Fused Silica Brick for Hot Repair of Coke Oven

The property of fused silica brick is similar to general silica brick, but it has better thermal shock resistance, much lower thermal expansion and it can stand suddenly change of temperature. It also can be heated in very short time after buildup and do not need to calculate thermal expansion. So we can directly use its cold size for masonry.Our fused silica bricks are shaped by the 1000tons hydraulic pressing machine and totally different from the traditional pouring shaping procedure. The bricks can remain the original shape of design as well as increasing the coke oven service life. The repaired the flame path can be heated up to operation temperature in two days, this is an advantage in saving energy and reducing waste area. Brand ItemFused Silica BrickSiO2 %9799Al2O3 %≤ 0.6≤ 0.5Fe2O3 %≤ 0.4≤ 0.3CaO %≤ 1.0≤ 1.0Na2O+K2O %≤ 0.5≤ 0.2Apparent porosity %≤ 23≤ 18.5Cold crushing strength Mpa≥ 20≥ 30Thermal expansion at 1000°C %≤ 0.3≤ 0.3Refractoriness under load (T0.6)1670 °C1670 °CThermal shock resistance 1100°C/water ( cycles)≥ 30≥ 30