含钒黏土矿直接酸浸提钒及其动力学研究  

A Kinetics Study for Recovery of Vanadium from Vanadium⁃Bearing Clay Ore Using Direct Acid Leaching

作　　者：石美莲 华骏[2,3] 颜文斌 高峰[2,3] 蔡俊 SHI Mei-lian;HUA Jun;YAN Wen-bin;GAO Feng;CAI Jun(Quality Inspection and Metrology Verification Center of Xiangxi Tujia and Miao Autonomous Prefecture,Jishou 416000,Hunan,China;College of Chemistry and Chemical Engineering,Jishou University,Jishou 416000,Hunan,China;Collaborative Innovation Center of Manganese-Zinc-Vanadium Industrial Technology(2011 Plan of Hunan Province),Jishou 416000,Hunan,China)

机构地区：[1]湘西土家族苗族自治州质量检验及计量检定中心,湖南吉首416000 [2]吉首大学化学化工学院,湖南吉首416000 [3]湖南省2011计划“锰锌钒产业技术”协同创新中心,湖南吉首416000

出　　处：《矿冶工程》2021年第1期94-97,共4页Mining and Metallurgical Engineering

基　　金：湖南省自然科学基金青年基金(2018JJ3413);“锰锌钒产业技术”湖南省2011协同创新中心开放基金(MXF201918)。

摘　　要：为了有效利用陕西某地含钒黏土矿,采用直接酸浸工艺提钒,考察了液固比、浸出温度、浸出时间、硫酸用量对直接酸浸提钒的影响,通过浸出反应动力学确定了反应模型。结果表明,在硫酸用量25%、浸出温度95℃、浸出时间10 h、液固比0.6时,钒浸出率为74.6%。该含钒黏土矿的钒浸出动力学符合收缩核模型,其表观活化能约为30.73 kJ/mol,浸出反应服从扩散控制过程。In order to effectively utilize the vanadium⁃bearing clay ore in Shaanxi Province,a direct acid leaching process was proposed to extract vanadium.The effects of liquid⁃to⁃solid ratio,leaching temperature,leaching time,and sulfuric acid dosage on the direct acid leaching of vanadium were investigated,and the reaction model was confirmed based on the leaching reaction kinetics analysis.The results show that after leaching at 95℃for 10 h by adding 25%of sulfuric acid,with the liquid⁃solid ratio at 0.6,the vanadium leaching rate is 74.6%.The kinetics of leaching vanadium from this vanadium⁃bearing clay ore conforms to the shrinking core model and its apparent activation energy is calculated to be about 30.73 kJ/mol.It is shown that the leaching reaction is a diffusion⁃controlled process.

关 键 词：钒 含钒黏土矿 直接酸浸 提钒 动力学 

分 类 号：TF841.3[冶金工程—有色金属冶金]