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Modern furnaces[ edit ] Iron blast furnaces[ edit ] The blast furnace remains an important part of modern iron production. In this, the molten iron was tapped twice a day into water thereby granulating it. Usage of the blast and cupola furnace remained widespread during the Song and Tang Dynasties. Steam-powered blast[ edit ] The steam engine was applied to power blast air, overcoming a shortage of water power in areas where coal and iron ore were located. This may have happened as early as the 4th century AD. History of ferrous metallurgy Cast iron has been found in China dating to the 5th century BC, but the earliest extant blast furnaces in China date to the 1st century AD and in the West from the High Middle Ages. Bangla sexy bf

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  1. Origin and spread of early modern blast furnaces[ edit ] Period drawing of an 18th-century blast furnace Due to the casting of cannon, the blast furnace came into widespread use in France in the mid 15th century. Foundry work was a minor branch of the industry, but Darby's son built a new furnace at nearby Horsehay, and began to supply the owners of finery forges with coke pig iron for the production of bar iron.

  2. By using the blast furnace, it was possible to produce larger quantities of tools such as ploughshares more efficiently than the bloomery. The use of a coal-derived fuel in the iron industry was a key factor in the British Industrial Revolution. Cast iron from the furnace was used to make girders for the world's first iron bridge in

  3. Within a few years of the introduction, hot blast was developed to the point where fuel consumption was cut by one-third using coke or two-thirds using coal, while furnace capacity was also significantly increased.

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