[go: up one dir, main page]

WO2025003290A1 - Procédé de traitement d'un mélange de résidus contenant les éléments fer et/ou calcium et installation de traitement correspondante - Google Patents

Procédé de traitement d'un mélange de résidus contenant les éléments fer et/ou calcium et installation de traitement correspondante Download PDF

Info

Publication number
WO2025003290A1
WO2025003290A1 PCT/EP2024/068049 EP2024068049W WO2025003290A1 WO 2025003290 A1 WO2025003290 A1 WO 2025003290A1 EP 2024068049 W EP2024068049 W EP 2024068049W WO 2025003290 A1 WO2025003290 A1 WO 2025003290A1
Authority
WO
WIPO (PCT)
Prior art keywords
residue mixture
drum
rotary kiln
processing
furnace
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.)
Pending
Application number
PCT/EP2024/068049
Other languages
German (de)
English (en)
Inventor
Peter PALZER
Stephan Hand KÖHNE
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.)
Ts Elino GmbH
Salzgitter Flachstahl GmbH
Original Assignee
Ts Elino GmbH
Salzgitter Flachstahl 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 Ts Elino GmbH, Salzgitter Flachstahl GmbH filed Critical Ts Elino GmbH
Publication of WO2025003290A1 publication Critical patent/WO2025003290A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

Links

Classifications

    • 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
    • C22B7/02—Working-up flue dust
    • 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
    • C22B13/00—Obtaining lead
    • C22B13/02—Obtaining lead by dry processes
    • C22B13/025—Recovery from waste materials
    • 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
    • C22B19/00—Obtaining zinc or zinc oxide
    • C22B19/30—Obtaining zinc or zinc oxide from metallic residues or scraps
    • 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
    • C22B7/001—Dry processes
    • 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
    • C22B7/001—Dry processes
    • C22B7/004—Dry processes separating two or more metals by melting out (liquation), i.e. heating above the temperature of the lower melting metal component(s); by fractional crystallisation (controlled freezing)
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2200/00—Recycling of non-gaseous waste material
    • 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
    • C21C2200/00—Recycling of waste 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
    • Y02P10/20—Recycling

