EP0892236A1 - Cooled ladle cover - Google Patents
Cooled ladle cover Download PDFInfo
- Publication number
- EP0892236A1 EP0892236A1 EP98112468A EP98112468A EP0892236A1 EP 0892236 A1 EP0892236 A1 EP 0892236A1 EP 98112468 A EP98112468 A EP 98112468A EP 98112468 A EP98112468 A EP 98112468A EP 0892236 A1 EP0892236 A1 EP 0892236A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hood
- tube
- pan
- cooled
- water
- 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
Links
- 239000007789 gas Substances 0.000 claims abstract description 33
- 238000001816 cooling Methods 0.000 claims abstract description 21
- 238000000605 extraction Methods 0.000 claims description 7
- 239000000779 smoke Substances 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- 239000002912 waste gas Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 239000003546 flue gas Substances 0.000 description 10
- 239000003570 air Substances 0.000 description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 210000000078 claw Anatomy 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000005275 alloying Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009847 ladle furnace Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
-
- 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
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/18—Door frames; Doors, lids, removable covers
- F27D1/1808—Removable covers
- F27D1/1816—Removable covers specially adapted for arc furnaces
-
- 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
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
- F27D17/003—Extraction of waste gases, collection of fumes and hoods used therefor of waste gases emanating from an electric arc furnace
Definitions
- the invention relates to a water-cooled, multi-part Hood for metallurgical vessels, in particular ladles, with in pipe-to-pipe and / or pipe-gap-pipe welding arranged cooling tubes, with one in the lid the hood arranged opening for the use of a ff centerpiece for carrying electrodes and Openings for the discharge of smoke gases.
- DE 34 27 086 C1 is a metallurgical vessel with one leaving a peripheral air gap heat shield arranged above known, the has at least one opening through which each of outside a probe, lance or electrode into the interior of the vessel and with one around the heat shield placed, downwardly open suction hood, the the vessel extends beyond the peripheral air gap surrounds and between the heat shield and the Extraction hood formed air space to a suction device connected.
- DE 42 24 845 A1 describes a device for Sealing a circumferential gap between one Steel ladle and the water-cooled ladle hood of a pan oven heated by electrodes. This is to prevent that the sudden addition of aggregates and alloying agents strong as a result of chemical reaction The amount of flue gas can escape freely.
- a disadvantage of the pan hoods mentioned is that insufficient sealing on the upper lid area of the Carrying lances or electrodes and the insufficient extraction of the hot smoke gases in the upper part the pan hood.
- the invention is therefore based on the object to design the generic embodiment in that that targeted extraction of the flue gases at the same time at various points on the water-cooled pan hood is feasible.
- the pan hood consists of one outer and an inner tubular cylinder, the lower Hood part, which is arranged by vertically arranged cooling pipes, which both outside and inside over the edge of the Pan down, is divided.
- the flue gases are through the lower part of the water-cooled hood and targeted in the upper part at three points in the area of the electrodes targeted suction.
- the gas flows are outside in the Area of transition to the stationary exhaust pipe merged.
- the percentage of deducted Flue gas quantities over this lower, inner hood part is about 80% of the total and is in one Temperature range between 1200 ° C and 1400 ° C.
- Another extraction area is in the upper part of the Hood, the so-called secondary hood.
- This part of the hood is designed so that as few smoke gases as possible can penetrate this area because here too vertical cooling tube wall circular downwards cantilevered.
- the Incoming smoke gases targeted in the area of Sucked electrodes at three places.
- the openings in the cylindrical part of the upper hood part therefore make sure that an even Suction takes place.
- the gas flows are also here outside in the area of the transition to the stationary Exhaust pipe merged.
- the proportion of the secondary hood or The amount of gas withdrawn from the upper hood part is approximately 20% of the total and lies in a temperature range between 600 ° and 1200 ° C.
- the entire hood is water-cooled and as pipe-to-pipe and / or partially as pipe-gap-pipe welding executed, the water-cooled work door is opened and closed pneumatically. Through this The temperature of the work door is increased by hand lances determined and samples of the melt taken. The alloy funnel also becomes pneumatic closed or opened. In the open state prevents air curtain in the downpipe larger quantities of flue gas can escape.
- the addition funnel for aggregates and alloys is installed as a water-cooled nozzle. This water-cooled The nozzle becomes dustproof in the pan hood built-in.
- the ff centerpiece for the electrode bushings is from an interchangeable water-cooled ring of three tubes placed one above the other. It will be one Gap width equal to or less than 25 mm between the Electrodes and the ramming mass of the heart, around the flue gas passage or false air intake to keep within limits.
- the cooling water is supplied via pipes flexible expansion joints and their distributors.
- cooling circuits are provided for the In the pan hood according to the invention. There are also two cooling circuits for the end nozzle of the alloy funnel and for the water-cooled ring of the heart.
- the inner tubular cylinder of the pan hood protrudes Working position in the ladle, the outer one Pipe cylinder is above the pan rim outside of the Pouring ladle positioned.
- the inner tube cylinder can have a smaller capacity also placed directly on the edge of the pan become.
- the inner tube cylinder of the hood When using ladles with a low Capacity and a pan diameter that smaller than the inner tube cylinder of the hood the inner tube cylinder of the hood is over lowered the pan rim. In this case it depends Hood free in the lid lifting device or it supports attached to the outside of the pan Claws or reinforcing collar below the pan hood from.
