Production process of micro-sodium alpha-aluminum oxide

• Main Authors: YAN PINGXIN, WU QIANG, LIU SHIYOU, FAN YANMIN, ZHAO DUANXIA, ZHOU HAIJUAN, FENG YANLEI, PEI DONGQUAN, SU XIZHEN, WANG YONG, WEI WEIGUO, WU XIAOYU, HUO GUANGMING, YANG YUANDONG, LI JIA, DING LI, ZHOU YUNGANG, YU HUAFENG, HOU JIANJUN, CAO GUOCHU, PANG ERZHONG, LI YUFENG, XU XIUYUN
• Format: Patent
• Language: Chinese; English
• Published: 01.11.2022
• Subjects: CHEMISTRY; COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS; INORGANIC CHEMISTRY; METALLURGY

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