Secondary leaching of vanadium from vanadium tailing intensified with CaF2

2018 International Conference on Construction, Aviation and Environmental Engineering

生态环境科学;生物科学

Peng, Hao^1 ; Zhou, Yuju^1 ; Li, Xianbin^1 ; Yang, Liu^1 ; Leng, Yumeng^1 ; Guo, Jiang^1 ; Zhao, Hengxin^1

College of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing, China^1

关键词: Leaching process;    Liquid to solid ratio;    Metasilicate;    Optimal conditions;    Reaction temperature;    Residual content;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/233/4/042048/pdf
DOI  :  10.1088/1755-1315/233/4/042048

来源: IOP

【 摘 要 】

Vanadium in the vanadium tailing existed in different valence wrapped by metasilicate was difficult to leach out. CaF2 was added to intensify the leaching process, which was aimed at destroying the metasilicate and releasing vanadium out to achieve high leaching efficiency and low residual content in the tailing. The parameters were studied. Results showed that CaF2 could destroy the metasilicate and exposed vanadium out, which was beneficial for vanadium leaching. The vanadium in the vanadium tailing could be secondary leaching out and the residual content of vanadium was decreased to 0.84 wt. % under the optimal conditions: concentration of sulfur acid of 50 wt. %, reaction temperature of 90 °C, reaction time of 150 min, liquid-to-solid ratio of 5.0 mL/g, and addition of CaF2 at 10 wt. %.