EP1275739A2 - Procédé et installation d'élaboration de métal en particulier de l'acier à partir d'oxydes métalliques à grains fins - Google Patents

Procédé et installation d'élaboration de métal en particulier de l'acier à partir d'oxydes métalliques à grains fins Download PDF

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Publication number
EP1275739A2
EP1275739A2 EP02013291A EP02013291A EP1275739A2 EP 1275739 A2 EP1275739 A2 EP 1275739A2 EP 02013291 A EP02013291 A EP 02013291A EP 02013291 A EP02013291 A EP 02013291A EP 1275739 A2 EP1275739 A2 EP 1275739A2
Authority
EP
European Patent Office
Prior art keywords
reduction reactor
gas
reactor
metal oxide
transport
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Withdrawn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
EP02013291A
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German (de)
English (en)
Other versions
EP1275739A3 (fr
Inventor
Alfred Dipl.-Ing. Dr. Kropf
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
Original Assignee
Voest Alpine Industrienlagenbau 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 filed Critical Voest Alpine Industrienlagenbau GmbH
Publication of EP1275739A2 publication Critical patent/EP1275739A2/fr
Publication of EP1275739A3 publication Critical patent/EP1275739A3/fr
Withdrawn legal-status Critical Current

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    • 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
    • C21B13/143—Injection of partially reduced ore into a molten bath
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/004—Making spongy iron or liquid steel, by direct processes in a continuous way by reduction from ores
    • 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 plant and a method for metal production, preferably for direct steelmaking, of fine-grained metal oxide, in particular iron-containing ore, wherein the metal oxide introduced into a reduction reactor and in this reduction reactor by a predominantly formed from H 2 , preferably at least 90% by volume H. 2 -containing, reducing gas is at least partially reduced, and subsequently in a melt reactor, preferably to steel, is melted.
  • a transport reduction reactor is distinguished from the Operation of a conventional shaft furnace, as taught in EP00106747A1, especially characterized in that, for example, by the more uniform distribution of the starting materials in the reducing gas, an energetically and / or kinetically more favorable course of the Reduction can be achieved. In this way, you will have significant energy costs saved.
  • Embodiments especially characterized in that the fine-grained Feedstock in the directed transport gas stream of the transport reduction reactor is brought in and transported by this.
  • a transport reduction reactor provides a particular embodiment Reactor for the reduction of metal oxide with a transporting carrier gas.
  • a carrier gas can according to a preferred embodiment of the invention Process any suitable gas, in particular an at least partially inert gas be used. According to a preferred embodiment of the invention is as Carrier gas used an at least partially reducing gas.
  • Carrier gas used an at least partially reducing gas for example the composition of the carrier gas not for at least partial reduction of the metal ore in the transport reduction reactor is sufficient for a supply of sufficient amount of reducing gas in the transport reduction reactor to to care.
  • the CO 2 emission is reduced or, ideally, completely prevented.
  • the partially consumed reducing gas contains H 2 O in addition to H 2 , which significantly simplifies the treatment of exhaust gas compared to systems in which, for example, a CO and H 2 -containing reducing gas is used.
  • the inventive method is characterized by its particularly economical Operating mode, as feedstocks fine ore and as reducing agent hydrogen be used. Hydrogen is currently cheap from natural gas or coal too produce. In the future, an economic production of hydrogen by means of Electrolysis or succeed in bioreactors.
  • Metal oxide particles at least partially by the carrier gas against gravity transported. This form of transport leads to a particularly advantageous Distribution of the metal oxide particles, as well as a particularly efficient reduction the same.
  • a fine Distribution of the metal oxide in the carrier gas stream, in particular the Reduction gas stream is provided, one over the prior art significantly faster and more complete reduction of the fine metal oxides can be achieved.
