Clay brick is a finished product made of calcined refractory clay (clinker) and some soft refractory clay (bonded clay) through crushing, mixing, molding, drying, firing and other processes.
Characteristics of clay bricks for coke ovens are as below:
(1) The refractoriness of clay bricks. The refractoriness of clay refractory products is low, and its refractoriness increases with the its Al2O3 content, and its refractoriness is generally 1580~1750℃.
(2) The softening temperature of clay bricks under load. The softening temperature of clay refractory products are relatively low, usually lower than 1300℃. From the beginning of softening to deformation (compression) of 40%, the temperature interval is between 150 and 250 ° C.
(3) The thermal stability of clay bricks. The thermal stability of clay-based refractory products is good. When being heated to 1100 °C, the total volume expansion is small and the change is uniform, so the ability to resist temperature change is strong. Common clinker clay bricks can be water cooled for 10 to 20 times, and multi-clinker clay bricks can generally be water cooled for more than 50 times, and some bricks can be cooled for as high as 100 times or more.
Next issue we will continue to introduce characteristics of clay bricks for coke ovens. Please stay tuned!
