Index name | Index | Index name | Index | ||||
First grade | Second grade | First grade | Second grade | ||||
F,% ≥ | 61 | 60 | SiO2+Fe2O3 %,≤ | 0.2 | 0.3 | ||
Al,% ≥ | 30 | 30 | Sulfate(SO4) %,≤ | 0.1 | 0.15 | ||
Na,% ≤ | 0.4 | 0.5 | P2O5 %,≤ | 0.005 | 0.005 | ||
Water content(H2O),% ≤ | 7 | 7.5 | Chemical ingredients are on dry base. Lump of over 4mm of diameter is acceptable in the product, and its weight cannot be bigger than 5%. |