Several common refractory castable performance comparison
Refractory castable for cement kiln available exist follows: alkaline castable, high siliceous castable, high alumina castable .
1.Alkaline castable refers to mainly material is magnesia, magnesium aluminate spinel material .
Advantage : excellent alkali resistance
Disadvantage : larger thermal expansion coefficient and poor thermal shock resistance.
If solve the problem of thermal shock resistance, application effect is good in the cement kiln.
2.High-silica castable refers to alumina content is less than 30% aluminum-silicon material. These material react with alkaline compound in a certain temperature, form closed protective glaze layer in the surface, prevent penetration of the alkali to continue, protect material stops to alkali erosion .
Advantage : good alkali resistance .
Disadvantage : lower under-load temperature, lower strength and poor wear resistance .
3.High alumina castable refers to a class of materials mainly alumina. Include a variety of corundum mullite .
Advantage : higher hardness and higher wear resistance.
Disadvantage : not to bear alkali.
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