EP0048008B1 - Verfahren und Vorrichtung zur direkten Erzeugung von flüssigem Roheisen aus stückigem Eisenerz - Google Patents

Verfahren und Vorrichtung zur direkten Erzeugung von flüssigem Roheisen aus stückigem Eisenerz Download PDF

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Publication number
EP0048008B1
EP0048008B1 EP81107215A EP81107215A EP0048008B1 EP 0048008 B1 EP0048008 B1 EP 0048008B1 EP 81107215 A EP81107215 A EP 81107215A EP 81107215 A EP81107215 A EP 81107215A EP 0048008 B1 EP0048008 B1 EP 0048008B1
Authority
EP
European Patent Office
Prior art keywords
flow
gas
reducing gas
shaft furnace
gasifier
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
EP81107215A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0048008A1 (de
Inventor
Ralph Weber
Bernt Rollinger
Rolf Dr. Hauk
Michael Nagl
Bernhard Rinner
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
Voestalpine AG
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 Voestalpine AG, Deutsche Voest Alpine Industrieanlagenbau GmbH, Korf Engineering GmbH filed Critical Voestalpine AG
Priority to AT81107215T priority Critical patent/ATE8799T1/de
Publication of EP0048008A1 publication Critical patent/EP0048008A1/de
Application granted granted Critical
Publication of EP0048008B1 publication Critical patent/EP0048008B1/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
    • 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 method according to the preamble of patent claim 1. It also relates to a device according to the preamble of patent claim 8.
  • a method and a device of this type are known from DE-B-1 238 941.
  • the known method burns a carbon-containing fuel with an oxygen-containing gas in a melting zone in such a way that an oxidizing atmosphere is created which is the temperature required for the melting process - it is a temperature range from 1600 to 1925 ° C stated - guaranteed.
  • the gas generated in the melting zone is subjected to an enrichment treatment in a gasification zone which is separate from the melting zone and in which an excess of fuel is burned with oxygen.
  • the sponge iron produced in the direct reduction shaft furnace is conveyed by a screw conveyor in the hot state in a direct way via a connecting line into the melting zone, where it is melted.
  • the object of the invention is to enable, in a method and a device of the type mentioned in the introduction, continuously reliable, continuous transport of sponge iron particles heated to just below the softening temperature from the direct reduction shaft furnace into the melter gasifier.
  • the locks are dispensed with, which prevent the reducing gas, which is hot and dirty at over 1200 ° C., from the melter gasifier from entering the reduction shaft furnace through the discharge opening. It has been shown that a small part of the reducing gas generated in the melter gasifier can be introduced into the reduction unit in counterflow to the sponge iron particles if this gas is cooled to temperatures below the softening temperature of the sponge iron being conveyed in front of the discharge device. In the cooling process, it appears essential that this does not reduce the quality of the reducing gas. It has proven to be particularly advantageous to admix sufficient, generally to below 100 ° C., cooled and purified reducing gas.
  • a substantial proportion of the dust carried is deposited in the area of the outlet side of the discharge device and is discharged together with the sponge iron particles by the discharge device.
  • the flow resistance in the flow path of the uncleaned reducing gas must be considerably higher than in the flow path of the cleaned and cooled to the process temperature be.
  • the flow resistance for the first-mentioned flow path is primarily determined by the discharge device and the pouring column up to the injection nozzles for the cleaned and cooled reducing gas.
  • a discharge device should therefore be used which has a relatively high flow resistance, while the flow resistance in the main flow path of the reducing gas should be kept as small as possible by suitable selection of dedusting and cooling devices.
  • Screw conveyors the conveyor part of which is designed as a paddle screw and the outlet opening of which opens directly into a downpipe connected to the molten iron gasifier, have proven to be particularly suitable as the discharge device.
  • the screw conveyors cause a relatively high pressure loss and at the same time form a good dust filter that “cleans itself” together with the sponge iron particles due to the constant discharge of the collected dust particles.
