EP0006084B1 - Apparatus for collecting and withdrawing off-gases - Google Patents

Apparatus for collecting and withdrawing off-gases Download PDF

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Publication number
EP0006084B1
EP0006084B1 EP79890008A EP79890008A EP0006084B1 EP 0006084 B1 EP0006084 B1 EP 0006084B1 EP 79890008 A EP79890008 A EP 79890008A EP 79890008 A EP79890008 A EP 79890008A EP 0006084 B1 EP0006084 B1 EP 0006084B1
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EP
European Patent Office
Prior art keywords
hood
crane
chimney
trolley
crane trolley
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP79890008A
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German (de)
French (fr)
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EP0006084A1 (en
Inventor
Friedrich Laimer
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.)
Voestalpine AG
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Voestalpine AG
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Filing date
Publication date
Priority claimed from AT391678A external-priority patent/AT357577B/en
Application filed by Voestalpine AG filed Critical Voestalpine AG
Publication of EP0006084A1 publication Critical patent/EP0006084A1/en
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Publication of EP0006084B1 publication Critical patent/EP0006084B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/0025—Charging or loading melting furnaces with material in the solid state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
    • B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D45/00—Equipment for casting, not otherwise provided for
    • B22D45/005—Evacuation of fumes, dust or waste gases during manipulations in the foundry
    • 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
    • C21C5/38—Removal of waste gases or dust
    • C21C5/40—Offtakes or separating apparatus for converter waste gases or dust
    • 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 device for collecting and discharging exhaust gases generated during charging or pouring of metallurgical vessels in a steelworks, the goods to be charged or poured being brought into or out of the operating position with a container that can be moved by a crane a fume hood, which in the operating position covers the container and the mouth of the metallurgical vessel and is connected to an exhaust gas line system, the fume hood having one or more exhaust openings which can be connected to the exhaust gas line system at predetermined locations above the working positions.
  • the crane driver has no opportunity to observe the hooking of the crane hooks in the corresponding eyelets of the metallurgical vessel.
  • this known device there is the difficulty that the extractor hood, due to the need to move the crane towards the metallurgical vessel during charging, e.g. Converter, can only be designed up to a certain size; it is too small for the complete detection of the smoke, which is why some of the exhaust gases escape past the extractor hood.
  • the invention aims at avoiding these disadvantages and difficulties and has as its object to create a device with which the gases generated during the production of steel are almost completely recorded, this device being advantageous for a plurality of work stations where smoke is generated, can be used, but the hall crane can be moved unhindered by stationary installations in the different operating positions.
  • the unit consisting of crane trolley and extractor hood can be moved between different operating positions of the metallurgical vessel, e.g. between the filling position and the pouring position of a pig iron mixer, with the extractor hood being connectable to a chimney in every operating position.
  • the opening in the fume cupboard is advantageously widened and preferably extended in the direction of travel of the crane trolley, corrective movements of the crane trolley being able to be carried out without adversely affecting the gas discharge.
  • a flange which is extended in the direction of travel of the crane trolley to be attached to the connection opening of the extractor hood.
  • FIG. 1 is a side view of the device on a pig iron emptying pit, partly in section
  • Fig. 2 is a side view of the device on a pig iron mixer, partly in section, in two positions
  • Fig. 3 is a side view of the Device at a converter stand
  • Fig. 4 shows a front view of the device, partly in section.
  • Figure 5 is a page View of the connection position of the extractor hood to a chimney opening
  • FIGS. 6 and 6a show sections along the line VI-VI of FIG. 5, with FIG. 6 corresponding to the extended position and FIG. 6a to the broken line position in FIG. 5.
  • a bridge crane 2 mounted on supports 1 can be moved along rails 3 along a steelworks hall.
  • the crane trolley 5 is guided on the crane bridge 4 and, according to the invention, forms a movable unit with a hood 6 surrounding it.
  • the extractor hood is provided with one or more discharge openings 7.
  • In the roof 8 of the hall are at predetermined locations, u. mounted above the smoke-generating work stations, chimney sockets 9, which if necessary lead to a common suction and filter system with manifolds 10.
  • the chimney stubs have a funnel-shaped part 11.
  • the connecting part of the hood 6 is formed with a flange 12 which is elongated in the running direction of the crane trolley, as can be seen more clearly in FIGS. 5 and 6a.
  • Fig. 6 corresponds to the fully extended position of Fig. 5, in which a correction can be made in both directions back and forth.
  • Fig. 6a corresponds to the dashed position of Fig. 5.
  • the openings of the chimney nozzles can be opened and closed with panels, flaps or the like. Limit switches, gate controls or similar devices can be provided for their actuation.
  • a chimney nozzle 9 adjoining the extractor hood 6 is opened, while advantageously all the other chimney nozzles remain closed in order to prevent false air being drawn into the filter system.
  • the hood can, as in the
  • FIG. 1 to 4 is shown to be equipped with guide plates 13 laterally attached to its lower edge and a chain curtain 14 in order to bring about improved smoke guidance.
  • the guide plates are guided down between the bridge girders 4, 4 '.
  • a mesh 15 can be provided on the underside to prevent flames from penetrating.
  • Various possible uses of the device according to the invention are illustrated in the individual figures. u. between in Fig. 1 at a pig iron dump.
  • a pig iron transport pan 16 hangs on the hook 17 of the crane trolley 5 and is fed by a torpedo mixer 18.
  • the smoke rising during the loading process is taken up by the hood 6 and discharged through the chimney nozzle 9, which nozzle is at a distance A from the crane support 1.
  • FIG. 2 illustrates the use of the device according to the invention when pouring pig iron into a pig iron mixer and when pouring pig iron from the mixer into a transport pan.
  • the unit according to the invention consisting of crane trolley 5 and extractor hood 6 has been moved into the operating position shown in dash-dotted lines, the snout of the pig iron pan 19 coming to rest above the pouring opening 20 of the pig iron mixer 21, so that the pouring process can begin by tilting the pan 19.
  • the associated chimney socket 9 ' to which the extractor hood connects, is located at a distance A 2 from the crane support.
  • the hood 6 is moved into the fully extended position, the associated chimney socket 9 ′′ being at a distance A 3 from the crane support 1.
  • FIG. 3 shows the charging of a converter 22 by means of a scrap chute 23 or a pig iron transport pan 16, the converter being in the tilted position.
  • the extractor hood 6, which is positioned over the mouth of the converter 22 and the charging containers 16, 23, adjoins a chimney nozzle 9 ′′ ′ , which is again at a distance A 4 from a crane support 1.
  • a main extractor hood 24 is provided centrally above the converter stand which absorbs the exhaust gases generated during the refreshing in the upright position of the converter 22.

