EP1017859B1 - Process for producing sponge iron - Google Patents

Process for producing sponge iron Download PDF

Info

Publication number
EP1017859B1
EP1017859B1 EP98951258A EP98951258A EP1017859B1 EP 1017859 B1 EP1017859 B1 EP 1017859B1 EP 98951258 A EP98951258 A EP 98951258A EP 98951258 A EP98951258 A EP 98951258A EP 1017859 B1 EP1017859 B1 EP 1017859B1
Authority
EP
European Patent Office
Prior art keywords
delivery
process according
shaft
reduction
sponge iron
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
Application number
EP98951258A
Other languages
German (de)
French (fr)
Other versions
EP1017859A1 (en
Inventor
Hado Heckmann
Georg Schleich
Wolfgang Günther
Kurt Wieder
Wilhelm Stastny
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
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 filed Critical Voest Alpine Industrienlagenbau GmbH
Publication of EP1017859A1 publication Critical patent/EP1017859A1/en
Application granted granted Critical
Publication of EP1017859B1 publication Critical patent/EP1017859B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B13/00Making spongy iron or liquid steel, by direct processes
    • C21B13/14Multi-stage processes processes carried out in different vessels or furnaces
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B13/00Making spongy iron or liquid steel, by direct processes
    • C21B13/02Making spongy iron or liquid steel, by direct processes in shaft furnaces
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00Shaft or like vertical or substantially vertical furnaces
    • F27B1/10Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/21Arrangements of devices for discharging
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00Charging; Discharging; Manipulation of charge
    • F27D3/0033Charging; Discharging; Manipulation of charge charging of particulate material
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00Charging; Discharging; Manipulation of charge
    • F27D3/08Screw feeders; Screw dischargers

Definitions

  • the invention relates to a method according to the preamble of claim 1.
  • EP 0 166 679 A1 discloses an arrangement of one Smelting gasifier and a direct reduction shaft furnace with a bed of lumpy iron oxide, where the shaft furnace has a floor to support the pouring column, discharge openings in the floor for Discharge of the iron sponge particles and at least one Inlet for the reducing gas supplied by the carburetor in the lower section of the pouring column. Since the reducing gas is very dust-laden, there is a risk of blockage of the free spaces in the column with the consequence of a corresponding increase in volume resistance for the reducing gas.
  • Screw conveyors are intended for permanent mutual reciprocating movement of the particles the bed in the inlet for the reducing gas adjacent, through which the reducing gas flows Area, and continues to be at the opposite At least ends of the screw conveyors in the ground a discharge opening for the sponge iron particles is arranged.
  • the screw conveyors can be driven in this way done that either the individual snails in succession rotated in both directions or a combination of constantly outward and snails continuously conveying inside is.
  • Both discharge openings are opposite in this arrangement shielded the pouring column; the outer through a ring apron and the inner one by a cone.
  • the cone ends just above the screw conveyor or it contains passage openings into which the inner ones Grip the ends of the radially arranged screws. This ensures that the sponge iron not directly, i.e. without additional funding bodies reaches the discharge openings, but only transported to these by means of the screw conveyors can be. This is necessary to the back and forth to produce the resulting movement of the sponge iron.
  • the iron sponge sinking downwards is advantageous by one arranged between two discharge elements and rising above this Guide device to the side of the discharge elements and directed radially to the additional discharge opening. This increases the steering of the furniture material to the discharge organs and the additional Discharge opening reached.
  • a guide device with a Edge of the additional discharge opening diagonally upwards extending to the inner wall of the reduction shaft used upper edge, with the guide device downwards and radially outwards to Width of the lateral space can expand between the discharge organs. This ensures that the entire furniture material evenly sinks down until it's discharged becomes.
  • a reduction shaft with one is advantageous located below the additional discharge opening Manhole with the same or down tapering or expanding diameter whose lower end is closed and in which above of the bottom at least one other radially acting Discharge device for the sponge iron is arranged, used.
  • the figures show the part of the reduction shaft below the bustle level, i.e. the level in which the reducing gas is blown into the shaft to climb up through the Möller and the conversion of iron oxides into sponge iron cause.
  • the reduction shaft has a cylindrical or in areas conical jacket 1 on the bottom Ends in the ground 2.
  • a discharge organ in the form a screw conveyor 3 out.
  • the screw conveyors 3 transport the sunken to the floor 2 Möller radially outwards so that it is in each case Downpipe 4 passes through which it, for example into a melter gasifier generating the reducing gas to be led. This discharge of Möller enables the sinking of the furniture in the reduction shaft.
  • the radial screw conveyors 3 only extend over part of the radius of the reduction shaft, so that the snail heads a distance from the Have shaft axis and a circular area between form.
  • the bottom 2 contains one of these circular areas corresponding middle discharge opening, which in a cylindrical shaft 5 with respect to that of Reduction shaft corresponding to a reduced diameter transforms.
  • each two screw conveyors 3 a wedge-shaped guide element 6.
  • the front or upper edge of the guide elements extends from the edge of the middle discharge opening rising up to the inner wall of the jacket 1, the slope angle of this edge compared to the Vertical is about 25 to 40 °.
  • the angle of inclination of the side surfaces of the guide elements 6 is approximately in the range of 5 to 15 °.
  • the guide elements 6 guide the sinking Möller so to the middle discharge opening in the bottom 2 as well to the screw conveyors 3 that practically the whole Möller is carried out unhindered, that means that The occurrence of "dead men" is prevented.
  • the part of the Möllers reaches in the embodiment according to FIGS. 1 and 2 in the shaft 5 closed at the bottom To remove the material from this are immediate above the bottom of the shaft 5 two each other diametrically opposite discharge openings are provided, through which each also a screw conveyor 7 is passed through for discharge to a downpipe 8, which, for example, in the melter leads. Because the diameter of the shaft 5 is significant is smaller than that of the reduction shaft the screw conveyors 7 each over the middle of the Shaft 5 out, so that everyone in the shaft 5 entering Möller without stowage to the downpipes 8 is transported.
  • Discharge elements provided at the bottom of the shaft 5 be, for example, a rotary valve or a Bunker Anlagenr.
  • the outlet pipe 12 is centrally through a coal liner 13 in the head of a melter gasifier 14 guided.
  • the coal liner 13 comprises a vertical one Feed pipe from a coal bunker and a two-stage Screw conveyor. Because of the concentric Introduction of furniture material or sponge iron and Coal in the head of the melter 14 is the Mixing promoted by this, so that Melting the sponge iron and generating the Reducing gas in the melter 14 improved become.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Iron (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Screw Conveyors (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Compounds Of Iron (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

