EP0195770A1 - Process for the production of molten pig iron or steel pre-products - Google Patents

Process for the production of molten pig iron or steel pre-products Download PDF

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Publication number
EP0195770A1
EP0195770A1 EP86890063A EP86890063A EP0195770A1 EP 0195770 A1 EP0195770 A1 EP 0195770A1 EP 86890063 A EP86890063 A EP 86890063A EP 86890063 A EP86890063 A EP 86890063A EP 0195770 A1 EP0195770 A1 EP 0195770A1
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EP
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Prior art keywords
oxygen
fixed bed
fluidized bed
containing gas
iron
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EP86890063A
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German (de)
French (fr)
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EP0195770B1 (en
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Rolf Dr Dipl Ing Hauk
Werner Dr Dipl Ing Kepplinger
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Primetals Technologies Austria GmbH
Deutsche Voest Alpine Industrieanlagenbau GmbH
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Voestalpine AG
Voest Alpine Industrienlagenbau GmbH
Deutsche Voest Alpine Industrieanlagenbau GmbH
Korf Engineering GmbH
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Application filed by Voestalpine AG, Voest Alpine Industrienlagenbau GmbH, Deutsche Voest Alpine Industrieanlagenbau GmbH, Korf Engineering GmbH filed Critical Voestalpine AG
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
    • C21B13/0013—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state introduction of iron oxide into a bath of molten iron containing a carbon reductant
    • C21B13/002—Reduction of iron ores by passing through a heated column of carbon

Definitions

  • the invention relates to a process for the production of molten pig iron or intermediate steel products from particulate ferrous material, in particular from pre-reduced iron sponge, and for the production of reducing gas in a melter gasifier by adding coal and by blowing in oxygen-containing gas by means of nozzle pipes penetrating the wall of the melter gasifier, one of which being a fixed bed of coke particles through which the oxygen-containing gas flows and above which a fluidized bed (fluidized bed) of coke particles is formed and the iron-containing material is given to the fluidized bed.
  • EP-A1-0 114 040 A method of the type described is described in EP-A1-0 114 040, the oxygen-containing gas being introduced at two different levels, respectively into the fixed bed and into the fluid bed of coke particles above it.
  • the invention aims at avoiding the difficulties described and has as its object to avoid reoxidation of the molten products in the melter and to reduce the primary energy requirement.
  • This object is achieved according to the invention in a method of the type described in the introduction in that a non-gasified fixed bed of coke particles is provided below the fixed bed through which oxygen-containing gas flows and in that the fluidized bed is flowed through by oxygen-free or oxygen-poor gas over the fixed bed through which oxygen-containing gas flows.
  • the height of the fixed bed through which oxygen-containing gas flows is expediently set and maintained via the grain size distribution of the coal introduced into the melter gasifier.
  • the fixed bed can be particularly pronounced if the co-classification of the coarse fraction of the coal introduced is within narrow limits.
  • the refractory lined melter 1 has a lower section 1 ', a middle section 1 "and an enlarged upper section 1" ".
  • the lower section 1 ' is intended for receiving the molten bath.
  • at least one discharge 5 for the reducing gas formed is provided in the upper section.
  • coarser coke sticks are used to form the fixed beds (fixed bed zones) labeled I and II.
  • the melt pool that accumulates underneath consists of - molten metal 6 and the slag 7, whereby a tapping can be provided for both components.
  • the fixed bed I has no gas supply, so it is not gas-fired.
  • the fixed bed II is formed, in which the coke particles are flowed through by the oxygen-containing gas flowing in from the supply lines 2 to form carbon monoxide
  • the gas supply lines are only kept in motion by the reaction gases in the fixed bed II, which contain carbon monoxide.
  • Small coal or coke particles remain in the fluidized bed zone III. Larger coal or coke particles, for which the empty pipe speed of the gas flow is below the loosening point for a ent protruding particle bed, are only slowed down, fall through the fluidized bed III and settle to form the fixed bed II or the fixed bed I.
  • zone III As a result of the fact that zone III is not exposed to oxygen or oxygen-containing gas, there is a reducing gas atmosphere in this zone, as a result of which the carbon content of the pre-reduced iron-containing particles, such as sponge iron, introduced from above is retained
  • the heat required for the process is generated in a known manner by gasifying coal, the sponge iron to be melted is countercurrently communicated, and the melt formed, consisting of slag and metal, is overheated.
  • the overheating must be so strong (approx. that the heat demand for the endothermic reactions taking place in the fixed bed zones I and II is covered and that the melt collected in the lower part of the melter gasifier still has a temperature sufficient for the further treatment.
  • Another advantage of the method according to the invention is that the assembly or. Instrumentation effort is lower because, compared to the method of operation mentioned at the beginning, there is no nozzle plane
  • the slag or Metal bath had a temperature of 1400 to 1500 ° C; in the expanded upper section 1 ′′ of the melter gasifier, a gas temperature of 1500 ° C. was measured at the upper limit of the fluidized bed III, and a gas temperature of 1100 ° C. in the so-called calming zone above.
  • the reducing gas was withdrawn via outlets 5 in an amount of 1330 m 3 (under normal conditions) / t of pig iron, the pig iron formed had a C content of 3.5%, an Si content of 0.3% and an S content of 0.1%.

