China Porcelain Ball Mill Jar - China 250 Ml Zirconia ...- ball mill jar porcelain l ,China Porcelain Ball Mill Jar, Find details about China 250 Ml Zirconia Milling Jar for Planetar, Yttrium Stabilized Zirconia Grinding Jar from Porcelain Ball Mill Jar - Shanghai Gongtao Ceramics Co., Ltd.Ball Mills - Bailey PotteryBall Mill is a grinding mill in which the material to be ground is tumbled in a drum with heavy balls of iron, steel, or stone.