(19)

(11)

EP 3 645 479 A1

(12)

(43) Date of publication: 06.05.2020 Bulletin 2020/19 (21) Application number: 18823504.8 (22) Date of filing: 23.05.2018

(51) International Patent Classification (IPC):  C04B 2/12(2006.01) F27B 1/00(2006.01) (86) International application number: PCT/SE2018/050520 (87) International publication number: WO 2019/004892 (03.01.2019 Gazette 2019/01)

(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: 26.06.2017 SE 1750819 (71) Applicant: Fältkalk AB 455 35 Munkedal (SE)	(72) Inventor: GABRIELSSON, Christoffer SE-455 34 Munkedal (SE) (74) Representative: Kransell & Wennborg KB  P.O. Box 2096 403 12 Göteborg 403 12 Göteborg (SE)