Mullite Insulating 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)Our brick mainly are used in the field of lining and backing of the hot surface of cracking heater, reborner, hot-blast furnace, heating furnace, soaking pit, heat treatment furnaces,  resistance furnace, heating device, refining device, tunnel kiln, roller kiln,  shuttle kiln, top-hat kiln and glass tank furnace in the industries of metallurgy, petrochemical, building materials, ceramics, machinery 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