Si、Al还原渣中V_2O_5反应动力学研究

Experimental Research on Reaction Kinetics of Reducing V_2O_5 from Slag by Si and Al

为采用V2O5直接合金化冶炼高速钢,进行了渣中Si、Al还原渣中V2O5反应动力学试验,考察了温度、熔渣组成等因素对还原反应速度的影响,并对反应机理进行探索,找出还原反应速度的限制环节。试验结果表明,渣中V2O5向反应界面的扩散是速度限制环节。通过动力学试验研究结果最终确定V2O5直接合金化的工艺路线是:Si预还原→Al终还原。

In order to produce high speed steel with V2O5 by direct alloying,reaction kinetic test of reducing V2O5 from slag by Si and Al was conducted to study the influence of temperature and slag composition on reduction rate,and reaction mechanism was investigated to identify the limiting factors to reduction rate.Experimental results showed that the diffusion of V2O5 in slag to reaction interface was the crucial factor to reduction rate.Through dynamic experimental research,the finally established route of V2O5 direct alloying process was： prereduction with silicon and final reduction with aluminum.