溶鋼の脱水素速度に及ぼす圧力,ガス吹き付けの影響

概要

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The rate of hydrogen desorption from liquid steel bath was measured to investigate the effect of pressure. Experiments of hydrogen desorption from molten steel were conducted using 30kg and 100kg scale induction furnace. Hydrogen desorption reaction was basically controlled by gas phase mass transfer over 1.4 kPa in this experimental condition. The effect of argon gas top blowing on to the free surface of molten steeel bath on the gas phase mass transfer coefficient was evaluated. Following dimensionless equation was obtained assuming 0.33 power of Sc. [numerical formula] where H is the distance between free surface of melt bath and nozzle, d_n is inner diameter of nozzle, dc is inner diameter of crucible, [numerical formula] is mass transfer coefficient of gas phase, D_<Ar-X> is diffasion coefficient of diffusing gas, u_g is gas velocity, Vg is kinetic viscosity of gas.
社団法人日本鉄鋼協会の論文