| 摘要 |
A rotary hammer grinding mill having the rotary hammer rotor exposed in a housing between a material inlet and a ground material outlet in which the grate assembly on the outlet side of the rotor is composed of a series of spaced cradle ribs curving around the outlet side of the rotor and supporting a series of spaced bars directed transversely to the cradle ribs. The cradle ribs and bar spacing defines a series of openings having short passages offering greatly reduced resistance to the flow of ground material so there is substantially established a down-draft operation of the mill without the need to connect up a suction fan to the mill outlet.
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