  • the device for the direct production of molten pig iron from lumpy iron ore shown schematically in FIG. 1, contains a melter gasifier 1 of the type described in DE-OS 2 843 303. Above the melter gasifier, a direct reduction shaft furnace 2 suspended in a steel construction, not shown, is arranged Principle is described for example in DE-OS 2 935 707.
  • the direct reduction shaft furnace is supplied with 3-piece iron ore via a gas-tight double bell lock, which sinks in the form of a loose bed in the shaft furnace and is reduced to sponge iron at a temperature between 760 and 850 ° C by means of a hot reducing gas blown in via a central gas inlet 4.
  • the used reducing gas leaves the shaft furnace 2 via an upper gas outlet 5 and can be returned to the reducing gas circuit in a known manner or used in some other way.
  • the hot sponge iron obtained by reduction of the lumpy iron ore is discharged at a temperature of about 750 ° to 800 ° C. from the direct reduction shaft furnace 2 at the bottom and continuously charged into the melter gasifier from above.
  • a coal fluid bed 8 is formed from coal introduced via openings 6 and oxygen-containing gas, in particular oxygen and air, which is blown in through twelve radially arranged nozzles 7, in which even larger iron sponge particles are noticeably braked and in the lower section of the coal fluid bed until they enter a high-temperature zone a significant amount in their temperature is increased and finally melted.
  • a calming space into which radial nozzles 9 open, through which water vapor, hydrocarbons or a reducing gas, for example cooled down to 50 ° C., are blown in to cool the hot reducing gas generated in the melter gasifier.
  • the reducing gas generated in the melter gasifier leaves the melter gasifier above the calming chamber through two gas outlets 10 with a temperature between 1200 and 1400 ° C. and a pressure of approximately 2 bar. It then arrives at a mixing point 11, in which it is brought to the temperature required for direct reduction, usually from 760 to 850 ° C., with a sufficiently low temperature of cooling gas.
  • the mixing point is designed in such a way that a part of the kinetic energy of the cooling gas is recovered as a pressure after mixing with the hot reducing gas supplied by the melter gasifier, and the pressure loss in the hot gas path is thus kept as low as possible.
  • the gas reaches a cyclone separator 12, in which the coke dust and ash entrained with the gas flow are largely separated.
  • the hot gas stream cooled and cleaned to the prescribed process temperature is divided, namely about 60 vol .-% of which is blown as the first partial gas stream 13 through the gas inlet 4 into the reduction zone of the direct reduction shaft furnace 2, while the other part for cooling gas extraction is an injection cooler 14 and then a washing tower 15 is supplied.
  • the cooling gas emerging here is compressed by a compressor 16 and at a temperature of approximately 50 ° C. for regulating the temperature of the hot reducing gas emerging from the melter gasifier of the mixing point 11, for regulating the temperature of the reducing gas in the melter gasifier, the nozzles 9 and also, as described later, a ring line 22 fed.
  • each screw conveyor 17 is arranged radially symmetrically to the central axis of the furnace, which are designed as paddle screws and are supported on one side.
  • the outlet opening 18 of each screw conveyor is connected to a connecting line in the form of a downpipe 19 which opens through the ceiling of the melter gasifier 1 into the settling chamber of this gasifier.
  • six axially symmetrically arranged downpipes are also provided in the present case.
  • a nozzle 21 from a ring line 22 opens into each downpipe, to which the compressor 16 feeds a stream of the reducing gases, which is cooled and cleaned to 50 ° C. and is supplied by the melter gasifier, and is cooled to 50 ° C.
  • a limited gas flow is directly from the melter gasifier via the discharge device 17 for the hot sponge iron in counterflow to the latter authorized.
  • the entire gas stream from unpurified reducing gas flowing directly from the melter gasifier into the downpipes is referred to as second partial gas stream 24.
