品种 | 规格 | SIO2(%) | 烧结点(%) | 含泥量(%) | 角形系数 | 集中率(%) | 灼感量 | 酸耗值(ml) |
铸造用硅砂(擦洗) | 20-40目 | ≥98.38 | ≥1700 | ≤0.2 | ≤1.35 | ≥90.0 | ≤0.3 | 2.0-3.5 |
30-50目 | ≥98.81 | ≥1700 | ≤0.2 | ≤1.30 | ≥90.0 | ≤0.3 | 2.0-3.5 | |
40-70目 | ≥98.89 | ≥1700 | ≤0.25 | ≤1.30 | ≥90.0 | ≤0.3 | 2.0-3.5 | |
50-100目 | ≥97.37 | ≥1700 | ≤0.3 | ≤1.28 | ≥90.0 | ≤0.3 | 2.0-3.5 | |
70-140目 | ≥96.55 | ≥1700 | ≤0.3 | ≤1.28 | ≥90.0 | ≤0.3 | 2.0-3.5 |
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