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

Description

Die Erfindung betrifft eine Einrichtung zum Auffangen und Ableiten von beim Chargieren bzw. Abgiessen von metallurgischen Gefässen entstehenden Abgasen in einem Stahlwerk, wobei das zu chargierende bzw. abgegossene Gut mit einem mittels eines Kranes verfahrbaren Behälter in die bzw. aus der Betriebsstellung gebracht wird, mit einer Abzugshaube, die in der Betriebsstellung den Behälter und die Mündung des metallurgischen Gefässes überdeckt und an ein Abgasleitungssystem angeschlossen ist, wobei die Abzugshaube eine oder mehrere Abzugsöffnungen aufweist, die an vorbestimmten Stellen oberhalb der Arbeitsstände an das Abgasleitungssystem anschliessbar sind.The invention relates to a device for collecting and discharging exhaust gases generated during charging or pouring of metallurgical vessels in a steelworks, the goods to be charged or poured being brought into or out of the operating position with a container that can be moved by a crane a fume hood, which in the operating position covers the container and the mouth of the metallurgical vessel and is connected to an exhaust gas line system, the fume hood having one or more exhaust openings which can be connected to the exhaust gas line system at predetermined locations above the working positions.

Bei der Erzeugung von Stahl kommt es an verschiedenen Stellen des Stahlwerkes zu starker Rauchentwicklung, z.B. beim Umleeren von Roheisen aus einem Torpedomischer in Pfannen, beim Einfüllen von Roheisen in den Roheisenmischer und beim Beschicken von Pfannen aus dem Roheisenmischer. Weiters entsteht eine starke Rauchentwicklung bei den Chargiervorgängen von Schrott und Roheisen in den Konverter. Bei diesen Chargier-, Umleer- und Abgiessvorgängen hängen die das schmelzflüssige Gut enthaltenden Behälter mittels eines Krangehänges an einem Kran, und es ist schwierig, an den verschiedenen Stellen, an denen die Rauchtentwicklung stattfindet, unmittelbar wirksame Absaugeinrichtungen vorzusehen.When steel is produced, there is a lot of smoke at various points in the steelworks, e.g. when emptying pig iron from a torpedo mixer into pans, when pouring pig iron into the pig iron mixer and when loading pans from the pig iron mixer. Furthermore, there is a strong smoke development during the charging processes of scrap and pig iron in the converter. In these charging, emptying and pouring operations, the containers containing the molten material are suspended from a crane by means of a crane hanger, and it is difficult to provide effective suction devices at the various places where the smoke development takes place.

