Preparation of Ti Rich Materials with Low Ca and Mg by Carbothermal Reduction of Ilmenite

Using the ilmenite with high calcium and magnesium as the raw material,titanium rich material with low calcium and magnesium was prepared via carbothermal reduction followed by leaching process in the laboratory.XRD analysis of the reduced ilmenite shows that calcium exists in silicate phases of the reduced ilmenite,and magnesium and titanium form a solid solution of anosovite.The leaching test shows that calcium in the reduced ilmenite can be leached efficiently by hydrochloric acid,with the magnesium remaining in the solid solution.The leaching efficiency of magnesium can be improved significantly by adding boric acid in the carbothermal reduction process.Through the proposed process,titanium rich material with 0.13% of CaO and 1.12% of MgO can be obtained.