Ferrosilicon ni ubwoko bwa ferroalloy igizwe no kugabanya silika cyangwa umucanga hamwe na kokiya imbere yicyuma.Inkomoko isanzwe yicyuma ni ibyuma bisya cyangwa urusyo.Ferrosilicons irimo silikoni igera kuri 15% ikorwa mu itanura riturika rifite amatafari ya acide.