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Alumina Ball  

Alumina balls are made by isostatic press and sintered at high temperature by micro fine Al2O3 powder. The small crystal size is free from air pockets and has better wear resistance. It is ideal media for larger ball mills.


1.More economic than zirconia ball;

2.Higher density than glass or agate ball;

3.Lower contamination than glass ball;

Chemical Composition:

  SiO2 MgO+CaO+Na2O AL2O3 Others
wt% 4.30% 3.20% 92.30% 0.20%

Typical properties:

Specific Gravity Bulk Density Hardness Vickers Creshing Strength Water Absorption Packaging
3.7kg/dm3 2.2Kg/L 1300 2000N ﹤0.01% 25Kg


Code NA2 NA3 NA4 NA6 NA8 NA10 NA12 NA15 NA20 NA25 NA30 NA40 NA50 NA60 NA70 NA80
Sizes(MM) 2 3 4 6 8 10 12 15 20 25 30 40 50 60 70 80

Industries Wear Rate Testing:

Mill type: vertical bead mill Volume ofcharmber; 360L Test Period: 3 months
Motor: 75Kw Tip Speed: 9.1m/s Sizes: 1.2 -1.4 mm
Shaft Speed: 500rpm Slurry: CaCO3