Phosphoric acid immersed fireclay brick for blast furnace: Phosphoric acid immersed fireclay bricks are the fire-resistant fireclay products which are made from the bauxite clinker and phosphoric acid or aluminum phosphate. Phosphoric acid immersed fireclay brick is immersed by the phosphoric acid at low-temperature after high-temperature firing, mainly used in the central body and the cooling wall of the large-scale blast furnaces.
Mark |
Index |
ω(Al2O3)/% |
41~45 |
ω(P2O5)/% |
≥7 |
ω(Fe2O3)/% |
≤1.8 |
0.2MPa Refractoriness under load/℃ |
≥1450 |
Reheating linear change % (1450℃,3h) |
—0.2~0 |
Apparent porosity,% |
≤14 |
Compressive strength atr normal temperature /M Pa |
≥60 |
Alkali-resistance (rate of decline in strength ) / % |
≤15 |
|