(19)

(11)

EP 1 802 782 A1

(12)

(43) Date of publication: 04.07.2007 Bulletin 2007/27 (21) Application number: 05805867.8 (22) Date of filing: 04.10.2005

(51) International Patent Classification (IPC):  C22C 21/02(2006.01) C22F 1/043(2006.01) (86) International application number: PCT/EP2005/010805 (87) International publication number: WO 2006/037647 (13.04.2006 Gazette 2006/15)

(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 LV MC NL PL PT RO SE SI SK TR (30) Priority: 05.10.2004 EP 04077718 (71) Applicant: Aleris Aluminum Koblenz GmbH 56070 Koblenz (DE)	(72) Inventors: MORITZ, Claus, Jürgen 56075 Koblenz (DE) VAN DE LANGKRUIS, Jörgen NL- 1058 AK Amsterdam (NL) (74) Representative: Müller, Frank Peter et al Müller Schupfner Patentanwälte Bavariaring 11 80336 München 80336 München (DE)