I-single-drive high-high pressure rolling roll iklanyelwe ngokukhethekile ukugaya ngaphambili izinsimbi zikasimende, imfucumfucu yamaminerali, izinsimbi zensimbi njalo njalo zibe yizinhlamvana ezincane, ukuchoboza amaminerali ensimbi (insimbi, i-manganese ores, insimbi yethusi). , i-lead-zinc ore, i-vanadium ores nezinye) kanye nokugaya amaminerali angeyona insimbi (amalahle gangues, i-feldspar, i-nepheline, i-dolomite, i-limestone, i-quartz, njll.) ibe yimpushana.