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Metal Mine ›› 2015, Vol. 44 ›› Issue (05): 101-104.

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Effect of Roasting Mode on Vanadium Extraction from Stone Coal

Huang Xianbao1,2,Chen Tiejun1,2,Zhang Yimin1,2,Ma Hao1,2,Su Tao1,2,Liu Juan1,2   

  1. 1.College of Resources and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;2.Hubei Provincial Engineering Technology Research Center of High Efficient Cleaning Utilization for Shale Vanadium Resource,Wuhan 430081,China
  • Online:2015-05-15 Published:2015-08-04

Abstract: A stone coal from Hubei Province contains 0.72% V2O5.The vanadium mainly occurs in aluminum silicate minerals like muscovite.In order to efficiently extract the vanadium from stone coal with low energy consumption,comparison tests of fluidized roasting & static roasting were conducted on the ore,with particle size from 0.45 to 1 mm.The results indicated that,fluidized roasting can obtain ideal index in low roasting temperature with short time.The leaching rate of vanadium is 83.52% when fluidized roasting at 750 ℃ for 15 min and is 74.93% when static roasting at 800 ℃ for 60 min.XRD and SEM analysis of roasted products showed that main reason for better performance of vanadium extraction by roasting is that roasting can destroy the structure of muscovite,liberate the vanadium from white mica crystal lattice,and make it possible on acid leaching liquid get into the interior of muscovite and make extraction more easily.Therefore,fluidized roasting can highly improve vanadium extraction effect with low consumption.

Key words: Fluidized roasting, Static roasting, Stone coal, Vanadium extraction