Abstract

Bei einem Verfahren zur Herstellung von flüssigem Roheisen oder Stahlvorprodukten aus teilchenförmigem eisenhältigem Material, insbesondere aus vorreduziertem Eisenschwamm, sowie zur Erzeugung von Reduktionsgas in einem Einschmelzvergaser (1) durch Zugabe von Kohle und durch Einblasen von sauerstoffhältigem Gas mittels die Wand des Einschmelzvergasers durchsetzender Düsenrohre (2), wobei ein von dem sauerstoffhältigen Gas durchströmtes Festbett aus Kokspartikeln und darüber ein Fließbett (Wirbelbett) aus Kokspartikeln gebildet werden und das eisenhältige Material dem Fließbett aufgegeben wird, werden Reoxidationsvorgänge der flüssigen eisenhältigen Produkte vermieden und der Bedarf an Primärenergie verringert, indem unterhalb des von sauerstoffhältigem Gas durchströmten Festbettes (II) ein nicht durchgastes Festbett (I) aus Kokspartikeln vorgesehen wird und das Fließbett (III) über dem von sauerstoffhältigem Gas durchströmten Festbett (II) von sauerstofffreiem bzw. sauerstoffarmem Gas durchströmt wird.In a process for the production of molten pig iron or intermediate steel products from particulate ferrous material, in particular from pre-reduced sponge iron, and for the production of reducing gas in a melter gasifier (1) by adding coal and by blowing in oxygen-containing gas by means of nozzle pipes passing through the wall of the melter gasifier (2 ), whereby a fixed bed of coke particles through which the oxygen-containing gas flows and above which a fluidized bed (fluidized bed) of coke particles is formed and the iron-containing material is given to the fluidized bed, reoxidation processes of the liquid iron-containing products are avoided and the need for primary energy is reduced by below the fixed bed (II) through which oxygen-containing gas flows, a non-gassed fixed bed (I) made of coke particles and the fluidized bed (III) above the fixed bed (II) through which oxygen-containing gas flows, of oxygen-free or low-oxygen gas is flowed through.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung von flüssigem Roheisen oder Stahlvorprodukten aus teilchenförmigem eisenhältigem Material, insbesondere aus vorreduziertem Eisenschwamm, sowie zur Erzeugung von Reduktionsgas in einem Einschmelzvergaser durch Zugabe von Kohle und durch Einblasen von sauerstoffhältigem Gas mittels die Wand des Einschmelzvergasers durchsetzender Düsenrohre, wobei ein von dem sauerstoffhättigen Gas durchströmtes Festbett aus Kokspartikeln und darüber ein Fließbett (Wirbelbett) aus Kokspartikeln gebildet werden und das eisenhältige Material dem Fließbett aufgegeben wird.The invention relates to a process for the production of molten pig iron or intermediate steel products from particulate ferrous material, in particular from pre-reduced iron sponge, and for the production of reducing gas in a melter gasifier by adding coal and by blowing in oxygen-containing gas by means of nozzle pipes penetrating the wall of the melter gasifier, one of which being a fixed bed of coke particles through which the oxygen-containing gas flows and above which a fluidized bed (fluidized bed) of coke particles is formed and the iron-containing material is given to the fluidized bed.

