REDUCTION KINETICS OF V₂O₅ AND VANADIUM DIFFUSION IN MOLTEN IRON DURING SMELTING V-BEARING TITANIFEROUS MAGNFTITE

The diffusion of vanadium in molten iron and V₂O₅ reduction kinetics are the key factors affecting V₂O₅ reduction and recovery of vanadium during smelting vanadium-bearing titaniferous magnetite. In this paper,diffusion and kinetics features of vanadium,influence of temperature and titanium in molten iron on vanadium diffusion and interaction of vanadium and titanium diffusion have been examined. Additionally,the kinetics of V₂O₅ reduction and rate controlling step to smelting V-bearing titaniferous magnetite are also investigated. It is shown that the diffusion coeffcient increases with temperature,and increasing titanium content in molten iron will promote the diffusion ability of vanadium. However,titanium diffusion decreases as vanadium concentration increases. The kinetics feature of V₂O₅ reduction is that the diffusion of vnandium in molten iron is rate controlling step.