EP0179734A2 - Procédé et appareil pour la production de minerai de fer réduit, en particulier de la fonte - Google Patents

Procédé et appareil pour la production de minerai de fer réduit, en particulier de la fonte Download PDF

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Publication number
EP0179734A2
EP0179734A2 EP85730134A EP85730134A EP0179734A2 EP 0179734 A2 EP0179734 A2 EP 0179734A2 EP 85730134 A EP85730134 A EP 85730134A EP 85730134 A EP85730134 A EP 85730134A EP 0179734 A2 EP0179734 A2 EP 0179734A2
Authority
EP
European Patent Office
Prior art keywords
level
bustle
reducing gas
shaft furnace
bustle level
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
Application number
EP85730134A
Other languages
German (de)
English (en)
Other versions
EP0179734A3 (en
EP0179734B1 (fr
Inventor
Rolf Dr. Hauk
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
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 Deutsche Voest Alpine Industrieanlagenbau GmbH, Korf Engineering GmbH filed Critical Deutsche Voest Alpine Industrieanlagenbau GmbH
Priority to AT85730134T priority Critical patent/ATE48651T1/de
Publication of EP0179734A2 publication Critical patent/EP0179734A2/fr
Publication of EP0179734A3 publication Critical patent/EP0179734A3/de
Application granted granted Critical
Publication of EP0179734B1 publication Critical patent/EP0179734B1/fr
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
    • C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B11/00—Making pig-iron other than in 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
    • C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
    • C21B13/029—Introducing coolant gas in the shaft 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
    • C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • 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
    • 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
    • C21B2100/60—Process control or energy utilisation in the manufacture of iron or steel
    • 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
    • C21B2100/60—Process control or energy utilisation in the manufacture of iron or steel
    • C21B2100/64—Controlling the physical properties of the gas, e.g. pressure or temperature

