DE10101157A1 - Process for producing a mixture of iron ore and smoldering coke - Google Patents

Process for producing a mixture of iron ore and smoldering coke

Info

Publication number
DE10101157A1
DE10101157A1 DE10101157A DE10101157A DE10101157A1 DE 10101157 A1 DE10101157 A1 DE 10101157A1 DE 10101157 A DE10101157 A DE 10101157A DE 10101157 A DE10101157 A DE 10101157A DE 10101157 A1 DE10101157 A1 DE 10101157A1
Authority
DE
Germany
Prior art keywords
reactor
iron ore
granular
smoldering
coke
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.)
Withdrawn
Application number
DE10101157A
Other languages
German (de)
Inventor
Andreas Orth
Martin Hirsch
Peter Weber
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.)
Outokumpu Oyj
Original Assignee
MG Technologies AG
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 MG Technologies AG filed Critical MG Technologies AG
Priority to DE10101157A priority Critical patent/DE10101157A1/en
Priority to PCT/EP2001/014978 priority patent/WO2002055744A2/en
Priority to US10/037,482 priority patent/US20020124690A1/en
Priority to AU10137/02A priority patent/AU1013702A/en
Publication of DE10101157A1 publication Critical patent/DE10101157A1/en
Withdrawn legal-status Critical Current

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
    • C21B13/0033—In fluidised bed furnaces or apparatus containing a dispersion of the material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/10—Reduction of greenhouse gas [GHG] emissions
    • Y02P10/134—Reduction of greenhouse gas [GHG] emissions by avoiding CO2, e.g. using hydrogen

Abstract

A granular coal and a pre-heated granular iron ore are loaded into a carbonising reactor in which temperatures between 800 and 1050 DEG C are produced by supplying oxygen-containing gas and by partial oxidation of the constituents of the coal. The granular solids are kept in the carbonising reactor in a fluidised system. Hot waste gas is guided to a solids separator from the upper region of the reactor. The granular iron ore is pre-heated with the hot waste gas and a hot, granular mixture of iron ore and semi-coke is drawn off as a product from the reactor and/or the separator. Said carbonising reactor can be embodied as a fluidised bed reactor or as a pneumatic transport route. The granular mixture of iron ore and semi-coke is suitable, for example, for a melting reduction process.

Description

Die Erfindung betrifft ein Verfahren zum Erzeugen eines heißen, körnigen Gemisches aus Eisenerz und Schwelkoks.The invention relates to a method for producing a hot, granular mixture from iron ore and coke.

Der Erfindung liegt die Aufgabe zu Grunde, das eingangs genannte Gemisch auf kostengünstige Weise zu erzeugen. Das Erz-Koks-Gemisch soll dabei insbesondere für den Einsatz in einen nachfolgenden Schmelzreduktionsprozess geeignet sein.The invention is based on the object of the aforementioned mixture inexpensive way to produce. The ore-coke mixture is intended in particular for be suitable for use in a subsequent smelting reduction process.

Die Aufgabe wird erfindungsgemäß dadurch gelöst, dass man körnige Kohle und vorgewärmtes körniges Eisenerz einem Schwelreaktor aufgibt, in welchem durch Zufuhr von sauerstoffhaltigem Gas und durch partielle Oxidation der Bestandteile der Kohle Temperaturen im Bereich von 800 bis 1050°C erzeugt werden, wobei man die körnigen Feststoffe in wirbelnder Bewegung hält und aus dem oberen Bereich des Reaktors zu einem Feststoff-Abscheider führt, aus welchem man ein heißes Abgas ableitet, dass man das körnige Eisenerz mit dem heißen Abgas vorwärmt und dass man heißes, körniges Gemisch aus Eisenerz und Schwelkoks als Produkt aus dem Reaktor und/oder aus dem Abscheider abzieht.The object is achieved by the fact that granular coal and preheated granular iron ore gives a smoldering reactor, in which by Supply of oxygen-containing gas and partial oxidation of the constituents of the Coal temperatures in the range of 800 to 1050 ° C can be generated, one being the keeps granular solids in a whirling motion and out of the top of the Reactor leads to a solids separator, from which one hot exhaust gas deduces that one preheats the granular iron ore with the hot exhaust gas and that one hot, granular mixture of iron ore and smoldering coke as a product from the reactor and / or withdraws from the separator.

