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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.
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.
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 etc.
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.