Mullite Castable

Mullite castables can be used at high temperatures and as working liners in direct contact with flames. Suitable for petrochemical tubular heating furnace, light diesel oil, ethane cracking furnace lining, atmospheric pressure reducing furnace, sulfur recovery device, steam boiler, turtle mesh insulation layer, double-layer bobbin insulation single layer, other industrial furnace doors, Observation fire hole, observation hole door lining, etc.

Mullite castables performance index

Mullite castables	MJ55	MJ60	MJ65	MJ70
Al2O3 content, % ≥	55	60	65	70
Bulk density, g/cm3 ≥	2.2	2.3	2.4	2.5
Flexural strength, MPa ≥	7	7	8	9
Compressive strength, MPa ≥	30	35	40	45
Linear variation(%) ≤	±0.5	±0.5	±0.5	±0.5
Maximum use temperature, ℃	1450	1500	1550	1600

Mullite castable has high temperature and can be used as working lining in direct contact with flame to realize high temperature and energy saving; The unit volume weight is light, the structural weight is reduced by 40-60%, and the hidden danger of brick breaking of hanging bricks on the furnace top is eliminated; Low thermal conductivity, porous mullite aggregate batching, low thermal conductivity, good thermal insulation performance; It can quickly dry the furnace, shorten the drying period, and achieve remarkable economic benefits.

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