Die Entstaubungsprobleme beim Chargieren und Abstechen metallurgischer Gefässe, insbesondere eines Roheisenmischers oder eines Elektroofens, sind nicht befriedigend gelöst. Bei der in letzter Zeit häufig angewandten Methode der Dachabsaugung werden oberhalb der rauchentwickelnden Aggregate, an den höchsten Stellen im Dach der Stahlwerkshalle Absaugeinrichtungen angeordnet. Durch diese wird aber nicht nur der Rauch, sondern auch die Hallenluft abgesaugt und die Filteranlage zusätzlich belastet. Da der Abstand zwischen einem rauchentwickelnden Aggregat und den Absaugeinrichtungen im Hallendach sehr gross ist, besteht auch die Gefahr, dass bei geringerem Auftrieb der Rauch- bzw. Staubteilchen diese vom Saugstrom nicht erfasst werden und wieder absinken. Deshalb müssen die Saugzuganlagen leistungsmässig sehr stark ausgelegt werden, was hohe Investitionskosten verursacht.The dust removal problems when charging and parting off metallurgical vessels, in particular a pig iron mixer or an electric furnace, have not been satisfactorily solved. In the recently used method of roof suction, suction devices are arranged above the smoke-generating units, at the highest points in the roof of the steelworks hall. Through this, not only the smoke is extracted, but also the hall air and the filter system is additionally burdened. Since the distance between a smoke-generating unit and the suction devices in the hall roof is very large, there is also the risk that, with less buoyancy, the smoke or dust particles will not be caught by the suction flow and will sink again. Therefore, the suction systems have to be very powerful, which causes high investment costs.

Aus der DE-B-20 59 205 ist eine Einrichtung der eingangs beschriebenen Art bekannt, bei der die Abzugshaube an der Unterseite einer Traverse eines Hebemittels befestigt ist, so dass die Abzugshaube stets direkt über dem rauchentwikkelnden metallurgischen Gefäss und mit dem Hebemittel verfahrbar ist. Diese bekannte Abzugshaube ist gemeinsam mit der Traverse heb- und senkbar, was bei Verwendung der Traverse in stets gleicher Höhe zwar hinzunehmen sein mag, jedoch für den Stahlwerksbetrieb in der Praxis störend ist, da das Chargieren bzw. Abgiessen in stark unterschiedlichen Höhen vor sich geht. Man müsste daher eine Vielzahl von ortsfesten Absaugstutzen knapp nebeneinander in unterschiedlichen Höhen vorsehen, wodurch die Stahlwerkshalle beengt und unübersichtlich und die Bewegungsfreiheit des Hebemittels eingeschränkt wird. Weiters hat der Kranfahrer nicht die Möglichkeit, das Einhängen der Kranhaken in die entsprechenden Ösen des metallurgischen Gefässes zu beobachten. Ausserdem ist bei dieser bekannten Einrichtung die Schwierigkeit gegeben, dass die Abzugshaube wegen des beim Chargieren notwendigen Heranfahrens des Kranes zum metallurgischen Gefäss, z.B. Konverter, nur bis zu einer bestimmten Grösse ausgelegt werden kann; sie ist für die vollständige Erfassung des entstehenden Rauches zu klein, weshalb ein Teil der Abgase an der Abzugshaube vorbei entweicht.From DE-B-20 59 205 a device of the type described is known, in which the extractor hood is attached to the underside of a cross member of a lifting means, so that the extractor hood can always be moved directly over the metallurgical vessel which develops smoke and with the lifting means. This well-known extractor hood can be raised and lowered together with the traverse, which may be acceptable when using the traverse at the same height, but is disruptive for steelworks in practice, since charging or casting takes place at very different heights . It would therefore be necessary to provide a large number of fixed suction nozzles next to each other at different heights, which means that the steelworks hall is cramped and confusing and the freedom of movement of the lifting means is restricted. Furthermore, the crane driver has no opportunity to observe the hooking of the crane hooks in the corresponding eyelets of the metallurgical vessel. In addition, with this known device there is the difficulty that the extractor hood, due to the need to move the crane towards the metallurgical vessel during charging, e.g. Converter, can only be designed up to a certain size; it is too small for the complete detection of the smoke, which is why some of the exhaust gases escape past the extractor hood.

