Metallurgical flux material refers to the material which can separate metal from mineral by forming a low melting point slag layer while interacting with the rocks and harmful impurities in the orehe. According to the properties of flux, it can be divided into alkaline flux (such as limestone, dolomite, etc.), acid flux (such as quartz, metal ore with high silicone element, etc.), Neutral flux (bauxite, bauxite, etc.) and flux (such as fluorite, cryolite, etc.). It is generally required to have highly effective components, low harmful impurities. And ore strength and block degree should meet the requirements of the smelting process. Flux has the stable chemical composition, good selectivity, quick reaction, safe use, low corrosion and low price.