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WO2009129823A1 - Production de produits frittés à base de ferrite de calcium, à partir de résidus ferreux contenant du zinc et du plomb, pour valoriser lesdits résidus ferreux - Google Patents

Production de produits frittés à base de ferrite de calcium, à partir de résidus ferreux contenant du zinc et du plomb, pour valoriser lesdits résidus ferreux Download PDF

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Publication number
WO2009129823A1
WO2009129823A1 PCT/EP2008/003274 EP2008003274W WO2009129823A1 WO 2009129823 A1 WO2009129823 A1 WO 2009129823A1 EP 2008003274 W EP2008003274 W EP 2008003274W WO 2009129823 A1 WO2009129823 A1 WO 2009129823A1
Authority
WO
WIPO (PCT)
Prior art keywords
iron
zinc
lead
sintering
mixture
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/EP2008/003274
Other languages
German (de)
English (en)
Inventor
Süleyman BASTÜRK
Thomas Degen
Andreas Franzen
Joachim Janz
Jörn PUFPAFF
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.)
ArcelorMittal Bremen GmbH
Original Assignee
ArcelorMittal Bremen 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 ArcelorMittal Bremen GmbH filed Critical ArcelorMittal Bremen GmbH
Priority to PCT/EP2008/003274 priority Critical patent/WO2009129823A1/fr
Publication of WO2009129823A1 publication Critical patent/WO2009129823A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/16—Sintering; Agglomerating
    • C22B1/20—Sintering; Agglomerating in sintering machines with movable grates
    • 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
    • C22B1/16—Sintering; Agglomerating
    • C22B1/20—Sintering; Agglomerating in sintering machines with movable grates
    • C22B1/205—Sintering; Agglomerating in sintering machines with movable grates regulation of the sintering process
    • 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
    • C22B19/28—Obtaining zinc or zinc oxide from muffle furnace residues
    • 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
    • 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

