Innovative separation model for boron removal from silicon during slag refining based on ion and molecule coexistence theory
文献类型：期刊论文
| 作者 | Li, Shijian1,2; Qian, Guoyu2,3; Sun, Yiwei2,3; Pang, Sheng2,3; Wang, Dong1,2,3; Wang, Zhi1,2,3 |
| 刊名 | METALLURGICAL RESEARCH & TECHNOLOGY
 |
| 出版日期 | 2022-06-01 |
| 卷号 | 119期号:3页码:12 |
| 关键词 | silicon waste recycling slag refining thermodynamic distribution model ion and molecule coexistence theory boron distribution ratio |
| ISSN号 | 2271-3646 |
| DOI | 10.1051/metal/2022024 |
| 英文摘要 | How to reduce boron concentration to an extremely low level has become a major obstacle during silicon waste recycling. As a simple and efficient method of removing impurities, slag refining plays an increasingly important role for industrial silicon waste recovery. The deboration ability of slag is usually evaluated by boron distribution ratio L-B. However, the development of a separation prediction model is challenged by the limitations on the recognition of impurity structure in slag and complexity of slag-silicon reactions. Herein, a novel thermodynamic model for predicting boron distribution ratio between CaO-SiO2 based slags and molten silicon has been developed based on ion and molecule coexistence theory (IMCT), i.e., IMCT-L-B model. The reaction abilities of structural units are represented by the calculated mass action concentration. The predictive boron distribution ratio between CaO-SiO2, CaO-Al2O3-SiO2, CaF2-CaO-SiO2 slags and silicon correspond well with experimental data, reflecting the reasonability of IMCT-L-B model. According to IMCT, deboration reactions between slags and silicon can be represented by ion couples (Ca2+ + O2-), simple molecule Al2O3 with SiO2 to form eight deboration products as B2O3, 3CaO center dot B2O3, 2CaO center dot B2O3, CaO center dot B2O3, CaO center dot 2B(2)O(3), 2Al(2)O(3 )center dot B2O3, 9Al(2)O(3 )center dot B2O3, CaO center dot 2SiO(2 )center dot B2O3. With the developed IMCT-L-B model, the respective boron distribution ratio L-B,(i) of the eight deboration products can be determined quantitatively. Furthermore, the effect of temperature, mass ratio of CaO to SiO2 (%CaO/%SiO2), Al2O3 and CaF2 content of CaO-SiO2 based slags on L-B are fully discussed. |
| WOS关键词 | METALLURGICAL SILICON ; THERMODYNAMIC MODEL ; GRADE-SILICON ; PHOSPHORUS ; CAO-SIO2 ; BEHAVIOR |
| 资助项目 | National Natural Science Foundation of China[51934006] ; National Natural Science Foundation of China[U1902219] |
| WOS研究方向 | Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000804251700001 |
| 出版者 | EDP SCIENCES S A |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/53678]  |
| 专题 | 中国科学院过程工程研究所 |
| 通讯作者 | Qian, Guoyu; Wang, Dong; Wang, Zhi |
| 作者单位 | 1.Chinese Acad Sci, Ganjiang Innovat Acad, Ganzhou 341119, Peoples R China 2.Chinese Acad Sci, Natl Engn Res Ctr Green Recycling Strateg Met Res, Inst Proc Engn, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Shijian,Qian, Guoyu,Sun, Yiwei,et al. Innovative separation model for boron removal from silicon during slag refining based on ion and molecule coexistence theory[J]. METALLURGICAL RESEARCH & TECHNOLOGY,2022,119(3):12. |
| APA | Li, Shijian,Qian, Guoyu,Sun, Yiwei,Pang, Sheng,Wang, Dong,&Wang, Zhi.(2022).Innovative separation model for boron removal from silicon during slag refining based on ion and molecule coexistence theory.METALLURGICAL RESEARCH & TECHNOLOGY,119(3),12. |
| MLA | Li, Shijian,et al."Innovative separation model for boron removal from silicon during slag refining based on ion and molecule coexistence theory".METALLURGICAL RESEARCH & TECHNOLOGY 119.3(2022):12. |
入库方式： OAI收割
来源：过程工程研究所
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