抄録
The authors discuss in the present paper on the following facts.
(1) The passing phase of size distribution has been investigated concerning the impact crushing and the static compressive crushing. In the region of grinding limit, the behavior of size distribution is discussed.
(2) The remarkable tendency of specific surface increase is recognized between the impact crushing and the static compressive crushing.
(3) The aparent difference is recognized between the specific surface increase measured by means of size distribution method and that measured by means of air permeability method.
(4) We obtained Eq. (10) from the specific surface increase by those two methods of measurement.
