| 摘要 |
PROBLEM TO BE SOLVED: To provide a jet mill excellent in grinding efficiency. SOLUTION: A fluidized bed type jet mill including at least a grinding chamber 3 having a center axis (m), the collision member 7 arranged in the grinding chamber and having the center on the center axis (m) of the grinding chamber 3 nozzles 5 ejecting a high speed gas to the center axis (m) of the grinding chamber and, in the nozzle axis (n) and the vertical cross section (p) including the center axis (m) of the grinding chamber, the angleαformed by the nozzle axis (n) and the collision member 7 is set to 25-80 deg..
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