| Role of minerals properties on leaching process of weathered crust elution-deposited rare earth ore | |
| Alternative Title | Role of minerals properties on leaching process of weathered crust elution-deposited rare earth ore |
| Xiao Yanfei1; Liu Xiangsheng1; Feng Zongyu1; Huang Xiaowei1; Huang Li1; Chen Yingying3; Wu Wenyuan4 | |
| 2015 | |
| Source Publication | JOURNAL OF RARE EARTHS
 |
| ISSN | 1002-0721 |
| Volume | 33Issue:5Pages:545-552 |
| Abstract | Granite belonged to intrusive rock and volcanic was extrusive rock. There may be many differences in their degree of weathering and mineral chemical composition. The present study investigated the minerals properties and the leaching mechanism of the granitic weathered crust elution-deposited rare earth ore from Longnan Rare Earth Mine area (LN ores) and volcanic weathered crust elution-deposited rare earth ore from Liutang Rare Earth Mine area (LT ores). The X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) were used to characterize the phase of rare earth ores. The particle size distributions and main composition of the ore were also presented in this paper. The leaching mechanisms of two kinds of rare earth ores were analyzed with different kinetics models and could be described by the shrinking-core model. They were all inner diffusion-controlled leaching processes. The leaching equation of the kinetics of the LN ores could be expressed as: |
| Other Abstract | Granite belonged to intrusive rock and volcanic was extrusive rock. There may be many differences in their degree of weathering and mineral chemical composition. The present study investigated the minerals properties and the leaching mechanism of the granitic weathered crust elution-deposited rare earth ore from Longnan Rare Earth Mine area (LN ores) and volcanic weathered crust elution-deposited rare earth ore from Liutang Rare Earth Mine area (LT ores). The X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) were used to characterize the phase of rare earth ores. The particle size distributions and main composition of the ore were also presented in this paper. The leaching mechanisms of two kinds of rare earth ores were analyzed with different kinetics models and could be described by the shrinking-core model. They were all inner diffusion-controlled leaching processes. The leaching equation of the kinetics of the LN ores could be expressed as: 1-2/3η_(LN)-(1-η_(LN))~(2/3)=0.106r_0~(-0.377)e~((1.096×10~4)/(8.314T))t, leaching equation of kinetics of LT ores was 1-2/3η_(LN)-(1-η_(LN))~(2/3)=0.33×10~(-3)r_0~(-0.411)e~((4.640×10~3)/(8.314T))t. The rare earth leaching rate of LT ores was always lower in the same condition, and it would need more time and more (NH4)2SO4 consumption to achieve the same rare earth leaching efficiency, which would lead to more serious ammonia-nitrogen pollution. Therefore, magnesium salt was proposed as the leaching agent to eliminate ammonia-nitrogen pollution and further studies would be taken in the future. |
| Keyword | AMMONIUM-SULFATE SEPARATION RECOVERY ELEMENTS KINETICS rare earths leaching granitic volcanic elution-deposited |
| Indexed By | CSCD |
| Language | 英语 |
| Funding Project | [National Science and Technology Support Program of China] |
| CSCD ID | CSCD:5414420 |
| Citation statistics |
Cited Times:21[CSCD]
[CSCD Record]
|
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/157412 |
| Collection | 中国科学院金属研究所 |
| Affiliation | 1.Natl Engn Res Ctr Rare Earth Materials, Gen Res Inst Nonferrous Met, Beijing 100088, Peoples R China 2.Grirem Adv Materials Co Ltd, Beijing 100088, Peoples R China 3.陕西省地震局 4.中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | Xiao Yanfei,Liu Xiangsheng,Feng Zongyu,et al. Role of minerals properties on leaching process of weathered crust elution-deposited rare earth ore[J]. JOURNAL OF RARE EARTHS,2015,33(5):545-552. |
| APA | Xiao Yanfei.,Liu Xiangsheng.,Feng Zongyu.,Huang Xiaowei.,Huang Li.,...&Wu Wenyuan.(2015).Role of minerals properties on leaching process of weathered crust elution-deposited rare earth ore.JOURNAL OF RARE EARTHS,33(5),545-552. |
| MLA | Xiao Yanfei,et al."Role of minerals properties on leaching process of weathered crust elution-deposited rare earth ore".JOURNAL OF RARE EARTHS 33.5(2015):545-552. |
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