The nitrogen removal from 0. 02% C molten steel in argon direct current (DC) glow plasma has been tested by a 25 kg vacuum induction furnace and the effect of argon glow plasma on kinetics of nitrogen removal from molten steel was studied. Results showed that the nitrogen removal speed and efficiency from molten steel in argon glow plasma were obviously better than that in vacuum
as oxygen content in molten steel was 180 x 10
-6
in argon glow plasma the nitrogen content in molten steel could decrease to 9 x 10
-6
. The effect of argon glow plasma on nitrogen removal from molten steel was embodied in interface chemical reaction to provide the kinetics condition for accelerating nitrogen removal reaction.