Magnesium steam filtering device for producing primary magnesium ingot above Mg9995A

The utility model provides a magnesium steam filtering device for producing primary magnesium ingots above Mg9995A. The magnesium steam filtering device comprises a reduction tank, a medium filter base, a medium box, a magnesium crystallizer and a cooling water jacket, a medium is contained in the medium box, the medium box is arranged in the medium filter base, and the medium filter base is arranged in the reduction tank and is close to the tank opening end of the reduction tank; a plurality of holes are formed in the two opposite sides, in the axial direction of the reduction tank, of the medium filter base, and a plurality of holes are also formed in the two opposite sides, in the axial direction of the reduction tank, of the medium box; the air inlet end of the magnesium crystallizer is hermetically butted with the tank opening end of the reduction tank; a vacuum chamber is arranged outside the magnesium crystallizer, one end of the vacuum chamber is connected with the tank opening end of the reduction ta