Solidification refining of MG-Si by Al-Si alloy under rotating electromagnetic field with varying frequencies

被引：16
作者：
Ban, Boyuan [1 ]
Zhang, Taotao [2 ]
Li, Jingwei [1 ]
Bai, Xiaolong [1 ]
Pan, Xu [1 ]
Chen, Jian [1 ]
Tabaian, Seyed Hadi [3 ]
机构：
[1] Chinese Acad Sci, Hefei Inst Phys Sci, Inst Appl Technol, Key Lab Photovolta & Energy Conservat Mat, Hefei 230031, Peoples R China
[2] Chinese Acad Sci, Hefei Inst Phys Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
[3] Amirkabir Univ Technol, Dept Min & Met Engn, Tehran 1591634311, Iran
来源：
SEPARATION AND PURIFICATION TECHNOLOGY | 2018年 / 202卷
基金：
中国国家自然科学基金;
关键词：
Rotating electromagnetic field; Solidification; Refining; Al-Si alloy; METALLURGICAL-GRADE SILICON; MAGNETIC-FIELD; SEPARATION MECHANISM; BORON REMOVAL; MELT; PURIFICATION; ENRICHMENT; PHOSPHORUS; SYSTEM; PHASE;
D O I：
10.1016/j.seppur.2018.03.069
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Aiming to develop an effective solidification purification process by Al-Si alloy refining method, experiments under rotating electromagnetic field (REMF) with varying frequencies have been carried out. High B/P removal rates under REMF can be confirmed. A primary Si-rich layer formed near the side surface of the sample, while the interior of the sample is mainly eutectic Si/Al. Effect of varying frequency of REMF on alloy structure, size of the primary Si flakes and B/P contents in the primary Si flakes are studied. An apparent segregation coefficient is introduced to describe refining process. The apparent segregation coefficients of B and P are determined to be 0.12 and 0.06 respectively when the frequency of REMF and the cooling rate are10 Hz and 50 mK s(-1) respectively.
引用
收藏
页码：266 / 274
页数：9
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