从含钒石煤燃烧灰渣浸出液中萃取钒的实验研究  

Experimental Study on Extraction of Vanadium from Low Calorific Value Coal Ash Leaching Liquid

作　　者：朱军[1] 卫琛浩 齐建云[2] 唐洋洋[1] 刘欢[1] 朱明明[1] 

机构地区：[1]西安建筑科技大学冶金工程学院,陕西西安710055 [2]西北有色地质研究院,陕西西安710054

出　　处：《矿冶工程》2015年第6期81-84,共4页Mining and Metallurgical Engineering

基　　金：陕西省2011科技统筹重大地方专项(2011KPDZ01-04)

摘　　要：针对陕西某地低热值含钒石煤燃烧灰渣的硫酸浸出液,采用溶剂萃取法除杂并富集钒。结果表明:浸出液经中和还原处理后,采用12.5%P_(204)+5%TBP+82.5%磺化煤油进行4级逆流萃取,相比(O/A)为2,萃原液p H值为2,振荡时间为2 min,静置1 min,钒萃取率可达到99.31%。采用4级逆流反萃,反萃剂硫酸1.5 mol/L,相比(O/A)为4,振荡4 min,静置1 min,钒反萃率为96.94%。Stone coal vanadium always exists in the complex form and there are regional differences in the process of extraction of vanadium. As for the sulfuric acid leaching liquid of low-calorific value vanadium-containing stone coal ash,the process of solvent extraction was adopted to enrich vanadium and remove the impurities from the leaching liquid. The leaching liquid was firstly subjected to a neutralizing reduction process,followed by 4-stage countercurrent extraction with 12.5% P_（204）＋5% TBP ＋82.5% sulfonated kerosene,with phase ratio（ O / A） at 2,initial p H value of extraction at 2,2-min mixing and 1-min settling,resulting in vanadium extraction rate at 99. 31%. While the subsequent 4-stage countercurrent stripping with 1.5 mol / L sulfuric acid,phase ratio（ O / A） at 4,4-min mixing and 1-min settling,can result in the stripping yield of vanadium up to 96.94%.

关 键 词：石煤 灰渣 萃取 钒 P_(204) TBP 

分 类 号：TF804.2[冶金工程—有色金属冶金]