BOPI 08 BR/2024 REPERTOIRE NUMERIQUE 12 said post-tension steel strands - having a diameter ranging from 5 mm to 20 mm, - having a tensile strength higher than 1700 MPa, said fibers being either steel fibers and being present in a dosage ranging from 10 kg/m3 to 75 kg/m3 or being macro-synthetic fibers and being present in a dosage ranging from 1,5 kg/m3 to 9,0 kg/m3, whereby the slab and the supports are fully connected, partially connected or fully disconnected. Fig. 1 (11) 21598 Consulter le mémoire (51) B02C 17/00 (2022.01); C22B 11/00 (2022.01); C22B 11/08 (2022.01); C22B 11/12 (2022.01); C22B 3/02 (2022.01) ; C22B 3/12 (2022.01) (21) 1202300139 - PCT/EP2021/069927 (22) 16/07/2021 (30) EP n° 20186290.1 du 16/07/2020 (54) Alkaline oxidation process and device for treating refractory sulfide ore, in particular refractory gold ore. (72) EKSTEEN, Jacobus Johannes (AU); DU PLESSIS, Chris (BE); LAMBERT, Hugues (BE) et RABIEH, Alireza (AU) (73) S.A. LHOIST RECHERCHE ET DEVELOPPEMENT, Rue Charles Dubois 28, 1342 OTTIGNIES LOUVAIN-LA-NEUVE (BE) (74) S.C.P. AKKUM AKKUM & Associates, No. 1777, Rue 6.261, Auditorium Jean Paul II, Quartier Mbankolo, B.P. 4966, YAOUNDE (CM). (57) Alkaline oxidation process for treating retractory sulfide ore or concentrate particles enriched in a metal to be recovered comprising stages in which refractory ore or concentrate particles are surfaceoxidized in an alkaline oxidation step in alkaline liquid phase with calcium hydroxide forming an alkaline slurry, which slurry is thereafter mechanically activated to remove passivating coatings from the surface oxidized refractory ore particles.
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