Roasting decomposition of mixed rare earth tailings by CaO in reducing atmosphere
文献类型：期刊论文
| 作者 | Yuan Shuai; Yang He; Xue XiangXin; Zhou Yan |
| 刊名 | RARE METALS
 |
| 出版日期 | 2017 |
| 卷号 | 36期号:9页码:764-768 |
| 关键词 | CAO-NACL-CACL2 Mixed rare earth tailings Reducing roasting Leaching ratio |
| ISSN号 | 1001-0521 |
| 其他题名 | Roasting decomposition of mixed rare earth tailings by CaO in reducing atmosphere |
| 英文摘要 | In Baotou rare earth tailings ore, the grade of rare earth is close to that of the raw ore nearly. The rare earths are discarded in tailings dam caused by a serious waste of resources. First of all, the decomposition products of bastnaesite- and monazite-mixed rare earth tailings in CaO in reducing atmosphere were studied by means of X-ray diffraction (XRD). The results show that the normal products are CeO2, Ce2O3, Ca5F(PO4)(3), and Ce0.75Nd0.25O1.875, and there are no REPO4 and REFCO3. Secondly, the roasted product was extracted in HCl, and the relationship among roasting time, roasting temperature, CaO addition, and extraction temperature was studied by the quadratic regression-orthogonal analysis. Through analysis, the optimum process conditions of mixed rare earth tailings extracted are obtained as follows: roasting time of 60 min, roasting temperature of 800 A degrees C, CaO addition of 30 %, extraction temperature of 80 A degrees C, and extraction ratio of 99.18 %. |
| 资助项目 | [Development Program of National Key Basic Research] |
| 语种 | 英语 |
| CSCD记录号 | CSCD:6084545 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/156029]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 作者单位 | 中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Yuan Shuai,Yang He,Xue XiangXin,et al. Roasting decomposition of mixed rare earth tailings by CaO in reducing atmosphere[J]. RARE METALS,2017,36(9):764-768. |
| APA | Yuan Shuai,Yang He,Xue XiangXin,&Zhou Yan.(2017).Roasting decomposition of mixed rare earth tailings by CaO in reducing atmosphere.RARE METALS,36(9),764-768. |
| MLA | Yuan Shuai,et al."Roasting decomposition of mixed rare earth tailings by CaO in reducing atmosphere".RARE METALS 36.9(2017):764-768. |
入库方式： OAI收割
来源：金属研究所
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