A fire brick, firebrick, or refractory brick is a block of refractory ceramic material used in lining furnaces, kilns, fireboxes, and fireplaces. A refractory brick is built primarily to withstand high temperature, but will also usually have a low thermal conductivity for greater energy efficiency. Fire Clay Bricks are the oldest building materials in the world. Fire clay bricks for sale are made of clay clinker and refractory clay. The alumina content of the fire clay bricks for sale is 30%~40%. Fire clay bricks for  sale is a kind of refractory brick with large production, low price and wide use. Usually, fire clay bricks  are used in civil and architectural engineering.


  • Al2O3 content 30~48%, SiO2 50~65%.
  • Low thermal conductivity.
  • Low coefficient of linear expansion.
  • Good thermal shock resistance.
  • Good acid slag resistance.
  • Fire protection.
  • Heat and sound insulation.
  • Moisture absorption.


Fire clay bricks are acid refractory products, and the acidity of fire clay brick increases with the increase of silica content. The fire clay bricks have a certain anti erosion ability for acid slag, but the resistance to alkaline slag erosion is weak, so the fire clay bricks are suitable for the lining of acid furnace. Fire clay bricks are also used in blast furnace, hot blast stove, glass kiln, carbon baking furnace and other high temperature equipment.

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