Ekubunjweni konyango lwesinyithi somgangatho wenkqubo yefilimu ye-phosphate, iya kuvelisa inani elikhulu le-phosphate slag, njengokususwa kwangethuba kwezi zinqunyanyiswa kulwelo lwamasuntswana e-slag ecocekileyo, kuya kuchaphazela uzinzo kunye nokucoceka kolwelo lwetanki, ngokuthe ngqo. echaphazela izinga lokufaneleka kwemveliso.Ngoko ke, kuyimfuneko ukuqwalasela umatshini wokususa i-phosphating slag kumgca wokuvelisa.