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(11)

EP 3 559 578 A1

(12)

(43) Date of publication: 30.10.2019 Bulletin 2019/44 (21) Application number: 17818592.2 (22) Date of filing: 22.12.2017

(51) International Patent Classification (IPC):  F27B 1/02(2006.01) F27B 1/20(2006.01) F27D 3/18(2006.01) F27B 1/16(2006.01) F27D 3/16(2006.01) C21C 5/46(2006.01) (86) International application number: PCT/EP2017/084517 (87) International publication number: WO 2018/115503 (28.06.2018 Gazette 2018/26)

(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 Designated Extension States: BA ME Designated Validation States: MA MD TN (30) Priority: 23.12.2016 EP 16206888 (71) Applicant: Sandvik Intellectual Property AB 811 81 Sandviken (SE)	(72) Inventors: ERIKSSON, Olle 811 40 Sandviken (SE) HÄLL, Henrik 811 35 Sandviken (SE) (74) Representative: Sandvik  Sandvik Intellectual Property AB 811 81 Sandviken 811 81 Sandviken (SE)