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EP 3 956 482 A1

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(43) Date of publication: 23.02.2022 Bulletin 2022/08 (21) Application number: 19726148.0 (22) Date of filing: 15.04.2019

(51) International Patent Classification (IPC):  C21C 5/38(2006.01) F27D 21/02(2006.01) F27D 21/00(2006.01) C21C 5/40(2006.01) F27D 19/00(2006.01) G05B 15/00(2006.01) (52) Cooperative Patent Classification (CPC): Y02P 10/122; F27D 2019/0031; C21C 5/4673; C21C 5/52; C21C 5/40; F27D 2021/0007; F27D 2019/0006; C21C 2300/06; F27D 21/02; C21C 2005/5288; C21C 5/38; F27D 2019/0084; Y02P 10/25; Y02P 10/20; F27D 2019/0068 (86) International application number: PCT/IB2019/053079 (87) International publication number: WO 2020/212727 (22.10.2020 Gazette 2020/43)

(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: MAES, Grégory 59630 Brouckerque (FR) QUENTON, Jean-François 59279 Loon Plage (FR) PIOT, Jean-Baptiste 59240 Dunkerque (FR) VERGNIEZ, Gabriel 62380 Bouvelinghem (FR) (74) Representative: Plaisant, Sophie Marie  ArcelorMittal France Research & Development Intellectual Property 6, rue André Campra Immeuble Le Cézanne 93200 Saint-Denis 93200 Saint-Denis (FR)