| 摘要 |
A granulated slurry, e.g. of CaCO3, is calcined in at least two temperature stages (30, 31, 32) in a fluidized bed installation (9) with directed movement through the stages. The temperatures in the respective steps (30, 31, 32) can be individually controlled to ensure that the temperature in the hottest stage (32) corresponds to a predetermined degree of decomposition of calcium carbonate. Typically the hottest stage is at a temperature of at least 880 DEG C, whilst the temperature of the other stage or stages is lower. <IMAGE> |