Die Erfindung bezweckt die Vermeidung dieser Nachteile und Schwierigkeiten und stellt sich die Aufgabe, eine Einrichtung zu schaffen, mit der die bei Erzeugung von Stahl entstehenden Gase nahezu zur Gänze erfasst werden, wobei diese Einrichtung vorteilhaft für eine Mehrzahl von Arbeitsständen, an denen Rauch entsteht, eingesetzt werden kann, der Hallenkran jedoch ungehindert von stationären Einbauten in die verschiedenen Betriebsstellungen verfahrbar ist.The invention aims at avoiding these disadvantages and difficulties and has as its object to create a device with which the gases generated during the production of steel are almost completely recorded, this device being advantageous for a plurality of work stations where smoke is generated, can be used, but the hall crane can be moved unhindered by stationary installations in the different operating positions.

Diese Aufgabe wird bei einer Einrichtung der eingangs bezeichneten Art erfindungsgemäss dadurch gelöst, dass eine den Behälter führende Kranlaufkatze mit einer sie umgebenden Abzugshaube eine verfahrbare Einheit bildet.This object is achieved according to the invention in a device of the type described in the introduction in that a crane trolley guiding the container forms a movable unit with a fume hood surrounding it.

Nach einer bevorzugten Ausführungsform ist die aus Kranlaufkatze und Abzugshaube bestehende Einheit zwischen verschiedenen Betriebsstellungen des metallurgischen Gefässes verfahrbar, z.B. zwischen der Einfüllposition und der Ausgiessposition eines Roheisenmischers, wobei in jeder Betriebsstellung die Abzugshaube an einen Kamin anschliessbar ist.According to a preferred embodiment, the unit consisting of crane trolley and extractor hood can be moved between different operating positions of the metallurgical vessel, e.g. between the filling position and the pouring position of a pig iron mixer, with the extractor hood being connectable to a chimney in every operating position.

Vorteilhaft ist die Öffnung im Abzugskamin erweitert und vorzugsweise in Fahrtrichtung der Kranlaufkatze verlängert, wobei Korrekturbewegungen der Kranlaufkatze ohne Beeinträchtigung des Gasabzuges durchführbar sind. Hierfür ist es auch zweckmässig, dass an der Anschlussöffnung der Abzugshaube ein in Laufrichtung der Kranlaufkatze verlängerter Flansch befestigt ist. Mit dieser Ausbildung wird bei Korrekturbewegungen das Ansaugen von Falschluft vermieden.The opening in the fume cupboard is advantageously widened and preferably extended in the direction of travel of the crane trolley, corrective movements of the crane trolley being able to be carried out without adversely affecting the gas discharge. For this purpose, it is also expedient for a flange which is extended in the direction of travel of the crane trolley to be attached to the connection opening of the extractor hood. With this training, the sucking in of false air is avoided during corrective movements.

Die Erfindung ist anhand der Zeichnung näher erläutert, wobei Fig. 1 eine Seitenansicht der Einrichtung an einer Roheisenumleergrube, teilweise im Schnitt, Fig. 2 eine Seitenansicht der Einrichtung an einem Roheisenmischer, teilweise im Schnitt, in zwei Stellungen, Fig. 3 eine Seitenansicht der Einrichtung an einem Konverterstand und Fig. 4 eine Vorderansicht der Einrichtung, teilweise im Schnitt, zeigen. Fig. 5 ist eine Seitenansicht der Anschlussstellung der Abzugshaube an einer Kaminöffnung und die Fig. 6 und 6a zeigen Schnitte nach der Linie VI-VI der Fig. 5, wobei Fig. 6 der stark ausgezogenen und Fig. 6a der strichlierten Stellung in Fig. 5 entsprechen.The invention is explained in more detail with reference to the drawing, in which Fig. 1 is a side view of the device on a pig iron emptying pit, partly in section, Fig. 2 is a side view of the device on a pig iron mixer, partly in section, in two positions, Fig. 3 is a side view of the Device at a converter stand and Fig. 4 shows a front view of the device, partly in section. Figure 5 is a page View of the connection position of the extractor hood to a chimney opening and FIGS. 6 and 6a show sections along the line VI-VI of FIG. 5, with FIG. 6 corresponding to the extended position and FIG. 6a to the broken line position in FIG. 5.

