Drawbacks of the Casting ball process ：
1.Casting ball is made of pig iron, adding the amount of (13-28%) Chrome could be required the steel ball for ball mill.
2.Casting ball loose organization, coarse grains, poor wear resistance and impact toughness(3-7J/cm3), breakage rare exceed 3%
3.High energy consumption, heavily polluted and labor intensity high, low productivity
4.the cost of raw material and wages are high, especially below dia 50mm
