EP2761036A2 - Procédé et dispositif de production de fonte brute - Google Patents

Procédé et dispositif de production de fonte brute

Info

Publication number
EP2761036A2
EP2761036A2 EP12761570.6A EP12761570A EP2761036A2 EP 2761036 A2 EP2761036 A2 EP 2761036A2 EP 12761570 A EP12761570 A EP 12761570A EP 2761036 A2 EP2761036 A2 EP 2761036A2
Authority
EP
European Patent Office
Prior art keywords
gas
reduction shaft
reduction
pressure
melter gasifier
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.)
Withdrawn
Application number
EP12761570.6A
Other languages
German (de)
English (en)
Inventor
Hado Heckmann
Robert Millner
Gerald Rosenfellner
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
Original Assignee
Siemens VAI Metals Technologies GmbH Austria
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 Siemens VAI Metals Technologies GmbH Austria filed Critical Siemens VAI Metals Technologies GmbH Austria
Publication of EP2761036A2 publication Critical patent/EP2761036A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B15/00—Other processes for the manufacture of iron from iron compounds
    • 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0073—Selection or treatment of the reducing gases
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/60—Process control or energy utilisation in the manufacture of iron or steel
    • C21B2100/64—Controlling the physical properties of the gas, e.g. pressure or temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/10—Reduction of greenhouse gas [GHG] emissions
    • Y02P10/122—Reduction of greenhouse gas [GHG] emissions by capturing or storing CO2

