EP 2082070 A1 20090729 - RECOVERY OF NON-FERROUS METALS FROM BY-PRODUCTS OF THE ZINC AND LEAD INDUSTRY USING ELECTRIC SMELTING WITH SUBMERGED PLASMA
Title (en)
RECOVERY OF NON-FERROUS METALS FROM BY-PRODUCTS OF THE ZINC AND LEAD INDUSTRY USING ELECTRIC SMELTING WITH SUBMERGED PLASMA
Title (de)
GEWINNUNG VON NICHTEISENMETALLEN AUS NEBENPRODUKTEN DER ZINK- UND BLEIINDUSTRIE UNTER VERWENDUNG VON ELEKTRISCHEM SCHMELZEN MIT TAUCHPLASMA
Title (fr)
RÉCUPÉRATION DE MÉTAUX NON FERREUX À PARTIR DE SOUS-PRODUITS DE L'INDUSTRIE DE PRODUCTION DU ZINC ET DU PLOMB UTILISANT LA FUSION ÉLECTRIQUE AVEC PLASMA IMMERGÉ
Publication
Application
Priority
- EP 2007009023 W 20071018
- EP 06022807 A 20061102
- US 85682106 P 20061106
- EP 07819091 A 20071018
Abstract (en)
[origin: WO2008052661A1] This invention relates to a single-step pyrometallurgical process for the recovery of non-ferrous metals from zinc bearing residues, in particular from by-products of the zinc and lead industry such as goethite and jarosite. A process for the recovery of metals from industrial Zn residues containing Zn, Fe and S is defined, wherein Zn is fumed, Fe is slagged, and S is oxidized to SO<SUB>2</SUB>, characterized in that the Zn fuming, the Fe slagging, and the S oxidation are performed in a single step process, by smelting the residues in a furnace comprising at least one submerged plasma torch generating an oxidizing gas mixture, and by feeding a solid reducing agent to the melt. The process achieves the oxidation of S and the slagging of Fe, while simultaneously achieving the reduction and the fuming of metals such as Zn.
IPC 8 full level
C22B 19/28 (2006.01); C22B 4/08 (2006.01); C22B 5/16 (2006.01); C22B 9/22 (2006.01); C22B 15/00 (2006.01)
CPC (source: EP)
C22B 4/005 (2013.01); C22B 5/16 (2013.01); C22B 7/001 (2013.01); C22B 9/226 (2013.01); C22B 19/28 (2013.01); Y02P 10/20 (2015.11)
Citation (search report)
See references of WO 2008052661A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2008052661 A1 20080508; AU 2007315330 A1 20080508; AU 2007315330 B2 20120927; CA 2668506 A1 20080508; CA 2668506 C 20130528; EP 2082070 A1 20090729; JP 2010508440 A 20100318; JP 5183638 B2 20130417
DOCDB simple family (application)
EP 2007009023 W 20071018; AU 2007315330 A 20071018; CA 2668506 A 20071018; EP 07819091 A 20071018; JP 2009535006 A 20071018