Method for preparing high-purity calcium aluminate powder from bauxite

The invention relates to the technical field of bauxite treatment, and discloses a preparation method for preparing high-purity calcium aluminate powder by using bauxite, which comprises the following steps: S1, taking bauxite, sodium carbonate and quick lime according to the proportion; s2, uniformly mixing bauxite, sodium carbonate and quick lime, pouring the mixed raw materials into a mill to prepare raw material powder, putting the raw material powder into a rotary kiln for calcining, and generating primary clinker after calcining; s3, putting the primary clinker into a mill to prepare clinker powder, pouring the clinker powder into a dilute alkali solution, stirring, and separating by using a filter press after complete dissolution to obtain filter residues and a sodium aluminate solution; s4, CO2 is introduced into the sodium aluminate solution to generate primary aluminum hydroxide precipitate, primary aluminum hydroxide is separated out through a filter press, and mother liquor is recycled; and S5, ad