BALL MILL BALL CHARGE - Crusher Mills. Ball Charge Design Methods Ball Charge Design Methods Polysius for Finish Mills A formula that covers the entire mill as though it is a single Mill (grinding) – Wikipedia, the free encyclopedia Ball mills normally operate with an approximate ball charge.Ball Mill Application and Design. Ball mills are used the size reducing or milling of hard materials such as minerals, glass, advanced ceramics, metal oxides, solar cell and semiconductor materials, nutraceuticals and pharmaceuticals materials down to 1 micron or less. The residence time in ball mills is long enough that all particles get.