Agrawal, A (2005) Effluent treatment and by-product recovery from the sludge of an alumina plant. Minerals Engineering, 18 (4). pp. 463-465.
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During the recovery of vanadium pentoxide from vanadium containing sludge of alumina plants, huge amount of effluents containing NH3, P, V and NaCl, is generated. Due to its toxic nature, it can neither be discharged to land or water nor can be stored as such, hence a process has been developed to recover ammonia as salts and vanadium pentoxide to be recycled. Thus on using sulphuric acid, about 75% of ammonia was recovered as ammonium sulphate and while using HCl about 89% of ammonia was obtained as ammoniun chloride. On refluxing calcium vanadate with H2SO4 about 94% of V2O5 is obtained which may be recycled to the main stream of V2O5 plant.
|Uncontrolled Keywords:||Pollution; Recycling; Wasteprocessing; Environmental; Hydrometallurgy|
|Divisions:||Metal Extraction and Forming|
|Deposited By:||INVALID USER|
|Deposited On:||03 Nov 2009 10:19|
|Last Modified:||13 Dec 2011 14:59|
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