Experimental study on precipitation of ammonium metavanadate in NaVO<sub>3</sub>-H<sub>2</sub>O system by ammonium bicarbonate and ammonium carbonate

Rao Yuzhong; Fu Zibi

doi:10.7513/j.issn.1004-7638.2022.06.002

Volume 43 Issue 6

Jan. 2023

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Rao Yuzhong, Fu Zibi. Experimental study on precipitation of ammonium metavanadate in NaVO3-H2O system by ammonium bicarbonate and ammonium carbonate[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(6): 7-13. doi: 10.7513/j.issn.1004-7638.2022.06.002

Citation:

Rao Yuzhong, Fu Zibi. Experimental study on precipitation of ammonium metavanadate in NaVO₃-H₂O system by ammonium bicarbonate and ammonium carbonate[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(6): 7-13. doi: 10.7513/j.issn.1004-7638.2022.06.002

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Experimental study on precipitation of ammonium metavanadate in NaVO₃-H₂O system by ammonium bicarbonate and ammonium carbonate

doi: 10.7513/j.issn.1004-7638.2022.06.002

State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Pangang Group Research Institute Co., Ltd., Panzhihua 617000, Sichuan, China

Received Date: 2022-07-27
Publish Date: 2023-01-13

Abstract

Abstract

For the NaVO₃-H₂O solution system obtained by extracting vanadium from vanadium slag by sodium method, the effects of precipitation pH value, precipitation temperature, crystallization time, ammonium addition coefficient on the crystallization of ammonium metavanadate were investigated using ammonium bicarbonate and ammonium carbonate as ammonium salt. The results show that the crystallization rate of ammonium metavanadate can be improved by increasing the pH value of the solution (9.1–9.5) in a certain range. Under the conditions of temperature 15–27 ℃, crystallization time >3 h and ammonium addition coefficient no less than 2.9, the crystallization rate of ammonium metavanadate is higher than 85%, and the purity of vanadium pentoxide obtained by calcination ammonium metavanadate is higher than 99.3%, meeting the requirements of YB/T 5304—2017 quality standard.
- extracting vanadium,
- NaVO₃-H₂O solution,
- ammonium carbonate,
- ammonium bicarbonate,
- ammonium metavanadate,
- vanadium precipitation rate

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References(14)

References

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