EP0799323B1 - Tilting metallurgical unit comprising several vessels - Google Patents

Tilting metallurgical unit comprising several vessels Download PDF

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Publication number
EP0799323B1
EP0799323B1 EP95942719A EP95942719A EP0799323B1 EP 0799323 B1 EP0799323 B1 EP 0799323B1 EP 95942719 A EP95942719 A EP 95942719A EP 95942719 A EP95942719 A EP 95942719A EP 0799323 B1 EP0799323 B1 EP 0799323B1
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EP
European Patent Office
Prior art keywords
vessel
treatment
melting vessel
melting
metallurgical
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 - Lifetime
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EP95942719A
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German (de)
French (fr)
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EP0799323A1 (en
Inventor
Gerhard Fuchs
Joachim Ehle
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Arcmet Technologie GmbH
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Arcmet Technologie GmbH
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Publication of EP0799323A1 publication Critical patent/EP0799323A1/en
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5252—Manufacture of steel in electric furnaces in an electrically heated multi-chamber furnace, a combination of electric furnaces or an electric furnace arranged for associated working with a non electric furnace
    • 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
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/04—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces of multiple-hearth type; of multiple-chamber type; Combinations of hearth-type furnaces
    • 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
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/06—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces with movable working chambers or hearths, e.g. tiltable, oscillating or describing a composed movement
    • F27B3/065—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces with movable working chambers or hearths, e.g. tiltable, oscillating or describing a composed movement tiltable
    • 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
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/18—Arrangements of devices for charging
    • F27B3/183—Charging of arc furnaces vertically through the roof, e.g. in three points
    • F27B3/186—Charging in a vertical chamber adjacent to the melting chamber
    • 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
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/19—Arrangements of devices for discharging
    • 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
    • F27D3/15—Tapping equipment; Equipment for removing or retaining slag
    • F27D3/1509—Tapping equipment
    • 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
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/08—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces heated electrically, with or without any other source of heat
    • F27B3/085—Arc furnaces

