EP0882142B1 - Procede de transformation de matieres ferriferes en fonte brute liquide ou en produits bruts en acier - Google Patents

Procede de transformation de matieres ferriferes en fonte brute liquide ou en produits bruts en acier Download PDF

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Publication number
EP0882142B1
EP0882142B1 EP97911045A EP97911045A EP0882142B1 EP 0882142 B1 EP0882142 B1 EP 0882142B1 EP 97911045 A EP97911045 A EP 97911045A EP 97911045 A EP97911045 A EP 97911045A EP 0882142 B1 EP0882142 B1 EP 0882142B1
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EP
European Patent Office
Prior art keywords
fine
fluidized bed
particulate
iron
reduced material
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
EP97911045A
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German (de)
English (en)
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EP0882142A1 (fr
Inventor
Michael Nagl
Johannes-Leopold Schenk
Leopold Werner Kepplinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Primetals Technologies Austria GmbH
Posco Co Ltd
Research Institute of Industrial Science and Technology RIST
Original Assignee
Voest Alpine Industrienlagenbau GmbH
Research Institute of Industrial Science and Technology RIST
Pohang Iron and Steel Co Ltd
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, Research Institute of Industrial Science and Technology RIST, Pohang Iron and Steel Co Ltd filed Critical Voest Alpine Industrienlagenbau GmbH
Publication of EP0882142A1 publication Critical patent/EP0882142A1/fr
Application granted granted Critical
Publication of EP0882142B1 publication Critical patent/EP0882142B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • 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
    • 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