  • embodiments are with, on or in the Transport reduction reactor arranged, injectors and / or feeding devices possible, in each case the metal oxide in or against the flow direction of the Carrier gas stream, in particular the reducing gas stream, bring in this.
  • the role of the metal oxide in the carrier gas flow may be at different angles take place, for example, under 135 ° (225 °) or 120 ° (210 °) against the Flow direction (0 ° corresponds to flow direction).
  • the reduction in the transport reduction reactor is below a temperature of 1000 ° C, preferably at a temperature of 500 to 900 ° C, more preferably from 700 to 900 ° C, carried out.
  • the fine-grained metal oxide is introduced with a further carrier gas into the transport reduction reactor, in particular injected under pressure, wherein the further carrier gas preferably at least 50 vol% H 2 , more preferably at least 75 vol% H 2 , in particular at least 90 Vol% H 2 , contains.
  • the at least partially reduced metal oxide for example, introduced into a melt reactor and processed into liquid steel become.
  • direct steelmaking is particularly efficient Form, in particular in only one process stage, feasible.
  • the reduction gas which in turn is at least partially purified of solid particles in the gas-solid separation apparatus, is subjected to gas treatment, whereby impurities, in particular H 2 O, are at least partially separated, and possibly used H 2 is at least partially replaced ,
  • a complete replacement of the spent H 2 is provided. This prevents harmful accumulation of the reducing gas in H 2 O in the system.
  • the separated in the gas-solid separation device is the separated in the gas-solid separation device, at least partially reduced, metal oxide from the gas-solid separation device, in particular by a hydrogen flow pump, sucked off.
  • a hydrogen flow pump is by definition one Pump for introducing reducing gas and fine solid into a reaction vessel, in a preferred embodiment analogous to a water jet pump is working.
  • a hydrogen flow pump for example by a, flowed through by hydrogen, venturi realized in the by Exploitation of the pressure difference due to the different Flow cross sections creates a pumping effect and in a simple way the fine Solids, for example, the finely particulate metal oxide, sucked and in the appropriate vessel and / or introduced into the corresponding reactor can.
  • the at least partially reduced metal oxide is introduced into a melt reactor, and under the action of a plasma torch and / or an electric arc melted.
  • an H 2 -containing gas is fed to the melt reactor, which is optionally at least partially ionized in the melt reactor and optionally subsequently introduced as reducing gas into the transport reduction reactor.
  • a hot plasma is generated for melting the fine-grained metal oxides.
  • energy and costs are saved by using the, preferably hot, H 2 -containing exhaust gas of the melt reactor as transport gas and carrier gas of the transport reduction reactor.
  • the method according to the invention is in the melt reactor less than 50% by volume, in particular less than 10% by volume, the, used in the reduction chamber, carrier and / or reducing gas introduced, and for example from the melt reactor in the Transport reduction reactor, preferably as a carrier gas and / or reducing gas converted.
  • the amount of metal oxide which enters the transport reduction reactor is introduced, and / or the flow and / or amount of the carrier and / or Reduction gas in the transport reduction reactor itself by a Hydrogen flow pump, and / or a corresponding one of the prior art known device, regulated.
  • the liquid steel is continuously, for example, via an inductive pump and a Siphon, discharged from the smelting reactor.
  • the slag is discharged in batches from the melt reactor.
  • the invention is further characterized by a device according to claim 9.
  • the device according to the invention is Carrier gas supply and / or the transport reduction reactor designed such that in the Reduction chamber in the area of the feed of the metal oxide a directed Carrier gas flow is adjustable, and is further the solids supply of the reduction chamber carried out such that the metal oxide is at least partially initiated by introducing In particular blowing, in the at least partially directed carrier gas stream of the Transport reduction reactor is finely distributed. In one embodiment, this takes place with, in particular by, the coincidence of the metal oxide with the im Transport reduction reactor prevailing carrier gas flow a fine distribution of Metal oxides in the carrier gas.
