| 摘要 |
PURPOSE:To obtain the title refractory having superior resistance to corrosion, permeation of slag and spalling by adding a specified hardening agent to a mixture consisting of prescribed amts. of high purity aluminous starting material, spinel clinker, magnesia clinker and amorphous silica. CONSTITUTION:A mixture consisting of >=57wt.% high purity aluminous starting material such as mixture of sintered alumina clinker with calcined alumina, 10-30wt.% spinel clinker such as sintered spinel, 1-10wt.% magnesia clinker of <0.21mm grain size such as sintered magnesia and 0.2-3wt.% amorphous silica is prepd. and alumina cement as a hardening agent is added to the mixture by 0.5-<3wt.% of the amt. of the mixture. Activated magnesia may be added as the hardening agent by 0.2-5wt.%. |