Ein auf Stützen 1 gelagerter Brückenkran 2 ist längs einer Stahlwerkshalle auf Schienen 3 verfahrbar. Auf der Kranbrücke 4 ist die Kranlaufkatze 5 geführt, die erfindungsgemäss mit einer sie umgebenden Abzugshaube 6 eine verfahrbare Einheit bildet. Die Abzugshaube ist mit einer oder mehreren Abzugsöffnungen 7 versehen. Im Dach 8 der Halle sind an vorbestimmten Stellen, u. zw. oberhalb der rauchentwickelnden Arbeitsstände, Kaminstutzen 9 montiert, die gegebenenfalls mit Sammelleitungen 10 zu einer gemeinsamen Absaug- und Filteranlage führen. Die Kaminstutzen besitzen einen trichterförmig erweiterten Teil 11. Der Anschlussteil der Haube 6 ist mit einem in Laufrichtung der Kranlaufkatze verlängerten Flansch 12 ausgebildet, wie deutlicher in den Fig. 5, und 6a ersichtlich ist. Nach Einfahren der Abzugshaube in die Betriebsstellung sind Korrekturbewegungen in der Fahrtlängsrichtung möglich, während welcher infolge der länglichen Ausbildung des Flansches 12 die Dichtung erhalten bleibt. Fig. 6 entspricht der voll ausgezogenen Stellung der Fig. 5, in der in beiden Richtungen vor und zurück eine Korrektur vorgenommen werden kann. Fig. 6a entspricht der strichlierten Stellung der Fig. 5. Die Öffnungen der Kaminstutzen können mit Blenden, Klappen od. dgl. geöffnet und geschlossen werden, wobei für deren Betätigung Endschalter, Kulissensteuerungen oder ähnliche Vorrichtungen vorgesehen sein können.A bridge crane 2 mounted on supports 1 can be moved along rails 3 along a steelworks hall. The crane trolley 5 is guided on the crane bridge 4 and, according to the invention, forms a movable unit with a hood 6 surrounding it. The extractor hood is provided with one or more discharge openings 7. In the roof 8 of the hall are at predetermined locations, u. mounted above the smoke-generating work stations, chimney sockets 9, which if necessary lead to a common suction and filter system with manifolds 10. The chimney stubs have a funnel-shaped part 11. The connecting part of the hood 6 is formed with a flange 12 which is elongated in the running direction of the crane trolley, as can be seen more clearly in FIGS. 5 and 6a. After the hood has been moved into the operating position, corrective movements in the longitudinal direction of the drive are possible, during which the seal is retained due to the elongated design of the flange 12. Fig. 6 corresponds to the fully extended position of Fig. 5, in which a correction can be made in both directions back and forth. Fig. 6a corresponds to the dashed position of Fig. 5. The openings of the chimney nozzles can be opened and closed with panels, flaps or the like. Limit switches, gate controls or similar devices can be provided for their actuation.

In der Betriebsstellung wird die an die Abzugshaube 6 anschliessende Öffnung eines Kaminstutzens 9 geöffnet, während vorteilhaft alle anderen Kaminstutzen geschlossen bleiben, um eine Ansaugung von Falschluft in die Filteranlage zu vermeiden. Die Abzugshaube kann, wie in derIn the operating position, the opening of a chimney nozzle 9 adjoining the extractor hood 6 is opened, while advantageously all the other chimney nozzles remain closed in order to prevent false air being drawn into the filter system. The hood can, as in the

