Ferroalloy basic purposes: basic classification. Ferroalloy variety, classification method is also more generally classified according to the following methods: Press ferroalloy main element classification, mainly silicon, manganese, chromium, vanadium, titanium, tungsten, molybdenum and other alloy. Classification according to the carbon content of the alloy, high-carbon, carbon Buying calcium aluminosilicate alloy, low-carbon, low carbon alloy prices calcium aluminosilicate, ultrafine carbon and other varieties. Ferroalloy production methods: heating method is the production of ferro-alloys (high-carbon alloy), the main method; silicon thermal power is reduced ore in an electric furnace, slag silicon oxide or silicon (such as ferrosilicon or silico-manganese intermediate products or SILICOCHROMIUM) calcium aluminum alloy, and lime do ferroalloy production of flux. Therefore, the carbon content of the product obtained is low; for the production of high melting point, low carbon alloy or pure metal alloy plant Henan calcium aluminosilicate, metal thermal method should be used, metal thermal reduction reaction with heat generated by chemical heating alloy and slag, and the reaction automatically.