(19)

(11)

EP 0 788 558 A1

(12)

(43) Date of publication: 13.08.1997 Bulletin 1997/33 (21) Application number: 95931106.0 (22) Date of filing: 19.09.1995

(51) International Patent Classification (IPC):  B01F 3/ 12( . ) B01F 7/ 22( . ) C22C 21/ 00( . ) B01F 7/ 16( . ) C22C 1/ 02( . ) B01F 7/ 00( . ) (86) International application number: PCT/CA1995/000525 (87) International publication number: WO 1996/009418 (28.03.1996 Gazette 1996/14)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI NL SE (30) Priority: 20.09.1994 CA 19942132485 (71) Applicant: TIMMINCO LIMITED Toronto Ontario M5W 1G5 (CA)	(72) Inventors: HIBBINS, Stephen, George Renfrew, Ontario K7V 3V8 (CA) TIMPANO, Fernando, Anthony Pembroke, Ontario K8A 1T8 (CA) ZULIANI, Douglas, John Stitsville, Ontario K2C 1E5 (CA) (74) Representative: Jehan, Robert, et al  Williams, Powell & Associates, 34 Tavistock Street London WC2E 7PB London WC2E 7PB (GB)