A device for producing sponge iron from iron oxide lumps consists of a reduction shaft in which a hot dust laden reducing gas is delivered. The gas is produced in a gas generator by means of partial oxidation of solid carbon carriers and passes into the lower end of the reduction zone via lateral reduction gas inlets. The iron oxide lumps are fed to the upper area of the reduction shaft and are radially fed as sponge iron to the lower end of said reduction shaft via delivery organs. The delivery organs are arranged in such a manner that the sponge iron is conveyed only radially outwardly.

Description

Die Erfindung betrifft ein Verfahren nach dem Oberbegriff des Anspruchs 1.The invention relates to a method according to the preamble of claim 1.

Bei der Reduktion von stückigen Eisenoxiden in einem Reduktionsschacht wird der erzeugte Eisenschwamm im unteren Teil des Reduktionsschachtes aus diesem ausgetragen. Eine in der EP 0 085 290 A1 beschriebene Möglichkeit dieses Austragens besteht darin, daß der Eisenschwamm mittels radial wirkende Austragorgane, insbesondere Förderschnecken, seitlich aus dem Reduktionsschachtofen abgeführt wird. Durch die radiale Anordnung der Förderschnecken bestehen zwischen diesen seitliche Zwischenräume (tote Flächen), die sich zur Innenwand des Reduktionsschachtes hin erweitern. Auf diesen Zwischenraumflächen bauen sich unbewegte Zonen des durch den Schacht nach unten bewegten Möllers, sogenannte "tote Männer" auf. Weiterhin ist es problematisch, die Austragorgane aus Festigkeitsgründen hinsichtlich ihres Durchmessers und ihrer Länge beliebig groß zu machen, so daß normalerweise auch in der Mitte des Reduktionsschachtes zwischen den inneren Enden der Austragorgane (Schneckenköpfen) eine tote Fläche besteht, auf der sich ebenfalls ein "toter Mann" (zentraler "toter Mann") aufbaut. Die Höhe dieser "toten Männer" ist abhängig von der Größe der jeweiligen Zwischenraumfläche und dem Schüttwinkel der Möllerschüttung. Insbesondere bei höheren Verstaubungen aufgrund des Staubgehaltes des Reduktionsgases ist dieser Schüttwinkel sehr steil und die innere Reibung sehr hoch. Dabei können sich die über den Zwischenraumflächen der Förderschnecken gebildeten "toten Männer" und der zentrale "tote Mann" gegenseitig abstützen. Die "toten Männer" haben einen potentiell schädlichen Einfluß auf die Gleichmäßigkeit der Durchgasung des Möllers sowie der Möllerbewegung im Schacht und damit auf die Gleichmäßigkeit der Reduktion der Eisenoxide.When reducing lumpy iron oxides in one The iron sponge generated in the reduction shaft lower part of the reduction shaft discharged from this. One described in EP 0 085 290 A1 The possibility of this discharge is that the Sponge iron by means of radially acting discharge elements, especially screw conveyors, from the side of the reduction shaft furnace is dissipated. By the radial Arrangement of the screw conveyor exist between these lateral spaces (dead areas), which are extend towards the inner wall of the reduction shaft. Immobile are built on these spaces Zones of the miller moving down through the shaft, so-called "dead men". Furthermore it is problematic, the discharge organs for reasons of strength in terms of their diameter and length to make any size, so that usually also in the middle of the reduction shaft between the inner ones Ends of the discharge elements (snail heads) one there is a dead surface on which there is also a "dead Man "(central" dead man "). The height these "dead men" depends on the size of the respective space and the angle of repose the dump of rubble. Especially with higher dust levels due to the dust content of the reducing gas this angle of repose is very steep and the inner one Very high friction. The can over the interspace surfaces of the screw conveyors "dead men" and the central "dead man" each other support. The "dead men" have one potentially harmful influence on uniformity the gassing of the Moller and the Moller movement in the shaft and thus on the evenness the reduction of iron oxides.

