(19)

(11)

EP 2 300 562 A1

(12)

(43) Date of publication: 30.03.2011 Bulletin 2011/13 (21) Application number: 09757534.4 (22) Date of filing: 02.06.2009

(51) International Patent Classification (IPC):  C10B 57/10(2006.01) F26B 21/10(2006.01) B02C 23/34(2006.01) C21B 5/00(2006.01) (86) International application number: PCT/EP2009/056763 (87) International publication number: WO 2009/147153 (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: 02.06.2008 LU 91451 (71) Applicant: Paul Wurth S.A. 1122 Luxembourg (LU)	(72) Inventors: SCHMIT, Louis L-1456 Luxembourg (LU) STAMATAKIS, Georges L-5411 Canach (LU) JUNK, Guy L-9016 Ettelbruck (LU) (74) Representative: Office Freylinger  P.O. Box 48 8001 Strassen 8001 Strassen (LU)