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WO2006107256A1 - Procede de separation du fer metallique d'un oxyde - Google Patents

Procede de separation du fer metallique d'un oxyde Download PDF

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Publication number
WO2006107256A1
WO2006107256A1 PCT/SE2006/000395 SE2006000395W WO2006107256A1 WO 2006107256 A1 WO2006107256 A1 WO 2006107256A1 SE 2006000395 W SE2006000395 W SE 2006000395W WO 2006107256 A1 WO2006107256 A1 WO 2006107256A1
Authority
WO
WIPO (PCT)
Prior art keywords
fines
iron
metallic
burner
high density
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.)
Ceased
Application number
PCT/SE2006/000395
Other languages
English (en)
Inventor
Joachim Von Scheele
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.)
Linde GmbH
Original Assignee
Linde 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 Linde GmbH filed Critical Linde GmbH
Publication of WO2006107256A1 publication Critical patent/WO2006107256A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/56—Manufacture of steel by other methods
    • C21C5/567—Manufacture of steel by other methods operating in a continuous way
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • 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
    • C21B13/0026—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state introduction of iron oxide in the flame of a burner or a hot gas stream
    • 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
    • C21B3/00—General features in the manufacture of pig-iron
    • C21B3/04—Recovery of by-products, e.g. slag
    • C21B3/06—Treatment of liquid slag
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/04—Working-up slag
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/02—Physical or chemical treatment of slags
    • C21B2400/022—Methods of cooling or quenching molten slag
    • 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
    • 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
    • Y02P10/20—Recycling
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies

