[go: up one dir, main page]

EP0195770B1 - 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

Info

Publication number
EP0195770B1
EP0195770B1 EP86890063A EP86890063A EP0195770B1 EP 0195770 B1 EP0195770 B1 EP 0195770B1 EP 86890063 A EP86890063 A EP 86890063A EP 86890063 A EP86890063 A EP 86890063A EP 0195770 B1 EP0195770 B1 EP 0195770B1
Authority
EP
European Patent Office
Prior art keywords
oxygen
fixed bed
containing gas
gas
bed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP86890063A
Other languages
German (de)
French (fr)
Other versions
EP0195770A1 (en
Inventor
Rolf Dr Dipl Ing Hauk
Werner Dr Dipl Ing Kepplinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Primetals Technologies Austria GmbH
Deutsche Voest Alpine Industrieanlagenbau GmbH
Original Assignee
Voest Alpine Industrienlagenbau GmbH
Deutsche Voest Alpine Industrieanlagenbau GmbH
Korf Engineering GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Voest Alpine Industrienlagenbau GmbH, Deutsche Voest Alpine Industrieanlagenbau GmbH, Korf Engineering GmbH filed Critical Voest Alpine Industrienlagenbau GmbH
Publication of EP0195770A1 publication Critical patent/EP0195770A1/en
Application granted granted Critical
Publication of EP0195770B1 publication Critical patent/EP0195770B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • 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 a fluidized bed (fluidized bed) made of coke particles above it, and the iron-containing material is given to the fluidized bed.
  • 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 mentioned at the outset in that a non-gassed 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 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.
  • the height of the fixed bed through which oxygen-containing gas flows is expediently set and maintained via the particle size distribution of the coal introduced into the melter gasifier.
  • the fixed bed can be particularly pronounced if the grain 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.
  • 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.
  • at least one discharge 5 for the reducing gas formed is provided in the upper section.
  • the fixed beds (fixed bed zones) designated I and II are formed from coarser coke particles.
  • the melt pool that accumulates underneath consists of the molten metal 6 and the slag 7, wherein a tapping can be provided for both components I does not have a gas supply, so it is not gas-filled, above which 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 is also not equipped with any gas supply lines. It is only kept in motion by the carbon monoxide-containing reaction gases generated in fixed bed II. Small coal or coke particles remain in the fluidized bed zone 111. Larger coal or Coke particles for which the empty pipe velocity of the gas flow is below the loosening point for a corresponding particle bed are only braked, fall through the fluid 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, communicated to the sponge iron to be melted in countercurrent, and the melt formed, consisting of slag and metal, is overheated.
  • the overheating must be so strong (approx. To 1600 ° C) that it covers the heat required for the endothermic reactions taking place in the fixed bed zones I and II and the melt collected in the lower part of the melter gasifier still has a sufficient temperature for 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, a nozzle plane is eliminated.
  • 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 I set 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 it.
  • the reducing gas was discharged 5 in a quantity of 1330 m 3 ( deducted under normal conditions) / t 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%.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Iron (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)

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 sauerstoffhältigen 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 a fluidized bed (fluidized bed) made of coke particles above it, and the iron-containing material is given to the fluidized bed.

Ein Verfahren der bezeichneten Art ist in der EP-A 1-0 114 040 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-A 1-0 114 040, the oxygen-containing gas being introduced at two different levels, etc. into the fixed bed and the fluid bed of coke particles above.

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 a fluidized bed zone lying above it enables an increase in the melting capacity and an increase in the temperature of the molten metal, as a result of which 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 Wärmeträgern, 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-A1-0 114 040 has advantages, there are substantial disadvantages in that the partially reoxidation of the melted, pre-reduced inevitably takes place in the fluidized bed zone (fluidized bed) loaded with oxygen-containing gas 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 media 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 verringern.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 sauerstoffreiem bzw. sauerstoffarmem Gas durchströmt wird.This object is achieved according to the invention in a method of the type mentioned at the outset in that a non-gassed 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.The larger particles of the coal added to the melter gasifier from above or the other carbon-containing fuels settle out of the fluidized bed (fluidized bed) into the fixed bed.

Die beiden Festbettzonen werden durch Koksteilchen mit einer Korngröße 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 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 Korngrößenverteilung 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 particle size distribution of the coal introduced into the melter gasifier.

