COVERING MATERIAL FOR SURFACE OF MOLTEN METAL

摘要

PURPOSE:To prevent the cooling and oxidation of molten metal and the generation of gaseous hydrogen satisfactorily by using a covering material for molten metal surfaces which consists of lumped calcium silicate moldings of specified density and loss of weight. CONSTITUTION:A covering material for molten metal surfaces consists of calcium silicate moldings having 0.7-1.4g/cm<2> densities, <=6wt% loss of weight on heating for 3hr at 650 deg.C and of lumped shapes. An arbitrary method such as a casting method, a press molding method or the like may be employed and spheres or polyhedral bodies resembling to these are preferable shapes. The covering material for molten metal surfaces which is effective for the heat insulation and for the prevention of property change of molten metal is obtained.