High Strength Refractory Mortar, Shape : Powder

Model
Material Clay High Alumina Corundum Light-weight
Type NF-1 NF LF�70 LF�75 GF QF
Chemical composition (%) Al2O3� 38 40 70 75 80 40
SiO2� 55 50 20 12 5 55
SiC� � � � 3 � �
Fe2O3� 1 0.8 0.7 0.5 0.3 0.5
R2O� 1.4 1.2 1 0.6 0.5 1
Tie time (min) 1�2 1�3 2�3 2�3 3�5 1�5
L.O.I. (%) 6 6 5 5 4 6.5
Additional water (%) 30 28 25 25 25 30
Method of bonded Ceramic Ceramic Chemical Chemical Araldite Silicate
Bonding strength (MPa) 110��24h
After drying at 0.8 0.8 1.2 1.5 0.8 0.5
1250��3h
After firing at 3.0 3.0 2.0 2.0 1.5 �
Grain size (%) �1mm 4 �1 �1.5 �1 �1 �1.5
�0.105mm 52 �75 �80 �85 �90 �70
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