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A fire brick, firebrick, fireclay brick, or refractory brick is a block of 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 .
The Harbison-Walker Refractories Company is a national historic district and historic refractory brick manufacturing complex which is located in Mount Union in Huntingdon County, Pennsylvania. It originated as the Star Firebrick Company on March 7, 1865, with Articles of Association by a group of Pittsburgh and Allegheny residents.
Fire clay in a furnace. Fire clay is a range of refractory clays used in the manufacture of ceramics, especially fire brick.The United States Environmental Protection Agency defines fire clay very generally as a "mineral aggregate composed of hydrous silicates of aluminium (Al 2 O 3 ·2SiO 2 ·2H 2 O) with or without free silica."
Refractory bricks in a torpedo car used for hauling molten iron. In materials science, a refractory (or refractory material) is a material that is resistant to decomposition by heat or chemical attack and that retains its strength and rigidity at high temperatures. [1]
William A.L. Schaefer, in 1914, developed the first monolithic refractory and created the Pliable Firebrick Company, which is also known as Plibrico. Calderys was formed in 2005 by the merger of Plibrico International & Lafarge Refractories. Calderys expanded in Asia by acquiring ACE Refractories in India in 2007.
The company also supplies refractory minerals to other refractory manufacturers for use in the ceramics industries as well as in welding and road surface products. Despite the closure in the 1990s of the nearby silica pits which supplied raw materials, the company remains a major local employer. As at 2015, it employed approximately 115 people. [1]
In 1974 the company was bought by National Refractories Co. and in 1987 Radex-Heraklith Industriebeteiligungs AG ('RHI AG') emerged from the National Refractories Co. as a result of a management buyout. [3] Then in 1991 RHI AG acquired Veitscher Magnesitwerke Actien-Gesellschaft, a rival business founded by Carl Spaeter in Germany in 1889. [3]
In Middle and South Europe, grog is used to create fire-resistant chamotte type bricks and mortar for construction of fireplaces, old-style and industrial furnaces, and as component of high temperature application sealants and adhesives. A typical example of domestic use is a pizza stone made from chamotte. Because the stone can absorb heat ...
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