- the invention is based on two schematic Drawings approached explained.
- Fig. 1 shows a side view of the water-cooled Pan hood in working position over one with one Melt (13) filled steel ladle (12), the Electrodes (9) through the ff material (11) of the water-cooled Centerpiece (18) in the so-called heating position are lowered.
- the water-cooled pan hood (1, 2, 3) consists of welded in tube-to-tube or tube-gap tube Cooling tubes (8) which are vertically one above the other or are arranged horizontally next to each other.
- the lower, outer hood part (1) and the lower, inner hood part (2) are immediately above the upper one Pan edge (22) positioned and by support arms of the Lid lifting device (19) on the cooling walls (8) attached.
- In the inner hood part (2) are the Cooling pipes (8) of the upper hood part (3) inserted.
- the inner tube cylinder (8.2) of the inner hood (2) is longer than the outer tubular cylinder (8.1) of the outer Hood (1) trained.
- the hot smoke gases are extracted through suction openings (4) sucked into a first gas guide tube (6) and from there a main dedusting (20) fed.
- the less hot flue gases are in through suction openings (5)
- a second gas guide pipe (7) is sucked in and from there an auxiliary dedusting (21) fed.
- Fresh air can through a suction opening (14) above the pan rim (23) be sucked in.
- the ff material (11) of the heart (18) is in an opening (10) between the water-cooled Rings of the centerpiece (18) attached.
- a pivotable, cooled work door (16) is on Transition from horizontal and vertical cooling tubes (8) in the upper part of the inner tube cylinder (8.2) arranged.
- the pan hood (1, 2) can be in Working position except for on the ladle (12) attached reinforcing collar (23) or claws be lowered.
- Fig. 2 shows a top view of the water-cooled Pan hood (1, 2) with central opening (10) and water-cooled ring (18), which together with the upper cooling tube wall (8) as a support for the ff material (11) through which the electrodes (9) slide.
- the lower suction openings (4) are with the gas pipe (6) connected, the suction openings (5) of the the upper hood part (3) are attached to the gas pipe (7) connected, the gas guide tube (6) to a Main dedusting (20) and the gas pipe (7) a secondary dedusting (21) connects.
- the pan hood (1, 2) is on three support arms, the cover lifting device (19), detachable attached.
Abstract
Description
Die Erfindung betrifft eine wassergekühlte, mehrteilige Haube für metallurgische Gefäße, insbesondere Gießpfannen, mit in Rohr-an-Rohr- und/oder Rohr-Spalt-Rohr-Schweißung angeordneten Kühlrohren, mit einer im Deckel der Haube angeordneten Öffnung zum Einsatz eines ff-Herzstückes zur Durchführung von Elektroden und Öffnungen zur Abführung von Rauchgasen.The invention relates to a water-cooled, multi-part Hood for metallurgical vessels, in particular ladles, with in pipe-to-pipe and / or pipe-gap-pipe welding arranged cooling tubes, with one in the lid the hood arranged opening for the use of a ff centerpiece for carrying electrodes and Openings for the discharge of smoke gases.
Bei dem Betrieb von Pfannenöfen zur metallurgischen Nachbehandlung von Stahlschmelzen aus Konvertern, Lichtbogenöfen oder dergleichen ist es üblich, das Austreten der heißen und staubbeladenen Abgase über den Pfannenrand in die Halle dadurch zu verhindern, daß die Absaugung der Abgase durch einen an der Pfannenhaube angebrachten Rohrleitungsstutzen erfolgt. Zusätzlich zur Absaugung über die Öffnungen an der Pfannenhaube werden weitere Absaugstellen an der den Pfannenrand der Stahlgießpfanne überlappenden Pfannenhaube angeordnet bzw. die Pfannenhaube wird auf den Pfannenrand oder eine zusätzliche Einrichtung zur Abstützung aufgelegt.When operating ladle furnaces for metallurgical Post-treatment of molten steel from converters, Arc furnaces or the like, it is common that Escape of the hot and dust-laden exhaust gases through the Pan edge in the hall to prevent the Extraction of the exhaust gases by one on the pan hood attached pipe socket. In addition for suction through the openings on the pan hood there are further suction points on the edge of the pan Steel ladle overlapping pan hood arranged or the pan hood is on the pan edge or an additional device for support.
