含MnO钛渣中氧化钒还原能力的研究
STUDY ON REDUCTION OF VANADIUM OXIDE IN THE TITANIA SLAG CONTAINING MnO
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摘要: 对配加0~5%MnO钛渣中氧化钒的还原能力进行了研究.结果表明:Si-V耦合反应的显平衡常数随渣中MnO初始含量增加而增加,随TiO2初始含量的增加而减少,随炉渣碱度的升高而升高,但高碱度炉渣会降低见平衡常数值。高炉内氧化钒还原反应设有达到平衡。氧化钒还原受动力学条件控制,还原反应为二级,表现活化能为172kJ/mol。还原初期还原速度受渣中V3+扩散控制,当Si-V耦合反应达到平衡后还原速率受SiO2还原速率控制。同时还指出了提高钒还原率的措施。Abstract: Study on reduction of vanadium oxide in titania slag containing 0~5% MnO. The results of experiment show that the apparent equilibrium constant (IgKsi-v) of Si-V increases with increasing initial MnO,and decrease with increasing initial TiO2,with increasing slag basicity when R >1. 2. The reduction reaction of vanadium oxide can't reach equilibrium in the blast furnace. The reduction of vanadium oxide is restricted by dynamic condition. Reduction reaction is one of two steps. The apparent activation energy is equal to 172 kJ/mol. The reduction rate of vanadium oxide is restricted by V3+ diffusion in slag during initial reduction. But it is restricted by SiO2 reductionrate when Si-V coupled reaction has reached equibrium. Some measures of increasing the reduction rate of vanadium oxide were pointed out.
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