EP0882142A1 - Verfahren zur herstellung von flüssigem roheisen oder stahlvorprodukten aus eisenhältigem material - Google Patents
Verfahren zur herstellung von flüssigem roheisen oder stahlvorprodukten aus eisenhältigem materialInfo
- Publication number
- EP0882142A1 EP0882142A1 EP97911045A EP97911045A EP0882142A1 EP 0882142 A1 EP0882142 A1 EP 0882142A1 EP 97911045 A EP97911045 A EP 97911045A EP 97911045 A EP97911045 A EP 97911045A EP 0882142 A1 EP0882142 A1 EP 0882142A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fluidized bed
- iron
- oxygen
- fine
- 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.)
- Granted
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
-
- 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 molten pig iron or steel precursors from fine-particulate ferrous material, in particular reduced sponge iron, in a melter gasifier in which the ferrous material is melted in a bed formed from solid carbon carriers with the addition of carbon-containing material and oxygen with simultaneous formation of a reducing gas is, if necessary after a previous finished reduction, the fine particulate reduced material and oxygen being introduced laterally into the bed, and a plant for carrying out the method.
- EP-B-0 010 627 discloses a process for the production of molten pig iron or intermediate steel products from particulate, iron-containing material, in particular pre-reduced sponge iron, and for the generation of reducing gas in a melter gasifier, in which by adding coal and by blowing in oxygen-containing gas Gas a fluidized bed is formed from coke particles. The oxygen-containing gas or pure oxygen is blown in at the bottom of the melter.
- the particulate iron-containing material, in particular pre-reduced iron sponge, and the lumpy coal are fed from above through charging openings in the hood of the melter gasifier, the falling particles are decelerated in the fluidized bed and the iron-containing particles are reduced and melted while falling through the coke fluid bed.
- the molten metal covered with slag collects at the bottom of the melter. Metal and slag are removed through separate tap holes.
- a method of this type is not suitable for processing fine-particle sponge iron, since fine-particle iron sponge would be discharged from the melter gasifier immediately as a result of the strong upward gas flow.
- Such discharge of the finely divided metal carriers is further promoted by the temperature in the upper region of the melter gasifier, that is to say in the region above the meltdown gasification zone, since this is too low to melt, ie agglomerate, the fine particles at the point of introduction into larger particles which could sink into the meltdown gasification zone despite the upward flowing gas.
- EP-A-0 217 331 it is known to directly pre-reduce fine ore in a fluidized bed process and to pass the pre-reduced fine ore into a melter gasifier and to reduce and melt it by means of a plasma torch while supplying a carbon-containing reducing agent.
- a fluidized bed is formed in the melter gasifier and a fluidized bed of coke is formed above it.
- the pre-reduced fine ore or the sponge iron powder is fed to a plasma torch provided in the lower section of the melting gasifier.
- the disadvantage here is that by feeding in the pre-reduced fine ore directly in the lower smelting area, ie in the area of the melt collection, finished reduction is no longer ensured and the chemical composition required for further processing of the pig iron can in no case be achieved.
- the introduction of large quantities of pre-reduced fine ore is not possible because of the fluidized bed or fixed bed formed from coal in the lower region of the melting gasifier, since sufficient removal of the melt products from the high-temperature zone of the plasma torch is not possible.
- the introduction of larger quantities of pre-reduced fine ore would immediately lead to thermal and mechanical failure of the plasma torch.
- a baffle plate is provided to minimize the speed of the fine grain fraction, so that the exit speed of the fine grain fraction from the downpipe is very low.
- the temperature prevailing in the melter gasifier is very low, as a result of which the fine grain fraction supplied cannot immediately melt.
- This and the low exit velocity from the downpipe mean that a considerable proportion of the fine-grain fraction supplied exits the reducing gas generated in the melter gasifier.
- the introduction of a larger amount of fine grain or only fine grain is not possible according to this procedure.
- EP-A-0 594 557 discloses a process 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 clogged, which leads to insufficient gassing and possibly to a gas build-up and consequently to eruptive gas breakthroughs with which the blocked fluidized bed is broken open. This severely interferes with the gasification process for the carbon carriers and also the smelting process for the reduced iron ore.
