| 摘要 |
<p>Provided is a method for producing alumina capable of preventing the generation of reagglomerated particles and the contamination by impurities, and providing high purity alumina containing less agglomerated particles and occurring little foreign matters mixing. The present invention comprises a calcining step (S 11) of calcining aluminium hydroxide, which is produced by hydrolyzing aluminium alkoxide, and whose cumulative pure volume (pore radius within a range of 0.01 µm or more and 1 µm or less) is 0.6 mL/g or more, measured by means of the mercury intrusion porosimetry to generate an alumina calcined body; and a crushing step (S12) of crushing the alumina calcined body, by means of an airflow crusher, with a speed at which the alumina calcined body passes through a crushing chamber of the airflow crusher as 500 m/s or more.</p> |
