Thomas


Thomas : Also called the Basic Bessemer process. A variation of the Bessemer process for steelmaking, for use with ores rich in phosphorus, in which the converter is lined with calcined dolomite (magnesium and calcium oxides), and limestone is added to the charge; the phosphorus remains with the slag. Invented by the cousins Sidney Gilchrist Thomas and Percy Carlisle Gilchrist (hence the alternative name for the process: Thomas and Gilchrist) in 1877
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