Refractory Bricks

Refractory bricks, also called Refractory Fire Bricks, are prepared from fire clay in the same manner as ordinary bricks. Refractory bricks contain about 30% alumina and 70% silica. After drying, they are burnt in kilns at high temperature ranging from 1400–1900°C. These bricks are yellowish white in colour.

As the fire bricks can resist high temperatures without softening or melting, they are used for the linings of interior surfaces of furnaces, chimneys, kilns, ovens, fireplaces, etc. The compressive strength of these bricks varies from 200–220 N/mm², and the percentage absorption varies from 5–10.