I-slag yentsimbi kunye nentsimbi inokwahlulwahlulwa ibe yi-blast furnace slag kunye ne-steelmaking slag. Kwelinye icala, le yokuqala iveliswa kukunyibilika nokuncipha kwe-iron ore kwi-blast furnace. Kwelinye icala, le yokugqibela yenziwa ngexesha lenkqubo yokwenza intsimbi ngokutshintsha ukwakheka kwentsimbi.
