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WO1999009224A1 - Procede et installation pour traiter des residus siderurgiques renfermant du fer ou de l'huile - Google Patents

Procede et installation pour traiter des residus siderurgiques renfermant du fer ou de l'huile Download PDF

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Publication number
WO1999009224A1
WO1999009224A1 PCT/AT1998/000172 AT9800172W WO9909224A1 WO 1999009224 A1 WO1999009224 A1 WO 1999009224A1 AT 9800172 W AT9800172 W AT 9800172W WO 9909224 A1 WO9909224 A1 WO 9909224A1
Authority
WO
WIPO (PCT)
Prior art keywords
oil
fraction
mixer
melting
quicklime
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/AT1998/000172
Other languages
German (de)
English (en)
Inventor
Johann Lehner
Alexander Fleischanderl
Günter SCHREY
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
Priority to BR9811891A priority Critical patent/BR9811891A/pt
Priority to EP98931816A priority patent/EP1007748A1/fr
Priority to CA 2298504 priority patent/CA2298504A1/fr
Publication of WO1999009224A1 publication Critical patent/WO1999009224A1/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
    • C22B7/001—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
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/242—Binding; Briquetting ; Granulating with binders
    • C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
    • 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
    • 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 relates to a method for processing iron and oil-containing metallurgical residues, in particular mill scale, and for recycling the iron and oil-containing metallurgical residues in a melting and / or reduction unit, and a plant for carrying out the method.
  • a method of this type is known for example from DE-A-4 101 584. After adding molasses and calcium hydroxide, mill scale is briquetted as a binder and reused in the steelmaking process. This process is complex and expensive.
  • a method for recycling oil-containing mill scale which is similar to the method described in DE-A-4 101 584 and also has its disadvantages, is also known from US-A-4,585,475.
  • oil-containing mill scale is mixed with a binder, such as a mixture of molasses and calcium hydroxide or a mixture of sodium silicate and Portland cement, the mixture is agglomerated and the agglomerates formed are used in a molten steel bath. If necessary, iron oxide fine particles are also mixed into the mill scale.
  • a disadvantage of these known processes is that in addition to lime, in the form of limestone or calcium hydroxide, another binder must be added in any case in order to apply the appropriate binding forces for agglomeration.
  • the object of the invention while avoiding a thermal oil removal route, is to improve and further develop these known processes in such a way that complete and nevertheless very economical processing of the iron and oil-containing metallurgical residues and recycling in a melting and or reducing unit by admixing only one single binder is made possible.
  • the method according to the invention should be able to be implemented with only low investment costs.
  • This object is achieved according to the invention in that the iron and oil-containing huttentechnikreststoffe, if necessary after admixing other oil-containing fractions, such as waste oil, are mixed with quick lime, preferably hard quick lime, and in that the ⁇ eselfbare fraction formed, optionally after an intermediate treatment, in the melting and / or reducing unit is introduced
  • a method for binding oils present in water (motor oils or other waste oils) or liquid chemical waste materials for the purpose of rendering them harmless with quicklime is known, for example, from AT-B-335 375. It is essential in this method that the quicklime becomes hydrophobic, which means that the 01 or the Liquid chemical waste can be finely dispersed in the pre-treated lime and placed in a landfill
  • a process for the disposal of mineral oil-containing wastes and sludges, whereby a water-repellent reaction product which can be used as a substructure material is formed, is known from AT-B-367 088.
  • mineral oil-containing material is sprinkled with a lime-containing reaction agent, as a result of which a fine-grain, water-impermeable reaction product is obtained, which can be used as a building material
  • iron and oil-containing hut mill residues are preferably with an amount M (wt -%)
  • A is dependent on the reaction temperature and the residence time during mixing and is preferably selected from a range from 1.0 to 3.0, particularly preferably from 1.5 to 2.5,
  • F is the residual moisture in% by weight
  • B is dependent on the properties of the quicklime, the type of oil and the residual moisture and is preferably selected from a range from 0.1 to 0.5,
  • G is the oil content in% by weight
  • C is dependent on the reactivity of the quicklime and the residual moisture and is preferably selected from a range from 0 to 5
  • the iron and oil-containing waste from the hut works are preferably processed with a residual moisture content of 5 to 15%
  • the free-flowing fraction formed from the iron- and oil-containing waste material and from quicklime is mixed with other waste material, in particular dust from dry filter systems and / or sludges from wet washers, and the mixture thus formed agglomerates agglomerates formed in this way are introduced into the melting and / or reducing unit, optionally after drying
