Typical Characteristics
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Specification
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65Alumina Ball
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75Alumina Ball
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90Alumina Ball
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92Alumina Ball
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95Alumina Ball
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99Alumina Ball
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Al2O3(%)
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≥65
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≥75
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≥90
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≥92
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≥95
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≥99
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Fe2O3(%)
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≤0.5
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≤0.5
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≤0.1
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≤0.1
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≤0.1
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≤0.1
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Moh's Hardness
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8
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8~9
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9
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9
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9
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9
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Water Adsorption (%)
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≤0.05
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≤0.05
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≤0.02
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≤0.02
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≤0.02
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≤0.01
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Density (g/cm3)
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≥2.95
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≥3.25
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≥3.55
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≥3.60
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≥3.65
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≥3.8
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Crush Strength (MPa)
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≥1650
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≥1700
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≥1900
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≥2000
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≥2250
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≥2500
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Abrasion Loss (%)
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≤0.03
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≤0.02
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≤0.01
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≤0.01
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≤0.01
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≤0.01
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Appearance Demand
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High Alumina Grinding Balls
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Medium Alumina Grinding Balls
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Carbonized Alumina Grinding Balls
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Color
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White
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White
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Ash-black
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Crack
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Not Permission
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Not Permission
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Not Permission
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Impurity
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Not Permission
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Not Permission
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Not Permission
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Foam hole
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Above ф1mm not permission, size in ф0.5mm permit 3 balls
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Flaw
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Max. size in ф0.3mm permit 3 balls
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