EP0195770B1 - Verfahren zur Herstellung von flüssigem Roheisen oder Stahlvorprodukten - Google Patents

Verfahren zur Herstellung von flüssigem Roheisen oder Stahlvorprodukten Download PDF

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Publication number
EP0195770B1
EP0195770B1 EP86890063A EP86890063A EP0195770B1 EP 0195770 B1 EP0195770 B1 EP 0195770B1 EP 86890063 A EP86890063 A EP 86890063A EP 86890063 A EP86890063 A EP 86890063A EP 0195770 B1 EP0195770 B1 EP 0195770B1
Authority
EP
European Patent Office
Prior art keywords
oxygen
fixed bed
containing gas
gas
bed
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
Application number
EP86890063A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0195770A1 (de
Inventor
Rolf Dr Dipl Ing Hauk
Werner Dr Dipl Ing 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
Deutsche Voest Alpine Industrieanlagenbau GmbH
Original Assignee
Voest Alpine Industrienlagenbau GmbH
Deutsche Voest Alpine Industrieanlagenbau GmbH
Korf Engineering 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 Voest Alpine Industrienlagenbau GmbH, Deutsche Voest Alpine Industrieanlagenbau GmbH, Korf Engineering GmbH filed Critical Voest Alpine Industrienlagenbau GmbH
Publication of EP0195770A1 publication Critical patent/EP0195770A1/de
Application granted granted Critical
Publication of EP0195770B1 publication Critical patent/EP0195770B1/de
Expired legal-status Critical Current

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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
    • 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

Definitions

  • the invention relates to a process for the production of molten pig iron or intermediate steel products from particulate ferrous material, in particular from pre-reduced iron sponge, and for the production of reducing gas in a melter gasifier by adding coal and by blowing in oxygen-containing gas by means of nozzle pipes penetrating the wall of the melter gasifier, one of which being a fixed bed of coke particles through which the oxygen-containing gas flows and a fluidized bed (fluidized bed) made of coke particles above it, and the iron-containing material is given to the fluidized bed.
  • the invention aims at avoiding the difficulties described and has as its object to avoid reoxidation of the molten products in the melter and to reduce the primary energy requirement.
  • This object is achieved according to the invention in a method of the type mentioned at the outset in that a non-gassed fixed bed of coke particles is provided below the fixed bed through which oxygen-containing gas flows, and in that the fluidized bed is flowed through by oxygen-free or oxygen-poor gas over the fixed bed through which oxygen-containing gas flows.
  • the two fixed bed zones are built up by coke particles with a grain size of 20 to 60 mm, essentially by particles in the size between 30 and 40 mm, while the smaller particles are in the fluidized bed zone.
  • the height of the fixed bed through which oxygen-containing gas flows is expediently set and maintained via the particle size distribution of the coal introduced into the melter gasifier.
  • the fixed bed can be particularly pronounced if the grain classification of the coarse fraction of the coal introduced is within narrow limits.
  • the refractory lined melter 1 has a lower section 1 ', a middle section 1 "and an enlarged upper section 1"'.
  • the lower section 1 ' is intended for receiving the molten bath.
  • feed lines (nozzle pipes) 2 for oxygen-containing gas and in the upper extended section 1 '" feed lines 3 for lumpy coal or coke and 4 for pre-reduced iron particles, such as sponge iron.
  • at least one discharge 5 for the reducing gas formed is provided in the upper section.
  • the fixed beds (fixed bed zones) designated I and II are formed from coarser coke particles.
  • the melt pool that accumulates underneath consists of the molten metal 6 and the slag 7, wherein a tapping can be provided for both components I does not have a gas supply, so it is not gas-filled, above which the fixed bed II is formed, in which the coke particles are flowed through by the oxygen-containing gas flowing in from the supply lines 2 to form carbon monoxide is also not equipped with any gas supply lines. It is only kept in motion by the carbon monoxide-containing reaction gases generated in fixed bed II. Small coal or coke particles remain in the fluidized bed zone 111. Larger coal or Coke particles for which the empty pipe velocity of the gas flow is below the loosening point for a corresponding particle bed are only braked, fall through the fluid bed III and settle to form the fixed bed II or the fixed bed I.
  • zone III As a result of the fact that zone III is not exposed to oxygen or oxygen-containing gas, there is a reducing gas atmosphere in this zone, as a result of which the carbon content of the pre-reduced iron-containing particles, such as sponge iron, introduced from above is retained.
  • the heat required for the process is generated in a known manner by gasifying coal, communicated to the sponge iron to be melted in countercurrent, and the melt formed, consisting of slag and metal, is overheated.
  • the overheating must be so strong (approx. To 1600 ° C) that it covers the heat required for the endothermic reactions taking place in the fixed bed zones I and II and the melt collected in the lower part of the melter gasifier still has a sufficient temperature for further treatment .
  • Another advantage of the method according to the invention is that the assembly or instrumentation effort is lower because, compared to the method of operation mentioned at the beginning, a nozzle plane is eliminated.
  • Gas temperature of 1800 ° C or a temperature of the iron-containing particles of 1200 to 1300 ° C and at the transition from Zone II to Zone I set a temperature of the iron carrier of 1600 ° C.
  • the slag or metal bath had a temperature of 1400 to 1500 ° C; in the expanded upper section 1 "'of the melter gasifier, a gas temperature of 1500 ° C. was measured at the upper limit of the fluidized bed III, and a gas temperature of 1100 ° C. in the so-called calming zone above it.
  • the reducing gas was discharged 5 in a quantity of 1330 m 3 ( deducted under normal conditions) / t pig iron, the pig iron formed had a C content of 3.5%, an Si content of 0.3% and an S content of 0.1%.

