Super-roundness alumina microsphere and preparation method thereof

The invention discloses a super-roundness alumina microsphere and a preparation method thereof.The method comprises the steps that pseudo-boehmite, alumina powder, water and peptizing auxiliaries are heated and stirred to be uniform, and pseudo-boehmite turbid liquid is obtained; adding a peptizing agent into the pseudo-boehmite suspension and uniformly stirring to obtain an aluminum oxide suspension; adding a solution containing a gelling agent into the aluminum oxide suspension, uniformly mixing, dropwise adding a hot oil column for forming, collecting obtained aluminum oxide balls, and curing, washing, drying and roasting the aluminum oxide balls to obtain the aluminum oxide microspheres, according to the method, by adjusting the preparation process of the alumina slurry and improving the hot oil column forming process, the physical characteristics of the obtained alumina microspheres can be effectively controlled, the overall pelletizing rate is high, and conditions are provided for realizing batch indust