Der Schwelreaktor kann z. B. als Wirbelschichtreaktor oder als pneumatische Förderstrecke ausgebildet sein. Üblicherweise liegt der Druck im Schwelreaktor im Bereich von 1 bis 10 bar und vorzugsweise 2 bis 7 bar. The smoldering reactor can, for. B. as a fluidized bed reactor or as a pneumatic Be formed conveyor line. The pressure in the smoldering reactor is usually im Range from 1 to 10 bar and preferably 2 to 7 bar.

Zweckmäßigerweise führt man dem Schwelreaktor hochflüchtige Kohle, auch Braunkohle, zu. Die Kohle kann auch wasserhaltig sein. Die Kohle, die man dem Schwelreaktor zuführt, weist Korngrößen bis etwa 10 mm und vorzugsweise bis höchstens etwa 6 mm auf, die Körnungen des Eisenerzes liegen im Bereich bis zu 10 mm und vorzugsweise bis zu 6 mm. Im Produkt aus Eisenerz und Schwelkoks liegt das Gewichtsverhältnis Fe : C üblicherweise im Bereich von 1 : 1 bis 2 : 1.Expediently, highly volatile coal is also fed to the smoldering reactor Lignite, too. The coal can also contain water. The coal that you get Smoldering reactor feeds, has grain sizes up to about 10 mm and preferably up to at most about 6 mm, the grain size of the iron ore is in the range up to 10 mm and preferably up to 6 mm. This lies in the product made from iron ore and coke Fe: C weight ratio usually in the range from 1: 1 to 2: 1.

Ausgestaltungsmöglichkeiten des Verfahrens werden mit Hilfe der Zeichnung erläutert. Die Zeichnung zeigt ein Fließschema des Verfahrens.Design options for the method are explained with the aid of the drawing. The drawing shows a flow diagram of the process.

Einem Schwelreaktor (1) führt man durch die Leitung (2) körnige Kohle und durch die Leitung (3) vorgewärmtes körniges Eisenerz zu. Luft für die partielle Oxidation im Reaktor (1) und für die Verwirbelung und den Transport der Feststoffe wird in der Leitung (5) herangeführt und tritt durch einen Verteiler (6) in den Reaktor (1) ein. Sekundärluft wird in der Leitung (4) herangeführt. Im Reaktor sorgt man für Temperaturen im Bereich von 800 bis 1050°C und zumeist 850 bis 1000°C. Die Verweilzeiten für die Feststoffe im Reaktor (1) liegen etwa im Bereich von 2 bis 20 sec.A smoldering reactor ( 1 ) is fed through the line ( 2 ) granular coal and through the line ( 3 ) preheated granular iron ore. Air for the partial oxidation in the reactor ( 1 ) and for the swirling and transport of the solids is supplied in line ( 5 ) and enters the reactor ( 1 ) through a distributor ( 6). Secondary air is supplied in line ( 4 ). Temperatures in the range of 800 to 1050 ° C and mostly 850 to 1000 ° C are provided in the reactor. The residence times for the solids in the reactor ( 1 ) are approximately in the range from 2 to 20 seconds.

