研究了真空感应熔炼过程铀熔体中Fe元素挥发的动力学规律,结果表明熔体中[Fe]=Fe(g)反应为一级反应,反应的表观活化能约121 k J/mol,挥发过程受熔体中Fe在液相边界层中扩散和液/气界面化学反应共同控制,但溶质扩散影响更大,1673和1853 K温度下挥发反应的传质系数分别为4.52×10~(-4)和1.01×10~(-3) cm/s。 The kinetics of the volatilization of Fe in the melt during vacuum induction melting was studied. The results show that the reaction of [Fe] = Fe (g) in the melt is the first order reaction and the apparent activation energy is about 121 kJ / mol. The volatilization process is controlled by the diffusion of Fe in the liquid phase and the chemical reaction at the liquid / gas interface, but the diffusion of solute is more affected. The mass transfer coefficients of volatilization at 1673 and 1853 K are 4.52 × 10 ~ -4) and 1.01 × 10 -3 cm / s.