![]() ![]() This process was first described by the prolific scholar and polymath government official Shen Kuo (1031–1095) in 1075, when he visited Cizhou. Wertime have described the method as a predecessor to the Bessemer process of making steel. Sinologist Joseph Needham and historian of metallurgy Theodore A. Economic historian Robert Hartwell writes that the Chinese of the Song Dynasty (960–1279 CE) innovated a "partial decarbonization" method of repeated forging of cast iron under a cold blast. Early history Ī system akin to the Bessemer process has existed since the 11th century in East Asia. The process using a basic refractory lining is known as the "basic Bessemer process" or Gilchrist–Thomas process after the English discoverers Percy Gilchrist and Sidney Gilchrist Thomas.īessemer converter, Kelham Island Museum, Sheffield, England (2010). The process was said to be independently discovered in 1851 by the American inventor William Kelly though the claim is controversial. ![]() The modern process is named after its inventor, the Englishman Henry Bessemer, who took out a patent on the process in 1856. In the 17th century, accounts by European travelers detailed its possible use by the Japanese. One such process (similar to puddling) was known in the 11th century in East Asia, where the scholar Shen Kuo of that era described its use in the Chinese iron and steel industry. ![]() ![]() Related decarburizing with air processes had been used outside Europe for hundreds of years, but not on an industrial scale. The oxidation also raises the temperature of the iron mass and keeps it molten. The key principle is removal of impurities from the iron by oxidation with air being blown through the molten iron. The Bessemer process was the first inexpensive industrial process for the mass production of steel from molten pig iron before the development of the open hearth furnace. ![]()
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