Influencing Factors and Countermeasures for Vanadium Yield during Ferrovanadium Smelting in Cylinder Furnace

According to the characteristics of ferrovanadium smelting in cylinder furnace and the current state of vanadium recovery for ferrovanadium smelting in the world,the factors influencing the vanadium recovery were systematically analyzed,and the bulk density of vanadium oxides as well as the ramming quality of furnace lining were proposed as the main factors influencing the vanadium recovery for ferrovanadium smelting.From the aspect of process and parameters optimization,the measures for improving vanadium recovery during ferrovanadium smelting were provided which have a guiding significance for technical-economic index improvement for industrial ferrovanadium smelting.And the measures include bulk density of V₂O₃ controlled above 1.0,the mass ratio of V₂O₃ to V₂O₅ kept at 2.0～2.5,more than 60% of magnesia for ramming having 3～8 mm of particle size.Moreover,the roasting process of the furnace is suggested at 500 ℃ for 4 h followed by 900 ℃ for 11 h.The measures also include prolonging the refining time and adopting gradient aluminum addition,etc.After optimization,vanadium recovery rate for ferrovanadium smelting in cylinder furnace increases from 95.5% to 96.4%.