EP0299231B1 - Vorrichtung zur Beschickung eines Einschmelzvergasers mit Vergasungsmitteln und Eisenschwamm - Google Patents

Vorrichtung zur Beschickung eines Einschmelzvergasers mit Vergasungsmitteln und Eisenschwamm Download PDF

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Publication number
EP0299231B1
EP0299231B1 EP88109788A EP88109788A EP0299231B1 EP 0299231 B1 EP0299231 B1 EP 0299231B1 EP 88109788 A EP88109788 A EP 88109788A EP 88109788 A EP88109788 A EP 88109788A EP 0299231 B1 EP0299231 B1 EP 0299231B1
Authority
EP
European Patent Office
Prior art keywords
furnace
inlets
connecting pipes
melting furnace
sponge iron
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
EP88109788A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0299231A1 (de
Inventor
Bodgan Vuletic
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.)
Deutsche Voest Alpine Industrieanlagenbau GmbH
Original Assignee
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 Deutsche Voest Alpine Industrieanlagenbau GmbH filed Critical Deutsche Voest Alpine Industrieanlagenbau GmbH
Publication of EP0299231A1 publication Critical patent/EP0299231A1/de
Application granted granted Critical
Publication of EP0299231B1 publication Critical patent/EP0299231B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast 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
    • 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

