Role of Oxygen Potential and Oxygen Ions on Phosphorus Removal from Silicon via Addition of FeO into Slag
文献类型：期刊论文
| 作者 | Zhang, Nan2,3; Qian, Guoyu3; Wang, Zhi3; Wei, Kuixian1; Ma, Wenhui1; Gong, Wei2 |
| 刊名 | SILICON
 |
| 出版日期 | 2020-05-01 |
| 卷号 | 12期号:5页码:1145-1156 |
| 关键词 | Solar grade silicon Slag refining P removal Oxygen potential Raman and NMR spectroscopy |
| ISSN号 | 1876-990X |
| DOI | 10.1007/s12633-019-00201-w |
| 英文摘要 | In present work, the role of the oxygen potential (P-O2) and oxygen ion (O2-) concentration for removing phosphorus (P) during CaO-SiO2-Al2O3-FexO slag refining was studied by on-line measurement of oxygen activity in molten silicon (Si), FactSage calculation, Raman spectroscopy and nuclear magnetic resonance (NMR) spectroscopy. The results show that the addition of FeO from 0 to 9.25 wt% in slag can increase the activity of dissolved oxygen (a([O])) in Si and the mole fraction of O2- in slag. Moreover, the increase of O2- concentration leads to the increase of non-bridge oxygen (NBO). The value of L-P (the partition ratio of phosphorous between slag and Si shows a first increase and then decrease trend and reaches a maximum value of 1.95 at 5 +/- 0.1 wt% FeO. It is believed that the increase of a([O]) and NBO can promote the removal of P as FeO content is less than 5 +/- 0.1 wt%. the chain structure unit (Q(2)) of silicate network as the main intermediate structure to capture PO43- from the charge compensation of P2O5 by O2- to form the sheet structure unit Q(3)(Si and P). When FeO content is increased to more than 5 +/- 0.1 wt%, L-P value gradually decreases although the values of NBO and a([O]) are increasing. NBO plays a leading role in this process, it can be speculated that more NBO can depolymerize the Q(3) (Si and P) to destroy the stability of P in silicate network. As a result, a mount of PO43- is present at the interface to prevent the oxidation of phosphorous, which leads to the decrease of L-P value. |
| WOS关键词 | METALLURGICAL-GRADE SILICON ; KERF LOSS SILICON ; DIAMOND-WIRE SAW ; BORON REMOVAL ; SLURRY WASTE ; POWDER ; IRON ; CAO-SIO2 ; RAMAN ; NMR |
| WOS研究方向 | Chemistry ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000527302800015 |
| 出版者 | SPRINGER |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/40919]  |
| 专题 | 中国科学院过程工程研究所 |
| 通讯作者 | Wang, Zhi |
| 作者单位 | 1.Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Yunnan, Peoples R China 2.Northeastern Univ, Sch Met, Ferrous Met Dept, Shenyang 110819, Liaoning, Peoples R China 3.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Nan,Qian, Guoyu,Wang, Zhi,et al. Role of Oxygen Potential and Oxygen Ions on Phosphorus Removal from Silicon via Addition of FeO into Slag[J]. SILICON,2020,12(5):1145-1156. |
| APA | Zhang, Nan,Qian, Guoyu,Wang, Zhi,Wei, Kuixian,Ma, Wenhui,&Gong, Wei.(2020).Role of Oxygen Potential and Oxygen Ions on Phosphorus Removal from Silicon via Addition of FeO into Slag.SILICON,12(5),1145-1156. |
| MLA | Zhang, Nan,et al."Role of Oxygen Potential and Oxygen Ions on Phosphorus Removal from Silicon via Addition of FeO into Slag".SILICON 12.5(2020):1145-1156. |
入库方式： OAI收割
来源：过程工程研究所
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