The application of CO_(2)in the steelmaking process has yielded promising results,demonstrating a certain capability for nitrogen removal.To accurately determine the kinetic parameters of nitrogen reactions at the iro...The application of CO_(2)in the steelmaking process has yielded promising results,demonstrating a certain capability for nitrogen removal.To accurately determine the kinetic parameters of nitrogen reactions at the iron melt interface under CO_(2)injection conditions,an isotope exchange technique was employed.This technique was used to monitor the evolution of the nitrogen isotopic composition during the reaction between a^(28)N_(2)–^(30)N_(2)–CO_(2)–CO–Ar gas mixture and an iron melt of controlled composition.The kinetic parameters of nitrogen were subsequently calculated for various CO_(2)/CO ratios.Furthermore,the dissociation rate determining model was applied to establish the relationship between the interfacial reaction rate constant(kc)and the activity of surfactive elements(O,C,and S)in molten iron(aO,aC,and aS),expressed as k_(c)=4.35×10^(-6)/(1+14.25_(aO)+0.25_(aC)+6.50_(aS))^(2).展开更多
基金financially supported by the National Natural Science Foundation of China(Nos.52293392 and 51474019).
文摘The application of CO_(2)in the steelmaking process has yielded promising results,demonstrating a certain capability for nitrogen removal.To accurately determine the kinetic parameters of nitrogen reactions at the iron melt interface under CO_(2)injection conditions,an isotope exchange technique was employed.This technique was used to monitor the evolution of the nitrogen isotopic composition during the reaction between a^(28)N_(2)–^(30)N_(2)–CO_(2)–CO–Ar gas mixture and an iron melt of controlled composition.The kinetic parameters of nitrogen were subsequently calculated for various CO_(2)/CO ratios.Furthermore,the dissociation rate determining model was applied to establish the relationship between the interfacial reaction rate constant(kc)and the activity of surfactive elements(O,C,and S)in molten iron(aO,aC,and aS),expressed as k_(c)=4.35×10^(-6)/(1+14.25_(aO)+0.25_(aC)+6.50_(aS))^(2).