Aus der DE 31 47 337 C2 ist eine wassergekühlte Haube für metallurgische Gefäße, insbesondere Gießpfannen, mit Kragen und Deckelteil bekannt, die aus dicht an dicht oder mit geringem Spalt angeordneten Kühlrohren, die durch aufgesetzte Kappen zu einer meanderförmigen Kühlwasserführung vereinigt sind, besteht, wobei der Kragen im wesentlichen aus vertikal verlaufenden Kühlrohren aufgebaut ist, das Deckelteil einerseits in Umfangsrichtung verlaufende Kühlrohre und andererseits ein selbsttragendes Herzstück aufweist, wobei das Herzstück drei um 120° versetzte, runde Elektrodendurchführung besitzt und die Elektrodendurchführungen von Kühlkränzen umgeben sind, die aus einer Mehrzahl von übereinander in Umfangsrichtung der Elektrodendurchführungen verlaufenden Kühlrohren aufgebaut sind, die Kühlkränze im Zentrum des Deckelteils zusammengeführt und an die Kühlkränze außenseitig obere Tragflansche angeschweißt sind, die mit Zwickeln zwischen die Elektrodendurchführungen fassen.From DE 31 47 337 C2 is a water-cooled hood for metallurgical vessels, especially ladles, known with collar and lid part, which from close to each other cooling tubes arranged tightly or with a small gap, the meandering through the attached caps Cooling water supply are united, the Collar essentially made of vertical cooling tubes is built, the cover part in one hand Circumferential cooling tubes and on the other hand has a self-supporting centerpiece, the centerpiece three round electrode bushings offset by 120 ° owns and the electrode bushings from Cooling rings are surrounded, which consist of a plurality of one above the other in the circumferential direction of the electrode bushings extending cooling tubes are constructed, the Cooling rings brought together in the center of the cover part and on the outside of the cooling rings upper supporting flanges are welded with gussets between the Grasp electrode bushings.
Aus der DE 34 27 086 C1 ist ein metallurgisches Gefäß mit einem unter Belassung eines peripheren Luftspaltes darüber angeordneten Hitzeschild bekannt, der mindestens eine Öffnung aufweist, durch die jeweils von außen eine Sonde, Lanze oder Elektrode in den Innenraum des Gefäßes geführt wird und mit einer um den Hitzeschild gelegten, nach unten offenen Absaugehaube, die über den peripheren Luftspalt hinrausreichend das Gefäß umgibt und wobei der zwischen dem Hitzeschild und der Absaughaube gebildete Luftraum an eine Absaugvorrichtung angeschlossen ist. Um ein metallurgisches Gefäß der oben erwähnten Art zu schaffen, das eine Absaugung der Prozeßgase und -stäube und gleichzeitig eine wirksame Abschirmung der Umgebungsluft von der Metallschmelze gewährleistet, wurde innerhalb der Absaughaube eine den peripheren Luftspalt außen vollständig überragende Trennwand angeordnet, die mit der Wandung der Absaughaube eine Ansaugdüse bildet, die das Gefäß umgibt.DE 34 27 086 C1 is a metallurgical vessel with one leaving a peripheral air gap heat shield arranged above known, the has at least one opening through which each of outside a probe, lance or electrode into the interior of the vessel and with one around the heat shield placed, downwardly open suction hood, the the vessel extends beyond the peripheral air gap surrounds and between the heat shield and the Extraction hood formed air space to a suction device connected. A metallurgical vessel of the type mentioned above to create a suction the process gases and dusts and at the same time an effective one Shielding the ambient air from the molten metal was guaranteed within the exhaust hood a completely overhanging the peripheral air gap on the outside Partition arranged with the wall of the Suction hood forms a suction nozzle that forms the vessel surrounds.
Aus der DE 42 24 845 A1 ist eine Vorrichtung zur Abdichtung eines umlaufenden Spaltes zwischen einer Stahlgießpfanne und der wassergekühlten Pfannenhaube eines durch Elektroden beheizten Pfannenofens bekannt. Damit soll verhindert werden, daß die sich bei plötzlicher Zugabe von Zuschlagstoffen und Legierungsmitteln infolge chemischer Reaktion bildende starke Rauchgasmenge ungehindert ins Freie gelangen kann. DE 42 24 845 A1 describes a device for Sealing a circumferential gap between one Steel ladle and the water-cooled ladle hood of a pan oven heated by electrodes. This is to prevent that the sudden addition of aggregates and alloying agents strong as a result of chemical reaction The amount of flue gas can escape freely.
Am unteren Teil der Pfannenhaube wird ein gasführendes Rohr angebracht. Durch eine Vielzahl von innerhalb eines Winkelbereichs von 45° nach oben bzw. nach unten angeordnete Bohrungen an diesem Rohr tritt mit Überdruck Gas aus, das einen Gasschleier zur Abdichtung des Spaltes zwischen Stahlgießpfanne und wassergekühlter Pfannenhaube bildet.At the lower part of the pan hood there is a gas pipe Tube attached. Through a variety of within an angular range of 45 ° upwards or downwards arranged bores on this pipe occurs with overpressure Gas from which a gas curtain to seal the Gap between steel ladle and water-cooled Pan hood forms.
Nachteilig bei dem genannten Pfannenhauben ist die ungenügende Abdichtung am oberen Deckelbereich der Durchführung von Lanzen bzw. Elektroden und die mangelnde Absaugung der heißen Rauchgase im oberen Teil der Pfannenhaube.A disadvantage of the pan hoods mentioned is that insufficient sealing on the upper lid area of the Carrying lances or electrodes and the insufficient extraction of the hot smoke gases in the upper part the pan hood.
Der Erfindung liegt daher die Aufgabe zugrunde, die gattungsgemäße Ausführungsform dahingehend auszubilden, daß eine gezielte Absaugung der Rauchgase gleichzeitig an verschiedenen Stellen der wassergekühlten Pfannenhaube durchführbar ist.The invention is therefore based on the object to design the generic embodiment in that that targeted extraction of the flue gases at the same time at various points on the water-cooled pan hood is feasible.
Die Lösung der Aufgabe erfolgt entsprechend dem
kennzeichnenden Merkmal von Anspruch 1.
