| 摘要 |
<p>The invention relates to a mill comprising a grinding chamber (1) containing a rotor (2) provided with strikers (4), and at least one impact screen (5, 6) pivotably mounted using an adjustment cylinder (9, 10) for moving the bottom end of the screen toward or away from the rotor (2) so as to define, between the bottom end of the screen and the free end of the strikers (4), a spacing (R) that determines a given particle size. The mill comprises a rotor-positioning device including an indexing means that makes it possible to position the end of one of the strikers as close as possible to the screen (5) with a view to adjusting the spacing (R). The mill includes a gear motor (11) driving a pinion (12) capable of meshing with a toothed wheel (13) rotatably secured to the rotor (2) so as to rotatably drive the latter from a resting state until one of the strikers (4) is as close as possible to said screen.</p> |