Ein Verfahren der bezeichneten Art ist in der EP-A1 -0 114 040 beschrieben, wobei das sauerstoffhältige Gas in zwei verschiedenen Ebenen eingeleitet wird, u.zw in das Festbett und in das darüber liegende Fließbett aus Kokspartikeln.A method of the type described is described in EP-A1-0 114 040, the oxygen-containing gas being introduced at two different levels, respectively into the fixed bed and into the fluid bed of coke particles above it.

- Die beschriebene Kombination einer Festbettzone mit einer darüber liegenden Fließbettzone ermöglicht eine Erhöhung der Schmelzleistung und eine Erhöhung der Temperatur des schmelzflüssigen Metalls, wodurch bestimmte metallurgische Reaktionen erleichtert werden. Größere Partikel des in den Einschmelzvergaser eingebrachten Materials, die im Fließbett nicht aufgeschmolzen werden, werden vom Festbett zurückgehalten und gelangen nicht unmittelbar in das im unteren Teil des Einschmelzvergasers sich ansammelnde Schmelzbad, welches eine Temperatur von 1400 bis 1500°C aufweist; in diesem trennen sich sodann Metall und Schlacke aufgrund ihrer unterschiedlichen Dichte.- The described combination of a fixed bed zone with an overlying fluidized bed zone enables an increase in the melting capacity and an increase in the temperature of the molten metal, whereby certain metallurgical reactions are facilitated. Larger particles of the material introduced into the melter gasifier, which are not melted in the fluidized bed, are retained by the fixed bed and do not get directly into the melt pool which collects in the lower part of the melter gasifier and which has a temperature of 1400 to 1500 ° C .; in this metal and slag then separate due to their different density.

Obgleich die Kombination einer Festbettzone mit einer Fließbettzone in der aus der EP-A1 -0 114 040 bekannten Weise Vorteile aufweist, liegen wesentliche Nachteile doch darin, daß die in der mit sauerstoffhältigem Gas beaufschlagten Fließbettzone (Wirbelschicht) zwangsläufig stattfindende teilweise Reoxidation der aufzuschmelzenden, vorreduzierten eisenhältigen Partikel in der darunterliegenden, ebenfalls mit sauerstoffhältigem Gas beaufschlagten Festbettzone nur zum Teil wieder rückgängig gemacht werden kann und daß die Verweilzeit der Partikel und die Temperatur im Festbett nicht ausreichen, um eine wesentliche Aufkohlung zu erzielen. Es fällt ein Roheisen mit zwar ausreichender Badtemperatur, jedoch noch geringem Anteil an chemischen Wärmeträgem, wie Kohlenstoff, Silizium und Mangan an.Although the combination of a fixed bed zone with a fluidized bed zone in the manner known from EP - A 1 -0 114 040 has advantages, there are significant disadvantages in that the fluidized bed zone (fluidized bed) inevitably takes place in the fluidized bed zone which is exposed to oxygen-containing gas. Pre-reduced iron-containing particles in the underlying fixed bed zone, which is also exposed to oxygen-containing gas, can only be partially reversed and that the residence time of the particles and the temperature in the fixed bed are not sufficient to achieve a significant carburization. A hot metal is obtained with a sufficient bath temperature, but still a low proportion of chemical heat transfer agents such as carbon, silicon and manganese.

Die Erfindung bezweckt die Vermeidung der geschilderten Schwierigkeiten und stellt sich die Aufgabe, eine Reoxidation der schmelzflüssigen Produkte im Einschmelzvergaser zu vermeiden und den Primärenergiebedarf zu verringem.The invention aims at avoiding the difficulties described and has as its object to avoid reoxidation of the molten products in the melter and to reduce the primary energy requirement.

