Journal
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
Volume 20, Issue -, Pages S107-S111Publisher
ELSEVIER
DOI: 10.1016/S1003-6326(10)60022-2
Keywords
stone coal; roasting; acid leaching; vanadium
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Funding
- National Natural Science of China [50974133]
- Opening Foundation of Key Laboratory of Solid Waste Treatment and Resource Recycle (SWUST), Ministry of Education, China [08zxgk06]
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Through leaching from residue directly and leaching after a roasting treatment, respectively, the experimental research on sulfuric leaching of vanadium from residue of stone coal that came from power generation was conducted. Factors which influence the leaching of vanadium such as concentration of sulfuric acid, leaching temperature, leaching time and liquid-to-solid ratio were investigated in both processes. In the process of direct leaching, to achieve a leaching rate of 74.49%, H2SO4 concentration of up to 5.4%, leaching temperature of 90 degrees C and leaching time of 8 h were necessary reaction factors. The results show that after a roasting treatment at the optimum condition of 950 degrees C at 1 h, 76.88% vanadium can be leached under the experimental condition of 0.45% of H2SO4, 30 degrees C for 1 h with a liquid-to-solid ratio of 2 mL/g. Leaching after an oxidation roasting treatment is an efficient way to leach vanadium from the residue of stone coal, which has some advantages, such as high recovery, low economic cost and less impurities in leaching solution.
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