Silikoni slag ndi chinthu chochokera ku chitsulo chosungunula silicon ndi ferrosilicon. Ndi mtundu wa dothi loyandama pa ng'anjo panthawi yosungunula silicon. Kuchuluka kwake ndi kuyambira 45% mpaka 70%, ndipo zina zonse ndi C,S,P,Al,Fe,Ca. Ndi yotsika mtengo kwambiri kuposa chitsulo choyera cha silicon. M'malo mogwiritsa ntchito ferrosilicon popanga zitsulo, ingachepetse mtengo.
