73139833
Sep 2, 1977
Jan 27, 1981
Refractory Composition Composed of Calcined High Alumina Nodular Clays, Flint Clays, High Fusion Bond Clays and Carbon; for Lining Ladles, Steel Runners, Blast Furnace Runners, Overflow Spouts of Steel and Iron Ladles and Blast Furnace Troughs and Tap Holes
Nonmetallic Building Materials