Duubitaanka cadaadiska sare ee hal-drive ayaa si gaar ah loogu talagalay in horay loo shiido clinkers-ka sibidhka, wasakhda macdanta, birta birta iyo wixii la mid ah, si loo burburiyo macdanaha macdanaha ah (macdanta birta, manganese, macdanta copper). , macdanta ledhka-zinc, macdan vanadium iyo kuwa kale) iyo in la shiido macdanta aan biraha ahayn (gangues dhuxusha, feldspar, nephe-line, dolomite, limestone, quartz, iwm) oo budo ah.