Fire clay bricks
Fire bricks or fire clay bricks are made from the fire clay. The process of manufacturing of these bricks is same as the ordinary bricks but are burnt at very high temperatures in a special type of kilns generally Hofmann’s kill. The raw materials of these bricks consists of flint clay and grog that has burned fire clay as non plastic materials and soft fire clay as plastic material.
- Color of these bricks is whitish-yellow or light brown.
- Comp strength of fire clay bricks varies from 3.5 N/mm2 to 48.26 N/mm2.
- The water absorption % of fire bricks varies from 4 – 10%.
- These bricks are generally used in lining furnaces kilns, fire boxes and fireplaces.