Definitions

  • the present invention relates generally to a method for separating metallic iron from oxide of fines containing both metallic iron reduced from iron oxide and remaining iron oxides, particularly pyrophoric fines, so called sponge iron fines resulting from the production of Direct Reduced Iron.
  • the dominating iron raw material for steel-making is the blast furnace hot metal turned into steel in basic oxygen converters .
  • the main alternative to hot metal is so called DRI (Direct Reduced Iron) produced by solid state reduction of iron ore.
  • DRI Direct Reduced Iron
  • the DRI is supplied to the steel making shop (internal or external) either as so called sponge iron, which is the form that the DRI obtains directly after reduc- tion, or as briquettes e.g. HBI (Hot Briquetted Iron).
  • the sponge iron has a porous structure resulting from the removal of oxygen from the ore feed.
  • the sponge iron is a low-density product with a large internal metallic surface which makes it prone to self-ignition that can start by small amounts of moisture.
  • Oxidation of metallic iron by moisture creates hydrogen which makes storing and transportation of sponge iron very hazardous, in particular sea-borne shipping, due to the risk of explosions and exothermal reactions. Therefore special measures are to be taken for the transportation of sponge iron to external users .
  • An alternative is the HBI which means that the DRI is hot discharged from the reduction furnace and compressed at discharge temperature to a high density non-pyrophoric product .
  • a by-product is sponge iron in the form of fines.
  • various amounts of sponge iron fines are obtained as a by-product.
  • These sponge iron fines having a metallic iron content that varies between 5-90%, constitute a problem.
  • the fines are divided into several quality classes and fines having a relatively high metal content can be sold on the open market to be used as a raw material in steel- making however, at a reduced price due to its size and with the same transportation and storing problem as for ordinary size sponge iron.
  • Fines having a low metallic iron content are often stored unprocessed in large heaps . This of course constitutes an environ- mental hazard and the pressure from public authorities is increasing. This waste of metal containing material is also uneconomical.
  • sponge iron fines generally has the following properties :
  • the fines are either sold at a low price for other uses than as a steel furnace charge, e.g. as an iron-bearing additive in the production of blast furnace sinter, or, as already mentioned, just being stored in heaps due to their low value .
  • the object of the present invention is to provide a method for converting low density, sponge iron fines into high density, non-pyrophoric agglomerates with high contents of metallic iron and of suitable size for use as a charge material in steel making by separating, in liquid state, metallic iron from oxide of fines containing both metallic iron and iron oxide, and subsequently quenching the liquid metallic iron to form high density agglomerates.
  • the method thus present a solution to the problems connected with sponge iron fines as described above.
  • the invention is based on the realisation that the fines containing both metallic iron and iron oxide can be fed directly to and melted in the flame of a burner whereby separation is effected.
  • the metallic part of fines containing both metallic iron and iron oxide can be separated from the rest and be recovered in suitable form for use as a raw material in steel-making, in foundries etc
  • FIG. 1 is a schematic diagram of a plant used with the method according to the invention.
  • FIG. 2 is a sectional view of a burner used with the method according to the invention.
  • FIG. 3 is a schematic front view of the burner shown in FIG. 2.
  • fines is used for the material supplied to the plant.
  • fines is meant products with a diameter less than approximately 10 millimeters, predominantly less than 6 mm. These fines are by-products from DRI processes, related briquetting processes, etc.
  • the metal content of the fines is at least 5%, more preferably at least 20%, and most preferably at least 50% by weight.
  • low-density sponge iron should be interpreted as a product having a porous structure with a large internal metallic surface resulting from the removal of oxygen from the ore feed.
  • high-density agglomerates of iron are a product wherein the density of individual agglomerates is higher than approximately 7.
  • FIG. 1 an overall diagram of a plant for separating metallic iron from oxide of fines containing both metallic iron and iron oxide, generally designated 10, is shown.
  • the plant is built around a burner 20 installed in a sidewall of a furnace 30.
  • the burner is a so-called oxy-fuel burner and is thus supplied with fuel through a first feeding line 21 and with oxygen through a second feeding line 22.
  • oxygen is in this context meant a gas with an O 2 content exceeding 21% and preferably so-called technical oxygen having an O 2 content of approx. 90-100%.
  • Fines are supplied to the burner through a third feeding line 23.
  • the third feeding line 23 is connected to some kind of supply, generally designated 40.
  • the furnace vessel 30 is a separate unit having a closable outlet 32 near the lower portion thereof for the emptying of the molten iron recovered by the method or alter- natively, a tap hole 38, preferably of siphon type, for continuous tapping of liquid iron.
  • the vessel has a separate tap hole 39 for continuous or batch wise tapping of the liquid slag.
  • the exemplary plant also comprises a water tank for quenching the liquid iron into high density agglomerates and an arrangement for unloading the product 60 from the quenching tank.
  • a device 51 is provided for disintegrating the liquid metallic tapping stream into droplets of corresponding size, this device may be designed according to known published methods .
  • FIG. 2 is a sectional view of the front portion of the burner and Fig. 3 is a front view.
  • This burner is adapted to be used with fuel in the form of a gas, such as propane, natural gas, or butane, or with oil fuel.
  • the burner 20 comprises a main portion 24, to which the supply lines 21-23 shown in Fig. 1 are connected.
  • the portion 24 is provided with an essentially circular cross-section, see Fig. 3, in which the configuration of the supply lines 21-23 appears in more detail.
  • Fuel is supplied through the first supply line 21 in the form of six equidistant pipes 21a-f placed at a constant distance from the center axis of the main portion 24.
  • Oxygen is supplied through an annular outer portion 22 and thus surrounds the fuel supplied through the pipes 21a-f .
  • fines are supplied through the pipe 23, which is co-axially placed in the burner.
  • the burner 20 is mounted in the sidewall of the furnace 30.
  • the burner can be tilted, i.e., can be posi- tioned in different angles relative to the horizontal and the vertical.
  • the different orientations can be used for obtaining desired characteristics for the burning process.
  • the fines are transferred from the supply 40 to the burner 20 by means of any suitable means, such as an inert or reducing carrying gas .
  • Any suitable means such as an inert or reducing carrying gas .
  • the rate by which the fines are fed to the burner is determined by the specific application.
  • the operation of the oxy-fuel burner 20 is controlled by means of the amount of fuel and oxygen supplied through the first and second supply lines 21 and 22, respectively.
  • the supply lines are connected to sources of fuel and oxygen (not shown) , as is conventional .
  • Fuel such as oil or gas
  • the oxy-fuel mixture results in the flame 25 having properties, such as length, temperature etc., that are controlled by the supply rate of fuel and oxygen.
  • the fines are injected into the central portion of the flame.
  • the fines are injected into the flame 25 where they are brought to totally melt, thereby allowing separation of the metal containing fines into a metallic part and an oxidic part.
  • the separation of metal and oxide into two bulk phases as described below is driven by the systems tendency to lower its total surface energy and by the difference in the density of the two phases.
  • the melting process is controlled by means of several parameters, of which can be mentioned: temperature and velocity of the flame 25, stoichiometry, i.e., the ratio oxidizing gas to added fuel, the oxygen content of the oxidizing gas, the supply rate of oxygen and added fuel, the rate of injection of fines and its characteristics, the travel time of the fines in the flame, and burner characteristics and configuration, such as tilting.
  • stoichiometry i.e., the ratio oxidizing gas to added fuel, the oxygen content of the oxidizing gas, the supply rate of oxygen and added fuel, the rate of injection of fines and its characteristics, the travel time of the fines in the flame, and burner characteristics and configuration, such as tilting.
  • a feature of the burner operation is that the power intensity of the burner flame, defined as the power of the burner divided by the area of the least circle that encloses the flame root, is at least 10 kW/cm z , and preferably the said power intensity is at least 20 kW/cm 2 .
  • the melted droplets fall to the bottom of the furnace 30, wherein they are added to the molten charge.
  • the charge is divided into an upper layer 34 and a lower layer 36.
  • the oxidic part of the material fed to the furnace is accumulated as a liquid slag while the liquid metallic part is accumulated in the lower layer 36.
  • both the metallic part and the oxidic part can be removed in separate tap streams from the furnace 30 for separate subsequent treatments.
  • This subsequent treatment preferably involves granulation of the metallic part by means of quenching iron droplets in a water bath resulting in high density pieces wherein at least 90 % of the produced high density pieces have a preferred size of 10-40 mm.
  • the quenching is preferably done by using the exemplary equipment shown in Fig. 1, but for the person skilled in the art, it is obvious that a similar granulation result can be achieved also with other means such as dry granulating.
  • the method enables the slag, leaving the process in liquid form, to be adapted to its subsequent use, which may be use as iron-bearing raw material to be up-graded or directly used as sinter feed, use as slag former, use as road filling material etc., the adap- tation including measures such as granulating, slow cooling, or mixing the slag with e.g. lime/limestone to make a slag forming product etc.
  • the method according to the invention does not involve any active measures in order to produce a chemical conversion.
  • the method basically separates metallic iron from oxide in fines containing both metallic iron and iron oxide.
  • a carbon- bearing material together with the fines and/or to run the melting process sub-stochiometrically, resulting in a reduction of the iron oxide content of the fines .
  • the carbon-bearing material can also be added either to a "hot heel" of liquid iron which remains in the furnace after emptying the metallic part of the charge or be injected/charged in suitable form separately into the process vessel. This reduction process increases the iron yield of the total process.
  • the addition of carbon-bearing material may be used also to increase the carbon content of the metallic product which adds to its value .
  • the fines may have a certain carbon content, sometimes up to approximately 4%. This carbon is normally found in the form of iron carbide (Fe 3 C). Naturally the needed input of carbon-bearing material when applying the method is adapted to the level of carbon contained in the fines .
  • a preferred embodiment of the method according to the invention has been described. The person skilled in the art realizes that this can be varied within the scope of the appended claims.
  • the fines have been described as being essentially dry, in an alternative embodiment the fines form part of a slurry that may consist of sponge iron fines mixed with an organic liquid.
  • a separate furnace unit 30 has been shown. The method according to the invention is equally applicable to other kinds of furnaces, such as electric arc furnaces, induction furnaces, reverberatory furnaces, electrically heated furnaces, blast furnaces, cupola furnaces, rotary furnaces, and converters etc.
  • the burner is positioned in a sidewall of a furnace.
  • suitable positions such as in the upper part of the furnace.
  • a configuration with more than one burner is possible. It is then possible to inject the fines between three burner flames, for example.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Manufacture Of Iron (AREA)

