|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Modeling the Electromagnetic Processing of Recycled Silicon Dust
||Georgi Stefanov Djambazov, Koulis Pericleous, Valdis Bojarevics, Michele Forzan, Fabrizio Dughiero
|On-Site Speaker (Planned)
||Georgi Stefanov Djambazov
The kerf loss from the production of Si wafers for solar panels is pelletized and then remelted in an induction furnace with graphite susceptors. The furnace has a square cross-section quartz crucible and is surrounded by an induction coil that enables directional solidification of the new ingot. Once melted, silicon becomes electrically conductive and subject to stirring by electromagnetic Lorentz force. In order to recycle the silicon, particulate impurities (due to the sawing, or condensed silicon oxides) need to be removed. The electromagnetic Kolin-Leenov force is used for this purpose, through a novel dual frequency induction scheme.
Three-dimensional numerical modeling captures the electromagnetic, fluid-flow and heat-transfer effects in this problem, achieved in a common finite volume computational framework. Results are presented for the typical electromagnetic, velocity and force fields encountered in this type of directional solidification furnace. Conclusions are drawn about the expected effectiveness of the electromagnetic separation system.
||Planned: A CD-only volume