Youngjae Kim, Kyungsob Choi, Hyunsik Park, K. Chung
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Thermodynamic Evaluation of Sulfate-Roasting Process for the Vanadium Extraction from Korean VTM Ore
In the present study, the thermodynamic evaluation of the sulfate-roasting process was conducted to extract vanadium from the Korean vanadium titano-magnetite ore. The leaching efficiency of vanadium and other impurities was analyzed for varying roasting temperatures and addition of Na 2 SO 4 . In the case of sulfate roasting, the roasting temperature was 200 ℃ higher than that previously observed Na 2 CO 3 roasting. However, the higher leaching efficiency of vanadium and lower leaching efficiency of other impurities, such as aluminum and silicon, were observed. The high selectivity for the extraction of vanadium in sulfate roasting would result from the reaction mechanism between SO 2 gas and vanadium concentrate.
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