  • the temperature of the second partial gas stream 24 flowing into the downpipes 19 is cooled to a temperature between 760 and 850 ° C by means of the cooling gas introduced in a controlled quantity via the nozzles 21 before the gas streams reach the reduction shaft furnace via the screw conveyors 17.
  • the cooling gas is supplied in such a way that there is particularly good swirling with the rising raw gas.
  • the dust contained in the rising gas stream when entering the screw conveyor 17 settles essentially in the area of the screw conveyor and is successively conveyed back together with the iron sponge particles back into the relevant downpipe and into the melter gasifier.
  • the second partial gas flow 24 that is to say the raw gas quantity flowing directly upward from the melter gasifier via the six downpipes 19 to a proportion of ma ximal 30% by volume of the total amount of reducing gas introduced into the direct reduction shaft furnace.
  • the flow resistance for the second partial gas flow 24 in the flow path to the reduction zone in the direct reduction shaft furnace that is to say to the level of the gas inlet 4
  • This requirement meets the design of the discharge device 17 as a screw conveyor, the conveyor part is designed as a paddle screw.
  • the flow resistance and thus the pressure losses in the flow path of the first partial gas stream 13 are deliberately kept small.
  • the inventive design of the method and the device enables a direct continuous transport of the hot sponge iron particles from the direct reduction shaft furnace 2 into the melter gasifier 1, without locks or other complex devices for sealing against the hot reducing gas being required, which are at the high temperature and Type of material to be conveyed can only be realized with difficulty with the required operational safety.
  • Fig. 2 one of the six screw conveyors 17 is partially shown in longitudinal section.
  • the screw conveyor is flanged to a socket 31 welded to the jacket of the direct reduction shaft furnace.
  • the socket 31 there is an outlet socket 32 on the outlet side 18 of the conveyor for flange mounting a downpipe 19 (see also FIG. 1).
  • the conveying part envelops a cladding tube 33, which is also flanged to the socket 31.
  • the screw conveyor 17 contains a conveyor part 36 protruding into the furnace and a bearing part 34 flanged out of the furnace on the nozzle 31 and a drive part 44.
  • the conveying part 36 has the shape of an interrupted worm gear formed by paddles 37, the envelope 38 of the paddle screw shown in broken lines tapering conically towards the free end of the shaft 35. This free end extends almost to the middle of the shaft furnace and, thanks to the conical tapering of the envelope, ensures even removal of the bulk material from the bulk column.
  • the shaft 35 is water-cooled and hollow for this purpose with an inner tube 39, which ends just before the free end of the shaft 35 and into which the cooling water is introduced, which is then diverted at the free end and in the annular gap between the central tube 39 and the inner wall of the shaft 35 flows back.
  • the drive 44 is constructed as follows.
  • a ratchet mechanism 45 with a wheel 40 in the teeth of which a pawl 41 engages, which is rotatably attached to a lever 42, which in turn is rotatably seated on the shaft 35, and by means of a hydraulically or pneumatically actuated piston 43 by one predetermined angular movement can be pivoted back and forth.