  • the iesilable fraction formed from the iron and oil-containing waste materials and from quicklime is blown into the melting and / or reducing unit, preferably after comminution, preferably with a particle size of ⁇ 5 mm
  • the ⁇ eselfahiges fraction formed from the iron and oil-containing Huttenwerkreststoffe and from quicklime is first sieved, whereby a coarse and fine fraction of the free-flowing fraction is obtained
  • the fine fraction in particular with a grain size ⁇ 5 mm, is preferably blown into the melting and / or reducing unit
  • the fine fraction in particular with a grain size of ⁇ 5 mm, is initially mixed with other hut material residues, in particular dust from dry filter systems and / or sludges from wet washers, and the mixture formed in this way is then agglomerated.
  • the agglomerates formed in this way are introduced into the melting and / or reduction unit, if appropriate after drying
  • the coarse fraction is preferably introduced directly into the melting and / or reducing unit.
  • the coarse fraction in particular with an oil content of ⁇ 0.2%, is expediently introduced into a sintering device and used by the sintering device in a blast furnace
  • the iron and oil-containing waste material from the hut works together with other waste material from the hut, in particular dust from dry filter systems and / or sludge from wet washers and optionally other oil-containing fractions, such as waste oil, homogenized and mixed with quicklime, the mixture formed is agglomerated, and the agglomerates thus formed are introduced into the melting and / or reduction unit, if appropriate after drying
  • a plant for carrying out the method according to the invention is characterized in that a first mixer for mixing iron and oil-containing waste materials and possibly other oil-containing fractions, such as waste oil, is provided with quicklime and that the first mixer with a melting and / or Reduction unit is connected
  • a comminution device in particular a grinding device, is provided next to the first mixer for comminuting the free-flowing fraction
  • the comminution device is advantageously connected to blowing devices, in particular blowing lances, for blowing the comminuted free-flowing fraction into the melting and / or reducing unit.
  • a further mixer is expediently provided next to the comminution device, into which a feed line for other residues of hut works, in particular for dust from dry filter systems and / or for sludges from wet washers, is merged, and an agglomeration device for agglomerating the mixture formed in the second mixer is then connected to the second mixer and then, if necessary, a drying device thereafter
  • a sieving device for sieving the free-flowing fraction is provided next to the first mixer, from which a discharge for a fine fraction and a discharge for a coarse fraction originate.
  • the discharge line for the fine fraction is preferably connected to blowing devices, preferably blowing lances, for blowing the fine fraction into the melting and / or reducing unit
  • the discharge for the fine fraction merges into a further mixer, in which there is also a feed line for other hut waste, in particular for dust from dry filter systems and / or for sludge from wet washers, , and after the second mixer, an agglomerating device for agglomerating the mixture formed in the second mixer and, if appropriate, a drying device thereafter are provided
  • the discharge for the coarse fraction expediently merges into the melting and / or reducing unit
  • a feed line for other waste materials flows into the first mixer, and is an agglomeration device for agglomerating that in the first mixer after the first mixer formed mixture and then optionally provided a drying device
  • iron and oil-containing waste mill residues 1, such as mill scale, optionally together with other oil-containing fractions, such as waste oil, are mixed with quicklime 3 in a first mixer 2, for example a ploughshare mixer, with the required amount M (% by weight) Quicklime 3 depends on the residual moisture of the material to be processed and its oil content, further on the reaction temperature and residence time in the mixer 2, on the type of oil and on the reactivity of quicklime 3
  • the quicklime 3 serves on the one hand as a dispersion carrier for 01, which is in a finely dispersed state Phase is transferred, and on the other hand as a binder for the production of thermal shock-resistant agglomerates in the event of agglomeration, as well as for reducing the moisture content
  • the required amount M of quicklime 3 is preferably calculated according to the following formula
  • A (A x F + B x G) + C
  • A is a factor dependent on the reaction temperature and the residence time during mixing for the required amount of quicklime 3
  • A is preferably from a range from 1.0 to 3.0, particularly preferably from a range from 1.5 to 2 , 5, selected.
  • F is the residual moisture of the material to be processed in% by weight.
  • B is a factor dependent on the properties of the quicklime 3, the type of oil and the residual moisture of the material to be processed and is preferably selected from a range from 0.1 to 0.5.
