Separation of ultrafine ceria-based abrasive particles from glass polishing powder waste through liquid-liquid-powder extraction

摘要

Glass polishing powder waste comprises ultrafine particles of ceria-based abrasive and polished glass powder. This study investigated the separation of ceria-based abrasive particles from glass polishing powder waste through liquid-liquid-powder extraction. Kerosene was used as the oil phase, and sodium oleate (NaOL) was used as the surfactant collector. First, the properties of the ceria-based abrasive/glass powder particles transferred from the water phase to the kerosene phase and the effect of surfactant collector addition were investigated individually. Then, separation of ceria-based abrasive from an artificial particle mixture of ceria-based abrasive and glass powder was carried out to determine the optimal extraction conditions. Finally, the method was applied to a glass polishing powder waste.