(19)

(11)

EP 4 251 337 A1

(12)

(43) Date of publication: 04.10.2023 Bulletin 2023/40 (21) Application number: 21824667.6 (22) Date of filing: 25.11.2021

(51) International Patent Classification (IPC):  B07B 1/22(2006.01) B07B 13/16(2006.01) B07B 1/24(2006.01) (52) Cooperative Patent Classification (CPC): B07B 1/22; B07B 1/24; B07B 13/16 (86) International application number: PCT/IB2021/060980 (87) International publication number: WO 2022/112995 (02.06.2022 Gazette 2022/22)

(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: 27.11.2020 IT 202000028850 (71) Applicant: White Black Slag Technology S.R.L. 31100 Treviso (IT)	(72) Inventors: CARLESSO, Franco 31100 Treviso (IT) PIZZATO, Edoardo 31100 Treviso (IT) (74) Representative: Braidotti, Andrea et al Praxi Intellectual Property S.p.A. Via F. Baracca, 5/A 30173 Venezia 30173 Venezia (IT)