| 湘西石煤中钒的氧化浸出动力学 |
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| 引用本文： | 华骏,颜文斌,陈益超,高峰,赵丹妮.湘西石煤中钒的氧化浸出动力学[J].矿冶工程,2018,38(5):92-95. |
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| 作者姓名： | 华骏 颜文斌 陈益超 高峰 赵丹妮 |
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| 作者单位： | 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 |
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| 基金项目： | 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) |
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| 摘 要： | 在石煤提钒酸浸过程中加入助浸剂硝酸钠,研究了石煤氧化浸出机理。单因素和正交试验结果表明,在浸出温度95 ℃、固液比1∶2、硫酸用量27%、浸出时间11 h、搅拌速度600 r/min、硝酸钠用量1%时,钒浸出率为93.04%。直接酸浸和氧化酸浸动力学研究表明,直接酸浸过程钒浸出属于化学反应控制,表观活化能为70.41 kJ/mol;氧化酸浸过程钒浸出属于化学反应控制,表观活化能为47.43 kJ/mol。氧化酸浸可以降低活化能,有利于石煤中钒的浸出。
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| 关 键 词： | 石煤钒矿 氧化浸出 酸浸 动力学 活化能 钒 |
| 收稿时间： | 2018-04-01 |
Kinetics of Oxidative Leaching of Vanadium from Stone Coal of Xiangxi in Hunan Province |
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| HUA Jun,YAN Wen-bin,CHEN Yi-chao,GAO Feng,ZHAO Dan-ni.Kinetics of Oxidative Leaching of Vanadium from Stone Coal of Xiangxi in Hunan Province[J].Mining and Metallurgical Engineering,2018,38(5):92-95. |
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| Authors: | HUA Jun YAN Wen-bin CHEN Yi-chao GAO Feng ZHAO Dan-ni |
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| Affiliation: | 1.College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, Hunan, China;
2.Innovation Center of Manganese-Zinc-Vanadium Industrial Technology (2011 Plan of Hunan Province), Jishou 416000, Hunan, China;
3.Key Laboratory of Cleaner Production of Minerals and Development of Green Functional Materials in Hunan Province, Jishou 416000, Hunan, China |
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| Abstract: | A leaching aid, sodium nitrate was added into the acid leaching process of vanadium from stone coal for investigating the mechanism of oxidative leaching of stone coal. The single factor experiment and orthogonal test showed that leaching at 95 ℃ for 11 h with solid-liquid ratio at 1∶2, stirring speed at 600 r/min, dosage of sulfuric acid and sodium nitrate at 27% and 1%, respectively, resulted in the leaching rate of vanadium reaching 93.04%. Kinetics of direct acid leaching and oxidative acid leaching indicated that vanadium extraction in direct acid leaching process was controlled by chemical reaction, and the apparent activation energy was estimated to be 70.41 kJ/mol. And vanadium extraction in oxidative acid leaching was also controlled by chemical reaction with the apparent activation energy estimated to be 47.43 kJ/mol. It is concluded that oxidative acid leaching could lower the activation energy, thus beneficial to the leaching of vanadium from stone coal. |
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| Keywords: | stone coal vanadium ore oxidative leaching acid leaching kinetics activation energy vanadium |
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