Durch heißes Abgas mitgeführt werden die Feststoffe vom oberen Bereich des Reaktors (1) durch den Kanal (8) zu einem als Zyklon ausgebildeten Abscheider (9) geleitet. Die weitgehend feststofffreien heißen Abgase strömen aufwärts in einen Suspensionswärmeaustauscher (10), dem man durch die Leitung (11) von außen körniges Eisenerz zuführt. Dieses Eisenerz wird im direkten Kontakt mit dem heißen Abgas vorgewärmt und durch die Leitung (12) zu einem Abscheidezyklon (13) geführt, von wo das vorgewärmte Eisenerz durch die Leitung (3) zurück in den Reaktor (1) gelangt. Abgas zieht in der Leitung (14) ab und wird einer nicht dargestellten Gasreinigung zugeführt.The solids are carried along by hot exhaust gas from the upper region of the reactor ( 1 ) through the channel ( 8 ) to a separator ( 9 ) designed as a cyclone. The hot exhaust gases, which are largely free of solids, flow upwards into a suspension heat exchanger ( 10 ), to which granular iron ore is fed from the outside through line (11). This iron ore is preheated in direct contact with the hot exhaust gas and passed through line ( 12 ) to a separating cyclone ( 13 ), from where the preheated iron ore is returned to the reactor ( 1 ) through line (3). Exhaust gas is drawn off in line ( 14 ) and is fed to a gas cleaning system (not shown).

Erzeugtes Erz-Koks-Gemisch zieht man einerseits durch die Leitung (15) aus dem Abscheidezyklon (9) und andererseits durch die Leitung (16) vom unteren Bereich des Reaktors (1) ab. Üblicherweise enthält die Leitung (16) grobkörnigeres Gemisch als die Leitung (15). Ein Syphon (15a) dient zweckmäßigerweise als Drucksperre. In der Leitung (16a) kann man das Feststoffgemisch der weiteren Verwendung z. B. in einem Schmelzreduktionsprozess zuführen. Ein solcher Schmelzreduktionsprozess ist z. B. in den US-Patenten 6083296 und 6143054 beschrieben. Das Eisenerz in den Leitungen (15) und (16) ist gegenüber dem Erz der Leitung (11) bereits teilweise reduziert, wobei üblicherweise 10 bis 40% des im ursprünglichen Eisenerz enthaltenen Sauerstoffs bereits entfernt sind.The ore-coke mixture produced is drawn off on the one hand through the line ( 15 ) from the separating cyclone ( 9 ) and on the other hand through the line ( 16 ) from the lower region of the reactor ( 1 ). The line (16 ) usually contains a more coarse-grained mixture than the line ( 15 ). A siphon ( 15 a) is expediently used as a pressure lock. In line ( 16 a) you can use the solid mixture for further use, for. B. feed in a smelting reduction process. Such a smelting reduction process is e.g. Described in U.S. Patents 6083296 and 6143054. The iron ore in lines ( 15 ) and ( 16 ) is already partially reduced compared to the ore in line ( 11 ), usually 10 to 40% of the oxygen contained in the original iron ore having already been removed.

Beispielexample

In einer der Zeichnung entsprechenden Anlage werden durch die Leitung (11) 170 t/h körniges Eisenerz und durch die Leitung (2) 142 t/h körnige Kohle mit 25,4 Gew.-% Flüchtigen und 17 Gew.-% Feuchte herangeführt. Durch die Leitungen (4) und (5) treten insgesamt 114000 Nm3/h Luft in den Schwelreaktor (1) ein, mit welchem die Temperatur bei 950°C gehalten wird. Durch die Leitung (16a) zieht man 210 t/h Erz- Schwelkoks-Gemisch ab, welches aus 16 Gew.-% Fe2O3, 49 Gew.-% FeO, 28 Gew.-% Kohlenstoff und 7 Gew.-% Asche besteht. Das über die Leitung (14) abgezogene Prozessgas hat eine Temperatur von 518°C und die Zusammensetzung
In a plant corresponding to the drawing, 170 t / h of granular iron ore and line ( 2 ) 142 t / h of granular coal with 25.4% by weight of volatiles and 17% by weight of moisture are supplied through line (11). A total of 114,000 Nm 3 / h of air enter the carbonization reactor ( 1 ) through lines ( 4 ) and ( 5 ), with which the temperature is kept at 950 ° C. 210 t / h of ore / low-temperature coke mixture is drawn off through line ( 16 a), which consists of 16% by weight Fe 2 O 3 , 49% by weight FeO, 28% by weight carbon and 7% by weight. % Ash exists. The process gas withdrawn via line ( 14 ) has a temperature of 518 ° C. and the composition

