Molten aluminum refining method

The invention belongs to the technical field of metal refining methods, and discloses a molten aluminum refining method. The molten aluminum refining method comprises the following steps: (S1) charging: a charging port is formed in the external of a smelting furnace for charging; (S2) melting and feeding: solid aluminum raw materials are conveyed to the smelting furnace by a pipe after being molten in the charging port; (S3) heating by the smelting furnace: the smelting furnace is heated for further heating molten aluminum inside; (S4) refining by the smelting furnace: air bricks are mounted under the smelting furnace for introducing refining gas to the bottom of the smelting furnace; and (S5) after refining by the smelting furnace, 20-90% of the molten aluminum in parts by mass in the smelting furnace is poured in an insulation furnace to switch to next procedures. Compared with the prior art, the molten aluminum refining method achieves the following technical effects: 1) the continuous refining is realized