High alumina bricks are a common type of refractory brick, mainly referring to silica-alumina refractory materials with an Al2O3 content of over 48%. They are used in metallurgical kilns, building material kilns, and other thermal equipment. High alumina refractory bricks are typically used in the carbonization chamber of coke ovens.
一.The areas where high alumina bricks are used for coke oven construction include: The furnace heads at both ends of the carbonization chamber.
The carbonization chamber of a coke oven is the area where coal is coked. The coal enters through the furnace head and undergoes carbonization. Once carbonization is complete, the coke is discharged through the furnace door. At this point, the furnace door area is exposed to cold air, causing a decrease in temperature. To ensure the long-term normal operation of the furnace head, this area needs to be constructed with high alumina bricks that have good thermal shock resistance and high load softening temperature.
二 .Characteristics of high alumina bricks used in coke ovens:
High refractoriness
High load softening temperature
Good thermal shock resistance
Strong resistance to slag erosion
High mechanical strength and good abrasion resistance
There are many types of refractory bricks used in coke ovens, such as clay bricks, high alumina bricks, and silica bricks. The most commonly used refractory brick in coke ovens is silica brick. Different types of refractory bricks are used in different parts of the coke oven, and the physicochemical properties of refractory bricks vary for different sizes of coke ovens. The specific physicochemical indicators of refractory bricks need to be determined based on actual conditions.