Die Unteransprüche stellen eine vorteilhafte
Ausgestaltung der Erfindung dar.The task is solved accordingly
characteristic feature of
Bei der erfindungsgemäßen, wassergekühlten Pfannenhaube werden gegenüber den bekannten Pfannenhauben die Rauchgase jeweils mindestens an drei Stellen und in zwei Ebenen abgesaugt. Die Pfannenhaube besteht aus einem äußeren und einem inneren Rohrzylinder, dem unteren Haubenteil, der durch senkrecht angeordnete Kühlrohre, die sowohl außen als auch innen über den Rand der Pfanne nach unten ragen, geteilt wird.In the case of the water-cooled pan hood according to the invention compared to the well-known pan hoods, the flue gases at least in three places and in two Levels sucked off. The pan hood consists of one outer and an inner tubular cylinder, the lower Hood part, which is arranged by vertically arranged cooling pipes, which both outside and inside over the edge of the Pan down, is divided.
In den unteren Bereich der Haube, der direkt über die in der Pfanne befindlichen Schmelze abgesenkt wird, werden die Rauchgase durch den unteren Teil der wassergekühlten Haube erfaßt und im oberen Teil gezielt an drei Stellen jeweils im Bereich der Elektroden gezielt abgesaugt. Die Gasströme werden außerhalb im Bereich des Übergangs zum stationären Abgasrohr zusammengeführt. Der Anteil der abgezogenen Rauchgasmengen über diesen unteren, inneren Haubenteil beträgt etwa 80 % der Gesamtmenge und liegt in einem Temperaturbereich zwischen 1200 °C und 1400 °C.In the lower area of the hood, which is directly over the the melt in the pan is lowered, the flue gases are through the lower part of the water-cooled hood and targeted in the upper part at three points in the area of the electrodes targeted suction. The gas flows are outside in the Area of transition to the stationary exhaust pipe merged. The percentage of deducted Flue gas quantities over this lower, inner hood part is about 80% of the total and is in one Temperature range between 1200 ° C and 1400 ° C.
Ein weiterer Absaugbereich liegt im oberen Teil der Haube, der sogenannten Sekundärhaube. Dieser Haubenteil ist so ausgeführt, daß möglichst wenig Rauchgase in diesen Bereich eindringen können, da auch hier die senkrechte Kühlrohrwand kreisförmig nach unten auskragt. Wie im unteren Haubenteil auch, werden die dort ankommenden Rauchgase gezielt im Bereich der Elektroden an drei Stellen abgesaugt.Another extraction area is in the upper part of the Hood, the so-called secondary hood. This part of the hood is designed so that as few smoke gases as possible can penetrate this area because here too vertical cooling tube wall circular downwards cantilevered. As in the lower part of the hood, the Incoming smoke gases targeted in the area of Sucked electrodes at three places.
Diese drei Öffnungen in der Sekundärhaube werden in ihrer Dimensionierung so ausgelegt, daß an allen drei Absaugstellen annähernd die gleiche Absaugmenge abgesaugt wird. Durch den Einbau von Blenden kann zusätzlich in einem begrenzten Volumenbereich die abzusaugende Rauchgasmenge den tatsächlichen Betriebsbedingungen der Ofenanlage angepaßt werden.These three openings in the secondary hood are in dimensioned so that all three Suction points have approximately the same amount of suction extracted becomes. By installing panels, additional in a limited volume range, the one to be extracted Amount of flue gas the actual operating conditions be adapted to the furnace system.
Die Öffnungen im zylindrischen Teil des oberen Haubenteiles stellen daher sicher, daß eine gleichmäßige Absaugung erfolgt. Die Gasströme werden auch hier außerhalb im Bereich des Überganges zum stationären Abgasrohr zusammengeführt. Um ein Ausschwallen von Rauchgasen durch die drei Ringspalte zwischen Elektroden und dem ff-Material des Herzstückes zu vermeiden und um den Unterdruck im unteren Absaugbereich so klein wie nötig zu halten, werden die Unterdrucke in beiden Absaugebenen getrennt eingestellt. Der Anteil der über die Sekundärhaube bzw. oberen Haubenteil abgezogenen Gasmenge beträgt etwa 20 % der Gesamtmenge und liegt in einem Temperaturbereich zwischen 600° und 1200 °C.The openings in the cylindrical part of the upper hood part therefore make sure that an even Suction takes place. The gas flows are also here outside in the area of the transition to the stationary Exhaust pipe merged. In order to float out of Flue gases through the three ring gaps between Electrodes and the ff material of the heart avoid and around the vacuum in the lower suction area to keep them as small as necessary Negative pressures set separately in both suction levels. The proportion of the secondary hood or The amount of gas withdrawn from the upper hood part is approximately 20% of the total and lies in a temperature range between 600 ° and 1200 ° C.
Die gesamte Haube ist wassergekühlt und als Rohr-an-Rohr- und/oder teilweise als Rohr-Spalt-Rohr-Schweißung ausgeführt, wobei die wassergekühlte Arbeitstür pneumatisch geöffnet und verschlossen wird. Durch diese Arbeitstür wird mittels Handlanzen die Temperatur ermittelt und Proben der Schmelze genommen. Ebenso wird der Legierungstrichter pneumatisch verschlossen bzw. geöffnet. Im geöffneten Zustand verhindert eine Luftabschleierung im Fallrohr, das größere Mengen Rauchgas entweichen können.The entire hood is water-cooled and as pipe-to-pipe and / or partially as pipe-gap-pipe welding executed, the water-cooled work door is opened and closed pneumatically. Through this The temperature of the work door is increased by hand lances determined and samples of the melt taken. The alloy funnel also becomes pneumatic closed or opened. In the open state prevents air curtain in the downpipe larger quantities of flue gas can escape.
