Mullite Insulation Brick Refractory Brick

Specifications Low thermal conductivity

High purity and low iron content

Accurate dimension and easy cutting

direct access to fire

Mullite Insulation Brick  Refractory Brick  1) Mullite Insulation Brick is manufactured from high-grade refractory powder and materials in good purity, compressed in vacuum and sintered under high temperature. It covers six temperature classes: 1300C, 1400C, 1500C, 1550C, 1600C, includes standard brick, special-shaped brick, and refractory mortar. 2)Used in various of industrial furnaces, such as metallurgy, construction, ceramic, machinery etc, for liner and backing,  such as cracking furnace, reforming furnace, heating equipment, refining equipment, hot blast stove, heating furnace, soaking pit,  thermal treatment furnace, resistance furnace, tunnel kiln, roller kiln,  shuttle kiln, immersion bell, glass furnace etc.  

Brand	VMC-48	VMC-49	VMC-50	VMC-55	VMC-57	VMC-57	VMC-60	VMC-67
Bulk density g/cm3  ≤	0.6	0.8	1	0.6	0.8	1	1	1.2
Cold Crushing    strength Mpa ≥	1.5	2.5	4.2	1.5	3.2	4	4	5
Thermal stability 1100°C (air colling)	10	20	20	10	20	20	20	20
Reheating linear  change ≤  1% (°Cxh)	1300x12	1300x12	1300x12	1400x12	1400x12	1400x12	1500x12	1500x12
Thermal conductivity 350±25° (W/m.k)  ≤	0.2	0.23	0.33	0.2	0.25	0.33	0.35	0.4
Al2O3 % ≥	48	49	50	55	57	57	60	67
Fe2O3 % ≥	0.9	0.9	0.9	0.8	0.8	0.8	0.7	0.6

    *High strength and resistance to corrosion, *Good thermal resistance with direct access to fire *High corundum content; *Excellent thermal shock resistance, *Low thermal conductivity *Low content of impurities, *Accurate dimension and easy cutting