Besonders ausgeprägt kann das Festbett ausgebildet werden, wenn die Kornklassierung des Grobanteiles der eingebrachten Kohle in engen Grenzen liegt.The fixed bed can be particularly pronounced if the grain 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 ist.The 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 Eisenteilchen, wie Eisenschwamm. Weiters ist im oberen Abschnitt wenigstens eine Abführung 5 für das gebildete Reduktionsgas vorgesehen. Im mittleren Abschnitt 1" werden aus gröberen Koksteilchen 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 II wird ein Fließbett 111 gebildet, welches ebenfalls mit keinen Gaszuführungsleitungen ausgestattet ist. Es wird ausschließlich durch die im Festbett II entstehenden, kohlenmonoxidhältigen Reaktionsgase in Bewegung gehalten. Kleine Kohle- bzw. Kokspartikel bleiben in der Fließbettzone 111. 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 ″, the fixed beds (fixed bed zones) designated I and II are formed from coarser coke particles. The melt pool that accumulates underneath consists of the molten metal 6 and the slag 7, wherein a tapping can be provided for both components I does not have a gas supply, so it is not gas-filled, above which 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 is also not equipped with any gas supply lines. It is only kept in motion by the carbon monoxide-containing reaction gases generated in fixed bed II. Small coal or coke particles remain in the fluidized bed zone 111. Larger coal or Coke particles for which the empty pipe velocity of the gas flow is below the loosening point for a corresponding particle bed are only braked, fall through the fluid 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 bleibt.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.

Im Festbett II 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 Überhitzung mun 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 II, the heat required for the process is generated in a known manner by gasifying coal, communicated to the sponge iron to be melted in countercurrent, and the melt formed, consisting of slag and metal, is overheated. The overheating must be so strong (approx. To 1600 ° C) that it covers the heat required for the endothermic reactions taking place in the fixed bed zones I and II and the melt collected in the lower part of the melter gasifier still has a sufficient temperature for further treatment .

In den Festbettzonen 1 und 11, 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 1 and 11, 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; d. H. there are lower demands on the operation in the upstream direct reduction shaft furnace. 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 wegfällt.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, a nozzle plane is eliminated.

Als Beispiel für die Durchführung des erfindungsgemänen 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 obergang von der Zone II in die Zone I 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. 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 %.To obtain 1000 kg of pig iron, 1060 kg of sponge iron with a degree of metallization of 80%, a carbon content of 1% and a temperature of 800 ° C from a direct reduction shaft furnace were used 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 about the middle of the fixed bed II, at the boundary between the fixed bed II and the fluidized bed III 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 I set 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 it. The reducing gas was discharged 5 in a quantity of 1330 m 3 ( deducted under normal conditions) / t 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. Method of producing molten pig iron or steel pre-products from particulate ferrous material, in particular from pre-reduced iron sponge, as well as of producing reduction gas in a melt-down gasifier (1) by adding coal and by blowing in oxygen-containing gas by means of nozzle pipes (2) penetrating the wall of the melt-down gasifier, wherein a fixed bed formed of coke particles through which the oxygen-containing gas flows and a superposed fluidised bed of coke particles are formed and the ferrous material is charged onto the fluidised bed, characterised in that below the fixed bed (II) through which oxygen-containing gas flows, a fixed bed (1) of coke particles not passed through by gas is provided, and that the fluidised bed (III) above the fixed bed (II) passed through by oxygen-containing gas is passed through by a gas free from oxygen or having a low oxygen content.
2. Method according to claim 1, characterised in that the height of the fixed bed (11) flowed through by the oxygen-containing gas is adjusted and maintained via the grain size distribution of the coal introduced into the melt-down 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

Publications (2)

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

Family

ID=3501117

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86890063A Expired EP0195770B1 (en) 1985-03-21 1986-03-17 Process for the production of molten pig iron or steel pre-products

Country Status (15)

Country Link
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)
BR (1) BR8601242A (en)
CA (1) CA1268633A (en)
CS (1) CS264273B2 (en)
DD (1) DD247025A5 (en)
DE (1) DE3661424D1 (en)
IN (1) IN166414B (en)
SU (1) SU1473716A3 (en)
ZA (1) ZA861922B (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT386007B (en) * 1986-10-30 1988-06-27 Voest Alpine Ag METHOD AND SYSTEM FOR THE EXTRACTION OF METALS OR. METAL ALLOYS
AT386006B (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
UA43905C2 (en) * 1996-11-08 2002-01-15 Фоест-Альпіне Індустріанлагенбау Гмбх METHOD OF OBTAINING MELTED CAST IRON OR SEMI-FINISHED STEEL
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
AT506042A1 (en) * 2007-11-13 2009-05-15 Siemens Vai Metals Tech Gmbh METHOD FOR MELTING RAW IRONS AND STEEL PREPARED PRODUCTS IN A MELTING GASER
CN116949236A (en) * 2023-04-25 2023-10-27 薛世峰 Method and system for producing steel by reducing non-blast furnace step by step

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3948645A (en) * 1973-04-30 1976-04-06 Boliden Aktiebolag Method of carrying out heat-requiring chemical and/or physical processes in a fluidized bed
SE457265B (en) * 1981-06-10 1988-12-12 Sumitomo Metal Ind PROCEDURE AND ESTABLISHMENT FOR PREPARATION OF THANKS
AT378970B (en) * 1982-12-21 1985-10-25 Voest Alpine Ag METHOD AND DEVICE FOR THE PRODUCTION OF LIQUID PIPE IRON OR STEEL PRE-PRODUCTS
AT376241B (en) * 1983-01-03 1984-10-25 Voest Alpine Ag METHOD FOR MELTING AT LEAST PARTLY 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
DE3438487A1 (en) * 1984-10-17 1986-04-24 Korf Engineering GmbH, 4000 Düsseldorf METHOD FOR THE PRODUCTION OF RAW IRON
SU1479006A3 (en) * 1984-11-26 1989-05-07 Фоест-Альпине (Фирма) Method of producing molten iron or steel products and reducing gas in melting gasifier
DE3504346C2 (en) * 1985-02-06 1986-11-27 Korf Engineering GmbH, 4000 Düsseldorf Method and device for the production of sponge iron particles and liquid pig iron