Definitions

  • the invention relates to a process for the production of liquid pig iron or Steel intermediate products made of fine particulate ferrous material, in particular reduced sponge iron, in a melter, in which with the addition of carbonaceous material and oxygen while forming a reducing gas the iron-containing material in a bed made of solid carbon supports is melted down, if necessary after prior reduction, the fine particulate reduced material and oxygen introduced laterally into the bed are, in the melter gasifier above one formed by solid carbon carriers Fixed bed a fluidized bed made of fine particulate solid carbon carriers and fine particulate iron-containing reduced materia is maintained and that fine particulate reduced material introduced directly into the fluidized bed and there is melted, as well as a plant for performing the method.
  • EP-B - 0 010 627 describes a process for the production of liquid pig iron or Steel intermediate products made of particulate, iron-containing material, in particular pre-reduced sponge iron, as well as for the generation of reducing gas in one Smelting gasifier known in which by adding coal and by blowing oxygen-containing gas a fluidized bed of coke particles is formed.
  • the oxygenated Gas or pure oxygen is in the lower area of the melter gasifier blown in.
  • the particulate ferrous material, especially pre-reduced Sponge iron, and the lumpy coal are fed through charging openings in the hood of the Melter gasifier fed from above, the falling particles are in the fluidized bed slowed down and the iron-containing particles are diarrhea by the Coke fluid bed reduced and melted.
  • the melted, covered with slag Metal collects on the bottom of the melter. Metal and slag are through separate tapping holes deducted.
  • a method of this type is for processing fine-particle sponge iron not suitable because fine iron sponge due to the strong upward directed Gas flow in the melter would immediately be discharged from this.
  • discharge of the finely divided metal carrier is still affected by the temperature in the upper one Area of the melter, i.e. in the area above the meltdown gasification zone, favored, since it is too low to melt, i.e. an agglomeration of the Fine particles at the point of introduction to larger particles that are in the Meltdown gasification zone could sink despite the upward gas flow, ensure.
  • lumpy iron ore is obtained Feedstocks directly reduced in a reduction shaft furnace, e.g. by means of the Melting gasification zone formed reducing gas.
  • the sponge iron obtained in this way is then fed to the meltdown gasification zone.
  • fine ore and / or ore dust such as in an iron and steel mill
  • the fine ore and / or the ore dust becomes solid Carbon carriers of a dust burner working in the melting gasification zone fed and implemented in a substoichiometric combustion reaction.
  • the process allows efficient processing of fine ore from a steel mill and / or ore dust, etc. up to the order of 20 to 30% of the Total ore use, and thus a combined processing of piece ore and fine ore.
  • the disadvantage here is that there are areas in the melting gasification zone Excess metal and areas can come with an excess of carbon.
  • EP-A-0 594 557 discloses a method of the type described at the outset, in which an iron sponge fine grain fraction is introduced directly into the fluidized bed formed in the melter gasifier by the melter gasification zone by means of a conveying gas.
  • an iron sponge fine grain fraction is introduced directly into the fluidized bed formed in the melter gasifier by the melter gasification zone by means of a conveying gas.
  • This is disadvantageous;
  • the fluidized bed can become blocked, which leads to insufficient gas flow and possibly to a gas build-up and, as a result, to eruptive gas breakthroughs with which the blocked fluidized bed is broken up.
  • the gasification process for the carbon carriers and also the smelting process for the reduced iron ore are severely disrupted.
  • EP-A-0 143 102 relates to the production of molten pig iron particulate ferrous material in a melter in which under Supply of solid carbonaceous material and oxygen to form Reducing gas from a lower fixed bed and a fluidized bed arranged above it carbonaceous material are formed.
  • the ferrous material and the oxygen are placed directly into the fluidized bed via laterally arranged charging pipes or nozzle pipes introduced and melted there.
  • the invention aims to avoid the disadvantages and described above Difficulties and is the task of a method of the type described above and to create an installation for carrying out the method, in which processing of fine particulate iron-containing and at least partially reduced material without one It is possible to require briquetting and, on the one hand, discharge of the supplied Fine particles reliably generated by the reducing gas generated in the melting gasification zone is avoided and on the other hand the gasification process undisturbed by the introduced fine particulate reduced material can run off. That is, there should be a burden on the Melting gasification zone due to the fine particulate iron-containing reduced material be avoided, etc. even if it contains up to 100% fine particulate iron reduced material is introduced into the melter.
  • This object is achieved according to the invention in a method of the type described in the introduction solved in that the reduced material in direct contact with oxygen is introduced, and the fine particulate reduced material before the introduction into the Fluidized bed collected in a collecting container to form a fluidized bed and out of the Fluidized bed further into the fluidized bed by means of a conveying and / or fluidizing gas is promoted.
  • the fine particle shape is reduced Material introduced into the fluidized bed by means of a fluidizing gas, preferably blown in.
  • fine particulate reduced material before introduction into the fluidized bed with formation a fluidized bed collected in a container and from the fluidized bed by means of a Conveying and / or fluidizing gas further promoted in the fluidized bed.
  • the fluidized bed forms a lock maintaining the pressure difference.
  • a conveying gas for the particulate is expediently placed in the fluidized bed reduced material under pressure, preferably with a pressure higher than that in the fluidized bed prevailing pressure.