Diese Aufgabe wird erfindungsgemäß bei einem Verfahren der eingangs bezeichneten Art dadurch gelöst, daß unterhalb des von sauerstoffhältigem Gas durchströmten Festbettes ein nicht durchgastes Festbett aus Kokspartikeln vorgesehen wird und daß das Fließbett über dem von sauerstoffhältigem Gas durchströmten Festbett von sauerstofffreiem bzw. sauerstoffarmem Gas durchströmt wird.This object is achieved according to the invention in a method of the type described in the introduction in that a non-gasified fixed bed of coke particles is provided below the fixed bed through which oxygen-containing gas flows and in that the fluidized bed is flowed through by oxygen-free or oxygen-poor gas over the fixed bed through which oxygen-containing gas flows.

Die größeren Teilchen der dem Einschmelzvergaser von oben zugegebenen Kohle oder der anderen kohlenstoffhältigen Brennstoffe setzen sich aus dem Fließbett (Wirbelbett) in das Festbett ab:

  • Die beiden Festbettzonen werden durch Koksteilchen mit einer Komgröße von 20 bis 60 mm, im wesentlichen durch Teilchen in der Größe zwischen 30 und 40 mm aufgebaut, während sich die kleineren Teilchen in der Fließbettzone befinden.
The larger particles of the coal added to the melter gasifier from above or the other carbon-containing fuels settle from the fluidized bed (fluidized bed) into the fixed bed:
  • The two fixed bed zones are built up by coke particles with a grain size of 20 to 60 mm, essentially by particles in the size between 30 and 40 mm, while the smaller particles are in the fluidized bed zone.

Zweckmäßig wird die Höhe des von sauerstoffhältigem Gas durchströmten Festbettes über die Komgrößenverteilung der in den Einschmelzvergaser eingebrachten Kohle eingestellt und aufrechterhalten.The height of the fixed bed through which oxygen-containing gas flows is expediently set and maintained via the grain size distribution of the coal introduced into the melter gasifier.

Besonders ausgeprägt kann das Festbett ausgebildet werden, wenn die Komklassierung des Grobanteiles der eingebrachten Kohle in engen Grenzen liegt.The fixed bed can be particularly pronounced if the co-classification of the coarse fraction of the coal introduced is within narrow limits.

Die Durchführung des erfindungsgemäßen Verfahrens ist in der Zeichnung näher erläutert in welcher ein Einschmelzvergaser schematisch dargestellt istThe implementation of the method according to the invention is explained in more detail in the drawing, in which a melter gasifier is shown schematically

Der feuerfest ausgekleidete Einschmelzvergaser 1 besitzt einen unteren Abschnitt 1', einen mittleren Abschnitt 1" und einen erweiterten oberen Abschnitt 1'". Der untere Abschnitt 1' ist zur Aufnahme des schmelzflüssigen Bades bestimmt Im mittleren Abschnitt 1" münden Zuführungsleitungen (Düsenrohre) 2 für sauerstoffhältiges Gas und im oberen erweiterten Abschnitt 1"' Zuführungen 3 für stückige Kohle bzw. Koks und 4 für vorreduzierte Eisenteifchen, wie Eisenschwamm. Weiters ist im oberen Abschnitt wenigstens eine Abführung 5 für das gebildete Reduktionsgas vorgesehen. Im mittleren Abschnitt 1" werden aus gröberen Koksteifchen die mit I und II bezeichneten Festbetten (Festbettzonen) gebildet Das sich darunter ansammelnde Schmelzbad besteht aus dem - schmelzflüssigen Metall 6 und der Schlacke 7, wobei für beide Komponenten jeweils ein Abstich vorgesehen sein kann. Das Festbett I weist keine Gaszuführung auf; es ist also nicht durchgast Darüber wird das Festbett II gebildet in welchem die Kokspartikel von dem aus den Zuführungsleitungen 2 einströmenden sauerstoffhältigen Gas unter Bildung von Kohlenmonoxid durchströmt werden. Oberhalb des Festbettes 11 wird ein Fließbett III gebildet welches ebenfalls mit keinen Gaszuführungsleitungen ausgestattet ist Es wird ausschließlich durch die im Festbett II entstehenden, kohlenmonobdhältigen Reaktionsgase in Bewegung gehalten. Kleine Kohle-bzw. Kokspartikef bleiben in der Fließbettzone III. Größere Kohle-bzw. Kokspartikel, für die die Leerrohrgeschwindigkeit.des Gasstromes unter dem Lockerungspunkt für ein entsprechendes Partikelbett liegt, werden nur abgebremst, fallen durch das Fließbett III und setzen sich unter Bildung des Festbettes II bzw. des Festbettes I ab.The refractory lined melter 1 has a lower section 1 ', a middle section 1 "and an enlarged upper section 1" ". The lower section 1 'is intended for receiving the molten bath. In the middle section 1 "feed lines (nozzle pipes) 2 for oxygen-containing gas and in the upper extended section 1"' feed lines 3 for lumpy coal or coke and 4 for pre-reduced iron particles, such as sponge iron . Furthermore, at least one discharge 5 for the reducing gas formed is provided in the upper section. In the middle section 1 ", coarser coke sticks are used to form the fixed beds (fixed bed zones) labeled I and II. The melt pool that accumulates underneath consists of - molten metal 6 and the slag 7, whereby a tapping can be provided for both components. The fixed bed I has no gas supply, so it is not gas-fired. In addition, the fixed bed II is formed, in which the coke particles are flowed through by the oxygen-containing gas flowing in from the supply lines 2 to form carbon monoxide The gas supply lines are only kept in motion by the reaction gases in the fixed bed II, which contain carbon monoxide. Small coal or coke particles remain in the fluidized bed zone III. Larger coal or coke particles, for which the empty pipe speed of the gas flow is below the loosening point for a ent protruding particle bed, are only slowed down, fall through the fluidized bed III and settle to form the fixed bed II or the fixed bed I.

