Purification method of high-purity aluminum

The invention provides a purification method of high-purity aluminum, and belongs to the technical field of purification of metal aluminum. The purification method comprises the following steps that heating is performed outside a crucible to melt an aluminum raw material into molten aluminum liquid; a cooling pipe is immersed in the molten aluminum liquid, a cooling medium is introduced into the cooling pipe, high-purity aluminum is separated out on the surface of the cooling pipe, and a separated-out layer is obtained; when the thickness of the separated-out layer in the radial direction of the cooling pipe reaches a first preset thickness, a separation piece is adopted to rotate around the axis of the cooling pipe so as to stir the molten aluminum liquid; and when the thickness of the separated-out layer in the radial direction of the cooling pipe reaches a second preset thickness, the cooling pipe is taken out. The purification rate can be effectively increased. 本申请提供一种高纯铝的纯化方法，属于金属铝的提纯技术领域。纯化方法包括：在坩埚外加热使铝