The main method of ferroalloy production: classification by heat source. Depending on the heat source is divided into carbon thermal method, heating method, silicon thermal power, metal calorimetry. Carbon calorimetry. Carbon heat smelting process is mainly thermal coke combustion heat industrial silicon silicon metal prices, the use of coke as a reducing agent Buying industrial silicon metal silicon oxide ore reduction, using production of this method is carried out continuously in a blast furnace . Ferroalloys: In simple terms, is the use of blast furnace blast 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, carbon is used as a reducing agent, and the reducing power of carbon is enhanced with increasing temperature, it is much more difficult to restore oxides such as CaO, Al2O3, rare earth oxides, etc. can restore them in reducing electric furnace.