Acid leaching of vanadium from roasted residue of stone coal
来源期刊：中国有色金属学报(英文版)2010年增刊第1期
论文作者：朱阳戈 张国范 冯其明 卢毅屏 欧乐明 黄思捷
文章页码：107 - 111
Key words：stone coal; roasting; acid leaching; vanadium
Abstract: 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 ℃ and leaching time of 8 h were necessary reaction factors. The results show that after a roasting treatment at the optimum condition of 950 ℃ at 1 h, 76.88% vanadium can be leached under the experimental condition of 0.45% of H2SO4, 30 ℃ 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.
基金信息：the National Natural Science of China
the Opening Foundation of Key Laboratory of Solid Waste Treatment and Resource Recycle (SWUST), Ministry of Education, China