COCO 11 Vol.-%11% by volume CO2 CO 2 11 Vol.-%11% by volume H2OH 2 O 22 Vol.-%22% by volume H2 H 2 15 Vol.-%15% by volume CH4 CH 4 1 Vol.-%1 vol% N2 N 2 40 Vol.-%40% by volume

Claims (6)

1. Verfahren zum Erzeugen eines heißen, körnigen Gemisches aus Eisenerz und Schwelkoks, dadurch gekennzeichnet, dass man körnige Kohle und vorgewärmtes körniges Eisenerz einem Schwelreaktor aufgibt, in welchem durch Zufuhr von sauerstoffhaltigem Gas und durch partielle Oxidation der Bestandteile der Kohle Temperaturen im Bereich von 800 bis 1050°C erzeugt werden, wobei man die körnigen Feststoffe in wirbelnder Bewegung hält und aus dem oberen Bereich des Reaktors zu einem Feststoff-Abscheider führt, aus welchem man ein heißes Abgas ableitet, dass man das körnige Eisenerz mit dem heißen Abgas vorwärmt und dass man heißes, körniges Gemisch aus Eisenerz und Schwelkoks als Produkt aus dem Reaktor und/oder aus dem Abscheider abzieht.1. A method for producing a hot, granular mixture of iron ore and smoldering coke, characterized in that granular coal and preheated granular iron ore are added to a smoldering reactor, in which temperatures in the range of 800 by supplying oxygen-containing gas and by partial oxidation of the components of the coal up to 1050 ° C, the granular solids being kept in a whirling motion and leading from the upper area of the reactor to a solids separator, from which a hot exhaust gas is discharged, the granular iron ore is preheated with the hot exhaust gas and that hot, granular mixture of iron ore and low-temperature coke is withdrawn as a product from the reactor and / or from the separator. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Schwelreaktor als Wirbelschichtreaktor oder als pneumatische Förderstrecke ausgebildet ist.2. The method according to claim 1, characterized in that the carbonization reactor as Fluidized bed reactor or is designed as a pneumatic conveyor line. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Druck im Schwelreaktor im Bereich von 1 bis 10 bar liegt.3. The method according to claim 1 or 2, characterized in that the pressure in Smoldering reactor is in the range from 1 to 10 bar. 4. Verfahren nach Anspruch 1 oder einem der folgenden, dadurch gekennzeichnet, dass man dem Schwelreaktor hochflüchtige Kohle zuführt.4. The method according to claim 1 or one of the following, characterized in that that one feeds highly volatile coal to the smoldering reactor. 5. Verfahren nach Anspruch 1 oder einem der folgenden, dadurch gekennzeichnet, dass das Produkt aus Eisenerz und Schwelkoks ein Gewichtsverhältnis Fe : C von 1 : 1 bis 2 : 1 aufweist.5. The method according to claim 1 or one of the following, characterized in, that the product of iron ore and low-temperature coke has a weight ratio Fe: C of 1: 1 up to 2: 1. 6. Verfahren nach Anspruch 1 oder einem der folgenden, dadurch gekennzeichnet, dass man das körnige Gemisch aus Eisenerz und Schwelkoks in einen Schmelzreduktionsprozess leitet.6. The method according to claim 1 or one of the following, characterized in, that you can combine the granular mixture of iron ore and smoldering coke into one Smelting reduction process directs.
DE10101157A 2001-01-12 2001-01-12 Process for producing a mixture of iron ore and smoldering coke Withdrawn DE10101157A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE10101157A DE10101157A1 (en) 2001-01-12 2001-01-12 Process for producing a mixture of iron ore and smoldering coke
PCT/EP2001/014978 WO2002055744A2 (en) 2001-01-12 2001-12-18 Method for producing a mixture of iron ore and semi-coke
US10/037,482 US20020124690A1 (en) 2001-01-12 2002-01-04 Process of producing a mixture of iron ore and low-temperature coke
AU10137/02A AU1013702A (en) 2001-01-12 2002-01-11 Process of producing a mixture of iron ore and low-temperature coke

