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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.
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 .
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The Evens & Howard Fire Brick Company was a manufacturer of fire bricks, sewage pipe and gas retorts in what is now the Cheltenham neighborhood of St. Louis, Missouri. It was founded formally in 1855 as the Cheltenham Fireclay Works and achieved sales as far away as Quebec [ 1 ] and Africa .
Hebron Brick is a brick manufacturing company located in West Fargo, North Dakota. It is also the only brick company in North Dakota . Charles Weigel and Ferdinand Leutz established Hebron Fire & Pressed Brick Company in 1904.
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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." [1]
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