(19)

(11)

EP 1 740 730 A1

(12)

(43) Date of publication: 10.01.2007 Bulletin 2007/02 (21) Application number: 05735875.6 (22) Date of filing: 25.04.2005

(51) International Patent Classification (IPC):  C22B 3/10(2006.01) C22B 11/00(2006.01) (86) International application number: PCT/FI2005/000194 (87) International publication number: WO 2005/106052 (10.11.2005 Gazette 2005/45)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR (30) Priority: 30.04.2004 FI 20040621 (71) Applicant: Outokumpu Technology Oyj 02200 Espoo (FI)	(72) Inventors: HÄMÄLÄINEN, Matti FI-28100 Pori (FI) HYVÄRINEN, Olli FI-28220 Pori (FI) (74) Representative: KEIL & SCHAAFHAUSEN Patentanwälte  Cronstettenstrasse 66 D-60322 Frankfurt am Main D-60322 Frankfurt am Main (DE)