| 摘要 |
PURPOSE: To provide a pulverizing impact plate made of a material having high pulverizing capacity per one impact. CONSTITUTION: A jet inlet 1 for high pressure gas output from a compressor is connected to an accelerating pipe 2. To the upper wall of the accelerating pipe 2, a hopper 3 for feeding powder to be pulverized is connected, and a jet outlet 4 of the accelerating pipe 2 is connected to a pulverizing chamber 5. When, an impact plate 6 satisfying the formula, Vickers hardness (kg/mm<2> )×0.8 + elastic modulus (kg/mm<2> )×0.02 > 1,800, is housed in the pulverizing chamber 5, pulverizing capacity per one impact is improved, and even if pulverizing through is increased, the material to be pulverized is pulverized so that a material accumulation in the hopper 3 may not be increased.
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