- the invention aims to avoid these disadvantages and difficulties and has as its object to provide a method of the type described above and an installation for carrying out the method, in which a processing of fine particulate iron-containing and at least partially reduced material is possible without requiring briquetting and discharge of the supplied fine particles by the reducing gas generated in the melt-down gasification zone is reliably avoided on the one hand and on the other hand the gasification process can run undisturbed by the fine-particle-shaped reduced material introduced. Ie, the melting gasification zone is to be loaded by the fine-particulate iron-containing reduced material be avoided, etc. even if up to 100% fine particulate iron-containing reduced material is introduced into the melter.
- This object is achieved in that above a fixed bed formed by solid carbon carriers, a fluidized bed of fine particulate solid carbon carriers and fine particulate iron-containing reduced material is maintained and the fine particulate reduced material directly in the fluidized bed in direct contact with oxygen, preferably in the form of an oxygen jet peripheral surrounding, having an annular cross section and enclosing the oxygen, is introduced, and that the fine particulate reduced material is melted in the fluidized bed.
- oxygen preferably in the form of an oxygen jet peripheral surrounding, having an annular cross section and enclosing the oxygen
- the fine-particulate reduced material is introduced into the fluidized bed, preferably blown in, by means of a fluidizing gas.
- oxygen is preferably additionally blown into the fluidized bed in the central region of the same, preferably from above.
- the fine-particulate reduced material is expediently collected in a container before being introduced into the fluidized bed, forming a fluidized bed, and further into the fluidized bed from the fluidized bed by means of a conveying and / or fluidizing gas promoted.
- the fluidized bed forms a lock maintaining the pressure difference.
- a conveying gas for the fine-particulate reduced material is expediently fed into the fluidized bed under pressure, preferably at a pressure higher than the pressure prevailing in the fluidized bed.
- a system for carrying out the process with a melter gasifier with feed and discharge lines for the addition of carbon-containing material, iron-containing reduced fine-particulate material, for the extraction of the reducing gas generated and for the supply of oxygen, and furthermore with a slag and iron melt rack characterized in that a lower section of the melter gasifier for collecting the molten pig iron and the liquid slag and an overlying central section for receiving a fixed bed made of solid carbon carriers and then an upper section for receiving a fluidized bed and a calming space is provided above that in Height of the fluidized bed in the side wall of the melter gasifier at least one mouth of a delivery line for fine-particulate reduced material is provided and that an oxygen supply line is the delivery line for the fine particles n-shaped reduced material penetrates centrally, forming an annular delivery space for
- the feed line for the fine-particulate reduced material can preferably be acted upon with fluidizing gas.
- an oxygen feed lance whose outlet opening for the oxygen comes to lie at the height of the fluidized bed and centrally in cross-section, also advantageously projects into the melting gasifier.
- the feed line for the fine-particulate reduced material expediently leads to the melter gasifier via a fluidized bed lock.
- a line which feeds a conveying gas for the fine-particulate reduced material advantageously opens into the fluidized bed lock.
- FIGS. 1 and 2 each illustrating a melter gasifier in vertical section in a schematic representation.
- a reducing gas is generated from solid carbon-containing material 2, such as coal, and oxygen-containing gas by gasifying the coal 2 is fed via a discharge line 3 to a fluidized bed reactor, not shown, in which fine ore is reduced to sponge iron 4.
- the melter gasifier 1 has a feed line 5 for the solid carbon carriers 2, a feed line 6 for oxygen-containing gases, a feed line 7 for sponge iron and optionally feed lines for carbon carriers which are liquid or gaseous at room temperature, such as hydrocarbons, and for burnt additives.
- Molten pig iron 9 and molten slag 10 collect in the melt-down gasifier 1 in the bottom region 8 and are tapped off by means of a tap 11.
- the iron ore reduced to sponge iron 4 in the fluidized bed reactor is discharged, possibly together with burned aggregates, via a conveyor from the fluidized bed reactor, for example by means of discharge screws, and fed to the melter gasifier 1.
- Both the feed line 5 for the solid carbon carrier 2 and the discharge line 3 for the reducing gas are provided in the dome area 12 of the melter gasifier 1, 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.
