Abstract:

By using electro-fused magnesia as raw material, the effects of adding amounts and modes of α-Al₂O₃ and Cr₂O₃ on the creep resistance of magnesian material under high temperature are studied.And on the basis of this, the effects of additions of different types of Al₂O₃ on the creep resistance of magnesian material under high temperature are studied with addition of 3% Cr₂O₃. The result shows that with the increase of addition amount of Al₂O₃ the creep resistance of magnesian material under high temperature has increased. The creep resistance of the magnesian material with addition of 3% Cr₂O₃ is better than that of the low creep resistance high alumina bricks used on hot blast stove.