Abstract

L'invention porte sur un procédé de transformation de fines d'éponge de fer de basse densité en agglomérats de haute densité ayant une teneur accrue en fer métallique et appropriés comme matériau de charge dans la fabrication de l'acier. Le procédé consiste à: amener les fines vers la flamme d'un brûleur d'oxygène et gaz ayant une intensité assurant la fonte totale des fines, ce qui permet de séparer les fines contenant le métal en une partie métallique et en une partie oxyde; séparer les deux phases en laitier liquide et en un bain de fer liquide dans un four ou cuve approprié et transformer le fer liquide en agglomérats de haut densité. Par ce procédé, la partie métallique des fines contenant le métal et l'oxyde métallique peut être séparée du reste et être récupérée sous une forme appropriée destinée à être utilisée comme matériau brut dans la fabrication de l'acier, dans les fonderies, etc.
PCT/SE2006/000395 2005-04-08 2006-04-03 Procede de separation du fer metallique d'un oxyde Ceased WO2006107256A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0500782-8 2005-04-08
SE0500782 2005-04-08

Publications (1)

Publication Number Publication Date
WO2006107256A1 true WO2006107256A1 (fr) 2006-10-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2006/000395 Ceased WO2006107256A1 (fr) 2005-04-08 2006-04-03 Procede de separation du fer metallique d'un oxyde

Country Status (3)

Country Link
RU (1) RU2403289C2 (fr)
WO (1) WO2006107256A1 (fr)
ZA (1) ZA200708105B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150135899A1 (en) * 2012-05-16 2015-05-21 Siemens Vai Metals Technologies Gmbh Method and device for introducing fine particle-shaped material into the fluidised bed of a fluidised bed reduction unit
EP3220084A1 (fr) 2016-03-16 2017-09-20 Linde Aktiengesellschaft Traitement de déchets particulaires
EP3220083A1 (fr) 2016-03-16 2017-09-20 Linde Aktiengesellschaft Traitement de déchets particulaires

