EP0036382A1 - Procédé et dispositif pour la production de la fonte liquide - Google Patents

Procédé et dispositif pour la production de la fonte liquide Download PDF

Info

Publication number
EP0036382A1
EP0036382A1 EP81630015A EP81630015A EP0036382A1 EP 0036382 A1 EP0036382 A1 EP 0036382A1 EP 81630015 A EP81630015 A EP 81630015A EP 81630015 A EP81630015 A EP 81630015A EP 0036382 A1 EP0036382 A1 EP 0036382A1
Authority
EP
European Patent Office
Prior art keywords
bath
iron
vessel
oxygen
gas
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Withdrawn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
EP81630015A
Other languages
German (de)
English (en)
Inventor
Paul Metz
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.)
Arcelor Luxembourg SA
Original Assignee
Arbed SA
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 Arbed SA filed Critical Arbed SA
Publication of EP0036382A1 publication Critical patent/EP0036382A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
    • 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

Definitions

  • the present invention relates to a method and a device for producing liquid iron, in particular for producing directly from oxidic iron compounds.
  • the raw materials are first converted into sponge iron using a suitable gas and then melted in a metallurgical vessel, in the melting vessel by reaction of oxygen-containing gases with carbon-containing substances, which are primarily blown in under the bath surface , Heat energy, and carbon monoxide are formed.
  • the heat is partly used to melt the sponge iron and the exhaust gas is used for the direct reduction of ores.
  • the entire exhaust gas is initially treated in a separate reactor with coal dust and with water vapor.
  • a reducing gas is produced in a combined melting and gas generating reactor provided with an additional heater by reacting a fuel with oxygen, which gas is produced in a subsequent reduction chamber in countercurrent of an ore feed, while the pre-reduced ore obtained at the end of the reduction stage is conveyed into the heated melting and gas production room, where it is melted and then freshly refined.
  • two separate feed or reaction zones are provided in the smelting and gas generating reactor.
  • a carbon carrier is introduced directly into the bath in order to maintain a carbon content of the metal melt, which is preferably above 2%.
  • part of the carbon bound to the melt is released of heat and reducing gases burned using oxygen.
  • the carbon supplied by a lance is thus used here on the way through an intermediate carburizing of the iron bath essentially to increase the melting capacity of the bath and to form reducing gases.
  • the aim of the invention is therefore to propose a method which allows the direct production of molten pig iron in a single vessel, the aforementioned difficulties being avoided, and a suitable device for this.
  • the method according to the invention which provides for saturating an iron bath with carbon by blowing in a carbon carrier by means of a neutral or reducing carrier gas and which is characterized in that a pouring cone of iron ore is formed on the bath surface in the central zone and onto the free bath surface of the peripheral zone blows oxygen, the bath being flushed with a neutral gas through at least one blow stone arranged in the bottom of the vessel.
  • the idea on which the invention is based is that the composition of the gases formed when oxygen is blown onto an iron bath saturated with carbon by simultaneously flushing with neutral gas according to the invention can be controlled.
  • the resulting carbon monoxide can be post-burned on the surface of the bath, which takes place with intense heat generation.
  • the amounts of purge gas are then preferably between 0.1-0.3 Nm3 / t.hour.
  • the additional heat generated on the surface of the bath can be used to melt the iron ore just applied there.
  • the iron bath is generally mixed by the inert gas stream with the carbon carrier, preferably coal dust, suspended therein, and in the event of saturation of the bath, solid carbon that is not bound to iron is carried to the bath surface, where it is available for reducing the molten ore.
  • the carbon carrier preferably coal dust, suspended therein, and in the event of saturation of the bath, solid carbon that is not bound to iron is carried to the bath surface, where it is available for reducing the molten ore.
  • the heat supply to the bath itself is accomplished by continuously or intermittently blowing oxygen onto the surface of the outer zone. Inflation onto the bath surface is not hindered by the presence of molten and freshly applied iron ore, since the latter is primarily on the surface of the central zone.
  • the device required to carry out the method according to the invention consists of a metallurgical vessel (1) in which there is an iron bath (40) and which understands a closing cover (20) into which a chimney (30) opens, at least one oxygen inflation lance (21 ) through the vessel lid (29) aims at the edge zone (3). and a blowing lance (12) for the solid carbon carrier projects under the bath level, while there is at least one blow stone (11) in the vessel bottom (10) below the center of the bath gel.
  • the nozzle of this blowing lance is conveniently located near the blowing stone and between the same and the lower edge of the partition. With the appropriate setting of the individual gas pressures (inflation lance, blowing lance, blow stones), this can cause currents to form inside the vessel which rise towards the inner zone and decrease along the vessel migration.
  • liquid iron with a carbon content above 2% is formed, which is expediently fed to a continuously operating fresh plant.
  • FIG. 1 shows a section through the device according to the invention.
  • the oxygen inflation lances (21, 22) are arranged above the edge zone (3).
  • the blow stones (11) are arranged in the vessel bottom (1), through which the bath (40) is flushed with a neutral gas, which thus generates an ascending flow towards the inner zone.
  • the vessel also has the tap openings (13 and 14) for the liquid metal or the slags.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Iron (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
EP81630015A 1980-03-05 1981-02-10 Procédé et dispositif pour la production de la fonte liquide Withdrawn EP0036382A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU82227 1980-03-05
LU82227A LU82227A1 (de) 1980-03-05 1980-03-05 Verfahren und einrichtung zum herstellen von fluessigem eisen

