中文摘要：

采用氢氟酸作为浸出剂浸出石煤矿石中钒,考查了矿样细度、氢氟酸浓度、浸出时间、浸出温度和液固比对钒浸出率的影响。结果表明,各因素对钒浸出率有显著影响,适宜的浸出条件为矿样-0.074 mm含量占75%、氢氟酸浓度3.5 mol/L、浸出时间8 h、浸出温度60℃、液固比3∶1、搅拌转速600 r/min,在此条件下,钒浸出率可达到97.91%。氢氟酸能取得较好浸钒指标的原因是其能溶解矿样中的含硅矿物,破坏矿样的晶体结构。

英文摘要：

Leaching vanadium from stone coal ore with HF as acid lixiviant were carried out,and the effects of fineness,HF acid concentration,leaching time,leaching temperature and liquid to solid ratio on vanadium leaching rate were investigated.The results indicated that the above factors have obvious effects on vanadium leaching rate,and the appropriate leaching condition is as-0.074 mm particles in the sample for 75%,HF acid concentration of 3.5 mol/L,leaching time for 8 h,leaching temperature at 60 ℃,liquid to solid ratio of 3∶1,and agitation speed of 600 r/min.And under these conditions,vanadium leaching rate can reach 97.91%.HF acid can effectively act with the vanadium-contained minerals and destroy its crystal structure,which is good for improving vanadium leaching rate.