Single-Drive High Drock Schleifen Rulle ass speziell entwéckelt fir d'Zementklerbecher ze schummen, de Mineral Dross, d'Stolklässer an sou weider a kleng Granthus, an engem metallesche Minerber an der Uelzechthaller, op den Ultrasträg an der Uelzechthrüller déi Metaller an den Ugräifer ass an den Eisenräg, Manga- Nese. , lead-zinc ores, vanadium ores and others) and to grind the non-metallic minerals (the coal gangues, feldspar, nephe- line, dolomite, limestone, quartz, etc.) into powder.