Publications (1)

Publication Number Publication Date
EP0036382A1 true EP0036382A1 (fr) 1981-09-23

Family

ID=19729365

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81630015A Withdrawn EP0036382A1 (fr) 1980-03-05 1981-02-10 Procédé et dispositif pour la production de la fonte liquide

Country Status (7)

Country Link
US (1) US4399983A (fr)
EP (1) EP0036382A1 (fr)
JP (1) JPS56136912A (fr)
AU (1) AU6802181A (fr)
CA (1) CA1158443A (fr)
LU (1) LU82227A1 (fr)
ZA (1) ZA811303B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0063532A1 (fr) * 1981-04-22 1982-10-27 Arbed S.A. Procédé et dispositif pour la production directe de la fonte liquide
EP0084288A1 (fr) * 1981-12-09 1983-07-27 Arbed S.A. Procédé et dispositif pour la production directe de la fonte liquide
EP0094707A1 (fr) * 1982-05-12 1983-11-23 Hoogovens Groep B.V. Procédé et dispositif d'obtention de fer liquide
EP0117318A1 (fr) * 1983-02-10 1984-09-05 Metallgesellschaft Ag Procédé pour la fusion en continu d'éponge de fer
EP0290650A1 (fr) * 1986-01-20 1988-11-17 Nippon Kokan Kabushiki Kaisha Procédé de préparation d'acier par la réduction en bain de fusion
EP0326402A3 (en) * 1988-01-29 1990-07-11 Kabushiki Kaisha Kobe Seiko Sho Also Known As Kobe Steel Ltd. Smelting reduction process

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE435732B (sv) * 1983-03-02 1984-10-15 Ips Interproject Service Ab Forfarande for framstellning av rajern ur jernslig
DE3318005C2 (de) * 1983-05-18 1986-02-20 Klöckner CRA Technologie GmbH, 4100 Duisburg Verfahren zur Eisenherstellung
JPH0136903Y2 (fr) * 1985-07-30 1989-11-08
US4936908A (en) * 1987-09-25 1990-06-26 Nkk Corporation Method for smelting and reducing iron ores
JPH02221336A (ja) * 1989-02-21 1990-09-04 Nkk Corp Ｎｉ鉱石の溶融還元法
EP1380656A1 (fr) * 2002-07-10 2004-01-14 Corus Technology BV Dispositif et procédé de fusion directe
WO2004007777A2 (fr) * 2002-07-10 2004-01-22 Corus Technology Bv Cuve de métallurgie

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2525355A1 (de) * 1974-06-07 1975-12-18 British Steel Corp Verfahren und vorrichtung zum frischen von eisen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2740710A (en) * 1951-03-02 1956-04-03 Johannsen Friedrich Method for the production of iron, nickel, cobalt, manganese, and chromium from their ores
US3326671A (en) * 1963-02-21 1967-06-20 Howard K Worner Direct smelting of metallic ores
GB1046675A (en) * 1964-10-16 1966-10-26 Air Liquide Improvements in or relating to the production of steel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2525355A1 (de) * 1974-06-07 1975-12-18 British Steel Corp Verfahren und vorrichtung zum frischen von eisen

