Patent ID: 9701878
Date: 2017-07-11
CPC Classifications: B24B,C02F,C09K

Claim:
1. A method for regenerating an abrasive from a used abrasive-containing slurry, the method comprising: (A) collecting an abrasive-containing slurry discharged from an abrasive device; (B) separating the abrasive from a mother liquid and concentrating the abrasive by adding an alkaline earth metal salt as an inorganic salt to the collected abrasive-containing slurry and aggregating the abrasive; (C) collecting the separated and concentrated abrasive; and (D) adjusting sizes of particles of the collected abrasive, after the step (C), wherein the abrasive is at least one selected from a group consisting of diamond, boron nitride, silicon carbide, alumina, alumina-zirconia and zirconium oxide, wherein in the step (D), a dispersing agent is added to a solution of the collected abrasive, and thereafter dispersion of the abrasive is conducted using an ultrasonic disperser or a bead mill disperser to control the sizes of the particles of the regenerated abrasive, and wherein a first abrasive-containing slurry that contains washing water and a second abrasive-containing slurry that was used are collected in the step (A).