Ferroalloys: grain prices simply ferrosilicon, blast furnace method is the use of blast furnace temperature and reducing atmosphere is made of the alloy ferroalloy ore reduction. In the blast furnace ferroalloys mainly carbon ferromanganese; the furnace with energy as a heat source, as a reducing agent with carbon ferrosilicon grain production plants, while reducing power of carbon is enhanced with increasing temperature Buying ferrosilicon grain, so much more difficult reducible oxides such as CaO, Al2O3, rare earth oxides, etc. can restore them in reducing electric furnace. Ferroalloy basic purposes: pure metal additives steelmaking aluminum, titanium, nickel and silicon metal, metal manganese, chromium and the like. Some easily reducible oxides such as MoO, NiO, also used in place of ferroalloys. In addition, the nitride alloys, such as nitrided ferrochrome, ferromanganese, etc., and mixed with heating agent heat iron alloy.