  • the pawl 41 rotates the wheel 40 by an amount corresponding to the tooth pitch or a multiple of the tooth pitch.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Iron (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Revetment (AREA)
  • Artificial Fish Reefs (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
EP81107215A 1980-09-12 1981-09-12 Verfahren und Vorrichtung zur direkten Erzeugung von flüssigem Roheisen aus stückigem Eisenerz Expired EP0048008B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81107215T ATE8799T1 (de) 1980-09-12 1981-09-12 Verfahren und vorrichtung zur direkten erzeugung von fluessigem roheisen aus stueckigem eisenerz.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3034539 1980-09-12
DE3034539A DE3034539C2 (de) 1980-09-12 1980-09-12 Verfahren und Vorrichtung zur direkten Erzeugung von flüssigem Roheisen aus stückigem Eisenerz

Publications (2)

Publication Number Publication Date
EP0048008A1 EP0048008A1 (de) 1982-03-24
EP0048008B1 true EP0048008B1 (de) 1984-08-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP81107215A Expired EP0048008B1 (de) 1980-09-12 1981-09-12 Verfahren und Vorrichtung zur direkten Erzeugung von flüssigem Roheisen aus stückigem Eisenerz

Country Status (19)

Country Link
US (2) US4409023A (enrdf_load_stackoverflow)
EP (1) EP0048008B1 (enrdf_load_stackoverflow)
JP (1) JPS5848607B2 (enrdf_load_stackoverflow)
KR (1) KR890002797B1 (enrdf_load_stackoverflow)
AT (1) ATE8799T1 (enrdf_load_stackoverflow)
AU (1) AU542484B2 (enrdf_load_stackoverflow)
BR (1) BR8105812A (enrdf_load_stackoverflow)
CA (1) CA1189705A (enrdf_load_stackoverflow)
DD (1) DD201697A5 (enrdf_load_stackoverflow)
DE (1) DE3034539C2 (enrdf_load_stackoverflow)
ES (1) ES8206634A1 (enrdf_load_stackoverflow)
GB (1) GB2084196B (enrdf_load_stackoverflow)
IN (1) IN155081B (enrdf_load_stackoverflow)
MX (1) MX158677A (enrdf_load_stackoverflow)
PH (1) PH18291A (enrdf_load_stackoverflow)
PL (1) PL133135B1 (enrdf_load_stackoverflow)
SU (1) SU1151220A3 (enrdf_load_stackoverflow)
UA (1) UA6580A1 (enrdf_load_stackoverflow)
ZA (1) ZA815863B (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0166679A1 (de) * 1984-06-12 1986-01-02 Deutsche Voest-Alpine Industrieanlagenbau Gmbh Anordnung aus einem Vergaser und Direktreduktionsofen
EP0179734A3 (en) * 1984-10-12 1986-12-30 Korf Engineering Gmbh Process and apparatus for making sponge iron, especially pig iron
EP0299231A1 (de) * 1987-07-13 1989-01-18 Deutsche Voest-Alpine Industrieanlagenbau Gmbh Vorrichtung zur Beschickung eines Einschmelzvergasers mit Vergasungsmitteln und Eisenschwamm
WO1989004445A1 (en) * 1987-11-12 1989-05-18 Voest-Alpine Industrieanlagenbau Gesellschaft M.B. System for conveying bulk materials
EP0210435A3 (en) * 1985-07-02 1989-11-23 Deutsche Voest-Alpine Industrieanlagenbau Gmbh Process for cooling and cleaning generator gas and furnace gas, and apparatus for carrying out this process
EP0578628A1 (de) * 1992-07-07 1994-01-12 Deutsche Voest-Alpine Industrieanlagenbau Gmbh Fördereinrichtung zum dosierten Fördern von Schüttgut

Families Citing this family (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3273996D1 (en) * 1981-04-28 1986-12-04 Kawasaki Steel Co Methods for melting and refining a powdery ore containing metal oxides and apparatuses for melt-refining said ore
CA1204287A (en) * 1982-03-22 1986-05-13 Frank V. Summers Method of generating a reducing gas
NL8201945A (nl) * 1982-05-12 1983-12-01 Hoogovens Groep Bv Werkwijze en inrichting voor de vervaardiging van vloeibaar ijzer uit oxydisch ijzererts.
