Ferroalloy classification: Classification according to production method. There blast furnace ferroalloy, ferroalloy electric furnace, furnace extrajudicial (metal calorimetry) alloy, vacuum solid state reduction ferroalloy, converter ferroalloy, iron alloy electrolysis. Nitride products. Ferromanganese or ferrochrome powder with steel Deoxidants, under high temperature conditions produced by nitriding nitride products. The main varieties are ferromanganese, ferrochrome nitride, and the like. Ferroalloy production methods: extrajudicial furnace. After completion of the melting metal to be solidified Hubei steel Deoxidants, lift furnace tube, remove the slag and iron ingots, ingot cooling blasted good lighting, broken, finishing the finished product. The main advantage of the device outside the furnace method is simple, can not produce an electric furnace capable of producing hard carbon reduction element or a metal alloy.