(19)

(11)

EP 3 765 641 A1

(12)

(43) Date of publication: 20.01.2021 Bulletin 2021/03 (21) Application number: 19709512.8 (22) Date of filing: 13.03.2019

(51) International Patent Classification (IPC):  C21B 7/02(2006.01) C21C 5/46(2006.01) F27D 1/12(2006.01) F27D 1/00(2006.01) C21B 7/10(2006.01) F27B 1/24(2006.01) F27D 9/00(2006.01) F27B 3/24(2006.01) (86) International application number: PCT/EP2019/056289 (87) International publication number: WO 2019/175244 (19.09.2019 Gazette 2019/38)

(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 Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 15.03.2018 EP 18161897 (71) Applicant: Primetals Technologies Limited London W4 5YA (GB)	(72) Inventors: MCDONALD, Ian James Ormesby, Middlesbrough TS7 9AR (GB) SHARPE, Christopher Barwick, Stockton-on-tees TS17 0GZ (GB) (74) Representative: Metals@Linz  Primetals Technologies Austria GmbH Intellectual Property Upstream IP UP Turmstraße 44 4031 Linz 4031 Linz (AT)