Experimental Study On New Process Of Metallization Reduction-Separation For Vanadium-titanium Magnetite

As is known to us all,.V and Ti are important strategic resources. They are material guarantee of national economic development and state security, widely used in metallurgy chemical, aerospace, national defense and military, etc. Vanadium-titanium magnetite as important carrier vanadium titanium resources, spread throughout PanXi, Chengteh, HanZhong, XiangYang, etc. Possible ore is abundant, only in Panxi region there is more than10billion ton. Owing to its "lean""fine""scattered" and "complex" characteristics, in traditional smelting blast furnace the rate of multipurpose utilization of Fe V Ti in the ore is very low, which causes serious wasting of resources and environmental pollution.Considering core problem of low resource utilization and serious environmental burden, the new process metallized reduction-separation of vanadium titano-magnetite was proposed. The chemical composition, things phase composition, mineral distribution were analyzed by means of material characteristics analysis. According to raw material characteristics, experimental study on new process was established. How magnetic field intensity, reduction temperature, reduction time, FC/O (mole ratio), reduction coal particle size affect new process index in this experiment was studied. Smelting separation was done to the product of dressing in high temperature carbon nanotube furnace. Compared with blast furnace process, the feasibility of new process was studied. By this study, the following conclusions can be gained:(1) Vanadium titano-magnetite is mainly made up of ilmenite and titanomagnetite, etc. The structre of mineralogical is very complicated. The particle is fine. The effective segregation of iron and vanadium and titanium cannot be easily realized by conventional method.(2) Metallized reduction-separation can efficiently realize comprehensive utilization of the Fe, V, Ti and gain high grade containing vanadium iron powder, rich titanium slag. When FC/O (mole ratio) is1.0, the particle of reduction coal is-75μm, the reduction temperature is1350℃, the reduction time is60min, magnetic field intensity is50mT, the excellent index can be gained:the Fe grade of dressing product is86.56%, the metallization is96.18%, the yield of iron also reaches97.48%, the yield of V reaches75.68%, besides the grade and yield of TiO2is55.39%and80.08%separately in tailings.(3) The product of dressing is the containing vanadium iron powder with high metallization, after low carbon electric heating and smelting separation, high grade iron and vanadium slag can be gained, which realize the effective separation of Fe V. In this process, the yield of Fe is95.07%, the yield of V is71.6%.(4) The changing course of iron phase is:Fe2O3â†'Fe3O4â†'FeOâ†'Fe; Fe2TiO5â†'Fe2TiO4â†'FeTiO3â†'FeTi2O5in the carbon-thermal reduction of vanadium-titanium magnetite.