Definitions

  • the invention relates to a method for producing a sponge iron or pig iron from iron ore, which is reduced in a reduction shaft furnace by means of a hot reducing gas to sponge iron, which in the shaft furnace at the level of the bustle with a temperature in the range between 750 and 900 ° C and is initiated below the bustle level, and a device for performing this method.
  • Such a method or such a device is known from DE-PS 30 34 539.
  • hot reducing gas is generated in a melter gasifier below the reduction shaft furnace, which in each case after cooling via a central gas inlet and via the outlet openings of the shaft furnace connected to the meltdown gasifier is introduced.
  • the introduction via the outlet openings is an inevitable consequence of the direct connection of the lower part of the reduction shaft furnace to the melter gasifier via downpipes for transferring the sponge iron into the melter gasifier without the use of locks or shut-off devices.
  • Efforts are therefore made to make the proportion of the amount of the reducing gas supplied via the outlet openings in relation to the proportion of the amount of the reducing gas supplied via the central inlet as small as possible by appropriate setting of the respective flow resistances.
  • Both gas streams are cooled to the extent that they have a temperature in the range from 760 ° C to 850 ° C when they enter the reduction shaft furnace.
  • no special measures are taken to increase the carbon content of the sponge iron or pig iron produced.
  • one is often interested in pig iron with a high carbon content. The prerequisite for this is that the pre-reduced iron ore, that is, the sponge iron, has a corresponding carbon enrichment.
  • the temperature of the reducing gas introduced below the bustle level is set to a value below the temperature of the reducing gas introduced at the level of the bustle level.
  • the temperature of the reducing gas introduced below the bustle level is preferably set to a value within the range from approximately 650 to 750 ° C.
  • the residence time of the reduced iron ore in the region between the bustle level and the level of the inlets for the reducing gas lying below the bustle level is chosen to be as long as possible.
  • the ratio of the amount of the reducing gas supplied below the bustle level to the amount of the reducing gas supplied at the level of the bustle level is preferably chosen to be as large as possible.
  • the object is achieved in that the shaft furnace in the area between the bustle level and the inlet openings for the reducing gas has a larger cross section below the bustle level than above the bustle level.
  • the conduction path for the reducing gas supplied below the bustle level preferably has as little resistance as possible and the distance between the bustle level and the level of the reducing gas inlets below the bustle level is as small as possible.
  • Dust on the outer surface of the sponge iron has no advantages, since this dust is rubbed off again in the downstream melter, for example.
  • the formation of cementite is favored at higher temperatures, but this takes place only to a limited extent.
  • the reduction of iron ore is carried out at temperatures of approx. 850 ° C. At these temperatures, only a little carbon can separate from the reducing gas, especially when its CO 2 content is above 3%.
  • the process according to the invention therefore takes place in a two-stage process in which the iron ore is first reduced at a temperature of approximately 850 ° C. and then the sponge iron produced at a lower temperature, ie preferably in the range from 650 ° C. to 750 ° C. ° C is carburized.
  • the device shown schematically in Fig. 1 is used for the direct production of molten pig iron from lumpy iron ore with a.
  • the iron ore is introduced through an inlet 3 into the upper part of the shaft furnace 1, while the blast furnace gas generated in the shaft furnace is led out through an outlet 4 in the upper part of the furnace.
  • the iron ore fed in is reduced essentially above the bustle level 5, at the level of which reducing gas with a known composition and a temperature of preferably 850 ° C. is introduced via inlets 6 arranged in a ring on the circumference of the reduction shaft furnace 1.
  • the reduction shaft furnace 1 and the melter gasifier 2 arranged underneath are connected to one another by downpipes 7.
  • These downpipes 7 open on the one hand in openings in the bottom of the reduction shaft furnace 1 and on the other hand in openings in the upper part of the melter gasifier 2. They are used to transfer the sponge iron produced by reducing the iron ore from the shaft furnace 1 into the meltdown gasifier 2 and to convey the reduction gas generated in the meltdown gasifier 2 in the lower region of the shaft furnace 1.
  • the reducing gas having a temperature of approximately 1000 ° C. in the melter gasifier 2 is cooled down to such an extent that it only has a temperature of approximately 700 ° C. upon entry into the reduction shaft furnace 1.
  • the cooling is carried out by admixing the appropriate amount of cooling gas, which is introduced from a manifold 8 via a line 9 into the downpipes 7.
  • a reducing gas is also led out via a line 10, to which cooling gas is mixed via a line 11, in such a way that the gas has a temperature of about 850 ° C.
  • This is freed of dust particles in a cyclone 12 and then introduced into the reduction shaft furnace 1 in the bustle level 5.
  • the dust accumulating in the cyclone 12 is returned to the melter 2 via a line 13.
  • the carbon separation depends not only on the reaction temperature, but also on the amount of the reducing gas flowing into the reduction shaft furnace 1 through the downpipes 7 and on the length of time that the sponge iron remains in this gas stream, the carbon separation can additionally be dimensioned accordingly by the size below the bustle. Level part of the reduction shaft furnace 1 can be influenced.
  • a further possibility for controlling the carburization in the lower area of the shaft furnace 1 consists in a corresponding setting the flow resistances for the two partial flows of the reducing gas.
  • the pressure loss in the cyclone 12 and the ratio of the cross-sectional area of the shaft furnace 1 below the bustle level 5 to the distance between the bustle level and the inlet openings of the downpipes 7 in the shaft furnace can be increased will. It should be noted that it is not possible to regulate the partial flow quantities by means of regulating flaps in the hot dust-containing gases.
  • the ratio of the amount of the supplied through the downpipes 7 R edutations- gas to the amount of supplied in the Bustle plane 5 reducing gas is between 0.1 and 0.5, preferably at 0.3.
  • the volume resistance for the reducing gas to be supplied in the bustle level 5 is such that it corresponds to a pressure drop between 10 and 100 mbar.
  • the residence time of the reduced iron in the area between the bustle level 5 and the inlet openings of the downpipes 7 in the bottom of the reduction shaft furnace is between 1 and 4 hours, preferably about 3 hours.
  • the long dwell time of the sponge iron in the reducing gas stream rising from the downpipes 7 is achieved by the largest possible volume of the reduction shaft furnace 1 between the bustle level 5 and the level in which the downpipes 7 open into the shaft furnace. It should be noted here that if the distance between the two levels mentioned is increased, the volume of the shaft furnace in this area is increased accordingly, but the flow resistance for the ascending reducing gas increases and thus the amount of gas is reduced accordingly. This problem can be solved in such a way that the shaft cross-section below the bustle level 5 is increased, whereby the volume of this area of the shaft furnace 1 is increased while the flow resistance remains the same.
  • the ratio of the distance between the bustle level 5 and the inlet openings of the downpipes 7 in the bottom of the reduction shaft furnace to the diameter of the shaft furnace in this region is preferably between 0.5 and 1.0.
  • the flow resistances can be further controlled by appropriate dimensioning of the line cross-sections and by an additional pressure loss of the bustle.
  • FIG. 2 are those parts which correspond to those of the device according to FIG. 1. provided with the same reference numerals.
  • the essential difference between these two devices is that the device according to FIG. 2 has a coal gasifier 14 instead of a melter gasifier.
  • This generates the reducing gas required for the reduction shaft furnace 1 from coal and oxygen in a known manner. Since this has a temperature of approximately 1500 ° C. when it emerges from the coal gasifier 14, it is first cooled to 1000 ° C. in a waste heat system 15.
  • the reducing gas stream is then divided into two partial streams, wherein the one partial flow via line 10 after cooling to 850 ° C.

