Preparation Of High-Titanium Ferroalloy By Electrochemical Reduction Of High Titanium Slag In Molten Salt

The reserves of ilmenite is rich in China and there are many factors influenced existing high titanium ferroalloy production process such as high energy consumption, cost. In this paper, the electrochemical reduction of high titanium slag to high titanium ferroalloy in CaCl2-NaCl eutectic molten at 900℃has been performed. The next step will be electrochemical reduction of ilmenite to ferrotitanium alloy with the FFC process and eventually achieve the goal, which is utilization of ilmenite resources low-cost and low power.Titanium-iron complex oxide is electrolyzed to prepare FeTi alloy in molten salts. The study on sintering temperatures of cathode pellets shows that it is good for removing oxygen from the pellets when temperature range from 840 to 900℃. According to the results of partially reduced samples, including XRD, SEM, EDS, it is found that first deoxidize product is iron, then titanium reduction process include some mesophases, like CaTiO3, Ca3(Ti2O7), and Ti3O, finally titanium and iron will form alloy.Based on the electrolysis of titanium-iron complex oxide, high titanium slag, which treated by different processes, is electrolyzed to obtain high-titanium ferroalloy with the FFC process. The results reveal that there is small amount of intermediate, such as CaTiO3, and impurities such as Mg, Si, Al and O staying in the electrolysis product. The product, which main phase is titanium, can be prepared by electrolysis of high titanium dealt with alkali fusion and acid leaching.