Cast Big Mullite Brick

Mullite brick IS characterized by good high temperature resistance and good thermal shock resistance, whick comes into being mullite through calcine with clay, high alumina materials and ceramics.

►The main applications are:
Sulfuric cracking furnace
Fibrous glass furnance.

►Specifications:
Low permanent linear change on reheating;
Good Thermal Shock Stability;
High dense structure.

►Advantages:
High quality;
chemical corrosion- resistance.

►Physical and chemical index

Item		MU 60	MU 65	MU 70	MU 75
Chemical composition	Al2O3	≥60	≥65	≥70	≥75
	SiO2	≤35	≤33	≤26	≤24
	Fe2O3	≤1.0	≤1.0	≤0.6	≤0.4
Apparent Porosity％		≤17	≤17	≤17	≤18
Bulk Density g/cm3		≥2.55	≥2.55	≥2.55	≥2.55
Cold Crushing Strength Mpa		≥60	≥60	≥80	≥80
0.2Mpa Refractoriness Under Load T0.6 ℃		≥1580	≥1600	≥1600	≥1650
Permanent Linear Change On Reheating （%）1500℃X2h		0～+0.4	0～+0.4	0～+0.4	0～+0.4
Thermal Shock Resistances 100℃ water cycles		≥18	≥18	≥18	≥18
20－1000℃ Thermal Expansich10-6/℃		0.6	0.6	0.6	0.55
Thermal Conductivity (W/MK) 1000℃		1.74	1.84	1.95	1.95

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