... . good chemical stability 3. high strength The corundum mullite series castables, prepared with tabular alumina, white fused alumina, fused mullite, etc. ... high refractoriness, good chemical stability, high strength, etc.. The castables with Al2O3≥94% are corumdum castables.The castables are mainly used ... chemical equipment in chemical and metallurgical industry. Corumdum mullite series castables