(中南大学 冶金科学与工程学院，长沙 410083)
摘 要: 针对现行石煤提钒萃取工艺及研究现状，提出采用新型萃取剂HBL101从石煤高酸浸出料液中直接萃取钒的方案，考察料液的酸度、料液电位、萃取时间、相比以及温度对萃取率的影响，绘制HBL1010萃取等温曲线。结果表明：在料液酸度为1.458 mol/L，萃取温度为35~45 ℃，萃取时间为10min，相比O/A=1/1(油相与水相体积比)的条件下，钒的单级萃取率达到95%以上。三级逆流萃取实验结果显示，钒的萃取率达到99.7%以上。采用NaOH对负载有机相进行反萃，反萃液经调节pH后直接加入NH4Cl沉钒，得到的五氧化二钒纯度达到98.68%以上。
关键字: 石煤；钒；萃取；HBL101
（School of metallurgical Science and Engineering, Central South University, Changsha 410083, China）
Abstract:A new extractant HBL101 was used to directly extract vanadium from high acid leach solution of stone coal. The effects of acidity and potential of feed, time, phase ratio and temperature on the extraction of vanadium were investigated. The extraction distribution isotherms of vanadium were plotted. The extraction distribution isotherm was also obtained. The results show that the extraction of vanadium from the solution with 1.458 mol/L [H+] reaches 95% in single stage with A/O ratio of 1:1 (volume ratio of oil phase to aqueous phase) at 35-45 ℃ for 10 min. In three-stage counter current test, the extraction rate of vanadium is 99.7%. The loaded organic can be easily stripped using NaOH solution. After pH adjustment, the strip liquor is used to precipitate vanadium by adding NH4Cl. The final product of V2O5 with purity of 98.68% can be obtained.
Key words: stone coal; vanadium; extraction; HBL101