Infolge der Tatsache, daß die Zone III nicht mit Sauerstoff oder sauerstoffhältigem Gas beaufschlagt wird, befindet sich in dieser Zone eine reduzierende Gasatmosphäre, wodurch der Kohlenstoffgehalt der von oben eingebrachten vorreduzierten eisenhältigen Teilchen, wie Eisenschwamm, erhalten bleibtAs a result of the fact that zone III is not exposed to oxygen or oxygen-containing gas, there is a reducing gas atmosphere in this zone, as a result of which the carbon content of the pre-reduced iron-containing particles, such as sponge iron, introduced from above is retained

Im Festbett 11 wird in bekannter Weise durch Vergasen von Kohle die für den Prozeß erforderliche Wärme erzeugt dem zu schmelzenden Eisenschwamm im Gegenstrom mitgeteilt und die entstandene, aus Schlacke und Metall bestehende Schmelze überhitzt Die Uberhitzung muß so stark sein (ca. auf 1600°C), daß dadurch der Wärmebedarf für die in den Festbettzonen I und II ablaufenden endothermen Reaktionen gedeckt wird und die im unteren Teil des Einschmelzvergasers gesammelte Schmelze noch eine für die weitere Behandlung ausreichende Temperatur aufweist.In fixed bed 11, the heat required for the process is generated in a known manner by gasifying coal, the sponge iron to be melted is countercurrently communicated, and the melt formed, consisting of slag and metal, is overheated. The overheating must be so strong (approx. that the heat demand for the endothermic reactions taking place in the fixed bed zones I and II is covered and that the melt collected in the lower part of the melter gasifier still has a temperature sufficient for the further treatment.