Definitions

  • the invention relates to a device according to the preamble of claim 1.
  • the direct reduction shaft furnace is arranged at a distance above and in alignment with the melter gasifier.
  • a plurality of star-shaped discharge devices in the form of screw conveyors are provided in a horizontal arrangement vertically through the circumferential wall thereof, which discharge the sponge iron from the area of the shaft furnace via associated downpipes, from where it flows directly into the melter gasifier via the downpipes is delivered.
  • the downpipes end in the top area of the melter gasifier, arranged centrally around its central axis and at a distance from and from one another.
  • the inlet openings for the gasification agent preferably coal, as well as the outlets for the reducing gas or the raw gas leaving the melter gasifier.
  • the melter gasifier is directly connected to the reduction shaft furnace through the downpipes. In this way, a large amount of dust gets into the reduction shaft furnace in addition to the non-dedusted gasifier gas.
  • the inlet of the reducing gas to the reduction shaft furnace is introduced at least 2 m above the screw conveyors, the bed serving as a gas barrier in this area. As a result, the height of the reduction shaft furnace is approx. 2 m higher than is absolutely necessary.
  • the dust development directly at the reducing gas outlets is particularly high, and correspondingly high is the pollution of the raw gas with fine dust.
  • they are also limited Conveying capacities of the screw conveyors as a result, as well as the fact that they are only supported on one side, so that this alone also limits the size and the effectiveness of the overall system.
  • the connecting lines for the discharge of the sponge iron from the direct reduction shaft furnace open vertically in its lowest floor area, the dead volume previously considered inevitable by the screw discharge in the lateral direction for the sponge iron in the shaft furnace can be completely avoided and the shaft furnace at least by this amount be brought closer to the melter.
  • the length of the connecting lines is thus shortened not inconsiderably, and there is a greater variation possibility for direct routing which can be adapted more advantageously to the needs the connecting lines between the shaft furnace and the gasifier with the possibility of a more uniform distribution and mixing of the filling supplied to the melter gasifier, in particular also with respect to the middle of the gasifier.
  • the proportion of dust that is discharged with the raw gas through the gas outlets in the melter gasifier, on the other hand, is reduced even further, since the distance between the reducing gas outlets and the centrally combined inlet openings for the gasifying agents and the hot sponge iron in the selected arrangement are much further apart than that could be the case with the known device.
  • the screw conveyors are no longer arranged directly on the direct reduction shaft furnace and thus in the direction of movement of the hot sponge iron in front of the downpipes, but at the end of these connecting lines immediately before the sponge iron enters the melter gasifier, the load on the downpipes and the reduction unit is reduced with the preheated particulate matter, because this dust already deposited at the beginning in the screw passages of the discharge device and from there directly in the shortest possible way is immediately returned to the carburetor.
  • the reduction shaft furnace is approx. 2 m shorter because the dust and gas barrier between the screw conveyor and the gas inlet is no longer necessary. The low sinking speeds in these pipes resulting from the pulling of the hot sponge iron through the connecting lines, of approx.
  • the direct reduction shaft furnace is only indicated in the schematic drawing with respect to its lower base area, while the melter 2 is limited to the representation of its uppermost container area.
  • the connecting lines 4 each end away from the vertical side walls of the shaft furnace, and with their end remote from the outlet 8 in the inlet area of an associated discharge device 7 in the form of a screw conveyor for each connecting line 4.
  • Die Screw conveyors are arranged horizontally in a radial manner in relation to the longitudinal axis of the shaft furnace 1 or the melter gasifier 2 and connect the downpipes from the shaft furnace to inlets 9 in the melter gasifier 2.
  • the minimum length of the connecting lines 4 should be chosen so that the sponge iron column supported by them withstands the pressure difference between the shaft furnace and the carburetor, i.e. serves as a barrier between them. This minimum length should be at least 2 m. Furthermore, the inner diameter of the connecting lines 4 should be dimensioned such that bridges caused by the sponge iron are excluded with certainty. Therefore, inner diameters of at least 0.5 m, e.g. 0.8 m used.
  • a dome attachment 5 is provided on the top area of the melter gasifier 2, that is to say the upper end of the same, centrally to and in the direction of the longitudinal axis mentioned, which specifies a bell-like expansion of the melter gasifier at this point.
  • the inlet opening 3 for the gasification agent i.e. coal, coke or the like.
  • the inlets 9, which directly form the discharge openings of the screw conveyors 7, are perpendicular thereto and thus open into the area of the cylindrical side wall of the dome attachment 5.
  • the inlet openings 9 and 3 is located relatively far away in the top region of the melter gasifier wall, which in turn is circular-arc-shaped Arrangement of the outlets 6 for the raw or reducing gas.
  • the rate of entry of the sponge iron into the melter gasifier 2 is directly influenced by the screw conveyor 7, i.e. determined solely by their discharge, the sinking speed of the sponge iron within the downpipes 4 no longer playing a role in this.
  • the sponge iron together with the gasification agent falls largely centrally into the coal fluidized bed or also a fixed bed of the melter gasifier 1, from which a largely homogeneous division takes place automatically.
  • the outlets 6, which deliver a low-dust raw gas from the interior of the gasifier, are located from the central drop area of the coal and the sponge iron, although still arranged in the top area of the melting gasifier, but sufficiently distant.
  • dome attachments 5 can be arranged in the top region of such a carburetor shape.
  • a dome attachment is dispensed with, while maintaining the vertical outlets 8 in the bottom of the direct reduction shaft furnace 1 for the connecting lines 4, the ends of which opposite the outlets 8 open into discharge devices 7 arranged radially to the longitudinal axis and horizontally.
  • the discharge devices 7 designed as screw conveyors otherwise correspond in arrangement and design to those according to FIG. 1.
  • the discharge ends of the screw conveyors according to the embodiment according to FIG. 2 open into short angled, but essentially vertical pre-connections 10, which over a very short distance into the Open the interior of the melting gasifier 1.
  • the inlet opening 3 for the gasifying agent in alignment and in the direction of the longitudinal axis of the melter gasifier 2 or the direct reduction shaft furnace 1.
  • the arrangement can be made such that the distance between the inlet opening 3 and the inlets of the pipe socket 10 arranged around it is small compared to the distance to the outlets 6 for the raw or reducing gas. This results in equivalent advantages to the embodiment according to FIG. 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Iron (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
EP88109788A 1987-07-13 1988-06-20 Vorrichtung zur Beschickung eines Einschmelzvergasers mit Vergasungsmitteln und Eisenschwamm Expired - Lifetime EP0299231B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3723137A DE3723137C1 (de) 1987-07-13 1987-07-13 Vorrichtung zur Beschickung eines Einschmelzvergasers mit Vergasungsmitteln und Eisenschwamm
DE3723137 1987-07-13

Publications (2)

Publication Number Publication Date
EP0299231A1 EP0299231A1 (de) 1989-01-18
EP0299231B1 true EP0299231B1 (de) 1991-07-24

Family

ID=6331484

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88109788A Expired - Lifetime EP0299231B1 (de) 1987-07-13 1988-06-20 Vorrichtung zur Beschickung eines Einschmelzvergasers mit Vergasungsmitteln und Eisenschwamm

Country Status (12)

