Abstract Scope |
In this study, vanadium titanomagnetite was processed via a gas-based shaft furnace reduction–electric furnace smelting route. The feasibility of oxide pellet preparation, gas-based reduction, and electric furnace melting was demonstrated. Oxidized pellets showed excellent strength (RDI+3.15 = 98.58%, RSI = 9.72%), meeting first-grade standards. Under 1000°C and PH₂/(PH₂+PCO) = 0.72, reduced pellets achieved 90.6% metallization with acceptable reduction swelling and pulverization indices. Electric furnace smelting at 1550°C without reductant yielded high recoveries of Fe (99.77%), V (99.6%), and Ti (95.58%) at basicity 0.7 and MgO 13.04%. The vanadium pig iron contained 0.683% V, 0.296% Ti, and 0.199% Si, suitable for steelmaking and vanadium slag blowing. The slag had 52.21% TiO2, surpassing the TiO2 content in titanium concentrate, making it a viable feedstock for TiO2 production via the sulfuric acid method. This process demonstrates an efficient pathway for comprehensive utilization of vanadium titanomagnetite resources. |