Production process of micro-sodium alpha-aluminum oxide

The invention discloses a micro-sodium alpha-aluminum oxide production process, which belongs to the field of micro-sodium aluminum oxide production, and comprises the following steps: (1) preparing slurry; (2) adding a sodium removal agent to remove sodium from the slurry; (3) filtering the slurry subjected to sodium removal to obtain solid wet-based micro-sodium alumina; (4) calcining the solid wet-based micro-sodium alumina in a rotary kiln; (5) cooling in a membrane roller cooler after calcining; (6) after refrigerant heat exchange, hot water is conveyed to an MVR crystallization evaporator to be evaporated; (7) discharging salt from strong brine through a centrifugal machine; according to the micro-sodium alpha-aluminum oxide production process, distilled water can be recycled, valuable sodium salt can be recycled, in addition, micro-sodium alpha-aluminum oxide non-mineralization calcination is achieved, harmful substances such as sodium fluoride are not discharged into the atmosphere any more, dust coll