I-single-drive high high-high-high rolling roll yenzelwe ngokukhethekileyo ukucola iintsimbi zesamente kwangaphambili, inkunkuma yezimbiwa, iintsimbi ezikrwada njalo njalo zibe ziigranule ezincinci, ukutyumza iiminerali zesinyithi (ore iron, ores manganese, copper ores). , i-lead-zinc ores, i-vanadium ores kunye nezinye) kunye nokusila iiminerali ezingezizo ezentsimbi (i-coal gangues, i-feldspar, i-nephe-line, i-dolomite, i-limestone, i-quartz, njl.njl.) ibe ngumgubo.