Definitions

  • the invention relates to a process for the reduction of iron oxide-containing material, wherein the iron oxide-containing
  • Material forms a fixed bed in a reduction shaft, and introduced it in the reduction shaft by means of at least one with a pressure pl in the fixed bed
  • Reduction shaft is introduced into a melter gasifier, in which it is finished reduced by means of a standing under a pressure p2 reducing gas.
  • the invention relates to a device for
  • Pre-reduced material is converted.
  • the prereduced material is then introduced into a melter gasifier in which a reducing gas causes further reduction.
  • a reducing gas causes further reduction.
  • Vorreduktionsgas carried out with the iron oxide-containing material, or with the Moellerzugabe also necessary for the Vorreduktions- and reduction reactions in the reduction shaft. Can arise dusty material in the
  • Reduction shaft for example by abrasion
  • Pre-reducing gas deposited in certain areas of the fixed bed of iron oxide-containing material and prereduced material Such dust deposits obstruct gas flows, so that it is well-gassed, less well-gassed and virtually non-gassed zones in the fixed bed. The worse a zone of pre-reduction gas is through, the less well reduction processes can proceed in it. Accordingly, the dust affects the
  • Material in the melter gasifier serve - dust from the melter gasifier through in the direction of the reduction shaft flowing gas streams is introduced into the reduction shaft, and on the other hand prevent the flowing over the downpipes in the direction of the reduction shaft gas streams dusts from the reduction shaft via the downpipes in the direction
  • the dusts deposited in the lower part tend to agglomerate.
  • the dusts introduced through the downpipes have a high agglomeration tendency due to their contents of alkalis or low-melting alkali-containing slag phases.
  • the dusts introduced into the reduction shaft via the addition of Möller and the dusts resulting from attrition and / or decomposition in the reduction shaft tend - in particular in slightly moving deposition zones - due to the formation of very fine crystals of metallic iron and / or wustite and their entanglement under the prevailing reduction conditions also for the education of
  • Agglomerates Agglomeration of dusts present in gaps of the fixed bed results in solidification of the fixed bed with formation of material bridges. There may be solidified areas that slipping from
  • a process for the reduction of iron oxide-containing material wherein the iron oxide-containing material forms a fixed bed in a reduction shaft, and in the reduction shaft by means of at least one with a pressure pl in the fixed bed
  • Material is converted into vorredu convertedes material, and at least a portion of this pre-reduced material, preferably the entire prereduced material from the
  • Reduction shaft is introduced into a melter gasifier, in which it is finished by means of a standing under a pressure p2 reducing gas,
  • At least one dust blow-off gas is discharged from the fixed bed at a pressure p4 from the reduction shaft, and the relationship pl> p4 and pl> p3, preferably also p4> p3, applies.
  • Reduction degree of greater than 70% preferably greater than 80%, more preferably up to 90% or greater, most preferably up to 95%, wherein 90% and 95% are included with these formulations.
  • finish reducing is meant a degree of reduction of more than 95%, preferably 98% or higher, more preferably 99% or higher.
  • the degree of reduction after the "prereduction” is always smaller than after the "finish reduction”, ie there are two reduction steps.
  • Topgas is understood to be the pre-reduction gas consumed after flowing through the fixed bed, which is discharged from the rum above the fixed bed of the reduction shaft.
  • dust is not only from the reduction shaft by means of the top gas
  • the ratio of the amounts of gas withdrawn as the top gas and the dust blowout gas can be adjusted.
  • At least part of the at least one dust blow-off gas is at least during one part
  • the dust is together with the pre-reduced material directly or indirectly in the melter gasifier
  • the relationship p4> p2 applies. Especially if
  • Dust exhaust gas is passed together with prereduced material in the direction of the melter gasifier, thereby the introduction of dust from the melter gasifier is avoided in the reduction shaft by standing under p2 reducing gas.
  • the relationship p2> p4 is brought in one or more stages under an intermediate gas pressure pZ before or while the prereduced material in the melter gasifier
  • pZ is a few mbar higher than p2.
  • the intermediate gas pressure pZ is increased from pZ-Sp4 to ⁇ - ⁇ 2.
  • Melt carburetor is introduced, before introduction into the melter gasifier in an intermediate container
  • a dust discharge gas having a dust discharge gas pressure p5 is withdrawn therebetween, and p5 ⁇ p4 and p5 ⁇ p2.
  • Ap zw is less than or equal to (p2 - p5)
  • Ap zw ensures that there is no short-circuiting flow between the dust discharge gas discharge line discharging the dust discharge gas and the melter gasifier which supplies a supply of reducing gas into the reduction reactor via the exhaust gas discharge line
  • the pre-reduced material is brought under the intermediate gas pressure pZ by the prereduced material in a
  • the prereduction gas can come from different sources.
  • it can come from an external gas source.
  • Under an external gas source is a gas source too
  • Pre-reduction of the iron oxide-containing material or to reduce the prereduced material take place.
  • These may be, for example, natural gas, refinery gases,
  • Coker gas or gases from coal gasification / degassing processes.
  • the prereduction gas can also come from internal gas sources.
  • An internal gas source is to be understood as meaning a gas source in which steps of the method according to the invention for prereduction of the iron oxide-containing material or for reduction of the prereduced material take place for providing the prereduction gas.
  • it can be a suitably treated top gas, wherein the treatment may include, for example, dedusting, CO 2 removal, heating, cooling, compression.
  • the treatment may include, for example, dedusting, CO 2 removal, heating, cooling, compression.
  • Another example is the use of in the
  • the reducing gas withdrawn from the melter gasifier is generally referred to by the term generator gas.
  • This generator gas can after appropriate treatment such as dedusting and cooling in the reduction shaft of the invention
  • the generator gas can be used in another reduction shaft for reduction, from which it can be deducted after fulfilling its reduction task and used after appropriate treatment analogous to the top gas. It is also possible to use mixtures of external and internal gas sources as prereduction gas.
  • two or more pre-reducing gases which are different from each other are introduced into the fixed bed, wherein for each two pre-reduction gases introduced directly adjacent horizontally, the pre-reduction gas introduced in each case has a higher pressure than the higher introduced one Vorreduktionsgas.
  • the higher pre-reduction gas flows towards the surface of the packed bed, while the deeper-introduced pre-reduction gas also flows in the opposite direction and accordingly discharges dust-blowing gas from regions of the
  • Vorreduktionsgase can be introduced with different reducing power at different locations in the reduction shaft. This allows better control of the
  • Another object of the present invention is a device for carrying out a device according to the invention
  • Einschmelzvergaser can, for example, one or more lines, intermediate container,
  • reduction shaft in the melter gasifier can also include, for example, pneumatic conveying lines or conveyor belts or downpipes.
  • the metering device can, for example, in the form of screw conveyors or
  • a melter gasifier is understood to mean a device in which introduced pre-reduced material is completely reduced and melted by means of a reduction gas obtained by gasification of carbon carriers with technically pure oxygen under a pressure of the reducing gas of from 3 to 5 bar absolute or higher and at a temperature of the reducing gas of about 900 to 2400 ° C - at the
  • the introduction system for introducing pre-reduced in the reduction shaft material in the Melter gasifier one or more lines with one or more intermediate tanks and optionally one or more pressure-lock devices.
  • Pressure transfer devices can also be connected to the
  • Discharge intermediate container by removing gas from it, which entrains dust.
  • This gas is called Staubaustragsgas in the context of this application.
  • FIG. 1 shows an embodiment of a device for carrying out a method according to the invention.
  • Figure 2 shows a preferred embodiment of a
  • FIG. 3 shows a further preferred embodiment of a device for carrying out a method according to the invention
  • Figures 4a and 4b show an embodiment of a
  • FIG. 5 shows a further preferred embodiment of a device for carrying out a method according to the invention
  • Figure 1 shows an apparatus for performing a
  • This device comprises a reduction shaft 1, a prereduction gas supply line 2 opening into the reduction shaft 1, one of which
  • Pre-reduction gas supply line 2 is introduced into the fixed bed 7, is under a pressure pl.
  • the prereduction gas converts the iron oxide-containing material into prereduced material. Pre-reduced material is used over the
  • Delivery system 5 for introducing material prereduced in the reduction shaft 1 into the melter gasifier 4
  • Vorreduktionsgas is from the space above the fixed bed 7 as under a pressure p3 standing top gas from the
  • Staubausblasgasab Appendix 6 is a standing under a pressure p4 Staubausblasgas from the fixed bed 7 from the
  • the introduction system comprises the introduction of material prereduced in the reduction shaft into the material
  • Delivery system 5 for introducing material prereduced in the reduction shaft 1 into the melter gasifier 4
  • Material in the melter gasifier 4 comprises a
  • Intermediate container 11 Also shown is a material cushion made of prereduced material in the intermediate container 11. Between the upper end of the material cushion and the lower end of the material cushion prevails a pressure difference of Ap zw .
  • the intermediate container 11 is provided with a Staubaustragsgasabtechnisch 12. About this is by means of a standing under a pressure p5 Staubaustragsgases, represented by a corrugated arrow, dust from the intermediate container 11th
  • Dust-blowing gas represented by a straight arrow, is withdrawn standing under the pressure p4.
  • p5 ⁇ p4 and p5 ⁇ p2 we have
  • Dust exhaust gas discharge 6 Since the gas discharged by this dust discharge discharges the dust discharged from the dust discharge gas discharge line 6 and the dust discharge gas discharge line 12 in FIG
  • Reduction shaft 1 two prereduction gas supply lines 2a, 2b at different levels. Thereby can be
  • two reducing gases are introduced with different reduction potential, optionally with different pressure.
  • Pressure Locking devices comprises.
  • the prereduced material is brought under the intermediate gas pressure pZ, which prevails in the last intermediate tank 13 before the melter gasifier 4, by the pre-reduced material successively in several intermediate container 14,15 with
  • Pressure transfer devices 16,17 - represented by a pair of horizontal lines - is introduced.
  • Melt carburetor also includes part of the
  • Staubausblasgasab Let 6 go from the intermediate containers 14 and 15.
  • the purpose of the three intermediate tanks 13,14,15 is that in a first cycle (a) - shown in Figure 4a - prereduced material from the uppermost 14 intermediate tank is charged into the middle intermediate tank 15, wherein the material and gas flow between the middle
  • Pressure lock device 16 is locked and dust from the upper intermediate container 14 is sucked off via the dust exhaust gas outlet 6 emanating therefrom;
  • the upper intermediate container 14 is filled with prereduced material from the reduction shaft 1.
  • FIG. 5 schematically shows an embodiment in which the introduction system 5 for introducing material prereduced in the reduction shaft 1 into the melter gasifier 4 has a different construction than in the preceding figures. It comprises a hot conveyor device 18 with conveyor belt for conveying hot pre-reduced material under a protective gas atmosphere between two intermediate containers.
  • intermediate container under a certain pressure, for example, a gas in the intermediate container