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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)
  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
EP85730134A 1984-10-12 1985-09-30 Procédé et appareil pour la production de minerai de fer réduit, en particulier de la fonte Expired EP0179734B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85730134T ATE48651T1 (de) 1984-10-12 1985-09-30 Verfahren und vorrichtung zur herstellung eines eisenschwamms bzw. roheisens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3437913 1984-10-12
DE3437913A DE3437913C2 (de) 1984-10-12 1984-10-12 Verfahren und Vorrichtung zur Herstellung von Eisenschwamm und/oder flüssigem Roheisen

Publications (3)

Publication Number Publication Date
EP0179734A2 true EP0179734A2 (fr) 1986-04-30
EP0179734A3 EP0179734A3 (en) 1986-12-30
EP0179734B1 EP0179734B1 (fr) 1989-12-13

Family

ID=6248014

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85730134A Expired EP0179734B1 (fr) 1984-10-12 1985-09-30 Procédé et appareil pour la production de minerai de fer réduit, en particulier de la fonte

Country Status (13)

Country Link
US (2) US4854967A (fr)
EP (1) EP0179734B1 (fr)
JP (1) JPS6191308A (fr)
KR (1) KR900004155B1 (fr)
CN (1) CN1004282B (fr)
AT (1) ATE48651T1 (fr)
AU (1) AU562850B2 (fr)
BR (1) BR8505068A (fr)
CA (1) CA1278430C (fr)
DD (1) DD246319A5 (fr)
DE (1) DE3437913C2 (fr)
SU (1) SU1503686A3 (fr)
ZA (1) ZA857594B (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0257173A1 (fr) * 1986-08-12 1988-03-02 VOEST-ALPINE INDUSTRIEANLAGENBAU GESELLSCHAFT m.b.H. Usine sidérurgique ainsi que procédé pour l'exploitation d'une telle usine sidérurgique
EP0257172A1 (fr) * 1986-08-12 1988-03-02 VOEST-ALPINE INDUSTRIEANLAGENBAU GESELLSCHAFT m.b.H. Usine sidérurgique ainsi que procédé pour l'exploitation d'une telle usine sidérurgique
WO1994017214A1 (fr) * 1993-01-26 1994-08-04 'holderbank' Financière Glarus Ag Procede de fabrication de fonte brute et de clinker
GB2281311A (en) * 1993-03-29 1995-03-01 Boc Group Plc Metallurgical processes and apparatus
WO1998001587A1 (fr) * 1996-07-10 1998-01-15 Voest-Alpine Industrieanlagenbau Gmbh Procede pour produire un gaz reducteur servant a la reduction de minerai metallique
WO1998001586A1 (fr) * 1996-07-10 1998-01-15 Voest-Alpine Industrieanlagenbau Gmbh Procede pour produire un gaz reducteur servant a la reduction de minerai metallique
WO1998020172A1 (fr) * 1996-11-06 1998-05-14 Voest-Alpine Industrieanlagenbau Gmbh Procede de production d'eponge de fer
WO1998020171A1 (fr) * 1996-11-06 1998-05-14 Voest-Alpine Industrieanlagenbau Gmbh Procede de production d'eponge de fer par reduction directe de materiaux contenant des oxydes de fer
CN1064084C (zh) * 1996-07-10 2001-04-04 奥地利钢铁联合企业阿尔帕工业设备制造公司 生产用于还原金属矿石的还原气体的方法及设备
RU2684462C1 (ru) * 2015-12-09 2019-04-09 Инститьют Оф Проусес Энжиниринг, Чайниз Экэдеми Оф Сайенсиз Способ преобразования и выделения ванадия, титана и железа из концентрата на основе ванадия-титана-железа в одну стадию
RU2688072C1 (ru) * 2017-10-30 2019-05-17 Паньган Груп Паньчжихуа Айрон Энд Стил Рисёч Инститьют Ко., Лтд. Способ извлечения ванадия и хрома из ванадиево-хромовых шлаков
US10316376B2 (en) 2015-06-24 2019-06-11 Midrex Technologies, Inc. Methods and systems for increasing the carbon content of sponge iron in a reduction furnace
US10508314B2 (en) 2015-06-24 2019-12-17 Midrex Technologies, Inc. Methods and systems for increasing the carbon content of sponge iron in a reduction furnace
US12084730B2 (en) 2020-03-24 2024-09-10 Midrex Technologies, Inc. Methods and systems for increasing the carbon content of direct reduced iron in a reduction furnace

