Vanadium extraction from vanadium-bearing titanomagnetite by selective chlorination using chloride wastes (FeCl_x)

Abstract

Vanadium extraction of vanadium-bearing titanomagnetite was investigated by selective chlorination. Thermodynamics analyses on the interactive reactions among related species in the system were made before the experiments. Some fundamental experiments for extracting vanadium by FeCl_x as chlorinating agent were conducted over the temperature range of 900-1300 K under air or oxygen atmosphere. The results show that vanadium can be extracted by the selective chlorination, using FeCl_x, based on thermodynamic analysis and experiment. Vanadium extraction ratio first increases with the increase of temperature, and then decreases with the increase of temperature over the range of 900-1300 K under air or oxygen atmosphere. The higher molar ratio of FeCl₃ to oxides (n_chl:n_oxd) reacting with FeCl₃, the higher ratio of vanadium extraction. Under oxygen atmosphere, the vanadium extraction ratio is up to 32% at 1100 K for 2 h by using FeCl₃ as chlorinating agent.

Keywords

vanadium-bearing titanomagnetite / vanadium extraction / selective chlorination / thermodynamic analysis / chloride wastes

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