| 摘要 |
<p>A method for the classification of solid particles, in particular powdery catalytic components for the polymerisation of olefins, comprises sending solid particles suspended in a transporting gas flow (1) through a screening means (2). Immediately upstream to the screening means (2), there is an auxiliary fluidised bed classifier, in which the top of the bed (13) is at the level of the lower part of the grid (2).</p> |