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3438487A1 (de) * 1984-10-17 1986-04-24 Korf Engineering GmbH, 4000 Düsseldorf Verfahren zur herstellung von roheisen
ZA85287B (en) * 1985-01-21 1986-09-24 Korf Engineering Gmbh Process for the production of pig iron
DE3503493A1 (de) * 1985-01-31 1986-08-14 Korf Engineering GmbH, 4000 Düsseldorf Verfahren zur herstellung von roheisen
JPH0689386B2 (ja) * 1986-03-04 1994-11-09 株式会社神戸製鋼所 溶融還元炉発生ガスの改質・除塵方法
DE3629589A1 (de) * 1986-08-30 1988-03-03 Krupp Gmbh Verfahren zur herstellung von eisen aus feinkoernigen eisenerzen
DE3841835C1 (en) * 1988-07-08 1989-11-02 Klimanek Gmbh, 6680 Wiebelskirchen, De Process for the manufacture of re-usable products from metallic sludges containing large amounts of adhering oil or other impurities
US5114122A (en) * 1989-03-08 1992-05-19 Hnat James G Apparatus for heat processing glass batch materials
US6197088B1 (en) 1992-10-06 2001-03-06 Bechtel Group, Inc. Producing liquid iron having a low sulfur content
US5397376A (en) * 1992-10-06 1995-03-14 Bechtel Group, Inc. Method of providing fuel for an iron making process
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
US5958107A (en) * 1993-12-15 1999-09-28 Bechtel Croup, Inc. Shift conversion for the preparation of reducing gas
US20050151307A1 (en) * 2003-09-30 2005-07-14 Ricardo Viramontes-Brown Method and apparatus for producing molten iron
CN101269315B (zh) * 2008-05-12 2011-08-31 河北理工大学 一种用于污水处理的改性球形海绵铁及制备方法
WO2011147006A1 (fr) * 2010-05-24 2011-12-01 Henrique Carlos Pfeifer Agencement pour unité de production d'acier liquide

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US2321310A (en) * 1941-02-14 1943-06-08 Standard Oil Dev Co Smelting iron ore
DE1458797A1 (de) * 1964-05-06 1969-02-27 Enn Vallak Verfahren und Vorrichtung zur Schmelzreduktion von Metallen
US3776533A (en) * 1970-01-28 1973-12-04 Dravo Corp Apparatus for continuous heat processing of ore pellets
US4054444A (en) * 1975-09-22 1977-10-18 Midrex Corporation Method for controlling the carbon content of directly reduced iron
JPS5435813A (en) * 1977-08-25 1979-03-16 Kobe Steel Ltd Controlling method for carbon content of reduced pellets
JPS5847449B2 (ja) * 1978-04-10 1983-10-22 株式会社神戸製鋼所 直接製鉄法
US4248626A (en) * 1979-07-16 1981-02-03 Midrex Corporation Method for producing molten iron from iron oxide with coal and oxygen
US4224057A (en) * 1979-08-20 1980-09-23 Hylsa, S.A. Method for carburizing sponge iron
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
US4584016A (en) * 1982-03-23 1986-04-22 Hylsa, S.A. Method for controlling metallization and carburization in the reduction of metal ores to sponge iron
DE3244744A1 (de) * 1982-11-25 1984-05-30 Klöckner-Werke AG, 4100 Duisburg Verfahren zur direktreduktion von eisenerz im schachtofen
DE3503493A1 (de) * 1985-01-31 1986-08-14 Korf Engineering GmbH, 4000 Düsseldorf Verfahren zur herstellung von roheisen

