Furnace wall bricks - having improved mech strength and stability to temp changes

摘要

The bricks, manufactured from high grade clay materials and faced with fire resistant oxides, have open pores of 100 mu to 300 mu in diameter and their high temp. side, while being provided with feed channels on their opposite or fixing chamber side from which the combustion gas/air mixt. is being supplied. The open porosity is 25-40% and the area of the channels is >=10% of the sectional area of the brick. The radiation surface is coarse to increase emmissivity.