EP1029092A1 - Procede pour produire du fer de reduction directe, de la fonte brute liquide et de l'acier - Google Patents

Procede pour produire du fer de reduction directe, de la fonte brute liquide et de l'acier

Info

Publication number
EP1029092A1
EP1029092A1 EP98954449A EP98954449A EP1029092A1 EP 1029092 A1 EP1029092 A1 EP 1029092A1 EP 98954449 A EP98954449 A EP 98954449A EP 98954449 A EP98954449 A EP 98954449A EP 1029092 A1 EP1029092 A1 EP 1029092A1
Authority
EP
European Patent Office
Prior art keywords
iron
reduction
gas
steel
sludge
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.)
Ceased
Application number
EP98954449A
Other languages
German (de)
English (en)
Inventor
Günter SCHREY
Herbert Grünbacher
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
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 EP1029092A1 publication Critical patent/EP1029092A1/fr
Ceased legal-status Critical Current

Links

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
    • 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
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/02—Working-up flue dust
    • 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
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/56—Manufacture of steel by other methods
    • 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
    • C21B2100/20—Increasing the gas reduction potential of recycled exhaust gases
    • C21B2100/28—Increasing the gas reduction potential of recycled exhaust gases by separation
    • C21B2100/282—Increasing the gas reduction potential of recycled exhaust gases by separation of carbon dioxide
    • 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
    • C21B2100/40—Gas purification of exhaust gases to be recirculated or used in other metallurgical processes
    • C21B2100/44—Removing particles, e.g. by scrubbing, dedusting
    • 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
    • Y02P10/134—Reduction of greenhouse gas [GHG] emissions by avoiding CO2, e.g. using hydrogen
    • 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
    • Y02P10/20—Recycling

