Theoretical Analysis on Use of V-Ti Magnetite in a New Route

The feasibility of resources comprehensive recycling from V-Ti magnetite by sodium alkali reaction and carbothermic reduction in one-step was discussed through thermodynamics analysis. Based on the calculation,rational process route was proposed,and corresponding measurements were put forward to improve the product qualities of vanadium and titanium. The calculation results show that,the treatment of V-Ti magnetite by sodium alkali reaction in range of 850 ~ 1 155 ℃ and deep reduction below 1 400 ℃ is rational. Meanwhile,the addition of sodium salt is favorable for the reduction of iron bearing minerals,and the carbon enhances the sodium reaction. The impurity content in leaching liquid decreases and the quality of V-Ti product is improved greatly via controlling the ratio of aluminum to silicon,and how to realize the separation between vanadium and titanium is the direction of future efforts. When the sodium agent is cycled in the form of NaOH solution and NaHCO₃,the evaporation process is avoided,and the energy consumption can be greatly reduced.