A novel process for the recovery of iron,titanium,and vanadium from vanadium-bearing titanomagnetite:sodium modification–direct reduction coupled process

Yi-min Zhang^1,2,3，Ling-yun Yi^2,3，Li-na Wang^2,3，De-sheng Chen^2,3，Wei-jing Wang^2,3，Ya-hui Liu^2,3，Hong-xin Zhao^2,3，Tao Qi^2,3

1. University of Chinese Academy of Sciences2. National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology3. Key Laboratory of Green Process and Engineering,Institute of Process Engineering,Chinese Academy of Sciences

摘 要：A sodium modification–direct reduction coupled process was proposed for the simultaneous extraction of V and Fe from vanadium-bearing titanomagnetite.The sodium oxidation of vanadium oxides to water-soluble sodium vanadate and the transformation of iron oxides to metallic iron were accomplished in a single-step high-temperature process.The increase in roasting temperature favors the reduction of iron oxides but disfavors the oxidation of vanadium oxides.The recoveries of vanadium,iron,and titanium reached 84.52%,89.37%,and 95.59%,respectively.Moreover,the acid decomposition efficiency of titanium slag reached 96.45%.Compared with traditional processes,the novel process provides several advantages,including a shorter flow,a lower energy consumption,and a higher utilization efficiency of vanadium-bearing titanomagnetite resources.

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