Definitions

  • the invention relates to a tiltable metallurgical unit for melting metallic insert material, in particular iron-containing material, and for aftertreatment the molten metal.
  • EP-0 240 485-B1 describes a plant for the production of steel from scrap and If necessary, aggregates become known, with a shaft furnace part that a liquid sump from premelt-absorbing soil and laterally in the lower Has part of its interior opening heating devices and with a the shaft furnace part integrally connected hearth furnace part, in which the premelt can be transferred from the shaft furnace part.
  • the stove section immediately adjoins the Lower part of the shaft furnace part.
  • the Bottom is arranged lower than the bottom of the shaft furnace part.
  • the entire, made of shaft furnace part and stove part existing unit is tiltable and perpendicular to one that Center of the shaft furnace part with the horizontal connecting the center of the stove part Axis. By tilting perpendicular to this axis you can tilt required forces are kept low despite the large masses to be moved.
  • the stove section has an eccentrically arranged bottom cut for the steel and a work door in a side wall for removing the slag.
  • Both the The lower part of the shaft furnace part and that of the hearth furnace part have a floor plan circular interior, the interior of the shaft furnace part the interior of the hearth part in the floor plan and the transition from one room to the other another is narrowed.
  • A serves as the heating device for the stove part Arc unit while as a heating device for the shaft furnace part one
  • a plurality of plasma torches is used, which are located in the lower region of the shaft furnace part along the Are arranged circumferentially distributed.
  • the bottom recess of the shaft furnace part is relatively shallow and the upper edge the overflow weir has a small height compared to the bottom recess, so that at the beginning of a melting process, only a small amount of the premelt in the Bottom recess of the shaft furnace part is retained and after the sump formation Premelt flows continuously through the overflow weir into the stove section.
  • the area of the overflow weir is to prevent the melt from freezing
  • the inclination of the plasma torch is adjusted so that the premelt is directed towards the overflow weir is overheated and there is still a plasma torch between the
  • the shaft furnace part and the stove part are provided so that the premelt in the area of Overflow weir can be overheated and the continuous flow of the premelt is ensured.
  • the metallurgical treatment in the hearth section begins as soon as half the bath depth is reached.
  • the melt is Tapping temperature heated. Premelt flows continuously during this process the shaft furnace part.
  • the tapping weight in the hearth part is reached, by Tilting of the unit tapped without slag using an eccentric bottom tap opening.
  • EP-0 548 042-A2 differs from that System according to EP-0 240 485-B1 essentially in that as a heating device for a furnace vessel forming the shaft furnace, which is connected to an electric stove is, instead of the plasma torch graphite electrodes used in projecting extensions of the lower part of the shaft furnace can be inserted.
  • DE-25 04 911-A1 is a device for melting scrap, sponge iron or the like in a shaft furnace by means of a fuel-oxygen flame from below and an outlet for the melted material in the bottom of the Shaft furnace for continuous steelmaking has become known, with the Shaft furnace, a heating vessel attached to this side is integrated.
  • the shaft furnace has an outlet for molten material at the deepest point of its floor Metal, which is connected to the superheating vessel via a channel and also in a slag drain on the side wall.
  • the overheating vessel has an overflow, which is slightly below the height of the slag outlet. That in Overheating vessel overheated liquid metal continuously flows over the overflow and is via the connecting channel to the shaft furnace through the melted in it liquid metal continuously replaced.
  • the superheating vessel is arced heated. The unit cannot be tilted.
  • US-A-4 552 343 describes a tiltable arc furnace with a closed, pouring spout attached to the vessel for slag-free tapping. In the pouring spout there is no treatment or further heating of the melt.
  • Japanese laid-open patent publication JP-2-290 912 A describes a tiltable, metallurgical Unit that contains a first and a second furnace chamber by a weir are separated. Separate heating devices are assigned to the furnace chambers. In the first The feedstock is melted and the in the second furnace chamber Melt treated. So that the steel of the second chamber that is being treated not be mixed with the steel of the first chamber that is being melted can, after tapping the steel of the second chamber by tilting the vessel the steel melted in the first chamber and held back by the weir into the transferred to the second chamber for further treatment, while after the Tilting back the vessel melted new steel at the same time in the first chamber becomes.
  • the second chamber lies in the tilting direction behind the first chamber, d. H. aligned to the direction of tilt. This leads to an overall vessel, which has large dimensions in this direction. So that are for the tipping process great forces required.
  • the invention has for its object a metallurgical unit of the last to make the type described compact and in such an aggregate when tilting to keep moving masses as low as possible.
  • Melting vessel and treatment vessel should be optimally trained independently of each other with regard to their objectives and can be operated.
  • the energy consumption of the unit per ton should be produced Metal are minimized and the hot exhaust gases from the treatment vessel, and the melting vessel can be used for preheating the feed material be.
  • a melting vessel that a stove for Inclusion of a substantial part, preferably the entire amount of a furnace batch contains and a treatment vessel attached to the side of the melting vessel for receiving the molten metal from the furnace of the melting vessel and to the metallurgical Treatment of the melt combined into an aggregate that can be tilted about a tilt axis or can be passed along a roller track.
  • a treatment vessel attached to the side of the melting vessel for receiving the molten metal from the furnace of the melting vessel and to the metallurgical Treatment of the melt combined into an aggregate that can be tilted about a tilt axis or can be passed along a roller track.
  • Via a channel between the melting vessel and the treatment vessel which is arranged at a height such that the desired Amount of molten metal can be retained in the melting vessel, this is at Tilting the unit into the treatment vessel can be transferred.
  • Transferring the molten metal does not happen continuously over an overflow weir, but in batches only when the desired amount of molten metal has accumulated in the melting vessel Has.
  • the hot molten metal flows through the channel when the unit tips over to the treatment vessel in a short time, so that there is no risk of cooling down here consists.
  • the Metal melt transferred into the treatment vessel during the previous tilting process treated metallurgically, so that both processes run parallel to each other, the Melting vessel in its size and equipment with regard to the melting process can be optimized and the treatment vessel with regard to the metallurgical Treatment.
  • Heat is supplied to the two vessels by burning fossil fuels
  • Fuels, supply of oxygen-containing gases and possibly coal through soil stones or under-bath jets and can be done by electrical energy should be tuned in this way be that the melting time corresponds approximately to the treatment time, so that after the Tapping the treatment vessel through the metal melt formed in the melting vessel Tilting the unit into the treatment vessel and immediately after that parallel operation of the two vessels can be continued. Since during the Melting process, the melt formed in the melting vessel does not enter the treatment vessel overflows, but the process of transferring the melt by tilting the Is controlled aggregate, the metallurgical treatment in the treatment vessel is not disrupted by inflowing melt.
  • the treatment vessel is not aligned with the melting vessel in the tilting direction or in a perpendicular to the tilt axis of the unit arranged, but in contrast offset laterally, so that the top view Connection line between the centers of the vessels and the tilting direction of the unit encloses an acute angle.
  • This angle is preferably approximately 45 °.
  • the channel between the two vessels should be arranged so that in the Top view from the melting vessel, one in the tilt direction through the center of the melting vessel is still drawn within the inlet opening of the channel Treatment vessel is. This point of the circumference of the vessel is the deepest and when tilted thereby enables better emptying of the at a given tilt angle Melting vessel.
  • the unit is preferably not only in its starting position in the one described so far positive tilt direction in which the melt from the melting vessel into the Treatment vessel is transferable, but also in the reverse, negative tilt direction, to allow the vessels to be detached.
  • the sole of the connecting channel between The melting vessel and treatment vessel are so high that the two vessels operate in parallel can be without melt from the melting vessel into the treatment vessel overflows.
  • the sole of the connecting channel should be opposite the bottom of the melting vessel by an amount higher than that in the starting position of the aggregate Retain the melt in the furnace of the melting vessel by at least half Capacity of the treatment vessel, preferably the entire capacity of the treatment vessel allows.
  • the bottom of the vessel of the aftertreatment vessel is lower than the bottom of the melting vessel, in order to Tilt the entire melt from the melting vessel into the treatment vessel can.
  • the melting pot have a larger diameter than the treatment vessel.
  • connection channel between the two vessels as a channel open at the top in a fire-resistant material existing partition between the two vessels.
  • the hot exhaust gases from the treatment vessel and the melting vessel are useful used to preheat the feed material to be charged into the melting vessel.
  • This can be done in a particularly compact and efficient manner in that the Lid of the melting vessel is fastened in a holding structure, which is also a trained as Chargiergutvorierr shaft whose lower opening in the Interior of the melting vessel opens.
  • the over the connecting channel in particular if this is designed as a channel open at the top, from the treatment vessel into the Hot exhaust gases entering the melting vessel, and the hot exhaust gases of the melting vessel are then replaced by a scrap column that forms in the area below and in the shaft drained upwards through the shaft and preheat the cargo.
  • the shaft can also have locking members that come from a closed position for holding cargo in the interior of the shaft in a release position are movable in which they allow the passage through the shaft.
  • the cargo can be retained in the shaft and the heat utilization improve even further.
  • the metallurgical aggregate contains for melting metal feed and for post-treatment of the metal melt a melting vessel 1 and one connected to it to form a structural unit Treatment vessel 2, which is attached to the side of the melting vessel 1.
  • the two Vessels are fastened in a frame 3 which is tiltably mounted.
  • the frame has an oven cradle 5 which can be rolled on a roller track 4, and a hydraulic actuator 6 engaging on the frame, with which the unit around a horizontal tilt axis 7 from the starting position shown in Figures 2 and 4 both in a positive tilt direction 8 and in a negative tilt direction 9 is tiltable by a predetermined tilt angle.
  • the melting vessel 1 has a charging opening 10 for introduction of the feed material, which is formed in the vessel lid 11 and contains one Oven range 12 for receiving molten metal 13.
  • the oven range 12 is usually 12 made of refractory material, while the upper vessel placed on the stove 14 and the lid 11 consist of water-cooled elements.
  • Drain opening 15 for removing the molten metal and this one opposite Working opening 16 is provided for removing slag from the melting vessel 1.
  • the drain opening 15 is located with respect to the center of the vessel 17 in the positive tilt direction 8, while the working opening 16 in the negative Tilting direction 9 is such that the metal melt 13 when tilting in the positive direction 8 discharged from the oven range 12 and 9 slag by tilting in the negative direction the working opening 16 can be removed.
  • the treatment vessel 2 attached to the side of the melting vessel 1 for receiving the Molten metal 13 from the furnace 12 is lined with refractory material and forms, as the figures clearly show, a constructive unity with the Smelting vessel 1.
  • the treatment vessel is preferably sized so that that it is able to reach the maximum allowable volume of the molten metal of the melting vessel record, the cross section of the treatment vessel is significantly smaller than is that of the melting pot.
  • the treatment vessel takes on the function of a pan, has a tap hole 18 in the bottom and possibly gas purging stones or under bath nozzles for blowing in treatment gases and solids (not shown) and is covered with a water-cooled lid 19.
  • the tap opening 18 with respect to the center 20 of the treatment vessel 2 in positive tilt direction 8 is arranged in the opposite half of the treatment vessel a working opening 21 is provided, via which when the unit tilts 9 slag can be withdrawn from the treatment vessel in the negative tilt direction.
  • the treatment vessel 2 has an inlet opening 22 for the molten metal and is so attached adjacent to the melting vessel that in plan view (see FIG. 3) the connecting line 23 with respect to the center 17 of the melting vessel 1 one between the vessel centers 17 and 20 with respect to the positive tilt direction 8 includes an acute angle ⁇ , which in the case shown is approximately 45 °. This is it possible to move the vessel centers 17 and 20 closer together with respect to the tilting direction and thus to concentrate the masses to be moved.
  • the metallurgical aggregate is in the non-tilted state in its starting position, the bottom of the vessel 24 of the aftertreatment vessel 2 is called deeper than the vessel bottom 25 of the melting vessel 1, that is to say the furnace hearth 12.
  • the drain opening 15 of the melting vessel 1 is with the inlet opening 22 of the treatment vessel 2 connected by a connecting channel 26, which is designed as an upwardly open channel is.
  • the gutter is structurally formed in that the lining for the stove and the treatment vessel, the upper edges of which lie in the same plane, by a tangential section 27 is connected between the two vessels and adjacent to this tangential connecting portion 27 in the partition 28 between the two Vessels the upwardly open channel of the connecting channel 26 is formed.
  • the sole 29 of the connecting channel lies around one significant amount higher than the bottom 25 of the melting vessel 1. It should at least are so high that in the starting position of the unit shown in Figure 4 in the oven 12 of the melting vessel 1 at least half the capacity of Treatment vessel 2 can be retained.
  • the melting vessel 1 is for the supply of for melting the metallic feed required heat energy assigned a first heating device, the arc electrodes.
  • Induction coils, burners, gas purging stones, under bath nozzles, inflation and Afterburning nozzles or other known heating devices for heating and Melting the feed can include.
  • Figure 3 are representative of the first Heating device side wall burner 30 indicated and one in Figures 4 and 6 Passage opening 31 in the vessel lid 11 for the insertion of an arc electrode 40.
  • a second heating device is assigned to the treatment vessel.
  • the second heater may include the same energy sources as the first heater.
  • the heating devices known from ladle metallurgy are preferred.
  • Representative Arc electrodes 40 are shown in FIG. About floor washing stones (not shown) or nozzles 32 can gases and also pulverized solids in the melt be initiated for their treatment.
  • a lifting and swiveling device 33 for three Electrodes 40 arranged such that the electrodes are optionally in the melting vessel 1 and insertable into the treatment vessel 2 and there as the first or second heating device can be used.
  • the lifting and swiveling device 33 is, as in particular FIG. 3 can be seen attached to the tilting frame 3 of the unit, so that when tilting the The electrodes do not have to be removed from the relevant vessel.
  • the melting vessel 1 has one Charge preheater 34.
  • This is designed as a shaft and in the support structure 35 attached for the lid 11.
  • the basic structure of such Melting vessel with an integrated charge preheater is described in WO 90/10 086. Accordingly, a segment of the cover is replaced by a shaft over which the metallic insert material can be charged into the melting vessel.
  • the lower opening of the shaft is the inlet opening 10 of the melting vessel present in cover 11.
  • the charge material preheater 34 is displaceable to the side by a Cover 36 closed. Those that are passed through the charge preheater are called Furnace exhaust gases are drawn off via an upper outlet opening 38.
  • the charge material preheater has blocking members 37 in the form of fingers lying next to each other at a distance from one another in the 6 closed position shown in solid lines in a dashed line shown release position are pivotable downwards, in which they pass release through the shaft.
  • the feed material retained in the charge preheater and can be caused by the hot furnace gases are flowed through from below through the spaces between the blocking elements 37 enter the charge column and after giving off its heat through the outlet opening 38 are deducted.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Organic Chemistry (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

PCT No. PCT/EP95/05072 Sec. 371 Date Sep. 11, 1997 Sec. 102(e) Date Sep. 11, 1997 PCT Filed Dec. 21, 1995 PCT Pub. No. WO96/19592 PCT Pub. Date Jun. 27, 1996A metallurgical unit for smelting metal charge material and for post-treatment of the molten metal, which is tiltable from a starting position in a positive tilting direction (8) about a tilt axis (7), includes a melting vessel (1), with a furnace hearth (12) for receiving the molten metal (13), and a treatment vessel (2) disposed laterally on the melting vessel for metallurgical treatment of the molten metal. The molten metal (13) which flows away out of the melting vessel (1) upon tilting of the unit in the positive direction (8) can be transferred into the treatment vessel (2) by way of a passage (26) connecting the furnace hearth of the melting vessel (1) to the receiving chamber of the treatment vessel (2).

Description

Die Erfindung betrifft ein kippbares metallurgisches Aggregat zum Einschmelzen von metallischem Einsatzmaterial, insbesondere von eisenhaltigem Material, und zum Nachbehandeln der Metallschmelze.The invention relates to a tiltable metallurgical unit for melting metallic insert material, in particular iron-containing material, and for aftertreatment the molten metal.

