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.
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机译：通过直接从渣中浸出并进行焙烧处理后浸出，分别进行了发电煤渣中硫浸出钒的实验研究。影响钒浸出的因素有硫酸浓度，浸出等。研究了两种工艺的温度，浸出时间和液固比。在直接浸出过程中，浸出率达到74.49％，H2SO4浓度可达5.4％，浸出温度为90℃，浸出时间为90％。 8 h是必要的反应因子。结果表明，在950℃的最佳条件下焙烧处理1 h后，在0.45％的H2SO4的条件下，30℃的液体浸出76.88％钒即可。固比为2 mL / g。氧化焙烧处理后的浸出是一种从石煤残渣中浸出钒的有效方法，具有回收率高，经济成本低等优点。并减少浸出溶液中的杂质。
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