Die EP 0 166 679 A1 offenbart eine Anordnung aus einem Einschmelzvergaser und einem Direktreduktionsschachtofen mit einer Schüttung aus stückigem Eisenoxid, bei der der Schachtofen einen Boden zum Abstützen der Schüttsäule, Austragöffnungen im Boden zum Austrag der Eisenschwammpartikel sowie zumindest einen Einlaß für das vom Vergaser gelieferte Reduktionsgas in den unteren Abschnitt der Schüttsäule aufweist. Da das Reduktionsgas sehr staubbeladen ist, besteht die Gefahr einer Verstopfung der freien Zwischenräume in der Schüttsäule mit der Folge einer entsprechenden Erhöhung des Durchgangswiderstandes für das Reduktionsgas. Um zu ermöglichen, daß auch ein mit einem größeren Staubanteil beladenes Gas aus dem Vergaser dem Reduktionsschachtofen direkt zugeführt werden kann, ohne daß es zu einem Zusetzen der Zwischenräume der Schüttsäule und als Folge hiervon zu einer ungleichmäßigen Gasverteilung im Schachtofen und damit zu Betriebsstörungen kommt, sind radial angeordnete Förderschnecken vorgesehen zur ständigen gegenseitigen hin- und hergehenden Bewegung der Partikel der Schüttung im an den Einlaß für das Reduktionsgas angrenzenden, vom Reduktionsgas durchströmten Bereich, und weiterhin ist an den entgegengesetzten Enden der Förderschnecken im Boden jeweils mindestens eine Austragöffnung für die Eisenschwammpartikel angeordnet. Der Antrieb der Förderschnecken kann derart erfolgen, daß entweder die einzelnen Schnecken aufeinanderfolgend in beiden Richtungen gedreht werden oder eine Kombination von ständig nach außen und ständig nach innen fördernden Schnecken vorgesehen ist.EP 0 166 679 A1 discloses an arrangement of one Smelting gasifier and a direct reduction shaft furnace with a bed of lumpy iron oxide, where the shaft furnace has a floor to support the pouring column, discharge openings in the floor for Discharge of the iron sponge particles and at least one Inlet for the reducing gas supplied by the carburetor in the lower section of the pouring column. Since the reducing gas is very dust-laden, there is a risk of blockage of the free spaces in the column with the consequence of a corresponding increase in volume resistance for the reducing gas. To enable that too a gas loaded with a larger proportion of dust fed directly to the carburetor of the reduction shaft furnace can be without clogging the Gaps in the column and as a result to an uneven gas distribution in the shaft furnace and thus malfunctions are radially arranged Screw conveyors are intended for permanent mutual reciprocating movement of the particles the bed in the inlet for the reducing gas adjacent, through which the reducing gas flows Area, and continues to be at the opposite At least ends of the screw conveyors in the ground a discharge opening for the sponge iron particles is arranged. The screw conveyors can be driven in this way done that either the individual snails in succession rotated in both directions or a combination of constantly outward and snails continuously conveying inside is.

Beide Austragöffnungen sind bei dieser Anordnung gegenüber der Schüttsäule abgeschirmt; die äußere durch eine Ringschürze und die innere durch einen Kegel. Der Kegel endet kurz oberhalb der Förderschnecken oder er enthält Durchtrittsöffnungen, in die die inneren Enden der radial angeordneten Schnecken greifen. Hierdurch wird sichergestellt, daß der Eisenschwamm nicht direkt, d.h. ohne zusätzliche Förderorgane zu den Austragöffnungen gelangt, sondern nur mittels der Förderschnecken zu diesen transportiert werden kann. Dies ist erforderlich, um die hin- und hergehende Bewegung des Eisenschwamms zu erzeugen.Both discharge openings are opposite in this arrangement shielded the pouring column; the outer through a ring apron and the inner one by a cone. The cone ends just above the screw conveyor or it contains passage openings into which the inner ones Grip the ends of the radially arranged screws. This ensures that the sponge iron not directly, i.e. without additional funding bodies reaches the discharge openings, but only transported to these by means of the screw conveyors can be. This is necessary to the back and forth to produce the resulting movement of the sponge iron.

Da sich die Möllerschüttung auch auf dem die mittlere Austragöffnung abschirmenden Kegel abstützt, ist auch hier das Auftreten "toter Männer" wahrscheinlich.Since the bulk of the rubble is also on the middle Supporting the discharge opening shielding cone is also here the appearance of "dead men" probably.