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE10101157A DE10101157A1 (en) 2001-01-12 2001-01-12 Process for producing a mixture of iron ore and smoldering coke

Publications (1)

Publication Number Publication Date
DE10101157A1 true DE10101157A1 (en) 2002-07-18

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Family Applications (1)

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DE10101157A Withdrawn DE10101157A1 (en) 2001-01-12 2001-01-12 Process for producing a mixture of iron ore and smoldering coke

Country Status (4)

Country Link
US (1) US20020124690A1 (en)
AU (1) AU1013702A (en)
DE (1) DE10101157A1 (en)
WO (1) WO2002055744A2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10260734A1 (en) * 2002-12-23 2004-07-15 Outokumpu Oyj Process and plant for the production of Schwelkoks
US7625422B2 (en) 2002-12-23 2009-12-01 Outotec Oyj Method and plant for the heat treatment of solids containing iron oxide using a fluidized bed reactor
US7651547B2 (en) 2002-12-23 2010-01-26 Outotec Oyj Fluidized bed method and plant for the heat treatment of solids containing titanium
US7662351B2 (en) 2002-12-23 2010-02-16 Outotec Oyj Process and plant for producing metal oxide from metal compounds
US7854608B2 (en) 2002-12-23 2010-12-21 Outotec Oyj Method and apparatus for heat treatment in a fluidized bed
US7878156B2 (en) 2002-12-23 2011-02-01 Outotec Oyj Method and plant for the conveyance of fine-grained solids

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004042430A1 (en) * 2004-08-31 2006-03-16 Outokumpu Oyj Fluidized bed reactor for the thermal treatment of vortex substances in a microwave-heated fluidized bed
US9371487B2 (en) * 2007-12-12 2016-06-21 Outotec Oyj Process and plant for producing char and fuel gas
CN101250419B (en) * 2008-03-21 2011-05-25 西安建筑科技大学 Low-temperature dry distillation process with coal gas internal heat

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US2742353A (en) * 1954-11-01 1956-04-17 Exxon Research Engineering Co Iron ore reduction process
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US4094665A (en) * 1977-05-13 1978-06-13 Stora Kopparbergs Bergslags Ab Method for simultaneous combined production of electrical energy and crude iron
JPS5785911A (en) * 1980-11-18 1982-05-28 Ishikawajima Harima Heavy Ind Co Ltd Direct reduction and melting method for iron oxide
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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10260734A1 (en) * 2002-12-23 2004-07-15 Outokumpu Oyj Process and plant for the production of Schwelkoks
DE10260734B4 (en) * 2002-12-23 2005-05-04 Outokumpu Oyj Process and plant for the production of carbon coke
AU2003294753B2 (en) * 2002-12-23 2009-06-25 Outotec Oyj Method and plant for producing low-temperature coke
US7625422B2 (en) 2002-12-23 2009-12-01 Outotec Oyj Method and plant for the heat treatment of solids containing iron oxide using a fluidized bed reactor
US7651547B2 (en) 2002-12-23 2010-01-26 Outotec Oyj Fluidized bed method and plant for the heat treatment of solids containing titanium
US7662351B2 (en) 2002-12-23 2010-02-16 Outotec Oyj Process and plant for producing metal oxide from metal compounds
US7803268B2 (en) 2002-12-23 2010-09-28 Outotec Oyj Method and plant for producing low-temperature coke
US7854608B2 (en) 2002-12-23 2010-12-21 Outotec Oyj Method and apparatus for heat treatment in a fluidized bed
US7878156B2 (en) 2002-12-23 2011-02-01 Outotec Oyj Method and plant for the conveyance of fine-grained solids
US8021601B2 (en) 2002-12-23 2011-09-20 Outotec Oyj Plant for the heat treatment of solids containing titanium
US8048380B2 (en) 2002-12-23 2011-11-01 Outotec Oyj Process and plant for producing metal oxide from metal compounds

Also Published As

Publication number Publication date
AU1013702A (en) 2002-07-18
WO2002055744A2 (en) 2002-07-18
WO2002055744A3 (en) 2004-01-08
US20020124690A1 (en) 2002-09-12

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