  • the transport reduction reactor has an opening through which the reducing gas together with the at least partially reduced, substantially solids-shaped, Metal oxide from the transport reduction reactor is derivable.
  • the solid feed is carried out in a manner which makes it possible to adjust the substantially solid-shaped metal oxide, preferably controllably, by a further carrier gas which is at least 50% by volume, preferably at least 90% by volume. from, optionally hot, H 2 consists, to introduce into the transport reduction reactor.
  • the device according to the invention is the reducing gas together with the at least partially reduced, im essential solid-shaped, metal oxide from the transport reduction reactor in a Gas-solid separation device, which has a lining, the compared to a hot reducing gas, the more than 50% by volume, in particular to more than 90% by volume, composed of hydrogen gas, is stable.
  • the gas-solid separation device is arranged and / or formed such that the fine-grained metal oxide at least partially by the, in the Transport reduction reactor prevailing, directed carrier gas flow, in particular Reduction gas stream can be introduced into the gas-solid separation device.
  • the device according to the invention closes the gas-solid separation device as a communicating vessel, in particular directly, to the transport reduction reactor.
  • the gas-solid separation device preferably without locks or similar devices, directly on the Transport reduction reactor, or at least partially in the transport reduction reactor arranged.
  • the device according to the invention is after the gas-solid separation device a melt reactor for Melting and optionally Fertigredupressive, of, at least partially pre-reduced, metal oxides, arranged.
  • the device according to the invention is for introducing the deposited in the gas-solid separation device Metal oxides in the melt reactor, a hydrogen flow pump, and / or a similar device, arranged.
  • the device according to the invention is the melt reactor, a plasma torch and / or an electrode for generating a arranged electric arc.
  • the transport reduction reactor directly, for example as with the Melting reactor communicating vessel, arranged after the melt reactor.
  • the Transport reduction reactor in a manner at the melt reactor, in particular immediately thereafter arranged, which makes it possible, at least partial thermal, flow of the gas occurring in the melt reactor at least partially as a directed flow, preferably as a carrier gas flow, in the Continue transport reduction reactor.
  • the transport reduction reactor is without Locks or similar devices are arranged directly on the melt reactor.
  • the device according to the invention is on Melting reactor and / or at the transport reduction reactor a Hydrogen flow pump and / or a corresponding device arranged, the it makes it possible to control the gas flow rate in the transport reduction reactor.
  • the process is divided into individual process steps disassembled. These run simultaneously in a single reaction vessel consisting of a meltdown part, a transport reduction reactor, and optionally integrated gas-solid separators, starting from.
  • the reaction vessel is like this procure that in individual parts of the same defined process steps run continuously.
  • Input materials to the plant for the production of steel are fine ore 1 and hydrogen.
  • Starting materials are liquid steel, liquid slag and a gas mixture of H 2 and H 2 O).
  • a number of heat exchangers 12, which are advantageous for Configuration of the heat balance of the described method are useful, and Compressor 13 attached.
  • a strip casting plant 14 is preferred continuous processing of the liquid steel, a surge tank for draining the steel and / or slag from the meltdown 4, as well as a Fine ore jar 2 outlined.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Manufacture Of Iron (AREA)
EP02013291A 2001-07-13 2002-06-18 Procédé et installation d'élaboration de métal en particulier de l'acier à partir d'oxydes métalliques à grains fins Withdrawn EP1275739A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0109401A AT410324B (de) 2001-07-13 2001-07-13 Verfahren und anlage zur metallerzeugung, vorzugsweise zur stahlerzeugung, aus feinkörnigem metalloxid
AT10942001 2001-07-13

