无盐焙烧-稀酸浸出提钒工艺研究

Study on the Vanadium Extraction Process of Salt-free Roasting-dilute Acid Extraction

文章重点研究了采用无盐焙烧-稀酸浸出提钒工艺从石煤钒矿中提取V_(2)O_(5),考察了焙烧温度、焙烧时间、硫酸用量、浸出温度、浸出时间对提钒率的影响。结果表明,石煤钒矿浸出的最佳条件是:焙烧时间为24 h,焙烧温度为850℃,浸出液固比为2 mL∶1 g,浸出温度为25℃,浸出时间为1 h,硫酸浓度为2.0%~2.5%,浸出液pH=2.0~2.5,V_(2)O_(5)收率为85%~90%.

This paper focuses on the study of salt-free roasting-dilute acid extraction and vanadium extraction process,and examines the influence of roasting temperature,baking time,sulfuric acid dosage,leaching temperature and leaching time on the vanadium extraction rate.The results show that the best conditions for coal coal vanadium extraction are:24 h,850℃,immersion liquid-solid ratio of 2 mL∶1 g,25℃,1 h,2.0%~2.5%,pH=2.0~2.5,and V_(2)O_(5) yield of 85%~90%.