Clean enhancing elimination of boron from silicon kerf using Na2O-SiO2 slag treatment

Silicon kerf waste can be used as a secondary resource for the recovery of high purity silicon for solar cells production. Boron is amongst the most deleterious impurities in silicon and its concentration should be strictly controlled. Slag treatment is considered an effective method to extract impurities, especially boron, from silicon kerf. The study investigated the feasibility and optimization of a process for producing high-purity silicon …