Fig. 1 bis 4 dargestellt ist, mit an ihrem unteren Rand seitlich angefügten Leitblechen 13 und einem Kettenvorhang 14 ausgestattet sein, um eine verbesserte Rauchführung zu bewirken. Die Leitbleche sind zwischen den Brückenträgern 4, 4' nach unten geführt. Weiters kann an der Unterseite ein Maschengitter 15 vorgesehen sein, um ein Durchschlagen von Flammen zu verhindern. In den einzelnen Figuren sind verschiedene Einsatzmöglichkeiten der erfindungsgemässen Einrichtung veranschaulicht. u. zw. in Fig. 1 an einer Roheisenumleergrube. Hier hängt eine Roheisentransportpfanne 16 am Haken 17 der Kranlaufkatze 5 und wird von einem Torpedomischer 18 beschickt. Der während des Beschickungsvorganges aufsteigende Rauch wird von der Abzugshaube 6 aufgenommen und durch den Kaminstutzen 9 abgeführt, welcher Stutzen sich im Abstand A, von der Kranstütze 1 befindet.1 to 4 is shown to be equipped with guide plates 13 laterally attached to its lower edge and a chain curtain 14 in order to bring about improved smoke guidance. The guide plates are guided down between the bridge girders 4, 4 '. Furthermore, a mesh 15 can be provided on the underside to prevent flames from penetrating. Various possible uses of the device according to the invention are illustrated in the individual figures. u. between in Fig. 1 at a pig iron dump. Here, a pig iron transport pan 16 hangs on the hook 17 of the crane trolley 5 and is fed by a torpedo mixer 18. The smoke rising during the loading process is taken up by the hood 6 and discharged through the chimney nozzle 9, which nozzle is at a distance A from the crane support 1.

Fig. 2 veranschaulicht den Einsatz der erfindungsgemässen Einrichtung beim Eingiessen von Roheisen in einen Roheisenmischer und beim Ausgiessen von Roheisen aus dem Mischer in eine Transportpfanne. In der Eingiesstellung ist die erfindungsgemäss aus Kranlaufkatze 5 und Abzugshaube 6 bestehende Einheit in die strichpunktiert gezeichnete Betriebsstellung gefahren, wobei die Schnauze der Roheisenpfanne 19 oberhalb der Eingussöffnung 20 des Roheisenmischers 21 zu stehen kommt, sodass durch Kippen der Pfanne 19 der Einfüllvorgang beginnen kann. Der zugehörige Kaminstutzen 9', an den die Abzugshaube anschliesst, befindet sich im Abstand A2 von der Kranstütze. Beim Beschicken der Transportpfanne 16 ist die Haube 6 in die voll ausgezogene Stellung gefahren, wobei der zugehörige Kaminstutzen 9" sich im Abstand A3 von der Kranstütze 1 befindet.2 illustrates the use of the device according to the invention when pouring pig iron into a pig iron mixer and when pouring pig iron from the mixer into a transport pan. In the pouring position, the unit according to the invention consisting of crane trolley 5 and extractor hood 6 has been moved into the operating position shown in dash-dotted lines, the snout of the pig iron pan 19 coming to rest above the pouring opening 20 of the pig iron mixer 21, so that the pouring process can begin by tilting the pan 19. The associated chimney socket 9 ', to which the extractor hood connects, is located at a distance A 2 from the crane support. When loading the transport pan 16, the hood 6 is moved into the fully extended position, the associated chimney socket 9 ″ being at a distance A 3 from the crane support 1.

In Fig. 3 ist die Chargierung eines Konverters 22 mittels einer Schrottschurre 23 oder einer Roheisentransportpfanne 16 veranschaulicht, wobei sich der Konverter in gekippter Stellung befindet. Die über der Mündung des Konverters 22 und der Chargierbehälter 16, 23 in Stellung gebrachte Abzugshaube 6 schliesst dabei an einen Kaminstutzen 9"' an, der sich wieder im Abstand A4 von einer Kranstütze 1 befindet. Zentral über dem Konverterstand ist eine Hauptabzugshaube 24 vorgesehen, die die während des Frischens in aufrechter Stellung des Konverters 22 entstehenden Abgase aufnimmt.3 shows the charging of a converter 22 by means of a scrap chute 23 or a pig iron transport pan 16, the converter being in the tilted position. The extractor hood 6, which is positioned over the mouth of the converter 22 and the charging containers 16, 23, adjoins a chimney nozzle 9 ″ ′ , which is again at a distance A 4 from a crane support 1. A main extractor hood 24 is provided centrally above the converter stand which absorbs the exhaust gases generated during the refreshing in the upright position of the converter 22.