Definitions

  • the invention relates to a process for the production of directly reduced iron, molten pig iron and steel, in which feedstocks formed by iron ore, preferably in bar and / or pellet form and optionally additives, are reduced directly to sponge iron in a first reduction zone, the sponge iron in a melting gasification zone with the addition of carbon and oxygen-containing gas to molten pig iron and a reducing gas is generated, which is introduced into the first reduction zone after exhaust gas purification, converted there and withdrawn as top gas, and wherein the top gas is subjected to exhaust gas purification, optionally a further reduction zone for direct reduction of Iron ore is fed to sponge iron and, after reaction with the iron ore, is extracted as an export gas and subjected to exhaust gas purification, and the liquid pig iron and, if appropriate, the sponge iron from the further reduction zone are used in a steel production ning process, preferably a steel manufacturing process that takes place according to an electric steel process, and the exhaust gases of the steel manufacturing process are subjected to cleaning, as well as
  • dusts and / or sludges are produced both during cleaning of the reducing gas from the meltdown gasification zone, the top gas from the first reduction zone, possibly the cleaning of the export gas from the further reduction zone, and also during cleaning of the exhaust gases from the steel manufacturing process Form as well as in metallic form and optionally contain coal dust.
  • These dusts and / or sludges represent waste or residual materials, the recycling of which is aimed for in the sense of waste-free smelter operation as well as for reasons of economy in the smelter industry.
  • a process for recycling iron in oxidic and / or iron in metallic form, as well as carbon-containing waste and residues is from AT-B-376.241 known.
  • solid particles from the reducing gas and from the top gas emerging from the direct reduction zone are separated in cyclones and the separated solids are mixed with binders, such as iron oxide dust, briquetted and fed exclusively to the meltdown gasification zone, the iron oxide dust coming from a top gas cleaning system, so that in the top gas cleaning system resulting solids can also be used.
  • WO 96/22950 discloses a method for utilizing dusts produced when iron ore is reduced with a reducing gas and separated as sludge in a scrubber, the sludge being dewatered and used as a starting material for cement production.
  • the invention aims to avoid the disadvantages known from the prior art and has as its object to provide a process for the production of sponge iron, liquid pig iron and steel, all the dusts and / or sludges of which are separated during exhaust gas purification are sent for further use.
  • the method according to the invention it should be possible with the method according to the invention to supply the separated dusts and / or sludges regardless of their composition, that is to say the exhaust gas from which they are separated, to various utilization options.
  • landfill occupancy which was previously required when recycling such dusts and / or sludges due to the content of heavy metal compounds, is to be avoided entirely.
  • This object is achieved in that the iron-containing dusts and / or sludges separated during the cleaning of the exhaust gases from the steelmaking process, together with others, in the exhaust gas cleaning of the reducing gas from the melting gasification zone, in the exhaust gas cleaning of the top gas from the first reduction zone and optionally in the exhaust gas cleaning of the export gas from the further reduction zone resulting dusts and / or sludges are agglomerated and the agglomerates for further use as input materials are supplied to iron-metallurgical melting and / or reduction processes and / or cement production and that produced cast iron and if necessary the sponge iron from the further reduction zone, as well as any dusts and / or sludges arising in the process, or agglomerates produced therefrom, as well as possibly own scrap form the exclusive ferrous starting materials of the steel manufacturing process.
  • the method according to the invention makes it possible for the first time to agglomerate all of the dusts and / or sludges separated in a combination of sponge iron production, pig iron production and steel production during exhaust gas purification, and to feed the resulting mixed agglomerate for further use. Since the only ferrous feedstocks in the steel manufacturing process are the product from the melting gasification zone, i.e. liquid pig iron, and possibly the product from a further reduction zone, i.e. iron sponge, the dusts and / or sludges separated during the exhaust gas cleaning of the steel manufacturing process are free of heavy metal components.
  • the top gas emerging from the first reduction zone, the export gas possibly emerging from the further reduction zone, and at least part of the reduction gas emerging from the meltdown gasification zone are advantageously subjected to a gas scrubbing and the sludge to be agglomerated in each case is further treated together. As a result, investment costs can be minimized.
  • the sludge to be agglomerated is first dewatered to a residual moisture content, as a result of which the volume of the sludge is reduced and the handling of the sludge is facilitated in subsequent processing steps.
  • the exhaust gases emerging from the steelmaking process are subjected to dry dedusting and the resulting dusts are further treated together with the dewatered sludges to be agglomerated.
  • the dewatered sludges to be agglomerated are mixed, preferably in a continuous two-stage process, with the dusts resulting from the dry dedusting of the steelmaking process, with further oxidic dusts, quicklime and optionally coal dust and then granulated.
  • the oxidic dusts expediently come from a plant for carrying out the process, for example, from the. product dedusting of the further reduction zone, and / or from the casting hall dedusting of a steel processing process downstream of a plant for carrying out the method.
  • the granules are expediently dried before their further use. This increases the strength of the granules and their thermal stability.
  • the agglomerates are advantageously recycled in a further steel production process, in particular in a process using an electric steel process or a process using the oxygen inflation process.
  • the agglomerates are expediently recycled by feeding them into the melting gasification zone and / or the first reduction zone. Due to their carbon content, the agglomerates in the melt-down gasification zone make a valuable energetic contribution.
