Medium Alumina Ceramic Ball: high hardness, big density, low wear lost, good normalizations, good corrosion-resistance etc.

 Medium Alumina Ceramic Ball:

1. High wear-resisting: The alumina balls’ wear resisting is higher than the common ceramic balls’. When it is working, the ball will not pollute the grinded materials, so it can keep the purity and improve the stability of grinded materials especially the ceramic glaze.

  2. High density: the high density, high hardness and the high grindingCharacters save the grinding time, enlarge the smashing room. SoIt can improve the grinding efficiency.  Index for alumina grinding balls: 

Product	Al2O3(%)	Density(g/cm3)	Water absorption(%)	Moh’s hardness(scale)	Abrasion loss(%)
70 series	68-70	≥2.9	≤0.02	8-8.5	≤0.01
80 series	85	≥3.4	≤0.02	9	≤0.01
92 series	92	≥3.5	≤0.005	9	≤0.011
95 series	95	≥3.6	≤0.005	9	≤0.0084

 The standard specification of alumina grinding balls 

Diameter(mm)

φ25

φ30

φ40

φ50

φ60

φ70

Medium Alumina Ceramic Ball