期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：233
期号：4
页码：042048
DOI：10.1088/1755-1315/233/4/042048
出版社：IOP Publishing
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. %.
