| 摘要 |
PURPOSE:To render a dense structure and residual expandability, to reduce wettability with slag and to improve thermal spalling resistance by adding a Cr-B alloy and Al and/or an Al alloy to a refractory material in the form of fine powders. CONSTITUTION:One or more kinds of refractory materials are prepd. and 0.5-10% Cr-B alloy having (1:1)-(1:2) molar ratio of Cr:B and contg. <=10% impuri ties, and 0.5-5.0% Al and/or Al alloy contg. <=10% impurities are added to the refractory materials in the form of fine powders of <=150mum particle size. They are kneaded with a proper org. and/or inorg. binder and the kneaded material is molded and hardened at 150-1,000 deg.C. |
