| 摘要 |
A rotary hammer mill for breaking stone, gravel and similar material to achieve a desired size reduction. The mill includes a plurality of hammerheads rotatably supported in a housing for rotation in a substantially horizontal plane to define a substantially horizontally disposed annular breaking zone. The hammerheads are rotatably driven at a breaking speed sufficient to cause the hammerheads to reduce material impacting against the hammerheads in the breaking zone. Material is introduced down into the breaking zone in an annular pattern so that the feed of material into the breaking zone is annularly distributed rather than concentrated at a single feed location. As a result, the proportion of the total material feed which is broken up initially upon entering the annular breaking zone is increased as compared to that of a hammer mill having a single feed location to promote uniform, rapid reduction of the material and thereby reduce the production of fines or excessively reduced material caused by retention of material in the mill.
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