Silikoni slag inobuda kubva musimbi inonyungudutsa silicon neferrosilicon. Imhando yetsvina inoyangarara pachoto panguva yekunyungudutsa silicon. Zviri mukati mayo zvinobva pa45% kusvika 70%, uye zvimwe zvese zviri C,S,P,Al,Fe,Ca. Yakachipa zvikuru pane simbi yesilicon yakachena. Pane kushandisa ferrosilicon kugadzira simbi, inogona kuderedza mutengo.
