Research in the Field of Preparing Molded and Unmolded Refractories Based on High-Alumina HCBS. Part 14. Composition and Some Properties of Composite Composition Ceramic Concretes in the System Al2O3–SiO2–SiC–C1

Abstract

Research is conducted on specimens of composite composition ceramic concrete specimens in the Al₂O₃ –SiO₂ –SiC–C system molded by pneumatic ramming. Ramming refractory mixes of similar composition are used extensively in preparing monolithic linings for blast furnace runners. The effect of firing temperature and heat treatment duration (50 and 100 h) is studied in the range 1300 – 1390°C for specimens on the main material properties. A considerable increase in specimen weight is detected caused by high-temperature oxidation of silicon carbide contained within the concrete. A method is proposed for evaluating the degree of silicon carbide oxidation.