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0257172A1 (fr) * 1986-08-12 1988-03-02 VOEST-ALPINE INDUSTRIEANLAGENBAU GESELLSCHAFT m.b.H. Usine sidérurgique ainsi que procédé pour l'exploitation d'une telle usine sidérurgique
EP0257173A1 (fr) * 1986-08-12 1988-03-02 VOEST-ALPINE INDUSTRIEANLAGENBAU GESELLSCHAFT m.b.H. Usine sidérurgique ainsi que procédé pour l'exploitation d'une telle usine sidérurgique
WO1994017214A1 (fr) * 1993-01-26 1994-08-04 'holderbank' Financière Glarus Ag Procede de fabrication de fonte brute et de clinker
US5501721A (en) * 1993-01-26 1996-03-26 Holderbank Financiere Glarus Ag Process for producing pig iron and cement clinker
GB2281311A (en) * 1993-03-29 1995-03-01 Boc Group Plc Metallurgical processes and apparatus
GB2281311B (en) * 1993-03-29 1996-09-04 Boc Group Plc Metallurgical processes and apparatus
CN1064084C (zh) * 1996-07-10 2001-04-04 奥地利钢铁联合企业阿尔帕工业设备制造公司 生产用于还原金属矿石的还原气体的方法及设备
WO1998001587A1 (fr) * 1996-07-10 1998-01-15 Voest-Alpine Industrieanlagenbau Gmbh Procede pour produire un gaz reducteur servant a la reduction de minerai metallique
WO1998001586A1 (fr) * 1996-07-10 1998-01-15 Voest-Alpine Industrieanlagenbau Gmbh Procede pour produire un gaz reducteur servant a la reduction de minerai metallique
US6379420B1 (en) 1996-07-10 2002-04-30 Voest-Alpine Industrieanlagenbau Gmbh Method and plant for producing a reducing gas serving for the reduction of metal ore
US6235083B1 (en) 1996-07-10 2001-05-22 Deutsche Voest-Alpine Industrieanlagenbau Gmbh. Method for producing a reducing gas serving for the reduction of metal ore
US6143053A (en) * 1996-11-06 2000-11-07 Voest-Alpine Industrieanlagenbau Gmbh Process for producing sponge iron by direct reduction of iron-oxide-containing material
US6149708A (en) * 1996-11-06 2000-11-21 Voest-Alpine Industrieanlagenbau Gmbh Process for producing sponge iron
WO1998020171A1 (fr) * 1996-11-06 1998-05-14 Voest-Alpine Industrieanlagenbau Gmbh Procede de production d'eponge de fer par reduction directe de materiaux contenant des oxydes de fer
WO1998020172A1 (fr) * 1996-11-06 1998-05-14 Voest-Alpine Industrieanlagenbau Gmbh Procede de production d'eponge de fer
US10316376B2 (en) 2015-06-24 2019-06-11 Midrex Technologies, Inc. Methods and systems for increasing the carbon content of sponge iron in a reduction furnace
US10508314B2 (en) 2015-06-24 2019-12-17 Midrex Technologies, Inc. Methods and systems for increasing the carbon content of sponge iron in a reduction furnace
RU2684462C1 (ru) * 2015-12-09 2019-04-09 Инститьют Оф Проусес Энжиниринг, Чайниз Экэдеми Оф Сайенсиз Способ преобразования и выделения ванадия, титана и железа из концентрата на основе ванадия-титана-железа в одну стадию
RU2688072C1 (ru) * 2017-10-30 2019-05-17 Паньган Груп Паньчжихуа Айрон Энд Стил Рисёч Инститьют Ко., Лтд. Способ извлечения ванадия и хрома из ванадиево-хромовых шлаков
US12084730B2 (en) 2020-03-24 2024-09-10 Midrex Technologies, Inc. Methods and systems for increasing the carbon content of direct reduced iron in a reduction furnace

Also Published As

Publication number Publication date
EP0179734A3 (en) 1986-12-30
SU1503686A3 (ru) 1989-08-23
US4854967A (en) 1989-08-08
ZA857594B (en) 1986-10-29
CA1278430C (fr) 1991-01-02
DD246319A5 (de) 1987-06-03
KR860003350A (ko) 1986-05-23
ATE48651T1 (de) 1989-12-15
EP0179734B1 (fr) 1989-12-13
JPS6191308A (ja) 1986-05-09
KR900004155B1 (ko) 1990-06-18
US4958808A (en) 1990-09-25
AU4821485A (en) 1986-04-17
DE3437913C2 (de) 1987-05-07
CN85108059A (zh) 1986-05-10
AU562850B2 (en) 1987-06-18
CN1004282B (zh) 1989-05-24
BR8505068A (pt) 1986-07-29
DE3437913A1 (de) 1986-04-24

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