Publications (2)

Publication Number Publication Date
EP1275739A2 true EP1275739A2 (fr) 2003-01-15
EP1275739A3 EP1275739A3 (fr) 2003-10-08

Family

ID=3685384

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02013291A Withdrawn EP1275739A3 (fr) 2001-07-13 2002-06-18 Procédé et installation d'élaboration de métal en particulier de l'acier à partir d'oxydes métalliques à grains fins

Country Status (2)

Country Link
EP (1) EP1275739A3 (fr)
AT (1) AT410324B (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2382084C2 (ru) * 2008-02-12 2010-02-20 Государственное образовательное учреждение высшего профессионального образования Московский государственный вечерний металлургический институт Способ непрерывной выплавки стали и устройство для его осуществления
AT17155U1 (de) * 2019-02-13 2021-07-15 Danieli & C Officine Mecchaniche S P A Direktreduktionssystem und zugehöriger Prozess
CN115522009A (zh) * 2022-09-28 2022-12-27 常州宝菱重工机械有限公司 纯氢等离子体熔融还原炼铁方法
WO2023214070A1 (fr) 2022-05-06 2023-11-09 Ferrum Decarb GmbH Four de réduction par fusion de plasma d'hydrogène, utilisation d'un four de réduction parfusion de plasma d'hydrogène pour réduire un oxyde métallique, procédé de réduction par fusion de plasma d'hydrogène d'oxyde métallique
DE102022111390A1 (de) 2022-05-06 2023-11-09 Ferrum Decarb GmbH Wasserstoffplasma-Schmelzreduktionsofen
US20230356299A1 (en) * 2022-05-09 2023-11-09 Regents Of The University Of Minnesota Solid compound rapid reduction systems and methods
DE102022113765A1 (de) 2022-05-31 2023-11-30 Ferrum Decarb GmbH Wasserstoffplasma-Schmelzreduktionsofen, Verwendung und Verfahren mit diesem
CN117625951A (zh) * 2022-08-12 2024-03-01 中冶长天国际工程有限责任公司 一种流态化制备铬系不锈钢的方法及装置
EP4350010A1 (fr) * 2022-10-05 2024-04-10 Primetals Technologies Austria GmbH Fonte de fer en frittage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115341064A (zh) * 2021-05-13 2022-11-15 中国科学院过程工程研究所 一种铁矿粉零碳流态化还原的方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2844056C3 (de) * 1978-10-10 1981-08-13 Mannesmann AG, 4000 Düsseldorf Verfahren und Vorrichtung zur Herstellung von Stahl aus Eisenerzstaub durch direkte Reduktion

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2382084C2 (ru) * 2008-02-12 2010-02-20 Государственное образовательное учреждение высшего профессионального образования Московский государственный вечерний металлургический институт Способ непрерывной выплавки стали и устройство для его осуществления
AT17155U1 (de) * 2019-02-13 2021-07-15 Danieli & C Officine Mecchaniche S P A Direktreduktionssystem und zugehöriger Prozess
WO2023214070A1 (fr) 2022-05-06 2023-11-09 Ferrum Decarb GmbH Four de réduction par fusion de plasma d'hydrogène, utilisation d'un four de réduction parfusion de plasma d'hydrogène pour réduire un oxyde métallique, procédé de réduction par fusion de plasma d'hydrogène d'oxyde métallique
DE102022111390A1 (de) 2022-05-06 2023-11-09 Ferrum Decarb GmbH Wasserstoffplasma-Schmelzreduktionsofen
US20230356299A1 (en) * 2022-05-09 2023-11-09 Regents Of The University Of Minnesota Solid compound rapid reduction systems and methods
DE102022113765A1 (de) 2022-05-31 2023-11-30 Ferrum Decarb GmbH Wasserstoffplasma-Schmelzreduktionsofen, Verwendung und Verfahren mit diesem
CN117625951A (zh) * 2022-08-12 2024-03-01 中冶长天国际工程有限责任公司 一种流态化制备铬系不锈钢的方法及装置
CN115522009A (zh) * 2022-09-28 2022-12-27 常州宝菱重工机械有限公司 纯氢等离子体熔融还原炼铁方法
CN115522009B (zh) * 2022-09-28 2024-01-30 常州宝菱重工机械有限公司 纯氢等离子体熔融还原炼铁方法
EP4350010A1 (fr) * 2022-10-05 2024-04-10 Primetals Technologies Austria GmbH Fonte de fer en frittage
WO2024074375A1 (fr) * 2022-10-05 2024-04-11 Primetals Technologies Austria GmbH Masse fondue de fer issue d'aggloméré

Also Published As

Publication number Publication date
ATA10942001A (de) 2002-08-15
AT410324B (de) 2003-03-25
EP1275739A3 (fr) 2003-10-08

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