EP0036382A1 - Procédé et dispositif pour la production de la fonte liquide - Google Patents
Procédé et dispositif pour la production de la fonte liquide Download PDFInfo
- 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- Withdrawn
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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)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
LU82227A LU82227A1 (de) | 1980-03-05 | 1980-03-05 | Verfahren und einrichtung zum herstellen von fluessigem eisen |
LU82227 | 1980-03-05 |
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)
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 |
EP0326402A2 (fr) * | 1988-01-29 | 1989-08-02 | KABUSHIKI KAISHA KOBE SEIKO SHO also known as Kobe Steel Ltd. | Procédé de réduction par fusion |
Families Citing this family (7)
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 |
AU2003281064B2 (en) * | 2002-07-10 | 2009-04-23 | Corus Technology Bv | Metallurgical vessel and method of iron making by means of direct reduction |
Citations (1)
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)
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 |
-
1980
- 1980-03-05 LU LU82227A patent/LU82227A1/de unknown
-
1981
- 1981-02-10 EP EP81630015A patent/EP0036382A1/fr not_active Withdrawn
- 1981-02-26 ZA ZA00811303A patent/ZA811303B/xx unknown
- 1981-03-02 CA CA000372064A patent/CA1158443A/fr not_active Expired
- 1981-03-03 AU AU68021/81A patent/AU6802181A/en not_active Abandoned
- 1981-03-04 JP JP3001381A patent/JPS56136912A/ja active Pending
- 1981-03-05 US US06/240,839 patent/US4399983A/en not_active Expired - Fee Related
Patent Citations (1)
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 (8)
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 |
EP0326402A2 (fr) * | 1988-01-29 | 1989-08-02 | KABUSHIKI KAISHA KOBE SEIKO SHO also known as Kobe Steel Ltd. | Procédé de réduction par fusion |
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 |
---|---|
AU6802181A (en) | 1981-09-10 |
CA1158443A (fr) | 1983-12-13 |
JPS56136912A (en) | 1981-10-26 |
LU82227A1 (de) | 1981-10-30 |
US4399983A (en) | 1983-08-23 |
ZA811303B (en) | 1982-03-31 |
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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 |