Silica Brick

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

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