- the fine particles 14 entrained with the reducing gas, such as coal and sponge iron are separated and introduced into a fluidized bed lock 16 via a downpipe 15.
- a feed line 17 opens into the fluidized bed lock 16 for reduced fine-particle material, namely for the sponge iron 4 formed from fine ore, which is drawn off from the fluidized bed reactor.
- the fluidized bed 18 formed in the fluidized bed lock 16 from the underflow of the hot cyclone and the fine particulate iron sponge 4 supplied is maintained by means of a fluidizing gas which is fed to the fluidized bed lock 16 via a nozzle bottom 19.
- the supply line 7 for the sponge iron 4 leads from the fluidized bed lock 16 into the melter gasifier 1 at the level of the fluidized bed 21 formed in the melter gasifier 1 above a fixed bed 20 made of carbonaceous material.
- This fluidized bed 21 is formed from fine-particulate carbonaceous material 2 and iron sponge 4.
- the carrier gas for maintaining the fluidized bed 21 is formed by the reducing gas emerging from the fixed bed 20, which is generated by the gasification of the carbon-containing material 2.
- the supply line 7, which is designed as a delivery line for the sponge iron 4 is acted upon at least in the mouth region 22 by fluidizing gas which conveys the sponge iron 4 into the melter gasifier 1.
- An oxygen supply line 23 is provided centrally within the conveying line 7 and coaxially with the latter, the mouth 24 of which protrudes just above the annular mouth 25 of the conveying line 7 into the melter gasifier 1.
- the oxygen jet introduced through the oxygen supply line 23 is peripherally surrounded, ie enclosed, by the iron sponge 4 supplied.
- the sponge iron 4 melts directly in the fluidized bed 21 as a result of the high temperature which arises.
- a plurality of fluidized-bed locks 16 are preferably arranged distributed around the melter gasifier 1, so that there is a radially symmetrical and uniform introduction of the sponge iron 4 over the cross section of the melter gasifier 1.
- further oxygen feed lines 26 can open into the melter gasifier 1, which further increase the effectiveness of the melting.
- an oxygen lance 27 is provided, the mouth 28 of which is provided approximately in the center and just above the fixed bed 20 in the fluidized bed 21.
- the oxygen lance 27 is expediently arranged projecting centrally from above into the melter gasifier 1.
- 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 of about 1050 ° C. is established in the calming space 30 provided above the fluidized bed 21.
- the position of the fixed bed surface can be influenced by the choice of the supplied carbon grain and / or by the distribution of the total oxygen between the fixed bed 20 and the fluidized bed 21.
- a conveying gas which is formed, for example, by cooled reducing gas, is fed into the upper part of the fluidized bed lock 16 via a line 31, etc. in such an amount that a cavity 32 is created in the fluidized bed 21 at the mouth 25 by the momentum of the gas entering.
- the oxygen supply line 23 does not have to be provided coaxially in the supply line 7. It is important that immediately after the sponge iron 4 enters the melter 1 contact with oxygen taking place, so that the melting process of the sponge iron 4 can take place completely in the fluidized bed 21. In order to achieve this, the feed line 7 and the oxygen feed line 23 could be arranged immediately adjacent, even if the best result is achieved if the sponge iron 4 encloses the oxygen jet at least in the region of the mouth 25.
