Molten aluminum transfer device of centralized melting furnace

The utility model belongs to the technical field of melting furnaces, and particularly relates to a molten aluminum transfer device and method for a centralized melting furnace, which comprises a ladle body, an upper cover, a connecting elbow and a riser tube, the ladle body comprises a ladle body shell, a first thermal insulation material layer and a high-temperature refractory material layer which are sequentially arranged from outside to inside; a heating resistance wire is arranged on the inner wall of the high-temperature refractory material layer; the upper cover comprises an upper cover shell; the upper cover shell is arranged at the top of the ladle shell, and a fourth thermal insulation material layer is arranged outside the outflow pipeline; the upper cover is provided with an opening, the riser tube is obliquely arranged, one end of the riser tube is provided with a horizontal flange, W-shaped grooves are formed in the front face and the back face of the flange, the back face of the flange is attac