Durch die EP-0 240 485-B1 ist eine Anlage zur Herstellung von Stahl aus Schrott und gegebenenfalls Zuschlagstoffen bekannt geworden, mit einem Schachtofenteil, der einen, einen flüssigen Sumpf aus Vorschmelze aufnehmenden Boden und seitlich in den unteren Teil seines Innenraumes mündende Beheizungseinrichtungen aufweist und mit einem mit dem Schachtofenteil integral zusammenhängenden Herdofenteil, in den die Vorschmelze aus dem Schachtofenteil überführbar ist. Der Herdofenteil schließt unmittelbar an den Unterteil des Schachtofenteiles an. Zwischen dem unteren Schachtofenteil und dem Herdofenteil ist ein Überlaufwehr vorgesehen, über die sich in der Mulde des Schachtofenteils angesammelte Vorschmelze kontinuierlich in den Herdofenteil abfließt, dessen Boden tiefer als der Boden des Schachtofenteiles angeordnet ist. Das gesamte, aus Schachtofenteil und Herdofenteil bestehende Aggregat ist kippbar und zwar senkrecht zu einer das Zentrum des Schachtofenteiles mit dem Zentrum des Herdofenteiles verbindenden horizontalen Achse. Durch das Kippen senkrecht zu dieser Achse können die zum Kippen erforderlichen Kräfte trotz der großen zu bewegenden Massen gering gehalten werden. Der Herdofenteil weist einen exzentrisch angeordneten Bodenabstich für den Stahl und in einer Seitenwand eine Arbeitstür für das Abziehen der Schlacke auf. Sowohl der Unterteil des Schachtofenteiles als auch der des Herdofenteiles weisen einen im Grundriß kreisförmigen Innenraum auf, wobei der Innenraum des Schachtofenteiles den Innenraum des Herdofenteiles im Grundriß etwa tangiert und der Übergang von einem Raum in den anderen verengt ausgebildet ist. Als Beheizungsvorrichtung des Herdofenteiles dient ein Lichtbogenaggregat während als Beheizungsvorrichtung für den Schachtofenteil eine Mehrzahl von Plasmabrennern dient, die im untern Bereich des Schachtofenteils längs des Umfangs verteilt angeordnet sind.EP-0 240 485-B1 describes a plant for the production of steel from scrap and If necessary, aggregates become known, with a shaft furnace part that a liquid sump from premelt-absorbing soil and laterally in the lower Has part of its interior opening heating devices and with a the shaft furnace part integrally connected hearth furnace part, in which the premelt can be transferred from the shaft furnace part. The stove section immediately adjoins the Lower part of the shaft furnace part. Between the lower part of the shaft furnace and the Hearth furnace part is provided with an overflow weir, over which lies in the trough of the shaft furnace part accumulated premelt flows continuously into the hearth part, the Bottom is arranged lower than the bottom of the shaft furnace part. The entire, made of shaft furnace part and stove part existing unit is tiltable and perpendicular to one that Center of the shaft furnace part with the horizontal connecting the center of the stove part Axis. By tilting perpendicular to this axis you can tilt required forces are kept low despite the large masses to be moved. The stove section has an eccentrically arranged bottom cut for the steel and a work door in a side wall for removing the slag. Both the The lower part of the shaft furnace part and that of the hearth furnace part have a floor plan circular interior, the interior of the shaft furnace part the interior of the hearth part in the floor plan and the transition from one room to the other another is narrowed. A serves as the heating device for the stove part Arc unit while as a heating device for the shaft furnace part one A plurality of plasma torches is used, which are located in the lower region of the shaft furnace part along the Are arranged circumferentially distributed.

Die Bodenvertiefung des Schachtofenteils ist relativ seicht ausgebildet und die Oberkannte des Überlaufwehres weist gegenüber der Bodenvertiefung eine geringe Höhe auf, so daß zu Beginn eines Schmelzvorgangs nur eine geringfügige Menge der Vorschmelze in der Bodenvertiefung des Schachtofenteiles zurückgehalten wird und nach der Sumpfbildung die Vorschmelze kontinuierlich über das Überlaufwehr in den Herdofenteil abfließt. Um im Bereich des Überlaufwehres ein Einfrieren der Schmelze zu verhindern, ist einerseits die Neigung der Plasmabrenner so eingestellt, daß die Vorschmelze in Richtung zum Überlaufwehr hin überhitzt wird und es ist andererseits noch ein Plasmabrenner zwischen dem Schachtofenteil und dem Herdofenteil vorgesehen, so daß die Vorschmelze im Bereich des Überlaufwehres überhitzt werden kann und der kontinuierliche Abfluß der Vorschmelze sichergestellt ist.The bottom recess of the shaft furnace part is relatively shallow and the upper edge the overflow weir has a small height compared to the bottom recess, so that at the beginning of a melting process, only a small amount of the premelt in the Bottom recess of the shaft furnace part is retained and after the sump formation Premelt flows continuously through the overflow weir into the stove section. To im The area of the overflow weir is to prevent the melt from freezing The inclination of the plasma torch is adjusted so that the premelt is directed towards the overflow weir is overheated and there is still a plasma torch between the The shaft furnace part and the stove part are provided so that the premelt in the area of Overflow weir can be overheated and the continuous flow of the premelt is ensured.

Die metallurgische Behandlung im Herdofenteil beginnt sobald hier die halbe Badtiefe erreicht ist. Durch zusätzliche Zufuhr von elektrischer Energie wird die Schmelze bis zur Abstichtemperatur erhitzt. Während dieses Prozesses fließt kontinuierlich Vorschmelze aus dem Schachtofenteil zu. Wenn im Herdofenteil das Abstichgewicht erreicht ist, wird durch Kippen des Aggregates über eine exzentrische Bodenabstichöffnung schlackefrei abgestochen.The metallurgical treatment in the hearth section begins as soon as half the bath depth is reached. By additional supply of electrical energy, the melt is Tapping temperature heated. Premelt flows continuously during this process the shaft furnace part. When the tapping weight in the hearth part is reached, by Tilting of the unit tapped without slag using an eccentric bottom tap opening.

Bei der bekannten Anlage ist im Bereich des Überlaufwehres zusätzliche Wärmeenergie zuzuführen um ein Einfrieren der Vorschmelze in diesem Bereich zu verhindern. Außerdem wird während der Behandlung der Vorschmelze im Herdofenteil kontinuierlich Vorschmelze zugeführt, die in ihrer Zusammensetzung und in ihrer Temperatur starken Schwankungen unterworfen ist, so daß hierdurch der Behandlungsvorgang im Herdofen beeinträchtigt wird. Das Fertigmachen der Schmelze (Desoxidieren, weitere Entschwefelung und Legieren) soll deshalb außerhalb des Herdofenteils, beispielsweise während des Abstiches in eine Pfanne erfolgen. In the known system there is additional thermal energy in the area of the overflow weir to prevent freezing of the premelt in this area. Furthermore becomes continuous during the treatment of the premelt in the hearth section Premelt supplied, which are strong in their composition and in their temperature Is subject to fluctuations, so that thereby the treatment process in the hearth is affected. Finishing the melt (deoxidizing, further desulfurization and alloying) should therefore outside of the hearth part, for example during the Tapping into a pan.

Die durch die EP-0 548 042-A2 bekannt gewordene Anlage unterscheidet sich von der Anlage gemäß der EP-0 240 485-B1 im wesentlichen dadurch, daß als Heizeinrichtung für ein den Schachtofen bildendes Ofengefäß, das mit einem Elektroherdofen verbunden ist, an Stelle der Plasmabrenner Graphitelektroden eingesetzt werden, die in nach außen vorspringende Erweiterungen des Schachtofenunterteils einschiebbar sind.The system which has become known from EP-0 548 042-A2 differs from that System according to EP-0 240 485-B1 essentially in that as a heating device for a furnace vessel forming the shaft furnace, which is connected to an electric stove is, instead of the plasma torch graphite electrodes used in projecting extensions of the lower part of the shaft furnace can be inserted.

Durch die DE-25 04 911-A1 ist eine Vorrichtung zum Einschmelzen von Schrott, Eisenschwamm oder dergleichen in einem Schachtofen mittels einer Brennstoff-SauerstoffFlamme von unten und einem Auslauf für das aufgeschmolzene Material im Boden des Schachtofens zur kontinuierlichen Stahlerzeugung bekannt geworden, bei der mit dem Schachtofen ein seitlich zu diesem angebrachtes Erhitzungsgefäß integriert ist. Der Schachtofen weist an der tiefsten Stelle seines Bodens einen Auslauf für geschmolzenes Metall auf, der über einen Kanal mit dem Überhitzungsgefäß verbunden ist und ferner in der Seitenwand einen Schlackenablauf. Das Uberhitzungsgefäß ist mit einem Überlauf versehen, der sich geringfügig unterhalb der Höhe des Schlackenauslaufs befindet. Das im Überhitzungsgefäß überhitzte flüssige Metall fließt kontinuierlich über den Überlauf ab und wird über den Verbindungskanal zum Schachtofen durch das in diesem erschmolzene flüssige Metall kontinuierlich ersetzt. Das Uberhitzungsgefäß wird mittels Lichtbogen beheizt. Das Aggregat ist nicht kippbar.DE-25 04 911-A1 is a device for melting scrap, sponge iron or the like in a shaft furnace by means of a fuel-oxygen flame from below and an outlet for the melted material in the bottom of the Shaft furnace for continuous steelmaking has become known, with the Shaft furnace, a heating vessel attached to this side is integrated. Of the The shaft furnace has an outlet for molten material at the deepest point of its floor Metal, which is connected to the superheating vessel via a channel and also in a slag drain on the side wall. The overheating vessel has an overflow, which is slightly below the height of the slag outlet. That in Overheating vessel overheated liquid metal continuously flows over the overflow and is via the connecting channel to the shaft furnace through the melted in it liquid metal continuously replaced. The superheating vessel is arced heated. The unit cannot be tilted.

