Ferroalloys: Various ferroalloy and calcium silicon based on high-quality steel required Deoxidants, according to the carbon content of alloying elements or the level of provision in many grades, and strictly limited to impurities. Containing two or more alloying elements silicon calcium alloy called a composite alloy compound deoxidizer, the use of such ferroalloy simultaneously deoxygenated or alloying elements, steel-making process beneficial calcium silicon compound deoxidizer price, and can be reasonably economical comprehensive utilization of associated mineral resources. The main method of ferroalloy production: vacuum resistance furnace. Production of low carbon micro-carbon ferrochrome nitride ferrochrome, ferromanganese and other products using vacuum resistance furnace calcium silicon compound deoxidizer plant, its main equipment for the vacuum resistance furnace. A vacuum decarburization furnace law in the solid state under vacuum conditions, the press-forming of smelting agglomerates charged into the furnace, depend on the current through the heating resistor when the hot electrode, while the vacuum pumping, the production is carried out intermittently.