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Definition: The Bessemer Steel Process was a process of producing high-quality steel by shooting air into molten steel to burn off carbon and other impurities. It was named for the British inventor Sir Henry Bessemer, who worked to develop the process in the 1850s.
a Bessemer converter, on display at the Science Museum in London. After patenting the Bessemer Converter in 1856, Bessemer formed the Bessemer Steel Company to both make the steel and to license the process to others. He set up in Sheffield, then the heart of steel country.