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Refractory

SILICA BRICKS

Low true density, little residual quartz, high crushing strength, good thermal shock stability above 600, high strict dimension and less polishing work for a contribution to jointing, used in every part of coke over.
General silica bricks are used in coke oven, soaking pit and used as kiln furniture for firing refractories etc. Silica brick for hot blast stove is principally used in high temperature zones, such as roof, upper stack, upper checkers etc.

Index Item	Silica Brick	Silica brick for hot stoves	Silica brick for Glass furnaces		High quality silica brick for glass furnaces						Big size silica brick for glass furnaces
Index Item	GZ-95	LRG-95	BG-96	BG-95	XBG-96	ZBG-96	DBG-96	LBG-96A	LBG-96B	LBG-95	LDBG-94
SiO2 % ≥	95	95	95.5	95	96	96	96	96	96	94	94
Fe2O3 % ≤			1.0	1.2	1.0	1.0	1.2	1.0	1.0
Refractoriness ℃≥			1710	1710
Refractoriness under load ≥	1650	1660	1650	1650	1680	1680	1670	1680	1670	1660	1650
A.P. % ≤	22	22	21	22	22	23	24		22		25
Meltability Index % ≤					0.5	0.5	0.6	0.5	0.7	1.0
True density (g/cm³) ≤	2.37	2.34	2.37	2.38	2.34	2.34	2.35				2.36
C.C.S (Mpa) ≤	29.4	35	29.4	29.4	35	30	30	35	30	35	25
Linear change after reheating ≤		+0.2			0.3	0.3	0.3	+0.3	+0.3
Creep amt ≤		0.8
Thermal expansion ≥		1.25

Index Item	Silica Brick for Cokeoven				Insulating silica brick
Index Item	JG-94	LJG-95	LJG-93A	LJG-93B	LQG-0.8	LQG-1.0	LQG-1.0	LQG-1.5	LQG-1.2
SiO2 % ≥	94	95	93	93	88	1.96	91	91	91
Al2O3 % ≥			1.5	1.5
Fe2O3 % ≤			2.0	2.0
Refractoriness under load ℃≥	1650	1660	1650	1650
A.P. % ≤	22	22	22(23)	24(25)
C.C.S (Mpa) ≤	29.4	35	35(30)	30(25)	1.8	1.96	2.94	4.9	5.39
True density (g/cm³) ≤	2.35	2.34	2.34	2.35
Thermal expansion ≥		1.25	1.25	1.25	1.3
Linear change after reheating %≤	0.2	+0.2						+0.4	+0.4
Bulk density (g/cm³) ≥					0.8	1.0	1.1	1.15	1.2