|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||CFD Modeling and Simulation in Materials Processing
||Numerical Study of a Levitated Silicon Droplet for Solar Grade Silicon Refining
||Lei Gao, Guifang Zhang, Yingdong Yang, Zhe Shi, Benhui Shi, Peng Yan, Hua Wang
|On-Site Speaker (Planned)
Electromagnetic levitation(EML) is a potential technique for material refining, and was adopted to manipulate solar grade silicon(SoG-Si) from metallurgical grade silicon(MG-SI). With precisely controlled thermodynamic conditions, the stubborn impurities inside MG-SI, namely phosphorus and boron can be removed during levitation. However, the electrical conductivity of silicon is very sensitive to the temperature variation, which may cause the unstable oscillation of the levitated droplet. Besides, the effectivity of the refining process was all depends on the transfer process of the levitated molten silicon and the surrounded gas, which is hardly observed through experimental work. To predict silicon droplet levitated under high frequency AC electromagnetic field, a verified 3D numerical model was developed in the present study. The model was also coupled with commercial CFD software to predict transfer process during levitated silicon refining. The purpose is to indicate more details for this opaque process, and provide guidance for precise control.
||Planned: None Selected