Der Zugabetrichter für Zuschläge und Legierungen wird als wassergekühlter Stutzen installiert. Dieser wassergekühlte Stutzen wird staubdicht in die Pfannenhaube eingebaut.The addition funnel for aggregates and alloys is installed as a water-cooled nozzle. This water-cooled The nozzle becomes dustproof in the pan hood built-in.
Das ff-Herzstück für die Elektrodendurchführungen wird von einem auswechselbaren wassergekühlten Ring aus drei übereinanderliegenden Rohren getragen. Es wird eine Spaltbreite gleich oder kleiner als 25 mm zwischen den Elektroden und der Stampfmasse des Herzstückes angestrebt, um den Rauchgasdurchtritt bzw. Falschluftansaugung in Grenzen zu halten.The ff centerpiece for the electrode bushings is from an interchangeable water-cooled ring of three tubes placed one above the other. It will be one Gap width equal to or less than 25 mm between the Electrodes and the ramming mass of the heart, around the flue gas passage or false air intake to keep within limits.
Die Kühlwasserversorgung erfolgt über Rohrleitungen mit flexiblen Kompensatoren und deren Verteiler. Für die erfindungsgemäße Pfannenhaube sind Kühlkreisläufe vorgesehen. Hinzu kommen ferner noch zwei Kühlkreisläufe für den Endstutzen des Legierungstrichters sowie für den wassergekühlten Ring des Herzstücks. The cooling water is supplied via pipes flexible expansion joints and their distributors. For the In the pan hood according to the invention, cooling circuits are provided. There are also two cooling circuits for the end nozzle of the alloy funnel and for the water-cooled ring of the heart.
Um einen verbesserten Gleichlauf der Haube bei den Hubbewegungen zu erreichen, werden drei Deckelhubzylinder in der Deckelhubvorrichtung installiert. Der Gleichlauf der Pfannenhaube wird über drei Stromregelventile erreicht.To improve the synchronization of the hood during the lifting movements three lid lift cylinders installed in the lid lifting device. The synchronization the pan hood is via three flow control valves reached.
An jedem Zylinder wird die obere Endlage der Pfannenhaube überwacht. Das Hydraulikventil für die Hubbewegungen aller Zylinder wird erst abgeschaltet, wenn alle Zylinder ihre Endlage erreicht haben. Das Absenken der Haube erfolgt dann immer von der gleichen Ausgangsstellung. Die mechanische Anbindung dieser Hydraulikzylinder erfolgt über eine stationäre Ofenbühne.The upper end position of the Pan hood monitored. The hydraulic valve for the Stroke movements of all cylinders are only switched off when all cylinders have reached their end position. The hood is then always lowered from the same starting position. The mechanical connection this hydraulic cylinder takes place via a stationary one Furnace stage.
Der innere Rohrzylinder der Pfannenhaube ragt in Arbeitsposition in die Gießpfanne hinein, der äußere Rohrzylinder wird über dem Pfannenrand außerhalb der Gießpfanne positioniert.The inner tubular cylinder of the pan hood protrudes Working position in the ladle, the outer one Pipe cylinder is above the pan rim outside of the Pouring ladle positioned.
Bei Einsatz von kleineren Gießpfannen mit einem geringeren Fassungsvermögen kann der innere Rohrzylinder auch direkt auf dem Pfannenrand aufgesetzt werden.When using smaller ladles with a The inner tube cylinder can have a smaller capacity also placed directly on the edge of the pan become.
Bei Verwendung von Gießpfannen mit einem geringen Fassungsvermögen und einem Pfannendurchmesser, der kleiner als der innere Rohrzylinder der Haube ausgeführt ist, wird der innere Rohrzylinder der Haube über den Pfannenrand abgesenkt. Bei diesem Fall hängt die Haube frei in der Deckelhubvorrichtung oder sie stützt sich auf an der äußeren Seite der Pfanne befestigten Pratzen oder Verstärkungskragen unterhalb der Pfannenoberhaube ab.When using ladles with a low Capacity and a pan diameter that smaller than the inner tube cylinder of the hood the inner tube cylinder of the hood is over lowered the pan rim. In this case it depends Hood free in the lid lifting device or it supports attached to the outside of the pan Claws or reinforcing collar below the pan hood from.
Die Erfindung wird anhand von zwei schematischen Zeichnungen nähert erläutert. The invention is based on two schematic Drawings approached explained.
Es zeigen:
- Fig. 1
- eine Seitenansicht der wassergekühlten Pfannenhaube,
- Fig. 2
- eine Draufsicht auf die wassergekühlten Pfannenhauben.
- Fig. 1
- a side view of the water-cooled pan hood,
- Fig. 2
- a top view of the water-cooled pan hoods.
