CASTABLE REFRACTORY MATERIAL

摘要

PURPOSE: A low expansible basic castable refractory for a reflux pipe of a vacuum degassing equipment is provided which has excellent corrosion-resistance and spalling-resistance. CONSTITUTION: The basic castable refractory comprises: (i) 55-80 wt.% of all molten mag-chro clinker containing 20-30 wt.% of chromium; (ii) 12-30 wt.% of alumina-magnesia(Al2O3-MgO) spinel clinker; (iii)5-15 wt.% of sintered magnesia; and (iv) 3-5 wt.% of magnesium sulfate, wherein the alumina-magnesia(Al2O3-MgO) spinel clinker is a mixture of powders having a particle size of 0.5-1 millimeter and powders having a particle size of not more than 10 micrometers.