EP 0621905 A1 19941102 - PROCESS AND PLANT FOR THE REDUCTION OF HEXAVALENT CHROMIUM CONTAINED IN THE RESIDUE RESULTING FROM THE PROCESSING OF CHROMIUM MINERALS.
Title (en)
PROCESS AND PLANT FOR THE REDUCTION OF HEXAVALENT CHROMIUM CONTAINED IN THE RESIDUE RESULTING FROM THE PROCESSING OF CHROMIUM MINERALS.
Title (de)
Verfahren undAnlage zur Reduktion von im, in die Chrommineralien Bearbeitung gewonnener Rückstand enthaltende restwertige Chrom.
Title (fr)
PROCEDE ET INSTALLATION DE REDUCTION DU CHROME HEXAVALENT COMPRIS DANS LE RESIDU PRODUIT PAR LE TRAITEMENT DES MINERAIS CHROMIFERES.
Publication
Application
Priority
- EP 9203007 W 19921229
- IT MI920092 A 19920121
Abstract (en)
[origin: WO9314232A1] The present invention concerns a new process and the relative plant for reducing hexavalent chromium contained in the resultant earth after the production of chromium, in order to obtain the transformation from water-soluble compounds into insoluble compounds, the process comprising the phases of mixing the said residual products with one or more reducing agents and of indirectly heating the said mixture substantially without the presence of oxygen.
Abstract (fr)
Nouveau procédé et installation associée de réduction du chrome hexavalent compris dans les terres restant après la production de chrome, de manière à réaliser la transformation des composés hydrosolubles en composés insolubles. Le procédé comporte les phases consistant à mélanger les produits résiduaires à un ou plusieurs agents de réduction, et à chauffer le mélange indirectement et sensiblement en l'absence d'oxygène.
IPC 1-7
IPC 8 full level
C01G 37/00 (2006.01); C22B 5/08 (2006.01); C22B 34/32 (2006.01)
CPC (source: EP)
C22B 5/08 (2013.01); C22B 34/32 (2013.01); Y02P 10/20 (2015.11)
Designated contracting state (EPC)
DE GB IT
DOCDB simple family (publication)
WO 9314232 A1 19930722; AU 3347593 A 19930803; BR 9207057 A 19951205; CN 1074948 A 19930804; CZ 170394 A3 19950816; EP 0621905 A1 19941102; IT 1262918 B 19960722; IT MI920092 A0 19920121; IT MI920092 A1 19930721; MX 9300307 A 19931201; PL 171592 B1 19970530; RO 110458 B1 19960130; RU 2096511 C1 19971120; RU 94044672 A 19960827; SK 84194 A3 19950809; TR 26598 A 19950315; ZA 9343 B 19930805
DOCDB simple family (application)
EP 9203007 W 19921229; AU 3347593 A 19921229; BR 9207057 A 19921229; CN 93100815 A 19930120; CZ 170394 A 19921229; EP 93902135 A 19921229; IT MI920092 A 19920121; MX 9300307 A 19930121; PL 30430192 A 19921229; RO 9401227 A 19921229; RU 94044672 A 19921229; SK 84194 A 19921229; TR 1893 A 19930118; ZA 9343 A 19930105