Brand Item		General  Silica  Brick
		GZ-96	GZ-95	GZ-94
SiO2   %		≥96	≥95	≥94
Fe2O3  %		≤1.0	≤1.2	≤1.4
Apparent porosity       %		≤22 (24)
Cold crushing strength  Mpa	Unit weight﹤20 kg	≥35 (30)
	Unit weight ≥<??>20 kg	≥30 (25)
0.2Mpa Refractoriness under load  ℃		≥1660	≥1650	≥1640
True density                     g/cm3		≤2.34	≤2.35