
|
Metallurgical grade |
||||
| Grade | Si%min | Fe%max | Al%max | Ca%max |
| 553 | 98.5 | 0.5 | 0.5 | 0.3 |
| 441 | 99 | 0.4 | 0.4 | 0.1 |
| 3/3/05 | 99 | 0.3 | 0.3 | 0.05 |
| 2/2/02 | 99 | 0.2 | 0.2 | 0.02 |
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