Ukujikelezisa imiphetho yesinyithi yinkqubo yokususa imiphetho ebukhali okanye erhabaxa kwiindawo zesinyithi ukuze kwenziwe umphezulu ogudileyo nokhuselekileyo. Ii-slag grinders ziimatshini ezihlala ixesha elide ezigaya iindawo zesinyithi njengoko zisetyenziswa, zisusa zonke ii-slag ezinzima ngokukhawuleza nangokufanelekileyo. Ezi matshini zisebenzisa uthotho lweebhanti zokugaya kunye neebhrashi ukuze zikrazule ngokulula nakwiingqokelela zenkunkuma enzima.
