With the increasing proportion of pellet ore used in blast furnacesBlast furnace, more and more fine oreFine ore which was used to be sintered is finely ground and used to prepare pellets. These fine oresFine ore are mostly composed of hematite and limonite, with significant differences in filtration performance. To study the filtration performance of different powder ores, experiments were conducted on 10 types of ores to investigate the relationship between chemical compositionChemical composition, mineral compositionMineral composition, surfaceSurface morphologySurface morphology, grinding difficulty and filtration performance. The experimental results show that ores with high loss on ignition, high content of limonite, rough surfaceSurface, and easier grinding had poorer filtration performance. By adjusting the filtration slurry concentration, filtration vacuum degree, filtration time, grinding particleParticle size, and adding filter aids, it was possible to effectively reduce the filtration moisture of finely ground ore.