Before revision: After having favored the spectacular growth of the Lorraine iron and steel industry, the process progressively faded away in front of the Siemens-Martin open hearth , which also used the benefit of basic refractory lining, before disappearing in the mid-1960s: with the development of gas liquefaction , the use of pure oxygen became economically viable.
After revision: After having favored the spectacular growth of the Lorraine iron and steel industry, the process progressively faded away in front of the Siemens-Martin Open-hearth furnaceand the cryogenic separation of O2 from air , which also used the benefit of basic refractory lining, before disappearing in the mid-1960s: with the development of gas liquefaction , the use of pure oxygen became economically viable.