3342395A (en) |
| WO (1) | WO1996000798A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0762068A1 (en) * | 1995-08-28 | 1997-03-12 | Linde Aktiengesellschaft | Process for operating an oxygen-consuming metallurgical shaft furnace and shaft furnace for performing said process |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1014745B (en) * | 1952-03-18 | 1957-08-29 | Basf Ag | Procedure for operating shaft ovens |
| US3193271A (en) * | 1961-01-20 | 1965-07-06 | Yawata Iron & Steel Co | Blast controlling device for blast furnaces |
| GB1180410A (en) * | 1966-10-20 | 1970-02-04 | Adriano Carli | Process and Apparatus for the Production of Pig Iron |
| US3583644A (en) * | 1969-05-28 | 1971-06-08 | Bethlehem Steel Corp | Blast furnace fluid fuel injection apparatus |
| DE8527298U1 (en) * | 1985-09-25 | 1985-11-14 | Dr. Küttner GmbH & Co KG, 4300 Essen | Blow mold for shaft furnaces |
| WO1989002051A1 (en) * | 1987-09-02 | 1989-03-09 | Aga Aktiebolag | A method to generate an oxidizing flame, a burner and a use for a burner |
| SU1471035A1 (en) * | 1986-06-23 | 1989-04-07 | Специальное конструкторское бюро тяжелых цветных металлов при Институте "Гинцветмет" | Arrangement for producing and supplying pressurized reducing gases ,particularly, into a shaft melting furnace for nonferrous metals |
| FR2681418A1 (en) * | 1991-09-17 | 1993-03-19 | Air Liquide | Method of injecting oxidant gas and additives into a metal-smelting furnace, and smelting furnace |
-
1995
- 1995-06-22 WO PCT/EP1995/002430 patent/WO1996000798A1/en not_active Ceased
- 1995-06-22 AU AU33423/95A patent/AU3342395A/en not_active Abandoned
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1014745B (en) * | 1952-03-18 | 1957-08-29 | Basf Ag | Procedure for operating shaft ovens |
| US3193271A (en) * | 1961-01-20 | 1965-07-06 | Yawata Iron & Steel Co | Blast controlling device for blast furnaces |
| GB1180410A (en) * | 1966-10-20 | 1970-02-04 | Adriano Carli | Process and Apparatus for the Production of Pig Iron |
| US3583644A (en) * | 1969-05-28 | 1971-06-08 | Bethlehem Steel Corp | Blast furnace fluid fuel injection apparatus |
| DE8527298U1 (en) * | 1985-09-25 | 1985-11-14 | Dr. Küttner GmbH & Co KG, 4300 Essen | Blow mold for shaft furnaces |
| SU1471035A1 (en) * | 1986-06-23 | 1989-04-07 | Специальное конструкторское бюро тяжелых цветных металлов при Институте "Гинцветмет" | Arrangement for producing and supplying pressurized reducing gases ,particularly, into a shaft melting furnace for nonferrous metals |
| WO1989002051A1 (en) * | 1987-09-02 | 1989-03-09 | Aga Aktiebolag | A method to generate an oxidizing flame, a burner and a use for a burner |
| FR2681418A1 (en) * | 1991-09-17 | 1993-03-19 | Air Liquide | Method of injecting oxidant gas and additives into a metal-smelting furnace, and smelting furnace |
Non-Patent Citations (2)
| Title |
|---|
| "advantages of long campaign cupolas", FOUNDRY TRADE JOURNAL, vol. 167, no. 3467, GB, pages 36 - 37 * |
| DATABASE WPI Week 90, 28 February 1990 Derwent World Patents Index; AN 90-020887-03, "device for reducing gas prodn. and supply to shaft furnace" * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0762068A1 (en) * | 1995-08-28 | 1997-03-12 | Linde Aktiengesellschaft | Process for operating an oxygen-consuming metallurgical shaft furnace and shaft furnace for performing said process |
Also Published As
| Publication number | Publication date |
|---|---|
| AU3342395A (en) | 1996-01-25 |
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