▎ 摘　　要

NOVELTY - Special castable material comprises 43-58 pts. wt. mullite, 6-14 pts. wt. silicon carbide, 5-13 pts. wt. calcium titanate aluminate, 8-15 pts. wt. corundum, 1.8-3.7 pts. wt. cement, 2-5 pts. wt. aluminium oxide micro powder, 2-5 pts. wt. silicon micro powder, 5-12 pts. wt. silicon nitride powder, 1-5 pts. wt. strontium titanate powder, 13-21 pts. wt. sillimanite powder and zirconium carbonate powder, 0.01-0.05 pts. wt. extra fiber and 0.05-0.18 pt. wt. graphene modified water reducing agent. The mullite is a mixture of 5-3mm mullite, 3-1 mm mullite, 1-0.088 mm mullite, and less than 0.088 mm mullite in a weight ratio of 15-30:5-12:2-7:5-12. The silicon carbide is a mixture of 1-0.088 mm silicon carbide and less than 0.088 mm silicon carbide in a weight ratio of 1-3:2-4. USE - The special castable material is useful for kiln mouth of cement kiln (claimed). DETAILED DESCRIPTION - Special castable material comprises 43-58 pts. wt. mullite, 6-14 pts. wt. silicon carbide, 5-13 pts. wt. calcium titanate aluminate, 8-15 pts. wt. corundum, 1.8-3.7 pts. wt. cement, 2-5 pts. wt. aluminium oxide micro powder, 2-5 pts. wt. silicon micro powder, 5-12 pts. wt. silicon nitride powder, 1-5 pts. wt. strontium titanate powder, 13-21 pts. wt. sillimanite powder and zirconium carbonate powder, 0.01-0.05 pts. wt. extra fiber and 0.05-0.18 pt. wt. graphene modified water reducing agent. The mullite is a mixture of 5-3mm mullite, 3-1 mm mullite, 1-0.088 mm mullite, and less than 0.088 mm mullite in a weight ratio of 15-30:5-12:2-7:5-12. The silicon carbide is a mixture of 1-0.088 mm silicon carbide and less than 0.088 mm silicon carbide in a weight ratio of 1-3:2-4. The calcium titanate aluminate is a mixture of 3-1 mm calcium titanate aluminate and less than 1 mm calcium titanate aluminate in a weight ratio of 5-8:16-23. The corundum is a mixture of 3-1 mm corundum, 1-0.5 mm corundum and less than 0.5 mm corundum in a weight ratio of 7-13:3-8:1-3.