含钒石煤氧压酸浸提钒新工艺研究

Research on New Process of Vanadium Extraction from Vanadium Containing Stone Coal by Acid Leaching under Oxygen Pressure

介绍了含钒石煤氧压酸浸提钒新工艺的研究情况。考察了浸出时间、浸出温度、浸出剂浓度、浸出液固比、矿石粒度、添加剂用量对浸出率的影响，研究表明在浸出时间3～4h、浸出温度150℃、硫酸用量25％～30％、液固质量比1．2：1、矿石粒度－200目、添加剂用量3％－5％的条件下，经两段氧压酸浸后，钒的浸出率可达90％以上。

The research on the new process of vanadium extraction from vanadium containing stone coal by acid leaching under oxygen pressure is described. Investigation is made on the effect of the leaching time, leaching temperature, leachant concentration,liquid/solid ratio, ore particle size and additive dosage on the leaching rate. The research result indicates that the vanadium leaching rate can be higher than 90% after two stage acidic leaching under oxygen pressure at a leaching time of 3 - 4 h, leaching temperature of 150 ℃, sulfuric acid dosage of 25% - 30%, liquid/solid mass ratio of 1.2：1 ,ore particle size of -200 mesh and additive dosage of 3% -5%.