Definitions

  • the invention is based on a method for processing a residue mixture containing the elements iron and/or calcium for industrial use by at least partially separating at least one volatile element, in particular the following list of elements: Zn, Pb, Na, K, CI, S, F and P, from this residue mixture in a furnace, wherein this residue mixture is designed as a granular residue mixture or at least has a granular portion.
  • the invention is further based on a corresponding computer program product for carrying out the method and a corresponding processing plant for processing a residue mixture containing the elements iron and/or calcium for industrial use, comprising a furnace for at least partially separating at least one volatile element, in particular the following list of elements: Zn, Pb, Na, K, CI, S, F and P, from this residue mixture, wherein this residue mixture is designed as a granular residue mixture or at least has a granular portion.
  • blast furnace dust and converter dust are at least partially recycled by adding them to the initial sinter mixture, and mill scale, which has a high iron content, serves mainly as an iron carrier in sinter production.
  • blast furnace dust and converter dust are recycled in the steelworks in this way, unwanted metals such as zinc, lead and alkali metals accumulate, which limits the internal circulation of these materials.
  • blast furnace dust and converter dust are recycled by adding them to sinter, these unwanted metals accumulate in the blast furnace through the sinter, which leads, for example, to the formation of deposits on and in the furnace wall of the blast furnace, thereby reducing its performance and the duration of the furnace cycle.
  • granular mixture in connection with the present Invention is understood to mean a mixture of a large number of solid particles which in turn are heterogeneously permeated by an environmental medium, such as air or water, so that bulk material properties arise.
  • the document EP 2 458 021 A1 describes a processing plant for processing a residue mixture containing the element iron for use in the metallurgical industry, with a rotary hearth furnace for at least partially separating the volatile metal elements zinc (Zn), lead (Pb), sodium (Na) and/or potassium (K) and for reducing the element iron from the residue mixture, whereby this residue mixture for processing in the furnace is present as a granular residue mixture of carbon composite agglomerates that were previously created from ironworks dust and other components, at least one of which provides the carbon.
  • the said document also describes a corresponding method for processing a residue mixture containing the element iron for use in the metallurgical industry. However, the additional step of agglomerating the ironworks dust with other components to form the carbon composite agglomerates alone results in increased expenditure.
  • the furnace is designed as a drum or rotary kiln and a process gas with a hydrogen portion is fed to the furnace for processing the residue mixture of more than 5% by volume, in particular more than 50% by volume.
  • a drum or rotary kiln with a hydrogen-containing atmosphere is used to process the residue mixture.
  • a drum furnace or rotary kiln is a cylindrical furnace for process processes that usually rotates continuously around its own axis during operation.
  • the rotary kiln often has a slight inclination of the axis of rotation, which together with the rotational movement ensures product or fuel transport.
  • the particle size of the individual particles of the granulate can be significantly smaller than with a rotary hearth furnace, so that a preparatory step of agglomerating waste particles in the form of dust particles or similar can be omitted. Handling such a drum furnace or rotary kiln is also much easier than that of a rotary hearth furnace.
  • the hydrogen content in the atmosphere - especially in combination with a small particle size of the granulate particles - also enables a chemical reduction of chemical components of the granulate material, for example the element iron (Fe) in a waste mixture containing this element.
  • the volatile elements are in particular the elements from the following list: Zn, Pb, Na, K, CI, S, F and P.
  • the granular residue mixture or the granular portion of the residue mixture consists of particles whose particle size is 85% by weight smaller than 10 millimeters (10 mm).
  • more than 50% by weight, in particular more than 80% by weight, of the granular residue mixture or the granular portion of the residue mixture is in the form of dust and/or - preferably dried - sludge when it is filled into the drum or rotary kiln.
  • the particle size of the particles of the dust and/or - preferably dried - sludge is in the micrometer range, i.e. less than 1.0 mm, preferably less than 400 pm.
  • the residue mixture contains not only the elements iron and/or calcium but also the element carbon (C), preferably of biogenic origin. Carbon of biogenic origin comes from a renewable raw material and not from a fossil raw material, and therefore has no fossil origin.
  • the atmosphere in the furnace is enriched with carbon monoxide (CO) during the processing of the residue mixture and preferably has a carbon monoxide content of more than 5% by volume.
  • the carbon monoxide is formed by the reduction of water vapor produced in the process to carbon and thus reduces the hydrogen required for the process.
  • the drum or rotary kiln is operated at a kiln temperature of 830 °C to 1030 °C, preferably 880 °C to 990 °C, during the processing of the residue mixture.
  • This temperature range of the kiln temperature has proven to be advantageous both for the separation process and for an optional reduction process.
  • the residue mixture is exposed to the furnace temperature in the drum or rotary kiln for a period of 15 minutes to 150 minutes during its processing in the furnace.
  • Such a period of time, in combination with the furnace temperature mentioned, has proven to be advantageous both for the separation process and for an optional reduction process.
  • this at least one volatile element is discharged via the atmosphere/a gas phase in the drum or rotary kiln and separated in a filter device.
  • the invention further relates to a computer program product which comprises instructions which, when executed by a processor of a control and/or regulating device, cause this processor to carry out an above-mentioned method.
  • the processing plant according to the invention for processing a the elements Iron and/or calcium-containing residue mixture for industrial use which has a furnace for at least partially separating at least one volatile element from this residue mixture, wherein this residue mixture is designed as a granular residue mixture or at least has a granular portion
  • the furnace is designed as a drum or rotary kiln and the processing plant comprises a device for supplying a process gas to the drum or rotary kiln, which has a hydrogen portion of more than 5% by volume, in particular of more than 50% by volume.
  • the volatile elements are in particular the elements from the following list: Zn, Pb, Na, K, CI, S, F and P.
  • the device for supplying the process gas comprises a dosing system for providing a selectable hydrogen content in the process gas.
  • the processing plant has gas-tight components for using the process gas with a hydrogen content, at least one of which is a component of the device for feeding the process gas into the drum or rotary kiln.
