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EP0912770A1 - Procede de traitement thermique de materiaux contamines par des matieres organiques - Google Patents

Procede de traitement thermique de materiaux contamines par des matieres organiques

Info

Publication number
EP0912770A1
EP0912770A1 EP97929015A EP97929015A EP0912770A1 EP 0912770 A1 EP0912770 A1 EP 0912770A1 EP 97929015 A EP97929015 A EP 97929015A EP 97929015 A EP97929015 A EP 97929015A EP 0912770 A1 EP0912770 A1 EP 0912770A1
Authority
EP
European Patent Office
Prior art keywords
layer
organic substances
thermal treatment
ignition
takes place
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
EP97929015A
Other languages
German (de)
English (en)
Inventor
Wolfgang Trimmel
Johann Lehner
Oskar Pammer
Hans Stiasny
Heinz Schöllnhammer
Hubert Zellner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Primetals Technologies Austria GmbH
Original Assignee
Voest Alpine Industrienlagenbau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voest Alpine Industrienlagenbau GmbH filed Critical Voest Alpine Industrienlagenbau GmbH
Publication of EP0912770A1 publication Critical patent/EP0912770A1/fr
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
    • 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
    • C22B1/244—Binding; Briquetting ; Granulating with binders organic
    • 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
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S75/00—Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures
    • Y10S75/962—Treating or using mill scale

Definitions

  • the invention relates to a method for the thermal conversion of organic substances and materials containing organic substances in a two-layer sintering process, a second layer being applied after the first layer has been ignited
  • mill scale is a by-product.
  • the mill scale which consists of fine particles, enters the water cycle from the rolling process and is separated out as mill scale sludge.
  • the mill scale is always contaminated with organic separating and flotation agents, making it a disposal product and to process it
  • EP 0 437 407 A1 discloses a method in which, after application and ignition of a first background layer, which can also contain solid fuels and volatile organic substances in iron-ore-containing material, a second layer, which optionally also contains solid fuels and vaporizable organic substances an ore matrix can be applied and sintered.
  • this second sintered layer is delayed, the ignition point being determined by measuring the exhaust gas temperature and / or chemical analysis of the exhaust gases.
  • sintered layers are formed which, due to the composition and the procedure, are difficult to gasify.
  • the object of the invention is therefore to create a method in which the second layer has a better sintering quality and also improved exhaust gas values are achieved.
  • the object is characterized in that 'the second, containing the organic substances layer with a maximum layer thickness of 20% of the first layer is applied and that is started with a heat treatment of the second layer when the focal zone of the first layer, the combustion of, the pressure difference following, from the second layer entering the burning zone of the first layer to at least 70% organic matter and the area above the Firing zone of the first layer still has a temperature that prevents condensation of the organic substances entering the first layer from the second layer.
  • the thermal treatment of the second layer is started at 30-70% of the total sintering time, preferably at 50-60% from the start of the ignition of the first layer to the chemical burn-through point.
  • the burning zone of the background layer is already fully developed and there is still enough burning time left for optimal combustion of the organic matter from the second layer.
  • the thermal treatment of the second layer takes place at a temperature of the first layer of at least 400 ° C.
  • the thermal decomposition of organic substances is not guaranteed below 400 ° C. Without the inclusion of cathalytic effects, which reduce the activation energy, a thermal dissociation of the organic substances from 600 ° C can be expected
  • the thermal treatment of the second layer begins at an exhaust gas temperature of at least 50 ° C. Condensation of volatile substances is thereby prevented.
  • a further feature of the invention is that additives, preferably metallothermic substances, are added to the organic layer and materials containing organic substances in the second layer.
  • additives preferably metallothermic substances
  • the advantage here is that on the one hand the melting behavior of the sintered layer can be controlled and on the other hand a uniform sintering-through layer with good gas permeability is achieved.
  • the gas mixture preferably air, required for the thermal treatment and transport of the organic substances is sucked through the sintered layers. This ensures uniform burning of the sintered layers and quantitative burning of the organic substances
  • the thermal treatment of the second layer takes place under oxidizing conditions. This measure can also destroy stable organic substances
  • the thermal treatment of the second layer takes place under reducing conditions. This enables safe degradation in the case of strongly oxidizing sinter mixtures
  • the thermal treatment of the second layer is carried out by external heat supply. Because of this embodiment, it is possible to sinter mixtures which are thermally abnormal and not sintered through by the energy content of the sintered mixture
  • the external heat supply for the thermal treatment of the second layer is carried out by supplying electrical energy, preferably by means of a resistance heater. This measure ensures a particularly precise supply of thermal energy in the case of particularly contaminated substance mixtures. The fact that the thermal treatment the second layer without an open flame opens up another area of application
  • the thermal treatment of the second layer is started by ignition.
  • the external heat supply can be dispensed with in the case of exothermic mixtures
  • the burn-up curve 6 of the first layer (5) extends from the ignition point 1 to the first corner point of the burn-off curve 6, the spatial burn-through point 2, and continues to burn to the second corner point of the burn-off curve, the chemical burn-through point 3.
  • the beginning of the thermal treatment 7 of the second sintered layer 8 is predetermined at time 4 due to the characteristic of the burnup curve 6 of the background layer 5.
  • the layer thickness of the background layer 5 in this exemplary embodiment is approximately 500 mm and that of the second sinter layer 8 is 40 mm.
  • the total sintering time of the first layer is the interval between markings 1 and 3.
  • the application of the background layer 5 and the ignition at the time of ignition 1 take place in such a way that the burn-off curve 6 has a thickness of at least 30 mm in the area where its upper edge lies around 150 mm below the upper edge of the background layer 5 if the spatial burn-through point 2 is at is at least 85% of the length of the suction surface of the sintering machine
  • the feed material for the sintered layer 8 is homogenized and pre-agglomerated with the added metallochemical substances in special intensive mixing and rolling devices, in order to ensure a layer of good gas permeability and defined melting behavior after the combustion Gas and the oxidation potential of the second sintered layer 8 result in the most quantitative possible degradation of the organic substances.
  • the second sintered layer 8 is applied in the area of the background layer 5, where the upper edge of the burning zone of the background layer 5 lies at most 150 mm below the surface of the background layer 5 and the burn-off curve 6 is already fully developed, but is at least 30 mm thick.
  • the thermal treatment of the sintered layer 7 is started at the earliest when the exhaust gas temperature of the sintered exhaust gases has ideally exceeded 100 ° C.

