Refractory Mullite Brick for hot blast stove

Specifications Low thermal conductivity

High purity and low iron content

.High temperature resistance

.Direct contact with the flame

Refractory Mullite Brick for Hot Blast Stove The mullite insulating brick which is produced by synthetic mullite sand and polystyrene sphere has better performance than clay insulating brick and high alumina insulating brick. 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

    *Low thermal conductivity  *High purity and low iron content  *Good thermal resistance with direct access to fire  *High strength and superior thermal shock resistance *Accurate dimension and easy cutting