Full-process analysis on volatilizing gold, zinc by chlorination roasting and synchronous recovery vanadium by water leaching of carbonaceous gold ore

Wu, Hao; WANG, Hongjun; DUAN, Siyu; LI, Haoran; HE, Qiusheng

doi:10.1016/j.mineng.2022.107682

Cited by 9 publications

(2 citation statements)

References 36 publications

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“…Unlike their hydrometallurgical counterparts, chlorination-based processes offered the benefits of simplicity, low pollution, low cost, and high selectivity [25][26][27][28][29][30][31][32], and the preparation of V 2 O 5 from vanadium-containing raw materials with chlorinating agents is therefore drawing much attention [33]. Chlorination is typically performed using Cl 2 , and the resulting VOCl 3 (purity ≥ 99.9%) reacts with NH 3 •H 2 O in an aqueous medium to afford precipitates that are subsequently converted into V 2 O 5 [34][35][36].…”

Section: Introductionmentioning

confidence: 99%

“…Further purification of the collected chlorinated products resulted in the production of VOCl 3 with a purity higher than 99.99%. Wu et al [27] proposed a method of recovering vanadium from carbonaceous gold ores based on the use of NaCl as a chlorinating agent to separate vanadium, gold, zinc, and iron. However, the temperature of the suggested chlorination reaction is as high as 800 • C. Further, we found that VOCl 3 can be prepared below 200 • C when AlCl 3 is used as a chlorinating agent.…”

Section: Introductionmentioning

confidence: 99%

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Short-Process Preparation of High-Purity V2O5 from Shale Acid Leaching Solution via Chlorination

Huang

Zhang

et al. 2023

Processes

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The conventional V2O5 preparation processes include ion exchange, chemical precipitation, solvent extraction, and other processes. Given the long process and complex operation nature of traditional V2O5 production methods, we herein developed a short-process, low-temperature, and convenient operation method of isolating vanadium (in the form of V2O5) from shale acid leaching solution. The acid leaching solution was oxidized with NaClO3 and pH-adjusted with NaOH to form a vanadium-containing precipitate, which was mixed with AlCl3 (V:AlCl3 = 1:5, mol/mol) and roasted for 120 min at 170 °C to afford vanadium oxytrichloride (VOCl3) with a purity of 99.59%. In addition, the vanadium-containing precipitate was mixed with AlCl3 and NaCl (V:AlCl3:NaCl = 3:12:8, mol/mol/mol) and roasted for 120 min at 170 °C to afford VOCl3 with a purity of 99.94%. VOCl3 (purity of 99.94%) was dissolved in ultrapure water, and the solution (32 gvanadium/L) was treated with NH3·H2O (NH3:V = 1.34, mol/mol) at 50 °C for 120 min. The obtained precipitate (vanadium precipitation rate = 99.28%) was roasted at 550 °C for 3 h to afford high-purity vanadium pentoxide (V2O5) with a purity of 99.86%. Compared with the traditional hydrometallurgical method of V2O5 preparation, our method avoided solvent extraction and other undesired processes and the overall process flow is greatly shortened, thus having high practical value.

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