Method for purifying and reducing iron content in aluminum through segregation method

The invention relates to a method for reducing the iron content in aluminum through segregation purification, and belongs to the technical field of molten aluminum purification. In order to solve the problem that the existing molten aluminum purification and iron removal effect is poor, the method for reducing the iron content in aluminum through segregation purification is provided, and the method comprises the steps that a B-containing impurity removal agent is added into molten aluminum for stirring and refining; the refined molten aluminum is transferred into a preheated purification crucible furnace, the temperature is controlled to be 680-740 DEG C for purification, then cooling crystallization is conducted to enable the molten aluminum to be crystallized and solidified on the wall of the crucible furnace to form aluminum blocks, and the crucible furnace is subjected to protective coating treatment for preventing iron element from seeping out in advance; pouring out the residues after purification and c