Practical Test of Special Silica Bricks (Silica bricks containing Cr2O3)
Katsushige Nagami, Kenichi Isoda
Special silica bricks containing Cr2O3 8% have the property of higher resistance to iron oxide absorption than common silica bricks, retaining, however, the characteristics of silica bricks which have high-softening temperature, strong compressive strength, and high thermal expansion.
The characteristics of these bricks are as follows;
(1) Absorption of Fe2O3 in these bricks are nearly stoPPed only at the surface layer.
(2) Decrease of refractoriness by the absorption of Fe2O3 in these bricks are smaller than comrnon silica bricks.
The results of the practical test of these bricks are as follows;
(1) Corrosion of these bricks is decreased 36-64% than high-Al2O3 chamotte bricks, when on lower part of the side walls of the up-take is used.
(2) Corrosion of these bricks is decreased 59-70% than common silica bricks, when they are used on the walls of the slag-chamber,
(3) Corrosion of these bricks is decreased 50% than common silica bricks, when they are used on the slag-chamber arch.