Purification equipment for aluminum alloy smelting

Purification equipment for aluminum alloy smelting comprises a smelting furnace, a sealing boss is arranged at the upper end of the smelting furnace, a sealing end cover is installed on the sealing boss, a driving mechanism controls the sealing end cover to move in the vertical direction, an auxiliary sealing cover is arranged below the sealing end cover, and the outer wall of the auxiliary sealing cover is matched with the inner wall of the smelting furnace. The auxiliary sealing cover is connected with the sealing end cover through a second fixed upright post; the device further comprises a purification assembly arranged in the smelting furnace, the purification assembly comprises a rotating main shaft and a power assembly controlling the rotating main shaft to rotate, the upper end of the rotating main shaft penetrates through the auxiliary sealing cover, and an exhaust assembly is installed at the lower end of the rotating main shaft. The exhaust pipeline sequentially penetrates through the sealing end co