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| Pilot test on extraction of vanadium from stone coal by direct sulfuric acid leaching |
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Received:January 16, 2013
Revised:January 24, 2013
Accepted:January 29, 2013
Published Online:December 21, 2013
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| DOI： |
| KeyWord:stone;coal, vanadium, sulfuric;acid leaching, extraction, pilot;test |
| Author | Institution |
| Liu Da-xue |
Beijing General Research Institute of Mining and Metallurgy |
| li yan jiang |
BGRIMM |
| chang yao chao |
BGRIMM |
| wang yun |
BGRIMM |
| yuan chao xin |
BGRIMM |
| guo chi hao |
BGRIMM |
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| Abstract: |
| Using the new process of direct sulfuric acid leaching with leaching aid, pilot test on extraction of vanadium from stone coal with the capacity of 1.2t/d was performed. Results showed that under following optimum conditions: two stage leaching with the first stage temperature of ambient, leaching time of 1.5h and the second stage temperature of 900℃ and leaching time of 8h, concentrated sulfuric acid addition of 25%, leaching aid addition of 2.5%, a desirable leaching effect can be obtained with the vanadium leaching rate maintaining around 86%; As to the solvent extraction circuit, 6 stages of extraction, 1 stage of washing, 4 stages of vanadium stripping and 2 stages of iron stripping were adopted. The extraction rate of vanadium was above 99% and stripping rate 98.6%; extraction rate of main impurities of iron and aluminum were 2~3% and 12~15%, respectively. |
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