| Remarks | 
Carefully chosen source material,high intensity and convenient for construction,used in the important part of furmaces and kilns. | 
Corrosion- resistant,high refractoriness under load,suitable for abrasion- resistant parts. | 
Little thermal expansion,and stable size,suitable for the top part of combustor and furnace wall and throat. | 
Convenient for construction,not strict for firing,hotly hardened casting material,used the abrasion- resistant part of combustor and material outlet under 1450¡æ | 
Good abrasion resistant ability,convenient for construction,function can be adjusted according to user srequire-ment. |