(19)

(11)

EP 2 281 165 A1

(12)

(43) Date of publication: 09.02.2011 Bulletin 2011/06 (21) Application number: 09757363.8 (22) Date of filing: 24.04.2009

(51) International Patent Classification (IPC):  F27D 1/12(2006.01) C21B 7/10(2006.01) (86) International application number: PCT/EP2009/054937 (87) International publication number: WO 2009/146980 (10.12.2009 Gazette 2009/50)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA RS (30) Priority: 06.06.2008 LU 91453 (71) Applicant: Paul Wurth S.A. 1122 Luxembourg (LU)	(72) Inventors: MAGGIOLI, Nicolas F-57100 Thionville (FR) MOUSEL, Nicolas L-3410 Dudelange (LU) PLEIMELDING, Claude L-8611 Platen (LU) (74) Representative: Office Freylinger  P.O. Box 48 8001 Strassen 8001 Strassen (LU)