· Ferrosilicon is a ferroalloy, an alloy of iron and silicon. It is usually produced in submerged arc furnaces by reduction of silica or quartz sand (SiO2) with coke in presence of iron and usually contains around 75% silicon. Its appliions include deoxidizing steel and other ferrous alloys, making it a socalled master alloy in steel production. In terms of enduse, ferrosilicon is mainly ...