| 摘要 |
<p>A process for producing anhydrous aluminium oxide from aluminium hydroxide in a circulating fluidised bed is disclosed. The process is carried out in such a way, that the temperature in the circulating fluidised bed is set in the range from 850 to 1000 °C, the aluminium oxide removed from the circulating fluidised bed is mixed for at least two minutes with 10 to 25 % by weight of the partially dewatered aluminium hydroxide yielded by the solid-side first stage of the suspension pre-heater (2), the mixed material is then cooled in a multistage suspension cooler (15), (16), (17), (18), (19), (20), heating secondary gas (11), and then in the fluidised bed cooler (23), indirectly heating fluidisation gas (10).</p> |
