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EP 4 562 197 A1

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(43) Date of publication: 04.06.2025 Bulletin 2025/23 (21) Application number: 22754934.2 (22) Date of filing: 29.07.2022

(51) International Patent Classification (IPC):  C21B 11/10(2006.01) C21B 13/14(2006.01) C21C 7/00(2006.01) F27B 3/18(2006.01) C21B 13/00(2006.01) C21C 5/46(2006.01) C21C 7/064(2006.01) F27D 3/18(2006.01) (52) Cooperative Patent Classification (CPC): C21B 11/10; C21B 13/0073; C21B 13/14; C21C 5/4613; C21C 5/4653; C21C 5/4606; C21C 7/0068; C21C 7/064; C21C 7/0645; C21C 7/0025; C21C 7/0037; F27B 3/18; F27D 3/18; F27D 2003/185 (86) International application number: PCT/IB2022/057043 (87) International publication number: WO 2024/023565 (01.02.2024 Gazette 2024/05)

(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 (71) Applicant: ArcelorMittal 1160 Luxembourg (LU)	(72) Inventors: HUBER, Jean-Christophe 57640 Vry (FR) SANCHEZ, Mathieu 57050 Plappeville (FR) DEPLECHIN, Simon Pierre 7700 Mouscron (BE) (74) Representative: Plaisant, Sophie Marie  ArcelorMittal France Research & Development Intellectual Property 6, rue André Campra 93200 Saint-Denis 93200 Saint-Denis (FR)