过硫酸钠氧化浸出石煤中的钒及其动力学研究  

Study on Oxidation Leaching of Vanadium from Stone Coal with Sodium Persulfate and its Kinetics

作　　者：华骏[1,2,3] 颜文斌 高峰[1,2,3] 蔡俊 HUA Jun;YAN Wen-bin;GAO Feng;CAI Jun(College of Chemistry and Chemical Engineering,Jishou University,Jishou 416000,China;The Collaborative Innovation Center of Manganese-zinc-vanadium Industrial Technology "the 2011 Plan of Hunan Province",Jishou University,Jishou 416000,China;Key Laboratory of Mineral Cleaner Production and Exploit of Green Functional Materials in Hunan Province, Jishou University,Jishou 416000,China)

机构地区：[1]吉首大学化学化工学院,湖南吉首416000 [2]湖南省2011计划"锰锌钒产业技术"协同创新中心,湖南吉首416000 [3]矿物清洁生产与绿色功能材料开发湖南省重点实验室,湖南吉首416000

出　　处：《稀有金属与硬质合金》2019年第1期1-5,共5页Rare Metals and Cemented Carbides

基　　金：国家自然科学基金(21566010);湖南省教育厅科研项目(16C1305);2017年"锰锌钒产业技术"湖南省2011协同创新中心开放基金项目(JSK2017MZV013)

摘　　要：为了探讨石煤氧化浸出机理,在常压下采用硫酸溶液直接浸出石煤钒矿,通过在酸浸过程中加入氧化剂过硫酸钠,考察了各工艺条件对V浸出率的影响。结果表明:在过硫酸钠用量2%、硫酸用量35%、固液比1∶1、浸出温度95℃、浸出时间11 h的实验条件下,V浸出率达到88.9%。对不同反应温度下V浸出率-时间曲线进行拟合,拟合结果表明该氧化浸出过程符合收缩未反应芯模型,浸出过程受颗粒表面化学反应控制。根据Arrhenius公式,使用曲线拟合法,近似求得该反应表观活化能为66.08 kJ·mol^(-1)。In order to explore the mechanism of oxidation leaching of stone coal,the vanadium was leached directly from stone coal vanadium ore by sulfuric acid solution at atmospheric pressure.By adding sodium persulfate in the process of acid leaching,the effects of various conditions on vanadium leaching rate were investigated.The results show that V leaching rate reached 88.9% under the experimental conditions of sodium persulfate 2% ,sulfuric acid 35 %,solid-liquid ratio 1:1,leaching temperature 95℃ and leaching time 11 h.Fitting the V leaching rate-time curves at different reaction temperatures shows that the oxidation leaching process conforms to the shrinking core model and the leaching process is controlled by the chemical reaction on the particle surface.According to Arrhenius equation,the apparent activation energy of the reaction was approximately calculated to be 66.08 kJ ·mol^-1 by using curve fitting method.

关 键 词：石煤 钒 过硫酸钠 氧化浸出 动力学 

分 类 号：TF841.3[冶金工程—有色金属冶金]