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http://dx.doi.org/10.7844/kirr.2021.30.4.27

Vanadium Leaching Behavior from Domestic Vanadium Bearing Titanomagnetite Ore through CaO Roasting  

Shin, Dong Ju (Resources Recovery Research Center, Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources (KIGAM))
Joo, Sung-Ho (Resources Recovery Research Center, Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources (KIGAM))
Lee, Dongseok (Resources Recovery Research Center, Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources (KIGAM))
Jeon, Ho-Seok (Resources Recovery Research Center, Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources (KIGAM))
Shin, Shun Myung (Resources Recovery Research Center, Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources (KIGAM))
Publication Information
Resources Recycling / v.30, no.4, 2021 , pp. 27-34 More about this Journal
Abstract
In this study, the leaching behavior of vanadium (V) was investigated through CaO roasting and sulfuric acid leaching from domestic V-bearing titanomagnetite (VTM). Changes in the phase according to the amount of CaO added and roasting temperature were analyzed. Regardless of the roasting conditions, perovskite (CaTiO3) was preferred to form. When the CaO content was increased, the calcium ferrite (CaFeOx) phase was formed; otherwise, ferrite (Fe2O3) was preferred. After CaO was roasted, leaching was performed for 6 h with 1M sulfuric acid at 50℃ and a 10% solid-liquid ratio. Results of leaching revealed that when the roasted product was sintered, V was not sufficiently oxidized, and the leaching efficiency decreased. In addition, when the roasting temperature was low, the leaching efficiency of V decreased due to the influence of unreacted excess CaO. To lower the leaching efficiency of iron and titanium in VTM concentrates, suppressing the formation of CaTiO3 and CaFeOx was necessary by minimizing the amount of CaO added. Consequently, a leaching efficiency of 86% V, 4.3% Fe, and 6.5% Ti was obtained when the roasted product of 1150℃ and 10 wt% CaO was leached.
Keywords
vanadium bearing titanomagnetite; CaO roasting; leaching; vanadium;
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