  • G is the oil content in% by weight. If quicklime 3 is very fine and easily dispersible for oils (i.e. easily wettable), little quicklime 3 is required and the factor B is small. In general, the factor B is chosen larger for a higher oil content, but smaller for a higher residual moisture
  • C is dependent on the reactivity of the quicklime 3 and the residual moisture of the material to be processed and is preferably selected from a range from 0 to 5. If the quicklime 3 exhibits poor dispergi behavior or reacts, a higher factor C is selected. A high factor C is also required if the material to be processed is very dry. Without the additional addition of quicklime 3, there is too little binder for subsequent agglomeration to achieve sufficient mechanical strength
  • a mill scale fraction has a moisture content of 10% by weight and an average oil content of 5% by weight.
  • This mill scale fraction is mixed with quicklime 3 of good quality with regard to the dispersion behavior and the hydration reaction, etc., the reaction temperature being about 70 ° C. and the residence time in the mixer 2 being a few minutes.
  • the processing of mill scale can also advantageously be carried out if the material to be processed is puncture-resistant. Since a certain proportion of binder, that is to say a certain amount of quicklime 3, is definitely required, the advantageous consistency of the is processing mill scale in the range of 5 to 15% residual moisture. However, the processing of iron and oil-containing hut material residues 1 with a residual moisture lying outside this range also poses no problems
  • a free-flowing, old-dispersed, dry fraction is formed in the mixer 2 by adding quicklime 3 to the iron- and oil-containing hut mill residues 1.
  • This free-flowing fraction 4 can be further processed in various ways.
  • the free-flowing fraction 4 is comminuted in a comminution device 5, for example a grinding device, preferably to a grain size of less than 5 mm.
  • This comminuted free-flowing fraction 4 can be melted and melted directly, for example by means of blowing lances / or reduction unit 6, for example a blast furnace 6a, a converter 6b or into an electric arc furnace 6c
  • dispersed hydrocarbons ie the dispersed oils
  • the quicklime 3 as a slag former
  • the free-flowing fraction 4 can, however, also be combined in a second mixer 7 with other non-oil-containing waste material 8, in particular with dust from dry filter systems and / or with sludges from wet washers.
  • sludges and dusts include, for example, converter dusts and sludges, blast furnace dust and sludges, dusts from electric arc furnaces, etc.
  • converter dusts and sludges include, for example, converter dusts and sludges, blast furnace dust and sludges, dusts from electric arc furnaces, etc.
  • the mixing ratio of the individual metallurgical waste fractions in the second mixer 7 mainly results from the quantities of the waste material from the hut and their chemical composition.
  • an agglomeration process such as pelleting, briquetting or extrusion, is carried out in an agglomerating device 9.
  • the agglomerates formed in this way are introduced into the melting and / or reducing unit 6 in a manner known per se.
  • drying of the agglomerates can advantageously also be provided in a drying device 10.
  • the agglomerates are preferably dried to a moisture content of less than 5% It may be necessary to screen a fine fraction 1 1, advantageously with a grain size of less than 5 mm. This fine fraction 11 can either be blown into the melting and / or reducing unit 6 or can be recycled for further processing, advantageously in the first mixer 2.
  • the free-flowing fraction 4 is separated into a fine fraction 11 and a coarse fraction 13 by means of a sieve device 12.
  • the coarse fraction 13, e.g. Rolling scale flakes, which have a grain size of greater than 5 mm, for example, are either introduced directly into the melting and / or reducing unit 6 or, if their oil content is less than about 0.2% by weight, fed to a sintering device 14.
  • the coarse fraction 13 can then be returned from the sintering device 14 to a blast furnace 6a.
  • the fine fraction 1 which for example has a grain size of less than 5 mm, is either directly, e.g. by means of blowing lances, blown into the melting and / or reducing unit 6, or, as described above, mixed with other hut material residues 8, agglomerated and introduced into the melting and / or reducing unit 6 in this way.
  • the iron and oil-containing waste mill residues 1 are homogenized in the first mixer 2 together with the other waste mill residues 8 and mixed with quicklime 3, optionally with the addition of water.
  • the mixture formed in this way is fed to the agglomerating device 9, and the agglomerates thus formed are in turn introduced into the melting and / or reducing unit 6.
  • all iron-containing dust and sludge fractions occurring in a metallurgical plant with and without oil content are combined in one step into a single mixture of substances and agglomerated by adding quicklime 3.
  • the invention is not limited to the embodiments shown in the drawing.
  • the process variants described above can be used in combination if necessary (for example, very large amounts of metallurgical residues).
  • intermediate bunkers are provided in the line connections between the individual treatment stations (for example mixer 2, screening device 12, etc.).