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Manufacture Of Iron (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

L'invention concerne un procédé de réduction d'un matériau contenant de l'oxyde de fer, le matériau contenant de l'oxyde de fer formant dans un puits de réduction un lit fixe, et le matériau contenant de l'oxyde de fer étant converti dans le puits de réduction en matériau préréduit, au moyen d'au moins un gaz de préréduction introduit dans le lit fixe à une pression p1. Au moins une partie de ce matériau préréduit, de préférence la totalité de ce matériau préréduit, est introduite du puits de réduction dans un gazéificateur de fusion dans lequel il est entièrement réduit au moyen d'un gaz de réduction placé sous une pression p2. Un gaz supérieur est évacué du puits de réduction à une pression p3 de la chambre au-dessus du lit fixe, et au moins un gaz de soufflage de poussière est évacué à partir du lit fixe du puits de réduction à une pression p4. Les relations p1>p4 et p1>p3 s'appliquent dans ce cas, de préférence également p4>p3. L'invention concerne en outre un dispositif permettant de mettre en oeuvre un tel procédé.
EP12761570.6A 2011-09-30 2012-09-10 Procédé et dispositif de production de fonte brute Withdrawn EP2761036A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA1421/2011A AT512017B1 (de) 2011-09-30 2011-09-30 Verfahren und vorrichtung zur roheisenerzeugung
PCT/EP2012/067610 WO2013045260A2 (fr) 2011-09-30 2012-09-10 Procédé et dispositif de production de fonte brute