  • a melter gasifier for the addition of carbon-containing material, iron-containing reduced fine particulate material or oxygen, a derivative for the extraction of the generated Reduction gas and also with a slag and iron melt rack, whereby a lower section of the melting gasifier for collecting the molten pig iron and the liquid slag and an overlying middle section for receiving a Fixed bed made of solid carbon carriers and then an upper section for receiving serve a fluidized bed and above it a calming room is provided, is in the amount of Fluidized bed in the side wall of the melter gasifier at least one confluence Delivery line for fine particulate reduced material provided, one Oxygen supply line immediately adjacent to the delivery line for the particulate reduced material is provided and the delivery line for the fine particulate reduced material from a collecting container serving as a fluidized bed lock with a fluidized bed formed therein leads to the melter gasifier.
  • the delivery line for the fine-particulate reduced material is preferably included Fluidizing gas acted upon.
  • the fluidized bed also advantageously protrudes into the melter Oxygen supply lance, its outlet for oxygen at the level of the fluidized bed and comes to lie centrally in cross-section.
  • the oxygen supply line advantageously passes through the delivery line for the fine particulate reduced material centrally with the formation of a ring conveyor for the fine particulate reduced material and flows into the melter.
  • FIGS. 1 and 2 each have a melter gasifier illustrate in vertical section in a schematic representation.
  • a melter gasifier 1 solid carbon-containing material 2, such as coal, and oxygen-containing gas, by gasifying the coal 2, a reducing gas is generated which via a discharge line 3 to a fluidized bed reactor, not shown, in the fine ore is reduced to sponge iron 4.
  • the melter gasifier 1 has one Supply line 5 for the solid carbon carriers 2, a supply line 6 for oxygen-containing gases, a supply line 7 for sponge iron and optionally supply lines for at Room temperature liquid or gaseous carbon carriers, such as hydrocarbons, as well for burned supplements.
  • the melter gasifier 1 collects in the bottom region 8 molten pig iron 9 and molten slag 10, which are tapped 11 be tapped.
  • the iron ore reduced to sponge iron 4 in the fluidized bed reactor is, if appropriate together with burned aggregates, via a conveyor from the Fluidized bed reactor, for example by means of discharge screws, and the Melter gasifier 1 supplied.
  • Both the lead 5 for the solid carbon carrier 2 as the discharge line 3 for the reducing gas are also in the dome area 12 of the melter gasifier 1 provided, etc. to several and approximately radially symmetrical arrangement.
  • the discharge line 3 opens into a solids separator 13 which is designed as a hot cyclone.
  • a hot cyclone 13 the fine particles 14, entrained with the reducing gas, deposited like coal and sponge iron and with a down pipe 15 into a collecting container 16 fluidized bed 18 formed therein.
  • a feed line opens into the fluidized bed 18 of the collecting container 16 serving as a fluidized bed lock 17 for reduced fine-particulate material, namely that made from fine ore Sponge iron 4, which is withdrawn from the fluidized bed reactor.
  • the feed line 7 for the sponge iron 4 leads from the fluidized bed 18 of the collecting container 16 into the Melting gasifier 1 at the level of that in the melting gasifier 1 above a fixed bed 20 carbon-containing material trained fluidized bed 21.
  • This fluidized bed 21 is from fine particulate carbonaceous material 2 and sponge iron 4 are formed.
  • the Carrier gas for maintaining the fluidized bed 21 is made from the fixed bed 20 escaping reducing gas, which is caused by the gasification of the carbonaceous material 2 is generated, formed.
  • the feed line 7, which is designed as a delivery line for the sponge iron 4, is at least in the mouth region 22 acted upon by fluidizing gas which the Sponge iron 4 in the melter 1 promotes.
  • an oxygen supply line 23 is provided, the mouth 24 just above the annular mouth 25 of the delivery line 7 into the melter gasifier 1 protrudes.
  • the oxygen jet introduced through the oxygen supply line 23 is from the supplied iron sponge 4 surround peripherally, i.e. enclosed. This is where it comes from immediately in the fluidized bed 21 as a result of the high temperature which arises Melting the sponge iron 4.
  • a plurality of collecting containers 16 with fluidized beds 18 are preferably distributed around the melter gasifier 1 arranged so that a radially symmetrical and across the cross section of the Melting gasifier 1 is even introduction of the sponge iron 4 is given.
  • can still between the mouths 25 of the sponge iron delivery lines 7 further oxygen supply lines 26 open into the melter gasifier 1, which increase the effectiveness of melting further increase.
  • an oxygen lance 27 is provided, the mouth 28 of which is approximately is provided in the center and just above the fixed bed 20 in the fluidized bed 21.
  • the Oxygen lance 27 expediently projects centrally into the melter 1 from above arranged.
  • the adjustment of the total height 29 from the fixed bed 20 and the fluidized bed 21 takes place in such a way that a reducing gas temperature in that provided above the fluidized bed 21 Calming room 30 of about 1050 ° C.
  • the location of the fixed bed surface can be changed the choice of the supplied coal grain and / or by dividing the total oxygen can be influenced on the fixed bed 20 and the fluidized bed 21.
  • a conveying gas which For example, is formed by cooled reducing gas in the upper part of the collecting container 16 supplied via a line 31, etc. in such an amount that the mouth 25 a cavity 32 in the fluidized bed 21 by the impulse of the entering Gases arises.
  • the invention is not limited to that shown in the drawing Embodiments, but can be modified in various ways. So it has to Oxygen supply line 23 may not be provided coaxially in the supply line 7. The important thing is immediately after the sponge iron 4 enters the melter 1 contact with oxygen, so that the melting process of the sponge iron 4 can take place completely in the fluidized bed 21. To achieve this, the Supply line 7 and the oxygen supply line 23 may be arranged immediately adjacent if the best result is also achieved when the sponge iron 4 emits the oxygen jet encloses at least in the region of the mouth 25.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Iron (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)