Landscapes
- 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)
Abstract
Description
Claims
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT1964/96 | 1996-11-08 | ||
AT0196496A AT404022B (de) | 1996-11-08 | 1996-11-08 | Verfahren und anlage zur herstellung von flüssigem roheisen oder stahlvorprodukten aus eisenhältigemmaterial |
AT196496 | 1996-11-08 | ||
PCT/AT1997/000239 WO1998021371A1 (de) | 1996-11-08 | 1997-11-05 | Verfahren zur herstellung von flüssigem roheisen oder stahlvorprodukten aus eisenhältigem material |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0882142A1 true EP0882142A1 (de) | 1998-12-09 |
EP0882142B1 EP0882142B1 (de) | 2001-10-04 |
Family
ID=3524870
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97911045A Expired - Lifetime EP0882142B1 (de) | 1996-11-08 | 1997-11-05 | Verfahren zur herstellung von flüssigem roheisen oder stahlvorprodukten aus eisenhältigem material |
Country Status (12)
Country | Link |
---|---|
US (1) | US6454833B1 (de) |
EP (1) | EP0882142B1 (de) |
KR (1) | KR100466631B1 (de) |
AT (1) | AT404022B (de) |
AU (1) | AU733396C (de) |
BR (1) | BR9707117A (de) |
CA (1) | CA2242392A1 (de) |
DE (1) | DE59704790D1 (de) |
RU (1) | RU2192475C2 (de) |
UA (1) | UA44347C2 (de) |
WO (1) | WO1998021371A1 (de) |
ZA (1) | ZA9710040B (de) |
Families Citing this family (7)
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 (de) * | 2012-05-16 | 2013-11-20 | Siemens VAI Metals Technologies GmbH | Verfahren und Vorrichtung zum Einbringen von feinteilchenförmigem Material in die Wirbelschicht eines Reduktionsaggregates |
EP2905345A1 (de) | 2014-02-10 | 2015-08-12 | Primetals Technologies Austria GmbH | Pneumatische Erzchargierung |
ITUA20163986A1 (it) * | 2016-05-31 | 2017-12-01 | Tenova Spa | Metodo ed apparato per la produzione di ghisa, ghisa prodotta secondo detto metodo |
EP3548640B1 (de) * | 2016-12-02 | 2022-09-21 | Tenova S.p.A. | Umwandelbarer metallurgischer ofen und modulare metallurgische anlage mit diesem ofen zur durchführung von produktionsprozessen zur herstellung von metallen im geschmolzenen zustand, insbesondere aus stahl oder gusseisen |
Family Cites Families (25)
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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 (de) * | 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. |
CA2006253C (en) | 1988-12-20 | 1998-08-11 | Rodney James Dry | Pre-reduced iron oxide |
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 (de) | 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 |
-
1996
- 1996-11-08 AT AT0196496A patent/AT404022B/de not_active IP Right Cessation
-
1997
- 1997-11-05 UA UA98073478A patent/UA44347C2/uk unknown
- 1997-11-05 BR BR9707117A patent/BR9707117A/pt not_active IP Right Cessation
- 1997-11-05 RU RU98114827/02A patent/RU2192475C2/ru not_active IP Right Cessation
- 1997-11-05 CA CA002242392A patent/CA2242392A1/en not_active Abandoned
- 1997-11-05 AU AU48557/97A patent/AU733396C/en not_active Ceased
- 1997-11-05 WO PCT/AT1997/000239 patent/WO1998021371A1/de active IP Right Grant
- 1997-11-05 EP EP97911045A patent/EP0882142B1/de not_active Expired - Lifetime
- 1997-11-05 US US09/101,176 patent/US6454833B1/en not_active Expired - Fee Related
- 1997-11-05 DE DE59704790T patent/DE59704790D1/de not_active Expired - Fee Related
- 1997-11-05 KR KR1019980705241A patent/KR100466631B1/ko not_active IP Right Cessation
- 1997-11-07 ZA ZA9710040A patent/ZA9710040B/xx unknown
Non-Patent Citations (1)
Title |
---|
See references of WO9821371A1 * |
Also Published As
Publication number | Publication date |
---|---|
UA44347C2 (uk) | 2002-02-15 |
AU4855797A (en) | 1998-06-03 |
AU733396B2 (en) | 2001-05-10 |
US6454833B1 (en) | 2002-09-24 |
WO1998021371A1 (de) | 1998-05-22 |
BR9707117A (pt) | 1999-07-20 |
RU2192475C2 (ru) | 2002-11-10 |
ZA9710040B (en) | 1998-05-25 |
DE59704790D1 (de) | 2001-11-08 |
EP0882142B1 (de) | 2001-10-04 |
ATA196496A (de) | 1997-12-15 |
KR100466631B1 (ko) | 2005-06-02 |
KR19990077105A (ko) | 1999-10-25 |
AT404022B (de) | 1998-07-27 |
AU733396C (en) | 2002-06-06 |
CA2242392A1 (en) | 1998-05-22 |
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