A method for recovery of iron,titanium,and vanadium from vanadium-bearing titanomagnetite  

作　　者：Yi-min Zhang Li-na Wang De-sheng Chen Wei-jing Wang Ya-hui Liu Hong-xin Zhao Tao Qi 

机构地区：[1]University of Chinese Academy of Sciences,Beijing 100049,China [2]National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology,Beijing 100190,China [3]Key Laboratory of Green Process and Engineering,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2018年第2期131-144,共14页矿物冶金与材料学报（英文版）

基　　金：financially supported by the National Basic Research Program of China(Nos.2013CB632601 and 2013CB632604);the National Science Foundation for Distinguished Young Scholars of China(Nos.51125018 and 51504230);the Key Research Program of the Chinese Academy of Sciences(No.KGZD-EW-201-2);the National Natural Science Foundation of China(Nos.51374191,21106167,2160624,and 51104139);the Financial Grant from the China Postdoctoral Science Foundation(Nos.2012M510552 and 2013T60175);the Nonprofit Industry Research Subject of Environmental Projection(No.201509053)

摘　　要：An innovative method for recovering valuable elements from vanadium-bearing titanomagnetite is proposed. This method involves two procedures： low-temperature roasting of vanadium-bearing titanomagnetite and water leaching of roasting slag. During the roasting process, the reduction of iron oxides to metallic iron, the sodium oxidation of vanadium oxides to water-soluble sodium vanadate, and the smelting separation of metallic iron and slag were accomplished simultaneously. Optimal roasting conditions for iron/slag separation were achieved with a mixture thickness of 42.5 mm, a roasting temperature of 1200°C, a residence time of 2 h, a molar ratio of C/O of 1.7, and a sodium carbonate addition of 70 wt%, as well as with the use of anthracite as a reductant. Under the optimal conditions, 93.67% iron from the raw ore was recovered in the form of iron nugget with 95.44% iron grade. After a water leaching process, 85.61% of the vanadium from the roasting slag was leached, confirming the sodium oxidation of most of the vanadium oxides to water-soluble sodium vanadate during the roasting process. The total recoveries of iron, vanadium, and titanium were 93.67%, 72.68%, and 99.72%, respectively.An innovative method for recovering valuable elements from vanadium-bearing titanomagnetite is proposed. This method involves two procedures： low-temperature roasting of vanadium-bearing titanomagnetite and water leaching of roasting slag. During the roasting process, the reduction of iron oxides to metallic iron, the sodium oxidation of vanadium oxides to water-soluble sodium vanadate, and the smelting separation of metallic iron and slag were accomplished simultaneously. Optimal roasting conditions for iron/slag separation were achieved with a mixture thickness of 42.5 mm, a roasting temperature of 1200°C, a residence time of 2 h, a molar ratio of C/O of 1.7, and a sodium carbonate addition of 70 wt%, as well as with the use of anthracite as a reductant. Under the optimal conditions, 93.67% iron from the raw ore was recovered in the form of iron nugget with 95.44% iron grade. After a water leaching process, 85.61% of the vanadium from the roasting slag was leached, confirming the sodium oxidation of most of the vanadium oxides to water-soluble sodium vanadate during the roasting process. The total recoveries of iron, vanadium, and titanium were 93.67%, 72.68%, and 99.72%, respectively.

关 键 词：recovery vanadium titanomagnetite direct reduction sodium oxidation smelting separation water leaching 

分 类 号：TD95[矿业工程—选矿]