China's Refractories

Abstract: In this still undergoing work, three approaches have been adopted to incorporate natural flake graphite into Al2O3-SiC-C castables by adding either micropellets of graphite or crushed briquette of alumina-graphite or finally surface modified flake graphite by TiO2 coating. Characteristics of these approached are described. Overall properties including flowability, compactness, cold and hot strengths, slag resistance, anti-oxidation and thermal shock resistance of the castables have been compared in correlation with the ways of incorporating graphite. Very encouraging results have been achieved by using micropellets of graphite or crushed alumina-graphite briquette in comparison with straight natural flake graphite addition.