Ausgehend von der EP 0 166 679 A1 ist es daher die Aufgabe der vorliegenden Erfindung, ein Verfahren zur Erzeugung von Eisenschwamm aus stückigen Eisenoxiden in einem Reduktionsschacht unter Verwendung eines heißen staubhaltigen Reduktionsgases, das in einem Gaserzeuger durch partielle Oxidation von festen Kohlenstoffträgern erzeugt und über seitliche Reduktionsgaseinlässe am unteren Ende der Reduktionszone in den Reduktionsschacht eingeleitet wird, bei der die stückigen Eisenoxide im oberen Bereich des Reduktionsschachtes eingegeben und als Eisenschwamm an dessen unterem Ende durch Austragorgane radial ausgetragen werden, und bei der im mittleren Bereich des Reduktionsschachtes unterhalb der zwischen den inneren Enden der Austragorgane gebildeten Fläche im Boden des Reduktionsschachtes eine zusätzliche Austragöffnung für den Eisenschwamm vorgesehen ist, zu schaffen, bei dem der Aufbau eines "toten Mannes" zumindest über der sich in der Mitte zwischen den radialen Austragorganen befindlichen Fläche vermieden wird.Starting from EP 0 166 679 A1, it is therefore the Object of the present invention, a method for the production of sponge iron from lumpy iron oxides using in a reduction shaft of a hot dusty reducing gas, which is in a gas generator by partial oxidation of solid Carbon carriers generated and over side Reduction gas inlets at the lower end of the reduction zone is introduced into the reduction shaft at of the lumpy iron oxides in the upper part of the Reduction shaft entered and as sponge iron radial at its lower end by discharge members be carried out, and in the middle range of the reduction shaft below that between the inner ends of the discharge organs formed surface in An additional discharge opening at the bottom of the reduction shaft is intended for the sponge iron, too create in which building a "dead man" at least above which is in the middle between the radial Discharge organs located area avoided becomes.

Diese Aufgabe wird erfindungsgemäß gelöst durch ein Verfahren mit den im Anspruch 1 angegebenen Merkmalen. Vorteilhafte Weiterbildungen des erfindungsgemäßen Verfahrens ergeben sich aus den Unteransprüchen.According to the invention, this object is achieved by a Method with the features specified in claim 1. Advantageous further developments of the invention Procedures result from the subclaims.

Dadurch, daß die Austragorgane den Eisenschwamm nur radial nach außen fördern, findet keine hin- und hergehende Bewegung des Eisenschwamms auf dem Boden des Reduktionsschachtes statt und die mittlere Austragöffnung braucht nicht abgeschirmt zu werden, so daß sich keine "toten Männer" mehr in der Mitte und im wesentlichen auch seitlich zwischen den Austragorganen ausbilden können. Da auch das über den seitlichen Flächen befindliche Möllermaterial sich nicht mehr am zentralen "toten Mann" abstützen kann, wird es beim Absinken im Reduktionsschacht zu einem erheblichen Teil zu der zusätzlichen Austragöffnung hin gelenkt.The fact that the discharge organs only the sponge iron Convey radially outwards, finds no reciprocating Movement of the sponge iron on the bottom of the Reduction shaft instead and the middle discharge opening need not be shielded, so that no more "dead men" in the middle and in the essentially also laterally between the discharge elements can train. Since that too over the side Surface furniture material is no longer on central "dead man", it will be with the Sink in the reduction shaft to a significant Part directed to the additional discharge opening.

Vorteilhaft wird der nach unten sinkende Eisenschwamm durch eine zwischen jeweils zwei Austragorganen angeordnete und nach oben über diese hinausragende Leiteinrichtung seitlich zu den Austragorganen und radial zu der zusätzlichen Austragöffnung gelenkt. Hierdurch wird eine verstärkte Lenkung des Möllermaterials zu den Austragorganen und der zusätzlichen Austragöffnung hin erreicht.The iron sponge sinking downwards is advantageous by one arranged between two discharge elements and rising above this Guide device to the side of the discharge elements and directed radially to the additional discharge opening. This increases the steering of the furniture material to the discharge organs and the additional Discharge opening reached.

Vorzugsweise wird eine Leiteinrichtung mit einer vom Rand der zusätzlichen Austragöffnung schräg nach oben bis zur Innenwand des Reduktionsschachtes verlaufenden oberen Kante verwendet, wobei sich die Leiteinrichtung nach unten und radial nach außen bis zur Breite des seitlichen Zwischenraums zwischen den Austragorganen erweitern kann. Hierdurch ist sichergestellt, daß das gesamte Möllermaterial gleichmäßig nach unten sinkt, bis es ausgetragen wird.Preferably, a guide device with a Edge of the additional discharge opening diagonally upwards extending to the inner wall of the reduction shaft used upper edge, with the guide device downwards and radially outwards to Width of the lateral space can expand between the discharge organs. This ensures that the entire furniture material evenly sinks down until it's discharged becomes.

Durch die Teilung des Abzugs in einen Außen- und Zentrumsbereich kann die Absinkgeschwindigkeit im Bereich des Schacht-Außendurchmessers und im Bereich über dem Mittenaustrag unabhängig voneinander gesteuert werden. Somit ist - in Verbindung mit den individuell einstellbaren Austragsgeschwindigkeiten der Austragorgane - eine gezielte Steuerung des Schachtganges über den gesamten Schachtquerschnitt möglich.By dividing the deduction into an outer and center area the rate of descent in the range of the shaft outside diameter and in the area Controlled independently of each other via the center discharge become. Thus - in connection with the individual adjustable discharge speeds of the Discharge devices - targeted control of the shaft aisle possible across the entire shaft cross-section.