JPS59107013A (ja) * 1982-12-09 1984-06-21 Ishikawajima Harima Heavy Ind Co Ltd 溶融還元を利用した溶鋼製造法
DE3318005C2 (de) * 1983-05-18 1986-02-20 Klöckner CRA Technologie GmbH, 4100 Duisburg Verfahren zur Eisenherstellung
AT388388B (de) * 1983-11-24 1989-06-12 Voest Alpine Ag Verfahren und vorrichtung zum schmelzen von eisen in einem einschmelzvergaser
AT381954B (de) * 1984-08-16 1986-12-29 Voest Alpine Ag Verfahren zur direktreduktion von eisenoxidhaeltigen materialien
JPS6169910A (ja) * 1984-09-12 1986-04-10 Kobe Steel Ltd 鉄鉱石の流動層還元方法
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
DE3503493A1 (de) * 1985-01-31 1986-08-14 Korf Engineering GmbH, 4000 Düsseldorf Verfahren zur herstellung von roheisen
US4897113A (en) * 1985-09-23 1990-01-30 Hylsa, S.A. Direct reduction process in reactor with hot discharge
US4685964A (en) * 1985-10-03 1987-08-11 Midrex International B.V. Rotterdam Method and apparatus for producing molten iron using coal
JPS6296202A (ja) * 1985-10-21 1987-05-02 極東開発工業株式会社 輸送車の収容容器における側面補強桁構造
DE3607774A1 (de) * 1986-03-08 1987-09-17 Kloeckner Cra Tech Verfahren zur zweistufigen schmelzreduktion von eisenerz
US4701214A (en) * 1986-04-30 1987-10-20 Midrex International B.V. Rotterdam Method of producing iron using rotary hearth and apparatus
BR8707663A (pt) * 1987-02-16 1989-08-15 Mo I Stali I Splavov Processo para preparar um produto intermediario de ferro-carbono para uso na fabricacao de aco e forno para realizacao do mesmo
AT388176B (de) * 1987-07-30 1989-05-10 Voest Alpine Ag Verfahren und anlage zur gewinnung von fluessigem roheisen oder stahlvorprodukten aus stueckigen, eisenoxidhaeltigen einsatzstoffen
US4936908A (en) * 1987-09-25 1990-06-26 Nkk Corporation Method for smelting and reducing iron ores
DE3742156C1 (de) * 1987-12-10 1988-10-13 Korf Engineering Gmbh Verfahren zum Betrieb eines Einschmelzvergasers und Einschmelzvergaser zu dessen Durchfuehrung
US5296015A (en) * 1990-01-09 1994-03-22 Hylsa S.A. De C.V. Method for the pneumatic transport of large iron-bearing particles
AT393901B (de) * 1990-02-09 1992-01-10 Voest Alpine Ind Anlagen Anlage zur behandlung und erschmelzung von metallen, metallverbindungen und/oder metallegierungen oder zur herstellung von calciumcarbid
AT395435B (de) * 1991-02-19 1992-12-28 Voest Alpine Ind Anlagen Verfahren zur inbetriebnahme einer anlage zur herstellung von roheisen oder stahlvormaterial, sowie anlage zur durchfuehrung des verfahrens
US5429658A (en) * 1992-10-06 1995-07-04 Bechtel Group, Inc. Method of making iron from oily steel and iron ferrous waste
US5259864A (en) * 1992-10-06 1993-11-09 Bechtel Group, Inc. Method of disposing of environmentally undesirable material and providing fuel for an iron making process e.g. petroleum coke
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
US5338336A (en) * 1993-06-30 1994-08-16 Bechtel Group, Inc. Method of processing electric arc furnace dust and 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
US5380352A (en) * 1992-10-06 1995-01-10 Bechtel Group, Inc. Method of using rubber tires in an iron making process