Publications (1)

Publication Number Publication Date
EP2761036A2 true EP2761036A2 (fr) 2014-08-06

Family

ID=46880684

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12761570.6A Withdrawn EP2761036A2 (fr) 2011-09-30 2012-09-10 Procédé et dispositif de production de fonte brute

Country Status (12)

Country Link
US (1) US9428818B2 (fr)
EP (1) EP2761036A2 (fr)
KR (1) KR20140090174A (fr)
CN (1) CN103842525B (fr)
AT (1) AT512017B1 (fr)
AU (1) AU2012314727A1 (fr)
BR (1) BR112014007560A2 (fr)
CA (1) CA2850393A1 (fr)
RU (1) RU2606135C2 (fr)
UA (1) UA113064C2 (fr)
WO (1) WO2013045260A2 (fr)
ZA (1) ZA201402204B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EA201600321A1 (ru) * 2015-03-13 2016-10-31 Сулейман Мустафьевич ТЛЕУГАБУЛОВ Способ восстановительной плавки стали и устройство для его осуществления
EP3150729A1 (fr) * 2015-10-02 2017-04-05 Primetals Technologies Austria GmbH Procede et dispositif de chargement de poutres en fer
EP3255157A1 (fr) * 2016-06-09 2017-12-13 Primetals Technologies Austria GmbH Procédé de réduction directe avec dépoussièrage des gaz évacués
CN112981030B (zh) * 2021-02-23 2022-10-14 中冶南方工程技术有限公司 一种还原竖炉

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DE4240197C2 (de) 1992-11-30 1996-04-18 Vuletic Bogdan Dipl Ing Verfahren zur Herstellung von Roheisen aus Eisenerzen und Vorrichtung zur thermischen und/oder chemischen Behandlung eines leicht zerfallenden Materials oder zur Herstellung von Roheisen mittels dieses Verfahrens
US5435831A (en) 1994-08-12 1995-07-25 Midrex International B.V. Rotterdam, Zurich Branch Circulating fluidizable bed co-processing of fines in a direct reduction system
AT406482B (de) 1995-07-19 2000-05-25 Voest Alpine Ind Anlagen Verfahren zur herstellung von flüssigem roheisen oder stahlvorprodukten und anlage zur durchführung des verfahrens
DE19623246C1 (de) 1996-05-30 1997-10-02 Voest Alpine Ind Anlagen Verfahren und Vorrichtung zur Beschickung eines Einschmelzvergasers mit Vergasungsmitteln und Eisenschwamm
AT405525B (de) 1996-06-28 1999-09-27 Voest Alpine Ind Anlagen Verfahren und anlage zum herstellen von flüssigem roheisen oder flüssigen stahlvorprodukten
AT404138B (de) 1996-10-08 1998-08-25 Voest Alpine Ind Anlagen Verfahren zur herstellung von flüssigem roheisen oder stahlvorprodukten sowie anlage zur durchführung des verfahrens
US6224649B1 (en) 1998-07-06 2001-05-01 Hylsa, S.A. De C.V. Method and apparatus for reducing iron-oxides-particles having a broad range of sizes
JP4352489B2 (ja) * 1998-12-09 2009-10-28 Ｊｆｅスチール株式会社 金属製錬炉の付着ダスト厚み検出装置及び付着ダスト除去方法
DE19859354A1 (de) * 1998-12-22 2000-07-06 Der Gruene Punkt Duales Syst Verfahren und Vorrichtung zur Erzeugung von Metall aus Metallerzen
AT409387B (de) 2000-06-28 2002-07-25 Voest Alpine Ind Anlagen Verfahren und anlage zur gasreduktion von teilchenförmigen oxidhältigen erzen
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Also Published As

Publication number Publication date
RU2606135C2 (ru) 2017-01-10
WO2013045260A3 (fr) 2013-06-27
AU2012314727A1 (en) 2014-04-24
CN103842525A (zh) 2014-06-04
US9428818B2 (en) 2016-08-30
WO2013045260A2 (fr) 2013-04-04
CA2850393A1 (fr) 2013-04-04
AT512017B1 (de) 2014-02-15
ZA201402204B (en) 2015-03-25
KR20140090174A (ko) 2014-07-16
UA113064C2 (xx) 2016-12-12
RU2014117375A (ru) 2015-11-10
CN103842525B (zh) 2015-11-25
BR112014007560A2 (pt) 2017-04-04
US20140224068A1 (en) 2014-08-14
AT512017A1 (de) 2013-04-15

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