EP 1029093 A1 20000823 - METHOD FOR REPROCESSING STEEL SLAGS AND FERRIFEROUS MATERIALS
Title (en)
METHOD FOR REPROCESSING STEEL SLAGS AND FERRIFEROUS MATERIALS
Title (de)
VERFAHREN ZUM AUFARBEITEN VON STAHLSCHLACKEN UND EISENTRÄGERN
Title (fr)
PROCEDE POUR RETRAITER DES LAITIERS D'ACIER ET DES MATERIAUX FERRIFERES
Publication
Application
Priority
- AT 9900224 W 19990914
- AT 155698 A 19980915
Abstract (en)
[origin: WO0015855A1] The invention relates to a method for reprocessing steel slags and ferriferous materials, e.g. electric furnace slags, converter slags, fine ores, dusts from steel manufacturing, millscale for obtaining pig iron and environmentally safe slags, wherein a molten slag and an iron bath are used at a volume ratio ranging between 0.5:1 and 1.5:1, wherein carboniferous material is introduced in the bath and hot air is blown. A mixed slag is obtained from the initial slags and the ferriferous materials having alkalinity CaO/SiO2 ranging between 1.2 and 2.5 and placed in a hearth type furnace or a ladle, wherein hot air for post-combustion of CO formed from the carbon in the bath is blown with a post-combustion degree of PC = (a) (CO2 + H2O)/(CO + CO2 + H2 + H2O) between 0.70 and 0.85. The hot exhaust gases of the furnace or the ladle are evacuated tangentially to the axis of the mouth of the hot air feeding lance.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
C21B 3/06 (2013.01 - EP US); C22B 7/04 (2013.01 - EP US); C21B 2400/022 (2018.07 - EP US); Y02P 10/20 (2015.11 - EP US); Y02W 30/50 (2015.05 - EP US)
Citation (search report)
See references of WO 0015855A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0015855 A1 20000323; AT 407051 B 20001227; AT A155698 A 20000415; AU 5720199 A 20000403; CA 2310044 A1 20000323; EP 1029093 A1 20000823; ES 2151473 T1 20010101; US 6364929 B1 20020402; ZA 200002582 B 20001121
DOCDB simple family (application)
AT 9900224 W 19990914; AT 155698 A 19980915; AU 5720199 A 19990914; CA 2310044 A 19990914; EP 99944155 A 19990914; ES 99944155 T 19990914; US 55443200 A 20000515; ZA 200002582 A 20000524