Vorteilhaft wird ein Reduktionsschacht mit einem sich unterhalb der zusätzlichen Austragöffnung befindenden Schacht mit gleichbleibendem oder sich nach unten hin verjüngendem oder erweiterndem Durchmesser, dessen unteres Ende verschlossen ist und in welchem oberhalb des Bodens mindestens ein weiteres radial wirkendes Austragorgan für den Eisenschwamm angeordnet ist, verwendet.A reduction shaft with one is advantageous located below the additional discharge opening Manhole with the same or down tapering or expanding diameter whose lower end is closed and in which above of the bottom at least one other radially acting Discharge device for the sponge iron is arranged, used.

Die Erfindung wird im folgenden anhand von in den Figuren dargestellten Ausführungsbeispielen näher erläutert. Es zeigen:

Fig. 1
den unteren Teil eines Reduktionsschachtes in senkrechter Schnittdarstellung gemäß einem ersten Ausführungsbeispiel,
Fig. 2
einen horizontalen Schnitt durch den Reduktionsschachtofen in der Ebene II-II in Fig. 1, und
Fig. 3
den unteren Teil eines Reduktionsschachtes in senkrechter Schnittdarstellung gemäß einem zweiten Ausführungsbeispiel.
The invention is explained in more detail below with reference to exemplary embodiments shown in the figures. Show it:
Fig. 1
the lower part of a reduction shaft in a vertical sectional view according to a first embodiment,
Fig. 2
a horizontal section through the reduction shaft furnace in the plane II-II in Fig. 1, and
Fig. 3
the lower part of a reduction shaft in a vertical sectional view according to a second embodiment.

Die Figuren zeigen den Teil des Reduktionsschachtes unterhalb der Bustleebene, das heißt der Ebene, in der das Reduktionsgas in den Schacht geblasen wird, um in diesem durch den Möller nach oben zu steigen und die Umwandlung der Eisenoxide in Eisenschwamm zu bewirken.The figures show the part of the reduction shaft below the bustle level, i.e. the level in which the reducing gas is blown into the shaft to climb up through the Möller and the conversion of iron oxides into sponge iron cause.

Der Reduktionsschacht weist einen zylindrischen oder bereichsweise konischen Mantel 1 auf, der am unteren Ende in den Boden 2 übergeht. Unmittelbar oberhalb des Bodens 2 befinden sich mehrere, beispielsweise zehn seitliche Austragöffnungen für den den Eisenschwamm enthaltenden Möller, die in gleichmäßigem Abstand in Umfangsrichtung entlang des Mantels 1 in einer horizontalen Ebene verteilt sind. Durch jede dieser Austragöffnungen ist ein Austragorgan in Form einer Förderschnecke 3 geführt. Die Förderschnecken 3 transportieren den auf den Boden 2 herabgesunkenen Möller radial nach außen, so daß er jeweils in ein Fallrohr 4 gelangt, durch welches er beispielsweise in einen das Reduktionsgas erzeugenden Einschmelzvergaser geführt wird. Dieser Mölleraustrag ermöglicht das Absinken des Möllers im Reduktionsschacht.The reduction shaft has a cylindrical or in areas conical jacket 1 on the bottom Ends in the ground 2. Immediately above of the bottom 2 there are several, for example ten side discharge openings for the iron sponge containing Möller, which in uniform Distance in the circumferential direction along the jacket 1 in are distributed on a horizontal plane. Through each this discharge opening is a discharge organ in the form a screw conveyor 3 out. The screw conveyors 3 transport the sunken to the floor 2 Möller radially outwards so that it is in each case Downpipe 4 passes through which it, for example into a melter gasifier generating the reducing gas to be led. This discharge of Möller enables the sinking of the furniture in the reduction shaft.

Die radialen Förderschnecken 3 erstrecken sich nur über einen Teil des Radius des Reduktionsschachtes, so daß die Schneckenköpfe einen Abstand von der Schachtachse aufweisen und eine Kreisfläche zwischen sich bilden. Der Boden 2 enthält eine dieser Kreisfläche entsprechende mittlere Austragöffnung, die in einen zylindrischen Schacht 5 mit gegenüber dem des Reduktionsschachtes entsprechend verringertem Durchmesser übergeht.The radial screw conveyors 3 only extend over part of the radius of the reduction shaft, so that the snail heads a distance from the Have shaft axis and a circular area between form. The bottom 2 contains one of these circular areas corresponding middle discharge opening, which in a cylindrical shaft 5 with respect to that of Reduction shaft corresponding to a reduced diameter transforms.

Oberhalb des Bodens 2 befindet sich zwischen jeweils zwei Förderschnecken 3 ein keilförmiges Leitelement 6. Die vordere bzw. obere Kante der Leitelemente erstreckt sich vom Rand der mittleren Austragöffnung nach oben ansteigend bis zur Innenwand des Mantels 1, wobei der Steigungswinkel dieser Kante gegenüber der Vertikalen etwa 25 bis 40° beträgt. Weiterhin erweitern sich die Leitelemente 6 von dieser Kante ausgehend nach unten und radial nach außen, so daß ihre auf dem Boden aufliegende Fläche jeweils der toten Fläche zwischen zwei Förderschnecken 3 entspricht. Der Neigungswinkel der Seitenflächen der Leitelemente 6 liegt etwa im Bereich von 5 bis 15°.Above the bottom 2 is between each two screw conveyors 3 a wedge-shaped guide element 6. The front or upper edge of the guide elements extends from the edge of the middle discharge opening rising up to the inner wall of the jacket 1, the slope angle of this edge compared to the Vertical is about 25 to 40 °. Continue to expand the guide elements 6 starting from this edge downward and radially outward so that their surface of the dead lying on the ground Area between two screw conveyors 3 corresponds. The angle of inclination of the side surfaces of the guide elements 6 is approximately in the range of 5 to 15 °.

