Improvement of the Decarburization Rate in Austenitic Stainless Steelmaking

다국어 초록 (Multilingual Abstract)

In order to enhance the decarburization rate at low carbon content region during the decarburization ofmolten stainless steel in argan oxygen decarburization, inert gas was blown into top slag and molten steelthrough a top lance. The carbon content at the end point of the decarburization process was found to reachlower values than conventional levels without the inert gas top blowing. The decarburization rate might beimproved, probably due to the disturbance of the slag/metal interface and the dilution of CO gas. Theinfluence of slag in decarburization step on the decarburization and the reduction reactions of chromeoxides in the slag were also experimentally and theoretically investigated by establishing a kinetic modelof the decarburization of molten stainless steel under the existence of slag containing chrome oxide. Theliquid fraction of the slag appears to be essential for a more effective decarburization reaction. Countermeasureswere also proposed to prevent carbon pickup from burnt lime for better slag control.

참고문헌 (Reference)

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