In den Festbettzonen I und II, in denen mit Ausnahme des unmittelbaren Bereiches vor den Düsenrohren 2 keine oxidierenden Bedingungen mehr herrschen, erfolgt eine direkte Reaktion zwischen dem festen Kohlenstoff und Silizium und Mangan. Es ist auch eine Erhöhung des Kohlenstoffgehaltes des Eisenbades möglich, wodurch geringere Kohlenstoffgehalte im eingesetzten Eisenschwamm erforderlich sind; d.h. es werden geringere Anforderungen an den Betrieb im vorgeschalteten Direktreduktionsschachtofen gestellt Die Einstellung geringerer Kohlenstoffgehalte im Eisenschwamm ist mit einem geringeren Gasverbrauch im Schachtofen verbunden. Geringere Mengen an Reduktionsgas haben weiters geringere Kohlemengen für die Gaserzeugung im Einschmelzvergaser und geringere Mengen an Topgas aus dem Direktreduktionsschachtofen zur Folge, was einem geringeren Primärenergiebedarf entspricht.In the fixed bed zones I and II, in which, with the exception of the immediate area in front of the nozzle tubes 2, there are no longer any oxidizing conditions, there is a direct reaction between the solid carbon and silicon and manganese. An increase in the carbon content of the iron bath is also possible, as a result of which lower carbon contents are required in the sponge iron used; ie there are lower requirements for the Operation in the upstream direct reduction shaft furnace set Setting lower carbon levels in the sponge iron is associated with lower gas consumption in the shaft furnace. Lower amounts of reducing gas also result in lower amounts of coal for gas production in the melter and lower amounts of top gas from the direct reduction shaft furnace, which corresponds to a lower primary energy requirement.

Ein weiterer Vorteil des erfindungsgemäßen Verfahrens besteht auch darin, daß der Montage-bzw. Instrumentierungsaufwand geringer ist, weil gegenüber der eingangs erwähnten Arbeitsweise eine Düsenebene wegfälltAnother advantage of the method according to the invention is that the assembly or. Instrumentation effort is lower because, compared to the method of operation mentioned at the beginning, there is no nozzle plane

Als Beispiel für die Durchführung des erfindungsgemäßen Verfahrens wird angegeben:The following is given as an example for carrying out the method according to the invention:

Zur Gewinnung von 1000 kg Roheisen wurden 1060 kg Eisenschwamm mit einem Metallisierungsgrad von 80 %, einem Kohlenstoffgehalt von 1 % und einer Temperatur von 800°C aus einem Direktreduktionsschachtofen in den oberen Teil des Einschmelzvergasers eingesetzt. Gleichzeitig wurden 700 kg Anthrazit/t Roheisen zugeführt. 500 m3 - (unter Normalbedingungen) Sauerstoff/t Roheisen wurden durch die Zuführungsleitungen 2 eingebracht, wobei sich nach der Düsenebene bis etwa zur Mitte des Festbettes II eine Gastemperatur von über 2000°C, an der Grenze zwischen dem Festbett II und dem Fließbett III eine Gastemperatur von 1800°C bzw. eine Temperatur der eisenhältigen Partikel von 1200 bis 1300°C und beim Übergang von der Zone II in die Zone 1 eine Temperatur der Eisenträger von 1600°C einstellte. Das Schlacken-bzw. Metallbad hatte eine Temperatur von 1400 bis 1500°C; im erweiterten oberen Abschnitt 1"' des Einschmelzvergasers wurde an der Obergrenze des Fließbettes III eine Gastemperatur von 1500°C, in der darüberliegenden sogenannten Beruhigungszone eine Gastemperatur von 1100°C gemessen.For the production of 1000 kg 1060 kg pig iron sponge iron have been used with a degree of metallization of 80%, a carbon content of 1% and a temperature of 800 ° C from a direct reduction shaft furnace in the upper part of the melter gasifier. At the same time, 700 kg of anthracite / t of pig iron were added. 500 m 3 - (under normal conditions) oxygen / t pig iron were introduced through the feed lines 2, with a gas temperature of over 2000 ° C. after the nozzle level up to approximately the middle of the fixed bed II, at the boundary between the fixed bed II and the fluidized bed III a gas temperature of 1800 ° C or a temperature of the iron-containing particles of 1200 to 1300 ° C and at the transition from Zone II to Zone 1 a temperature of the iron carrier of 1600 ° C. The slag or Metal bath had a temperature of 1400 to 1500 ° C; in the expanded upper section 1 ″ of the melter gasifier, a gas temperature of 1500 ° C. was measured at the upper limit of the fluidized bed III, and a gas temperature of 1100 ° C. in the so-called calming zone above.

Das Reduktionsgas wurde über Abführungen 5 in einer Menge von 1330 m3 (unter Normalbedingungen)/t Roheisen abgezogen, das gebildete Roheisen hatte einen C-Gehalt von 3,5 %, einen Si-Gehalt von 0,3 % und einen S-Gehalt von 0,1 %.The reducing gas was withdrawn via outlets 5 in an amount of 1330 m 3 (under normal conditions) / t of pig iron, the pig iron formed had a C content of 3.5%, an Si content of 0.3% and an S content of 0.1%.