Die Leitelemente 6 lenken den herabsinkenden Möller so zu der mittleren Austragöffnung im Boden 2 sowie zu den Förderschnecken 3, daß praktisch der gesamte Möller ungehindert ausgetragen wird, das heißt das Auftreten "toter Männer" unterbunden wird.The guide elements 6 guide the sinking Möller so to the middle discharge opening in the bottom 2 as well to the screw conveyors 3 that practically the whole Möller is carried out unhindered, that means that The occurrence of "dead men" is prevented.

Der die mittlere Austragöffnung passierende Teil des Möllers gelangt bei der Ausführung nach den Fig. 1 und 2 in den unten geschlossenen Schacht 5. Um das Material aus diesem auszutragen, sind unmittelbar über dem Boden des Schachtes 5 zwei einander diametral gegenüberliegende Austragöffnungen vorgesehen, durch welche ebenfalls je eine Förderschnecke 7 hindurchgeführt ist für den Austrag zu einem Fallrohr 8, das auch beispielsweise in den Einschmelzvergaser führt. Da der Durchmesser des Schachtes 5 bedeutend kleiner als der des Reduktionsschachtes ist, ragen die Förderschnecken 7 jeweils über die Mitte des Schachtes 5 hinaus, so daß sämtlicher in den Schacht 5 eintretender Möller ohne Stauung zu den Fallrohren 8 transportiert wird.The part of the Möllers reaches in the embodiment according to FIGS. 1 and 2 in the shaft 5 closed at the bottom To remove the material from this are immediate above the bottom of the shaft 5 two each other diametrically opposite discharge openings are provided, through which each also a screw conveyor 7 is passed through for discharge to a downpipe 8, which, for example, in the melter leads. Because the diameter of the shaft 5 is significant is smaller than that of the reduction shaft the screw conveyors 7 each over the middle of the Shaft 5 out, so that everyone in the shaft 5 entering Möller without stowage to the downpipes 8 is transported.

Anstelle der Förderschnecken 8 können auch andere Austragorgane am Boden des Schachtes 5 vorgesehen sein, beispielsweise eine Zellenradschleuse oder ein Bunkerräumer.Instead of the screw conveyor 8, others can Discharge elements provided at the bottom of the shaft 5 be, for example, a rotary valve or a Bunkerräumer.

Bei dem Reduktionsschacht nach Fig. 3 schließt sich an die mittlere Austragöffnung im Boden 2 ein Schacht 9 an, dessen Innendurchmesser nach unten hin stetig abnimmt und am unteren Ende etwa 1 m oder weniger beträgt. Das untere Ende des Schachtes 9 ist offen, so daß der Möller aus diesem austreten kann. Er fällt auf einen Hubbalken 10, der sich in einer Kammer 11 mit einem Auslaufrohr 12 befindet. Der Hubbalken 10 führt in Abhängigkeit von der Menge des aus dem Schacht 9 ausgetretenen Möllers Schwenkbewegungen durch und bewirkt eine diskontinuierliche Abgabe von diesem an das Auslaufrohr 12.3 closes a shaft at the middle discharge opening in floor 2 9, whose inner diameter is steadily downwards decreases and at the lower end about 1 m or less is. The lower end of the shaft 9 is open, so that the Möller can emerge from it. He falls on a walking beam 10, which is in a chamber 11 is located with an outlet pipe 12. The walking beam 10 leads depending on the amount of from the Shaft 9 exited Möllers swivel movements through and causes a discontinuous release of this to the outlet pipe 12.

Das Auslaufrohr 12 wird zentral durch einen Kohleinliner 13 in den Kopf eines Einschmelzvergasers 14 geführt. Der Kohleinliner 13 umfaßt ein vertikales Zuführungsrohr von einem Kohlebunker und einen zweistufigen Schneckenförderer. Durch die konzentrische Einbringung von Möllermaterial bzw. Eisenschwamm und Kohle in den Kopf des Einschmelzvergasers 14 wird die Durchmischung von diesem gefördert, so daß das Schmelzen des Eisenschwamms und die Erzeugung des Reduktionsgases im Einschmelzvergaser 14 verbessert werden.The outlet pipe 12 is centrally through a coal liner 13 in the head of a melter gasifier 14 guided. The coal liner 13 comprises a vertical one Feed pipe from a coal bunker and a two-stage Screw conveyor. Because of the concentric Introduction of furniture material or sponge iron and Coal in the head of the melter 14 is the Mixing promoted by this, so that Melting the sponge iron and generating the Reducing gas in the melter 14 improved become.

