| 摘要 |
A comminuting apparatus which includes a housing containing a drum rotatable about a horizontal axis, a first crushing and screening grate pivotally suspended in the housing, and having a lower end adjustably movable toward the drum to form with the drum a selectively widenable throat, and a second arcuate fine grinding and screening grate pivotally mounted in the housing, and forming with the drum an adjustably dimensioned constricting throat. The drum carries at its outer periphery, a plurality of circumferentially spaced, axially extending rows of detachably mounted hammer elements. Each hammer element in each of the axial rows is received in an undercut, trapezoidally-shaped slot in an elongated hammer retainer bar. Each of the hammer bars is retained in its respective undercut slot by a plurality of wedge blocks.
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