Ferrosilicon is an alloy made primarily of iron and silicon, typically containing 15% to 90% silicon. It is produced by reducing silica (silicon dioxide) in a furnace with iron. This material is commonly used in the steel industry to improve the quality of steel by deoxidizing and adding silicon, which enhances its strength and resistance to corrosion. In addition to its use in steelmaking, ferrosilicon is also utilized in the production of silicon metal and in the manufacturing of various alloys. It plays a crucial role in the foundry industry, where it helps in the production of cast iron and other metal products.