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Size： 3，6, 8，9, 10,13,16,19,25,30,32,38,50,65,70,75,100
Chemical composition and physical properties
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Chemical composition |
Al2O3(%) |
92 |
95 |
99 |
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Fe2O3(%) |
≤0.4 |
≤0.3 |
≤0.1 |
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The remaining ingredients can be determined by negotiation between the supplier and the buyer as necessary. |
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Water absorptivity (%) |
3±1.Can also be negotiated
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Proportion（kg/m³） |
≥3.1 |
≥3.2 |
≥3.4 |
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Bulk density（kg/m³） |
1700-1950 |
1800-1950 |
≥1900 |
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Dust, cracking or breaking |
Single bag less than 5%
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Size deviation
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Uniform sphere, the ratio of the maximum and minimum diameter of a porcelain ball does not exceed 1.2
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Load softening（yb/t370-1995） |
Less than 0.6% deformation under 0.2 Mpa |
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Thermal shock resistance (yb/t376.2-1995） |
1200℃ reduced to 600℃, 10 times no cracks on the surface |
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Reheating heat change (gb/t3997.1-1998) |
1400℃ for 12 hours with a maximum of 0.25% and an average of less tahn 0.20% |
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Dimensional tolerance
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≤10mm |
±1.0 |
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11—25mm |
±1.5 |
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26—50mm |
±2.0 |
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≥50mm |
±3.0 |
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Free fall strength |
Lossless rate≥99％ |
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