Claims (13)

  1. Process for producing sponge iron from iron oxide lumps in a reduction shaft, using a hot dust laden reduction gas which is produced in a gas generator (14) by partial oxidation of solid carbon carriers and introduced via lateral reduction gas inlets at the lower end of the reduction zone into the reduction shaft, and where the iron oxide lumps are fed into the upper area of the reduction shaft and radially delivered at its lower end by delivery organs (3) as sponge iron, and in which an additional delivery opening for sponge iron is provided in the central area of the reduction shaft below the surface formed between the inner ends of the delivery organs (3) in the base of the reduction shaft, characterised in that the delivery organs (3) convey sponge iron only radially outward.
  2. Process according to Claim 1, characterised in that the downward sinking sponge iron is diverted laterally to the delivery organs (3) and radially to the additional delivery opening by a guiding device (6) arranged between two respective delivery organs (3) and upwardly protruding over the latter.
  3. Process according to Claim 1 or 2, characterised in that screw conveyers (3) are used as delivery organs.
  4. Process according to one of Claims 1 to 3, characterised in that a guiding device (6) is used the upper edge of which extends from the edge of the additional delivery opening at a slant upward to the inside wall of the reduction shaft.
  5. Process according to Claim 4, characterised in that a guiding device (6) with an inclination angle of the upper edge of between approximately 25 and 40° relative to the vertical is used.
  6. Process according to one of Claims 1 to 5, characterised in that a guiding device (6) is used which extends downward and radially outward up to the width of the lateral intermediate space between the delivery organs (3).
  7. Process according to Claim 6, characterised in that a guiding device (6) is used which as an inclination angle of its lateral surfaces of between approximately 5 and 30° relative to the vertical.
  8. Process according to one of Claims 1 to 7, characterised in that a reduction shaft is used which has a shaft (5) located below the additional delivery opening with downwardly narrowing, unchanging or increasing diameter, the lower end of which is sealed and wherein above the base is arranged at least one further radially operational delivery organ (7) for sponge iron.
  9. Process according to Claim 8, characterised in that a screw conveyer (7) is used as an additional delivery organ.
  10. Process according to Claim 8, characterised in that a rotary-vane feeder is used as additional delivery organ.
  11. Process according to Claim 8, characterised in that a bunker clearing device is used as additional delivery organ.
  12. Process according to one of Claims 1 to 7, characterised in that a reduction shaft is used which has a vertical shaft (9) located below the additional delivery opening and with downwardly decreasing diameter, which has at the lower end a delivery opening for sponge iron and terminates in a chamber (11) with delivery pipe (12) in which a lifting beam (10) is provided below the delivery opening at the lower end of the shaft (9).
  13. Process according to Claim 12, characterised in that a delivery pipe (12) is used which is ducted through the delivery pipe (13) for delivery of solid carbon carriers into the gas generator (14).
EP98951258A 1997-09-02 1998-08-26 Process for producing sponge iron Expired - Lifetime EP1017859B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19739443 1997-09-02
DE19739443A DE19739443C2 (en) 1997-09-02 1997-09-02 Device for producing sponge iron
PCT/DE1998/002581 WO1999011825A1 (en) 1997-09-02 1998-08-26 Device for producing sponge iron

Publications (2)

Publication Number Publication Date
EP1017859A1 EP1017859A1 (en) 2000-07-12
EP1017859B1 true EP1017859B1 (en) 2002-05-08

Family

ID=7841697

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98951258A Expired - Lifetime EP1017859B1 (en) 1997-09-02 1998-08-26 Process for producing sponge iron

Country Status (17)

Country Link
US (1) US6391249B1 (en)
EP (1) EP1017859B1 (en)
JP (1) JP2001515137A (en)
KR (1) KR100563963B1 (en)
CN (1) CN1080316C (en)
AT (1) ATE217352T1 (en)
AU (1) AU748791B2 (en)
BR (1) BR9811435A (en)
CA (1) CA2301266A1 (en)
DE (2) DE19739443C2 (en)
ID (1) ID25550A (en)
PL (1) PL338798A1 (en)
SK (1) SK2892000A3 (en)
TR (1) TR200000572T2 (en)
TW (1) TW426740B (en)
WO (1) WO1999011825A1 (en)
ZA (1) ZA987742B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008026835A1 (en) 2008-06-05 2009-12-17 Kurt Himmelfreundpointner Conveyable material e.g. foam particle feeding method for shaft furnace in cement production, involves conveying air or gas into starting region of lance through mechanical conveyor operating at zero pressure
CN102032789B (en) * 2008-11-26 2012-09-12 中冶焦耐工程技术有限公司 Using method of closed-type discharging device
WO2011001282A2 (en) 2009-06-29 2011-01-06 Bairong Li Metal reduction processes, metallurgical processes and products and apparatus
KR101752606B1 (en) 2016-09-28 2017-07-11 (주)파인스 Screw conveyor apparatus for reduction furnace work of finex factory

