project Mullite Brick Sillimanite Brick Main Ingredients Mullite (3Al2O2·2SiO2), 65% to 75% alumina Sillimanite minerals, after high temperature calcination, are transformed into mullite and free silica Refractoriness 1790℃ above 1770～1830℃ Load softening start temperature 1600～1700℃ 1500～1650℃ Compressive strength 70～260MPa better Thermal shock resistance good better Manufacturing method Sintering and electrofusion High temperature firing method and […]