A method for producing ultrafine alpha-alumina

Abstract

The invention belongs to the technical field of aluminum oxide, and in particular to a method for manufacturing ultrafine alpha-alumina. Aiming at the problem that the existing material cost is high and easy to cause pollution, the following scheme is proposed, which comprises the following steps: S1: the raw materials of the ultrafine alpha-alumina comprise 25 to 30 parts of aluminum powder, 0.1 to 1 part of boride, 69 to 74 parts of purified expired fruit juice and 0.1 to 1 part of super acid, and the aluminum powder comprises aluminum oxide and aluminum hydroxide; S2: pouring the aluminum powder and the boride into a stirring device, heating them to 55 to 65° C., stirring at a stirring speed of 320 r / min to 460 r / min, preparing ultrafine alpha-alumina from the materials of aluminum powder, boride, purified expired fruit juice and super acid, and replacing the original chemical acidic substance with purified expired fruit juice, so that the expired fruit juice can be utilized, resource waste can be reduced, material procurement cost can be reduced, pollution to the environment can be reduced, and the environmental protection of the ultrafine alpha-alumina can be enhanced.

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