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US681609A (en) * 1900-03-19 1901-08-27 Gen Metal Reduction Company Ltd Process of treating zinc-bearing complex ores.
DE2312538A1 (en) 1973-03-14 1974-09-19 Peter Dipl Ing Knoch Shaft furnace with ring-shaped hearth - reducing gas is injected from both bore and periphery
SU1129239A1 (en) * 1982-04-26 1984-12-15 Химико-металлургический институт АН КазССР Apparatus for thermochemical treatment of bulk materials with gas flow
DE3422185A1 (en) * 1984-06-12 1985-12-12 Korf Engineering GmbH, 4000 Düsseldorf ARRANGEMENT FROM A CARBURETTOR AND DIRECT REDUCTION STOVE
AT387037B (en) * 1987-06-15 1988-11-25 Voest Alpine Ag Shaft furnace for the heat treatment of charge materials with gaseous media
DE19623246C1 (en) * 1996-05-30 1997-10-02 Voest Alpine Ind Anlagen Loading of melting gasifier with gasifying agents and sponge iron@

Also Published As

Publication number Publication date
PL338798A1 (en) 2000-11-20
BR9811435A (en) 2000-08-22
TW426740B (en) 2001-03-21
DE19739443C2 (en) 2000-02-10
AU748791B2 (en) 2002-06-13
SK2892000A3 (en) 2000-09-12
CN1080316C (en) 2002-03-06
US6391249B1 (en) 2002-05-21
DE59804077D1 (en) 2002-06-13
DE19739443A1 (en) 1999-03-04
ATE217352T1 (en) 2002-05-15
CN1269839A (en) 2000-10-11
KR100563963B1 (en) 2006-03-29
ID25550A (en) 2000-10-12
ZA987742B (en) 1998-11-26
EP1017859A1 (en) 2000-07-12
TR200000572T2 (en) 2000-11-21
WO1999011825A1 (en) 1999-03-11
CA2301266A1 (en) 1999-03-11
JP2001515137A (en) 2001-09-18
AU9736098A (en) 1999-03-22
KR20010023482A (en) 2001-03-26

Similar Documents

Publication Publication Date Title
DE3422185C2 (en)
DE102007028438B4 (en) Gas nozzle and reactor hereby
DE3010499A1 (en) LARGE-ROOM SILO FOR THE STORAGE AND HOMOGENIZATION OF MOLD-SHAPED GOODS
DE2622968A1 (en) DEVICE FOR SEPARATING MATERIALS
EP1017859B1 (en) Process for producing sponge iron
AT405332B (en) SHAFT OVEN
EP0297408A2 (en) Process for the thermal decomposition of waste materials, and fluidized-bed reactor for carrying out the process
DE1458762A1 (en) Shaft furnace for the direct reduction of iron ore
DD274449A5 (en) APPARATUS FOR SUBMITTING A FILLING GASER WITH GASOLANTS AND IRON SPONGE
DE2557176B2 (en) Device for charging electric melting furnaces
DE2500923A1 (en) LOADING DEVICE FOR BILT FURNACE
EP1029088B1 (en) Withdrawal device for a shaft furnace
WO1998046953A1 (en) Device for charging a rotary furnace
DE602004003026T2 (en) METHOD AND DEVICE FOR FEEDING FUNNELS
DE1767913A1 (en) Device for simultaneous drying, shredding and sorting of grainy materials
AT405765B (en) DEVICE FOR DISCHARGING PIECE OF GOODS
DE3624885A1 (en) EMPTYING DEVICE FOR A SCHUETTGUT-SILO
EP0088207B1 (en) Cooling bunker for the dry quenching of coke
AT407192B (en) SHAFT OVEN
DE3024567A1 (en) Trough for pneumatic transport of powdery material - has conveyor trough separated from air supply and outlet ducts by air permeable webs below and above trough
DE757373C (en) Loading device
WO1979000794A1 (en) Heating by turbulent fluidized bed
DE803365C (en) Muzzle chute for fuel feed devices
DE3743007A1 (en) METHOD FOR THE DIRECT REDUCTION OF IRON OXYGEN-CONTAINING MATERIALS IN THE ROTATING THREAD
DE1209503B (en) Device for discharging lumpy goods from cylindrical containers or pots

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

17P Request for examination filed

Effective date: 20000215

AK Designated contracting states

Kind code of ref document: A1

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

17Q First examination report despatched

Effective date: 20010307

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

RTI1 Title (correction)

Free format text: PROCESS FOR PRODUCING SPONGE IRON

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

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

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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20020508

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;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: 20020508

Ref country code: GB

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20020508

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20020508

REF Corresponds to:

Ref document number: 217352

Country of ref document: AT

Date of ref document: 20020515

Kind code of ref document: T

REF Corresponds to:

Ref document number: 59804077

Country of ref document: DE

Date of ref document: 20020613

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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20020808

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: 20020831

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 20020508

EN Fr: translation not filed
BERE Be: lapsed

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

Effective date: 20020831

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

Effective date: 20020831

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

Effective date: 20030211

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

Ref country code: LU

Payment date: 20080813

Year of fee payment: 11

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

Ref country code: DE

Payment date: 20101018

Year of fee payment: 13

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

Ref country code: LU

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

Effective date: 20090826

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

Ref country code: AT

Payment date: 20110712

Year of fee payment: 14

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 217352

Country of ref document: AT

Kind code of ref document: T

Effective date: 20120826

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

Ref country code: AT

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

Effective date: 20120826

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

Ref country code: DE

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

Effective date: 20130301

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59804077

Country of ref document: DE

Effective date: 20130301