| 摘要 |
<p>A roller crushing-mill has a grinding plate rotatable about its vertical axis, a number of crushing rollers or pairs of crushing rollers disposed at uniform peripheral distances on the crushing plate and rotating about generally horizontal axes, an air supply conduit disposed below the plane of the crushing plate. A device is provided above the grinding plate for sifting the air charged with crushed material, and comprises a number of sifters corresponding to the individual crushing rollers or pairs of crushing rollers and disposed adjacent each other in like peripheral spacing, Air nozzles for providing substantially upwardly directed air streams are provided on the perimeter of the grinding plate in the area of the individual crushing rollers or pairs of crushing rollers, while in the areas between the individual crushing rollers or pairs of crushing rollers there are provided air nozzles for throttled air streams directed towards the crushing track.</p> |
