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Denitrogenation of steel melts with oxygen and sulphur by injection of argon under reduced pressure
Author(s) -
Thoms Andreas,
Tu Shiwei,
Janke Dieter
Publication year - 1997
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.199701172
Subject(s) - argon , oxygen , chemistry , nitrogen , dimensionless quantity , desorption , sulfur , coalescence (physics) , reaction rate constant , bubble , thermodynamics , analytical chemistry (journal) , kinetics , organic chemistry , adsorption , mechanics , physics , quantum mechanics , astrobiology
Denitrogenation of steel melts with oxygen and sulphur was studied under reduced pressure by injection of argon. The rate of nitrogen desorption was found to obey a reaction of second order. The macrokinetic rate increases with increasing Ar flowrate until bubble coalescence occurs in the melts. The effects of sulphur and oxygen on nitrogen desorption were evaluated from the experimental data. The dimensionless rate constant for nitrogen is described by . A reasonable agreement was obtained in comparison with the results of other investigators.