Claims (11)

  1. Procédé de production de fonte brute liquide (9) ou de précurseurs de l'acier à partir d'un matériau contenant du fer (4) sous forme de fines particules, en particulier d'éponge de fer réduite, dans un gazéificateur à fusion (1) dans lequel, avec apport de matériau carboné et d'oxygène et formation simultanée d'un gaz de réduction dans un lit (20, 21) constitué par des supports de carbone solides, le matériau contenant du fer (4) est fondu, éventuellement après réduction complète préalable, où le matériau réduit (4) sous forme de fines particules et l'oxygène sont introduits latéralement dans le lit (20, 21), dans le gazéificateur à fusion (1), au-dessus d'un lit fixe (20) formé par des supports de carbone solides (2), un lit fluidisé (21) constitué par des supports de carbone solides (2) sous forme de fines particules et par le matériau réduit contenant du fer (4) sous forme de fines particules est maintenu et le matériau réduit (4) sous forme de fines particules est introduit directement dans le lit fluidisé (21) et y est fondu, où le matériau réduit (4) est mis en contact direct avec l'oxygène, et, avant l'introduction dans le lit fluidisé ((21), le matériau réduit (4) sous forme de fines particules est rassemblé dans un réservoir (16) servant de sas à couche fluidisée, avec formation d'une couche fluidisée (18), et est transporté au moyen d'un gaz vecteur et/ou de fluidisation de la couche fluidisée (18) dans le lit fluidisé (21).
  2. Procédé selon la revendication 1, caractérisé en ce que le matériau réduit (4) sous forme de fines particules est introduit, de préférence insufflé, dans le lit fluidisé (21) au moyen d'un gaz de fluidisation.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que, dans le lit fluidisé (21), de l'oxygène est insufflé en outre dans son domaine central, de préférence par en haut.
  4. Procédé selon une ou plusieurs des revendications 1 à 3, caractérisé en ce que le matériau réduit (4) sous forme de fines particules est insufflé sous pression dans le lit fluidisé (21) au moyen d'un gaz vecteur, de sorte qu'il se forme au niveau de l'embouchure dans le lit fluidisé (21) une cavité libre (32) pour le matériau réduit (4) sous forme de fines particules.
  5. Procédé selon une ou plusieurs des revendications 1 à 4, caractérisé en ce que le matériau (4) sous forme de fines particules est introduit sous forme d'un écheveau entourant périphériquement un jet d'oxygène, présentant une section droite annulaire et entourant l'oxygène.
  6. Procédé selon une ou plusieurs des revendications 4 et 5, caractérisé en ce qu'un gaz vecteur pour le matériau réduit (4) sous forme de fines particules est introduit sous pression dans la couche fluidisée (18), de préférence à une pression supérieure à la pression régnant dans le lit fluidisé (21).
  7. Installation pour la mise en oeuvre du procédé selon une ou plusieurs des revendications 1 à 6, avec un gazéificateur à fusion (1) avec des conduites d'apport (5, 6, 7) pour l'apport de matériau contenant du carbone (2), du matériau réduit contenant du fer (4) sous forme de fines particules et de l'oxygène, une conduite d'évacuation (3) pour l'évacuation du gaz de réduction formé ainsi qu'un trou de percée (11) pour la masse fondue de scorie et de fer, où une section inférieure (8) du gazéificateur à fusion (1) sert à recevoir la fonte brute fondue (9) et la scorie liquide (10) et une section moyenne située au-dessus sert à recevoir un lit fixe (20) constitué par des supports de carbone solides et ensuite une section supérieure sert à recevoir un lit fluidisé (21), et il est prévu au-dessus un espace de stabilisation (30), à la hauteur du lit fluidisé (21) il est prévu dans la paroi latérale du gazéificateur à fusion (1) au moins une embouchure d'une conduite de transport (7) pour du matériau réduit (4) sous forme de fines particules, où une conduite d'apport d'oxygène (23) est prévue au voisinage immédiat de la conduite de transport (7) pour le matériau réduit (4) sous forme de fines particules et la conduite de transport (7) pour le matériau réduit (4) sous forme de fines particules conduit d'un réservoir (16) servant de sas à couche fluidisée, dans lequel est formée une couche fluidisée (18), au gazéificateur à fusion (1).
  8. Installation selon la revendication 7, caractérisée en ce que la conduite de transport (7) pour le matériau réduit (4) sous forme de fines particules peut être alimentée en gaz de fluidisation.
  9. Installation selon une ou plusieurs des revendications 1 à 8, caractérisée en ce que, dans le gazéificateur à fusion (1) fait saillie en outre une lance d'apport d'oxygène (27) dont l'ouverture de sortie (28) pour l'oxygène est située à la hauteur du lit fluidisé (21) et de manière centrée en section transversale.
  10. Installation selon une ou plusieurs des revendications 1 à 9, caractérisée en ce que la conduite d'apport d'oxygène (23) traverse la conduite d'apport (7) pour le matériau réduit sous forme de fines particules en son centre en formant une cavité de transport annulaire pour le matériau réduit (4) sous forme de fines particules et débouche dans le gazéificateur à fusion (1).
  11. Installation selon une ou plusieurs des revendications 7 à 10, caractérisée en ce qu'une conduite (31) apportant un gaz vecteur pour le matériau réduit (4) sous forme de fines particules débouche dans le réservoir (16) dans lequel est formée une couche fluidisée (18).
EP97911045A 1996-11-08 1997-11-05 Procede de transformation de matieres ferriferes en fonte brute liquide ou en produits bruts en acier Expired - Lifetime EP0882142B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AT1964/96 1996-11-08
AT196496 1996-11-08
AT0196496A AT404022B (de) 1996-11-08 1996-11-08 Verfahren und anlage zur herstellung von flüssigem roheisen oder stahlvorprodukten aus eisenhältigemmaterial
PCT/AT1997/000239 WO1998021371A1 (fr) 1996-11-08 1997-11-05 Procede de transformation de matieres ferriferes en fonte brute liquide ou en produits bruts en acier