DE4317968C2 (de) * 1993-05-28 1995-10-26 Voest Alpine Ind Anlagen Verfahren zur Erzeugung von flüssigem Roheisen aus stückigem Eisenerz
US5958107A (en) * 1993-12-15 1999-09-28 Bechtel Croup, Inc. Shift conversion for the preparation of reducing gas
UA41437C2 (uk) * 1995-01-24 2001-09-17 Фоест-Альпіне Індустріанлагенбау Гмбх Спосіб утилізації пилу, що створюється при відновленні залізної руди, і установка для його здійснення
AT405520B (de) 1996-05-15 1999-09-27 Voest Alpine Ind Anlagen Verfahren zur senkung von verunreinigungen im gasstrom und vorrichtung zur durchführung
DE19623246C1 (de) * 1996-05-30 1997-10-02 Voest Alpine Ind Anlagen Verfahren und Vorrichtung zur Beschickung eines Einschmelzvergasers mit Vergasungsmitteln und Eisenschwamm
DE19625127C2 (de) * 1996-06-12 1998-04-30 Voest Alpine Ind Anlagen Vorrichtung und Verfahren zur Erzeugung von Eisenschwamm
AT403929B (de) 1996-07-10 1998-06-25 Voest Alpine Ind Anlagen Verfahren zum erzeugen eines für eine reduktion von metallerz dienenden reduktionsgases und anlage zur durchführung des verfahrens
AT406299B (de) * 1996-11-12 2000-03-27 Voest Alpine Ind Anlagen Vorrichtung zum austragen bzw. durchmischen von stückigem gut
BR9710465A (pt) * 1997-05-02 1999-08-17 Po Hang Iron & Steel Aparelho e m-todo para fabricar ferro fundido usando forno de calcina-Æo
AUPQ205799A0 (en) * 1999-08-05 1999-08-26 Technological Resources Pty Limited A direct smelting process
KR20050077103A (ko) 2004-01-26 2005-08-01 주식회사 포스코 넓은 입도 분포의 석탄을 직접 사용하는 용철제조장치 및이를 이용한 용철제조방법
RU2350670C2 (ru) * 2006-11-20 2009-03-27 Общество с ограниченной ответственностью Фирма "ДАТА-ЦЕНТР" (ООО Фирма "ДАТА-ЦЕНТР") Способ переработки концентратов из руды, содержащей оксиды железа, титана и ванадия, и устройство для его осуществления
DE102008026835A1 (de) 2008-06-05 2009-12-17 Kurt Himmelfreundpointner Verfahren und Vorrichtung zum Zufördern von förderfähigen Materialien zu Reaktionsöfen
US8177886B2 (en) * 2009-05-07 2012-05-15 General Electric Company Use of oxygen concentrators for separating N2 from blast furnace gas
CN202639805U (zh) * 2011-07-27 2013-01-02 上海宝冶集团有限公司 还原炉agd管道拆装顶升装置
CN106854702B (zh) * 2015-12-09 2019-03-15 中国科学院过程工程研究所 一步转化分离钒钛铁精矿中铁、钒和钛的方法
CN107619941A (zh) * 2017-10-30 2018-01-23 攀钢集团攀枝花钢铁研究院有限公司 从钒铬渣中分离钒与铬的方法
CN109852424B (zh) * 2019-01-02 2021-04-27 新奥科技发展有限公司 一种煤气化炼铁方法和煤气化炼铁气化炉
CN113720142B (zh) * 2021-08-23 2023-01-03 西安交通大学 一种换热均匀的竖冷窑

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2889219A (en) * 1956-12-28 1959-06-02 Inland Steel Co Control method and apparatus for iron ore reduction process
NL223944A (enrdf_load_stackoverflow) * 1957-01-15 1900-01-01
US3704011A (en) * 1971-08-12 1972-11-28 Mintech Corp Discharge mechanism for shaft kiln
SE396616B (sv) * 1973-05-17 1977-09-26 Rolf Kristian Londer Sett och anordning for framstellning av en metallsmelta genom reduktion och smeltning
IT1029175B (it) * 1975-04-28 1979-03-10 Kinglor Metor Spa Estrattore di spugna di ferro da storte