Also Published As

Publication number Publication date
JPS61221315A (en) 1986-10-01
US4708736A (en) 1987-11-24
DD247025A5 (en) 1987-06-24
CN86101817B (en) 1988-07-06
BR8601242A (en) 1986-12-02
CS196586A2 (en) 1988-09-16
ATA84685A (en) 1986-07-15
DE3661424D1 (en) 1989-01-19
AU5466486A (en) 1986-09-25
AT382390B (en) 1987-02-25
EP0195770A1 (en) 1986-09-24
CS264273B2 (en) 1989-06-13
AU574906B2 (en) 1988-07-14
JPS648044B2 (en) 1989-02-13
ZA861922B (en) 1986-11-26
KR860007386A (en) 1986-10-10
KR930007308B1 (en) 1993-08-05
SU1473716A3 (en) 1989-04-15
IN166414B (en) 1990-05-05
CA1268633A (en) 1990-05-08
CN86101817A (en) 1986-11-05

Similar Documents

Publication Publication Date Title
AT404735B (en) METHOD AND INSTALLATION FOR THE PRODUCTION OF LIQUID PIPE IRON OR LIQUID STEEL PRE-PRODUCTS
DE3932182C2 (en) Process for the production of molten pig iron and plant for carrying out the process
DE69318750T2 (en) Melting reduction process with high productivity
DE2401909C3 (en) Process for the production of steel
EP0126391B1 (en) Iron production method
EP0114040B1 (en) Method and melt-down gasifier for producing molten pig iron or crude steel products
DE69914613T2 (en) DIRECT MELTING
EP0195770B1 (en) Process for the production of molten pig iron or steel pre-products
EP0193488B1 (en) Process and apparatus for producing sponge iron and liquid pig iron
DE4025320C3 (en) Process for the direct reduction of ferrous metal oxides
DE68927409T2 (en) PRODUCTION OF IRON AND STEEL IN A DUPLEX PREPARATION PLANT AND PLANT FOR PRE-REDUCING OXIDE SOLIDS IN THE FLOATING
EP0670910B1 (en) Process and device for producing pig iron from iron ore or for thermally and/or chemically treating an easily decomposable material
AT406480B (en) METHOD FOR THE PRODUCTION OF LIQUID PIPE IRON OR STEEL PRE-PRODUCTS AND SYSTEM FOR IMPLEMENTING THE METHOD
DE4041689C2 (en) Process and plant for producing liquid steel from iron oxides
EP0914475B1 (en) Method of producing liquid pig iron or liquid steel precursors
DE2132150B2 (en) Process for the direct manufacture of steel
DE2844056C3 (en) Method and device for the production of steel from iron ore dust by direct reduction
EP0897430B1 (en) Method of producing liquid crude iron or liquid steel fabricated materials
AT404022B (en) METHOD AND INSTALLATION FOR THE PRODUCTION OF LIQUID PIPE IRON OR STEEL PRE-PRODUCTS FROM IRON-CONTAINING MATERIAL
EP0910673B1 (en) Process for producing a reduction gas for reduction of metal ore
DE3629589C2 (en)
EP0533866B1 (en) Process and reduction and melting furnace for producing liquid metal from fine metal oxide particles
EP1246947B1 (en) Method for producing pig iron
DE3712846A1 (en) IMPROVED METHOD FOR PRODUCING METALLIZED PELLETS
DE3731851C2 (en)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE FR GB IT LU NL SE

17P Request for examination filed

Effective date: 19870309

17Q First examination report despatched

Effective date: 19880601

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: DEUTSCHE VOEST-ALPINE INDUSTRIEANLAGENBAU GMBH

Owner name: VOEST-ALPINE INDUSTRIEANLAGENBAU GESELLSCHAFT M.B.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE FR GB IT LU NL SE

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3661424

Country of ref document: DE

Date of ref document: 19890119

ET Fr: translation filed
ITF It: translation for a ep patent filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
EPTA Lu: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 86890063.0

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20020222

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20020228

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20020305

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20020315

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20020322

Year of fee payment: 17

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030317

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030318

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030331

BERE Be: lapsed

Owner name: *DEUTSCHE VOEST-ALPINE INDUSTRIEANLAGENBAU G.M.B.H

Effective date: 20030331

Owner name: *VOEST-ALPINE INDUSTRIEANLAGENBAU G.M.B.H.

Effective date: 20030331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031001

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20030317

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031127

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20031001

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20050309

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 20050316

Year of fee payment: 20

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050317