期刊
HYDROMETALLURGY
卷 151, 期 -, 页码 51-55出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.hydromet.2014.10.017
关键词
Vanadium slag; Electrochemical; Extraction; NaOH; Sub-molten salt
资金
- National Basic Research Program of China (973 Program) [2013CB632601]
- Program of the National Natural Science Foundation [51274178, 51274179]
- Major Program of the Chinese Academy of Sciences [KGCX2-EW-215]
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 40 wt.%, reaction temperature of 120 degrees C, alkali-to-ore mass ratio of 4:1, stirring speed of 1000 rpm, and slot current density of 750 A/m(2)), the extraction percentages of vanadium and chromium could reach approximately 95% and 90%, respectively, after 6 h of reaction time. Compared with the current liquid oxidation methods, the reaction temperature in this new approach is reduced by 60-280 degrees C and the medium concentration is decreased by more than 30%, demonstrating substantial advantages and prospects in terms of actual operation and industrial application. (C) 2014 Elsevier B.V. All rights reserved.
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