Sf3 12 is the contract code of ferrosilicon futures, which stands for ferrosilicon. Ferrosilicon is an essential deoxidizer in steel-making industry and is used as deoxidizer and alloying agent in steel-making industry. In steelmaking industry, ferrosilicon is used for precipitation deoxidation and diffusion deoxidation. In chemical industry, ferrosilicon is used as industrial raw material of catalyst, silicon compound and viscose, and as inoculant and nodulizer in foundry industry.