Blast furnace main gutter slag line casting refractory

摘要

PROBLEM TO BE SOLVED: To provide a casting refractory for blast furnace main trough slag line capable of exhibiting antioxidation effects over longer time compared to conventional ones, further effectively exhibiting anticorrosion function of non-oxide such as carbonized silicon and carbon, without deteriorating explosion resistance.SOLUTION: The casting refractory for blast furnace main trough slag line contains a carbonized silicon raw material of 50 to 90 mass%, an alumina raw material of 1 to 41 mass%, and a carbonaceous raw material consisting of carbon black, pitch and mesophase pitch in a range of 0.9 to 21 mass%, the carbon black in a range of 0.3 to 9 mass%, the pitch in a range of 0.3 to 5 mass% and the mesophase pitch in a range of 0.3 to 7 mass% in a carbonized silicon-alumina-carbon-based casting refractory for blast furnace main trough slag line.SELECTED DRAWING: None