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1. WO2000039351 - EAF DUST TREATMENT BY PELLETISING AND FLUIDISED-BED REDUCTION

Publication Number WO/2000/039351
Publication Date 06.07.2000
International Application No. PCT/IB1999/002036
International Filing Date 22.12.1999
Chapter 2 Demand Filed 23.06.2000
IPC
C21B 13/00 2006.01
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
BMANUFACTURE OF IRON OR STEEL
13Making spongy iron or liquid steel, by direct processes
C22B 1/24 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
1Preliminary treatment of ores or scrap
14Agglomerating; Briquetting; Binding; Granulating
24Binding; Briquetting
C22B 7/02 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
7Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
02Working-up flue dust
CPC
C21B 13/0033
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
BMANUFACTURE OF IRON OR STEEL
13Making spongy iron or liquid steel, by direct processes
0033In fluidised bed furnaces or apparatus containing a dispersion of the material
C22B 1/2413
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
1Preliminary treatment of ores or scrap
14Agglomerating; Briquetting; Binding; Granulating
24Binding; Briquetting ; ; Granulating
2413enduration of pellets
C22B 7/02
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
7Working 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
02Working-up flue dust
Y02P 10/143
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
10Technologies related to metal processing
10Reduction of greenhouse gas [GHG] emissions
14Greenhouse gases [GHG] other than CO2
143Methane [CH4]
Y02P 10/212
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
10Technologies related to metal processing
20Process efficiency
21by recovering materials
212Recovering metals from waste
Applicants
  • L & C STEINMULLER (AFRICA) (PROPRIETARY) LIMITED [ZA/ZA]; 12 Autumn Street Rivonia 2128 Sandton, ZA (AllExceptUS)
  • BLOM, Peter, William, Ennis [ZA/ZA]; ZA (UsOnly)
Inventors
  • BLOM, Peter, William, Ennis; ZA
Agents
  • BROWN, Keith, Edwin, Frank; Spoor and Fisher Rochester Place, 173 Rivonia Road Morningside, Sandton P.O. Box 41312 2024 Craighall, ZA
Priority Data
98/1185323.12.1998ZA
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) EAF DUST TREATMENT BY PELLETISING AND FLUIDISED-BED REDUCTION
(FR) TRAITEMENT DE LA POUSSIERE DE FOUR ELECTRIQUE A ARC PAR BOULETAGE ET REDUCTION PAR LIT FLUIDISE
Abstract
(EN)
The invention concerns a process for the treatment of EAF (electric arc furnace) dust. In the process preheated and decontaminated EAF dust is introduced into a fluidised bed reactor in which hematite is reduced by means of a hot reducing gas generated by reforming natural gas in a non-catalytic plasma-arc heating process. This produces an iron-rich material suitable for recycling to the electric arc furnace. The invention is characterised in that the EAF dust is pelletised prior to introduction into the fluidised bed reactor.
(FR)
L'invention concerne un procédé de traitement de la poussière de four à arc électrique. Dans ce procédé, on introduit la poussière de four à arc électrique préchauffée et décontaminée dans un réacteur à lit fluidisé où l'hématite est réduite au moyen d'un gaz de réduction chaud généré par le gaz naturel de conversion selon un processus non catalytique de chauffage au plasma, afin de produire un matériau riche en fer approprié au recyclage dans le four à arc électrique. L'invention est caractérisée en ce que la poussière de four à arc électrique est bouletée avant d'être introduite dans le réacteur à lit fluidisé.
Also published as
Latest bibliographic data on file with the International Bureau