Phase Control of Typical Impurities in Hazardous Selenium Waste and Preparation of High-Purity Selenium During Pre-oxidation and Vacuum Distillation Process. - Luo, Huan; Liu, Lang; Zha, Guozheng; Jiang, Wenlong; Yang, Bin; Wang, Fengkang; Xu, Baoqiang (Metallurgical & Materials Transactions. Part B, 2023)