(19)

(11)

EP 2 794 931 A1

(12)

(43) Date of publication: 29.10.2014 Bulletin 2014/44 (21) Application number: 12810104.5 (22) Date of filing: 19.12.2012

(51) International Patent Classification (IPC):  C21B 13/00(2006.01) C21C 5/56(2006.01) C21B 13/14(2006.01) F27D 99/00(2010.01) (86) International application number: PCT/EP2012/005258 (87) International publication number: WO 2013/091847 (27.06.2013 Gazette 2013/26)

(84) Designated Contracting States: AL 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 RS SE SI SK SM TR (30) Priority: 19.12.2011 EP 11009940 (71) Applicant: Tata Steel Nederland Technology B.V. 1970 CA IJmuiden (NL)	(72) Inventors: MEIJER, Hendrikus, Koenraad, Albertus NL-1970 CA IJmuiden (NL) ZEILSTRA, Christiaan NL-1970 CA IJmuiden (NL) (74) Representative: Blauw, Frans Gerard  Tata Steel Nederland Technology BV Group Intellectual Property Services - 3G.37 P.O. Box 10000 1970 CA IJmuiden 1970 CA IJmuiden (NL)