  • the gas-tightness referred to here also relates in particular to the hydrogen content, i.e. the H2 in the process gas.
  • the furnace preferably has a heating device for direct or indirect heating, via which a furnace temperature inside the furnace of up to 1030 °C can be achieved.
  • a heating device for direct or indirect heating, via which a furnace temperature inside the furnace of up to 1030 °C can be achieved.
  • the furnace is operated during the processing process at a furnace temperature of 830 °C to 1030 °C, preferably from 880 °C to 990 °C.
  • the treatment plant shall have a control and/or
  • Control device for controlling or regulating the operation of the processing plant This preferably has a processor, i.e. is computer-based.
  • the processing plant has a gas outlet with a filter device for separating the at least one volatile element discharged via the atmosphere/a gas phase in the drum or rotary kiln.
  • Fig. 1 shows a processing plant for processing an iron- and/or calcium-containing residue mixture for industrial use according to a preferred embodiment of the invention.
  • Fig. 1 shows a processing plant 10 for processing a residual material mixture 12 containing iron and/or calcium for industrial use.
  • the central unit of this processing plant 10 is a furnace 14 in the form of a drum or rotary kiln 16 for at least partially separating at least one volatile element from the following selection of elements: Zn, Pb, Na, K, CI, S, F and P from the said residual material mixture 12.
  • the residual material mixture 12 which contains the elements iron and/or calcium, is referred to simply as residual material mixture 12.
  • the drum or rotary kiln 16 shown here is designed as a typical rotary kiln (DRO), i.e. as a kiln 14 with a rotary tube 20 that is rotatably mounted about its longitudinal axis 18, which is shown in section in the figure so that the interior of the rotary tube 20 with the residual material mixture 12 located therein is visible.
  • This interior of the rotary tube 20 essentially forms the interior 22 of the drum or rotary kiln 16.
  • the rotary tube 20 is rotatably mounted via bearings 24, whereby the kiln 16 also has a drive 26 for rotating the rotary tube 20 about the longitudinal axis 18.
  • the rotary tube 20 can be heated directly or indirectly via a heating device (not shown) and serves to receive and circulate the residual material mixture 12 in its interior 22.
  • a slight inclination (of a few degrees) of the longitudinal axis 18 relative to the horizontal determines the direction in which the residual material mixture 12 flows through the drum or rotary kiln 16 from an inlet 28 to an outlet 30 of the kiln 16 (arrow 32).
  • the processed residual material mixture 12 leaves the drum or rotary kiln 16 and is transferred to a - preferably closed - container 34.
  • the processing plant 10 also has a feed device 36 for feeding residual material mixture 12 into the kiln 16, a device 38 for feeding a process gas into the interior 22 of the kiln 16 and a control and/or regulating device 40 for controlling or regulating the operation of the processing plant 10.
  • the feed device 36 for feeding residual material mixture 12 into the drum or rotary kiln 16 in turn comprises a storage container 42 for holding residual material mixture 12 and a conveyor device 44 with a conveyor screw (not shown), via which the residual material mixture 12 can be transported or is transported from the storage container 40 to the inlet 28 of the drum or rotary kiln 16.
  • the device 38 for supplying a process gas comprises several gas storage units 46, 48 and a metering system 50 for metered supply of the gases from these gas storage units 46, 48 to the outlet 30 of the drum or rotary kiln 16.
  • the gas storage units 46, 48 are representative examples of various gas sources.
  • One of the gases is hydrogen (H2), another is, for example, methane (CH4) or ammonia (NH3).
  • the hydrogen content of the process gas or the atmosphere in the interior 22 of the drum or rotary kiln 16 can be adjusted via the metering system 50 of the device 38.
  • the control and/or regulating device 40 for controlling or regulating the operation of the processing plant 10 controls components 26, 44, 50 of the drum or rotary kiln 16, the feed device 36 and/or the device 38 for supplying the process gas.
  • the drum or rotary kiln 16 is used in countercurrent operation, in which the residue mixture 12 and the gas inside 22 of the kiln 16 move in opposite directions through the kiln 16.
  • a gas outlet 52 with a filter device 54 in which the said volatile elements accumulate.
  • a direct current operation with a corresponding structure can also be used. be provided.
  • the processing plant 10 and in particular its drum or rotary kiln 16 is now operated in such a way that at least one volatile chemical element, in particular at least one chemical element from the following list of elements: Zn, Pb, Na, K, CI, S, F and P, is at least partially separated from the residual material mixture 12.
  • the drum or rotary kiln 16 is operated at a furnace temperature of 830 °C to 1030 °C, preferably 880 °C to 990 °C, during the processing of the residual material mixture 12 and it is ensured that the residence time of the residual material mixture 12 in the interior 22 of the drum or rotary kiln 16 at this furnace temperature is 15 minutes to 150 minutes.
  • These parameters have proven to be particularly favorable for the separation of the said elements.
  • An optional chemical reduction via the hydrogen in the atmosphere can also be easily implemented with these parameters.
  • the process gas supplied by device 38 has a hydrogen content of at least 5% by volume.
  • HBI hot briquetted iron
  • cold briquetted iron from waste materials
  • the filter residues can optionally be further processed, in particular by washing or thermal treatment under oxidizing conditions, for example in the drum and/or rotary kiln 16, in order to separate the alkalis and the chlorine from the Zn and Pb oxides.
  • the Zn and Pb oxides can optionally be further processed in a subsequent process under reducing conditions to metallic Zn and Pb (previously mentioned recovery of Zn and Pb).
  • the reduced reaction product is collected in a closed container/collecting vessel 34 and protected from undesirable reoxidation.
  • the material is then compacted, preferably hot or cold briquetted. This enables the product to be transported and stored as an HBI-like feedstock.
  • the atmosphere inside 22 of the drum and/or rotary kiln 16 may contain, in addition to H2, the following components: CO, CO2, H2O, CH4
  • composition of the gas introduced into the drum furnace/rotary kiln comprises reactive components, preferably either
  • H2O a mixture of H2 and H2O, where the hydrogen content is > 70 vol. %, advantageously > 80 vol. %, especially advantageously > 90 vol. %, accordingly H2O less than 30 vol. %, advantageously ⁇ 20 vol. %, especially advantageously ⁇ 10 vol. %, or
  • the CO content is advantageously limited to ⁇ 30 vol.%
  • the temperature in the furnace 16 is 830°C to 1030 °C, preferably 880°C to 990 °C; the throughput time of the feedstocks in the reduction area is 15 to 150 minutes.
  • waste materials can be used as input materials:
  • the residues have increased contents of Zn of > 2.5 wt.%, of alkalis (K2O and Na2 ⁇ ) of > 0.5 wt.% and of CI of > 0.15 wt.%.
  • the residues contain oil residues
  • the rest may be oversize grain
  • Fe content of the final product must not be less than 50 wt.%. reference sign