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

Abstract

L'invention concerne un procédé pour traiter des résidus sidérurgiques (1) renfermant du fer ou de l'huile et pour les recycler dans un ensemble de fusion et/ou de réduction (6). A cet effet, les résidus sidérurgiques (1) renfermant du fer ou de l'huile sont mélangés avec de la chaux vive (3), le cas échéant après addition d'autres fractions renfermant de l'huile, par exemple de l'huile usée, puis la fraction coulante ainsi obtenue (4) est introduite, le cas échéant après avoir subi un traitement intermédiaire, dans l'ensemble de fusion et/ou de réduction (6).
PCT/AT1998/000172 1997-08-12 1998-07-15 Procede et installation pour traiter des residus siderurgiques renfermant du fer ou de l'huile Ceased WO1999009224A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BR9811891A BR9811891A (pt) 1997-08-12 1998-07-15 Método e equipamento para processamento de materiais residuais de usinas de fundição contendo ferro e óleo
EP98931816A EP1007748A1 (fr) 1997-08-12 1998-07-15 Procede et installation pour traiter des residus siderurgiques renfermant du fer ou de l'huile
CA 2298504 CA2298504A1 (fr) 1997-08-12 1998-07-15 Procede et installation pour traiter des residus siderurgiques renfermant du fer ou de l'huile

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0134797A AT406056B (de) 1997-08-12 1997-08-12 Verfahren und anlage zum verarbeiten von eisen- und ölhältigen hüttenwerksreststoffen
ATA1347/97 1997-08-12

Publications (1)

Publication Number Publication Date
WO1999009224A1 true WO1999009224A1 (fr) 1999-02-25

Family

ID=3511934

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT1998/000172 Ceased WO1999009224A1 (fr) 1997-08-12 1998-07-15 Procede et installation pour traiter des residus siderurgiques renfermant du fer ou de l'huile

Country Status (5)

