| 摘要 |
The present invention relates to a grinder body of the spherical type inscribed in a sphere (S) of radius R and including concave portions disposed in such a manner as to avoid altering the center of gravity of the sphere. In characteristic manner of the invention, the maximum depth (h) of the concave portions lies substantially in the range {fraction (1/12th to {fraction (1/18th of the radius R of said sphere (S). The present invention also provides a method of grinding that implements the grinder body of the invention, and a ball mill containing a grinding mass that includes grinder bodies of the invention.
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