
稀土瓷砂
| 成 分 | 含 量% | 
| composition | Content | 
| Al2O3 | 18-25 | 
| SiO2 | 68-75 | 
| Fe2O3 | ≤1.0 | 
| MgO | ≤0.7 | 
| CaO | ≤0.5 | 
| K2O+Na2O | ≤4 | 
| 稀土元素rare elements | 微量Micro compontent | 
| 項 目 | 指 標(biāo) | 備 注 | 
| 粒度mm | 0.5-3.0 | |
| 松裝容量 g/ml | 1.1-1.5 | |
| 空隙率 % | 40-45 | |
| 磨耗率 % | ≤0.5 | |
| 抗壓強(qiáng)度 N | 30-150 | |
| 透水率 t/m2 h | 2-4 | |
| 透氣率 m2/m3,h | 1500-2000 | |
| 耐溫度0C | ≥10000C | |
| 耐酸度% | 99.55% | 浸泡于30% HCL、50% H2SO4水溶液中14天 | 
| Mixed in 30%HCL+50% H2SO4 solution for 14 days | ||
| 耐堿度 % | 82.50% | 浸泡于10%NaOH、10%KOH堿液中14天 | 
| Mixed in 10%NaOH+10%KOH solution for 14 days |