贵州铜仁含钒石煤氧压酸浸萃取提钒研究  

Study on Extracting Vanadium from Vanadium-bearing Stone Coal of Guizhou Tongren by Acid Leaching Extraction under Oxygen Pressure

作　　者：魏昶[1] 邓志敢[1] 樊刚[1] 李旻廷[1] 李存兄[1] 吴惠玲[1] 

机构地区：[1]昆明理工大学材料与冶金工程学院,云南昆明650093

出　　处：《矿冶工程》2009年第4期54-58,共5页Mining and Metallurgical Engineering

基　　金：十一.五国家高技术研究发展计划(863计划)资助(2006AA06Z130);云南省科技厅支持项目(2007GA010)

摘　　要：系统介绍了含钒石煤氧压酸浸萃取提钒新工艺的研究情况。利用多种检测方法，研究了贵州铜仁石煤矿中钒的矿物学特征，在此基础上，研究考察了影响钒浸取率的各种因素，试验结果表明，在浸出时间3—4h、浸出温度150℃、硫酸用量39％-42％、液固比1．2：1、矿石粒度-0．074mm、Po2 1．2MPa、添加剂用量3％-5％的条件下，经氧压酸浸后，钒的浸出率可达92％以上。浸出液采用酸回收．还原除铁．溶剂萃取．氨水沉钒．热解的工艺流程，得到V：0，含量为99．5％的粉状产品，钒的总回收率达80％以上。A new process of extracting vanadium from vanadium-bearing stone coal by acid leaching extraction under oxygen pressure was introduced systematically. The mineralogy characteristics of vanadium in stone coal of Guizhou Tongren were investigated by various detecting methods and on the basis of it the factors which influence the leaching rate of vanadium were also investigated. The results show that after oxygen pressurized acid leaching, the leaching rate of vanadium can reach above 92% under the conditions that leaching time is 3 -4 h, leaching temperature is 150 ℃, the dosage of sulfuric acid is 39% - 42%, the liquid-to-solid ratio is 1.2： 1, the particle size is - 0.074 mm, Po2 is 1.2 MPa and the additive dosage is 3% - 5%. The technological process of acid recovery-reduction deferrization-solvent extraction-precipitating vanadium by ammonium water-pyrolysis was used for the leaching solution, the powder products with V2O5 content of 99.5% was obtained and the gross recovery of vanadium achieved above 80%.

关 键 词：石煤 提钒 氧压 酸浸 酸回收 萃取 

分 类 号：TF841.3[冶金工程—有色金属冶金]