An environmental friendly Na2CO3-roasting decomposition strategy for the mixed rare earth concentrate
文献类型：期刊论文
| 作者 | Zhao, Junmei; Pan, Feng; Liu, Huizhou |
| 刊名 | SEPARATION AND PURIFICATION TECHNOLOGY
 |
| 出版日期 | 2016-08-10 |
| 卷号 | 168期号:AUG页码:161-167 |
| 关键词 | Mixed RE concentrate Na2CO3 Decomposition Bastnaesite Monazite H2SO4-leaching Sintering |
| ISSN号 | 1383-5866 |
| 英文摘要 | The decomposition of the mixed RE (rare earth) concentrate bastnaesite (RECO3F) and monazite (REPO4) has been investigated extensively for a few decades. In this work, a novel environmental friendly Na2CO3-based roasting decomposition strategy for the mixed RE concentrate has been proposed. It is a two-step strategy combining air-oxidation and Na2CO3-roasting. In the first step of air-oxidation, almost all of bastnaesite decomposes. While more than 95% of monazite decomposes in the second Na2CO3-roasting step. Thus, the consumption of Na2CO3 in the current proposed process would decrease greatly. The Na2CO3-roasting phenomena were compared among the reactions of Na2CO3-mixed RE concentrate, Na2CO3-pure bastnaesite and Na2CO3-the first leaching residue by H2SO4. The air-roasting temperature was optimized. In particular, the roasting temperature for the reaction of Na2CO3 and H2SO4-leaching residue has been optimized according to P- and Ce-leaching percents. Finally, following the proposed flowsheet under the optimized conditions, taking 50 g of mixed RE concentrate as feedings, the final solid residue occupies around 2.4%. In addition, about 70% of F and 87% of P can be transferred into H2SO4-leaching liquor and H2O-leaching liquor, respectively. 93.7% of Th and 96.6% of RE can be leached. Finally, a H2SO4-leaching liquor containing Th, Ce(IV), RE(III) and F can be obtained for the subsequent separation. (C) 2016 Elsevier B.V. All rights reserved. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Engineering, Chemical |
| 研究领域[WOS] | Engineering |
| 关键词[WOS] | CYANEX 923 ; RECOVERY ; MINERALS ; HYDROMETALLURGY ; TECHNOLOGY ; CERIUM(IV) ; BASTNASITE ; EXTRACTION ; MONAZITE ; KINETICS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000378951800020 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/21186]  |
| 专题 | 过程工程研究所_湿法冶金清洁生产技术国家工程实验室 |
| 作者单位 | Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Junmei,Pan, Feng,Liu, Huizhou. An environmental friendly Na2CO3-roasting decomposition strategy for the mixed rare earth concentrate[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2016,168(AUG):161-167. |
| APA | Zhao, Junmei,Pan, Feng,&Liu, Huizhou.(2016).An environmental friendly Na2CO3-roasting decomposition strategy for the mixed rare earth concentrate.SEPARATION AND PURIFICATION TECHNOLOGY,168(AUG),161-167. |
| MLA | Zhao, Junmei,et al."An environmental friendly Na2CO3-roasting decomposition strategy for the mixed rare earth concentrate".SEPARATION AND PURIFICATION TECHNOLOGY 168.AUG(2016):161-167. |
入库方式： OAI收割
来源：过程工程研究所
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