  • the first reduction zone the proportion of oxidic iron is reduced to metallic iron or sponge iron, while the carbon portion of the agglomerates is partially converted into reducing gas and makes a valuable contribution to the quality of the top gas.
  • the agglomerates are recycled by feeding them to a blast furnace process. Because of the chemical composition of the agglomerates and because of the mechanical strength that can be achieved, they are excellent suitable to be used in a high grade process, the carbon content in turn making an energetic contribution.
  • the agglomerates are advantageously used as the starting material for cement production. Since the components of the cement material required for cement production, namely iron oxides, silicon oxide, aluminum oxide and calcium oxide, or calcium hydroxide are already contained in the agglomerates, these agglomerates can, for example, be placed in a rotary kiln plant for cement production.
  • Dust from exhaust gas from the steel manufacturing process approx. 2.5 t / h further oxidic dust: approx. 0.5 t / h
  • the granules produced according to the invention consist of the following main components (in percent by weight, based on dry matter):
  • a reduction reactor designed as a shaft furnace (1), i.e. In its reduction zone (2), lumpy iron oxide-containing feedstocks, such as ore (4), optionally with unburned additives (5), are charged from above via a feed line (3).
  • the shaft furnace (1) is connected to a melter gasifier (6), in which a reduction gas is generated from carbon carriers and oxygen-containing gas, which is fed to the shaft furnace (1) via a feed line (7) and this in counterflow to the feed materials (4 , 5) flows through.
  • a gas cleaning and gas cooling device which is designed as a scrubber (8), is provided in the feed line (7), through which at least a partial stream of the reducing gas is passed for the purpose of setting the temperature.
  • the melter gasifier (6) has a feed line (9) for solid carbon carriers (10) and feed lines (11) for oxygen-containing gases.
  • Molten pig iron (13) and molten slag (14) collect in the melter gasifier (6) below the melter gasification zone (12) and are tapped off by means of a tap (16, 15).
  • the starting materials (4,5) which are partially or completely reduced to sponge iron in the shaft furnace (1) in the reduction zone (2) are fed to the melter gasifier (6) via one or more feed lines (17), for example by means of screw conveyors.
  • a discharge line (18) for the top gas generated in the reduction zone connects to the upper part of the shaft furnace (1).
  • This top gas is fed to a gas cleaning device also designed as a scrubber (19) in order to remove dust and water vapor.
  • the top gas cleaned in the scrubber (19) is optionally available as a reduction gas to a further reduction reactor (20) which is introduced into the shaft furnace (20) via a reduction gas feed line (46).
  • the further reduction reactor (20) is also designed as a shaft furnace and, like the first reduction reactor (1), works in the countercurrent principle.
  • iron ore (21) in pieces and / or pellet form is also directly reduced in a reduction zone (22) to sponge iron which is discharged from the shaft furnace (20) via a discharge device (23).
  • the export gas drawn off from the further reduction reactor (20) via a line (24) is also subjected to cleaning and cooling in an export gas scrubber (25) in order to clean it of dust particles and to lower the water vapor content, after which it can be used for further use .
  • the pig iron tapped from the melter gasifier (6) and, if appropriate, the sponge iron discharged from the further reduction reactor (20) are charged into an electric furnace (26) for the production of steel.
  • the dust-laden exhaust gases produced during the steel production in this electric furnace (26) are cleaned in a dedusting system (27).
  • the sludges obtained in the scrubbers of the reducing gas (8), the top gas (19) and possibly the export gas (25) are fed to a thickener (28). From the thickener (28), the thickened sludge is fed via a delivery line (29) to a sludge drying device (30), for example a decanter centrifuge.
  • a sludge drying device for example a decanter centrifuge.
  • the dewatered sludge is mixed with the dust accumulated in the dedusting system (27) of the exhaust gases from the electric furnace (26), with further oxidic dust (31), such as ore abrasion and casting hall dust, and coal dust (32) in the mixer (33 a) of a and pelletizer (33a, 33b) are mixed. Furthermore, burnt lime (34) is added to the mixer (33a) to further reduce the residual moisture of the dewatered sludge and as a binder. This mixture of sludge, dust and quicklime is then fed to the granulator (33b) of the mixing and granulating device (33a, 33b).
  • the mixing and granulating device (33a, 33b) the mixture of sludge, dust and quicklime is granulated two-stage.
  • the mixing and granulating process steps take place in separate reactors, which are of different sizes, are equipped with separate drives and have mixing and granulating tools that are matched to the mixing and granulating tasks.
  • the granules are fed to a drying device (36) via a conveyor line (35).
  • the granules are preferably dried continuously in a third unit after the granulation.
  • This unit can be designed with a heatable double jacket.
  • the granules according to the invention are versatile beneficial recyclable due to their chemical composition ⁇ and because of their mechanical properties.
  • the dried granules are introduced into the shaft furnace (1) via a conveyor line (37) and via the feed line (3) for the lumpy iron oxide-containing feedstocks (4) and the additives (5).
  • the granules are introduced into the melter gasifier via the delivery line (37).
  • the granules are charged into the electric furnace (26) via a delivery line (38).
  • the granules are conveyed by means of a conveying line or a means of transport (39), for example by train, a melting and / or reducing unit (40), for example a blast furnace (40a), or another steel production unit, which is spatially separate from the system according to the invention , preferably a steel converter (40b) or electric furnace (40c).
  • the granules are fed to a cement production process (42) by means of a transport means (41), for example by rail.
  • the steel manufacturing unit (26) which is preferably designed as an electric furnace, it is possible for the first time to collectively utilize all waste and residual materials that occur in such a plant for producing pig iron, sponge iron and steel during exhaust gas cleaning.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Manufacture Of Iron (AREA)

