How about the performance of clay refractory bricks?

Clay refractory bricks are weakly acidic refractory products, which can resist the erosion of acid slag and acid gas, and have relatively poor resistance to alkaline substances. Clay refractory bricks have good thermal properties and are resistant to rapid cold and rapid heat.

The fire resistance of clay refractory bricks is equivalent to that of silica bricks, reaching 1690～1730℃, but the softening temperature under load is more than 200℃ lower than that of silica bricks. Because clay refractory bricks not only contain mullite crystals with high refractoriness, but also contain nearly half of the amorphous glass phase with low melting point.