Silica bricks are the key refractories for high temperature area of industrial kilns and furnaces including coke oven, hot blast

Name   Item		Silica brick     for coke oven     G-D	Silica brick          for hot      blast stoves       RG-94	Silica brick       for glass furnace     BG-95	Normal Silica brick
					GZ-95	GZ-94	GZ-93
Chemical Competent %	SiO2	≥93	≥94	≥95	≥95	≥94	≥93
	Al2O3	≤1.5	≤1.0	≤1.0
	Fe2O3	≤1.5	≤1.5	≤1.0
	CaO	≤3		≤2.5
True density,g/cm3		≤2.34	≤2.34	≤2.34	≤2.37	≤2.38	≤2.40
Apparent porosity,  %		≤22	≤22	≤22	≤22	≤23	≤25
Cold crushing strength, Mpa		≥35	≥35	≥35	≥30	≥25	≥20
Refractoriness ºC		≥1690	≥1710	≥1710	≥1710	≥1710	≥1690
Initial soften point under load(ºC)2MPa×0.6%		1650	≥1650	1650	≥1650	≥1640	≥1620
Creep rate(%) 2MPa 1550ºC×2h			≤1
Permanent linear change on reheating,% 1450ºC×2h			+0.2
Thermal expansion,% (1000ºC)		≤1.25	≤1.25	≤1.26
Application		coke oven	high temperature part of regenerator of hot blast stove	glass furnace	coke oven, hot blast stove, glass furnace and other kinds      of industrial furnaces