|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Alloys and Compounds for Thermoelectric and Solar Cell Applications IV
||Kinetics of Boron Removal from Metallurgical Grade Silicon Using High Basic Calcium Silicate Slag Refining
||Jijun Wu, Min Xu, Wenhui Ma, Kuixian Wei, Bin Yang, Yongnian Dai
|On-Site Speaker (Planned)
The non-metallic impurity boron can be removed from metallurgical grade silicon with a high efficiency using a CaO-SiO2 slag reagent. The distribution of born between slag and silicon (LB) is studied in theory and by experiments with different contents of CaO and SiO2 in reagent. The relationship of boron content in refined silicon and refining time is gotten and the corresponding kinetic equation for boron removal is deduced. The limiting concentration of boron removal from metallurgical grade silicon with the given experimental conditions is analyzed and obtained. Simultaneously, the mass transfer coefficient of boron in slag and silicon with CaO-SiO2 slag reagent refining is deduced and worked out. It is confirmed that the mass transfer of boron in molten silicon is the controlling step of boron removal with CaO-SiO2 slag refining.
||Planned: A print-only volume