| 摘要 |
<p>An improved vertical grinding mill is proposed which comprises a shell, a vertical screw shaft rotatably mounted in the shell, a collector, a drive for the screw shaft, and a fan or a pump. The screw shaft is hollow and its lower end is open at bottom of the shell. This assures a uniform distribution of the material to be treated, the grinding medium and the product particles and thus high production efficiency.</p> |
