The mechanism of boron removal from silicon alloy by electric field using slag treatment
文献类型：期刊论文
| 作者 | Wang, Zhi; Ge, Zhi; Liu, Junhao; Qian, Guoyu; Du, Bing |
| 刊名 | SEPARATION AND PURIFICATION TECHNOLOGY
 |
| 出版日期 | 2018-06-30 |
| 卷号 | 199页码:134-139 |
| 关键词 | High purity silicon Slagging treatment Boron removal Electric field Al-Si alloy |
| ISSN号 | 1383-5866 |
| DOI | 10.1016/j.seppur.2018.01.055 |
| 英文摘要 | Stubborn nonmetallic impurity boron is the most difficult to be removed by the metallurgical route for solar grade silicon (SoG-Si) production. To break through the restriction of separation of trace impurity, a novel approach by applying an electrical potential between the slag and the solvent phases to enhance silicon alloy refining using slag was developed. The effect of the external potential and refining time on boron removal has been investigated. For silicon, Al-Si, or Sn-Si system, it can be found that the removal efficiency of B substantially increased with the augment of the external potential. When the external potential was increased to 6 V, the partition ratio of boron increased to 5.7, which was about ten times than that without the external potential applied. Under the constant external potentials, the boron content also decreased with increasing refining time in the Al-Si system, and three stages of average removal velocity of boron were presented within 2 h. In addition, the synergistic removal mechanism of boron with electric field was investigated for the first time. For the electrode reaction, B is oxidated to the oxidizing products, then the oxide crosses the boundary layer rapdily and finally is absorbed by slag owing to the transfer of O2(-) at the anode, at the same time Si is produced at the cathode, which provides theoretical support for this new purification process. |
| WOS关键词 | METALLURGICAL-GRADE SILICON ; BLOWING REFINING TECHNIQUE ; MOLTEN SILICON ; SOLAR GRADE ; SEPARATION ; BEHAVIOR ; FLUX |
| 资助项目 | National Natural Science Foundation of China[51422405] ; National Natural Science Foundation of China[51704271] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000430784500015 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/24956]  |
| 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 |
| 通讯作者 | Wang, Zhi |
| 作者单位 | 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 | Wang, Zhi,Ge, Zhi,Liu, Junhao,et al. The mechanism of boron removal from silicon alloy by electric field using slag treatment[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2018,199:134-139. |
| APA | Wang, Zhi,Ge, Zhi,Liu, Junhao,Qian, Guoyu,&Du, Bing.(2018).The mechanism of boron removal from silicon alloy by electric field using slag treatment.SEPARATION AND PURIFICATION TECHNOLOGY,199,134-139. |
| MLA | Wang, Zhi,et al."The mechanism of boron removal from silicon alloy by electric field using slag treatment".SEPARATION AND PURIFICATION TECHNOLOGY 199(2018):134-139. |
入库方式： OAI收割
来源：过程工程研究所
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