Meshram, Pratima and Abhilash, and Kumari, Jyotsna and Pandey, B D (2016) Extraction of vanadium and synthesis of vanadium pentaoxide from Bayer's sludge. Russian Journal Of Non-Ferrous Materials, 57(4) (IF-0.238). pp. 338-346.
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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 90A degrees C.
|Uncontrolled Keywords:||vanadium sludge; aqueous leaching; diffusion controlled model; adsorption; vanadium pentaoxide|
|Divisions:||Metal Extraction and Forming|
|Deposited By:||Sahu A K|
|Deposited On:||16 Aug 2017 11:39|
|Last Modified:||15 Nov 2017 15:54|
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