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Russian Journal of Non-Ferrous Metals

, Volume 57, Issue 4, pp 338–346 | Cite as

Extraction of vanadium and synthesis of vanadium pentaoxide from Bayer’s sludge

  • Pratima Meshram
  • Abhilash
  • Jyotsna Kumari
  • B. D. Pandey
Metallurgy of Rare and Noble Metals
  • 46 Downloads

Abstract

Wastes generated from the Bayer’s process serve as valuable resources for aluminum, vanadium, gallium, etc. This work aims to develop a environmentally acceptable and low-cost chemical leaching-cumpurification method for the recovery of vanadium sludge of Indian alumina plant (10–12% V2O5) and synthesize vanadium pentaoxide. The efficiency of leaching was evaluated by various lixiviants like acidified water, H2SO4, soda and NaOH against variation in pulp density and temperature. Maximum extraction (96%) vanadium was achieved using acidified water leaching at above ambient temperature in 1 h with 200 g/L pulp density following diffusion control model. Finally, the vanadium rich leach liquor was purified by steps of adsorption/precipitation etc., to remove with iron and silica to get vanadium pentaoxide. A high purity product of 99% V2O5 was obtained by allowing the adsorption at acidic pH followed by desorption and precipitation at 90°C.

Keywords

vanadium sludge aqueous leaching diffusion controlled model adsorption vanadium pentaoxide 

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Copyright information

© Allerton Press, Inc. 2016

Authors and Affiliations

  • Pratima Meshram
    • 1
  • Abhilash
  • Jyotsna Kumari
    • 1
  • B. D. Pandey
    • 1
  1. 1.CSIR-National Metallurgical LaboratoryJamshedpurIndia

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