Abstract

Selon ce procédé, des matériaux de départ constitués de minerai de fer, de préférence sous forme de morceaux et/ou de billes, et éventuellement d'agrégats sont directement réduits en fer spongieux dans une première zone de réduction. Le fer spongieux est élaboré en fonte brute liquide dans une zone de gazéification en fusion, des substances carbonées et du gaz contenant de l'oxygène étant ajoutés, et un gaz de réduction est produit. Après épuration des effluents gazeux, le gaz de réduction est introduit dans la première zone de réduction, mis en réaction et extrait sous forme de gaz de gueulard. Ce dernier est soumis à un processus d'épuration des effluents gazeux et éventuellement acheminé à une zone de réduction supplémentaire pour la réduction directe du minerai de fer en fer spongieux, mis en réaction avec le minerai de fer, extrait sous forme de gaz de dégagement et soumis à nouveau à une épuration des effluents gazeux. La fonte brute liquide et éventuellement le fer spongieux provenant de la zone de réduction supplémentaire sont introduits dans un processus de production d'acier, notamment un processus de production d'acier réalisé selon un procédé d'élaboration d'acier au four électrique, les effluents gazeux issus de ce processus étant épurés. L'invention concerne également un dispositif permettant la mise en oeuvre du procédé.
EP98954449A 1997-11-10 1998-10-26 Procede pour produire du fer de reduction directe, de la fonte brute liquide et de l'acier Ceased EP1029092A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT0190497A AT406272B (de) 1997-11-10 1997-11-10 Verfahren zur herstellung von direkt reduziertem eisen, flüssigem roheisen und stahl sowie anlage zur durchführung des verfahrens
AT190497 1997-11-10
PCT/EP1998/006792 WO1999024627A1 (fr) 1997-11-10 1998-10-26 Procede pour produire du fer de reduction directe, de la fonte brute liquide et de l'acier

Publications (1)

Publication Number Publication Date
EP1029092A1 true EP1029092A1 (fr) 2000-08-23

Family

ID=3523539

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98954449A Ceased EP1029092A1 (fr) 1997-11-10 1998-10-26 Procede pour produire du fer de reduction directe, de la fonte brute liquide et de l'acier

Country Status (17)

