A fire brick, firebrick, or refractory brick is a block of
refractory ceramic material used in lining furnaces, kilns,
fireboxes, and fireplaces. Firebrick is built primarily to
withstand high heat, usually have a low thermal conductivity to
save energy. Which Includes Silica bricks, high alumina bricks,
Aluminum silicate firebricks, alkaline bricks, etc.
A refractory brick is built primarily to withstand high
temperature, but will also usually have a low thermal conductivity
for greater energy efficiency. Usually dense firebricks are used in
applications with extreme mechanical, chemical, or thermal
stresses, such as the inside of a wood-fired kiln or a furnace,
which is subject to abrasion from wood, fluxing from ash or slag,
and high temperatures.
In other, less harsh situations, such as a natural gas fired kiln,
more porous bricks are a better choice. They are weaker, but they
are much lighter, easier to form, and insulate far better than
dense bricks. In any case, firebricks should not spall under rapid
temperature change, and their strength should hold up well during
rapid temperature changes.
Normal Firebrick is not good insulators. A special insulating
Firebrick of highly porous fireclay or kaolin has low conductivity
and low heat content but a melting point of only about 1,600°F to
2,800°F (870°C-1,540°C).Density is lower 1.3g/cm3, it is light
weight Firebrick or insulating brick.
2. Raw Materials of Firebrick
Firebrick raw materials consisting of nonmetallic minerals formed
in a variety of shapes for use at high temperatures, particularly
in structures for metallurgical operations and glass manufacturing.
The price of firebrick varies depending mostly on the cost of
freight. Generally it's around three or four dollars per brick in
small quantities - much less if a dealer brings it in on full
truckloads. Let us know what you need and we will try to get you
the best source and price.
3. Firebrick Technical Index
Different level Firebricks is depends on the detail
specification. The main specification is: Refractoriness, Bulk
density, Refractoriness under load, Compressive strength, linear
change after reheating, apparent porosity, Thermal shock resistance
4. Firebrick Applications
The greatest use of Firebrick is in the steel industry, where
they are used for construction of linings of equipment such as
blast furnaces, hot stoves, and open-hearth furnaces. Other
important uses of Firebricks are for cement kilns, glass tanks,
nonferrous metallurgical furnaces, ceramic kilns, steam boilers,
and paper plants. Special types of Firebricks are used in rockets,
jets, and nuclear power plants.
The Fire Brick and Refractory Company supply quality refractory
products and exceptional service
to the domestic, commercial and industrial sectors, as well as
offering technical support.