... And Chemical Indicators 1.Siiica refractory brick: Product of silica bricks are the main refractory material for coke oven , ... ).High thermal conductivity.3).Excellent thermal shock resistance.Silica refractory bricks are with good dense, high RUL, pure ... color and accurate size.Silica refractory bricks with ISOcertificate 9001:2008,good refractoriness refractory material.Silica bricks can resist ...