Landscapes

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

Abstract

L'invention concerne un procédé de traitement d'un mélange de résidus (12) contenant les éléments fer et/ou calcium à des fins industrielles par séparation au moins partielle d'au moins un élément volatil, en particulier un élément volatil de la liste d'éléments suivante : Zn, Pb, Na, K, Cl, S, F et P, d'avec ce mélange de résidus (12) dans un four (14), ce mélange de résidus (12) se présentant sous la forme d'un mélange granulaire de résidus ou comprenant au moins une fraction granulaire. Selon l'invention, le four (14) est conçu sous la forme d'un four rotatif ou d'un fourneau rotatif (16) et un gaz de traitement comportant une fraction hydrogène supérieure à 5 % en volume, en particulier supérieure à 50 % en volume, est introduit dans le four rotatif ou le fourneau rotatif (16) pour le traitement du mélange de résidus (12). L'invention concerne en outre un produit-programme d'ordinateur correspondant, qui amène un processeur à mettre en œuvre le procédé, et une installation de traitement correspondante (10) pour le traitement d'un mélange de résidus (12) contenant les éléments fer et/ou calcium à des fins industrielles.
PCT/EP2024/068049 2023-06-28 2024-06-27 Procédé de traitement d'un mélange de résidus contenant les éléments fer et/ou calcium et installation de traitement correspondante Pending WO2025003290A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102023117072.4A DE102023117072A1 (de) 2023-06-28 2023-06-28 Verfahren zur Aufbereitung eines die Elemente Eisen und/oder Calcium aufweisenden Reststoffgemenges und entsprechende Aufbereitungsanlage
DE102023117072.4 2023-06-28

Publications (1)

Publication Number Publication Date
WO2025003290A1 true WO2025003290A1 (fr) 2025-01-02

Family

ID=91829517

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2024/068049 Pending WO2025003290A1 (fr) 2023-06-28 2024-06-27 Procédé de traitement d'un mélange de résidus contenant les éléments fer et/ou calcium et installation de traitement correspondante

Country Status (2)