Fig. 1 zeigt eine Seitenansicht der wassergekühlten Pfannenhaube in Arbeitsposition über einer mit einer Schmelze (13) gefüllten Stahlgießpfanne (12), wobei die Elektroden (9) durch das ff-Material (11) des wassergekühlten Herzstückes (18) in die sogenannte Aufheizposition abgesenkt sind.Fig. 1 shows a side view of the water-cooled Pan hood in working position over one with one Melt (13) filled steel ladle (12), the Electrodes (9) through the ff material (11) of the water-cooled Centerpiece (18) in the so-called heating position are lowered.
Die wassergekühlte Pfannenhaube (1, 2, 3) besteht aus in Rohr-an-Rohr- oder Rohr-Spalt-Rohr geschweißten Kühlrohren (8), die vertikal übereinander oder horizontal nebeneinander angeordnet sind. Der untere, äußere Haubenteil (1) und der untere, innere Haubenteil (2) sind unmittelbar über dem oberen Pfannenrand (22) positioniert und durch Tragarme der Deckelhubvorrichtung (19) an den Kühlwänden (8) befestigt. In den inneren Haubenteil (2) sind die Kühlrohre (8) des oberen Haubenteiles (3) eingelassen. Der innere Rohrzylinder (8.2) der inneren Haube (2) ist länger als der äußere Rohrzylinder (8.1) der äußeren Haube (1) ausgebildet.The water-cooled pan hood (1, 2, 3) consists of welded in tube-to-tube or tube-gap tube Cooling tubes (8) which are vertically one above the other or are arranged horizontally next to each other. The lower, outer hood part (1) and the lower, inner hood part (2) are immediately above the upper one Pan edge (22) positioned and by support arms of the Lid lifting device (19) on the cooling walls (8) attached. In the inner hood part (2) are the Cooling pipes (8) of the upper hood part (3) inserted. The inner tube cylinder (8.2) of the inner hood (2) is longer than the outer tubular cylinder (8.1) of the outer Hood (1) trained.
Die heißen Rauchgase werden durch Absaugöffnungen (4) in ein erstes Gasführungsrohr (6) gesaugt und von dort einer Hauptentstaubung (20) zugeführt. Die weniger heißen Rauchgase werden durch Absaugöffnungen (5) in ein zweites Gasführungsrohr (7) gesaugt und von dort einer Nebenentstaubung (21) zugeleitet. Frischluft kann durch eine Ansaugöffnung (14) über dem Pfannenrand (23) angesaugt werden. Das ff-Material (11) des Herzstückes (18) wird in einer Öffnung (10) zwischen den wassergekühlten Ringen des Herzstückes (18) angebracht. Eine schwenkbare, gekühlte Arbeitstür (16) ist am Übergang von horizontalen und vertikalen Kühlrohren (8) im oberen Teil des inneren Rohrzylinders (8.2) angeordnet. Die Pfannenhaube (1, 2) kann in Arbeitsposition bis auf den an der Gießpfanne (12) angebrachten Verstärkungskragen (23) oder Pratzen abgesenkt werden.The hot smoke gases are extracted through suction openings (4) sucked into a first gas guide tube (6) and from there a main dedusting (20) fed. The less hot flue gases are in through suction openings (5) a second gas guide pipe (7) is sucked in and from there an auxiliary dedusting (21) fed. Fresh air can through a suction opening (14) above the pan rim (23) be sucked in. The ff material (11) of the heart (18) is in an opening (10) between the water-cooled Rings of the centerpiece (18) attached. A pivotable, cooled work door (16) is on Transition from horizontal and vertical cooling tubes (8) in the upper part of the inner tube cylinder (8.2) arranged. The pan hood (1, 2) can be in Working position except for on the ladle (12) attached reinforcing collar (23) or claws be lowered.
Fig. 2 zeigt eine Draufsicht auf die wassergekühlte Pfannenhaube (1, 2) mit mittig angeordneter Öffnung (10) und wassergekühltem Ring (18), der zusammen mit der oberen Kühlrohrwand (8) als Auflage für das ff-Material (11) dient, durch das die Elektroden (9) gleiten.Fig. 2 shows a top view of the water-cooled Pan hood (1, 2) with central opening (10) and water-cooled ring (18), which together with the upper cooling tube wall (8) as a support for the ff material (11) through which the electrodes (9) slide.
Die unteren Absaugöffnungen (4) sind mit dem Gasführungsrohr (6) verbunden, die Absaugöffnungen (5) des oberen Haubenteiles (3) sind an das Gasführungsrohr (7) angeschlossen, wobei das Gasführungsrohr (6) an eine Hauptentstaubung (20) und das Gasführungsrohr (7) an eine Nebenentstaubung (21) anschließt.The lower suction openings (4) are with the gas pipe (6) connected, the suction openings (5) of the the upper hood part (3) are attached to the gas pipe (7) connected, the gas guide tube (6) to a Main dedusting (20) and the gas pipe (7) a secondary dedusting (21) connects.
Eine nicht dargestellte Lanze für Temperaturmessung bzw. Probenahme kann durch die geöffnete Arbeitstür (16), Zuschlagstoffe und Legierungsmittel werden über einen wassergekühlten Trichter (17) in die Gießpfanne mit Schmelze eingeführt. Die Pfannenhaube (1, 2) ist an drei Tragarmen, der Deckelhubvorrichtung (19), lösbar befestigt. A lance, not shown, for temperature measurement or sampling through the open work door (16), aggregates and alloying agents are about a water-cooled funnel (17) into the ladle introduced with melt. The pan hood (1, 2) is on three support arms, the cover lifting device (19), detachable attached.
