siliceous mullite brick used for up and lower transition zone, the problems in the up and lower transition zone are: temperature changes frequently and not easy to build kiln coating. the brick lining is sustained destructive force.
while the siliceous mullite brick could solve the problems perfectly.
the refractoriness: SART-AZM1650:1790; RTSA-AZM1680: 1800
the refractoriness under load(0.2MPa): RTSA-AZM1650: 1600; RTSA-ZAM1680: 1650
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