Die US-A-4 552 343 beschreibt einen kippbaren Lichtbogenofen mit einer geschlossenen, an das Gefäß angebauten Ausgußrinne zum schlackenfreien Abstich. In der Ausgußrinne erfolgt weder eine Behandlung noch eine weitere Erhitzung der Schmelze.US-A-4 552 343 describes a tiltable arc furnace with a closed, pouring spout attached to the vessel for slag-free tapping. In the pouring spout there is no treatment or further heating of the melt.

Die japanische Offenlegungsschrift JP-2-290 912 A beschreibt ein kippbares, metallurgisches Aggregat, das eine erste und eine zweite Ofenkammer enthält, die durch ein Wehr getrennt sind. Den Ofenkammern sind eigene Heizeinrichtungen zugeordnet. In der ersten Ofenkammer wird das Einsatzmaterial geschmolzen und in der zweiten Ofenkammer die Schmelze behandelt. Damit der Stahl der zweiten Kammer, der gerade behandelt wird, nicht mit dem Stahl der ersten Kammer, der gerade geschmolzen wird, vermischt werden kann, wird nach dem Abstechen des Stahls der zweiten Kammer durch Kippen des Gefäßes der in der ersten Kammer geschmolzene und durch das Wehr zurückgehaltene Stahl in die zweite Kammer übergeführt, um dort weiterbehandelt zu werden, während nach dem Zurückkippen des Gefäßes gleichzeitig in der ersten Kammer neuer Stahl erschmolzen wird.Japanese laid-open patent publication JP-2-290 912 A describes a tiltable, metallurgical Unit that contains a first and a second furnace chamber by a weir are separated. Separate heating devices are assigned to the furnace chambers. In the first The feedstock is melted and the in the second furnace chamber Melt treated. So that the steel of the second chamber that is being treated not be mixed with the steel of the first chamber that is being melted can, after tapping the steel of the second chamber by tilting the vessel the steel melted in the first chamber and held back by the weir into the transferred to the second chamber for further treatment, while after the Tilting back the vessel melted new steel at the same time in the first chamber becomes.

Bei dem bekannten metallurgischen Aggregat liegt die zweite Kammer in Kipprichtung hinter der ersten Kammer, d. h. fluchtend zur Kipprichtung. Dies führt zu einem Gesamtgefäß, das in dieser Richtung große Abmessungen hat. Damit sind für den Kippvorgang große Kräfte erforderlich.In the known metallurgical unit, the second chamber lies in the tilting direction behind the first chamber, d. H. aligned to the direction of tilt. This leads to an overall vessel, which has large dimensions in this direction. So that are for the tipping process great forces required.

Der Erfindung liegt die Aufgabe zugrunde, ein metallurgisches Aggregat der zuletzt beschriebenen Art kompakt zu gestalten und bei einem solchen Aggregat die beim Kippen zu bewegenden Massen möglichst niedrig zu halten. Schmelzgefäß und Behandlungsgefäß sollen voneinander unabhängig im Hinblick auf ihre Zielsetzung optimal ausgebildet und betrieben werden können. Es soll der Energieverbrauch des Aggregats pro Tonne hergestellten Metalls minimiert werden und es sollen die heißen Abgase des Behandlungsgefäßes, wie auch des Schmelzgefäßes zur Vorerhitzung des Einsatzmateriales ausnutzbar sein.The invention has for its object a metallurgical unit of the last to make the type described compact and in such an aggregate when tilting to keep moving masses as low as possible. Melting vessel and treatment vessel should be optimally trained independently of each other with regard to their objectives and can be operated. The energy consumption of the unit per ton should be produced Metal are minimized and the hot exhaust gases from the treatment vessel, and the melting vessel can be used for preheating the feed material be.

Die Erfindung ist durch die Merkmale des Anspruches 1 gekennzeichnet. Vorteilhafte Ausgestaltungen der Erfindung sind den übrigen Ansprüchen zu entnehmen.The invention is characterized by the features of claim 1. Beneficial Embodiments of the invention can be found in the remaining claims.

Bei dem erfindungsgemäßen Aggregat sind ein Schmelzgefäß, das einen Ofenherd zur Aufnahme eines wesentlichen Teils, vorzugsweise der gesamten Menge einer Ofencharge enthält und ein seitlich am Schmelzgefäß angebrachtes Behandlungsgefäß zur Aufnahme der Metallschmelze aus dem Ofenherd des Schmelzgefäßes und zur metallurgischen Behandlung der Schmelze zu einem Aggregat verbunden, das um eine Kippachse kippbar oder längs einer Wälzbahn abwälzbar ist. Über einen Kanal zwischen dem Schmelzgefäß und dem Behandlungsgefäß, der in einer solchen Höhe angeordnet ist, daß die gewünschte Menge an Metallschmelze im Schmelzgefäß zurückgehalten werden kann, ist diese beim Kippen des Aggregats in das Behandlungsgefäß überführbar. Das Überführen der Metallschmelze geschieht also nicht kontinuierlich über ein Überlaufwehr, sondern schubweise nur dann, wenn sich im Schmelzgefäß die gewünschte Menge an Metallschmelze angesammelt hat. Die heiße Metallschmelze durchströmt beim Kippen des Aggregats den Kanal zum Behandlungsgefäß in kurzer Zeit, so daß hier nicht die Gefahr eines Abkühlens besteht. Während des Einschmelzens von festem Einsatzmaterial im Schmelzgefäß wird die beim vorherigen Kippvorgang in das Behandlungsgefäß übergeführte Metallschmelze metallurgisch behandelt, so daß beide Prozesse parallel zueinander ablaufen, wobei das Schmelzgefäß in seiner Größe und Ausstattung im Hinblick auf den Schmelzprozeß optimiert werden kann und das Behandlungsgefäß im Hinblick auf die metallurgische Behandlung. Die Wärmezufuhr zu den beiden Gefäßen, die durch Verbrennen fossiler Brennstoffe, Zufuhr von sauerstoffhaltigen Gasen und gegebenenfalls Kohle durch Bodensteine oder Unterbaddüsen und durch elektrische Energie erfolgen kann, sollte so abgestimmt sein, daß die Einschmelzeit etwa der Behandlungszeit entspricht, so daß nach dem Abstechen des Behandlungsgefäßes die im Schmelzgefäß gebildete Metallschmelze durch Kippen des Aggregats in das Behandlungsgefäß überführbar und unmittelbar danach die parallele Betriebsweise der beiden Gefäße fortgesetzt werden kann. Da während des Einschmelzprozesses die im Schmelzgefäß gebildete Schmelze nicht in das Behandlungsgefäß überläuft, sondern der Vorgang der Überführung der Schmelze durch das Kippen des Aggregats gesteuert wird, wird die metallurgische Behandlung im Behandlungsgefäß nicht durch zufließende Schmelze gestört.In the unit according to the invention are a melting vessel that a stove for Inclusion of a substantial part, preferably the entire amount of a furnace batch contains and a treatment vessel attached to the side of the melting vessel for receiving the molten metal from the furnace of the melting vessel and to the metallurgical Treatment of the melt combined into an aggregate that can be tilted about a tilt axis or can be passed along a roller track. Via a channel between the melting vessel and the treatment vessel, which is arranged at a height such that the desired Amount of molten metal can be retained in the melting vessel, this is at Tilting the unit into the treatment vessel can be transferred. Transferring the molten metal does not happen continuously over an overflow weir, but in batches only when the desired amount of molten metal has accumulated in the melting vessel Has. The hot molten metal flows through the channel when the unit tips over to the treatment vessel in a short time, so that there is no risk of cooling down here consists. During the melting of solid feed material in the melting vessel, the Metal melt transferred into the treatment vessel during the previous tilting process treated metallurgically, so that both processes run parallel to each other, the Melting vessel in its size and equipment with regard to the melting process can be optimized and the treatment vessel with regard to the metallurgical Treatment. Heat is supplied to the two vessels by burning fossil fuels Fuels, supply of oxygen-containing gases and possibly coal through soil stones or under-bath jets and can be done by electrical energy should be tuned in this way be that the melting time corresponds approximately to the treatment time, so that after the Tapping the treatment vessel through the metal melt formed in the melting vessel Tilting the unit into the treatment vessel and immediately after that parallel operation of the two vessels can be continued. Since during the Melting process, the melt formed in the melting vessel does not enter the treatment vessel overflows, but the process of transferring the melt by tilting the Is controlled aggregate, the metallurgical treatment in the treatment vessel is not disrupted by inflowing melt.

