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| Leaching Behaviour of V, Fe, Al during Vanadium Extraction from Stone Coal by Sufuric Acid Leaching |
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Received:February 02, 2016
Revised:February 04, 2016
Accepted:February 06, 2016
Published Online:May 19, 2016
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| DOI：doi：10.3969/j.issn.1007-7545.2016.06.014 |
| KeyWord:stone coal; sulfuric acid leaching; V; Fe; Al; leaching behaviour; thermodynamics |
| Author | Institution |
| LI Dao |
武汉科技大学 资源与环境工程学院 |
| LIU Tao |
武汉科技大学 资源与环境工程学院;;湖北省页岩钒资源高效清洁利用工程技术研究中心;;钒资源高效利用湖北省协同创新中心;钒资源高效利用湖北省协同创新中心 |
| ZHANG Yi-min |
武汉科技大学 资源与环境工程学院 |
| HUANG Jing |
武汉科技大学 资源与环境工程学院 |
| SUN Kun |
武汉科技大学 资源与环境工程学院 |
| WANG Bo |
武汉科技大学 资源与环境工程学院 |
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| Abstract: |
| Leaching behaviours of vanadium, iron and aluminum during vanadium extraction from stone coal were investigated applying decarburization sample of muscovite-type stone coal based on thermodynamics calculation and analysis. The results show that in calcium fluoride and sulfuric acid leaching system, potassium feldspar and hematite would be dissolved accompanied with dissolution of main vanadium-bearing mineral muscovite. The effects of sulfuric acid concentration, leaching temperature, leaching time, and ratio of liquid to solid on leaching rates of vanadium, iron, and aluminum present the same trend. Leaching rate of aluminum is higher than those of vanadium and iron. During vanadium extraction from stone coal decarburization sample, main minerals are sequenced in terms of leaching difficulty as hematite, muscovite, and potassium feldspar. It takes a long time for hematite to reach dissolution balance, while muscovite and potassium feldspar realize dissolution balance in relatively short time. Leaching time can be shortened appropriately on premise of ensuring vanadium leaching to decrease dissolution of iron to the largest extent. |
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