Open hearth furnaces are the furnaces where excess carbon and other impurities are burnt out of Pig iron to produce Steel. Since steel is difficult to manufacture due to its high melting point normal fuels and furnaces were insufficent, and the open hearth furnace was developed to overcome this difficulty. Pig iron is raw iron, the immediate product of smelting iron ore with coke and limestone in a blast furnace. ... Steel framework Steel is a metal alloy whose major component is iron, with carbon being the primary alloying material. ... The melting point of a solid is the temperature at which it changes state from solid to liquid. ...
This furnace operates at a high temperature by using regenerative preheating of fuel and air for combustion. In regenerative preheating, the exhaust gases from the furnace are pumped into a chamber containing bricks, where heat is transferred from the gases to the bricks. The flow of the furnace is reversed so that fuel and air pass through the chamber and are heated by the bricks. Through this method, a open-hearth furnace can reach temperatures high enough to melt steel. Combustion or burning is an exothermic reaction between a substance (the fuel) and a gas (the oxidizer) to release heat. ...
The development of the Catalan forge during the Middle Ages was a major advance in the science of metallurgy. The Middle Ages formed the middle period in a traditional schematic division of European history into three ages: the classical civilization of Antiquity, the Middle Ages, and modern times, beginning with the Renaissance. ... Metallurgy is a domain of materials science and of materials engineering that studies the physical and chemical behavior of metallic elements and their mixtures, which are called alloys. ...
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