- 11
- unterer, äußerer Haubenteillower, outer hood part
- 22nd
- unterer, innerer Haubenteillower, inner hood part
- 33rd
- oberer Haubenteilupper part of the hood
- 44th
- Absaugöffnung von 1 und 2 (Hauptentstaubung)Extraction opening of 1 and 2 (main dedusting)
- 55
- Absaugöffnung von 3Suction opening of 3
- 66
- Gasführungsrohr von 4 (Hauptentstaubung)Gas pipe of 4 (main dedusting)
- 77
- Gasführungsrohr von 5Gas pipe from 5
- 88th
- horizontale oder vertikale Kühlrohrwandhorizontal or vertical cooling pipe wall
- 8.18.1
- äußerer Rohrzylinderouter tube cylinder
- 8.28.2
- innerer Rohrzylinder/Sekundärhaubeinner tube cylinder / secondary hood
- 99
- ElektrodenElectrodes
- 1010th
-
Öffnung im oberen Haubenteil 3Opening in the upper part of the
hood 3 - 1111
- ff-Materialff material
- 11
- 2 Gießpfanne2 ladle
- 1313
- Schmelzemelt
- 1414
- AnsaugöffnungSuction opening
- 1515
- Schlackeslag
- 1616
- ArbeitstürWork door
- 1717th
- Zuschlagstoff-Zugabe-TrichterAggregate addition funnel
- 1818th
- Wassergekühltes Herzstück/RingeWater-cooled centerpiece / rings
- 1919th
- DeckelhubvorrichtungLid lifting device
- 2020th
- HauptentstaubungMain dedusting
- 2121
- NebenentstaubungSecondary dedusting
- 2222
- PfannenrandPan rim
- 2323
- Verstärkungskragen/PratzenReinforcing collar / claws
Claims (6)
dadurch gekennzeichnet,
characterized,
dadurch gekennzeichnet,
daß das Gasführungsrohr (6) an eine Hauptentstaubungsanlage (21) und das Gasführungsrohr (7) an eine Nebenentstaubungsanlage (22) anschließbar ist.Device according to claim 1,
characterized,
that the gas guide pipe (6) can be connected to a main dedusting system (21) and the gas guide pipe (7) to a secondary dedusting system (22).
dadurch gekennzeichnet,
daß der innere Rohrzylinder (8.2) der unteren, inneren Haube (2) länger als der äußere Rohrzylinder (8.1) der unteren, äußeren Haube (1) ausgebildet ist. Device according to claim 1,
characterized,
that the inner tube cylinder (8.2) of the lower, inner hood (2) is longer than the outer tube cylinder (8.1) of the lower, outer hood (1).
dadurch gekennzeichnet,
daß die Pfannenhaube (1, 2, 3) an drei Punkten hängend in der Deckelhubvorrichtung (19) befestigt ist.Device according to claims 1 and 2,
characterized,
that the pan hood (1, 2, 3) is attached to the lid lifting device (19) at three points.
dadurch gekennzeichnet,
daß in den inneren Rohrzylinder (8.2) der unteren, inneren Haube (2) ein wassergekühlter Zugabetrichter (17) für Zuschlagstoffe angeordnet ist.Device according to claims 1-6,
characterized,
that a water-cooled addition funnel (17) for additives is arranged in the inner tube cylinder (8.2) of the lower, inner hood (2).
dadurch gekennzeichnet,
daß in dem Übergang von senkrechter und horizontaler Kühlrohrwand (8) des inneren Rohrzylinders (8.2) eine schwenkbare, wassergekühlte Arbeitstür (16) angeordnet ist.Device according to claim 1,
characterized,
that in the transition from the vertical and horizontal cooling tube wall (8) of the inner tube cylinder (8.2) a pivotable, water-cooled work door (16) is arranged.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19729317 | 1997-07-09 | ||
| DE19729317A DE19729317A1 (en) | 1997-07-09 | 1997-07-09 | Water-cooled pan hood |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0892236A1 true EP0892236A1 (en) | 1999-01-20 |
| EP0892236B1 EP0892236B1 (en) | 2001-04-25 |
Family
ID=7835128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98112468A Expired - Lifetime EP0892236B1 (en) | 1997-07-09 | 1998-07-03 | Cooled ladle cover |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6036915A (en) |
| EP (1) | EP0892236B1 (en) |
| AT (1) | ATE200822T1 (en) |
| DE (2) | DE19729317A1 (en) |
| ES (1) | ES2158635T3 (en) |
| MX (1) | MXPA98005472A (en) |
| TR (1) | TR199801284A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2356919A (en) * | 1999-09-24 | 2001-06-06 | Rhs Paneltech Ltd | Metallurgical ladle or furnace roof |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19855689C2 (en) * | 1998-03-04 | 2001-10-31 | Siemens Ag | AC ladle furnace, especially three-phase ladle furnace |
