Ultrafine　nano-grinding　of　silicon–carbon　ores　combined　with　sodium　hexametaphosphate　(SHMP)　treatment　enhanced　silica　dispersion　and　effectively　separated　silica　and　carbon　particles.　The　hydrophobic　nature　of　carbon　promoted　its　re-agglomeration　and　sedimentation,　achieving　selective　carbon　enrichment.　Characterization　via　FTIR,　Raman　spectroscopy,　and　TEM　revealed　two　types　of　amorphous　carbon　with　distinct　structural　features.　BET　analysis　indicated　a　specific　surface　area　of　92　m2/g　for　the　carbon-rich　fraction,　suggesting　potential　applications　in　catalysis　and　energy　storage　after　further　activation.　©　2025　by　the　authors.