Mullite Insulating Brick Description : Mullite bricks are high alumina refractories with mullite as the main crystal phase. Generally, the alumina content is between 65% and 75%, and the refractory of mullite brick is relatively high, reaching above 1790 ℃. The starting temperature of load softening is 1600 ~ 1700 ℃. Good thermal shock resistance. There are two kinds of sintered mullite bricks and fused mullite bricks.Standard size 230 x 114 x 65 mm or according to customer requirements. 
Characteristics of Mullite Insulation Bricks 
1. Mullite insulation bricks have high fire resistance and can be directly exposed to flames. 
2. Mullite fire bricks have the characteristics of light weight, high strength, low thermal conductivity and good thermal shock resistance. 
3. Mullite bricks have the advantages of high porosity, small bulk density, good thermal insulation effect, and long service life. 
4. Mullite refractory bricks are important energy-saving, thermal insulation and refractory materials for various industrial kilns.

Product Advantage

Product Parameters

Mullite Insulation Brick
Item/Index		RS23	RS26	RS28	RS30	RS32
Al2O3 %		37	54	64	72	77
Fe2O3 %		1	0.9	0.8	0.7	0.5
Thermal Conductivity (w/m*k)	400℃	0.14	0.27	0.32	0.41	0.49
	600℃	0.16	0.29	0.34	0.43	0.5
	800℃	0.18	0.31	0.36	0.44	0.51
	1000℃	0.2	0.33	0.38	0.45	0.53
Classification Temperature (℃)		1260	1430	1540	1650	1760
Thermal Expansion 1000℃ (%)		0.5	0.7	0.8	0.9	1.1
Bulk Density (g/cm3)		0.55-0.62	0.78-0.8	0.88	1.03	1.25
Cold Crushing Strength (Mpa)		1.2	1.6	2.1	2.5	3.5
Modulus of Rupture (Mpa)		0.9	1.4	1.6	2.1	2.1
Reheating Linear Change (%)		1230℃	1400℃	1510℃	1620℃	1730℃
CT-30℃*8H		-0.5	-0.5	-0.5	-0.9	-0.9

Product Application

Product Tags:

fireclay bricks for blast furnace

refractory bricks for blast furnace

mullite insulating fire brick

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