  • iron ore is often first sintered in a sintering plant into an ore sinter, the ore sinter is converted into pig iron in the blast furnace, and finally the pig iron is converted into steel in a converter.
  • an aggregate for crude steel production is
  • a zinc- and / or lead-containing sinter or briquette is produced from the zinc- and / or lead-loaded materials, which is heated in a shaft furnace, for example a blast furnace, cupola furnace or oxycopper. Furnace is smelted. The operation of the shaft furnace with highly zinc-containing sinter is energetically inefficient and very maintenance-intensive.
  • the object of the present invention was therefore to provide improved processes for the production of a lead and / or zinc concentrate with which, in particular, zinc-loaded iron-containing starting materials (iron carriers) can be used economically. Furthermore, in particular, zinc loaded iron residual materials should be made usable for use in steelmaking.
  • a calcium ferrite sinter is a sintered material, suitably melt-sintered, with a content of dicalcium ferrite 2CaO Fe 2 O 3 , calcium monoferritic CaO Fe 2 O 3 and / or calciumtrust CaO-2Fe 2 O 3 .
  • Such sinters are previously known only as additives for use in blast furnaces and in the Siemens-Martin process (see Cappel, Wendeborn: sintering of iron ore, Dusseldorf 1973, pages 179-188).
  • An oxygen blowing method is a method of frying iron for producing steel, wherein the carbon-rich iron (pig iron) is injected with oxygen or a gas having an oxygen content of at least 30 mol% to produce low-carbon steel.
  • the Siemens-Martin process of steelmaking is not an oxygen blowing process in the sense of the invention.
  • a preferred blowing method is the Linz-Donawitz method (LD method).
  • LD method Linz-Donawitz method
  • a converter is charged with liquid pig iron and usually scrap and / or sponge iron. Through a water-cooled oxygen lance becomes oxygen blown on the molten iron;
  • an inert gas such as argon is injected through nozzles in the converter bottom for better mixing.
  • the oxygen blowing time is chosen so that the finished steel has a desired content of carbon and undesired admixtures are burned or converted to slag.
  • the technical implementation of the suction traction sintering process is critical with regard to the melting behavior and the energy content of the starting materials, since on the one hand melting is required in order to achieve sintering together, but on the other hand the throughflow of the material with process gas must be ensured.
  • Another problem with the formation of molten areas is the caking of the material on the grate of the suction train.
  • a layer of a sieve fraction of the product is usually applied as Rostbeiag, the effect of which, however, is only very limited in practice.
  • a residual iron material is a material which, in addition to iron, also contains at least 0.2% by weight of zinc or lead.
  • residual iron material refers to steelworks and blast furnace residues, gout and converter dusts as well as corresponding sludges such as LD fine sludge and scrap, and mixtures of two or more of these materials
  • zinc can lead to buildup and damage to the blast furnace, and the process according to the invention makes it possible for the first time to economically utilize iron residual material for recovery, while at the same time avoiding the sintering step for concentrating the non-iron metal or metals ,
  • the iron-containing starting material used in the process according to the invention has a ratio% Fe /% Zn (iron-zinc ratio) of at most 200,% Fe being the proportion of iron in the iron carrier and% Zn the proportion of zinc in the iron carrier, in each case wt .-%. It has now been found that in particular zinc-loaded iron-containing starting materials and in particular blast furnace and steel mill dusts and corresponding gas scrubber sludges can be converted by sintering into a calcium ferrite sinter, whereby at the same time zinc is precipitated from the iron-containing starting material. driven and can be obtained from the sintered gas phase in concentrated form.
  • the calcium ferrite sinter has a basicity CaGVSiO 2 of> 1, more preferably of> 2 and particularly preferably of 4-5. It is likewise preferred if the calcium ferrite sinter according to the invention has a C value of> 0.5 in accordance with the formula given above.
  • the inventive method is operated so that a sintering gas phase of the Saugzugsinterns collected and zinc or lead-containing expelled material is separated from the sintering gas phase.
  • the separation from the sintering gas phase can be effected by a conventional method, preferably by electrofiltration.
  • a zinc-containing iron carrier is used in step a) and an expelled material in step d) a zinc content of at least 40 wt .-% is obtained.
  • a zinc content of at least 40 wt .-% is obtained.
  • the iron carrier provided in step a) preferably comprises a material having a crumbly shape with an average grain size (median) of 1-15 mm, preferably 2-8 mm.
  • the crumbly material is preferably an iron residual material.
  • the sinter mixture is applied to any sinter grid with rust coating.
  • the rust covering preferably contains a proportion of at least 40 wt .-% CaO in the ignition residue.
  • a particularly preferred rust coating is limestone chippings. Even with the usual fluctuations in the composition of the sintered material, this rust coating avoids a breakthrough of molten material and a caking of the sintering mixture on the sintering grid.
  • the iron carrier used is preferably an iron residual material with a proportion of at least 30% by weight, preferably at least 50% by weight, of blast furnace dust, steel mill dust and / or converter dust. This material can also be used in the form of possibly dried sludge.
  • a particular advantage of the method according to the invention is that a suction melt internally formation of melt pools can be avoided. This was not to be expected, in particular in view of the cited publication by Nakano, and also permits the use of the process according to the invention on an industrial scale, for example with a monthly conversion of 150,000 t of iron residual material.
  • the Calciumferritsinter of the method according to the invention preferably has a proportion of 30 wt .-% dicalcium ferrite, 2CaO • Fe 2 O 3, preferably 40 wt .-% to 100 wt .-% dicalcium ferrite, 2CaO • Fe 2 O 3 and particularly preferably 80% by weight to 100 wt .-% Dicalciumferrit 2CaO - Fe 2 O 3 , based on the total calcium ferrite sintered on.
  • the Calciumferritsinter has a proportion of iron oxide Fe 2 O 3 from 70 to 90 wt .-%.
  • the sintering mixture is preferably applied to the rust coating of the sintering grid as a uniform mixture without layering. This facilitates carrying out the method according to the invention in the abovementioned industrial scale. In this case, a sintering mixture still applies as uniform without stratification, if it is partially separated by a flow of material in bulk operations.
  • LD fine sludge is dewatered by repeated redeposition and brought into a recoverable, crumbly state.
  • the sludge is mixed with 100% limestone, 25% coke breeze, 4% quicklime and water and placed on a sintering grate, which was previously covered with 47 kg / m 2 limestone chippings with a grain size of 10 to 12.5 mm.
  • the percentage figures are mass ratios in moist, based on the wet LD fine sludge.
  • the sintering grate is extracted from below. After ignition of the surface, the firing front burns down. After completion of the sintering process, the resulting sinter cake is discarded and used in the LD converter.
  • the LD fine sludge had 3.4%, the limestone sand 7.1% and the coke breeze 13.8% water content.