Country Link
US (1) US4898366A (ko)
EP (1) EP0299231B1 (ko)
JP (1) JPS6433494A (ko)
KR (1) KR960001711B1 (ko)
AT (1) AT396254B (ko)
AU (1) AU610190B2 (ko)
BR (1) BR8803524A (ko)
CA (1) CA1310827C (ko)
DD (1) DD274449A5 (ko)
DE (2) DE3723137C1 (ko)
SU (1) SU1591815A3 (ko)
ZA (1) ZA884677B (ko)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5354356A (en) * 1992-10-06 1994-10-11 Bechtel Group Inc. Method of providing fuel for an iron making process
US6197088B1 (en) 1992-10-06 2001-03-06 Bechtel Group, Inc. Producing liquid iron having a low sulfur content
US5320676A (en) * 1992-10-06 1994-06-14 Bechtel Group, Inc. Low slag iron making process with injecting coolant
US5397376A (en) * 1992-10-06 1995-03-14 Bechtel Group, Inc. Method of providing fuel for an iron making process
US5958107A (en) * 1993-12-15 1999-09-28 Bechtel Croup, Inc. Shift conversion for the preparation of reducing gas
DE19623246C1 (de) 1996-05-30 1997-10-02 Voest Alpine Ind Anlagen Verfahren und Vorrichtung zur Beschickung eines Einschmelzvergasers mit Vergasungsmitteln und Eisenschwamm
DE102008026835A1 (de) 2008-06-05 2009-12-17 Kurt Himmelfreundpointner Verfahren und Vorrichtung zum Zufördern von förderfähigen Materialien zu Reaktionsöfen
EP2586877B1 (en) * 2010-06-23 2018-08-29 Posco Furnace having even distribution of gas
AT511206B1 (de) 2011-05-19 2012-10-15 Siemens Vai Metals Tech Gmbh Verfahren und vorrichtung zum chargieren von kohlehaltigem material und eisenträger-material
CN103409577B (zh) * 2013-08-10 2015-09-09 山西鑫立能源科技有限公司 连续外热式还原气直接还原铁方法
EP3150729A1 (de) 2015-10-02 2017-04-05 Primetals Technologies Austria GmbH Verfahren und vorrichtung zum chargieren von eisenträger-material

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB373298A (en) * 1930-03-06 1932-05-26 Emil Gustaf Torvald Gustafsson Improvements in or relating to processes for producing metal sponge
US2368508A (en) * 1940-08-03 1945-01-30 Wile Service Inc Process of treating ores and electric furnace therefor
FR1154525A (fr) * 1955-06-16 1958-04-11 Didier Werke Ag Procédé pour la récupération du fer métallique dans la boue rouge résultant dela production de l'aluminium
IT1029175B (it) * 1975-04-28 1979-03-10 Kinglor Metor Spa Estrattore di spugna di ferro da storte
US4316739A (en) * 1979-07-16 1982-02-23 Midrex Corporation Method for producing molten iron
US4286775A (en) * 1979-07-16 1981-09-01 Midrex Corporation Apparatus for producing molten iron from iron oxide with coal and oxygen
US4248626A (en) * 1979-07-16 1981-02-03 Midrex Corporation Method for producing molten iron from iron oxide with coal and oxygen
US4270740A (en) * 1979-07-16 1981-06-02 Midrex Corporation Apparatus for producing molten iron by submerged combustion
MX153453A (es) * 1979-07-16 1986-10-16 Mindres Int Bv Mejoras en metodo y aparato para la produccion de arrabio fundido
DE3034539C2 (de) * 1980-09-12 1982-07-22 Korf-Stahl Ag, 7570 Baden-Baden Verfahren und Vorrichtung zur direkten Erzeugung von flüssigem Roheisen aus stückigem Eisenerz
DE3422185A1 (de) * 1984-06-12 1985-12-12 Korf Engineering GmbH, 4000 Düsseldorf Anordnung aus einem vergaser und direktreduktionsofen
DE3737271A1 (de) * 1986-12-23 1988-07-07 Korf Engineering Gmbh Einschmelzvergaser
AT390622B (de) * 1988-10-25 1990-06-11 Voest Alpine Ind Anlagen Verfahren und anlage zur herstellung von fluessigem roheisen

Also Published As

Publication number Publication date
EP0299231A1 (de) 1989-01-18
JPH0239581B2 (ko) 1990-09-06
AU1845288A (en) 1989-01-19
DE3723137C1 (de) 1989-03-16
DD274449A5 (de) 1989-12-20
KR960001711B1 (ko) 1996-02-03
AT396254B (de) 1993-07-26
DE3863862D1 (de) 1991-08-29
US4898366A (en) 1990-02-06
JPS6433494A (en) 1989-02-03
ATA178988A (de) 1992-11-15
CA1310827C (en) 1992-12-01
SU1591815A3 (ru) 1990-09-07
BR8803524A (pt) 1989-02-08
KR890002425A (ko) 1989-04-10
AU610190B2 (en) 1991-05-16
ZA884677B (en) 1989-03-29

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