Landscapes

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

Abstract

L'invention a pour but de créer un procédé dans lequel la deuxième couche présente une meilleure qualité de frittage et permettant d'obtenir, en outre, un taux de gaz résiduaires amélioré. Le procédé selon l'invention pour la transformation thermique de matériaux renfermant des matières organiques, dans un procédé de frittage en deux couches, consiste à appliquer, après amorçage de la première couche (1), une deuxième couche (8) renfermant les matières organiques, d'une épaisseur maximale de 20 % de la première couche, et à traiter ensuite thermiquement la deuxième couche, lorsque la zone de combustion de la première couche garantit à au moins 70 % la combustion des matières organiques parvenant, consécutivement à la différence de pression, de la deuxième couche dans la zone de combustion de la première couche. La zone au-dessus de la zone de combustion de la première couche doit encore présenter une température empêchant une condensation des matières organiques parvenant de la deuxième couche dans la première couche.
EP97929015A 1996-07-11 1997-07-07 Procede de traitement thermique de materiaux contamines par des matieres organiques Ceased EP0912770A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT0125096A AT405530B (de) 1996-07-11 1996-07-11 Verfahren zur thermischen behandlung von organisch belasteten materialien
AT1250/96 1996-07-11
PCT/AT1997/000153 WO1998002593A1 (fr) 1996-07-11 1997-07-07 Procede de traitement thermique de materiaux contamines par des matieres organiques

Publications (1)

Publication Number Publication Date
EP0912770A1 true EP0912770A1 (fr) 1999-05-06

Family

ID=3509849

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97929015A Ceased EP0912770A1 (fr) 1996-07-11 1997-07-07 Procede de traitement thermique de materiaux contamines par des matieres organiques

Country Status (7)

Country Link
US (1) US6162280A (fr)
EP (1) EP0912770A1 (fr)
JP (1) JP2000514503A (fr)
AT (1) AT405530B (fr)
BR (1) BR9710287A (fr)
CZ (1) CZ295680B6 (fr)
WO (1) WO1998002593A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HUP0600317A2 (en) 2006-04-24 2008-08-28 Bem Zrt Recicling and transformation of hazardous wastes and of metals, metal oxides at industrial starting material
JP6183623B2 (ja) * 2014-03-28 2017-08-23 Ｊｆｅスチール株式会社 鉄系含油スラッジを原料に用いる焼結鉱の製造方法および鉄系含油スラッジの処理方法
JP6225926B2 (ja) * 2015-01-30 2017-11-08 Ｊｆｅスチール株式会社 含油ダストスラッジの処理方法および製鉄原料の製造方法
JP7606083B2 (ja) * 2020-02-21 2024-12-25 日本製鉄株式会社 焼結鉱の製造方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1361191A1 (ru) * 1986-03-28 1987-12-23 Институт газа АН УССР Способ агломерации рудных материалов
EP0437407B1 (fr) 1990-01-11 1995-03-29 Sumitomo Metal Industries, Ltd. Méthode de frittage de minerais de fer fin, utilisant deux systèmes d'allumage
DE4008027C1 (fr) * 1990-03-10 1991-05-23 Stahlwerke Peine-Salzgitter Ag, 3150 Peine, De
US5382279A (en) * 1994-01-07 1995-01-17 Bethlehem Steel Corporation Method and apparatus for combustion of steel plant wastes
DE4414321A1 (de) * 1994-04-25 1995-10-26 Res Oesterreich Kg Gmbh & Co Verfahren und Anlage zur Verwertung von mit organischen Rückständen versetzten Reststoffen sowie Sinter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9802593A1 *

Also Published As

Publication number Publication date
ATA125096A (de) 1999-01-15
CZ3299A3 (cs) 2000-04-12
WO1998002593A1 (fr) 1998-01-22
JP2000514503A (ja) 2000-10-31
BR9710287A (pt) 1999-08-17
US6162280A (en) 2000-12-19
AT405530B (de) 1999-09-27
CZ295680B6 (cs) 2005-09-14

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