Claims (2)

1. Verfahren zur Herstellung von flüssigem Roheisen oder Stahlvorprodukten aus teilchenförmigem eisenhältigem Material, insbesondere aus vorreduziertem Eisenschwamm, sowie zur Erzeugung von Reduktionsgas in einem Einschmelzvergaser (1) durch Zugabe von Kohle und durch Einblasen von sauerstoffhältigem Gas mittels die Wand des Einschmelzvergasers durchsetzender Düsenrohre (2), wobei ein von dem sauerstoffhältigen Gas durchströmtes Festbett aus Kokspartikeln und darüber ein Fließbett (Wirbelbett) aus Kokspartikein gebildet werden und das eisenhältige Material dem Fließbett aufgegeben wird, dadurch gekennzeichnet, daß unterhalb des von sauerstoffhältigem Gas durchströmten Festbettes (11) ein nicht durchgastes Festbett (I) aus Kokspartikeln vorgesehen wird und daß das Fließbett - (III) über dem von sauerstoffhältigem Gas durchströmten Festbett (11) von sauerstofffreiem bzw. sauerstoffarmem Gas durchströmt wird.1.Procedure for the production of molten pig iron or intermediate steel products from particulate ferrous material, in particular from pre-reduced sponge iron, and for the production of reducing gas in a melter gasifier (1) by adding coal and by blowing in oxygen-containing gas by means of nozzle pipes passing through the wall of the melter gasifier (2 ), whereby a fixed bed of coke particles through which the oxygen-containing gas flows and above which a fluidized bed (fluidized bed) made of coke particles are formed and the iron-containing material is given to the fluidized bed, characterized in that a non-gas-gated fixed bed (11) below the fixed bed through which oxygen-containing gas flows (I) is provided from coke particles and that the fluidized bed - (III) over which the oxygen-containing gas flows through the fixed bed (11) is flowed through by oxygen-free or low-oxygen gas. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Höhe des von sauerstoffhältigem Gas durchströmten Festbettes (11) über die Komgrößenverteilung der in den Einschmelzvergaser (1) eingebrachten Kohle eingestellt und aufrechterhalten wird.2. The method according to claim 1, characterized in that the height of the fixed bed through which oxygen-containing gas flows (11) is adjusted and maintained via the grain size distribution of the coal introduced into the melter gasifier (1).
EP86890063A 1985-03-21 1986-03-17 Process for the production of molten pig iron or steel pre-products Expired EP0195770B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0084685A AT382390B (en) 1985-03-21 1985-03-21 METHOD FOR THE PRODUCTION OF LIQUID PIPE IRON OR STEEL PRE-PRODUCTS
AT846/85 1985-03-21

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EP0195770A1 true EP0195770A1 (en) 1986-09-24
EP0195770B1 EP0195770B1 (en) 1988-12-14

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US (1) US4708736A (en)
EP (1) EP0195770B1 (en)
JP (1) JPS61221315A (en)
KR (1) KR930007308B1 (en)
CN (1) CN86101817B (en)
AT (1) AT382390B (en)
AU (1) AU574906B2 (en)
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CA (1) CA1268633A (en)
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WO1998021370A1 (en) * 1996-11-08 1998-05-22 Voest-Alpine Industrieanlagenbau Gmbh Process for producing liquid pig iron or semifinished steel products from ore
WO2009062611A1 (en) * 2007-11-13 2009-05-22 Siemens Vai Metals Technologies Gmbh & Co Method for the production and the melting of liquid pig iron or of liquid steel intermediate products in a melt-down gasifier

