Oxidative Leaching of Vanadium from Vanadium-Chromium Reducing Residue with MnO2

Hao Peng; Liu Yang; Ya Chen; Jing Guo

doi:10.20944/preprints201907.0232.v1

Preprint Article Version 1 This version is not peer-reviewed

Version 1 : Received: 19 July 2019 / Approved: 22 July 2019 / Online: 22 July 2019 (07:46:54 CEST)

This paper focused on the oxidative leaching process of vanadium from vanadium-chromium reducing residue in alkaline medium with MnO₂. The effect of experimental parameters including reaction time, reaction temperature, dosage of MnO₂, dosage of NaOH, and liquid-to-solid ratio on the leaching efficiency of vanadium had been studied. The results indicated that MnO₂ was an efficient oxidant for leaching out of vanadium. The leaching efficiency of vanadium was up to 97.25% under optimal reaction conditions: reaction temperature of 90 ℃, reaction time of 60 min, dosage of MnO₂ at 50 wt.%, concentration of NaOH at 30 wt.% and liquid-to-solid at 5:1 mL/g.

leaching; vanadium; MnO2

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Oxidative Leaching of Vanadium from Vanadium-Chromium Reducing Residue with MnO₂

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