Das Behandlungsgefäß ist nicht fluchtend zum Schmelzgefäß in der Kipprichtung bzw. in einer Senkrechten zur Kippachse des Aggregates angeordnet, sondern demgegenüber seitlich versetzt, so daß in der Draufsicht die Verbindungslinie zwischen den Gefäßmittelpunkten und der Kipprichtung des Aggregates einen spitzen Winkel einschließt. Vorzugsweise liegt dieser Winkel bei etwa 45°. Der Kanal zwischen den beiden Gefäßen sollte allerdings so angeordnet werden, daß in der Draufsicht vom Schmelzgefäß aus betrachtet, eine in Kipprichtung durch den Mittelpunkt des Schmelzgefäßes gezogene Linie noch innerhalb der Eintrittsöffnung des Kanals zum Behandlungsgefäß liegt. Diese Stelle des Gefäßumfangs liegt beim Kippen am tiefsten und ermöglicht dadurch bei einem vorgegebenen Kippwinkel eine bessere Entleerung des Schmelzgefäßes.The treatment vessel is not aligned with the melting vessel in the tilting direction or in a perpendicular to the tilt axis of the unit arranged, but in contrast offset laterally, so that the top view Connection line between the centers of the vessels and the tilting direction of the unit encloses an acute angle. This angle is preferably approximately 45 °. Of the However, the channel between the two vessels should be arranged so that in the Top view from the melting vessel, one in the tilt direction through the center of the melting vessel is still drawn within the inlet opening of the channel Treatment vessel is. This point of the circumference of the vessel is the deepest and when tilted thereby enables better emptying of the at a given tilt angle Melting vessel.

Vorzugsweise ist das Aggregat aus seiner Ausgangsposition nicht nur in die bisher beschriebene positive Kipprichtung kippbar, in der die Schmelze vom Schmelzgefäß in das Behandlungsgefäß überführbar ist, sondern auch in umgekehrter, negativer Kipprichtung, um ein Abschlacken der Gefäße zu ermöglichen. An geeigneter Stelle sind hierzu Arbeitsöffnungen bzw. Schlackenöffnungen vorzusehen.The unit is preferably not only in its starting position in the one described so far positive tilt direction in which the melt from the melting vessel into the Treatment vessel is transferable, but also in the reverse, negative tilt direction, to allow the vessels to be detached. There are work openings at a suitable point or to provide slag openings.

Wie bereits erwähnt, ist es vorteilhaft, wenn die Sohle des Verbindungskanals zwischen Schmelzgefäß und Behandlungsgefäß so hoch liegt, daß die beiden Gefäße parallel betrieben werden können, ohne daß Schmelze vom Schmelzgefäß in das Behandlungsgefäß überfließt. Die Sohle des Verbindungskanals soll gegenüber dem Gefäßboden des Schmelzgefäßes um einen Betrag höher liegen, der in der Ausgangsposition des Aggregats ein Zurückhalten der Schmelze im Ofenherd des Schmelzgefäßes von wenigstens dem halben Fassungsvermögen des Behandlungsgefäßes, vorzugsweise dem ganzen Fassungsvermögen des Behandlungsgefäßes ermöglicht.As already mentioned, it is advantageous if the sole of the connecting channel between The melting vessel and treatment vessel are so high that the two vessels operate in parallel can be without melt from the melting vessel into the treatment vessel overflows. The sole of the connecting channel should be opposite the bottom of the melting vessel by an amount higher than that in the starting position of the aggregate Retain the melt in the furnace of the melting vessel by at least half Capacity of the treatment vessel, preferably the entire capacity of the treatment vessel allows.

Außerdem ist es vorteilhaft, wenn in der Ausgangsposition des Aggregats der Gefäßboden des Nachbehandlungsgefäßes tiefer liegt als der Gefäßboden des Schmelzgefäßes, um beim Kippen die gesamte Schmelze vom Schmelzgefäß in das Behandlungsgefäß überführen zu können. Im Hinblick auf die bestimmungsgemäßen Arbeitsvorgänge wird das Schmelzgefäß einen größeren Durchmesser als das Behandlungsgefäß aufweisen. It is also advantageous if, in the starting position of the unit, the bottom of the vessel of the aftertreatment vessel is lower than the bottom of the melting vessel, in order to Tilt the entire melt from the melting vessel into the treatment vessel can. With regard to the intended operations, the melting pot have a larger diameter than the treatment vessel.

Um einen guten Zugang von oben zu ermöglichen, sollte der Verbindungskanal zwischen den beiden Gefäßen als nach oben hin offene Rinne in einer aus feuerfestem Material bestehenden Trennwand zwischen den beiden Gefäßen ausgebildet sein.In order to allow good access from above, the connection channel between the two vessels as a channel open at the top in a fire-resistant material existing partition between the two vessels.

Wie bereits erwähnt, können als Wärmequellen für die beiden Gefäße unterschiedliche Energieträger eingesetzt werden. Vorzugsweise wird neben anderen Energiequellen auch Lichtbogenenergie eingesetzt, wobei es vorteilhaft ist, wenn das Elektrodentragwerk auf demselben Kipprahmen angeordnet ist wie die beiden Gefäße, so daß zumindest beim Kippen in negativer Kipprichtung, das heißt beim Abschlacken, die Elektroden nicht aus den Gefäßen entfernt werden müssen. Vorzugsweise ist neben der konstruktiven Einheit aus Schmelzgefäß und Behandlungsgefäß eine Hub- und Schwenkvorrichtung für wenigstens eine Elektrode angeordnet, die wahlweise in das Schmelzgefäß und das Behandlungsgefäß einführbar ist.As already mentioned, different heat sources can be used for the two vessels Energy sources are used. In addition to other energy sources, it is also preferred Arc energy used, it being advantageous if the electrode structure on the same tipping frame is arranged as the two vessels, so that at least when Tilting in the negative tilt direction, i.e. when slagging, the electrodes do not stick out the vessels must be removed. In addition to the constructive unit a lifting and swiveling device for at least a melting vessel and treatment vessel an electrode is arranged, optionally in the melting vessel and the treatment vessel can be introduced.

Zweckmäßig werden die heißen Abgase des Behandlungsgefäßes und des Schmelzgefäßes zur Vorwärmung des in das Schmelzgefäß zu chargierenden Einsatzmaterials ausgenutzt. In besonders kompakter und effizienter Weise kann dies dadurch geschehen, daß der Deckel des Schmelzgefäßes in einer Haltekonstruktion befestigt wird, die zugleich einen als Chargiergutvorwärmer ausgebildeten Schacht trägt, dessen untere Öffnung in den Innenraum des Schmelzgefäßes mündet. Die über den Verbindungskanal, insbesondere wenn dieser als oben offene Rinne ausgebildet ist, aus dem Behandlungsgefäß in das Schmelzgefäß eintretenden heißen Abgase, und die heißen Abgase des Schmelzgefäßes werden dann durch eine Schrottsäule, die sich im Bereich unterhalb und im Schacht bildet, durch den Schacht nach oben abgeleitet und wärmen so das Chargiergut vor. In an sich bekannter Weise kann der Schacht auch Sperrorgane aufweisen, die aus einer Schließstellung zum Festhalten von Chargiergut im Innenraum des Schachtes in eine Freigabestellung bewegbar sind, in der sie den Durchtritt durch den Schacht freigeben. Bei einem solchen Schacht läßt sich das Chargiergut im Schacht zurückhalten und die Wärmeausnutzung noch weiter verbessern. The hot exhaust gases from the treatment vessel and the melting vessel are useful used to preheat the feed material to be charged into the melting vessel. This can be done in a particularly compact and efficient manner in that the Lid of the melting vessel is fastened in a holding structure, which is also a trained as Chargiergutvorwärmer shaft whose lower opening in the Interior of the melting vessel opens. The over the connecting channel, in particular if this is designed as a channel open at the top, from the treatment vessel into the Hot exhaust gases entering the melting vessel, and the hot exhaust gases of the melting vessel are then replaced by a scrap column that forms in the area below and in the shaft drained upwards through the shaft and preheat the cargo. In itself In a known manner, the shaft can also have locking members that come from a closed position for holding cargo in the interior of the shaft in a release position are movable in which they allow the passage through the shaft. At a such a shaft, the cargo can be retained in the shaft and the heat utilization improve even further.

Die Erfindung wird durch ein Ausführungsbeispiel anhand von sechs Figuren, die den Gegenstand schematisch in verschiedenen Ansichten darstellen, näher erläutert. Es zeigen

Fig. 1
eine Draufsicht auf das metallurgische Aggregat gemäß dieser Erfindung,
Fig. 2
den Schnitt II-II von Figur 1
Fig. 3
den Schnitt III-III von Figur 2
Fig. 4
den Schnitt IV-IV von Figur 1
Fig. 5
den Schnitt V-V von Figur 1 und
Fig. 6
den Schnitt VI-VI von Figur 1.
The invention is explained in more detail by means of an exemplary embodiment with reference to six figures which schematically illustrate the subject in different views. Show it
Fig. 1
2 shows a plan view of the metallurgical unit according to this invention,
Fig. 2
the section II-II of Figure 1
Fig. 3
the section III-III of Figure 2
Fig. 4
the section IV-IV of Figure 1
Fig. 5
the section VV of Figure 1 and
Fig. 6
the section VI-VI of Figure 1.