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2010114611A (ru) 2007-09-14 2011-10-20 Баррик Гольд Корпорейшн (CA) Способ восстановления металлов платиновой группы с использованием восстановителей
CN112063836A (zh) * 2020-10-27 2020-12-11 芜湖海创实业有限责任公司 一种电镀污泥处理系统及方法

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1154817B (de) * 1957-04-27 1963-09-26 Ontario Research Foundation Verfahren zum Reduzieren von Eisenerz unter Einfuehrung von feinzerkleinertem Eisenerz, Flussmittel, Brennstoff, Sauerstoff und/oder Luft durch Brenner in eine Reaktionskammer
US3888956A (en) * 1968-02-05 1975-06-10 Uddeholms Ab Method of making granulate
US5258053A (en) * 1991-07-08 1993-11-02 Elkem A/S Method for production of granules
EP0618419A1 (fr) * 1993-04-02 1994-10-05 AIR PRODUCTS GmbH Procédé et dispositif pour éliminer les poussières d'un cubilot par incinération/formation de laitier
US5948139A (en) * 1995-07-19 1999-09-07 Voest-Alpine Industrieanlagenbau Gmbh Process for the production of molten pig iron or steel pre-products and a plant for carrying out the process
US6156262A (en) * 1996-06-20 2000-12-05 Voest-Alpine Industrieanlagenbau Gmbh Melter gasifier for the production of a metal melt
WO2001086011A1 (fr) * 2000-05-05 2001-11-15 Aga Aktiebolag Procede et dispositif destines a la recuperation de metaux
WO2002066895A1 (fr) * 2001-02-22 2002-08-29 Aga Aktiebolag Procede et traitement de boues contenant des particules melangees renfermant du metal, un oxyde metallique ou un hydroxyde metallique
US6488738B2 (en) * 1996-12-17 2002-12-03 Voest-Alpine Industrieanlagenbau Gmbh Method of producing molten metal

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1154817B (de) * 1957-04-27 1963-09-26 Ontario Research Foundation Verfahren zum Reduzieren von Eisenerz unter Einfuehrung von feinzerkleinertem Eisenerz, Flussmittel, Brennstoff, Sauerstoff und/oder Luft durch Brenner in eine Reaktionskammer
US3888956A (en) * 1968-02-05 1975-06-10 Uddeholms Ab Method of making granulate
US5258053A (en) * 1991-07-08 1993-11-02 Elkem A/S Method for production of granules
EP0618419A1 (fr) * 1993-04-02 1994-10-05 AIR PRODUCTS GmbH Procédé et dispositif pour éliminer les poussières d'un cubilot par incinération/formation de laitier
US5948139A (en) * 1995-07-19 1999-09-07 Voest-Alpine Industrieanlagenbau Gmbh Process for the production of molten pig iron or steel pre-products and a plant for carrying out the process
US6156262A (en) * 1996-06-20 2000-12-05 Voest-Alpine Industrieanlagenbau Gmbh Melter gasifier for the production of a metal melt
US6488738B2 (en) * 1996-12-17 2002-12-03 Voest-Alpine Industrieanlagenbau Gmbh Method of producing molten metal
WO2001086011A1 (fr) * 2000-05-05 2001-11-15 Aga Aktiebolag Procede et dispositif destines a la recuperation de metaux
WO2002066895A1 (fr) * 2001-02-22 2002-08-29 Aga Aktiebolag Procede et traitement de boues contenant des particules melangees renfermant du metal, un oxyde metallique ou un hydroxyde metallique

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150135899A1 (en) * 2012-05-16 2015-05-21 Siemens Vai Metals Technologies Gmbh Method and device for introducing fine particle-shaped material into the fluidised bed of a fluidised bed reduction unit
US9512496B2 (en) * 2012-05-16 2016-12-06 Primetals Technologies Austria GmbH Method and device for introducing fine particle-shaped material into the fluidised bed of a fluidised bed reduction unit
EP3220084A1 (fr) 2016-03-16 2017-09-20 Linde Aktiengesellschaft Traitement de déchets particulaires
EP3220085A1 (fr) 2016-03-16 2017-09-20 Linde Aktiengesellschaft Traitement de déchets particulaires
EP3220083A1 (fr) 2016-03-16 2017-09-20 Linde Aktiengesellschaft Traitement de déchets particulaires

Also Published As

Publication number Publication date
ZA200708105B (en) 2008-09-25
RU2007135253A (ru) 2009-05-20
RU2403289C2 (ru) 2010-11-10

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