| IT1310527B1 (en) | 1999-01-20 | 2002-02-18 | Danieli Off Mecc | BUFFER SYSTEM OF THE VOLTADI DELTA REGION AN ELECTRIC ARC OVEN |
| IT1310528B1 (en) | 1999-01-20 | 2002-02-18 | Danieli Off Mecc | SUCTION SYSTEM FOR THE REDUCTION OF FINE AND DUST DIMATERIAL LEAKS IN AN ELECTRIC ARC OVEN |
| IT1315031B1 (en) * | 2000-08-29 | 2003-01-27 | Danieli Off Mecc | Vault COOLING DEVICE FOR ELECTRIC OVENS |
| CN103307892B (en) * | 2013-06-04 | 2015-03-25 | 广州资源环保水电工程有限公司 | High-temperature flue gas flow-guiding device |
| DE102016124481B4 (en) | 2016-12-15 | 2021-07-01 | Ald Vacuum Technologies Gmbh | Melting plant and process |
| KR102077948B1 (en) * | 2018-12-20 | 2020-02-14 | 현대제철 주식회사 | Roof cooling device for electric furnace |
| CN114713811B (en) * | 2022-03-16 | 2023-10-24 | 内蒙古鄂尔多斯电力冶金集团股份有限公司 | Ferroalloy casting smoke dust recycling device and recycling method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3147337A1 (en) * | 1981-11-28 | 1983-06-09 | SIDEPAL S.A. Société Industrielle de Participations Luxembourgeoise, Luxembourg | WATER-COOLED, HOODED LID |
| DE3427086C1 (en) * | 1984-07-19 | 1986-04-10 | Mannesmann AG, 4000 Düsseldorf | Metallurgical vessel |
| DE3602498A1 (en) * | 1985-02-12 | 1986-08-14 | Daidotokushuko K.K., Nagoya, Aichi | PAN OVEN |
| DE4224845A1 (en) * | 1992-07-28 | 1994-02-03 | Gutehoffnungshuette Man | Sealing a circumferential gap between the steel ladle and the ladle hood |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1458876B2 (en) * | 1965-08-19 | 1970-05-21 | Industrie-Companie Kleinewefers GmbH, 4150 Krefeld | Device for blocking and evacuating the gases and dusts generated in the hearth of a metal melting furnace |
| DE2817869C3 (en) * | 1978-04-24 | 1983-04-07 | Krupp Stahl Ag, 4630 Bochum | Lid for an electric arc furnace |
| US4813055A (en) * | 1986-08-08 | 1989-03-14 | Union Carbide Corporation | Furnace cooling system and method |
| JPH0610031A (en) * | 1992-06-25 | 1994-01-18 | Kawasaki Steel Corp | Ladle cover for vod device |
| US5648981A (en) * | 1994-11-22 | 1997-07-15 | Ucar Carbon Technology Corporation | Cooling system for a two component furnace roof |
-
1997
- 1997-07-09 DE DE19729317A patent/DE19729317A1/en not_active Withdrawn
-
1998
- 1998-07-03 TR TR1998/01284A patent/TR199801284A2/en unknown
- 1998-07-03 EP EP98112468A patent/EP0892236B1/en not_active Expired - Lifetime
- 1998-07-03 ES ES98112468T patent/ES2158635T3/en not_active Expired - Lifetime
- 1998-07-03 AT AT98112468T patent/ATE200822T1/en not_active IP Right Cessation
- 1998-07-03 DE DE59800650T patent/DE59800650D1/en not_active Expired - Fee Related
- 1998-07-06 MX MXPA98005472A patent/MXPA98005472A/en unknown
- 1998-07-08 US US09/112,036 patent/US6036915A/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3147337A1 (en) * | 1981-11-28 | 1983-06-09 | SIDEPAL S.A. Société Industrielle de Participations Luxembourgeoise, Luxembourg | WATER-COOLED, HOODED LID |
| DE3427086C1 (en) * | 1984-07-19 | 1986-04-10 | Mannesmann AG, 4000 Düsseldorf | Metallurgical vessel |
| DE3602498A1 (en) * | 1985-02-12 | 1986-08-14 | Daidotokushuko K.K., Nagoya, Aichi | PAN OVEN |
| DE4224845A1 (en) * | 1992-07-28 | 1994-02-03 | Gutehoffnungshuette Man | Sealing a circumferential gap between the steel ladle and the ladle hood |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2356919A (en) * | 1999-09-24 | 2001-06-06 | Rhs Paneltech Ltd | Metallurgical ladle or furnace roof |
| US6418157B1 (en) | 1999-09-24 | 2002-07-09 | Rhs Paneltech Limited | Roof for a metallurgical ladle/furnace |
| GB2356919B (en) * | 1999-09-24 | 2002-08-21 | Rhs Paneltech Ltd | A roof for a metallurgical ladle/furnace |
| DE10047555B4 (en) * | 1999-09-24 | 2006-10-26 | Rhs Paneltech Ltd. | Cover for metallurgical smelting furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| US6036915A (en) | 2000-03-14 |
| ES2158635T3 (en) | 2001-09-01 |
| MXPA98005472A (en) | 2004-10-28 |
| DE19729317A1 (en) | 1999-01-14 |
| DE59800650D1 (en) | 2001-05-31 |
| EP0892236B1 (en) | 2001-04-25 |
| TR199801284A3 (en) | 1999-01-18 |
| ATE200822T1 (en) | 2001-05-15 |
| TR199801284A2 (en) | 1999-01-18 |
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