Country Link
EP (1) EP1007748A1 (fr)
AT (1) AT406056B (fr)
BR (1) BR9811891A (fr)
CA (1) CA2298504A1 (fr)
WO (1) WO1999009224A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001079124A1 (fr) * 2000-04-18 2001-10-25 Voest-Alpine Industrieanlagenbau Gmbh & Co. Procede et dispositif pour le traitement de boues de pailles
EP1905853A1 (fr) * 2006-09-29 2008-04-02 Paul Wurth S.A. Procédé de traitement thermique de résidus métalliques contaminés par des composés organiques et dispositif pour sa mise en oeuvre

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10207202B9 (de) * 2002-02-21 2006-05-04 Code Gmbh Commercial Developments Verfahren zur metallurgischen Verwertung von metallhaltigen Schlämmen und Stäuben

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS544214A (en) * 1977-06-13 1979-01-12 Sumitomo Metal Ind Ltd Converter flux
JPS5953636A (ja) * 1982-09-22 1984-03-28 Nippon Kokan Kk <Nkk> 焼結鉱の製造方法
JPS60230928A (ja) * 1984-04-27 1985-11-16 Sumitomo Metal Ind Ltd フオ−ミング鎮静剤およびその製造方法
US4585475A (en) * 1980-06-25 1986-04-29 Inland Steel Company Method for recycling oily mill scale

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT399887B (de) * 1993-06-21 1995-08-25 Voest Alpine Ind Anlagen Verfahren zum herstellen von kaltgepressten eisenhältigen briketts
US5516976A (en) * 1994-08-26 1996-05-14 Southwind Enterprises Inc. Sulphate agglomeration
AT405054B (de) * 1997-06-18 1999-05-25 Voest Alpine Ind Anlagen Verfahren und anlage zum herstellen einer eisenschmelze unter einsatz von eisenhältigen hüttenwerksreststoffen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS544214A (en) * 1977-06-13 1979-01-12 Sumitomo Metal Ind Ltd Converter flux
US4585475A (en) * 1980-06-25 1986-04-29 Inland Steel Company Method for recycling oily mill scale
JPS5953636A (ja) * 1982-09-22 1984-03-28 Nippon Kokan Kk <Nkk> 焼結鉱の製造方法
JPS60230928A (ja) * 1984-04-27 1985-11-16 Sumitomo Metal Ind Ltd フオ−ミング鎮静剤およびその製造方法

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 7907, Derwent World Patents Index; Class M24, AN 79-13324B, XP002079604 *
PATENT ABSTRACTS OF JAPAN vol. 008, no. 150 (C - 233) 12 July 1984 (1984-07-12) *
PATENT ABSTRACTS OF JAPAN vol. 010, no. 098 (C - 339) 15 April 1986 (1986-04-15) *
See also references of EP1007748A1 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001079124A1 (fr) * 2000-04-18 2001-10-25 Voest-Alpine Industrieanlagenbau Gmbh & Co. Procede et dispositif pour le traitement de boues de pailles
EP1905853A1 (fr) * 2006-09-29 2008-04-02 Paul Wurth S.A. Procédé de traitement thermique de résidus métalliques contaminés par des composés organiques et dispositif pour sa mise en oeuvre
WO2008037703A1 (fr) * 2006-09-29 2008-04-03 Paul Wurth S.A. Procede de traitement thermique de residus metalliques contamines par des composes organiques et dispositif pour sa mise en oeuvre
EA012963B1 (ru) * 2006-09-29 2010-02-26 Поль Вурт С.А. Способ очистки загрязнённых металлических отходов и устройство для его осуществления
AU2007302049B2 (en) * 2006-09-29 2011-05-12 Paul Wurth S.A. Process for the heat treatment of metallic residues contaminated by organic compounds, and device for its implementation
US7951221B2 (en) 2006-09-29 2011-05-31 Paul Wurth S.A. Process for the treatment of contaminated metal residues and apparatus for implementing it

Also Published As

Publication number Publication date
BR9811891A (pt) 2000-08-22
ATA134797A (de) 1999-06-15
AT406056B (de) 2000-02-25
CA2298504A1 (fr) 1999-02-25
EP1007748A1 (fr) 2000-06-14

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