| 摘要 |
<p>A device (1) for introducing or feeding a material into a mill having a vertical axis (4), such as an entry or feed cone coaxial with the mill and having a material guide surface, comprises at least one surface of revolution (5) generated by rotation of a concave line segment (6) about the mill centre line (4) in a plane passing through the mill centre line (4), the distance of the lower end (7) of this segment (6) from said centre line (4) being greater than that at its upper end (8) which may be » 0.</p> |