Publications (2)

Publication Number Publication Date
EP0882142A1 EP0882142A1 (fr) 1998-12-09
EP0882142B1 true EP0882142B1 (fr) 2001-10-04

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EP97911045A Expired - Lifetime EP0882142B1 (fr) 1996-11-08 1997-11-05 Procede de transformation de matieres ferriferes en fonte brute liquide ou en produits bruts en acier

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Country Link
US (1) US6454833B1 (fr)
EP (1) EP0882142B1 (fr)
KR (1) KR100466631B1 (fr)
AT (1) AT404022B (fr)
AU (1) AU733396C (fr)
BR (1) BR9707117A (fr)
CA (1) CA2242392A1 (fr)
DE (1) DE59704790D1 (fr)
RU (1) RU2192475C2 (fr)
UA (1) UA44347C2 (fr)
WO (1) WO1998021371A1 (fr)
ZA (1) ZA9710040B (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT408991B (de) * 2000-04-28 2002-04-25 Voest Alpine Ind Anlagen Verfahren und anlage zur herstellung einer metallschmelze
KR100972195B1 (ko) * 2006-05-17 2010-07-23 주식회사 포스코 탄화수소 함유가스 취입에 의한 용철제조방법 및 이를이용한 용철제조장치
US8199790B2 (en) * 2007-11-02 2012-06-12 Plasma Waste Recycling, Inc. Reactor vessel for plasma gasification
EP2664681A1 (fr) * 2012-05-16 2013-11-20 Siemens VAI Metals Technologies GmbH Procédé et dispositif d'introduction de matière à fines particules dans le lit fluidisé d'un agrégat de réduction.
EP2905345A1 (fr) 2014-02-10 2015-08-12 Primetals Technologies Austria GmbH Chargement pneumatique de minerai
ITUA20163986A1 (it) * 2016-05-31 2017-12-01 Tenova Spa Metodo ed apparato per la produzione di ghisa, ghisa prodotta secondo detto metodo
EP3548640B1 (fr) 2016-12-02 2022-09-21 Tenova S.p.A. Four métallurgique convertible et installation métallurgique modulaire comprenant ledit four pour la conduite de processus de production en matière d'élaboration de métaux en fusion, en particulier l'acier ou la fonte

