METHOD FOR MANUFACTURING REGENERATED CERIUM OXIDE-BASED ABRASIVE PARTICLES, AND REGENERATED PARTICLES

摘要

[Problem] To provide a method for regenerating used cerium oxide-based abrasive particles in which treatment can be performed using a small amount of chemicals without the use of fluorides, the method for regenerating used cerium oxide-based abrasive particles being such that degradation over time of the abrasive performance of the regenerated cerium oxide-based abrasive is reduced. [Solution] This method comprises: dispersing used cerium oxide-based abrasive particles in water to obtain a slurry; making alkaline the slurry containing the used cerium oxide-based abrasive particles; removing a coagulant or another chemical used to recover the abrasive; making the abrasive particles into a slurry again; rendering the pH thereof acidic, whereby the abrasive particles and glass microparticles generated by polishing are separated; and heat-treating the recovered abrasive particles, whereby the used cerium oxide-based abrasive particles are regenerated.