The Gilchrist-Thomas process ( or " basic Bessemer process " ) was an improvement to the Bessemer process, made by lining the converter with a basic material to remove phosphorus.
2.
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.
3.
Finally, the basic oxygen process was introduced at the Voest-Alpine works in 1952; a modification of the basic Bessemer process, it lances oxygen from above the steel ( instead of bubbling air from below ), reducing the amount of nitrogen uptake into the steel.
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