High Density Alumina Ceramic Grinding Media Ball /
High density alumina ceramic ball mill grinding media ball: Al 2 O 3 Content 92%: SiO 2 7%: CaO + MgO+ Fe 2 O 3 +Others: 2%: Bulk Density /cm 3: Water Absorption %: Hardness: 9 Mohs: Self Wear Rate % (24h)