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3142430A (en) * 1963-03-15 1964-07-28 American Can Co Carton
GB1283333A (en) * 1969-01-13 1972-07-26 Sikob Ab Folding container having triangular cross section
FR2053427A5 (fr) * 1969-07-08 1971-04-16 Dupuis Jean
DE2843303C2 (de) 1978-10-04 1982-12-16 Korf-Stahl Ag, 7570 Baden-Baden Verfahren und Anlage zur Erzeugung von flüssigem Roheisen und Reduktionsgas in einem Einschmelzvergaser
US4457777A (en) * 1981-09-07 1984-07-03 British Steel Corporation Steelmaking
US4419965A (en) * 1981-11-16 1983-12-13 Foster Wheeler Energy Corporation Fluidized reinjection of carryover in a fluidized bed combustor
US4457289A (en) * 1982-04-20 1984-07-03 York-Shipley, Inc. Fast fluidized bed reactor and method of operating the reactor
DE3328373A1 (de) 1982-11-15 1984-05-17 Korf Engineering GmbH, 4000 Düsseldorf Verfahren und anlage zur direkten erzeugung von eisenschwammpartikeln und fluessigem roheisen aus stueckigem eisenerz
AT382165B (de) * 1983-08-18 1987-01-26 Voest Alpine Ag Verfahren zur herstellung von fluessigem roheisen oder stahlvorprodukten sowie vorrichtung zur durchfuehrung des verfahrens
FR2562506B3 (fr) * 1984-04-10 1986-07-18 Socar Bac de manutention en un materiau semi-rigide
AT381116B (de) * 1984-11-15 1986-08-25 Voest Alpine Ag Verfahren zur herstellung von fluessigem roheisen oder stahlvorprodukten sowie vorrichtung zur durchfuehrung des verfahrens
DE3504346C2 (de) * 1985-02-06 1986-11-27 Korf Engineering GmbH, 4000 Düsseldorf Verfahren und Vorrichtung zur Erzeugung von Eisenschwammpartikeln und flüssigem Roheisen
DE3535572A1 (de) 1985-10-03 1987-04-16 Korf Engineering Gmbh Verfahren zur herstellung von roheisen aus feinerz
US4733619A (en) * 1986-12-01 1988-03-29 Ube Industries Powder feeder
US4781574A (en) * 1987-05-08 1988-11-01 Foster Wheeler Development Corporation Method and system for controlling cyclone collection efficiency and recycle rate in fluidized bed reactors
FI873735A0 (fi) * 1987-08-28 1987-08-28 Ahlstroem Oy Foerfarande och anordning foer foergasning av fast kolhaltigt material.
ES2093641T3 (es) 1988-12-20 1997-01-01 Cra Services Fabricacion de hierro y acero en un recipiente de fusion duplex y un pre-reductor de suspension de oxido al estado solido.
US5110323A (en) * 1990-01-04 1992-05-05 Stone & Webster Engineering Corp. Process for the return of recovered particulate solids by a cyclone separator to a vessel
DE4041936C1 (fr) 1990-12-27 1992-09-24 Deutsche Voest-Alpine Industrieanlagenbau Gmbh, 4000 Duesseldorf, De
JPH059526A (ja) * 1991-06-27 1993-01-19 Mitsubishi Heavy Ind Ltd 銑鉄製造装置
US5098014A (en) * 1991-08-01 1992-03-24 Jefferson Smurfit Corporation Collapsible, self-locking, paperboard carton
AT401777B (de) 1992-05-21 1996-11-25 Voest Alpine Ind Anlagen Verfahren und anlage zur herstellung von flüssigen roheisen oder flüssigen stahlvorprodukten
AT404735B (de) * 1992-10-22 1999-02-25 Voest Alpine Ind Anlagen Verfahren und anlage zur herstellung von flüssigem roheisen oder flüssigen stahlvorprodukten
KR970009084B1 (ko) * 1994-12-29 1997-06-05 김만제 탄소성분을 포함한 미분체 용융장치 및 이를 이용한 미분체 용융방법
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

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AU733396B2 (en) 2001-05-10
UA44347C2 (uk) 2002-02-15
US6454833B1 (en) 2002-09-24
AT404022B (de) 1998-07-27
AU733396C (en) 2002-06-06
AU4855797A (en) 1998-06-03
KR100466631B1 (ko) 2005-06-02
WO1998021371A1 (fr) 1998-05-22
DE59704790D1 (de) 2001-11-08
ATA196496A (de) 1997-12-15
ZA9710040B (en) 1998-05-25
RU2192475C2 (ru) 2002-11-10
CA2242392A1 (fr) 1998-05-22
BR9707117A (pt) 1999-07-20
EP0882142A1 (fr) 1998-12-09
KR19990077105A (ko) 1999-10-25

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