Claims (4)

1. Arrangement for capturing and conducting away flue gases forming during charging of, and pouring off from, metallurgical vessels (18, 21, 22) in a steel making plant, the material to be charged and poured off being brought into, and out of, the operating position by a container (16, 29, 23) which is displaceable by means of a crane (2), comprising a hood (6), which, in the operating position, covers the container (16,19, 23) and the mouth of the metallurgical vessel (18, 21, 22) and is connected to a flue gas conduit system (9, 9', 9'', 9''', 10, 11), the hood (6) having one or more discharge openings (7) that are connectable to the flue gas conduit system (9, 9', 9'', 9''', 10,11) at predetermined sites above the working stands, characterised in that a crane trolley (5) moving the container (16, 19, 23) forms a displaceable unit with a hood (6) surrounding it.
2. Arrangement according to claim 1, characterised in that the unit consisting of the crane trolley (5) and the hood (6) is displaceable between different operating positions of the metallurgical vessel (18, 21, 22), e.g. between the filling-in position and the pouring-out position of a pig iron mixer (21), the hood (6) being connectable to a chimney (9, 9', 9", 9''') in each operating position.
3. Arrangement according to claim 1 or 2, characterised in that the opening (11) in the flue chimney (9) is widened and preferably elongated in the moving direction of the crane trolley (5), cor- rectional movements of the crane trolley (5) being feasible without impeding the gas discharge.
4. Arrangement according to claims 1 to 3, characterised in that a flange (12) elongated in the running direction of the trolley (5) is fastened to the connection opening (7) of the hood (6).
EP79890008A 1978-05-30 1979-05-29 Apparatus for collecting and withdrawing off-gases Expired EP0006084B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT3916/78 1978-05-30
AT391678A AT357577B (en) 1973-08-06 1978-05-30 DEVICE FOR COLLECTING AND DISCHARGING EXHAUST GAS

Publications (2)

Publication Number Publication Date
EP0006084A1 EP0006084A1 (en) 1979-12-12
EP0006084B1 true EP0006084B1 (en) 1981-10-28

Family

ID=3557178

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79890008A Expired EP0006084B1 (en) 1978-05-30 1979-05-29 Apparatus for collecting and withdrawing off-gases

Country Status (4)

Country Link
US (1) US4286776A (en)
EP (1) EP0006084B1 (en)
JP (1) JPS54155911A (en)
DE (1) DE2961157D1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1146773B (en) * 1981-04-23 1986-11-19 Daneco Danieli Ecologia Spa SECONDARY FUME EXTRACTION HOODS FOR STEEL AND FOUNDRIES
IT1175107B (en) 1983-07-27 1987-07-01 Daneco Danieli Ecologia Spa REFINEMENTS FOR SECONDARY FUME EXTRACTION HOODS FOR STEEL AND FOUNDRIES
US4653064A (en) * 1985-10-02 1987-03-24 Pennsylvania Engineering Corporation Gas collector for metallurgical vessels
US5456631A (en) * 1994-08-12 1995-10-10 Eisenmann Corporation Hood style exhaust system construction
CN105499247B (en) * 2015-12-31 2017-12-15 山东昌宁集团有限公司 Inhale dust pelletizing system and its dust removal method in a kind of rotary top

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE567990A (en) *
DE30845C (en) * V. MASEK in Karolinenthal, Böhmen Rotatable telescopic chimney
US2693749A (en) * 1950-11-13 1954-11-09 Western Electric Co Exhaust system for ladles
US2923227A (en) * 1957-12-16 1960-02-02 Harry C Hawley Fumes control system
DE1228287B (en) * 1963-08-06 1966-11-10 Gussstahlwerk Oberkassel Ag Vo Suction device for the pouring ladle and the tapping channel of a melting furnace
US3380371A (en) * 1966-12-27 1968-04-30 Hawley Manufacturing Corp Fumes control system including movable hood
FR1569540A (en) * 1967-09-01 1969-05-30
US4099709A (en) * 1977-01-12 1978-07-11 Albert Calderon Method and apparatus for controlling emissions from oxygen steelmaking furnaces
AT357580B (en) * 1977-02-04 1980-07-25 Voest Alpine Ag EXTRACTOR COVER ON A PALE STANDING WITH A TILTABLE CONVERTER
AT357581B (en) * 1977-05-10 1980-07-25 Voest Alpine Ag Fume hood for deriving the smoke or smoke rising while charging a metal vessel. EXHAUST

Also Published As

Publication number Publication date
DE2961157D1 (en) 1982-01-07
EP0006084A1 (en) 1979-12-12
US4286776A (en) 1981-09-01
JPS54155911A (en) 1979-12-08

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