Alumina Ceramic Grinding Balls: 30. 40, 50. 60 mm: Si02 + Al2O3 (90%, 92%, 95%) + Others: NIL: : 9 MOHS: NIL: High Density Steatite Ceramic Lining Blocks Tiles: For All Types Attention Ball Mill: SiO2 + Al2O3 (10%) + Others: NIL: : MOHS: NIL: High Toughened Alumina Ceramic Lining Blocks Tiles: For All Types Attritor Ball Mills ...