Country Link
US (1) US6395052B1 (fr)
EP (1) EP1029092A1 (fr)
JP (1) JP2001522938A (fr)
KR (1) KR100557710B1 (fr)
CN (1) CN1267568C (fr)
AT (1) AT406272B (fr)
AU (1) AU751205B2 (fr)
BR (1) BR9813200A (fr)
CA (1) CA2309606A1 (fr)
CZ (1) CZ20001652A3 (fr)
ID (1) ID24503A (fr)
PL (1) PL340539A1 (fr)
SK (1) SK6682000A3 (fr)
TR (1) TR200001283T2 (fr)
TW (1) TW474995B (fr)
WO (1) WO1999024627A1 (fr)
ZA (1) ZA9810208B (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19963609C1 (de) * 1999-12-23 2001-05-03 Voest Alpine Ind Anlagen Verfahren zur Erzeugung von Roheisen
US6669756B2 (en) * 2000-07-31 2003-12-30 Kabushiki Kaisha Kobe Seiko Sho Discharge apparatus for movable hearth type heat-treatment furnace, its operation method, and method and apparatus for manufacturing molten iron using the same
AT503593B1 (de) * 2006-04-28 2008-03-15 Siemens Vai Metals Tech Gmbh Verfahren zur herstellung von flüssigem roheisen oder flüssigen stahlvorprodukten aus feinteilchenförmigem eisenoxidhältigem material
CN101775460B (zh) * 2010-03-23 2012-05-02 武钢集团昆明钢铁股份有限公司 以100%低品质隧道窑直接还原铁为原料的电炉炼钢方法
CN101956038B (zh) * 2010-10-09 2012-10-31 董亚飞 一种铁矿石熔融还原低碳炼铁和炼钢工艺方法及装置
CN107129843A (zh) * 2017-06-28 2017-09-05 北京金泰瑞和工程科技有限公司 工业燃气供气系统及供气方法
US11427877B2 (en) 2017-09-21 2022-08-30 Nucor Corporation Direct reduced iron (DRI) heat treatment, products formed therefrom, and use thereof
DE102021122350A1 (de) 2021-08-30 2023-03-02 Thyssenkrupp Steel Europe Ag Verfahren zur Herstellung einer Eisenschmelze
CN117965884B (zh) * 2024-04-01 2024-06-11 烟台昌久智能科技有限公司 一种金属矿石预处理加工装置及加工方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3403018A (en) 1965-08-31 1968-09-24 Canada Steel Co Method of treating precipitator dust
LU73039A1 (fr) 1975-07-23 1977-03-24
US4119455A (en) 1977-09-28 1978-10-10 Carad, Inc. Method of recovering iron-bearing by-product flue dust
AT376241B (de) 1983-01-03 1984-10-25 Voest Alpine Ag Verfahren zum schmelzen von zumindest teilweise reduziertem eisenerz
SU1479006A3 (ru) 1984-11-26 1989-05-07 Фоест-Альпине (Фирма) Способ получени жидкого чугуна или продуктов стали и восстановительного газа в плавильном газификаторе
EP0515498B1 (fr) * 1990-02-13 1995-08-23 Illawarra Technology Corporation Ltd. Traitement conjoint d'eaux d'egout et de dechets d'acierie
DE4123626A1 (de) 1991-07-17 1993-01-21 Intercept Ag Verfahren zur metallurgischen aufarbeitung von huettenreststoffen
AT403055B (de) * 1993-05-07 1997-11-25 Voest Alpine Ind Anlagen Verfahren zur verwertung von eisenhältigen abfall- oder reststoffen
AT400725B (de) 1994-04-11 1996-03-25 Voest Alpine Ind Anlagen Verfahren zum herstellen einer eisenschmelze
US6287363B1 (en) * 1995-01-24 2001-09-11 Deutsche Voest-Alpine Industrienalagenbau Gmbh Method of utilizing dusts produced during the reduction of iron ore
AT405294B (de) * 1995-04-24 1999-06-25 Voest Alpine Ind Anlagen Verfahren zum verwerten von eisenhältigen hüttenreststoffen sowie anlage zur durchführung des verfahrens
AT405524B (de) 1996-03-05 1999-09-27 Voest Alpine Ind Anlagen Verfahren zur herstellung von flüssigem roheisen oder flüssigen stahlvorprodukten und metallschwamm

