Abstract
A novel method that introduces an electrochemical field to enhance the decomposition of vanadium slag in concentrated NaOH solution was proposed. Under the optimal conditions (alkali concentration of 40wt.%, reaction temperature of 120°C, alkali-to-ore mass ratio of 4:1, stirring speed of 1000rpm, and slot current density of 750A/m2), the extraction percentages of vanadium and chromium could reach approximately 95% and 90%, respectively, after 6h of reaction time. Compared with the current liquid oxidation methods, the reaction temperature in this new approach is reduced by 60–280°C and the medium concentration is decreased by more than 30%, demonstrating substantial advantages and prospects in terms of actual operation and industrial application.
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