Ferrosilicon is an alloy of iron and silicon. The silicon content in ferrosilicon can be between 15 and 90 weight percent. Ferrosilicon has a high proportion of iron silicides. (Silicides has silicon and more electropositive elements) Ferrosilicon is produced by reduction of silica or sand in the present of iron. It is used to help reduce metals from their oxides and to deoxidize steel and other ferrous alloys. Which helps prevents the loss of carbon known as blocking the heat. Ferrosilicon is used to manufacture silicon, corrosion, as well as high-temperature resistant ferrous silicon alloys and silicon steel. It can be found in some electrode coatings and used for inoculation of the of the iron to accelerate graphitization. It’s an additive to cast irons for controlling the initial content of silicon as well.