The main element is generally a higher melting point alloy steelmaking slag agent, or its oxide is difficult to restore, it is difficult refining pure metal steelmaking slag agent production plant, if it is easier to restore together with iron smelting. Used in the iron and steel smelting alloy steel slag preparation plant, where iron not only harmless, but because the anti-fusible in the molten steel is more favorable. Therefore, the process of steelmaking deoxidation and alloying of steel slag agent prices, mostly added in the form of ferro-alloys. Ferroalloy generally very brittle and can not be used as a metallic material. The main method of ferroalloy production: classification by operating methods and processes. Continuous smelting. Continuous smelting method, based on the case mouth dropped material surface, continuously feeding the furnace, and the furnace bath and slag build-up of alloy periodically removed. Using submerged arc smelting reduction, operating power is almost balanced and stable.