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High aluminum grid brick
High-alumina brick for hot-blast furnace is a refractory product which is calcined high-quality high-alumina bauxite clinker and binder first through granulation and pulverization processes, mixed in a certain proportion, and then press-molded and fired at high temperature. According to the physical and chemical indicators, it is divided into three brands: RL-65, RL-55, and RL-48. Mainly used for masonry hot blast stove wall.
Physical and chemical indicators:
|Al2O3 % ≥||65||55||48|
|Refractory ℃ ≥||1780||1760||1740|
|Apparent porosity % ≤||22(24)||22(24)||22(24)|
|Temperature compressive strength Mpa ≥||50||45||40|
|0.2MPaLoad softening start temperature ℃ ≥||1500||1470||1420|
|Reburning line change %||