DE2655813B2 (de) * 1976-12-09 1980-10-23 Kloeckner-Humboldt-Deutz Ag, 5000 Koeln Verfahren und Anlage zur direkten und kontinuierlichen Gewinnung von Eisen
US4188022A (en) * 1978-09-08 1980-02-12 Midrex Corporation Hot discharge direct reduction furnace
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
US4248626A (en) * 1979-07-16 1981-02-03 Midrex Corporation Method for producing molten iron from iron oxide with coal and oxygen
MX153453A (es) * 1979-07-16 1986-10-16 Mindres Int Bv Mejoras en metodo y aparato para la produccion de arrabio fundido
US4238226A (en) * 1979-07-16 1980-12-09 Midrex Corporation Method for producing molten iron by submerged combustion
US4235425A (en) * 1979-07-16 1980-11-25 Midrex Corporation Impact bed gasifier-melter
US4288217A (en) * 1980-04-28 1981-09-08 Gte Products Corporation Rotary calciner feed spiral

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0166679A1 (de) * 1984-06-12 1986-01-02 Deutsche Voest-Alpine Industrieanlagenbau Gmbh Anordnung aus einem Vergaser und Direktreduktionsofen
EP0179734A3 (en) * 1984-10-12 1986-12-30 Korf Engineering Gmbh Process and apparatus for making sponge iron, especially pig iron
EP0210435A3 (en) * 1985-07-02 1989-11-23 Deutsche Voest-Alpine Industrieanlagenbau Gmbh Process for cooling and cleaning generator gas and furnace gas, and apparatus for carrying out this process
EP0299231A1 (de) * 1987-07-13 1989-01-18 Deutsche Voest-Alpine Industrieanlagenbau Gmbh Vorrichtung zur Beschickung eines Einschmelzvergasers mit Vergasungsmitteln und Eisenschwamm
WO1989004445A1 (en) * 1987-11-12 1989-05-18 Voest-Alpine Industrieanlagenbau Gesellschaft M.B. System for conveying bulk materials
EP0578628A1 (de) * 1992-07-07 1994-01-12 Deutsche Voest-Alpine Industrieanlagenbau Gmbh Fördereinrichtung zum dosierten Fördern von Schüttgut
DE4318515A1 (de) * 1992-07-07 1994-01-13 Voest Alpine Ind Anlagen Fördereinrichtung zum dosierten Fördern von Schüttgut
AT397378B (de) * 1992-07-07 1994-03-25 Voest Alpine Ind Anlagen Fördereinrichtung zum dosierten fördern von schüttgut
US5480070A (en) * 1992-07-07 1996-01-02 Deutsche Voest-Alpine Industrieanlagenbau Gmbh Conveying arrangement for the dosed conveyance of bulk material

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Publication number Publication date
DE3034539A1 (de) 1982-03-25
KR890002797B1 (ko) 1989-07-31
ES505397A0 (es) 1982-08-16
GB2084196A (en) 1982-04-07
MX158677A (es) 1989-02-27
PL133135B1 (en) 1985-05-31
ZA815863B (en) 1982-08-25
CA1189705A (en) 1985-07-02
DE3034539C2 (de) 1982-07-22
JPS57120607A (en) 1982-07-27
KR830007847A (ko) 1983-11-07
ES8206634A1 (es) 1982-08-16
IN155081B (enrdf_load_stackoverflow) 1984-12-29
JPS5848607B2 (ja) 1983-10-29
AU7476681A (en) 1982-03-18
ATE8799T1 (de) 1984-08-15
DD201697A5 (de) 1983-08-03
UA6580A1 (uk) 1994-12-29
PL232996A1 (enrdf_load_stackoverflow) 1982-04-26
SU1151220A3 (ru) 1985-04-15
US4409023A (en) 1983-10-11
EP0048008A1 (de) 1982-03-24
US4448402A (en) 1984-05-15
BR8105812A (pt) 1982-06-08
GB2084196B (en) 1984-08-08
AU542484B2 (en) 1985-02-21
PH18291A (en) 1985-05-20

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