2011•Advanced materials researchRequires access

Kinetics of Leaching Vanadium with Sulfuric Acid from Carbonaceous Shale Containing Vanadium

Yan Liu, Cong Sun, Wei Jun Zhong, Yu Chun Zhai

Abstract

ηA kinetic study of the leaching of stone coal ore with sulfuric acid has been investigated. The effects of the stirring speed, particle sizes of stone coal, acid concentration, leaching temperature and acid-ore ratio on the leaching rate of vanadium were examined. It was found that the leaching rate of vanadium was significantly influenced by leaching temperature. The shrinking core model was applied to the leaching process and the results showed that the process was based on chemical reaction control. And the rate of reaction was expressed as 1-(1-η)1⁄3=4.98×106·e-55488⁄RT·t. The apparent activation energy for the leaching of vanadium⁄ was calculated to be ¾5⁄5.49 kJ/mol using Arrhenius expression.

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Key concepts: Vanadium, Leaching (pedology), Sulfuric acid, Activation energy, Arrhenius equation, Coal, Lixiviant, Chemistry