Technical data of andalusite bricks
H45 h60
Al2o3% 45-50 60
Sio2% 47-52 37
Fe2o3% < 1.5 <1.5
Na2o+k2o% < 1.0 < 1.0
Bulk density (g/cm3)2.25 2.4
Cold crashing strength (mpa)50min.50min
Technical data of mullite-cordierite products
Bulk density ·+g/cm3·¼fª2.19
Apparent porosity (%) 26
Thermal expansion coefficient
Refractoriness under load t o.6·+f¦ >1380
Thermal shock resistance (water quenching at 1100f¦) >50
Max. Sercice temperature f¦ 1250
Mullite 70
Technical data of mullite m70 code
Al2o3/% 68-73
Sio2/% 22-25
Fe2o3/% f_1
K2o+na2o/% f_0.33
Codebullk density/g.Cm3 fª2.8
Water absorption/% f_3
Refactoriness >1850