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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)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
EP86890063A 1985-03-21 1986-03-17 Verfahren zur Herstellung von flüssigem Roheisen oder Stahlvorprodukten Expired EP0195770B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0084685A AT382390B (de) 1985-03-21 1985-03-21 Verfahren zur herstellung von fluessigem roheisen oder stahlvorprodukten
AT846/85 1985-03-21

Publications (2)

Publication Number Publication Date
EP0195770A1 EP0195770A1 (de) 1986-09-24
EP0195770B1 true EP0195770B1 (de) 1988-12-14

Family

ID=3501117

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86890063A Expired EP0195770B1 (de) 1985-03-21 1986-03-17 Verfahren zur Herstellung von flüssigem Roheisen oder Stahlvorprodukten

Country Status (15)

Country Link
US (1) US4708736A (uk)
EP (1) EP0195770B1 (uk)
JP (1) JPS61221315A (uk)
KR (1) KR930007308B1 (uk)
CN (1) CN86101817B (uk)
AT (1) AT382390B (uk)
AU (1) AU574906B2 (uk)
BR (1) BR8601242A (uk)
CA (1) CA1268633A (uk)
CS (1) CS264273B2 (uk)
DD (1) DD247025A5 (uk)
DE (1) DE3661424D1 (uk)
IN (1) IN166414B (uk)
SU (1) SU1473716A3 (uk)
ZA (1) ZA861922B (uk)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT386007B (de) * 1986-10-30 1988-06-27 Voest Alpine Ag Verfahren und anlage zur gewinnung von metallen bzw. metallegierungen
AT386006B (de) * 1986-10-30 1988-06-27 Voest Alpine Ag Verfahren und anlage zur gewinnung von metallen bzw. metallegierungen
DE3787017T2 (de) * 1987-06-30 1993-11-25 Kawasaki Steel Co Verfahren und Vorrichtung zur Erzeugung von flüssigem Metall von Erzpartikeln.
BE1006828A3 (fr) * 1991-07-12 1995-01-03 Elsen Tooling Ireland Ltd Procede en vue de la preparation de metaux, et en particulier de fer, a partir de minerais oxydes, a une temperature de reduction quelconque, dans un four de reduction a gouttes.
US5354356A (en) * 1992-10-06 1994-10-11 Bechtel Group Inc. Method of providing fuel for an iron making process
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
US6197088B1 (en) 1992-10-06 2001-03-06 Bechtel Group, Inc. Producing liquid iron having a low sulfur content
US5958107A (en) * 1993-12-15 1999-09-28 Bechtel Croup, Inc. Shift conversion for the preparation of reducing gas
UA43905C2 (uk) 1996-11-08 2002-01-15 Фоест-Альпіне Індустріанлагенбау Гмбх Спосіб отримання розплавленого чавуну або напівфабрикатів сталі
AT503593B1 (de) * 2006-04-28 2008-03-15 Siemens Vai Metals Tech Gmbh Verfahren zur herstellung von flüssigem roheisen oder flüssigen stahlvorprodukten aus feinteilchenförmigem eisenoxidhältigem material
AT506042A1 (de) 2007-11-13 2009-05-15 Siemens Vai Metals Tech Gmbh Verfahren zum schmelzen von roheisen und stahlvorprodukten in einem schmelzvergaser

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3948645A (en) * 1973-04-30 1976-04-06 Boliden Aktiebolag Method of carrying out heat-requiring chemical and/or physical processes in a fluidized bed
SE457265B (sv) * 1981-06-10 1988-12-12 Sumitomo Metal Ind Foerfarande och anlaeggning foer framstaellning av tackjaern
AT378970B (de) * 1982-12-21 1985-10-25 Voest Alpine Ag Verfahren und vorrichtung zur herstellung von flùssigem roheisen oder stahlvorprodukten
AT376241B (de) * 1983-01-03 1984-10-25 Voest Alpine Ag Verfahren zum schmelzen von zumindest teilweise reduziertem eisenerz
DD226157A3 (de) * 1983-06-01 1985-08-14 Bandstahlkombinat Matern Veb Verfahren zur erzeugung von fluessigem roheisen und reduktionsgas in einem abstichgenerator
DE3438487A1 (de) * 1984-10-17 1986-04-24 Korf Engineering GmbH, 4000 Düsseldorf Verfahren zur herstellung von roheisen
SU1479006A3 (ru) * 1984-11-26 1989-05-07 Фоест-Альпине (Фирма) Способ получени жидкого чугуна или продуктов стали и восстановительного газа в плавильном газификаторе
DE3504346C2 (de) * 1985-02-06 1986-11-27 Korf Engineering GmbH, 4000 Düsseldorf Verfahren und Vorrichtung zur Erzeugung von Eisenschwammpartikeln und flüssigem Roheisen

Also Published As

Publication number Publication date
CS196586A2 (en) 1988-09-16
CN86101817B (zh) 1988-07-06
KR930007308B1 (ko) 1993-08-05
CN86101817A (zh) 1986-11-05
AT382390B (de) 1987-02-25
DD247025A5 (de) 1987-06-24
ATA84685A (de) 1986-07-15
DE3661424D1 (en) 1989-01-19
EP0195770A1 (de) 1986-09-24
SU1473716A3 (ru) 1989-04-15
CA1268633A (en) 1990-05-08
ZA861922B (en) 1986-11-26
AU574906B2 (en) 1988-07-14
KR860007386A (ko) 1986-10-10
US4708736A (en) 1987-11-24
JPS61221315A (ja) 1986-10-01
BR8601242A (pt) 1986-12-02
CS264273B2 (en) 1989-06-13
IN166414B (uk) 1990-05-05
JPS648044B2 (uk) 1989-02-13
AU5466486A (en) 1986-09-25

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