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9924627A1 *

Also Published As

Publication number Publication date
CN1278871A (zh) 2001-01-03
SK6682000A3 (en) 2000-11-07
KR20010031922A (ko) 2001-04-16
KR100557710B1 (ko) 2006-03-07
US6395052B1 (en) 2002-05-28
CZ20001652A3 (cs) 2002-01-16
ID24503A (id) 2000-07-20
CA2309606A1 (fr) 1999-05-20
BR9813200A (pt) 2000-08-29
TW474995B (en) 2002-02-01
WO1999024627A1 (fr) 1999-05-20
AU1155999A (en) 1999-05-31
AU751205B2 (en) 2002-08-08
AT406272B (de) 2000-03-27
PL340539A1 (en) 2001-02-12
ZA9810208B (en) 1999-05-28
TR200001283T2 (tr) 2001-05-21
CN1267568C (zh) 2006-08-02
JP2001522938A (ja) 2001-11-20
ATA190497A (de) 1999-08-15

Similar Documents

Publication Publication Date Title
EP0657549B1 (fr) Procédé de production d'une fonte d'acier
DE3782329T2 (de) Verfahren und vorrichtung zum rueckgewinnen von metallwertstoffen aus den abgasstaeuben und -schlaemmen von elektrolichtbogenoefen und ueberfuehren der festen reststoffe in wiederaufarbeitbare oder ungefaehrliche produkte.
AT403055B (de) Verfahren zur verwertung von eisenhältigen abfall- oder reststoffen
EP0302047B1 (fr) Procédé et installation pour l'obtention de fer fondu ou de précurseurs de l'acier à partir de matières de charge granulaire contenant de l'oxyde de fer
EP0143102B1 (fr) Procédé et appareil de production de fonte ou d'acier
WO1994012672A1 (fr) Procede et dispositif de production de fonte brute a partir du minerai de fer ou de traitement thermique et/ou chimique d'un materiau aisement decomposable
EP0990053B1 (fr) Dispositif et installation permettant de produire du fer en fonte dans un four a arc electrique en utilisant des residus metallurgiques agglomeres contenant du fer
AT406272B (de) Verfahren zur herstellung von direkt reduziertem eisen, flüssigem roheisen und stahl sowie anlage zur durchführung des verfahrens
AT400725B (de) Verfahren zum herstellen einer eisenschmelze
DE3536635A1 (de) Verfahren und vorrichtung zur rueckgewinnung, insbesondere von eisen sowie von zink, blei und anderen ne-metallischen bestandteilen aus hocheisenhaltigen oxydischen materialien
EP0766750B1 (fr) Procede et installation de recyclage de residus ferreux de l'industrie metallurgique
AT405524B (de) Verfahren zur herstellung von flüssigem roheisen oder flüssigen stahlvorprodukten und metallschwamm
AT404598B (de) Verfahren und anlage zur herstellung von fluessigem roheisen oder fluessigen stahlvorprodukten
AT407162B (de) Verfahren zur herstellung von flüssigem roheisen
WO2008046452A1 (fr) Produit fritté de ferrite de calcium, procédé de production et utilisation
EP0467874A1 (fr) Procédé pour le retraitement de poussières métallurgiques et installation pour sa réalisation
WO2000070101A1 (fr) Procede et dispositif utilisant un cyclone de fusion/reduction et un four inferieur et permettant de valoriser des matieres residuelles contenant du fer et des metaux lourds et/ou des fines de minerai de fer
AT403481B (de) Verfahren zum verwerten von beim reduzieren von eisenerz anfallenden stäuben
MXPA00004484A (en) Method for producing directly-reduced iron, liquid pig iron and steel

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: 20000413

AK Designated contracting states

Kind code of ref document: A1

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

17Q First examination report despatched

Effective date: 20010321

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

Owner name: VOEST-ALPINE INDUSTRIEANLAGENBAU GMBH

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

Owner name: VOEST-ALPINE INDUSTRIEANLAGENBAU GMBH & CO.

APAF Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNE

APBT Appeal procedure closed

Free format text: ORIGINAL CODE: EPIDOSNNOA9E

APBV Interlocutory revision of appeal recorded

Free format text: ORIGINAL CODE: EPIDOSNIRAPE

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

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 20051121