The company casting production line equipped with modern casting required regenerative melting furnace, tilting holding furnace, furnace online in addition to gas system, plate / tube type ceramic filters, the same level hot top casting system and homogenization treatment furnace and other equipment; quality of ingot composition homogeneity of less than or equal to 3%, the hydrogen is less than or equal to 0.12ml/100g.Al, grain size is less than or equal to 150 m, foreign body of 3 m above removal levels equal to or more than 98 percent.