Wie aus den Figuren 1, 2 und 4 zu entnehmen ist, enthält das metallurgische Aggregat zum Einschmelzen von metallischem Einsatzmaterial und zum Nachbehandeln der Metallschmelze ein Schmelzgefäß 1 und ein mit diesem zu einer konstruktiven Einheit verbundenes Behandlungsgefäß 2, das seitlich am Schmelzgefäß 1 angebracht ist. Die beiden Gefäße sind in einem Rahmen 3 befestigt, der kippbar gelagert ist. Zu diesem Zweck weist im vorliegenden Fall der Rahmen eine auf einer Wälzbahn 4 abwälzbare Ofenwiege 5 auf, sowie ein am Rahmen angreifendes hydraulisches Stellglied 6, mit dem das Aggregat um eine horizontale Kippachse 7 aus der in den Figuren 2 und 4 dargestellten Ausgangsstellung sowohl in eine positive Kipprichtung 8 wie auch in eine negative Kipprichtung 9 um einen vorgegebenen Kippwinkel kippbar ist.As can be seen from FIGS. 1, 2 and 4, the metallurgical aggregate contains for melting metal feed and for post-treatment of the metal melt a melting vessel 1 and one connected to it to form a structural unit Treatment vessel 2, which is attached to the side of the melting vessel 1. The two Vessels are fastened in a frame 3 which is tiltably mounted. For this purpose points in the present case the frame has an oven cradle 5 which can be rolled on a roller track 4, and a hydraulic actuator 6 engaging on the frame, with which the unit around a horizontal tilt axis 7 from the starting position shown in Figures 2 and 4 both in a positive tilt direction 8 and in a negative tilt direction 9 is tiltable by a predetermined tilt angle.

Wie Figur 6 zeigt, ist das Schmelzgeäß 1 ist mit einer Chargieröffnung 10 zum Einbringen des Einsatzmaterials versehen, die im Gefäßdeckel 11 ausgebildet ist und enthält einen Ofenherd 12 zur Aufnahme von Metallschmelze 13. In üblicherweise ist der Ofenherd 12 aus feuerfestem Material gebildet, während das auf den Ofenherd aufgesetzte Obergefäß 14 und der Deckel 11 aus wassergekühlten Elementen bestehen.As FIG. 6 shows, the melting vessel 1 has a charging opening 10 for introduction of the feed material, which is formed in the vessel lid 11 and contains one Oven range 12 for receiving molten metal 13. The oven range 12 is usually 12 made of refractory material, while the upper vessel placed on the stove 14 and the lid 11 consist of water-cooled elements.

Wie Figur 3 am besten erkennen läßt, sind in der Seitenwand des Ofenherdes 12 eine Abflußöffnung 15 zur Entnahme der Metallschmelze und dieser gegenüberliegend eine Arbeitsöffnung 16 zum Entfernen von Schlacke aus dem Schmelzgefäß 1 vorgesehen. In der Draufsicht gemäß Figur 3 liegt die Abflußöffnung 15 bezüglich des Gefäßmittelpunktes 17 in positiver Kipprichtung 8, während die Arbeitsöffnung 16 in negativer Kipprichtung 9 liegt, so daß beim Kippen in positiver Richtung 8 die Metallschmelze 13 aus dem Ofenherd 12 abgeführt und beim Kippen in negativer Richtung 9 Schlacke durch die Arbeitsöffnung 16 entfernt werden kann.As can best be seen in FIG. 3, there are one in the side wall of the oven range 12 Drain opening 15 for removing the molten metal and this one opposite Working opening 16 is provided for removing slag from the melting vessel 1. In 3, the drain opening 15 is located with respect to the center of the vessel 17 in the positive tilt direction 8, while the working opening 16 in the negative Tilting direction 9 is such that the metal melt 13 when tilting in the positive direction 8 discharged from the oven range 12 and 9 slag by tilting in the negative direction the working opening 16 can be removed.

Das seitlich am Schmelzgefäß 1 angebrachte Behandlungsgefäß 2 zur Aufnahme der Metallschmelze 13 aus dem Ofenherd 12 ist mit feuerfestem Material ausgekleidet und bildet, wie die Figuren deutlich erkennen lassen, eine konstruktive Einheit mit dem Einschmelzgefäß 1. Das Behandlungsgefäß ist vorzugsweise in der Größe so bemessen, daß es in der Lage ist, das maximal zulässige Volumen der Metallschmelze des Schmelzgefäßes aufzunehmen, wobei der Querschnitt des Behandlungsgefäßes wesentlich kleiner als der des Schmelzgefäßes ist. Das Behandlungsgefäß übernimmt die Aufgabe einer Pfanne, besitzt im Boden eine Abstichöffnung 18 und gegebenenfalls Gasspülsteine bzw. Unterbaddüsen zum Einblasen von Behandlungsgasen und Feststoffen (nicht dargestellt) und ist mit einem wassergekühlten Deckel 19 abgedeckt. Während in der Draufsicht gemäß Figur 3 die Abstichöffnung 18 bezüglich des Mittelpunktes 20 des Behandlungsgefäßes 2 in positiver Kipprichtung 8 angeordnet ist, ist in der gegenüberliegenden Hälfte des Behandlungsgefäßes eine Arbeitsöffnung 21 vorgesehen, über die bei einem Kippen des Aggregats in negativer Kipprichtung 9 Schlacke aus dem Behandlungsgefäß abgezogen werden kann. Das Behandlungsgefäß 2 weist eine Eintrittsöffnung 22 für die Metallschmelze auf und ist derart angrenzend neben dem Schmelzgefäß angebracht, daß in der Draufsicht (siehe Figur 3) bezüglich des Mittelpunktes 17 des Schmelzgefäßes 1 die Verbindungslinie 23 zwischen den Gefäßmittelpunkten 17 und 20 gegenüber der positiven Kipprichtung 8 einen spitzen Winkel α einschließt, der im dargestellten Fall etwa 45° beträgt. Hierdurch ist es möglich, bezüglich der Kipprichtung die Gefäßmittelpunkte 17 und 20 näher zusammenzurücken und damit der zu bewegenden Massen zu konzentrieren.The treatment vessel 2 attached to the side of the melting vessel 1 for receiving the Molten metal 13 from the furnace 12 is lined with refractory material and forms, as the figures clearly show, a constructive unity with the Smelting vessel 1. The treatment vessel is preferably sized so that that it is able to reach the maximum allowable volume of the molten metal of the melting vessel record, the cross section of the treatment vessel is significantly smaller than is that of the melting pot. The treatment vessel takes on the function of a pan, has a tap hole 18 in the bottom and possibly gas purging stones or under bath nozzles for blowing in treatment gases and solids (not shown) and is covered with a water-cooled lid 19. While in the plan view according to figure 3 the tap opening 18 with respect to the center 20 of the treatment vessel 2 in positive tilt direction 8 is arranged in the opposite half of the treatment vessel a working opening 21 is provided, via which when the unit tilts 9 slag can be withdrawn from the treatment vessel in the negative tilt direction. The treatment vessel 2 has an inlet opening 22 for the molten metal and is so attached adjacent to the melting vessel that in plan view (see FIG. 3) the connecting line 23 with respect to the center 17 of the melting vessel 1 one between the vessel centers 17 and 20 with respect to the positive tilt direction 8 includes an acute angle α, which in the case shown is approximately 45 °. This is it possible to move the vessel centers 17 and 20 closer together with respect to the tilting direction and thus to concentrate the masses to be moved.

Wie Figur 4 zeigt, liegt im nicht gekippten Zustand des metallurgischen Aggregates, das heißt in dessen Ausgangsposition, der Gefäßboden 24 des Nachbehandlungsgefäßes 2 tiefer als der Gefäßboden 25 des Schmelzgefäßes 1, das heißt es Ofenherdes 12. Die Abflußöffnung 15 des Schmelzgefäßes 1 ist mit der Eintrittsöffnung 22 des Behandlungsgefäßes 2 durch einen Verbindungskanal 26 verbunden, der als nach oben offene Rinne ausgebildet ist. Konstruktiv ist die Rinne dadurch gebildet, daß die Ausmauerung für den Ofenherd und des Behandlungsgefäßes, deren Oberkanten in der gleichen Ebene liegen, durch einen tangentialen Abschnitt 27 zwischen den beiden Gefäßen verbunden ist und angrenzend an diesen tangentialen Verbindungsabschnitt 27 in der Trennwand 28 zwischen den beiden Gefäßen die nach oben offene Rinne des Verbindungskanals 26 ausgebildet wird.As FIG. 4 shows, the metallurgical aggregate is in the non-tilted state in its starting position, the bottom of the vessel 24 of the aftertreatment vessel 2 is called deeper than the vessel bottom 25 of the melting vessel 1, that is to say the furnace hearth 12. The drain opening 15 of the melting vessel 1 is with the inlet opening 22 of the treatment vessel 2 connected by a connecting channel 26, which is designed as an upwardly open channel is. The gutter is structurally formed in that the lining for the stove and the treatment vessel, the upper edges of which lie in the same plane, by a tangential section 27 is connected between the two vessels and adjacent to this tangential connecting portion 27 in the partition 28 between the two Vessels the upwardly open channel of the connecting channel 26 is formed.

Die Sohle 29 des Verbindungskanals liegt, wie insbesondere Figur 4 zeigt, um einen bedeutenden Betrag höher als der Gefäßboden 25 des Schmelzgefäßes 1. Sie soll mindestens so hoch liegen, daß in der in Figur 4 dargestellten Ausgangsposition des Aggregats im Ofenherd 12 des Schmelzgefäßes 1 wenigstens das halbe Fassungsvermögen des Behandlungsgefäßes 2 zurückgehalten werden kann.The sole 29 of the connecting channel, as shown in particular in FIG. 4, lies around one significant amount higher than the bottom 25 of the melting vessel 1. It should at least are so high that in the starting position of the unit shown in Figure 4 in the oven 12 of the melting vessel 1 at least half the capacity of Treatment vessel 2 can be retained.