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0063532A1 (fr) * 1981-04-22 1982-10-27 Arbed S.A. Procédé et dispositif pour la production directe de la fonte liquide
EP0084288A1 (fr) * 1981-12-09 1983-07-27 Arbed S.A. Procédé et dispositif pour la production directe de la fonte liquide
EP0094707A1 (fr) * 1982-05-12 1983-11-23 Hoogovens Groep B.V. Procédé et dispositif d'obtention de fer liquide
EP0117318A1 (fr) * 1983-02-10 1984-09-05 Metallgesellschaft Ag Procédé pour la fusion en continu d'éponge de fer
EP0290650A1 (fr) * 1986-01-20 1988-11-17 Nippon Kokan Kabushiki Kaisha Procédé de préparation d'acier par la réduction en bain de fusion
US4792352A (en) * 1986-01-20 1988-12-20 Nippon Kokan Kabushiki Kaisha Method for manufacturing steel through smelting reduction
EP0326402A3 (en) * 1988-01-29 1990-07-11 Kabushiki Kaisha Kobe Seiko Sho Also Known As Kobe Steel Ltd. Smelting reduction process

Also Published As

Publication number Publication date
US4399983A (en) 1983-08-23
AU6802181A (en) 1981-09-10
CA1158443A (fr) 1983-12-13
LU82227A1 (de) 1981-10-30
ZA811303B (en) 1982-03-31
JPS56136912A (en) 1981-10-26

Similar Documents

Publication Publication Date Title
EP0126391B1 (fr) Procédé de production de fer
DE4206828C2 (de) Schmelzreduktionsverfahren mit hoher Produktivität
DE69830924T2 (de) Direktschmelzverfahren zur herstellung von metallen aus metalloxiden
DE3607774C2 (fr)
EP0842301B1 (fr) Procede de production de pozzolanes, de laitiers synthetiques de haut fourneau, de clinkers de belite ou d'alite, et d'alliages de fonte brute, a partir de laitiers oxydiques, et dispositif pour la mise en oeuvre de ce procede
EP0037809B1 (fr) Procédé pour la production de fonte liquide ou de prématériau d'acier et dispositif pour la mise en oeuvre de ce procédé
EP0657549A1 (fr) Procédé de production d'une fonte d'acier
DD140757A5 (de) Verfahren zur verbesserung der waermebilanz beim stahlfrischen
EP0302111A1 (fr) Procede et fourneau pour la production de produits intermediaires de fer-carbone pour la preparation de l'acier
DE68907227T2 (de) Schmelzreduktionsverfahren.
DE60131426T2 (de) Verfahren und vorrichtung zur direkterschmelzung
DD261379A5 (de) Huettenwerk sowie verfahren zum betrieb eines solchen huettenwerkes
DE2525355A1 (de) Verfahren und vorrichtung zum frischen von eisen
LU82227A1 (de) Verfahren und einrichtung zum herstellen von fluessigem eisen
DE2550761A1 (de) Verfahren zur herstellung von fluessigem eisen
DE3850381T2 (de) Ofen und verfahren zur reduktion eines chromvorproduktes durch schmelzen.
LU83826A1 (de) Verfahren und einrichtung zum direkten herstellen von fluessigem eisen
DE4041689C2 (de) Verfahren und Anlage zum Herstellen von flüssigem Stahl aus Eisenoxiden
EP0167895A1 (fr) Procédé et dispositif pour la production d'acier à partir de ferraille
DE1907543B2 (de) Verfahren und vorrichtung zum kontinuierlichen raffinieren von metallen
DE69129466T2 (de) Verfahren und vorrichtung zur herstellung von stahl in einem flüssigen bad
DE3418085C2 (fr)
DE3133575C2 (de) Verfahren zur Eisenherstellung aus Stoffen, die Eisen mindestens teilweise in oxidischer Form enthalten
DE68909259T2 (de) Verfahren zum Einschmelzen von kaltem Eisen.
DE3008145C2 (de) Stahlerzeugungsverfahren

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

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

17P Request for examination filed

Effective date: 19820302

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

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19840120

RIN1 Information on inventor provided before grant (corrected)

Inventor name: METZ, PAUL