I-silicon yesinyithi, ekwabizwa ngokuba yi-crystalline silicon okanye isilicon yeshishini, isetyenziswa ikakhulu njenge-additive to non-ferrous alloys.I-silicon yesinyithi yimveliso enyibilikisiwe kwi-quartz kunye ne-coke kwiziko lombane.Inxalenye ephambili ye-silicon umxholo malunga ne-98% (kwiminyaka yakutshanje, i-99.99% ye-Si content nayo ifakwe kwi-silicon yensimbi), kwaye ukungcola okuseleyo yintsimbi kunye ne-aluminium.icalcium, njl.