Dem Schmelzgefäß 1 ist für die Zufuhr der zum Einschmelzen des metallischen Einsatzmaterials erforderlichen Wärmeenergie eine erste Heizeinrichtung zugeordnet, die Lichtbogenelektroden. Induktionsspulen, Brenner, Gasspülsteine, Unterbaddüsen, Aufblas- und Nachverbrennungsdüsen oder andere bekannte Heizeinrichtungen zum Erhitzen und Schmelzen des Einsatzmaterials umfassen kann. In Figur 3 sind stellvertretend für die erste Heizeinrichtung Seitenwandbrenner 30 angedeutet und in den Figuren 4 und 6 eine Durchtrittsöffnung 31 im Gefäßdeckel 11 für das Einführen einer Lichtbogenelektrode 40. The melting vessel 1 is for the supply of for melting the metallic feed required heat energy assigned a first heating device, the arc electrodes. Induction coils, burners, gas purging stones, under bath nozzles, inflation and Afterburning nozzles or other known heating devices for heating and Melting the feed can include. In Figure 3 are representative of the first Heating device side wall burner 30 indicated and one in Figures 4 and 6 Passage opening 31 in the vessel lid 11 for the insertion of an arc electrode 40.

Dem Behandlungsgefäß ist eine zweite Heizeinrichtung zugeordnet. Die zweite Heizeinrichtung kann die gleichen Energiequellen wie die erste Heizeinrichtung umfassen. Bevorzugt sind die aus der Pfannenmetallurgie bekannten Heizeinrichtungen. Stellvertretend sind in Figur 2 Lichtbogenelektroden 40 dargestellt. Über Bodenspülsteine (nicht dargestellt) oder Düsen 32 können Gase und auch pulveriersierte Feststoffe in die Schmelze zu deren Behandlung eingeleitet werden.A second heating device is assigned to the treatment vessel. The second heater may include the same energy sources as the first heater. The heating devices known from ladle metallurgy are preferred. Representative Arc electrodes 40 are shown in FIG. About floor washing stones (not shown) or nozzles 32 can gases and also pulverized solids in the melt be initiated for their treatment.

Bei dem dargestellten Ausführungsbeispiel ist neben der konstruktiven Einheit aus Schmelzgefäß 1 und Behandlungsgefäß 2 eine Hub- und Schwenkvorrichtung 33 für drei Elektroden 40 derart angeordnet, daß die Elektroden wahlweise in das Schmelzgefäß 1 und in das Behandlungsgefäß 2 einführbar und dort als erste bzw. zweite Heizeinrichtung einsetzbar sind. Die Hub- und Schwenkvorrichtung 33 ist, wie insbesondere Figur 3 erkennen läßt, auf dem Kipprahmen 3 des Aggregats befestigt, so daß beim Kippen des Aggregats die Elektroden nicht aus dem betreffenden Gefäß entfernt werden müssen.In the illustrated embodiment, in addition to the structural unit Melting vessel 1 and treatment vessel 2, a lifting and swiveling device 33 for three Electrodes 40 arranged such that the electrodes are optionally in the melting vessel 1 and insertable into the treatment vessel 2 and there as the first or second heating device can be used. The lifting and swiveling device 33 is, as in particular FIG. 3 can be seen attached to the tilting frame 3 of the unit, so that when tilting the The electrodes do not have to be removed from the relevant vessel.

Wie am besten aus den Figuren 1 und 6 ersichtlich ist, weist das Schmelzgefäß 1 einen Chargiergutvorwärmer 34 auf. Dieser ist als Schacht ausgebildet und in der Haltekonstruktion 35 für den Deckel 11 befestigt. Der grundsätzliche Aufbau eines solchen Schmelzgefäßes mit integriertem Chargiergutvorwärmer ist in der WO 90/10 086 beschrieben. Demgemäß ist ein Segment des Deckels durch einen Schacht ersetzt, über den das metallische Einsatzmaterial in das Schmelzgefäß chargierbar ist. Die untere Offnung des Schachtes ist gleichzeitg die in Deckel 11 vorhandene Eintrittsöffnung 10 des Schmelzgefäßes. Der Chargiergutvorwärmer 34 ist oben durch einen zur Seite verschiebbaren Deckel 36 verschlossen. Die durch den Chargiergutvorwärmer hindurchgeleiteten heißen Ofenabgase werden über eine obere Austrittsöffnung 38 abgezogen.As can best be seen from FIGS. 1 and 6, the melting vessel 1 has one Charge preheater 34. This is designed as a shaft and in the support structure 35 attached for the lid 11. The basic structure of such Melting vessel with an integrated charge preheater is described in WO 90/10 086. Accordingly, a segment of the cover is replaced by a shaft over which the metallic insert material can be charged into the melting vessel. The lower opening of the shaft is the inlet opening 10 of the melting vessel present in cover 11. The charge material preheater 34 is displaceable to the side by a Cover 36 closed. Those that are passed through the charge preheater are called Furnace exhaust gases are drawn off via an upper outlet opening 38.

Bei der in Figur 6 dargestellten Ausführungsform weist der Chargiergutvorwärmer Sperrorgane 37 in Form von mit Abstand nebeneinanderliegenden Fingern auf, die von der in der Figur 6 mit ausgezogenen Linien dargestellten Schließstellung in eine gestrichelt dargestellte Freigabestellung nach unten verschwenkbar sind, in der sie den Durchtritt durch den Schacht freigeben. In der Schließstellung der Sperrorgane 37 wird das Einsatzmaterial im Chargiergutvorwärmer zurückgehalten und kann durch die heißen Ofengase durchströmt werden, die von unten durch die Zwischenräume zwischen den Sperrorganen 37 in die Chargiergutsäule eintreten und nach Abgabe ihrer Wärme über die Austrittsöffnung 38 abgezogen werden.In the embodiment shown in FIG. 6, the charge material preheater has blocking members 37 in the form of fingers lying next to each other at a distance from one another in the 6 closed position shown in solid lines in a dashed line shown release position are pivotable downwards, in which they pass release through the shaft. In the closed position of the locking members 37, the feed material retained in the charge preheater and can be caused by the hot furnace gases are flowed through from below through the spaces between the blocking elements 37 enter the charge column and after giving off its heat through the outlet opening 38 are deducted.

Im folgenden wird die Arbeitsweise des beschriebenen Aggregats erläutert.The operation of the unit described is explained below.

Unter der Annahme, daß im Behandlungsgefäß 2 eine Metallschmelze (Eisenschmelze) metallurgisch behandelt worden ist, während gleichzeitig im Schmelzgefäß 1 eine Menge an Einstzmaterial (Stahlschrott) eingeschmolzen worden ist, die dem Inhalt des Behandlungsgefäßes entspricht, ferner im Chargiergutvorwärmer 34 das durch die Sperrorgane 37 zurückgehaltene Einsatzmaterial erhitzt worden ist, laufen die folgenden Verfahrensschritte ab.

