Leaching Characteristics of Vanadium with Assistant in Sulfuric Acid from Titano-Magnetite
- DOI
- 10.2991/icsd-16.2017.27How to use a DOI?
- Keywords
- Vanadium; Kinetics; Calcium fluoride; Acid leaching; Titano-magnetite
- Abstract
The recovery of vanadium with calcium fluoride in sulfuric acid medium was put forward from vanadium titano-magnetite in order to enhance the leaching efficiency of vanadium and reduce the environmental pollution. The main factors, leaching mechanism and kinetics analysis of vanadium from vanadium titano-magnetite concentrate were deeply investigated. The results show that the calcium fluoride could obviously increase the recovery of vanadium and enhance leaching efficiency. The recovery of vanadium was increased from 75% to 92% with 6% calcium fluoride. The calcium fluoride could promote the dissolution of SiO2 and the generation of H2SiF6, which may easily destroy the crystal lattice of magnetite and dissolve the vanadium. The particles of vanadium titano-magnetite were smaller and multihole with calcium fluoride after the acid leaching process. The leaching kinetics could be expressed by the SCM in the process. The apparent rate constant was increased from 0.0017 to 0.0031 with 6% calcium fluoride at 100 oC, where the apparent activation energy (Ea) of vanadium leaching has been decreased from 36.05 KJ/mol to 22.17 KJ/mol.
- Copyright
- © 2017, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Xiao-Bo Zhu AU - Wang Li AU - Wen-Zhong Li AU - Shen Tang PY - 2016/12 DA - 2016/12 TI - Leaching Characteristics of Vanadium with Assistant in Sulfuric Acid from Titano-Magnetite BT - Proceedings of the 2nd 2016 International Conference on Sustainable Development (ICSD 2016) PB - Atlantis Press SP - 130 EP - 135 SN - 2352-5401 UR - https://doi.org/10.2991/icsd-16.2017.27 DO - 10.2991/icsd-16.2017.27 ID - Zhu2016/12 ER -