Special-shaped ore grinding medium

The invention relates to a novel ore grinding medium. A special-shaped ore grinding medium uses a spherical ore grinding medium as foundation; three spherical gaps with the same section circles are cut in the surface of the special-shaped ore grinding medium at intervals; values of diameters D of the section circles are between zero and a sphere radius R, that is, D is bigger than 0 and not bigger than R; and values of distances L from the circle centers of the section circles to the sphere center are FORMULA. The ore grinding medium is combined with advantages of the spherical medium, embodies better rotating performance of the spherical medium in the ore grinding process, adopts the point contact crushing, and is strong in crushing force; planes formed by cutting the surface of the medium are in surface contact with ores in the ore grinding process, so that excessive crushing can be relieved; and the ore grinding medium surface has the point contact crushing and the surface contact crushing. As the spherical surface of the surface of the medium has the stress concentration, the ore grinding medium is obvious in coarse ore crushing effect in the ore grinding process; and the plane of the medium surface can selectively grind coarse ores to protect fine ores so as to achieve the purposes of relieving excessive ore grinding and improving the ore grinding product quality.