Ferrosilicon (FeSi) is a crucial ferroalloy composed of iron and 15–90% silicon, produced by reducing silica with coke in electric arc furnaces. Primarily used in steelmaking for deoxidation and alloying, it boosts strength, corrosion resistance, and heat resistance. It is also essential for producing cast iron, silicon steel, and magnesium.
Contains 15–90% Silicon (Si), with common commercial grades being 45%, 75%, and 90% Si.