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AT386006B (en) * 1986-10-30 1988-06-27 Voest Alpine Ag METHOD AND SYSTEM FOR THE EXTRACTION OF METALS OR. METAL ALLOYS
AT386007B (en) * 1986-10-30 1988-06-27 Voest Alpine Ag METHOD AND SYSTEM FOR THE EXTRACTION OF METALS OR. METAL ALLOYS
DE3787017T2 (en) * 1987-06-30 1993-11-25 Kawasaki Steel Co Method and device for producing liquid metal from ore particles.
BE1006828A3 (en) * 1991-07-12 1995-01-03 Elsen Tooling Ireland Ltd Method for the preparation of metals, particularly iron, from oxidised ores,at any reduction temperature in a drop reduction furnace
US5320676A (en) * 1992-10-06 1994-06-14 Bechtel Group, Inc. Low slag iron making process with injecting coolant
US5354356A (en) * 1992-10-06 1994-10-11 Bechtel Group Inc. Method of providing fuel for an iron making process
US5397376A (en) * 1992-10-06 1995-03-14 Bechtel Group, Inc. Method of providing fuel for an iron making process
US6197088B1 (en) 1992-10-06 2001-03-06 Bechtel Group, Inc. Producing liquid iron having a low sulfur content
US5958107A (en) * 1993-12-15 1999-09-28 Bechtel Croup, Inc. Shift conversion for the preparation of reducing gas
AT503593B1 (en) * 2006-04-28 2008-03-15 Siemens Vai Metals Tech Gmbh METHOD FOR THE PRODUCTION OF LIQUID RAW STEEL OR LIQUID STEEL PREPARED PRODUCTS MADE OF FINE-PARTICULAR OXYGEN-CONTAINING MATERIAL

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EP0114040A1 (en) * 1982-12-21 1984-07-25 VOEST-ALPINE Aktiengesellschaft Method and melt-down gasifier for producing molten pig iron or crude steel products
DE3345106A1 (en) * 1983-01-03 1984-07-12 Voest-Alpine Ag, Wien Process for smelting at least partially reduced iron ore
DD226157A3 (en) * 1983-06-01 1985-08-14 Bandstahlkombinat Matern Veb METHOD FOR PRODUCING LIQUID RAW STEEL AND REDUCTION GAS IN A SEPARATOR REFRIGERATOR

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Publication number Priority date Publication date Assignee Title
WO1998021370A1 (en) * 1996-11-08 1998-05-22 Voest-Alpine Industrieanlagenbau Gmbh Process for producing liquid pig iron or semifinished steel products from ore
CN1055503C (en) * 1996-11-08 2000-08-16 奥地利钢铁联合企业阿尔帕工业设备制造公司 Process for producing liquid pig iron or semifinished steel products from ore
US6179896B1 (en) 1996-11-08 2001-01-30 Deutsche Voest-Alpine Industrieanlagenbau Gmbh Process for producing liquid pig iron or semifinished steel products from ore
WO2009062611A1 (en) * 2007-11-13 2009-05-22 Siemens Vai Metals Technologies Gmbh & Co Method for the production and the melting of liquid pig iron or of liquid steel intermediate products in a melt-down gasifier
US8313552B2 (en) 2007-11-13 2012-11-20 Siemens Vai Metals Technologies Gmbh Method for the production and the melting of liquid pig iron or of liquid steel intermediate products in a melt-down gasifier
AU2008323317B2 (en) * 2007-11-13 2014-01-09 Posco Method for the production and the melting of liquid pig iron or of liquid steel intermediate products in a melt-down gasifier

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DD247025A5 (en) 1987-06-24
CN86101817B (en) 1988-07-06
CA1268633A (en) 1990-05-08
CS264273B2 (en) 1989-06-13
EP0195770B1 (en) 1988-12-14
AT382390B (en) 1987-02-25
CS196586A2 (en) 1988-09-16
IN166414B (en) 1990-05-05
ZA861922B (en) 1986-11-26
KR860007386A (en) 1986-10-10
ATA84685A (en) 1986-07-15
AU574906B2 (en) 1988-07-14
SU1473716A3 (en) 1989-04-15
JPS61221315A (en) 1986-10-01
DE3661424D1 (en) 1989-01-19
KR930007308B1 (en) 1993-08-05
US4708736A (en) 1987-11-24
BR8601242A (en) 1986-12-02
AU5466486A (en) 1986-09-25
JPS648044B2 (en) 1989-02-13
CN86101817A (en) 1986-11-05

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