| GRADE | SF96 | SF94 | SF90 | SF88 | SF85 | |||||
| SPECIFICATION | GUARANTEE VALUE | TYPICAL VALUE | GUARANTEE VALUE | TYPICAL VALUE | GUARANTEE VALUE | TYPICAL VALUE | GUARANTEE | TYPICAL VALUE | GUARANTEE VALUE | TYPICAL VALUE |
| VALUE | ||||||||||
| SiO2, % | ≥96.0 | 96.46 | ≥94.0 | 94.58 | ≥90.0 | 90.16 | ≥88.0 | 88.46 | ≥85.0 | 85.28 |
| AL2O3 , % | ≤1.0 | 0.79 | ≤1.0 | 0.89 | ≤1.5 | 1.2 | — | — | — | — |
| Fe2O3 ,% | ≤1.0 | 0.21 | ≤1.0 | 0.68 | ≤2.0 | 1.28 | — | — | — | — |
| CaO+MgO,% | ≤1.0 | 0.98 | ≤1.5 | 1.45 | ≤2.0 | 1.78 | — | — | — | — |
| K2O+Na2O,% | ≤1.0 | 0.79 | ≤1.5 | 1.24 | ≤2.0 | 1.95 | — | — | — | — |
| C, % | ≤1.0 | 0.48 | ≤2.0 | 1.28 | ≤2.0 | 1.69 | ≤2.5 | 2.2 | ≤2.5 | 2.48 |
| Loss on Ignition (LOI), % | ≤1.0 | 0.88 | ≤3.0 | 2.6 | ≤3.0 | 2.49 | ≤4.0 | 3.1 | ≤6.0 | 3.6 |
| PH , % | 4.5~6.5 | 5.5 | 4.5~7.5 | 6.1 | 4.5~7.5 | 6.6 | 4.5~8.5 | 7.48 | – | 7.77 |
| Oversize percent retained on 45-um(325 sieve), % | ≤3.0 | 2.59 | ≤3.0 | 2.66 | ≤5.0 | 4.12 | ≤8.0 | 6.12 | ≤10.0 | 7.06 |
| Specific Surface,m2/g% | ≥15 | 18 | ≥15 | 18 | ≥15 | 17 | ≥15 | 20 | ≥15 | 22 |
| Moisture , % | ≤1.0 | 0.63 | ≤2.0 | 1.58 | ≤2.5 | 2.33 | ≤3.0 | 2.45 | ≤3.0 | |
