| 磷矿中稀土浸出的动力学研究 |
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| 引用本文： | 汪胜东,蒋开喜,蒋训雄,冯林永,范艳青,蒋伟,张登高. 磷矿中稀土浸出的动力学研究[J]. 有色金属(冶炼部分), 2011, 0(9): 24-27. DOI: 10.3969/j.issn.1007-7545.2011.09.007 |
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| 作者姓名： | 汪胜东 蒋开喜 蒋训雄 冯林永 范艳青 蒋伟 张登高 |
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| 作者单位： | 1. 东北大学,沈阳110819;北京矿冶研究总院,北京100070
2. 北京矿冶研究总院,北京,100070 |
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| 基金项目： | 国家科技支撑计划项目(2007BAB08B03) |
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| 摘 要： | 研究了硝酸浸出磷矿中稀土的动力学,考察了温度、浓度、粒度对稀土浸出率的影响。结果表明,提高温度和浓度、减小粒度均能提高稀土浸出率。浸出过程符合未反应收缩核模型,受界面化学反应控制,表观活化能为70.6 kJ/mol,表观反应级数为0.83级。
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| 关 键 词： | 磷矿 稀土 浸出 动力学 |
| 收稿时间： | 2011-04-12 |
Kinetic Study on Leaching of RE in Phosphorite |
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| WANG Sheng-dong,JIANG Kai-xi,JIANG Xun-xiong,FENG Ling-yong,FAN Yan-qing,JIANG Wei and ZHANG Deng-gao. Kinetic Study on Leaching of RE in Phosphorite[J]. Nonferrous Metals(Extractive Metallurgy), 2011, 0(9): 24-27. DOI: 10.3969/j.issn.1007-7545.2011.09.007 |
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| Authors: | WANG Sheng-dong JIANG Kai-xi JIANG Xun-xiong FENG Ling-yong FAN Yan-qing JIANG Wei ZHANG Deng-gao |
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| Affiliation: | WANG Sheng-dong1,2,JIANG Kai-xi2,JIANG Xun-xiong2,FENG Ling-yong2,FAN Yan-qing2,JIANG Wei2,ZHANG Deng-gao2(1.Northeastern University,Shenyang 110819,China,2.Beijing General Research Institute of Mining & Metallurgy,Beijing 100070,China) |
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| Abstract: | The leaching kinetics of RE from pospheric ore by nitric acid was studied. The effecting factors, such as temperature, acid concentration and particle size, on RE leaching rate were investigated. The result showed that increasing temperature and acid concentration, reducing particle size could accelerate the leaching rate of RE. An unreacted shrinking core model was used to describe the leaching process and the kinetic equation was obtained. The leaching process was controlled by the interfacial chemical reaction. The apparent activation energy was calculated to be 70.6 kJ/mol, and the apparent reaction order was 0.83. |
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| Keywords: | Phosphorite RE Leaching Kinetic |
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