Landscapes

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

Abstract

L'invention concerne un procédé utilisé pour valoriser des supports de fer contenant du zinc et/ou du plomb, notamment des matériaux résiduels à base de fer issus de la production de fer et de celle de l'acier. Les supports de fer contenant du zinc et/ou du plomb sont mélangés avec un complément à base de calcium de manière à former un mélange de frittage, ce dernier étant fritté sur l'installation de frittage par courant descendant. Les produits frittés à base de ferrite de calcium obtenus contiennent de préférence entre 40 et 100% en poids de ferrite de calcium et entre 70 à 90% en poids d'oxyde de fer Fe203.
PCT/EP2008/003274 2008-04-23 2008-04-23 Production de produits frittés à base de ferrite de calcium, à partir de résidus ferreux contenant du zinc et du plomb, pour valoriser lesdits résidus ferreux Ceased WO2009129823A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2008/003274 WO2009129823A1 (fr) 2008-04-23 2008-04-23 Production de produits frittés à base de ferrite de calcium, à partir de résidus ferreux contenant du zinc et du plomb, pour valoriser lesdits résidus ferreux

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2008/003274 WO2009129823A1 (fr) 2008-04-23 2008-04-23 Production de produits frittés à base de ferrite de calcium, à partir de résidus ferreux contenant du zinc et du plomb, pour valoriser lesdits résidus ferreux

Publications (1)

Publication Number Publication Date
WO2009129823A1 true WO2009129823A1 (fr) 2009-10-29

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Family Applications (1)

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PCT/EP2008/003274 Ceased WO2009129823A1 (fr) 2008-04-23 2008-04-23 Production de produits frittés à base de ferrite de calcium, à partir de résidus ferreux contenant du zinc et du plomb, pour valoriser lesdits résidus ferreux

Country Status (1)

Country Link
WO (1) WO2009129823A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104843799A (zh) * 2015-04-12 2015-08-19 耿兆翔 氧化铁粉末中粉末氧化铝或/和氧化钙的分离回收方法
EP3029166A4 (fr) * 2013-07-30 2016-12-07 Univ Tohoku Procédé de récupération de zinc à partir de poussière de production d'acier en four électrique et dispositif de récupération de zinc à partir de poussière de production d'acier en four électrique
CN116622939A (zh) * 2023-06-29 2023-08-22 中天钢铁集团有限公司 一种降低转炉钢铁料消耗的冶炼方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3313617A (en) * 1964-02-06 1967-04-11 Mcdowell Wellman Eng Co Iron-containing flux material for steel-making process
US4063930A (en) * 1974-11-22 1977-12-20 Republic Steel Corporation Preparation of weatherable ferrite agglomerate
EP0150805A2 (fr) * 1984-01-26 1985-08-07 Sumitomo Heavy Industries, Ltd Méthode de récupération de zinc à partir de substances contenant un composé du zinc
EP1002881A1 (fr) * 1996-12-19 2000-05-24 Eduard Dantenovich Babaev Fondant a base de ferrite et de calcium, melange destine a sa production et utilisation de ce fondant
WO2008046452A1 (fr) * 2006-10-20 2008-04-24 Arcelormittal Bremen Gmbh Produit fritté de ferrite de calcium, procédé de production et utilisation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3313617A (en) * 1964-02-06 1967-04-11 Mcdowell Wellman Eng Co Iron-containing flux material for steel-making process
US4063930A (en) * 1974-11-22 1977-12-20 Republic Steel Corporation Preparation of weatherable ferrite agglomerate
EP0150805A2 (fr) * 1984-01-26 1985-08-07 Sumitomo Heavy Industries, Ltd Méthode de récupération de zinc à partir de substances contenant un composé du zinc
EP1002881A1 (fr) * 1996-12-19 2000-05-24 Eduard Dantenovich Babaev Fondant a base de ferrite et de calcium, melange destine a sa production et utilisation de ce fondant
WO2008046452A1 (fr) * 2006-10-20 2008-04-24 Arcelormittal Bremen Gmbh Produit fritté de ferrite de calcium, procédé de production et utilisation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3029166A4 (fr) * 2013-07-30 2016-12-07 Univ Tohoku Procédé de récupération de zinc à partir de poussière de production d'acier en four électrique et dispositif de récupération de zinc à partir de poussière de production d'acier en four électrique
CN104843799A (zh) * 2015-04-12 2015-08-19 耿兆翔 氧化铁粉末中粉末氧化铝或/和氧化钙的分离回收方法
CN116622939A (zh) * 2023-06-29 2023-08-22 中天钢铁集团有限公司 一种降低转炉钢铁料消耗的冶炼方法

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