  • 1. Die fertig behandelte Metallschmelze wird über die Abstichöffnung 18 abgestochen und danach die Abstichöffnung wieder verschlossen.
  • 2. Durch Kippen des Aggregats in positiver Kipprichtung 8 wird die Metallschmelze aus dem Ofenherd 12 über den Verbindungskanal 26 in das Behandlungsgefäß übergeleitet und beim oder nach dem Zurückkippen in die Ausgangslage das vorerhitzte Einsatzmaterial in das Schmelzgefäß durch Verschwenken der Sperrorgane 37 in die Freigabestellung chargiert.
  • 3. Die Sperrorgane 37 werden in ihre Schließstellung zurückgeschwenkt, und es wird kaltes Einsatzmaterial über die durch den zur Seite gefahrenen Deckel 36 freigegebene obere Offnung chargiert und die Öffnung gleich wieder verschlossen.
  • 4. Die Elektroden 40 werden in das Behandlungsgefäß 2 eingefahren und der Behandlungsprozeß eingeleitet, wobei die heißen Ofenabgase über den Verbindungskanal 26 in das Schmelzgefäß 1 strömen, hier fühlbare Wärme an das Einsatzmaterial abgeben und dann zur weiteren Wärmeausnutzung durch die Chargiergutsäule im Chargiergutvorwärmer 34 geleitet werden. Gleichzeitig mit der Wärmezufuhr durch die zweite Heizeinrichtung in das Behandlungsgefäß - ein Teil der Wärme kann mittels Einblasen von Sauerstoff durch Unterbaddüsen, Spülsteine und Lanzen zugeführt werden - erfolgt die Wärmezufuhr durch die erste Heizeinrichtung, das heißt im vorliegenden Fall durch die Brenner 30, in das Schmelzgefäß, um das Material in diesem Gefäß einzuschmelzen. Auch die hierbei entstehenden heißen Ofengase werden durch das im Chargiergutvorwärmer zurückgehaltene Einsatzmaterial hindurchgeleitet.
  • 5. Nach ausreichender Wärmezufuhr durch die Elektroden 40 in das Behandlungsgefäß 2 werden die Elektroden durch die Elektrodenhub- und -schwenkvorrichtung aus dem Behandlungsgefäß gezogen, zur Seite geschwenkt und in das Schmelzgefäß 1 eingeführt, um dort die Brennerleistung zu unterstützen und den Einschmelzprozeß zu beschleunigen.
  • 6. Am Ende des Einschmelzprozesses, wenn der Badspiegel nahezu die Sohle 29 des Verbindungskanals erreicht hat und der Behandlungsprozeß im Behandlungsgefäß nahezu abgeschlossen ist, werden die Elektroden wieder zum Behandlungsgefäß zurückgeschwenkt und das Aggregat wird zum Abschlacken in die negative Kipprichtung gekippt. Danach wiederholen sich die beschriebenen Verfahrensschritte 1 bis 6.
    • Assuming that a molten metal (molten iron) has been treated metallurgically in the treatment vessel 2, while at the same time an amount of insert material (steel scrap) which corresponds to the content of the treatment vessel has been melted in the melting vessel 1, furthermore in the charge material preheater 34 that by the blocking members 37th retained feed has been heated, the following process steps proceed.
  • 1. The finished metal melt is tapped through the tap opening 18 and then the tap opening is closed again.
  • 2. By tilting the unit in the positive tilting direction 8, the molten metal is transferred from the oven 12 through the connecting channel 26 into the treatment vessel and the preheated feed material is charged into the release position by pivoting the locking members 37 when or after tipping back into the starting position.
  • 3. The locking members 37 are pivoted back into their closed position, and cold feed material is charged through the upper opening released by the cover 36 moved to the side and the opening is immediately closed again.
  • 4. The electrodes 40 are moved into the treatment vessel 2 and the treatment process is initiated, the hot furnace gases flowing through the connecting channel 26 into the melting vessel 1, emitting sensible heat here to the feed material and then being passed through the charge material column in the charge material preheater 34 for further heat utilization . Simultaneously with the supply of heat through the second heating device into the treatment vessel - part of the heat can be supplied by blowing oxygen in through bath tub nozzles, sink stones and lances - the heat is supplied through the first heating device, i.e. in the present case through the burners 30, into the Melting jar to melt the material in this jar. The resulting hot furnace gases are also passed through the feed material retained in the charge preheater.
  • 5. After sufficient heat has been supplied by the electrodes 40 into the treatment vessel 2, the electrodes are pulled out of the treatment vessel by the electrode lifting and swiveling device, pivoted to the side and introduced into the melting vessel 1 in order to support the burner output and to accelerate the melting process.
  • 6. At the end of the melting process, when the bath level has almost reached the bottom 29 of the connecting channel and the treatment process in the treatment vessel has almost been completed, the electrodes are pivoted back to the treatment vessel and the unit is tilted in the negative direction of tilting. The process steps 1 to 6 described are then repeated.

    • Claims (15)

    1. A metallurgical unit for smelting metal charge material and for the post-treatment of the molten metal, which can be tilted from a starting position in a positive tilting direction (8) about a tilt axis (7) or can be rolled along a rolling track (4), including:
      a) a melting vessel (1) which is provided with a charging opening (10) for introduction of the charge material and which includes a furnace hearth (12) for receiving the molten metal (13), in the side wall of which is arranged a discharge flow opening (15) for removal of the molten metal (13) from the furnace hearth when the unit is tilted,
      b) a first heating arrangement (30, 38) associated with the melting vessel for smelting the charge material,
      c) a treatment vessel (2) disposed laterally on the melting vessel for receiving the molten metal from the furnace hearth (12) of the melting vessel (1) and for the metallurgical treatment, which includes an intake opening (22) for the molten metal and a tapping opening (18),
      d) a second heating arrangement (38) associated with the treatment vessel for the metallurgical treatment of the molten metal, and
      e) a passage (26) which connects the discharge flow opening (15) of the melting vessel (1) to the intake opening (22) of the treatment vessel (2) and by way of which the molten metal (13) which flows away out of the discharge flow opening (15) of the melting vessel (1) when the unit is tilted in the positive tilting direction (8) can be transferred into the treatment vessel (2), wherein in plan view the connecting line (23) from the centre point (17) of the melting vessel (1) to the centre point (20) of the treatment vessel (2) includes an acute angle (α) relative to the positive tilting direction (8) of the unit.
    2. A metallurgical unit according to claim 1 characterised in that for removal of slag it can be tilted or rolled in a negative tilting direction (9) which is opposite to the positive tilting direction (8).
    3. A metallurgical unit according to one of claims 1 and 2 characterised in that in plan view a line drawn relative to the positive tilting direction (8) through the centre point (17) of the melting vessel (1) intersects the vessel wall thereof in the region of the discharge flow opening (15).
    4. A metallurgical unit according to one of claims 1 to 3 characterised in that the wall of the melting vessel (1) has a working opening (16) on the side opposite to the discharge flow opening (15).
    5. A metallurgical unit according to one of claims 1 to 4 characterised in that the tapping opening (18) of the treatment vessel (2), relative to the positive tilting direction (8), is arranged eccentrically in the outer edge region of the bottom (24) of the treatment vessel (2).
    6. A metallurgical unit according to one of claims 1 to 5 characterised in that the wall of the treatment vessel (2) has a working opening (21) in the negative tilting direction (9), with respect to the vessel centre (29).
    7. A metallurgical unit according to one of claims 1 to 6 characterised in that in the non-tilted condition (starting position) of the metallurgical unit the sole (29) of the connecting passage (26) is higher than the bottom (25) of the mounting vessel (1).
    8. A metallurgical unit according to claim 7 characterised in that the sole (29) of the connecting passage (26) is higher than the bottom (25) of the melting vessel (1) by an amount which in the starting position of the unit permits retention of the molten metal (13) in the furnace hearth (12) of the melting vessel (1) of at least half the capacity of the treatment vessel (2).
    9. A metallurgical unit according to one of claims 1 to 8 characterised in that in the starting position of the unit the bottom (24) of the treatment vessel (2) is lower than the bottom (25) of the melting vessel (1).
    10. A metallurgical unit according to one of claims 1 to 9 characterised in that the connecting passage (26) is in the form of an upwardly open channel in a partition wall (28) of refractory material between the two vessels (1 and 2).
    11. A metallurgical unit according to one of claims 1 to 10 characterised in that a lifting and pivoting assembly (33) for at least one electrode (40) which can be selectively introduced into the melting vessel (1) and the treatment vessel (2) is arranged beside the structural unit comprising the melting vessel (1) and the treatment vessel (2).
    12. A metallurgical unit according to one of claims 1 to 11 characterised in that the lifting and pivoting assembly (33) for the electrode (40) is arranged on a tiltable frame (3) carrying the structural unit comprising the melting vessel (1) and the treatment vessel (2).
    13. A metallurgical unit according to one of claims 1 to 12 characterised in that nozzles (40, 32) open into the melting vessel (1) and/or the treatment vessel (2), for injecting gases and solids.
    14. A metallurgical unit according to one of claims 1 to 13 characterised in that the cover (11) of the melting vessel (1) is fixed in a holding structure (35) which at the same time carries a shaft which is in the form of a charging material preheater (34) and whose lower opening opens into the interior of the melting vessel (1).
    15. A metallurgical unit according to claim 14 characterised in that the charging material preheater (34) has shut-off members (37) which are movable from a closure position for retaining charging material in the interior of the charging material preheater (34) into a release position in which they open the shaft for the charge material to pass through the charging material preheater.
    EP95942719A 1994-12-21 1995-12-21 Tilting metallurgical unit comprising several vessels Expired - Lifetime EP0799323B1 (en)

    Applications Claiming Priority (3)

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    DE4445783 1994-12-21
    DE4445783A DE4445783A1 (en) 1994-12-21 1994-12-21 Tiltable metallurgical aggregate
    PCT/EP1995/005072 WO1996019592A1 (en) 1994-12-21 1995-12-21 Tilting metallurgical unit comprising several vessels

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    EP0799323A1 EP0799323A1 (en) 1997-10-08
    EP0799323B1 true EP0799323B1 (en) 1999-09-15

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    EP (1) EP0799323B1 (en)
    JP (1) JPH10510880A (en)
    CN (1) CN1043245C (en)
    AT (1) ATE184656T1 (en)
    AU (1) AU4388796A (en)
    BR (1) BR9510171A (en)
    CA (1) CA2208229A1 (en)
    DE (2) DE4445783A1 (en)
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    GR (1) GR3031565T3 (en)
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    JPH02290912A (en) * 1989-04-28 1990-11-30 Daido Steel Co Ltd Apparatus and method for melting

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    ATE184656T1 (en) 1999-10-15
    WO1996019592A1 (en) 1996-06-27
    BR9510171A (en) 1997-10-14
    JPH10510880A (en) 1998-10-20
    GR3031565T3 (en) 2000-01-31
    CA2208229A1 (en) 1996-06-27
    ES2135787T3 (en) 1999-11-01
    AU4388796A (en) 1996-07-10
    CN1043245C (en) 1999-05-05
    DE59506858D1 (en) 1999-10-21
    EP0799323A1 (en) 1997-10-08
    CN1171136A (en) 1998-01-21
    DK0799323T3 (en) 1999-12-20
    DE4445783A1 (en) 1996-06-27
    US5882578A (en) 1999-03-16

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