INDEX STANDARD
	Item Calcined Flint Clay Brand YNB-45 YNB-44 YNB-43 YNB-42 YNB-40 YNB-36 Al2O3 45-50 44-50 43-50 42-50 40-50 36-42 Fe2O3 ≤1.0 ≤1.2 ≤1.5 ≤2.0 ≤2.5 ≤3.5 Refractoriness ≥1770 ≥1750 ≥1750 ≥1730 ≥1710 ≥1670 Bulk Density g/cm3 ≥2.55 ≥2.50 ≥2.45 ≥2.40 ≥2.35 ≥2.30
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