Country Link
DE (1) DE102023117072A1 (fr)
WO (1) WO2025003290A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0972849A1 (fr) * 1996-02-29 2000-01-19 Nippon Steel Corporation Procede et appareil de traitement de poussiere de production de fer
EP2458021A1 (fr) 2009-07-21 2012-05-30 Kabushiki Kaisha Kobe Seiko Sho Appareil et procédé pour la production de fer réduit mettant en uvre une poussière de production de fer alcalin en tant que matière première
CN105483371A (zh) * 2015-12-21 2016-04-13 武钢集团昆明钢铁股份有限公司 一种综合回收利用高炉含铅锌粉尘的方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH256598A (de) * 1947-08-05 1948-08-31 Lonza Ag Reduktionstrommelofen mit elektrischer Heizung.
US3753682A (en) * 1970-09-18 1973-08-21 Allis Chalmers Mfg Co Ported rotary kiln process for direct reduction of oxides of metallic minerals

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0972849A1 (fr) * 1996-02-29 2000-01-19 Nippon Steel Corporation Procede et appareil de traitement de poussiere de production de fer
EP2458021A1 (fr) 2009-07-21 2012-05-30 Kabushiki Kaisha Kobe Seiko Sho Appareil et procédé pour la production de fer réduit mettant en uvre une poussière de production de fer alcalin en tant que matière première
CN105483371A (zh) * 2015-12-21 2016-04-13 武钢集团昆明钢铁股份有限公司 一种综合回收利用高炉含铅锌粉尘的方法

Also Published As

Publication number Publication date
DE102023117072A1 (de) 2025-01-02

Similar Documents

Publication Publication Date Title
AT509593B1 (de) Verfahren zum aufarbeiten von organischen abfallstoffen
DE69027437T2 (de) Verhüttung metallurgischer abfallstoffe enthaltend eisenbestandteile und toxische elemente
EP0632843B1 (fr) Procede d'elimination du plomb et du zinc contenus dans des poussieres d'usines metallurgiques
LU86070A1 (de) Verfahren zum aufarbeiten zink-und bleihaltiger reststoffe der stahlindustrie im hinblick auf eine metallurgische weiterverarbeitung
WO2023030956A1 (fr) Procédé de production d'un bain de fer
AT405054B (de) Verfahren und anlage zum herstellen einer eisenschmelze unter einsatz von eisenhältigen hüttenwerksreststoffen
EP4281524B1 (fr) Dispositif d'utilisation de gaz de traitement lors de la conversion de déchets et formation de gaz de synthèse
DE3536635C2 (fr)
AT406272B (de) Verfahren zur herstellung von direkt reduziertem eisen, flüssigem roheisen und stahl sowie anlage zur durchführung des verfahrens
DE3307175C2 (fr)
WO2023030944A1 (fr) Procédé de production d'une fonte de fer
DE4123626A1 (de) Verfahren zur metallurgischen aufarbeitung von huettenreststoffen
EP0012363B1 (fr) Procédé et dispositif pour la réduction de minerais
WO2025003290A1 (fr) Procédé de traitement d'un mélange de résidus contenant les éléments fer et/ou calcium et installation de traitement correspondante
EP3670468B1 (fr) Procédé d'obtention d'une matières première secondaire pour la production de ciment et cimenterie
DE69801157T2 (de) Verfahren zum wiederverwerten von abfallstoffen der messinggiessereien
EP1386013B1 (fr) Procede de valorisation des boues de battitures de laminage et des fines de charbon
EP0766750A1 (fr) Procede et installation de recyclage de residus ferreux de l'industrie metallurgique
EP0910678A1 (fr) Procede de valorisation de poussieres produites lors de processus metallurgiques, telles que des poussieres de convertisseur d'acierie contenant du zinc
DD252617A5 (de) Verfahren zur nutzung des eisengehaltes von eisenerzen, eisenoxydhaltigen stoffen sowie nebenprodukten und abfaellen der eisen- und stahlindustrie
AT525219B1 (de) Verfahren und Vorrichtung zur Aufbereitung von zinkhaltigen Filterstäuben der Stahl- und Gießereiindustrie
DE19932334C1 (de) Oxicupola Prozeß
DE19637848C2 (de) Verfahren zur Verwertung von aluminium- und/oder eisenhaltigen Abfällen
EP4650461A1 (fr) Procédé de traitement de scories
AT407162B (de) Verfahren zur herstellung von flüssigem roheisen

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 24739113

Country of ref document: EP

Kind code of ref document: A1