(19)
(11) EP 1 224 031 A1

(12)

(43) Date of publication:
24.07.2002 Bulletin 2002/30

(21) Application number: 00931305.7

(22) Date of filing: 06.06.2000
(51) International Patent Classification (IPC)7: B03D 1/00
// B03D103:02,(B03C1/00, C22B23:00)
(86) International application number:
PCT/FI0000/503
(87) International publication number:
WO 0074/856 (14.12.2000 Gazette 2000/50)
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 07.06.1999 FI 991294

(71) Applicant: Valtion Teknillinen Tutkimuskeskus
02044 VTT (FI)

(72) Inventors:
  • HÄNNINEN, Esko
    FIN-82500 Kitee (FI)
  • LEPPINEN, Jaakko
    FIN-83500 Outokumpu (FI)
  • HINTIKKA, Väinö
    FIN-83500 Outokumpu (FI)

(74) Representative: Heikkinen, Esko Juhani 
Berggren Oy AbP.O. Box 16
00101 Helsinki
00101 Helsinki (FI)

   


(54) METHOD FOR THE PREPARATION OF NICKEL CONCENTRATE